Polyvinyl chloride film suitable for coating of hot melt pressure sensitive adhesive and preparation method of polyvinyl chloride film

Abstract

The invention provides a polyvinyl chloride film suitable for coating of a hot melt pressure sensitive adhesive and a preparation method of the polyvinyl chloride film. The polyvinyl chloride film suitable for coating of the hot melt pressure sensitive adhesive is mainly prepared from the following components in specific parts by mass of polyvinyl chloride resin, a polymeric plasticizer, a stabilizing agent and a filler. The polyvinyl chloride film suitable for coating of the hot melt pressure sensitive adhesive has excellent high-temperature-resistance, and is low in heat contraction percentage, and the thickness deviation of the polyvinyl chloride film can be controlled to 5 micrometers or below, through two thickness control units, the width of the polyvinyl chloride film can be made to be 2.5 meters or above. The preparation method of the polyvinyl chloride film suitable for coating of the hot melt pressure sensitive adhesive, disclosed by the invention, is simple in technology, high in production efficiency and suitable for mass production.

Description

technical field [0001] The invention relates to the technical field of polyvinyl chloride films, in particular to a polyvinyl chloride film suitable for hot-melt pressure-sensitive adhesive coating and a preparation method thereof. Background technique [0002] The composition of polyvinyl chloride film includes polyvinyl chloride resin, plasticizer, stabilizer, filler, and colorant. It can be made by high-temperature calendering or high-temperature casting. Excellent tensile strength and ductility, etc., can be used as a base material for the preparation of PVC tapes, labels, etc., widely used in packaging and industrial insulation protection, especially for electrical appliances for wrapping and bundling cable bundles Adhesive tape. [0003] Chinese patent application number 201610073413.1 is a manufacturing method of a new type of high temperature resistant polyvinyl chloride tape. This patent describes a manufacturing method of high temperature resistant polyvinyl chlor...

AI Technical Summary

Problems solved by technology

Since the hot-melt pressure-sensitive adhesive is coated on the surface of the PVC film after being heated and melted at 120-160 degrees, the high temperature resistance of the PVC film directly affects the coating effect, and the ordinary PVC film has poor temperature resistance , Defects such as shrinkage and holes are prone to appear after coating the hot-melt pressure-sensitive adhesive, and due to the migration of phthalate plasticizers, the cohesion of the adhesive is reduced, and problems such as overflow and convex volume occur

Traditional polyvinyl chloride film is made by high-temperature calendering process, and is calendered by three-roll or four-roll calendering equipment. The thickness control accuracy is about 10 microns, and the polyvinyl chloride film with a thickness deviation of about 10 microns is suitable for solvent-based or Coating of emulsion adhesives, but for the coating of hot-melt pressure-sensitive adhesives, no matter whether slot extrusion, roll-rod or film coating is used, the hot-melt pressure-sensitive adhesives will have poor fluidity, resulting in hot melt Bubbles are doped between the pressure-sensitive adhesive and the polyvinyl chloride film, and the adhesive thickness deviation is large, resulting in curling and bubbles

Traditional PVC calendering equipment is heated by heat conduction oil. After the heat conduction oil passes through the calender roll, the temperature difference between the oil inlet end and the oil outlet end can reach 3-5 degrees, resulting in a wedge-shaped distribution of thickness on both sides of the film. In order to minimize the impact caused by the temperature difference, the general The width of the PVC film made by calendering equipment is less than 1.5 meters, which greatly reduces the production efficiency

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