(4) Color fastness Dyeing fastness is the quality requirement for dyed and printed fabrics. Because dyed fabrics may cause color change or discoloration due to light, sweat, friction, washing, ironing, etc. during wearing and storage, which affects the appearance of the fabric or clothing. The nature or degree of the variation of the dyeing state can be expressed by the dyeing fastness. The dyeing fastness of the fabric is related to the fiber type, yarn structure, fabric structure, printing and dyeing method, dye type and external force. It can be divided into sunlight fastness, washing or soaping fastness, rubbing fastness, perspiration fastness, ironing fastness and sublimation fastness. 1. Fastness to sunlight Sunlight fastness refers to the degree of discoloration of colored fabrics by sunlight. The test method can be either sun exposure or daylight exposure. The fading degree of the sample after exposure is compared with the standard color sample. It is divided into 8 levels, 8 is the best, and 1 is the worst. Fabrics with poor fastness to sunlight should not be exposed to sunlight for a long time, and should be placed in a dry place in a ventilated place. 2. Washing fastness Washing or soaping fastness refers to the degree of color change of dyed fabric after washing with washing liquid. The gray graded sample card is usually used as the evaluation standard, that is, the evaluation is based on the original sample and the color difference after the sample fades. Washing fastness is divided into 5 grades, grade 5 is the best, grade 1 is the worst. Fabrics with poor washing fastness should be dry-cleaned. If wet washing is performed, pay attention to the washing conditions. For example, the washing temperature should not be too high or the time should not be too long. 3. Rubbing fastness Rubbing fastness refers to the degree of discoloration of dyed fabric after rubbing, which can be divided into dry rubbing and wet rubbing. The rubbing fastness is evaluated by the degree of staining of the white cloth, which is divided into 5 levels (1 to 5). The larger the value, the better the rubbing fastness. The service life of fabrics with poor rubbing fastness is limited. 4. Perspiration fastness Sweat fastness refers to the degree of discoloration of dyed fabrics after soaking in sweat. The perspiration fastness of sweat is not the same as that of artificially formulated sweat, so in addition to the individual determination, it is also combined with other color fastness to assess. The perspiration fastness is divided into 1 ~ 5 grades, the larger the value, the better. 5. Ironing fastness Ironing fastness refers to the degree of discoloration or discoloration of dyed fabrics during ironing. The degree of discoloration and discoloration is evaluated by the iron's staining of other fabrics at the same time. Ironing fastness is divided into 1 ~ 5 grades, 5 grades are the best and 1 grades are the worst. When testing the ironing fastness of different fabrics, the temperature of the test iron should be selected. 6. Sublimation fastness Sublimation fastness refers to the degree of sublimation that occurs in dyed fabrics during storage. The sublimation fastness is evaluated by the grey grading sample card to evaluate the discoloration, discoloration and staining of the white fabric after dry heat press treatment. It is divided into 5 grades, with 1 being the worst and 5 being the best. The dyeing fastness of normal fabrics is generally required to reach 3-4 to meet the needs of wearing. -------------------------------------------------- ------------------------------ - (1) Gas content Clothing materials are mostly fiber products. Because the yarns constituting the fabric have elasticity, there are many weaves in the fabric structure. Usually there are air in these weaves. Air is also contained in the yarn and between the fiber assemblies. This property is called the air-bearing nature of the fabric, and these weaves and spaces are called stomata. The size and presence of pores are related to the breathability, thermal conductivity and wettability of clothing materials. Factors that affect the gas content of fabrics include fiber type, yarn thickness, fiber direction, tissue type, thickness, square meter weight, post-processing and sewing. 1. Fiber properties The shape and size of the pores contained in different types of fibers are different, so the air permeability will also be different, reflected on the fabric, and its degree of warmth and ventilation will be different. In general, natural fibers have good gas content, and synthetic fibers have poor gas content. Wool fibers have the best gas content. 2. Fabric properties Air permeability is a superior characteristic of textiles, and general wool fabrics have good air permeability. This is because the wool fiber has good air permeability, and the wool yarn can be woven into a multi-void fabric structure, which greatly increases the air content in the fabric, reduces the heat conduction probability, and improves the warmth and cold resistance. the reason. 3. Detection method The gas content of clothing materials can be expressed by the gas content, that is, the percentage of air in a certain volume. Gas content (%) = (SP) / S X 100 In the formula, S-volumetric mass of fiber (g / cm3) P——apparent volume mass of material (g / cm3), P = FW / d (g / cm3) FW-square meter weight (g / cm2), d-thickness (cm) From the above formula, as long as the square weight, thickness, and fiber specific gravity of the fabric are measured, the air content can be obtained. Made of supreme quality EVA material, water resistant, moisture proofing and dust-proof. 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-Release time: 2005-10-19 22:25:42
3. Health care performance Health care performance is one of the important performance of clothing materials. It includes the climatic properties of clothing when the human body wears clothing—comfort and protective properties of clothing—safety and protection. The performance related to clothing comfort is hygroscopicity, thermal insulation, air permeability, breathability, thermal conductivity, etc., and the performance related to safety protection is the skin's anti-injury, anti-insect, anti-mold, anti-bacterial and Antistatic and antifouling properties.
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Comfortable fuzzy lining, soft shock absorbing protection against minor bumps drops and shocks, reduce damages caused by accidentally bumping.
Durable metal zipper, smooth but strong 360.degree zipper, provides durability and a long-lasting performance.
December 29, 2020