TWI647124B - Ultraviolet transfer method - Google Patents

Abstract

An ultraviolet transfer method comprising (a) a transfer film providing step of providing a transfer film comprising a layer of an elastic film substrate laminated in sequence, a pattern layer formed of an oil-soluble paint, and oil solubility a fixing layer and an activator layer; (b) a humidifying step of softening the elastic film substrate layer at 65 to 80% relative humidity; (c) a transfer step, performing vacuum coating and ultraviolet irradiation and (d) A release step of removing the elastic film substrate layer to obtain a transfer structure finished product. The ultraviolet transfer method of the present invention has a simple process, and the obtained transfer structure product has high gloss.

Description

Ultraviolet transfer method

The present invention relates to an ultraviolet transfer method, and more particularly to an ultraviolet transfer method for obtaining a transfer structure by a transfer film supply step, a humidifying step, a transfer step, and a release step.

The conventional method for transferring a pattern onto an object includes a thermal transfer method, a water transfer method, and the like, but the above transfer method usually requires a heating, adhesive or water washing process, and the object needs to have high temperature resistance or waterproof property, and The transferred object is limited. In addition, the transfer structure obtained by the above transfer method generally requires additional repainting of the clear paint to exhibit a clear gloss.

Accordingly, it is an object of the present invention to provide an ultraviolet transfer printing method which is simple in process and which can obtain a finished transfer structure having high gloss.

Therefore, the ultraviolet transfer method of the present invention comprises the following steps: (a) a transfer film providing step of providing a transfer film comprising a layer of an elastic film substrate laminated in sequence, formed of an oil-soluble paint a pattern layer, an oil-soluble fixing layer and an activator layer, the activator layer being UV-curable and at least partially permeating through the oil-soluble fixing layer into the pattern layer to be mutually miscible with the pattern layer; (b) a humidifying step, the transfer film is placed under an environmental condition of 65 to 80% relative humidity to soften the elastic film substrate layer, and obtain a humidified transfer film; (c) one turn a printing step of causing the activator layer of the humidified transfer film to face an object and evacuating, so that the humidified transfer film is attached to the surface of the object to obtain a first transfer structure a semi-finished product, wherein the first transfer structure semi-finished product is subjected to ultraviolet irradiation to cure the activator layer to obtain a second transfer structure semi-finished product, the transfer step is performed at 20 to 35 ° C; and (d) a The release step removes the elastic film substrate layer of the second transfer structure semi-finished product to obtain a transfer structure finished product.

The effect of the present invention is that the second transfer structure semi-finished product can be obtained by sequentially performing the transfer film providing step (a), the humidifying step (b) and the transferring step (c), and subsequently performing the separation. After the step (d), a transfer structure having a high gloss can be obtained.

Hereinafter, the present invention will be described in detail. Preferably, the transfer film is applied to the elastic film substrate layer layer by layer by sequentially coating the oil-soluble paint, the material forming the oil-soluble fixed layer and the activator. Formed thereon, the method of coating may be selected from, but not limited to, printing, spray coating, or roll coating.

Preferably, the elastic film substrate layer has an elongation of 100% or more so that the transfer film can be closely attached to the article. More preferably, the elastic film base material layer has an elongation of 200% or more.

Preferably, the ultraviolet irradiation energy of the transfer step is 500 mJ or more to cure the activator layer.

Preferably, the releasing step is to tear the elastic film substrate layer of the second transfer structure semi-finished product from the pattern layer.

Preferably, the elastic film substrate layer has a thickness ranging from 20 to 200 μm. More preferably, the thickness of the elastic film substrate layer ranges from 25 to 50 μm.

Preferably, the material of the elastic film substrate layer is polyvinyl alcohol, nylon, polymethylpentene, polyethylene terephthalate, polybutylene terephthalate, polyvinylpyrrolidone, Polyethylene, polypropylene or a combination thereof. More preferably, the material of the elastic film substrate layer is polyvinyl alcohol.

Preferably, the oil-soluble coating material and the material of the oil-soluble fixing layer are respectively selected from, but not limited to, SHC-UA01, SPI-UC01, SPI-UF01 or SPI-L-US01 which are commercially available from Daqin Chemical Company.

Preferably, the material of the activator layer is an activator which is curable by ultraviolet light. The activator may be selected from, but not limited to, UVAU-A01, UVAU-F01 or UVAU-C01 commercially available from Daqin Chemical Company.

Preferably, the transfer film further comprises a decorative layer between the pattern layer and the oil-soluble fixed layer. More preferably, the decorative layer is formed by applying a decorative coating to the patterned layer, and the activator layer is at least partially infiltrated through the decorative layer.

