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Detailed description

Acetate fiber silk fabric

Detection standard

  • Detection specification

Acetate fiber, commonly known as acetate fiber, is a semi synthetic fiber that can be divided into diacetate fiber and triacetate fiber. Acetate fiber is made from cellulose pulp and utilizes the action of acetic anhydride on hydroxyl groups. The hydroxyl groups are replaced by acetyl groups to generate cellulose acetate. Cellulose triacetate is dissolved in dichloromethane solvent to form a spinning solution, which is then dry spun to produce triacetate fiber. Triacetate cellulose undergoes saponification reaction in hot water to produce diacetate cellulose. Dissolving diacetate cellulose in acetone solvent for spinning can produce diacetate fibers Acetate fiber has poor alkali resistance, and under the action of alkali, it will gradually saponify and become regenerated cellulose; It is relatively stable in dilute acid solutions, but dissolves due to saponification and hydrolysis in concentrated acid solutions. The cross-section of acetate fibers is irregularly serrated, with no skin core structure, low modulus, and easy deformation. The elastic recovery at low elongation is excellent, and the density is smaller than that of viscose fibers. Therefore, the fabric is soft, elastic, less prone to wrinkling, and has good drape The percentage of hydroxyl groups on cellulose molecules that have been replaced by acetyl groups is called the degree of esterification. In the national recommended standards for the names of chemical fibers, there are two entries: "acetate fiber" and "triacetate fiber". 74% to 92% of the hydroxyl groups in acetate fiber are acetylated, with an esterification degree of 2.22-2.76; At least 92% of the hydroxyl groups in the triacetate fiber are acetylated, with an esterification degree of 2.76-3. Due to the difficulty in identifying diacetate fibers and triacetate fibers according to standard definitions, actual inspections are generally based on physical and chemical properties. However, their chemical composition is similar, resulting in many similarities in physical and chemical properties, which brings considerable difficulties to qualitative identification

Function of testing report:

1. Project bidding: Issue authoritative third-party CMA/CNAS qualification report

2. Online e-commerce platform entry: Quality inspection report recognized by major e-commerce platforms

3. Used as a sales report: issuing legally effective testing reports to make consumers more confident

4. Papers and research: Provide professional personalized testing needs

5. Judicial services: providing scientific, fair, and accurate testing data

6. Industrial problem diagnosis: Verify the troubleshooting and correction of industrial production problems

100% inspection and testing process:

1. Telephone communication and confirmation of requirements

2. Recommend solutions and confirm quotations

3. Mail samples and arrange testing

4. Progress tracking and result feedback

5. Provide reports and after-sales service

6. If urgent or priority processing is required

Testing and testing characteristics:

1. The testing industry is fully covered, meeting different testing needs

2. Fully cover the laboratory and allocate localized testing nearby

3. Engineers provide one-on-one services to make testing more accurate

4. Free initial testing, with no testing fees charged

5. Self service order delivery for free on-site sampling

6. Short cycle, low cost, and attentive service

7. Possess authoritative qualifications such as CMA, CNAS, CAL, etc

8. The testing report is authoritative and effective, and is generally used in China

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