JPH1018165A - Cloth for heat-transfer printing label and its production - Google Patents

Abstract

PROBLEM TO BE SOLVED: To obtain a cloth for a heat-transfer printing label capable of forming an image having excellent printing clearness, adhesivity, fastness and washing durability by laminating a specific cloth piece with a hot-melt adhesive film. SOLUTION: A cloth such as woven or knit fabric composed mainly of a polyester fiber having a single fiber fineness of 0.0001-1de is calendered at 100-170 deg.C under a pressure of 10-500kg/cm<2> . The non-calendered face of the cloth is laminated to a hot-melt adhesive film made of a polyester resin, etc., at a temperature above the glass transition point and below the softening point of the hot-melt adhesive film to obtain the objective cloth for a heat-transfer printing label having a surface roughness of the printing face characterized by a center-line average roughness of 4-40μm in either warp or weft direction, a center-line average roughness of 3-8μm in the other direction and a maximum height of 30-75μm.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a fabric suitable for recording characters, images, identification marks, and the like, and a method for producing the same. More specifically, the present invention relates to a fabric capable of obtaining clear printing by a thermal transfer printing method using a dye, and a method for producing the same.

[0002]

2. Description of the Related Art As a method of printing an image on a cloth, a method using a conventional printer such as a thermal transfer system, an ink jet system, and a dot impact system is known.

Japanese Patent Application Laid-Open No. 57-102390 discloses a method in which an image is formed on a master paper by a thermal transfer method using a sublimable disperse dye, and then the image is transferred to a fabric by heat press. ing.

[0004]

However, in the conventional printing method using a printer, a coloring agent such as a pigment or a dye is fixed only in the vicinity of the surface of the fibers forming the fabric, and the printability is poor. Is inferior to

In the method disclosed in Japanese Patent Application Laid-Open No. 57-102390, dyeing is sufficiently performed, but fastness is not sufficient, and there is a problem that continuous printing is difficult since the image is once transferred to master paper. .

SUMMARY OF THE INVENTION The present invention has been made in view of the above-mentioned drawbacks of the prior art, and has as its object to provide a heat transfer printing label fabric on which an image having excellent fastness and sharpness is formed, a method for producing the same, and a method for manufacturing the same. An object of the present invention is to provide a method for manufacturing a print label using a fabric.

[0007]

According to the present invention, there is provided a thermal transfer printing label fabric comprising:
At least the surface roughness of the printing surface of the fabric has a center line average roughness of 4 μm or less and a maximum height of 40 μm or less in one of the warp or weft directions, and another has a center line maximum roughness of Maximum height is 30 at 3μm or more and 8μm or less
It is characterized in that it is not less than μm and not more than 75 μm.

In the method for producing a thermal transfer printing label fabric according to the present invention, the fabric is calendered at a temperature of 100 ° C. or more and 170 ° C. or less and a pressure of 10 kg / cm ² or more and 500 kg / cm ² or less. The calender surface and the heat-sealing adhesive film are laminated at a temperature equal to or higher than the glass transition point and lower than the softening point of the heat-sealing adhesive film.

Further, in the method for producing a print label of the present invention, a temporary image is formed on a printing surface of the thermal transfer printing label fabric obtained as described above by a thermal transfer method using a thermal transfer ink ribbon mainly composed of a dye. By laminating the heat-fusible adhesive film layer on the fabric to be bonded with the film layer facing down and heating, the prints are dyed and simultaneously bonded.

The center line average roughness and the maximum height referred to in the present invention are based on the definition and display of the surface roughness defined in JIS B0601, and when the cut-off value is 80 μm and the measurement length is 800 μm, the JIS B0601 is used. Use a stylus-type surface roughness measuring device to determine the tip radius of curvature 2μ.
It is measured using a stylus of m.

