阅读说明：本技术 一种面料双面精准对位印花方法 (Fabric double-side accurate alignment printing method ) 是由 刘静 李琦 林贤同 于 2019-09-23 设计创作，主要内容包括：本发明公开了一种面料双面精准对位印花方法,在塑料膜印刷面涂布离型层和墨水吸收层,烘干后安装到数码印花机或者凹版印刷机上进行花型印刷,分别得到花型互为镜像的A花型膜与B花型膜,并收卷于花型膜放卷装置上；在待印花的面料表面先涂布一层含有水溶性热熔胶的浆料并烘干,然后收卷于印花面料放卷装置上；将待印花的面料、A花型膜、B花型膜同时穿过金属辊和加压辊之间,并使得待印花的面料位于A花型膜和B花型膜之间,在金属辊和加压辊的压力下,将A花型膜和B花型膜上互为镜像的花型分别转印到待印花的面料的两面,同时通过花型膜收卷装置对转印后的A花型膜和B花型膜进行收卷,通过印花面料收卷装置对转印后的面料进行收卷。(The invention discloses a fabric double-side accurate alignment printing method, wherein a plastic film printing surface is coated with a release layer and an ink absorption layer, the plastic film printing surface is dried and then is installed on a digital printing machine or a gravure printing machine for pattern printing, an A pattern film and a B pattern film with mutually mirror-imaged patterns are respectively obtained and are wound on a pattern film unwinding device; coating a layer of sizing agent containing water-soluble hot melt adhesive on the surface of the fabric to be printed, drying, and then rolling on a printed fabric unwinding device; the fabric to be printed, the A flower type film and the B flower type film penetrate through the metal roller and the pressure roller simultaneously, the fabric to be printed is located between the A flower type film and the B flower type film, under the pressure of the metal roller and the pressure roller, the flower types which are mirror images on the A flower type film and the B flower type film are respectively transferred to two sides of the fabric to be printed, the A flower type film and the B flower type film which are transferred are simultaneously wound through the flower type film winding device, and the transferred fabric is wound through the printed fabric winding device.)

1. A fabric double-side accurate alignment printing method is characterized by comprising the following steps:

(1) Coating a release layer and an ink absorption layer on the printing surface of the plastic film, drying, installing the plastic film on a digital printing machine or a gravure printing machine for pattern printing to obtain an A-pattern film and a B-pattern film with patterns being mirror images of each other, and rolling the A-pattern film and the B-pattern film on a pattern film unwinding device;

(2) Coating a layer of sizing agent containing water-soluble hot melt adhesive on the surface of the fabric to be printed, drying, and then rolling on a printed fabric unwinding device;

(3) Simultaneously enabling the fabric to be printed in the step (2) and the step (1), an A flower type film and a B flower type film to penetrate between a metal roller and a pressure roller, enabling the fabric to be printed to be located between the A flower type film and the B flower type film, firstly adjusting the longitudinal and transverse positions of the A flower type film and the B flower type film to enable the A flower type film and the B flower type film to be superposed in a mirror image manner, respectively transferring the flower types which are mutually mirror images on the A flower type film and the B flower type film to two sides of the fabric to be printed under the pressure of the metal roller and the pressure roller, simultaneously rolling the transferred A flower type film and B flower type film through a flower type film rolling device, and rolling the fabric after transfer printing through a printed fabric rolling device; or respectively adhering the A flower type film and the B flower type film to the front side and the back side of the fabric to be printed, rolling the A flower type film and the B flower type film together with the fabric, and tearing off the A flower type film and the B flower type film after cooling for a period of time.

2. the fabric double-sided accurate alignment printing method according to claim 1, wherein in the step (1), the plastic film is a PET film or a BOPP film.

3. The fabric double-sided accurate alignment printing method according to claim 2, wherein when the plastic film is a PET film, a release layer is coated on the printing surface of the plastic film, and then an ink absorption layer is coated; when the plastic film is a BOPP film, the release layer and the ink absorption layer can be coated sequentially or simultaneously; the release layer adopts an organic silicon release agent or a perchloroethylene release agent.

4. the fabric double-sided accurate para-position printing method according to claim 1, wherein in the step (2), the water-soluble hot melt adhesive is polyoxyethylene, hydroxypropyl cellulose, polyethylene glycol, water-soluble polyamide, water-soluble polyurethane or water-soluble polyester.

