Some standard content:
National Standard of the People's Republic of China
Amino Molding
Materials
Plastics-Aminoplastic molding materials-Specification
This standard refers to the international standard ISO2112 "Plastics-Aminoplastic Molding Materials Specification" 》. 1 Subject content and scope of application
GB13454-92
This standard specifies the technical requirements, test methods, inspection rules and marking, packaging, transportation and storage requirements for amino molding compounds. This standard applies to amino molding compounds made of urea-formaldehyde resin or melamine-formaldehyde resin as the base material, cellulose and minerals as fillers, and adding lubricants, hardeners, pigments and other additives. 2 Reference standards
Plastic density and relative density test method
GB1033
GB1034 water absorption test method
GB1043
GB1408
GB1409| |tt||GB1410
GB1411
GB1634
GB1636
GB2406
GB2407
GB2918
GB3403||tt ||GB4207
Plastic simply supported beam impact test method
Test method for power frequency breakdown strength and withstand voltage of solid electrical insulation materials Relative dielectric properties of solid electrical insulation materials at power frequency, audio frequency and high frequency Test method for coefficient and dielectric loss tangent Test method for insulation resistance, volume resistivity and surface resistivity of solid electrical insulating materials Test method for high voltage and small current intermittent arc resistance of solid electrical insulating materials Test method for plastic bending load thermal deformation temperature (referred to as thermal deformation temperature) Test method for apparent density of molding materials
Test method for plastic combustion performance
Oxygen index method
Test method for plastic combustion performance Red hot rod method Standard environmental amino mold for condition conditioning and testing of plastic specimens Plastic naming
Method for determination of tracking index and tracking resistance index of solid insulating materials under humid conditions GB5009.61
Hygienic standard for melamine molded products
GB5471|| tt | Bending test method
Method for determination of volatiles of amino molding compounds
GB/T13455
3 product classifications
Amino molding compound products are named according to the GB3403 classification, and their categories, models and The main uses are shown in Table 1. State Bureau of Technical Supervision approved on 1992-04-29 and implemented on 1993-04-01
Category
UF
MF
Model
UF1P-A|| tt||UF1G-A
UF1P-C
UF1G-C
UF5P-C
UF1T-A
UF1P-E||tt| |UF1G-E
MF1P-A
MF1P-B
MF1P-C
MF4P-C
MF4G-C
MF -PB
MF1G-E
4 technical requirements
main filler
wood pulp, cotton pulp
wood
powder||tt ||Wood pulp, cotton pulp
Wood pulp, cotton pulp
Wood pulp, cotton pulp
Asbestos, refined cotton
Aluminum hydroxide
None
Wood pulp, cotton pulp
GB13454-92
Table 1 Categories, models and uses of amino molding compounds Main uses
Daily necessities, bottle caps, mechanical parts, Molded parts Daily appliances, insulation structural parts of instruments, low-voltage electrical appliances and other molded parts Various buttons and decorative parts
Flame retardant materials are suitable for molding various types of parts, and are more suitable for electrical appliances, Building materials parts, mechanical parts, instruments, clocks and other molded parts can be molded into various eating utensils that are resistant to hot water, high temperature, acid, alkali, oil, poor heat transfer and non-toxic, and are used in daily appliances and low-voltage electrical appliances. , used for insulating arc-resistant parts of explosion-proof motors and electrical appliances. Used to cover the surface of thermosetting plastic products. Used to eliminate residual plastic in epoxy silicone plastic packaging of transistors, integrated circuits, etc. in the electronics industry. The technical requirements for amino molding compounds for cleaning molds should comply with the table. 2 regulations. GB13454—92
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5 test method
5.1 Sample preparation
GB13454-92
Prepare using the method specified in GB5471, and recommend the molding conditions listed in Table 3. Amino molding compound can be preheated. The recommended preheating conditions for MF4P-C are: 105~115℃, 5~10min. Table 3 Molding Conditions
Fan
Type
Paint
No.
