FZ/T 50009.3-2007Testing method for crimping performance of hollow polyester staple fibres (English PDF)

Foreword

The standard pre-tension parameters and Appendix C to modify using BISFA "polyester staple fiber test method" (1998 edition) standard, the standard Although the prospective method will be described for several other curly, curly degrees outside, but the content of parameters and statistics involved are equally applicable to the present standard.

Instead of the standard FZ/T 50009.3-1998 "three-dimensional crimped polyester staple fiber curl performance test method." this standard FZ/T 50009.3-1998 The main technical content differences are as follows.

--- Normative references removed GB/T 14464 "polyester staple fiber";

--- Increase the extraction and testing to determine the number of spare parts laboratory sample;

--- Increasing the humidity-time laboratory sample and fast method for the humidity;

--- Modify the relative humidity and the humidity test with the standard atmosphere;

--- Increasing the counting method two-dimensional crimp hollow polyester fiber number;

--- Increased pre-tension method for calculating;

--- Increasing the sample to determine the amount of time required to calculate the bulk sample as well as the coefficient of variation coefficient of variation do not meet requirements how to increase Number of trials.

Appendix C of this standard is a normative appendix, Appendix A, Appendix B is an informative annex.

The standard proposed by China Textile Industry Association.

This standard by the Shanghai textile industry technical supervision of the centralized.

This standard was drafted. China Sinopec Yizheng Chemical Fibre Company Limited.

1 Scope

This standard specifies the test method for crimp hollow polyester staple fiber properties.

This standard applies to test hollow polyester staple fiber curl properties.

2 Normative references

The following documents contain provisions which, through reference in this standard and become the standard terms. For dated references, subsequent Amendments (not including errata content) or revisions do not apply to this standard, however, encourage the parties to the agreement are based on research Whether the latest versions of these documents. For undated reference documents, the latest versions apply to this standard.

GB 6529 textiles conditioning and testing - Standard atmospheres GB/T 8170 numerical rounding rules GB/T 14334 chemical fiber staple sampling method Principle 3 in the predetermined load, the force within a certain time, measured changes in length of the fibers, to determine the number of crimps of the fibers, crimp ratio, crimp back Repetition rate and crimp modulus of elasticity and other properties.

4 Device

4.1 crimp elastic Technical Requirement.

a) scale range 5mN balance, its minimum scale value 0.01mN; scale range of 10mN balance, the minimum scale Value 0.2mN;

b) does not exceed the length of the error holding 0.2mm.

4.2 cashmere plate. a contrasting color and fiber.

4.3 tweezers, ruler, etc.

5 Laboratory samples and specimens