JPS58204050A - Reinforced resin molded article - Google Patents

Abstract

PURPOSE:To obtain the titled molded article having excellent wear characteristics and strength, by adding a thermosetting resin to wood powder or a woody material, heating the mixture to cure it, crushing the wood powder, bleaching it, drying it, mixing it with a thermoplastic resin material, and molding the mixture. CONSTITUTION:Wood is finely divided by sanding to obtain powder having a particle size of 120 mesh or finer. Alternatively, a thermosetting resin material is added to a woody material such as wood chip. The mixture is pressed with heating to cure it, cut and crushed to obtain powder having a particle size of 120 mesh or finer. The wood powder or the woody powder is decolored by using a bleaching agent contg. an alkaline material such as hydrogen peroxide bleaching agent contg. sodium chlorite and dried to reduce the water content to 1-5%. 3-50% said powder is mixed with a thermoplastic resin material such as vinyl chloride resin, ABS resin or polystyrene resin. The mixture is molded to obtain the desired reinforced resin molded article.

Description

[Detailed Description of the Invention] This invention relates to the provision of a blank reinforced resin molded product that has a low expansion coefficient, less distortion during or after molding, and has excellent abrasion characteristics and bending strength characteristics. It is.

Therefore, the conventional method of strengthening resin molded products was to mix in S-quality materials such as glass fiber and rock fiber, but it is necessary to bring a more natural feel to resin molded products. In order to maintain low molding costs, wood powder or similar cellulose materials have recently been mixed into materials such as polyvinyl chloride, polyethylene, acrylonitrile-butadiene-styrene, etc. It is.

Mixing the required amount of wood powder into the molding resin increases the strength of the sawdust molded product, especially the bending strength, approximately twice that of the non-mixed resin molded product. In addition to making the subsequent strain rate extremely low, the premature wear resistance is particularly improved, and it is important to provide an ideal and inexpensive reinforced resin molded product.

However, despite the excellent properties of the molded product, there are some products that significantly reduce the molding properties of the resin due to the properties of the wood material Ranyu mixed in, resulting in higher molding costs. .

That is, when wood powder is mixed in, the mixed wood powder itself extremely inhibits the fluidity of the molding material (wood) and also increases the frictional resistance by 8 fM against the inner wall surface of the molding machine cylinder or the sliding surface of the screw, etc. FlI a large molding machine
In addition, the moldability per hour is 8-8.
If the pressure is reduced, it will cause excessive internal pressure on the die or the metal surface, resulting in damage to the die, wear, or damage to the inner surface of the mold.
This caused wear and tear and at the same time caused the surface of the molded product to come off.

In addition, in the previous case, mixed wood powder generated a large amount of wood and acetic acid during heat molding, and this wood acid caused the cylinder, screw, die, mold, etc. of the molding machine to be reused. ILL on the surface of the molded product.
This is what caused the turmoil.

In the previous method, multiple vapors were induced by the mixed wood powder, etc., and this layered on the mold surface, causing problems with surface roughness of the molded product and deterioration of the molded product. It is something.

In addition to these inconveniences in molded products, the wood powder is colored by the unique pigment of the wood powder mixed into the molded product, making it difficult to provide white or colorful resin molded products. Give up what you have.

The reinforced resin molded article that is one aspect of the present invention was specially devised in view of the inconveniences in the conventional VU, and it is capable of decolorizing wood powder mixed in and reducing the amount of carbon dioxide contained in the wood powder. It removes moisture and wood acid, and produces a unique color in wood powder as a q material. At the same time, it also eliminates scratches on the surface of molded products due to generated water vapor, gaps between residual air bubbles inside the molded product, and cracks on the side columns of molding machine cylinders, dies, molds, etc. due to wood acid scum, and on the surface of molded products. It was suppressed for once.

In particular, the present invention makes it possible to produce not only icy white resin molded products but also brightly colored resin molded products exhibiting a desired color tone.

F1 A typical example of the reinforced resin molded product according to the present invention will be described below. Wood is made into powder finer than 120 mesh by sanding etc., and the powder is mixed with A hydrogen oxide solution and sodium chlorite solution. Also, alkaline type admixtures, especially OH
Combining the neutralizing agent of 4 (decolorized overnight, during bleaching of the powder grains, the pigments of the wood powder and the insects themselves are removed, and the white ground-like mixed aggregate 7) is submerged. At the same time, the wood acid contained in the wood powder is neutralized, and there is no room for wood acid gas to be generated from the mixed aggregate during the subsequent molding process.

In addition, the cell nuclei in the wood powder are destroyed during the bleaching process, which ensures effective dehydration and creation of extremely dry conditions during the subsequent turning process.

After drying the thus bleached wood powder grains to a moisture content of about 1 to 5%, they are mixed into thermoplastic resins such as vinyl chloride resin, ABS resin, and polystyrene resin in a range of 3 to 50%. It is molded in resin.