In some embodiments of the invention, the activator layer has a viscosity in the range of 50 to 200 cP.

In some embodiments of the present invention, the activator layer has a viscosity higher than 1000 cP. In the step (a), the activator layer of the transfer film is formed on a release film, and in the step ( Before b), a step (a1) of removing the release film from the activator layer is further included.

1'‧‧‧Transfer film

1‧‧‧Damped transfer film

11‧‧‧ Elastic film substrate layer

12‧‧‧pattern layer

13‧‧‧ oil-soluble fixed layer

14‧‧‧activator layer

2‧‧‧ objects

3‧‧‧UV tube

4'‧‧‧Second transfer structure semi-finished products

4‧‧‧Transfer structure finished product

Other features and effects of the present invention will be apparent from the following description of the drawings, wherein: FIG. 1 is a schematic cross-sectional view showing the step (a) of the embodiment 1 of the ultraviolet transfer method of the present invention; [Fig. 2] is a schematic cross-sectional view showing the steps (b) and (c) of the first embodiment; [Fig. 3] is a schematic cross-sectional view showing the step (c) of the first embodiment; [Fig. 4] A cross-sectional view showing the step (d) of the first embodiment and a transfer structure obtained by the first embodiment; and [Fig. 5] is a partial enlarged view of Fig. 4.

Before the present invention is described in detail, it should be noted that in the following description, similar elements are denoted by the same reference numerals.

The invention is further described in the following examples, but it should be understood that these examples are for illustrative purposes only and are not to be construed as limiting.

[Example 1]

Referring to Figure 1, step (a) of Example 1 of the ultraviolet transfer method of the present invention comprises providing a transfer film 1' comprising an elastic film substrate layer 11 laminated in sequence, which is oil-soluble. a pattern layer 12 formed by the coating, an oil-soluble fixing layer 13 and an activator layer 14 which can be cured by ultraviolet rays and at least partially penetrates through the oil-soluble fixing layer 13 into the pattern layer 12 to be produced with the pattern layer 12 Mutual solubility.

In this embodiment 1, the material of the elastic film substrate layer 11 is polyvinyl alcohol (PVA). The elastic film base material layer 11 had a thickness of 30 μm and an elongation of 250%. The pattern layer 12 is formed by applying an oil-soluble coating material SHC-UA01 by gravure printing on the elastic film substrate layer 11, and the oil-soluble fixing layer 13 is coated with a coating SPI on the pattern layer 12 by roll coating. Formed by -UC01, the activator layer 14 is formed by applying an activator UVAU-F01 to the oil-soluble fixed layer 13 by roll coating. The transfer film 1' further includes a decorative layer (not shown) between the pattern layer 12 and the oil-soluble fixed layer 13, and the decorative layer is coated on the pattern layer 12 by a decorative coating. Formed and the activator layer 14 is at least partially infiltrated through the decorative layer. The activator layer 14 has a viscosity of 150 cPs.

Referring to FIG. 2 and FIG. 3, the step (b) of the embodiment 1 includes the transfer film 1' being subjected to an environmental condition of 65 to 80% relative humidity to soften the elastic film substrate layer 11 and obtain a Humidifying transfer film 1. Next, the step (c) of the embodiment 1 comprises causing the activator layer 14 of the humidified transfer film 1 to be directed toward an object 2 and evacuating, so that the humidified transfer film 1 is attached thereto. The surface of the object 2 is obtained to obtain a first transfer structure semi-finished product, and the first transfer structure semi-finished product is irradiated with ultraviolet rays (irradiation energy of 600 mJ) by using an ultraviolet lamp tube 3, so that the activator layer 14 is cured. To obtain a second transfer structure semi-finished product 4', the step (c) is carried out at 20 to 35 °C.

Referring to FIG. 4 and FIG. 5, the step (d) of the first embodiment comprises: peeling off the elastic film substrate layer 11 of the second transfer structure semi-finished product 4' obtained in the above step (c) from the pattern layer 12, A transfer structure finished product 4 is obtained.

[Embodiment 2]

Embodiment 2 of the ultraviolet transfer method of the present invention is different from the above-described Embodiment 1 in that in the step (a), the activator layer 14 of the transfer film 1' is formed. On a release film (not shown), and the viscosity of the activator layer 14 is 1200 cPs; before the step (b), a step of removing the release film from the activator layer 14 (a1) ).

[Comparative Example 1] Thermal transfer method

The thermal transfer method of Comparative Example 1 is different from the above-described Embodiment 1 in that in the step (c), vacuuming and ultraviolet irradiation are performed under heating to 40 to 150 ° C, so that the humidified transfer is performed. The printing film 1 was attached to the surface of the article 2 to obtain the first transfer structure blank of Comparative Example 1.

