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GB/T 33831-2017 PDF in English

GB/T 33831-2017 (GB/T33831-2017, GBT 33831-2017, GBT33831-2017)
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GB/T 33831-2017: PDF in English (GBT 33831-2017)

GB/T 33831-2017
ICS 59.100.10
Q 36
Coated Glass Fiber Products – Determination
of Resistance to Creasing and Folding Behavior
ISSUED ON. MAY 31, 2017
Issued by. General Administration of Quality Supervision, Inspection and
Standardization Administration of PRC.
3. No action is required - Full-copy of this standard will be automatically &
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Table of Contents
Foreword ... 3
1 Scope ... 4
2 Normative References ... 4
3 Principle ... 4
4 Apparatus ... 4
5 Specimen ... 6
6 Operation ... 6
7 Test Results ... 7
8 Test Report ... 7
This Standard was drafted as per the rules specified in GB/T 1.1-2009.
This Standard was proposed by China Building Material Federation.
This Standard shall be under the jurisdiction of National Technical Committee for
Standardization of Glass Fiber (SAC/TC 245).
Drafting organizations of this Standard. Nanjing Fiberglass Research & Design
Institute Co., Ltd., and China National Fiberglass Product Quality Supervision & Testing
Chief drafting staffs of this Standard. Hao Zhengtao, Xu Qi, Fang Yunwei, Huang Ying,
Wang Yumei, Ma Dan, and Li Junguang.
Coated Glass Fiber Products – Determination
of Resistance to Creasing and Folding Behavior
1 Scope
This Standard specifies the principle, apparatus, specimen, operation, test results and
test report for determination of resistance to creasing and folding behavior of coated
glass fiber products.
This Standard is applicable to the products using glass fiber cloth as the substrate
coated with polyvinyl chloride, polyurethane, fluorine resin, chloroprene rubber or
chlorosulfonated polyethylene rubber.
2 Normative References
The following document is essential to the application of this document. For the dated
documents, only the versions with the dates indicated are applicable to this document;
for the undated documents, only the latest version (including all the amendments) are
applicable to this document.
GB/T 7689.5 Reinforcements – Test Method for Woven Fabrics – Part 5.
Determination of Tensile Breaking Force and Elongation at Break for Glass Fiber
3 Principle
Fold the elongated specimen in the length direction; use roller to roll in the length
direction for several times; unfold the specimen and measure its tensile breaking force;
use the retention rate of tensile breaking force to represent the resistance to creasing
and folding behavior of the products.
4 Apparatus
4.1 The example of creasing and folding roller can refer to Figure 1.
The roller shall be made of stainless steel, its surface shall be smooth with diameter of
(90±1) mm, width of (100±1) mm; the tray for placing the counterweight shall be
equipped with to ensure the creasing and folding force of the roller acting on the folding
7 Test Results
Take the breaking load per unit width as the tensile breaking force (N/mm) of the
specimen; respectively calculate the average value of warp and weft tensile breaking
force of the initial specimen and specimen through treatment; and calculate the
retention rate of tensile breaking force, which shall reserve one digit after decimal.
8 Test Report
The test report shall include the following contents.
a) Instructions are based on this Standard;
b) Identify the necessary details of the sample to be tested;
c) The Number of specimen;
d) Humidity control and test environment;
e) Tester type and range;
f) Specimen width and the number of yarns;
g) Creasing and folding force;
h) Tensile breaking force of the initial and treated coated glass fiber products;
i) Retention rate of tensile breaking force;
j) Any operation details that are not mentioned in this Standard; or any factors that
may influence the results;
k) Test personnel, and test date;
l) Other test-related information.
Source: Above contents are excerpted from the PDF -- translated/reviewed by: www.chinesestandard.net / Wayne Zheng et al.