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These are common materials in food packaging, how much do you know?

December 23, 2022

1. Kraft paper

Kraft paper is usually yellow-brown in color, and half-bleached or fully bleached kraft pulp is light brown, cream or white. Using kraft softwood pulp as raw material, it is made on fourdrinier paper machine after beating. Kraft paper has the advantages of recyclability, easy degradation and high tear resistance, and is an environmentally friendly paper. It is widely used in various packaging products, such as paper bags, handbags and gift boxes.


2. PET

PET, namely polyethylene terephthalate, commonly known as polyester resin, is the most important variety of thermoplastic polyester. It has good toughness and non-toxic stability, resistant to most solvents but not hot water soaking, not alkali resistant.PET is currently the most popular new environmentally friendly packaging material in the world, and is widely used in food-grade packaging bags.


3.PE

PE, namely polyethylene, is a thermoplastic resin obtained by polymerization of ethylene. Polyethylene is odorless, non-toxic, feels like wax, has excellent low temperature resistance, good chemical stability, can withstand most acid and alkali erosion, and has excellent electrical insulation. It is the most consumed plastic packaging material and is widely used in transparent plastic bags.


4.PP

PP, namely polypropylene, is a polymer made of propylene through addition polymerization. The raw material is in a semi-crystalline state, transparent in appearance and light in texture. It is a colorless and translucent thermoplastic lightweight general-purpose plastic with chemical resistance, heat resistance, electrical insulation, high-strength mechanical properties and good high wear-resistant processing performance.


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