KR20010006100A - Application films - Google Patents

Abstract

The application film of the present invention is advantageously used as an intermediate transfer member when applying a marking member to an adherend, in particular a complex three-dimensional structure, and has a good balance between flue, rubber elasticity and rigidity. The film was subjected to a 10% modulus load of 0.3 to 1.6 kgf / 15 mm, 10% modulus stress of 0.1 to 0.8 kgf / mm ² , 100% when tested at a tension speed of 200 mm / min according to the procedure disclosed in JIS K 7127. Modulus stress of 0.7 to 2.5 kgf / mm ² , and a rate of change of modulus stress of 3.0 or more.

Description

Coating film {APPLICATION FILMS}

Various coating members for use in applying the marking member to the adherend have been proposed in the art, and have been used in practice. For example, Japanese Patent Laid-Open No. 6-51702 discloses a coating tape which peels off a decorative pressure-sensitive adhesive having a predetermined shape laminated on a release material from a release material and then transfers it onto the adherend. The backing to the tape shows a 2% modulus load 3 to 4 kg / 15 mm width at a tension speed of 0.2 m / min, and at least 50% elongation at break. Since the backing to this tape possesses specific properties, the pressure-sensitive adhesive sheet is satisfactorily delivered on the application tape, and can be easily operated with high efficiency when applied to an adherend having three-dimensional areas and irregularities. It is also advantageous in this case because there are no wrinkles or air bubbles.

Japanese Laid-Open Patent Publication No. 7-138540 discloses a coating film for use in applying a marking sheet comprising a backing of a thermoplastic resin and a pressure-sensitive adhesive layer provided on one side of the backing, the backing film being softer and softer than the marking sheet. Rubber elasticity is large. The backing to the coated film is made of soft vinyl chloride resin, and the properties of the film are preferably 10% modulus load 1.5-2.5 kg / 15 mm-width and maximum elongation 150-300%. The film thickness is 50-100 micrometers, and the thickness of a pressure sensitive adhesive layer is 10-20 micrometers. This application film can deliver the marking sheet without wrinkling or causing blushing even on surfaces with convex microstructured surfaces.

Applicants of the present invention sell this coating tape as "# 331 Tate." In the case of this coating tape, a soft vinyl chloride resin is used as the backing, which, for example, has a tape thickness of about 68 gm, a pressure sensitive adhesive layer of about 7 μm, a 10% modulus load of 1.5 kg / 15 mm-width And a maximum elongation of 275%. Applicants of the present invention market "Scotchcal ^™ 3650 film" as a marking film that can be used with this coating film. In the case of this coated film, a soft vinyl chloride resin is used as the backing, which has a property of, for example, a film thickness of about 80 gm and a maximum elongation of 54%. Marking products, a combination of Scotchcal ^TM 3650 film and # 331 coating tape, have been recognized by many consumers for many years and have been used to apply to various three-dimensional parts in exterior materials such as automobiles and motorcycles.

In addition, Scotchcal ^™ MB305W films and Scotchcal ^™ CS206C53 films are commercially available as marking films with superior coating performance to three-dimensional surfaces than Scotchcal ^™ 3650 films. For the Scotchcal ^™ MB305W film, urethane resin is used as the backing film, which has a film thickness of 53 μm and a maximum elongation of 265%. On the other hand, for the Scotchcal ^™ CS206C53 film, the backing film has a two-layer structure consisting of a soft vinyl chloride resin and a urethane resin, and has a film thickness of about 148 μm and a maximum elongation of 85%.

However, the recent motorcycle exterior materials such as fuel tanks, fenders, etc., require the marking product to be applied to a much higher three-dimensional surface area than that currently available. The marking products described in the aforementioned publications cannot satisfy this requirement. In particular, when the fuel tank, fender, etc. have a high three-dimensional area, when the area of the area where the marking film is applied is increased, it is necessary to apply more carefully to prevent wrinkles or air bubbles, and as a result, Workability is remarkably reduced. In order to improve the processability associated with film application, the resulting film thickness can be reduced to cope with various shapes. That is, "shape match" can be improved. However, such thin films increase the likelihood of rupture during operation, and the so-called "stiffness" is unsatisfactory, leading to problems such as poor workability, print registration, and in some cases adhesion between films in operation. In addition, even when carefully applied, wrinkles or air bubbles cannot be avoided. In addition, despite careful work, the marking film is often damaged after application because of the complex shape of the area where the marking film is applied.

