Some standard content:
Chemical Industry Standard of the People's Republic of China
Rubber Lifting Belt
1 Subject Content and Scope of Application
HG/T 2577-94
This standard specifies the product classification, technical requirements, test methods, inspection rules and marking, packaging, transportation and storage of fabric core and wire rope mesh core lifting belts.
This standard applies to lifting belts for belt bucket elevators (hereinafter referred to as belts). 2 Reference standards
GB/T526 Specification for the appearance quality of fabric core conveyor beltsGB/T528 Determination of tensile properties of vulcanized rubber and thermoplastic rubberGB/T 1689
GB/T 3512
GB/T 3690
GB/T 4490
Determination of wear resistance of vulcanized rubber (using Akron abrasion machine)Test method for hot air aging of rubber
Test method for tensile properties of flat tape
Conveyor belt dimensions
GB5752
Conveyor belt marking
GB/T5753
Determination of cover thickness of steel cord conveyor beltsGB/T 5754
GB/T 5755
GB/T6757
GB/T 6759
GB/T 9770
HG/T2194
HG/T 2297
HG/T 2410
3 Product classification
3.1 Structural type
Determination of longitudinal tensile strength of steel cord conveyor beltsDetermination of steel cord bonding strength of steel cords in steel cord conveyor beltsGeneral rules for storage and handling of conveyor belts
Test method for interlayer bonding strength of conveyor beltsWire cord conveyor belts
Regulations for fabric layer joints of canvas core conveyor belts
Heat-resistant conveyor belts
Conveyor belt sampling
The core structure of the belt is divided into two types: fabric core and steel cord mesh core. 3.1.1 Fabric core belt
The entire belt core of the belt can be made of one or more layers of fabric bonded in the same structural manner, and the belt core should generally have a covering layer. A reinforcement layer made of mesh cloth or cord fabric can be provided between the cover layer and the belt core. 3.1.2 Steel Wire Mesh Core Belt
The belt is composed of a layer of steel wire rope arranged longitudinally in the core rubber layer (hereinafter referred to as longitudinal rope) and an upper and lower layer of fiber rope or steel wire rope arranged transversely between the cover layer and the core rubber layer (hereinafter referred to as transverse rope). 3.2 Product Specifications
The specifications of the belt are distinguished by the full thickness tensile strength, width and physical properties of the cover layer. Approved by the Ministry of Chemical Industry of the People's Republic of China on February 9, 1994 and implemented on January 1, 1995
HG/T 2577—94
3.2.1 The longitudinal full-thickness tensile strength of the fabric core belt is shown in Table 4. The strength in N/mm is arranged according to the R10 priority number system. 3.2.2 The strength specifications of the wire rope mesh core belt are represented by the letter "ST\ and the nominal value of the longitudinal tensile strength (in N/mm), and its series is shown in Table 2.
3.2.3 Width specifications
The width specifications of the fabric core belt are specified in Table 1. The width specifications of the wire rope mesh core belt are shown in Table 2. 3.2.4 Physical properties and grades of the cover layer
According to the abrasiveness and load of the conveyed material, it is divided into severe wear (type D), moderate wear (type L Type) and heat-resistant type (T type) for conveying high-temperature materials, the performance is shown in Table 3.
