POF heat shrinkable film is a replacement product of traditional PVC heat shrinkable film

POF heat shrinkable film has the characteristics of high tear resistance, uniform heat shrinkage and suitable for automatic high-speed packaging. It is a replacement product of traditional PVC heat shrinkable film. Soft films include polyvinyl chloride (PVC) film and polyethylene (PE) film. Film, ethylene-vinyl acetate (EVA) agricultural film. (1). Polyvinyl chloride (PVC) greenhouse film: It is made into a film by adding plasticizers, stabilizers, lubricants, functional additives and processing aids to the polyvinyl chloride resin. It is characterized by good light transmission, far infrared ray blocking, strong heat preservation, soft and easy to shape, good adhesion, and good weather resistance. In Japan, about 80% of the greenhouse cultivation is covered with PVC film. The disadvantage is that the density is large (1.3g/cm3), the coverage area of u200bu200ba certain weight of the shed film is 1/3 less than that of the polyethylene film (PE), and the cost is high. After the agent precipitates, the film surface is easy to stick to dust, which affects the light transmission, and the residual film cannot be burned because it will produce toxic chlorine. Heat shrinkable film is a kind of packaging used for various products. It plays an important role in stabilizing, covering and protecting the product. It has an important effect on the sales and transportation of the product. The shrink film has strong durability and shrinkage. , In the process of shrink packaging, it adheres to the appearance of the product, which is beautiful and convenient. There are many categories of heat shrinkable film, including POF heat shrinkable film, PVC shrinkable film, PE shrinkable film, etc. Different types of shrinkable film have different characteristics, which are reflected in the following three points: 1. PE shrinkable film: has excellent Flexibility, tear resistance, large shrinkage, etc., suitable for alcohol, mineral water, various beverages, etc. 2. PVC film. It has the characteristics of good transparency and good gloss. 3. POF heat shrinkable film is a packaging film with high surface gloss, good flexibility, low carbon and environmental protection, and wide applicability. With the application of POF heat shrinkable film technology, POF heat shrinks Film gradually replaced other films and became a mainstream packaging film. (2). Polyethylene (PE) shed film: Polyethylene shed film is a polyethylene resin that is extruded and blown into a film. Light texture, soft, easy to shape, good light permeability, non-toxic, suitable for various greenhouse films, mulching film, is currently the main agricultural film varieties in my country. Its disadvantages are: poor weather resistance, poor heat preservation, and difficult to bond. If the production of greenhouse film must be modified with additives such as anti-aging agent, non-drip agent, thermal insulation agent, etc., it can meet the requirements of production. At present, the main raw materials of PE are high-pressure polyethylene (LDPE) and linear low-density polyethylene (L-LDPE). (3). Ethylene-vinyl acetate polymer (EVA) agricultural film: EVA's infrared barrier is between PVC and PE. EVA has weak polarity and can be mixed with a variety of weathering agents, heat preservation agents, and anti-fogging agents to blow film, with good compatibility and strong tolerance. Different materials have different characteristics: EVA has particularly excellent low temperature resistance; secondly, PE, PVC agricultural film containing 30% plasticizer hardens at 0°C, and has extremely poor tensile and impact resistance. EVA and PVC agricultural film are not suitable for high temperature and hot summer application. The initial light transmittance of both PVC and PE can reach 90%. With the passage of time, PVC will affect the light transmittance and make the light transmittance drop quickly. The light transmittance of PE decreases slowly. Click for more relevant knowledge points: