JP2002187990A - Resin composition reusing vinyl chloride wall paper and woody composite molding prepared therefrom - Google Patents

Abstract

PROBLEM TO BE SOLVED: To effectively utilize all components of a vinyl chloride wall paper, in which a vinyl chloride component/a vinyl chloride layer is strongly impregnated/covered in/on a paper layer of a substrate so that it is difficult to completly separate both of the components from each other to effectively utilize them, and which has almost been discarded in the past, thus making possible to reuse the wall paper as woody composite moldings for which many uses are expected. SOLUTION: It becomes possible to obtain a resin composition for cheap woody composite materials which have practical strengths, extrusion molding properties, good appearances rich in woodiness, and excellent touch, by mixing under heating 100 pts.wt. of a mixed composition comprising 10-90 wt.% of a crushed vinyl chloride wall paper, 5-65 wt.% of a wood powder and 65 wt.% or less of a vinyl chloride resin with 1-10 pts.wt. of a processability modifier and/or 0.2-5 pts.wt. of a lubricant, and further to obtain a woody composite molding prepared therefrom.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a resin composition and a wood-based composite molded article in which all components of a vinyl chloride wallpaper are effectively reused. More specifically, the present invention relates to a resin composition having both required physical properties and moldability. COMPOSITION FOR PRODUCING WOOD COMPOSITE MOLDED ARTICLES HAVING EXCELLENT EXTERNAL AND EXCELLENT TISSUE WITH THE OBJECTIVE OF Obtaining Inexpensive Molded Article Material and Wood Composite Molding Produced from This Composition About goods.

[0002]

2. Description of the Related Art Vinyl chloride wallpaper is made by strongly impregnating and coating a vinyl chloride component of a vinyl chloride layer on a fiber of a paper layer of a base material, and a paper component (paper layer) and a vinyl chloride component (vinyl chloride layer). It is extremely difficult to completely separate and effectively utilize each. JP-A-5-59696, JP-A-6-1
73200 and Japanese Patent Application Laid-Open No. 11-293600 disclose a method of improving the releasability of a paper layer and a PVC coating layer to separate and reuse a PVC component of the coating layer. Most of the wallpapers are not applied.

[0003] For this reason, in the past, almost unused vinyl chloride wallpaper was landfilled, but in recent years, there has been a request for reuse for environmental conservation and recycling. In order to solve such a problem, for example, Japanese Patent Application Laid-Open No. 52-789
No. 79 discloses a method of wetting a PVC wallpaper, crushing it with an intensive mixer, selecting only the PVC pieces, and mixing the resin alone or with a virgin resin to reshape it as a new PVC wallpaper. However, it is difficult to reuse the paper layer by this method. Also, JP-A-6-14838 and JP-A-6-1267
No. 45 discloses a method of pulverizing polyvinyl chloride wallpaper and forming a plate-like material with a high-frequency welder or an extruder.
Discloses a method in which a paper layer and a PVC layer are separated by fine pulverization with a jet vortex, but the strength of the obtained molded product is insufficient and the range of use is limited. Although it is difficult to completely separate the paper component and the vinyl chloride component, some separation is possible by crushing and specific gravity / wind separation.

However, the main component of the vinyl chloride layer is composed of a vinyl chloride resin and additives, such as a filler and a plasticizer. Not suitable for reuse in For this reason, a method has been developed in which it is mixed with another thermoplastic resin and reused as a building material such as a floor material by, for example, press molding, but its use is limited and its effective use has not been achieved. On the other hand, since the separated paper component contains an unseparated vinyl chloride component, it is extremely difficult to reuse it as paper and it has been landfilled.

[0005]

As described above, even if the paper component and the vinyl chloride component of the vinyl chloride wallpaper can be separated,
Recycling requires a considerable cost, and a recycle destination other than a limited use such as flooring material cannot be found. Therefore, an object of the present invention is to focus on the material of a wood composite molded article that can be expected for many uses such as building materials when reusing vinyl chloride wallpaper, satisfy the necessary physical properties and moldability as a composite material, and Another object of the present invention is to provide means which can be manufactured at low cost by using existing molding equipment.

