KR100450495B1 - thin heatseal film for strengthening function of protective surface - Google Patents

Abstract

The present invention relates to a thin film heat seal film for transferring a thin film layer coated with a resin ink on a base film having releasability to the surface of the adherend, and separating the base film to laminate the adherend with the resin thin film. As a gasket seal resin containing a base film having a releasability for release, a functional thin film layer coated with a resin containing an additive for strengthening the function as an upper layer of the base film, and a urethane-based resin opposed to heat sealability as an upper layer of the functional thin film layer. Including the coated adhesive layer is characterized in that the edge of the laminated adherend is easily cut.

The functional thin film heat seal film according to the present invention is a mixture of wax or silicone oil and heat curing accelerator to enhance scratch and chemical resistance, and visible or invisible fluorescent pigment and visible or invisible to impart a special security element. It has the advantage of enhancing the function of the laminated surface of the adherend to be protected by adding fluorescent dyes or photoluminescent pigments, special chemicals for expressing chemical discoloration, pearl pigments, conductive materials or UV blocking agents alone or in combination. have.

In addition, since the boundary between the laminated adherend surface and the non-deposited surface of the thin film is easily broken, there is no need for a separate cutting, and there is an effect that can be easily separated from the laminated adherend only by a tensile force for separating the adherend surface.

Description

Thin heatseal film for strengthening function of protective surface

The present invention relates to a thin film laminating film, and more particularly, a thin film layer coated with a resin ink on a base film having releasability is transferred to a surface of an adherend such as a card or a document, and the base film is separated to laminate the adherend with a resin thin film. It relates to a thin film laminating film.

Laminating refers to coating a film film such as a synthetic resin film on the surface of the printed material such as documents, advertisements, cards, or the like for the weather protection, durability, and light resistance of real objects of the advertisements.

As a conventional laminating method, there is a method of cutting a film at a predetermined distance from the periphery of the contents by fusing the both sides of the adherend for protecting the contents with a polyolefin-based thermoplastic synthetic resin film such as polyethylene, polypropylene, PVC, etc. .

However, the synthetic resin film may be thin in appearance due to its thickness and consume a large amount of synthetic resin material, and may be inferior in adhesion to the surface of the adherend, or may be refracted by the thickness of the film, such that letters or pictures on the surface of the adherend may not be clearly seen. In addition, there is also a disadvantage that after a lamination is finished to cut at a certain distance from the periphery of the adherend.

It is also processed into a composition such as aluminum deposition film / polyethylene resin, polypropylene film / polyethylene resin, polyester film / polyethylene resin / ethylvinylacetate resin and the like as in food packaging container films and commercial laminating films.

In order to meet the requirements of water resistance, porosity, durability, etc., since the resin film itself is made of a strong fabric, most of the preformed films are coated with a hot melt adhesive layer by an extrusion method such as a tee-die method or dry lamination. Even if the fabric has a low micron thickness, the material itself is strong, and after laminating in a heat seal method, the surface of the adherend must be cut using a tool such as a cutter.

In addition, there is a method of roller coating the adherend with a synthetic resin solution and then drying. The synthetic resin solution used in this method is a synthetic resin dissolved in an organic solvent. The printed matter may be smeared by contact with the organic solvent, and there may be problems such as generation of harmful gases to the human body by evaporation of the organic solvent.

In order to overcome the above problems, the laminating method of Korean Patent Application No. 10-1998-2504, a paper and a synthetic resin film or a synthetic resin film surface having a mold release property with a polyethylene solution in which polyethylene was dissolved in an organic solvent. After laminating to a laminate, the organic solvent of the coating film on the heteromorphic surface is completely evaporated through lamination to the printed material as a laminating sheet, thereby transferring the polyethylene coating layer (thin film) layer of the laminating sheet to the surface of the adherend. Although the method is proposed, the laminated surface is weak in heat, lacks in water resistance and solvent resistance, and the surface is easily stained or the thin film layer is brittle, and the adhesion between the adhesive and the thin film is weak.

In addition, when using the thin film according to the above method, it is not necessary to cut the periphery of the adherend, but it is necessary to use a laminating sheet having a margin of about 5 mm to 10 mm than each periphery of the adherend, and a backing paper receiving the adhesive layer of the surface is required. There is a hassle.

