This standard specifies the specifications, technical requirements, test methods, acceptance rules, packaging and marking of standard bleached cotton thread for dye testing. This standard is applicable to the identification of the quality of standard bleached cotton thread for dye testing that has been scoured and bleached but not mercerized, not treated with brighteners, not sizing, and not bluing, and is applicable to processing and manufacturing. HG 2607-1994 Standard bleached cotton thread for dye testing HG2607-1994 Standard download decompression password: www.bzxz.net

Chemical Industry Standard of the People's Republic of China
Standard bleached cotton thread for dye testing
Subject content and scope of application
HG2607-94
This standard specifies the specifications, technical requirements, test methods, acceptance rules, packaging and marking of 13.9×2tex (42°2) standard bleached cotton thread for dye testing.
This standard is applicable to the quality identification of standard bleached cotton thread for dye testing (after scouring and bleaching, but not mercerized, whitening agent, sizing, or bluing), and is applicable to processing and manufacturing. 2 Reference standards
GB2374 General conditions for dyeing determination GB/T2375 Determination of color intensity of direct dyeing GB2543 Test method for yarn snatch
GB3916
GB7573
Determination of breaking strength and breaking elongation of single yarn Determination of pH value of water extract of textiles
Instrumental evaluation method for whiteness of textiles
GB8425
ZBW 04 019
9 Test method for capillary effect of textiles
3 Technical requirements
Standard bleached cotton thread for dyeing test shall meet the following requirements. 3.1 Appearance: no messy yarn, white surface, clean hook, no pollution, oil stains, yellow spots. 3.2 Single yarn breaking strength: 11.2±0.5cN/tex3.3 Twist coefficient: 400~530
3.4 ​​pH value: 7±0.5
3.5 Capillary effect: 10±1cm/30min
3.6 Whiteness: 75±5
3.7 Dyeing effect: The color difference between batches of standard bleached cotton yarn for dye test is "approximate" to "slight" when dyed with the same dye and the same dyeing method, and the change in color depth is not more than ±5%. 4 Grading regulations
4.1 The grade of standard bleached cotton yarn for dye test is evaluated by combining internal quality with appearance quality, and is divided into qualified products and unqualified products. 4.2 Internal quality assesses single yarn breaking strength, twist coefficient, pH value, capillary effect, whiteness and dyeing effect. Its various indicators should meet the relevant provisions of Articles 3.2 to 3.7 of the technical requirements. If one indicator does not meet the requirements, it is an unqualified product. 4.3 Appearance quality is qualified if it meets the requirements of 3.1. 4.4 Final grade assessment
Approved by the Ministry of Chemical Industry of the People's Republic of China on March 21, 1994, and implemented on December 1, 1994
Internal quality
Unqualified
Test method
5.1 Appearance
Visual inspection.
2 Determination of single-line breaking strength
Performed in accordance with the method of GB3916.
5.3 Determination of grab coefficient
Performed in accordance with the method of GB2543.
5.4 Determination of pH value
Performed in accordance with the method of GB7573.
5.5 Determination of capillary effect
Performed in accordance with the method of ZBW04019.
5.6 Determination of whiteness
Performed in accordance with the method of GB8425.
5.7 Dyeing effect determination
HG2607—94
Unqualified
General provisions shall be carried out in accordance with the relevant provisions of GB2374, and specifically in accordance with the method of GB/T2375. 6
Acceptance rules
6.1 User acceptance
Unqualified
Unqualified
Unqualified
User acceptance shall be carried out in accordance with the provisions of this standard. When the supply and demand parties have objections to the product quality, they can negotiate to resolve the issue. 7
Packaging and marking
7.1 The packaging of the dye test standard bleaching line shall ensure that the quality is not damaged and is suitable for transportation. 7.2 The packaging of the dye test standard bleaching line adopts cloth bags lined with plastic bags, and the net weight of each bag is 20kg. 7.3 The markings shall be clear and easy to identify. Each package should have the name of the manufacturer, product name, production date, specifications, weight and the name of the supervision unit. Each package should be accompanied by a product quality certificate with the standard number on it. 8 Others
If the user has other requirements, the supply and demand parties shall make a separate agreement. 2
Structure of A1 line
HG2607—94
Appendix A
Technical index regulations for 13.9×2tex (42°/2) natural color line (reference)
The standard bleached line for dye test is pure cotton ply yarn, which is made of 13.9tex single yarn into 13.9×2tex ply yarn. The technical indicators of the natural color line are as follows:
11×220×2
（55/2~29/2）
A3 Grading
Quality index
Not less than
Weight unevenness
Not greater than
A3.1 The grade and grade of the natural color line are lower than the first grade, and the evaluation method of the grade and grade of the A4 natural color line is unqualified. The number of cotton knots and impurities in one gram is not more than
Grade index.
Weight deviation
Actual grab coefficientwww.bzxz.net
400~530
A4.1 The grade of the natural color line is evaluated by the quality index and weight unevenness. When the quality index and weight unevenness are different, the lowest grade of the two items shall be used for evaluation.
A4.2 The grade of the natural color yarn is evaluated by the number of cotton nep impurities. A4.3 When the weight deviation of the natural color yarn exceeds the allowable range, it is regarded as unqualified and is downgraded by one grade based on the original grade of the natural color yarn.
Additional instructions:
This standard is proposed by the Technical Supervision Department of the Ministry of Chemical Industry of the People's Republic of China. This standard is under the jurisdiction of Shenyang Chemical Research Institute. This standard is drafted by Beijing Cotton Printing Product Quality Testing Center. The main drafters of this standard are Wang Xishun, Tao Rong and Sun Bijun. 3
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