JPH1067199A - Transfer method for facilitating release of transfer sheet base member - Google Patents

Abstract

PROBLEM TO BE SOLVED: To avoid developing a burr on a transferred body when transferred to a continuous lengthshape transferred body by using a transfer sheet. SOLUTION: A transfer sheet 1 which is a little wider than a width L2 of a continuous length shape transferred body 2 is bonded to the transferred body through an adhesive layer to develop a squeeze-out part d at both sides of the transferred body. Next, a press jig 3 is jammed on both sides of the transfer sheet 1 bonded to the transferred body, the squeeze-out part d is bended perpendicularly to the transferred body surface and a bending part is formed in the longitudinal direction of the transferred body 2 on the transfer sheet 1 while moreover moving the transferred body 2 in the flow direction. As mentioned above, after forming the bending part on the transfer sheet 1, the release of the base wood of the transfersheet 1 avoids developing a burr completely and nnecessitates a deburring process.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a transfer method for producing a building material or the like using a transfer sheet. Second, a transfer method in which a transfer sheet substrate can be easily peeled off.

[0002]

2. Description of the Related Art Conventionally, in the case of manufacturing a member for building materials using a transfer sheet, in order to improve the peelability after transfer, the peel strength of silicone or the like in a release layer or a release layer of the transfer sheet is required. A peel strength modifier to lower the content was added. However, in this case, even if the conditions of the manufacturing conditions of the transfer sheet, that is, the printing speed, the drying temperature, etc., are set to be the same,
Due to subtle changes in conditions during printing, for example, changes in the volatilization state of the solvent, changes in the drying temperature, etc., the peel strength varies even for products of the same lot.

[0003] If the peel strength is too low, it will break at the boundary between the transfer area and the non-transfer area in the vicinity of the transfer area of the transfer object, and will remain on the sheet substrate side and be removed together therewith. In many cases, a transfer layer to be formed partially remains, causing so-called foil burrs (hereinafter simply referred to as burrs). Therefore, even if the transfer conditions are fixed, it is difficult to prevent burrs from being generated on the transferred object.

[0004] Alternatively, in order to make the transfer layer brittle and hardly cause burrs, it has been attempted to add fine particles of silica or the like to the transfer layer as disclosed in JP-A-6-179283. . However, the addition of the fine-particle silica causes disadvantages such as an increase in the viscosity of the ink, a change in printability, and a decrease in surface properties such as abrasion resistance of the transfer layer.

[0005] Further, in a release layer provided on a polyethylene terephthalate (hereinafter referred to as PET) film used as a base material of a transfer sheet, the separation from a PET raw material is increased, so that a transfer region and a non-transfer region of the transfer layer are separated. In order to increase the shear stress at the time of peeling the substrate and prevent burrs, a polyester resin is added as a peel strength adjusting agent for increasing the peel strength. In this case, the peel strength changes depending on the processing temperature at the time of transfer, and when the transfer temperature is high, the peeling becomes too heavy,
Depending on the transfer temperature, seizure may occur between the PET substrate and the release layer.

[0006]

If burrs remain on the transferred body after the transfer, a deburring step is required, which is an obstacle to post-processing. In the deburring step, if the burred end is rubbed, there is a possibility that the product itself may be damaged, which requires careful attention and causes a problem in work efficiency. Also,
In the case of using a deburring machine, if the generated burr is brittle, it is easy to remove it. However, if the burr is thin and flexible, and the strength is strong, it is impossible to remove it with a deburring brush.

[0007]

Means for Solving the Problems To solve the above problems, a method of transferring to a long object to be transferred is as follows. In the step of transferring to a long transfer object using a transfer sheet having a transfer layer including at least a decorative layer on a substrate, a transfer sheet wider than the width of the long transfer object, a long transfer sheet Laminating on one or both sides of a to-be-transferred body, pressing the laminate, or adhering a transfer sheet to the to-be-transferred body by heating and pressurizing, and a transfer sheet laminated to the to-be-transferred body A step of bending a portion wider than the width of the object to be transferred, in a direction perpendicular to the longitudinal direction of the long object to be transferred, and a step of peeling off the transfer sheet base material thereafter. A transfer method in which the transfer sheet substrate was easily peeled off was used.

That is, in the step of transferring a transfer sheet having at least a decorative layer such as a printed pattern as a transfer layer to a long transfer object, the width of the transfer sheet is set to be long. The width of the transfer sheet laminated on the transfer object is reduced to a width longer than the width of the transfer sheet. By bending the transfer body at a predetermined angle in the vertical direction with respect to the longitudinal direction, stress is concentrated on the transfer layer and a fold is formed. When the transfer sheet base material is peeled, the transfer layer is cut off from the fold and covered. Burrs do not occur on the transfer member.

[0009]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS Hereinafter, the present invention will be described in detail with reference to the drawings. FIG. 1 is a schematic plan view showing the transfer method of the present invention, and FIG. 2 is a schematic sectional view showing the transfer method of the present invention. FIG. 3 is an explanatory diagram when a transfer sheet is transferred to one side of a transfer target body by the transfer method of the present invention. FIG. 4 is an explanatory diagram when a transfer sheet is transferred to both surfaces of a transfer target body by the transfer method of the present invention.

In the present invention, first, a transfer sheet is prepared by a known technique. For example, as shown in FIG. 3A, a transfer sheet 1 is manufactured by sequentially laminating a release layer 12, a decoration layer 13, and an adhesive layer 14 as a transfer layer on a sheet-like base material 11. Next, as shown in FIG. 3B, the surface of the adhesive layer 14 of the transfer sheet 1 is superimposed on the transfer object 2, and the transfer is performed by applying pressure or heating and pressing according to a known transfer method. The sheet 1 is completely adhered to the transfer object 2.

When the transfer sheet 1 is adhered to a long transfer object 2, as shown in FIG.
₁ is a little wider than the width L ₂ of the transfer member 2, so that the portion d protruding on both sides of the transfer member 2 occurs.
The width of the protruding portion d is preferably about 2 to 10 mm, and 2 m
If it is less than m, it is difficult to bend stably when this part is later bent, and if it exceeds 10 mm, not only the transfer sheet is wasted, but also the protruding portion is unnecessarily bent and the workability deteriorates. .

Next, as shown in FIG. 1, pressing jigs 3 are pressed against both sides of the transfer-receiving body 2 on which the transfer sheet 1 is laminated, and the protruding portion d of the transfer sheet is moved as shown in FIG. The protruding portion d of the transfer sheet is moved along the side surface of the transfer object 2 while moving the transfer object 2 while bending the transfer object 2 upwardly (in a direction away from the side surface of the transfer object). And the transfer sheet 1
To form

When the pressing jig 3 is pressed against the side surface of the transfer object 2, the transfer sheet 1 is sandwiched between the pressing jig 3 and the transfer object 2, and when the transfer sheet 1 is pressed without any gap, the transfer sheet is frictionally pressed. Breakage damage will occur. In particular, the holding jig 3 is made of metal,
In the case of a hard material such as ceramics, breakage damage easily occurs. In order to prevent this, a bent portion 4 is formed by providing a gap Δx between the holding jig 3 and the transferred body 2. The gap Δ
x is preferably set to be 2 to 4 times the thickness of the transfer sheet. The bending direction may be either up or down as long as it is perpendicular to the surface of the transfer-receiving body.

