JPS6325114B2 - - Google Patents

Description

[Detailed description of the invention]

[Industrial Application Field] The present invention relates to a method of bonding cloth and materials used for bonding.More specifically, the present invention relates to a method of bonding cloth and materials used for bonding.
The present invention relates to a method of bonding cloth by curing the adhesive by irradiating it with ionizing radiation. That is, the present invention belongs to the field of sewn products, and more specifically, the present invention relates to the field of bonding cloth using an adhesive in the sewing process of clothing and the like. [Prior Art] Traditionally, in the field of sewn products, sewing machines have been used to prevent the folded or overlapping parts from shifting when folding or overlapping clothing, etc. and sewing it. It was used to perform basting stitches. When using an adhesive to (temporarily) adhere the above folded or overlapping parts, a method such as inserting a tape-shaped adhesive into the folded or overlapping parts and heat-pressing the parts is recommended. It is taken. In addition, in the field of adhesive interlining, which is characterized by the use of adhesives to bond fabrics together, it is common to spray powdered thermoplastic resin onto the fabric in a fixed dot pattern or randomly, and then glue the fabric together. The methods used include folding or overlapping and fusing by thermocompression bonding. [Problems to be Solved by the Invention] Conventional cloth sewing or gluing techniques have the following problems. In other words, in the method of sewing using a basting sewing machine, the fabric must be moved over a wide range on a two-dimensional plane, and for aesthetic reasons, the basting thread must be removed after lock stitching. There is a need. In other words, since the sewing process requires human power, it is difficult to speed up and automate the sewing process. This situation is also the same when using a method in which a tape-like adhesive is sandwiched between folded or overlapping portions of cloth. In addition, in the method of applying thermoplastic resin powder onto cloth and then folding or overlapping the cloth and bonding them with heat, no method has yet been developed to place the adhesive on the cloth in an arbitrary pattern. In this situation, it is desired to develop a technology that can freely fuse adhesives of a required concentration to required parts of fabrics of various shapes and sizes. Furthermore, there are many problems to be solved regarding the adhesives used to bond fabrics. That is,
Currently commercially available textile adhesives do not necessarily have satisfactory performance in terms of suitability as textile adhesives, heat resistance, water resistance, and solvent resistance, and furthermore, they do not necessarily have satisfactory performance in terms of suitability as textile adhesives, heat resistance, water resistance, and solvent resistance. However, the adhesive processing speed, which is an important factor, is not always satisfactory. As described above, in sewing processes using adhesives, many problems remain to be solved regarding the adhesive application process and the adhesive used. The present invention provides a new technique for bonding cloth using an adhesive in order to speed up the sewing process and save labor. Moreover, the present invention
This technology provides a technology to freely fuse adhesive at the required concentration to the required parts of fabrics of various shapes and sizes, thereby meeting the demand for small-lot, high-mix adhesive processed products. is also an attempt to respond. [Means for solving the problems] Regarding the above-mentioned problems, especially when it comes to bonding fabrics, there is still no technology to freely apply adhesive at the required concentration to the required areas of fabrics of various shapes and sizes. In order to solve the problem that the sewing process has not yet been developed, and that speeding up and labor saving in the sewing process is lagging behind, the inventors of the present invention have conducted extensive research and have discovered the principles and adhesives in the technical field of copy printing devices. By using an ionizing radiation-curable adhesive with extremely high processing speed and using principles from the technical field of copying and printing equipment,
The charged adhesive can be applied to the fabric in any shape, and by using an ionizing radiation-curable resin as the adhesive, it is an important factor for speeding up the sewing process. The inventors have discovered that certain adhesive processing speeds can be significantly improved and have completed the present invention. That is, the present invention uniformly charges a conductive photoreceptor layer provided on a conductive substrate by corona discharge, and exposes the charged surface of the photoreceptor layer to light in an arbitrary pattern. The charge on the exposed area is reduced to form an electrostatic latent image of the pattern, which is an unexposed area with a large amount of surface charge remaining, on the surface of the photoreceptor layer, and the electrostatic latent image is charged to a polarity opposite to that of the electrostatic latent image. Alternatively, an electrostatic latent image of the pattern, which is an exposed area with reduced surface charge, is formed and charged to the same polarity as the electrostatic latent image. By using a powdered ionizing radiation-curable adhesive to visualize the electrostatic latent image, the image formed by the powdered adhesive on the surface of the photoreceptor can be directly applied to cloth or knit products. An adhesive fabric with the adhesive adhered in the pattern is prepared by electrostatic transfer to the surface of the fabric or to another medium surface and then retransferred to the fabric or knitted product. Alternatively, the fabric may be bonded by folding and overlapping a part of the adhesive fabric, or by overlapping another fabric or knit product and heating it to fuse the adhesive, with or without heat fusing it to the knit product. The present invention provides a cloth bonding method characterized in that the adhesive is then cured by irradiation with ionizing radiation, thereby streamlining, labor saving, and speeding up the adhesive sewing process. In the present invention, a method is adopted in which adhesive is applied onto cloth in an arbitrary pattern using principles from the technical field of copying and printing devices. In a laser printer, an electrical signal generated by a pattern generator is converted into an optical signal, and a laser beam is irradiated onto the photoreceptor to form an electrostatic latent image on the surface of the photoreceptor. Powder is electrically deposited to visualize the electrostatic latent image, and printing or printing is performed. Therefore, in the present invention,
Using the electrophotographic method, the electrostatic latent image formed on the photoreceptor by the image formation of the reflected light of the original pattern image to be adhered or the optical signal from the pattern generator is used to print on the cloth. The adhesive is applied, the fabric is bonded by heating, and the adhesive is cured by irradiation with ionizing radiation during or after the bonding process. The original pattern can be one that has been enlarged or reduced by a copying machine, an image that has been composited from various original patterns by digitizing the image, or various pattern information that has been read by an image recognition device. . Using these original patterns, an electrostatic latent image electrically formed on a photoreceptor can be used to apply adhesive to cloth. There are two methods for visualizing an electrostatic latent image formed on a photoreceptor. In other words, there is a method using a powder having a polarity opposite to the polarity of the surface charge of the electrostatic latent image formed on the photoreceptor (so-called regular development method), and a method using powder having the same polarity as the polarity of the latent image on the photoreceptor. (so-called reversal development method). In general, in printers, parts of characters and graphics that correspond to black backgrounds are illuminated, electrical signals are converted into optical signals, and a light beam is irradiated onto the photoreceptor, while parts of the background that correspond to white backgrounds are illuminated. A method is used in which dark areas are created without any exposure. In this method, since the surface potential of the background area is higher than that of the character/graphic area, it is necessary to use powder having the same polarity as the surface of the photoreceptor in order to visualize the latent image. On the other hand, in a copying machine system that uses reflected light from the original image, the black background portion of the character shape has a higher surface potential than the background portion, so it has a charging polarity opposite to the surface potential polarity on the photoreceptor. Visualized by powder. When applying an electric charge to powder, adhesive powder is mixed with magnetic powder such as iron powder and other inorganic powder, and the charged polarity and amount are adjusted by the friction. Charge polarity and charge amount are also controlled by the skeletal structure, functional groups, etc. of the resin constituting the powder. Furthermore, if necessary, the charge polarity and charge amount of the resin can be controlled by adding various dyes and the like. A colorless to light-colored to white charge control agent is preferred. The amount of charge can also be controlled by preparing a surface treatment agent for the magnetic powder. Commonly used photoreceptors include amorphous selenium and its alloys (eg, selenium/tellurium), cadmium sulfide, organic dye composites, amorphous silicon, and the like. These photoreceptors have different surface charge polarities depending on how easily electrons or holes generated on the surface can reach the conductive layer on the back of the photoreceptor, so these photoreceptors can be used depending on the purpose. Can be used selectively. For example, when using an amorphous selenium-based photoreceptor, the surface of the photoreceptor is uniformly charged to a positive polarity, and a pattern of light corresponding to the bright areas of the original image is irradiated to increase the positive electrostatic charge. A method of forming a latent image is adopted. In this case, regular development is performed using negatively charged powder. In the present invention, as the resin constituting the powder adhesive, it is possible to select a resin that is negatively or positively charged, or to add an appropriate amount of dyes that have a charge adjustment function to the resin. Therefore, it is possible to control the charge polarity of the powder adhesive. Therefore, it is possible to use any combination of the photoreceptor and development method described above. The adhesive powder required to visualize the electrostatic latent image has a different particle size depending on the thickness of the fibers that make up the cloth, the smoothness of the woven or non-woven fabric, the roughness of the texture, etc. However, those having an average particle size of 5 to 1000 μm, preferably 10 to 300 μm are used. The amount of powder attached to the photoreceptor is
It is adjusted by the surface potential of the photoreceptor, the amount of exposure (depending on the exposure wavelength, exposure intensity, exposure time, etc.), the bias voltage during development, the amount of charge of the powder, the particle size, etc. The method of transferring the powder visualized and adhered on the photoconductor to cloth is to bring the cloth close to the photoconductor and apply a method such as applying corona discharge from the opposite side of the cloth to transfer the powder to the cloth. A method in which the powder is charged to the opposite polarity and transferred to cloth using the electrostatic attraction. A medium with an insulating surface (insulating medium) is brought close to the photoreceptor, and corona is applied from the opposite side of the medium surface. The medium is charged to a polarity opposite to that of the powder by a method such as applying an electric discharge, and the powder is electrostatically transferred to the medium by the electrostatic attraction, and the cloth is brought close to this medium, and the same process is performed. A method in which powder is electrostatically transferred to cloth using a method such as applying corona discharge from the opposite side of the cloth. By electrostatically transferring the powder onto a medium by applying a corona discharge from the opposite side of the medium, and then bringing a cloth into contact with the medium and applying heat or pressure from above the medium,
There are methods of transferring and fusing powder to cloth, and the transfer method can be selected depending on the material and shape of the cloth. In this way, a cloth with powdered adhesive adhered to it in an arbitrary pattern can be obtained, but if you need to handle the cloth in an unfused state without layering it with another cloth or the like and thermally bonding it, There is a risk that the adhesive may fall off during handling operations such as post-processing of the cloth. Therefore, for example, the powder-covered cloth may be fused to the cloth using radiant heat from an infrared lamp, xenon flash lamp, heat oven, etc., or it may be passed between heated rollers that have been subjected to mold release treatment. It is necessary to fix the powder to the fabric by a method such as fusing using a heat press that has been subjected to mold release treatment. The powdered adhesive is preferably one that can be easily heat-fused, but since the powder is charged by friction with magnetic powder etc. at the stage of visualizing the electrostatic latent image,
It must not cause caking or the like to occur in the powder at ordinary temperatures, thereby reducing the fluidity of the powder. In the visualization method using magnetic powder, a rotating roll having multiple magnetic poles inside is usually used to form a sleeve made of magnetic powder and adhesive powder, and this rotating sleeve transfers the adhesive powder to the photoreceptor. Attach to. Therefore, the adhesive powder must maintain an elastic modulus above a certain level at ordinary temperatures. In addition, a cascade type development method using beads such as glass or iron balls can also be used as a method for visualizing a latent image by frictional charging due to gravity falling of inorganic powder. In this case, the abrasion resistance of the powder is similarly required. The feature of this cascade method is that beads with large particle sizes can be used.
Effective for triboelectrification and visualization of powdered adhesives with large particle sizes. In this way, powdered adhesive is mixed with inorganic powder such as magnetic powder or beads and stirred, so
Materials that allow powder to easily fuse should be avoided. The fabric prepared by the above method, to which the powdered adhesive has been adhered or fused, is folded and stacked, or another fabric is stacked on top of it, and the fabric is bonded by heat pressing or passing it through a heated roller. reach. When heat-sealing adhesive resin to cloth, the heat-sealing must be done at a temperature, pressure, and time that does not damage the properties of the cloth (or fibers). A resin whose softening point is too low may be easily fused, but the fluidity of the powder at ordinary temperatures is poor. A material with a softening point that is too high is undesirable because it requires heating and fusing at a higher temperature. When directly heat-sealing cloth with adhesive powder adhered to it using a heat roller, the adhesive must not migrate to the heat roller, but in order to avoid this, the melt viscosity, especially the dynamic viscosity, must be It is necessary to select the appropriate one. In addition, when bonding cloth, it is preferable to heat-seal the cloth at a temperature as low as possible, and it is necessary to prevent the adhesive from seeping out to the back side of the cloth due to excessive increase in melt fluidity. Methods for curing adhesives include a method of curing the resin by irradiating the adhesive with ultraviolet rays, and a method of curing the resin by irradiating the adhesive with ionizing radiation. However, if an ultraviolet curing method is used, it is not possible to effectively produce the adhesive fabric that is the object of the present invention. This is because when a thick resin layer is irradiated with ultraviolet rays,
Only the surface layer of the resin is cured by ultraviolet rays,
This is because the curing reaction does not reach the inside of the resin. On the other hand, ionizing radiation can pass through the entire resin layer and can make the resin three-dimensional and harden it in a short time. It is known that ionizing radiation curing methods can be applied to curing automobile parts, curing pressure sensitive adhesives, curing magnetic tape binders, manufacturing nonwoven fabrics, and the like. The powdered adhesive used in the present invention is
An ionizing radiation-curable polymer composition having a particle size of 1000 μm, preferably 10 to 300 μm. The ionizing radiation-curable polymer composition used in the present invention includes, for example, polyethylene, polypropylene, polystyrene, poly(meth)acrylate, polyester(meth)acrylate, polyurethane(meth)acrylate, polyether(meth)acrylate, The main component is a polymer that undergoes a crosslinking reaction when exposed to ionizing radiation, such as epoxy (meth)acrylate, polyacrylamide, polyvinyl chloride, polyamide, (unsaturated) polyester, (unsaturated) polyether, polysiloxane, and polyacrolein. It is something. These polymers can be used alone or in the form of a mixture or copolymer of two or more. As adhesives for fibers, it is preferable to use polymers in which the terminal or side chain of the main chain is acrylic-modified, in view of the fact that it has a fast curing speed and requires a small amount of radiation for curing. is not limited to. Examples of acrylic modified polymers include polyester (meth)acrylate, polyurethane (meth)acrylate, polyether (meth)acrylate, polyepoxy (meth)acrylate, etc.
