This standard specifies the technical requirements, test methods, acceptance rules, and methods of labeling, packaging, transportation and storage of latex and rubber yarn. This standard applies to round monofilaments and banded latex yarns made from natural latex. HG/T 2889-1997 Latex and rubber yarn HG/T2889-1997 Standard download decompression password: www.bzxz.net

HG/T2889-1997
This standard is equivalent to the former Soviet Union standard FQCT10646-85 "Technical Conditions for Rubber Wire", and the format of the writing is in line with the basic requirements of the drafting and expression of standard abbreviations in GB/T1.1--1993. In addition to the test items specified in the former Soviet Union standard, the technical requirements of this standard have added Schwartz value determination and copper pollution resistance test during rubber wire washing. The test method standards of its various technical requirements are equivalent to or equivalent to ISO2321:1983 "Rubber Wire Test Method" series standards. In addition, according to the rubber wire heat aging test standard, the rubber wire is aged at 100% elongation and 100, 22h: while the former Soviet Union standard stipulates that the rubber wire is aged at 70℃ and 24h in a natural state, so this standard is more stringent than the former Soviet Union standard.
This standard is 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 the latex standardization technology management unit of the Ministry of Chemical Industry. This standard was jointly drafted by Shenyang Latex Factory and Latex Industry Research Institute of the Ministry of Chemical Industry. The main drafters of this standard are Xing Wei, Liu Wei, Liu Chunhong and Zhao Ping. ICS83. 140. 99
Record number
Huang Fange
465---1997
People's Republic of China Latex Industry Standard
Latex Threadi
/2889—99″
This standard specifies the technical requirements, test methods, acceptance rules, and methods of identification, packaging, transportation and storage of latex and rubber threads. This standard is applicable to round monofilament and tape latex threads made of natural latex as raw materials. The following standards are used as 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. The parties using this standard should explore the possibility of using the latest versions of the following standards. GB2828—87 Batch-by-batch inspection counting sampling procedures and sampling tables (applicable to continuous batch inspection) HG/T2412.1--92 Rubber thread test method Rubber thread meter value determination (idtISO2321:1983) HG/T2412.2--92 Rubber thread test method Rubber thread count determination (idtISO2321:1983) H G/T2412.3--92 Test method for rubber thread Determination of rubber thread density (idt: ISO2321: 1983) HG/T2488-93 Determination of tensile properties of rubber thread HG/T2724.2--1995 Test method for rubber thread Determination of copper contamination resistance during washing HG/T2724.6-1995 Test method for rubber thread: Thermal aging test (idt ISO2321: 1983) HGT27 24.7--1995 Rubber thread test method: determination of tensile stress (idtIS02321:1983) 3 Technical requirements
3.1 Nominal diameter and density of rubber threads of different specifications (counts) The quality of rubber threads of various specifications (counts) 1.m long shall comply with the requirements of Table 1,
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1 standard quality \
() Density (mg/m)
Nominal diameter (m)
Specification (count)
HG / T 2889 -- 1997
Note: 1. The quality limit deviation is 10% of the nominal value (including negative value) 2. The diameter limit deviation is 5% of the nominal value (including negative value). 3. 2 The tensile properties of the rubber wire shall comply with the requirements of Table 2, 0.990
0, 200 7
0. 0-68 8
Controlled impact strength, MPa
Breaking elongation, device
600% fixed permanent double shape, %
schwartz, Sym, Mpu2)
Laminar strength after aging, MPa3
HG / T 2889 -1907
3 The copper pollution resistance of latex during washing should be as specified in Table 3 Table 3
Color level of chloramine
Color level of bleached thin
Color change level of rubber thread
3.4 ​​The surface of rubber thread should be uniform, without pitting, rubber particles and other defects that may affect the performance 4 Test method
4 The diameter of the real rubber thread
Use a reading microscope with an accuracy of 0.01mm to measure. 4.2 The density of rubber thread
It is determined according to the method specified in IIGT2412.3.
4.3 The quality of 1m long rubber wire
is determined by the method specified in HG/T2412.1.
4.4 Determination of rubber wire countwwW.bzxz.Net
is determined by the method specified in HG/T2412.2.
