JP3072595B2 - Vegetable fiber disposable container and tool, method for manufacturing the same, and mold for manufacturing container and tool - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a disposable container and utensil made of plant fiber, and more particularly, to a method for reducing the production cost by using plant fiber such as straw as a main raw material and molding the powder in a powder state. The present invention relates to a disposable container and tool made of plant fiber, which simplifies a processing step and further prevents environmental pollution due to disposal, a method for manufacturing the same, and a mold for manufacturing the container and tool.

[0002]

2. Description of the Related Art Conventionally, disposable containers made of paper, styrofoam (resin) and the like have been used, and most of them are used as containers for ready-to-eat foods or containers for take-out lunches. Waste is disposed of as industrial waste.

[0003]

However, there is a problem that a resin container using styrofoam or the like is difficult to decompose by microorganisms, is difficult to recycle, and accumulates as white contamination when discarded. Also,
Since petroleum is used as a raw material for resin, it is not preferable from the viewpoint of protection of petroleum resources. The present invention has been made in order to solve such conventional problems, and its purpose is to reduce production costs by using plant fibers such as straw as a main raw material, and furthermore, to reduce the cost of powder. It is an object of the present invention to provide a disposable container / tool made of plant fiber and a method for manufacturing the same, and a mold for manufacturing the container / tool, which can simplify a processing step by molding in a state and prevent environmental pollution due to disposal.

[0004]

According to a first aspect of the present invention, there is provided a disposable container / tool made of plant fiber, wherein the plant fiber, carbamide resin, and melamine resin are pulverized and mixed to obtain a powdery state. And heat molded.

[0005] The disposable container made of vegetable fiber according to claim 2
In the tool, the plant fiber disposable container / tool according to claim 1 was obtained by pulverizing and mixing 60% to 90% of plant fiber, 7% to 35% of carbamide resin, and 3% to 10% of melamine resin.

A disposable container made of vegetable fiber according to claim 3
3. The disposable container or utensil made of plant fiber according to claim 1 or 2, wherein the carbamide resin is replaced by a polymer of ethylene and carbon monoxide, a polymer of vinyl-based ketone, styrene, (propylene or ethylene), and light irradiation. Polyolefin or polystyrene containing an activator and a light resistive agent, polyethylene containing an antioxidant and a light activator, polyolefin containing a light activator, poly-3-hydroxyl butyric acid or poly-3-hydroxyl valeri
c acid, polycaprolactone, polyvinyl alcohol,
Either a polymer of ethyl acrylate and maleic anhydride, a starch-filled plastic, cellulose acetate, gelatin, or polylactic acid was used.

The disposable container made of vegetable fiber according to claim 4
In the manufacturing method of the utensil, plant fiber, carbamide resin, and melamine resin were pulverized finely than 60 meshes, mixed, and heat molded.

The disposable container made of vegetable fiber according to claim 5
In the manufacturing method of the utensil, 60% to 90% of vegetable fiber, 7% to 35% of carbamide resin, and 3% to 10% of melamine resin are pulverized and mixed, and the temperature of the mold is set to 105 ° C to 210 ° C.
3 seconds to 30 seconds at a pressure of Kg / cm2 to 60 Kg / cm2.
Press for several seconds and repeat the press several times.

According to a sixth aspect of the present invention, there is provided a mold comprising a container-shaped female mold and a male mold fitted to the female mold, wherein an exhaust hole is formed along an outer periphery of the male mold. A ridge is formed along the upper outer edge of the female mold, a groove is formed along the lower outer edge of the male mold, and the ridge and the groove are fitted when the mold is closed to form the mold. The inside is sealed and the burr is prevented from occurring.

[0010]

Embodiments of the present invention will be described below. Disposable tableware (containers and utensils) made of vegetable fiber of the present invention
Is a container obtained by pulverizing plant fiber, carbamide resin, and melamine resin into powder, and heat-molding the powder in a mold in a mold. The vegetable fiber used is obtained by drying and drying food husks, acne, straw and the like. Carbamide resin is a thermosetting resin derived from the reaction of urea (carbamide) with formaldehyde or formaldehyde polymer.
Use maldehyda molding compound. Melamine resin is a kind of amino resin, a thermosetting resin obtained by condensation of melamine and aldehyde.
Use triamide cyanuramide.