UF1P-A
UF1G-A
UF1P-C
UF1G-C
UF1T-A
UF5P-C
UFIP-E
UF1G-E
MF1P- A
MF1P-C
MF1P-B
MF4G-C
MF1G-E
MF4P-C
bar||tt ||pieces
mold temperature
140~150
150~160
160~170
2 sample size, quantity, state adjustment and The test environment is shown in Table 4. 5.2
pressure
strong
MPa
25~40
25~40
35~45
curing time
min/mm
0.5~1.0
0.5~1.0
1.5~2.5
Test item
Test
Head
boiling water resistance
bentwwW.bzxz.Net
curved
strong
impact strength
notched
GB13454—92|| tt||Table 4 Sample size, quantity, condition adjustment and test environment Sample size
mm
(100±1)×(3±0.2)
(120± 1) × (10 ± 0.2) X × (4 ± 0.2) Shuqu | | tt | | 2 | | tt | | Status adjustment | )%/16h or more
No notch (120±1)×(15±0.2)×(10±0.2) heat distortion temperature
water absorption
cold water
Hot water
Molding shrinkage
Post shrinkage
Extractable formaldehyde
24h in water
Post insulation resistance
Dielectric strength
Tracking resistance index
Dielectric loss tangent
Incandescent resistance
Arc resistance
Oxygen index
($50±1) ×(3±0.2)
(120±1)×(15±0.2)×(10±0.2)2 Parts with a volume of 150~250cm
(75±1)×(50 ±1) )×(10±0.2)×(4±0.2)($100±1)×(3±0.2)
3
(150±1)×(6.5±0.2)×(3± 0.2) 55.3 Determination of fluidity (Laxico)
shall be measured using the method specified in Appendix B of this standard. 5.4 Determination of volatile matter
Room temperature/more than 16h
50±2℃, dry for 24±1h
Cool to room temperature
Test environment
23± 2℃/(50±5)%
Room temperature
23±2C/(50±5)%
Room temperature/more than 8h
23±2C/(50 ±5)%/24h
Above, 23±2C distilled water
24±1h, take out and dry
23±2℃/(50±5)%/24h| |tt||above
room temperature/above 16h
room temperature
23±2C/(50±5)%
room temperature
23±2C/ (50±5)%
Room temperature
is measured using the method specified in GB/T13455. The drying temperature is 105±2℃, and the drying time is 0.5h. 5.5 Determination of appearance
Perform visual inspection against the standard sample.
The standard sample shall be agreed upon by both parties of supply and demand.
5.6 Determination of boiling water resistance
Use the method specified in Appendix C of this standard to measure. 5.7 Determination of bending strength
shall be measured using the method specified in GB9341. 5.8 Determination of impact strength
shall be measured using the method specified in GB1043. The notch of the specimen is processed by molding method. 5.9 Determination of heat distortion temperature
GB13454-92
Use the method specified in GB1634 for measurement. The bending stress is 1.80MPa. 5.10 Determination of water absorption
Use the method specified in GB1034 to measure, among which method 1 is used to measure cold water absorption, and method 3 is used to measure hot water absorption. 5.11 Determination of molding shrinkage
shall be measured using the method specified in Appendix A of this standard. 5.12 Determination of extractable formaldehyde
shall be determined using the method specified in GB5009.61. The samples are prepared using the method specified in Appendix C of this standard. 5.13 Measurement of insulation resistance after 24 hours in water
shall be measured using the method specified in GB1410 medium high resistance meter method and electrode type (4). 5.14 Determination of dielectric strength
shall be measured using the method specified in GB1408, using the 20s step-by-step voltage boosting method. 5.15 Determination of tracking resistance index
Use the method specified in GB4207 for measurement. Five test points are measured on the sample. The distance between points is not less than 30mm, and the distance between points and the edge of the sample is not less than 30mm. The distance is not less than 10mm. 5.16 The dielectric loss tangent (tan8) (MHz) is measured using the two-electrode method specified in GB1409. 5.17 Determination of incandescent heat resistance
shall be measured using the method specified in GB2407. 5.18 Determination of arc resistance
shall be measured using the method specified in GB1411. 5.19 Determination of oxygen index
shall be determined using the method specified in GB2406. 6 Inspection Rules
6.1 Products of the same model produced on the same production line, the same raw materials, the same process conditions, and one shift are considered to be one batch. 6.2 Sampling shall be carried out in accordance with the provisions of Table 2 of Article 6.6 of GB6678 and Article 2.3 of GB6679. The sample size is not less than 2kg. 6.3 Each batch of products must be inspected by the quality inspection department of the manufacturer. The manufacturer should ensure that the products shipped meet the requirements specified in this standard.
6.4 The factory inspection items are shown in Table 5. Other items are random inspection items. The random inspection items shall be carried out at least once every 10 days. Type inspection shall be carried out in accordance with the provisions of Article 6.6.1 in GB1.3.
