Product material inspection report
Item specifics
- Period
- 2023/8/16 - 2050/9/30
- Certification bodies
- Tianfang Standard Technology Company
Certificate description
Product material inspection, in line with standards
We are familiar with fabric testing such as ISO, SGS, Oeko-Tex Standard 100, BV certification, etc. We have a certain understanding of the certificates obtained from these inspections, but we may not know much about the items tested for fabrics. The following articles will explain the specific items of fabric testing.
The testing of fabric products generally consists of six major items and multiple small items.
physical properties
Density, yarn count, weight per square meter, spinning yarn twist, spinning yarn strength, fabric structure, fabric thickness, loop length, fabric cover factor, fabric shrinkage or weaving shrinkage, warping deformation, tensile strength , tearing strength, seam slippage, seam strength, adhesive strength, single yarn strength, unit linear density strength of spinning yarn, anti-snagging, crease recovery angle test, stiffness test, water repellency test, waterproof Leakage, elasticity and resilience, air permeability, water vapor permeability, flammability of general garments, flammability of children's evening wear, bursting strength, abrasion resistance test, pilling resistance, etc.
Yarn count: refers to the thickness of the yarn, represented by Ne, which is defined as a multiple of 840 yards of the length of a 1-pound cotton yarn at a specified moisture regain of 9.89%.
Density: the number of spinning yarns per INCH.
Weight per square meter: The weight in ounces per square yard of cloth or the weight per square meter of cloth per square meter.
Tensile strength: The force used when a fabric of a certain size is stretched to break at a constant rate by a tensile strength machine is the measured tensile strength. The tensile strength test includes grab sample method and strip sample method, and the specific test method is selected according to different test standards and customer requirements.
Tear strength: A sample of a certain size is clamped on the tear strength tester, and a cut is cut in the middle to determine the tearing direction. The tear strength tester adopts the pendulum drop method to tear the sample from the cut. The force used is The measured tear strength.
Seam slippage: After folding a fabric of a certain size, suture it along the width direction, cut it at a certain distance from the suture, and use a tensile strength tester to stretch it at a constant rate to a certain suture opening. The opening distance when stretched to a certain strength is the seam slippage we measured. There are two methods of seam slippage measurement: fixed opening force measurement and constant force measurement opening. The specific test method is selected according to different test standards and customer requirements during the test. Seam slip is generally only used for testing woven fabrics.
Seam strength: same as seam slippage, the force used to break the suture by stretching at a constant rate using a tensile strength meter is the measured seam strength, and seam strength can be carried out simultaneously with seam slippage. Generally only used for testing woven fabrics.
Bursting strength: Under certain conditions, an expansive expansion force is applied to a flat fabric at an appropriate angle until it ruptures. This force is the bursting strength.
Wear-resisting: Under the known pressure, rub the sample and the standard friction cloth installed on the sample holder against each other in a certain trajectory under a certain pressure until the number of broken yarns or holes required by the customer appears in the fabric , record the number of frictions at the end of the experiment, which is the measured wear resistance value.
Anti-pilling: Roll and rub the fabric under certain conditions for a certain period of time to observe its surface pilling. Pilling refers to the pompom clusters formed by entangled fibers standing on the surface of the fabric. Pilling refers to the roughness and unevenness of the fibers on the surface of the fabric and (or) the fluffing of the fibers, resulting in a change in the appearance of the fabric. The fuzzing and pilling is evaluated by the rating sample photo or the original comparison.
Color fastness
Dyeing fastness to soaping (small sample), dyeing fastness to rubbing, dyeing fastness to chlorine water, dyeing fastness to non-chlorine bleaching, dyeing fastness to dry cleaning, actual washing dyeing fastness (garment, fabric), dyeing fastness to perspiration, dyeing fastness to water, dyeing fastness to light, dyeing fastness to seawater, and dyeing fastness to saliva.
Dye fastness to washing: the test piece and the standard adjacent fabric are sewn together, washed, washed and dried, and washed under the appropriate temperature, alkalinity, bleaching and rubbing conditions, so that the test can be obtained in a short time result. The friction between them is accomplished through the tumbling and impact of a small bath ratio and an appropriate number of stainless steel balls, and the gray card is used for rating to obtain the test results. Different test methods have different temperature, alkalinity, bleaching and friction conditions and sample size, which should be selected according to test standards and customer requirements. Generally, the colors with poor washing and dyeing fastness include green orchid, brilliant orchid, black scarlet, navy blue and so on.
Dyeing fastness to dry cleaning: the same as the dyeing fastness to washing, except that washing is changed to dry cleaning.
Dyeing fastness to rubbing: put the sample on the rubbing fastness meter, and rub it with a standard white cloth under a certain pressure for a certain number of times. fastness. The color stained on the standard rubbing white cloth is graded with a gray card, and the obtained series is the measured rubbing fastness. The dyeing fastness to rubbing needs to be tested by dry rubbing and wet rubbing, and all the colors on the sample must be rubbed.