Accordingly, the present invention has been made in order to solve the above-mentioned conventional problems, and scratches, solvent resistance, chemical resistance, and the like of the laminated surface despite the thin film including a functional layer containing a functional enhancement additive An object of the present invention is to provide a thin film laminating film that enhances functions such as water resistance.

In addition, the boundary between the laminated surface and the non-deposited surface of the thin film is easily broken so that no additional cutting is required, and the thin film laminating film is easily separated from the laminated substrate simply by a tension force for separating the adherend surface. It aims to do it.

In addition, an object of the present invention is to provide a thin film laminating film including a hot melt adhesive layer to strengthen the adhesion between the thin film laminating film and the adherend and to prevent an air layer from forming or staining on the surface after laminating.

1 is a view showing a cross section of a functional thin film laminating film according to the present invention.

2 is a view showing a state of use of the functional thin film laminating film according to the present invention.

<Description of the symbols for the main parts of the drawings>

10: base film 20: functional thin film layer

30: adhesive layer 40: adherend

50: cutting part of the deposition surface

In order to achieve the above object, the functional thin film laminating film according to the present invention in the thin film laminating film for laminating the adherend in such a manner as to transfer the coating thin film layer on the laminating sheet to the surface of the adherend, after the lamination and easy to adhere With a base film having a releasability to be separated easily, a functional thin film layer coated with a resin containing an additive for enhancing the function to the upper layer of the base film, and a heat sealable resin to which a urethane-based resin is added to the upper layer of the functional thin film layer Including the coated adhesive layer is characterized in that the edge of the laminated adherend is easily cut.

In addition, in order to achieve the above object, the adhesive layer of the functional thin film laminating film according to the present invention graft-bonds a copolyester polyester resin and a rosin-modified phenolic resin and then adds urethane-based heat sealable resin or vinyl acetate resin to Tekifizer. After the addition of the rosin, the reaction is characterized by coating with a heat sealable resin to which the urethane-based resin is added.

In addition, in order to achieve the above object, the functional thin film laminating film according to the present invention is a mixture of wax or silicone oil and heat curing accelerator to enhance scratch resistance and chemical resistance, and visible or invisible fluorescence to impart a special security element. Enhances the function of the surface laminated to the pigment / dye or phosphorescent pigment, and special chemicals for expressing chemical discoloration, other pearl pigments, conductive materials or UV blocking agents alone or in combination. It is done.

With reference to the drawings, it will be described in detail with respect to the function-enhancing thin film laminating film according to the present invention.

As shown in FIG. 1, the functional thin film laminating film according to the present invention includes a base film 10 and a functional thin film layer 20 coated with a resin mixed with additives to enhance the function of the surface of the adherend onto the base film 10. ), And the adhesive layer 30 is coated on the functional thin film layer 20. As shown in FIG. 2, the adhesive layer 30 abuts the adherend 40 to be protected as a laminating method, passes through the hot laminator together with the base film 10, and then attaches the adherent 40 to the base film 10. When it is removed from the adhesive layer 30 and the functional thin film layer 20 is cleanly cut can be laminated to the adherend.

The base film 10 may be a paper (peel release) treated with a release agent or a polymer synthetic resin film or a polymer synthetic resin film not treated with a release agent in order to provide peelability according to the composition of the primary functional thin film resin, which is a surface material. Can be. At this time, the thickness of the base film is suitable for the thickness of 11 to 15 microns.

The functional thin film layer 20 includes a resin forming a thin film layer and an additive for enhancing the function of the thin film. At this time, the composition of the resin forming the functional thin film layer should satisfy the following conditions.

First, the resin used in the present invention should be able to accommodate it when admixing various types of functional additives. The resin film itself basically has a certain level of solvent resistance, water resistance, water resistance, etc., but in order to solve the lack of heat resistance, water resistance, solvent resistance, etc. of the laminated thin film surface pointed out as a problem of the prior art Since the laminating film is characterized by admixing an additive for enhancing the function, the resin, which is a base material of the thin film, should be able to accommodate it when admixing various additives.

In order to satisfy the above matters, polymers of polyvinyl and acrylic resins, polymers of urethane resins and acrylic resins, or polymers of polyester and modified acrylics can be used.