5. The fabric double-sided accurate alignment printing method according to claim 1, wherein in the step (3), the metal roller is internally provided with an electric heating pipe, a heat conduction oil pipeline or a steam pipeline.

6. The fabric double-sided accurate alignment printing method according to claim 1, wherein in the step (3), an inner core of the pressure roller is made of metal, and nylon, wool paper or cotton paper is wrapped outside the pressure roller; the two ends of the central shaft of the pressure roller are connected with a pressure device through bearings, the pressure device is a sliding block connected with an oil cylinder or an air cylinder, and the sliding block can slide up and down in the sliding groove track under the action of oil pressure or air pressure, so that the pressure roller is close to the metal roller to pressurize or is far away from the metal roller to remove pressure.

7. The double-sided accurate alignment printing method for the fabric according to claim 5, wherein the heating range of the metal roller is 80-250 ℃.

8. the double-sided accurate alignment printing method for the fabric according to claim 6, wherein the pressure between the pressure roller and the metal roller is 50-150 tons.

9. The fabric double-sided accurate alignment printing method according to claim 1, wherein in the step (3), the diameter of the metal roller and the pressing roller is 150 mm-600 mm.

Technical Field

The invention belongs to the field of textile printing and dyeing, and particularly relates to a double-sided accurate contraposition printing method for textile fabric.

background

The textile printing is that dye or pigment capable of dyeing textile fabric is applied to a local part of the surface of one side of the textile fabric through a physical or chemical method, the dye or pigment is deposited through a physical or chemical reaction, and has certain binding fastness with textile fabric fibers to form local dyeing on the textile, and the whole process is called textile printing.

Textile printing is therefore a partial, single-sided dyeing. Almost all textile printed products in the market have serious front and back phenomena, the front outline of the printed textiles is clear, and the colors are full; on the back side of the printed textile, the thin fabric is light in color and fuzzy in outline, the thick fabric is generally slightly dark, and the pattern outline on the front side cannot be seen at all at the light color.

However, some textile printing varieties in the market require that the front and the back of the printed fabric are completely consistent, the front and the back of the printed fabric are not separated, the definition of the outline is consistent, the color is dark and light, and the color light is consistent. For example, the fabric of scarf products, the garment fabric worn on the front side and the back side and the like have high requirements on the consistency of the front side and the back side of the printed fabric.

disclosure of Invention

The invention aims to solve the technical problem of providing a method for accurately aligning and printing two sides of a textile fabric aiming at the defects of the prior art, so that the textile printed fabric can realize high-quality, low-cost and high-speed double-side printing.

In order to achieve the purpose, the technical scheme adopted by the invention is as follows:

A fabric double-side accurate alignment printing method comprises the following steps:

(1) Coating a release layer and an ink absorption layer on the printing surface of a plastic film, drying, installing the plastic film on a digital printing machine or a gravure printing machine for pattern printing to obtain a strippable A-pattern film (hereinafter referred to as an A-pattern film) and a strippable B-pattern film (hereinafter referred to as a B-pattern film) with patterns being mirror images of each other, rolling, and installing the A-pattern film and the B-pattern film on a heat transfer machine transfer film unreeling device;

(2) Coating a layer of sizing agent containing water-soluble hot melt adhesive on the surface of the fabric to be printed, drying the sizing agent, and then installing the sizing agent on a fabric unreeling device of a heat transfer machine;

(3) simultaneously enabling the fabric to be printed in the step (2) and the step (1), an A flower-shaped film and a B flower-shaped film to pass through a metal roller and a pressure roller, enabling the fabric to be printed to be located between the A flower-shaped film and the B flower-shaped film, firstly adjusting the longitudinal and transverse positions of the A flower-shaped film and the B flower-shaped film to enable the A flower-shaped film and the B flower-shaped film to be superposed in a mirror image manner, respectively transferring the flowers which are mutually mirror images on the A flower-shaped film and the B flower-shaped film to two sides of the fabric to be printed under the pressure of the metal roller and the pressure roller, simultaneously rolling the transferred A flower-shaped film and B flower-shaped film through a flower-shaped film rolling device, washing the fabric after transfer by a printed fabric rolling device, then carrying out subsequent processes such as steaming, shaping and the like, and finally obtaining a double-sided printed fabric; or respectively adhering the A-pattern film and the B-pattern film to the front and back sides of the fabric, rolling the A-pattern film and the B-pattern film together with the fabric, respectively tearing off the A-pattern film and the B-pattern film before steaming, and performing steaming, washing and shaping processes to obtain the double-sided printed fabric.

