WO1983001757A1

WO1983001757A1 - Transfer printing method

Info

Publication number: WO1983001757A1
Application number: PCT/JP1982/000432
Authority: WO
Inventors: Nippon Insatsu Kabushiki Kaisha Dai; Kagaku Kogyo Kabushiki Kaisha Fukubi
Original assignee: Nagai, Koji
Priority date: 1981-11-13
Filing date: 1982-11-09
Publication date: 1983-05-26
Also published as: KR860001848B1; KR840002299A

Abstract

After a solvent having the property of partly dissolving or swelling transfer sheet (A) provided with a printed pattern (3) on a peelable sheet (1) is coated onto at least one of the sheet (A) and a material (12) to which the pattern is to be transferred, the sheet (A) and the material (12) are superimposed with the coated surfaces disposed inside. The resultant laminate is compressed, the peelable sheet is then peeled off, so that the pattern is transferred to the material. Since this method is carried out substantially without heating, it is suitable for transfer printing of materials having a low heat resistance.

Description

Fine transfer printing method

Technical field

The present invention relates to a transfer printing method. More specifically, the present invention relates to a transfer printing method in which an interface between a transfer sheet during transfer and an object to be transferred is transferred in a state of being moistened with an activating liquid. The present invention relates to a transfer printing method capable of efficiently obtaining a transfer printed material having a pattern firmly adhered to a transfer target without heating. Background art

The transfer printing method is a method in which a pattern to be transferred to an appropriate sheet is printed once to create a transfer sheet, and the transfer sheet is used to transfer the pattern to a transfer target. When it is difficult to remove materials such as heavy objects, long objects, or objects with rough surfaces, or when direct printing is possible, the amount of printing per operation is small. This method is used when the target is expensive and loss is likely to occur, and is a convenient method in that the necessary quantity can be printed each time it is needed.

Conventional transfer printing methods include, for example, a method in which a heat-sensitive transfer sheet formed by sequentially forming a printing layer and, if desired, a heat-sensitive adhesive layer on a peelable sheet is subjected to ABS- (acrylonitrile). (Lyrnostyrenbutadiene copolymer) AS (acrylonitrile) (Linole / styrene copolymer) or plastic moldings such as polyvinyl chloride, etc., and are added by a heating roll and heated. In this method, a printing layer or a heat-sensitive adhesive layer provided as required is thermally activated to perform transfer, and is usually referred to as "hot standing".

In the conventional transfer printing method described above, activation is performed by heat I generated from a heating roller or the like to generate the adhesiveness necessary for transfer. It enables high-efficiency, uniform, and high-strength transfer printing. Since such a transfer method has a thermal force such as a heating hole, it is used for transfer printing to a transfer target such as a molded body made of a synthetic resin having a low softening point and a foamed synthetic resin which is easily softened by heat. When the transfer is performed, the transferred object is thermally deformed.This is not preferable because the heat is liable to be degraded. Inconvenience that it is not possible to achieve the purpose of the transfer of the invention Disclosure of the invention

The present invention provides a non-heating type transfer printing method which enables good stake printing on a tilled object having poor heat resistance, in consideration of the above-mentioned drawbacks of the conventional heat transfer printing method. Purpose.

The present inventor has studied. If the transfer is carried out at the interface between the transfer sheet and the object to be transferred by co-existing with an activating liquid having an action of dissolving or swelling at least one of these contact surfaces. It has been found that good transfer printing is possible.

The transfer printing method of the present invention is based on the above findings. More specifically, a transfer sheet having a print pattern provided on a peeling surface of a peelable sheet is prepared. When the transfer sheet and the object to be transferred are overlapped so that the printed pattern forming surface of the transfer sheet and the object to be transferred are in contact with each other, the transfer sheet and the object to be transferred are overlapped. At the interface, an activating liquid containing a solvent that has the effect of dissolving and swelling at least one of the contact surfaces of the transfer sheet and the object to be transferred is coexistent, and then the laminated body is pressed and printed. The method is characterized in that the pattern is transferred to the surface of the transfer object, and then the peeling sheet is peeled off.

The preferred embodiments of the transfer printing method of the present invention will be described in detail with reference to the drawings. BRIEF DESCRIPTION OF THE FIGURES

FIG. 1 is a sectional view in the thickness direction showing an example of a transfer sheet used in the present invention, and FIGS. 2, 4 and 6 each show an example of an apparatus used in the transfer printing method of the present invention. FIGS. 3 and 5 are schematic cross-sectional views in the thickness direction of an example of a transfer product obtained by the method of the present invention.

