HG 2001-1991 301-G30 Flame retardant reinforced polybutylene terephthalate (PBT) engineering plastics
Some standard content:
Chemical Industry Standard of the People's Republic of China
HG2001--91
301-G30 Flame retardant reinforced poly(butylene terephthalate) (PBT) engineering plastics
Published on 1991-06-28
Implemented on 1992-01-01
Published by the Ministry of Chemical Industry of the People's Republic of China
Chemical Industry Standard of the People's Republic of China
301-G30 Flame retardant reinforced poly(butylene terephthalate) (PBT) engineering plastics
HG2001—91
Editor Chemical Industry Standard Editorial Department
(Standardization Research Institute of the Ministry of Chemical Industry)
Postal Code ：100013
Standardization Institute of Ministry of Chemical Industry
Copyright reserved. No reproduction allowed
Format 880×12301/16 Printing sheet 1/3 Number of words 11000 First edition in September 1991 First printing in September 1991 Number of copies 1-500
Chemical Industry Standard of the People's Republic of China
301-G30 Flame retardant reinforced polybutylene terephthalate (PBT) engineering plastics
1 Subject content and scope of application
HG2001-91
This standard specifies the technical conditions, test methods, inspection rules and marking, packaging, etc. of 301-G30 flame retardant reinforced polybutylene terephthalate (PBT) engineering plastics.
This standard applies to 301-G30 flame retardant reinforced polybutylene terephthalate (PBT) engineering plastics made by mixing and granulating polybutylene terephthalate with a certain amount of additives, flame retardants, glass fibers, etc. 2 Reference standards
GB1033
Test method for density and relative density of plastics
GB1034
Test method for water absorption of plastics
GB1040
GB1042
GB1043
GB1408
GB1409
GB1410
GB1634
GB2918
GB4609
GB6678
3 Product model
Test method for tensile test of plastics
Test method for bending test of plastics
Test method for impact test of simply supported beam of plastics
Solid electric Test methods for power frequency breakdown voltage, breakdown strength and withstand voltage of solid electrical insulating materials Test methods for relative dielectric constant and dielectric loss tangent of solid electrical insulating materials at power frequency, audio frequency and high frequency Test methods for insulation resistance, volume resistivity and surface resistivity of solid electrical insulating materials Test methods for heat deformation temperature (abbreviated as heat deformation temperature) of plastic bending load Standard environment for state adjustment and testing of plastic specimens Test methods for combustion performance of plastics Vertical combustion method General rules for sampling of chemical products
The products in this standard are natural color, with 30% glass fiber and other fillers and other flame retardant reinforced engineering plastics, and its model is 301-G30. 4 Technical requirements
4.1 Appearance
301-G30PBT engineering plastics are natural color granules. The particle diameter is 2~4mm and the length is 2~7mm. 4.2 Physical and chemical properties
The physical and chemical properties of 301-G30PBT engineering plastics shall comply with the provisions of Table 1. Approved by the Ministry of Chemical Industry of the People's Republic of China on June 28, 1991 and implemented on January 1, 1992
Density, g/cm
Water absorption (23℃, 24h), %
Molding shrinkage\, %
Tensile strength, MPa
Flexural strength, MPa
HG2001-91
Table 1 Physical and chemical properties
Superior product
Simply supported beam impact strength (complete口), kJ/mSimply supported beam impact strength (notched), kJ/mVolume resistivity, o·m
Relative dielectric band number (10\Hz)
Dielectric loss tangent (10°Hz)
Dielectric strength, MV/m
Heat deformation temperature (1.80MPa), c
Glass fiber content, %
Flame retardancy
Note, 1) When the user needs the transverse and longitudinal shrinkage rate, the supplier and the customer can negotiate. Test method
5.1 Sample preparation
1.0×1014
2.0×10-2
First-class product
2.0×10-1
Qualified product
2.0×10-2
5.1.1 Pretreatment of pellets
Before molding the specimens, the pellets should be preheated and dried, and dried continuously at 110~120℃ until the moisture content is less than or equal to 0.05%. The dried pellets should be kept warm at 90~110℃ to prevent moisture absorption. 5.1.2 Sample preparation conditions
The specimens are molded using a screw injection machine, and the process conditions are as specified in Table 2. Table 2 Processing conditions
Specimen type
Material temperature, ℃
Mold temperature, c
Injection pressure, MPa
Injection time (total cycle), s
5.2 Appearance inspection
Strip type
Appearance is inspected by visual method, and its particle size is measured by reading microscope. 5.3 Determination of density
Determined according to method B in GB1033.
