JP4685263B2 - Plastic molding - Google Patents

Description

[0001]
BACKGROUND OF THE INVENTION
The present invention relates to a method for treating waste gloves and a plastic molded body, and more particularly, to a method for producing plastic products using waste gloves as a raw material, instead of disposal by incineration, etc. .
[0002]
[Prior art]
For example, a large number of gloves for work, industrial use, or precision work are used in factories and offices in the metal machinery industry and high-tech industry. After use, these gloves are collected as industrial waste by an industrial waste disposal contractor and then disposed of by incineration.
[0003]
Further, when manufacturing gloves, a large amount of cutting waste is generated, and a defective product is generated although it is a slight amount. Gloves that appear as scraps or defectives are also disposed of as industrial waste, just like used gloves.
[0004]
[Problems to be solved by the invention]
As described above, the conventional treatment of waste gloves is simply disposed of by incineration or the like and has no other useful usage.
In addition, the ash after incineration of used gloves is buried in the final disposal site. However, in recent years, the remaining years of the final treatment plant have been a major social problem. Effective use of gloves is a social issue.
[0005]
In view of the above circumstances, the present inventor has intensively studied to obtain a method for effectively using waste gloves, and as a result, the waste gloves are effectively processed by using the waste gloves as a material (raw material) for plastic products. It is possible to reduce the cost of the manufactured plastic product, and furthermore, since the obtained plastic product can be nailed, it can be used as, for example, a building material, etc. The present invention has been completed.
[0006]
(Object of invention)
Therefore, an object of the present invention is to provide a novel processing method (recycling method) that effectively uses waste gloves.
Another object of the present invention is to provide a plastic molded body using waste gloves as a material or a raw material.
Furthermore, another object of the present invention is to provide a plastic molded body that does not crack even when a nail is hit and has no difference in strength from a normal plastic molded body.
[0007]
[Means for Solving the Problems]
The means of the present invention taken to achieve the above object are as follows. In the first invention, as the rubber or thermoplastic resin has small pieces of the coated spent waste gloves fiber gloves surface, the material comprising a thermoplastic resin to be added as required A plastic molded body characterized by being plasticized by heating.
[0013]
In this specification, the term “waste glove” is not limited to used gloves, but is not likely to be used in the future, even if it is cut or defective in glove manufacturing, or new. It is used as a broad concept including things (for example, those that have been stored for many years as inventory and have problems in selling as products).
[0014]
Examples of the constituent material of the waste gloves include one or two or more materials selected from the group consisting of fiber, leather, rubber, and thermoplastic resin.
Specific types of waste gloves include, for example, (1) textile gloves (knitted gloves, woven gloves, etc.), gloves made of a single material made of leather, rubber, or thermoplastic resin, and (2) Gloves with flocked inner surfaces of rubber or thermoplastic resin gloves, (3) Coating of rubber or thermoplastic resin on the surface of fibers, leather, rubber, or thermoplastic resin gloves (4) Laminated gloves, (4) Rubber or thermoplastic resin glove body with rubber or thermoplastic resin arm cover, (5) Non-slip on fiber glove surface Gloves formed with rubber or thermoplastic resin on the projections, ▲ 6 ▼ Gloves with leather and fiber stitched together (for example, gloves with leather palm and leather on the back), ▲ 7 ▼ Leather and fiber sewed together Rubber gloves and hook-and-loop fasteners It can be exemplified equal stitched gloves, not particularly limited to these.
In addition, as the used gloves, only the same type of used gloves can be selected and used, or a plurality of different types of used gloves can be mixed and used.
[0015]
Examples of the fibers include natural fibers such as wool, cotton, silk, and hemp, and chemical fibers such as polyester, nylon, rayon, acrylic, aramid, high-strength polyethylene, glass fibers, carbon fibers, and ceramic fibers. However, it is not limited to these.
[0016]
Examples of the thermoplastic resin include, but are not limited to, polyvinyl chloride, polyethylene, polyurethane, polyacryl, polyvinyl alcohol, and the like.
[0017]
Examples of the rubber include natural rubber, synthetic rubber such as nitrile rubber, chloroprene rubber, chlorosulfonated polyethylene rubber, silicon rubber, and fluorine rubber, but are not particularly limited thereto.
[0018]
Examples of the leather include, but are not limited to, cows, horses, pigs, deers, goats, sheep, and kangaroos.
[0019]
In order to obtain fluidity of the material and bending strength, a thermoplastic resin is added to the waste gloves as necessary.
[0020]
The thermoplastic resin to be added is polypropylene, polyethylene, polystyrene, polyethylene terephthalate, ABS resin, methyl methacrylate, polyvinyl acetate, vinyl acetate copolymer, polyvinyl chloride, polyvinylidene chloride, fluororesin, polyester, nylon, phenylene oxide. Resins, polyacetals, polyurethanes and the like can be mentioned, but are not particularly limited thereto.