The present invention relates to an application film, more particularly an application film that can advantageously be used as an intermediate transfer member in the application of a marking member in the form of a tape or a film to an adherend. Since the coating film of the present invention has an excellent balance between softness, rubber elasticity and rigidity, the coating film can be satisfactorily applied to an adherend having an irregular or high stereoscopic region, thereby providing a processability. It is excellent and does not damage the marking member. Thus, the coating film of the present invention can be advantageously used to apply a marking film having a predetermined shape or decoration to an adherend such as an automobile or a motorcycle or any other adherend.

1 is an enlarged cross-sectional view showing a preferred embodiment of the coating film of the present invention. 1 illustrates an application film 10 having a backing 1 and an adhesive layer 2. As shown in the figure, the application film 10 comprises a backing 1 and a pressure sensitive adhesive layer 2 provided on one side of the backing 1, which pressure sensitive adhesive layer 2 can be applied to the marking film. (Not shown). Applying a release sheet (not shown) to the surface of the pressure sensitive adhesive layer 2 may be applied to the coating film and other materials or to the coating film during storage of the coating film 10 in roll form or other form or upon application of the marking film. It is preferred to avoid unintentionally sticking to each other between them, which is commonly practiced in the art.

The backing used in the application film of the present invention is not particularly limited as long as it has the required year. Suitable backings that can be used are, for example, soft vinyl chloride resins, urethane resins, polyolefin resins and polyester resins, with soft vinyl chloride resins and urethane resins being preferred. The backing may consist of one of these resins or alternatively a laminate comprising two or more of these resins combined.

The thickness of the backing can vary considerably depending on the desired effect. In general, however, 85 to 160 gm is preferred. If the thickness of the backing is less than 85 gm, the stiffness of the resulting marking product is unsatisfactory, resulting in excessive aging of the entire product when the release sheet is separated from the marking film prior to use of the product. The thickness of the backing is greater than 160 gm as needed.

The nature of the backing used in the film is particularly important for the practice of the present invention. Particularly when tested at a tension rate of 200 mm / min according to the procedure described in JIS K 7127, the backing is 10% modulus load 0.3-1.6 kgf / 15 mm, preferably 0.3-0.6 kgf / 15 mm; 10% modulus stress 0.1 to 0.8 kgf / mm ² , preferably 0.1 to 0.5 kgf / mm ² ; 100% modulus stress 0.7-2.5 kgf / 15 mm; And a rate of change of modulus stress of 3.0 or more. If the modulus load and the modulus stress exceed each of the above upper limits, the year is unsatisfactory, resulting in poor conformity to the solid. If the rate of change in modulus stress is less than the lower limit, the rubber elasticity is unsatisfactory. This causes wrinkles in the periphery of the marking film. The backing used preferably has a maximum elongation of at least 200%. If the maximum stretching force is less than 200%, the applied film cannot be satisfactorily stretched to achieve the expected purpose.

The pressure-sensitive adhesive layer applied to one side of the backing is not particularly limited. Therefore, it can be formed to an appropriate thickness by the conventional coating method using the pressure-sensitive adhesive commonly used in the art. Suitable pressure-sensitive adhesives such as acrylic pressure-sensitive adhesives based on butyl acrylate, rubber pressure-sensitive adhesives based on styrene-butadiene rubber (SBR), urethane pressure-sensitive adhesives, silicone pressure-sensitive adhesives, vinyl acetate pressure-sensitive adhesives, and the like, which are conventionally used in the art. It can be used as an example of an adhesive. The thickness of the pressure-sensitive adhesive layer formed by coating the pressure-sensitive adhesive described above may vary, but is preferably about 10 to 20 ㎛.