Among them, polyester (meth)acrylate and polyurethane (meth)acrylate are most preferably used in consideration of adhesiveness, flexibility, and solvent resistance. The method for synthesizing polyester (meth)acrylate and polyurethane (meth)acrylate is not particularly limited, and known methods can be used. For example, polyester (meth)acrylate is synthesized as follows. A dicarboxylic acid and a dihydric or polyhydric alcohol are reacted by condensation polymerization so that the alcohol is in excess of the acid to obtain a prepolymer polyester having hydroxyl groups at the terminals. React this with (meth)acrylic acid,
A polyester (meth)acrylate containing a (meth)acryloyl group is obtained. Although various resins can be used as a prepolymer for polyurethane (meth)acrylate, it is most preferable to use polyester or polyether as a prepolymer. When using polyester as a prepolymer, the same prepolymer polyester used in synthesizing the above-mentioned polyester (meth)acrylate can be used. For example, this prepolymer polyester and 2
-Polyurethane (meth)acrylate can be obtained by reacting hydroxyethyl (meth)acrylate with tolylene diisocyanate. When polyether is used as the prepolymer, polyurethane (meth)acrylate can be obtained, for example, by reacting poly(alkylene oxide) glycol, polyfunctional isocyanate, and 2-hydroxy (meth)acrylate. When polyester is used as a prepolymer, it may contain an ethylenic double bond in its main chain for the purpose of increasing crosslinkability, and it may also contain an unsaturated dicarboxylic acid such as maleic acid or fumaric acid as a carboxylic acid component. be. However, if the amount of unsaturated dicarboxylic acid introduced is too large, the resin loses its flexibility after curing, resulting in a hard and brittle resin, which is not preferred as an adhesive for fibers. Therefore, the amount of unsaturated dicarboxylic acid introduced is the total amount of carboxylic acid introduced.
70% or less is preferable. The ionizing radiation-curable polymer composition obtained using the above components has a number average molecular weight of 1,000 to 100,000 and a softening point of 60 to 170°C. In addition, the melt viscosity at a temperature 20℃ higher than the softening point is 3000 to 300000 cps.
It is. A composition having such physical properties is suitable as an adhesive for fibers. Additives such as a reactive diluent, a polymerization inhibitor, a charge control agent, a coloring agent, an antioxidant, and a fluidizing agent are added to the powdered ionizing radiation-curable adhesive used in the present invention as necessary. be able to. Examples of reactive diluents include diol diacrylate,
Reactive oligomers or unsaturated monomers such as triol triacrylate and epoxy acrylate can be used. Examples of the polymerization inhibitor include hydroquinone, hydroquinone monoethyl ether, t-butylhydroquinone,
Examples include 2,5-di-t-butylhydroquinone and 2-methylhydroquinone, and it is preferable to use them in an amount of 0.001 to 1.0% by weight. Examples of the charge control agent include nigrosine-based electron-donating dyes for positive charging, metal salts of naphthenic acid or higher fatty acids, and alkoxylated amines. For negative charging, organic complexes are effective, and other examples include chlorinated paraffin and chlorinated polyester. Examples of the coloring agent include copper phthalocyanine, benzidine derivatives, carmine 6B, and the like. As an antioxidant, 2,6-di-t-butyl-p
- Examples include phenolic antioxidants such as cresol, sulfur-based antioxidants such as dilaurylthiodipropionate, and other amine-based antioxidants.
