A kind of production process of pvc calendering film

Abstract

The invention relates to a production process of a PVC (polyvinyl chloride) calendered film. The production process comprises the following steps that: (1) firstly, the calendered film from a bottom roller of a calendering almost synchronously passes through a first group of guide leaving rollers with a normal temperature water channel and a second group of guide leaving rollers with a hot oil channel and a third group of guide leaving rollers; (2) then, the calendered film passes through a knurling roller with a hot water channel, and the knurling roller and a rubber roller work together to knurl the calendered film; (3) multiple groups of cooling rollers are used for cooling and shaping the calendered film; and (4) finally, carrying out side shearing and rolling. Compared with the prior art, the production process provided by the invention has the advantages that the temperature difference between the bottom roller of the calendered and the guide leaving rollers and among the guide leaving rollers through the normal temperature water channel arranged in the first group of guide leaving rollers, the calendered film passes through the guide leaving rollers almost synchronously, the condition that molten material is stretched so as to generate water ripples is effectively prevented, and people can not see the water ripples of the calendered film in a light transmitting condition.

Description

Technical field [0001] The invention relates to a calendered film of lampshade raw materials, in particular to a production process of a PVC calendered film. Background technique [0002] The existing PVC calendered film used for lampshades, the main process flow is as follows: after the calendered film comes out of the calender, it is further plasticized and stabilized by multiple sets of take-off rollers equipped with hot oil channels, and the rotation speed of the multiple sets of take-off rollers There is a big difference. It enters the embossing roll with chilled water channel for embossing, then cools and transitions, enters the trimming and center winding. The PVC calendered film produced by the above process is transparent and the water ripples are serious. Use this material The manufactured lampshade affects the appearance and needs to be covered with a non-woven fabric, which indirectly increases the manufacturing cost of the lampshade. Summary of the invention [0003]...

AI Technical Summary

Problems solved by technology

[0002] The existing PVC calendered film used as lampshade, its technological process is mainly as follows: After the calendered film comes out of the calender, it is further plasticized and stabilized by multiple sets of lead-off rollers equipped with hot oil channels, and the rotation speed of the multiple sets of lead-off rollers The difference is large, enter the embossing roller with frozen water channel for embossing forming, then cool transition, enter edge trimming and center coiling, the PVC calendered film produced by the above process has serious water ripples in light transmission, with this material The manufactured lampshade affects the appearance, and it needs to be covered with non-woven fabric, which indirectly increases the manufacturing cost of the lampshade