3.3 Marking
3.3.1 Example of model marking for fabric core belt: 1000B
Example of model marking for wire rope mesh core belt: 3.3.2
ST 1000
4 Technical requirements
4.1 Length, width, thickness and limit deviation of fabric core belt NN5
Frame material and number of layers
Belt width (mm)
Thickness of lower covering layer (mm)
Upper covering layer with reinforcement layer
Thickness of upper covering layer (mm)
Year and month of production
Bucket elevator belt
Strength specification (N/mm)
Diameter of longitudinal wire rope (mm)
Belt width (mm)
Lower covering layer with reinforcement layer
Lower covering Thickness of cover layer (mm)
The upper cover layer has a reinforcement layer
Thickness of upper cover layer (mm)
Year and month of production
Bucket elevator beltwwW.bzxz.Net
Strength specification (N/mm)
4.1.1 The limit deviation of the end belt length should be ±2.5% and 0% of the belt length. 4.1.2 The width and limit deviation of the belt should comply with the provisions of Table 1. Table 1
Belt width, mm
Limit deviation
The maximum difference in width of each belt
Not more than 6.5mm
Belt width, mm
HG/T 2577—94
Continued Table 1
Limit deviation
Nominal width ±1%
Maximum difference in width of each strip
Not more than 1% of the nominal width
4.1.3 The cover thickness and limit deviation of the strip and the total thickness and maximum difference of the strip shall comply with the provisions of GB/T4490. 4.2 The structure and dimensions of the wire rope mesh core strip are shown in Figure 1 and Table 2. b
middle t single type
b—width of belt, b1—center distance between the two ends of the longitudinal rope; b2 one side rubber width, d--longitudinal braid diameter se--eccentricity of the longitudinal rope in the thickness direction, -reference line for eccentricity measurement, -thickness of belt t1--upper cover thickness-lower cover thickness 3distance between transverse rope and belt edge the distance between transverse rope and longitudinal rope, plongitudinal rope spacing Table 2
Belt strength specifications
Longitudinal tensile strength, N/mm
Thickness of upper cover layer of belt, mm
Thickness of lower cover layer of belt, mm
Minimum breaking force of single longitudinal rope, N/root
Maximum nominal diameter of longitudinal rope, mm
Longitudinal rope spacing, mm
ST1000
ST1250
ST 1600
ST2000
ST2500
Belt Strength Specifications
Note: The belt cover thickness includes the transverse reinforcement layer. HG/T 2577-94
Continued Table 2
The longitudinal rope configuration and joints shall comply with the provisions of GB/T9770. 4.2.1
ST1000
ST1250
The length and width deviations of the wire rope mesh core belt shall comply with the provisions of GB/T4490. 4.2.3
The limit deviation of the cover thickness is -0.5mm. ST1600
ST2000
The maximum difference in belt thickness (i.e. the difference between the maximum thickness and the minimum thickness) shall not be greater than 10% of the average thickness. 4.2.43
4.2.5 The width of the edge glue of the belt shall not be less than 10mm. ST2500
4.2.6 The limit deviation of the average rope pitch of the longitudinal rope is ±1.5mm. The number of longitudinal ropes with a single rope pitch deviation greater than 1.5mm but not greater than 3.0mm shall not exceed 5% of the total number of longitudinal ropes. 4.2.7 The eccentricity of the longitudinal rope in the thickness direction shall not be greater than 1.5mm. The number of weaving ropes with an eccentricity greater than 1.0mm but not greater than 1.5mm shall not exceed 5% of the total number of longitudinal ropes. 4.3 Configuration and size of transverse ropes
4.3.1 The maximum nominal diameter of the transverse rope is 0.92mm, and the ratio of its center distance to diameter shall be 2 to 6. 4.3.2 The distance from the transverse rope to the edge of the belt shall be 10 to 30mm. 4.3.3 The transverse rope and the longitudinal rope shall be arranged vertically, with a distance of 0.5 to 2mm. 4.4 Fabric core belt cloth layer joints
The number and position of the longitudinal and transverse joints of the core cloth layer shall comply with the requirements of HG/T2194. 4.5 Physical properties
4.5.1 The physical properties of the cover rubber shall comply with the requirements of Table 3. 356
Tensile strength, MPa
Elongation at break, %
Hot air aging performance (70℃×7d)
Abrasion, cm3
HG/T 2577—94
Not less than
Not less than
Tensile strength change rate, %
Elongation at break change rate, %
Not more than
Note: When special use or conveying sharp and abrasive materials is required, the physical properties of the cover rubber shall be agreed upon by the supply and demand parties. The performance of the covering rubber of the heat-resistant (T-type) belt shall comply with the provisions of HG/T2297. 4.5.2 Full thickness tensile properties of fabric core belt: refers to
25～25
4.5.2.1 The longitudinal tensile strength of the belt shall not be less than its nominal value. The specified values of the transverse tensile strength of the tensile strength specification series below 500N/mm are shown in Table 4.Transverse tensile strength of 500N/mm and above is not specified. Table 4
Specification series for longitudinal full-thickness tensile strength
Note: ① The provisions for transverse tensile strength do not apply to cotton canvas core conveyor belts. Transverse full-thickness tensile strength, not less than
② The values in the longitudinal tensile strength specification series in the table can be expanded to lower values according to the R10 priority number system. ③ When it exceeds the provisions in the table, it can be agreed upon by the supply and demand parties. N/mm