Examples of fluidizing agents include colloidal silica, hydrophobic silica, and silicone varnish. However, these additives must be added to an extent that does not impair the adhesive properties of the adhesive. In the present invention, when an adhesive having an average particle size of 50 μm or more is charged and attached to the surface of the photoreceptor layer, it is preferable to use a carrier with an average particle size of 200 μm or more. When used, silica sand, glass beads, aluminum balls, steel balls, etc. with an average particle size of 200 to 2000 μm are used as carriers. When using the magnetic brush development method, iron, nickel, or
Magnetic powders such as cobalt and iron oxide are used as carriers. It is also possible to use a carrier whose surface is coated with a polymer film for the purpose of adjusting triboelectric charging properties and preventing damage to the surface of the photoreceptor. The object to be transferred used in the present invention is a fiber, an insulating medium, or a release medium. The fibers used in the present invention are cloth or knit products, and are woven or knitted fabrics made of one or a combination of synthetic fibers and natural fibers such as cotton, rayon, wool, polyester, linen, acrylic, nylon, and silk. It is. Furthermore, various other nonwoven fabrics, reticulated fabrics, etc. can also be used. In particular, the surface resistivity of the fiber material is
It is preferable to use a material having a resistance of 5×10 ⁵ Ωcm or more at a temperature of 75% relative humidity; if it is smaller than this, transfer becomes difficult. An organic polymer or an inorganic material can be used as the insulating medium, and it is preferable to use one with a volume resistivity of 5×10 ⁶ Ωcm or more at a temperature of 30°C and a relative humidity of 75%. If it is small, transfer becomes difficult. As the mold release medium, materials coated with silicone, Teflon, etc. can be used, and the critical surface tension of
It is preferable to use 32 dyne/cm or less.
If a value larger than this value is used, it will be difficult to retransfer onto cloth. These insulating media and release media may be in the form of a film, sheet, belt, roll, or the like. In the present invention, ionizing radiation is irradiated to cure the adhesive, and examples of ionizing radiation include α rays, β rays, γ rays, X rays, and electron beams. Among these ionizing radiations, it is most preferable to use an electron beam, considering the speed of adhesion processing, low cost, etc. As a high voltage generation system for the electron beam accelerator used in the present invention, any of the Van de Graaf type, Kotscroft-Walton modified type, and insulated iron core type can be used. Both spot beam scanning type and electron curtain type accelerators can be used. As the electron beam irradiated from such an accelerator, it is preferable to use one having an energy of 100 to 500 KeV with an irradiation dose in the range of 0.1 to 50 Mrad, and a more preferable irradiation dose is 0.5 to 20 Mrad. The irradiation time is preferably 0.1 to 30 seconds. In the present invention, in order to bring the cloth close to the photoreceptor and directly transfer the adhesive powder image on the photoreceptor to the cloth,
For example, the following method can be used. (1) As shown in Figure 1, the thickness is selected from inorganic photoreceptors such as selenium, selenium/tellurium, selenium/arsenic, amorphous silicon, cadmium sulfide, and zinc oxide, and organic photoreceptors such as dye composites. While rotating a conductive drum 1 having a photoconductive photoreceptor layer with a thickness of 5 to 100 μm, the photoreceptor layer is uniformly charged by corona discharge in a dark place. An arbitrary pattern 2 is exposed thereon, and the exposed part of the charge on the surface of the photoreceptor is passed through to the conductive substrate on the back side, thereby forming an electrostatic latent image of the above pattern on the photoreceptor. Powdered adhesive is stored in an adhesive box 3, charged with a rotating metal brush or brush 4 made of magnetic powder to an opposite charge to the electrostatic latent image, and then transferred to a drum by Coulomb force. It adheres to the electrostatic latent image above. The adhesive adhered to the electrostatic latent image on the drum is transferred to the cloth or knit product 8 placed on a belt 6 driven by a roller 5 at the same circumferential speed as the drum 1. The image is transferred by Coulomb force from the electrode 7 on the opposite side. Then, while moving on the belt 6, a heat source 9 such as infrared heating, high frequency dielectric heating, hot air, etc.
is heated and fixed onto the adherend. (2) As shown in FIG. 2, before or after the cloth or knitted product 8 to which the adhesive has adhered passes through the heating device, the cloth or knitted product 8 is heated by the guide 11 while or after being folded. The fabric is bent and bonded by heat and pressure bonding using the roll 10. (3) As shown in Fig. 3, another cloth or knit product 8'' is superimposed on the cloth or knit product 8' to which the adhesive has been applied, and the adhesive is bonded by heating and pressing with a hot roll 10. 15. Adhesion in the present invention by a method of bringing an insulating medium close to a photoconductor, transferring a powder image from the photoconductor onto the insulating medium, and then retransferring the powder image on the medium to cloth. An example of the fabric manufacturing method is shown in Fig. 4. The powdered adhesive transferred to the insulating belt 12 is transferred to the transfer roller 1 which has a corona charger inside.
3 and 13', the image is electrostatically transferred to the cloth 8. The cloth 8' to which this adhesive has adhered is connected to another cloth 8'' and a heated roller 1.