Second, since the resin used in the present invention should not be separated from the functional thin film layer 20 and the adhesive layer 30 after the lamination is completed, a strong bonding affinity with the adhesive material, which is the secondary thin film, is required. For this purpose, a urethane-based resin, a polyester-based resin, a vinyl-based resin, an acrylic resin, or a polymerized polymer resin, a melamine resin or a UV-curable resin made by polymerizing these mixed resins can be used.

Third, even when the functional thin film layer 20 and the adhesive layer 30 are combined, the composition conditions for easy cutting (cutting) in the Z direction at the contact point of the laminating adhesive surface and the surface should be provided.

In addition, the functional laminating film according to the present invention is characterized by reinforcing the function of the laminated surface on the adherend to be protected by adding an additive in addition to the resin as the base material. Additives used in the present invention include a mixture of waxes or silicone oils and thermosetting accelerators to enhance scratch and chemical resistance, visible or invisible fluorescent pigments / dyes or photoluminescent pigments to impart special security elements, Special agents for expressing chemical discoloration, in addition to pearl pigments, conductive materials or UV blockers may be added alone or in admixture.

The adhesive layer 30 is formed by coating a heat sealable resin on the functional thin film layer 20, and strengthens the adhesive force between the functional thin film layer 20 and the adherend 40 and heat-bonds the air layer on the surface of the adherend after laminating. This can prevent the formation or staining phenomenon.

Commonly used heat sealable hot melt resins are ethyl vinyl acetate, methyl methacrylate, low molecular weight polyethylene, polyester, polypropylene, and the like, and are coated by a T-die extrusion or dry lamination method to form an adhesive layer.

In the case of a dry lamination method, a roche, a rosin derivative, a terpens polymer, a petroleum-based hydrocarbon resin, a phenolic resin, etc. may be used as a tackifier. For example, rosin polyester 25-125 and petroleum wax 40-120 are mixed with ethylene vinyl acetate resin 100, or phenolic resin is used as a contact adhesive to neoprene or nitrile. In this case, there is an advantage that the wettability and adhesion are enhanced.

In particular, the present invention is mixed with a urethane resin in addition to the heat sealable synthetic resin in the adhesive layer in order to make the thin film layer easily cut off without using a knife or a cutter, etc. after lamination, and simply removing the adherend from the base film. Relatively high molecular weight urethane resins are weakly molecularly bonded between the polymer chains of heat sealable resins, so that the intermolecular bonds are easily broken due to the strong Z strength at the periphery of the adherend. It can be artificially lowered.

It can be seen that the basic principle is similar to a stamping foil that heat is applied so that only gold or the like is coated on a desired letter or pattern. In other words, the stamping foil is a dry lamination method of heat-sealing resin on the aluminum deposition surface. Since the X and Y bonding strength of the deposited aluminum particles is remarkably low, the heat-bonded adhesive resin is thermally transferred onto the ink such as letters or patterns. In this case, the aluminum deposition particles are attached to the adherend only on letters or patterns.

However, in order to artificially lower the X bonding force on the synthetic resin thin film, there is a considerable technical difference from the present invention in which the chemical method of mixing a resin having a property opposite to the heat sealable resin is adopted.

In view of the above, the heat-sealing resin for forming the adhesive layer is preferably mixed with a copolyester-polyester resin and a rosin-modified phenolic resin with tekifier and branded a urethane resin.

At this time, the rosin system is mixed with vinyl acetate in tekifizer, and the same effect may be obtained by branding with a urethane resin.

Meanwhile, the manufacturing process of the functional thin film laminating film according to the present invention will be briefly described as follows.

The functional thin film layer is coated to a thickness of 1 to 5 microns on the base film by micro gravure roll coating, kiss roll coating, comma coater coating, reverse roll coating, knife coating method and the like. The secondary adhesive layer is coated with a thickness of 4 to 10 microns on the functional thin film layer by adjusting the viscosity to suit the coater aptitude at an appropriate solvent and dilution rate in consideration of the adhesion affinity with the functional thin film layer. At this time, for an even thickness surface of the adhesive layer is preferably by a micro gravure or comb coater method. In particular, for the effect of cutting after lamination, the functional thin film layer is preferably 3 to 5 microns thick, and the adhesive layer is preferably 5 to 7 microns thick.

