JPS5978839A - Molding method of wood looking foamed resin molding - Google Patents

Abstract

PURPOSE:To obtain the titled molding having functions and an appearance property peculiar to wood material by mixing a liquid thermosetting resin with a dry wood meal, a foaming agent and polymerization catalyst to be foamed with a mold into which the mixture is injected. CONSTITUTION:A liquid thermosetting resin such as polyurethane resin and a urea resin is mixed with a dry wood meal or a timber powder such as particle board ground powder at the rate of 60-80%, additionally a foaming agent with a low boiling point such as fleon, propane, butane or pentane and a polymerization catalyst such as cobalt naphthenate and dimethyleaniline. Then, the mixture thus obtained is injected into a mold to be foamed at the normal temperature. Thus, the intended molding is obtained as a board such as wall surface material and ceiling material and component material for various buildings or furniture. Said wood meal is a fine dry powder which promotes the dissociation of wood vinegar contained in a heat drying while water content is preferably within 8%.

Description

[Detailed Description of the Invention] This invention has features unique to wood materials, such as external viewing features! +5-calyx T
Foamed synthetic resin Eisugi products, especially low coefficient of thermal expansion,
There is no distortion in i'd shape or bY color, and FJY is made by regular foaming of cedar products with excellent abrasion resistance, bending strength characteristics, and processing characteristics. It is.

Therefore, in the past, this kind of foam club FW, City fat gllll
The reinforcement of A product is usually planned by adding or mixing non-fRkw materials such as glass fiber and rock wool.
In order to maintain a low cost, we have recently begun using Hg-based vinyl, foamed borjet, etc. 4, 8 foams of acrylic triluene, 1,000 len, etc. + 3 itilt fat material Nakabanko wood powder or similar cellulose material? This was an attempt to strengthen the 41-year-old cedar product by mixing it with it.

＼7-Does mixing the required amount of wood powder into the Seisai rut oil improve the strength of the resin molded product? The AI cliff is approximately twice that of non-contaminated mature cedar products, and the distortion rate during and after the 11i process is significantly lower, and the wear resistance is also increased! It is a particularly improved version of l11:, and is an ideal cheap reinforced dark fat cedar product with a special meaning.

However, in the conventional 5V and color products, there is a certain limit to the inclusion of wood flour as an aggregate, and it is not possible to obtain a color tone or mass feeling that is closer to that of wood Along with the shortcomings, even in the custom-made, heat-insulating properties, and custom-made processing, the characteristics unique to the fat material cannot be overcome, and when heated and burned, there is no harmful gas. However, in the previous methods, the molding method was usually extrusion or injection molding, and during molding, the flow of the mixed wood powder itself or the pattern resin material was minimized. In addition to significantly increasing the rubbing resistance against the inner wall surface of the demolition cylinder or the sliding surface of the screw, etc., this requires a larger In particular, it has decreased.

This also particularly wears out the inner surface of the molding machine, which reduces the service life of the molding machine, and also causes more internal pressure on the die or mold surface, leading to die breakage, wear, or damage to the inner surface of the mold. Breaking habits.

This induced wear and at the same time caused surface roughness of the molded article.

In the case of my father and subordinate, wood acid, especially acetic acid, etc., is generated during heating or heating, and the use of this generated wood acid in the aVIN machine cylinder cylinder (oscrew or die or the inner surface of the mold, etc.). This significantly reduced the frequency and also caused roughness on the surface of the molded product.

In the previous method, a large amount of steam was induced by mixed wood powder, etc., which adhered to the mold surface, causing problems with the surface roughness of the molded product and deterioration of the strength of the molded product.

Furthermore, in the conventional method, the mixed wood powder and the mixed wood powder did not become completely integrated (mixed wood powder).
IIi]ri'rIc滝暉、Bubbles etc? This significantly reduces the strength of the molded product.

In view of the inconvenience in the prior art, the method for molding the reinforced foamed resin fiY-shaped product according to the present invention is to heat and dry the wood powder itself to be mixed in, and remove the acetic acid contained in the wood powder. At the same time, the wood acid is dissociated and volatilized, and the moisture contained in the wood powder is reduced to about 3 to 8 inches, and the particle size of the wood powder used is adjusted to 50 to 150 mesh. ,
My father, W Sugi's method @ foaming and 1. /,heating[? This is a complete reversal of the inconveniences associated with this. (Nimata, extrusion,
In order to eliminate the inconveniences caused by injection in the air, a special injection molding method at room temperature was used to prevent damage and wear and tear on the equipment.

With such special consideration, we have eliminated the possibility of wood acid gas generation and water vapor generation during molding, reducing the risk of wear and tear on the Fi51 machine, especially severe wear and corrosion. It provides a molded product that can be cleaned easily and has good one-sided customization, and at the same time, the grain size is fine to improve compatibility with mixed materials.

Father, is there a limit on the amount of mIrfI material that should be mixed in? By using wood powder as the basic aggregate and creating voids between the aggregates and foaming, it is said that the traceability is particularly good compared to the conventional Y board, and the mixed resin material is eliminated. It is said to be a Nl'l peak-like structure in which wood powder is encapsulated and connected from one side to the other, and this is what affects the mechanical properties such as bending strength and impact resistance of the finished board. It was rated as good.

According to my father, Kazuei, it is said that the vF strength 1 on the board was more similar to wood, not only in color tone but also in texture, and in terms of gJ cutting or nailing. It can almost be treated as wood during processing. In addition to these characteristics, the fragility of wood materials has been eliminated in terms of custom insulation and water resistance.

