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Preparation method of polyvinyl chloride (PVC) low-foaming wood plastic composite

A wood-plastic composite material and low-foaming technology, which is applied in the field of composite materials, can solve problems such as fire hazards, mildew and insects, safety hazards, etc., and achieve the effects of low production costs, improved mechanical properties, and high performance

Inactive Publication Date: 2011-08-10
SHANGHAI BESTON PLASTICS
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

It is particularly worth pointing out that the use of logs to process and make decorative materials not only brings fire hazards, but also is prone to mildew and insects, which brings safety hazards.

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0024] After mixing the raw materials in the following proportions with a high-speed mixer, they are granulated and extruded. The raw materials and their parts by weight are:

[0025] PVC resin, 100 parts;

[0026] Wood fiber, 60 parts;

[0027] Stabilizer, 5 parts;

[0028] Plasticizer, 10 parts;

[0029] modifier, 5 parts;

[0030] lubricant, 3 parts;

[0031] AC blowing agent, 0.6 parts;

[0032] Firstly, the wood fiber is dried and sieved to be below 80 mesh, and the moisture content is below 3%.

[0033] Then put the wood fiber into the high-speed mixer, the stirring speed is 1000-1800 rpm, when the temperature rises to 50-100 ℃, add PVC resin, plasticizer, foaming agent, stabilizer and modifier, and finally add lubricant , through pelletizing and extruding to obtain a composite material. The temperature setting of each section during the actual processing of the extruder is as follows: section i: 150-170°C; section ii: 160-190°C; section iii: 170-195°C; section iv...

Embodiment 2

[0035] After mixing the raw materials in the following proportions with a high-speed mixer, they are granulated and extruded. The raw materials and their parts by weight are:

[0036] PVC resin, 100 parts;

[0037] Wood fiber, 40 parts;

[0038] Calcium-zinc composite stabilizer, 4 parts;

[0039] Plasticizer, 15 parts;

[0040] modifier, 10 parts;

[0041] lubricant, 4 parts;

[0042] AC blowing agent, 1.0 part;

[0043] Coupling agent, 1 part;

[0044] Firstly, the wood fiber is dried and sieved to be below 80 mesh, and the moisture content is below 3%.

[0045] Then soak the wood fiber in NaOH solution, soak it, rinse it with deionized water to be neutral, and dry it to constant weight;

[0046] Then put the wood fiber into the high-speed mixer, the stirring speed is 1000-1800 rpm, when the temperature rises to 50-100°C, add the coupling agent and stir evenly, then add PVC resin, plasticizer, foaming agent, stabilizer Agents and modifiers, and finally add lubricants...

Embodiment 3

[0048] After mixing the raw materials in the following proportions with a high-speed mixer, they are granulated and extruded. The raw materials and their parts by weight are:

[0049] PVC resin, 100 parts;

[0050] Wood fiber, 40 parts;

[0051] Stabilizer, 4.5 parts;

[0052] Plasticizer, 5 parts;

[0053] modifier, 8 parts;

[0054] lubricant, 2 parts;

[0055] AC foaming agent, 0.2 parts;

[0056] Coupling agent, 1.5 parts;

[0057] calcium carbonate, 6 servings.

[0058] In this embodiment, the stabilizer is a calcium-zinc composite stabilizer, which contains hydrotalcite.

[0059] Firstly, the wood fiber is dried and sieved to be below 80 mesh, and the moisture content is below 3%. Then put the wood fiber into the high-speed mixer, add calcium carbonate, the stirring speed is 1000-1800 rpm, when the temperature rises to 50-100°C, add the coupling agent and stir evenly, then add PVC resin, plasticizer, foam Foaming agent, stabilizer and modifier, etc., and finally...

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Abstract

The invention discloses a preparation method of a polyvinyl chloride (PVC) low-foaming wood plastic composite. The wood plastic composite comprises the following raw materials in parts by weight: 100 parts of PVC resin, 40-80 parts of wood fiber, 4-5 parts of stabilizer, 5-15 parts of plasticizer, 5-10 parts of modifier, 2-4 parts of lubricant and 0.2-1.0 part of AC foaming agent. The preparation method comprises the following steps: mixing the raw materials with a high-speed mixer, and pelletizing to realize extrusion molding. By adopting the preparation method, the higher filling volume of wood fiber can be ensured and the product has lower production cost and higher operational performance; in the preparation method, the formula of raw materials is configured reasonably and the calcium zinc composite stabilizer is used; and hydrotalcite can also be used for optimization, thus the mechanical properties of the material and the stability of the product can be further increased.

Description

technical field [0001] The invention relates to the technical field of composite materials, in particular to a preparation method of PVC low-foaming wood-plastic composite material. Background technique [0002] PVC (polyvinyl chloride)-based wood-plastic composite material, as a new type of wood substitute material, can be widely used in architectural decoration and packaging, such as corner lines, particle boards, curtains, door pockets, floors, fences, skirting boards, Art boards, shutters, picture frames, photo frames, window frames, toys and general furniture, interior doors, etc. Most of the indoor and outdoor decorative building materials can be made of PVC wood-plastic materials. It is particularly worth pointing out that, in addition to bringing fire hazards, the use of logs to process and make decorative materials is also prone to mildew and insects, which brings potential safety hazards. And PVC wood-plastic completely abandons the shortcomings of logs, improves ...

Claims

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Application Information

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IPC IPC(8): C08L27/06C08L97/02C08L23/28C08K13/02C08K3/26C08J9/10
Inventor 辛春燕聂兆斌张龙喜
Owner SHANGHAI BESTON PLASTICS
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