Circular sheet type
250~255
240~245
230~235
Bell type
HG2001-91
5.4 Determination of water absorption
Determined according to GB1034, the sample should meet the requirements of Article 3.1. 5.5 Determination of molding shrinkage
The test shall be carried out in accordance with Appendix B of this standard.
5.6 Determination of tensile strength
The test shall be carried out in accordance with GB1040, and the specimen shall be type II. The standard environment for specimen state adjustment and testing shall comply with the requirements of Article 2.1 of GB2918, and the state adjustment time shall be not less than 16 hours.
5.7 Determination of flexural strength
The test shall be carried out in accordance with GB1042, and the specimen shall be a large specimen of molding material in the table. The standard environment for specimen state adjustment and testing shall comply with the requirements of Article 2.1 of GB2918, and the state adjustment time shall be not less than 16 hours. 5.8 Determination of impact strength
The test shall be carried out in accordance with GB1043, and the specimens shall be large specimens without notch and with notch. The standard environment for specimen state adjustment and testing shall comply with the requirements of Article 2.1 of GB2918, and the state adjustment time shall be not less than 16 hours. 5.9 Determination of volume resistivity
The measurement is carried out in accordance with GB1410, and the sample size is 100mm in diameter and 2±0.1mm in thickness. The standard environment for sample state adjustment and testing meets the requirements of Article 2.1 of GB2918, and the state adjustment time is not less than 24h. 5.10 Determination of homogeneous loss tangent and dielectric constant is carried out in accordance with GB1409, and the sample size is 100mm in diameter and 2±0.1mm in thickness. The standard environment for sample state adjustment and testing meets the requirements of Article 2.1 of GB2918, and the state adjustment time is not less than 24h. 5.11 Determination of dielectric strength
The measurement is carried out in accordance with GB1408 using continuous uniform voltage rise, and the sample size is 100mm in diameter and 2±0.1mm in thickness. The standard environment for sample state adjustment and testing meets the requirements of Article 2.1 of GB2918, and the state adjustment time is not less than 24h. 5.12 Determination of heat deformation temperature
Measured in accordance with GB1634, the sample size is 120±2mm in length, 15±0.2mm in height, and 10±0.2mm in width. The maximum normal bending stress of the sample is 1.80MPa.
5.13 Determination of glass fiber content
Measured in accordance with Appendix A of this standard.
5.14 Determination of flame retardancy
Measured in accordance with GB4609
6 Inspection rules
6.1 Products of the same model produced by the same production line, three shifts, under the same raw material ratio and the same process conditions are mixed uniformly into a batch.
6.2 The manufacturer and the user shall select the number of sampling units for random sampling according to the provisions of Table 2 of Article 6.6 of GB6678. The number of sampling units is calculated by the number of packaging bags (the two parties can also decide the number of sampling units according to the actual situation, but the arbitration must be in accordance with the provisions of GB6678). Mix the collected samples and reduce them to the required amount for the test, at least 5kg. The manufacturer must keep the remaining samples for three months for inspection. 6.3 The production unit shall conduct full performance inspection and acceptance of the received products within three months of leaving the factory. The manufacturer must ensure that the products leaving the factory meet the various technical requirements specified in this standard. 6.4 4.5, 6, 7, 8, 9, 10,Items 11, 12, 13 and 14 are the inspection items for each batch. Items 1, 2 and 3 in Table 1 are inspected once every 30 batches. Type inspection items shall be carried out in accordance with the provisions of Article 6.6.1 of GB1.3. 6.5 If the inspection results show that the prohibited technical indicators do not meet the requirements of this standard, new samples should be taken from the packaging of the batch of products with double the amount, and the unqualified items should be re-inspected and re-graded. If there is still one indicator that is unqualified, it will be treated as unqualified. 6.6 When the supplier and the micro-seller have objections to the product quality, the two parties shall negotiate to resolve the issue or the arbitration unit shall conduct arbitration. 3
Marking, packaging, transportation, storage
7.1 Marking
HG200191
Each batch of products shall have a quality inspection report indicating the grade and batch number. Each packaging bag shall have a certificate of conformity. There shall be clear and firm marks on the packaging bag indicating the product name, model, net blue, production date and production unit. 7.2 Packaging
The product is packed in white polypropylene woven bags (covered with film) and white polypropylene film bags. The inner bag is tied with a small thread, and the outer bag is sealed with a sewing machine (with nylon thread). The net weight of each bag is 25kg. 7.3 Transportation
During transportation, the product should be protected from sunlight and rain. The transportation vehicle should be kept clean. When handling, the packaging should be prevented from being damaged. This product is not a dangerous item.
