FZ/T 50001-2016 in English

FZ/T 50001-2016 Test method for interlacing degree of synthetic filament yarns

1 Scope

This standard specifies four test methods for interlacing degree of synthetic filament yarns—Method A: manual needle-transfer method; Method B: manual heavy hammer method; Method C: instrument needle-transfer method, Method D: water bath needle-transfer method. In case of any dispute in the test result, Method A and Method B shall be adopted.

This standard is applicable to synthetic filament yarns.

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 (including any amendments) applies.

GB/T 4146.1 Textiles - Man-made fibres - Part 1: Generic names
GB/T 4146.3 Textiles - Man-made fibers - Part 3: Terms of inspection
GB/T 6502 Sampling method of man-made filament yarns
GB/T 8170 Rules of rounding off for numerical values & expression and judgement of limiting values
GB/T 14343 Testing method for linear density of man-made filament yarns

3 Terms and definitions

For the purposes of this document, the terms and definitions given in GB/T 4146.1 and GB/T 4146.3 as well as the following apply.

3.1
interlacing degree
quantity of the non-loosened interlaced knots with certain fastness per meter of filament under specified load

3.2
extrication load
minimum load imposed on the filament to satisfy the requirements for the interlacing degree

4 General requirements for the tests

Foreword i
1 Scope
2 Normative references
3 Terms and definitions
4 General requirements for the tests
5 Test methods
6 Result calculation
7 Test report
Annex A (Informative) Method to calculate pre-tension
Annex B (Normative) Calculation of additional test quantity
Annex C (Informative) Photoelectric counting method