[0006]

In order to achieve the above-mentioned object, the present inventors have prepared a vinyl chloride wallpaper by separating all the components, that is, the paper layer of the paper layer, without separating the paper layer and the vinyl chloride layer. An attempt was made to effectively utilize the components, the vinyl chloride resin contained in the vinyl chloride layer, and the additives such as fillers, plasticizers, pigments, and heat stabilizers. The paper component of the vinyl chloride wallpaper is a cellulose fiber similarly to wood flour. When the vinyl chloride wallpaper is pulverized, heated and melted to form a molded article having a woody appearance.

[0007] However, since it contains a large amount of fillers and plasticizers, the resulting molded article has a flexural modulus of about 300MP.
With a flexural strength of about 10MP, rigidity and strength are insufficient, and are not suitable for materials for building materials. Also, the wood texture is insufficient. To solve this, add wood flour to the PVC wallpaper.
Flexural modulus, flexural strength and woody feel are improved. However, excessive addition of wood powder lowers the vinyl chloride component ratio, and roll kneading and hot pressing are possible, but in the case of extrusion molding, the resin component and paper, wood powder, filler, etc. are sufficiently melted. It becomes impossible to mold without kneading. When vinyl chloride resin or the like is added to compensate for this, the moldability is improved, but when added excessively, the woody feeling is insufficient.

In order to solve these problems, in the present invention, there is provided a mixture of vinyl chloride wallpaper and wood flour or a vinyl chloride resin or both components, and a processability improver for imparting optimum moldability. By optimizing the lubricant formulation, we plan to reuse it as a wood substitute material, which is expected to be widely used as a substitute for wood, such as handrails for houses, interior materials such as baseboards, exterior materials such as decks, fences and floors, and furniture materials. It became possible.

As described above, the present inventors have found that when recycling vinyl chloride wallpaper, all components, that is, the paper components of the paper layer, are separated without separating the vinyl chloride wallpaper into a paper layer and a vinyl chloride layer. An object of the present invention is to effectively utilize a vinyl chloride resin contained in a vinyl chloride layer and components such as a filler, a plasticizer, a pigment, and a heat stabilizer, which are additives thereof.

[0010] For this reason, by mixing wood powder and vinyl chloride resin with vinyl chloride wallpaper and optimizing the processability improving material and the lubricant formulation to give optimum molding processability, a crusher, a mixer, an extruder, etc. Resin composition for molding an inexpensive woody composite material having an appearance and feel rich in practical strength and extrudability, and a woody feel, and a woody composite molded article obtained by extrusion using the same Invented.

That is, the present invention relates to 100 parts by weight of a mixed composition containing 10 to 90% by weight of crushed vinyl chloride wallpaper, 5 to 65% by weight of wood flour and 65% by weight of vinyl chloride resin.
1 to 10 parts by weight of a processability improver and / or 0.2 to 5
A resin composition obtained by heating and mixing parts by weight of a lubricant (claim 1); and a granular resin composition for a wood composite material obtained by sizing the resin composition to a size of 10 mm or less (claim). Item 4), a pellet-shaped resin composition obtained by granulating the granular resin composition to a diameter of 5 mm or less and a length of 10 mm or less (Claim 5), and extrusion molding using these resin compositions It is a molded article characterized by the above (claim 6).

In the above resin composition, the processability improver is more preferably a (meth) acrylate-based polymer (Claim 2). Preferably, the lubricant is a polyethylene wax. In the present invention, the size of the granular resin composition is 1
The term “0 mm or less” means a size that can pass through a hole having a diameter of 10 mm of a punched metal attached to a crusher, and has a maximum diameter of 10 mm or less.

[0013]

BEST MODE FOR CARRYING OUT THE INVENTION Hereinafter, the present invention will be described in more detail.

The vinyl chloride wallpaper used in the present invention is, for example, a defective product, scrap material, a long-term defective stock, a wallpaper generated at the time of remodeling or dismantling in a vinyl chloride wallpaper manufacturing process, but is not limited thereto. Not something. Further, the color tone of the wallpaper to be used is preferably a wallpaper having a high brightness such as a white color or a beige color. This is because when mixed with wood flour, a color tone close to that of natural wood is obtained. When a dark-colored wallpaper having low brightness is used, a large amount of a pigment for a complementary color may be required.

