JP2002339299A - Food container - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a food container having good preservability on contents placed in it, less expensive, safe and harmless, biodegradable in soil as it is when wasted and generating no harmful matter even by incineration. SOLUTION: The food container is prepared by subjecting a mixed material consisting of mixed fibers prepared by mixing true grass fiber and plant fiber of a Lagminosae plant like Lespedez or the like each in uncooked state as it is, and unboiled bamboo fibers to a pressing-compressing-molding treatment. Alternatively, a mixed material is prepared by further adding small amounts of water repelling agent and a paper strength-increasing agent to that mixed material, and this mixed material is subjected to a pressing-compressing-molding treatment.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a non-wood fiber as a main material, which suppresses the generation of mold when used for food packaging and tableware, and protects the food. The present invention relates to a food container that can solve a problem.

[0002]

2. Description of the Related Art As for food packaging and simple disposable tableware, trays, cups, bowl-shaped containers, and the like, which are formed from a foamed synthetic resin sheet material made of styrene resin, are widely used. In addition, as a food container, for example, a container formed by molding paper laminated with a synthetic resin sheet into a predetermined shape, such as a coffee cup, is also partially used.

[0003]

A conventional food container made of such raw materials has no bactericidal or antifungal properties, so if the packaged foods are frequently used, raw foods such as side dishes are required. In the case of the food of the above, there is a disadvantage that the product value is spoiled in a short period of time and molds are generated, thereby impairing the commercial value. In particular, among the molds, blue mold, black mold, black mold, and the like have a strong mold-producing property, and it was difficult to prevent the generation of mold with respect to these three molds. In addition, in the case of food containers made of laminated paper, the paper used as the main material is made of wood-based pulp. When disposing of unnecessary food containers, for example, if they are buried in the soil at a landfill site, etc., they will not rot for a long time, and when incinerated, they will generate harmful gases. Had a problem to be solved that caused a pollution problem.

Therefore, in the present invention, in order to solve the above-mentioned problems in packaging, protecting and preserving food, mass production is carried out by using inexpensive plant materials and unused materials, and bacteria and fungi are produced. The product price is low, tough and safe and harmless, and it is biodegradable even if it is discarded in the soil as it is, and harmful even if it is incinerated. An object is to provide a food container that does not generate any substance.

[0005]

Means of the present invention taken to achieve the object will be described in terms of common terms with the description of the embodiments. The food container of the first invention is composed of grass fiber and hagi. A mixed material obtained by mixing non-boiled plant fibers of the leguminous plant fibers and unboiled bamboo fibers is press-molded.

[0006] The seedling pot for root crops according to the second invention comprises a mixed fiber obtained by mixing a grass fiber and a leguminous plant fiber such as a goat without boiling, and a small amount of unboiled bamboo fiber. And a pressure-compression molding of a mixed material obtained by mixing the water repellent and the paper strength enhancing material.

[0007]

DESCRIPTION OF THE PREFERRED EMBODIMENTS In order to carry out the above-mentioned food container of the present invention, the plant material used is a raw fiber obtained from bamboo stems, stems, skins, cores and the like having antibacterial properties by about 7%. % By weight to 50
A mixture material obtained by mixing approximately 50% to 93% by weight of a mixed fiber obtained by mixing approximately 50% to 93% by weight of a plant fiber of a grass family such as reeds and a fiber of a hedge, and molding the mixture at a molding temperature of 180 ° C. or higher. , 20
About 0 ° C, molding pressure about 3Kg / cm ² , molding time 25S
It is molded under conditions of about ec. In this case, even if a binder corresponding to the sizing agent in paper is not added, the fibers are bound to each other by hydrogen bonding, and a predetermined shape as a container is maintained. If the container requires strength, increase the bamboo fiber content. The content is suitably around 30%.
When the food container is a low-water food such as nuts and dried confectionery, the mixed fiber may be used.
In a container into which water or hot water is poured, such as a cup for coffee, a small amount (3 to 5% by weight) based on the total weight of the above various fibers
Water repellent and paper strength enhancer. As the water repellent, a silicon-based resin, a rosin derivative-based resin, and the like are suitable, and as the water resistance and paper strength enhancer, a polyacrylamide-based resin and the like are suitable.

As a means for molding a food container, as described above, bamboo fiber and boiled mixed fiber may be directly heated under pressure by a mold having a predetermined shape, but these materials are suspended in water. Needless to say, it may be used as a means for making a slurry, making a paper using a mesh net, and pressing. As described above, bamboo raw fibers in the material have antibacterial and antifungal properties, so bacteria and fungal spores that have accidentally adhered while floating in the air or from other objects are inhibited from growing and are included. Has the effect of protecting foods from decay and damage.

The food container of the present invention has a water adjusting power over a wide range of 7% to 25%, adsorbs water vapor when the humidity in the surrounding air increases, and reduces the humidity when the humidity decreases. It has the effect of automatically adjusting to a humidity suitable for maintaining the normal state of the contents by discharging. Therefore, when used as a container, it can withstand temporary drying of the outside air or protect foods from excessive humidity.

[0010] The molded food container is used not only as a packaging container for fish, meat, other fresh foods, dried foods, lunches, etc., but also as a simple disposable tableware for ramen cups, coffee cups, udon, bowls and the like. Can be.

[0011] Since a raw material is used without discarding it until now, it is possible to reduce the material cost and reduce the manufacturing cost. In addition, even when disposed after use, low-temperature incineration is possible, so that the incinerator is not damaged and no dioxin is generated. Further, even when the soil is directly discarded and buried in the soil, it is biodegraded by bacteria and enzymes in the soil to become a fertilizer, which contributes to soil improvement and environmental sanitation purification.