O PI

"One BEST MODE FOR CARRYING OUT THE INVENTION

As the transfer sheet used in the present invention, a known transfer sheet can be used. For example:> As shown in Fig. 1, on the peeling surface of the peelable sheet 1. Form a transparent coating layer 2 that becomes a protective layer after transfer, then form a printed pattern 3, and then bond as desired. A transfer sheet formed with the layer 4 is used.

As the peelable sheet 1, a sheet having at least one surface having releasability is used. More specifically, the peelable sheet 1 may be any suitable paper, for example, thin paper, woodfree paper, or any suitable plastic, for example, polyethylene.

Bolivia. Len.polyvinyl chloride, polychlorinated-lidene, polystyrene, polyester, polymido, polymethyl methacrylate, etc. Acryl luster, rubber chloride, ethylene-piteryl acetate copolymer, etc. on the surface of films or sheets such as rubber It is made by adding silicone resin or wax, etc. to the vehicle. It is made by applying a releasable paint or polyethylene resin. A resin coated with a release resin such as propylene resin by extrusion coating can be used, or an appropriate resin described above can be used. The plastic film alone may be used in consideration of the adhesive strength with the transparent film layer and printed pattern described later. The thickness of the peelable sheet is generally about 0.02 to 0.10 mm, and when a peelable coating film is provided, the film thickness is 1 to 50 mm. m is preferred.

The transparent film layer 2 may be made of any suitable vehicle, for example, ethyl cellulose port, ethyl hydrogen port, etc. ■ cell port-"" Tat prof. Styrene, styrene cellulose and other cellulose derivatives such as cellulose acetate, polystyrene, polystyrene, and polymethylstyrene. The lubricating luster and the styrene copolymer lubricating lumber, polymethyl acrylol methyl ether, polymethyl linoleic acid ethyl, polyacrylic olenoic acid ethyl ° homo- or copolymer resins of acrylic resin or methacrylic resin, such as butyryl acrylate, and resin. Modified phenolic resin.Polymerized ^α -zine, etc.Port-dinester resin, vinyl acetate resin.Coumarone resin, vinylene resin Polychlorinated vinyl resin. Polyester resin. Polyurethane resin, petital resin> Polyimide resin. One or more plasticizers and stabilizers among synthetic resins, etc. Surfactants * Waxes, greases, desiccants, auxiliary desiccants, curing agents, emulsifiers, thickeners, Filler. Add a dispersant, solvent and diluent as appropriate, and use a known printing method or a known coating method.ロ, ノレロ，イ "ナナイナイキキキキキキキススススススキキキキキキBrush coat, brush coat, silk screen painter, wire coat, wire coat , Formed by a flow coat, etc.

ί The transparent film layer thus formed is transferred together with a printed pattern described later to form a protective layer of the printed pattern. In general, a thickness of about 2 to 2 is preferable.

Next, the printed pattern 3 can be formed by a conventional ink using the same dye as that used for providing the above-mentioned transparent coating layer, and the known printing method can be used. Gravure printing, gravure offset printing, lithographic offset printing, dilitho printing, letterpress printing, intaglio printing, _four- jet printing, It can be provided by silk screen printing, electrostatic printing, or the like. The coating amount of the printed pattern 3 is preferably about 210 g nom ² .

The adhesive layer 4 serves to improve the adhesive strength with the transfer object during transfer, and may be colored as desired to form an underlayer.

As a paint for forming the adhesive layer 4, a paint using the same vehicle as that used for providing the transparent skin and the film layer can be used. The method for forming 4 can also be provided by the above-mentioned known coating or printing method. The thickness of the adhesive layer 4 is preferably about 500 Am

Further, the above-mentioned transparent film layer 2, printed pattern 3 and adhesive layer 4 may be formed of peelable sheet, transparent film layer, printed pattern, or lower layer as a base of the ink or paint. Select and use in consideration of the formation layer and the adhesion between It goes without saying.

In a preferred embodiment of the present invention, an activating liquid is applied to the transfer object before the transfer sheet is overlapped with the transfer object.

