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Double-layer PVC (Poly Vinyl Chloride) composite material and preparation method thereof

A composite material and double-layer technology, applied in the direction of chemical instruments and methods, layered products, synthetic resin layered products, etc., can solve the problems of non-renewable treatment, no smoothness, poor scratch resistance, etc., and achieve low cost, Low-cost, easy-to-form effects

Inactive Publication Date: 2012-07-25
江苏伊特复合新材料有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] The disadvantage of single-layer PVC material is that its surface is rough and has no smoothness. If this problem is to be solved, the surface must be polished and sprayed. However, this process is not environmentally friendly, and it is harmful to the human body. It has poor corrosion resistance and scratch resistance. The performance is also poor and cannot be recycled

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0018] The double-layer PVC composite material in this embodiment includes: an upper layer and a bottom layer co-extruded up and down.

[0019] The components included in the upper layer and their mass percentages are: 15% PET resin, plasticizer (one of 3% dibutyl phthalate, 3% epoxy soybean oil), 5% aluminum silver powder, stabilizer (UV- 531 ultraviolet absorber 1%, antioxidant DLTP 1%), lubricant (stearic acid 0.5%, paraffin white oil 0.5%), polyvinyl chloride resin balance.

[0020] The bottom layer includes components and their mass percentages are: plasticizer (one of 3% dibutyl phthalate, 3% epoxy soybean oil), stabilizer (calcium stearate 0.5%, UV-531 ultraviolet absorber agent 0.5%, antioxidant DLTP 0.5% one), lubricant (stearic acid 0.5%, liquid paraffin white oil 0.5%), filler (including: calcium carbonate 22%, talcum powder 4%, carbon fiber 4%, flame retardant 1%), and the balance of polyvinyl chloride resin.

Embodiment 2

[0022] The preparation method of the double-layer PVC composite material of above-mentioned embodiment 1, comprises the steps:

[0023] After mixing the prepared raw materials constituting the upper layer and the bottom layer with a high-speed mixer, they are respectively granulated and shaped by a granulator to obtain plastic granules for the upper layer and the bottom layer;

[0024] The dried upper and bottom plastic granules are respectively input into the A and B barrels of the twin-screw extruder through a vacuum machine, and the temperature of the A and B barrels is set to 110-130°C, and the twin-screw extruder The hosts A and B are set at 200-240°C, and then the hosts A and B are turned on. The twin-screws rotate continuously in the barrels of A and B to accelerate the melting and plasticization of the materials, and then the twin-screws apply pressure to the plasticized melt. , so that the materials in the A and B barrels are extruded into the co-extrusion die, and th...

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Abstract

The invention provides a double-layer PVC (Poly Vinyl Chloride) composite material and a preparation method thereof. The composite material comprises an upper layer and a bottom layer which are formed by up-down co-extrusion. The upper layer comprises the following components in mass percent of 13-17% of PET (Poly Ethylene Terephthalate) resin, 2-4% of plasticizer, 4.5-5.5% of aluminum silver powder, 0.9-1.1% of stabilizing agent, 0.3-1.5% of lubricating agent and residual amount of polyvinyl chloride resin; the lower layer comprises the following components in mass percent of 2-4% of the plasticizer, 0.3-1% of the stabilizing agent, 25-35% of filling agent and residual amount of the polyvinyl chloride resin. The upper layer of the double-layer PVC composite material provided by the invention comprises the aluminum silver powder, and the aluminum silver powder is applicable to filling pits on the surface of the upper layer, so that the surface of the upper layer has high fineness and brightness to satisfy the decorating effect on the surface of the household appliances. The bottom layer is a hard PVC layer and has preferable mechanical properties and product stability, so that the rigid requirements of the entire product can be met.

Description

technical field [0001] The invention relates to the technical field of PVC composite materials, in particular to a double-layer PVC composite material and a preparation method thereof. Background technique [0002] Generally, PVC material is composed of PVC resin, stabilizer, lubricant, modifier and other components. After the materials are mixed evenly, they are added to the screw groove quantitatively, and are conveyed forward by the power of the screw. The heating effect of the barrel and the shearing effect of the screw make it The material is plasticized and melted, and the cross-sectional area of ​​the mold cavity gradually decreases from the screw groove to the mouth, so a certain back pressure is formed under the action of the screw power to form the PVC material. [0003] The defect of single-layer PVC material is that its surface is rough and has no smoothness. If this problem is to be solved, the surface must be polished and sprayed. However, this process is not e...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C08L27/06C08L67/02C08K13/04C08K3/08C08K5/12C08K5/1515C08K3/26C08K3/34C08K7/06B32B27/08B32B27/18B32B27/30B32B27/36B29C47/00B29B9/00B29B7/00
Inventor 张佳平
Owner 江苏伊特复合新材料有限公司
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