JP2003118803A - Draining bag for garbage treatment machine - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a draining bag for facilitating biodegradation with a component forming device and disappearance of shape with heating and drying treatment. SOLUTION: The draining bag is formed of a meshed or non-woven fabric shaped resin composition composed of a biodegradable polymer compound having a thermal deformation temperature of 40 deg.C to 80 deg.C. The draining bag can be treated into the state of retaining no shape in the heating and drying garbage treatment machine at a treatment temperature of 60 deg.C-100 deg.C in two treatment hours or shorter.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a water sack for a food waste disposer suitable for composting and heat-drying food waste disposer made of a biodegradable polymer compound, more specifically, biodegradation by a composting device. The present invention also relates to a water-drainage bag for a food waste disposer that easily loses its shape due to heat-drying treatment.

[0002]

2. Description of the Related Art Raw garbage includes kitchen garbage from homes and restaurants, processing residues from food processing factories, agricultural and marine product wastes, and the like. In order to dispose of these raw garbage, landfilling or incineration was performed as it was, but the amount of discharged garbage was large and the cost of collecting garbage was high, and the generation of odors at the landfill site There are problems such as lack of incineration capacity of garbage incinerators related to the problem and dioxin problem.

Therefore, in order to reduce the amount of collected waste and to avoid incineration, raw waste treatment such as composting treatment at individual emission sources such as homes and business establishments, separate collection of raw garbage and centralized composting treatment, etc. Is being considered.

Further, as a garbage bag for storing raw garbage,
A wide range of proposals have been made from conventional non-biodegradable synthetic resins such as polyethylene to those made from biodegradable resins, but in order to prevent the composting process of raw garbage from being a product, It is preferable to use a biodegradable resin so that plastic scraps and the like do not remain in a certain compost.

A biodegradable resin has almost the same physical properties as a general-purpose plastic at the time of use, but after disposal, it can be rapidly treated with bacteria, mold, etc. in an environment such as activated sludge, soil, water, or compost. Microorganisms or macromolecules that are decomposed and assimilated by natural conditions such as temperature, humidity, and light, and eventually become carbon dioxide and water. Traditionally,
As the biodegradable resin, a starch-PVA (polyvinyl alcohol) resin, a PVA-aliphatic polyester resin, a blend resin composition of an aliphatic polyester resin-polyolefin resin, an aliphatic polyester resin, a polycaprolactone resin, etc. BACKGROUND ART Resins and the like are known, and food waste storage bags using these are proposed.

[0006] In reducing the amount of raw garbage and composting, it is important to prevent the input of raw garbage with a high water content in order to secure the processing capacity. There is a draining bag installed in the drainage part of the sink.

[0007] Further, the water sack for a food waste disposer also has a role of preventing solid contents that are difficult to decompose or may cause clogging from flowing out to the sewage and the sewage system.

A draining bag made of a biodegradable resin has already been proposed (Japanese Patent Laid-Open No. 8-849).
81, JP-A-8-157002, JP-A-9
-30601, JP-A-10-157765, JP-A-10-157803, and JP-A-10-3.
16739, JP 2000-34657 A, JP 2001-89649 A).

However, while including the problem that it takes a long time to disassemble, a draining bag for performing composting treatment at high temperature in a short time using a composting device,
Although it exists as a raw garbage storage bag for composting a large amount of collected garbage, when it is put into a heating-drying raw garbage processing device that is effective for reducing the volume of raw garbage in a short time, Whether it is a non-biodegradable synthetic resin such as polyethylene used, or one that uses a biodegradable resin, heat treatment will cause the resin to fuse to the device, block, or wrap around the stirring blades. There is a problem in that a malfunction of the processing device may occur, and a lump of the hardly-decomposable resin may remain in the dried processed food waste that can be used as a fertilizer.

[0010]

SUMMARY OF THE INVENTION It is an object of the present invention to provide a water drainage bag for a food waste disposer which is not only biodegradable and processed by a composting device but also easily loses its shape due to a heat drying process.

[0011]

The present inventors have found that the use of a biodegradable polymer compound having a specific thermophysical property as a material can cause loss of shape due to heat drying treatment. The present invention has been completed.

The water sack for a food waste disposer of the first invention is
It is characterized by being formed by molding a resin composition comprising a biodegradable polymer compound having a heat distortion temperature of 40 ° C. or higher and 80 ° C. or lower. More preferably, in the first invention, the resin composition is formed by molding a resin composition made of a biodegradable polymer compound having a heat distortion temperature of 40 ° C. or higher and 80 ° C. or lower.

