GB/T 45641-2025 in English
VALIDCashgora
- Issued on:2025-05-30
- Implemented on:2025-12-01
- File Format:PDF
- Delivery:Via email within 1~3 business days
$204.00
| Standard No: | GB/T 45641-2025 |
| Document status: | VALID |
| Title in English: | Cashgora |
| Title in Chinese: | 开士哥拉毛 |
| Language: | English |
| File Format: | Electronic (PDF) |
| Delivery: | Via email within 1~3 business days |
| Issued on: | 2025-05-30 |
| Implemented on: | 2025-12-01 |
| ICS Classification: | 59.060.10-Natural fibres |
| Chinese Classification: | W21-Half finished wool products |
| Professional Classification: | GB-National Standard |
| Related Keywords: | coarse hair content
impurity content oil content core content impurity content quality indicationsk+diameter |
《GB/T 45641-2025开士哥拉毛》由TC513（全国纤维标准化技术委员会）归口，主管部门为国家标准委。
Introduction
Analysis of the core content of the standard
This standard systematically regulates the quality system of Cashgrass (the coat of a hybrid of Angora goats and Cashmere goats) for the first time, and establishes a technical framework for two types of products:
| Comparison dimensions | Washed cashgrass | Combed cashgrass |
|---|---|---|
| Core indicators | Average diameter, length, net wool rate, whiteness | Average diameter, length, coarseness content, impurity content |
| Quality Indication | SK+diameter (3 digits)+length (2 digits)+characteristic code | diameter (3 digits)+length (2 digits) |
| Key Limits | Net wool rate A≥80%, whiteness level 1≥86% | Roughness content A≤0.3%, impurity content A≤0.2% |
| Testing Method | GB/T 6500 moisture regain, GB/T 6977 oil content | GB 18267 impurity content, heterochromatic fiber count |
Technological Evolution and Innovation
Compared with the traditional cashmere standard GB 18267 has three major breakthroughs:
- Original coding system: Through the "SK21645-C2" type coding, the diameter is accurate to 0.1μm and the length is marked in whole millimeters
- Dynamic grading mechanism: The short hair rate threshold is set differently according to the length range of the combed hair (A grade ≤6% when ＞45mm)
- Compound common weight formula: Introducing the oil content correction factor, the common weight calculation formula is expanded to:
m=mn×(100+Rp)×(100+Jp)/(100+Re)(100+Je)
Key points for detection implementation
Case study on clean wool rate test
Measured data of a batch of clean wool: absolute dry weight 4.852g, oil content 1.2%, moisture regain 13.8%, calculated according to the formula:
A=(4.852×(100-1.2)×(100+14)×(100+1))/(5×106)×100=78.34%
Compared with Table 1, it is judged as Grade B (70～<80%).
Key instrument requirements
- Fiber diameter optical analyzer: The projection microscope method must still be used for arbitration inspection
- Oven: The moisture regain detection temperature is controlled at (105±2)℃
- Whiteness meter: Use D65 light source and 10° observation angle
Industry application suggestions
Purchasing link
It is recommended to give priority to products with complete model markings, such as "SK19852-B1" means:
- Average diameter 19.8μm
- Average length 52mm
- Net gross rate 70~80%
- Whiteness 78~86%
Production control
Key points to monitor during combing:
Coarse hair content: Control the coarse hair content by adjusting the combing machine spacing (recommended 8-12mm)
Heterochromatic fibers: If there are more than 30 fibers in every 5g sample, it will be downgraded to C gear
Loading PDF document...
Error loading PDF. Please make sure the file is valid and try again.
We also recommend
-
GB/T 14271-2024 in English
Test method for the yield of greasy wool and raw cashmere—Oil pressure method
2024-09-29 -
GB/T 6500-2008 in English
Test method for moisture regain of hair fibers—Oven method
2008-08-20 -
GB/T 19722-2005 in English
Scoured sheep wool
2005-03-23 -
GB/T 24317-2009 in English
Stretch wool top
2009-09-30 -
GB/T 10685-2007 in English
Wool—Determination of fiber diameter—Projection microscope method
2007-06-21
