JP3290880B2 - Transfer overlay film and transfer method thereof - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

The present invention relates to a transfer overlay film. More specifically, the present invention relates to a transfer overlay film capable of protecting the surface and printing surface of a full-color printer output image and the like from the external environment without impairing the feel and flexibility of the material.

[0002]

2. Description of the Related Art A conventional overlay film is formed on a film surface such as polyethylene terephthalate (PET), biaxially oriented polypropylene (OPP), polyvinyl chloride, acrylic resin or fluorine resin by using an adhesive or a hot melt adhesive. The adhesive layer is coated or formed by extrusion lamination. The surface is protected by laminating this film on the printing surface of the printing paper or the image output from the printer. Various labels, pamphlets, restaurant menus, posters, signboards, and the like are known as the film overlays. Hereinafter, this is referred to as a first conventional technique.

On the other hand, there are known outdoor advertising banners, signboards, and the like manufactured by thermally transferring a picture or character by screen printing or offset printing to the surface of a cloth adherend, or by giving a pattern by printing. These use weather-resistant inks or form a weather-resistant curtain by applying a solution of polyurethane resin, acrylic resin, fluorine-based resin, etc. to the surface for those used for a long time outdoors. I have. Hereinafter, this is referred to as a second conventional technology.

[0004]

However, the overlay film formed of PET, OPP, polyvinyl chloride, fluororesin or the like in the first prior art has a relatively large thickness, and the material itself is hard, so-called, Because the stiffness is strong, conventionally, the adherend to which such an overlay film is applied, such as paper or resin film,
Originally, it was hard or had a high modulus of elasticity (so-called stiff) or had no value on the texture of the material.

However, when the overlay film of the first prior art is used for an adherend such as a woven fabric, a nonwoven fabric, or a flexible resin film, not only the flexibility is lost but also the feel of the adherend is impaired. It is.

In the second prior art, since the resin solution is directly applied to the adherend, there is no need to provide an adhesive layer. However, the resin solution permeates into the cloth and solidifies the resin, as well as fixing the fibers and the resin. The fabric becomes hard. In other words, the flexibility and the unique texture of the fabric are greatly impaired.

[0007] The present invention has been made to solve the above problems, and even when applied to a woven fabric, a nonwoven fabric, a flexible resin film, or the like, without impairing the flexibility and texture of the adherend. The purpose of the present invention is to provide a transfer overlay film capable of imparting weather resistance.

[0008]

The transfer overlay of the present invention is provided.
The film is hot-melt bonded to adhere to the adherend.
An adhesive layer, and an ultra-thin resin film provided on the upper surface of the adhesive layer.
And the upper surface of the ultra-thin filmRelease agent layer
And theRelease agent layerResin support film disposed on the upper surface
And is formed from

With such a structure, the transfer overlay film of the present invention, when transferred to an adherend such as a nonwoven fabric, a woven fabric, paper, or a resin thin film, prevents dust and other dirt from adhering and adheres to the substrate by ultraviolet rays. In addition to preventing deterioration of the body and fading of the print surface, etc., since only the ultrathin film is adhered to the surface of the adherend via the hot melt adhesive layer, the flexibility of the adherend is not impaired,
There is no danger of losing the texture by not penetrating any resin into the adherend.

Further, since the ultra-thin resin film is made of a polyurethane film, the film becomes extremely flexible and can be easily attached to the surface of the adherend, so that the amount of the hot melt adhesive to be applied can be reduced. as a result,
The hot-melt adhesive adheres almost only to the surface without penetrating into the adherend such as cloth or nonwoven fabric, and does not impair its material characteristics, especially for cloth or nonwoven fabric.
This has the operational effect of: Furthermore, by forming the thickness of the ultra-thin resin film in the range of 2 to 10 μm, the flexibility and texture of the adherend are not significantly impaired.
In this overlay film, by forming the thickness of the hot melt adhesive layer in the range of 3 to 15 μm, the flexibility and texture of the adherend can be more effectively maintained.

The method for transferring an overlay film according to the present invention comprises a hot melt adhesive layer, an ultrathin resin film provided on the upper surface of the adhesive layer, and a release agent provided on the upper surface of the ultrathin film. layer and, said transfer overlay film comprising formed from the resin support film to be disposed on the upper surface of the release agent layer, the adhesive layer to the character image surface of the character image has been granted flexibility adherend And a step of bonding the adhesive layer to the adherend by pressing a heating source from the upper surface of the support film, and a step of stripping the support film from the part of the release agent layer thereafter. Contains.

