Method for covering substrate having concave-convex surface by using PVC film and application

Abstract

The invention provides a method for covering a substrate having a concave-convex surface by using a PVC film and an applcation. The method comprises the following steps: S1: selecting a PVC film witha suitable specification, wherein the step S1 comprises the following steps: step 1, respectively cutting out a plurality of samples on each PVC film, and testing the elastic extension values eta<transverse>, eta<deviation> and eta<longitudinal> of each sample of each PVC film in three directions of transverse, 45-degree off-axis and longitudinal directions; step 2, calculating the surface area Sof the covered substrate having the concavo-convex surface, at the same time, measuring the projected area S0 of the covered substrate having the concave-convex surface, and calculating the elastic extension limit value eta<extremity> of a film satisfying the production requirement according to a formula shown in the specification; and step 3, selecting a PVC film of which the elastic extension values eta<transverse>, eta<deviation> and eta<longitudinal> are all greater than the eta<extremity> as a suitable material for the covering the surface of the substrate; and S2: determining the temperature and pressure of the covering film, and laying the PVC film selected from the step S1 on the surface of the substrate having the concave-convex surface under the temperature and pressure conditions. The PVC film covering method of the invention can eliminate the quality problems such as floatation of the PVC film after the PVC film is laid on the substrate having the concave-convex surface, distortion and whitening of a pattern at the convex surface top end, sinking, surplus, wrinkling at the concave surface, etc.

Description

technical field [0001] The invention relates to a PVC film covering technology, in particular to a method for covering a base material with a concave-convex surface by using a PVC film. Background technique [0002] On furniture products, in order to make the surface of the furniture look shiny and patterned, PVC film will be covered on the surface of the product. This process is called PVC film covering. At present, this technology basically heats and softens the flat PVC film through positive and negative pressure machines or vacuum blister machines, and then uses the vacuum suction generated by the vacuum pump to vacuum the softened PVC film on the surface of uneven substrates such as furniture. , formed after cooling. [0003] However, since the surface of the concave-convex substrate is not flat, but has some three-dimensional shapes or patterns, some quality problems of the film often appear when PVC is laminated. For the door panel, when the door panel surface is co...

AI Technical Summary

Problems solved by technology

[0005] The technical problem to be solved by the present invention is to provide a method for covering the base material with a concave-convex surface by using a PVC film, and using the method of the present invention to solve the problem of surface coating of a concave-convex base material with a three-dimensional pattern or shape in the traditional PVC film covering process. Floating problems, pattern distortion, sinking and shrinkage problems that are easy to occur when covering the surface

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