TWI500836B - Transfer printing with integrated processes of dye transfer and steam color fixing - Google Patents

Description

Dye transfer and baking solid color integrated transfer printing

The invention relates to the textile printing and dyeing industry, in particular to a dye transfer and baking solid color integrated transfer printing.

The transfer printing is a dye printed on a fabric, which is first printed on a transfer carrier by a printing machine, and then the dye layer on the printed pattern paper is transferred onto the fabric. The traditional transfer printing method usually refers to a thermal transfer printing process developed in the 1960s, which uses an ink of disperse dyes to form inks on paper, and then transfers the dyes to a glass with a relatively clear glass temperature under hot pressing. And other synthetic fabrics. For natural fibers such as cotton, wool, silk and hemp, the traditional transfer printing tries to simulate the mechanism of polyester disperse dye transfer printing, and the cotton fabric is pretreated to improve the affinity for disperse dyes. For example, the utility model CN201020114900.6 "Sublimation transfer printing natural fiber products", but such methods produce large pollution, product feel is poor. In recent years, the cold transfer printing which has received much attention has transferred the pattern printed by the reactive dye to the natural fiber fabric at room temperature, and then cooled and fixed. Although cold-stacking has significant benefits in terms of energy savings, since cold-stacking typically takes 6-12 hours, the heat transfer printing process is long from production to finished product. For reactive dye printing, commonly used fixing methods are baking fixing and steam fixing. The baking and fixing products have poor hand feeling, and the high-grade fabrics such as silk can not be used for baking and fixing. The cellulose fibers are easy to turn yellow when baking; and the moisture control during steaming is improper, which is easy to cause the printing pattern to be bleed and blurred. Head and tail color Poor, so the solid color link has become one of the key issues that have long plagued the quality of printed products.

In the cold transfer printing production, the cold-stacking color fixing has the disadvantage that the printing production cycle is long, and the baking fixing and the steam-solid fixing need to increase the production process, increase the production cost and the like, and the invention provides a dye transfer and baking. The steam-solid color integrated transfer printing can overcome the shortcomings of the fabric fixing process in the existing cold transfer printing, and the quality and yield of the transferred fabric are improved.

The invention solves the defects of the fixing of the fabric in the existing transfer printing, and provides a dye transfer and baking solid color integrated transfer printing. The production of transfer printing is the three processes of pre-processing, transfer and fixation of the transfer fabric and the transfer pattern carrier, and the dye transfer and baking solid-color integrated transfer printing combines transfer and fixation into one process. In the transfer printing machine transfer device, a heating mechanism for baking and fixing the color is added, and the fixing operation of the transfer fabric is completed under the condition that the original transfer function is satisfied.

In dye transfer and baking solid color integrated transfer printing:

1. Suitable dyes are reactive dyes, direct dyes and acid dyes.

2. The transfer fabric should have a moisture content obtained by treating the fabric or the transfer pattern carrier through the pretreatment liquid, expressed by the weight of the obtained pretreatment liquid and the weight of the fabric; the moisture content is 5~65% by weight. Said

3. The transfer fabric baking solid color should be completed under the action of pressure, temperature and time; the pressure is determined by the transfer device, and the air supply pressure is 6 kg/cm ² ; the temperature is generated by the heating mechanism, which is 60 °C~145°C; the fixing time is 5 seconds to 30 seconds.

The transfer fabrics are cotton, wool and silk natural fiber fabrics, rayon recycled fiber fabrics, and nylon synthetic fabrics, including woven and knitted fabrics. The transfer pattern carrier is a transfer printing paper and a transfer printing plastic film. The fixing dye and the direct dye have a fixing temperature of 60 ° C to 145 ° C, a fixing time of 5 seconds to 30 seconds, an acid dye fixing temperature of 60 ° C to 120 ° C, and a fixing time of 15 to 40 minutes.

The moisture content of the transfer fabric is related to the pretreatment and the equipment used in the pretreatment process; the padding pretreatment and its device are suitable for fabric pretreatment, and the moisture content after pretreatment is 50-65% by weight. Roll coating pretreatment and its apparatus and rotary screen coating pretreatment and its device are suitable for the pretreatment of fabric and transfer pattern carrier, the moisture content after pretreatment is 10~30% by weight; spray coating method The pretreatment and its apparatus and the foam coating pretreatment and the device thereof are suitable for the pretreatment of the fabric and the transfer pattern carrier, and the moisture content after the pretreatment is 5 to 20% by weight.

The heating mechanism for adding the baking and fixing color in the transfer device is required to meet the pressure, temperature and time requirements required for the baking and fixing; the rolling type fixing device and the main roller heating mechanism are used for the baking and fixing, and the blanket is transferred. The baking device of the printing device and the main roller heating mechanism, the platen transfer device and the platen heating mechanism for baking and fixing.