However, as shown in FIG. 4B, when the protruding portion d is bent in a direction in contact with the side surface of the transfer object, when the adhesive layer 14 of the transfer sheet 1 is a pressure-sensitive adhesive,
If the pressing pressure of the holding jig 3 is too strong, the transfer sheet will adhere to the side of the transfer-receiving body, making it difficult to peel the substrate, and the object of the present invention will not be achieved. Further, the bending angle of the transfer sheet is an angle measured from the transfer surface of the transfer object, and is + 45 ° to + 135 ° (when the transfer sheet is bent toward the transfer surface side) or −45 ° to −90 ° (when the transfer sheet is bent). Is bent in a direction away from the surface to be transferred). 2 and 4A show an example where the bending angle is + 90 °, and FIG. 4B shows an example where the bending angle is −90 °.

[0015] The transfer method of the present invention can also be used for simultaneous transfer to both surfaces of a transfer object using a transfer sheet. That is, as shown in FIG.
The transfer sheet 1 is adhered to both sides of the
In the same manner as described above, the protruding portion d of the transfer sheet is bent up and down (in a direction away from the side surface of the transferred object) along the side surface of the transferred object 2 to form a bent portion 4 in the transfer sheet 1. Further, as shown in FIG. 4B, the protruding portion d of the transfer sheet 1 adhered to both sides of the transfer object 2 is bent up and down by the holding jig 3 so as to be in contact with the side surface of the transfer object 2. Alternatively, the folded portion 4 may be formed on the transfer sheet 1. Alternatively, although not shown, the transfer sheet contacting one surface of the transfer surfaces is on the transfer surface side, and the transfer sheet contacting the other surface of the transfer surfaces is on the side away from the transfer surface. It can also be folded.

As shown in FIG. 3 (c), the transfer sheet 1 having the bent portions 4 is peeled off from the base material 11 so that the transfer sheet 2 is interposed between the transfer material 2 and the adhesive layer 14 as shown in FIG. The decorative layer 13 and the release layer 12 can be transferred. As described above, by forming the bent portion 4 on the transfer sheet 1, stress is concentrated on the boundary between the transfer region and the non-transfer region of the transfer layer, and the fold is formed. The transfer layer is completely cut off from the fold, and burrs do not occur on the transfer object. Therefore, even when the transfer object is a long transfer object such as an aluminum plate for a blind, the transfer layer can be transferred cleanly without burrs on both sides thereof.

As the substrate used for the transfer sheet, a sheet (film) of a known thermoplastic resin is used. For example, polyethylene terephthalate (P
ET), thermoplastic polyester resin such as polybutylene terephthalate (PBT), polyvinyl chloride (hereinafter PVC)
), Vinylidene chloride (PVDC), vinyl polymers such as ethylene-vinyl acetate copolymer, saponified ethylene-vinyl acetate copolymer, polypropylene (PP),
Sheets of polyolefin such as polyethylene (PE), polystyrene, polycarbonate, polyamide, acrylic resin such as polymethyl methacrylate, polymethyl acrylate, polyethyl methacrylate, and ABS are used.
Further, a sheet obtained by laminating two or more kinds of these sheets can also be used.

As a substrate, a PET film or a PP film is preferable in consideration of heat resistance, printability and the like. The thickness of the substrate is used in the range of 9 to 100 μm,
50 μm is preferred. If the thickness is less than 9 μm, the strength of the film may be insufficient. If the thickness is 100 μm or more, heat transfer and bending aptitude may be poor in roll transfer, which may cause poor transfer.

The release layer is formed according to the release properties of the sheet-like substrate used. That is, it is formed when the substrate has poor releasability, but is omitted when the substrate itself has releasability. The release layer peels off at the interface with the transfer layer during transfer and is removed together with the substrate. If a release layer is present, it is released at the interface between the release layer and the release layer. The release layer is formed by coating the substrate with a resin such as melamine, silicone, amino alkyd, urethane resin, urea resin, or epoxy, and has a thickness in the range of 0.1 to 5.0 μm.

Further, in order to adjust the peel strength of the release layer, a resin such as silicone, fluororesin, polyester resin or polyethylene may be added to the coating resin composition. Further, in order to adjust the gloss and surface texture of the surface after transfer, a known matting agent such as silica may be added, or a desired embossed pattern may be embossed.