specifically, in the step (1), the plastic film is a PET film or a BOPP film; when the transfer printing film is manufactured by digital printing, a PET film is required to be used as a transfer printing film base film because the drying temperature is high; when the transfer film is manufactured using the gravure press, both films can be used as base films of the transfer film.

Preferably, when the plastic film is a PET film, because the PET film is a polar film, and the surface of the PET film has polar groups, a release layer needs to be coated first, and then an ink absorption layer needs to be coated, however, there is a special case for the PET film, after a few release agents and ink absorbent solutions are mixed and coated on the PET film for one time and dried, the release effect and the ink absorption effect are good, for example, polyvinyl butyral resin as the release agent and hydroxypropyl cellulose as the ink absorbent are dissolved in the same organic solvent, and after mixing, the release effect and the ink absorption effect are good when coated on the PET film for one time; when the plastic film is a BOPP film, the BOPP film is a nonpolar film, and most of resin is coated on the surface of the BOPP film and can be normally separated, so that a separation layer and an ink absorption layer can be mixed and coated or coated in sequence, or coating resin which can be separated and can absorb ink on the BOPP film is directly selected and coated at one time.

There are three different types of release layers: one is that the release resin is combined with the plastic film, the release resin is nonpolar, and the release resin and the water absorption layer are easy to release, namely the release resin is attached to the surface of the plastic film during peeling, for example, an organic silicon release agent is the release agent; the second is that the adhesive force between the resin and the plastic film is low, and the adhesive force between the resin and the water absorption layer is strong, when the resin is transferred and peeled, the release layer is peeled from the plastic film, and the resin and the water absorption layer are transferred and printed on the fabric at the same time, for example, a perchloroethylene release agent belongs to the category; the third is mainly used for nonpolar BOPP films, because the BOPP films are nonpolar films, and a lot of resins are coated on the surfaces of the BOPP films and can be peeled off, a lot of resins can be used as a release layer and an ink absorption layer and coated on the surfaces of the BOPP films at the same time, or in order to increase the peeling effect, a small amount of release agent is mixed in the ink absorption layer.

The flower type, size and color collocation of the A flower type film and the B flower type film obtained in the step (1) are completely consistent, only the A flower type film and the B flower type film are mirror images of each other, namely the A flower type film and the B flower type film are pasted together in a face-to-face mode, and the flower types can be completely overlapped.

in the step (2), the water-soluble hot melt adhesive is of various types, all of which are soluble in water and can become fluid at high temperature, and the thermoplastic high molecular substances are water-soluble hot melt adhesives of various types, including but not limited to polyoxyethylene, hydroxypropyl cellulose, polyethylene glycol, water-soluble polyamide, water-soluble polyurethane, water-soluble polyester and the like.

In the step (3), if the transferred fabric can enter a subsequent steaming process in time, the plastic film can be immediately peeled off on a transfer machine after the pattern transfer, the transferred plastic film and the transferred fabric are respectively rolled, and then the fabric immediately enters the steaming process; if the transferred fabric cannot be steamed in time due to production arrangement, the plastic film can be not peeled, the plastic film and the fabric are rolled together and placed, and the plastic film and the fabric are peeled before steaming. Therefore, the moisture regain of the fabric in the stacking process can be prevented, and the white bottom of the fabric is stained.

Specifically, in the step (3), the metal roller adopts one of the following three structures to realize heating:

(1) The metal roller is internally provided with an electric heating pipe which is electrically heated;

(2) The metal roller is internally provided with a heat conduction oil pipeline, the heating pipeline is communicated with an external heat storage oil device, and hot oil is circularly introduced for heating;

(3) and a steam pipeline is arranged in the metal roller, is communicated with an external steam pipe, and is circularly introduced for heating.

the temperature of the metal roller can be adjusted from room temperature to 250 ℃ by the heating device.