4 and 14' to obtain a bonded fabric of 15. An example of a method for producing adhesive cloth by bringing a releasable medium close to a photoreceptor, transferring a powder image from the photoreceptor to the releasable medium, and then retransferring the powder image on the medium to cloth. is shown in Figure 5. The powdered adhesive adhering to the electrostatic latent image on the drum 1 is electrostatically transferred by the electrode 7 onto a release belt 16 that moves at the same circumferential speed as the drum 1. Then, the cloth or knit product 8 fixed on the support belt 17 is brought into contact with the adhesive on the release belt by means of heat rolls and pressure rolls 18 and 19, and the adhesive is applied onto the cloth or knit product. Heat transfer. [Operation] In the present invention, a known electrophotographic technique is utilized. As the developing method, both the magnetic brush method and the cascade method can be used appropriately. For example, both methods can be used depending on the particle size of the adhesive to be applied. When an adhesive having an average particle size of 50 μm or more is charged and attached to the surface of the photoreceptor layer, it is preferable to use a carrier having an average particle size of 200 μm or more. In this case, if the magnetic brush method is used, the magnetic poles with the magnetic force normally used cannot balance well with the gravity of the carrier, making it difficult to visualize the adhesive on the surface of the photoreceptor layer. It can be difficult. However, if a cascade method is used in which a developer (a mixture of carrier and powder adhesive) is caused to flow down by gravity, it is relatively easy to visualize the electrostatic latent image. When the average particle size of the adhesive is 50 μm or less, it is preferable to use a carrier with an average particle size of 50 to 200 μm, and a compact and versatile magnetic brush method can be used. The developer used in the present invention is a mixture of a powdered adhesive and a carrier, and is triboelectrically charged. The mixing ratio of powder adhesive and carrier is 0.5:
A ratio of 99.5 to 20:80 parts by weight is preferred; if the amount of carrier is less than this mixing ratio, appropriate triboelectrification becomes difficult. The developer thus prepared is used to visualize the latent image on the surface layer of the photoreceptor. The adhesion amount of the powder adhesive used in the present invention is
The amount is 0.1g to 400g, preferably ² to 200g per 1m2 of cloth or knitted product, and the amount of adhesion depends on the particle size of the powder, the amount of charge, the exposure time, the corona discharge voltage, the distance and voltage between the magnetic brush and the photoreceptor, It is adjusted by the photoreceptor surface potential, etc. For example, in the magnetic brush method, the number of adhesive particles that adhere to the photoreceptor surface layer can be increased by increasing the potential on the surface of the photoreceptor and decreasing the amount of charge on the adhesive particles. In reversal development, the amount of powder adhesive adhered to the photoreceptor can be increased by increasing the potential difference between the exposed and non-exposed areas of the photoreceptor surface and reducing the amount of charge on the adhesive particles. The corona discharge voltage in the present invention is 3000~
12000V is preferable; if it is higher than that, there is a risk of damage to the photoreceptor drum. The photoreceptor surface potential is
It is desirable to set it to 300-1000V. The amount of charge of the adhesive particles is preferably 2 to 50 μc/g, and if it is larger than 50 μc/g, the amount of adhesive that adheres to the surface of the photoreceptor will be small, and the adhesive force after bonding the cloth will be weak. Become. If it is smaller than 2 μc/g, the amount of adhesion to the surface of the photoreceptor increases, but it may not be transferred well during transfer by Coulomb force and may remain attached to the photoreceptor, causing stains. This can be avoided by increasing the corotron voltage during transfer, but if the voltage is too high, the photoreceptor drum will be damaged. Corotron voltage is preferably 3000 ~
It is 12000V. [Examples] The present invention will be specifically explained below with reference to Examples, but the present invention is not limited to these Examples. Note that parts in the examples are based on weight. Example 1 166 parts of terephthalic acid, 83 parts of isophthalic acid, 23 parts of fumaric acid, 180 parts of 1,4-butanediol, 62 parts of ethylene glycol, and as an esterification catalyst,
0.5 part of di-n-butyltin oxide and 0.2 part of 2-methylhydroquinone as a polymerization inhibitor were added and reacted to synthesize a prepolymer polyester having a hydroxyl group at the terminal (number average molecular weight
6200). 12 parts of acrylic acid and 20 parts of ethylene glycol were added to this, and polyester acrylate was synthesized by transesterification. The softening point of the obtained polyester acrylate was 92°C as measured using the ring and ball method. Furthermore, the melt viscosity at 110°C was 12,000 cps. The polyester acrylate was coarsely crushed, 1 part of negative charging charge control agent SD-11 (manufactured by Hodogaya Chemical Co., Ltd.) was added to 100 parts of the resin, melt-kneaded, freeze-pulverized, and averaged by air classification. A powder adhesive with a particle size of 37μ was prepared. A developer was prepared by mixing 1 part of the powdered adhesive with 100 parts of iron powder having an average particle size of about 200 μm. The charge amount of this developer by the blow-off method was 8 μc/g. The developer thus obtained is applied to a commercially available copier (Canon).