4.5.2.2 The full-thickness longitudinal elongation of the belt should be not less than 10%, and the full-thickness longitudinal reference force elongation should be not more than 4%. Note: The reference force is equal to 10% of the nominal full-thickness longitudinal tensile strength of the belt multiplied by the basic value of the width in the middle of the specimen. 4.5.3 The longitudinal tensile strength and wire rope breaking force of the wire rope mesh core belt shall comply with the provisions of Table 2. 4.5.4 The interlayer bonding strength of the fabric core belt shall comply with the provisions of Table 5. Table 5
Fabric categories and items
100% polyamide fabric
Other 100% synthetic fiber fabrics
Average value of longitudinal test specimens
Lowest peak value of all longitudinal test specimens
Average value of longitudinal test specimens
Lowest peak value of all longitudinal test specimens
Not less than
Not less than
Not less than
Between fabric layers
Between covering layer and fabric layer
Thickness of covering layer
Thickness of covering layer
Cotton fiber canvas
HG/T 2577—94
Continued Table 5
Fabric categories and items
Average value of longitudinal test specimens
Lowest peak value of all longitudinal test specimens
Other fabrics containing natural fibers
Average value of longitudinal test specimens
Lowest peak value of all longitudinal test specimens
Not less than
Not less than
Not less than
Between fabric layers
Between cover layer and fabric layer
Thickness of cover layer
Thickness of superior cover layer
The interlayer bonding strength of heat-resistant fabric core belt shall comply with the provisions of HG/T2297. 4.5.4.1
4.5.5The bonding strength between the cover layer and the transverse rope and between the transverse rope and the adjacent layer of the wire rope mesh core belt shall not be less than 12N/mm. The longitudinal rope bonding strength of the wire rope mesh core belt shall comply with the provisions of Table 6. After aging, the bonding strength shall not be less than 85% of the value specified in the table. 4.5.6
Diameter d, mm
3. 1~3. 2
3.3～3.4
4.6 Appearance quality
Bonding strength, N/cm
4.6.1 The appearance quality of the fabric core belt shall comply with the provisions of GB/T526. Rope
The appearance quality of the wire rope mesh core belt shall comply with the provisions of GB/T9770, 4. 6.2
5 Test method
Bonding strength, N/cm
The width and length of the lifting belt and the thickness of the covering layer of the fabric core belt and the total thickness of the belt shall be measured in accordance with GB/T 4490. 5.1
The maximum difference in thickness of the wire rope mesh core belt and the measurement of the covering layer thickness shall be carried out in accordance with GB/T5753. 5.2
5.3 The determination of the edge glue width of the wire rope mesh core belt, the longitudinal rope distance and the eccentricity of the wire rope in the thickness direction shall be carried out in accordance with GB/T 9770.
The tensile performance test of the cover layer of the lifting belt shall be carried out in accordance with GB/T528. 5.5
The wear resistance test of the cover layer shall be carried out in accordance with GB/T 1689. The heat aging performance test of the cover layer shall be carried out in accordance with GB/T3512. The full thickness tensile performance test of the fabric core belt shall be carried out in accordance with GB/T3690. 5.7
The longitudinal full thickness tensile performance test of the wire rope mesh core belt shall be carried out in accordance with GB/T5754. 5.8
The bonding strength test between the cover layer and the transverse rope and between the transverse rope and the adjacent layer of the wire rope mesh core belt shall be carried out in accordance with Appendix A. 5.10
The interlayer bonding strength test of fabric core belt shall be carried out according to Method A in GB/T6759. The wire rope bonding strength test of wire rope mesh core belt shall be carried out according to GB/T5755; the wire rope bonding strength test after aging shall be carried out according to the "hot air heating method" in GB/T5755. 358
6 Inspection rules
HG/T 2577--94
6.1 Before leaving the factory, the lifting belt shall be inspected for appearance quality, length, width, coating thickness and edge glue width. 6.2 A certain number of samples shall be selected from a production batch for factory inspection of the lifting belt. The sampling quantity and requirements shall be implemented in accordance with HG/T2410.
6.3 During factory inspection, the heat aging test of the coating layer and the aging test of the bonding strength of the wire rope may not be carried out. 6.4 Type inspection shall be carried out at least once a year and shall be fully inspected in accordance with the technical requirements specified in this standard. 6.5 If a certain performance does not meet the standard during the inspection, it shall be inspected at the same time. Take double samples from the batch of tapes and retest the unqualified items. If one result still does not meet the standard after the retest, the products of this batch or period are unqualified. 7 Marking, packaging, transportation and storage
7.1 The marking of lifting belts shall be in accordance with GB5752. 7.2 The lifting belt should be wound around the core shaft and tied firmly with a covering. The product name, belt length, model, manufacturer name (or registered trademark) should be marked on the packaging.