Category
UF
MF
Model
UF1P-A
UF1G-A
UF1P-C|| tt||UF1G-C
UF5P-C
UF1T-A
UFIP-E
UF1G-E
MF1P-A||tt| |MF1P-C
MF1P-B
MF4P-C
MF4G-C
MF-PB
MF1G-E
GB .13454—92
Factory inspection items for various types of amino molding compounds Table 5
Factory inspection items
Fluidity, volatile matter, appearance, boiling water resistance, impact strength (notch) fluidity , volatile matter, appearance, boiling water resistance, impact strength (notch), dielectric strength fluidity, volatile matter, appearance, boiling water resistance, impact strength (notch) fluidity, volatile matter, appearance, boiling water resistance, impact strength notch), dielectric strength, oxygen index fluidity, volatile matter, appearance, boiling water resistance, impact strength (notch) fluidity, volatile matter, appearance, boiling water resistance, impact strength (notch), dielectric strength fluidity, Volatile matter, appearance, boiling water resistance, impact strength (notched), extractable formaldehyde flowability, appearance, impact strength (notched) (unnotched), dielectric strength, arc flow resistance, volatile matter, appearance, boiling water resistance , impact strength (notch), dielectric strength, arc resistance, oxygen index appearance, boiling water resistance, extractable formaldehyde
Flowability, volatiles, appearance, molding shrinkage 6.5 The user has the right The received products shall be inspected within one month according to the methods specified in this standard. 6.6 When the inspection results show that a certain technical requirement does not meet the requirements of this standard, samples should be taken from twice the packaging bags of the batch of products and the unqualified items should be re-inspected. Grade based on retest results. 6.7 When the supply and demand parties have objections to the quality of the product, it shall be resolved through negotiation between the two parties, or arbitration shall be conducted by the statutory quality inspection department. Marking, packaging, transportation, storage
7
7.1 Marking
There should be a clear and firm mark on the package, indicating the product name, trademark, model, grade, batch number, and production date. and manufacturer name. 7.2 Packaging
Products should be packed in iron barrels, wooden barrels, paper barrels, and woven silk bags lined with plastic bags. The plastic bags should be sealed. Each package must be accompanied by a certificate of conformity.
Transportation
7.3
Products should be protected from moisture, heat, dirt and packaging damage during transportation. This product is not a dangerous product.
7.4 Storage
7.4.1 The product should be stored in a ventilated, dry and cool room, with the temperature not exceeding 35℃. 7.4.2 The storage period of the product should be one year from the date of manufacture for iron drum packaging and half a year for wooden drums, paper drums and woven silk bags. If the product exceeds the storage period, it should be inspected item by item in accordance with the provisions of this standard. Qualified products can still be used. GB13454--92
Appendix A
Determination of molding shrinkage and post-shrinkage
(Supplement)
This supplement adopts the international standard ISO2577 "Plastics" — Thermosetting molding compounds — Determination of shrinkage. This supplement specifies the method for determining the molding shrinkage of amino molding compounds and the shrinkage after heat treatment. A1 definition
A1.1 Mold shrinkage: the relative difference between the length of the molded sample and the measured length of the mold cavity. A1.2 Post-shrinkage rate: the relative difference between the length of the molded sample and the length of the sample after being treated at a certain temperature. A2 equipment
A2.1 Vernier caliper: Vernier reading value is 0.02mm. A2.2 oven: temperature control accuracy ±2°C.
A3 specimen
The length of the specimen is 120±1mm, the width is 15±0.2mm, and the thickness is 10±0.2mm. There are two specimens in each group. A4 Test Steps
A4.1 Measure the length of the mold cavity after being adjusted to a temperature of 23 ± 2°C for 24 hours, accurate to 0.02mm. Measure at least once every three months. A4.2 Molding Shrinkage: Measure the length of the sample adjusted to a temperature of 23±2°C, a relative humidity of 50±5%, and a time of 16 to 24 hours, accurate to 0.02mm. Take the average of the two measurements. A4.3 Post-shrinkage
A4.3.1 Test temperature: UF molding compound is 80±2℃, MF molding compound is 110±3℃. A4.3.2 Place the sample measured in A4.2 into the oven (A2.2) at the specified test temperature for 48 ± 1 hour. After the treatment is completed, place the sample in a temperature of 23 ± 2°C and a relative humidity of 50 Place it in an environment of ±5% for 3 hours, and measure the length of the sample to an accuracy of 0.02mm. Take the arithmetic mean of the two measurements.
