JPH0247100A - Method for partly transferring transfer foil - Google Patents

Abstract

PURPOSE:To simplify an executing method and to reduce a cost by bringing a film to scarcely adhere with a transfer foil into close contact with a part not to be transferred of the surface part of a matter to be transferred, and then transferring the foil. CONSTITUTION:Plastic which is not easily softened by heat is employed as a film to scarcely adhere with a transfer foil. The film of the resin is brought into close contact with the part not to be transferred with the foil of a matter to be transferred. Generally, the resin is liquefied, and coats or is printed on a necessary part. However, if the coating or printing is difficult in a working step, the resin may be formed in the state of the transfer foil, transferred to a necessary part to form a film. Or, the resin film is desirably selected to resin having high softening temperature higher by at least 30 deg.C than the softening temperature of the molding resin of the matter to be transferred. In this respect, it is advantageously to use the curable resin. When it is thus transferred, the transfer foil is transferred to a part except the part formed with the film, thereby completing the partial transfer.

Description

[Detailed description of the invention] [Industrial application field] The present invention relates to a method for partially transferring a transfer foil.

[Conventional technology]

Conventionally, in industrial instruments, nameplates, etc., transparent plastic is temporarily left transparent in the form of letters, patterns, or rectangular windows, and other parts are made opaque by transferring hot stamp foil such as hairline patterns. Many types of products are manufactured. The manufacturing method for these products is: 1) Print ink or glue using a screen printing method, leaving transparent letters, patterns, windows, etc. as white outlines, and then apply transfer foil only to the printed areas. Method of transcription (Special Publications 1984-
9708, etc.), or (2) When manufacturing transfer foil, first print water-based glue etc. on the white areas, vacuum evaporate aluminum, then wash with water, and apply aluminum 1 on the white areas.
A method using a transfer foil that has undergone partial vapor deposition by removing the film (such as Utility Model Publication No. 24 of 1973), or ■ Covering the white part of the object with masking tape, masking ink, etc. The method used was to transfer a transfer foil to the front surface, then peel off the masking material and create a window.

[Problem to be solved by the invention]

However, in conventional technology (2), since the transfer foil is transferred onto the ink surface, the transfer surface protrudes significantly from the base plate surface, creating a step.
Furthermore, when viewed from the back side, the transfer foil is seen through the ink surface, which has the disadvantage that the gloss of the foil is impaired. Furthermore, the border line printed by screen printing also had screen marks, which did not necessarily result in a clean finish. Manufacturing the partially vapor deposited foil (2) required many man-hours and could not meet demand in a short period of time, and the foil itself was not versatile and was considerably more expensive than -C foil. (3) has the drawbacks that it takes time to attach and remove the masking material, and hot stamping often causes clouding in the masked area, and in practice, it is difficult to mask minute shapes.

The present invention has been made to correct the above-mentioned drawbacks, and its object is to provide a foil that is easy to implement, inexpensive, and does not need to be peeled off once it has been bonded. By providing a transparent film, it eliminates the trouble of peeling off the masking material in the manufacturing method of windowed instruments and nameplates, and eliminates the problem of unevenness on the foil surface by directly transferring the transfer foil to the surface of the transferred object. The appearance from the back side is also good, and the remaining film protects the window from friction chemicals, etc., and the use of inexpensive general-purpose foil reduces the cost of using expensive partially vapor-deposited foil. In addition to providing a method for obtaining the same, it also provides a simple method for producing multicolor transfer prints that are beautiful on both the front and back by coloring the film, thereby expanding demand and contributing to the development of industry.

[Means to solve the problem]

The above problem is solved by a method for partially transferring a transfer foil onto an object, as set forth in claim (1), in which the transfer foil does not require transfer among the surface portion of the object. This is achieved by first forming a coating on a portion to which the transfer foil is difficult to adhere, and then transferring the transfer foil only to the necessary portion.

In general, transfer foils adhere to the surface of the foil by a heat-sensitive adhesive applied to the surface of the foil, which is softened and melted by the heat during transfer and entangles with the surface of the object to be transferred. Therefore, it is necessary to heat the heat-sensitive adhesive to a temperature at which it sufficiently softens and melts, and pressure is necessary to cause it to become entangled.

