GB/T 10802-2023General flexible polyurethane cellular plastics (English PDF)

Foreword

This document was drafted in accordance with the rules given in GB/T 1.1-2020 "Directives for standardization - Part

1.Rules for the structure and drafting of standardizing documents". This document replaces GB/T 10802-2006 "General flexible polyether polyurethane cellular plastics". Compared with GB/T 10802-2006, in addition to structural adjustments and editorial changes, the main technical changes are as follows:

a) Changed the scope of application (see Chapter 1 of this Edition; Chapter 1 of Edition 2006);

b) Changed the classification method and added grading (see Chapters 3 and 4 of this Edition; Chapter 3 of Edition 2006);

c) Changed the deviation requirements for length, width and thickness (see 5.1,

5.2 of this Edition; 4.1,

4.2 of Edition 2006);

d) Changed the appearance requirements (see

5.3 of this Edition;

4.3 of Edition 2006);

e) Added the apparent density deviation requirements (see

5.4 of this Edition);

f) Added the 40% indentation hardness deviation requirements (see

5.5 of this Edition);

1 Scope

GB/T 10802-2023 is the Chinese national standard on general flexible polyurethane cellular plastics, in the field of rubber and plastic industries. The /T suffix marks it as a recommended standard: it is not compulsory by itself, but it becomes binding as soon as a contract, a tender or a customer specification calls it up - which in practice is how most foreign buyers meet it. It was issued on 7 September 2023 by the State Administration for Market Regulation; Standardization Administration of China, and has been in force since 1 April 2024. Classification: ICS 83.100, CCS G32. This page is published from the official record of the standard held by the Chinese standards administration: the identification, the dates, the classification and the issuing body are taken from there. The clause text, the tables and the numeric limits are in the document itself, which is delivered complete in English translation.

This document specifies the classification, grading, requirements, inspection rules and marking, packaging, transportation, storage of general flexible polyurethane cellular plastics. It also describes the corresponding test methods. This document applies to flexible polyurethane foam in sheets, strips, blocks or cut shapes. This document does not apply to slow-rebound flexible polyurethane foam, high- rebound flexible polyurethane foam and thermoplastic polyurethane elastomer foam.

2 Normative references

The following referenced documents are indispensable for the application of this document. For dated references, only the edition cited applies. For undated references, the latest edition of the referenced document (including any amendments) applies.

GB/T 2918-2018, Plastics -- Standard atmospheres for conditioning and testing

GB/T 6342-1996, Cellular plastics and rubbers. Determination of linear dimensions

GB/T 6343-2009, Cellular plastics and rubbers -- Determination of apparent density

GB/T 6344-2008, Flexible cellular polymeric materials -- Determination of tensile strength and elongation at break

GB/T 6669-2008, Flexible cellular polymeric materials -- Determination of compression set

GB/T 6670-2008, Flexible cellular polymeric materials -- Determination of resilience by ball rebound

GB/T 9345.1-2008, Plastics -- Determination of ash -- Part

3 Classification

General flexible polyurethane cellular plastics are divided into five categories according to their application areas. X, V, S, A, and L. Their usage types are shown in Table 1.

4 Grading

General flexible polyurethane cellular plastics are graded according to 40% indentation hardness, see Table 2.

6 Test methods

6.1 Timeliness and conditioning The test samples shall be placed under natural conditions for 72 h from the date of product production before sampling.

8 Marking, packaging, transportation and storage

8.1 Marking The product shall have a certificate of conformity. The product identification shall include the name, trademark, specification, model, color, production date, batch number, manufacturer name, manufacturer address, inspector seal and standard number, etc.

8.2 Packaging The product can be packaged in plastic bags, woven bags, etc.

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