[0021]
When a waste glove containing a thermoplastic resin is used as the material of the plastic molded body, the plastic molded body can be manufactured using only the waste glove without adding the thermoplastic resin. For example, when waste PVC gloves are used, plastic molded products are manufactured using only PVC waste gloves or materials containing polyvinyl chloride waste gloves without adding thermoplastic resin. can do.
Furthermore, in order to obtain fluidity at the time of extrusion molding, a thermoplastic resin can be added as necessary.
[0022]
When using waste gloves made of one or more materials selected from the group consisting of fibers, leather and rubber, a thermoplastic resin is usually added to obtain fluidity during extrusion. .
[0023]
The flexibility and rigidity of the obtained plastic molded body can be adjusted according to the type of waste gloves used as a material, and can also be adjusted according to the type of thermoplastic resin added as necessary.
For example, by using a polyvinyl chloride waste glove containing a plasticizer or increasing the amount added, the flexibility of the plastic molded body can be increased.
For example, if polypropylene is added to the waste gloves as a thermoplastic resin, the rigidity (hardness and strength) of the plastic molded body can be increased. However, depending on the blending ratio of the material, if a plastic molded body is molded with an increased amount of polypropylene to be added, there is a risk of cracking when nailing, so the amount of polypropylene is within the allowable range. It is preferable to adjust appropriately.
[0024]
Waste plastic discharged from factories, offices, or general households can be used as a thermoplastic resin added to waste gloves as needed. The waste plastic is not particularly limited as long as it has thermoplasticity. For example, a plastic bag for glove packaging, a plastic bag for household use, a polypropylene band for packaging, a beverage bottle (pet bottle), A polyvinyl chloride film of a horticultural house can be mentioned.
[0025]
Products (processed products) using the plastic molded body according to the present invention as materials include pallets, factory floor mats, cargo bed sheets, shelf sheets, support materials in the ground, earth stops, boundaries, surveying piles, blocks, etc. , Street tree pillars, planters, sewage mushrooms, flower pots, ikesu, bonsai shelves, fenders, bamboo shoots, etc., but are not limited to these.
[0026]
As a material of the plastic molded body, waste plastics (not limited to thermoplastic resins but including thermosetting resins) can be used in addition to waste gloves and thermoplastic resins. However, when a thermosetting resin is added as waste plastic, it is preferable to adjust the amount of the thermosetting resin to be small so that the fluidity of the material is not impaired.
[0027]
Examples of this waste plastic include sponge debris (polyurethane, etc.) that is produced in large quantities during the manufacture of sponges at the sponge factory (polyurethane, etc.), crushed plastic bottles (polyethylene terephthalate powder), apparel industry, etc. In addition, the used polypropylene hangers used in large quantities can be crushed into small pieces, and the waste polypropylene generated when the wire is coated and crushed into small pieces. Not what you want.
[0028]
Also, for example, waste liquids and lumps generated during glove production and glove material blending, specifically, wastewater produced when washing rubber latex adhering to the production equipment or blending washing is treated. Add the rubber sludge obtained (sludge), polyvinyl chloride paste that does not have a processing function and cannot be used as a material for gloves, or polyvinyl chloride paste containing dust as a material for plastic moldings, and harden and process. You can also.
In addition to sludge generated from various fields such as sewerage, sewage treatment, wastewater treatment and other pollution prevention facilities as a material for plastic moldings, not only those generated with production activities in the mining and agricultural industries It can also be processed.
[0029]
DETAILED DESCRIPTION OF THE INVENTION
The present invention will be described in more detail based on embodiments shown in the drawings.
FIG. 1 is a flowchart showing an embodiment of a method for treating waste gloves according to the present invention,
FIG. 2 is a schematic explanatory view showing a treatment process and a processing apparatus (plastic molding manufacturing apparatus) for waste gloves.
FIG. 3 is a partially abbreviated explanatory view showing an embodiment of a plastic molded body obtained by processing a waste glove, and the back side in the longitudinal direction of the plastic molded body is omitted.
FIG. 4 is a perspective view showing an embodiment of a pallet formed of the plastic molded body shown in FIG.
[0030]
In the present embodiment, a method for treating waste gloves will be described by taking as an example a method for producing a plastic molded body A (see FIG. 3) which is a material (component) of the pallet P shown in FIG.
[0031]
Please refer to FIG. 1, FIG. 2 and FIG.
A plastic plate A is molded using the used waste gloves G and the thermoplastic resin R as materials.
