KR20160080723A - Thermal transfer film having cubic effect for fabric - Google Patents

Abstract

The present invention relates to a stereoscopic heat transfer film for fabric which comprises: a heterogeneous film; an ink layer formed on the heterogeneous film; a foam layer formed on the ink layer; an enhancing layer formed on the foam layer; and an adhesive layer formed on the enhanced layer. The adhesive layer contains a foamer. Therefore, a problem of weak adhesion and surface modification generated when transferring heat to fabric with low surface density can be solved.

Description

Technical Field [0001] The present invention relates to a thermal transfer film having a cubic effect for fabric,

TECHNICAL FIELD The present invention relates to a steric thermal transfer film, and more particularly, to a steric thermally transferable film for a fabric having excellent adhesion to a thermal transfer pattern layer and shape stability of a surface of a pattern layer even when thermally transferred to a fabric having no smooth surface, .

A conventional thermal transfer image for 3D stereoscopic effect is generally composed of a releasing agent layer, a pattern layer, a foam layer for giving a three-dimensional effect, and an adhesive layer for adhering to a substrate. When the film on the releasing agent layer is removed through a series of cooling steps after the adhesive layer of the thermal transfer paper is adhered to the substrate by applying heat and pressure, a pattern layer, a foam layer, and an adhesive layer remain on the substrate, The three-dimensional effect is realized by foaming of the foam layer when heat and pressure are applied. It has also been proposed that a foam layer is formed in multiple layers in order to take advantage of the three-dimensional effect. An offset printing layer is formed on the transparent ink layer in order to take advantage of the three-dimensional effect of the pattern transferred to the clothes. Two stiffening layers Has been proposed.

However, even if the three-dimensional feeling is well implemented, a substrate having a small contact area such as a knitted fabric, a fabric fabric having a low surface density such as a mesh fabric, or a nonwoven fabric has a low adhesive force so that a pattern layer having a three- There is a problem that arises. Further, when the materials used for the pattern layer, the foam layer and the adhesive layer are polyurethane (PU) or polypropylene (PP) which are weak to heat, they are deformed by heat and pressure at the time of heat transfer, , The surface of the pattern is not smooth and deformed.

Therefore, in the stencil thermal transfer film for fabrics, it is required to improve the adhesion between the fabric and the pattern layer and the shape stability of the pattern layer.

[Patent Document 1] Korean Patent Publication No. 10-2011-0058176 [Patent Document 2] Korean Patent Publication No. 10-2009-0083320 [Patent Document 3] Korean Patent No. 10-127303

Accordingly, it is an object of the present invention to provide a stereoscopic thermal transfer film for a fabric in which the surface of the solid pattern is not deformed by heat, and the adhesion strength to the fabric substrate is improved so that the pattern layer transferred to the fabric can be well maintained.

In order to solve the above-described problems, the present invention provides a release film; An ink layer formed on the release film; A foam layer formed on the ink layer; A reinforcing layer formed on the foam layer; And an adhesive layer formed on the reinforcing layer, wherein the adhesive layer contains a foaming agent.

According to a preferred embodiment of the present invention, it is preferable that a pre-treatment agent layer is further included between the release film and the ink layer.

According to another preferred embodiment of the present invention, the reinforcing layer is preferably made of a polymer material having a glass transition temperature of 80 ° C or higher.

According to another suitable embodiment of the present invention, the polymeric material constituting the reinforcing layer is selected from the group consisting of polyurethane, polyester, polycarbonate, polyvinyl chloride, polyethylene, polypropylene, epoxy , silicone, polyimide and polyaramid Is preferable.

According to another preferred embodiment of the present invention, the foaming agent is preferably contained in an amount of 0.1 to 30% by weight based on the total weight of the adhesive layer.

According to another preferred embodiment of the present invention, the adhesive layer is made of polyurethane, polyester, polycarbonate, polyvinyl chloride, polyethylene, polypropylene, epoxy , silicone, polyimide, polyaramid and polyvinylidene fluoride And at least one selected from the group consisting of the above-mentioned polymer materials.