7.3 The transportation and storage of lifting belts shall be in accordance with GB/T6757. 359
A1 Instrument
HG/T 2577—94
Appendix A
Method for determining the interlayer bonding strength of wire rope mesh core belt (supplement)
Tensile testing machine that meets the following requirements:
With a drawing device that automatically records the peeling force; a.
b. The clamp running speed can be adjusted to 100±10mm/min; the measurement error is not greater than 1% of the measuring range.
A2 Specimen
A2.1 At least 5 days after the belt is made, cut 2 specimens at a position not less than 50mm away from the edge of the belt and parallel to the axis of the belt. A2.2 All sides of the specimen are rectangular, with a width of 25±0.5mm, a length of 200mm, and a thickness of the full thickness of the belt. A2.3 Use a knife to cut a section from both sides of the specimen close to the wire rope. The length should ensure that the specimen is well clamped in the fixture. . A3 Test procedure
A3.1 The test should be carried out at a temperature of 23±2℃. A3.2 The test peeling length is at least 100mm. A3.3 Clamp the cover rubber in one fixture and clamp the belt core containing the wire rope in another fixture. A3.4 Start the test, the moving fixture runs at a speed of 100±10mm/min, and record the peeling force curve. A4 Result expression
A4.1 According to the peeling force curve, determine the median force, and the ratio of the median force to the width of the specimen is called the bonding strength, and its unit is N/mm. A4.2 The interlayer bonding strength is the average bonding strength of the two specimens, and the value is rounded to 0.1N/mm. Additional remarks:
This standard was proposed by the Technical Supervision Department of the Ministry of Chemical Industry of the People's Republic of China. This standard is under the jurisdiction of Qingdao Rubber Industry Research Institute. This standard was drafted by Shenyang Adhesive Tape General Factory. The main drafters of this standard are Zhuang Yan and Liu Xingjiu. This standard refers to the British standard BS490 Part 2: 1975 "Textile core rubber and plastic lifting belts".4 The interlayer bonding strength of the fabric core tape shall comply with the requirements of Table 5. Table 5
Fabric categories and items
100% polyamide fabric
Other 100% synthetic fiber fabrics
Average value of longitudinal test specimens
Lowest peak value of all longitudinal test specimens
Average value of longitudinal test specimens
Lowest peak value of all longitudinal test specimens
Not less than
Not less than
Not less than
Not less than
Between fabric layers
Between covering layer and fabric layer
Thickness of covering layer
Thickness of covering layer
Cotton fiber canvas
HG/T 2577—94
Continued Table 5
Fabric categories and items
Average value of longitudinal test specimens
Lowest peak value of all longitudinal test specimens
Other fabrics containing natural fibers
Average value of longitudinal test specimens
Lowest peak value of all longitudinal test specimens
Not less than
Not less than
Not less than
Between fabric layers
Between cover layer and fabric layer
Thickness of cover layer
Thickness of superior cover layer
The interlayer bonding strength of heat-resistant fabric core belt shall comply with the provisions of HG/T2297. 4.5.4.1
4.5.5The bonding strength between the cover layer and the transverse rope of the steel wire rope mesh core belt and between the transverse rope and the adjacent layer shall not be less than 12N/mm. The longitudinal rope bonding strength of the steel wire rope mesh core belt shall comply with the provisions of Table 6. After aging, the bonding strength shall not be less than 85% of the value specified in the table. 4.5.6
Diameter d, mm
3. 1~3. 2
3.3～3.4
4.6 Appearance quality
Bonding strength, N/cm
4.6.1 The appearance quality of the fabric core belt shall comply with the provisions of GB/T526. Rope
The appearance quality of the wire rope mesh core belt shall comply with the provisions of GB/T9770, 4. 6.2
5 Test method
Bonding strength, N/cm
The width and length of the lifting belt and the thickness of the covering layer of the fabric core belt and the total thickness of the belt shall be measured in accordance with GB/T 4490. 5.1
The maximum difference in thickness of the wire rope mesh core belt and the measurement of the covering layer thickness shall be carried out in accordance with GB/T5753. 5.2
5.3 The determination of the edge glue width of the wire rope mesh core belt, the longitudinal rope distance and the eccentricity of the wire rope in the thickness direction shall be carried out in accordance with GB/T 9770.
