What are the outstanding characteristics of POF heat shrinkable film

What are the outstanding characteristics of POF heat shrinkable film? POF heat shrinkable film meets the packaging of various products in the shrink film industry, which is very popular with the public. This quality has won the honorary title of high-end products. According to market research and analysis, POF heat shrinkable film is becoming more and more international. It is used with advanced technology, applied in life, and can be used in many technologies such as food preservation, so that vegetables and fruits can be stored for a long time. Spoiled. POF heat shrinkable film has the characteristics of transparency, sealing, moisture resistance, good shrinkage and high tear resistance. szzxbz.cn is a packaging method widely used in product packaging, but due to the different shapes and use environments of the packaged items Therefore, it is necessary to adjust the production process of POF heat shrinkable film to obtain products with different shrinkage rates to meet the requirements of the packaged items. Shrink film is the use of the film in a high elastic state to stretch the energy in the longitudinal or transverse direction, and the energy is stored in the film, and the morphological memory effect of the thermoplastic before the bidirectional or unidirectional stretching is used. The function of the form to achieve the packaging purpose, the heat shrinkable film is prepared by the memory effect blow molding method of the polymer, so the POF heat shrinkable film is prepared through the raw material formula, the mold expansion ratio, the stretch ratio of the blown film machine, and the extrusion Factors such as temperature and bubble cooling time are important indicators for the shrinkage performance and transparency of the POF heat shrinkable film. Excellent characteristics of POF heat shrinkable film 1. High shrinkage The shrinkage rate of ordinary POF shrink film is generally about 55%, but the shrinkage rate of pe shrink film in the boiling water bath can reach more than 75%, whether it is thin tube body, cube, Cylinders and even bottles with very different diameters can be tightly wrapped. 2. High transparency, no crystal points and bidirectional stretching, the cast POF heat shrinkable film has extremely high transparency and gloss without crystal points. The colors and patterns printed on it can be perfectly presented to consumers, and the quality of your products and shelf share can be comprehensively improved. 3. Environmental protection and non-toxic because it does not contain cadmium (Cd), lead (Pb), mercury (Hg), chromium (Cr), polybrominated biphenyls (PBBS), polychlorinated terphenyls (PCT) and polychlorinated naphthalenes (PCN), etc. The first-level environmental management prohibited substances (including the restricted substances required by the EU ROHS) can fully meet your own and even foreign customer requirements for strict environmental management substance control. It is your best choice for packaging beverages, food, cosmetics and other products! POF is actually a vinyl polymer material, and its material is an amorphous material. In actual use, POF materials often add stabilizers, lubricants, auxiliary processing agents, colorants, impact resistance agents and other additives. With Non-flammability, high strength, weather resistance and excellent geometric stability. POF has strong resistance to oxidants, reducing agents and strong acids. However, it can be corroded by concentrated oxidizing acids such as concentrated sulfuric acid and concentrated nitric acid And it is not suitable for contact with aromatic hydrocarbons and chlorinated hydrocarbons. The produced hard POF heat shrinkable film is hard and brittle, and cannot be folded and wound. When the plasticizer is used for plasticization, the heat shrinkage temperature will decrease with the increase of the plasticizer content. For example, when using suspension type 3 POF resin powder and adding 30-50 PHR DOP plasticizer, the temperature can be around 70℃ Biaxially stretched at a temperature of 40°C, its products can shrink at about 40°C and cannot be stored in hot weather. Moreover, with the increase of the plasticizer content, the volume resistivity of the heat shrinkable sleeve for wire and cable decreases. Therefore, when we produce POF heat shrinkable sleeve for wire and cable joints, we still use type 6 or type 7 resin that is easier to process. In order to improve the insulation, a combination of three salt and two salt heat stabilizer is used and the film thickness is appropriately increased to ensure insulation. Related knowledge: POF heat shrinkable film