Product Introduction With the constant breakthroughs and improvements in Internet technology and e-commerce platform trading methods, it is no longer difficult to buy fruits and vegetables, fresh and frozen food online. Have you ever noticed, if it is online shopping seafood raw meat or even part of the need to preserve the freshness of the fruit, online merchants will put a few ice packs in the box of foam to keep fresh? Because in the huge market of fresh food, e-commerce companies to attack the city, you have to face the international logistics industry known as the field of "Mount Everest" zone of the "cold chain logistics" problem, the degree of freshness of the food and their own sales are closely related to The degree of food preservation is also closely related to the sales volume of its own commodities. At this time, this an inconspicuous ice bag has become an important part of the cold chain transportation. The water-absorbing material used for making ice packs is a…