According to another preferred embodiment of the present invention, the blowing agent is selected from the group consisting of azodicarbonamide (ADCA), azodiisobutyronitrile (ABBN), dinitrosopentamethyltetramine (DNPT), para toluenesulfonyl Methacrylic acid ester, methacrylamide, acrylic acid, acrylamide, styrene and / or methacrylic acid, one or more blowing agents selected from the group consisting of toluene, toluene, toluene, toluene, It is preferable that the capsule foaming agent is at least one capsule foaming agent selected from the group consisting of polyvinyl acetate and vinyl acetate.

According to another preferred embodiment of the present invention, the reinforcing layer is preferably applied 2 to 20 times.

According to another preferred embodiment of the present invention, the adhesive layer is preferably applied one to five times.

According to another suitable embodiment of the present invention, the fabric may be a knitted, woven or nonwoven fabric.

When the thermal transfer film according to the present invention is thermally transferred to the fabric, the adhesion between the pattern of the thermal transfer film and the fabric is improved, and the durability of the pattern layer formed on the fabric can be improved. Further, A smooth and smooth pattern can be obtained in which the texture of the fabric is not reflected.

1 is a cross-sectional view illustrating a layer structure of a thermal transfer film according to an embodiment of the present invention.
2 is a view showing a layer structure of a thermal transfer film having a pretreatment agent layer according to another embodiment of the present invention.
FIG. 3 is a cross-sectional view showing a bonding relationship between a raw material and a film after thermally transferring a thermal transfer film containing no foaming agent to the adhesive layer, as in the prior art.
FIG. 4 is a cross-sectional view showing a bonding relationship between a raw material and a film after thermally transferring a thermal transfer film containing a foaming agent to an adhesive layer produced according to an embodiment of the present invention.
5 is a schematic cross-sectional view showing the state of the raw fabric surface after the thermal transfer film having no reinforcing layer prepared according to the comparative example of the present invention and containing no foaming agent in the adhesive layer and the bonding relationship between the raw fabric and the film.
FIG. 6 is a photograph showing the surface and cross section of a fabric after thermally transferring a sample of a thermal transfer film having no reinforcing layer between the adhesive layer and the foam layer prepared according to the comparative example of the present invention.
FIG. 7 is a photograph showing the surface and cross section of a fabric after thermally transferring a thermal transfer film sample in which the reinforcing layer is once applied between the adhesive layer and the foam layer according to the embodiment of the present invention.
FIG. 8 is a photograph showing the surface and cross section of the fabric after thermally transferring a thermal transfer film sample in which the reinforcing layer is applied three times between the adhesive layer and the foam layer according to the embodiment of the present invention.

BRIEF DESCRIPTION OF THE DRAWINGS Fig. In the following description of the present invention, a detailed description of known functions and configurations incorporated herein will be omitted so as to avoid obscuring the subject matter of the present invention.

The present inventors have found that when a three-dimensional thermal transfer film is transferred to a base material having a small contact area such as a knitted fabric, a fabric fabric having a low surface density such as a mesh fabric, or a nonwoven fabric, and a pattern layer is formed on the fabric surface, And the shape stability of the fabric such as the appearance of the fabric on the pattern layer is poor. Thus, the present invention has been completed.

1 is a cross-sectional view illustrating a configuration of a thermal transfer film according to an embodiment of the present invention. 1, the fabricated steric thermal transfer film comprises a release film 110; An ink layer 120 formed on the release film 110; A foam layer 130 formed on the ink layer 120; A reinforcing layer 140 formed on the foam layer 130; And an adhesive layer 150 formed on the reinforcing layer 140. The adhesive layer 150 contains a foaming agent. The steric thermal transfer film for fabric according to the present invention contains a foaming agent in the adhesive layer unlike the prior art, and a reinforcing layer is formed between the foam layer and the adhesive layer. The foaming agent contained in the adhesive layer is foamed by heat at the time of heat transfer, causing the adhesive layer to swell and pierce into the empty space of the fabric. As a result, the contact area between the fabric and the pattern layer is widened, and the adhesion is improved. In addition, the anchoring effect can not allow the adhesive layer to escape, and the adhesive strength is complemented. On the other hand, in order to prevent deformation of each layer of the thermal transfer film due to the pressure and heat, the material having a glass transition temperature that is strong against heat and pressure, that is, higher than the thermal transfer temperature is strengthened between the adhesive layer and the foam layer It is possible to prevent the foam layer and the ink layer from being deformed by heat.

