JP3364725B2 - Transferring picture to columnar substrate - Google Patents

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a method for transferring a pattern onto a columnar substrate, and more particularly to a columnar substrate having an uneven or curved outer surface used as a building material such as a window frame or a sill, and a conduit. The present invention relates to an improved method particularly suitable for transferring a pattern having excellent solvent resistance to an outer surface of natural wood or the like having grooves on its surface.

[0002]

2. Description of the Related Art Conventionally, an appropriate pattern is provided on the outer surface of a long object which is made of a metal-based material such as aluminum or iron or a wood-based material such as natural wood or plywood and has an uneven or curved surface. These products are widely used as building materials such as window frames, sills, and handrails, or as structural members such as furniture. As a means for applying a pattern to these columnar bases, the columnar bases are fixed and arranged, and the thermal transfer sheet is arranged in a columnar shape with its transfer layer side facing the columnar base material that is the transferred substrate. A so-called thermal transfer laminating method in which the transfer sheet is superposed on the base material and heated on the transfer sheet with a heating roll, and then only the releasable base material sheet is separated, and the transfer layer is transferred onto the base material, or a picture using a lapping laminating machine. A method of applying, in which the columnar substrate is run in its longitudinal direction, while a printing ink is attached to one side of a flexible belt-like sheet according to a desired design, and the ink is in an undried state. While pressing the ink adhesion surface of the sheet against the outer surface of the base material, the sheet is fed in the same direction as the base material at the same speed, and the adhesive force is used to transfer the ink to the outer surface of the columnar base material. After that, remove the sheet from the substrate Loose-line transfer method (KOKOKU 3-26
No. 66, etc.) are known.

In the conventional method, the columnar base material is fixedly arranged, and the thermal transfer laminating method in which the thermal transfer sheet is superposed on the columnar base material and the pattern is transferred thereto is generally a hot-melt adhesive as an adhesive. In addition, the structure of the transfer sheet is complicated, and a large amount of heat is required to melt the adhesive, resulting in a large amount of power consumption and an increase in cost. Further, although it is possible to paint on a flat flat substrate by good transfer, it is difficult to paint on a substrate having complicated irregularities or curved surfaces.

In the painting method using the lapping and laminating machine, the work can be performed in-line, and even for a columnar substrate having a complicated surface shape, a pressing roll for pressing or guiding the transfer sheet to the substrate is used. This is an effective method because good painting can be performed by appropriately selecting the shape and mounting position, but it has some disadvantages. For example, this method basically transfers the pattern by using the adhesive force while the printing ink is uncured or solvent is not dried, and the pattern is printed in a short time after the pattern is printed on the release sheet. It is necessary to perform transfer. Therefore, it is difficult to inspect the quality of the pattern and when a defective pattern occurs, it is difficult to remove it, and a columnar substrate on which the defective pattern is transferred is manufactured. The cost will increase with the loss of resources. In addition, since the printing ink or solvent is uncured during transfer, the design will flow due to the pressure applied during transfer, and defective products are likely to occur due to deformation or bleeding of the design.

Therefore, the present inventors have proposed, as a method for transferring a pattern onto a columnar base material, which solves the above drawbacks, in Japanese Patent Application No.
Filed No. 210483. Although the above-mentioned various drawbacks were solved by such a method, as a new problem, the pattern layer formed by transferring the surface of the columnar substrate does not have a solvent resistant film on the surface, and thus the pattern can be easily wiped with an organic solvent. It has been confirmed that the layer melts down. For that reason, after transferring a pattern using a transfer sheet, a solvent resistant film was separately applied by post-coating such as urethane paint. Therefore, a work called a painting process is separately required, which causes a problem that the manufacturing cost is significantly increased.

[Problems to be Solved by the Invention]

The present invention has been made in view of the above problems, and an object of the present invention is to efficiently use a lapping and laminating machine (curved laminator) which is usually used for a columnar substrate. An improved pattern on a columnar substrate, which can be used to transfer a pattern, and a columnar substrate with a pattern having excellent solvent resistance can be obtained only by painting on the surface of a wooden substrate. To provide a transfer method of.

