JPH08143084A - Food distribution container - Google Patents

Abstract

PURPOSE: To obtain a product mainly made of pulp to be used for distribution of food, for example, in particular for a food distribution container having functions. CONSTITUTION: A distribution container 1 for food, etc., contains pulp fiber P as major raw material and an additive F having reinforcement effect and is molded of at least the pulp fiber P as major raw material. Raw material solution containing the pulp fiber P is added with the additive F having reinforcement effect and molded into the container 1. Or, after the pulp fiber P is molded into a specified shape, the additive F is applied to the molded product from outside by infection, coating or immersion. The additive F having reinforcing effect is any one or two or more of chitin F1 , chitin fiber F2 , chitosan F3 and chitosan fiber F4 .

Description

Detailed Description of the Invention

[0001]

[Object of the invention]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a papermaking product mainly composed of pulp raw materials for use as a distribution material such as food, and more particularly to a distribution container for food or the like having high strength.

[0002]

BACKGROUND OF THE INVENTION In the past, most of the distribution containers for packing meat, vegetables, side dishes, etc. in retail stores such as supermarkets were made of Styrofoam or various synthetic resin films, but recently, as recycled paper. Paper that can be recycled is being used. Since such a paper distribution container is inferior in strength to the above-mentioned ones, various attempts have been made to improve the strength. For example, by increasing the paper thickness or forming ribs to structurally respond, or after mixing plastic fibers,
There is also a method in which different materials are mixed and mixed, such as fusion of these with pulp fibers at the time of drying and pressing.

It has also been attempted to mix flax, which is a harmless natural material, in consideration of the fact that the object to be packaged is a food, but the flax fiber itself has a large strength, but it is limited to pulp fiber and There was almost no combined effect of the above, and therefore, the improvement in strength was insufficient and there was still room for improvement.

In addition, many attempts have been made to improve the strength of the paper material itself, and particularly in the paperboard where the papermaking conditions are relatively stable, there are some that can exhibit the strength required for a food distribution container. Not that it cannot be configured. However, when such a paperboard is used as a starting material, the shape of the container is limited to a simple one within a range in which press working is allowed because the container shape is formed by heat pressing.

[0005]

[Technical Items Attempted to Develop] The present invention has been made from such a background, and is premised on molding so that even a complicated shape can be manufactured, and a high-strength material having no hygiene problem By molding with pulp fiber,
This is an attempt to develop a new distribution container for foods and the like that does not require secondary processing to improve strength.

[0006]

Configuration of the Invention

[Means for Achieving the Object] That is, a distribution container for foods, etc. according to claim 1 comprises a main raw material containing pulp fiber and an additive having a strength improving action, and at least pulp fiber in the main raw material is molded. It is characterized by consisting of.

In addition to the above requirements, the distribution container for food and the like according to claim 2 is characterized in that an additive having a strength improving action is internally added to a raw material liquid containing pulp fibers, and papermaking is performed. To do.

Further, in addition to the requirements of the above-mentioned claim 1, the distribution container for foods and the like according to claim 3 has the above-mentioned strength improving action by press-fitting, coating or dipping after molding pulp fibers into a certain shape. It is characterized by the external addition of additives.

Furthermore, in addition to the above requirements, the distribution container for food etc. according to claim 4 is characterized in that the additive having the strength improving action is any one or more of chitin, chitin fiber, chitosan or chitosan fiber. Is characterized by.

[0010]

According to the invention described in claim 1 of the present application, the main raw material comprises pulp fibers and an additive having a strength improving action, and at least pulp fibers in the main raw material are molded. Therefore, the distribution container has high strength, and a distribution container having a complicated shape can be manufactured.

Further, according to the invention of claim 2 of the present application, the raw material liquid containing pulp fibers is internally added with the additive having the action of improving the strength, and the papermaking process is carried out. Filler enters evenly.

Further, according to the invention of claim 3 of the present application, after the pulp fiber is molded into a fixed shape, the additive having the strength improving effect is externally added by press-fitting, coating or dipping, so that it is for distribution. Filler is concentrated near the surface of the container.

Further, according to the invention of claim 4 of the present application, since the additive having the strength improving action is chitin, chitin fiber, chitosan or chitosan fiber, the distribution container has high strength.