The activating liquid used for this purpose includes the adhesive layer 4 '(and preferably the printed pattern 3 and the transparent coating layer 2) which forms the surface of the above-mentioned transfer sheet, and the transfer object. At least one of them is preferably a solvent containing a solvent that does not partially dissolve or swells both, and produces the necessary tackiness for adhesion. More specifically, such a solvent may be, for example, a methanol solvent such as methanol, ethanol, isopropanol, n-butanol, or the like. Esters such as methyl acetate, ethyl acetate, improbyl acetate, 'n-butyl acetate; etc .; acetate, methyl ethynoleketane, methyl acetate Ketones such as tyrylisobutylketon and cyclohexanone; aromatic carbohydrates such as pentane, tolene, xylene and styrene Hydrogens; cyclohexane; cyclopentane '; aliphatic hydrocarbons such as π-hexane; methylsulfate; -Links, alcohol-containing ethers having alcoholic hydroxyl groups, such as methanolic ether, etc. The layer 4 (and preferably the printed pattern 3 and the transparent coating layer 2) is formed. A substance which does not dissolve or has a swelling ability with respect to the vehicle is used alone or in combination. be able to.

In addition, solvents such as those described above further suppress the drying rate of the solvent. An appropriate synthetic resin soluble in the above solvent may be added for the purpose of increasing the coating amount and improving the adhesiveness to the transfer object, and the synthetic resin added for such a purpose may be The solvent used in forming the transparent coating layer can be appropriately selected and used from among the vehicles used, and 5 to 30 parts by weight of the above solvent (100 parts by weight) is used. Can be added.

Further, as described above, the activating liquid preferably has a function of partially dissolving or swelling the transferred body, and in the combination with the transferred body, the following will be described. Activating solution is preferably used

A method for applying the activating liquid as described above to the transfer target

f O PI Examples of the method include a known coating method, for example, the same method as the method for forming the above-mentioned transparent film layer. The amount of the activating liquid applied is 5 to 30 g Z'm. ² (when wet

:) is appropriate. :

Next, the printed surface of the printing medium to which the activating liquid has been applied is overlapped with and pressurized so that the printed pattern of the transfer sheet or the adhesive layer to be provided as desired is in contact with the transfer sheet. The image is transferred to the surface of the transfer object, and then the peelable sheet is separated. '

Next, the printed surface of the printing medium to which the activating liquid has been applied is overlapped with and pressurized so that the printed surface of the transfer sheet or an adhesive layer provided as required is in contact with the printed pattern. Is transferred to the surface of the object to be transferred, and then the peelable sheet is peeled off.

The above-described transfer process can be performed, for example, using a transfer device formed according to an existing laminator. FIG. 2 shows an example of an apparatus used in the transfer printing method of the present invention. The transfer sheet A supplied from the supply roller 11 was coated with an activating liquid in advance. The object to be transferred 12 is placed and moved on a pellet 13 which is superimposed on the object to be transferred 12 by the press rolls 14a and 14b, and added. After peeling, the peelable sheet is separated and reaches 15.

The conditions of pressurization by the pressurizing rolls 14a and 14b differ depending on the transfer sheet, the activating liquid and the object to be transferred. It can be performed at a pressure of 1 to 5 kg / cm.

By the transfer printing as described above, a product whose laminated structure is shown in Fig. 3 is obtained.

The preferred embodiment of the transfer printing method of the present invention has been described above. However, various modifications of the above-described embodiment can be made within the scope of the present invention. For example, the following modifications are possible.

The activating liquid can be applied to the transfer sheet 12 after applying the adhesive layer 4 of the transfer sheet instead of the transfer medium 12. In this case, application of the activating liquid is performed by contacting the activating liquid 17 filled with the kin. The excess amount of the activating liquid entrained on the σ-rule 18

The paper roll 1 was scraped off by the roll 4 and adjusted in this way.The roll roll 18 wet with the activating liquid 18 and the roll π ^ ~ roll 9 By activating the transfer sheet A sent from step 1, the activator for the four adhesive layers on the transfer sheet may be applied. In this case, the application amount of the activation liquid is

5 to 30 g / m ² force as in the above embodiment. The subsequent transfer operation itself is the same as in Fig. 2.In this case, care must be taken to control the application manner so that the pattern of the pattern does not blur due to the application of the activating liquid. However, when the transfer surface of the transfer object forms a curved surface, uneven surface, or vertical surface, the liquid on the transfer surface Since the flow can be prevented, a better transfer effect can be obtained.

