TW201917023A - Thermal transfer film manufacturing method and heat transfer film easy to realize, with faster speed for manufacturing the transfer printing film, and the cost is greatly reduced - Google Patents

Abstract

A thermal transfer film manufacturing method comprises the following steps of. First, a glue-containing thermosetting white ink layer (or hot melt adhesive layer and a white ink layer) is prepared on one surface of a detachable carrier capable of being reused through a screen printing mode. The separation carrier is selected from one of the items consisting of a thin steel sheet with a smooth surface, a glass, and a temperature-resistant and non-absorbent sheet-shaped substance. Second, printing a color layer on the surface of the glue-containing thermosetting white ink layer (or the white ink layer) by the flat-bed digital printing machine. Third, the separation carrier is removed to obtain a thermal transfer film comprising the gel-containing thermosetting white ink layer (or hot melt adhesive layer and white ink layer) and the color layer. The invention replaces the traditional PET release film (paper) with a separation carrier; the invention can prepare a thermal transfer film as long as one screen and one flat-bed printing machine are used; as compared with the conventional screen printing technology, the manufacturing method of the invention is easy to realize, the speed of manufacturing the transfer film is fast, and the cost is greatly reduced.

Description

 Thermal transfer film manufacturing method and heat transfer film  

The present invention relates to a thermal transfer technique, and more particularly, to a method of manufacturing a thermal transfer film which does not use a release film (paper), and the thermal transfer film.

A conventional method for forming a thermal transfer film by screen printing, as shown in FIG. 1 , is generally a lithographic or screen printing method for forming a color pattern layer 2 on a PET release film (paper) 1, and then the color The white ink layer 3 is formed by pattern printing on the pattern layer 2, and a hot melt adhesive layer 4 is formed on the white ink layer by screen printing.

When the thermal transfer is performed, the transfer film is placed on the object with the PET release film (paper) 1 facing upward, and the heat transfer machine is applied with appropriate temperature and pressure to transfer the color pattern to the surface of the object, and then peeled off. Release film (paper).

The two conventional thermal transfer film manufacturing methods and the thermal transfer film are both provided with a release film (paper) as a carrier, and the release film (paper) is discarded after being used once. However, the cost of release film (paper) is high, and it can only be used in a single use, which is not economical and environmentally friendly. Furthermore, the above conventional thermal transfer film manufacturing method involves a plurality of screen printing steps, so that it is necessary to open a plurality of screens. For example, lithographic printing requires a PS plate (Presensitized Offset Plate). 1 to 2 screens; full screen printing requires 4 screens (if the color pattern layer uses 4 colors), white ink screen version 1 piece, hot melt adhesive screen version 1 piece. Various screens have different plate making costs. In order to share the cost of plate making, it is usually required that the commissioner must commission a basic quantity (for example, more than 1000 parts) in order to reduce the heat transfer cost of the single piece.

The disadvantages of the above conventional screen printing are the problems to be solved by the present invention.

The main technology of the present invention, a method for manufacturing a thermal transfer film, comprising: Step 1, forming a gel-containing thermosetting white ink layer (or hot melt) by screen printing on a surface of a reusable separator carrier The adhesive layer and the white ink layer) are selected from the group consisting of a thin steel sheet having a smooth surface, a glass, and a sheet-like substance resistant to temperature and non-suction; and step 2, in the gel-containing thermosetting white ink layer ( Or the surface of the foregoing white ink layer is printed with a color layer by a platform type digital printer; and in step 3, the separation carrier is removed to obtain a gel-containing thermosetting white ink layer (or hot melt adhesive layer and white ink layer). And a thermal transfer film of the color layer.

The thermal transfer film prepared by the above method comprises: a gel-containing thermosetting white ink layer and a color layer combined thereon.

According to another preferred embodiment of the present invention, the gel-containing thermosetting white ink layer is replaced with a hot melt adhesive layer and a white ink layer based on the above main technical features.

According to another preferred embodiment of the present invention, based on the thermal transfer film of the above main technical features, a paper film is coated on the color map layer of the thermal transfer film to form a commercially available thermal transfer film.