In the present embodiment, a waste glove G in which a polyvinyl chloride is coated (coated or laminated) on a glove body knitted with cotton is used. Specifically, the glove body is coated with 110 to 140 parts by weight of a plasticizer added to 100 parts by weight of polyvinyl chloride.
Further, polypropylene is used as the thermoplastic resin R.
[0032]
The waste gloves G are crushed into small pieces having a size of 30 mm or less by the pulverizer 10 (step S1).
Similarly, the thermoplastic resin R is pulverized to a size of 30 mm or less by the pulverizer 10 (step S2).
[0033]
100 parts by weight of the crushed small pieces of waste gloves and 100 parts by weight of the crushed small pieces of thermoplastic resin are uniformly mixed by the mixer 20 to obtain a plastic mixture (step S3). In the present embodiment, a mortar mixer (model KAM-6) manufactured by Koyo Machine Industry Co., Ltd. is used as the mixer 20.
[0034]
An extruder (also referred to as an extrusion molding machine) 30 is filled with a plastic mixture obtained by mixing small pieces of waste gloves and a thermoplastic resin with a mixer 20. In the extruder 30, the plastic mixture is stirred at 180 to 200 ° C. and enters a molten state (step S <b> 4).
[0035]
Next, the molten plastic mixture is poured from the extruder 30 into the mold 40 (step S5).
The mold 40 to be used has a shape and volume capable of molding the plastic molded body A to be molded. Reference numeral 41 denotes an injection port for injecting the molten plastic mixture into the mold 40. In a state where the extruder 30 and the mold 40 are fixed by a hydraulic cylinder (not shown), a molten plastic mixture is poured into the mold 40.
[0036]
The mold 40 is provided with a cooling water circulation jacket 42 that cools the mold 40 with cooling water and solidifies the molten plastic mixture. Since the mold 40 is a well-known technique, a detailed description thereof will be omitted.
[0037]
Note that the use of a plurality of molds 40 can increase the production efficiency of the plastic molded body. When using a plurality of molds 40, for example, the molds 40,... Are arranged side by side with the injection port 41 facing the extruder 30, and the molds 40,. It can also be configured such that a molten plastic mixture can be poured into the mold 40 continuously.
[0038]
Cooling water is circulated through the jacket to cool the mold 40 and solidify the molten plastic mixture (step S6).
The solidified plastic mixture is taken out from the mold 40 to obtain a plastic molded body A (step S7).
The plastic molded body A is cut into a required size to obtain a plastic plate A1 that is a component of the pallet P (step S8).
[0039]
The plastic molded body A obtained as described above uses a glove whose surface is coated with polyvinyl chloride as one of the materials, and the polyvinyl chloride contains a plasticizer. The plasticizer contained in the waste gloves has excellent effects such as imparting fluidity to the material to facilitate molding of the plastic molded body and imparting flexibility to the plastic molded body A. Therefore, the amount of plasticizer in the entire material can be adjusted by changing the amount of waste gloves containing this plasticizer, and as a result, the fluidity of the material and the flexibility of the plastic molded body can be adjusted. it can. That is, even if a plasticizer is not newly added separately (separately) as a material, the fluidity of the material and the flexibility of the plastic molded body can be adjusted by adjusting the amount of waste gloves added.
In addition, when the waste glove which does not contain the plasticizer as a material is used, a plasticizer can also be added separately.
[0040]
Further, since the glove body is knitted with cotton, a lot of cotton fibers 1 are mixed in the molded plastic body A after molding as shown in FIG.
[0041]
The direction of the cotton fiber 1 is directed in the same fixed direction as the longitudinal direction of the plastic molded body A, that is, the extrusion flow direction of the extruder 30. That is, the direction of the complicated fiber mixed in the plastic mixture can be set to a certain direction during extrusion molding. Therefore, similarly to wood, which is a collection of directional fibers (cells), the cotton fiber 1 has a function as a reinforcing material and improves the strength of the plastic molded body A.
[0042]
Therefore, a plastic molded body not mixed with cotton fibers was molded as a comparative example with respect to the plastic molded body A mixed with the cotton fibers 1, and nailing was performed using a nailing machine under the same conditions. As a result, the plastic molded body A in which the cotton fiber 1 was mixed could be nailed without any problem, but the plastic molded body in which the cotton fiber was not mixed was broken as the material for hitting the nail when the nail was struck. Cannot be used. From this experimental result, it was proved that the cotton fiber 1 has a function as a reinforcing material and improves the strength of the plastic molded body A.
[0043]
Further, since the nail is entangled with the cotton fiber 1 mixed inside, there is no fear that the nail once hit is easily pulled out like the wood. Furthermore, the plastic molded body A could be easily cut with a saw, like wood.
