KR20000073822A - Coated non-woven fabric for ink jet printing - Google Patents

Abstract

PURPOSE: Provided is a method for producing a coated nonwoven material for inkjet printing which has excellent water resistance and light resistance so it is blast-spinning non-directional polyethylene fiber having excellent durability and high density to form. CONSTITUTION: The coated nonwoven material is prepared by: mixing resin selected from the group consisting of polyvinyl alcohol, acrylic resin, polyvinyl acetate and latex with pigment selected from the group consisting of silica, calcium carbonate, clay, talc, titanium dioxide and plastic pigment in a weight ratio of pigment to resin of about 10:2-8 to make under-coating liquid; under-coating in under-coating liquid of quantity being 3.0-10.0g/m¬2 by using one method selected from the group consisting of blade, bar coater, roll coater and air knife coater; drying coated layer by using hot wind or cylinder dryer; mixing pigment selected from the group consisting of silica, calcium carbonate and clay with adhesive selected from the group consisting of polyvinyl alcohol, acrylic resin, polyvinyl acetate and latex in a composite ratio of pigment to adhesive of 10:2-9 to make top-coating liquid; top-coating in top-coating liquid of quantity being 10.0-35.0g/m¬2 by using one method selected from the group consisting of blade coater, roll coater and air knife coater; and then drying coated layer by using hot wind and cylinder dryer. In case of necessity, non-ionic defoamer, ink fixative, dispersing agent and water proof agent. Water proof agent is selected from the group consisting of ammonium zirconium carbonate, ammonium zirconium acrylate, glyoxal and epoxy type resin.

Description

Coated non-woven fabric for ink jet printing

Materials used in advertisements using inkjet printing media include cloth, paper, inkjet film, back light film, and polyester film. Among them, the inkjet film (see Korean Patent Publication No. 96-22895) has good printing characteristics, but the coating layer and the printing layer are damaged when rain is used when used outdoors due to lack of water resistance of the coating layer. Paper-based inkjet paper (see Korean Patent Publication No. 92-869) is also not suitable for outdoor use due to lack of water resistance and strength of paper and coating layer.

In addition, there is a printing nonwoven fabric (refer to Korean Patent Publication No. 91-15741) in which a resin and a pigment are coated on a nonwoven fabric, but ink absorption speed of clay and calcium carbonate used as a pigment when printing it by an inkjet method instead of offset printing. Because of low and low absorption amount there is a problem that the print quality is reduced due to the smear of the inkjet image.

In order to solve the problems of the conventional advertising materials in the present invention, instead of paper or film as a coating substrate in the waterproof and durable excellent non-directional high-density polyethylene fiber that is used as a material for outdoor advertising and banners formed by explosion-spinning Nonwoven fabric was used. In addition, to improve the absorption speed and print quality of inkjet ink, silica was used as coating pigment with large oil absorption volume and porous and fast ink absorption.Ammonium zirconium carbonate, ammonium zirconium acrylate, glyoxal, epoxy as water-resistant agent in coating liquid composition One of the resins was added to greatly improve outdoor storage. Therefore, the present invention is a pigment coating non-woven fabric for inkjet printing and its coating composition that can be used outdoors because the print image is clear and there is no damage to the coating layer due to rain or wind when printing using a real-time inkjet printer. It is for the purpose of manufacturing.

The nonwoven fabric used as the substrate in the present invention is a special fiber formed by heat and pressure by exploding the non-directional high-density polyethylene fiber having a thickness of 0.5 to 1.0 μm without a binder or filler. Therefore, it is tough and light, has excellent elasticity, does not generate fine dust, and has strong characteristics against water or chemicals.

Undercoating is performed on the substrate, and polyvinyl alcohol, acrylic resin, polyvinylacetate, latex, etc. may be used as the resin used for the undercoating, and silica, calcium carbonate, clay, talc may be used as the pigment. , Titanium dioxide, plastic pigment, and the like can be used. Thus, it is preferable that the composition ratio of a coating liquid is about 10: 2-8 weight ratio of a pigment to resin.

An appropriate amount of nonionic antifoaming agent, ink fixing agent, dispersant, water resistant agent, etc. can be added to the mixed liquid comprised in this way as needed. As the water resistant agent, one of ammonium zirconium carbonate, ammonium zirconium acrylate, glyoxal, and an epoxy resin may be used.

The undercoat coating method may use blades, air knives, bar coaters, roll coats, and the like, which are commonly used in the papermaking field, but most preferably, the air knife can minimize the difference in the thickness of the coating layer produced by the unevenness of the fabric. Coater is suitable.

In the case of undercoating, the amount of the coating liquid to be applied is preferably 3.0 to 10.0 g / m 2, and the drying of the coating layer may use hot air or a cylinder drier.

As a pigment used as a top coating coating composition, one having a oil absorption of 100 to 300 ml / 100 mg, one of calcium carbonate and clay is used. As the adhesive used for the top coating, polyvinyl alcohol, acrylic resin, polyvinylacetate, latex, etc. may be used, and an appropriate composition ratio of the pigment to the adhesive is about 10: 2-9.

5-10 parts by weight of ammonium zirconium carbonate, glyoxal, or epoxy resin, water-retaining improver, ink fixing agent, and antifoaming agent may be mixed to 0.5 to 5 parts by weight with respect to the dry weight part of the pigment.

After the under coating, a plurality of top coating layers are laminated on the under coating layer. The top coating method may be a blade coater, a load coater, an air knife coater, a roll coater, etc., and an appropriate coating amount is preferably 10.0 to 35.0 g / m 2. . Drying of a coating layer uses hot air and cylinder dryer together.

Hereinafter, preferred embodiments of the present invention are described.

