JP4113937B2 - Laminated film, laminated body, and building materials, synthetic leather products, freshness-preserving materials, and bunko using these - Google Patents

Description

  The present invention includes a laminated film having excellent properties such as antibacterial properties, antifungal properties, heat shielding properties, electromagnetic wave shielding properties, antistatic properties, and laminated materials, and building materials and synthetic leather products using these as part of the materials, It relates to freshness-keeping material, banso.

  Nowadays, consumers, especially women, are becoming more and more clean-oriented, building materials such as wallpaper, ceiling agent, flooring, synthetic leather products such as shoes, sandals, wallets, bags, coats, bathtub lids, freshness Antibacterial properties have also been demanded for daily necessities such as holding materials and bunsou. Therefore, conventionally, wallpaper containing an organic antibacterial agent (for example, see Patent Document 1) and synthetic leather containing an inorganic antibacterial agent (for example, see Patent Document 2) have been developed.

  However, these wallpaper and synthetic leather have a problem that the antibacterial agent contained therein may adversely affect the human body and the effect cannot be maintained for a long time.

  Moreover, although these wallpaper and synthetic leather have antibacterial properties, they have a problem that they do not have heat shielding properties, electromagnetic wave shielding properties, and antistatic properties at the same time.

Furthermore, polychlorinated biphenyls, polyethylene films, and non-woven fabrics and paper made of pulp are marketed as freshness-retaining materials, but these only have antioxidant and drip absorption effects. In addition, food wrap cloth (see Patent Document 3) can be seen as an active freshness-keeping material that uses antibacterial properties. There was a problem.
JP 2003-277206 A JP 2002-038380 A Japanese Patent No. 3159948

  Therefore, the present invention can maintain antibacterial properties for a long period of time without adversely affecting the human body, and has excellent properties such as heat shielding properties, electromagnetic wave shielding properties, and antistatic properties, is highly convenient, and has a high cost. Another object of the present invention is to provide a low laminated film, a laminated body, and building materials, synthetic leather products, freshness-preserving materials, and soots which use them.

  The laminated film according to the present invention has at least a metal layer made of a metal having antibacterial properties and a synthetic resin film covering both surfaces thereof. Moreover, a laminated body provides the coating layer which covers at least one surface of the said laminated | multilayer film. Moreover, the building material, synthetic leather product, freshness-preserving material, and plaster according to the present invention are obtained by using the laminate or laminated film as at least a part of the material.

  The metal contained in the metal layer of the laminated film is ionized when moisture adheres to the laminated film itself or the surface of the laminated body provided with a coating layer, and permeates the synthetic resin film to provide antibacterial and antifungal properties. Show. Moreover, since the metal layer conducts electricity, static electricity does not accumulate on the surface of the synthetic resin film. Further, the metal layer prevents the transmission of electromagnetic waves and heat.

  The best mode for carrying out a laminate according to the present invention will be described below with reference to the drawings.

  FIG. 1 is an enlarged view of an end face of a laminated body A according to the present invention. As shown in this figure, the laminated body A has a coating layer 2 made of a synthetic resin attached to one surface of a laminated film 1 by an adhesive layer 3. It is a thing. Therefore, the laminated film 1, the coating layer 2, and the adhesive layer 3 will be described below.

  First, as shown in FIG. 2, the laminated film 1 is formed by depositing an antibacterial metal on the synthetic resin film 1a to form the metal layer 1b. It is adhered by the adhesive 1c so as to become.

  Here, the synthetic resin film 1a is a film made of polyester, nylon, polyethylene, polypropylene, or the like, and has a thickness of about 5 to 50 μm. Above all, from the viewpoint of function security and product cost, about 6 to 25 μm is preferable. The amount of metal ions eluted from the metal layer 1b can be increased by making fine holes on the surface of the synthetic resin film 1a, etc. Depending on the amount of metal ions eluted, not only the antibacterial function but also the antifungal function. Can also have functionality.