Hereinafter, a preferred embodiment of the present invention will be described.

<Example 1>

Graft polymerization of 85% urethane resin, 5% acrylic resin, and small amounts of additives (catalysts, curing agents, etc.), and oil-based inks mixed with additives for enhancing the function to a thickness of 5 microns on the polyester film to form a functional thin film layer Form. On the dried functional thin film layer, a heat seal adhesive mixed with a copolymerized polyester resin, an appropriate amount of rosin-based tequipy, and a urethane resin is coated with a thickness of 7 microns and dried.

In this case, as an additive for enhancing the function, an invisible fluorescent pigment, a transparent organic conductive agent, a solvent-chromic / thermochromic color changing agent, a color dye, a mixture of an invisible fluorescent pigment and a UV blocking agent, a mixture of a transparent organic conductive agent and a UV blocking agent, Either mixture of silicone oils and thermoset accelerators can be selected.

<Example 2>

Graft polymerization of 10% urethane resin, 60% acrylic resin, and small amounts of additives (catalysts, curing agents, etc.) and a thin film of 5 microns on a polyester film are applied to the oil-based ink mixed with additives for enhancing the function. Form. On the dried functional thin film layer, a heat seal adhesive mixed with a copolymerized polyester resin, an appropriate amount of rosin-based tequipy, and a urethane resin is coated with a thickness of 7 microns and dried.

In this case, as an additive for enhancing the function, an invisible fluorescent pigment, a transparent organic conductive agent, a solvent discoloration type / thermochromic color changing agent, a color dye, a mixture of an invisible fluorescent pigment and a UV blocking agent, a mixture of a transparent organic conductive agent and a UV blocking agent, Either mixture of silicone oils and thermoset accelerators can be selected.

<Example 3>

Graft polymerization of 10% urethane resin, 60% acrylic resin, and small amounts of additives (catalysts, curing agents, etc.) and a thin film of 5 microns on a polyester film are applied to the oil-based ink mixed with additives for enhancing the function. Form. On the dried functional thin film layer, a heat-seal adhesive mixed with a modified rosin-based tequipy and urethane resin in a modified polyethylene acetate resin is coated with a thickness of 7 microns and dried.

In this case, as an additive for enhancing the function, an invisible fluorescent pigment, a transparent organic conductive agent, a solvent-chromic / thermochromic color changing agent, a color dye, a mixture of an invisible fluorescent pigment and a UV blocking agent, a mixture of a transparent organic conductive agent and a UV blocking agent, Either mixture of silicone oils and thermoset accelerators can be selected.

<Example 4>

Functional thin layer by graft polymerization of 10% polyvinyl resin, 20% acrylic resin, and small amount of additives (catalyst, hardener, etc.) and oil-based ink mixed with additives for enhancing function to a thickness of 5 microns on polyester film To form. On the dried functional thin film layer, a heat-seal adhesive mixed with a modified phenolic acetate resin and an appropriate amount of phenolic tekipy and urethane resin is coated with a thickness of 7 microns and dried.

In this case, as an additive for enhancing the function, an invisible fluorescent pigment, a transparent organic conductive agent, a solvent-chromic / thermochromic color changing agent, a color dye, a mixture of an invisible fluorescent pigment and a UV blocking agent, a mixture of a transparent organic conductive agent and a UV blocking agent, Either mixture of silicone oils and thermoset accelerators can be selected.

Example 5

Graft polymerization of 10% polyvinyl resin, 30% polyester resin, and small amounts of additives (catalyst, hardener, etc.), and oil-based ink mixed with additives for enhancing the function is applied on the polyester film to a thickness of 5 microns. A thin film layer is formed. On the dried functional thin film layer, a heat-seal adhesive mixed with an appropriate amount of a phenolic tequipy and a urethane resin in a modified polyethylene acetate resin is coated with a thickness of 7 microns and dried.

In this case, as an additive for enhancing the function, an invisible fluorescent pigment, a transparent organic conductive agent, a solvent-chromic / thermochromic color changing agent, a color dye, a mixture of an invisible fluorescent pigment and a UV blocking agent, a mixture of a transparent organic conductive agent and a UV blocking agent, Either mixture of silicone oils and thermoset accelerators can be selected.