A third aspect of the present invention is a water-disposable bag for a garbage processor,
In the first invention, the resin composition comprising the biodegradable polymer has a melt viscosity at 100 ° C. of 100 Pa · sec.
It is characterized in that it is 1000 Pa · sec or less.

A water drainage bag for a food waste disposer according to a fourth aspect of the present invention is
In the first invention, the biodegradable polymer compound is obtained by using plant tissue as a raw material.

A water drainage bag for a food waste disposer according to a fifth aspect of the present invention is
In the fourth invention, the biodegradable polymer compound is selected from the group consisting of polylactic acid, polyhydroxyalkanoic acid, cellulose derivative, polyglycolic acid, and polycaprolactone.

A sixth aspect of the present invention is a water-disposable bag for a food waste processor.
A fifth aspect of the invention is characterized in that a resin composition comprising a biodegradable polymer compound is processed into a net shape.

A water drainage bag for a food waste disposer according to a seventh aspect of the present invention,
A fifth aspect of the invention is characterized in that a non-woven fabric is processed into a resin composition comprising a biodegradable polymer compound.

[0018]

BEST MODE FOR CARRYING OUT THE INVENTION (Embodiment 1) The water sack for a food waste disposer of the first invention has a heat distortion temperature of 40 ° C. or higher and 80 or higher.
It is characterized by being molded as a resin composition comprising a biodegradable polymer compound having a temperature of not higher than 0 ° C.

In the heat-drying type food waste processing apparatus, the temperature inside the apparatus is generally about 80 to 100 ° C. Therefore, by setting the heat distortion temperature to 80 ° C. or less, the food waste is processed by heating and drying the food waste. It is possible to soften and deform the constituent materials of the water bag for machines. Since the food waste disposer is equipped with a stirrer, the water sachet loses its shape when it is agitated together with the food waste in the temperature range where it can be softened and deformed, and becomes disjointed. By being separated in this way, the water-blown bag constituent material is a resin composition composed of a biodegradable polymer compound even if it exists together with dried garbage.
Even if it is sprayed in the soil and used as fertilizer, it is biodegraded in a short time.

On the other hand, by setting the heat distortion temperature to 40 ° C. or higher, it is possible to avoid problems such as blocking during storage in general household or business use. More preferably, in the first invention, the resin composition is formed as a resin composition composed of a biodegradable polymer compound having a heat distortion temperature of 50 ° C. or higher and 70 ° C. or lower.

By setting the heat distortion temperature to 70 ° C. or lower, it is possible to more quickly soften and deform the material composing the water drainage bag by heating and drying the raw garbage, and also to compost the raw garbage treatment. Also, in the case of the softening of the resin, biodegradation is likely to proceed.

On the other hand, when the heat distortion temperature is set to 50 ° C. or higher, it is installed at the sink drainage port in general household or business use. The trouble can be avoided.

The resin composition comprising a biodegradable polymer compound capable of having a heat distortion temperature as described above is a biodegradable polymer compound or a mixture thereof, and a plastic compound biodegradable therewith. It can be obtained as a mixture of agents and additives.

Examples of biodegradable polymer compounds include microbial synthetic polymers such as poly (hydroxybutyrate / valerate), bacterial cellulose, pullulan and curdlan,
Polyhydroxyalkanoates such as polylactic acid, poly-
γ-methyl glutamate, polycaprolactone, polyglycolic acid such as polybutylene succinate, chitin,
Examples thereof include chitosan, starch, polyvinyl alcohols, and cellulose derivatives such as cellulose acetate.

Each of these polymer compounds has a heat distortion temperature depending on the structure and molecular weight distribution, but particularly in the polyhydroxyalkanoate, the monomer itself has an optical isomerism of D-form and L-form, and in the polymer, the constitutional monomer Physical properties can be controlled according to the constituent optical purity (generally, the higher the optical purity, the higher the heat distortion temperature).