[0007]

In order to achieve the above object, a method for transferring a pattern onto a columnar base material of the present invention is to convey a columnar base material having irregularities or curved surfaces on its outer surface in the longitudinal direction thereof. Meanwhile, a curable resin adhesive is layered on the transfer layer surface of the transfer sheet or on the outer surface of the columnar substrate in the step of conveying the transfer sheet in the conveyance direction of the columnar substrate at a speed synchronized with the columnar substrate. An adhesive layer is formed by coating, and while the adhesive layer is not completely cured, a transfer sheet is formed on the surface of the outer surface of the columnar substrate with the transfer layer side as the outer surface side of the columnar substrate. Adhesion is made stepwise by using a plurality of rolls having matching shapes, and then the adhesive force of the adhesive is larger than the adhesive force between the transfer layer and the releasable substrate sheet. To the columnar base material from which the releasable base material sheet is peeled off after it becomes large between the transfer layer and the transfer layer. In the transfer method of the picture, the transfer sheet is releasable substrate sheet, the crosslinkable resin layer by two-component curable resin, characterized by comprising the pattern layer. Also, the rack
A silane coupling agent is preferably hardened in the bridgeable resin layer.
A two-component curable resin as an agent is used.

[0008]

In the method of the present invention described above, as a separate step, a belt-shaped transfer sheet having a transfer layer having at least a pattern layer and a crosslinkable resin layer, which have been printed, dried and cured, on the surface of the releasable substrate sheet is used. By using a curable resin adhesive, the adhesive transfer is performed, and as a constitution, a crosslinkable resin layer is provided between the release layer and the pattern printing layer, which serves to suppress pattern removal due to the solvent. Fulfill

[0009]

DESCRIPTION OF THE PREFERRED EMBODIMENTS The present invention will be described below with reference to the drawings. FIG. 1 is a cross-sectional view showing a laminated structure of a columnar substrate with a pattern obtained by the method for transferring a pattern onto a columnar substrate of the present invention, and FIG. 2 is a perspective view showing an example of lapping lamination used for carrying out the present invention. FIG. 3 and FIG. 3 are perspective views illustrating a state in which the peelable base sheet of the present invention is peeled off.

As shown in FIG. 1, the structure of the columnar substrate 1 with a pattern of the present invention is such that a pattern printing layer 4, a crosslinkable resin layer 5 and a peeling layer are formed on the surface of the columnar substrate 2 via a curable adhesive layer 3. The layer 6 is laminated, and the crosslinkable resin layer 5 is provided so as to cover the entire surface of the pattern print layer 4.

A method as shown in FIG. 2 is used as a method of manufacturing the columnar base material 1 with a pattern. This device is similar to a known lapping and laminating machine. That is, FIG. 2 is a perspective view showing an example of such a well-known lapping and laminating machine, in which the columnar base material 2 is sequentially placed on the belt conveyor 10 driven by an appropriate driving means, and the left side in the figure is shown. Will be transferred to the right.

On the other hand, the transfer sheet 8 is pulled out from above at a speed synchronized with the transfer speed of the columnar base material 2, and is conformed to the outer surface of the columnar base material 2 by a plurality of pressing rolls R _{1 to} R _{n so as to be} brought into close contact therewith. It That is, as shown in FIG. 2, first, place located in the widthwise central portion of the columnar base material 2 of the transfer sheet 8 by the pressing roll R ₁ is in close contact with the columnar substrate 2, then transferred by pressing roll R ₂ After the lateral portion of the sheet 8 is bent along the outer surface shape of the columnar base material 2, the transfer sheet 8 is sequentially turned toward the lateral direction of the columnar base material by the pressing rolls R ₄ and R _5. Are in close contact. As described above, by sequentially adhering from the central portion to the lateral side portions, it is possible to prevent a gap or bubbles from being generated in the adhering surface between the columnar base material 2 and the transfer sheet 8. With the transfer sheet 8 in close contact with the entire length of the columnar substrate 2, the columnar substrate 2
Is transferred to the next belt conveyor 10a.

Although the peelable base sheet 7 can be peeled off by any means, as shown in FIG. 3, a plurality of pressing rolls r _{1 to} r _n corresponding to the shape of the outer surface of the columnar base 2 are formed. By arranging in the reverse order of the case of sticking shown in FIG. 2 and peeling off sequentially from the side portion of the columnar base material 2, it is possible to peel off neatly without tearing of the sheet and disorder of the pattern. Can be done. The columnar substrate after peeling off the releasable substrate sheet 7 is taken out from the conveyor 10a as a columnar substrate with a pattern 1 on which transfer layers such as the pattern printing layer 4 and the crosslinkable resin layer 5 are transferred.

There is no particular limitation on the cross-sectional shape of the columnar base material transferred by the pattern transfer method according to the present invention, and a transfer sheet is applied to the outer surface of the base material by a conventionally known lapping and laminating machine (curved surface laminating machine). Any cross-sectional shape that can be worn may be used. Further, the material is also arbitrary, such as metal materials such as iron and aluminum, synthetic resin materials such as polyvinyl chloride and acrylic resin, natural wood such as cypress, cedar and lauan, or plywood,
Any material can be selected according to the intended final product, such as particle-based boards, wood-based materials such as ceramics, ceramic products such as ceramics.

The releasable substrate sheet 7 used in the transfer sheet 8 used in the present invention has good releasability from the transfer layer.
A film body of ~ 150 μm is used, and the material is
Polyester resin such as polyethylene terephthalate and polybutylene terephthalate, polyolefin resin such as polyethylene and polypropylene, synthetic resin film such as polyvinyl chloride, polyvinylidene chloride, vinyl film such as ethylene-vinyl alcohol copolymer, or a single layer of sheet Alternatively, a plurality of laminates, or a composite sheet of a synthetic resin film and a paper material such as high-quality paper or thin paper may be used. In order to faithfully reproduce the conduit groove on the surface of the wood-based substrate, it is particularly preferable to use a thermoplastic film such as polypropylene that can be stretched in the width direction to some extent.

The peeling layer 6 remains on the transfer target side when the peelable base sheet 7 is peeled off, and has an effect of facilitating the peeling of the both. Such a release layer 6
Various materials can be used as the material of the base material. For example, when the releasable substrate sheet 7 is made of polyethylene terephthalate, polypropylene, acrylic resin or butyral resin is preferable, and when it is polyvinyl chloride, cellulose resin is preferable. . Further, since it becomes a transfer finish and the peeling layer 6 comes to the outermost surface of the painted columnar substrate 1, it is desirable to contain some wax component.

The crosslinkable resin layer 5 is provided between the peeling layer 6 and the pattern printing layer 4 and is constituted. Such a crosslinkable resin layer 5 is not limited to a single layer, and it is possible to stack two or more layers. By providing such a layer, it is possible to improve the solvent resistance of the transferred transfer body.
As a material for the crosslinkable resin layer 5, a two-component curing type resin having a silane coupling agent as a curing agent is preferable, and the solvent resistance effect thereof depends on the thickness of the crosslinkable resin layer 5. It is desirable to provide 4 μm or more. Further, in order to make its solvent resistance effective, it is fully cured by leaving it at room temperature for 1 week or at 40 ° C. for 3 days.

The pattern printing layer 4 may be provided on the entire surface or may be partially provided in a pattern. However, natural wood has a peculiar texture and depth, and also has a feeling of skin texture. In order to obtain a board, it is necessary to reproduce this sense of sag, depth, and texture. Therefore, the pattern printing layer is not provided on the entire surface, but is printed as a "spot pattern" that does not hide the base, and the natural wood base material such as lauan plywood can be seen through from this missing portion.

In the present invention, a transfer sheet, which is a solid film that is adherent and has fluidity, is prepared in advance as a separate step by printing, coating, etc. on the surface of a releasable substrate sheet, followed by curing and drying. Keep it. Immediately before the step of attaching the prepared transfer sheet to the natural wood base material, the transfer layer is separately applied to the pattern layer surface of the transfer sheet or to the surface of the wood base material. For coating on the transfer sheet side, roll coating, gravure coating, reverse roll coating, comma coating, knife coating, etc. can be effectively used, and for coating on the wooden substrate side, spraying is possible. Coating, brush coating, electrostatic coating, etc. can be appropriately selected and used according to the uneven shape of the outer surface of the wooden base material.

The curable adhesive layer 3 is a layer for transferring and adhering the transfer layer to the transferred material, and as the curable resin adhesive, phenol resin, urea resin, diacryl phthalate resin, melamine resin, guanamine is used. A resin, a polyurethane resin, a thermosetting resin such as an epoxy resin, or a composition obtained by appropriately mixing a prepolymer, an oligomer, and / or a monomer having a polymerizable unsaturated bond or an epoxy group in the molecule. An ionizing radiation curable resin is preferably used.

When a diluting solvent is used as a part of the composition of the adhesive, it is preferable to dry the solvent in advance with warm air, infrared rays or the like before laminating the transfer sheet to the wood base material. As a result, it is possible to prevent the transfer sheet from being lifted up by the vaporized solvent after lamination, or to prevent the wood base material or the transfer layer from being deteriorated or deteriorated by the solvent.

