JP2001226492A - Resin molded product - Google Patents

Abstract

PROBLEM TO BE SOLVED: To obtain a resin molded product enabling waste byproducts produced in the local industry to be utilized (recycled) and having effect of such waste byproducts as an extender. SOLUTION: This resin molded product is obtained by compounding a resin molding compound with 1-30 wt.%, based on the whole resin molding compound, of a ground product <=2 mm in average granular size made by grinding at least one kind of waste byproduct selected from tea leaves, citrus peel, peanut shell, waste cocoons, mushroom, dried gourd shavings, soybeans, devil's tongue, striped bamboo, diatomaceous earth, beer strained lees, juice strained lees, scallop shell and oyster shell.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a resin molded product which effectively utilizes waste by-products generated in the local industry.

[0002]

2. Description of the Related Art In recent years, resin molded products made from materials such as styrofoam food trays, plastic parts such as home appliances, PET bottles, etc., which have been produced after the production process or consumption, and materials which do not adversely affect the natural environment. Many products (eco-products and recycled products) are on the market. In recent years, social agreement has been formed on the aim of building a resource-recycling society, and more and more companies are aiming for so-called zero-emissions that do not generate any waste in order to realize this.

[0003] On the other hand, various products exist as local industries in each prefecture in Japan. In the manufacturing and processing steps, by-products discarded, such as scallop shells in Hokkaido and Aomori Prefecture, and Chiba Prefecture There are many waste by-products such as peanut shells, tea leaves in Shizuoka prefecture, oyster shells in Hiroshima and Miyagi prefectures, and citrus peels such as mandarin oranges in Ehime and Wakayama prefectures.

[0004] However, it is a fact that it is difficult to dispose of waste by-products generated in these local industries, and at present it has not been used effectively.

[0005]

SUMMARY OF THE INVENTION The present invention is to solve the above-mentioned conventional problems and the present situation, and to provide a resin molded product which effectively utilizes waste by-products generated in the local industry. With the goal.

[0006]

Means for Solving the Problems In view of the above-mentioned conventional problems and the like, the present inventors have conducted intensive studies and as a result, crushed waste by-products generated in the local industry, and converted the crushed material having a specific particle size into resin. By blending in a specific range with respect to the total amount of the molding material, it has been found that the resin molded article of the above purpose can be obtained,
The present invention has been completed. That is, the resin molded product of the present invention includes the following items 1 to 4. 1. It is selected from tea leaves, citrus peels, peanut shells, cocoons, mushrooms, dried gourds, soybeans, konjac, kumasasa, diatomaceous earth, beer pomace, juice pomace, scallop shells and oyster shells, which are waste by-products. A resin molded product characterized by comprising 1 to 30% by weight, based on the total amount of the resin molding material, of a pulverized product obtained by pulverizing at least one kind having an average particle diameter of 2 mm or less. 2. 2. The resin molded article according to the above 1, wherein the water content of the pulverized product is 0.5% or less. 3. The above 1 wherein the resin of the resin molding material is a biodegradable resin.
Or the resin molded product according to 2. 4. The above 1 to 3, wherein the resin molded product is writing implements or stationery.
The resin molded product according to any one of the above.

[0007]

Embodiments of the present invention will be described below in detail. The resin molded product of the present invention is obtained by mixing 1 to 30% by weight, based on the total amount of the resin molding material, of a crushed product having an average particle size of 2 mm or less obtained by crushing at least one selected from waste by-products generated in the local industry. It is characterized by the following.

The waste by-products generated in the local industry used in the present invention include, for example, tea leaves (Shizuoka Prefecture), tangerines,
Citrus peels such as Iyokan and Hassaku (Ehime Prefecture, Wakayama Prefecture),
Peanut shell (Chiba Prefecture), waste cocoon (Gunma Prefecture), mushroom (Gunma Prefecture), dry gourd (Tochigi Prefecture), soybean (Ibaraki Prefecture), konjac (Gunma Prefecture), Kumasa (Nagano Prefecture), diatomaceous earth (Ishikawa Prefecture) , Beer pomace, juice pomace, scallop shells (Hokkaido, Aomori Prefecture) and oyster shells (Hiroshima Prefecture, Miyagi Prefecture) at least one selected from one or a combination of two or more
Is mentioned. In order to treat these waste by-products as a resin molded product, it is necessary that the waste by-products have an average particle size of 2 mm or less using a crusher or the like, and preferably have an average particle size of 0.1 to 0 mm. 0.5 mm is desirable. If the average particle size of these waste by-products exceeds 2 mm, moldability becomes difficult or a desired resin molded product cannot be obtained, which is not preferable.

