KR19980073195A - Manufacturing method of polyester nonwoven printing machine paper - Google Patents

Abstract

The present invention is to prepare a non-woven fabric printing polyester, to produce a bubble by calendering a polyethylene terephthalate long fiber spunbond nonwoven fabric having a fineness of 0.5 to 2.0 denier, polyacrylic acid ester, After impregnating the mixed resin of silane crosslinked polyethylene, benzotriazole, inorganic filler, stilbene derivative, acrylic acid, and water, drying and curing, the surface of the bubble-filled bubble paper is then returned to the same conditions as above. Provided is a method for producing a polyester filament nonwoven printing bubble, characterized in that it is calendered, which has the effect of obtaining a nonwoven printing bubble paper having excellent printability, light resistance, paper feedability, and the like.

Description

Manufacturing method of polyester nonwoven printing machine paper

The present invention relates to a manufacturing method of printing paper bubble paper used for wallpaper, business cards, envelopes, wrapping paper, advertising paper, etc. In detail, the manufacturing method of a polyester non-woven fabric printing paper paper excellent in printability, water resistance, heat resistance, light resistance, form stability, paper feedability It is about.

Conventional paper printing paper has good printability, but it is made of weak cellulose, so it is easy to tear when it gets wet due to poor morphological stability, and it is easy to tear when external force is applied even when it is not wet. have. In addition, even in the case of short-fiber nonwoven printing paper, the sheet state is made of staples in which fibers are cut to a certain length, and thus the strength is weak. When manufacturing a lot of resins to reinforce the strength of the short-fiber nonwoven printing paper, the manufacturing cost is high. There is a disadvantage that up and the paper feedability is worse.

In the case of printing paper cloth processed only with acrylic or polyvinyl alcohol resin on general polyester long fiber nonwoven fabric having fineness exceeding 2 denier, it is difficult to remove irregularities on the surface of nonwoven fabric only by resin processing, and print sharpness is reduced due to large voids in processed nonwoven fabric. If there is friction after contact with water, the resin may drop out and the printed text or pictures may be less clear.

The present invention is to solve the above problems, and the polyethylene fine terephthalate long-fiber spunbond nonwoven fabric with fine fineness is calendered at a constant temperature and then mixed with resin, crosslinking agent, light-proofing agent, filler, fluorescent brightener, thickener, and water. The purpose of the present invention is to prepare a polyester non-woven printing paper fabric having excellent printability, water resistance, heat resistance, light resistance, shape stability, and feeding ability by impregnating the mixed resin material, followed by drying, curing, and calendering.

Hereinafter, the present invention will be described in detail. First, a spunweb is prepared by sucking and stretching a melt-spun polyester continuous filament by a conventional method, and then laminating it onto a moving net conveyor. At this time, the filament fineness of the spunweb should be 0.5 to 2.0 denier. The reason is that if the denier of the filament is thicker than necessary, the number of filaments at the same weight is smaller than that of the spun web where the denier is thin. This is because unevenness becomes difficult to remove, resulting in poor print clarity and a high coefficient of friction, which lowers the feedability, which is the supplyability of the spunweb for printing presses to the press, and reduces productivity. The fineness of the spunweb may be 0.5 denier or less, but current manufacturing technology has a problem that it is difficult to make 0.5 denier or less before the composite spinning is divided into filaments. In order to impart surface smoothness and compactness to the nonwoven fabric thus prepared, calendering is carried out. At this time, a temperature of 190 to 240 ° C. is suitable. If the calendering temperature is less than 190 ° C., surface smoothness and denseness may be deteriorated. Polyester may be embrittled by heat, and the strength may be lowered.

Even spunbonded non-woven fabrics with fineness of 0.5 to 2.0 denier, if not treated with special resin coatings containing various chemicals, are unsatisfactory in print sharpness, paper feed, light resistance, and water resistance due to the unevenness and general resin properties of the spunweb.

Therefore, as a resin component used as a main axis in the composition of the resin coating material used by this invention, polyacrylic acid ester resin is preferable and 30-40 weight% is added to the whole coating material. If the content exceeds 40% by weight, the viscosity may be so high that it may be difficult to process. If it is less than 30% by weight, it may be difficult to remove the unevenness of the spunweb.

The crosslinking agent and the inorganic filler used in the composition of the resin coating material of the present invention, when processed only the polyacrylic acid ester resin, the surface is too smooth, the spun web is slippery when feeding, causing workability during continuous printing and water resistance is poor, so the water after printing In the case of friction in this thin state, the printing state is poor, and the preferred inorganic fillers are silicon dioxide and aluminum oxide, and the crosslinking agent is silane crosslinked polyethylene. It is preferable to add 3.0 weight% and 0,8 to 1.0 weight%. If these are added below the reference value, excessive surface smoothness problems and water resistance problems may occur. If the reference value is added above, the surface friction coefficient may be too high, making it difficult to feed.

