TWI706066B - Invisible fluorescent white dye transfer method for sublimation fabric - Google Patents

Abstract

The present invention relates to an invisible fluorescent white dye transfer method for sublimation fabrics, which includes: a thermal transfer heating device, a fabric, and a transfer paper with a length equivalent to the fabric. The method steps are as follows: A sublimation dye layer is printed on the surface, and the sublimation dye layer is mainly made of diphenylthio as a dispersible invisible fluorescent white dye; the cloth and the sublimation dye layer of the transfer paper are correspondingly laminated into a whole, It guides and controls the cloth and transfer paper to pass through a thermal transfer device at the same time, and the thermal transfer device is heated to a thermal transfer temperature to vaporize the dye in the sublimation dye layer of the transfer paper and transfer it to the fabric.

Description

Invisible fluorescent white dye transfer method for sublimation fabric

The present invention relates to an invisible fluorescent white dye transfer method for dye sublimation fabrics, and specifically refers to a dye sublimation transfer technology to transfer dyes with fluorescent white characteristics to the fabric.

Whether it is inkjet printing or traditional printing technology, four-color printing is used. The original is separated into cyan (C), magenta (M), yellow (Y), and black (K) four-color plates, and then Color synthesis is performed during printing. The so-called color separation is based on the principle of subtractive color, using the red (R) green (G) blue (B) three-color filter to selectively absorb the color light of different wavelengths. , And the original is decomposed into the three primary colors of yellow, magenta, and cyan, but based on the principle of subtractive color method and the aforementioned three primary colors cannot be mixed into white dye, this is the current limitation of inkjet and printing.

Please refer to Figure 1. The conventional thermal sublimation transfer equipment mostly includes: a transfer paper supply reel for winding the transfer paper 5 1, a cloth supply reel 2 for winding the cloth 4, and a heating roller 3 ; The dye sublimation transfer production steps: Step 1: Pre-print (print) the dye on the fabric 4 to be printed on a transfer paper 5 to form a pattern or graphic dye layer 6 on the surface, which will have dye The transfer paper 5 of layer 6 is fixedly wound on the transfer paper supply roll 1; Step 2: The fabric 4 and the transfer paper 5 are pulled out from the respective wound rolls, and the fabric 4 and the transfer paper 5 are drawn through multiple guide rollers. The two transfer papers 5 are attached smoothly and correspondingly; Step 3: Heated by the heating roller 3 to transfer the dye layer 6 on the transfer paper 5 corresponding to the surface of the fabric 4 to the fabric 4 to form a printing layer.

According to the above steps, the key to heat transfer of the dye layer 6 of the transfer paper 5 to the cloth 4 is that the dye constituting the dye layer 6 must have the characteristics of vaporization and sublimation: more specifically: the cloth 4 and the transfer paper 5 When passing through the heating roller 3 at the same time, the dye layer 6 originally printed on the transfer paper 5 is heated to a certain temperature by the heating roller 3, so that the dye layer 6 is sublimated from the original solid dye to a gaseous state, thereby infiltrating into the corresponding cloth 4 Inside the fiber pores, when the temperature drops (after leaving the heating drum 3), the gaseous dye system that penetrates into the fiber pores is reduced to a solid state, thus forming a printing layer on the cloth 4.

The printing layer printed and dyed by the above-mentioned sublimation transfer method has various advantages such as the dye completely penetrates into the fiber pores of the cloth 4, so that the dye of the printing layer is not easy to fall off and crack, and the color presented is very bright.

Of course, although the above-mentioned sublimation transfer technology has many advantages, its biggest limitation is that all the dyes used must have the characteristics of disperse dyes, and the characteristics of the disperse dyes must be slightly water-soluble and compatible. The dispersant can exhibit a highly dispersed state in water. The disperse dye can form a uniform suspension in ethanol (EA or) and isobutanol (IBA) solutions. With this feature, the sublimation transfer of ethanol and isopropanol The butanol vaporizes and volatilizes during the transfer process, and then the disperse dye is directly brought into the fiber pores of the cloth 4 to form a printing layer.

Fluorescence is a kind of photoluminescence (cold luminescence) phenomenon in which a certain normal temperature substance is irradiated by incident light (ultraviolet rays, X-rays, etc.) to make it into an excited state, absorb the light energy of the incident light, and emit outgoing light (wavelength Visible light that is longer than the incident light); and when the irradiation of the incident light is stopped, the excitation state is exited, so that the luminescence phenomenon disappears and the invisible state appears.

It is reported that the current common fluorescent white dyes cannot have the characteristics of disperse dyes. How to effectively use dispersible invisible fluorescent white dyes in sublimation transfer technology, and then disperse invisible fluorescent white dyes Printing and dyeing on the surface of the fabric is a subject studied by the inventor of this project.

The main purpose of the present invention is to provide a transfer method of invisible fluorescent white dye for sublimation fabrics, which uses thiophenediylbis, which has the characteristics of fluorescent white, as a dispersible invisible dye. Dyes with invisible and fluorescent properties are thermally transferred to the surface of the fabric.