In the step (3), the diameter of the metal roller and the diameter of the pressure roller are 150-600 mm, the pressure roller is a nylon roller with a metal inner core and nylon wrapping outside; or a wool roller or a cotton roller which is processed by wrapping wool paper or cotton paper; the thickness of the nylon or wool paper or cotton stained paper is 15 mm-40 mm.

The two ends of the central shaft of the pressure roller are connected with a pressure device through bearings, the pressure device is a sliding block connected with an oil cylinder or an air cylinder, and the sliding block can slide up and down in the sliding groove track under the action of oil pressure or air pressure, so that the pressure roller is close to the metal roller to pressurize or is far away from the metal roller to remove pressure. Two ends of the central shaft of the metal roller are connected to the frame of the thermal transfer printer through bearings, and one end of the central shaft of the metal roller is connected with a transmission device.

The heating temperature of the metal roller is different according to the types of the water-soluble hot melt adhesive, for example, when the water-soluble hot melt adhesive is polyethylene glycol 20000, the melting point of the polyethylene glycol 20000 is 75 ℃, so that the transfer temperature is 80 ℃ to achieve complete transfer, and when the water-soluble polyamide is selected, the melting point of the water-soluble polyamide is 180 ℃, so that the water-soluble polyamide can be completely transferred at the temperature of 200 ℃.

Wherein, the pressure between the nylon roller (or the cotton roller or the wool roller) and the metal roller is 50-150 tons, and when the fabric is light and thin fabric such as down jacket nylon yarn, only 50 tons can be completely transferred; the thick and heavy wool slubbed fabric needs 150 tons to be completely transferred.

Furthermore, the unreeling devices of the A-type film and the B-type film are provided with pattern aligning devices of the A-type film and the B-type film, and the device is a pattern-dividing transverse left-right aligning device and a longitudinal front-back aligning device, and the device is a common component of a transfer printing device in the field and does not serve as a creative contribution part of the application.

Has the advantages that:

the fabric double-side alignment printing method has the advantages of high precision, simple structure of the double-side thermal transfer printing device, high production speed, simultaneous completion of front and back printing at one time and good practical effect. When the gravure printing pattern is used, the cost is low, the pattern is fine, the yield is high, and the gravure printing method is suitable for mass production. When the digital jet printing pattern is used, the pattern is fine, the printing is carried out by one meter, and the method is suitable for small-batch and various patterns.

Drawings

the foregoing and/or other advantages of the invention will become further apparent from the following detailed description of the invention when taken in conjunction with the accompanying drawings.

FIG. 1 is a schematic structural diagram of a double-sided thermal transfer apparatus according to the present invention.

Wherein each reference numeral represents: 1A flower type film unwinding device; 2B flower type film unwinding device; 3, a printed fabric unwinding device; 4 a metal roller; 5 a pressure roller; 6A flower type film take-up device; 7B flower type film rolling device; 8 printed fabric winding device.

Detailed Description

The invention will be better understood from the following examples.

The structures, proportions, and dimensions shown in the drawings and described in the specification are for understanding and reading the present disclosure, and are not intended to limit the scope of the present disclosure, which is defined in the claims, and are not essential to the skilled in the art. In addition, the terms "upper", "lower", "front", "rear" and "middle" used in the present specification are for clarity of description, and are not intended to limit the scope of the present invention, and the relative relationship between the terms and the relative positions may be changed or adjusted without substantial technical changes.

As shown in figure 1, the double-sided thermal transfer printing device structure is adopted for alignment printing and comprises a pattern film unwinding device 1, a pattern film unwinding device 2, a printing fabric unwinding device 3, a metal roller 4, a pressing roller 5, a pattern film winding device 6, a pattern film winding device 7 and a printing fabric winding device 8. Wherein, the both ends of the central axis of the pressure roller 5 are connected with a pressure device through a bearing, the pressure device is a slide block connected with an oil cylinder, and under the action of oil pressure or air pressure, the slide block can slide up and down in the chute track, so that the pressure roller 5 is close to the metal roller 4 to pressurize or is far away from the metal roller 4 to remove pressure. Two ends of the central shaft of the metal roller 4 are connected to the frame of the thermal transfer printer through bearings, and one end of the central shaft is connected with a transmission device.