Each component will be described in detail.

The release film 110 is a film coated with a release agent, and is removed after the thermal transfer pattern 100 is transferred to the fabric. The releasing film may be a known releasing agent and a film without any particular limitation and may be coated with a silicone releasing agent such as vinylpolysiloxane or hydrogen polysiloxane, a solution of a fluorine component or a natural releasing agent such as carnauba wax, ) Or an OPP (Oriented Polypropylene) film having a releasing property can be used as the film itself.

The ink layer 120 is a layer for determining the hue and shape of the pattern, and is composed of an ink composition including a pigment, a binder, a solvent and / or an auxiliary agent according to the design, and can be applied according to a known technique.

According to one embodiment of the present invention, as shown in FIG. 2, it is also possible to form the ink layer 120 after applying the primer layer 115 on the release film 110. The pre-treatment agent layer 115 is coated on the release surface to assist the application of the ink layer 120 on the release film having the release property. The pre-treatment agent layer 115 is composed of a viscous polymer resin to maintain the application form on the release film. If the viscosity is low, it is undesirable because the surface tension causes the ink to lose its applied form and deforms like a water droplet.

On the ink layer 120, a foam layer 130 is formed to realize a three-dimensional effect. The foam layer 130 is a layer made of a resin containing a foaming agent which is foamed by heat applied at the time of thermal transfer, and may be formed by mixing a capsule-type foaming agent or a foaming agent with a polymer resin having elongation such as polyurethane or nylon. Specific examples of the foaming agent include blowing agents used in the adhesive layer described later. It is preferable that the foam layer contains a foaming agent in accordance with the design for realizing a three-dimensional feeling.

On the foam layer 130, the reinforcing layer 140 is formed so that the pattern in which the three-dimensional effect is realized can be realized without collapsing by heat. In the polymer resin constituting the thermal transfer film, the polymer has a semi-liquid phase, that is, a slight flowability at a temperature higher than the glass transition temperature of the polymer resin. Therefore, when the heat applied at the time of thermal transfer exceeds the glass transition temperature of the polymer resin, the polymer resin is deformed by the pressure, which causes deformation in the adhesive layer, the foam layer, the ink layer and the pre-adhesive layer, Is deformed in the form of the base material.

Therefore, in the present invention, the reinforcing layer 140 is made of a heat-resistant resin and is further included in the heat transfer sheet. Such a polymer resin is preferably composed of at least one material selected from the group consisting of polyurethane, polyester, polycarbonate, polyvinyl chloride, polyethylene, polypropylene, epoxy, silicone, polyimide and polyaramid. Is preferably 80 占 폚 or higher. For example, if the glass transition temperature is lower than 80 ° C, the thermal transfer pattern layer is deformed by heat and pressure of about 80 ° C or more at the time of thermal transfer.

The reinforcing layer is preferably applied 2 to 20 times. When the coating thickness is less than 2 times, the coating thickness is thin and deformation can be caused by heat and pressure, and if it is applied more than 20 times, the process time and cost are increased and defects can be caused.

On the reinforcing layer 140, an adhesive layer 150 is formed, and the adhesive layer 150 contains a foaming agent.

When the foaming agent is mixed and applied to the polymer resin forming the adhesive layer, the foaming agent is expanded by the heat applied at the time of heat transfer, thereby expanding the adhesive layer, filling the void space of the fabric texture, and obtaining an anchoring effect. The adhesive layer can not escape from the fabric due to the anchoring effect, and the adhesion of the pattern layer is enhanced.

The foaming agent is preferably contained in an amount of 0.1 to 30% by weight based on the total weight of the adhesive layer (150). If the content of the foaming agent is less than 0.1% by weight, expansion of the adhesive layer is not sufficient enough to have an anchoring effect to obtain a desired adhesive force. If the content of the foaming agent is more than 30% by weight, A phenomenon that the appearance is deteriorated due to spreading widely occurs.

On the other hand, the excessive expansion is related not only to the content of the blowing agent but also to the number of times of application in the silk screen. As the number of times of application of the adhesive layer containing a foaming agent is increased, the expansion of the foamed layer is greatly increased, which may cause a cosmetic problem. Therefore, the application frequency of the adhesive layer is preferably within 1 to 5 times.

