FZ/T 60008-2019 in English
VALIDTest method for non-recoverable extension of blanket
- Issued on:2019-12-24
- Implemented on:2020-07-01
- File Format:PDF
- Delivery:Via email within 1~3 business days
$88.00
本标准规定了毛毯非可复性伸长的试验方法。
本标准适用于机织毛毯，其他毛机织物可参照执行。
Introduction
Background of Standard Revision
This standard replaces the 1992 version of FZ/T 60008. The main technical changes include: test load is uniformly adjusted to 98N, pre-tension treatment requirements are added, and the size specifications of the specimen are modified. The revision is based on GB/T 1.1-2009 Standardization Work Guidelines and was proposed by the Bedding Sub-Technical Committee of the National Technical Committee for Textile Standardization (SAC/TC209/SC3).
Core Test Principle
The specimen is stretched to a set load (98N) at a constant speed of 500mm/min by an electronic fabric strength tester, and the irreversible deformation is measured after the specified time. Calculation formula:
| Parameter | Definition | Unit |
|---|---|---|
| ε | Irrecoverable elongation | % |
| L1 | Initial gauge length | mm |
| L2 | Gage length after recovery | mm |
Comparison of key technologies between the new and old standards
| Technical indicators | FZ/T 60008-1992 | FZ/T 60008-2019 |
|---|---|---|
| Specimen size | 75mm×25mm | 110mm×275mm |
| Test load | Grading setting | Uniform 98N |
| Pretreatment | Not specified | 24 hours humidity adjustment |
| Result accuracy | ±1mm | ±0.5mm |
Key operating points
- Specimen preparation: Take 3 pieces along the longitude and latitude directions, mark the 200mm measuring gauge length
- Test environment: temperature 20±2℃, relative humidity 65%±4% (according to GB/T 6529)
- Instrument calibration: use 0.5 grade force sensor (in accordance with GB/T 16825.1)
- Data processing: rounded to 0.1% according to GB/T 8170
Implementation Suggestions
Case: An enterprise found that the elongation exceeded the standard during detection. After investigation, it was found that the humidity adjustment treatment was not carried out for 24 hours as required by the standard, resulting in a measurement value deviation of 15%.
It is recommended to establish a standard operation list:
- Real-time monitoring of temperature and humidity in the pretreatment room
- Regularly check the distance between fixtures (275±5mm)
- Use automatic reading system to reduce human error
Technological evolution trend
This standard reflects the three development directions of textile testing technology:
- Precision of test conditions : Unification of load values to eliminate grading errors
- Scientific specimen specifications : Increasing size to reduce edge effects
- Standardization of process control : Clarifying pretreatment requirements
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