The adhesive strength of the pressure-sensitive adhesive layer, that is, the adhesion strength of the coating film to the marking film, is appropriately selected in consideration of various factors, for example, the material of the marking film to be applied, the adhesion of the marking film to the adherend, and the working environment for application. Can be. In general, the adhesive strength of the coated film to the marking film is in the range of 10 to 800 gf / 25 mm as measured according to the procedure specified in JIS Z 0237. The strength of the adhesive force should be less than the adhesive strength of the marking film to the adherend because the applied film should be peeled off the marking film in the final step.

As briefly described above, the pressure-sensitive adhesive layer of the coated film is preferably protected by the release sheet until just before use. Since the release sheet used is not particularly limited, any one conventionally used in the art may be used. Suitable release sheets include, for example, sheets of woven or nonwoven fabrics, paper and plastics, and the sheets are releasably processed. Suitable release agents include, for example, silicone release agents.

The application film may be provided or stored in various forms. For example, it may be provided in the form of a roll tape having a predetermined width. It can also be cut into sheets having a predetermined size and provided in the form of a predetermined number of sheets as one set. Moreover, an application film can be provided as a marking product with a marking film.

There is no particular limitation on the marking film to be delivered to the adherend through the coating film of the present invention. For example, it is advantageous to use marking films, such as the Scotchcal ^™ 3650 film, the Scotchcal ^™ MB30SW film, and the Scotchcal ^™ CS205C53 film made by Miningota Mining and Manufacturing Company, which have been described above in connection with the prior description.

Application of the marking film to the adherend using the application film of the present invention as the intermediate transfer member can be carried out by the following procedure, for example.

Initially, an application film comprising a backing and a pressure sensitive adhesive layer is provided. A marking film comprising a decorative film having a pressure sensitive adhesive layer and a release sheet provided on the decorative film in the pressure sensitive adhesive is provided separately. The application film is applied to the marking film on the surface remote from the pressure sensitive adhesive layer to form a marking film integrated with the application film, ie an intermediate transfer member constituting the marking product.

After the formation of the intermediate transfer member, the intermediate transfer member is placed in a predetermined area of the adherend so that the application film faces upwards and then fixed through the pressure-sensitive adhesive layer of the decorative film.

According to the size of the marking product or the like, the fixing step may be performed only by manual operation or as necessary with the application device. In the present invention, when fixed, the intermediate transfer member can be appropriately stretched according to the state of the one-dimensional region or the adherend, and the intermediate transfer member can be directly attached to the adherend surface without forming wrinkles and making air bubbles. . After fixing the intermediate transfer member, the application film is peeled from the decorative film of the marking film fixed to the adherend. Then, a decorative film bonded to the adherend in the three-dimensional region is produced.

Problem to be solved by the present invention

The object of the present invention is to solve the above problems in the art and can be advantageously used as an intermediate transfer member when applying the marking member to the adherend, especially in a highly steric region, with an excellent balance between the ductility, rubber elasticity and rigidity. To provide a film.

Summary of the Invention

The present invention provides an application film comprising a backing and an adhesive layer provided on one side of the backing for use as an intermediate transfer medium in the application of the marking member to the adherend, wherein the adhesive layer can be applied to the marking member. The backing was tested at a tension speed of 200 mm / min according to the procedure disclosed in JIS K 7127.

10% modulus load 0.3-1.6 kgf / 15 mm,

10% modulus stress 0.1 to 0.8 kgf / mm ² ,

100% modulus stress 0.7-2.5 kgf / 15 mm ² , and

It has a rate of change of modulus stress 3.0 or more. The "rate of change of modulus stress" is a value measured by the following equation.