[0014]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS First, an apparatus for manufacturing the distribution container 1 of the present invention will be schematically described with reference to the drawings, and the distribution container 1 of the present invention will be schematically described while describing the operating state of the apparatus. explain. A state in which a filler F, which will be described later, is mixed in the raw material liquid M in advance is defined as internal addition. Further, the solid component having a predetermined shape left on the carrier net 13 described later is referred to as a base material 5, and the dried component is referred to as a papermaking product 3. Then, a mode in which the filler F is integrated after the base material 5 or the paper product 3 is formed is defined as external addition.
Incidentally, other conventionally known fillers may be added to the raw material liquid M. Therefore, the papermaking product 3 is synonymous with the distribution container 1 in the case of internal addition, and becomes the distribution container 1 in the form after the filler F is added in the case of external addition.

As shown in FIG. 2, the papermaking apparatus 2 uses a raw material liquid M.
This is an apparatus for extracting the liquid component L from the paper and extracting the base material 5. Reference numeral 10 denotes a papermaking cup, which is a main member of this, in which the base material 5 is made. The papermaking cup 10 has an appropriate volume selected according to the specifications of the papermaking product, and the raw material liquid M is charged therein. A pipe is connected to the lower end of this thing, and by an appropriate suction device connected to the pipe, or by natural flow,
The liquid component L is discharged. The papermaking cup 10 has a supporter 12 having a large number of liquid drain holes at the bottom thereof. This has substantially the same shape as the carrier net 13 which is the type of the base material 5, and the carrier net 13 is held on the supporter 12.

In order to obtain the base material 5 using such a papermaking apparatus 2, first, a dispersion liquid of pulp fibers P is used as a raw material, and a predetermined amount of the dispersion liquid is taken out and put into the papermaking cup 10. Then, the pulp fibers P are extracted on the carrier net 13 to form a web-like layer having a constant thickness, and the liquid component L passes through the mesh of the carrier net 13 and flows further downward. At this time, the extraction speed can be increased by performing forced suction from below. When the flow-down of the liquid component L is completed in this way, the base material 5 which is a solid component of a predetermined shape remains on the carrier net 13, and this is transferred to the drying step at this position or by a transfer device (not shown), and appropriately. The papermaking product 3 is obtained by performing the drying treatment by the above means. The above is a schematic description of the method for manufacturing the distribution container 1 of the present invention, and the details will be described below for each mode.

First, the manufacturing process of the distribution container 1 defined in claims 1 and 2 will be described. (I) Internal Addition of Filler Raw Material Liquid The raw material liquid M used in this method is a dispersion liquid of pulp fibers P and filler F. Incidentally, the state of this raw material is called the state of internal addition of the filler F. Further, as defined in claim 4, the additive F is one or more of chitin F ₁ , chitin fiber F ₂ , chitosan F ₃ or chitosan fiber F ₄ . Of course, it does not matter if it includes a filler which is conventionally added in general. Chitin F ₁ is the main component of shells such as shrimp and crab.
To obtain this, first wash the shells of shrimp, crab, etc. with water, treat with dilute hydrochloric acid to remove inorganic substances, and then boil with dilute alkali to remove proteins. Then, the remaining precipitate is filtered, washed with water and dried to obtain chitin F ₁ . A fiber is obtained by dissolving it in chitin F ₁ methylacetamide and lithium chloride and extruding it through a nozzle into a coagulating liquid such as water or alcohol. This fiber is cut into a suitable length and used as chitin fiber F ₂ . Also chitin F
_{When 1} is treated with a concentrated alkaline solution, the acetyl group is removed and chitosan F ₃ is obtained. Chitosan F _{3 is} also made into a solution and spun into chitosan fiber F ₄ .

Natural Flowing In the papermaking process, first, the raw material liquid M is charged into the papermaking cup 10 and allowed to flow naturally. Then, as shown in FIG. 3A, the pulp fibers P having a high specific gravity are deposited on the carrier net 13, and at the same time, a part of the filler F enters the voids or the porous space of the pulp fibers P to form the base material 5. Such a state is the case where chitin F ₁ or chitosan F ₃ is used, and in the case of chitin fiber F ₂ and chitosan fiber F ₄ , it is entangled with pulp fiber P to form substrate 5.

Forced suction When such a natural flow is continued, the filler F is deposited on the base material 5 as shown in FIG. 3 (b). In this state, stop the natural flow and forcefully suck from below. As a result of this forced suction, as shown in FIG. 3C, the filler F, especially chitin F ₁ or chitosan F ₃ , deposited on the base material 5 is further filled in the voids or the porous space of the pulp fiber P to make the base material 5 highly dense. To do.
By the way, excessive suction causes the filler F to pass through the base material 5 and pass through the eyes of the carrier net 13 to flow downward. Therefore, the suction needs to be moderate.

