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A composite material and raw material technology, applied in the field of PVC composite material and its preparation, can solve the problems of non-recyclable treatment, poor scratch resistance, poor corrosion resistance, etc., and achieve the effects of low cost, easy molding and low cost
Active Publication Date: 2012-07-18
江苏伊特复合新材料有限公司
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Abstract
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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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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 and mass percentages included in the upper layer are: 15% PET resin, plasticizer (one of 3% dibutyl phthalate, 3% epoxy soybean oil), 5% aluminum silver powder, 1% stabilizer ( UV-531 ultraviolet absorber 1%, antioxidant DLTP 1%), lubricant (stearic acid 0.5%, paraffin white oil 0.5%), polyvinyl chloride resin balance.
[0020] Components and mass percentages thereof included in the bottom layer are: plasticizer 3% (dibutyl phthalate 3%, epoxy soybean oil 3%), stabilizer (calcium stearate 0.5%, UV-531 UV absorber 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%), 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 PVC (Poly Vinyl Chloride) composite material and a preparation method thereof. The composite material comprises an upper layer and a bottom layer which are subjected to up-and-down co-extrusion forming; the upper layer comprises the following components in percentage by mass: 15 percent of PET (polyethylene glycol terephthalate) resin, 3 percent of plasticizer, 5 percent of aluminium silver powder, 1 percent of stabilizer, 0.3 to 1.5 percent of lubricant and the balance of PVC resin; and the bottom layer comprises the following components in percentage by mass: 3 percent of plasticizer, 0.3 to 1 percent of stabilizer, 0.3 to 1 percent of lubricant, 24 to 36 percent of filler and the balance of PVC resin. The upper layer of the double-layer PVC composite material provided by the invention comprises the aluminium silver powder, and the aluminium silver powder is suitable for filling concave pits on the surface of the upper layer, so that the surface of the upper layer has high smooth finish and brightness to meet the surface decoration effect of household appliance equipment; and the bottom layer is a hard PVC layer, has good mechanical performance and product stability, and is suitable for meeting the integral rigidity requirement of the product.
Description
technical field [0001] The invention relates to the technical field of PVC composite materials, in particular to a 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 environmentall...
Claims
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Application Information
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