Rate of change of modulus stress = 100% modulus stress / 10% modulus stress

The present invention has been conducted various studies on the evaluation of the workability associated with the application of the marking film for the purpose of finding a clue to solve the problem of the conventional marking product, the result of the application of the coating film for the application of the marking member in the highly three-dimensional area It has been found that the property is a good balance between flue, rubber elasticity and stiffness. "Year" is necessary because satisfactory flexibility and extensibility is necessary for the applied film in order to align the marking product in the steric region. "Rubber elasticity" is necessary because, in the case of an applied film, even if the softness is satisfactory, it forms a sagging, which is a plastic deformation mainly formed near the end when applied to the three-dimensional region, and thus remains wrinkled. By the way, when the applied film used has rubber elasticity, i.e., a wide range of elastic regions, the contractive force of the applied film can disperse the deflection near the end to perform the application without causing any appearance problems. In addition, the rigidity of the coated film is also important. If the application film used does not possess satisfactory rigidity, the application film is excessively warped when the release sheet is separated from the film when the marking member is applied to the adherend, and the holding capacity is lowered. This makes it difficult to work such as printing registration for the application of the marking member and significantly lowers the workability.

As will be apparent from the following detailed description, according to the present invention, a material having properties particularly capable of ensuring excellent ductility and rubber elasticity is selected as the backing for the coating film, and the thickness of the backing is complimentary to these properties. Acts on and imparts stiffness to the film.

Aspect of invention

The invention will now be described with reference to the following preferred embodiments. In the following description, description will be made in relation to a film as a marking member, ie, a "marking film", to aid in understanding the present invention.

The invention will be explained with reference to the following examples. It should be understood that the present invention is not limited to these examples.

Example 1

Preparation of Coating Film 1 (Example of the Invention)

A polyurethane film having a thickness of 145 μm was produced by extruding a thermoplastic polyurethane elastomer (polyester polyurethane, weight average molecular weight Mw = 5.67 × 10 ⁵ , number average molecular weight Mn = 7.54 × 10 ⁴ , Mw / Mn = 7.52). An acrylic pressure-sensitive adhesive mainly containing butyl acrylate was evenly coated on one side of the polyurethane film to a thickness of 20 μm. For the resulting “coating film 1” with pressure sensitive adhesive, 10% modulus load, 100% modulus load, maximum elongation, 10% modulus stress, 100% modulus stress and the rate of change of the modulus stress were 200 according to the procedure disclosed in JIS K 7127. It was measured at a tension speed of mm / min. The results are summarized in the following Tables 1 and 2.

Example 2

Preparation of Coating Film 2 (Example of the Invention)

33 parts by weight of dioctyl phthalate as a plasticizer, 15 parts by weight of polyester plasticizer and 2 parts by weight of epoxidized soybean oil as a stabilizer were added to 100 parts by weight of vinyl chloride resin, and the resulting mixture was rolled to obtain a 86 µm thick vinyl chloride resin film. Prepared. Subsequently, an acrylic pressure-sensitive adhesive mainly containing butyl acrylate was uniformly coated on one side of the vinyl chloride resin film to a thickness of 12 μm. For the resulting “coating film 2” with pressure sensitive adhesive, 10% modulus load, 100% modulus load, maximum elongation, 10% modulus stress, 100% modulus stress and the rate of change of modulus stress were 200 according to the procedure disclosed in JIS K 7127. The measurement was made at a tension speed of mm / min. The results are summarized in the following Tables 1 and 2.

Example 3

Preparation of Coating Film 3 (Example of the Invention)

26 parts by weight of dioctyl phthalate as a plasticizer, 14 parts by weight of polyester plasticizer and 2 parts by weight of epoxidized soybean oil as a stabilizer were added to 100 parts by weight of vinyl chloride resin, and the resulting mixture was rolled to obtain a 146 gm thick vinyl chloride resin film. Prepared. Subsequently, an acrylic pressure-sensitive adhesive mainly containing butyl acrylate was uniformly coated on one side of the vinyl chloride resin film to a thickness of 15 μm. For the resulting “coating film 3” with pressure sensitive adhesive, 10% modulus load, 100% modulus load, maximum elongation, 10% modulus stress, 100% modulus stress and the rate of change of modulus stress were 200 according to the procedure disclosed in JIS K 7127. The measurement was made at a tension speed of mm / min. The results are summarized in the following Tables 1 and 2.