Example 1 Matt OPP film (manufactured by Toyobo, P-4166, 25)
μm) as a releasable substrate sheet, an acrylic resin (Hakuhaku 467, manufactured by Showa Ink Co., Ltd.) is applied on the sheet to form a release layer, and a silane coupling agent is used as a curing agent on the two-component curing type. Resin (Showa Ink, Tysol anchor)
Was coated so that the coating amount when dried was 2 g / m ² to form a crosslinkable resin layer. Next, a pattern printing layer (Showa Ink, Chemical X) was formed on the crosslinkable resin layer to prepare a transfer sheet in advance. After curing the transfer sheet at 40 ° C. for 3 days, it is slit into a desired predetermined width. Next, a commonly used curved surface laminator (PC-300 manufactured by Marunaka Shoji)
The knife coater means is positioned in the middle of the transfer sheet transfer path of E), and the adhesive (Kanebo N
SC, RL-910) is applied (application amount: 100 g /
m ² ) The transfer sheet coated with the adhesive was curvedly laminated on a natural wood base material (rawan material) processed into a desired shape. The speed at that time was 15 m / min. Drying and heating were performed at the same time as the lamination to cure the adhesive. The drying temperature was 60 to 70 ° C and the lapping temperature was 20 to 40 ° C. After leaving the adhesive after curing (1 day to 3 days or more),
A natural wood decorative board with a painting was obtained by peeling only the peelable base sheet.

Comparative Example 1 A transfer sheet was obtained in the same manner as in Example 1 except that the pattern layer was directly formed on the release layer without providing the crosslinkable resin layer. The same transfer was performed using the obtained transfer sheet to obtain a decorative board.

The coating films of the decorative boards obtained in the above Examples and Comparative Examples were evaluated for their solvent properties by the following test methods. (1) JAS special plywood thinner resistance test Lacquer thinner is dropped, covered with a watch glass and left at room temperature for 6 hours, and then the watch glass is removed and left at room temperature for 24 hours to prevent the handle from falling. (2) DNP building material thinner test 1500 g with gauze impregnated with lacquer thinner
Do not rub the handle by rubbing it 50 times under load.

[0025]

[Table 1]

As a result, as shown in Table 1, Comparative Example 1 passed the JAS test, but failed the DNP test in which the lacquer thinner was immersed.

On the other hand, in the first embodiment according to the present invention,
It also passed the DNP test in which the lacquer thinner was dipped, and it was possible to obtain a natural wood decorative board excellent in solvent resistance.

[0028]

As described above, according to the method of the present invention, the release layer is provided on the side which is in close contact with the release base sheet, and the crosslinkable resin layer having solvent resistance is provided as a pattern through the release layer. Using a transfer sheet provided between the printed layer and the surface of the wooden base material, which is transferred and laminated with an adhesive, it is possible to use a natural wood tone with excellent solvent resistance without post-coating. A columnar substrate can be obtained.

[Brief description of drawings]

FIG. 1 is a cross-sectional view showing a laminated structure of a patterned columnar substrate obtained by a method for transferring a pattern onto a columnar substrate of the present invention.

FIG. 2 is a perspective view showing an example of lapping lamination used for implementing the present invention.

FIG. 3 is a perspective view illustrating a state in which the peelable base sheet of the present invention is peeled off.

[Explanation of symbols]

1 Column base material with picture 2 columnar substrate 3 Curable adhesive layer 4 Design print layer 5 Crosslinkable resin layer 6 Release layer 7 Peelable base sheet 8 Transfer sheet 10 belt conveyor

Claims (3)

(57) [Claims] 1. A step of transporting a transfer base sheet in the transport direction of the columnar base material at a speed synchronized with the columnar base material while transporting the columnar base material having an irregular surface or a curved surface on its outer surface in the longitudinal direction thereof. A curable resin adhesive is applied in layers on the transfer layer surface of the transfer sheet or the outer surface of the columnar substrate to form an adhesive layer, and the transfer sheet is formed while the adhesive layer is not completely cured. The transfer layer side is used as the outer surface side of the columnar substrate, and the rolls having a shape that matches the surface of the outer surface of the columnar substrate are attached in stages, and then the adhesive force of the adhesive is applied. However, the pattern on the columnar substrate from which the releasable substrate sheet is peeled off after the adhesive force between the transfer layer and the releasable substrate sheet becomes greater than the adhesive force between the adhesive layer and the columnar substrate and between the transfer layers. In the transfer method, the transfer sheet is a releasable substrate sheet,
A method for transferring a pattern onto a columnar substrate, which comprises a crosslinkable resin layer and a pattern layer made of a two-component curable resin . 2. A releasable substrate sheet for a transfer sheet and crosslinkability
The columnar substrate according to claim 1, which has a release layer between the resin layers.
How to transfer the picture. 3. The crosslinkable resin layer of the transfer sheet is a silane cap.
A contract consisting of a two-component curable resin that uses a pulling agent as a curing agent.
The method for transferring a pattern onto a columnar substrate according to claim 1 or 2.