According to another preferred embodiment of the present invention, based on the above main technical features, a hot-melt powder is added to the gel-containing thermosetting white ink layer, or the hot-melt adhesive layer and the white ink layer to obtain a thermal transfer containing the hot-melt powder. membrane.

The effect of the invention:

The invention adopts a thin steel sheet selected from a smooth surface, a glass, a temperature-resistant and non-absorbable sheet-shaped substance (for example, Teflon cloth) as a separation carrier, and replaces the conventional PET release film (paper) with the separation carrier. The separation carrier of the present invention can be reused, and the conventional PET release film (paper) is discarded in one use, and the PET release film (paper) is expensive, and it is not economical to be discarded after one use. The present invention does not require a release film (paper) because it does not comply with environmental protection requirements, so that the problem of increased manufacturing cost and environmental protection caused by the use of the release film (paper) can be specifically solved.

The invention can be used as a thermal transfer film as long as a screen (printing a thermosetting white ink layer, a hot melt adhesive layer, a white ink layer) and a flatbed printer, compared with the above-mentioned screen printing technology. The manufacturing method of the present invention is relatively easy to realize, the speed of manufacturing the transfer film is fast, and the number of screens and the cost of plate making are specifically reduced, and the cost of thermal transfer is greatly reduced.

The heat transfer film of the present invention can be sold, and the thermal transfer film containing the hot melt powder does not use a PET release film (paper), but a lower cost sublimation paper or a coated CMC (carboxymethyl cellulose) , Carboxymethyl Cellulose) paper, also specifically solve the problem of increased manufacturing costs and environmental protection caused by the use of release film (paper).

 <Prior technology>  

1‧‧‧PET release film (paper)

2‧‧‧Color pattern layer

3‧‧‧White ink layer

4‧‧‧hot melt adhesive layer

 <present invention>  

10‧‧‧Separate carrier

11‧‧‧Glue-containing thermosetting white ink layer

12‧‧‧ color layer

14‧‧‧hot melt adhesive layer

15‧‧‧White ink layer

16‧‧‧Hot powder

17‧‧‧ mixed layer

18‧‧‧ mixed layer

20‧‧‧Heat transfer film

21‧‧‧Heat transfer film

22‧‧‧Heat transfer film

23‧‧‧Heat transfer film

24‧‧‧ Thermal transfer film

30‧‧‧ plane carrier

31‧‧‧paper film

32‧‧‧Heavy plane carrier

50‧‧‧ objects

51‧‧‧Parts

60‧‧‧Sublimation paper

Fig. 1 is a schematic view showing the structure of a conventional transfer film.

FIG. 2 is a schematic diagram showing the method and structure of Embodiment 1 of the present invention.

Figure 3 is a schematic diagram showing the method and structure of Embodiment 2 of the present invention.

Fig. 4 is a schematic view showing the thermal transfer of Examples 1 and 2 of the present invention.

Figure 5 is a schematic diagram showing the method and structure of Embodiment 3 of the present invention.

Figure 6 is a schematic diagram showing the method and structure of Embodiment 4 of the present invention.

Figure 7 is a schematic diagram showing the method and structure of Embodiment 5 of the present invention.

Figure 8 is a schematic illustration of the transfer steps of Embodiments 4, 5 of the present invention.

For the convenience of the description, the central idea expressed by the present invention in the column of the above summary of the invention is expressed by the specific embodiments. Various items in the embodiments are depicted in terms of ratios, dimensions, amounts of deformation, or displacements that are suitable for illustration, and are not drawn to the proportions of actual elements, as set forth above.

Example 1

As shown in FIG. 2, the film forming method of the present invention comprises the following steps: Step 1, forming a gel-containing thermosetting white ink layer 11 by screen printing on a surface of a reusable separating carrier 10; 2, printing a color layer 12 on the surface of the gel-containing thermosetting white ink layer 11 by a platform type digital printer; and step 3, removing the separation carrier 10 to obtain the gel-containing thermosetting white ink layer 11 and The thermal transfer film 20 of the color layer 12.