[0011]

BEST MODE FOR CARRYING OUT THE INVENTION The fabric used in the thermal transfer printing label fabric of the present invention is not particularly limited, and it is a woven fabric or a nonwoven fabric made of natural fibers such as cotton and silk, and synthetic fibers such as polyamide and polyester. Although a woven fabric is preferable from the viewpoint of dimensional stability, a polyester-based fiber, especially a fabric mainly composed of ultrafine fibers having a single fiber fineness of 0.0001 denier or more and 1 denier or less has excellent surface smoothness. This is preferable because a clear image can be obtained during printing. Preferably, it is not less than 0.01 denier and not more than 1 denier. Further, a fabric in which two kinds of ultrafine fibers of a polyamide fiber and a polyester fiber are well mixed is preferable because it has a dense surface and, consequently, a surface excellent in smoothness. It is also a preferable method to apply a high-speed fluid flow treatment (water jet punch) to the surface of the ultrafine fabric to open and / or entangle the ultrafine fibers to densify the surface. The method for producing these ultrafine fibers is not particularly limited, and ordinary various techniques can be used. In the thermal transfer printing label fabric of the present invention, at least the surface roughness of the printing surface of the fabric is one of the longitudinal direction and the weft direction. , The center line average roughness is 4 μm or less and the maximum height is 40 μm or less, and on the other hand, the center line maximum roughness is 3 μm or more and 8 μm or less and the maximum height is 30 μm or more and 7 μm or less.
It is important that the thickness is 5 μm or less.

In the case of thermal transfer printing, an image such as a character is transferred by thermal energy from a smooth print head. Therefore, the printing surface of the cloth is preferably smoother.
In the case of dyeing and printing on a fabric, the print is darker when ink penetrates to some extent between the fibers of the fabric, and when the print is too smooth, the print tends to be faint. Therefore, as in the present invention, the surface roughness in one of the longitudinal direction and the weft direction has a center line average roughness of 4 μm or less and a maximum height of 40 μm or less,
On the other hand, if the maximum roughness of the center line is 3 μm or more and 8 μm or less and the maximum height is 30 μm or more and 75 μm or less, the ink will permeate between the fibers with appropriate smoothness suitable for thermal transfer and clear. Printing can be obtained. Preferably, in one of the warp direction and the weft direction, the center line average roughness is 4 μm or less and the maximum height is 35 μm or less, and in the other, the center line maximum roughness is 3.5 μm or more and 7 μm or less.
Below, the maximum height is 40 μm or more and 70 μm or less.

Here, the warp direction and the weft direction of the fabric are the direction of the warp and the direction of the weft in the case of a woven fabric, respectively, and in the case of the warp knitting, the warp direction of the warp, that is, the knitting direction. The longitudinal direction is the warp direction (the same applies to the case of weft knitting), and the width direction of the knitted fabric is the weft direction. In the case of a nonwoven fabric, the width direction of the die is the weft direction, and the longitudinal direction is the warp direction.

In the heat-transfer printing label fabric of the present invention, the non-printing surface of the woven fabric laminated with a heat-sealing adhesive is easily adhered to a cloth to be adhered to clothes or the like with an iron or the like when the label is formed. This is preferred because

The heat-sealing adhesive used in the present invention is not particularly limited as long as it has thermoplasticity at the bonding temperature.
A vinyl chloride resin type or the like is used. In particular, polyester resin is preferable because it is excellent in the washing resistance of bonding. In the present invention, it is important that the peel strength between the laminated fabric and the heat-sealing adhesive is 30 g / cm or more and 150 g / cm or less. is there. If it is less than 30 g / cm, the heat-sealing adhesive is easily peeled off before bonding to a cloth to be bonded such as clothes.
On the other hand, if it exceeds 150 g / cm, the heat-sealing adhesive permeates the label side rather than the cloth to be adhered when adhering to the cloth to be adhered such as clothes, and the adhesive strength becomes insufficient. More preferably, 40 g / cm or more and 120 g / cm
It is as follows.