[0009] The water content of the waste by-product is 0.1%.
5% or less, preferably 0.1% or less is desirable. If the waste by-product with a moisture content of more than 0.5% is blended into the molding resin material and processed, the molded product will have bubbles or lose its surface gloss, and the action of water will break the molecules during heating. This causes the mechanical strength to decrease, resulting in an unstable molded product, which is not preferable.

As the resin molding material used in the present invention, for example, polyethylene (PE), polypropylene (P
P), ABS resin, polystyrene (PS), polyethylene terephthalate (PET), polycarbonate resin,
Resins such as acrylic resin and polyacetal resin, thermoplastic elastomers (olefin-based thermoplastic elastomers, polyester-based thermoplastic elastomers, styrene-based thermoplastic elastomers, etc.), and resins obtained by recycling (recycling) these resins (eg, recycled PET) , Playback PS,
Recycled PP, etc.), biodegradable resins, synthetic rubbers such as isoprene rubber, butadiene rubber, natural rubbers, and coloring agents, plasticizers, stabilizers, antioxidants, and ultraviolet absorbers usually blended with these resins and the like. , Antistatic agent, flame retardant, foaming agent,
Lubricants, anti-aging agents, inorganic fillers (calcium carbonate, magnesium carbonate, magnesium silicate, zinc oxide, etc.) and the like can be used. These resins and the like can be used in an appropriate combination depending on the use of the resin molded article. it can.

The biodegradable resin of the resin molding material used in the present invention is biodegraded in a natural environment where many microorganisms (bacteria, molds, etc.) are present, for example, in soil, fresh water or sea water. It is not particularly limited as long as it is a completely degradable biodegradable resin or a partially degradable (disintegrable) biodegradable resin that eventually becomes carbon dioxide gas and water. For example, starch-based biodegradable resins, Cellulose-based biodegradable resins, lactic acid-based biodegradable resins, aliphatic polyester-based biodegradable resins, and aromatic and aliphatic copolymer types (based on terephthalic acid, 1,4-butanediol, and adipic acid) ), Biodegradable resins produced by microorganisms, and biodegradable resins based on chitosan / cellulose. Specifically, as a lactic acid-based biodegradable resin, "Lacia" manufactured by Mitsui Chemicals and "Lacti" manufactured by Shimadzu Corporation
Examples of the aliphatic polyester-based biodegradable resin include “Bionole 1000 series, 3000 series” (polybutylene succinate,
Polybutylene succinate / adipate) and the like. Cellulose-based biodegradable resins include Daicel Chemical's "Cell Green" and Nippon Shokubai's "Lunare". Include Nippon Synthetic Chemical Company's `` Matterby '', Nippon Shokuhin Kako Co., Ltd.'s `` Placorn '' and Nippon Cornstarch's `` Evercorn ''. And the like. Examples of the chitosan / cellulosic biodegradable resin include “Drone” manufactured by Aicello Chemical Co., Ltd. In the resin molded article composed of these biodegradable resins and the above-mentioned waste by-products, the waste by-products are natural wastes. Goods will be provided.

The compounding amount of the waste by-product is 1 to 30% by weight, preferably 5 to 20% by weight based on the total amount of the resin molding material.
% By weight. If the amount of the waste by-product is less than 1% by weight, the state of the mixture is difficult to understand, and the intended waste is not effectively used. If the amount exceeds 30% by weight, the surface condition of the molded article is poor. In addition, the mechanical strength decreases, which is not preferable.