7.4 Storagewww.bzxz.net
The product should be stored in a dark, dry and clean room, not near false air or other heat sources, and should be stored separately according to grade. A1 Scope of application
HG2001-91
Appendix A
Method for determining the disc content of glass fiber
(Supplement)
This method is applicable to the determination of the disc content of glass fiber in reinforced plastics. A2 Principle
Burn the weighed sample at a specified temperature of 600±20℃ until constant weight. A3 Apparatus
Crubbing crucible,
Electric furnace,
High temperature furnace, 0~650℃, analytical balance that can be controlled at ±20℃, sensitivity 0.1mg.
A4 Test Steps
Wash the crucible and put it in a high temperature furnace and burn it until constant weight. Weigh about 10g of the dried sample in the crucible. A4.2
Put the crucible with the sample in a fume hood and burn it in an electric furnace until smokeless. A4.3
Then put the pile into a high-temperature furnace and burn (600±20℃) for 2~4h, until the black color on the sample residue disappears. A4.4
A5 Result calculation
The glass fiber content is calculated according to formula (A1): Xi = m= m,= m2 × 100
Wherein: X, - glass fiber content, %, m; residue and crucible after burning, g
mi - mass of crucible, g;
m2 - non-volatile matter calculated according to the formula, 8my
- sample mass, g
The test result is expressed as the arithmetic mean of two samples, and the integer is taken. Appendix B
Determination method of molding shrinkage
(Supplement)
B1 Scope of application
This method is applicable to the determination of molding shrinkage of flame-retardant reinforced polybutylene terephthalate (PBT) engineering plastics. (A1)
B2 Key points of the method
HG2001-91
This method is to injection mold the injection molding material in a standard mold, measure the diameter of the disc sample and the inner diameter of the standard mold cavity, and calculate the molding shrinkage of the sample.
B3 Sample size
The diameter of the standard sample is 100±1mm, the thickness is 2±0.02mm, and there shall be no less than three samples. B4 Test tools
Vernier caliper, with an accuracy of 0.02mm;
Inner diameter caliper, with an accuracy of 0.02mm.
B5 Test steps
B5.1 Prepare the sample according to the requirements of Article 5.1 of this standard. B5.2 After the sample is taken out of the mold, press it with a 2000g gold plate and wait for it to cool. The standard environment for sample state adjustment and testing shall comply with the requirements of GB2918, and the state adjustment time shall not be less than 16h. B5.3 Measure the sample diameter in the longitudinal and transverse directions of injection respectively, with an accuracy of 0.02mm. B6 Result calculation
The molding shrinkage of the sample is calculated according to formula (B1): X
Wherein, X, the molding shrinkage of the sample, %; D-standard mold cavity inner diameter, mm
-sample diameter, mm,
The test results are expressed as the arithmetic mean of the longitudinal and transverse directions of three samples, rounded to one decimal place. Additional remarks:
This standard is proposed by the Science and Technology Department of the Ministry of Chemical Industry of the People's Republic of China. This standard is under the jurisdiction of the Plastics Resin Products Branch (SC) of the National Plastics Standardization Technical Committee. This standard was drafted by Beijing Chemical Industry Research Institute. The main drafters of this standard are Yang Fujiang, Liu Chenglin and Wang Hui.02mm. B6 Result calculation
The molding shrinkage of the sample is calculated according to formula (B1): X
Wherein, X, the molding shrinkage of the sample, %; D-standard mold cavity inner diameter, mm
-sample diameter, mm,
The test results are expressed as the arithmetic mean of the vertical and horizontal directions of the three samples, rounded to one decimal place. Additional notes:
This standard was proposed by the Science and Technology Department of the Ministry of Chemical Industry of the People's Republic of China. This standard is under the jurisdiction of the Plastic Resin Products Branch (SC) of the National Plastics Standardization Technical Committee. This standard was drafted by the Beijing Chemical Industry Research Institute. The main drafters of this standard are Yang Fujiang, Liu Chenglin and Wang Hui. 602mm. B6 Result calculation
The molding shrinkage of the sample is calculated according to formula (B1): X
Wherein, X, the molding shrinkage of the sample, %; D-standard mold cavity inner diameter, mm
-sample diameter, mm,
The test results are expressed as the arithmetic mean of the vertical and horizontal directions of the three samples, rounded to one decimal place. Additional notes:
This standard was proposed by the Science and Technology Department of the Ministry of Chemical Industry of the People's Republic of China. This standard is under the jurisdiction of the Plastic Resin Products Branch (SC) of the National Plastics Standardization Technical Committee. This standard was drafted by the Beijing Chemical Industry Research Institute. The main drafters of this standard are Yang Fujiang, Liu Chenglin and Wang Hui. 6
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