JPH10166507A - Multilayer sheet - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a multilayer sheet for sanitarily maintaining storage environment of food or the like by sufficiently performing both solution absorbing operation of nonwoven fabric and antibacterial operation of functional material charged in a sheet. SOLUTION: A nonwoven fabric 4 obtained by adhesively laminating nonwoven fabrics 13, 24 having different fiber densities is disposed to form a space 7 between the layer 4 and an adhesive layer 3 on a sheet-like base material 2 having a metal thin film layer 10 via the layer 3 so that dense nonwoven fabric 13 having high fiber density is disposed at the material 3 side and coarse nonwoven fabric 14 having low fiber density is disposed at a front surface of the sheet. Powder-like or chip-like material 8 having sanitary operations such as antibacterial, mothproofing, deodorizing, and moisture absorbing is charged in the space 7, and thermally press bonded. As the material 8, functional material containing herb vegetable component or comminuted bincho charcoal can be used.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention is laid on a kitchen unit storage shelf, a food shelf, a refrigerator, a chest, a shoe box and other desired places for antibacterial, insect repellent, deodorizing, deodorizing, and dirt prevention. The present invention relates to a multi-layer sheet that can be used.

[0002]

2. Description of the Related Art When a dry matter, a cooking material, a seasoning, or the like is put in a food storage shelf, it may rot due to the temperature and humidity, and germs and mold may be propagated to generate an odor. Also, fresh foods such as vegetables and seasonings in the refrigerator storage shelf,
In the case where beverages or the like are stored, vegetable dregs, solutions that have flowed down from the spouts of seasoning containers and beverage containers adhere to the shelf boards, and the shelf boards may be soiled and give off odors. These odors and stains
The problem can be solved by frequent cleaning with good ventilation. However, it is difficult to clean each of the shelves such as the refrigerator storage shelf, and it is troublesome. Therefore, in order to keep the food preservation environment hygienic, a multi-layer sheet 41 as shown in FIG. 4 is used by being laid on each shelf.

The multilayer sheet 41 has a space 45 formed between a nonwoven fabric 44 and a substrate 42 via an adhesive layer 43 on one side of a sheet-shaped synthetic resin substrate 42 on which aluminum is deposited. It is formed by filling a predetermined amount of a material 46 having an action of antibacterial, insect repellent, deodorizing, moisture absorbing and the like pulverized in a powdery or chip form in the space portion 45 by appropriately providing and polymerizing and bonding, and is formed from food etc. The non-woven fabric 44 absorbs and retains the flowing water and oil to prevent adhesion to the shelf,
The sixth component is transmitted through the non-woven fabric 44 and diffused around the sheet, so that the propagation of various bacteria and the generation of an odor can be suppressed.

[0004]

In order to effectively exhibit the antibacterial and deodorizing effects of the multi-layer sheet 41, the particle size of the material 46 to be filled is reduced, and the ambient air around the material 46 is reduced. It is preferable to set such that the contact area with the contact hole becomes large. In this case, if the particle diameter of the raw material 46 is small, the raw material 46 may overflow from the fiber gap of the nonwoven fabric 44 to the outside of the sheet. Must be used.
However, when the fiber density is increased, there is a problem that the water absorption and oil absorption of the nonwoven fabric 44 decrease, and it becomes impossible to sufficiently absorb the water and oil components flowing out of foods and seasoning containers. That is, if the particle size of the material 46 is reduced in order to improve the antibacterial and deodorizing effects, the nonwoven fabric 44 having a high fiber density must be used, so that the solution absorbing effect is deteriorated. Non-woven fabric 44 for good
If the fiber density is lowered, a material 46 having a large particle size must be used, so that sufficient effects such as antibacterial and deodorizing cannot be obtained, and both the effects of the nonwoven fabric 44 and the material 46 can be fully exhibited simultaneously. I couldn't do that.

Accordingly, the present invention has been made in view of the above-mentioned problems of the prior art, and is intended to sufficiently exhibit both the function of absorbing the solution by the nonwoven fabric and the function of the functional material filled in the sheet, such as the antibacterial effect. It is an object of the present invention to provide a multilayer sheet capable of maintaining a preservation environment such as food in a sanitary manner.

[0006]

Means for Solving the Problems To solve the above-mentioned problems, the multilayer sheet of the present invention comprises a sheet-like substrate having a metal thin film layer, a non-woven fabric laminated via an adhesive layer, and a part of the non-woven fabric. Is adhered, a space is formed inside the non-woven fabric of the non-adhered portion, and the space is formed by filling a powdery or chip-shaped material having a sanitary action such as antibacterial, insect repellent, deodorizing, deodorizing, and absorbing moisture. In addition, the nonwoven fabric is formed by laminating and bonding nonwoven fabrics having different fiber densities, and is arranged such that the higher fiber density is on the substrate side and the lower fiber density is on the sheet surface side. Things. As a powdery or chip-like material, a functional material containing herbal plant components or sawdust containing bincho charcoal, activated carbon, hinokitiol, etc. is used as an antibacterial agent, an insect repellent, a deodorant, a fragrance, etc. be able to.

