JPH091712A - Waterproof moisture-permeable sheet for house wrap and method for producing the same - Google Patents

Abstract

(57) [Summary] [Objective] Waterproof moisture-permeable sheet for house wrap that satisfies both waterproofness and moisture permeability and is convenient for cutting and size adjustment, and its manufacturing method [Composition] Heat formed by embossing A crimp-embossed polyester / spunbond non-woven fabric and a polyethylene film that is crimped onto the thermocompression-bonded embossed polyester / spunbond non-woven fabric and is embossed so that cracks having waterproofness and moisture permeability are generated. Waterproof breathable sheet for house wrap. Further, a cross-cut pattern convenient for cutting and matching the dimensions is printed between the thermocompression-bonded embossed polyester / spunbond nonwoven fabric and the polyethylene film.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a waterproof moisture-permeable sheet for a house wrap used for preventing dew condensation on the wall of a house and a method for producing the same. The waterproof moisture-permeable sheet for house wraps is to be adhered to the inner wall material surface side of the ventilation layer provided between the outer wall material and the inner wall material of the house without a gap. The waterproof moisture-permeable sheet for house wraps prevents wind and rainwater from entering from the outer wall side and allows moisture on the inner wall side to escape to the outside to prevent dew condensation. In addition, since the waterproof moisture-permeable sheet for house wrap is waterproof and moisture-permeable, it is possible to prevent deterioration of the performance of the heat insulating material and improve the durability of structural materials such as columns, bases, and inner wall materials. is there.

[0002]

2. Description of the Related Art In recent years, there has been a demand for improvement in habitability of houses. In particular, a wall for a house has come to be required to satisfy all conditions such as heat insulation, ventilation, waterproofing, and moisture permeability. However, one member cannot satisfy all of these conditions. Therefore, the house wall is composed of an outer wall, a heat insulating material, a ventilation layer, a waterproof and moisture permeable sheet, and an inner wall.

For example, a moisture permeable building material sheet described in Japanese Patent Laid-Open No. 223249/1988 is composed of a laminate of a stretched polyolefin film containing a filler and a polyolefin tape woven fabric, and has a moisture permeability and an air permeability. Is improved. Further, the moisture-permeable / waterproof sheet described in JP-A-7-11716 is composed of nonwoven fabrics having different fiber densities.

[0004]

However, the waterproof / moisture permeable sheets described in the above publications are expensive because they try to satisfy the contradictory performances of waterproofness and moisture permeability with a special material. Even if a waterproof and moisture-permeable sheet with good performance is developed, the person who installs it will cut it by mistake,
If a gap is created, there is a problem that the effect cannot be exhibited. That is, the waterproof and moisture permeable sheet needs to be attached to the openings and corners of doors, windows, etc. without any gaps in order to prevent moisture and humidity. Therefore, craftsmen spend time and effort on cutting and dimensioning the waterproof / moisture permeable sheet. In addition, cutting and dimension matching that does not generate such a gap require an experienced professional craftsman.

The present invention has been made to solve the above-mentioned problems, and it is based on an existing thermo-compression-embossed polyester.
An object of the present invention is to provide a waterproof moisture-permeable sheet for a house wrap that satisfies both waterproofness and moisture permeability by using a spunbond nonwoven fabric and a polyethylene film, and a method for producing the same. It is an object of the present invention to provide a waterproof moisture-permeable sheet for a house wrap, which is convenient for cutting and dimensioning the waterproof moisture-permeable sheet for a house wrap, and a method for producing the same.

[0006]

[Means for Solving the Problems]

(First Invention) In order to achieve the above-mentioned object, the waterproof and moisture-permeable sheet for house wraps of the present invention is a polyester spunbond in which an embossment 12 is preliminarily formed by thermocompression bonding and a checkerboard pattern is printed on one surface thereof. A non-woven fabric 11 and a polyethylene film 21 in which an emboss 22 is formed so that cracks having waterproofness and moisture permeability are generated on a cross-pattern printed surface of the polyester / spunbonded non-woven fabric 11. Characterize.

(Second Invention) The cross-cut pattern 42 printed on the polyester / spunbond nonwoven fabric 11 in the waterproof and moisture-permeable sheet for house wraps of the present invention has a cross-cut pattern 42 and a plurality of line types 43 whose cutting dimensions are known. It is characterized in that it is composed of.

(Third Invention) The polyethylene film 21 in the waterproof and moisture-permeable sheet for house wraps of the present invention is characterized in that a weather resistance improver and / or an ultraviolet absorber is added.

(Fourth Invention) In the method for manufacturing a waterproof and moisture-permeable sheet for house wraps according to the present invention, embossing 1 is performed in advance by thermocompression bonding.
2. A step of printing a cross-cut pattern 42 on one side of the polyester / spunbond nonwoven fabric 11 on which 2 is formed, and a step of extruding and laminating a polyethylene film 21 on the printed surface of the cross-cut pattern of the polyester / spunbond nonwoven fabric 11. And a step of molding the embossing 22 so that the polyethylene film 21 is cracked to a degree having waterproofness and moisture permeability.