Example 4 (comparative example)

For comparison, a # 331 coated tape commercially available from Sumitomo 3M Limited using a vinyl chloride resin film as the backing (lot number 33080326) was used as "coating film 4".

This backing film was prepared by adding 33 parts by weight of dioctyl phthalate as a plasticizer and 2 parts by weight of epoxidized soybean oil as a stabilizer to 100 parts by weight of vinyl chloride resin and rolling the resulting mixture. The thickness of the backing film is 68 micrometers. The pressure-sensitive adhesive layer on the coating tape was prepared by uniformly coating an acrylic pressure-sensitive adhesive mainly composed of butyl acrylate to 7 μm thickness on one side of the backing. For the resulting “coating film 4” with pressure sensitive adhesive adhesive, 10% modulus load, 100% modulus load, maximum elongation, 10% modulus stress, 100% modulus stress and the rate of change of modulus stress were subjected to the procedure disclosed in JIS K 7127. Accordingly measured at a tension speed of 200 mm / min. The results are summarized in the following Tables 1 and 2.

Coating film Modulus load (kgf / 15 mm) Elongation (%) 10% 100% One 0.31 1.6 650 2 0.53 2.7 318 3 1.6 4.5 270 4 (comparative example) 1.5 2.8 275

Coating film Modulus load (kgf / mm ² ) Rate of change of modulus stress 10% 100% One 0.14 0.73 5.2 2 0.41 2.1 5.1 3 0.71 2.1 3.0 4 (comparative example) 1.4 2.8 2.0 The rate of change of modulus stress is 100% modulus stress / 10% modulus stress

Example 5

This example demonstrates the use of an applied film as an intermediate transfer member for delivering a marking film to an adherend. The application films prepared in Examples 1-4 were applied and directly contacted with two marking films, Scotchcal ^™ 3650 film and Scotchcal ^™ CS206C53 film, respectively, available from Sumitomo 3M Limited. The resulting intermediate delivery member was cut into circles of 50-100 mm diameter with 5 mm increments. After the release sheet of the marking film was peeled off from the circular film, the film was applied to a spherical surface having a radius of 75 mm. As the diameter of the circle increases, the difficulty in applying the film to the spherical surface increases. For each example, the critical point at which workability associated with the coating or original film is degraded and wrinkled (ie the maximum diameter of the original film that can be applied) is summarized in Table 3 below.

Coating film Marking film 3650 CS206C53 One 80 mm 95 mm 2 80 mm 90 mm 3 80 mm 90 mm 4 (comparative example) 60 mm 70 mm

As will be apparent from the results shown in Table 3, the use of the application film of the present invention can improve the processability associated with application over that for a conventional high functional application film, and prevent wrinkles from occurring.

Effect of the invention

As will be evident from the foregoing description, the use of the film of the present invention makes it easy to apply the marking film to irregular or highly three-dimensional areas such as fuel tanks and fenders without causing disadvantages such as creating wrinkles or air bubbles. And at the same time provide excellent processability. In addition, the coating film of the present invention has "stiffness", and is excellent in workability, easy to match printing, and it is possible to avoid the inconvenience that the films adhere to each other during work. Moreover, the use of the film of the present invention can avoid damaging the marking film after application.

Claims (3)

A backing and an adhesive layer provided on one side of the backing, which layer may be applied to the marking member and tested at a tension speed of 200 mm / min according to the procedure disclosed in JIS K 7127. 10% modulus load 0.3-1.6 kgf / 15 mm, 10% modulus stress 0.1-0.8kgf / mm ² , 100% modulus stress 0.7-2.5 kgf / mm ² , and An application film for use as an intermediate transfer medium in the application of a marking member to an adherend characterized by having a rate of change of modulus stress (100% modulus stress / 10% modulus stress) 3.0 or more. The coating film for use as an intermediate transfer medium according to claim 1, wherein the backing has a thickness of 85 to 160 µm. The coating film for use as an intermediate transfer medium according to claim 1 or 2, wherein the adhesive strength to the marking member is 10 to 800 gf / min.