The transfer layer is formed on a substrate or a release layer. The transfer layer is usually a release layer, a decorative layer, and an adhesive layer in order from the side closer to the base material, but the minimum necessary of these is a decorative layer, and other layers are omitted depending on the situation. Is also good.

As the release layer, a known resin used for a transfer sheet is used. For example, acrylic resin, urethane resin, epoxy resin, cellulose resin, vinyl chloride-vinyl acetate copolymer, butyral resin, etc. are used. . To the release layer, a polyethylene wax, a Teflon wax, a carbana wax, a paraffin wax, or the like may be added as an additive in order to make the surface smooth after transfer. The release layer is formed by a known coating method such as gravure coating, roll coating, and screen printing. The thickness of the release layer is usually about 1 to 10 μm. The release layer can be omitted if the transfer layer has sufficient release properties from the base material (or release layer) and if a protective layer is not required on the surface of the decorative layer after transfer.

The decorative layer is typically formed by printing a pattern suitable for the intended use using an ink made of a known binder resin, a coloring agent composed of a pigment or dye, an additive, or the like. As the binder of the ink, one or more resins are selected from resins such as acrylic resins, vinyl chloride-vinyl acetate copolymers, polyesters, cellulosic resins, and urethane resins. Printing method is not particularly limited, conventional gravure printing, silk screen printing,
Offset gravure printing or the like can be used, but a gravure printing method is suitable for printing a wood grain pattern. As a method of forming a decorative layer other than printing, there is a method of forming a metal thin film by vacuum evaporation or sputtering. In addition to the decorative layer,
In some cases, an antistatic layer, an infrared blocking layer, and an ultraviolet absorbing layer are provided.

As the adhesive layer, a heat-sensitive adhesive or a pressure-sensitive adhesive is used. As the heat-sensitive adhesive layer, acrylic resin, vinyl acetate resin, vinyl chloride-vinyl acetate copolymer, polyamide resin, polyester resin, styrene There are a heat-sealing type using a thermoplastic resin such as resin, chlorinated polypropylene and chlorinated rubber, and a thermosetting type using a thermosetting resin such as urethane resin, epoxy resin and phenol resin.

Further, as the pressure-sensitive adhesive, a rubber-based resin,
An adhesive or a microcapsule type adhesive using an acrylic resin or the like is used. One or two or more resins are selected from the above-mentioned adhesives according to the material of the object to be transferred and the use of the transferred product. As a method of applying these adhesives, known coating methods such as gravure coating, roll coating, comma coating, and screen printing can be used. However, when the decorative layer itself has sufficient adhesiveness, or when an adhesive layer is formed on the transfer object side, the adhesive layer in the transfer layer may be omitted.

Examples of the transfer object include a metal plate such as aluminum, iron, titanium, and copper; a plastic sheet or a plastic plate such as polyester, ABS, polyvinyl chloride, acrylic resin, polycarbonate resin, and phenol resin;
Long strips such as glass, ceramic plates such as ceramics, wood plates (plywood or veneer), veneers, and FRP plates are used.

The holding jig 3 is made of metal, ceramics, rubber, synthetic resin, wood, or the like. Alternatively, a hard material such as metal, ceramics, and wood may be coated with a soft material such as paper, nonwoven fabric, or a synthetic resin sheet. The transfer step is performed by pressing the transfer sheet with a silicone rubber roll or the like. When using a pressure-sensitive adhesive, only pressurization is sufficient.However, when using a heat-sensitive adhesive, the silicone rubber roll is heated and pressed, or the transfer target or transfer sheet is preheated and then pressed with a roll. And adhere to the transfer object.