[0007]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS Preferred embodiments of the present invention will be described with reference to the drawings. FIG. 1 is a plan view of an embodiment of the present invention, and FIG.
FIG. 2 is an enlarged cross-sectional view taken along the line II-II.

[0008] The multilayer sheet 1 is formed by laminating a nonwoven fabric layer 4 having valleys or flat portions 6 between a number of peaks 5 on a substrate 2 having a metal thin film layer via an adhesive layer 3. At the same time, the valley portion to the flat portion 6 are thermocompression-bonded to the base material 2, and antibacterial, insect repellent, deodorizing, and moisture absorption are provided in a space 7 formed between the surface of the base material 2 and the crest 5 of the nonwoven fabric layer 4. It is formed by filling a powdery or chip-shaped material 8 having a sanitary action such as.

The base material 2 is formed by depositing aluminum on a polyethylene terephthalate (hereinafter referred to as PET) layer 9 and laminating an aluminum layer 10 with an appropriate thickness, and further through an adhesive layer 11 such as a polyethylene resin.
2 are formed by bonding. The aluminum layer 10 was adopted as the metal thin film layer because aluminum has excellent heat resistance and gas barrier properties.
The layer 9 is laminated because PET has excellent heat resistance, so that aluminum has good vapor deposition properties, has appropriate strength and tension, and has high transparency, which makes the laminated aluminum stand out, and makes the sheet appearance beautiful. Because it can be done. The kraft paper 12 is adhered to the PET layer 9.
In addition to reinforcing the aluminum layer 10, the heat and pressure bonding of the nonwoven fabric layer 4 is ensured and facilitated, and wrinkles and bending of the sheet are prevented from occurring. The thickness of each layer is, for example, about 12 to 50 μm for the PET layer 9, about 0.4 to 0.6 μm for the aluminum layer 10, and about 15 for the adhesive layer 11.
ク ラ フ ト 30 μm, and the kraft paper 12 can be about 15-60 μm. Each layer may be provided thicker than the above, and the entire substrate 2 may be formed into a sheet having a thickness of, for example, 150 μm or more.

The adhesive layer 3 is formed by applying or co-extruding a material such as a polyolefin resin, a urethane resin, a synthetic rubber, or an ethylene-vinyl acetate copolymer resin on the base material 2. The thickness of the adhesive layer 3 is, for example, 15 to 30 μm.
m, preferably about 20 μm. The adhesive layer 3 may be formed on the entire surface of the base material 2 or may be formed only on the portion where the nonwoven fabric layer 4 is bonded.

[0011] The nonwoven fabric layer 4 has two fibers having different fiber densities.
The woven fabrics 13 and 14 are overlapped and made of polyethylene resin, etc.
They are bonded together by an adhesive. Both nonwoven fabrics 1
3, 14 are, for example, polyester, polypropylene, etc.
Made of thermoplastic resin, dense nonwoven fabric 13 is melt blown
The yarn formed to a fiber diameter of about 1 to 10 μm by the method
Attached range 10 to 300 g / m^Two, Preferably 10 to 20 g
/ M ^TwoAnd the coarse nonwoven fabric 14 is spun
Yarn formed to a fiber diameter of about 10 to 50 μm by the sanding method
10 to 300 g / m^Two, Preferably 50 to
70 g / m^TwoDeposited at a lower density than the dense non-woven fabric 13
And spray the adhesive on the polymerized surfaces to overlap each other.
And is formed by laminating them into an integral sheet. Mino
Other than above if oil absorbency and gas permeability are good
Materials and manufacturing methods can be used.
One of the layers of non-woven fabric has high fiber density and gas permeability
Good, while the other has better absorption of moisture or oil.
It is preferred that the layer be good. As shown
The non-woven fabric layer 4 is, for example, about 25 mm long on the roll surface,
Protrusions 3-5mm wide and 1-3mm high are arranged side by side
Using a roll made of
14 is a convex surface, and the dense nonwoven fabric 13 is a concave surface.
A large number of peaks 5 are arranged in rows and columns, and the surroundings are troughs or flats.
The surface is unevenly processed so as to be 6.

The powdery or chip-like material 8 is made of antibacterial, insect repellent,
It is possible to use a hygienically preferable functional material having an action such as deodorization, deodorization, moisture absorption, and aroma. For example, herbs and materials containing essential oils of herbs are excellent in bactericidal, bacteriostatic and antifungal properties, and are suitable as antibacterial agents, insect repellents, deodorants and fragrances. Specifically, cinnamon and cloves, or herbs of the Labiatae family such as oregano, thyme, sage, basil, rosemary, lavender, etc. are dried, and these are used alone or in combination in an appropriate amount, and finely ground and used. be able to. The essential oil obtained by distilling these herbs can be used by impregnating the crushed herbs and other functional materials. Materials such as charcoal such as Bincho charcoal, activated carbon, and zeolite are particularly excellent in deodorizing effects and are suitable as deodorizers. It is suitable as a deodorant or fragrance. To form functional materials such as antibacterial agents and deodorants, lactic acid bacteria, yeast,
A complex culture solution in which various kinds of microorganisms such as photosynthetic bacteria coexist may be used. Each of these materials is pulverized into a powder or a chip so that the material can be filled in the nonwoven fabric layer 4. From the viewpoint of easy encapsulation in the inside 4, it is appropriate to pulverize finely to, for example, about 20 to 60 mesh, more preferably about 20 to 40 mesh. In addition, each material can be appropriately selected and used according to the place where the sheet is installed, the environment, the application, etc. However, it is preferable to use a natural material free of chemicals and impurities.

