FYI Tester Instrument

  Definition and overview of universal testing machine The universal testing machine is also called a tensile testing machine. It is an instrument used to conduct static load, tensile, compression, tearing, peeling and other mechanical property tests on various materials. It is suitable for testing various physical and mechanical properties of plastic sheets, pipes, special profiles, plastic films and rubber, wires and cables, waterproof membranes, metal wires and other materials. Its use industries include: scientific research institutes, commodity inspection and arbitration institutions, colleges and universities, as well as rubber, tires, plastics, wires and cables, shoemaking, leather, textiles, packaging, building materials, petrochemicals, aviation and other industries, for material development and physical property testing , teaching research, quality control, incoming material inspection, random inspection of production lines and other indispensable testing equipment. As an...

The melting point is the temperature at which a solid changes (melts) its physical state from solid to liquid. The temperature at which the opposite action occurs (ie, changes from liquid to solid) is called the freezing point. Unlike boiling point, melting point is slightly affected by pressure. In most cases, the melting point of an object is equal to the freezing point. Melting point test principle The principle of melting point testing is based on the fact that substances exist in different physical states (solid, liquid and gaseous) at different temperatures. When a substance is heated to its melting point, its solid structure begins to destroy, and molecules or atoms begin to move in space, changing from solid to liquid. The principles of melting point testing can be summarized into the following aspects: Molecular/Atomic Interactions: The melting point of a substance depends on the interaction forces between its molecules or atoms. In the solid state, molecules or atoms maintain...

Air permeability is a widely used test that measures the ease with which air can pass through a fabric and helps to indicate the air permeability of the fabric, especially for wind-proof, weather-resistant, and water-resistant fabrics. YG461F Fully Automatic Air Permeability Tester is used to determine the air permeability of fabric automatically. The wide measuring range covers all kinds of knitted, woven, non-woven, coated fabrics, paper, film, leather, etc. Test principle Test principle is: according to the specified standards and test parameters, the specimen is secured into the test head of clamping system without distortion and minimal leakage, and then the suction system adjusting the airflow rate that preferably provides specified pressure differentials between the two surfaces of the specimen being tested, and then the air permeability of the specimen is measured. Air permeability refers to: under the specified pressure difference between the two sides of the fabric, the air f...

The hydrostatic pressure resistance index is one of the most important indicators of waterproof and breathable fabrics. Hydrostatic pressure refers to the resistance water encounters as it passes through fabric. Under standard atmospheric pressure conditions, the fabric is subjected to continuously rising water pressure. Until water droplets seep out from the back of the fabric, at this time, the measured water pressure value is the hydrostatic pressure. The more hydrostatic pressure a fabric can withstand, the better its waterproofness or resistance to leakage. The units expressing hydrostatic pressure are N/m 2 ，kPa and water column height m. The conversion relationship is that the height of the water column of 1m is equal to 9. 82 kPa. Paragraph. 单击此处进行编辑. Hydrostatic pressure tester The YG812 digital water permeability tester uses the spray method to measure the permeability of materials. Clamp the sample in the fixture of the test bench, and inject a certain amount of water throug...

  Fabric dimensional stability refers to the shortening or elongation of fabric length during wearing, washing, storage, etc. Among them, shrinkage is one of the most concerning phenomena. The shrinkage of the fabric not only affects the appearance of the fabric, but may also cause a decrease in performance. Only in this way can it be possible to sew clothes that fit well and are not deformed. Definition Shrinkage is a phenomenon in which the length or width of textiles changes after washing, dehydration, drying and other processes in a certain state. The shrinkage of fabric refers to the percentage of fabric shrinkage after washing or soaking in water. The smallest shrinkage rate is for synthetic fibers and blended fabrics, followed by woolen fabrics, linen fabrics, and cotton fabrics in the middle. Silk fabrics have a greater shrinkage, and the largest shrinkage rates are viscose fiber, artificial cotton, and artificial wool fabrics. Fabric shrinkage test process (depends on ISO ...

  The moisture regain of textile materials when they reach equilibrium under standard atmosphere is called standard moisture regain. The actual moisture regain of each fiber and its products varies with temperature and humidity conditions. In order to compare the moisture absorption capacity of various textile materials, the moisture regain (standard moisture regain) measured after a specified period of time (equilibration) under uniform standard atmospheric conditions is compared. Calculation formula Moisture regain is the difference between the wet weight and dry weight of the sample as a percentage of the dry weight. Suppose the dry weight of the sample is G0 and the wet weight of the sample is G, then the moisture regain W is W=(G-G0) / G0 × 100% Factors affecting moisture regain rate Internal factors The role of hydrophilic groups: In fiber molecules, the number of hydrophilic groups and the strength of hydrophilicity can affect its hygroscopic performance. The more hydrophili...

  What is yarn count? Yarn count is a number which indicates the mass per unit length or the length per unit mass of yarn. Classification Generally, there are four representation ways of yarn count: Tex, Denier, Ne and Nm. Tex and denier belongs to the mass per unit length system, and Ne and Nm belong to per unit mass of length system. Calculating methods of yarn count ​ Tex:  The yarn count in the Tex system is the weight in grams of 1000m of yarn. Tex is usually used to express the count of natural material yarn. It is decimal and employs metric units. Ttex=(m/L)*1000 Where, m = The weight of the sample, g L = The length of the sample, m Denier:  The count of yarn in the denier system is the weight in grams of 9000m of yarn. Denier is usually used to express the count of chemical fibers and filament. Td=(m/L)*9000 Where, m = The weight of the sample, g L = The length of the sample, m In the mass per unit length system, the yarn count is the number of “units of weight” p...