The activating solution may be applied to both the transfer object 12 and the transfer sheet A. During this: is a coating amount, other example if against to the transfer body 5 to 1 0 g Roh ^{m 2, 3 ~ 9 g Ζ} πι 2 is Ru suitable der the transfer sheet. The activating liquid applied to the transfer object and the transfer sheet may have different compositions so as to dissolve or wet each.

1 In this embodiment, good transfer can be obtained, particularly when the object surface is a curved surface or a vertical surface, and the adhesion between the transfer pattern and the object surface is also good.

It is not always necessary to provide the transparent film layer 2 and the adhesive layer 4 in the transfer sheet. For example, when the printed pattern after transfer does not require much durability, the transparent film layer 2 can be omitted, and when a protective layer is provided in another process after transfer, this transparent film layer can be used. Can be excluded. Further, the adhesive layer 4 has a sufficient thickness of the printed pattern 3 and the transparent film layer 2. If the transfer is not hindered, it can be omitted. '

On the other hand, when the printed pattern after transfer is particularly required to be durable. For example, as shown in FIG. 3, the printed pattern of the product or the product obtained by removing the transparent film layer 2 from the product, as shown in FIG. As shown in the figure, for example, a protective layer 5 having a thickness of 100 to 100 m can be provided.

'Ο ΡΙ The protective layer 5 can be formed by a known method using an ordinary coating method. The paint layer is the same as that used for forming the transparent film layer described above.力 Force to select from the middle of the cycle It is preferable to use a hardening type of cycle for the purpose of further improving the surface strength, and the transfer object is made of thermoplastic synthetic resin. When using a material that does not have relatively high heat resistance, use a coating composed of an ultraviolet-curable compound or a coating composed of an electron-beam-curable compound. By irradiating with light and curing, it is possible to form the protective layer without damaging the object to be transferred by heating when forming the protective layer.

If desired, the protective layer may be finely divided silica, calcium carbonate, or the like, and may be adjusted to a predetermined degree, or may be colored with appropriate transparency.よ Ο

By forming such a protective layer, it is possible to protect the printed pattern and to improve the surface properties.

2 and 4, the peelable sheet is immediately peeled off after the transfer, but the peelable sheet is peeled off for an appropriate time after the transfer, for example, 6 hours. You may hold it for more than 0 seconds, preferably for more than 60 minutes, and then go for power. In this case, drying of the activation liquid by scattering into the air is hindered. In particular, when the transfer target receives the penetration of the activation liquid, the adhesion strength is improved, which is preferable. As shown in Fig. 6, corresponding to Fig. 2, a pair of rolls is required to hold the peelable sheet after the transfer. This can be achieved more easily by adding 20a and 20b, and if the transfer is performed in a patch using, for example, a flat plate, an arbitrary length of holding time can be obtained.

As described above, according to the present invention, efficient and reliable transfer can be performed without using a heating means, and the resulting transferred printed matter is subjected to a stencil printing method in which the adhesion strength of a printed pattern is large. I can. Therefore, according to the method of the present invention, transfer printing can be performed on a heat-deformable or heat-degradable transfer object without damaging those materials. Transfer printing is possible even if it is weak to E, and the occurrence of transfer omission (such as a hole) due to clearing of bubbles can be prevented without heating. In particular, if the activating liquid is applied to the object to be transferred in advance, even if the surface of the object to be transferred is rough, it can be filled with the activating liquid and flattened. This prevents the occurrence of pinholes, and also enhances the bonding strength by causing the activating liquid to form so-called bonding feet (anchors) in the recesses on the rough surface.

Hereinafter, examples for illustrating the present invention more specifically will be described.

Example 1

Polyethylene resin is applied on one side of thin leaf tongue (basis weight 30 g / m ² ) to a thickness of 30 m by extension coating. A peelable sheet was prepared as a peeling surface. Chlorinated on the peeling surface of the peelable sheet obtained.

OMH ~ / Print the pattern by gravitational printing using a polyvinyl chloride sheet printing ink consisting of ク Hycura ^, which is mainly composed of a copolymer of nickel acetate. Coating amount 6 g / m ² ) A transfer sheet was prepared.