The transfer method maintains the flexibility and texture of the adherend as described above, protects the output image surface of the adherend from damage, prevents dirt from adhering, and imparts waterproofness and weather resistance. By doing so, the quality of the adherend can be improved.

[0013]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS Next, a transfer overlay film (hereinafter, simply referred to as an overlay film) of the present invention and a transfer method thereof will be described based on an embodiment shown in the accompanying drawings.

FIG. 1 is a partially enlarged perspective view showing an embodiment of the overlay film of the present invention, and FIG. 2 is a partially enlarged sectional view showing an example of use of the overlay film of FIG.

In FIG. 1, reference numeral 1 denotes an overlay film, a part of which is shown in an enlarged manner. In the figure,
The lowermost layer is a hot-melt adhesive layer 2, an ultrathin resin film layer 3 is laminated on the upper surface, a release agent layer 4 is laminated on the upper surface, and a base film 5 is laminated on the uppermost surface. .

The hot melt adhesive layer 2 has a thickness in the range of 3 to 15 μm.

The ultra-thin resin film layer 3 has a thickness in the range of 2 to 10 μm.

The release agent layer 4 has a thickness in the range of 2 to 4 μm.

The base film 5 has a thickness in the range of 12 to 20 μm, and is usually formed from a PET or OPP film.

As the hot-melt adhesive layer 2, a known material can be used. However, the hot-melt adhesive layer 2 may be laminated with an extremely thin ultra-thin resin film layer 3 and further impair the properties of the object to which the overlay film 1 is adhered. For this reason, it is preferable to use a coating material having a small coating amount and a high adhesive strength at a low temperature. For example, a gravure coat, a reverse coat or a bar coat is made of a solvent-type or emulsion-type resin such as an acrylic resin, a urethane resin, a polyamide resin, or a polyester resin. An extrusion lamination method with an ethylene / acrylic acid copolymer resin or a vinyl acetate copolymer resin is also possible. In addition, the above-described resin can be directly laminated on the surface of a PET or OPP film by an extrusion lamination method, and thermal transfer utilizing the peelability of the PET or OPP film can also be performed. However, from the viewpoint of weather resistance, flexibility, and texture retention, it is preferable to apply a gravure coat or the like to the solvent type or emulsion type resin.

The ultrathin resin film layer 3 has high film strength (tensile strength, elongation, tear strength, impact strength), excellent transparency, weather resistance and flexibility, yellowing over time and brittleness. Use non-curable resin. In particular, a urethane-based resin is preferable because an ultrathin film satisfying the above conditions can be obtained by coating the solution to form a film.

As the release agent layer 4, a release agent such as a silicone resin or a fluororesin type may be used. However, from the viewpoint of adjustment of the peeling force and suitability for a PET or OPP film, a cellulose-based release agent is usually used. It is preferable to use a resin, and uniform coating can be obtained by coating a small amount of the resin.

[0023]

DESCRIPTION OF THE PREFERRED EMBODIMENTS An overlay film 1 having the above structure
An example of the production method will be described below.

First, a base film 5 having a thickness of 1
2 μm PET (product F68, manufactured by Toray Industries, Inc.) was selected, and a solution of cellulose diacetate (acetate flake L-70, manufactured by Daicel Chemical Co., Ltd.) was coated on one side with a gravure coater to a thickness of 1 to 2 μm (solid content). The release agent layer 4 is formed by applying the coating to a certain degree and drying.

Next, an AC varnish No. was applied to the surface of the release agent layer of the film produced in the above process. 3 (manufactured by Dainichi Seika Kogyo Co., Ltd.) by a gravure coater to form a coating having a thickness of 3 to 4 μm,
When dried, the ultrathin resin film layer 3 made of urethane resin is formed.

Next, a linear saturated copolyester resin (Alonmelt P. manufactured by Toa Gosei Chemical Co., Ltd.) is coated on the surface of the ultra-thin resin film layer of the film manufactured in the above process.
ES300) by gravure coater for 7-8.
The overlay film 1 was obtained by forming a hot melt adhesive layer 2 by coating at about g / m ² (solid content). Since the ultra-thin resin film layer 3 is extremely thin, the amount of the hot-melt adhesive is small in this manner, and the extremely thin hot-melt adhesive layer 2 is formed.

