This standard specifies the minimum quality requirements and corresponding inspection methods for six grades of natural raw rubber. This standard applies to all grades of natural raw rubber standard rubber in my country. GB/T 8081-1999 Natural raw rubber standard rubber specification GB/T8081-1999 standard download decompression password: www.bzxz.net

GB/T8081-199S
This standard is the revised version of GF/T8081-1987 Natural Rubber Standard Rubber Specification 3, and is directly and equivalently revised by the corresponding international standard 1S) 2000: 199H Natural Rubber Specification (Fifth Edition). The difference between this standard and 1989 is that two grades of viscous rubber (CV) and shallow rubber (E) are added to the rubber grade, and the test methods GB/T8081-199S
are added accordingly. The determination of Mooney value of unalkalized rubber and GB1479613 Natural Rubber Color
Index are determined. In addition, the limit value of volatile matter content of each raw material is set at 0.8%. (This standard is proposed by the Ministry of Agriculture of the People's Republic of China. The drafting unit of this standard is: South China Agricultural Products Industry Research Institute. The main drafters of this standard are Deng Pingyang and Lie Donghua. This standard is the second edition. The first edition was issued in July 1987. This standard is under the jurisdiction of the National Glue and Rubber Products Standardization Technical Committee Natural Rubber Sub-Technical Committee and is responsible for the interpretation. 25
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GB/T8081-1999
ISO Foreword
TS) (International Organization for Standardization) is an industry-wide joint organization of national standards bodies (more than 150 member groups). The work of formulating national standards is usually carried out by ISO technical committees. Any member group that has an interest in an established technical committee has the right to join the committee: governmental and non-governmental international organizations that have relations with ISO may also participate in this work. In the field of electrical engineering In terms of technical standardization, the Ministry of Industry and Information Technology works closely with the International Electrotechnical Commission (IEC). International standard drafts adopted by the technical committee shall be sent to the member groups for voting. When the international standard is published, at least 75 votes of the member groups shall be cast. Www.bzxZ.net
International Standard ISO2000 is jointly developed by the Technical Committee of ISO/TC45 Rubber and Rubber Products. The fifth edition of this standard cancels and replaces the fourth edition (I502000:1987), and defines the technical revisions.
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7 Scope
National Standard of the People's Republic of China
Natural Raw Rubber Standard Rubber Specification
Raw aataral rubber
Staadurd rubber
Specialties
This standard specifies the minimum quality requirements and corresponding test methods for six grades of aataral rubber. This standard is not applicable to the individual aataral standard rubbers of ten countries. GB/TB81-1999
eqvI50 2000:1989
Chengdu GB/T6081·1987
Except for constant viscosity rubber and our color policy (, the ten grades are determined by the highest effective value of impurities, while the world viscosity and light color rubber are determined according to the specified characteristics, such as low viscosity grade is determined by viscosity, color grade is determined by light color, busy grade rubber and full color rubber have high impurity content and No. 5 rubber, 2 Reference standards
The texts contained in the listed standards are all valid when this standard is published. All standards are subject to revision. The parties who make this standard should explore the availability of the latest version of the following standards. Determination of Mooney viscosity of unstandardized rubber (eyIS0286:1985) GB/T 12321992
GB/T 3510-1092
Determination of plasticity of raw rubber blends by rapid plasticity method (e91502007:1991)GD/T3517-1992Determination of plasticity retention rate of natural raw rubber (ncqISO293,1981)GB/T 4499--1997
Determination of mortar (em15247:1990)
GE715737:199?Determination of raw rubber quality (cqV15021R:199T)Determination of impurity content of natural raw rubber (19O249:1974)GB/T 8086-1587
GTT 8088-1$87
GB/T11796-1993
Natural raw rubber content determination method (IS01656:197) Natural raw rubber color index determination method (ES0)4680:1991) CH/T15340-1994
Sampling method for synthetic raw rubber (IDT150)1795:1992) 3 Sampling
Natural raw rubber shall be sampled in accordance with GB/T15340 or in accordance with relevant agreed methods. 4 Requirements
4.1 The raw rubber supplied according to this standard shall not contain acid-disinfected rubber. All the parent stocks in the batch of rubber shall be subjected to acid treatment to determine whether they meet the technical requirements listed in Table 1. Note: It is generally believed that quality and performance retention rate are the most important specifications. National quality technical supervision information 1999-08-11 approved 2000-02-01 implementation
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among them, (m/m), initial position
integrity benefit value, minimum value
integrity retention rate, minimum position
hydrogen content, (4/) large position
volatile matter content must be the network
sufficient volume: Y
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GB/T 8086
GB/T 3517
GB/T 6737
CR/T4496
GB/I14796
GB/T1232
If only one rubber bag in a batch has a basic property test result that exceeds the specified limit, if another rubber bag has a test result that exceeds the specified limit, then this batch of rubber should be considered to still meet the requirements of this standard specification. In addition, the relevant parties may negotiate to determine the qualified conditions. Fine Corner Stone
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