In the present invention, benzotriazole is preferred as a light inhibitor, and stilbene derivatives are used as fluorescent brighteners, respectively, in order to introduce a light and a brightening agent into a resin coating to improve the light resistance of a spunbond nonwoven printing paper. %, 1.5 to 3.5% by weight is preferably added. When these are added below the reference value, it may be difficult to improve the light resistance, and when it is added above the reference value, the light resistance may not increase any more, and the water resistance may be reduced by reducing the crosslinking of the silane crosslinked polyethylene, which is a crosslinking agent of the polyacrylic acid ester resin and the inorganic filler. .

In the present invention, when processing only with the resin coating material prepared as described above, the resin deposited on the spunweb is dried (Migration) during the drying and curing process, resulting in resin roughness due to non-uniform resin bonding in the spunweb to reduce the print sharpness And a thickener for increasing the viscosity of the resin formed for prevention of the spunweb by increasing the viscosity of the spunweb, thereby reducing the resin migration during the process. Preferably, the thickener is 1.0 to 2.5% by weight of acrylic acid. It is preferable to add. Addition of more than 2.5% by weight may result in excessive viscosity, making processing difficult, and addition of less than 1.0% by weight may reduce the thickening effect.

The resin coating material prepared in such a solution was stirred and mixed with an impeller, and then impregnated in a polyester spunbond nonwoven fabric, and then adhered to 55 to 70% by weight on a dry solid basis, followed by drying and curing at 180 to 210 ° C, and again before the resin processing and By rendering under the same conditions, it is possible to produce a polyester nonwoven printing paper having excellent printability, water resistance, heat resistance, light resistance, form stability, and paper feedability. Hereinafter, the present invention will be described in more detail with reference to Examples, but the present invention is not limited by Examples.

[Examples 1-3]

A weight of 50 g / m 2, thickness of 0.15 mm, and a single yarn fineness calendered at 220 ° C. were 1.0 denier, and a resin spun bond having a melting point of 257 ° C. was impregnated with the resin composition of Table 1, followed by drying and curing at 200 ° C. for 3 minutes. Then it was calendered again at 220 ° C.

Comparative Example 1

The polyester spunbond having a weight of 50 g / m 2 and a thickness of 0.15 mm, calendered at 180 ° C., 1.0 denier, and a melting point of 257 ° C. was impregnated with the resin composition shown in Table 1, followed by drying and curing at 200 ° C. for 3 minutes. It was.

Comparative Example 2

Weight 50g / m 2, thickness 0.15mm, single yarn fineness calendered at 220 ° C, 4.0 denier, saturation point, polyester spunbond impregnated with resin composition of the following Table 1, dried and cured at 200 ° C for 3 minutes Then it was calendered again at 220 ° C.

Comparative Example 3

The resin composition was not impregnated with a polyester spunbond having a weight of 50 g / m 2 and a thickness of 0.15 mm and a single yarn fineness calendered at 220 ° C. of 4.0 denier and a melting point of 257 ° C.

Comparative Examples 4 to 6

The same treatment as in Example 1, but the composition of the additive composition was changed as shown in Table 1.

TABLE 1

The physical properties of the nonwoven fabric for printing bubbles produced by the above Examples and Comparative Examples were measured and the results are shown in Table 2 below.

TABLE 2

Note) The properties of tensile strength, elongation, and shrinkage of laundry are longitudinal and widthwise properties.

The measuring method of the physical property is as follows.

* Tensile strength and elongation: Strip method (JIS L-1096)

* Washing shrinkage rate: JIS L-0217

* Feeding status: Judging by the status of printing paper (printed paper slip, wrinkle, feeding speed delay, etc.) when printing .-- ○: Good, △: Normal, ×: Bad

* Light fastness: JIS L-0842 (xenon method)

* Size: Mercury method

* Print Sharpness: Determined by checking the printed line or type after printing

-○: Good, △: Normal, ×: Poor

* Back Standard Horseshoe: Dial gauge method

Claims (4)

In preparing a polyester nonwoven fabric printing bubble, polyethylene terephthalate long fiber spunbond nonwoven fabric having a fineness of 0.5 to 2.0 denier is calendered to prepare a bubble paper, and polyacrylic acid ester and silane crosslinked polyethylene are applied to the inside and the surface of the bubble paper. , Impregnated with benzotriazole, inorganic filler, stilbene derivative, acrylic acid and water, followed by drying and curing, followed by calendering the surface of the bubble-filled bubble paper again under the same conditions. Method for producing a polyester filament nonwoven printing foam, characterized in that. The method of claim 1, wherein said calendaring is performed at a temperature of 190 to 240 ℃. The method of claim 1, wherein the inorganic filler is characterized in that any one or two or more selected from silicon dioxide, aluminum oxide, calcium dioxide, sodium dioxide is mixed. According to claim 1, wherein the mixed resin is 30 to 40% by weight of polyacrylic acid ester, 0.8 to 1.8% by weight of silane crosslinked polyethylene, 0.3 to 1.2% by weight of benzotriazole, 1.0 to 3.0% by weight of inorganic filler, stilbene derivative 1.5 -3.5 wt%, acrylic acid 1.0-2.5 wt%, and water 48.0-65.4 wt%.