JPH0545717B2 - - Google Patents

Description

[Detailed Description of the Invention] [Industrial Field of Application] The present invention provides printing on the raised surface of a raised fiber sheet having fine fibers with a good color tone that does not impair the texture and has excellent color fastness. This paper relates to a printing method for forming .

[Conventional technology]

BACKGROUND ART Conventionally, a method of dyeing a raised surface of a sheet-like material having a fiber raised layer into a pattern by printing is already known. For example, Japanese Patent Publication No. 47-21279, Japanese Patent Application Publication No. 57-
Publication No. 95385 describes a clear coloring method that dyes the raised surface of pile carpets, furs, etc. up to the roots of the raised fibers by printing, without bleeding, and JP-A-59-116448 discloses a method for dyeing the raised surface of pile carpets, furs, etc. to the roots of the raised fibers, and provides a clear coloring method with no bleed. Japanese Patent Laid-Open No. 60-21881 discloses a method of dyeing the fluff of a suede-like sheet with a fiber-napped surface by printing. A method for dyeing the printed area and shortening the fluff fibers is described.

[Problem that the invention seeks to solve]

Conventionally, sheet materials having a raised surface of fibers have been colored by a printing method when the raised fibers are relatively thick, such as pile carpets and fur. Therefore, printing does not cause any major changes in the napping condition or the texture of the sheet, but if the fibers used are extremely thin, for example, with a fineness of 0.05 dr or less, the bending stiffness of the fibers will be small. Therefore, even if the size agent is removed after printing as in the past, it is not possible to restore the napped fiber surface to a sufficient level. The fluffiness and appearance of the fluff deteriorate significantly. And if you try to emphasize the three-dimensional effect through textile printing, the tendency for the problem to worsen will become even greater. At the same time, the printing friction fastness also deteriorates. Furthermore, with conventional glues mainly based on water-soluble resins, bleeding occurs due to dyeing, making it difficult to achieve a finish with clear outlines. On the other hand, a method of fixing the colorant by using a water-insoluble resin as a glue has been used, but this method has problems such as impairing the texture of the sheet.

[Means for solving problems]

The present invention is a printing method that does not impair the texture of the sheet by printing, has a clear colored outline and a three-dimensional appearance, and has high dyeing friction fastness, especially dyeing friction fastness in wet conditions. It is in.

That is, the present invention involves printing on at least one surface of a substrate made of a fiber structure mainly composed of fine fibers and/or bundles thereof containing an elastic polymer, on the fiber napped surface formed by the fiber ends of the constituent fibers. When coloring by this method, the main material of the printing paste is water-insoluble in the final solidified state, and the Young's modulus Y _R of the film obtained by forming the printing paste is 0.15 to 0.01.
Kg/mm ² and does not exceed the Young's modulus Y _P of the elastic polymer contained in the base material, water-based glue, water-insoluble or poorly water-soluble coloring agent, cross-linking agent, organic solvent, surfactant as necessary. This is a printing method for a napped fiber sheet having fine napped fibers, which is characterized by applying an aqueous composition containing an agent to the napped surface to form a printed colored surface fixed together with the napped fibers.

The napped fiber sheet having fine napped fibers of the present invention is disclosed in, for example, Japanese Patent Publication No. 55-504, Japanese Patent Publication No. 56-1987,
16235, JP-A-54-76801, etc. are applicable. That is, before or after the multicomponent fibers are made into fine fibers, an elastic polymer such as polyurethane elastomer is applied to a fiber structure such as an entangled nonwoven fabric made of at least two types of polymers having different properties. This is a napped fiber sheet in which at least one surface of the substrate obtained by containing the aggregate is treated to form a fiber napped surface using sandpaper or the like to form so-called suede-like fine fiber napped surfaces on the surface of the substrate. Furthermore, the napped fiber sheet may be made into a product by undergoing dyeing, softening treatment, etc.

The fine fibers of the present invention are single fibers or fine fiber bundles having a fineness of less than 0.1 denier, preferably in the range of 0.05 to 0.0001 denier.
If the fineness is 0.1 denier or more, not only will the texture of the fiber sheet become cloth-like, but after printing, there will be a mixture of areas where the napped fibers are fixed and areas where they are not, which impairs the appearance and feel, which is undesirable. On the other hand, if the denier is less than 0.0001 denier, the raised state of the printed area and the non-printed area cannot be clearly distinguished, resulting in a lack of three-dimensional effect.

Next, as for the printing paste used in the present invention, the main material of the paste is water-insoluble in the final solidified state, and the Young's modulus Y _R of the resin film is 0.15 to 0.01.
Kg/mm ² and Young's modulus of elastic polymers
It is a water-based glue made of a flexible resin that does not exceed _YP . The main material of the adhesive is, for example, a urethane resin or an acrylic ester copolymer. The adhesive can be used as is or by adding a crosslinking agent to the adhesive to form a film.
The Young's modulus _YR of the glue measured with that film is 0.15
-0.01Kg/ ^mm2 , and adhesives with a large Young's modulus of 0.15Kg/ ^mm2 or more will not only make the printing surface hard and give a feeling different from other parts, but also cause the printing surface to become hard. It has poor bending resistance and the printed surface floats away from the substrate, which is undesirable. On the other hand, a sizing agent with a small Young's modulus of less than 0.01 Kg/mm ² not only deteriorates the adhesion of the colorant but also deteriorates the friction fastness.
The colorant added to the paste is at least one colorant selected from water-insoluble or poorly water-soluble inorganic pigments, organic pigments, and dyes.