NP-5000) into the developing device of the modified device,
A Tetron/cotton (65/35) broad cloth cut into A4 size was placed in the paper feed section. The surface of the photoreceptor is uniformly positively charged, then a strip pattern of 15 cm in length and 5 cm in width is exposed, developed with a negatively charged powder adhesive, and adhered onto the photoreceptor. Transfer was made onto the fabric by positive corona charge. The amount of powder adhesive adhered to the cloth was examined and found to be 4.3 g/m ² . Subsequently, a similar type of fabric was layered on top of the fabric, and the fabric was passed between two hot rolls heated to 140°C and pressed together to obtain an adhesive fabric. NHV for the adhesive fabric thus obtained.
A cured adhesive cloth was obtained by irradiating an electron beam once using a QUATRON (manufactured by Nissin High Voltage Co., Ltd.) under the conditions of an acceleration voltage of 200 KV, an electron current of 5.4 mA, a line speed of 16.7 m/min, and an irradiation dose of 3 Mrad. . The cured adhesive cloth was subjected to a dry cleaning test and a washing test, and then the T-peel adhesive strength was measured. The results are shown in Table 1. The same test was also conducted on the adhesive cloth before electron beam irradiation, and a comparison was made before and after electron beam irradiation.

[Table] Γ Test details T-peel test: 22℃, tensile speed 100mm/min. Dry cleaning test: in Perclean, 25
℃, 10 minutes x 5 times Washing test: In 0.5% flake Marcel soap aqueous solution, 60℃ (bath ratio 1:50), 10 minutes x 5 times After electron beam irradiation, T-peel adhesion in a constant temperature layer at 70℃ When the strength was measured, it was 515 g/25 mm. Thus, it is clear that after electron beam irradiation, the adhesive is three-dimensionally cured, and its adhesive properties, solvent resistance, water resistance, and heat resistance are all improved. Example 2 Urethane acrylate was synthesized from 500 parts of the prepolymer polyester having a hydroxyl group at the end synthesized in Example 1, 28.1 parts of tolylene diisocyanate, and 18.7 parts of 2-hydroxyethyl acrylate, and coarsely ground. The softening point of the obtained polyurethane acrylate was 97°C as measured using the ring and ball method. Also, the melt viscosity at 120℃ is
It was 13500cps. The urethane acrylate 100
2 parts of aniline black dye (Nigrosine BK, manufactured by Orient Chemical Co., Ltd.) was added to the mixture, melt-kneaded, frozen and crushed, and air classified to obtain powdered urethane acrylate having an average particle size of 70 μm. 2 parts of the powdered urethane acrylate and 100 parts of iron powder with an average particle size of 500μ
A developer was prepared from The amount of charge of this developer by the blow-off method was 6 μc/g, which was of positive polarity. The above developer was placed in the cascade type developing device of a modified commercially available printer (Showa Information Equipment S-840-K) that has a pattern generation function using the optical fiber tube method, and a polyester film cut into A4 size sheets was fed. It was set in the paper section. In addition, we adjusted the printer's control device to achieve a line width of 0.8 mm by dividing the dots into 32 dots per inch.
The pattern generator was adjusted so that a grid pattern consisting of vertical and horizontal lines with a line spacing of 2.8 mm was generated. The surface of the photoreceptor was uniformly charged to a positive polarity, a pattern-controlled light signal was irradiated in a pattern with an optical fiber tube to form an electrostatic latent image, and then a powder image was deposited on the photoreceptor. Thereafter, it was transferred to a polyester film using negative corona charge. After neutralizing the polyester film, a Tetron cut into A4 size paper was placed on the film with powder attached to it, which was moved to the conveyance section.
A powder image was similarly transferred to the broad cloth by placing a cotton (65/35) broad cloth and moving the corona charger set on the broad cloth. When the amount of powder adhesive adhered to the cloth was investigated,
It was 5.2 g/cm ² . Subsequently, a similar type of fabric was layered on top of the fabric, and the fabric was passed between two hot rolls heated to 140°C to be pressed together to obtain an adhesive fabric. The adhesive fabric thus obtained was irradiated once with an electron beam using NHV Kyuatron (manufactured by Nissin High Voltage Co., Ltd.) under the same conditions as in the example to obtain a cured adhesive fabric. The cured adhesive cloth was subjected to a dry cleaning test and a washing test in the same manner as in Example 1, and then the T-peel adhesive strength was measured. The results are shown in Table 2. The same test was also conducted on the adhesive cloth before electron beam irradiation, and a comparison was made before and after electron beam irradiation.