In the method for producing a thermal transfer printing label fabric of the present invention, the fabric is calendered under the conditions of a temperature of 100 ° C. to 170 ° C. and a pressure of 10 kg / cm ^{2 to} 500 kg / cm ² . As a result, a fabric is obtained in which the ink permeates between the fibers moderately, while having smoothness suitable for thermal transfer. In particular, the degree of single fiber is mainly 0.0001.
The effect is great when a cloth made of polyester fibers of 1 denier is used. More preferred calendar conditions are:
Temperature 100 to 150 ° C, pressure 20 to 150k
g / cm ² or less. The apparatus used for calendering is not particularly limited, and an arbitrary apparatus such as a three-roll apparatus may be used.

In the method for producing a thermal transfer printing label fabric according to the present invention, the calendered non-calendered surface of the fabric is provided with a heat-sealing adhesive film having a softening point above the glass transition point of the heat-sealing adhesive film. Laminate at a temperature less than. Below the glass transition point, the heat-fusible adhesive film is not pressed against the fabric at all, and above the softening point, the heat-fusible adhesive film undesirably permeates the fabric too much.

The pressure at the time of lamination is appropriately selected according to the heat-sealing adhesive film to be used. In the case of a polyester resin-based heat-sealing adhesive film, the pressure is 1 kg / cm ² or more and 8 kg / cm ² or less. Is preferred. The laminating apparatus used in the present invention is not particularly limited, and any apparatus such as a hot roll type or a flat plate press can be used.

In the method for producing a print label according to the present invention,
A temporary image is formed on the printing surface of the thermal transfer printing label fabric obtained by the above method using a thermal transfer ink ribbon mainly composed of a dye by a thermal transfer method, and the temporary image is heated to fix and fix the image. In the present invention, at the time of provisional image formation, only a substance in which a dye is dispersed in a binder is placed on the fabric, and there is no dyeing inside the fibers constituting the fabric. The dye is dyed to the fibers constituting the fabric only after the subsequent heating.

In the present invention, the dye used in the thermal transfer ink ribbon is not particularly limited, such as a disperse dye and a basic dye, but it is preferable to use a dye having high sublimation fastness.
Specifically, it is sublimable and has a sublimation temperature of 180 ° C. or more and 3
The temperature is preferably not higher than 00 ° C, preferably not lower than 200 ° C and not higher than 250 ° C. If the sublimation temperature is lower than 180 ° C., the fastness of the printed image is deteriorated. In the present invention, the sublimation temperature refers to a temperature at which the vapor pressure (sublimation pressure) of the sublimable dye is equal to the external pressure.

In the present invention, the wax material used in the thermal transfer ink ribbon is not particularly limited, and examples thereof include ester wax, oxidized wax, caster wax, higher fatty acid monoglyceide and the like having a melting temperature of about 50 to 100 ° C.

In the present invention, the binder material used in the thermal transfer ribbon is not particularly limited, and examples thereof include xylene resin, polystyrene, ethylene-vinyl acetate copolymer, and polyacrylate which are compatible with the wax material. Can be

In the present invention, the oily substance used in the thermal transfer ink ribbon is not particularly limited, and examples thereof include vegetable oils such as rapeseed oil and castor oil, mineral oils such as motor oil and spindle oil, and plasticizers such as DOP and DBP. And the like.

The components used in these thermal transfer ink ribbons are mixed at a predetermined ratio, and are coated on a substrate by hot melt coating or dissolved or dispersed in an organic solvent and dried to form an ink layer. To form This is cut into a ribbon to form a thermal transfer ink ribbon.

In the method for producing a print label according to the present invention,
On the printing surface of the thermal transfer printing label fabric, a temporary image is formed by a thermal transfer method using a thermal transfer ink ribbon mainly composed of a dye, and the heat-sealing adhesive film layer is placed on the adhered fabric with Lamination is performed so that the fusion adhesive film layer side is in contact with the cloth to be bonded, and heating is performed to dye the print, and to bond the cloth to be bonded and the cloth for thermal transfer printing labels.

