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Characteristics of several important plastic materials for packaging

1. Polyethylene terephthalate (PET) Compulsory TERephthalate is a plastic material.

PET advantages: plastic has the characteristics of light weight, high transparency, impact resistance and not easy to break, etc., but also can prevent carbon dioxide gas, so that soda can keep "gas", good preservation, emphasizing heat resistance, pressure resistance and other functions of the technical trend of PET bottles become today's drinking packaging.

Many drinks that need high temperature bacteria to be filled, such as flavored water, juice, dairy products, drinks, sports drinks, etc., have also been packaged by PET bottle successively, and PET bottle has become the packaging material of drinks.

PET bottles, due to their low environmental pollution and energy consumption, are gradually replacing traditional packaging materials in today's environmentally friendly world.

With its heat, pressure and other functions, nearly replace PVC bottles, bags, aluminum cans, iron cans, glass bottles, and so on, as the most growth potential of packaging materials.

Wuxi Shengma said: PET transparency, the bottle body has a soft, can pinch concave but harder than PP.

Mainly used for beverage bottles, cosmetics packaging.

Basically the transparent bottle you see is made of PET.

2.PVC.

Belongs to the general thermoplastic plastics, generally can be divided into soft and hard two kinds.

PVC has strong plasticiability, good decoration, printing performance, high light transmittance, good chemical stability and mechanical properties.

Light PVC is mainly used in the production of film, various packaging bags;

Hard PVC can be made into various bottles, cups, plates, boxes and other containers, but not suitable for packaging food.

3.Polypropylene (PP).

Ductile plastics, the lightest of all plastics.

Its tasteless, non-toxic, mechanical can be higher than polyethylene, impact resistance, wear resistance, corrosion resistance and insulation, and has a good tensile strength, heat resistance and gas barrier.

Polypropylene plastic can be used for blow molding and vacuum molding to manufacture all kinds of bottles, cups, plates, boxes, packaging film, woven bags, packing tape, etc., and has the advantages of corrosion resistance, no mildew, light weight, folding resistance and cheap price.

Bidirectional tensile polypropylene film can replace cellophane for packaging candy and food, the cost is lower than cellophane.

Polypropylene plastic is not suitable for use in flavorful packaging of goods, nor for long-term storage of vegetable and mineral oils.

4.Polystyrene plastics (PS).

Belongs to the hard plastic, its rigidity, printing performance is better, the surface is full of luster, chemical corrosion resistance is strong, non-toxic, tasteless, is a kind of light, high strength of good packaging materials.

In the packaging industry, plastic injection molding of modified polystyrene is commonly used to manufacture various barrels, deep cups, plates, boxes and other packaging containers, but also made of stretched polystyrene and styrofoam shallow cups, plates, boxes and other packaging containers, suitable for holding food, acid or alkali.

Foamed plastic made of polystyrene with foaming agent can be used as buffer packaging material for instruments, instruments, television sets and advanced electrical products.