  The metal layer 1b is made of an ion-exchangeable metal having antibacterial properties, such as silver, copper, and zinc. Among these, silver is safe because it is safe, does not discolor, hardly rusts, and has high antibacterial performance and conductivity. Is optimal. Moreover, the thickness of the metal layer 1b is about 20-150 nm, and about 50-100 nm is preferable from the point of the guarantee of a function, and the product cost.

  The adhesive 1c is a conventionally used adhesive such as a polyurethane-based adhesive, a polyester-based adhesive, and an acrylic adhesive, but the building materials and various products that use the laminate A as a material have low formaldehyde properties. Of these, polyurethane and polyester adhesives are preferred because they are often required.

  In addition, as long as the synthetic resin film which covers both surfaces of a metal layer and the metal layer is provided, it may replace with the laminated film 1 and may use another laminated film.

  For example, as shown in FIG. 3, a coat layer 11d made of barium oxide, titanium oxide, a silicon compound, or the like may be provided on the surface of the synthetic resin film 11a opposite to the metal layer 11b. By providing the coating layer 11d, the electromagnetic wave shielding property, antistatic property, antibacterial property, heat shielding property, etc. of the laminated film can be improved when an adverse chemical reaction can be suppressed.

  Further, as shown in FIG. 4, a coat layer 12d made of a pigment such as titanium oxide may be provided between the synthetic resin film 12a and the metal layer 12b. By providing the coat layer 12d, the metal color of the metal layer 12b is erased, and it can be used for products that do not like the metal color, such as a floor material constituting a hospital floor.

  As shown in FIG. 5, a coat layer 13d made of barium sulfide, barium oxide, or the like may be provided between the metal layer 13b and the adhesive 13c. Thereby, even if it reduces the usage-amount of the metal which has antibacterial property which comprises the metal layer 13b, equivalent electromagnetic wave shielding property can be obtained, and when a metal is silver, the production cost of a laminated body is reduced. Can do.

  Furthermore, as shown in FIG. 6, after depositing an antibacterial metal on the synthetic resin film 14a to form a metal layer 14b, the synthetic resin film 14a is adhered to the metal layer 14b with an adhesive 14c. A film may be formed. Manufacturing costs can also be reduced by reducing the metal deposition process. In addition, instead of adhering the synthetic resin film 14a with the adhesive 14c, if the synthetic resin is coated, the manufacturing cost can be further reduced.

  Next, the coating layer 2 may be various synthetic resin layers without particular limitation depending on the use of the laminate, but examples thereof include polyolefin resins such as polypropylene and polyethylene, polyvinyl chloride and polyvinyl chloride biphenyl. And a film made of a polyisocyanate resin such as polyurethane resin and polyurethane. In addition, when the laminate is used as wallpaper, it is appropriate to use vinyl chloride resin or polyolefin resin film that has been used as wallpaper, and when used as a synthetic leather product, synthetic leather has been conventionally used. The use of a polyurethane resin film or the like used as is suitable.

  Further, the adhesive layer 3 can be used as long as it is a conventionally used adhesive, like the adhesive 1c, etc., but, like the adhesive 1c, from the viewpoint of low formaldehyde, polyurethane or polyester System adhesives are preferred.

  The covering layer 2 may be directly applied with a synthetic resin in addition to attaching a synthetic resin film or layer with an adhesive. In this case, the manufacturing cost can be reduced. Further, by chemically or physically foaming the synthetic resin, for example, weight reduction, softening, and heat shielding properties can be further enhanced.

  Such a laminated film 1 and laminated body A can be used as they are or by pasting other resin films, resin layers, fabrics, etc., to building materials such as wallpaper, ceiling agent, flooring, shoes, sandals, wallets, bags, It can be used as daily necessities such as synthetic leather products such as coats and bathtub lids.

  In addition, a release material such as release paper coated with silicon, polyethylene or polypropylene film having releasability is attached to the laminated film 1 or the laminated body A with an adhesive, and then cut into an appropriate size. A freshness-keeping sticker B (freshness-holding material) as shown in FIG. 7 can be manufactured. This freshness-keeping sticker B can keep food freshness or delay maturity by sticking it to a part where food rot such as vegetables such as radishes, fruits and meat starts.