The tensile performance test of the cover layer of the lifting belt shall be carried out in accordance with GB/T528. 5.5
The wear resistance test of the cover layer shall be carried out in accordance with GB/T 1689. The heat aging performance test of the cover layer shall be carried out in accordance with GB/T3512. The full thickness tensile performance test of the fabric core belt shall be carried out in accordance with GB/T3690. 5.7
The longitudinal full thickness tensile performance test of the wire rope mesh core belt shall be carried out in accordance with GB/T5754. 5.8
The bonding strength test between the cover layer and the transverse rope and between the transverse rope and the adjacent layer of the wire rope mesh core belt shall be carried out in accordance with Appendix A. 5.10
The interlayer bonding strength test of fabric core belt shall be carried out according to Method A in GB/T6759. The wire rope bonding strength test of wire rope mesh core belt shall be carried out according to GB/T5755; the wire rope bonding strength test after aging shall be carried out according to the "hot air heating method" in GB/T5755. 358
6 Inspection rules
HG/T 2577--94
6.1 Before leaving the factory, the lifting belt shall be inspected for appearance quality, length, width, coating thickness and edge glue width. 6.2 A certain number of samples shall be selected from a production batch for factory inspection of the lifting belt. The sampling quantity and requirements shall be implemented in accordance with HG/T2410.
6.3 During factory inspection, the heat aging test of the coating layer and the aging test of the bonding strength of the wire rope may not be carried out. 6.4 Type inspection shall be carried out at least once a year and shall be fully inspected in accordance with the technical requirements specified in this standard. 6.5 If a certain performance does not meet the standard during the inspection, it shall be inspected at the same time. Take double samples from the batch of tapes and retest the unqualified items. If one result still does not meet the standard after the retest, the products of this batch or period are unqualified. 7 Marking, packaging, transportation and storage
7.1 The marking of lifting belts shall be in accordance with GB5752. 7.2 The lifting belt should be wound around the core shaft and tied firmly with a covering. The product name, belt length, model, manufacturer name (or registered trademark) should be marked on the packaging.
7.3 The transportation and storage of lifting belts shall be in accordance with GB/T6757. 359
A1 Instrument
HG/T 2577—94
Appendix A
Method for determining the interlayer bonding strength of wire rope mesh core belt (supplement)
Tensile testing machine that meets the following requirements:
With a drawing device that automatically records the peeling force; a.
b. The clamp running speed can be adjusted to 100±10mm/min; the measurement error is not greater than 1% of the measuring range.
A2 Specimen
A2.1 At least 5 days after the belt is made, cut 2 specimens at a position not less than 50mm away from the edge of the belt and parallel to the axis of the belt. A2.2 All sides of the specimen are rectangular, with a width of 25±0.5mm, a length of 200mm, and a thickness of the full thickness of the belt. A2.3 Use a knife to cut a section from both sides of the specimen close to the wire rope. The length should ensure that the specimen is well clamped in the fixture. . A3 Test procedure
A3.1 The test should be carried out at a temperature of 23±2℃. A3.2 The test peeling length is at least 100mm. A3.3 Clamp the cover rubber in one fixture and clamp the belt core containing the wire rope in another fixture. A3.4 Start the test, the moving fixture runs at a speed of 100±10mm/min, and record the peeling force curve. A4 Result expression
A4.1 According to the peeling force curve, determine the median force, and the ratio of the median force to the width of the specimen is called the bonding strength, and its unit is N/mm. A4.2 The interlayer bonding strength is the average bonding strength of the two specimens, and the value is rounded to 0.1N/mm. Additional remarks:
This standard was proposed by the Technical Supervision Department of the Ministry of Chemical Industry of the People's Republic of China. This standard is under the jurisdiction of Qingdao Rubber Industry Research Institute. This standard was drafted by Shenyang Adhesive Tape General Factory. The main drafters of this standard are Zhuang Yan and Liu Xingjiu. This standard refers to the British standard BS490 Part 2: 1975 "Textile core rubber and plastic lifting belts".4 The interlayer bonding strength of the fabric core tape shall comply with the requirements of Table 5. Table 5
Fabric categories and items
100% polyamide fabric
Other 100% synthetic fiber fabrics
Average value of longitudinal test specimens
Lowest peak value of all longitudinal test specimens
Average value of longitudinal test specimens
Lowest peak value of all longitudinal test specimens
Not less than
Not less than
