Misunderstanding of floor leather use

The first is the pursuit of foreign goods. Needless to say, for a long time, the floor leather market was occupied by low-grade bottomless lining grass produced by South Korea, Taiwan and other overseas countries, giving consumers a wrong message - the quality of domestic floor leather is not enough. In fact, after inspection of these overseas products, the surface wear-resistant layer is only 0.06 mm, which is made of poorly processed and recycled PVC. It does not meet the foreign standards for plastic coil flooring, so its short life and use. uncomfortable.

Second, I like to choose soft floor leather. In fact, 7 of the 8 inspection indexes of floor leather abrasion resistance, water resistance, stain resistance and flame resistance are improved with the hardness of the floor leather. Therefore, the expert construction: When purchasing the floor leather, as long as the surface layer meets the wear resistance requirements, it is not necessary to be demanding softness, so as to facilitate the comprehensive improvement of other properties.

Vacuum rotary evaporator


The purpose of the rotary evaporator rotovap is to remove low boiling organic chemicals, usually solvents, from a mixture of compounds .

The rotary evaporator always for distillation and extraction under vacuum pressure . The motor runs the rotation flask moving and heating water oil bath pass hot energy to the mixture of rotary flask . Then low boiling point of mixture will be heated and form a thin film and make evaporation . The lower boiling point mixture make morphological change from liquid to Vapor or hot air . Then hot vapor meet condenser cooling coil then become liquid again and fall down to collection flask .


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