The adhesive layer 150, which is applied on the reinforcing layer 140 and serves as an adhesive during thermal transfer, is made of a polymer resin, and is made of polyurethane, polyester, polycarbonate, polyvinyl chloride, polyethylene, polypropylene, epoxy silicone, polyimide, poly Aramid, and polyvinylidene fluoride (PVDF).

The foaming agent contained in the adhesive layer 150 may be an open cell type azodicarbonamide (ADCA), azodiisobutyronitrile (ABBN), dinitrosopentamethyltetraamine (DNPT), para toluenesulfonyl hydra (TSH) and oxybisbenzenesulfonylhydrazide (OBSH) may be used as the blowing agent. Or a capsule-type blowing agent in the form of a closed-cell may be used. The capsule blowing agent is a form having a foamed agent, usually liquid hydrocarbons, contained in a fine spherical thermoplastic resin shell structure. As the capsule foaming agent, at least one selected from the group consisting of nitrile, methacrylic acid, methacrylic acid ester, methacrylamide, acrylic acid, acrylamide, styrene and vinyl acetate can be preferably used.

The thermal transfer film having the above-mentioned layer structure can be produced by applying each layer using a silk screen.

The thus-prepared thermal transfer film is placed on a fabric 200, such as a knitted fabric, a woven fabric or a nonwoven fabric, whose surface is not smooth, and is adhered by applying a pressure of 0 to 10 MPa and a hot plate of about 80 ° C or higher. (110) is removed, the thermal transfer pattern (100) is transferred to form a final product having a pattern layer.

FIG. 3 is a cross-sectional view showing a bonding relationship between a raw material and a film after thermally transferring a thermal transfer film containing no foaming agent to a raw material 200 in the adhesive layer 150 as in the prior art. . As shown in FIG. 3, the adhesive force of the conventional thermal transfer film to the fabric is weak to such an extent that the adhesive layer is adhered to a part of one side of the fabric. In the fabric having a low surface density such as a mesh fabric or a knitted fabric, The layer is easily removed.

4, the thermal transfer film according to an embodiment of the present invention includes a foaming agent in the adhesive layer 150, foaming the foaming agent by heat during thermal transfer, So that the adhesive layer 150 is bonded to the back surface of the fabric 200. Therefore, the bonding strength between the thermal transfer pattern layer and the fabric can be increased, and the pattern layer transferred to the fabric 200 can be prevented from being easily detached.

Hereinafter, the present invention will be described in more detail by way of examples, but it should be understood that the present invention is not limited thereto and various modifications and changes may be made by those skilled in the art.

Example

The pre-treatment agent, the ink layer, the foam layer, the reinforcing layer, and the foaming agent-containing adhesive layer were applied to the PET film by a silk screen method to prepare a three-dimensional thermal transfer film. The PET film was coated with a carnauba release agent (product of HSC Co., Ltd.) to a thickness of about 12 μm and dried to give a mold releasing ability.

The pretreatment layer was coated with a liquid material (manufactured by Taeyi Ink Company) in which vinyl modified ester resin was diluted by 10% with Ranun and the ink layer was diluted with TA-400 (manufactured by Taeyil Ink Company) by 15% Respectively. The foaming layer was prepared by mixing 10 wt% of foaming agent of azodicarbonamide (ADCA) with GW-999 (manufactured by Taeyei Ink Company). The reinforcing layer was prepared by dissolving PKHH resin of InChemInvestment in Chemicals in a dibasic ester in an amount of 20% by weight. The adhesive layer was prepared by mixing 7 wt% of foaming agent of azodicarbonamide (ADCA) with GW-999 (manufactured by Taeyilk Ink Company).

The silk screen was applied three times for each layer using 150 mesh. After each layer was applied, it was dried at a temperature of 70 캜 for about 3 minutes, and the final product was allowed to stand at room temperature for one day. The resulting product was adhered to a 3D mesh fabric by applying a pressure of 7 MPa on a hot plate at 110 DEG C (upper and lower plates).

Comparative Example

A thermal transfer pattern layer was formed on the fabric in the same manner as in the Example except that no reinforcing layer was formed and the foaming agent was not included in the adhesive layer.