Example 2

As shown in Fig. 3, the thermal transfer film forming method of the present invention comprises the following steps: Step 1, a hot melt adhesive layer 14 is formed by screen printing on a surface of a reusable separator 10; Step 2, a white ink layer 15 is formed on the surface of the hot melt adhesive layer 14 by screen printing; in step 3, a color layer 12 is printed on the surface of the white ink layer 15 by a platform type digital printer; The separation carrier 10 is removed to obtain a thermal transfer film 21 comprising the hot melt adhesive layer 14, the white ink layer 15, and the color map layer 12.

In Examples 1, 2, the separation carrier 10 includes, but is not limited to, a thin steel sheet having a smooth surface, glass, and a sheet material resistant to temperature and non-absorption (for example, Teflon). Step 3 of Embodiment 1 and Step 4 of Embodiment 2, the manner of removing the separation carrier 10 includes, but is not limited to, a heat from a gel with a sharp thin blade, a steel sheet or a steel wire (diameter 0.03-0.05 mm). When the solid white ink layer 11 (or the hot melt adhesive layer 14) and the separation carrier 10 pass, the gel-containing thermosetting ink layer 11 and the hot melt adhesive layer 14 can be separated from the separation carrier 10. The separation carrier 10 can be used repeatedly.

As shown in Fig. 4, the thermal transfer film 20, 21 is transferred onto the surface of the object, and the thermal transfer film 20, 21 is placed with the color layer 12 facing up at the correct position of the object 50, in thermal transfer. The membranes 20, 21 are covered with a layer of spacers 51, including but not limited to a Teflon cloth, a release film (paper), and a heat-pressing member (not shown) is in contact with the spacer member 51, suitably The temperature and the number of seconds of hot pressing complete the thermal transfer. After the hot pressing is completed, the spacer 51 is removed. The function of the spacer 51 is to isolate the color layer 12 from the hot pressing member, thereby preventing the hot pressing member from damaging the color layer 12. The spacer 51 can be used repeatedly.

Example 3

As shown in FIG. 5, the present invention further includes a method of manufacturing a commercially available thermal transfer film, comprising: step 1, placing the thermal transfer film 20, 21 on a planar carrier 30 with the color layer 12 facing up, The planar carrier 30 includes, but is not limited to, a thin steel sheet, glass; step 2, the color layer 12 is wetted, and the wetting means includes, but is not limited to, rolling the color layer 12 with a water coating roller; step 3, in the wet color The layer 12 is covered with a paper film 31 coated with a separating material, which is, but not limited to, a known heat-sublimated paper, or a paper coated with CMC (Carboxymethyl Cellulose); Step 4, placing a weighted planar carrier 32 on the paper film 31, wherein the weighted planar carrier 32 includes, but is not limited to, a thin steel sheet, glass; and the weight and the true plane of the planar carrier 30 and the weighted planar carrier 32. , the paper film 31 is adhered only to the color layer 12 of the thermal transfer film 20, 21, but does not adhere to other layers; in step 5, drying at about 50-70 ° C to remove moisture; step 6, the plane carrier 30 and The weighted planar carrier 32 is removed, that is, a commercially available thermal transfer film 22 is obtained; However, it is not limited to passing from the junction of the thermal transfer film 20, 21 and the planar carrier 30 with a sharp thin blade, a steel sheet or a steel wire (diameter 0.03-0.05 mm), and the boundary between the paper film 31 and the weighted plane carrier 32. Passed. The saleable thermal transfer film 22 differs from the aforementioned thermal transfer film 20, 21 in that the commercially available thermal transfer film 22 includes a sheet of paper 12 covering the color transfer layer 12 of the thermal transfer film 20, 21. The film 31, and the paper film 31 can be removed after the thermal transfer is completed.

The manner in which the commercially available heat transfer film is subjected to thermal transfer includes placing the thermal transfer films 20, 21 in the correct position of the article 50 with the paper film 31 facing upward, to heat-press the member (not shown). The paper film 31 is contacted, and the thermal transfer is completed by an appropriate temperature and a number of seconds of hot pressing. After the hot pressing is completed, the paper film 31 is removed.