[0012]

DESCRIPTION OF THE PREFERRED EMBODIMENTS Various embodiments of the present invention will be described below with reference to the description of the embodiments of the invention and the drawings. FIG. 1 is a perspective view showing the appearance of the first embodiment, and FIGS.
FIG. 4 is a perspective view showing the appearance of the third embodiment, a longitudinal vertical sectional view showing the state of use, and FIG. 4 is a perspective view showing the appearance of the third embodiment.

First Embodiment A first embodiment is a tray-shaped container used for packaging relatively dry food. About 20% of bamboo fiber, about 40% of reed fiber and about 40% of hagi fiber are mixed to form a mixed material for molding. This mixed material is heated at a temperature of 200 ° C. and a pressure of 3 kg / cm ² under the conditions of
Mold over 4 seconds. The fibers are bonded to each other by hydrogen bonding, and maintain a predetermined shape as a tray. In the present embodiment, the mixed material is made into a sheet shape, and in the first molding, a burr-like margin remains around the opening of the container. Therefore, the margin is removed by trimming by the second finishing molding. . FIG. 1 shows the appearance of this embodiment.

Second Embodiment The second embodiment is a tray-shaped container used for packaging foods having relatively high moisture content such as meat. About 20% of bamboo fiber, about 40% of reed fiber and about 40% of hagi fiber are mixed, and 2% of polyacrylamide resin is added as a water-resistant and paper-strengthening agent. I do. This mixed material was heated at a temperature of 200 ° C. and a pressure of 3 kg /
Molding is performed for 24 seconds under the condition of cm ² . The fibers are bonded to each other by hydrogen bonding, and maintain a predetermined shape as a tray. Also in this embodiment, the mixed material is formed into a sheet and a product is formed by molding twice. FIG. 2 shows the appearance of this embodiment.
FIG. 3 shows the state during use. Although not shown in the figure, a lunch container can be made by simply changing the shape by using the same material and molding in the same manner as in the second embodiment.

Third Embodiment A third embodiment is a disposable coffee cup used for a vending machine or the like. About 30% by weight of bamboo fiber, about 35% by weight of reed fiber and about 35% by weight of goat fiber, 2% by weight of polyacrylamide resin as a water-resistant and paper-strengthening agent, and silicone as a water-repellent agent A water repellent is mixed at 3% by weight to obtain a mixed material for molding. In the present embodiment, the mixed material is suspended in water to form a slurry, the paper is made into a roughly container shape by a sieving screen, and then molded at a temperature of 200 ° C. and a pressure of 3 kg / cm ² for 24 seconds. FIG. 4 shows the appearance of this embodiment. C is a container body. In addition, in a disposable cup for a coffee set that is sold as a pack with coffee beans and filters, not for a vending machine, as shown by an imaginary line in FIG. I do. Also, it goes without saying that a container for noodles and a container for bowls can be implemented by using the same material as in the third embodiment and molding in the same manner.

The embodiments which are considered to be representative of the present invention have been described above. However, the present invention is not necessarily limited to the structures of the embodiments, but has the above-mentioned constitutional requirements according to the present invention, and The present invention achieves the object of the present invention and can be appropriately modified and implemented within a range having the following effects.

[0017]

The food container according to the present invention is formed by mixing a small amount of a water repellent and a paper strength agent with a mixed material comprising bamboo fiber, reed fiber and fiber of a goat, etc. The bamboo fiber inside has antibacterial and antifungal properties, so bacteria and fungal spores that have accidentally adhered while floating in the air or from other objects are inhibited from growing, and the stored food is not rotted or damaged. Has the effect of protecting.

In addition, it has a wide range of water adjusting power, and when the humidity in the surrounding air increases, it adsorbs water vapor and lowers the humidity.
When the humidity decreases, the adsorbed water vapor is released and the inside of the container is automatically adjusted to an appropriate humidity. Therefore, when used as a container, it has the effect of withstanding temporary drying of the outside air or protecting the food from excessive humidity.

Since the raw material is a material that has been discarded without being used until now, it is possible to reduce the material cost and reduce the manufacturing cost. In addition, even when disposed after use, low-temperature incineration is possible, so that the incinerator is not damaged and no dioxin is generated. Therefore, in combination with the above-mentioned biodegradation in soil, the present invention has an effect of contributing to purification of environmental hygiene.

[Brief description of the drawings]

FIG. 1 is a perspective view showing an outer shape of a first embodiment of the present invention.

FIG. 2 is a perspective view showing an outer shape of a second embodiment.

FIG. 3 is a longitudinal cross-sectional view in the longitudinal direction of the same use state.

FIG. 4 is a perspective view showing an outer shape of a third embodiment.

[Explanation of symbols]

 C Container body 1 Stored goods 2 Packing sheet 3 Handle

 ──────────────────────────────────────────────────続 き Continued on the front page F term (reference) 3E033 AA08 AA10 BA10 BA30 BB01 CA03 DD01 FA01 4L055 AA05 AA20 BF06 EA32 FA30 GA05

Claims (4)

[Claims] 1. A food product obtained by press-compression-molding a mixed material comprising a mixture of unboiled bamboo fiber and a mixed fiber obtained by mixing a botanical fiber such as a grass fiber and a leguminous plant fiber. container. 2. A small amount of a water repellent and a paper-strength enhancing material are mixed with a mixed fiber obtained by mixing a grass fiber and a leguminous plant fiber such as a goat and the like without boiling, and an unboiled bamboo fiber. A food container obtained by press-compression molding the mixed material. 3. The mixing ratio of bamboo fiber is 7% by weight or more and 50% or more.
The food container according to claim 1, wherein the content is not more than% by weight. 4. The food container according to claim 1, wherein the weight mixing ratio of the grass fiber and the leguminous plant fiber such as hag is approximately equal.