[0028]

The present invention will be described below in further detail with reference to examples. (Example 1) As shown in FIG. 3A, a biaxially stretched polyethylene terephthalate film (manufactured by Toray Industries, Inc.) having a thickness of 25 μm was used as a substrate 11, and one side of this film contained a silicone release agent. The release layer 12 was formed by gravure printing using an acrylic resin ink (manufactured by Showa Ink Industry Co., Ltd.) so that the coating amount was 1.0 g / m ² as a dry matter. On the release layer 12, decoration is performed by gravure printing a grain pattern using a gravure ink ("BCT" manufactured by Showa Ink Industries, Ltd.) using a mixture of an acrylic resin and a vinyl chloride-vinyl acetate copolymer as a binder. Layer 13 was formed. Furthermore, on the decoration layer 13,
Using an adhesive of vinyl chloride-vinyl acetate copolymer system (manufactured by Showa Ink Industries, Ltd.), the adhesive layer 14 is dried by gravure coating so that the coating amount after drying becomes 1.0 g / m ^2.
Was formed to produce the transfer sheet 1.

Next, using the above-mentioned transfer sheet, it was transferred to the following aluminum plate for blinds. As an aluminum plate for blinds, thickness: 0.1 mm, width: 75 mm, length: 1
The one having a size of 000 mm was used. First, FIG.
As shown in (b), the transfer sheet 1 is superimposed on the aluminum plate of the transfer object 2 with the adhesive layer 14 on the surface thereof, and the transfer sheet 1 is heated and pressed by a heated silicone rubber roll from the base 11 surface of the transfer sheet 1. After cooling to room temperature,
The transfer sheet 1 was bonded to the aluminum plate 2. Transfer sheet 1
As shown in FIG. 1, the width L ₁ of the transfer sheet ₁ is 6 mm larger than the width L ₂ (75 mm) of the aluminum plate, and the transfer sheet protrudes from both sides of the aluminum plate. Each of the portions d was 3 mm. The gap Δx between the holding jig 3 and the transfer object was 120 μm on both sides (four times the total thickness of the transfer sheet).

Next, as shown in FIG. 1, pressing jigs 3 are pressed against both sides of the transfer sheet 1 laminated on the transfer object.
The protruding portion d of the transfer sheet is bent at an angle of + 90 ° with respect to the transfer surface of the transfer object in a direction approaching the transfer surface of the transfer object, and the transfer object 2 on which the transfer sheets are stacked is shown in FIG. While being moved in the flow direction, the protruding portion d of the transfer sheet was bent in the longitudinal direction of the aluminum plate 2 by the holding jig 3 as shown in FIG. As the holding jig 3, an iron-made jig having a surface coated with a fluororesin was used. After forming the bent portion 4 on the transfer sheet 1, as shown in FIG.
As a result of peeling the base material 11 of the transfer sheet 1 laminated on the above-mentioned transfer object, the transfer sheet 1 can be peeled without generating burrs at all, and the deburring step becomes unnecessary.

Example 2 A transfer sheet 1 was produced in the same manner as in Example 1. This transfer sheet was formed on both sides of the aluminum plate 2 used in Example 1 in the same manner as in Example 1 except for the protruding portion d.
And adhered. Next, the protruding portion d of the transfer sheet 1 is pressed down by the pressing jig 3, and the protruding portion d is bent up and down so as to be in contact with the side surface of the aluminum plate 2 as shown in FIG. A bent portion 4 was formed along the longitudinal direction of the aluminum plate 2. Thereafter, as in Example 1, as a result of peeling the base material 11 of the transfer sheet 1, the transfer sheet 1 could be peeled without any burrs, and the deburring step became unnecessary.

Comparative Example 1 In the same manner as in Example 1, a transfer sheet was prepared, transferred to an aluminum plate by heating and pressing with silicone rubber, the transfer layer was cooled, and then the protruding portion d was bent. However, when the substrate 11 of the transfer sheet 1 was peeled off by a conventional method, burrs were remarkably formed on both sides of the transfer surface of the aluminum plate, and a deburring step was required as a post-process.

