Method for preparing polyvinyl butyral rubber sheet

A technology of polyvinyl butyral and polyvinyl butyral resin, which is applied in the field of preparing polyvinyl butyral film, and can solve the problems of high cost, troublesome ingredients and operation process, etc.

Inactive Publication Date: 2008-01-23
浙江利丰塑胶有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] 2. Use hard and elastic cross-linked PVB particles to form surface patterns and roughness (Chinese invention patent 94115319.3). This method is troublesome in ingredients and operation process, and the cost is also high

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0017] A method for preparing polyvinyl butyral film includes the following steps:

[0018] (1). Mix 950kg of polyvinyl butyral resin with 75kg of plasticizer 3GO, 1kg of antioxidant B-900, 1kg of ultraviolet absorber UV-327, and 10g of optical brightener OB to prepare plasticized polyethylene Butyral resin.

[0019] (2) The plasticized polyvinyl butyral resin prepared in step (1) is added to a single-screw extruder for melting, and melt extrusion is performed. The extruded melt is fed into the extrusion die. The temperature of the melt is 175℃. The surface temperature of the die lip is controlled to 140℃ through the lip oil cooler, the gap of the die lip is 0.81mm, and the pressure of the die is 12MPa. , Extruding polyvinyl butyral film between the two die lips of the extruding die head, the extrusion volume is 300kg / h.

[0020] The surface pattern of the extruded PVB film is random, wavy, and the roughness is 35um.

Embodiment 2

[0022] The surface temperature of the die lip is controlled to 125°C, and the other process methods are the same as in the first embodiment. The surface pattern of PVB film is random, and the roughness is 60um.

Embodiment 3

[0024] The gap of the die lip is controlled to be 0.92mm, and the other process methods are the same as the first embodiment. The surface pattern of PVB film is wavy, and the roughness is 40um.

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Abstract

A method of preparing polyethylene glycerol film, which comprises the following procedures: firstly, mix polyethylene glycerol resin and addition agent to produce plasticized polyethylene glycerol resin; secondly, add the plasticized polyethylene glycerol resin produced in the procedure (1) to an extruding machine to smelt, and proceed flux extruding; the extruded flux is delivered into a extruding plate module head, a polyethylene glycerol film is extruded between the two module lips of the extruding plate module head, the gap between the module lips is controlled between 0.65 to 0.95mm during the process, at the same time control the temperature of the surface of the module lips lower by 20 to 55 DEG C. than the flux. The method provided in the invention can conveniently realize the surface decoration design and roughness of the PVB film, which doesn't need special assistance operation, and realize the control to the decoration design and roughness of the film.

Description

(1) Technical field [0001] The invention relates to a method for preparing polyvinyl butyral film. (2) Background technology [0002] Polyvinyl butyral (PVB) film is an interlayer material for making safety glass. When making laminated safety glass, the air between the PVB film and the glass must be fully evacuated. The surface pattern and roughness of PVB film is an important index that characterizes whether it can smoothly discharge air when making laminated safety glass. [0003] In the known technical data, the methods to control the surface pattern and roughness of PVB film are: [0004] 1. Embossing roll forming. The surface and roughness of PVB film produced by this molding method are determined by the surface of the embossing roller. Because PVB also has good bonding properties to metal materials, the film squeezed out from the die is wrapped around the embossing roller and abnormalities occur during production. At the same time, the equipment investment for a pair of emb...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B29C47/16B29C47/92B29C47/12B29K29/00B29L7/00B29C48/31B29C48/30B29C48/92
CPCB29C48/08B29C48/92B29C2948/92647B29C2948/92704B29C2948/92904
Inventor 安永锋齐冬明尹学毅安传清
Owner 浙江利丰塑胶有限公司
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