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目前显示的是 四月, 2019的博文

The Work Principle Of Spray Rating Tester

Spray Rating Tester is designed to determine the surface wetting resistance of any fabrics, which may or may not have been given a water-repellent finish. It is not intended to predict waterproofness, since it does not measure the penetration of water through fabric.The instrument comprises a stainless steel framework, incorporating a funnel. The spray nozzle is mounted on the neck of the funnel. The precision spray nozzle contains 19 holes - one central hole surrounded by two concentric rings of 6 and 12 holes respectively. A specified volume of distilled water is sprayed on to the test specimen, and its spray rating is determined by comparing the appearance of the specimen with descriptive standards or the AATCC Spray Test Rating Chart.The specimen holder is a particular feature of our Spray Rating Tester , facilitating rapid and secure mounting of specimens, in the correct position, on the instrument. A specified volume of distilled water is sprayed on to the test specimen, ...

Advantages and Application of Leather Friction Fastness Test Machine

The Leather Friction Fastness Test Machine  is designed to carry out a rub fastness test on the surface of leather or coated fabrics to determine the marring of the surface finish and to assess the amount of color transfer from the sample to the rubbing pad.This instrument is suitable for leather, textile, belt, trademarks, cardboard and other friction materials by foreign object damage and decoloring. Advantages: 1. Speciality in testing equipment 2. Various products to choose from 3. Accept customization 4. Excellent after-sale service Application Leather friction color fastness tester applied to test leather property in shoes, clothing, luggage handbag industry, research laboratories; commodity inspection, arbitration and technical supervision departments.Leather friction color fastness tester test the degree of decolorization of dyeing leather after friction. It can used to test the leather color resistance to dry, wet and friction. Read more on http://www.qin...

How to do the fabric abrasion test ?

Samples   Selection: Cut   a sample from different parts of the entire width of fabric and, the sample to be representative. If it is fancy fabric sample,   which should include all the different organizations and cloth made from color rendering. Remove the load and the upload the shaft from the  Fabric Abrasion  test machine Remove the top plate and the test fixture Loosen the retaining ring on the  Fabric Abrasion tester   test fixture, scored tablet sample, the sample is placed in a test fixture base. When the test fabric is not more than 500 g / m2, put the polyester foam pad between a sample and the sample holder with the metal block body; greater than 500 g / m2, or when the composite fabric, foam pad is not required. Each specimen holder on the sample should be the same tension; Device to Sheep blankets and cloth friction; Place the Felt and abrasive   on Grinding station, put heavy   Tuo   shi   on abrasiv...

Universal Leather Friction Color Fastness Test Method

The Universal Leather Friction Color Fastness Tester is designed to carry out a rub fastness test on the surface of leather or coated fabrics to determine the marring of the surface finish and to assess the amount of color transfer from the sample to the rubbing pad under dry friction and wet friction. Universal Leather Friction Color Fastness Tester  Leather Friction Color Fastness Tester  Testing Method: When testing, place the instrument on the felt. Dry Friction   1 The used side of the sample faces upward, stretched in the sample holder without wrinkles. Tighten the sample clip and place it between the long hole and felt in the base of the instrument. Use the screw of the long hole in the base of the instrument to fix the sample clip.     2 Wrap the friction pad on the rubbing head tightly and fix the rubbing pad in the spring groove of the rubbing pad.   3 Return the rubbing head with friction pad wrapped back to the machi...

Different forms and influence factors of Abrasive wear

    Abrasive wear takes place when a rough, hard surface glides across a surface that is relatively softer.Abrasive wear can be divided into two groups: two-body and three-body abrasive wear. In the three-body abrasion, the particles formed during the operation or coming from outside the system cause the abrasive wear, whereas in two body, one of the materials plays the role of the abrasive.    Abrasive wear has three different forms: microcuting, wedge forming and ploughing . During operation of a system, transition from one mode to another may happen and modes can act simultaneously. In the ploughing mode, a shallow groove is formed and repeated loading is necessary to form a wear particle. In the wedge forming, the wedge type of wear debris is formed. In the microcutting mode, long, curled ribbon-like particles are generated. The shape of the abrasive particle, the hardness, the load and the shear strength at the contact interface determine the state of the abra...

What is air permeability?

Air permeability measures how easily air is passed through fabric. It indicates the breathability of weather-resistant and waterproof fabrics and is an important factor in the performance of materials like industrial curtains, sails, airbags and parachutes. The main influences on air permeability are the density of the material and its structure. Fabrics can be coated to modify their air permeability. The test method mainly consists of two kinds: constant pressure difference measurement and constant flow pressure difference. The constant pressure difference measurement method is to keep the constant pressure difference on both sides of the sample, and calculate the air permeability of the sample through testing the air flow of the sample in a certain time.  The principle of constant flow pressure difference is to keep the air flow constant through the sample, and through the test, the pressure difference on both sides of the sample is tested, and the air permeability of the sa...