<Examples of Additives for Enhancing Composition and Function of Coating Agent>

Composition of Functional Thin Film Coating Agent Additives for enhanced function Composition of adhesive layer coating 85% of urethane resin systems, acrylic resin systems 5% Invisible Fluorescent Pigment (UV Blocker) Copolymer polyester resin, rosin-based tequipy, urethane resin 10% of urethane resin systems, acrylic resin 60% Transparent organic conductive agent (UV blocking agent 10% of polyvinyl resins, 20% of acrylic resins Solvent discoloration / thermochromic Modified Polyethylene Acetate Resin, Phenolic Tequipy, Urethane Resin 10% of polyvinyl resin, 30% of polyester resin Colored dyes

As described above, although the functional thin film laminating film according to the present invention is a thin film, there is an effect of enhancing the function of protecting the adherend from scratches, chemicals, moisture, heat, ultraviolet rays, etc. by mixing an additive for enhancing the function. In particular, since it is a thin film and has an adhesive property, it is advantageous to have a more robust security function if a layered security element is used when several layers are overlapped.

In addition, the boundary between the laminated adherend surface and the non-deposition surface of the thin film is easily broken, so that no separate cutting is required, and there is an effect that can be easily separated from the laminated adherend only by a tension force for separating the adherend surface.

In addition, since the film has a thin flexible film layer, it is equivalent to the texture of the adherend even after laminating, and if the adherend is paper, the laminating film layer can also be torn together, and workability is good because ordinary laminators can be used. .

Claims (12)

A thin film laminating film for laminating an adherend in such a manner as to transfer a coating thin film layer on a laminating sheet to the surface of the adherend, A base film having releasability for easy separation from the adherend after lamination; A functional thin film layer coated with a resin containing an additive for enhancing function and a substrate of any one of a polymer of polyvinyl and acrylic resin or a graft polymer of urethane and acrylic or a modified polyester and an acrylic condensate as an upper layer of the base film; A functional thin film laminating film, characterized in that the edge of the adherend laminate is easily cut, including an adhesive layer coated with a heat sealable resin to which the urethane resin is added as an upper layer of the functional thin film layer. The method of claim 1, wherein the adhesive layer, Functional graft laminating film characterized in that the edge of the adherend laminate is easily cut by graft bonding the copolyester polyester resin and the rosin modified phenolic resin and then coated with a heat sealable resin containing a urethane resin. The method of claim 1, wherein the adhesive layer, Functional thin film laminating film, characterized in that the edge of the film laminate is easily cut by coating with a heat sealable resin containing urethane resin after adding rosin to vinyl acetate acetate and reacting with rosin. The method of claim 2, wherein the adhesive layer, Functional thin film laminating film, which is coated with a thickness of 4 to 10 microns with a heat sealable resin to which urethane-based resin is added The functional thin film laminating film of claim 1, wherein the functional thin film layer is coated with a thickness of 1 to 5 microns. The method of claim 1, wherein the functional thin film layer, Functional thin film laminating film, characterized in that it is coated with a resin containing as a additive a mixture of a wax or silicone oil and a thermosetting accelerator to enhance scratch resistance and chemical resistance The method of claim 1, wherein the functional thin film layer, Functional thin film laminating film, characterized in that coated with a resin containing a fluorescent pigment, fluorescent dye or photoluminescent pigment as an additive to impart a special security element The method of claim 1, wherein the functional thin film layer, Functional thin film laminating film, characterized in that the coating with a resin containing a special drug or a pearl pigment-based additive to express drug discoloration The method of claim 1, wherein the functional thin film layer, Functional thin film laminating film, characterized in that the coating with a resin added a conductive material for imparting conductivity The method of claim 1, wherein the functional thin film layer, Functional thin film laminating film, which is coated with a resin added with a UV blocker The method of claim 1, The functional thin film layer is coated with a thickness of 3 to 5 microns, the adhesive layer is a functional thin film laminating film, characterized in that the coating of 5 to 7 microns thick The method of claim 1, The functional thin film layer is coated with a thickness of 5 microns, the adhesive layer is a functional thin film laminating film, characterized in that the coating of 7 microns thick