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A kind of manufacture method of pvb film

A manufacturing method and mold technology, applied in the manufacturing field, can solve problems such as PVB film difficulties

Inactive Publication Date: 2015-08-26
浙江利丰塑胶有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0004] It is very difficult to obtain PVB films with good performance parameters in the prior art

Method used

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  • A kind of manufacture method of pvb film

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Embodiment Construction

[0014] The present invention will be further described below in conjunction with the accompanying drawings and examples of implementation. Of course, the following examples should not be construed as limiting the present invention.

[0015] The method process of the embodiment of the present invention is as figure 1 shown, including:

[0016] Step 1, delivering molten raw materials to the mold; wherein the melt flow rate of the raw materials is 1.2-1.9 g / min, and the temperature of the mold is 160°C-190°C;

[0017] Step 2, when the thickness of the raw material in the mold is 0.2mm smaller than the thickness of the required finished product, stop conveying the raw material;

[0018] Step 3. Carry out natural molding under preset time, temperature, pressure and humidity.

[0019] As the preference of the above technical solution, the method also includes:

[0020] Step 2a, according to the mold model, mold temperature, and melt flow rate of raw materials, calculate the time,...

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Abstract

The invention provides a method for preparing a polyvinyl butyral (PVB) film. The method comprises the following steps of: 1, conveying molten raw materials to a mold, wherein the melt flow rate of the raw materials is 1.2 to 1.9g / min, and the temperature of the mold is 160 to 190 DEG C; 2, stopping conveying the raw materials when the thickness of the raw materials in the mold is 0.2mm less than that of the required finished product; and 3, naturally forming at preset temperature and humidity under preset pressure for preset time. By the method, the characteristic of a PVB material is fully considered, and the optimal melt flow rate and mold temperature are obtained through experiments, so that the obtained PVB film has good profile maximum height Ry, profile arithmetic average deviation Ra and profile peak height Rp. The experiments prove that the three main parameter values Ra, Rp and Ry of the PVB film prepared by the method are 4-12, 10-35 and 12-35 respectively.

Description

technical field [0001] The invention relates to the field of manufacturing technology, in particular to a method for manufacturing a PVB film. Background technique [0002] The PVB interlayer film is a translucent film, a polymer material formed by plasticizing and extruding polyvinyl butyral resin through a plasticizer. The appearance is a translucent film, without impurities, smooth surface, certain roughness and good flexibility, good adhesion to inorganic glass, transparent, heat-resistant, cold-resistant, moisture-resistant, high mechanical strength, etc. The world's best bonding material for lamination and safety glass. The pattern shape and surface roughness of the diaphragm surface of PVB film are important data of PVB diaphragm, and these two properties directly affect the use effect of the product. [0003] The three important parameters that represent the surface pattern and roughness of the PVB diaphragm are: the maximum height Ry of the profile, the average ar...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): B29C39/02B29C39/44B29L7/00
Inventor 安永锋
Owner 浙江利丰塑胶有限公司