FIG. 5 is a cross-sectional view showing the state of a raw material surface after thermo-transfer of a thermal transfer film sample prepared in the comparative example and the bonding relationship between the raw material and the film. The thermal transfer film without the reinforcing layer 140 is deformed by the heat and the texture of the fabric 200 is reflected on the pre-adhesive layer, which is the top layer of the thermal transfer pattern from which the release film is removed, Respectively. Fig. 6 shows the surface and cross section of the raw fabric after thermally transferring the thermal transfer film according to Fig. 5 to the raw fabric. According to this, the texture of the fabric is reflected on the surface of the fabric, and the cross-sectional photograph of the fabric shows that the adhesive layer is in contact with one surface of the fabric.

FIG. 7 is a photograph showing the surface and cross section of a fabric after thermally transferring a thermal transfer film sample in which the reinforcing layer is once applied between the adhesive layer and the foam layer according to the embodiment, onto the fabric. 8 is a photograph showing the surface and cross section of the fabric after thermally transferring a thermal transfer film sample in which the reinforcing layer is applied three times between the adhesive layer and the foam layer according to the embodiment, on the fabric. 7 and 8 show that the reinforcing layer is formed, and it can be confirmed that the adhesive layer is pushed into the fabric texture and bonded. Compared to Fig. 6 without the reinforcing layer, Fig. 7 and Fig. 8 do not show the morphology of the structure. Fig. 8, in which the reinforcing layer was applied three times, shows that the morphology of the fabric hardly appears on the pattern surface. 7 and 8 show that the adhesive layer is pushed into the fabric texture due to foaming of the foaming agent contained in the adhesive layer, whereas FIG. 6 shows that the adhesive layer is gently adhered to the conventional adhesive layer in such a manner that the adhesive layer adheres closely to the original end .

While the present invention has been particularly shown and described with reference to exemplary embodiments thereof, it is clearly understood that the same is by way of illustration and example only and is not to be taken by way of limitation in the present invention. Various changes and modifications will be possible.

100: Thermal transfer pattern
110: release film
115: Line adhesive layer
120: ink layer
130: foam layer
140: reinforced layer
150: adhesive layer
200: Fabric
201: Fabric texture pattern reflected on thermal transfer pattern

Claims (10)

Release film;
An ink layer formed on the release film;
A foam layer formed on the ink layer;
A reinforcing layer formed on the foam layer; And
And an adhesive layer formed on the reinforcing layer,
Characterized in that the adhesive layer contains a foaming agent.
The method according to claim 1,
And further comprises a pre-treatment agent layer between the release film and the ink layer.
The method according to claim 1,
Wherein the reinforcing layer is made of a polymer material having a glass transition temperature of 80 ° C or higher.
The method of claim 3,
Wherein the polymer material is made of at least one material selected from the group consisting of polyurethane, polyester, polycarbonate, polyvinyl chloride, polyethylene, polypropylene, epoxy silicone, polyimide and polyaramid. Four films.
The method according to claim 1,
Wherein the foaming agent is contained in an amount of 0.1 to 30% by weight based on the total weight of the adhesive layer.
The method according to claim 1,
The adhesive layer is formed of at least one polymer material selected from the group consisting of polyurethane, polyester, polycarbonate, polyvinyl chloride, polyethylene, polypropylene, epoxy silicone, polyimide, polyaramid and polyvinylidene fluoride (PVDF) A three-dimensional thermal transfer film for a fabric.
The method according to claim 1,
The blowing agent may be selected from the group consisting of azodicarbonamide (ADCA), azodiisobutyronitrile (ABBN), dinitrosopentamethyltetramine (DNPT), para toluenesulfonyl hydrazide (TSH) and oxybisbenzenesulfonyl (OBSH) or one or more blowing agents selected from the group consisting of nitrile, methacrylic acid, methacrylic acid ester, methacrylamide, acrylic acid, acrylamide, styrene and vinyl acetate Wherein the foaming agent is a foaming agent.
The method according to claim 1,
Wherein the reinforcing layer is applied 2 to 20 times.
The method according to claim 1,
Wherein the adhesive layer is applied one to five times.
The method according to claim 1,
Wherein the fabric is a knitted fabric, a woven fabric, or a nonwoven fabric.

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