The vinyl chloride wallpaper is composed of a paper layer serving as a base material and a vinyl chloride layer coated thereon, and the ratio of the paper layer is generally 20 to 30% by weight. The composition of the vinyl chloride layer is composed of a vinyl chloride resin and additives such as a filler, a plasticizer, a pigment, and a heat stabilizer. The wallpaper is preferably crushed to a size of 10 mm or less in order to achieve uniformity when mixed with the wood powder and the vinyl chloride resin by heating. For the crushing of wallpaper, a general-purpose cutter-type crusher composed of two fixed blades, three rotating blades, and a grid-shaped punching metal, which is advantageous in terms of crushing processing capacity and equipment costs, can be used. . When the wallpaper is treated with this crusher, the wallpaper is simply cut into small pieces without removing the paper layer and the vinyl chloride layer of the substrate.

Further, for crushing the wallpaper, an impact shear crusher or the like can be used. This impact shear crusher is a kind of hammer mill type crusher, and the paper layer and the vinyl chloride layer are separated and crushed by the shearing impact on the wallpaper sandwiched between the rotating hammer and the fixed grid. The moisture absorbed by the paper components
It causes foaming during molding and generation of wood acid. To prevent this, the moisture of the paper component is dehydrated in the heating stage. However, at the time of heating and mixing, the vinyl chloride component may melt and cover the fibers of the paper to prevent dehydration. In this regard, when the wallpaper is treated with the above-described impact shearing crusher, the paper component peels off into a floc and increases the surface area, and dehydration during heating and mixing is promoted. Processing is more preferred.

The wood flour used in the present invention includes:
General natural woods such as toga, pine, cedar, hinoki and lauan may be used, and are used after being pulverized to an average particle size of 50 to 500 μm, preferably 100 to 200 μm. If the average particle size is less than 50 μm, the feeling of wood is insufficient. Average particle size 500
If it exceeds μm, it will hinder uniform mixing with other components,
This leads to a decrease in the physical properties of the obtained composite material. The water content of the wood flour is preferably 10% by weight or less. When the water content is 10% by weight or more, the dehydration treatment time becomes long, and accurate measurement of wood flour cannot be performed. Wood flour is not limited to the above-mentioned wood, but can be used after being crushed and sized from other types of wood or construction waste. The crusher used for crushing wood differs in each of coarse crushing, medium crushing, and fine crushing, but a roll mill, an impact mill or the like is generally used.

The vinyl chloride resin used in the present invention may be a virgin resin, but it is more preferable to use a waste vinyl chloride product from the viewpoint of recycling. Since a vinyl chloride product contains a stabilizer, a lubricant, a processability improver, an impact improver, and the like necessary for the molding process, it can be effectively used for improving the moldability and physical properties of the woody composite material. In addition to the discarded vinyl chloride products described above, a raw material compound for molding vinyl chloride resin that is unnecessary and discarded can also be used.

The waste vinyl chloride product is a rigid sheet, film, bottle, case, or the like, and preferably a transparent or opaque white type is suitable. If you use opaque and dark PVC products, the final molded product will be different from the color of natural wood,
In some cases, a large amount of pigment is required for the complementary color. Also, plasticizers are compounded in waste soft vinyl chloride products,
If used in a large amount, the rigidity of the molded product may be reduced and the practical strength may be insufficient.

These vinyl chloride products are preferably crushed to a size of 10 mm or less in order to uniformly heat-mix them with other components. For the crushing of the waste vinyl chloride product, the same general-purpose cutter-type crusher as in the case of the vinyl chloride wallpaper can be used.

The mixing ratio of the crushed vinyl chloride wallpaper, wood flour and vinyl chloride resin is 10 to 90% by weight of the wallpaper, 5 to 65% by weight of the wood flour, and 65% by weight of the vinyl chloride resin.
Below, furthermore, wallpaper 35-90% by weight, wood flour 5-65% by weight, vinyl chloride resin 60% by weight or less, especially wallpaper 40
It is preferable to mix at a ratio of 80% by weight, wood powder 10１０〜50% by weight, and vinyl chloride resin 10１０〜50% by weight.
By adding wood flour to vinyl chloride wallpaper, the flexural modulus,
Although the bending strength and the woody feel are improved, if the wood flour exceeds 65% by weight, the ratio of the vinyl chloride component decreases, and the resin component and the paper, wood flour, filler, etc. are sufficiently melt-kneaded during extrusion molding. Molding may not be possible. Further, when a vinyl chloride resin is added to the vinyl chloride wallpaper, the moldability is improved. However, when the vinyl chloride resin exceeds 65% by weight, the woodiness and surface properties of the molded article may be impaired.

The ratio of the vinyl chloride wallpaper is 10% by weight.
Even if less, a good molded product can be obtained by mixing the wood flour and the vinyl chloride resin in an appropriate ratio, but in the present invention for the purpose of recycling vinyl chloride wallpaper, the amount of vinyl chloride wallpaper used is small. It is preferable that the vinyl chloride wallpaper is mixed in the composition so as to be at least 10% by weight, more preferably at least 35% by weight, since the recycling efficiency is reduced at least.

The processability improver used in the present invention is preferably a (meth) acrylate-based polymer, more preferably 50 to 95% by weight of methyl methacrylate, and a mixture of methacrylate and acrylate except methyl methacrylate. At least one or more selected monomers 5 to 5
0% by weight and other vinyl monomers copolymerizable therewith.
Copolymers consisting of up to 20% by weight are preferred.

The resin composition obtained by mixing wood flour or vinyl chloride resin in the above range with vinyl chloride wallpaper is wood flour, paper, filler,
Because it contains a large amount of inorganic pigments, the kneadability with the resin component serving as the matrix, the compatibility is insufficient, and the bending strength required as a synthetic composite material, the mechanical strength such as bending elastic modulus does not appear,
Depending on the application, there may be a case where the practical strength is insufficient. Further, there is a case where an optimum resin pressure required for molding is not applied from the extrusion molding die to the sizing die, resulting in poor shapeability of the molded product.

In order to improve such extrusion processability, a processability improver is added to 100 parts by weight of the above mixed resin composition.
By using 0 parts by weight, preferably 2 to 5 parts by weight, kneadability and compatibility at the time of extrusion molding are improved, and viscosity and ductility of the molten resin at the time of introduction into a sizing die are optimized. The shape can be improved. If less than 1 part by weight, no improvement effect can be expected. If the amount exceeds 10 parts by weight, the melting torque at the time of extrusion molding is increased, and the extruder may be thermally decomposed due to overload of the screw motor and heat generated by the molten resin. The workability improvers may be used alone or in combination of two or more. Further, a synergistic effect is expected when one or more of the lubricants are used in combination.

The lubricant used in the present invention is preferably polyethylene wax, and particularly preferably has a molecular weight of 2,000 to 40.
A polyethylene wax having a melting point of 100 to 120 ° C. and an acid value of 1 to 2 is preferred. The resin composition obtained by mixing wood flour or vinyl chloride resin in the above range with vinyl chloride wallpaper contains a large amount of wood flour, paper, fillers, and inorganic pigments. Insufficient lubricity may cause uneven fluidity due to partial stagnation and rough surface of the molded product. In order to improve such insufficient lubrication, a lubricant is added to 100 parts by weight of the mixed resin composition.
By using 5 to 5 parts by weight, preferably 0.5 to 3 parts by weight, it is possible to stabilize the fluidity during extrusion molding and to improve the surface properties of the molded product. If it is less than 0.2 parts by weight, no improvement effect can be expected. Exceeding 5 parts by weight may result in excessive lubrication, making it impossible to carry the molten resin from the extruder screw. The lubricant may be used alone or in combination of two or more. Further, when one or more of the processability improvers are used in combination, a further synergistic effect is expected.

By adding an appropriate amount of the following compounding agents in addition to the above-mentioned compounding composition, the processability during molding and the physical properties of molded articles are further improved. (1) Metal soaps such as tribasic lead sulfate, dibasic lead phosphate, lead stearate, barium stearate, barium-zinc, calcium-zinc, carboxylate and malate of methyl group, butyl group or octyl group, Or a known heat stabilizer such as a mercapto-based organotin compound. (2) Known fillers such as calcium carbonate, clay, silicic anhydride, calcium hydroxide, calcium silicate, aluminum hydroxide and the like. (3) Known impact modifiers such as acrylonitrile-butadiene-styrene copolymer, methyl methacrylate-butadiene-styrene copolymer, and chlorinated polyethylene. (4) dibutyl phthalate, dihexyl phthalate, di-2-ethylhexyl phthalate, phosphate ester type,
A known plasticizer such as an epoxy type. (5) Known lubricants such as liquid paraffin, paraffin wax, stearic acid, calcium stearate, glycerin monostearate, and hydrogenated castor oil. (6) Known pigments such as titanium dioxide, carbon black, ultramarine, quinacridone, perylene, and polyazo condensation pigments.

By mixing wood flour, vinyl chloride resin, a workability improver, and a lubricant within the above-mentioned range with vinyl chloride wallpaper, interior materials such as handrails for houses, baseboards, decks, It can be efficiently reused as a wood composite molded article expected to be used widely for exterior materials such as fences and floors and furniture materials.

Heat mixing of the above-mentioned vinyl chloride wallpaper, wood flour, vinyl chloride resin, processability improver, lubricant, etc.
A jacket that can be heated by steam, a high-speed mixer equipped with a rotating blade that generates shearing force due to stirring, and the like can be used. It is preferable to provide a duct for forcibly exhausting fine powder and volatile components from the exhaust port of the mixer lid. The mixture stirred by a high-speed mixer or the like is cooled by a ribbon-type mixer or the like having a water-cooled jacket to obtain a granular resin composition.

The heating temperature is preferably in the range of 200 to 215 ° C. When discharged at a temperature lower than 200 ° C., the kneading and melting are incomplete, the granules are not formed, and the plasticizer, which is a component of the wallpaper, does not dry up. Therefore, the powder becomes a moist powder having a bulk specific gravity of 0.5 or less. This can lead to poor penetration of resin during extrusion molding and hopper bridges. Discharge at a temperature higher than 215 ° C. is not preferable because it causes thermal decomposition of the vinyl chloride resin, generation of wood vinegar from wood flour, and generation of enlarged coarse particles. In this resin composition, since an enlarged coarse-grained substance formed by partially heat-melting is generated, it is preferable that the resin composition is sieved to a size of 10 mm or less by a vibrating sieve.

Further, the granular resin composition obtained as described above can be extruded as it is,
In order to prevent blocking and dust in the hopper during extrusion and to prevent moisture absorption during storage, the extruder is used to form pellets with a resin temperature of 170 to 180 ° C and a diameter of 5 mm or less and a length of about 10 mm or less. It is preferable to use it after grain processing. Next, a molded article of a woody composite material can be obtained by extruding the granular or pelletized resin composition.

The extruder is a general single-screw, same-screw biaxial,
A different direction twin screw extruder or the like is used. The molten resin discharged from the extrusion die is guided to a sizing die fitted and connected to the extrusion die, molded and cooled, and is taken out at a constant speed by a conveyor type take-up machine to obtain a molded product of a woody composite material. By polishing the surface of the obtained molded article with sandpaper,
The wood fibers are exposed on the surface and a woody feeling is obtained.

[0033]

The present invention will be described below in more detail with reference to examples and comparative examples. (Examples 1 to 12) A prescribed amount of each of the blended compositions shown in Table 1 was measured so that the total weight was 25 kg. The wallpaper used in this example is scraps from the manufacturing process. The wallpaper was previously crushed to a size of 10 mm or less using a WALD-15 hammer mill impact crusher manufactured by Onoe Kikai. As the wood flour, "Cellulosin No. 100" (Tsuga material) manufactured by Casino Co., Ltd. was used. The vinyl chloride resin used in this example was obtained by crushing a waste hard vinyl chloride bottle into a size of 10 mm or less using a rotary blade cutting type pulverizer type 1 manufactured by Sanriki Seisakusho. "Kaneace PA-20" manufactured by Kanegafuchi Chemical Industry Co., Ltd. was used as the processability improver. As a lubricant, "High Wax 220MP" manufactured by Mitsui Chemicals, Inc. was used.

Then, using a 100 L super mixer manufactured by Kawada Seisakusho, the jacket temperature was heated to 120 ° C. or higher with steam, and a predetermined amount of each composition was charged. The rotating blade was stirred and mixed at 900 rpm until the temperature of the mixed composition was raised to 210 ° C. while the water was forcibly discharged out of the system. The required time is 40 ~
It took 50 minutes. Next, the mixture was discharged into a 200 L ribbon mixer manufactured by Kawada Seisakusho and cooled to 65 ° C. to obtain a granular resin composition. If the cooling temperature is higher than 65 ° C., it may cause blocking of the powder. In the obtained granular composition, enlarged coarse particles produced by partially hot-melting are generated, which causes poor screw penetration in the next extrusion process, so that the vibrating sieve is 10 mm or less. And sieved to a size of.

Next, a molded product was obtained with an extruder using the granular resin composition obtained as described above. In this example, a 45 mm single screw extruder manufactured by Tahara Seisakusho (L / D = 25,
C · R = 1.7) was used. A breaker plate was installed between the screw tip of the extruder and the die to remove foreign materials mixed in the waste wallpaper, waste rigid PVC bottles, etc. used as raw materials. Two 80 mesh stainless steel screens were attached to the breaker plate. The sizing die was fitted and connected to the die of the extruder. The sizing die was cooled in the water bath. As the sizing die, a flat plate having a molded product outlet having a width of 32 mm and a thickness of 3 mm was used. The molding temperature was set at 165 ° C. for cylinder 1, 175 ° C. for cylinder 2, 180 ° C. for cylinder 3, 160 ° C. for the adapter, and 145 ° C. for the die. The rotation speed of the motor was set at 10 rpm, and the take-up speed of the molded product was set at 20 m / H.

The flexural strength and flexural modulus of the molded product are determined by JI
It was measured by cutting to a predetermined size according to SK7203. The motor load of the screw during the extrusion was read from an ampere meter. The wooden texture was visually evaluated by polishing the surface of the molded article with sandpaper. The surface property was evaluated by visually observing the gloss and smoothness of the surface of the molded article, and the formability was visually evaluated by the degree of sink marks at four corners of the molded article. Tables 1 and 2 show the composition of the 12 examples and the results of quality evaluation of the molded articles.

The composition (weight ratio) of the wallpaper used in this example was about 20% for the paper layer as the base material and about 80% for the vinyl chloride layer. The vinyl chloride layer is about 38% of vinyl chloride resin, the filler is about 34% of calcium carbonate, the plasticizer is about 20% of DOP, the pigment is about 5% of titanium dioxide, and the heat stabilizer is Ba-Zn metal soap. About 2%, and about 1%.

The filler improves the dimensional stability of the molded article,
The plasticizer has the effect of lowering the coefficient of linear expansion, the plasticizer improves fluidity during molding, the titanium dioxide improves weather resistance, the hiding of the color of molded products, and the thermal stabilizer thermally decomposes vinyl chloride resin and wood powder. It is effectively used to prevent the generation of wood acid from paper components. The paper component of the base material is a cellulose fiber, which can be effectively used as a substitute for wood flour, thus making it possible to reduce raw material costs.

In Examples 1 to 6, the amounts of the wallpaper, hard PVC and wood flour were changed by using a fixed amount of the processability improver and the lubricant. In Example 1, the bending strength and bending elasticity are inferior to those of the other examples. However, when formed into a hollow shape, the strength is reinforced, the quality required for a woody composite material for building is secured, and the woody feeling is satisfactory. A molded product was obtained.
Further, in Example 2, the ratio of the wood flour and the hard vinyl chloride bottle was higher than in Example 1. As a result, bending strength, bending elasticity, and hardness were improved. In Example 3, as a result of further increasing the ratio of the wood powder and the rigid polyvinyl chloride bottle, the bending strength and the bending elastic modulus were further improved. However, the motor load during molding tended to be higher than the other examples. Example 4 is a two-component blend of wallpaper and wood flour, but by adding more wood flour than in Example 1, the flexural strength and flexural modulus are improved.

In Example 5, the proportion of the hard vinyl chloride bottle was increased and the proportion of the wood flour was decreased. However, since the amount of the PVC component was large, the moldability was improved and the bending strength and the flexural modulus were satisfied. Could be done. Further, Example 6
When the wallpaper was 20% by weight, the reuse rate of the wallpaper was low, but the bending strength and the flexural modulus were the best among Examples 1 to 6.

[0041]

[Table 1]

In Examples 7 to 12, the amounts of the wallpaper, hard vinyl chloride and wood flour were the same as in Example 2, and the amounts of the processability improver and the lubricant were changed. Examples 7 to 9
Changed the amount of the processability improver. As a result, by increasing the amount used, the bending strength, the flexural modulus, and the shapeability are improved. In Examples 10 and 11, the amount of the lubricant was changed. As a result, the motor load was reduced and the surface properties were improved by increasing the usage. In Example 12, a combination of a workability improver and a lubricant was used in the largest amount among the examples, but the bending strength, the flexural modulus, the motor load, the surface property, and the shapeability were well balanced. Quality was obtained.

[0043]

[Table 2]

(Comparative Examples 1 to 8) Molded articles were obtained and evaluated in the same manner as in the examples except that the composition of the raw materials was changed as shown in Table 3. Table 3 shows the results.

[0045]

[Table 3]

In Comparative Example 1, a granular resin composition obtained by heating and mixing a wallpaper alone with a mixer in the same manner as in the Example was extruded, but the flexural strength, flexural elasticity, and woodiness were inferior. A material satisfying the quality required for a woody composite material could not be obtained. In Comparative Example 2, the granular resin composition obtained by heating and mixing the wallpaper and the wood flour was extruded, but could not be molded. This is because the ratio of the wallpaper was small and the resin component serving as a matrix that kneaded and melted with wood flour was insufficient, and kneading was insufficient.

In Comparative Example 3, a granular resin composition obtained by heating and mixing wallpaper and hard vinyl chloride was extruded, and satisfactory bending strength and bending elasticity were obtained. However, the ratio of the wallpaper was small and the cellulose fibers were insufficient, and a good woody texture was not obtained.

In Comparative Examples 4 to 8, the same amount of wallpaper, hard vinyl chloride, and wood flour as in Examples 7 to 12 was used, and a granular resin composition in which the amounts of the processability improver and the lubricant were changed was extruded. Things. In Comparative Example 4, no processability improver or lubricant was used. In Comparative Examples 5 and 6, only 0.5 and 15 parts by weight of the processability improver alone were used. In Comparative Examples 7 and 8, only 0.1 and 7 parts by weight of the lubricant alone were used. As a result, as shown in Table 3, in Comparative Examples 4 to 7, satisfactory bending strength and bending elastic modulus were obtained, but the surface properties and shapeability of the molded product were insufficient, and the quality required as a woody composite material was not satisfied. Could not be obtained. In Comparative Example 8, molding was impossible due to excessive lubrication during extrusion molding.

[0049]

According to the present invention, the composition of wood powder, vinyl chloride resin, processability improver and lubricant is optimized for the crushed vinyl chloride wallpaper, and the mixture is heated and mixed to convert the wallpaper into a paper layer and a vinyl chloride layer. By effectively utilizing all of the wallpaper components without separation, it is possible to provide an inexpensive woody composite molded article material having practical strength and having an excellent appearance and a good feel with a rich woody feel.

──────────────────────────────────────────────────続 き Continued on the front page (51) Int.Cl. ⁷ Identification symbol FI Theme coat ゛ (Reference) C08J 3/12 CEV C08J 3/12 CEVZ 4J002 5/00 5/00 C08L 33/04 C08L 33/04 91 / 06 91/06 97/02 97/02 // B29K 1:00 B29K 1:00 27:06 27:06 105: 26 105: 26 B29L 31:10 B29L 31:10 F term (reference) 2B260 AA11 BA04 BA15 BA18 BA26 CA02 CB01 CD02 CD10 DA07 DA08 DA09 DA18 DC20 DD03 EA13 4F070 AA22 AC75 AC78 AC94 AC96 AE03 AE04 AE09 DA05 DA55 4F071 AA15 AA24 AA33 AA73 AE11 AE22 AG26 AH03 BA01 BB06 4F207 AA01 AA01 AA01 AA15 AA01 AA01 AA01 AA01 AA01 AA01 AA01 AA15 AA01 AA01 AA01 AA01 AA01 AA01 AA01 AA01 AA01 AA01 AA01 AA15 AA17 BG50 4J002 AE035 AH00X AH00Y BB035 BD04W BD04X BG064 FD060 FD090 GL00

Claims (6)

[Claims] 1. 100 parts by weight of a mixed composition containing 10 to 90% by weight of crushed vinyl chloride wallpaper, 5 to 65% by weight of wood flour, and 65% by weight or less of vinyl chloride resin.
A resin composition obtained by heating and mixing 10 to 10 parts by weight of a processability improver and / or 0.2 to 5 parts by weight of a lubricant. 2. The resin composition according to claim 1, wherein the processability improver is a (meth) acrylate polymer. 3. The resin composition according to claim 1, wherein said lubricant is polyethylene wax. 4. A granular resin composition for a woody composite material, wherein the resin composition according to claim 1 is sized to a size of 10 mm or less. 5. A pellet-shaped resin composition obtained by granulating the granular resin composition according to claim 4 to a diameter of 5 mm or less and a length of 10 mm or less. 6. A wooden composite molded article obtained by extrusion molding using the resin composition according to claim 1.