The invention has the beneficial effects of using dye transfer and baking solid color integrated transfer printing to realize regeneration of dyes in natural fibers such as cotton, wool, silk, hemp and rayon. Rapid transfer printing on fiber fabrics and synthetic fibers such as nylon overcomes the defects of thermal sublimation transfer printing of natural fiber fabrics and the decomposing of some disperse dyes into aromatic amines, and greatly enhances the production of dye transfer printing. effectiveness. The invention utilizes the moisture content of the moisture fabric to reduce the energy and time of vaporization evaporation of the flowing water distributed in the fiber surface and the fiber gap during the hot press transfer process, and fully utilizes the capillary water and the bound water to sufficiently dissolve the dye on the carrier pattern. And after the fabric is heated, the fiber expands and the pores open, which facilitates the entry of the dye molecules into the fiber interior, and bonds with the fibers in a steaming environment, the fabric is cooled after the transfer, the fibers shrink, and the bonded dye is solidified inside the fiber, thereby A process that achieves rapid curing.

See Figure 1 and Figure 2, the dye transfer and baking solid color integrated transfer printing process is to process the fabric or transfer pattern carrier through the pretreatment liquid, and then the fabric and the transfer pattern carrier are both dense. After the transfer and the solidification of the transfer and fixing, the transfer fabric and the transfer pattern carrier are separated, and the separated transfer fabric is washed and dried to be a finished product. Therefore, dye transfer and baking solid color integrated transfer printing is a heating mechanism for baking and fixing in the transfer device of the transfer printing machine, which can combine transfer and fixation into one process, and meets the original requirements. The fixing task of the transfer fabric is completed under the transfer function condition. The dye transfer and calcination fixation integrated transfer printing is related to the dye used, the moisture content of the (pretreatment liquid), the pressure of the baking fixation, the temperature and the time.

In the following, the invention will be further illustrated by way of non-limiting examples. But should pay attention These examples are not to be considered as limiting the invention.

Example 1

Fabric: Cotton knit, 100% cotton, size: 16 x 16, weight: 185 g/m ² .

Reactive dye: K type (active yellow K-RN, reactive red K-7B, reactive turquoise K-GL, reactive black K-BR)

Pretreatment and its device: foam coating pretreatment and its device, wet pretreatment of transfer printing paper.

Containing (pretreatment liquid) moisture content: 15%.

Transfer and baking solidification integration: platen transfer device and platen heating mechanism. The platen transfer device and the platen heating mechanism are shown in Fig. 5, and the transfer device is composed of an upper platen 7 and a lower platen 8 and a pressurizing system lifting rod connected thereto, and the upper and lower plates are arranged. The cavity is equipped with a heating wire or an electric heating tube heating element. When both the transfer fabric 12 and the transfer printing paper 11 are closely passed through the roll transfer device, the transfer fabric is subjected to transfer and baking fixation under hot pressing. See Table 1:

Example 2

Fabric: Silk fabric, 12107 silk crepe de chine, 91 x 55, gram weight: 55 g/m ² .

Reactive dye: KN type (active orange KN-5R, reactive red KN-3B, reactive brilliant blue KN-R, reactive black KN-B).

Pretreatment method and device thereof: padding pretreatment and its device, and wetting pretreatment of fabric.

Contains (pretreatment liquid) moisture: 65%

Transfer and baking solidification integration: blanket belt transfer device and main roller heating mechanism. The blanket fixing device and the main roller heating mechanism are shown in Fig. 4, and the transfer device is composed of a blanket belt around the main roller 6 and the pressure rollers 9 and 10, and the main roller 6 is internally hollow. It is equipped with electric heating tube heating element and heating oil. When both the transfer fabric 4 and the transfer printing plastic film 5 are closely passed through the roll transfer device, the transfer fabric is subjected to transfer and baking fixation under hot pressing. See Table 2:

Example 3

Fabric: human cotton knit, 95% rayon/5% spandex, weight: 150 g/m ² .

Reactive dye: ME type (active yellow ME-4GL, reactive red ME-2G, reactive brilliant blue ME-BR, reactive black Megafix BES).

Pretreatment method and device thereof: foam coating pretreatment and device thereof Flower paper wet pretreatment.

Containing (pretreatment liquid) moisture content: 10%.

Transfer and baking solidification integration: platen transfer device and platen heating mechanism, see Examples 1 and 5. See Table 3:

Example 4

Fabric: velveteen fabric, 100% cotton, size: 96 × 102, 42 ^s / 2+ (60 ^s / 2 + T / 45 ^s /2) × 32 ^s , weight: 230 g / m ²

Reactive dye: M type (reactive yellow M-3RE, active red M-2BE, active dark blue M-BE, reactive black M-2R).

Pretreatment method and device thereof: padding pretreatment and its device, and wetting pretreatment of fabric.