  The pressure-sensitive adhesive can be used without particular limitation as long as it is generally used. Among them, a water-soluble one is preferable because residual moisture promotes elution of metal ions. In addition, a character and a pattern can also be printed on the surface to which the peeling material of a laminated film or a laminated body has not adhered. In addition, by providing a wound pad made of gauze or the like on the adhesive, it can be used not only as a freshness-keeping sticker but also as a banso.

  Further, instead of using the above laminated film 1 or laminated body A as a constituent material for a freshness-keeping sticker, as shown in FIG. 8, a fine powder 15 obtained by pulverizing these is mixed with an adhesive 16, and this is used. The film C applied to the synthetic resin film 17 may be used as a freshness maintaining sticker. With respect to this, by providing a scratch pad made of gauze or the like on the adhesive, it can be used not only as a freshness-keeping sticker but also as a soup.

  Furthermore, a freshness-keeping sheet (not shown) can be produced by cutting the laminated film 1, laminated body A, and film C into appropriate sizes. This freshness-holding sheet (freshness-holding material) produces the same effect as the sticker B by laying under or covering food such as meat. Moreover, it can also form in a bag shape using the said freshness maintenance sheet | seat, and can also comprise as a so-called retort food package. Conventionally, the laminated film for retort packaging used all aluminum for sealing and UV blocking, and food contained in it contained preservatives, which are mainly chemicals, whereas the freshness-preserving sheet The package that uses can not only maintain freshness but also package retort foods without using chemicals that may harm the taste of the ingredients or cause health problems, making it safer than before -The effect of being able to get on distribution / sales routes can also be demonstrated. That is, in this sheet, the elution concentration of silver ions is not at a level that is harmful to health, and is saturated when it reaches a certain level, and thus functions more safely than conventional heavy metal ions.

  Next, the laminate according to the present invention is manufactured and subjected to various tests, and the present invention is described more specifically.

(1) Manufacture of a laminated body Pure silver is vapor-deposited on a polyester film having a thickness of 9 μm by an ion deposition method to form a metal layer having a thickness of 50 nm, and the metal layers are placed inside the formed synthetic resin films. Thus, the laminated film (Example 1) was manufactured by bonding with an adhesive.

(2) Antibacterial test When Example 1 was subjected to an antibacterial test according to JIS Z2801 (film adhesion method), it exhibited an excellent antibacterial activity value of 4.9. In addition, Staphylococcus aureus NBRC 12732 was used as a test strain.

(3) Silver ion elution test About Example 1, when the silver ion elution amount was measured by ICP method used by a water quality test etc., 86 ppb silver ion elution was confirmed. Since it is said that microorganisms such as bacteria are killed at a biological rate of 5 to 10 ppb, Example 1 was found to have sufficient antibacterial properties.

  Thus, the laminated film of Example 1 exhibited excellent antibacterial properties, antifungal properties, heat shielding properties, electromagnetic wave shielding properties, and antistatic properties. Therefore, when using a laminated body based on a laminated film as room wallpaper, ceiling material, or flooring, it is possible to increase the efficiency of cooling and heating by suppressing the movement of heat to the outside. Information leakage due to wireless LAN can be prevented.

  Moreover, when this laminated film is used as a material for daily necessities such as synthetic leather products such as shoes and lids for bathtubs, it is possible to impart a high heat retention effect and antibacterial properties to these products.

  Furthermore, since the part where vegetables and fruits start to rot is determined, it is possible to positively delay rot and maturity by applying a laminated film or a sticker made of a laminated body to the part.

  In addition, if a bandage film made of a laminated film or laminate is applied to the part covering the wound, suppuration of the wound can be suppressed due to its antibacterial properties.

  Since the laminated film and laminate according to the present invention have excellent antibacterial properties, heat shielding properties, electromagnetic wave shielding properties, and antistatic properties, they can be used in various products such as building materials, synthetic leather products, freshness keeping members, and plaster. Can be used.