When the heat distortion temperature of the polymer compound itself is higher than the desired range, lauric acid amide, palmitic acid amide, palmitic acid amide, stearic acid amide,
Stearic acid amide, stearic acid amide, behenic acid amide, behenic acid amide, hydroxystearic acid amide, oleic acid amide, methylenebisstearic acid amide, ethylenebiscapric acid amide, ethylenebislauric acid amide, ethylenebisstearic acid amide, ethylene Bisisostearic acid amide, ethylenebishydroxystearic acid amide, ethylenebisbehenic acid amide, hexamethylenebisstearic acid amide, hexamethylenebisbehenic acid amide, hexamethylenebishydroxystearic acid amide, N, N′-distearyl adipate amide , N, N'-distearyl sebacic acid amide, erucic acid amide, ricinoleic acid amide, ethylenebisoleic acid amide, hexamethylenebisoleic acid amide, N, N'-dioray Adipic acid amide, N, N '
-Dioleyl sebacic acid amide, N-stearyl stearic acid amide, N-oleyl oleic acid amide, N-stearyl oleic acid amide, N-oleyl stearic acid amide, N-stearyl erucic acid amide, N-oleyl palmitic acid amide, methylol Stearic acid amides; fatty acid amides such as methylol behenic acid amide, N, N-distearylisophthalic acid amide, metaxylylenebisstearic acid amide, paraffin wax, stearyl alcohol, stearic acid, butyl stearate, stearic acid monoglyceride , Pentaerythritol tetrastearate, stearyl stearate and other stearic acid esters, or dioctyl adipate, diisononyl adipate, dioctyl sebacate and other fatty acid esters Alternatively, dibasic acids - such as polyester plasticizer is a low polymerization degree condensates of glycols, various plasticizers can lower the heat distortion temperature by mixing appropriately.

Further, heat stabilizers, fillers, fillers such as calcium carbonate, lubricants, decomposition accelerators, colorants (black, white,
Green, orange, etc.), flame retardant, waterproofing agent, autoxidizer, UV stabilizer, cross-linking agent, certain antibacterial agents and herbicides,
Antioxidants, deodorants and the like can be added.

Furthermore, oxo acids (eg, oxo acids having about 2 to 6 carbon atoms such as glycolic acid, lactic acid, citric acid, tartaric acid, malic acid, etc.) and saturated dicarboxylic acids (eg, oxalic acid, malonic acid, amber) Acids, succinic anhydride, glutaric acid, etc., and organic acids such as low-saturated dicarboxylic acids having about 2 to 6 carbon atoms) and these organic acids and carbon atoms of 1 to 4
Biodegradation promoters such as lower alkyl esters with alcohols to a certain extent, benzoins, benzoin alkyl ethers, benzophenone, benzophenone and its derivatives such as 4,4-bis (dimethylamino) benzophenone, acetophenone, α, α-diyne Photodecomposition of acetophenone and its derivatives such as ethoxyacetophenone, quinones, thioxanthones; photoexciter such as phthalocyanine, anatase type titanium oxide, ethylene-carbon oxide copolymer, sensitizer of aromatic ketone and metal salt You may add a promoter. The heat distortion temperature is JIS K720.
7 or the temperature measured by the method defined in ASTM D-648.

(Embodiment 2) A water-drainage bag for a food waste disposer according to a second aspect of the invention has a melt viscosity at 100 ° C. of a resin composition comprising a biodegradable polymer compound according to the first aspect of the invention of 100 Pa · sec. It is characterized in that it is 1000 Pa · sec or less. Due to the resin composition having a melt viscosity in the above range, the resin composition that forms the water bag for the food waste disposer easily loses its shape due to the stirring operation during the heat-drying treatment, and has a diameter of several millimeters. Since it is dispersed finely, it is possible to obtain the property of being biodegraded in a shorter time even when it is present together with the food waste that has been subjected to the heat-drying treatment, or when it is applied to the soil or the like and is used as a fertilizer.

With a resin composition having a melt viscosity smaller than the above numerical range, it is not easy to secure sufficient strength even if a water-drain bag is constructed, and the melt viscosity is larger than the above numerical range. In such a resin composition, the resin composition exists in a relatively large size even after the heat-drying treatment, and a sufficiently high biodegradation rate cannot be obtained.
The melt viscosity is a physical property that can be measured with a flow tester or the like.

(Embodiment 3) A water drainage bag for a food waste disposer according to a third aspect of the present invention is characterized in that the biodegradable polymer compound according to the first aspect is derived from a plant tissue. Plant tissue is a form in which carbon dioxide in the atmosphere is fixed to carbohydrates by photosynthesis using solar energy, so if a biodegradable polymer compound made of this is used as a raw material, it may be incinerated. However, since the contribution to global warming due to the raw materials is eliminated (although the effect due to the manufacturing energy remains), the environmental load can be greatly reduced.