To achieve the above objective, the present invention provides an invisible fluorescent white dye transfer method for sublimation fabrics, which includes: a thermal transfer heating device, a fabric, and a transfer paper with the length of the fabric. The method steps are as follows : A dye sublimation dye layer is printed on the surface of the transfer paper. The dye sublimation dye layer is mainly made of thiophenediylbis as a dispersible stealth fluorescent white dye, and made of methanol and isobutanol. (IBA), or aleurone made of polyvinyl butyral (PAB), etc. as a solvent; then the fabric and the sublimation dye layer of the transfer paper are superimposed into one body, and guide and control the fabric and transfer The printing paper passes through a thermal transfer device at the same time, and the thermal transfer device is heated to a thermal transfer temperature to vaporize the dye in the sublimation dye layer of the transfer paper and transfer it to the cloth.

According to the aforementioned main features, the sublimation dye and solvent components are expressed as a percentage by weight of approximately 10%-30% dispersible stealth fluorescent white dye; 70-90% solvent.

According to the aforementioned main features, the thermal transfer temperature is approximately between 190°C and 230°C, and the thermal transfer time is between 11 seconds and 30 seconds.

110, 120‧‧‧ steps

1‧‧‧Transfer paper supply roll

2‧‧‧Fabric supply reel

3‧‧‧Heating roller

4‧‧‧Fabric

5‧‧‧Transfer paper

6‧‧‧Dye layer

Figure 1 is a schematic diagram of the structure of a conventional thermal sublimation transfer heating device.

Figure 2 is a schematic flow chart of the thermal sublimation transfer printing method of the present invention.

In order to achieve the above-mentioned objectives and effects, the technical means and structure adopted by the present invention are illustrated in detail below to illustrate the features and functions of the preferred embodiments of the present invention for a complete understanding.

Please refer to Figure 2. Figure 2 is a schematic flow chart of the thermal sublimation transfer printing method of the present invention.

As shown in Figure 2, the present invention provides an invisible fluorescent white dye transfer method for sublimation fabrics. The method at least includes: a thermal transfer heating device, a fabric, and a transfer paper of the same length as the fabric, The steps of the method are as follows: Step 110: Print a sublimation dye layer on the surface of the transfer paper, the sublimation dye layer is mainly composed of thiophenediylbis as a dispersible invisible fluorescent white dye and a solvent Methanol and isobutanol (IBA), etc., or polyvinyl butyral (PAB) aleurone, etc. are combined. The thiophenediylbis described in the present invention is itself a kind of Invisible fluorescent white dye, its appearance is light yellow powder. After the dye absorbs visible light and ultraviolet light, it converts the ultraviolet light that is not visible to human vision into visible light of a certain color, and interacts with the general reflected light. The intensity of the reflected light of the dye is bound to be much higher than that of the general dyes, resulting in a very bright color. When the dye does not absorb ultraviolet rays, the visible light will disappear and become invisible, and only the general reflected light can be seen. In addition, the present invention The used diphenylthio can also form a uniform suspension in ethanol (EA or) and isobutanol (IBA), or polyvinyl butyral (PAB), etc., so it is very suitable As a special invisible fluorescent white dye for thermal transfer technology; Step 120: Laminate the fabric and the sublimation dye layer of the transfer paper into one correspondingly, and guide and control the fabric and the transfer paper through a thermal transfer device at the same time , The thermal transfer device is heated to a thermal transfer temperature to vaporize the dye in the sublimation dye layer of the transfer paper, so that the diphenyl sulfide penetrates into the pores of the fabric fibers through the vaporization process; generally speaking, the so-called thermal transfer The printing temperature is approximately between 190℃~230℃, and the heat transfer time is between 11 seconds and 30 seconds, depending on the material and thickness of the fabric. Generally speaking, if the heat transfer temperature is low or the fabric material cannot Increasing the heat transfer temperature can increase the color fastness of the dye by extending the heat transfer time.

In the present invention, thiophenediylbis is used as a dispersible stealth fluorescent white dye, and it is applied to the thermal transfer method, which effectively breaks the limitation of the conventional thermal transfer method using fluorescent white dye for printing.

However, the above descriptions are only preferred embodiments of the present invention, and are not limited to the scope of the present invention. Therefore, all simple modifications and equivalent structural changes made by using the description and drawings of the present invention should be the same. It is included in the scope of the patent of the present invention, and it is hereby stated.

110, 120‧‧‧ steps

Claims (3)

An invisible fluorescent white dye transfer method for sublimation fabrics includes: a thermal transfer heating device, a fabric, and a transfer paper with a length equivalent to the fabric. The method steps are as follows: print a surface of the transfer paper Dye-sublimation dye layer, the dye-sublimation dye layer is mainly made of thiophenediylbis as a dispersible stealth fluorescent white dye, and made of methanol, isobutanol (IBA), or polyvinyl alcohol The aleurone of butyral (PAB) is used as a solvent; the cloth and the sublimation dye layer of the transfer paper are superimposed into one body correspondingly, and the cloth and the transfer paper are guided and controlled to pass through a thermal transfer device at the same time, And heated to a thermal transfer temperature, whereby the dye of the sublimation dye layer of the transfer paper vaporizes and transfers to the fabric fiber. According to the invisible fluorescent white dye transfer method for sublimation fabrics described in item 1 of the scope of patent application, wherein the sublimation dye and solvent components are expressed as a percentage by weight of approximately 10% to 30% dispersible invisible fluorescent White dye; 70~90% solvent. According to the invisible fluorescent white dye transfer method for sublimation fabrics described in item 1 of the scope of patent application, the heat transfer temperature is approximately between 190°C and 230°C, and the heat transfer time is between 11 seconds and 30 seconds. Seconds.

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