Natural flow Finally, after the forced suction is stopped, the natural flow is further continued. Due to this natural flow, as shown in FIG. 3D, the filler F is densely packed or laminated on the surface of the base material 5.
This is transferred to the drying step at this position or by a transfer device (not shown), and dried by an appropriate means to obtain the distribution container 1 shown in FIG. During this drying, the bond between the pulp fibers P is strengthened by the coagulating action of the chitin F ₁ , the chitin fiber F ₂ , the chitosan F ₃ , the chitosan fiber F _4, etc. That is, the chitin fibers F ₂ and the chitosan fibers F ₄ are entangled with the pulp fibers P and bonded to the pulp fibers P, and the chitin F ₁ and the chitosan F ₃ are between the pulp fibers P or between the pulp fibers P and the chitin fibers F ₂ or the pulp fibers. It strengthens the bond between P and the chitosan fiber F ₄ .

Next, the distribution container 1 and the manufacturing method thereof defined in claims 1 and 3 will be described. (ii) External addition of filler F The raw material liquid M used in this method is a dispersion of pulp fibers P, and the filler F is not internally added. Further, as defined in claim 4, the filler F is one or more of chitin F ₁ , chitin fiber F ₂ , chitosan F ₃ or chitosan fiber F ₄ . Of course, it does not matter that the filler other than the filler F, which is conventionally added, is included.

First, in the papermaking process, the liquid component L is discharged by allowing the raw material liquid M to flow naturally or by forced suction. Then, the pulp fibers P are deposited on the carrier net 13, and the pulp fibers P alone form the base material 5. This is transferred to a drying step at this position or by a transfer device (not shown), and a papermaking product 3 is obtained by performing a drying process by an appropriate means.

First, two methods of press-fitting the filler F into the base material 5 or the papermaking product 3 will be described. (a) Press-fitting 1 First, as shown in FIGS. 4 (a) and 4 (b), a base material 5 is formed from pulp fibers P. Next, as shown in FIG. 4C, when the dispersion liquid of the filler F is put into the papermaking cup 10 and forced suction is performed from below, the filler F deposited on the base material 5 as shown in FIG. 4D. In particular, chitin F ₁ or chitosan F ₃ is filled in the voids or the porous space of the pulp fiber P to make the base material 5 highly dense. When the substrate 5 is dried, the distribution container 1
Can be obtained. Incidentally, excessive suction causes the filler to pass through the base material 5 and pass through the mesh of the carrier net 13 to flow downward as in the previous embodiment. Therefore, it is necessary to appropriately suction. Further, in the example shown in FIG. 4, the opening of the base material 5 faces downward, but since it is the opening side that requires high strength action in the distribution container 1, the opening is directed upward. It is preferable to perform the forced suction described above.

Next, the other press-fitting method will be described. (b) Press-fitting 2 First, as shown in FIGS. 5A and 5B, the base material 5 is formed from the pulp fibers P. Then, the substrate 5 is transferred to another device equipped with suction means. After that, as shown in FIG. 5C, when the powdered filler F is sprayed onto the opening surface of the base material 5 and at the same time the powder F is forcibly sucked from below, the filler F sprayed on the base material 5 becomes the pulp fiber P. The base material 5 is filled with high density as shown in FIG. 5D by filling the voids and the porous space. And when this is dried, the distribution container 1 is obtained. During this drying, the bond between the pulp fibers P is strengthened by the coagulating action of the chitin F ₁ , the chitin fiber F ₂ , the chitosan F ₃ , the chitosan fiber F _4, etc. That is, the chitin fibers F ₂ and the chitosan fibers F ₄ form a fiber layer on the surface layer of the base material 5, and the chitin F ₁ and the chitosan F ₃ are formed between the pulp fibers P, between the pulp fibers P and the chitin fibers F ₂ , or the pulp. This strengthens the bond between the fiber P and the chitosan fiber F ₄ . The chitin fiber F ₂ and the chitosan fiber F ₄ used at this time are
The length should be such that the nozzle is not clogged.

Next, a method of applying the filler liquid PF in which the filler F is dissolved to the papermaking product 3 will be described. (c) Application First, the base material 5 is formed of only the pulp fiber P, and the paper product 3 is obtained by drying the base material 5. Next, as shown in FIG. 6 (a), a filler liquid PF in which a powdered filler F is dissolved in water is applied to the opening surface or the entire surface of the papermaking product 3 by a brush, a spray, or the like. The voids and the porous space of P are filled and remain in the voids and the porous space of the pulp fiber P by the evaporation of water as shown in FIG. 6 (b), and during this drying, chitin F ₁ , chitin fiber F ₂ , chitosan F ₃ , The chitosan fiber F _{4 and the} like are solidified to strengthen the bond between the pulp fibers P, so that a high-strength distribution container 1
Is obtained. Of course, if such coating is performed a plurality of times, the adsorption of the filler F can be further ensured.

