For such a big brand, it is undoubted that it must be g […]
For such a big brand, it is undoubted that it must be grasped from the most basic. Let me tell you how strict the textile fabrics are! !
The routine textile testing items are as follows:
1, color fastness:
Color fastness is one of the important quality indicators of textiles. The so-called color fastness refers to the degree to which the dyed textiles are kept strong under physical and chemical action, that is, the degree to which the color of the dyed textile is affected by external influence is called the color fastness. The color fastness of the white cloth was judged by the color change of the sample after the test. The color fastness index is mainly divided into 10 test items such as color fastness to washing, dry rubbing fastness, wet rubbing fastness, and light/sweat color fastness. The dyeing fastness of normal fabrics is generally required to reach 3 to 4 to meet the needs of use.
1.1 Rubbing fastness The rubbing fastness refers to the degree of discoloration of the dyed fabric after rubbing, and can be divided into dry friction and wet friction.
The rubbing fastness is based on the degree of white cloth staining. It is divided into 5 grades (1~5). The larger the value, the better the rubbing fastness is, the better the grade 1 and the best.
The service life of fabrics with poor rubbing fastness is limited. Internationally, the test methods for rubbing fastness mainly have the following four standards: (1) ISO105-X12-2001 textile rubbing fastness method
(2) GB/T3920-1997 textile color fastness test color fastness to rubbing (national standard) (3) AATCC8-1996 color fastness to rubbing (American standard) (4) JIS L0849-1996 color fastness test method ( Japanese standard)
1.2 Sun fastness (light fastness) Light fastness refers to the degree to which a colored fabric is discolored by sunlight. The test method can be carried out by using both sunlight and sunlight. The degree of fading of the sample after exposure is compared with the standard color sample, which is divided into 8 grades, 8 grades are the best, and grade 1 is the worst. Fabrics with poor light fastness should not be exposed to sunlight for a long time, and should be placed in a ventilated place to dry.
1.3 Wash fastness Washing or soaping fastness refers to the degree of color change of dyed fabric after washing with washing liquid. Gray graded sample cards are usually used as the evaluation standard, that is, the color difference after fading of the sample and the sample is used for evaluation. Washing fastness is divided into 5 grades, 5 grades are the best, and grade 1 is the worst. The fabric with poor washing fastness should be dry-cleaned. If wet washing, double the washing conditions, such as the washing temperature should not be too high, the time should not be too long, etc.
1.4 Perspiration fastness Perspiration fastness refers to the degree of discoloration after dyed fabric is dipped in sweat. The perspiration fastness is not the same as the artificially prepared sweat composition, so it is generally combined with other color fastness to evaluate it. The perspiration fastness is divided into 1~5 grades. The bigger the value, the better.
1.5 Ironing fastness Ironing fastness refers to the degree of discoloration or fading of dyed fabrics when ironing. This degree of discoloration and fading is assessed by the iron staining of other fabrics at the same time. The ironing fastness is divided into 1~5 grades, 5 grades are the best, and grade 1 is the worst. When testing the ironing fastness of different fabrics, the test iron temperature should be selected.
1.6 liters of fastness to sublimation The sublimation fastness refers to the degree of sublimation of dyed fabrics during storage. Sublimation fastness The gray grading sample card is used to evaluate the discoloration, fading and white cloth staining of the fabric after dry hot pressing treatment. It is divided into 5 grades, 1 grade is the worst, and 5 grades are the best. 2, wear resistance
It is the ability of the material surface to resist wear. It is related to the hardness and strength of the material. The Martindale abrasion tester is often used internationally to determine the abrasion resistance of textiles.
3, fabric break strength, tear strength
It is the physical and mechanical properties of the fabric from the perspective of the fabric yarn. The warp direction in the warp or weft direction (take a certain width) of the fabric, the strength at which the yarn is completely broken (while giving the elongation at break), and the breaking strength of the fabric. The breaking strength is required to be greater than 200 Newtons (common standard: ISO 13934.1). The tear strength refers to the maximum external force required for the yarn to break in the order of the fabric when the tear has been made (the common standard is: ISO pass foreign 9290).