A5 result expression
A5.1 molding shrinkage is calculated according to formula (A1): M,
where: M,-molding shrinkage, %;||tt ||L. The length of the mold cavity, mm;
L,—the length of the sample, mm.
The post-shrinkage rate of A5.2 is calculated according to formula (A2):
Where: Ps - post-shrinkage rate, %;
L - length of the sample, mm;| |tt||P,
L
L
Length of strip after treatment, mm. (A1)
(A2)
GB13454-92
A5.3 The test results are expressed as the arithmetic mean of two samples. A6 Test report
The test report should include the following content:
Indicate that it is in accordance with this supplement;
a.
b.
c.|| tt||Indicate the model and batch number of the sample tested;
Test results.
Appendix B
Method for determination of fluidity of amino molding compounds (Lasigo) (supplement)
This supplement specifies the determination of a certain mass of amino molding compounds within a specified time. , temperature and pressure conditions, the length extruded from the standard die hole is the fluidity (Laxico) method.
B1 test equipment
B1.1 preform mold: diameter 28±1mm, height 10±1mm. B1.2 Laxico flow mold: The mold specifications are shown in Figure B1, and the roughness of the mold groove part is R.=0.20μm.2) for 48 ± 1 hour. After the treatment is completed, place the sample in an environment with a temperature of 23 ± 2°C and a relative humidity of 50 ± 5%. Leave it for 3 hours and measure the length of the sample to an accuracy of 0.02mm. Take the arithmetic mean of the two measurements.
A5 result expression
A5.1 molding shrinkage is calculated according to formula (A1): M,
where: M,-molding shrinkage, %;||tt ||L. The length of the mold cavity, mm;
L,—the length of the sample, mm.
The post-shrinkage rate of A5.2 is calculated according to formula (A2):
Where: Ps - post-shrinkage rate, %;
L - length of the sample, mm;| |tt||P,
L
L
Length of strip after treatment, mm. (A1)
(A2)
GB13454-92
A5.3 The test results are expressed as the arithmetic mean of two samples. A6 Test report
The test report should include the following content:
Indicate that it is in accordance with this supplement;
a.
b.
c.|| tt||Indicate the model and batch number of the sample tested;
Test results.
Appendix B
Method for determination of fluidity of amino molding compounds (Lasigo) (supplement)
This supplement specifies the determination of a certain mass of amino molding compounds within a specified time. , temperature and pressure conditions, the length extruded from the standard die hole is the fluidity (Laxico) method.
B1 test equipment
B1.1 preform mold: diameter 28±1mm, height 10±1mm. B1.2 Laxico flow mold: The mold specifications are shown in Figure B1, and the roughness of the mold groove part is R.=0.20μm.2) for 48 ± 1 hour. After the treatment is completed, place the sample in an environment with a temperature of 23 ± 2°C and a relative humidity of 50 ± 5%. Leave it for 3 hours and measure the length of the sample to an accuracy of 0.02mm. Take the arithmetic mean of the two measurements.
A5 result expression
A5.1 molding shrinkage is calculated according to formula (A1): M,
where: M,-molding shrinkage, %;||tt ||L. The length of the mold cavity, mm;
L,—the length of the sample, mm.
The post-shrinkage rate of A5.2 is calculated according to formula (A2):
Where: Ps - post-shrinkage rate, %;
L - length of the sample, mm;| |tt||P,
L
L
Length of strip after treatment, mm. (A1)
(A2)
GB13454-92
A5.3 The test results are expressed as the arithmetic mean of two samples. A6 Test report
The test report should include the following content:
Indicate that it is in accordance with this supplement;
a.
b.
c.|| tt||Indicate the model and batch number of the sample tested;
Test results.
Appendix B
Method for determination of fluidity of amino molding compounds (Lexico) (supplement)
This supplement specifies the determination of a certain mass of amino molding compounds within a specified time. , temperature and pressure conditions, the length extruded from the standard die hole is the fluidity (Laxico) method.
B1 test equipment
B1.1 preform mold: diameter 28±1mm, height 10±1mm. B1.2 Laxico flow mold: The mold specifications are shown in Figure B1, and the roughness of the mold groove part is R.=0.20μm.
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