This standard specifies the technical requirements, inspection methods, inspection rules, marking, packaging, storage and transportation of oil-resistant protective shoes. This standard applies to oil-resistant protective shoes. GB 16756-1997 General Technical Requirements for Oil-Resistant Protective Shoes GB16756-1997 Standard Download Decompression Password: www.bzxz.net

GB16756-1997
This standard was drafted according to the national standard formulation and revision plan project issued by the State Bureau of Technical Supervision in 1994. The drafting standard is mainly based on ISO/DIS8782-1:1994 "Technical Specifications and Test Methods for Safety Shoes, Protective Shoes and Work Shoes" Chapters 48, 9 and 5, 19, which are consistent with its main content and belong to equivalent adoption. When drafting the standard, considering the coordination and feasibility of the standard, the physical and mechanical performance requirements and test methods of shoes still use the relevant Chinese footwear standards.
This standard was proposed by the Ministry of Labor of the People's Republic of China. This standard is under the jurisdiction of the National Technical Committee for Standardization of Labor Protection Products. The responsible drafting units of this standard are: Safety and Environmental Protection Research Institute of the Ministry of Metallurgy, and Development Department of the Military Equipment Research Institute of the General Logistics Department. The main drafters of this standard are Yu Qiyuan, Li Qinhua, Pang Yongbao, Zhou Guotai, Yang Tingxin, and Li Jianguo. 309
National Standard of the People's Republic of China
General technical requirements for oil resistant protective footwear
General technical requirementsfor oil resistant protective footwearGB 16756—1997
This standard specifies the technical requirements, inspection methods, inspection rules, marking, packaging, storage and transportation of oil resistant protective footwear. This standard applies to oil resistant protective footwear.
2 Cited standards
The provisions contained in the following standards constitute the provisions of this standard through reference in this standard. When this standard is published, the versions shown are valid. All standards will be revised, and parties using this standard should explore the possibility of using the latest versions of the following standards. GB/T528--92 Determination of tensile properties of vulcanized rubber and thermoplastic rubber GB1689-82 Determination of wear resistance of vulcanized rubber (using Akron abrasion machine) GB 2828--87
Batch inspection counting sampling procedures and sampling tables (applicable to inspection of continuous batches) Periodic inspection counting sampling procedures and sampling tables (applicable to inspection of production process stability) GB 2829-87
GB 3293-82
China shoe size and shoe planting series
GB/T 3903. 1--94
General inspection method for footwear
Folding test method
GB/T 3903. 2--94
GB/T 3903.3-94
GB/T 3903.4-94
GB 4385-1995
GB 12011-89
GB 12015--89
GB 12017--89
GB 12623—90
Test method for wear resistance
General test method for footwear
General test method for footwearTest method for peel strengthGeneral test method for footwearTest method for hardnessTechnical requirements for anti-static shoes and conductive shoes
Insulated leather shoes
Low-voltage insulating rubber shoes
Technical conditions and test methods for puncture-resistant shoesGeneral technical conditions for protective shoes
LD 50--941
Safety shoes (boots) with toe protection
3 Technical requirements
3.1 Shoe size and shoe planter shall comply with the requirements of GB3293. 3.2 Upper height
The height of the upper varies greatly due to different national customs and should be based on the agreement between the buyer and the seller. This standard only specifies the minimum size: high-waist shoes should not be less than 100mm, half-length boots should not be less than 165mm, and high-cut boots should not be less than 330mm. 3.3 Outsole
3.3.1 The thickness of the outsole should comply with the provisions of GB12623. 3.3.2 Folding resistance
Approved by the State Administration of Technical Supervision on March 14, 1997
Implementation on October 1, 1997
GB 16756--1997
Continuously flexed 40,000 times, the length of the crack should not exceed 12mm. 3.3.3 Wear resistance
a) Wear mark length is not more than 10 mm (applicable to leather shoes); b) Wear loss is not more than 1.9 cm2/1.61 km (applicable to rubber shoes). 3.3.4 Shore (A) hardness 50~~72.
3.3.5 Rubber breaking strength ≥9 MPa.
3.3.6 Rubber breaking elongation ≥400%.
3.4 ​​Shoe peeling strength ≥59 N/cm.
3.5 Oil resistance
When tested according to 4.6, the volume increase is not more than 12%. If the volume does not increase, but decreases, and the reduction is greater than 0.5% of the original volume or the hardness increases by more than 10 (parts A), re-sample and test according to 4.8.4. According to GB/T3903.1, the crack growth after 40,000 flexion times is not more than 7 mm.
3.6 Other protective properties
Oil-resistant protective shoes that need to protect toes, prevent puncture, prevent static electricity and electrical insulation should comply with the relevant national (industry) standards such as LD50, GB4385 and GB12011GB12015. 4 Inspection methods
4.1 Upper height measurement method
Measure from the bottom of the middle seam of the inner back upper to the edge with a steel ruler and record to 1 mm. 4.2 Sole thickness measurement method
Measure with a vernier caliper (accuracy ±0.02mm) and take one decimal place. 4.3 Outsole folding resistance inspection method
Perform in accordance with GB/T3903.1, with a pre-cut of 5mm. 4.4 Outsole wear resistance inspection method
Leather shoes shall be carried out in accordance with GB/T3903.2, and rubber shoes shall be carried out in accordance with GB1689. 4.5 Shoe peel strength test method
Perform according to GB/T3903.3.