Containing (pretreatment liquid) moisture: 60%

Transfer and baking solidification integration: blanket belt transfer device and main roller heating mechanism, see Example 2 and Figure 4. See Table 4:

Example 5

Fabric: mercerized cotton, 94% cotton 6% spandex, weight: 150 g/m ² .

Reactive dye: X type (active yellow X-R, reactive brilliant red X-3B, reactive blue X-R, reactive black KN-B (KN type)).

Pretreatment method and device thereof: spray coating pretreatment and its device, and wetting pretreatment of fabric.

Contains (pretreatment liquid) moisture: 35%

Transfer and baking solidification integration: roll transfer device and main roll heating mechanism. The roll transfer device and the main roll heating mechanism are shown in Fig. 3. The transfer device is composed of a single press roll and a main roll 3, or a double press roll and a main roll 3. The main roll inner cavity is provided with a heating wire. Or electric heating tube heating parts. When both the transfer fabric 1 and the transfer printing paper 2 are closely passed through the roll transfer device, the transfer fabric is subjected to transfer and baking fixation under hot pressing. In order to fix the time required to achieve the fixing process, an auxiliary roll 9 is added to the main roll to provide a longer contact time between the transfer fabric and the heated main roll. See Table 5:

Example 6

Fabric: Taslan; raw material: 100% nylon, size: 70D × 160D.

Acid dye: weak acid dye (weak acid yellow 6G, weak acid red E-BL, weak acid brilliant blue FFR, weakly acidic black BR).

Pretreatment method and device thereof: pretreatment of roller coating method and device thereof, and pretreatment of fabric wetting.

Contains (pretreatment liquid) moisture: 15%

Transfer and baking solidification integration: platen transfer device and platen heating mechanism, see Examples 1 and 5. See Table 6:

Example 7

Fabric: Nylon spinning, material: 100% nylon, size: 70D × 70D.

Acid dye: Strong acid dye (acid yellow RN, acid red 5B, acid blue FG, acid black 10B).

Pretreatment method and device thereof: padding pretreatment and its device, and wetting pretreatment of fabric.

Containing (pretreatment liquid) moisture content: 65%.

Transfer and baking solidification integration: platen transfer device and platen heating mechanism, see Examples 1 and 5. See Table 7:

Example 8

Fabric: Nylon spinning, material: 100% nylon, size: 40D × 40D.

Acid dye: neutral dye (neutral dark yellow GRL, neutral red 2GL, neutral blue BNL, neutral black M-SRL)

Pretreatment method and device thereof: padding pretreatment and its device, and wetting pretreatment of fabric.

Containing (pretreatment liquid) moisture content: 65%.

Transfer and baking solidification integration: platen transfer device and platen heating mechanism, see Examples 1 and 5. See Table 8:

Example 9

Fabric: Cotton yarn card 100% cotton, size: 40 × 40 / 140 × 73 grams Weight: 129 g / m ² .

Direct dyes: general direct dyes (direct yellow R, direct red B, direct dark green NB, direct black OB).

Pretreatment method and device thereof: padding pretreatment and its device, and wetting pretreatment of fabric.

Containing (pretreatment liquid) moisture content: 58%.

Transfer and baking solidification integration: blanket belt transfer device and main roller heating mechanism, see Example 2 and Figure 4. See Table 9:

Example 10

Fabric: Bamboo fiber fabric, 100% regenerated cellulose fiber, specifications: warp yarn is bamboo fiber 14.5 tex × 2, weft yarn is 17.8 tex bamboo fiber yarn, density is 260 pieces / 10cm, weft density is 205 pieces / 10 cm weight :280 g/m ² .

Direct dye: direct fast dye (direct fast yellow GC, direct fast red) F3B, direct fast blue FFRL, direct fast black GF)

Pretreatment method and device thereof: pretreatment of the rotary screen coating method and its device, and the wetting pretreatment of the fabric.

Containing (pretreatment liquid) moisture content: 30%.

Transfer and baking solidification integration: blanket belt transfer device and main roller heating mechanism, see Example 2 and Figure 4. See Table 10:

1‧‧·Transfer fabric

2‧‧‧Transfer printing paper

3‧‧‧Main roller

4‧‧‧Transfer fabric

5‧‧‧Transfer printed plastic film

6‧‧‧Main roller

7‧‧‧Upper plate

8‧‧‧ Lower platen

9‧‧‧Pressure roller

10‧‧‧Pressure roller

11‧‧‧Transfer printing paper

12‧‧‧Transfer fabric

The first figure is one of the schematic diagrams of the process flow of dye transfer and baking solid color integrated transfer printing.

Figure 2 is the second schematic diagram of the process flow of dye transfer and baking solid color integrated transfer printing.

