PVC calendering film is a kind of closed cell foam coated plastic made of polyvinyl chloride resin as the base material, adding foaming agent, stabilizer and other auxiliary materials, after kneading, ball milling, molding and foaming. In addition to the soft and hard properties of the technology products, there are three kinds of soft quality, bovine broken quality and quality.
PVC calendering film is made by the calendering process, calendering is the heat of PVC plastic through a pair or more pairs of horizontal roller rotation gap, so that the material under extrusion, extension, and become a thin product with a certain thickness, width and smooth surface process. Polyvinyl chloride rolling film plays an important role in plastic shed film. In addition, it is widely used in salting sheet, industrial packaging, electrical insulation, inflatable film products, light box advertising, engineering waterproof, packaging of daily necessities and so on.
The reason why PVC calendering film is so widely used is that it has the following characteristics.
High tensile strength
The tensile strength of PVC calendering film is up to 29MPa. In the past sandstorms in northwest China, PE film and EVA film were damaged, but PVC calendered film was intact.
Good thermal insulation performance
As a covering material for agricultural greenhouses, glass has the best thermal insulation performance, followed by PVC calenning film (with strong infrared absorption capacity), and then PE film. In addition, at night PVC calendered film insulation performance and glass is not different, which is very beneficial to promote the growth of crops.
Good transparency
PVC calendring film in the forming after the extrusion of mirror roller, the surface finish is very high, the phenomenon of water condensation is less, so the light transmittance is higher, which is very beneficial to the photosynthesis of crops.
The thickness of homogeneous
Because the roll of PVC calendered film is in the shape of a drum, the middle roll is crossed, the lower roll has pre-strain, and the roll surface is finely ground, so the thickness accuracy is higher.
Good bonding performance
According to the use needs, PVC calendering film can be high-frequency welding, hot bonding and adhesive bonding methods, easy to use.
In addition, according to the different uses of PVC calendering film, can be met by changing the production formula and process conditions.
Post time: Aug-11-2022