Example 4

As shown in FIG. 6, the present invention further relates to a method (1) for manufacturing a thermal transfer film comprising a hot-melt powder, comprising the steps of: step 1, forming a layer of heat-containing glue by screen printing on a separate carrier 10. a white ink layer 11; the separation carrier 10 includes, but is not limited to, a thin steel plate and a glass; and step 2, uniformly spraying the hot-melt powder 16 on the gel-containing thermosetting white ink layer 11 with a powder spreader to form a mixture Layer 17; Step 3, transferring the mixed layer 17 to a thermal sublimation paper 60 by a transfer step; Step 4, removing the separation carrier 10; Step 5, printing on the mixed layer 17 by a digital printer A color layer 12 is formed into a thermal transfer film 23 containing a hot melt powder.

Example 5

As shown in Fig. 7, the present invention further relates to a method (2) for manufacturing a thermal transfer film comprising a hot-melt powder, comprising the steps of: Step 1, using a screen on a surface of a reusable separator 10 The printing method is formed into a hot melt adhesive layer 14; the separation carrier 10 includes, but is not limited to, a thin steel plate, glass; step 2, a surface of the hot melt adhesive layer 14 is screen printed to form a white ink layer 15; Step 3, uniformly spraying the hot-melt powder 16 on the white ink layer 15 with a powder spraying machine to form a mixed layer 18; and step 4, transferring the mixed layer 18 to a heat-sublimation paper 60 through a transfer step. Step 5, removing the separation carrier 10; Step 6, printing a color layer 12 on the mixed layer 18 by a digital printer to form a thermal transfer film 24 containing a hot melt powder.

Embodiments 4 and 5, the main purpose is to increase the range of application of the thermal transfer film to the transfer article by using the hot melt powder, and the thermal transfer film 23, 24 removes the thermal sublimation paper 60 when the color layer 12 is upward. The method is disposed on the object to be transferred, and the heat transfer film 23, 24 is covered with a layer of spacers (such as the spacer 51 of FIG. 7), the spacers include but are not limited to Teflon cloth, and the release type The film (paper) is contacted with the separator by a hot pressing member (not shown), and the thermal transfer is completed by a suitable temperature and a number of seconds of hot pressing. After the hot pressing is completed, the spacer is removed. The function of the spacer is to isolate the color layer from the hot pressing member, so as to prevent the hot pressing member from damaging the color layer. This spacer can be reused.

The transfer steps mentioned in Examples 4, 5 are as follows: (as shown in Figure 8)

Step A-1, the sublimation paper 60 is laid on the surface of the mixed layer 17, 18; in step A-2, a weighted plane carrier 32 is placed on the sublimation paper 60, and the weighted plane carrier 32 includes but not Restricted to the thin steel plate and the glass; the heat-sublimation paper 60 is adhered to the mixed layer 17, 18 by the true plane and weight of the weighted planar carrier 32; and the step A-3 is dried at about 50-70 ° C to remove moisture; -4, the separating carrier 10 and the weighted plane carrier 32 are removed, that is, the step of printing the color layer 12 as described above.

Claims (13)

