Tel: +86 188 2689 9458
source:other news release time:2022-11-22 Hits:
Polyethylene film (PE for short) is a thermoplastic polymer polymerized from ethylene. It has excellent mechanical strength, dielectric property and moisture resistance, and can maintain flexibility and chemical stability at low temperatures. The polyethylene film is colorless, tasteless, odorless, non-toxic and translucent. It does not react with moisture, grease, compounds, etc. It is insoluble in most solvents at room temperature and can withstand a low temperature of - 70 degrees. Good fusion, good permeability to oxygen and carbon dioxide, poor permeability to water vapor.
PE film can generally be divided into:
The density of low density polyethylene (LDPE) is about 0.92g/cm2; The transparency and heat sealing of LDPE film are good, which can prevent water and moisture; However, the tensile strength is low, the tensile elongation is large, and it is easy to wrinkle.
The density of medium density polyethylene (MDPE) is about 0.93 ~ 0.94g/cm2; The properties are between high-density and low-density polyethylene.
The density of high density polyethylene (HDPE) is 0.94-0.965g/cm2; The heat resistance and mechanical strength of high-density pe film are better than those of low-density pe film, and the tensile elongation is small. the film thickness is generally above 0.03 mm, but the transparency is poor.
Generally speaking, with the increase of density, the mechanical properties and barrier properties will be improved accordingly, and the heat resistance and health will be good. Polyethylene with the same density has different properties due to different film forming processes. This is because the salivation method can cool quickly, with low crystallinity, high transparency and low turbidity, but the molecular arrangement tends to be irregular, so the barrier is small, that is, the transmissivity is large, the elongation is low, and the tear resistance is poor.
Untreated pe film is difficult to print. This is because polyethylene is non-polar, chemically stable, insoluble in most solvents, has weak adsorption on ink, and is not firm after the printing is dried. Therefore, it is necessary to make printability treatment on pe film before or during printing.
Read recommendations:
125g 250g 500g 1kg Aluminum Foil Flat Bottom Coffee Bean Bags With Valve
zip lock bag for coffee company
How to choose aluminum foil vacuum packaging and transparent vacuum packaging can make customers mor
Introduction to materials used in various express delivery bags and bags
Popular recommendation
Laminated Aluminum Foil Zip Lock Bag Stand Up Pouch /Matt White Foil Pouch /Zip Lock Coffee Bag
BIB Bag-in-box dispenser with butterfly valve vitop for drinking water wine juice
Smell Proof Stand Up Flat Bottom Pouch Coffee Bag /Coffee Beans Bag With Air Release Valve And Reusa
smart spout pouch maker
aluminium spout pouch Factory
eco friendly spout pouches maker
spout pouch black distributors
mulberry mini pouch with handle price
spout pouch machine wholesale
refillable spout pouches wholesale
How to correctly choose plastic bags for food?
Requirements for fertilizer packaging bags.
Creative design of coffee bag
The use of vacuum bag and the method of controlling its thickness
Is it normal for frozen food packaging bags to bulge?
Classification of express packaging bags
What are the advantages of liquid chemical packaging bags in transportation?
Top-line packaging exhibition
The printing principle of composite bags!beverage bag manufacturers
Why are water packaging bags not suitable for long-term storage?liquid spout bag
Based on bag -type packaging bags.flexible film packaging Production
What is the reason for the broken eight side sealed food packaging bag?tea pouch packing machine Man
Barley packaging bag.biodegradable clear mailing bags
What are the special properties of aluminum foil bags explained by the manufacturer of aluminum foil
What are the factors that affect the quality of sterile bags
Vacuum packaging bag can inhibit bacteria
Development of Food Vacuum Packaging Bag Manufacturers
How to separate aluminum materials from packaging bags?
Why choose plastic vacuum bag for food packaging?
vanishing coff packaging bag.Production process of non-woven packaging bags