Next, a method of immersing the papermaking product 3 in the filler liquid PF in which the filler F is dissolved will be described. (d) Immersion First, the base material 5 is formed only from the pulp fibers P, and the base material 5 is dried to obtain the paper product 3. Next, as shown in FIG. 7 (a), when the papermaking product 3 is immersed in a filler liquid PF in which a filler F is dissolved in water, the filler F is filled in the voids or the porous space of the pulp fiber P, and is taken out and dried. Due to the evaporation of water, the pulp fibers P remain in the voids and porous spaces, and during this drying, chitin F ₁ , chitin fibers F ₂ , chitosan F ₃ ,
The coagulation action of the chitosan fiber F _{4 and the} like strengthens the bond between the pulp fibers P, so that a high-strength distribution container 1 can be obtained. Of course, if this kind of soaking is repeated several times, the filler F
Can be surely adsorbed. In addition, at the time of mass production,
As shown in (b), a part of the orbit of the conveyor is filled with the filler liquid P.
If a process of dipping in a tank containing F is used, dipping can be performed efficiently.

[0027]

[Other Modifications] The distribution container 1 described in the above embodiment has a high strength action and thus protects the food or the like as the content. In order to prevent the odor from adhering, the water-impermeable and breathable sheet may be coated on the distribution container 1 described in the above embodiment. In addition to foods, the contents can be horticultural seeds and fresh products such as flowers.

[0028]

According to the invention described in claim 1 of the present application, the main raw material comprises the pulp fiber P and the additive F having a strength improving action, and at least the pulp fiber P in the main raw material is molded. Since it is molded, the distribution container 1
Has high strength.

According to the invention of claim 2 of the present application, since the raw material liquid M containing the pulp fiber P is internally added with the additive F having a strength improving action, the papermaking process is carried out. Filler F uniformly enters inside 1. As a result, the distribution container 1 has high strength.

Further, according to the invention of claim 3 of the present application, after the pulp fiber P is molded into a certain shape, the additive F having the strength improving action is externally added by press fitting, coating or dipping. The filler F is concentrated near the surface layer of the distribution container 1. As a result, the surface layer becomes a layer containing a large amount of the filler F, and the distribution container 1 has high strength.

Further, according to the invention of claim 4 of the present application, since the additive F having the strength improving action is chitin F ₁ , chitin fiber F ₂ , chitosan F ₃ or chitosan fiber F ₄ , these additives Due to the coagulation action, the distribution container 1 has high strength.

[Brief description of drawings]

1 is a perspective view showing a partially broken view of a distribution container of the present invention, and an enlarged perspective view showing a part of a broken surface thereof.

FIG. 2 is a vertical cross-sectional side view showing a papermaking apparatus used in a manufacturing process of a distribution container of the present invention in a broken manner, and a vertical cross-sectional side view showing an enlarged part of a broken surface thereof.

FIG. 3 is an explanatory diagram showing, step by step, how a distribution container is manufactured from a raw material liquid to which a filler is internally added.

FIG. 4 is a vertical cross-sectional side view showing one of the examples in the case of externally adding the filler, in which a method of press-fitting the filler into the base material during the papermaking is stepwise.

FIG. 5 is a vertical cross-sectional side view showing stepwise a method of press-fitting the filler into the base material by spraying.

FIG. 6 is a vertical sectional side view showing stepwise a method of externally adding a filler to a substrate by coating.

FIG. 7 is a vertical side view showing two examples in which the filler is externally added to the base material by dipping.

[Explanation of symbols]

1 Distribution Container 2 Paper Making Device 3 Paper Making Product 5 Base Material 10 Paper Making Cup 12 Supporter 13 Carrier Net F Filler F ₁ Chitin F ₂ Chitin Fiber F ₃ Chitosan F ₄ Chitosan Fiber M Raw Material Liquid L Pulp Fiber PF Filler Liquid

Claims (4)

[Claims] 1. A distribution container for food or the like, characterized in that the main raw material comprises pulp fibers and an additive having a strength improving action, and at least pulp fibers in the main raw material are molded. 2. A container for distribution of foods, etc. according to claim 1, wherein an additive having a strength improving action is internally added to a raw material liquid containing pulp fibers and the paper is manufactured. 3. A container for distribution of foods, etc. according to claim 1, wherein the pulp fiber is molded into a fixed shape, and then the additive having the strength improving effect is externally added by press fitting, coating or dipping. . 4. The additive having a strength improving effect is any one or a plurality of chitin, chitin fiber, chitosan or chitosan fiber.
A distribution container for the food or the like described in 2 or 3.