Not less than
Not less than
Between fabric layers
Between covering layer and fabric layer
Thickness of covering layer
Thickness of covering layer
Cotton fiber canvas
HG/T 2577—94
Continued Table 5
Fabric categories and items
Average value of longitudinal test specimens
Lowest peak value of all longitudinal test specimens
Other fabrics containing natural fibers
Average value of longitudinal test specimens
Lowest peak value of all longitudinal test specimens
Not less than
Not less than
Not less than
Between fabric layers
Between cover layer and fabric layer
Thickness of cover layer
Thickness of superior cover layer
The interlayer bonding strength of heat-resistant fabric core belt shall comply with the provisions of HG/T2297. 4.5.4.1
4.5.5The bonding strength between the cover layer and the transverse rope of the steel wire rope mesh core belt and between the transverse rope and the adjacent layer shall not be less than 12N/mm. The longitudinal rope bonding strength of the steel wire rope mesh core belt shall comply with the provisions of Table 6. After aging, the bonding strength shall not be less than 85% of the value specified in the table. 4.5.6
Diameter d, mm
3. 1~3. 2
3.3～3.4
4.6 Appearance quality
Bonding strength, N/cm
4.6.1 The appearance quality of the fabric core belt shall comply with the provisions of GB/T526. Rope
The appearance quality of the wire rope mesh core belt shall comply with the provisions of GB/T9770, 4. 6.2
5 Test method
Bonding strength, N/cm
The width and length of the lifting belt and the thickness of the covering layer of the fabric core belt and the total thickness of the belt shall be measured in accordance with GB/T 4490. 5.1
The maximum difference in thickness of the wire rope mesh core belt and the measurement of the covering layer thickness shall be carried out in accordance with GB/T5753. 5.2
5.3 The determination of the edge glue width of the wire rope mesh core belt, the longitudinal rope distance and the eccentricity of the wire rope in the thickness direction shall be carried out in accordance with GB/T 9770.
The tensile performance test of the cover layer of the lifting belt shall be carried out in accordance with GB/T528. 5.5
The wear resistance test of the cover layer shall be carried out in accordance with GB/T 1689. The heat aging performance test of the cover layer shall be carried out in accordance with GB/T3512. The full thickness tensile performance test of the fabric core belt shall be carried out in accordance with GB/T3690. 5.7
The longitudinal full thickness tensile performance test of the wire rope mesh core belt shall be carried out in accordance with GB/T5754. 5.8
The bonding strength test between the cover layer and the transverse rope and between the transverse rope and the adjacent layer of the wire rope mesh core belt shall be carried out in accordance with Appendix A. 5.10
The interlayer bonding strength test of fabric core belt shall be carried out according to Method A in GB/T6759. The wire rope bonding strength test of wire rope mesh core belt shall be carried out according to GB/T5755; the wire rope bonding strength test after aging shall be carried out according to the "hot air heating method" in GB/T5755. 358
6 Inspection rules
HG/T 2577--94
6.1 Before leaving the factory, the lifting belt shall be inspected for appearance quality, length, width, coating thickness and edge glue width. 6.2 A certain number of samples shall be selected from a production batch for factory inspection of the lifting belt. The sampling quantity and requirements shall be implemented in accordance with HG/T2410.
6.3 During factory inspection, the heat aging test of the coating layer and the aging test of the bonding strength of the wire rope may not be carried out. 6.4 Type inspection shall be carried out at least once a year and shall be fully inspected in accordance with the technical requirements specified in this standard. 6.5 If a certain performance does not meet the standard during the inspection, it shall be inspected at the same time. Take double samples from the batch of tapes and retest the unqualified items. If one result still does not meet the standard after the retest, the products of this batch or period are unqualified. 7 Marking, packaging, transportation and storage
7.1 The marking of lifting belts shall be in accordance with GB5752. 7.2 The lifting belt should be wound around the core shaft and tied firmly with a covering. The product name, belt length, model, manufacturer name (or registered trademark) should be marked on the packaging.
7.3 The transportation and storage of lifting belts shall be in accordance with GB/T6757. 359
A1 Instrument
HG/T 2577—94
Appendix A
Method for determining the interlayer bonding strength of wire rope mesh core belt (supplement)
Tensile testing machine that meets the following requirements:
With a drawing device that automatically records the peeling force; a.
b. The clamp running speed can be adjusted to 100±10mm/min; the measurement error is not greater than 1% of the measuring range.
