KR910009702B1 - Fleat-sheet - Google Patents

Abstract

A non-wooven fabric sheet is produced by heat-bonding a polypropylene film (2) on the polypropylene nonwooven fabric (1) with a polyethylene resin solution (3). The polypropylene film (2) is pref. biaxially-drawn film, and has a photogravure printing layer (7) in the inner surface. The film (2) and the fabric (1) are bonded by the heat- squeezing roller, and then cooled by the cooling roller. The fabric sheet has a good water-proof property, tensile strength and an exquisite printing effect.

Description

Nonwoven Sheet

1 is a cutaway perspective view of the nonwoven sheet of the present invention.

2 is a partially enlarged cross-sectional view of the nonwoven sheet of the present invention.

Figure 3 is a diagram illustrating the bonding process of the nonwoven sheet of the present invention.

* Explanation of symbols for the main parts of the drawings

1: polypropylene nonwoven fabric 2: polypropylene film

3: polyethylene resin solution 4: thermo-compression roller

5: polyethylene resin container 6: cooling roller

7: printed layer

The present invention relates to an inner printed nonwoven sheet suitable for a nonwoven surface as a film having a printing surface on its inner surface with at least one surface layer having a smooth surface.

More specifically, in order to bond a separate film having a flat surface to the surface of a polypropylene nonwoven fabric, polyethylene is liquefied into a flat shape on a film at high temperature and used as a bonding medium between the nonwoven fabric and the film. By sealing the non-woven fabric and the printing film is fused and integrally welded, as well as providing a high-quality non-woven sheet that has excellent lining and tensile strength and has a sophisticated printing effect, as well as lint-free surface friction.

Non-woven fabrics have relatively large particles of holes with good breathability and water repellency, and are widely used in bags, shopping bags, interior materials, medical, household goods, etc., but they are poor in printability and heat resistance, and especially because they use ultrafine fibers. Falls.

That is, as the finer the fiber, the smoother the surface is, but the tear strength is lowered.

Therefore, due to the material problem, the product using the nonwoven fabric itself is mainly used as a disposable product and the surface printing method is not good printability because the product development range is not wide.

Conventional nonwoven fabrics include polyethylene nonwoven fabrics and polypropylene nonwoven fabrics.

Among them, polyethylene nonwoven fabric has various nonwoven fabrics by numerous developments and can be dyed after dyeing. Therefore, the fabric color can be matched to product development. Therefore, the structural shape of the surface of nonwoven fabric is also considerable. Developed.

However, such a problem of the polyethylene nonwoven fabric is in printability.

In other words, the polyethylene nonwoven fabric may have a high temperature printing effect in printability, but has been surface printed and has difficulty in maintaining the color of the original ink itself due to absorption of the nonwoven fabric of the printing ink.

The polypropylene nonwoven fabric, known as another one, is cheap in terms of material and has a very small range of product development.

The reason is that it should be pre-dyed before producing the fabric, and since the color of the dye and the fabric are different from each other after processing, it takes a lot of time to develop the color first. will be.

Therefore, the conventional nonwoven fabric is mainly used as a disposable product rather than a luxury product because of the problem of poor printability and heat resistance, and the range of utilization is not wide.

In view of the problems of the conventional nonwoven fabric, the present invention devised a completely new inner printed nonwoven sheet and heat-sealed the polypropylene nonwoven fabric with a separate printed film having a smooth surface. The two materials with the characteristics of are mutually press-bonded in a substantially fused state to obtain a smooth nonwoven sheet. At least one surface layer is hardened by having a flat surface layer on the film, and is hard to be fluffed by surface friction, and has waterproof and tensile strength. It is an object of the present invention to provide a nonwoven sheet which is excellent in tear strength, has a variety of colors of the nonwoven sheet, and can be processed finely and precisely.

When explaining the embodiment of the present invention in detail as follows.

Polypropylene nonwoven fabric (1) used in the present invention and the polypropylene film (2) bonded thereto are used to purchase conventional fabrics distributed in the market, respectively, the polypropylene film (2) is biaxially in the longitudinal, transverse direction As a stretched film, it is a film excellent in mechanical properties, such as transparency, gloss, electrical insulation, gas permeability, and cold resistance.

Polyethylene, which is used as a heat-sealing medium of the two fabrics, has excellent extrusion processing characteristics under a wide range of processing conditions, and it is liquefied at an average roughness of about 25u and an appropriate processing temperature of 250 ° C-340 ° C.

In the present invention, the polypropylene film fabric and the nonwoven fabric fabric are gravure printed on the inner surface, respectively, are supplied to the lower thermal compression roller (4), and in the polyethylene resin container (5) installed between the two fabrics on the inner surface of each fabric. Sprinkle the polyethylene resin solution (3) to be applied, and the thermocompression roller (4) compresses both ends to heat seal integrally.

Therefore, the polypropylene nonwoven fabric and the polypropylene film are conveyed in a state of being integrally heat sealed by polyethylene resin liquid, which is a bonding medium, and cooled by the cooling roller 6 at the rear thereof, whereby the desired nonwoven sheet of the present invention can be obtained. will be.

In addition, in order to solve the surface printability problem of the basic nonwoven fabric, the polypropylene film is multiplied and finely printed on the inner surface of the corona treatment (uneven surface treatment for good printing) to have the printed layer 7 and When the polymer is polymerized to the nonwoven fabric, a nonwoven sheet having an inner printed surface of vivid color is produced.

The layer constituting the nonwoven sheet of the present invention has a three-layer structure as shown in the drawing, and when combined with the printed layer, a four-layer structure is formed.

When they are bonded together in a single body, the printability is improved by the combination of physical properties of each fabric, and it is also excellent in smooth surfaces, waterproofness, tensile and tear strength, and can be used as a high quality nonwoven sheet.

Table 1 shows the physical property standards of polypropylene film.

TABLE 1

Table 2 shows the results of polyethylene resin properties measured using compression test pieces.

TABLE 2

Table 3 shows the measurement results of the physical properties of the polypropylene long fiber nonwoven fabric.

TABLE 3

As shown in Table 1, Table 2, and Table 3 above, when the physical property standards of each constituent material before performing heat sealing can be seen that compared with the physical property standards of the present nonwoven sheet shown in Table 4 below.

This is a measurement result of the physical property standard of the nonwoven sheet of the present invention, which is repeated several times at the Korea Textile Technology Promotion Center (cottage) (KOTITI NO: A-11142).

TABLE 4

In Table 4, “A” is the result of polymerizing a polypropylene film thickness of 0.02 mm on a polypropylene nonwoven fabric of 80 g / m 2 with 20 μl of polyethylene, and “B” is a polypropylene film thickness of 0.03 mm on a polypropylene nonwoven fabric of 80 g / m 2 of polyethylene. This is the result of polymerization to 20 u.

The nonwoven sheet of the present invention is manufactured to have the physical property standards of Table 4, and because at least one surface is polymerized with a polypropylene film that is easy to print, it can not only produce a fine and silver printing effect but also reduce the quality and color change. It does not become fluff even on surface friction, and has excellent waterproofness, tensile strength, and tear strength, so that it can be widely used as an industrial or miscellaneous material.

Claims (1)

A nonwoven sheet comprising a polypropylene film having a gravure printing on the inner surface of a polypropylene nonwoven fabric, which is heat-sealed with a polyethylene resin solution so that the surface is integrated with a smooth layer.

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