4.6 Shoe sole Shore A hardness measurement method
Perform according to GB/T3903.4.
4.7 Rubber tear strength and tear elongation test method Perform according to GB/T528.
4.8 Oil resistance test method
4.8.1 Test solution
2,2,4-trimethylpentane (chemically pure). 4.8.2 Sample preparation
Cut two test pieces with a diameter of 16mm and a thickness of 4mm±0.5mm from the outer sole of the shoe (boot). 4.8.3 Method
Weigh each test piece in air (m), then put the test piece into a glass bottle containing a known amount of steamed stuffing water, and weigh the mass of the test piece in the distilled water (m2). Make sure to remove all bubbles and weigh accurately to milligrams. Take out the test piece and use filter paper or non-flannel fabric to absorb the moisture on the test piece. Each test piece is placed in a covered glass container containing the test solution. The test solution should keep the test piece completely immersed. If the density of the test piece is lower than the density of the test solution, use a tool to make the test piece completely below the liquid surface. The container should be tightly covered and protected from light. Place it in an environment of 20℃±2C. Take out the test piece after 22h±0.25h and wipe the test solution remaining on the test piece with filter paper or non-flannel fabric. Then immediately put each test piece into a bottle with a lid that has been weighed and weighed, and weigh its mass (m3) in the air, accurate to milligrams. Then take out the test piece from the bottle and immediately put it into a bottle with a lid that has been weighed and weighed and filled with distilled water, and weigh its mass (㎡) in distilled water. Take out the test piece from the test solution, and the transfer time each time shall not exceed 30s. The volume change is calculated according to formula (1):
(ms - mg). (mi - mz)
× 100
Initial mass of the test piece in air;
Wherein: mi--
Initial mass of the test piece in water;
Mass of the test piece in air after immersion in the test solution;Mass of the test piece in water after immersion in the test solution.
The test result is the average of the two test pieces. (1)
If the volume reduction is greater than 0.5% of the original volume or the hardness (Shore A) increases by more than 10, resampling should be carried out according to the provisions of 4.8.4.
4.8.4 Oil resistance test method when volume is reduced or hardness is increased Cut a test piece with a width of 25mm, a length of 150mm, and a thickness of 3mm±0.2mm from the outer bottom, put it in a container of 2,2,4-trimethylpentane (chemically pure) test solution, cover it tightly, and place it in an environment of 20℃±2℃ for 22h±0.25h. Then take out the test piece, wipe it dry with filter paper or non-lint textile, and then perform flexion test according to GB/T3903.1. 5 Inspection rules
5.1 Factory inspection
The quality inspection department of the manufacturer shall conduct the normal inspection and sampling plan as specified in GB2828, with the same batch of materials and the same process for 1 to 2 days as one batch, but the maximum batch shall not exceed 3,000 pairs, and the sample size shall be randomly selected according to the provisions of Table 2 and Table 3 in GB2828. The inspection items, inspection level, unqualified classification, qualified quality level (AQL), ​​and judgment array shall be carried out according to the requirements of Table 1. Table 1 Factory inspection
Inspection items
Upper height
Outsole thickness
Oil resistance of sole
5.2 Type inspection
Inspection level
When any of the following factors occurs-Type inspection should be carried out: when the enterprise declares a new product;
b) when the product is stopped for more than half a year and then resumes production; Unqualified classification
When the product structure, material, and process have undergone major changes and may affect the performance of the product; c)
When the national product quality supervision agency requires type inspection; e) After normal production, the annual periodic inspection. Qualified quality level
Judgment array
Type inspection shall be carried out by the nationally recognized labor protection product quality supervision and inspection department according to the one-time sampling plan specified in GB2829. Random sampling from qualified batches, sample size, inspection items, discrimination level, unqualified classification, unqualified quality level (RQL) and judgment array, shall be carried out in accordance with the provisions of Table 2.
Upper height
Outsole thickness
Inspection itemswww.bzxz.net
Outsole folding resistance
Outsole wear resistance
Outsole hardness
Shoe peeling strength
Tear strength
Tear elongation
Oil resistance
6 Product marking, packaging, storage and transportation
6.1 Marking includes:
a) manufacturer name and address,
b) product name and standard code;
c) trademark;
d) product specification model;
e) production batch number or production date.
6.2 Packaging
GB16756-1997
Table 2 Type inspection
Discrimination level
Unqualified classification
Unqualified quality level
Discrimination array
6.2.1 Products should be packaged according to classification, model and specification, and the contents specified in 6.1 should be included on the packaging (box or box). 6.2.2 Documents accompanying product packaging:
Product certificate;
b) Product manual,
c) Relevant technical information.
6.3 Storage
6.3.1 It should be placed in a ventilated, dry, mildew-proof and insect-proof place. 6.3.2 Within 2 years from the date of production, the quality should meet the requirements specified in Chapter 4. Shoes that have been stored for more than 2 years should be sampled at 2%. If there are less than 1,000 pairs, 2 pairs should be sampled. The inspection items are oil resistance, outer sole folding resistance, outer sole wear resistance, and shoe peeling strength. They can only be sold and used after passing the inspection.
6.4 Transportation
Should be protected from rain and moisture, and should not be mixed with chemicals such as acids and alkalis. 313
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