When the material to be transferred is made of fibrous material, the surface is rough and absorbent, so that the adhesive is likely to get entangled therewith. On the other hand, the plastic from which the instruments, nameplate, and +i IN are made has a smooth surface and is water-retentive, but thermoplastic plastic softens when heated, so pressure is applied to entangle the adhesive of the transfer foil. I can do things. At this time, if the softened surface of the plastic and the adhesive of the foil have affinity for each other, the entanglement will progress more easily. However, it is difficult to adhere to plastics that do not soften due to heat during hot stamping using only the adhesive strength of the adhesive when it is melted.

The present invention is a method of partial vapor deposition that takes advantage of the fact that the surface condition of the object to be transferred and the foil adhesive make the transfer difficult when transferring the transfer foil.

In the present invention, as the film to which the transfer foil is difficult to adhere, a plastic material that does not easily soften due to heat is used. Such plastics include epoxy resin, polyester resin,
Examples include urethane resin, phenol resin, melamine resin, diallyl phthalate resin, etc. Furthermore, polyamide resins, acrylic resins, cellulose resins, etc. can also be used after being cured with additives such as isocyanates. Further, ultraviolet curable resins, electron beam curable resins, etc. are also preferable because their cured films are heat resistant.

Next, in order to form a coating of these resins in close contact with the portions of the transfer target where the transfer foil is not desired to be transferred, this is generally done by turning the resin into a liquid and coating or printing it on the necessary portions. However, if coating printing is difficult due to the work process, these resins may be made in the form of a transfer foil and transferred to the required areas to form a coating.

In fact, by using transfer foil, you can make superior products. For these resin coatings, it is preferable to select a resin that has a softening temperature that is at least 30°C higher than the softening temperature of the molded object (the softening temperature of the fat).It is advantageous to use point-curing resins. be.

In addition, when forming a resin film in the form of a transfer foil, the foil is made by applying the resin solution to a base film and further applying an adhesive. Moreover, since some commercially available transfer foils are made from the above-mentioned resin coating, such transfer foils may be reused.

Further, a commercially available transfer foil can be used for transferring only the necessary portions of the transferred object. In this case, it is necessary to select and use a foil that will not be transferred to the resin coating. The selection criteria can be used in many cases by selecting a foil that cannot be overprinted (double stamped). This is because there is no affinity between the resin coating and the foil adhesive.

To carry out the present invention, a thin film of resin to which the transfer foil does not adhere easily is formed on the part of the object to be transferred to which the transfer foil is not desired to be transferred, by means of coating or transfer, and then the transfer is performed on the thin film of the resin to which the transfer foil is difficult to adhere. Place the transfer foil to be transferred, use a top-down transfer machine, a roll-type transfer machine, etc., and apply heat and pressure to transfer.

Although the transfer temperature varies depending on the object to be transferred, good results are obtained if the transfer is performed at a temperature and pressure slightly lower than the general transfer conditions. This is to make the difference in surface condition as wide as possible (and to ensure sufficient selectivity).If this film is applied as a transfer foil, the release agent will remain on the surface, so the result will be good. When transferred, the transfer foil is transferred except for the part where the film was formed,
Partial transfer is completed.

[Effect]

In the present invention, unlike the masking method, there is no need to peel off the masking film after transfer, and there is no need to use expensive partially vapor-deposited foil. Furthermore, the film remains in close contact with the surface of the object to be transferred without the foil being transferred. So the instrument,
In the case of products with windows such as nameplates, a colorless and transparent resin film may be used as the coating. Conversely, by arranging colored coatings in a pattern and transferring foil to the entire surface, it is possible to create a beautiful decorative board with a colored pattern on the entire foil transfer surface. At this time, if a transparent plate is used, the pattern can be seen from the front and back.

In many cases, the film remaining on the window portion, etc. has better heat resistance, abrasion resistance, chemical resistance, etc. than the plastic body of the transferred object, and therefore has the effect of protecting the window portion, etc.

In addition, when the coating for the window portion is formed on a transfer foil and transferred, the difference in thickness between the window portion and other transfer foil portions can be almost eliminated. As a result, the border becomes clear when viewed from the back side. This is because the transfer foil did not adhere and remained on the film.
This is because the boundary line with the transferred foil is reproduced extremely faithfully and there is no overlap. Therefore, with the partial transfer of the present invention, even delicate and precise patterns can be faithfully reproduced.

