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Material Characteristics Of Food Bags

Food bags as a packaged food packaging bags, in the material selection has its own characteristics, in the form of packaging and other bags compared to have their own unique characteristics.

For example, the raw materials of food bags can not be toxic and harmful, so it can only be polyethylene, polypropylene or aluminum foil and other materials as raw materials for processing, Food Bag for some potentially toxic raw materials, you can not use, such as PVC can not do The raw material for the food bag can only be used as an outer package for packaging, because in the case of temperature changes, it may produce harmful substances, food storage and quality protection is unfavorable.

Food bags can not be used when manufacturing waste plastic, Food Bag these things are harmful or unsanitary, can not be used as a raw material for food bags.

The main material of the food bag is generally PE polyethylene PP polypropylene, food bags widely in the food package production of food bag manufacturers must have QS certification;

1, synthetic resin

Almost all of the plastic used synthetic resin. Resin is the most important component of plastic, plays the role of adhesive, plastic can be cemented into other parts of the overall. Although the addition of various additives can change the nature of the plastic, but the resin is to determine the type of plastic, Food Bag performance and use of the fundamental factors.

In the plastic decorative materials commonly used in the types of resin are:

Polyethylene (PE), polyvinyl chloride (PVC), polystyrene (PS), phenolic (PF), urea (UF), epoxy (EP), polyester (PR), polyurethane (PU), polymethyl Methyl acrylate (PUMA), silicone (SI), and the like.

In accordance with the heat changes occur when the different synthetic resin can be divided into two kinds of thermoplastic resin and thermosetting resin.

2, thermoplastic resin

It is a function of heat softening, cooling hardening, and no chemical reaction, regardless of how many times the heating and cooling are repeated, can maintain this performance. Where the thermoplastic resin with its molecular structure are linear. It includes all polymeric resins and partially condensed resins. Food Bag The thermoplastic resins include polyethylene, polyvinyl chloride, polystyrene, polyamide, polyoxymethylene, polycarbonate, polyphenylene oxide, polysulfone, rubber and the like. The advantages of thermoplastic resin processing is simple, with high mechanical energy.

3, thermosetting resin

Resin heating after chemical changes, gradually hardening molding, and then heat does not soften, can not dissolve. Thermosetting resin its molecular structure for the body, which includes most of the condensation resin, thermosetting resin has the advantage of high heat resistance, Food Bag compression is not easy to deformation. The disadvantage is poor mechanical properties. Thermosetting resins are phenolic, epoxy, amino, unsaturated polyester and silicone ether resins.