JPH0986095A - Transfer sheet, transfer decorative material, and manufacture thereof - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a transfer sheet with which a decorative material having excellent surface physical property can be obtained, a transfer decorative material thereof, and a method for manufacturing it. SOLUTION: A rear face of a pattern printing layer 3 of a transfer sheet 10 having a top coat layer 2 consisting of a two-part reactive curing resin and the pattern printing layer 3 arranged on a support body 1 is coated with an adhesive layer 4. The face coated with the adhesive is stuck to a base material 20 to be transferred. Thereafter, the support body 1 is peeled, so that a transfer decorative material 30 can be obtained.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a transfer sheet for imparting a design property to a housing member or the like, a transfer decorative material for the transfer sheet, and a method for producing the transfer sheet. The present invention relates to a transfer sheet, which is particularly suitable for lapping transfer, and which can obtain a cosmetic material having excellent surface properties, a transfer cosmetic material for the transfer sheet, and a method for producing the same.

[0002]

2. Description of the Related Art Conventionally, a transfer printing method has been widely used as a method of imparting a design property to the surface of a construction member such as a wooden house member. For example, a base material having an uneven surface or a curved body such as a round bar. The transfer to is generally called wrapping transfer. As a transfer sheet used for this lapping transfer, for example, one having a structure in which a release agent layer, an abrasion resistant layer (top coat layer) made of an acrylic resin, and a pattern layer are sequentially provided on a support is known. An adhesive is applied to the transfer sheet, the transfer sheet is attached to the transfer target member, and then the support is peeled off to produce a decorative material by lapping transfer.

[0003]

However, according to the above-mentioned conventional structure, the peelability from the support is adjusted in order to provide the transfer aptitude so as to flexibly follow the lapping shape of the transferred member. Therefore, since the degree of curing is suppressed to a low level by, for example, reducing the addition amount of the curing agent in the abrasion resistant layer of the transfer sheet, the surface property of the finally obtained transfer cosmetic material is inferior. There is a problem. Further, according to the above-mentioned conventional configuration, the abrasion resistant layer is made of acrylic resin, and the solvent (generally, methylene chloride etc.) contained in the adhesive when the adhesive is applied is on the transfer sheet side. However, due to the difference in the expansion and contraction rate of the resin due to the permeation of the resin, the surface of the abrasion-resistant layer will crack due to the swelling phenomenon due to the pressure and heating during lapping transfer, and the appearance of the transfer decorative material will be impaired. There is.

The present invention has been made in view of the above conventional problems, and an object thereof is to provide a transfer sheet capable of obtaining a cosmetic material having excellent surface physical properties, a transfer cosmetic material thereof, and a manufacturing method thereof. To do.

[0005]

In order to achieve the above object, the transfer sheet of the present invention comprises a support, a top coat layer made of a two-component reaction-curable resin, and a pattern printing layer formed thereon. Is provided.

Further, the transfer sheet of the present invention is characterized in that the two-component reaction-curing resin is present in an amount larger than that of the base resin in proportion to the curing agent.

Further, the transfer decorative material of the present invention is characterized in that the pattern printing layer and the top coat layer of the above-mentioned transfer sheet are transferred to the transfer base material via the adhesive layer.

The transfer decorative material of the present invention is characterized in that the adhesive layer contains a curing agent that reacts with the main resin contained in the top coat layer.

Further, in the method for producing a transfer decorative material of the present invention, an adhesive is applied to the back surface of the pattern printing layer of the transfer sheet described above, and the adhesive-coated surface is attached to a transfer-receiving substrate, After that, the support of the transfer sheet is peeled off to transfer the pattern printing layer and the top coat layer of the transfer sheet to the transfer target substrate.

The method for producing a transfer decorative material of the present invention is
The adhesive is characterized by containing a curing agent that reacts with the main resin contained in the top coat layer.

Furthermore, the method for producing a transfer decorative material of the present invention comprises a step of applying an adhesive to the transfer sheet, a step of attaching the transfer sheet to a transfer base material, and a step of peeling the support. The feature is that it is done online.

The structure of the present invention will be described in detail below.

FIG. 1 is a sectional view showing a method of manufacturing a transfer decorative material of the present invention in the order of steps, and FIG. 2 is a schematic configuration diagram of an apparatus showing an online manufacturing step of the transfer decorative material of the present invention.

As shown in FIG. 1, the transfer decorative material 3 of the present invention.
0 is the pattern printing layer 3 of the transfer sheet 10 (see FIG. 1A) in which the top coat layer 2 and the pattern printing layer 3 are provided on the support 1.
The adhesive layer 4 is applied to the back surface of the substrate (see FIG. 2 (b)), and the adhesive coated surface is attached to the transfer-receiving substrate 20 (see FIG. 1 (c)). Is obtained by peeling (see (d) of the same figure).