C Example] Hereinafter, the present invention will be specifically explained with reference to Examples.

Example 1 An ink solution prepared by mixing a polyester ink (Jujo Kako ■, No. 9350) and a hardening agent (Isocyanfoot) was applied to the surface of a heath film (polyester film coated with a release agent) for transfer foil. Apply a layer of salt-vinyl acetate heat-sensitive adhesive (Toyo Ink 1 No. 7) on top of that.
I made transparent transfer foil. This transparent transfer foil was transferred to the center of a transparent vinyl chloride board using a silicone rubber plate and a top-bottom hot stamp machine for 130"C1) and 0 seconds in order to form a square window of 15n x 40cm. Next, Murata Kinpaku Co., Ltd.'s hairline gold foil for plastics was placed on the entire surface of the PVC board and transferred to the entire surface using a roll transfer machine.The entire surface was gold-colored with a 15 x 40 ml transparent window in the center of the PVC board. We were able to create a board with a hairline pattern.The window was transparent and free of fog, and the border between the window and the hairline foil was clear and free of distortion.

Example 2 Using Murata Kinpaku Co., Ltd.'s transparent wear-resistant 7T3 (the surface is a cured acrylic resin), in the same manner as in Example 1, a window of 151) + * Murata Kinpaku Co., Ltd. No. 3 gold transfer foil for plastics was placed and the entire surface was transferred in the same manner. I was able to create a completely golden slope with a transparent window in the center of the acrylic board. There was no fog on the windows and the boundaries were clear.

Example 3 Transparent EB foil manufactured by Dainippon Printing ■ (using electron beam curing resin film)
A floral pattern composed of thin lines was printed on a transparent vinyl chloride board using a silicone rubber plate at 120°C, 1.
Transferred in 2 seconds. Next, Reikosha's silver hairline foil for plastics was placed on the entire surface of the PVC board, and the entire surface was transferred using a roll transfer machine.

We were able to create a decorative board with a transparent perforated pattern accurately cut out on the silver hairline surface.

Example 4 A floral pattern was transferred to a transparent acrylic board using Murata Kinpaku Co., Ltd.'s gold-colored plastic transfer foil (the surface is made of amino resin), a foil that cannot be overprinted. Subsequently, the same silver foil as above was placed on the entire surface of the acrylic board, and the entire surface was transferred. I was able to make a decorative board with golden flowers on a silver background. This decorative board could have a similar pattern when viewed from either the front or the back.

Example 5 A geometric pattern was printed on a transparent acrylic resin board using three colors of red, blue, and yellow Ebilight ink (epoxy resin) manufactured by Jujo Kako ■. After this was left at 60°C for 2 days, Murata gold leaf No. 3 gold for plastics was transferred to the entire surface. I was able to make a decorative board with a geometric pattern in three colors when viewed from either the front or the S side.

[Effects of the Invention] As described above, the present invention has a pattern that cannot be transferred with a transfer foil,
This is a method of partially transferring characters, figures, etc. by forming them on the necessary areas and bringing them into close contact, so there is no need for masking.
Delicate and delicate partial transfers can be produced extremely easily, quickly, and at low cost without using expensive partial transfer foils.
In addition, the resulting products have excellent heat resistance, abrasion resistance, and chemical resistance, and multi-colored products can be easily made, which will greatly expand demand in this field and contribute to industrial development. It is.

Claims (1)

[Scope of Claims] (1) In a method of partially transferring a transfer foil onto an object, the transfer foil is preliminarily applied to a portion of the surface of the object that does not require transfer. A method characterized in that the transfer foil is transferred only to necessary portions by forming a film that is difficult to adhere to and then transferring the transfer foil. (2) The method according to claim (1), wherein the film to which the transfer foil is difficult to adhere is formed in close contact with the transfer foil. (3) The method according to claim (1), wherein the object to be transferred is a plastic molded object. (4) The method according to claim (1), wherein the object to be transferred is a transparent plastic, and the coating and transfer foil have a decorative effect even when viewed from the back side.