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GB/T 33338-2016Test methods of twist for dipped yarns and cords (English PDF)

浸胶纱线、线绳和帘线捻度试验方法

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Issued by

SAMR; SAC

Level / Type

National · Recommended

Issue date

December 13, 2016

Implementation date

July 1, 2017

Scope

GB/T 33338-2016 is the English-translated version of 浸胶纱线、线绳和帘线捻度试验方法.

GB/T 33338-2016 is the Chinese standard "Test methods of twist for dipped yarns and cords". Its scope clause reads: This standard specifies the test method for the determination of dipped yarns, cord and cord twist made of chemical fiber or inorganic fiber material.

This standard applies to the determination of dipped yarns, cord and cord twist, and other non-dipped yarns, cord and cord twist can also be measured According to the implementation.

Its clauses include normative reference documents; test principle; instruments and tools; test general.

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Document preview — GB/T 33338-2016

National Standard of the People's Republic of China

ICS
83.140.99
Classification
G 47

Issued by: State Administration for Market Regulation; Standardization Administration of the PRC

Contents

  • 1 Scope
  • 2 normative reference documents
  • 3 test principle
  • 4 instruments and tools
  • 5 Test General

1 Scope

This standard specifies the test method for the determination of dipped yarns, cord and cord twist made of chemical fiber or inorganic fiber material.

This standard applies to the determination of dipped yarns, cord and cord twist, and other non-dipped yarns, cord and cord twist can also be measured

According to the implementation.

2 normative reference documents

The following documents are indispensable for the application of this document. For dated references, only the dated edition applies to this article

Pieces. For undated references, the latest edition (including all modifications) applies to this document.

GB/T 6529 Standard atmosphere for textiles for humidity control and testing

Representation and Judgment of Numerical Correction Rule and Limit Value of GB/T 8170

3 test principle

Under the specified pre-tensioning force, the specimen is fixed in the holder of one end of the twister, and the holder of the other end of the twist is rotated

The twist of the sample in the specified length until the strands or monofilaments in the sample are parallel, observe the twist direction and read the twist value.

4 instruments and tools

4.1 twist meter

The twist test shall be carried out using a twist meter, which shall meet the following requirements.

a) with two grippers, one of which can be connected to the twist meter motor shaft can rotate in the direction of rotation in both directions but not

Can move, the other movable holder can adjust the sample clamping length but can not rotate;

b) the number of revolutions of the rotary counter should be recorded or displayed to the nearest one;

c) with twist indicator;

d) with the measurement of the length of the sample scale, the accuracy of 1mm;

e) a device having a pre-tension applied to the sample.

4.2 Tools

Analysis needle.

5 Test General

5.1 Test environment

The test shall be carried out in the standard atmospheric environment specified in GB/T 6529.

......
This preview omits tables, figures, formulas and parts of the technical clauses. The complete document — 15 pages — is available in the English PDF.

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