〔Effect of the invention〕

According to the method of the present invention, a powder adhesive is applied onto cloth or knitted products according to an arbitrary pattern consisting of dots, lines, planes, or a combination thereof, and the adhesive is heat-fixed as it is to form a core. It is possible to give the cloth a shape-retaining effect without using a base. Alternatively, after adhering the adhesive, the adhesive cloth can be continuously and efficiently manufactured by heating and pressing the cloth while folding it or by heating and pressing it while overlapping another cloth. As a result, it is possible to omit the interlining pasting process or interlining sewing process, simplify the sewing process, and replace some sewing assembly processes with adhesive, which will play a role in automating and speeding up the sewing process. is large. In the present invention, an adhesive fabric obtained using an ionizing radiation-curable resin as an adhesive is irradiated with ionizing radiation to make the adhesive three-dimensional, thereby improving adhesive properties.
Although attempts were made to improve solvent resistance and water resistance, as shown in the examples, the adhesive fabric obtained by the method of the present invention has excellent adhesive strength, solvent resistance, water resistance, and heat resistance. This solves the conventional problems of rough texture, adhesive seepage, etc. Further, by using an ionizing radiation-curable adhesive, the adhesive processing speed, which is an important factor for speeding up the sewing process, can be significantly improved. In this way, by adopting a series of processes such as automatic application of arbitrary patterns, adhesion, and electron beam curing,
Automating and speeding up the sewing process, improving adhesive performance,
Energy saving can be greatly promoted.

[Brief explanation of the drawing]

1 to 5 are schematic plan views of apparatuses used in the cloth bonding method of the present invention. 1... Conductive drum, 2... Pattern, 3... Adhesive box, 4... Brush, 5... Roller, 6... Belt, 7... Electrode, 8, 8', 8''... Cloth or knit product, 9... Heat source, 10 ...heat roll, 11...guide,
12... Insulating belt, 13, 13'... Transfer roller, 14, 14'... Heat roller, 15... Adhesive cloth,
16... Release belt, 17... Support belt, 18... Heat roll, 19... Pressure roll.

Claims (1)

[Scope of Claims] 1. A conductive photoreceptor layer provided on a conductive substrate is uniformly charged by corona discharge, and the charged surface of the photoreceptor layer is exposed to light in an arbitrary pattern so that the charged surface is The electrostatic latent image of the pattern, which is an unexposed area with a large amount of surface charge remaining, is formed on the surface of the photoreceptor layer by reducing the charge on the exposed portion of the photoreceptor layer, and the electrostatic latent image has a polarity opposite to that of the electrostatic latent image. Either by using a charged powdered ionizing radiation-curable adhesive, or by forming an electrostatic latent image of the pattern, which is the exposed area with reduced surface charge, and charging it to the same polarity as the electrostatic latent image. The electrostatic latent image is visualized using a powdered ionizing radiation-curable adhesive, and the image formed on the surface of the photoreceptor is directly printed on a cloth or a sheet of paper. Prepare an adhesive fabric with the adhesive adhered in the pattern by electrostatically transferring it to a product or electrostatically transferring it to another medium surface and then retransferring it to a cloth or knitted product. The fabric can be bonded with or without heating to the fabric or knitted product, by folding a part of the bonded fabric and overlapping it, or by overlapping another fabric or knitted product and heating it to fuse the adhesive. A method for bonding cloth, which comprises bonding and then curing the adhesive by irradiating it with ionizing radiation. 2 Cloth or knit products are kept at 30℃ and relative humidity 75%.
The bonding method according to claim 1, wherein the bonding method is made of a fiber material having a surface specific resistance of 5×10 ⁵ Ωcm or more. 3. The other medium is a medium having an insulating surface,
2. The adhesion method according to claim 1, wherein the retransfer to cloth or knit products is electrostatic transfer. 4 The medium with an insulating surface is a film, sheet, belt, or roll, and the volume resistivity of the material forming the surface is 30°C and relative humidity.
The bonding method according to claim 3, wherein the adhesiveness is 5×10 ⁶ Ωcm or more at 75%. 5. The other medium is a medium having a releasable surface,
2. The adhesion method according to claim 1, wherein the retransfer to cloth or knit products is thermal transfer or pressure transfer. 6. The bonding method according to claim 5, wherein the medium having a releasable surface is a film, sheet, belt, or roll, and the material forming the surface has a critical surface tension of 32 dyne/cm or less. . 7 Adhesive fabric per 1 cm ² of cloth or knit product
The bonding method according to any one of claims 1 to 6, wherein the bonding method has an adhesive adhesion amount or fusion bond amount of 0.1 g to 400 g.