CN1292398A

CN1292398A - Wood flour filled PVC product

Info

Publication number: CN1292398A
Application number: CN 00129935
Authority: CN
Inventors: 丁澎; 刘学东
Original assignee: Individual
Current assignee: Individual
Priority date: 2000-10-19
Filing date: 2000-10-19
Publication date: 2001-04-25

Abstract

The present invention relates to a wood powder filled PVC product which is made up by using powder made of the materials of waste wood material, crop stalk and fruit shell as filling material and PVC plastics and adopting the processes of mixing and existent extruding technique. Said invented product can be made into plastic wood moldings with different qualities and varieties as imitation of pear wood, basswood, red zelkova schneideriana wood and white birch, etc. Said invented plastic wood molding possesses good preservation and fire-resisting properties, and possesses excellent machining property, can be substituted for wood molding, and has no need of sand-polishing and painting, and can be extensively used for decoration of indoor and outdoor buildings.

Description

Wood flour filled PVC product

The present invention relates to a kind of is the wooden composite chemical building materials-Wood flour filled PVC product of moulding of main material production with polyvinyl chloride resin and wood powder.

As everyone knows, the thermostability of pure polyvinyl chloride resin, shock resistance and processing characteristics are poor, price is also somewhat expensive, therefore, all to add an amount of stablizer in the general PVC goods, properties-correcting agent and lubricant etc., in order to reduce the goods cost, increase the rigidity of goods, also to add some filler, as lime carbonate, kaolin, talcum powder, carbon black etc., at present with the most use is lime carbonate, the adding of these fillers though improved the rigidity and the dimensional stability of goods, can cause the decline of goods shock strength and tensile strength, influence the machining property of goods, so this goods are mainly used in plastic door-window section bar (referring to " the plastic door-window manufacturing new technology " of China Light Industry Press's in June, 2000 publication) at present, and are requiring goods to have the good mechanical processing characteristics, when installing and using, require and to follow closely, the decoration field purposes that can dig is less, and this field also is subjected to the influence that people favor wooden product consumer psychology.

The object of the invention is exactly in order to satisfy the requirement of this consumer psychology and traditional decoration, providing a kind of is decorative effect with natural timber and the good mechanical processing characteristics that main raw material is made with polyvinyl chloride resin and wood powder, have the outstanding feature of plastics and timber concurrently, not only waterproof, fire-retardant and can follow closely, can dig, have certain elasticity is used for substituting the Wood flour filled PVC product of timber in indoor and outdoor is decorated.

To correlation technique retrieval of the present invention, check in disclosed two patent of invention technology both at home and abroad, wherein one is domestic " plastics filled with wood chips " (application number is 88101567.9), technology contents is: " after the mixing of raw materials such as plastics, wood chip; use twin-roll machine, press molding machine compression moulding; product has the leather sense, can make imitative leather goods ", and its goal of the invention is all different with the present invention with technical matters; Another is the JP8333469 " wooden PVC goods " (classification number belongs to C08J9/06) of Japan, and its production technique is also different with content of the present invention.

The object of the present invention is achieved like this:

With 100 parts of hard PVCs, 10-80 part wood powder is benchmark, adds:

(1) 2-4 part dibasic plumbous sulfite

The impact-resistant modified Resin A CR of 8-20 part

1.0-2.0 part ACR processing aid

1.0-2.5 part calcium stearate

0.05-0.2 part Ployethylene Wax

(2) at least a in lime carbonate, tinting material, fire-proof smoke suppressor, the AC whipping agent, above-mentioned raw materials is through mixing, granulation, again by extrusion shaping machine between 120 degrees centigrade-200 degrees centigrade of plasticating temperatures, water coolant is extruded the woodwork of moulding of making the different section shape below 20 degrees centigrade.