[0011] When manufacturing disposable tableware (containers and utensils) made of vegetable fiber, first, food fibers such as food hulls, cane, and straw are dried and dried, and then pulverized to a size of about 60 meshes with a pulverizer. Here, the 60th is 1 square inch (2.45 ×
2.45 cm) is divided into 60. next,
The carbamide resin and the melamine resin are each pulverized by a pulverizer into a size of about 60 meshes. In addition, you may use the powder grind | pulverized more than 60 eyes. And dietary fiber 80
% (Weight%, the same applies hereinafter), carbamide resin 15%, and melamine resin 5% are put into a mixer and mixed for 5 minutes. The mixed powder is sent to a raw material inlet through an air pipe.

Then, the female mold is set at 160 ° C. and the male mold is set at 1 ° C.
Heat to 70 ° C. Open the raw material inlet, put the mixed powder in the female mold, operate the pressurizing device, and mix the mixed powder to 40 kg / cm.
Press at a pressure of 2 for 3 seconds and repeat the press 3 times continuously. After pressing, when the female mold and the male mold are removed, a press-formed disposable tableware (container / tool) is formed. As described above, since the molding is performed in the state of the powder, the processing steps are simplified.

The following 13 substances can be used in place of the carbamide resin. 1. 1. Polymer of ethylene and carbon monoxide 2. Polymer of vinyl group ketone, styrene, (propylene or ethylene) 3. polyolefin or polystyrene containing a light irradiation activator and a light resistance agent 4. Polyethylene containing antioxidant and light irradiation activator 5. Polyolefin containing light irradiation activator 6. Poly-3-hydroxyl butyric acid or poly-3-hydroxyl valeric acid 7. polycaprolactone 8. Polyvinyl alcohol (Poval) 9. Polymer of ethyl acrylate and maleic anhydride 10. Starch-filled plastic (mixture of starch and plastic) 11. Cellulose acetate (acetylcellulose) Gelatine 13. Polylactic acid

As shown in FIGS. 1 to 3, the mold 1 has a female mold 3 having a concave portion 2 along the outer shape of a molded product.
The male mold 4 is fitted in the circular concave portion 2 of the female mold 3 and the tableware (containers and utensils) is provided between the two.
Is to be press-molded. On the outer edge of the upper end of the female mold 3, a raised ridge 5 which contacts the male mold 4 when closing the mold is formed. A groove 6 is formed on the outer edge of the male mold 4 so that the raised ridge 5 is fitted therein. When the mold is closed, the raised ridge 5 and the groove 6 are closed.
Abuts to prevent leakage of the raw material and to cut burrs generated at the outer edge of the molded product at this portion.
When the male mold 4 and the female mold 3 are closed, the gap between the male mold and the female mold becomes 0.03 mm to 0.05 mm. When the raw material is pressed, the male mold 4 and the female mold 3 are completely crimped from 0.3 seconds to
The ridge 5 and the groove 6 are brought into close contact with each other 0.5 seconds ago, and then the male mold 4 and the female mold 3 are closed with strong pressure, so that leakage of the raw material is prevented and sealing is performed, and pressing is performed with high pressure. . In addition, since a powdery raw material is used, the raw material in the female mold is dispersed vertically and horizontally when the mold is closed during pressing, and is uniformly filled in the mold and pressed. Therefore, occurrence of defective products is reduced.

Further, an exhaust hole 7 is formed along the outside of the male mold groove. The exhaust hole 7 penetrates the end of the male mold 4 up and down so that air passes from above to below and from below to above. Has become. A large number of the exhaust holes 7 are arranged along the outer edge with a diameter of 10 mm and an interval of 20 mm.

Here, it is required that the pressing process be performed quickly from the viewpoint of productivity. If the female die and the male die are quickly separated after pressing, air rapidly moves into the mold, and explosion due to the movement of air occurs. May occur, and this explosion may cause destruction of the pressed product. Therefore, an exhaust hole is formed to prevent this explosion. That is,
When removing the female mold and the male mold, the hot air is exhausted from the exhaust hole and the outside air enters, mitigating the rapid air movement and preventing the explosion due to the air movement when separating the female mold and the male mold. I do.

Although the embodiments of the present invention have been described above, the specific configuration of the present invention is not limited to the embodiments, and there are design changes and the like within a range not departing from the gist of the invention. This is also included in the present invention.

[0018]

As described above, in the disposable container / tool made of vegetable fiber according to the first aspect, the container / plant made of vegetable fiber, carbamide resin and melamine resin is used as a raw material.
Since the tool is formed, the plant fiber which has been conventionally disposed of can be effectively used.

The disposable container made of vegetable fiber according to claim 2
In the equipment, 60% to 90% of vegetable fiber, 7% to 35% of carbamide resin, and 3% to 10% of melamine resin are crushed and mixed, so that plant fiber which has been conventionally disposed of can be effectively used. Since plant fiber is the main raw material, it is naturally decomposed by microorganisms and does not cause environmental pollution.

