JP3259078B2 - Method for producing printing base fabric having microporous film - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a printing base fabric used in a printing method using a printing machine using an aqueous or oil-based ink liquid or a printing method using a thermal transfer printing machine using a thermal transfer ink film.

[0002]

2. Description of the Related Art Conventionally, as a method for producing a printing base fabric such as a display label for clothing or the like, a nylon fiber base material is impregnated with a solution of a nylon resin dissolved in a calcium chloride / methanol solvent. Coating and gelling in water to form a microporous ink absorbing layer, or applying a polyacrylate resin or thermoplastic polyurethane resin to a polyester fiber substrate and drying to absorb non-porous ink A method of forming a layer and the like are known. However, the former has a problem that the strength of the microporous surface is weak, so that the former is easily peeled off with an adhesive tape or the like, and the latter is peeled off during continuous printing, so that the printed characters are easily clogged. Furthermore, this type of product is limited to nylon fiber base material from the viewpoint of adhesiveness, easily curls when a resin layer is formed on one side in order to obtain a soft texture, and even if impregnated coating is applied to nylon fiber base. Since the fiber base material itself easily absorbs moisture, there are problems in dimensional stability, and there are drawbacks such as an extremely strong vinyl feeling, a hard texture, and a lack of luxury. In the latter case, the productivity is high, the production cost is low, but the ink absorption is lacking due to the non-porous nature, and the printing conditions such as the type of ink, printing pressure, and drying are limited in reality. .

[0003]

SUMMARY OF THE INVENTION The present invention is directed to a printing method using a printing machine using a water-based or oil-based ink liquid, or a thermal transfer ink film, having improved softness, excellent surface peel strength, and improved these disadvantages. An object of the present invention is to provide a method for producing a printing base fabric excellent in ink transferability suitable for a printing method using a thermal transfer printing machine to be used.

That is, the present invention relates to a method of dissolving a thermoplastic polyurethane resin having a 100% modulus of 80 to 200 kg / cm ² in a polar organic solvent solution on a polyester fiber base material having an adhesive layer formed on one surface in advance. And then gelling in warm water, washing with water, and drying to form a microporous film having a thickness of 30 to 70 μm with excellent surface peel strength and adhesive strength. The adhesive layer is made of a thermoplastic polyurethane resin, contains 0.3 to 2% by weight of a polyisocyanate crosslinking agent, is dissolved and applied in a polar organic solvent solution, then gelled in warm water, washed with water, and dried. The thickness formed from that is 5 to 15
It is a microporous film of μm.

The present invention will be described in more detail. The fiber base material of the printing base fabric according to the present invention is a polyester fiber,
It may be a woven or non-woven fabric.

[0006] The resin solution for the adhesive layer used in the present invention is used by mixing a thermoplastic polyurethane resin, a polyisocyanate crosslinking agent and a polar organic solvent solution. As the thermoplastic polyurethane resin, an ester type or an ether type can be used. The amount of the polyisocyanate crosslinking agent used is preferably 0.3 to 2% by weight, more preferably 0.6 to 1.3% by weight. 0.3 usage
When the amount is less than 2% by weight, the adhesive strength of the resin to the fabric is poor.

Examples of the polyisocyanate crosslinking agent used in the present invention include compounds having two or more isocyanate groups such as diisocyanate crosslinking agents and triisocyanate crosslinking agents. For example, 2,4- (2,6-) tri- Diisocyanate, diphenylmethane-4,4, -diisocyanate, 1,4-naphthalenediisocyanate,
Diisocyanate crosslinking agents such as isophorone diisocyanate and hexamethylene diisocyanate; and compounds having 3 moles of these diisocyanate crosslinking agents and three active hydrogens, such as trimethylolpropane and glycerin.
It can be arbitrarily selected from a triisocyanate crosslinking agent obtained by an addition reaction with a mole, and the like.

[0008] The resin solution for the skin layer used in the present invention is a mixture of a thermoplastic polyurethane resin, a surfactant and a liquid of a polar organic solvent. As the thermoplastic polyurethane resin, an ester type or an ether type can be used,
100 modulus 80~200Kg / cm ^2, it is desirable that preferably is 100~150Kg / cm ^2. If it is less than 80 kg / cm ² , the surface of the film to be formed will be sticky, so that when printing with a printing machine using an ink liquid, the base fabric will easily adhere to the stamp plate, and the running property will be poor. Conversely, if it exceeds 200 kg / cm ² , the texture hardens, which is not preferable. Further, a thermoplastic polyurethane resin having a softening point of 160 to 200 ° C is selected. If the temperature exceeds 200 ° C., the thermal transfer printability is undesirably reduced. As the surfactant, a commercially available nonionic surfactant is used in an amount of 0.6 to 4% by weight.

As the polar organic solvent solution for preparing the resin solution for the adhesive layer and the skin layer used in the present invention, dimethylformamide, dimethylsulfoxide, tetrahydrofuran and the like can be used, but dimethylformamide is most preferred. The resin solution for the adhesive layer is coated on one side of the fiber base material which has been subjected to a heat calendering treatment or a water-repellent treatment in advance by a coating method using a floating knife coater or a gravure coater.
It is applied to a thickness of 15 μm, then gelled in warm water, washed with water and dried. Thereafter, the resin solution for the skin layer is coated on the adhesive layer by a coating method using a knife over roll coater, a reverse roll coater or a comma coater to a thickness of 30 μm.
It is applied so as to have a thickness of up to 70 μm and gelled in warm water. After gelling in warm water, the fabric is washed with hot water to remove residual solvent. After washing with hot water, dry.

[0010]

Next, the present invention will be described in more detail with reference to Examples and Comparative Examples.

