What are the main indicators of textile fiber testing?

The main indicators of 100 textile fiber testing are:

1. Fineness Fineness is the degree of fiber thickness. There are two types of indicators: direct indicators and indirect indicators. The direct index is generally expressed by the diameter and cross-sectional area of the fiber, because the cross-sectional area of the fiber is irregular and not easy to measure, it is usually not much when the direct index is used to express its thickness, so the indirect index is often used.

The indirect index is determined by the mass or length of the fiber, that is, the mass (fixed-length system) or length (fixed-weight system) of the fiber at fixed length or fixed weight. In the production of chemical fibers, due to the fluctuation of raw materials, equipment operation status and process conditions, the strip shaft of undrawn wire and drawn wire will be uneven. Therefore, the determination of the uniformity of the fiber along the length is an important indicator to measure the change of fiber quality, which affects the physical-mechanical properties of the fiber.

and dyeing performance, but also affect the textile processing performance of the fiber and the appearance of the fabric. Textile fiber testing.

2. Moistureabsorption is one of the physical properties of fibers, and the ability of fiber materials to absorb water from the gaseous environment is usually called hygroscopicity. The indicators that characterize hygroscopicity are:

1. Moisture regain and moisture content.

The moisture content in a fibrous material, i.e. the amount of adsorbed water, is usually expressed in terms of moisture regain or moisturecontent. The former refers to the percentage of the mass of moisture contained in the fiber to the mass of the dry fiber, and the latter refers to the percentage of the amount of moisture contained in the fiber to the actual mass of the fiber. The chemical fiber industry generally uses moisture regain to indicate the strength of fiber moisture absorption.

2. Standard status.

Moisture regain and nominal moisture regain: the actual moisture regain rate of various fibers varies with the ambient temperature and humidity, in order to compare the moisture absorption capacity of various fiber materials, it is placed in a unified standard atmospheric condition relative humidity.

After a certain period of time, their moisture regain reaches a steady-state value in the "hygroscopic process", at which point the moisture regain rate is the moisture regain rate in the standard state.

Physical and chemical index detection: fiber birefringence index, melting point, solubility, purity, oil content, density gradient, etc.;

First, it is necessary to divide international standards and national standards (internal and external standards).

International Standards: ISO; EU Standards: EN; International Ecological Textile Standard: OEKO-TEX; Japanese National Standard: JIS; China Textile Standards: GB, FZ; Wait a minute.

2. China's standard classification is mainly divided into 4 categories, among which: national standards and industry standards are commonly used testing and labeling, in addition to local standards and enterprise standards.

National standards: designated by the administrative department of standardization (now the General Administration of Quality and Technical Supervision, Inspection and Quarantine of the People's Republic of China), applicable nationwide, and other levels of standards shall not contradict it.

Industry standard: applicable to a certain industry in the country.

Routine testing: chemical composition analysis of fibers, yarns, chemical fiber filaments, textile (knitting) fabrics, clothing and down products, and Uster yarns. Special Testing:

Flame retardant, wear-resistant, moisture-permeable, breathable, water seepage, antistatic and other special performance testing of textiles. Ecological textile testing: pH value, formaldehyde content, banned azo dyes, extractable heavy metal content, pesticide residue, dye fastness, odor testing of textiles.

1. Routine testing: chemical composition analysis of fibers, yarns, chemical fiber filaments, textile (knitting) fabrics, clothing and down products, and Uster yarn.

2. Special testing: flame retardant, wear-resistant, moisture-permeable, breathable, water seepage, antistatic and other special performance testing of textiles.

3. Ecological textile testing: pH value, formaldehyde content, prohibited azo dyes, extractable heavy metal content, pesticide residue, dye fastness, odor testing of textiles.

4. Detection of dyes and additives: detection of pH value, formaldehyde content, dyeing fastness, prohibited azo dyes, heavy metal content, allergenic dyes, dye identification, solid content, impurity analysis, etc.

5. Textile material testing: Textile materials refer to fibers and fiber products, which are specifically manifested as fibers, yarns, fabrics and their composites.