 A method for manufacturing a thermal transfer film, comprising: step 1, forming a gel-containing thermosetting white ink layer by screen printing on a surface of a reusable separation carrier; the separation carrier is selected Stepping from a thin steel sheet with a smooth surface, glass, and a sheet material resistant to temperature and non-suction; and step 2, printing a color layer on the surface of the gel-containing thermosetting white ink layer by a platform type digital printer; 3. The separation carrier is removed to obtain a thermal transfer film comprising the gel-containing thermosetting white ink layer and the color map layer.    A thermal transfer film produced by the method of claim 1, comprising: a gel-containing thermosetting white ink layer and a color layer bonded thereto.    A method for manufacturing a thermal transfer film, comprising: in step 1, a hot melt adhesive layer is formed by screen printing on a surface of a reusable separation carrier; the separation carrier is selected from the surface a smooth thin steel sheet, a glass, a temperature-resistant and non-absorbent sheet-shaped substance; a step 2, a screen printing method is used to form a white ink layer on the surface of the hot-melt adhesive layer; and a step 3 is performed on the white ink layer. The surface is printed with a color layer by a platform type digital printer; in step 4, the separation carrier is removed to obtain a thermal transfer film comprising the hot melt adhesive layer, the white ink layer and the color image layer.    A thermal transfer film prepared by the method of claim 4, comprising: a hot melt adhesive layer, a white ink layer bonded to the hot melt adhesive layer, and a color layer bonded to the white ink layer .    The manufacturing method according to claim 1, wherein the temperature-resistant and non-absorbent sheet-shaped substance is Teflon.    A method of manufacturing a commercially available thermal transfer film by the thermal transfer film of claim 2, 4, comprising: step 1, placing the thermal transfer film on the planar carrier with the color layer facing up The planar carrier is selected from the group consisting of a thin steel plate and a glass; in step 2, the color image layer is wetted; in step 3, a paper film coated with a separating material is laid on the color image layer; and step 4 is applied to the paper film. A weighted planar carrier is placed thereon; in step 5, the moisture is removed by drying at about 50-70 ° C; and in step 6, the planar carrier and the weighted planar carrier are removed to obtain a commercially available thermal transfer film.    A method of producing a commercially available heat transfer film according to claim 6, wherein the paper film of the step 3 is a paper selected from the group consisting of a sublimation transfer paper or a CMC (Carboxymethyl Cellulose).    A method of producing a commercially available heat transfer film as described in claim 6, wherein the weighted planar carrier 32 of step 4 is selected from the group consisting of a steel sheet or glass.    A commercially available heat transfer film produced by the method of claim 6, comprising: a gel-containing thermosetting white ink layer, a color layer bonded to the gel-containing thermosetting white ink layer, and a color combination A paper film on the layer.   A commercially available heat transfer film produced by the method of claim 6, comprising: a hot melt adhesive layer, a white ink layer bonded to the hot melt adhesive layer, and a bonded to the white ink layer a color map layer, and a paper film bonded to the color map layer _.  A method for manufacturing a thermal transfer film comprising a hot-melt powder, comprising: step 1, forming a layer of a gel-containing thermosetting white ink layer by screen printing on a separate carrier; the separating carrier is selected from a steel sheet, Or glass; step 2, uniformly spraying the hot-melt powder on the gel-containing thermosetting white ink layer with a powder spraying machine to form a mixed layer; and step 3, transferring the mixed layer to a heat through a transfer step Sublimation paper; step 4, removing the separation carrier; step 5, printing a color layer on the mixed layer by a digital printer to obtain a thermal transfer film containing the hot melt powder.    A method for manufacturing a thermal transfer film comprising a hot melt powder, comprising: step 1, forming a hot melt adhesive layer by screen printing on a surface of a reusable separable carrier; The carrier is selected from a thin steel plate or a glass; in step 2, a white ink layer is formed on the surface of the hot melt adhesive layer by screen printing; and in step 3, the hot melt powder is evenly spread on the white ink layer by a powder spraying machine. Then drying to form a mixed layer; step 4, transferring the mixed layer to a sublimation paper through a transfer step; step 5, removing the separation carrier; and step 6, passing the digital printing plate on the mixed layer The machine prints a color layer to obtain a thermal transfer film containing hot melt powder.    The manufacturing method of claim 11, wherein the transferring step comprises: step A-1, depositing the sublimation paper on the surface of the mixed layer; and step A-2, placing the heat sublimation a weighted planar carrier, the weighted planar carrier being selected from the group consisting of a thin steel sheet or a glass; the heat-sublimated paper is adhered to the mixed layer by the true plane and weight of the weighted planar carrier; and step A-3 is about 50 Drying at -70 ° C to remove moisture; Step A-4, removing the separating carrier and the weighted planar carrier.