国产在线一区二区三区av_蜜臀精品国产高清在线观看_国内精品一区二区三区在线观看_精品国产v无码大片在线观看

That is, the composite strength is very low or zero, can not meet customer requirements, resulting in product obsolescence. Due to the particularity of PE film production process, low surface tension, high content of smooth agent, surface pollution, etc., may lead to weak composite.

Vacuum bag is divided into transparent vacuum bag and aluminum foil vacuum bag, the composite material of the vacuum bag is PE plus nylon composite, nylon has good barrier performance, can effectively prevent moisture and gas, can keep the vacuum state for a long time, and ordinary plastic bags are just ordinary plastic, such plastic bags have holes on the surface, can not be vacuum-packed, even if barely packed, It will leak over time, even as soon as it is packed.

Printing equipment, printing methods, printing pressure and ink balance relationship factors;

Knowing the heat melt temperature of different materials of zip bags, mastering the heat sealing temperature

Respectively through the water vapor transmission capacity, oxygen transmission capacity test to verify, to prevent packaging material due to large transmission capacity, poor barrier, resulting in moisture, oxidation and deterioration of drugs.

The following four types of problems are often encountered in the processing of zipper bags:

Each color, to its counterpart, conveys different messages too. For example, products with white packaging convey simplicity, safety and purity. Color experts cite that more the color added to a product's package, less sophisticated the product is.

Clean, Clear and Straight-Forward Package Design

The safest plastic food storage containers are HDPE, LDPE, and PP plastics. These include juice and milk jugs, grocery bags, bread bags, produce bags, and food storage boxes. Food can be stored in these types of plastic containers without any toxins leaking.