A2 Specimen
A2.1 At least 5 days after the belt is made, cut 2 specimens at a position not less than 50mm away from the edge of the belt and parallel to the axis of the belt. A2.2 All sides of the specimen are rectangular, with a width of 25±0.5mm, a length of 200mm, and a thickness of the full thickness of the belt. A2.3 Use a knife to cut a section from both sides of the specimen close to the wire rope. The length should ensure that the specimen is well clamped in the fixture. . A3 Test procedure
A3.1 The test should be carried out at a temperature of 23±2℃. A3.2 The test peeling length is at least 100mm. A3.3 Clamp the cover rubber in one fixture and clamp the belt core containing the wire rope in another fixture. A3.4 Start the test, the moving fixture runs at a speed of 100±10mm/min, and record the peeling force curve. A4 Result expression
A4.1 According to the peeling force curve, determine the median force, and the ratio of the median force to the width of the specimen is called the bonding strength, and its unit is N/mm. A4.2 The interlayer bonding strength is the average bonding strength of the two specimens, and the value is rounded to 0.1N/mm. Additional remarks:
This standard was proposed by the Technical Supervision Department of the Ministry of Chemical Industry of the People's Republic of China. This standard is under the jurisdiction of Qingdao Rubber Industry Research Institute. This standard was drafted by Shenyang Adhesive Tape General Factory. The main drafters of this standard are Zhuang Yan and Liu Xingjiu. This standard refers to the British standard BS490 Part 2: 1975 "Textile core rubber and plastic lifting belts".8
The bond strength test between the cover layer and the transverse rope and between the transverse rope and the adjacent layer of the wire rope mesh core belt shall be carried out in accordance with Appendix A. 5.10
The bond strength test between the layers of the fabric core belt shall be carried out in accordance with Method A in GB/T6759. The bond strength test of the wire rope of the wire rope mesh core belt shall be carried out in accordance with GB/T5755; the bond strength test of the wire rope after aging shall be carried out in accordance with the "hot air heating method" in GB/T5755. 358
6 Inspection rules
HG/T 2577--94
6.1 Before leaving the factory, the lifting belt shall be inspected for appearance quality, length, width, coating thickness and edge glue width. 6.2 A certain number of samples shall be selected from a production batch for factory inspection of the lifting belt. The sampling quantity and requirements shall be implemented in accordance with HG/T2410.
6.3 During factory inspection, the heat aging test of the coating layer and the aging test of the bonding strength of the wire rope may not be carried out. 6.4 Type inspection shall be carried out at least once a year and shall be fully inspected in accordance with the technical requirements specified in this standard. 6.5 If a certain performance does not meet the standard during the inspection, it shall be inspected at the same time. Take double samples from the batch of tapes and retest the unqualified items. If one result still does not meet the standard after the retest, the products of this batch or period are unqualified. 7 Marking, packaging, transportation and storage
7.1 The marking of lifting belts shall be in accordance with GB5752. 7.2 The lifting belt should be wound around the core shaft and tied firmly with a covering. The product name, belt length, model, manufacturer name (or registered trademark) should be marked on the packaging.
7.3 The transportation and storage of lifting belts shall be in accordance with GB/T6757. 359
A1 Instrument
HG/T 2577—94
Appendix A
Method for determining the interlayer bonding strength of wire rope mesh core belt (supplement)
Tensile testing machine that meets the following requirements:
With a drawing device that automatically records the peeling force; a.
b. The clamp running speed can be adjusted to 100±10mm/min; the measurement error is not greater than 1% of the measuring range.