As described above, the transfer sheet 10 is formed by sequentially forming the top coat layer 2 and the pattern printing layer 3 on the support 1, and the support 1 has a peelable plastic film. (For example, polyethylene terephthalate (PET) film, oriented polypropylene (OPP) film, etc.) are used.

The top coat layer 2 is made of a two-component reaction curable resin. As the two-component reaction curable resin, for example, a polyurethane resin is used as a main resin, and an isocyanate curing agent such as tolylene diisocyanate (TDI) is added as a curing agent. In addition,
In order to have a transferability capable of flexibly following the lapping processed shape of the transferred substrate 20, and to have a releasability from the support 1, the amount of the above curing agent added is reduced to a top coat layer. It is desirable to keep the degree of curing of No. 2 low. That is, in the two-component reaction curable resin used for the top coat layer 2, the amount of the curing agent added is small, and the amount of the base resin is greater than the amount commensurate with the curing agent.

For the top coat layer 2, other suitable additives are added to the above two-component reaction-curable resin, if necessary, and the thickness is adjusted to about 5 to 10 μm by using a micro coater, a gravure coater or the like. It is formed by coating to a thickness. After coating, this is heat-cured under appropriate temperature conditions to form a film. As described above, since the main resin is present in a larger amount than the curing agent,
Although the curing reaction proceeds to a certain extent, unreacted resin and the like are present at this stage, the degree of overall curing is low, and the formed film is, so to speak, semi-cured.

The pattern printing layer 3 provided on the top coat layer 2 is gravure printed or the like using an ink having a urethane resin as a vehicle in consideration of printability and adhesiveness on the top coat layer 2. Is formed by.

Thus, the top coat layer 2 is formed on the support 1.
As the adhesive layer 4 when the transfer sheet 10 on which the pattern printing layer 3 is sequentially formed and the transfer target substrate 20 are bonded together, it is desirable to use an adhesive that has a fast initial tack and a quick drying and curing. By using such an adhesive having good initial tackiness and curability, a step of applying the adhesive to the transfer sheet 10, a step of attaching the transfer sheet 10 to the transfer substrate 20, and a support. It becomes possible to carry out the step of peeling off 1 online. As such an adhesive, for example, a urethane resin having a solid content and added with methylene chloride or the like as a diluting solvent is applied, and this adhesive further contains the main agent contained in the top coat layer 2. A curing agent that reacts with the resin (for example, an isocyanate curing agent such as methylene diisocyanate (MDI)) is included. The main coat resin 2 is present in the top coat layer 2 in an amount larger than the amount corresponding to the curing agent. By including the curing agent that reacts with the large amount of the main resin in the adhesive as well, the adhesive after the transfer is transferred. The curing agent inside penetrates into the top coat layer 2 together with the solvent and reacts with the unreacted main resin, etc., and the curing reaction proceeds further at this stage, and the degree of curing of the top coat layer 2 further increases. Physical properties are improved.

Next, an explanation will be given of a case where the transfer decorative material of the present invention is manufactured on-line by the apparatus as shown in FIG. 2. The transfer sheet 10 is wound around the unwinding roll 31. After the adhesive is applied by the coater 32 to the back surface of the pattern printing layer 3 of the transfer sheet 10 unwound from the roll 31, and then the solvent of the adhesive is blown off in the drying zone 33 to give tackiness, The adhesive coated surface is bonded to the transfer base material 20, pressed with a rubber roller 34, and then the support 1 of the transfer sheet 10 is peeled off to manufacture the transfer decorative material 30. Taking advantage of the characteristics of the above adhesive that has fast initial tack, quick drying and curing,
After the transfer to the transferred substrate 20, the time until the support 1 is peeled off is shortened, and online manufacturing is possible.
Further, as described above, after the transfer, the cosmetic material having excellent surface physical properties (wear resistance, solvent resistance, etc.) of the top coat layer 2 is obtained by permeation of the solvent in the adhesive and the curing agent into the top coat layer 2. Done.

[0021]

According to the present invention, it is possible to obtain a transfer sheet which flexibly follows the wrapping shape of a housing member or the like and has a top coat layer on a support having an appropriate adhesive force as a transfer sheet.

Further, according to the present invention, the transfer sheet top is provided in order to suppress the curing degree of the transfer sheet and to have the transfer aptitude capable of flexibly following the lapping shape, and the peelability from the support. In the coating layer, the amount of the curing agent is suppressed to a low amount, and the main resin is present in an amount larger than the amount commensurate with the curing agent. Also, the curing agent that reacts with the large amount of the main resin should be contained in the adhesive. After the transfer, the curing agent in the adhesive penetrates into the top coat layer together with the solvent and further reacts with the unreacted base resin etc., and the degree of curing of the top coat layer is further improved at this stage. A transfer decorative material having excellent physical properties can be obtained.