A 200 mm wide, 200 mm long, 10 mm thick unplasticized polychlorinated vinyl extrusion plate with foam resin filled in the voids as the transfer object Prepare an activated liquid with the following composition by the mouth coating method so that the applied amount (when wet) is 5 g Zm ^2, and apply immediately after coating. The surface of the transfer body coated with the activating liquid and the printing surface of the transfer sheet were pressed together with a rubber π-roll under the conditions of a linear pressure of 2 g / cm. To obtain a transfer body with the pattern transferred on the surface of the transfer object.

Activation liquid composition

Polychlorinated resin 15 parts by weight

Finished resin 5 "

Ethyl acetate 6 0

Toruen 0 〃

Methinolethylene 0 0 II

Example 2

As in Example 1, the peelable sheet was not peeled immediately after the pressurization, but was left for 24 hours without any change.> The peelable sheet was difficult.

The transcript obtained as described above was obtained according to Example 1. Example 3 The adhesion strength of the pattern was improved on the obtained transfer body.

The ballistic film (thickness) is used as a peelable sheet.

50 im), and on one side of the film, glabia solid printing using a transparent paint containing vinyl chloride vinyl acetate copolymer and ethylene resin transparency protective layer by Ri entire surface (provided the thickness, then by the same pair arsenide click le or Ranaru I ¹ down key have use the in pattern (coating amount 5 g / m ²

) Is printed, and then a composition mainly composed of polyvinyl chloride resin is applied over the entire surface by gray printing (coating amount: 5 g nom ² ) to form an adhesive layer. Thus, a transfer sheet was prepared.

Thereafter, a transfer member having a protective layer on the surface was obtained in the same manner as in Example 1.

The transfer member obtained has an improved abrasion resistance and pattern adhesion on the surface in addition to the transfer member obtained in Example 1.

Examples 4 to 6

The procedure was repeated in the same manner as in Example 1 except that the activating solution was applied on the pattern forming surface of the transfer sheet, not on the object to be transferred, so that the application amount (when wet) was 5 gZm ² . By repeating the operation of step 3, the transcripts almost equivalent to those of Examples 1 to 3 were obtained.

Examples 7 to 9 _

Ο ΡΙ ~ The activating liquid was applied in the same manner as in Examples 1 to 3 except that the activating liquid was applied on the pattern-formed surface of the transfer object and the transfer sheet so that the application amount (when wet) was 5 g Zm ² each. The operation was repeated. :

As a result, a transcript almost corresponding to Examples 1 to 3 was obtained. ! Industrial applicability

As is clear from the above description, the transfer method of the present invention can be used to transfer a thermoplastic resin having poor heat resistance or a foamed product thereof, and a transfer to a transfer target having a rough surface such as wood. Shows excellent suitability for printing. .

'' O OMPPII

Claims

Scope of the request Nishi Prepares a transfer sheet in which a printed pattern is provided on the detached surface of the peelable sheet, and forms a printed pattern on the transferred sheet and the object to be transferred. When the transfer sheet and the transfer object are overlapped so that they contact each other, at least one contact surface between the transfer sheet and the transfer object is melted at the interface between the transfer sheet and the transfer object. An activating liquid containing a solvent having a swelling action is also coexistent, and then the superimposed body is pressed to transfer the print pattern onto the surface of the transfer-receiving body, and then the peeling sheet is peeled off. Printing method

2. The method according to claim 1, wherein the activating liquid is applied to the transfer target prior to the transfer.

3. The method according to claim 1, wherein an activating liquid is applied to a print pattern forming surface of the transfer sheet prior to the transfer.

4. Prior to transfer, apply the activating solution and transfer medium

The method according to claim 1, wherein the method is applied to both of the printed pattern forming surfaces.

5. The activating solution is added to the solvent in addition to 100 parts by weight of solvent.

The method of claim 1 wherein the soluble resin comprises 5 to 30 parts by weight of the soluble resin.

6. The method according to claim 1, wherein the transfer sheet has a transparent resin film between the peelable sheet and the printed pattern.

7. The transfer sheet is printed on the printed pattern and adheres to the transfer object.

G EL The method according to claim 1, further comprising a resin film for improvement.

8. The method according to claim 1, further comprising a step of forming a protective resin film on the printed pattern of the transferred body on which the printed pattern has been transferred.

9. The method according to claim 1, wherein after the pressure transfer, the superposed body is held for a time effective for improving the adhesion strength between the printed pattern and the transfer-receiving body.

10. The method according to claim 1, wherein the object to be transferred is selected from a thermoplastic resin molded article, a thermoplastic resin foam molded article, and wood.

O PI