Fig. 3 is a schematic view showing the baking and fixing of the roll transfer device and the main roll heating mechanism.

Figure 4 is a schematic diagram of the baking and fixing of the blanket belt transfer device and the main roller heating mechanism.

Fig. 5 is a schematic view showing the baking and fixing of the plate-type transfer device and the platen heating mechanism.

Claims (8)

A dye transfer and baking solid color integrated transfer printing method, the transfer fabric and the transfer pattern carrier are subjected to three processes of pretreatment, transfer and fixation, wherein: the dye transfer and baking solid color integrated transfer printing Is to combine the transfer and fixation into a process, adding a heating mechanism for baking and fixing the color in the transfer device of the transfer printing machine, and completing the fixing task of the transfer fabric under the condition of the original transfer function; dye transfer And the method of integrated printing by baking and fixing color: the dye is selected from K type reactive dye, KN type reactive dye, M type reactive dye, ME type reactive dye, X type reactive dye, general direct dye, strong acid dye, Or a weak acid dye; the transfer fabric should have a moisture content obtained by treating the fabric or transfer pattern carrier with a pretreatment liquid, expressed by the weight of the obtained pretreatment liquid and the weight of the fabric; The moisture content is 5-65% by weight; the transfer fabric baking solidification should be completed under the action of pressure, temperature and time; the pressure is determined by the transfer device, and the supply pressure is 6 kg/cm ² ; The temperature is generated by the heating mechanism The fixing temperature is 60 ° C ~ 145 ° C; the fixing temperature of the reactive dye and the direct dye is in the range of 60 ° C to 145 ° C, the fixing time is in the range of 5 seconds to 30 seconds; the fixing temperature of the acid dye It is in the range of 60 ° C to 120 ° C and the fixing time is in the range of 15 to 40 minutes. The dye transfer and baking solid color integrated transfer printing method according to claim 1, wherein the transfer fabric is cotton, wool and silk natural fiber fabric, and artificial cotton. Recycled fabrics, as well as nylon synthetic fabrics; including woven and knitted fabrics. The dye transfer and baking solid color integrated transfer printing method according to claim 1, wherein the transfer pattern carrier is a transfer printing paper and a transfer printing plastic film. The dye transfer and baking solid color integrated transfer printing method according to claim 1, wherein: the moisture content of the transfer fabric is related to the pretreatment and the apparatus used in the pretreatment process; the padding type pretreatment and the device thereof It is suitable for fabric pretreatment, and the moisture content after pretreatment is 50~65% by weight; the pretreatment of roll coating method and its equipment and the pretreatment of the rotary screen method and its device are suitable for the fabric and transfer pattern carrier. Treatment, pretreatment, moisture content is 10~30% by weight; spray coating pretreatment and its device and foam coating pretreatment and its device are suitable for pretreatment of fabric and transfer pattern carrier, pretreated The moisture content is 5 to 20% by weight. The dye transfer and baking solid color integrated transfer printing method according to claim 1, wherein the heating mechanism for adding the baking and fixing color in the transfer device is required to meet the pressure, temperature and time requirements for baking and fixing the color. The use of a roll type transfer device and a main roll heating mechanism for baking solid color, a blanket transfer device and a main roll heating mechanism for baking and fixing, a plate-type transfer device, and a platen heating mechanism for baking and fixing. The dye transfer and baking solid color integrated transfer printing method according to claim 5, wherein: the roll transfer device and the main roll heating mechanism are baked by a single press roll and The main roller, or the two pressure roller and the main roller, the main roller inner cavity is provided with a heating wire or an electric heating pipe heating element; when both the transfer fabric and the transfer pattern carrier are closely passed through the roll transfer device, the heat is Under the action of pressure, the transfer fabric is transferred and baked and fixed; in order to fix the time of fixing process, an auxiliary roll is added on the main roll to make the transfer fabric and the heated main roll have a longer length. Contact time. The dye transfer and baking solid color integrated transfer printing method according to claim 5, wherein: the blanket transfer device and the main roller heating mechanism are baked and fixed, and the transfer device is surrounded by a blanket to the main roller. And the pressure roller is configured, the main roller inner cavity is provided with the electric heating pipe heating element and the heating oil; when the transfer fabric and the transfer pattern carrier are closely passed through the roll type transfer device, under the action of hot pressing, turning The printed fabric is transferred and baked to fix color. The dye transfer and baking solid color integrated transfer printing method according to claim 5, wherein: the platen transfer device and the platen heating mechanism are used for baking and fixing, and the transfer device comprises an upper plate and a lower plate and The pressure system lifting rod is connected, and the inner wall of the upper and lower pressure plates is provided with a heating wire or an electric heating tube heating element; when the transfer fabric and the transfer pattern carrier are closely passed through the roll transfer device, the hot pressing action Next, the transfer fabric is transferred and baked to fix color.