[Comparative Example 2] Water transfer method

The water transfer method of Comparative Example 2 is different from the above-described Embodiment 1 in that, in the step (c), the vacuuming is not performed, and the object 2 is brought into contact with the humidified transfer film 1 instead. Activator layer 14 and pressing the elastic film substrate layer 11 of the humidified transfer film 1 into water such that the humidified transfer film 1 is attached to the surface of the object 2 for comparison The first transfer structure semi-finished product of Example 2 is further subjected to ultraviolet irradiation; in the step (d), the elastic film substrate layer 11 is not removed by tearing, and the humidified transfer is removed by water washing instead. The elastic film substrate layer 11 of the film 1 was obtained to obtain the transfer structure product 4 of Comparative Example 2.

[Comparative Example 3] Ultraviolet transfer method

The ultraviolet transfer method of Comparative Example 3 is different from the above-described Embodiment 1 in that in the step (b), the transfer film 1' is subjected to an environmental condition of 40 to 60% relative humidity, and the elastic film base is used. The material layer 11 is not softened; in this step (c), the humidified transfer film 1 in Example 1 is replaced with the transfer film 1'.

[Gloss test]

The conversions obtained in the above Examples 1 to 2 and Comparative Examples 1 to 3 were respectively obtained by using a gloss measuring instrument (purchased from Erichsen Co., model number PICOGLOSS 503). The surface highlight area of the finished printed product 4 was measured at 60° to obtain the gloss of the surface of the transfer structure finished product 4. The results are shown in Table 1 below.

It can be seen from Table 1 that the surface of the transfer structure of the transfer fabric of Examples 1 to 2 has a significantly higher gloss (92 to 95 GU) than the transfer structure finished product 4 of Comparative Examples 1 to 3, thereby producing a bright light. A smooth visual effect; in addition, the transfer structure finished product 4 of Comparative Example 3 had a noticeable crease.

In summary, the ultraviolet transfer method of the present invention can sequentially perform the transfer film providing step (a), the humidifying step (b), the transferring step (c), and the releasing step (d). The transfer structure finished product 4 having high gloss is obtained, so that the object of the present invention can be achieved.

However, the above is only the embodiment of the present invention, and the scope of the invention is not limited thereto, and all the equivalent equivalent changes and modifications according to the scope of the patent application and the patent specification of the present invention are still The scope of the invention is covered.

Claims (7)

An ultraviolet transfer method comprising the steps of: (a) a transfer film providing step of providing a transfer film comprising a layer of an elastic film substrate laminated in sequence, and a pattern layer formed of an oil-soluble paint An oil-soluble fixing layer and an activator layer, the activator layer being ultraviolet-curable and at least partially permeating through the oil-soluble fixed layer into the pattern layer to be mutually miscible with the pattern layer; (b) a humidifying step, The transfer film is under an environmental condition of 65 to 80% relative humidity to soften the elastic film substrate layer and obtain a humidified transfer film; (c) a transfer step to make the humidified transfer The activator layer of the printing film faces an object and is evacuated, so that the humidified transfer film is attached to the surface of the object to obtain a first transfer structure semi-finished product, and the first transfer structure is The semi-finished product is subjected to ultraviolet irradiation to cure the activator layer to obtain a second transfer structure semi-finished product, the transfer step is performed at 20 to 35 ° C; and (d) a release step, the second transfer is performed The semi-finished structural layer of the elastic film substrate is removed to To transfer a finished structure. The ultraviolet transfer method of claim 1, wherein the releasing step is to tear the elastic film substrate layer of the second transfer structure blank from the pattern layer. The ultraviolet transfer method according to claim 1, wherein the material of the elastic film substrate layer is polyvinyl alcohol, nylon, polymethylpentene, polyparaphenylene Ethylene glycolate, polybutylene terephthalate, polyvinylpyrrolidone, polyethylene, polypropylene or a combination thereof. The ultraviolet transfer method according to claim 3, wherein the material of the elastic film substrate layer is polyvinyl alcohol. The ultraviolet transfer method of claim 1, wherein the transfer film further comprises a decorative layer between the pattern layer and the oil-soluble fixed layer. The ultraviolet transfer method according to claim 1, wherein the activator layer has a viscosity ranging from 50 to 200 cP. The ultraviolet transfer method of claim 1, wherein the activator layer has a viscosity higher than 1000 cP, and in the step (a), the activator layer of the transfer film is formed on a release film. And before the step (b), further comprising the step (a1) of removing the release film from the activator layer.