In the raw material of the present invention: the dibasic plumbous sulfite is a kind of thermo-stabilizer, mainly prevents to degrade in the PVC course of processing, improves the quality of products, and gives goods good weathering resistance simultaneously; The ACR impact modifier belongs to acrylic acid esters co-polymer, in order to improve the fragility of PVC, increases resistance to impact shock, improves ageing-resistant performance; The ACR processing aid is in order to reduce the PVC plasticization temperature, to improve fluidity of molten and homogeneity, improving surface luster; Calcium stearate and Ployethylene Wax lubricate in the course of processing reducing between material and the processing units and the frictional force between the material, thereby prevents the degraded because of the excessive PVC of causing of frictional force, improves the efficient of thermo-stabilizer; The AC whipping agent is a kind of heat release type whipping agent commonly used, mainly in order to reduce extrudate density, improves absorption shock load ability and heat insulation sound absorbent effect; Lime carbonate and wood powder are stopping composition, to reduce product cost, lime carbonate can also increase melt rigidity, be convenient to the typing of melt extrusion thing, the adding of wood powder has not only improved the rigidity of goods, and has improved the anti-impact, sound absorption qualities, machining property of goods and drawn ability aspect the opposing at nail puller; Adopt the color coordination of different tinting materials and wood powder can copy the goods of unlike material.

Above-mentioned wood powder is with wood-curing waste, crop stalk, shell drying, pulverizing, grinding, crosses the 80-200 mesh sieve and carry out surface activation process with coupling agent again and make.

Providing a specific embodiment below is described further:

Get 100kgPVC, 35kg wood powder (crossing 120 mesh sieves), 2.5kg dibasic plumbous sulfite, 10kg impact modifier ACR, 1.5kgACR processing aid, the 2kg calcium stearate, 0.1kg Ployethylene Wax, 2kg lime carbonate, 0.5kg the azo diformazan mills amine, 0.0006kg molybdenum red, wood powder is handled with titanate coupling agent earlier, it is standby that above-mentioned raw materials mixes back extruding pelletization on single-screw extruder, then by normal expressing technique, under 140 degrees centigrade of-180 degrees centigrade of effects of forcing machine plasticization temperature, material becomes the fusion viscous state gradually, under the promotion of rotary screw to the heading spiral motion, extrude the parison of the product section of closely drawing up by extrusion die, the parison vacuum cooling is finalized the design with 15 degrees centigrade of-20 degrees centigrade of recirculated cooling waters through shaper again, reach the required design shape of goods.

Sample of the present invention is red beech look, appearance exactly likes timber, can follow closely, can dig, can saw, detect through national inspection centers, shore hardness is 80 degree, can satisfy the indoor and outdoor wood strip and decorate requirement, density is the 608kg/ cubic meter, adjusts whipping agent and wood powder consumption, controllable density is between 0.45-0.90, close with timber, its water-intake rate is no more than 3%, and general timber is greatly about more than 12%, show and mould woodwork in the special best performance of anti-water aspect anticorrosion, the vicat softening temperature of goods is 76 degrees centigrade, and flexural strength is 21MPa, draws aspect the opposing suitable with timber at nail puller.

Residue waste material in the present wood working, wood chip, crop stalk, resources such as shell, except that small part is reused, major part is burned or the nature that goes out of use rots, cause the wasting of resources and environmental pollution, the present invention is with Wood flour filled PVC, but direct saving timber about 70%, 30% is that waste utilizes again in addition, the product japanning of need not polishing, can save japanning cost of upkeep and use and maintenance expense, adjust the wood powder consumption and change different extrusion dies, can copy out pear wood by changing the tinting material kind, linden, red beech, unlike materials such as white birch, different varieties mould wood strip, product has the favorable mechanical processing characteristics, can substitute traditional wood strip fully, be widely used in indoor and outdoor decoration and city public construction, improve the fitting-out work environment greatly, reduce finishing labour intensity, improve the finishing working efficiency.

Claims

1, a kind of is the Wood flour filled PVC product that basic raw material is produced with polyvinyl chloride resin and wood powder, makes like this:

Wood powder with 100 parts of hard PVCs, 10-80 part is a benchmark, adds:

(1) the impact-resistant modified Resin A CR of 8-20 part

1.0-2.0 part ACR processing aid

2-4 part dibasic plumbous sulfite

1.0-2.5 part calcium stearate

0.05-0.2 part Ployethylene Wax

(2) at least a in lime carbonate, AC whipping agent, tinting material, the fire-proof smoke suppressor, above-mentioned raw materials is through mixing, granulation, again by extrusion shaping machine between 120 degrees centigrade-200 degrees centigrade of plasticating temperatures, water coolant extrusion moulding below 20 degrees centigrade.

2, Wood flour filled PVC product according to claim 1 is characterized in that: used wood powder is usefulness timber, crop stalk, shell material, and drying, pulverizing, grinding, mistake 80-200 mesh sieve carry out surface activation process with coupling agent again and make.