Professional knowledge of Golden Sunshine Group Packaging plastic bag Industry-Materials Factory Suppliers Manufacturers Quotes

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Professional knowledge of Golden Sunshine Group Packaging plastic bag Industry-Materials


1.OPP, also known as "biaxial tensile polypropylene", is a colorless, non-toxic material, similar to polyethylene, but more transparent and lighter than polyethylene, with a density of 0.91.

Characteristic:

(1)Stable size and high gloss and transparency

(2)Mechanical strength, folding, moisture resistance and cold resistance are better than ordinary materials.

(3)Heat is not easy to bond, so it is used for printing.

(4)The surface is not easy to scratch, but the heat sealing effect is the worst.

(5)Scope of application: food packaging and clothing packaging bags.

 

2.PP,Chemical name is polypropylene, blow molding method processing, mechanical energy, impact strength is better than OPP,CPP

Characteristic:

(1)The transparency is not as good as the uniformity of OPP, thickness.

(2)Poor printing effect for OPP, for packaging products that require transparency but are not high

(3)Heat sealing effect is better than OPP

 

3.PE,Also known as LDPE, chemistry is called low density polyethylene

Characteristic:

(1)Material is relatively soft, toughness is very good

(2)The size is unstable and the printing effect is worse than that of OPP.

(3)Heat sealing is the best in packaging materials

(4)Often used in the innermost layer of plastic bag with handles and compound bag.


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