[0013] The resin molded article of the present invention is obtained by pulverizing at least one kind selected from the above-mentioned waste by-products and having a mean particle size of 2 mm or less and the above-mentioned resin molding material in a usual resin molding method, for example, injection molding, It can be manufactured by processing by extrusion molding, foam molding and the like. The form (structure, shape), use, and the like of the resin molded product of the present invention are not particularly limited as long as the resin molded product is used as a normal resin molded product. The form of the resin molded product is, for example, applicable to a molded film, a molded sheet, a molded product, and the like. The application of the resin molded product is, for example, a pencil, a ballpoint pen, a water-based pen for writing instruments. , Oil-based pens, shafts such as marker pens, center shafts, resin molded products such as caps, stationery,
The present invention can be applied to a correction tape main body case, a lead replacement case such as a mechanical pencil, a liquid glue, a solid glue container, an underlay, a pencil case, and other resin molded products.

In the resin molded article of the present invention thus constituted, a pulverized product having an average particle size of 2 mm or less obtained by pulverizing at least one selected from the various waste by-products generated in the local industry is reduced to the total amount of the resin molding material. On the other hand, it is characterized by being blended in an amount of 1 to 30% by weight, whereby waste by-products generated in the local industry can be effectively used (recycled), and the waste by-products have an effect as a bulking material. A resin molded product will be provided.

[0015]

EXAMPLES Next, the present invention will be described more specifically with reference to examples and comparative examples, but the present invention is not limited to the following examples.

Example 1 A ground tea leaf having an average particle size of 0.5 mm or less was obtained by using a grinder (manufactured by Hosokawa Micron, the same applies hereinafter) to a tea leaf (produced by Shizuoka Prefecture), which is a waste by-product generated after tea leaf production. (Water content 0.1% or less).
20% by weight of this ground tea leaf and an aliphatic polyester-based biodegradable resin (Bionole # 1020, manufactured by Showa Polymer Co., Ltd.)
80% by weight, using a biodegradable resin molding machine (manufactured by Nissei Plastics Co., Ltd.), a pencil lead replacement case (8 × 1
5 × 65 mm) and its lid.

Example 2 A mandarin peel (manufactured by Mie Prefecture), which is a waste by-product generated after the production of canned Mandarin oranges, was pulverized with an average particle size of 0.5 mm or less by a pulverizer (moisture content: 0.1%). 1% or less). 10% by weight of this ground orange peel and 90% by weight of an aliphatic polyester-based biodegradable resin (Bionole # 1020, manufactured by Showa Polymer Co., Ltd.)
In the same manner as in Example 1 above, a refill lead case and a lid for a mechanical pencil were produced.

Example 3 A ground peanut hull (having a water content of 0.1) having an average particle size of 0.5 mm or less was obtained by a pulverizer using a groundnut husk (produced in Chiba Prefecture) which is a waste by-product produced after the production of peanut. %). 10% by weight of this peanut shell
And an aliphatic polyester biodegradable resin (Bionole #
1020, manufactured by Showa Polymer Co., Ltd.), and a refill case and a lid for a mechanical pencil were produced in the same manner as in Example 1 above.

[Examples 4 to 6] In Examples 1 to 3, the aliphatic polyester-based biodegradable resin (Bionole #
1020, manufactured by Showa Polymer Co., Ltd.) was replaced with a lactic acid-based biodegradable resin (Lacia, manufactured by Mitsui Chemicals, Inc.), and the compounding amount was 80, respectively.
% By weight, and crushed tea leaves, crushed mandarin peels, and ground peanut hulls (waste contents of Examples 1 to
(The same as in Example 3) with a blending amount of 20% by weight, respectively, to prepare a refill lead case and a lid for a mechanical pencil in the same manner as in Examples 1 to 3 above.

Examples 7 to 9 In Examples 1 to 3, the aliphatic polyester-based biodegradable resin (Bionole #
1020, manufactured by Showa Polymer Co., Ltd.) was replaced with a lactic acid-based biodegradable resin (Lacty, manufactured by Shimadzu Corporation), and the amount of each was 2
0% by weight, and waste by-products such as crushed tea leaves, crushed mandarin skin, and ground peanuts (the moisture content is the same as in Example 1 above).
The same as in Examples 1 to 3 above, except that the blending amount of each of the same was set to 80% by weight, and a refillable case for a mechanical pencil and a lid were produced.