A2 Specimen
A2.1 At least 5 days after the belt is made, cut 2 specimens at a position not less than 50mm away from the edge of the belt and parallel to the axis of the belt. A2.2 All sides of the specimen are rectangular, with a width of 25±0.5mm, a length of 200mm, and a thickness of the full thickness of the belt. A2.3 Use a knife to cut a section from both sides of the specimen close to the wire rope. The length should ensure that the specimen is well clamped in the fixture. . A3 Test procedure
A3.1 The test should be carried out at a temperature of 23±2℃. A3.2 The test peeling length is at least 100mm. A3.3 Clamp the cover rubber in one fixture and clamp the belt core containing the wire rope in another fixture. A3.4 Start the test, the moving fixture runs at a speed of 100±10mm/min, and record the peeling force curve. A4 Result expression
A4.1 According to the peeling force curve, determine the median force, and the ratio of the median force to the width of the specimen is called the bonding strength, and its unit is N/mm. A4.2 The interlayer bonding strength is the average bonding strength of the two specimens, and the value is rounded to 0.1N/mm. Additional remarks:
This standard was proposed by the Technical Supervision Department of the Ministry of Chemical Industry of the People's Republic of China. This standard is under the jurisdiction of Qingdao Rubber Industry Research Institute. This standard was drafted by Shenyang Adhesive Tape General Factory. The main drafters of this standard are Zhuang Yan and Liu Xingjiu. This standard refers to the British standard BS490 Part 2: 1975 "Textile core rubber and plastic lifting belts".8
The bond strength test between the cover layer and the transverse rope and between the transverse rope and the adjacent layer of the wire rope mesh core belt shall be carried out in accordance with Appendix A. 5.10
The bond strength test between the layers of the fabric core belt shall be carried out in accordance with Method A in GB/T6759. The bond strength test of the wire rope of the wire rope mesh core belt shall be carried out in accordance with GB/T5755; the bond strength test of the wire rope after aging shall be carried out in accordance with the "hot air heating method" in GB/T5755. 358
6 Inspection rules
HG/T 2577--94
6.1 Before leaving the factory, the lifting belt shall be inspected for appearance quality, length, width, coating thickness and edge glue width. 6.2 A certain number of samples shall be selected from a production batch for factory inspection of the lifting belt. The sampling quantity and requirements shall be implemented in accordance with HG/T2410.
6.3 During factory inspection, the heat aging test of the coating layer and the aging test of the bonding strength of the wire rope may not be carried out. 6.4 Type inspection shall be carried out at least once a year and shall be fully inspected in accordance with the technical requirements specified in this standard. 6.5 If a certain performance does not meet the standard during the inspection, it shall be inspected at the same time. Take double samples from the batch of tapes and retest the unqualified items. If one result still does not meet the standard after the retest, the products of this batch or period are unqualified. 7 Marking, packaging, transportation and storage
7.1 The marking of lifting belts shall be in accordance with GB5752. 7.2 The lifting belt should be wound around the core shaft and tied firmly with a covering. The product name, belt length, model, manufacturer name (or registered trademark) should be marked on the packaging.
7.3 The transportation and storage of lifting belts shall be in accordance with GB/T6757. 359
A1 Instrument
HG/T 2577—94
Appendix A
Method for determining the interlayer bonding strength of wire rope mesh core belt (supplement)
Tensile testing machine that meets the following requirements:
With a drawing device that automatically records the peeling force; a.
b. The clamp running speed can be adjusted to 100±10mm/min; the measurement error is not greater than 1% of the measuring range.
A2 Specimen
A2.1 At least 5 days after the belt is made, cut 2 specimens at a position not less than 50mm away from the edge of the belt and parallel to the axis of the belt. A2.2 All sides of the specimen are rectangular, with a width of 25±0.5mm, a length of 200mm, and a thickness of the full thickness of the belt. A2.3 Use a knife to cut a section from both sides of the specimen close to the wire rope. The length should ensure that the specimen is well clamped in the fixture. . A3 Test procedure
A3.1 The test should be carried out at a temperature of 23±2℃. A3.2 The test peeling length is at least 100mm. A3.3 Clamp the cover rubber in one fixture and clamp the belt core containing the wire rope in another fixture. A3.4 Start the test, the moving fixture runs at a speed of 100±10mm/min, and record the peeling force curve. A4 Result expression
A4.1 According to the peeling force curve, determine the median force, and the ratio of the median force to the width of the specimen is called the bonding strength, and its unit is N/mm. A4.2 The interlayer bonding strength is the average bonding strength of the two specimens, and the value is rounded to 0.1N/mm. Additional remarks:
This standard was proposed by the Technical Supervision Department of the Ministry of Chemical Industry of the People's Republic of China. This standard is under the jurisdiction of Qingdao Rubber Industry Research Institute. This standard was drafted by Shenyang Adhesive Tape General Factory. The main drafters of this standard are Zhuang Yan and Liu Xingjiu. This standard refers to the British standard BS490 Part 2: 1975 "Textile core rubber and plastic lifting belts".
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