application

Commonly known as POLYVINYL CHLORIDE FILM, it is made of PVC resin and other modifiers by calendering process or blow molding process.  The general thickness is 0.08~ 0.2mm, greater than 0.25mm called PVC sheet.  PVC resin added plasticizer, stabilizer, lubricant and other functional processing AIDS, calendering film.

This kind of shed film heat preservation, light transmittance is good, soft and easy to shape, suitable for greenhouse, greenhouse and small shed outer covering material.

Disadvantages are: low film proportion, high cost;  Poor weather resistance, hard and brittle at low temperature, easy to soften and loose at high temperature;  After the precipitation of additives, the film surface vacuuming, affecting light transmission;  Residual film is not degradable and combustion treatment.

PVC Film can be roughly divided into two categories, one is Plasticized PVC Film, also known as soft PVC Film (Plasticized PVC Film), the other is not Plasticized PVC Film, also known as hard PVC Film (Unplasticized PVC Film) Among them, rigid PVC accounts for about 2/3 of the market, and flexible  PVC accounts for 1/3 .

soft PVC is generally used in the floor, ceiling and leather surface, but because soft PVC contains softener (this is also the difference between soft PVC and hard PVC), easy to become brittle, not easy to save, so its use is limited Hard PVC contains no softening agent, so the flexibility, easy molding, not brittle, non-toxic pollution-free, saving time is long, so the development and application of great value of PVC film is the essence of a vacuum blister film, used for all kinds of panel surface layer of packaging, so also known as decorative film Attach film, used in building materials packaging medicine, and many other industries The building materials industry accounted for the largest proportion, 60%, followed by the packaging industry, there are a number of other small applications of the industry according to the film forming raw materials classification: polyethylene film, polypropylene film, PVC film and polyester film According to the film use classification: agricultural film (here according to the specific use of agricultural film, can be divided into mulching film and greenhouse film); Packaging film (packaging film according to their specific purposes, and can be divided into food packaging film and all kinds of industrial products with packaging film, etc.) and is used in the special environment Breathable film with special USES, water soluble film and has the performance of piezoelectric thin film and so on According to the forming methods of the film classification: extrusion plasticizing Then blow molding of thin film, called the blown film; After extrusion plasticizing, and then the molten material from the mold mouth flow extension molding film, called flow extension film; A film made of plasticized material rolled by several rollers on a calender is called calendered film.