[0044]
Although the reason for the above phenomenon in which the direction of the fiber becomes a certain direction is not certain, it is considered that the fiber is given directionality when the plastic containing the plasticized fiber flows through the extruder.
[0045]
Further, when the glove body knitted with cotton is finely crushed and fine cotton fibers 1 are mixed into the plastic molded body A as in the present embodiment, the plastic molded body A as shown in FIG. It is shape | molded so that the cotton fiber 1 may gather in the center part. On the other hand, when the glove G is pulverized to a larger size by the pulverizer 10 and larger cotton fibers are mixed into the plastic molded body A, the cotton fibers 1 are also formed on the surface of the plastic molded body A, although not shown. Appears. The reason for this phenomenon is not clear, but it seems that the size of the cotton fiber 1 affects the fluidity of the molten plastic mixture when the mold 40 is injected.
As described above, various plastic molded bodies A having different taste and appearance at the cross section can be obtained by adjusting the size of the mixed fibers.
[0046]
A pallet P as shown in FIG. 4 was manufactured as follows using a plastic plate A1 obtained by cutting the plastic molded body A into a required size.
First, the plastic plate A1 is further cut into a required size, and the required number of cross-sectional rectangles (six in the present embodiment) upper plate 3 and the required number of cross-sectional rectangles (three in the present embodiment). The lower plate 4 and the required number of girders 5 (three in the present embodiment) having a rectangular cross section for connecting the upper plate 3 and the lower plate 4 were formed. Then, the plates 3, 4 and 5 were assembled, and nails were driven and fixed to obtain a pallet P as shown in FIG. In FIG. 4, two gaps 6 and 6 surrounded by the upper plate 3, the lower plate 4 and the girder plate 5 constitute a fork insertion portion of the forklift.
[0047]
Since the pallet P is formed of a plastic plate A1 manufactured from a plastic material including polypropylene, it is less likely to corrode by rainwater or the like than a wooden pallet.
Moreover, compared with a wooden pallet, the attached dirt can be easily removed, and wood powder does not come out at the time of friction.
Furthermore, since the cotton fiber 1 is a reinforcing material, it is resistant to external impacts and hardly breaks.
Furthermore, as with the wooden pallet, if there is a damaged part, the nail can be removed and the damaged part can be replaced with a new plastic plate A1 for repair.
[0048]
Note that the terms and expressions used in this specification are merely explanatory and are not restrictive, and do not exclude terms and expressions equivalent to the above terms and expressions. The present invention is not limited to the illustrated embodiment, and various modifications can be made within the scope of the technical idea.
[0049]
【The invention's effect】
The present invention has the above-described configuration and has the following effects.
(A) According to the waste glove disposal method according to the present invention, it is possible to treat waste gloves that are simply disposed of by incineration or the like by an industrial waste disposal contractor and have no other useful usage, while effectively utilizing Moreover, the cost of the manufactured plastic molded body (plastic product) can be reduced.
[0050]
(B) When a waste glove containing fibers is used as the material of the plastic molded body, a plastic molded body mixed with the fibers can be obtained. According to this method, since nailing can be performed, it can be used as, for example, a building material or the like, and has high added value such as no problem in strength (there is no difference from a normal plastic molded body in strength). Plastic molded products (plastic products) can be produced.
[0051]
(C) When a waste glove containing a plasticizer is used as the material of the plastic molded body, the amount of plasticizer in the entire material can be adjusted by changing the amount of waste glove containing the plasticizer. As a result, the fluidity of the material and the flexibility of the plastic molded body can be adjusted. That is, even if a plasticizer is not newly added separately (separately) as a material, the fluidity of the material and the flexibility of the plastic molded body can be adjusted by adjusting the amount of waste gloves added.
[Brief description of the drawings]
FIG. 1 is a flowchart showing an embodiment of a method for treating waste gloves according to the present invention.
FIG. 2 is an explanatory view showing a waste glove treatment process and a treatment apparatus (plastic molded body production apparatus).
FIG. 3 is a partially abbreviated explanatory view showing an embodiment of a plastic molded body obtained by processing waste gloves.
4 is a perspective view showing an embodiment of a pallet formed of the plastic plate shown in FIG. 3. FIG.
[Explanation of symbols]
A Plastic molding A1 Plastic plate P Pallet G Waste glove R Thermoplastic resin 10 Crusher 20 Mixer 30 Extruder 40 Mold 41 Injection port 42 Jacket 1 Cotton fiber 3 Upper plate 4 Lower plate 5 Girder plate

Claims (1)

It is necessary to heat and plasticize a material consisting of a piece of used waste glove whose surface is coated with rubber or thermoplastic resin on a fiber glove surface and thermoplastic resin added as necessary. Characteristic plastic molding .

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