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Preparation of PET and PVC composite film for decorating glass

A technology for decorative glass and composite film, which is applied in the direction of film/sheet adhesives, coatings, adhesives, etc., which can solve the problems of low elongation at break, poor safety effect, and poor adhesion of PET, and achieve protection Personal and property safety, good safety performance, easy printing effect

Active Publication Date: 2012-03-28
GUANGZHOU LUSHAN NEW MATERIALS +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] In order to solve problem 1, some manufacturers tried to prepare EVA film with better yellowing resistance, but the adhesion to PVC / PP was poor; in order to solve problem 2, someone used PET as a separator to produce single-sided strengthened glass. But the operation is cumbersome; in order to prepare decorative glass with better reflective effect, some people have used printed PET as a decorative back film, which not only has high cost, but also has low elongation at break and poor safety effect.

Method used

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  • Preparation of PET and PVC composite film for decorating glass

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0018] Preparation of composite decorative film:

[0019] With a VA content of 28%, a melt index of 6.0g / 10min EVA (model: EVAFLEX260), dicumyl peroxide (DCP) 0.02 parts, glycidyl methacrylate (GMA) 1.0 parts together, The obtained mixture was extruded and granulated by a twin-screw extruder at 190° C. to prepare a viscosifying masterbatch (EVA-g-GMA).

[0020] After EVA-g-GMA is prepared, blend EVA (EVAFLEX260) and EVA-g-GMA according to 90:10 (weight ratio) and cast on the PET film coated with adhesion promoter (adhesion promoter adopts rosin); While gluing the PET film, put the PVC film from the back side of the laminating machine smoothly into the other side of the film to form a PET / EVA / PVC composite film; finally unwind the PET / EVA / PVC composite film, and Perform secondary coating on the PVC surface.

[0021] The selected EVA resin has a VA content of 20-40% and a melt index of 5-30g / 10min; more preferably a VA content of 20-30% and a melt index of 5-20g / 10min. The hi...

Embodiment 2

[0027] Except changing the EVA (model: EVAFLEX260) in Example 1 to EVA (model: EVAFLEX220), the composite decorative adhesive film and single-sided tempered glass were prepared in the same manner as in Example 1.

Embodiment 3

[0029] Except that the DCP in Example 1 was replaced with BPO (benzoyl peroxide), the composite decorative adhesive film and single-sided strengthened glass were prepared in the same manner as in Example 1.

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Abstract

The invention relates to a method for preparing PET and PVC composite film for decorative glass, which is characterized by comprising the following steps: firstly mixing EVA, initiator and GMA evenly according to a 1.0%-2.0% adding dosage, grafting the mixture in double screws at 190 DEG C; after preparing a thickening master batch EVA-g-GMA, mixing the EVA and the EVA-g-GMA according to weight ratio of 90 to 10, casting the mixture on a PET film coated with an adhesion promoter; at the same time of coating the PET film, smoothly placing a PVC film from the back side of a laminating machine to the other side of a glue film to form a PET / PVC composite film; and finally unreeling the PET / PVC composite film for secondary lamination. The EVA / PET / EVA / PVC composite film prepared by the method can change positions of PET and PVC according to requirements, make full use of advantages of the PET, such as good transparency, heat resistance and mechanical performance, low PVC price, and easy printing, and can be used as the film for single-sided decorative glass. The prepared single-sided decorative glass not only has beautiful appearance, but also has good safety performance. The composite film can also be used as the film for decoration of aluminum plates, stainless steel, stones, and the like.

Description

technical field [0001] The invention relates to the field of chemical product processing, in particular to a method for preparing a composite film of PET and PVC applied to decorative glass. Background technique [0002] The usual structure of single-sided strengthened glass is glass / adhesive film / PVC or PP, where the adhesive film is usually made of EVA film, various patterns are printed on PVC or PP, and the three are compounded by hot pressing. This method has many disadvantages. First, the usual EVA film is easy to turn yellow, which affects the appearance; second, PVC or PP has poor heat resistance. Adhesion phenomenon, resulting in waste products; 3. For occasions where the decorative film has a good reflective effect, this structure cannot be realized; 4. During preparation, the EVA film must be placed on the glass first, and then the decorative film, which is complicated to operate. [0003] In order to solve problem 1, some manufacturers tried to prepare EVA film w...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C03C23/00C08J5/12C08J7/04C08L67/02C08L27/06C09J123/08C09J7/00
Inventor 李连春唐舫成汪加胜
Owner GUANGZHOU LUSHAN NEW MATERIALS