With the increasing environmental protection and health awareness of consumers, in addition to the requirements for comfort, safety and functionality, consumers have also begun to pay attention to the quality of products at all stages from raw materials to finished products. Textile manufacturers and exporters face unprecedented challenges.

Ensuring the safety and health of consumers is the fundamental purpose of textile fabric testing, and in daily production and transactions, textile fabric testing can also be used as a standard for textile acceptance, judgment and transaction pricing, and has become an important basis for safeguarding the legitimate rights and interests of buyers and sellers or third parties.

In China, clothing textiles that do not meet the GB18401-2010 national basic safety technical specifications for textile products are not allowed to be sold.

Textile fabric testing unit

Zhongke Testing. <>

Textile fabric testing standards.

Textile fabric testing standards.

Moisture absorption and quick-drying properties.

GB Assessment of Moisture Absorption and Rapid Drying of Textiles Part 1: Single Combination Test Method.

GB: Assessment of Moisture Absorption and Rapid Drying of Textiles Part 2: Dynamic Moisture Transfer Method.

Water resistance. GB T4745-2012 Wetting method for testing and evaluation of waterproof performance of textiles.

GB T4744-2013 Hydrostatic pressure method for testing and evaluation of waterproof performance of textiles.

Oil repellency. GB T21295-2014 Technical requirements for physical and chemical properties of clothing.

GB T19977-2005 Test on oil repellency and hydrocarbon resistance of textiles.

Easy decontamination performance.

GB T21295-2014 Technical requirements for physical and chemical properties of clothing.

FZ T01118-2012 Detection and evaluation of anti-fouling performance of textiles.

Antimicrobial properties. FZ T73023-2006 Antibacterial Knitwear.

FZ T62015-2009 Antibacterial Towel.

QB T2881-2013 Technical conditions for antimicrobial properties of footwear and footwear parts.

Evaluation of the antimicrobial properties of GB textiles Part 1: Agar dish diffusion method.

Evaluation of the antimicrobial properties of GB textiles Part 2: Absorption method.

Evaluation of the antimicrobial properties of GB textiles Part 3: Oscillation method.

Flame retardant properties. Flame retardant protection of protective clothing Part 1: Flame retardant clothing.

GB T17591-2006 flame retardant fabric.

GB T5455-2014 Determination of vertical damage length, smoldering and re-ignition time of textile combustion performance.

GB T14645-2014: Determination of the burning performance of textiles, the damage area in the 45° direction and the number of flame connections.

UV resistance.

GB T18830-2009 Evaluation of UV protection of textiles.

Thermal insulation performance. FZ T73022-2012 Knitted thermal underwear.

GB T11048-2018 Test method for thermal insulation performance of textiles.

GB T35762-2017 Test method for heat transfer properties of textiles: plate method.

In accordance with China's standards

Fabric inspection is divided into three aspects:

zhidi. First, the external quality inspection of the fabric, back to the specifications and size, defects, color and color answer, weft skew and other requirements;

Clause. 2. Physical indicators: yarn count, density, square meter weight, breaking strength, tear strength, slip resistance, washing size change rate, dry cleaning size change rate, pilling, light fastness, light sweat composite color fastness, hot color fastness, wet rubbing color fastness;

Clause. 3. Safety performance: formaldehyde content, pH value, decomposable aromatic amine carcinogenic dyes, color fastness to water, color fastness to perspiration, color fastness to dry rubbing, color fastness to saliva, peculiar smell, etc.

There is no set rule, it depends on which DU indicators you want to detect?

Basic Zhi energy: Strong, tearing DAO strength, pilling, electrostatic version, rebound power, ......

Dyeing fastness: rubbing fastness, sweat fastness, soaping fastness, water soaking fastness, sun fastness ......Please use the follow-up function instead of the supplementary function, otherwise, you may not be able to see my revised answer!!

Your question can be tested for pilling and strength, as well as regular colour fastness.

The friend above replied yes. Those are also object detection. There are also chemical tests, such as no azo or heavy metals. There are also chemical values such as pH value, and if the children's clothing is more stringent.

First of all, it is necessary to see whether it is a European standard or a national standard, and then determine the items and requirements to be tested.

Generally, the domestic compulsory testing items for skin type are a full set of national standard 18401 tests, and the ingredients can also be tested.