Further, according to the present invention, by using an adhesive having a fast initial tack, quick drying, and curing as an adhesive when the transfer sheet is attached to the substrate to be transferred,
After the transfer to the transfer base material, the time until the support is peeled off is shortened, and the online transfer decorative material can be manufactured.

[0024]

EXAMPLES The present invention will be described in more detail below with reference to examples. Preparation of Transfer Sheet A micro-coater or gravure coater was used on one side of a PET film having a thickness of 25 μm and a two-component reaction-curable resin obtained by adding 3 to 8 parts by weight of tolylene diisocyanate (TDI) as a curing agent to 100 parts by weight of a polyurethane resin. It is used to apply a thickness of 5 to 10 μm. After coating, this is 40 ℃
It was heat-cured for 10 days under the above temperature conditions to form a cured topcoat layer.

Next, the printability on the top coat layer,
MEK: toluene: IPA = 5: 5:
A desired pattern printing layer was formed on the top coat layer by gravure printing using a mixed solvent of 1 (weight ratio) and an ink containing a urethane resin as a vehicle to prepare a transfer sheet. Preparation of Transfer Decorative Material Next, a transfer decorative material was prepared by an online process using an apparatus as shown in FIG.

That is, on the surface of the transfer sheet obtained as described above on the side of the pattern printing layer, 25% by weight of urethane resin solids, 75% by weight of methylene chloride as a solvent, and MDI as a curing agent.
Using a knife coater, 1 part of the adhesive compounded with 5 parts by weight
After coating to a thickness of 00 μm (wet) and then removing the solvent of the adhesive in a drying zone set at 60 ° C.,
The adhesive coated surface of the transfer sheet is attached to a wood base material for lapping transfer, and after pressing with a rubber roller, the above P
The transfer decorative material of the present invention was obtained by peeling off the ET film. The transport speed was 20 m / min, but no inconvenience occurred even if the support was peeled off online as described above.

The obtained transfer decorative material had excellent surface properties such as abrasion resistance and solvent resistance.

[0028]

As described in detail above, according to the present invention, a transfer which flexibly follows the wrapping shape of a housing member or the like and the top coat layer on the support has an appropriate adhesive force as a transfer sheet. A sheet is obtained.

Further, according to the present invention, the transfer sheet is provided with a transferability capable of flexibly following the lapping process shape while suppressing the degree of curing of the transfer sheet, and a releasability from the support. In the top coat layer, the amount of the curing agent is kept low, and by including this curing agent also in the adhesive, the curing agent in the adhesive permeates into the top coat layer together with the solvent after transfer, and the main resin And the curing reaction of the topcoat layer is further improved in the post-transfer stage, and as a result, a transfer decorative material having excellent surface physical properties can be obtained.

Further, according to the present invention, by using an adhesive having a fast initial tack, quick drying and curing as an adhesive when the transfer sheet is attached to the substrate to be transferred,
Since it is possible to shorten the time until the support is peeled off after the transfer to the transfer base material, it is possible to manufacture the transfer decorative material online.

[Brief description of drawings]

FIG. 1 is a cross-sectional view showing a method of manufacturing a transfer decorative material of the present invention in the order of steps.

FIG. 2 is a schematic configuration diagram of an apparatus showing a process of manufacturing the transfer decorative material of the present invention online.

[Explanation of symbols]

 1 Support 2 Topcoat Layer 3 Pattern Printing Layer 4 Adhesive Layer 10 Transfer Sheet 20 Transferred Substrate 30 Transfer Decorative Material 31 Unwind Roll 32 Coater 33 Dry Zone 34 Rubber Roll 35 Support Release Roll

Claims (7)

[Claims] 1. A transfer sheet comprising a support and a topcoat layer made of a two-component reaction-curable resin on which a pattern printing layer is provided. 2. The transfer sheet according to claim 1, wherein the two-component reaction curable resin is present in an amount larger than that of the base resin in proportion to the curing agent. 3. A transfer decorative material, comprising the pattern print layer and the top coat layer of the transfer sheet according to claim 1 or 2 transferred to a transfer-receiving substrate via an adhesive layer. 4. The transfer decorative material according to claim 3, wherein the adhesive layer contains a curing agent that reacts with the main resin contained in the top coat layer. 5. The transfer sheet according to claim 1 or 2, wherein an adhesive is applied to the back surface of the pattern printing layer, the adhesive-coated surface is bonded to a transfer-receiving substrate, and then the transfer sheet is transferred. A method for producing a transfer decorative material, which comprises transferring the pattern printing layer and the top coat layer of a transfer sheet to a transfer-receiving substrate by peeling the support. 6. The method for producing a transfer decorative material according to claim 5, wherein the adhesive contains a curing agent that reacts with a main resin contained in the top coat layer. 7. The step of applying an adhesive to the transfer sheet, the step of attaching the transfer sheet to a transfer target substrate, and the step of peeling the support are performed online. Of manufacturing transfer cosmetic material of.