Ozone is mainly present in the ozone layer in the lower part of the stratosphere 20 km away from the surface of the earth. It can absorb short-wave ultraviolet rays harmful to the human body, and it also has the characteristics of disinfection, toxicity and corrosivity. Ozone in the air is also a major cause of rubber cracking. Ozone attacks the carbon-carbon double bonds of elastomers and creates cracks on the surface. Usually we use the Yashilin ozone aging test chamber to simulate and strengthen the ozone conditions in the atmosphere. Identify and evaluate the anti-ozone aging performance of rubber and the anti-ozonant protection effectiveness method, and then take effective anti-aging measures to improve the service life of rubber products. Rubber products such as vulcanized rubber, thermoplastic rubber, cable insulation and other products.
According to the test method and standard, it can be divided into “static†and “dynamicâ€. Static means that the sample is stretched and placed in the ozone aging test chamber for testing. The dynamic is to place the sample on the fixture of the test chamber while stretching. While testing, the stretching float is about 5%-45% of the sample itself.
Ozone aging test chamber related parameters:
Equipment model: QL-100, QL-250, QL-500, QL-010
Temperature range: 25 ° C ~ 40 ° C
Humidity range: 30% to 65% RH
Ozone concentration: 50 ~ 1000pphm / 50 ~ 300ppm
Manufacturer: Beijing Yashilin Testing Equipment Co., Ltd.
Copy paper
Copy paper is the most consumed material in xerographic copiers and the embodiment of copy quality. In daily work, copy paper is used most frequently.
The quality of copy paper will directly affect the speed of work efficiency and the appearance of text.
The main brands are APP, Tianzhang, Yatai, etc.
The paper can be white or color. Most laser printers are designed to use paper weighing about 70-90 grams per square meter,
and the raw material is 100% pure wood pulp.
When we buy copy paper, we mainly refer to the following aspects: thickness, density, stiffness, and luminosity. If this is four degrees, we will buy copy paper that suits us. Everyone uses different places, so they have different requirements for paper.
Some need to use good paper, and some need to be simple and usable. Thickness refers to how many grams we usually say, density refers to the density and thickness of the paper, the denser the thinner the better, the stiffness refers to the hardness of the paper, the stiffness is high, the paper is hard, and the brightness refers to The surface finish of the paper.
Copy Paper,Carbon Copy Paper,Laser Copy Paper,Colored Copy Paper
Shijiazhuang Qiancen Industry Co.,ltd , https://www.yuyilang.com