(Embodiment 4) In the water drainage bag for a food waste disposer of the fourth invention, in the first invention, the biodegradable polymer compound is polyhydroxyalkanoic acid, cellulose derivative, polyglycolic acid, polycaprolactone. Is selected from the group of. Since these high molecular compounds are easily decomposed by hydrolases and cellulases produced by microorganisms existing in nature, even if they are used as fertilizer with soil that has been heat-dried, they can be used for a shorter period of time. It is possible to obtain the property of being biodegraded into.

(Embodiment 5) A water drainage bag for a food waste disposer according to a fifth aspect of the present invention is characterized in that the resin composition comprising a biodegradable polymer compound according to the first aspect is processed into a net. . Drainage is improved by processing the net,
The heating and drying method is effective in reducing the input energy required for drying, and the composting method is effective in avoiding a decrease in decomposition rate because it can prevent a decrease in porosity due to water.

(Embodiment 6) A water drainage bag for a food waste disposer according to a sixth aspect of the present invention is characterized in that the resin composition comprising the biodegradable polymer compound in the first aspect is processed into a non-woven fabric. By processing non-woven fabric, it is possible to achieve both high solid content trapping ability of drainage bag and drainage, reducing the environmental load on sewage, and reducing the input energy required for drying in the heat drying method, and composting. In this method, it is possible to prevent a decrease in the porosity due to water, and thus it is effective in avoiding a decrease in the decomposition rate.

The method for processing the nonwoven fabric is not particularly limited, but as described in "Manufacture and Application of Nonwoven Fabrics" published by CMC Co., Ltd., edited by Yoshio Nakamura, published in 1989, adhesives and heat-bonded fibers are used. A method of fixing the fibers with each other, a method of fixing the mechanical entanglement by punching, etc., a method of spreading the spun fibers by various methods and heat-sealing, a method of drawing the spun fibers with an adhesive. Examples thereof include a method of fixing and heat fusion.

The present invention will be described in more detail based on the following examples, but the invention is not intended to be limited thereto.

[0037]

Example 1 Polylactic acid (Racia H-100J, Mitsui Chemicals, Inc.) having a heat distortion temperature of 55 ° C. was extruded from a nozzle through a kneading extruder and stretched to form a fiber. This was knitted in a mesh shape, the overlapping points were melted and fixed, and then processed into a bag shape to obtain a water-dried bag 1.

Example 2 To 100 parts by weight of polycaprolactone (Daicel Chemical Industry Co., Ltd. Cell Green HB02) was added 7 parts by weight of oleic acid amide, and the mixture was kneaded using a kneading extruder. A 20 cm long mesh bag having a diamond-shaped mesh with a fiber thickness of 0.3 mm and a mesh size of 1.0 mm is continuously produced and has a length of 20.
It was cut into cm and the bottom was fused and processed into a mesh bag having an internal capacity of about 3 liters. This was designated as a drainage bag 2.

(Example 3) Polybutylene succinate
Adipate (Bionore # 3020, Showa High Polymer Co., Ltd.)
20 parts by weight of a polyester plasticizer was added to 100 parts by weight of a twin-screw kneading extruder and pelletized, and a fiber having a thickness of 0.5 mm was obtained by a melt spinning machine, and a fused non-woven fabric was formed by using the fiber. This is cut into a bag shape and fused, and the internal volume is about 3
Processed into a liter non-woven bag. This was designated as a drainage bag 3.

Example 4 3 parts by weight of dioctyl sebacate was added to 100 parts by weight of polycaprolactone (Cell Green H7 manufactured by Daicel Chemical Industries, Ltd.), and the mixture was put into a twin-screw kneading extruder to be pelletized, and further the rotary molding machine was used. In this way, a raw material of a mesh bag with a diameter of 16 cm and a diamond-shaped mesh with a fiber thickness of 0.3 mm and an opening of 1.0 mm is continuously manufactured, cut into a length of 20 cm, and the bottom portion is fused to obtain the internal volume. It was processed into a mesh bag of about 3 liters. This was designated as a drainage bag 4.

Comparative Example 1 Polypropylene was continuously produced by a rotomolding machine into a mesh bag having a diameter of 16 mm and a diamond-shaped mesh having a mesh thickness of 1.0 mm and a mesh size of 1.0 mm and a diameter of 16 cm, and a length of 20 cm. It was cut into pieces, and the bottom portion was fused and processed into a mesh bag having an internal capacity of about 3 liters. This was designated as a drainage bag 1 '.