The following is an example of the method of coloring a wood-like light f@resin cedar product according to the present invention. First, dry wood flour or wood powder of 1i Particle Board [No. A foamed material with a low boiling point such as Freon, propene, butane or pentane, and a polymerization catalyst are mixed into the mixture, and the mixture is injected into a mold to form a mold for regular TLT+foaming, as well as boards for wall materials, ceiling materials, etc. Provision of decorative materials for architecture or furniture/1-

In addition, the IIPIL medium shall be selected and used appropriately according to the type of heavy enclosure material to be used. Various materials such as Real-N-11 can also be cured as needed, including polyamide-based, amine-based, acid anhydride, polysulfide rubber, chlorosulfonated polyethylene, peroxide pencil, lauryl-meroxide, etc. It was planned that the additive would be used as an agent.

Next, injection into the cedar-shaped mold is planned to be carried out either under normal pressure or under pressure, depending on the surface shape used depending on the purpose of molding and the type of product to be molded. The pressure settings are the same.

Furthermore, during injection into the mold and foaming, this injection layer is added to promote the foaming action and to shorten the foaming hardening time.

Father, in the article, this bar thousand-cycle board powder is a sanding powder of bar thousand-cycle board that has been hardened, and is generated in relatively large quantities and has properties, color tone, and texture that are generally similar to wood powder. In particular, aggregate and
'This is another problem, and wood acid gas is generated due to heat generation during foaming and other inconveniences! ! It is what was done.

The wood powder used in this step is as fine a powder as possible, and has been appropriately selected within the range of 50 to 150 mesh, and has been sufficiently heated and dried. It was designed to keep the water content within the range of 3 to 8%.

In heating and drying this wood powder, acetic acid, etc., which are normally contained in the wood powder, react with H2Ofs in the wood powder, dissociate and repeat, and the moisture content in the wood flour decreases. As a result of this decrease, the dissociation of residual lactic acid was suppressed by 9 losses or 1 loss. mosquito\
#Fijl using wood flour under different dry conditions as aggregate!
By using this product, we hope to achieve specific results from the above-mentioned custom orders.

The wood powder thus provided is used as aggregate 1), and mixed into liquid thermosetting resin and foamed to form aggregates 111 to 1).
The foamed voids 13) are defined, and the aggregates (11) and 11) are each encapsulated with a resin film 121, making it appear as if they were connected as one body. Gap 13; peak with membrane 121) connected in a nested manner, l9kII+1! It is what was done.

In the case of a 1% dragon content, the aggregates are mutually 7) 1
While touching +i, a foaming void 131 is formed between the adjacent bones, and what's more, is it kneaded? Minenosu-like membrane 12)? Since it was connected, 1. A custom-made recorder.
L, this is something that is expected to be effective for fishing.

That is, since the aggregate Ill~width was punched so that they were in contact with each other, the fragility in the load strength,
As a result, bending strength 1, S impact resistance strength, shape retention strength, etc. are dramatically improved due to the custom-made Minenosu-like pottery using the common FIL film 121, and it is also possible to improve the 1st grade fat-saving cumulative material. Inconveniences as a b1 fat board by reducing f, especially the occurrence of 5'l cedar distortion, combustion special program Ko V
- It is intended to eliminate the possibility of generating gas during nailing and the occurrence of cracks during nailing, and also to improve the cutting properties of wood materials.

In addition, since the phrenoid '11 was all ruptured with a film 12), it is said that the woody material (() is particularly good in water resistance and wear resistance, and is seen in the woody material 11). Unlike regular wooden materials, it is possible to process river gravel by cutting, nailing, etc.

However, due to the presence of wood flour as the main raw material of the material and wood flour as an aggregate, it is possible to achieve the same coloring or processing as that of other resin boards, as well as Minsei cedar. is O
It was considered to be T-Noh.

Book≠Ming Shimogashi Eisugi [Same λ as here]
Cedar method? This made it possible to supply Akira Tsuki, who listened to the above-mentioned custom order, and has a good quality material with a low external expansion rate and little distortion due to compositional changes in the W cedar tokiyoshi. F
H. It is made possible to chew cedar wood.

As a custom-made product, it has good strength, and of course has sufficient hardness, and its surface abrasion resistance has been significantly improved.

Historically, in terms of materials, the introduction of wood as the main raw material and resin as a mere coating12 led to the development of normal woodworking.1
In addition to making it possible to process with milk, the surface treatment with lacquer, paint, etc. is also perfected, and at the same time, the color of the wood #F selvedge due to the mixed wood flour promises to be a successful product.

Especially as a woodworking material, does the entire cut surface have wood-like characteristics? It has the effect of being made of wood-like material and synthetic resin material by spraying, molding, pasting of decorative sheets, etc. as in previous examples.

[Brief explanation of the drawing]

Figure 1 is an enlarged sectional view of the main part of the foamed Z cedar product, and figure 2 is an enlarged sectional view of the container of the foamed W cedar product. In addition, in 1 (11... bone phase, 12:... membrane, 1
3;... Gaps are shown. Patent Applicant Sumitomo Forestry Co., Ltd. Iso Engineer 11 Ngami Type Company Representative Patent Attorney Minoru Kuwa TjA Figure 1

Claims (1)

[Claims] (1) Wood flour dried into liquid thermosetting wood 60~8
Development of wood-like foamed 5L cedar product characterized by mixing (2) ester, adding foaming agent and polymerization catalyst to the mixture, injecting it into bVFf4 mold, and performing foam molding. Method. 12] The wood flour is made into a fine dry powder, and the wood acid contained in it is dissociated during heat drying. Did you help and bring the water level to 8 points or less? 1 in the first claim of the characterized patent claim
From Itoruki IJQ / 181 light resin■ How to color cedar products. 13) A method for coloring a wood-like foamed four-fat open cedar product as described in the patent claim, characterized in that 5Z cedar internal pressure is applied at the step of removing the color.