PU is an artificial leather with the main advantages of long service life, good oil resistance and waterproof. This material looks very similar to cowhide material, looks high-grade, and is relatively easy to care for, and the price is lower. PU Luggage: the built-in drawbar is made of high-purity aluminum alloy for high strength. Wheel: It is made of high-strength and hardness PC material, which absorbs sound and has strong wear resistance. Travel Suitcase,Pu Luggage,Pu Suitcase,Travel Pu Luggage China Amulite Sunrising Luggage &Bag Products Group , https://www.chinabluesunrising.com
(1) Environmental protection: Mainly refers to whether the glue added inside is lysaldehyde or triamide, the latter is very environmentally friendly, but this is not very good for the average customer, the smell is not right, some are long-term, There is no taste. Some are sealed for a long time, and there is a taste. Now the weather is big and the taste is much bigger. The better way is to combine the inspection report and the logo on the wrench. It is not acceptable to see the inspection report. Because a factory will produce different grades of boards, the inspection report will not necessarily be this grade. Combined with the level mark on the board, it looks a lot. In general, manufacturers and merchants can introduce indiscriminately, and bills can be opened indiscriminately. The mouth can say that it can not be recognized, and it can be said that it is wrong on the paper. Doing, playing on the product is not as simple as redoing.
(2) Physical properties: such as gripping force, resistance to deformation, strength, etc. People who don't understand this thing are not very well recognized. Generally, they are recognized from the following: the particles of the moisture-proof board should not be too large, so the strength is not enough, and it should not be too small. This may be wood chips. Cut open to see the section (to be irregular, can not see flat), see there are not many needle-like sheets.
(3) Moisture resistance: This is a worse judgment. Only take a different brand and take it home to soak. 　
The inner lining is treated with PA coating and is waterproof and breathable. In particular, the shock absorber trolley case is better, and the built-in shock absorber is made of PBT car gear material, which is light in weight and high in hardness.
Determine the quality of the moisture-proof board, generally divided into three aspects: