JP2001353707A - Wood-like molded product - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a wood-like molded product which is good in recycling rate of lumber being residential destruction rubbish. SOLUTION: Wood fine particle (wood powder) of 30-65 wt% obtained by pulverizing wood being residential destruction rubbish and 20-45 wt.% of resin powder obtained by pulverizing polypropylene packaging component used for food packaging and the like are mixed, extruded at 180-200 deg.C, and wood-like molded product is molded. In this case, calcium carbonate being a shape stabilizer of the wood-like molded product is not added, and the calcium carbonate previously added into the polypropylene packaging component is used. After sanding a surface of the wood-like molded product by sand paper, coating processing is applied to the surface.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a wood-like molded product used for the interior of vehicles and the interior and exterior of buildings.

[0002]

BACKGROUND ART Conventionally, for example, Japanese Patent Application Laid-Open No. H11-12992
As disclosed in Japanese Patent No. 23, there is known a technique for producing a wood-like molded article from a pulverized cellulose material and a resin. That is, in this technique, a wood-like molded article having a desired shape such as a plate or a rod is manufactured by mixing a cellulose powder, a resin, a pigment, and the like, and extruding or injection molding the mixed material. And as the cellulose material and resin which are the raw materials of this wood-like molded article, from the viewpoint of resource reuse, the recovered wood member and the recovered resin member obtained by separating from the scraps and waste materials of the collected building members are used. And are used.

[0003]

However, the recovered resin member recovered from the building member is made of a mixture of various resins such as vinyl chloride resin, foamed vinyl chloride resin, polyethylene resin, polypropylene resin and polyurethane resin. When a wood-like molded article is manufactured using such a recovered resin member, a large amount of cellulose material particles (recovered wood member) cannot be contained. Therefore, since a large amount of waste materials cannot be reused at one time, the recycling rate is stagnant. In addition, in the process of manufacturing a wood-like molded product, calcium carbonate and pigments for preventing expansion and shrinkage due to a change in temperature of the resin, etc., must be added according to the properties and color of the recovered resin member. There is also a problem.

[0004] It is an object of the present invention to provide a wood-like molded article having a good recycling rate of wood as house waste.

[0005]

Means for Solving the Problems In order to solve the above problems, the invention according to claim 1 is a wood-like molded article used for the interior of a vehicle or the interior and exterior of a building, and the wood is a waste material of a house. It is characterized in that it is manufactured using wood powder obtained by pulverizing wood and resin powder obtained by pulverizing a resin packaging member used for food packaging and the like as raw materials.

Here, the resin packaging member is, for example, polypropylene (PP), polyethylene terephthalate (P)
ET), polystyrene (PS), polyvinyl chloride (P
V) and the like, including containers (including containers), trays, and the like, and also includes sheets.

According to the first aspect of the present invention, a wood-like molded article is formed by using wood powder obtained by pulverizing wood, which is house waste, and resin powder obtained by pulverizing a resin packaging member used for food packaging and the like. As a result, resources can be effectively used. In addition, since the resin packaging members having the same composition are often collected together, the properties and the like are easy to understand and easy to reuse. In addition, additives such as pigments contained in the resin packaging member can be effectively reused, and it is not necessary to add them again at the stage of manufacturing the woody molded article, or the amount of addition can be reduced. .

According to a second aspect of the present invention, in the wood-like molded product according to the first aspect, a polypropylene packaging member is used as the resin packaging member, and the wood flour is 30 to 65 wt%.
It is characterized by being included.

According to the second aspect of the present invention, a polypropylene packaging member is used as the resin packaging member for obtaining the resin powder,
By including 30 to 65 wt% of wood flour, it becomes possible to contain a large amount of wood flour in a woody-like molded product, so that it is possible to give a closer touch and texture to real wood and to use a smaller amount of wood. Since it increases, the recycling rate of house waste can be improved. In the case of wood-like molded products containing wood flour, if polypropylene is used as the main resin, a molded product having no practical problem can be obtained even if the wood flour is added up to 65 wt%.

[0010] The third aspect of the present invention is the first or second aspect.
In the wood-like molded article described above, a mixture obtained by kneading the wood flour and the resin powder from the polypropylene packaging member was used as
It is characterized by being extruded at 0 to 200 ° C.

According to the third aspect of the present invention, the wood powder and the resin powder from the polypropylene packaging member are heated at 180 to 200 ° C.
And extruded. Polypropylene is insufficiently softened at 180 ° C. or lower, does not mix evenly with wood flour, and is difficult to extrude. If the temperature is higher than 200 ° C., the wood powder is changed by heat. Therefore, formation can be suitably performed at 180 to 200 ° C.

According to a fourth aspect of the present invention, there is provided a wood-like molded product according to the first, second or third aspect, wherein after the extrusion,
It is characterized in that a sanding process is performed on the surface and a coating process is further performed.

According to the fourth aspect of the present invention, the amount of the wood powder exposed on the surface of the wood-like molded article can be increased by performing the sanding treatment after the extrusion, and the touch of the real wood can be further improved. Can be approached. In addition, by performing painting after the sanding process, it becomes possible to visually approximate real wood.

The invention according to claim 5 is the invention according to claims 1, 2, and 3
Alternatively, the wood-like molded article according to 4, wherein calcium carbonate previously contained in the resin packaging member is used as a shape stabilizer.

According to the fifth aspect of the present invention, calcium carbonate is added as a shape stabilizer at the time of molding the resin packaging member. Therefore, by using this calcium carbonate, carbonic acid is newly added as a shape stabilizer. It is possible to omit the addition of calcium or to reduce the amount of addition when adding new calcium carbonate.

[0016]

DESCRIPTION OF THE PREFERRED EMBODIMENTS Hereinafter, embodiments of the present invention will be described in detail. A wood-like molded product can be formed by mixing wood fine powder (wood flour) and resin powder, melting this mixed material and molding. Hereinafter, a method for producing a woody molding will be described.

First, an impeller mill (IMP-250;
By using mechanical shock crushing, wood, which is house waste material, is used to make a coarsely crushed wood having a particle size smaller than 150 mesh, preferably smaller than 120 mesh. Here, the wood of the house scraps includes wood scraps and sawdust that are generated during house building. Then, the coarsely pulverized wood material and zirconia-based and alumina-based ceramic balls having an outer diameter of 3 to 5 mm are loaded into a ball mill main body, and these are stirred by a rotor. The coarsely pulverized wood in contact with the ceramic balls to be stirred is pulverized to a finely pulverized material, and the surface thereof is polished to fine particles having a surface with very few cilia. At this time, the surface temperature of the ceramic balls is set in the range of 90 to 120 ° C., and the room temperature is set to 80 ° C. or less, and the drying of the coarsely ground material is performed simultaneously with the grinding.

That is, when the coarsely pulverized wood comes into contact with the surface of the ceramic ball, it is mechanically crushed and worn and ground and polished, and simultaneously heated and dried. Removed. In addition, when separated from the ceramic balls, the fibers are rapidly cooled, so that the fibers in the coarsely pulverized wood are subjected to expansion and contraction and are rapidly dried by being repeatedly heated and cooled. Is efficiently ground by the ceramic balls, and as a result, finely ground wood particles (wood flour) having an independent particle size with less cilia on the peripheral surface are obtained.

The fine wood particles thus obtained are classified and adjusted to a desired particle size, and the fine wood particles and a hard white pigment (surface particles) smaller in diameter than the fine wood particles are hardened. The particles are mixed in a ball mill, and the resulting mixed particles are dispersed in a gaseous phase while applying mechanical and thermal energy, mainly impact force, to the particles. To support wood pigment particles to obtain fine wood particles with surface particles.

Here, as the white pigment to be supported, titanium oxide, lithopone, white carbon and the like can be used. Titanium oxide is particularly thermally and chemically stable, and has a coloring power and a hiding power. Is also preferable since sufficient whiteness can be imparted to the obtained wood-like molded product. The particle size of the white inorganic pigment is adjusted to be sufficiently smaller than the wood fine particles, and specifically, about 0.1 μm is preferable. In addition, the amount of the white pigment to be supported is such that the upper limit is the amount that overlaps the peripheral surface of the fine wood particles serving as the base particles and covers the peripheral surface, and the lower limit depends on the desired hue of the woody molded article to be created. Decide appropriately.

A resin powder is mixed with the fine wood particles having surface particles obtained as described above to obtain a mixed material. Resin powder mixed with fine wood particles with surface particles is used for packaging of foods etc., collected trays, polypropylene packaging materials such as food containers, and polypropylene scraps generated when forming polypropylene packaging materials Is crushed.
The composition of the polypropylene packaging member is mainly 75% polypropylene, 20% talc, and 5% calcium carbonate.
Here, calcium carbonate is added to prevent expansion and contraction of the polypropylene packaging member due to a temperature change or the like and to stabilize the shape. The mixing ratio between the wood fine particles and the polypropylene packaging member powder is as follows:
t% (preferably 51 to 55 wt%), and
0 to 45 wt% (preferably 25 to 30 wt%). Here, if the amount of the fine wood particles is less than 30 wt%, it is insufficient to produce wood, and waste wood cannot be effectively reused. Further, since a wood-like molded product can be formed without any problem up to 65 wt%, it is appropriate to add the wood fine powder particles in an amount of 30 to 65 wt%. The addition amount of the resin powder is determined according to the addition amount of the wood fine powder. When the additive is added, the total amount of the wood fine powder, the resin powder, and the additive is 100 wt%. To be added.

This mixed material is once melted and extruded to form wood-like forming material pellets. Further, the wood-like forming material pellets are melted at 180 to 200 ° C. and extruded to form a wood-like molded product having an actually desired shape. A temperature of 180 ° C. or less is suitable for the extrusion forming temperature, since the softening of the polypropylene is insufficient at 180 ° C. or less, and the fine wood particles change at 200 ° C. or more.

Then, a surface treatment is performed on the wood-like molded product by sanding and painting. After the surface is polished with coarse sandpaper, the surface is polished with fine sandpaper. That is, the fine wood particles are exposed to the surface of the wood-like molded article with coarse sandpaper, and the surface of the wood-like molded article is smoothed with fine sandpaper. After this sanding treatment, the surface of the wood-like molded product is coated to form a wood-like molded product having a desired hue.

The mixing of the wood and the resin may be performed before the pulverization. That is, uncrushed wood and a polypropylene packaging member are mixed so that the wood becomes 30 to 65 wt% and the polypropylene packaging member becomes 20 to 45 wt%, and the mixture is made of wood like the above-described method. It is pulverized until it becomes fine powder and the polypropylene packaging member becomes powdery. Titanium oxide is mixed with the pulverized mixture and supported on fine wood particles, and then the mixture is melted to synthesize wood-like forming material pellets. The method of forming the wood-like molded article from the wood-like forming material pellets is the same as the method described above.

As described above, according to the above embodiment,
Since a wood-like molded product is manufactured using wood, which is house waste material, and a polypropylene packaging member used for food packaging and the like, resources can be reused. In addition, food packaging members often have the same composition and are collectively collected, and can be easily reused taking advantage of their properties. That is, since polypropylene can be consolidated even if it contains many wood fine particles (wood powder), the amount of wood fine particles (wood powder) in the wood-like molded product can be reduced to 30 to 65 watts by using the polypropylene packaging member.
t%. As a result, the feel and texture of the wood-like molded product can be made closer to real wood, a large amount of house waste can be used, and the wood recycling rate can be improved. In addition, in order to stabilize the shape of the packaging member, about 5% of calcium carbonate is added in advance to the polypropylene packaging member. No need to add. Also, since this calcium carbonate also plays a role as a white pigment,
The addition amount of titanium oxide, which is a white pigment, can be reduced. After extruding a wood-like molded product, sanding treatment removes the resin (polypropylene) on the surface, and the fine wood particles (wood flour) are exposed on the surface, so the texture is closer to real wood And it can be visually approximated to real wood by painting.