The aqueous composition for textile printing is prepared by adding an aqueous thickening agent, a coloring agent, and, if necessary, an organic solvent such as mineral turpentine, a crosslinking agent, a surfactant, and the like. and,
The prepared textile-like aqueous composition is applied to the raised surface of the fiber using a commonly used printing machine, such as a rotary screen printing machine, a roller printing machine, a flat automatic screen printing machine, a traveling screen printing machine, a hand screen printing machine, etc. Print. 100 after printing
Steaming or heat treatment is performed at any temperature in the range of ~150°C to fix the colorant and napped fibers with the main resin of the sizing agent. After that, the raised surface other than the printed surface is smoothed by brushing or light buffing with sandpaper, and the raised surface of the fibers, which has been damaged by printing etc., is finished, and the printed smooth surface is improved. A clearer boundary is created,
The effect of enhancing the three-dimensional effect becomes greater.

〔Example〕

Next, embodiments of the present invention will be specifically described with reference to Examples. In addition, unless otherwise specified, parts and percentages are by weight.

Example 1 A mixed polyurethane mixture of polyester polyurethane and polyethylene ether polyurethane (polyurethane at 20°C The surface of the substrate obtained by impregnating the film's Young's modulus of 1.94 Kg/mm ² ) into the porous structure was buffed to obtain a suede-like fiber sheet having a fiber nap layer formed from one end of the nonwoven fibers. . This suede-like fiber sheet was first dyed dark blue using a dyeing method using a metal complex dye, dried, and then printed using the following printing method.

Aqueous composition for textile printing Seika Paste AP-1 (manufactured by Dainichiseika Kagyo Co., Ltd., trade name) 45% Mineral turpentine 36% Blue organic pigment 4% Emafix (crosslinking agent) (manufactured by Dainichiseika Kagyo Co., Ltd., Product name)
3% water 12% (However, the main material of the sizing agent is an acrylic ester copolymer, and the Young's modulus of the copolymer film at 20°C is 0.08 Kg/mm ² ) The above printing composition was mixed using a rotary screen printing machine. Print at a pressure of 1.0Kg/cm ² and a temperature of 130℃.
It was heat-treated for 3 minutes. Thereafter, the raised surface was brushed to obtain a smoothed printed fiber sheet. The resulting prints showed not only the outline of the pattern but also the thin lines printed clearly and had excellent three-dimensional color impression. Furthermore, the friction hardness was excellent with grade 4 or higher.

For comparison, a printing composition in which the sizing agent was a polyvinyl alcohol-based resin and the coloring agent was a metal complex salt dye was printed on the raised surface of the suede-like fiber sheet of Example 1. Stamping, steaming,
The hair was washed with water, dried, and then the raised side was brushed. What is obtained is not only the outline of the pattern, but also the outline of the pattern.
Not only were the fine lines unclear, but the printed area had a slightly rough feel to the touch. Furthermore, the friction wall waxiness was as low as 2nd to 3rd class.

Example 2 The suede-like fiber sheet of Example 1 was first dyed dark brown using a dyeing method using a metal complex dye, dried, and then dyed with a polyurethane paste (Young's modulus of polyurethane dry coating: 0.13 Kg/mm ² ) was mixed with a reddish-brown organic pigment and printed using a rotary screen printing machine at a temperature of 130°C.
Heat treatment was performed at ℃ for 3 minutes. Thereafter, the raised surface was brushed to obtain a smoothed printed fiber sheet.
The product obtained had a clear print of not only the outline of the pattern but also fine lines, excellent three-dimensional color impression, and excellent abrasion resistance with a friction fastness level of grade 4 or higher.

〔Effect of the invention〕

The napped fiber sheet printed according to the present invention has clear outlines in the printed and non-printed areas, has a three-dimensional color appearance, and has excellent friction fastness in the printed area.
Furthermore, a product with a good texture of the napped fiber sheet can be obtained.

Claims (1)

[Scope of Claims] 1. A fiber raised surface formed by the fiber ends of the constituent fibers on at least one surface of a substrate formed by containing an elastic polymer in a fiber structure mainly composed of fine fibers and/or bundles thereof. When coloring using the textile printing method,
The main material of the printing paste is water-insoluble in the final solidified state, and the film obtained by forming the printing paste has a Young's modulus Y _R in the range of 0.15 to 0.01 Kg/mm ² and is elastic. a water-based sizing agent and a water-insoluble or poorly water-soluble coloring agent that does not exceed the Young's modulus of the polymer Y _P ;
A napped fiber having fine napped fibers, characterized in that an aqueous composition to which a crosslinking agent, an organic solvent, and a surfactant are added as necessary is applied to the napped surface to form a printed colored surface that is fixed together with the napped fibers. Sheet printing method. 2. The printing method according to claim 1, wherein the fine fibers have an average single fineness in the range of 0.05 to 0.0001 denier. 3. The printing method according to claim 1, wherein the main resin of the sizing agent is an acrylic ester copolymer.