4.3 The tensile strength and elongation at break of rubber wire are determined according to the provisions of HG/T2488.
4.6 Determination of 600% elongation permanent deformation
The length of the test specimen is 200mm±5mm, and the test section is marked on the specimen. The length of the test section is 100mm±! mm. The length of the specimen is measured with a ruler with a resolution of 1mm. The test is carried out in a rubber tensile testing machine. The tensile speed of the specimen is (500±50) mm/min.
Instructions:
1) The former Soviet Union standard gives the diameters of rubber wires of various specifications. This standard adds the nominal weight of rubber wires of various specifications. 2) The former Soviet Union standard does not have this provision, and this indicator is more important for controlling the quality of rubber wire. 3) The aging test conditions are more stringent than the former Soviet Union standard, and the indicators are slightly lower than the former Soviet Union standard. 4) The Soviet Union standard does not have this provision.
HG/T2889-1997
Knot the sample into a ring at the end, and the half length of the ring is 100mm. Put the sample on the upper and lower clamps with a freely rotating circular axis, start the machine to make the sample elongation 600%, and keep the stretching state for 15 minutes, then return to the original position, remove the sample and park it for 15 minutes, and then use a ruler (resolution 1mm) to measure the length of the test section. The 600% fixed elongation permanent deformation is calculated as follows: H
Where: H—.600% fixed elongation permanent deformation, %: Ll—-test section length after test, mn;
L.—test section length before test, mm.
L,--L.
The median value of the three samples is used to represent the 600% elongation deformation of the rubber thread. 4.7 Determination of Schwartz value
Determine according to HG/T2724.7
4.8 Heat aging resistance of rubber thread
Determine according to HG/T2724.6, the aging conditions are 100C±1, 22h±0.3h; when determining the tensile strength after aging, the product should be weighed and marked after aging. 4.9 The color staining level of textiles and the color change level of rubber thread are determined according to HG/T2724.2. The textile fabric adopts multi-fiber standard adjacent fabric (SW type) 5 Acceptance rules
5.1 The unit product for sampling inspection is 1m rubber yarn. 5.2 The products are sampled and inspected according to GB2828. The inspection level (IL) and acceptable quality level (AQL) shall comply with the provisions of Table 4. Table 4
Tensile properties
Tensile properties
Tensile properties
Tensile properties
Tensile properties
Resistance to contamination during washing
Tensile strength
Elongation at break
600% elongation permanent deformation
Schwartz value
Tensile strength after aging
Discoloration of rubber yarn. Textile staining performance test water, 1L
Qualified quality level, AQL
5.3 When the inspection result does not exceed the AQL value specified in Table 4, the batch of products is judged to be a qualified batch. 5.4 When any item of the inspection result exceeds the AQL value specified in Table 4, the unqualified item can be strictly inspected once. If it is qualified, it is judged as a qualified batch. If it is still unqualified, the batch of products is judged to be unqualified. 5.5 Under the condition that the production process conditions remain unchanged, the heat aging performance of the rubber thread shall be tested at least once a month, and the copper pollution resistance of the rubber thread during the washing period shall be tested at least once a quarter.
Labeling, packaging, transportation and storage
Medical labeling
H4/F 2889 -1997
The latex thread packaging box should indicate the product name, specification, quantity, product standard number, manufacturer name, factory address, registered trademark, production period and qualified product mark, etc.
62 Packaging
Several rubber threads are packed in one packaging box. The packaging box should be strong enough to prevent the product from being damaged during transportation. 6.3 Transportation
The product should be covered during transportation, and should not be exposed to moisture or heat, and should be kept dry. 6.4 Storage
6.4.1 The product should be stored in a well-ventilated, cool and dry warehouse with a temperature below 35℃ and a relative humidity below 80%. 5.4.2 The product should be stacked at least 20cm above the ground, and the stacks should be kept at an appropriate distance from each other and at least 1 meter away from heat sources. 6.4.3 During storage, the product must not come into contact with oil, acid, alkali, copper, manganese and other substances that are harmful to rubber. 6.4.4 Under the above conditions, the product has a storage period of 18 months from the date of manufacture.
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