1.Put it in water, not much water absorption for fibers (except silk) 2Fibers that emit a chemical odor by burning them with fire.

3.More practical, touch by hand, smooth for fiber (except silk) 4Curl them up with your hands, and be untruthful for fibers.

5.With the eye, the ones that are too bright are the fibers.

6.Put it in the sun, absorb heat too quickly for the fibers.

This life experience only, for your reference!

A simple way to identify natural fibers is the combustion method,1Cellulose fibers such as cotton and linen, which burn without change, burn rapidly, and have the smell of burning paper Fine and light black or off-white powder;

2.Protein fibers, such as hair, silk, etc., melt, curl and shrink when burning, burn slowly, sometimes self-extinguishing, the most obvious is the smell of burning hair, crunchy small black slag;

3.Polyester Shrink and melt Burning, melting, black smoke Burning, emitting black smoke, easy to extinguish No special odor Hard and bright gray-black balls.

The difference between the combustion of other chemical fibers is not very large, just observe more.

Categories: Life >> common sense of life.

Problem description: Classification and identification of textile fibers

Analysis: Clothing (textile) materials - types and characteristics of textile fibers, textile fibers are the basic materials that constitute fabrics (we do not start with macromolecules), it has two categories: natural fibers and chemical fibers.

1. Natural fibers. Conventional natural fibers include cotton, linen, silk, and wool, and with the development of science and technology, new natural fibers have emerged, such as pineapple leaf fibers and bamboo fibers that are now commonly used. They are all high-quality textile fiber raw materials that nature has dedicated to us.

Cotton, hemp, bamboo, and pineapple leaf fibers are natural cellulose fibers, which are ignited with fire and quickly charred into ashes, accompanied by the smell of burning grass. Wool and silk fibers are natural animal fibers, which zoom after ignition and Xiaokai holds the smell of burning hair, among which silk fibers are the only long-fiber materials put into use, which can be up to several hundred meters, and the spider silk fibers that are now being studied should also be long-fibers, but they have not been put into practical use.

2. Chemical fibers. Chemical fiber is the rise of the chemical industry, and has become the main body of textile fiber.

It is divided into two main categories, one is synthetic fibers and the other is recycled fibers.

A. Synthetic fiber is made of petroleum as raw material by chemical polymerization, and the main fiber materials are polyester, nylon, acrylic, vinylon, polypropylene Qinglun, chlorine, spandex, etc. They can be cut into different lengths or used directly with filaments as required. Its uniform combustion is characterized by melting into droplets.

Polyester fiber has good rigidity, good shape retention and crispness, and is often blended with cotton and wool.

Nylon, also known as nylon, is a more elastic fiber material, and the most wear-resistant, often used as a garment "three", and often used in hosiery products, in recent years, nylon and viscose fiber intertwined to form a nylon viscose interwoven fabric.

Acrylic fiber is the best synthetic fiber for warmth, commonly known as synthetic wool, and is often used as a sweater material.

Vinylon hygroscopic performance is the best among synthetic fibers, the taking performance is close to cotton fiber, less civil, the grade is very low, usually used in industrial products, such as ropes, water hoses, fishing nets, etc.

Polypropylene has the lightest texture, with a specific gravity, and is currently the lightest material in textile fibers, which is wear-resistant, wear-resistant, and non-pilling.

Chlorine is not flammable, and is often used as a civilian product such as knitted underwear and wool, and is also used in industrial filter cloth, work clothes, insulating cloth, safety tents, etc.

Spandex is a fiber material with the highest elasticity, high elongation and high elasticity, and is often used as a tight-fitting product, but because it is not colored and has the lowest strength, it is generally rarely used as bare wire.

b. Regenerated fiber, also known as man-made fiber, is made of natural materials through pulping and spinneret, and is divided into regenerated cellulose and regenerated protein. Among them, the most commonly used is viscose (regenerated cellulose fiber), which has the main characteristics of cotton and linen, but the strength is lower than that of cotton and linen, and the wet strength is smaller. Regenerative proteins are used less, and chitin fibers are well established for use in today's medical fields.

From Long China Longma Textile Garment