(Comparative Example 2) A transfer sheet 1 was prepared and transferred to an aluminum plate 2 in the same manner as in Example 1 except that a polyester-based additive was added to the release layer when the transfer sheet was prepared. The substrate 11 of the transfer sheet was peeled off by the method described above. As a result, the generation state of burrs differs depending on the transfer conditions such as the transfer temperature and the transfer speed, and stable transfer conditions free of burrs cannot be obtained. Therefore, a deburring step was required as a post-process.

[0034]

As described above, according to the present invention,
When a transfer sheet having a decorative layer such as a printed pattern is used for transfer to a long transfer object such as an aluminum plate for blinds, burrs do not occur on the transfer object. That is, the width of the transfer sheet is made slightly wider than the width of the long transfer object, and the transfer sheet is adhered so that the protruding portions of the transfer sheet remain on both sides of the transfer object. After the adhesive is sufficiently adhered to the transfer object via, the protruding portion of the transfer sheet laminated on the transfer object is bent perpendicularly to the surface of the long transfer object, so that the crease is formed on the transfer layer. In addition, when the transfer sheet substrate is peeled off, the transfer layer is cut off from the fold, and burrs do not occur even when the transfer object is long.

In the case of a long plate-like transfer object such as an aluminum plate for blinds, a transfer sheet is adhered to both sides of the long transfer object, and the transfer sheet is protruded in the same manner as described above. By bending the portion up or down along the side of the transferred object, the transfer layer on the front and back of the transferred object is creased, and when the transfer sheet substrate is peeled off, the transfer layer is cut off from the crease. The transfer layer can be cleanly transferred to both sides of the aluminum plate without occurrence.

As a result, the deburring step is not required in the post-transfer process, so that the working process is shortened,
Production efficiency can be improved. Further, since there is no need to add an additive to the transfer layer, the additive does not cause deterioration of the abrasion resistance properties of the transfer layer.

[Brief description of the drawings]

FIG. 1 is a schematic plan view showing a transfer method of the present invention.

FIG. 2 is a schematic sectional view showing a transfer method of the present invention.

FIG. 3 is an explanatory view when a transfer sheet is transferred to one surface of a transfer target body by the transfer method of the present invention, and (a) is a schematic cross-sectional view of the transfer sheet. FIG. 4B is a schematic cross-sectional view when the transfer sheet is adhered to the transfer target. FIG. 3C is a schematic cross-sectional view when the sheet substrate is peeled off after the transfer sheet is adhered to the transfer object.

4A and 4B are explanatory diagrams when a transfer sheet is transferred to both surfaces of a transfer object by the transfer method of the present invention. (A) A protruding portion of the transfer sheet is bent so as not to be in contact with a side surface of the transfer object. It is the figure which formed the part. FIG. 4B is a diagram in which a protruding portion of the transfer sheet is bent so as to be in contact with a side surface of the transfer target body to form a bent portion.

[Explanation of symbols]

REFERENCE SIGNS LIST 1 transfer sheet 2 transferred object (aluminum plate) 3 holding jig 4 bent portion 11 base material 12 release layer 13 decorative layer 14 adhesive layer L ₁ transfer sheet width L ₂ transfer object width d protruding part Δx holding jig Between the tool and the object

Claims (1)

[Claims] In the step of transferring to a long transfer object using a transfer sheet having a transfer layer including at least a decorative layer on a substrate, a transfer wider than the width of the long transfer object. A step of laminating a sheet on one or both surfaces of a long transfer-receiving body, a step of pressing the laminate, or a step of bonding a transfer sheet to the transfer-receiving body by applying heat and pressure, and a step of laminating the transfer-receiving body A step of bending a portion of the transfer sheet having a width wider than the width of the transfer target body in a direction perpendicular to the longitudinal direction of the long transfer target body, and thereafter, a step of peeling off the transfer sheet base material. A transfer method which facilitates peeling of a transfer sheet substrate.