Guangdong Huaping Hygiene Material Industrial Co.,Ltd. main products include protective film,PE breathable film,PE perforated film,Multicolor printed film,Nonwoven Laminated film,Anti-counterfeiting Holographic film etc .
Polyethylene is a crystalline material that is easy to crystallize. If it is not cooled rapidly, the light transmittance and elongation at break will inevitably be reduced. The cooling effect of blow molding is poor, the crystallinity is high, and the transparency of the film (thin and soft transparent sheet) is low.
The production of PE (polyethylene) protective film is due to severe blow molding, drawing, and molecular orientation, resulting in low elongation at break; while casting production has the characteristics of good cooling effect, low crystallinity, good transparency, and low orientation degree. , so the elongation at break is high and the shrinkage is good.
It is necessary to add an appropriate amount of anti-fog agent
On this basis, add transparent nucleating agent
Be sure to add a small amount of polyacrylate resin with good compatibility and transparency.
In order to make the PE protective film achieve higher transparency, 0.5-1% homogeneous oil (oil) can also be added during the production process. Homogenized oil is a non-toxic (poisonous) pigment powder. It can be processed together into a uniform and transparent colored substance.
The addition of a nucleating agent can also increase the number of crystallized nuclei in the PE protective film melt at the melting point, increase the crystallization speed, and refine the grains so that the crystals do not affect the transparency of the film, thereby improving the crystallinity of the PE protective film , Improve the strength of the film while increasing the transparency. According to the viscosity of PE protective film, it is mainly divided into: ultra-low viscosity protective film, low-viscosity protective film, medium-low viscosity protective film, medium-viscosity protective film, high-viscosity protective film, and ultra-high-viscosity protective film.
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