Self-supporting food bag

When we usually buy food or clothes and other products, we often find that when we open it, there is another place to pull. This is a self-contained food package. With self-supporting food packaging bags, we can easily pull up, to ensure the quality of food. Polyethylene is a thermoplastic, lighter than water, soft, resistant to water, low temperature, tasteless according to its density, non-toxic. It can be divided into high density, medium density, low density polyethylene and linear low density polyethylene. Polypropylene, a by-product of oil refining, is non-toxic; Tasteless, high transparency, good mechanical properties, surface strength, friction resistance, chemical corrosion resistance, moisture resistance; Higher than room temperature, the impact resistance value is large, polypropylene raw material sources, low price, wide adaptability. Widely used in food industry, mainly used in the manufacture of thin film, composite film, good transparency, good surface luster, temperature 120 degrees; Can be made into packing boxes, blow into plastic bottles, add some filler can be made into some mechanical parts, etc.

Polystyrene is a colorless transparent non-malleable thermoplastic; Non-toxic, tasteless, odorless, good coloring, moisture permeability greater than polyethylene, low hygroscopicity, stable size, good luster; Good processing performance, low cost; The mechanical properties increased with the increase of molecular weight. Low temperature resistance -40℃ low temperature; Indoor aging resistance is good; Alcohol organic solvent mineral oil has good acid resistance and good alkaline ability. It's a great material for shrink wrap.