Focus on water soluble film application 

What are the commonly used coating materials-film suppliers

by:POLYVA     2021-10-31
There are many kinds of plastic films. Plastic films usually used for laminating mainly include polyethylene film, polypropylene film, polyester film and new biaxially oriented polypropylene film. (1) Polyethylene film Polyethylene is abbreviated as PE. Polyvinyl films are usually produced by extrusion (forming) or calendering methods. PE film is colorless, odorless, transparent and non-toxic. Water and chemicals will not affect it, and it is insoluble in most solvents at room temperature. Polyethylene is an inert material that is difficult to bond, so corona and other surface treatments must be carried out before coating. PE film can be divided into low-density polyethylene, medium-density polyethylene and high-density polyethylene according to its density. (2) Polypropylene film Polypropylene is abbreviated as PP. Polypropylene film can be divided into blown film (IPP), non-stretched T-head flat film (CPP) and biaxially stretched film according to the production method, performance and use. (BOPP). Among them, BOPP film has excellent mechanical strength, double folding strength, toughness, air tightness, moisture barrier, cold resistance, heat resistance and transparency due to the orientation of the stretched molecules, and it is non-toxic and tasteless. It is the most widely used film. Film material. As BOPP film is a non-polar material, it must be corona treated before use to meet the required surface tension requirements. The longer the storage time of BOPP film, the worse the corona treatment effect and the worse the adhesion fastness. If the time is too long, the corona treatment must be performed again. (3) Polyester film Polyester is abbreviated as PET, which is a kind of film material with good transparency and gloss. At the same time, it has the following characteristics: high mechanical strength, its tensile strength is about 5-10 times that of polyethylene, high stiffness and strong impact resistance; good heat resistance, melting point at 260℃, softening point at 230~240 ℃, the shrinkage is still small at high temperature, and it has very good dimensional stability. It does not affect its performance after heating for a long time at high temperature; it has good oil resistance, good acid resistance, not easy to dissolve, and has good acid corrosion resistance. Corrosion by organic solvents and oils, but it is easy to deteriorate when exposed to strong alkalis; it has good gas barrier properties and good odor barrier properties; good transparency, light transmittance above 90%; barrier performance to water vapor is not as good as polyethylene And polypropylene; poor protection against ultraviolet rays; easy to be charged with static electricity, static elimination treatment should be carried out before printing. The polyester film used for the film is also a biaxially oriented PET film. It is a company specializing in the production of PET film with multiple functions, such as: transparent PET film, milky white PET film, release PET film, supply of PET motor film, etc. With a wide variety of products, affordable prices, and environmental protection, we provide customers with excellent quality and service based on the service tenet of excellence in production, honesty and trustworthiness in distribution, and warm and thoughtful service, and the spirit of assisting partners to achieve their own careers. Interested parties welcome to inquire!
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