Mechanical properties: After a two-way stretch film, its tensile strength, elastic modulus can improve several times, but the impact strength, for PP, PVC, PET stretch film, with no stretch film has obvious difference, especially at low temperature, the impact strength is not reduced, namely the cold resistant performance is good, and at high temperatures, its performance is not poor, This allows bidirectional stretching films to be used over a wide range of temperatures.

Electrical properties: breakdown voltage, volume resistivity and other electrical properties are improved in bidirectionally stretched films. Sometimes, problems with static electricity occur.

Thermal properties: Thermal shrinkage properties are characteristics of bidirectional stretch films, which can be used for shrink packaging. In order to make the film shrink at low temperature, it is particularly advantageous to use the tube membrane method with simultaneous bidirectional stretching. This is because the microstructure can be increased under bidirectional stretching, and the membrane bubble is directly cooled and in the stretched state.

Air tightness: After bidirectional stretching, the membrane produced by crystalline polymer reduces the permeability of water vapor, oxygen or other gases by 1/3 ~ 1/2, which is particularly important in the food packaging industry.

Optical PROPERTIES: AFTER bidirectional STRETCHING, THE transparency AND gloss OF THE film are improved, especially because the spherulite structure will not be formed, and the refractive index of the film is increased, so the luster and transparency of the film are not reduced due to friction loss.

Bidirectional stretch film technology advantages: bidirectional stretch polyester film (BOPET) has excellent comprehensive performance, its high mechanical strength, good optical properties, wide use temperature, excellent barrier, oil resistance, corrosion resistance and so on, so its application field is very wide.

Advantages of BOPET double pull production line:

I. Quality assurance:

The company specializes in the production of plastic extrusion line for more than 30 years, has rich industry experience and technical advantages, is a well-known brand in the field of plastic extrusion; At the same time, the double-pull BOPET production line independently developed by the company has been formally put into production in the new factory, and the general intention customers are welcome to visit at any time.

Second, the production cycle

Affected by the epidemic situation abroad, the order scheduling cycle of internationally renowned double-pull manufacturers is relatively long. Our company has manufacturing experience and can schedule production at full load, so the production cycle is relatively short.

Third, price advantage

Compared with the imported production line, our company's production line under the premise of quality assurance, the price will be more cost-effective than the import.