The disposable container made of vegetable fiber according to claim 3
In equipment, in addition to carbamide resin, polymers of ethylene and carbon monoxide, vinyl-based ketone, styrene,
(Propylene or ethylene) polymers, polyolefins or polystyrenes, including photoactivators and photoresistors
Polyethylene containing antioxidant and light irradiation activator, polyolefin containing light irradiation activator, poly-3-hydroxyl butyric acid or poly-3-hydroxyl valeric acid, polycaprolactone, polyvinyl alcohol, ethyl acrylate and maleic anhydride Polymers, starch-filled plastics, cellulose acetate, gelatin, polylactic acid, and the like.

The disposable container made of vegetable fiber according to claim 4
In the manufacturing method of the utensil, vegetable fiber, carbamide resin, and melamine resin are pulverized finer than 60 meshes, and they are mixed and heat-molded. And the handling of the raw material becomes easy. Further, since the powdery raw material is directly pressed, the pressing time is shortened and the manufacturing process is simplified.

The disposable container made of vegetable fiber according to claim 5.
In the manufacturing method of the utensil, vegetable fiber 60% to 90%,
Carbamide resin 7% to 35%, melamine resin 3% to 10
% Of the mixture at a temperature of 105 to 210 ° C. and a pressure of 20 to 60 kg / cm 2 at a pressure of 20 to 60 kg / cm 2.
Since the press is repeated for several seconds to 30 seconds and the press is repeated several times, containers and utensils can be efficiently manufactured using plant fiber as a main raw material.

In the mold according to the sixth aspect, a raised ridge is formed along the outer edge of the upper end of the female mold, and a groove is formed along the outer edge of the lower part of the male mold, and the raised ridge is formed when the mold is closed. Since the grooves are fitted, the sealing pressure in the mold can be increased, and the occurrence of burrs on the outer edge of the container / tool can be prevented.

[Brief description of the drawings]

FIG. 1 is a plan view of a male mold.

FIG. 2 is a sectional view of a male mold.

FIG. 3 is a sectional view of a female mold.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Mold 2 Recess 3 Female 4 Male 5 Ridge 6 Groove 7 Exhaust hole

──────────────────────────────────────────────────続 き Continuation of the front page (56) References JP-A-10-324322 (JP, A) JP-A-10-272681 (JP, A) JP-A-55-90577 (JP, A) JP-A-10- 202690 (JP, A) (58) Fields investigated (Int. Cl. ⁷ , DB name) A47G 19/03 B65D 1/00

Claims (6)

(57) [Claims] 1. A disposable container / tool made of vegetable fiber, wherein a vegetable fiber, a carbamide resin, and a melamine resin are pulverized, mixed and heat-molded in a powder state . 2. The disposable container and utensil according to claim 1, wherein 60% to 90% of vegetable fiber, 7% to 35% of carbamide resin, and 3% to 10% of melamine resin are ground and mixed. 3. A polymer of ethylene and carbon monoxide, a polymer of a vinyl-based ketone, styrene, (propylene or ethylene), a polyolefin or polystyrene containing a light irradiation activator and a photoresistor, instead of the carbamide resin. Containing an agent and a light irradiation activator, polyolefin containing a light irradiation activator, poly-3-hydroxyl butyric acid or poly-3-hydroxyl valeric ac
3. The plant according to claim 1, wherein any one of id, polycaprolactone, polyvinyl alcohol, a polymer of ethyl acrylate and maleic anhydride, starch-filled plastic, cellulose acetate, gelatin, and polylactic acid is used. Fiber disposable containers and tools. 4. A method for producing a disposable container / tool made of plant fiber, comprising crushing a plant fiber, a carbamide resin, and a melamine resin into finer pieces than 60 meshes, mixing them, and heat molding. 5. A plant fiber of 60% to 90%, a carbamide resin of 7% to 35%, and a melamine resin of 3% to 10% are pulverized and mixed, and the temperature of the mold is set to 105 ° C. to 210 ° C., and 20 kg / g.
A method for producing a disposable container or tool made of vegetable fibers, comprising pressing at a pressure of cm2 to 60 kg / cm2 for 3 seconds to 30 seconds and repeating the press several times. 6. A mold comprising a container-shaped female mold and a male mold fitted to the female mold, wherein an exhaust hole is formed along an outer periphery of the male mold, A ridge is formed along the outer edge of the upper end, a groove is formed along the lower outer edge of the male mold, and the ridge and the groove are fitted when the mold is closed to seal the inside of the mold and reduce the burr. A mold characterized by preventing occurrence.