(Example 1)

The fabric is made of a high density polyethylene nonwoven fabric, and the undercoating solution composition is 80 to 90 parts by weight of modified polyvinyl alcohol and acrylic resin, and 3 to 20 of ammonium zirconium carbonate, ammonium zirconium acrylate, glyoxal or epoxy resin as a water resistant agent. A weight part was added and a small amount of nonionic antifoaming agent and water were added to prepare a coating composition for undercoat. As a top coating pigment, silica and calcium carbonate and clay having oil absorption of 100 to 300 ml / 100 mg are mixed and used, and the pigment and adhesive addition ratio is 10: 2 to 9, and the amount of the water-resistant agent is added to the total amount of the pigment. 5 to 20 parts by weight, water-retaining modifier, ink fixing agent, and antifoaming agent were mixed with 0.5 to 5 parts by weight to prepare a top coating layer coating liquid composition. Undercoat coating amount was 3.0-10.0 g / m <2>, top coating amount was 10.0-35.0 g / m <2>, multiple layers were applied, and it dried with hot air, and produced the pigment coating nonwoven fabric.

(Example 2)

Using the same fabric as in Example 1, the coating composition for the undercoat is modified polyvinyl alcohol and acrylic resin 80 to 95 parts by weight, ammonium zirconium carbonate, ammonium zirconium acrylate, glyoxal, epoxy resin One to 3 to 10 parts by weight, 3 to 10 parts by weight of clay having a degree of whiteness of 90% or more was added, and a small amount of nonionic antifoaming agent and water were added to prepare a coating composition for undercoating. The top coating layer coating composition was prepared in the same manner as in Example 1, and the coating amount and manufacturing method of the undercoat and the top coating layer were prepared in the same manner as in Example 1 to prepare a pigment coating nonwoven fabric.

(Example 3)

The same fabric as in Example 1 was used, and the undercoating composition used a plastic pigment having an average particle diameter of 0.5 to 1.0 μm as a pigment, and a polyvinyl alcohol and an acrylic resin mixed solution as an adhesive, 20 to 80 wt. By addition, the coating composition for undercoat was prepared. As a top coating pigment, silica having an oil absorption of 100 to 300 ml / 100 mg was used, and the adhesive was mixed so as to be 20 to 90 parts by weight relative to the pigment. If necessary, 5 to 20 parts by weight of one of ammonium zirconium carbonate, glyoxal, and an epoxy resin, a water-retaining improver, an ink fixing agent, and an antifoaming agent were added as a water-resistant agent to prepare a top coating layer coating liquid composition. The coating amount and manufacturing method of the undercoat and topcoat layer were prepared in the same manner as in Example 1 to prepare a pigment coated nonwoven fabric.

The characteristics of the pigment coating nonwoven fabric for inkjet obtained in Examples 1, 2 and 3 were measured by the following method and the results are shown in Table 1 below.

Quality Evaluation Items and Methods

1) To evaluate printing uniformity, ink absorbency and image sharpness, inkjet printing was printed on a Camjet printer manufactured by Roland, Japan, and image sharpness was evaluated by a color density meter (RD-914).

2) The light resistance was measured after exposure to UV tester to measure the change of color concentration and pigment drop in coating layer. The water resistance was immersed in tap water at 20 ℃ for more than 1 month to evaluate the water resistance of coating layer.

Table 1. Quality Evaluation Items Note) ○: Excellent, △: Good, ×: Poor

Test Items Example 1 Example 2 Example 3 Printing uniformity △ × ○ Ink absorption △ △ ○ Image clarity ○ ○ ○ Water resistance ○ ○ ○ Light-resistant ○ ○ ○

The present invention uses a nonwoven fabric formed by exploding and spinning high-density polyethylene fibers having excellent durability as a substrate for coating, and porous silica having high ink absorption speed is used to improve the clarity of a printed image on the substrate, and in particular, the water resistance of the coating layer. The purpose of the present invention is to produce an inkjet printing advertisement material that can be used outdoors. The advertisement produced by the present invention has a low cost because it does not need to apply a separate protective layer after inkjet printing in order to improve durability, such as water resistance, light resistance, etc., because the printed image is clear and has excellent durability such as water resistance. As it has a feature that can be easily produced advertising.

Claims (2)

As a pigment, a plastic pigment having an average particle diameter of 0.5 to 1.0 µm is used, and 20 to 80 parts by weight of a modified polyvinyl alcohol resin and an acrylic resin mixed solution relative to the pigment, and, if necessary, ammonium zirconium carbonate and ammonium zirconium 3 to 20 parts by weight of one of acrylate, glyoxal, and epoxy resin are mixed, and the amount of coating on the nonwoven fabric prepared by using polyethylene fiber as the coating material composition for under coating prepared by mixing a small amount of nonionic antifoaming agent. Pigment coating non-woven fabric for inkjet printing, which is undercoated using any one of a blade coater, a rod coater, an air knife coater and a roll coater so that it is 3.0 to 10.0 g / m 2. On the undercoat layer, a pigment having oil absorption of 100 to 300 ml / 100 mg is mixed as an pigment, and an acrylic resin and a polyvinyl alcohol resin are mixed so as to be 20 to 90 parts by weight relative to the pigment as an adhesive, and an ammonium zirconium carbonate, 5-20 parts by weight of one of ammonium zirconium acrylate, glyoxal, and epoxy resin, a water-retaining improver, an ink fixing agent, and an antifoaming agent undercoating the coating composition for top coating prepared by mixing 0.5-5 parts by weight. Pigment coating nonwoven fabric for inkjet printing, which is top-coated in multiple layers using any one of a blade coater, a load coater, an air knife coater and a roll coater so as to have a coating amount of 10.0 to 30.0 g / m 2 on the coating layer.