In the above embodiment, sandpaper is used for the sanding treatment. However, the present invention is not limited to this, as long as it can remove the resin on the surface of the wood-like molded product. Good, file, etc. may be used. Further, the method of crushing wood or resin, the crushing device, and the like are also arbitrary, and it goes without saying that the specific detailed structure and the like can be appropriately changed.

[0027]

According to the first aspect of the present invention, a wood-like molded product is manufactured using wood, which is house waste material, and a resin packaging member used for food packaging and the like, so that resources are effectively used. be able to. In addition, since resin packaging members are often collectively collected with the same composition, properties and the like are easy to understand and easy to reuse, and the additives contained in the resin packaging member must be effectively reused. Therefore, there is no need to add it again at the stage of producing a wood-like molded article.

According to the second aspect of the present invention, the wood powder contained in the wood-like molded article is increased by incorporating 30 to 65 wt% of the wood powder using the polypropylene packaging member.
As a result, the feel and texture of the wood-like molded article can be made closer to real wood, and the amount of house waste recycled can be increased.

According to the third aspect of the present invention, when the temperature is lower than 180 ° C., the softening of the polypropylene is insufficient, so that it is difficult to extrude and uniformly mix with the wood powder. Will change. Therefore, 1
By extruding at 80 to 200 ° C., a wood-like molded product can be suitably formed.

According to the fourth aspect of the present invention, the amount of wood powder exposed on the surface is increased by sanding the surface of the extruded wood-like molded article, thereby bringing the wood closer to the touch of real wood. Can be. In addition, by painting the surface after the sanding process, the wood can be made closer to real wood visually.

According to the fifth aspect of the present invention, by using the resin packaging member, calcium carbonate contained as a shape stabilizer in the resin packaging member can be used as a shape agent for a wood-like molded product. It is not necessary to newly add calcium carbonate, or the amount of calcium carbonate can be reduced.

Continued on the front page (51) Int.Cl. ⁷ Identification symbol FI Theme coat II (reference) C08J 5/00 CEP C08J 5/00 CEP 4J002 C08K 3/26 C08K 3/26 C08L 23/12 C08L 23/12 97/02 ZAB 97/02 ZAB 101/00 101/00 E04F 13/18 E04F 13/18 A // B29K 23:00 B29K 23:00 105: 16 105: 16 105: 26 105: 26 511: 14 511: 14 F term (Reference) 2B260 AA11 AA12 BA02 BA15 BA18 BA30 CB01 CD02 CD08 CD10 DA01 DA07 DA08 DA09 DA18 DC12 DD03 EA05 EA13 EC07 2E110 AA70 AB01 AB22 AB23 AB46 BA12 BB04 GA24W GA33W GA43W GB43W GB46W GB54W GB62W 4A04AAA ACB07 CB32 CC11 DA03 DA06 DA10 4F071 AA09 AA15 AA20 AA22 AA24 AA46 AB21 AH03 BB06 BC03 BC07 4F207 AA11 AA50 AC04 AD06 AH26 AH48 KA01 KA17 KF01 KJ05 KK11 KK41 KK90 KW50 4J002 BB03X03 DG03

Claims (5)

[Claims] Claims 1. A wood-like molded article used for the interior of a vehicle or the interior and exterior of a building, the wood powder obtained by pulverizing wood which is a waste material of a house, and the resin packaging used for food packaging and the like. A wood-like molded product characterized by being manufactured using a resin powder obtained by crushing a member and: 2. A wood-like molded product according to claim 1, wherein a polypropylene packaging member is used as said resin packaging member, and said wood flour is contained in an amount of 30 to 65 wt%. 3. The wood-like molded product according to claim 1, wherein the wood powder and the resin powder from the polypropylene packaging member are kneaded and extruded at 180 to 200 ° C. Wood-like molded products. 4. The wood-like molded product according to claim 1, wherein after the extrusion forming, a surface is subjected to a sanding treatment and further subjected to a coating treatment. . 5. The wood-like molded article according to claim 1, wherein calcium carbonate previously contained in a resin packaging member is used as a shape stabilizer.