Example 10 Scallop shell (Aomori Prefecture), which is a waste by-product, was obtained using a crusher to obtain a scallop crushed product (water content 0.1% or less) having an average particle size of 0.5 mm or less. . 20% by weight of the crushed scallop shell and 80 parts of a polypropylene resin ("J728" manufactured by Grand Polymer Co., Ltd.)
And a tray (size: 160 × 100 × 10 mm) using an injection molding machine (manufactured by Nissei Plastics, the same applies hereinafter) using the
Was prepared.

Example 11 A mandarin peel (manufactured by Mie Prefecture), which is a waste by-product produced after the production of canned Mandarin oranges, was crushed with an average particle size of 0.5 mm or less using a crusher (moisture content: 0,1). 1% or less). Using 20% by weight of the ground orange peel and 80% by weight of polyethylene resin (manufactured by Nippon Polychem Co., Ltd., "MK568A"), a replacement lead case and a lid for a mechanical pencil are produced in the same manner as in Example 1 above. did.

Example 12 A ground tea leaf (having a water content of 0.1% or less) having a mean particle size of 0.5 mm or less was obtained by using a grinder of tea leaves (produced in Shizuoka Prefecture) as waste by-products. Using a 20% by weight of the ground tea leaves and 80% by weight of a polystyrene resin (manufactured by Nippon Polyolefin Co., Ltd., "GH-6300"), the axis of a ball-point pen (inner diameter φ5 mm) was measured by an injection molding machine.
× length 105 mm).

In the above Examples 1 to 12, even when the above various waste by-products are used, a refill case for a mechanical pencil and its lid, tray, It has been found that a ballpoint pen shaft can be manufactured.

[Comparative Example 1] Mandarin peel (manufactured by Mie Prefecture), which is a waste by-product generated after the production of canned Mandarin oranges, was crushed by a crusher using a crushed peel having an average particle size of about 1 mm (water content: 0.1).
%). 40% by weight of the crushed orange peel,
Polyethylene resin (manufactured by Japan Polyolefin Co., Ltd., “MK5
68A ") and 60% by weight, and the production was attempted in the same manner as in Example 11 above. However, it was found that the surface was pocked because the amount of the pulverized material was large.

[0026]

According to the present invention, there is provided a resin molded product in which waste by-products generated in the local industry can be effectively used (recycled) and the waste by-products have an effect as a filler. Further, in the case of a resin molded product using a biodegradable resin as a resin of the resin molding material, the waste by-product is a natural waste, so that it does not cause environmental destruction in combination with the biodegradable resin and has a low environmental load. A resin molded article is provided.

──────────────────────────────────────────────────続 き Continued on the front page (51) Int.Cl. ⁷ Identification symbol FI Theme coat ゛ (Reference) B43L 3/00 ZAB B43L 19/00 ZABH 19/00 ZAB B43M 11/00 ZABA B43M 11/00 ZAB B43K 9 / 00 ZABZ (72) Inventor Osamu Shimizu 1091 Tateishi, Fujioka-shi, Gunma Mitsubishi Pencil Co., Ltd. Gunma R & D Center (72) Inventor Kyoko Kobayashi 1091 Tateishi, Fujioka-shi, Gunma Pref. Gunma R & D Center, Mitsubishi Pencil Co., Ltd. (Reference) 4F071 AA01 AA15 AA20 AA22 AA44 AA73 AB21 AB30 AD02 AE17 AH19 BB05 BC07 4J002 AB031 AB041 AH002 BB011 BB031 BB121 BC021 BG001 BN151 CB001 CF031 CF061 CF171 CF181 CG001 DE236 DJ006 FA016

Claims (4)

[Claims] 1. Waste tea by-products such as tea leaves, citrus peel, peanut shells, cocoons, mushrooms, dried gourds, soybeans, konjac, kumasasa, diatomaceous earth, beer pomace, juice pomace, scallop shells and oysters 1 to 30% by weight, based on the total weight of the resin molding material, of a pulverized product obtained by pulverizing at least one selected from the following shells and having an average particle size of 2 mm or less. 2. The resin molded article according to claim 1, wherein the water content of the pulverized product is 0.5% or less. 3. The resin molded article according to claim 1, wherein the resin of the resin molding material is a biodegradable resin. 4. The resin molded product according to claim 1, wherein the resin molded product is a writing implement or a stationery.