In ordinary printing and the like, since it is necessary to wash with water to remove excess dye and remove glue, the dyeing of the dye by heating and the adhesion to the cloth to be bonded with a heat-sealing adhesive are performed separately. However, in the present invention, since washing with water after dyeing is not necessary, the number of heating steps is reduced to one, and rationalization is performed. The apparatus used for heating is not particularly limited, but an iron, a hot press, or the like is preferably used. It is a preferable method to heat a sheet-like material such as a paper plastic film at least on the provisional image forming portion at the time of heating since the image is less likely to be displaced at the time of heating. It is also a preferred method to use a fluororesin-processed iron, a hot press or the like.

[0027]

EXAMPLES The present invention will be specifically described below with reference to examples, but the present invention is not limited to these examples.

Example 1 A high-density woven fabric made of ultrafine polyester filament fibers having a single fiber fineness of 0.06 denier and subjected to a water jet punch treatment was subjected to a calendering apparatus at a temperature of 125 ° C. and a pressure of 40 kg / cm. ² , speed; 20
Calendar processing was performed under the conditions of m / min. Next, the non-pressed surface and a 50 μm-thick polyester heat-sealing adhesive film (glass transition point: 23 ° C., softening point: 113
℃), using a roll-type laminating apparatus, temperature;
Attachment was carried out under the conditions of 15 ° C., pressure: 4 kg / cm ² , speed: 8 m / min to obtain a heat transfer printing label fabric. The surface roughness of the printing surface of this woven fabric was such that the center line average roughness was 2.8 μm and the maximum height was 28.1 μm in the weft direction, and the center line average roughness was 5.8 μm and the maximum height was in the warp direction. Is 59.3μ
m. The peel strength between the woven fabric and the heat-sealing adhesive film was 60 g / cm.

Using a commercially available thermal transfer ink ribbon using carbon black as a colorant, an image was formed on the woven fabric for thermal transfer printing labels using a commercial thermal transfer printer. The obtained image was very clear, and the readability when the barcode was printed was good.

Example 2 The thermal transfer printing label fabric of Example 1 had a thickness of 4.2 μm.
Using an ink ribbon obtained by coating an ink layer mainly composed of a disperse dye (CI Disperse Blue 330) on a polyester film (paraffin wax as a wax material, ethylene-vinyl acetate copolymer = 80 / 20) using a commercially available thermal transfer printer. This is cut into a label, placed on a cotton cloth with the heat-sealing adhesive film facing down, and heated with a Teflon-treated iron at a temperature of 190 ° C. for a time of 10 seconds to form an image by dyeing. At the same time, it was adhered to a cotton cloth to obtain a print label. The image of the obtained print label was very clear. The adhesion to the cotton cloth was very strong, and it did not peel off even after 50 times of industrial washing.

Comparative Example 1 A heat transfer printing label fabric was obtained in the same manner as in Example 1 except that the calender treatment was not performed. As for the surface roughness of the printing surface of the obtained woven fabric, the center line average roughness in the weft direction was 11.
59 μm, maximum height is 86.4 μm, center line average roughness in the warp direction is 13.6 μm, maximum height is 91.0 μm
m. When an image was formed on this woven fabric in the same manner as in Example 1, the image was thin and unclear, and could not be read even when a bar code was printed.

Comparative Example 2 A calendering treatment was conducted at a temperature of 190 ° C. and a pressure of 200 kg /
Example 1 except that the test was performed under the conditions of cm ² and a speed of 20 m / min.
In the same manner as in the above, a fabric for a thermal transfer printing label was obtained. A printed label in which an image was formed by dyeing on the obtained woven fabric in the same manner as in Example 2 was obtained. As for the image of the print label, only an unclear image having a thin print portion was obtained.

