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A kind of pvc composite material

A talcum powder and blending technology, applied in the field of wood-plastic product topcoat production, can solve the problems of reduced product surface glossiness, insufficient product surface hardness, hidden danger of product personal safety, etc. The effect of aging performance, UV resistance and anti-aging performance improvement

Active Publication Date: 2019-02-01
GUANGZHOU HENGDE ENVIRONMENTAL PROTECTION MATERIAL
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0002] At present, titanium dioxide with excellent weather resistance and UV resistance is added to the wood-plastic products on the market, but the untreated titanium dioxide has poor UV resistance, and it is distributed inside the wood-plastic product, which further reduces its performance. Good anti-ultraviolet effect
[0003] In addition, the wood-plastic products on the market still have the following shortcomings: the surface hardness of the product is not enough, resulting in poor impact resistance of the product; the surface is not smooth enough, which not only reduces the surface finish of the product but also affects the appearance
[0004] In addition, harmful substances such as formaldehyde will be produced during the processing of ecological wood currently on the market, resulting in personal safety hazards in the produced products

Method used

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  • A kind of pvc composite material
  • A kind of pvc composite material
  • A kind of pvc composite material

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0035] The preparation of wood-plastic products by the two-step extrusion method mainly includes two technological processes: the mixing and granulation process and the co-extrusion molding process.

[0036] Mixing and granulation process: first mix wood powder and calcium powder (if necessary, treat with surface modifier to improve its poor dispersion effect in molten thermoplastics, often exist in the form of a certain aggregation state, melt flow poor performance, difficulty in extrusion molding, etc.), then pre-dry the above-mentioned wood powder and calcium powder through a constant temperature drying oven, and mix them with PVC, flame retardant, internal lubricant and external lubricant in a high-speed mixer for 2 hours, and cool After reaching a certain temperature, add foaming agent to it and carry out cold mixing, until the mixture is evenly mixed and then granulated by a twin-screw extruder to obtain wood-plastic masterbatch.

[0037] Co-extrusion molding process: th...

Embodiment 2

[0045] Example 2: The preparation method is the same as in Example 1, except that talcum powder, TiCl 4 And NaOH, the molar ratio of cerium nitrate is 1:100:400:1.

Embodiment 3

[0046]Example 3: The preparation method is the same as in Example 1, except that talcum powder, TiCl 4 And NaOH, the molar ratio of cerium nitrate is 1:100:400:0.5.

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Abstract

The invention belongs to the technical field of production of wood-plastic products and particularly discloses a PVC compound material which comprises the following components in percentage by weight: 45-55% of PVC, 8-20% of wood powder, 0-5% of straw powder, 5-15% of calcium powder, 0.05-1.5% of foaming agent, 0.1-2% of modified titanium dioxide and 0.45-2% of toner, wherein the modified titanium dioxide is prepared by coating the titanium dioxide with talc powder and adding cerous nitrate for secondary coating and then compounding. In the invention, by improving titanium dioxide and combining a wood-plastic product prepared by two steps of mixing granulation and co-extrusion moulding, the defect that the wood-plastic product easily fades outdoors is improved, the anti-ultraviolet and anti-aging properties are remarkably enhanced, the powdering and cracking of the product are effectively prevented, and the protection time of the wood-plastic product is prolonged.

Description

technical field [0001] The invention belongs to the technical field of wood-plastic product topcoat production, and more specifically relates to a PVC composite material. Background technique [0002] At present, titanium dioxide with excellent weather resistance and UV resistance is added to the wood-plastic products on the market, but the untreated titanium dioxide has poor UV resistance, and it is distributed inside the wood-plastic product, which further reduces its performance. Good anti-ultraviolet effect. [0003] In addition, the wood-plastic products on the market still have the following shortcomings: the surface hardness of the product is not enough, resulting in poor impact resistance of the product; the surface is not smooth enough, which not only reduces the surface finish of the product but also affects the appearance. [0004] In addition, harmful substances such as formaldehyde will be produced during the processing of ecological wood currently on the marke...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C08L27/06C08L97/02C08K13/06C08K9/02C08K3/22C08K3/34C08J9/04
CPCC08J9/04C08J2327/06C08J2497/02C08L27/06C08L2201/08C08L2203/14C08L2205/025C08L2205/03C08L2205/16C08L97/02C08K13/06C08K9/02C08K2003/2241C08K3/34C08K2003/2213
Inventor 不公告发明人
Owner GUANGZHOU HENGDE ENVIRONMENTAL PROTECTION MATERIAL
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