It should be noted that it is naturally planned to apply an appropriate coloring to the wood J[Z that has been white-washed, and can be used as a coloring material in molded products to provide molded products with the desired color tone. This made it possible.

Next, unfavorable materials such as wood chips are added to the steamed wood powder using a thermosetting resin material.
It was planned separately that the bonded materials would be polished by sanding to produce wood powder grains that were finer than 120 mesh, and one mortar of the resulting powder grains would be mixed into the molded product by dry sanding. This makes it a more effective aggregate than powdered grains.

In other words, when sanding wood branches made of this thermosetting resin material as a lumber material, the effect of mixing the thermosetting resin material, the moisture content of 1-4f during heating, and the number of branches. The finer, consistent powder particles of the mesh are obtained by gasification and removal.In addition, when such powder is used as a material, the resin contained in the aggregate itself is removed. The material is guaranteed to have a flat surface, and the frictional resistance of the mixed aggregate during molding is particularly reduced, making it possible to mold it using the same method as molding general resin materials.

In addition, molding for molding or especially thick): In the case of molded products, etc., azodicarbonamide, azobisformamide 1, abisisobutyronitrile are added to the material. It was planned to mix in suitable foams such as barium, azobiski, N, N' dinitroso, N, i'J' dimethyl terephthalamide, etc., according to the shape of the foam head.

Incidentally, 1. Method 4 of compounding 1. Sohaku agent in the description is not limited to Relibo, but also includes sodium peroxide, sodium perborate, permanganese RG potassium, Sarashi powder 1. ．． 4. The use of other equivalent Ippaku agents, such as Mesarashi's first and second dish, Sotaka Natori Tsum, and Aueki Ken Sodium, is pre-electrified.

In addition, the creation of the aggregate exemplified in the above is based on the purpose of creating the aggregate exclusively, but it is possible to create the aggregate using IMT, which is made of commercially available particle board.
Naturally, it was planned that the 111 powder produced at °C during grinding would be used as mixed aggregate for some time, and its forming method and composition were the same as the mixed aggregate used in steamed φreli. It's a little thing.

The use of particle board I411 powder promises to further reduce molding costs for aggregate molding in the steaming example. In other words, particle board pressure-formed using an unusual hot press is polished on one side or l1
l (l u1) The abrasive material M generated by the grinder is enormous, and there are many NA'E!L particles in the process. The use of board abrasive powder has been instrumental in reducing the cost of molded products in a similar sense.

In addition, the aggregate used for steaming has a low moisture content, as the moisture content of the aggregate is reduced to 1 to 54 degrees through a series of pretreatment processes such as neutralization and drying of wood powder particles. The generation of water vapor during molding is reduced as much as possible by mixing aggregates.
This prevents the molded surface from becoming loose and also prevents the inclusion of various air bubbles.

The reinforced resin molded product according to the present invention has a characteristic structure during steaming, and it is possible to provide a molded product having the above characteristics using the same molding method as in ordinary resin molding. It has a low coefficient of thermal expansion, and it is possible to provide a good molded product with less sludge due to compositional changes during molding and VC.

Also, it has strong bending strength as a characteristic characteristic of i7! The glue is also made of light and has excellent long-surface wear characteristics! , 'I length.

Furthermore, I cut the wood thread on the piled material surface (iL person), and used the ordinary woodworking machine 1 and 2 to process it using machine 4.
When it is done, the paint and paint (by now, it is said to be perfect, and at the same time, the tree's reeds mixed in with the wood have a unique color tone, giving the impression of crystallization). To provide a molded product that can be bundled with +"J and have any color tone from a white background.

First of all, as a woodworking material, C has a wood-like appearance on all cut surfaces, and unlike the conventional wood material, which has been sprayed, αV attached, or pasted with a decorative sheet, it is made of synthetic resin. J
There is an effect that does not make you use g-years-old.

patent originator Dingying Engineering Link Co., Ltd. Agent - JfIF! ! scholar Minoru Kancho

Claims (1)

[Scope of Claims] +11 A thermosetting resin material is added to wood powder or a wood material, heat-pressed and cured, and then the wood powder obtained by crushing with a cutting P31 s is mixed with an alkaline admixture. 1. A reinforced resin molded article, characterized in that the powder is decolored with a bleaching agent, and the powder is dried and molded into a thermoplastic resin material for 3 to 50 hours. (2) The deposited resin molded article according to claim 1, wherein the bleaching agent is a mixture of hydrogen peroxide and sodium chlorite. (3) The reinforced resin molded article according to claim 1, characterized in that the moisture content in the powder particles is 1 to 5 g. (4) The reinforced resin molded product according to claim 1, wherein the powder particles have a particle size smaller than 120 mesh.