Comparative Example 3 The laminating temperature of the woven fabric and the heat-sealing film adhesive was set to 14
A heat transfer printing label fabric was obtained in the same manner as in Example 1 except that the temperature was changed to 0 ° C. The peel strength between the woven fabric and the heat-sealing adhesive film was 300 g / cm. Next, a print label was obtained in the same manner as in Example 2. Regarding the adhesive strength to the cotton cloth, the initial adhesive strength was good, but peeling occurred at the end of the label after about 30 times of industrial washing.

[0034]

Since the present invention is constructed as described above, the following effects can be obtained.

(1) A thermal transfer printing label fabric excellent in both transferability and print clarity in thermal transfer printing can be obtained.

(2) Further, by providing a heat-sealing adhesive layer on the back surface, it can be easily adhered to clothes or the like.

(3) The adhesiveness is very strong.

(4) By using a thermal transfer ink ribbon mainly composed of a dye, it is possible to obtain a printed label which is very clear in printing and has excellent dyeing properties and adhesive washing durability.

Claims (12)

[Claims] In a thermal transfer printing label fabric, at least the surface roughness of the printing surface of the fabric has a center line average roughness of 4 μm or less and a maximum height of 40 μm or less in one of a longitudinal direction and a weft direction. A heat transfer printing label fabric having a center line maximum roughness of 3 μm or more and 8 μm or less and a maximum height of 30 μm or more and 75 μm or less. 2. The thermal transfer printing label fabric according to claim 1, wherein the surface roughness of the printing surface of the fabric has a center line average roughness of 4 μm or less and a maximum height of 40 μm in one of the longitudinal direction and the weft direction.
μm or less, and on the other hand the center line maximum roughness is 3
Maximum height is 30 μm to 75 μm with a maximum size of μm to 8 μm
The heat-fusing adhesive is laminated on the non-printing surface of the fabric, and the peel strength between the heat-fusing adhesive and the fabric is 30 or less.
g / cm or more and 150 g / cm or less, a thermal transfer printing label fabric. 3. The thermal transfer printing label fabric according to claim 1, wherein the fibers constituting the fabric are mainly fibers having a single fiber fineness of 0.0001 to 1 denier. 4. The thermal transfer printing label fabric according to claim 1, wherein the fibers constituting the fabric are mainly polyester fibers. 5. The thermal transfer printing label fabric according to claim 2, wherein the heat-sealing adhesive is a polyester resin. 6. The thermal transfer printing label fabric according to claim 1, wherein the fabric is a woven or knitted fabric. 7. The fabric is calendered at a temperature of 100 ° C. or more and 170 ° C. or less and a pressure of 10 kg / cm ² or more and 500 kg / cm ² or less. A method for producing a fabric for thermal transfer printing labels, comprising laminating at a temperature not lower than the glass transition point and lower than the softening point of the adhesive film. 8. The method for producing a thermal transfer printing label fabric according to claim 7, wherein the fibers constituting the fabric are mainly fibers having a single fiber fineness of 0.0001 to 1 denier. 9. The fiber constituting the fabric is mainly made of a polyester fiber.
The method for producing a thermal transfer printing label fabric according to any one of the preceding claims. 10. The method for producing a thermal transfer printing label fabric according to claim 7, wherein the heat-sealing adhesive film is made of a polyester resin. 11. The method for producing a thermal transfer printing label fabric according to claim 7, wherein the fabric is a woven or knitted fabric. 12. A temporary image is formed on a printing surface of a thermal transfer printing label fabric obtained by the method according to any one of claims 7 to 11 by a thermal transfer method using a thermal transfer ink ribbon mainly composed of a dye. The bonded fabric and the thermal transfer label fabric are laminated via a heat-sealing adhesive film laminated on the thermal transfer print label fabric, and heated to dye the print and to be bonded. A method for producing a print label, comprising: adhering the heat transfer print label fabric to the fabric.