EXAMPLE Polyester woven fabric (100% polyester, warp 50d)
/ 24f, taffeta of weft 75d / 36f), and after scouring and setting by a usual method, padding with a 3% aqueous solution of Asahigard 730 (a product of Asahi Glass Co., Ltd.) of a fluorinated water repellent emulsion. (Aperture ratio 35%)
Then, a heat treatment was performed at 130 ° C. for 1 minute. Next, a resin solution represented by the following formula A was applied using a floating knife coater so that the thickness of the film formed was 10 μm, and then gelled in hot water, washed with hot water, and dried. Subsequently, a resin solution represented by the following formulation B was applied using a knife over roll coater so that the thickness of the film formed was 50 μm, and then immersed in warm water for 2 minutes to gel the resin component. Subsequently, after washing in warm water for 10 minutes, drying was performed to obtain a printing base fabric of the present invention. The performance of the obtained printing base fabric was measured and evaluated, and the results are shown in Table 1. Formulation A Crisbon 8006HV 100 parts by weight (thermoplastic polyurethane resin, 100% modulus: 35 kg / cm ² , manufactured by Dainippon Ink and Chemicals, Inc.) Resamine X-100 crosslinking agent 1.5 parts by weight (polyisocyanate crosslinking agent, large Nissei Chemical Industry Co., Ltd.) Dimethylformamide 50 parts by weight Formulation B Crisbon 1846EL 100 parts by weight (thermoplastic polyurethane resin, 100% modulus: 90 kg / cm ² , product of Dainippon Ink and Chemicals, Inc.) Chrisbon Assister SD- 72 parts by weight (nonionic surfactant, product of Dainippon Ink and Chemicals, Inc.) 50 parts by weight of dimethylformamide

Comparative Example Nylon woven fabric (6-nylon 100%, warp 70d / 1)
2f, a weft 70d / 24f taffeta) is impregnated with a nylon resin paint having the following composition so that the coating amount is 120 g / m ² . This was immersed in water for 5 minutes, then washed with water and dried to obtain a printing base fabric. 6-nylon 20 parts Methyl alcohol 50 parts Calcium chloride 25 parts Calcium carbonate 10 parts

The adhesive strength, surface peel strength and hand of the printing base fabrics obtained in these Examples and Comparative Examples were tested as follows. (1) Adhesive strength A test is performed in accordance with JIS K-6328 “Testing method for adhesion strength between rubber layer and cloth layer or between cloth layer and cloth layer of rubberized cloth”. (2) Surface peel strength 1.8 cm wide and 5 cm long on the surface of the resin film of the printing fabric
Scotch tape (Sekisui Chemical Co., Ltd., product number: 252)
Is pressure-bonded at a pressure of 3 kg / cm ² , and then the cellophane tape is peeled off from the base fabric for printing, and the amount of the resin film adhered to the cellophane tape side and peeled off is determined by the transparency of the cellophane tape. Criteria ：: Almost transparent (there is almost no peeling) ×: White turbid (peeled) (3) Texture Criteria ：: Soft touch ×: Hard touch (4) Printability (a) Thermal transfer Printability in printing machine: The printing machine uses B-30-HT manufactured by Tokyo Electric Co., Ltd., and the ink ribbon prints on the printing fabric using the company's high-tech ribbon.
Judgment is based on the sharpness of the printed characters. Judgment criteria ○: Clear ×: Not clear (b) Printability in a printing press using an ink liquid: The printing press is Quicker F manufactured by Western Futaba Label Machine Co., Ltd.
Using PM-3, the ink is printed on the printing base fabric with FT Sumi NO2 manufactured by Dainippon Ink and Chemicals, Inc., and judgment is made based on the sharpness of the printed characters. Judgment criteria ○: Clear ×: Not clear The results are shown in Table 1.

[0014]

The printing base fabric of the present invention has a soft texture having a microporous film having excellent surface peel strength and adhesive strength using polyester fiber as a base material,
It shows excellent printability not only for printing by a printing machine using aqueous and oil-based ink liquids, but also for printing by a thermal transfer machine using a thermal transfer ink film.

[Table 1]

[Brief description of the drawings]

FIG. 1 is a sectional view of a printing fabric according to the present invention.

[Description of Signs] 1 ... Skin layer 2 ... Adhesive layer 3 ... Fiber base material

──────────────────────────────────────────────────続 き Continuation of the front page (56) References JP-A-60-190393 (JP, A) JP-A-58-60082 (JP, A) JP-A-54-18971 (JP, A) 188862 (JP, A) JP 40-7239 (JP, B1) (58) Fields investigated (Int. Cl. ⁷ , DB name) D06M 15/00-15/715 B41M 5/00 D06P 5/00 112

Claims (3)

(57) [Claims] 1. A 100% modulus of 80 to 200 kg is applied to a polyester fiber base material having an adhesive layer formed on one side in advance.
/ Cm ² by dissolving a thermoplastic polyurethane resin in a polar organic solvent solution, applying the same over the adhesive layer, gelling in warm water, washing with water, and drying to obtain excellent surface peel strength and adhesive strength. 30-70 microporous
A method for producing a printing base fabric, comprising forming a μm film. 2. The adhesive layer according to claim 1, wherein said adhesive layer comprises a thermoplastic polyurethane resin and contains 0.3 to 2% by weight of a polyisocyanate crosslinking agent, and is applied by dissolving with a polar organic solvent solution and then gelling in warm water. A method for producing a printing base fabric having a microporous film, wherein the microporous film has a thickness of 5 to 15 μm formed by washing, drying and drying. 3. The adhesive strength according to claim 1, wherein the adhesive strength is 300 to 400 g /
cm, a method for producing a printing base fabric.