Comparative Example 2 Polybutylene succinate
Adipate (Showa High Polymer Co., Ltd. Bionore # 1001)
100 parts by weight of 10 parts by weight of a polyester plasticizer was charged into a biaxial kneading extruder and pelletized, and a fiber having a thickness of 0.5 mm was obtained by a melt spinning machine, and a fused non-woven fabric was formed using the fiber. This is cut into a bag shape and fused, and the internal volume is about 3
Processed into a liter non-woven bag. This was designated as a drainage bag 2 '.

(Comparative Example 3) Starch / polyvinyl alcohol mixed resin (Matabi ZFU03 manufactured by Nippon Synthetic Chemical Industry Co., Ltd.)
/ A) film is cut and the two corners are fused to form a bag,
A large number of holes having a diameter of 5 mm were provided around the bottom to form a drainage bag 3 '.

Comparative Example 4 100 parts by weight of polycaprolactone (Cell Green H7, manufactured by Daicel Chemical Industries, Ltd.) was added with 25 parts by weight of oleic acid amide, and the mixture was put into a twin-screw kneading extruder to be pelletized, and further the rotary molding machine was used. In this way, a raw material of a mesh bag with a diameter of 16 cm and a diamond-shaped mesh having a fiber thickness of 0.3 mm and an opening of 1.0 mm is continuously manufactured, and a length of 2
It was cut to 0 cm, the bottom part was fused, and processed into a mesh bag having an internal capacity of about 3 liters. This was designated as a drainage bag 4 '.

However, while the samples were piled up and stored, blocking occurred between the samples and they became lumps and could not be put to practical use.

(Physical property measurement examples 1 to 4 and 1'to 4 ') A predetermined test piece was prepared by compression molding from the state of pellets before being processed into the shape of the draining bag, and the heat distortion temperature was measured,
The melt viscosity of the pellets at 100 ° C was measured using a flow tester (manufactured by Shimadzu Corporation). The results are shown in (Table 1).

(Use Examples 1 to 4, 1'to 3 ') About 700 g of standard garbage is packed in the watering bags 1 to 4 and 1'to 3' produced above, and the heat-drying type garbage disposal and composting type raw material are used. It was thrown into the garbage processor and treated. Regarding the treatment with the heat-drying type garbage treatment machine, the state of the garbage and the water bag when the processing is completed judged by the equipment, and regarding the treatment with the compost type garbage treatment machine, the state of the garbage and water bag Observations were made daily. The above results are also shown in (Table 1).

[0048]

[Table 1]

In the case of the heating and drying method, the treatment was completed 1.75 hours after the treatment was started in any case.

[0050]

EFFECTS OF THE INVENTION According to the present invention, it is possible to obtain a water-drainage bag for a food waste disposer which is easily biodegraded by a composting device and easily loses its shape due to heat drying treatment.

   ─────────────────────────────────────────────────── ─── Continued front page    F-term (reference) 3E023 BA01                 4D004 AA03 BA04 CA13 CA15 CA19                       CA22 CA42 CB50 DA03 DA06                       DA20                 4J002 AA011 AB011 AB021 AB041                       AB051 BE021 CF181 CF191                       EC066 EF056 EH036 EH056                       EH096 EP016 EP026 FD010                       FD026 FD090 FD200 GC00                       GK01 GT00

Claims (7)

[Claims] 1. A watering bag for a food waste disposer, which is a resin composition comprising a biodegradable polymer compound having a heat distortion temperature of 40 ° C. or higher and 80 ° C. or lower. 2. The water sack for a food waste disposer according to claim 1, which is a resin composition comprising a biodegradable polymer compound having a heat distortion temperature of 50 ° C. or higher and 70 ° C. or lower. 3. The melt viscosity at 100 ° C. is 100 Pa.
The water drainage bag for a food waste disposer according to claim 1, wherein the water drainage bag is not less than sec and not more than 1000 Pa · sec. 4. The water sack for a food waste disposer according to claim 1, wherein the biodegradable polymer compound is made of plant tissue as a raw material. 5. The garbage disposal according to claim 4, wherein the biodegradable polymer compound is selected from the group consisting of polylactic acid, polyhydroxyalkanoic acid, cellulose derivative, polyglycolic acid and polycaprolactone. Irrigation bag. 6. The water sack for a food waste disposer according to claim 5, wherein a resin composition comprising a biodegradable polymer compound is processed into a net shape. 7. The water sack for a food waste disposer according to claim 5, wherein a resin composition comprising a biodegradable polymer compound is processed into a non-woven fabric.