Next, the use of the above-described overlay film 1 will be briefly described with reference to FIG.

As an object (substrate) to which the overlay film 1 is transferred, for example, a cloth 7 on which characters and patterns 6 are directly output by an ink jet printer or an electrostatic plotter is used. The hot melt adhesive layer 2 side of the overlay film 1 is superimposed on the surface of the pattern 6 of the fabric 7,
It is inserted between the nip rolls of a hot melt laminator and bonded by a nip pressure of 1.0 kg / cm ² . Next, lamination is performed under the conditions of a laminating roll temperature of 120 ° C. and a laminating speed of 1.5 m / min. The pretreatment conditions, the temperature of the laminating roll, and the laminating speed may be changed according to the material of the adherend or the substance forming the design or the like output on the surface of the adherend. Figure 2 above
See (a).

Next, as shown in FIG. 2B, when the base film 5 is peeled off from the fabric 7, the ultra-thin resin film layer 3 is laminated on the surface of the design 6 of the fabric 7. As described above, since the amount of the hot-melt adhesive is extremely small, the hot-melt adhesive does not penetrate to the inside of the fabric 7 at the time of lamination, and adheres almost to the surface of the fibers or the like of the fabric 7. As a result, the ultra-thin resin film layer 3 also adheres along the surface of the fiber or the like, thereby protecting the design 6 surface of the fabric 7 from damage and preventing dirt from adhering without impairing the feeling of the fabric 7. The quality of the fabric 7 can be improved by imparting waterproofness and weather resistance.

That is, high-quality pictures, calendars, posters, signs, and the like based on nonwoven fabrics and cloth materials can be easily manufactured. Of course, the quality of an adherend other than a nonwoven fabric or a fabric, such as a thin paper or a thin resin film, can be improved without impairing the original flexibility of the material.

[0031]

The overlay film of the present invention protects the output image surface of the adherend from damage, prevents the adhesion of dirt, and improves the quality of the adherend by imparting waterproofness and weather resistance. Can be planned.

According to the transfer method of the present invention, a nonwoven fabric,
The overlay film can be easily transferred to an adherend such as a cloth, paper, and a resin film, and the above-described quality improvement can be performed on the adherend.

[Brief description of the drawings]

FIG. 1 is a partially enlarged perspective view showing one embodiment of an overlay film of the present invention.

FIG. 2 is a partially enlarged cross-sectional view showing an example of use of the overlay film of FIG.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 ... Overlay film 2 ... Hot melt adhesive layer 3 ... Ultra-thin resin film layer 4 ... Release agent layer 5 ... Base film 7 ... Fabric

────────────────────────────────────────────────── ─── Continuation of front page (51) Int.Cl. ⁷ Identification code FI D06P 5/00 118 D06P 5/00 118A D06Q 1/12 D06Q 1/12 G03G 7/00 101 G03G 7/00 101M (58) Survey Field (Int.Cl. ⁷ , DB name) B41M 7/00 B32B 7/06 B32B 27/00 B32B 27/40 B44C 1/165 D06P 5/00 118 D06Q 1/12 G03G 7/00 101

Claims (5)

(57) [Claims] 1. A hot melt bonding for bonding to an adherend.
An adhesive layer, and an ultra-thin resin film provided on the upper surface of the adhesive layer.
And the upper surface of the ultra-thin filmRelease agent layer
And theRelease agent layerResin support film disposed on the upper surface
A transfer overlay film formed from: 2. The transfer overlay film according to claim 1, wherein said ultra-thin resin film comprises a polyurethane film. 3. The ultra-thin resin film having a thickness of 2 to 10
2. The transfer overlay film according to claim 1, which is in the range of μm. 4. The hot melt adhesive layer has a thickness of 3 to 4.
The transfer overlay film according to claim 3, wherein the thickness is in a range of 15 µm. 5. A hot-melt adhesive layer, and the ultra-thin resin film provided together on the upper surface of the adhesive layer, and a release agent layer disposed on the upper surface of the ultra-thin film, the release agent layer A transfer overlay film formed from a resinous support film disposed on the upper surface of the resin overlay film so that the adhesive layer is in contact with the character image surface of the flexible adherend to which the character image has been given; and Transferring an overlay film comprising: a step of bonding an adhesive layer to an adherend by pressing a heating source from an upper surface of the support film; and thereafter, a step of stripping the support film from a part of the release agent layer. Law.