As shown in FIG. 3, the multi-layer sheet 1 having the above-described structure has the uneven non-woven fabric layer 4 positioned with the dense non-woven fabric 13 facing upward, and the powder And the base material 2 are polymerized and bonded to the base material 2 via the adhesive layer 3, and the valleys to the flat portions 6 around the peaks 5 are heated and pressed to the base material 2, It can be manufactured by enclosing the filled powdery or chip-shaped raw material 8 in a space 7 formed between the surface of the base material 2 and the peak 5 of the nonwoven fabric layer 4.

The substrate 2 most preferably has the above-described laminated structure, but has a structure in which an aluminum layer is laminated on a PET layer by vapor deposition without adhering kraft paper;
A structure in which an aluminum foil is bonded to the T layer may be used. Further, a structure in which an aluminum foil is bonded to kraft paper may be used. In each of these structures,
Instead of aluminum, an aluminum alloy or other metal having excellent heat resistance and gas barrier properties can be used. In addition, the uneven shape of the nonwoven fabric layer 4 corresponds to the peaks 5 shown in the figure.
The shape is not limited to the shape of the valley or the flat portion 6 and can be set arbitrarily. For example, a number of hexagonal peaks in a plan view are connected to form a honeycomb, a number of hexagonal spaces are independently formed, and the inside is filled with the above-described material, and a number of slender peaks in a plan view are staggered. The elongated space portion may be independently formed by being connected in a shape, and the inside may be filled with the above-mentioned material.In any case, the size of one space portion is not so large,
It is preferable that a large number be continuously arranged.

The multilayer sheet 1 of the present invention thus formed is laid or loaded on a storage shelf, a food shelf, a refrigerator, or the like of a kitchen unit, and is used by placing various foods and seasonings thereon. be able to. In this case, the nonwoven fabric layer 4
Has a high fiber density of the dense nonwoven fabric 13 on the side that encloses the powdery or chip-shaped material 8 in the space 7, so that the particle size of the powdery or chip-shaped material 8 can be reduced. The anti-bacterial and deodorizing effects can be increased, and without overflowing to the outside of the sheet, and since the fiber density of the coarse non-woven fabric 14 on the sheet surface side is set low, containers for foods and seasonings are provided. It is possible to reliably absorb and retain the water and oil components flowing down from the container and prevent it from adhering to a shelf board. Thus, the solution absorbing action of the nonwoven fabric layer 4 and the material 8
Fully demonstrate both the antibacterial and other actions of
The food preservation environment can be maintained in a sanitary manner. The multi-layer sheet 1 of the present invention can be used by laying it in a place for storing articles other than food, such as a chest or drawer where moisture easily fills, a shoe box or the like where mold and unpleasant odor are likely to occur.

[0016]

According to the multilayer sheet of the present invention, both the solution absorbing action of the nonwoven fabric and the action of the functional material filled in the sheet, such as the antibacterial action, can be sufficiently exhibited. Compared with, it has a tremendous effect in maintaining a hygienic preservation environment for foods and the like.

[Brief description of the drawings]

FIG. 1 is a plan view of an example of a multilayer sheet according to the present invention, in which an intermediate portion is omitted.

FIG. 2 is an enlarged sectional view taken along the line II-II of FIG.

FIG. 3 is a view for explaining a step of enclosing a powdery or chip-shaped material, wherein FIG.
(B) shows a state where the nonwoven fabric layer is thermocompression-bonded to the substrate.

FIG. 4 is a partially enlarged sectional view of a conventional multilayer sheet.

[Explanation of symbols]

 1 Multilayer sheet 2 Base material 3 Adhesive layer 4 Non-woven fabric layer 8 Powdery or chip-like material 10 Aluminum layer 13 Dense non-woven fabric 14 Coarse non-woven fabric

Claims (2)

[Claims] 1. A nonwoven fabric is laminated on a sheet-like base material having a metal thin film layer via an adhesive layer, and a part of the nonwoven fabric is adhered to form a space inside the nonwoven fabric at a non-adhered portion. In a multilayer sheet formed by filling a powdery or chip-shaped material having a sanitary action such as antibacterial, insect repellent, deodorizing, deodorizing, and absorbing moisture in a space portion, the nonwoven fabric is obtained by laminating and bonding nonwoven fabrics having different fiber densities. A multilayer sheet characterized by being arranged such that the higher fiber density is on the base material side and the lower fiber density is on the sheet surface side. 2. The multilayer sheet according to claim 1, which is filled with a powdery or chip-like material containing an herbal plant component.