It is a section perspective view of the layered product concerning this invention. It is a section perspective view of the lamination film concerning this invention. It is a cross-sectional perspective view of the other laminated film concerning this invention. It is a cross-sectional perspective view of the other laminated film concerning this invention. It is a cross-sectional perspective view of the other laminated film concerning this invention. It is a cross-sectional perspective view of the other laminated film concerning this invention. It is an external view of the freshness-keeping sticker according to the present invention. It is sectional drawing of the other freshness maintenance sticker concerning this invention.

Explanation of symbols

A Laminate B Freshness-keeping sticker 1 Laminated film 2 Coating layer 3 Adhesive layer

Claims (12)

Depositing antibacterial metal on a synthetic resin film to form a metal layer, and using the laminated film obtained by bonding the formed synthetic resin films with an adhesive so that the metal layer is on the inside, the laminated film Of these, at least one surface is covered with one coating layer selected from a synthetic resin film, a foamed resin, and a synthetic leather . A metal layer is formed by depositing antibacterial metal on the synthetic resin film, and the formed synthetic resin films are bonded to each other with an adhesive so that the metal layers are inside, and the metal layer of the synthetic resin film A laminated film in which a coating layer is provided on the opposite side of the laminated film, and at least one of the laminated films is a coating layer selected from a synthetic resin film, a foamed resin, and a synthetic leather. A laminate characterized by being covered . A metal layer is formed by vapor-depositing a metal having antibacterial properties on the synthetic resin film, and the formed synthetic resin films are bonded to each other with an adhesive so that the metal layer is on the inside . Or a laminated film in which a coat layer is provided between the metal layer and the adhesive , and at least one surface of the laminated film is selected from a synthetic resin film, a foamed resin, and a synthetic leather. A laminate characterized by being covered with a coating layer . A laminated film obtained by depositing an antibacterial metal on the first synthetic resin film to form a metal layer and then bonding a second synthetic resin film to the metal layer with an adhesive is used. Of these, at least one surface is covered with one coating layer selected from a synthetic resin film, a foamed resin, and a synthetic leather. Building material, characterized by using at least a portion of the material laminate according to any one of claims 1 to 4. A laminated film formed by depositing an antibacterial metal on a synthetic resin film to form a metal layer, and bonding the formed synthetic resin films with an adhesive so that the metal layer is on the inside;
A laminated film in which a coating layer is provided on the surface of the synthetic resin film opposite to the metal layer;
A laminated film in which a coat layer is provided between the synthetic resin film and the metal layer, or between the metal layer and the adhesive,
A laminated film formed by depositing an antibacterial metal on the first synthetic resin film to form a metal layer, and then bonding the second synthetic resin film to the metal layer with an adhesive;
Using one laminated film selected from
A laminate in which at least one surface of the laminated film is covered with a covering layer made of synthetic leather.
A synthetic leather product characterized by being used for at least a part of the material. A laminate comprising at least one surface of the laminated film according to any one of claims 1 to 4 covered with a coating layer made of any one of a synthetic resin film and a foamed resin, A freshness-preserving material characterized by being used for at least a part of the material. The laminated body according to any one of claims 1 to 4, wherein at least one surface is covered with a coating layer made of any one of a synthetic resin film and a foamed resin. A freshness-keeping material characterized in that the fine powder obtained is used as at least a part of the material. Among the laminated film according to any one of claims 1 to 4, at least one surface, a laminate, characterized by being covered with the synthetic resin film and the coating layer made of any one of the foamed resin, A sword that is used for at least part of the material. The laminated body according to any one of claims 1 to 4, wherein at least one surface is covered with a coating layer made of any one of a synthetic resin film and a foamed resin. The fine powder thus obtained is used as at least a part of the material. A retort package obtained by processing a sheet made of the laminate according to any one of claims 1 to 4 into a bag shape. A film sheet formed by applying a pressure-sensitive adhesive mixed with fine powder obtained by pulverizing the laminate according to any one of claims 1 to 4 to a synthetic resin film is processed into a bag shape. Retort package.

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