[0010]

[Operation]

(First Invention) In a polyester / spunbond nonwoven fabric having a cross-cut pattern printed on one side, a diamond-shaped emboss is formed on at least one entire surface by thermocompression bonding, for example.
Pre-molded precisely. In addition, a large number of embosses are formed on the entire surface of the polyethylene film so that cracks having a degree of waterproofness and moisture permeability are generated.
And the polyethylene film is
It is extruded and laminated on the cross-cut pattern side printed on the spunbond nonwoven fabric. As described above, by appropriately selecting the size and depth of the embosses formed on the polyester / spunbond nonwoven fabric and the polyethylene film, both the waterproof property and the moisture permeable property can be improved at the same time. The cross-cut pattern printed between the polyester / spunbond nonwoven fabric and the polyethylene film can be easily cut and sized by even an inexperienced craftsman. In addition, since the cross-cut pattern is printed between the polyester / spunbond nonwoven fabric and the polyethylene film, it does not require the use of a dedicated ink despite the use of embossed nonwoven fabric. Even if you print with cheap ink that is usually used, it will not drop.

(Second Invention) Since the cross-cut pattern printed on the polyester / spunbonded nonwoven fabric is composed of an overlay line and a plurality of line types whose cutting dimensions are known, it can be quickly applied at the application site. The work can be done at once and the error of cutting size is eliminated.

(Third invention) Since the polyethylene film is added with a weather resistance improver and / or an ultraviolet absorber, the polyethylene film has a long rest during construction and does not deteriorate even if exposed to sunlight for a long time. Does not impair waterproofness and breathability.

(Fourth Invention) The polyester / spunbond nonwoven fabric having the embossed molding and the polyethylene film are thermocompression-bonded in advance only by extrusion-laminating, so that it is suitable for mass production and inexpensive. Even if a cross-cut pattern is printed on one surface of the embossed polyester spunbonded non-woven fabric, printing does not drop because the printing surface side is thermocompression bonded with a polyethylene film. In addition, since a continuous process of embossing, printing, extrusion laminating, and embossing can be performed, an inexpensive waterproof moisture-permeable sheet for house wrap can be produced. Furthermore, since the polyethylene film is embossed so as to generate cracks, it is possible to simultaneously satisfy both waterproofness and moisture permeability.

[0014]

[Examples] FIG. 1 is a diagram for explaining a polyester / spunbond nonwoven fabric used in this example. FIG.
[FIG. 3] is a diagram for explaining a polyethylene film used in this example. FIG. 3 is a diagram for explaining the waterproof moisture-permeable sheet for house wraps of this embodiment. In FIG. 1, the base material of the waterproof and moisture-permeable sheet for house wraps of this example is a thermocompression-bonded embossed polyester / spunbond nonwoven fabric (for example, trade name:
Axter, product number: G2060-1, 60 g / m ² , manufactured by Toray) 11 was used. The polyester / spunbond nonwoven fabric 11 usable in the present invention includes, for example, 5
It is preferably 0 g / m ² to 80 g / m ² . The thermocompression-bonding emboss can be formed, for example, by passing it through a heating embossing roll having a diamond-shaped convex portion having a size of about 1 mm.

On the thermo-compression-bonded embossed polyester / spunbonded nonwoven fabric 11, a checkerboard pattern described later is printed with the printing ink 31. Since the surface of the polyester / spunbonded nonwoven fabric 11 is highly uneven due to the fibers of the nonwoven fabric and the embossed 12 in a cross-cut pattern, it is easy to peel off on the outer surface. However, in the present embodiment, since the polyethylene film 21 is covered after printing is performed on the surface of the polyester / spunbonded nonwoven fabric 11, the printing may be lost even if the general-purpose inexpensive printing ink 31 is used. There is no.

In FIG. 2, the polyethylene film 21
Is selected from ordinary low density polyethylene, linear low density polyethylene, medium density polyethylene, etc., and its thickness is
10 μm to 30 μm, especially 12 μm to 16 μm
m is preferred. Further, an ultraviolet absorber and / or a weather resistance improver is added to the raw material of the polyethylene film 21 if necessary. Examples of such an ultraviolet absorber include benzophenone-based (for example, trade name: Seesorb 102, manufactured by Cypro Kasei), benzotriazole-based (for example, trade name: Tinuvin 326, manufactured by Ciba Geigy), etc. As the agent, a hindered amine light stabilizer (for example, trade name: LS-770, manufactured by Ciba Geigy) can be used. The polyethylene film 21 (thickness: 13 μm was formed on the cross-printed surface of the thermocompression-bonded embossed polyester / spunbonded nonwoven fabric 11.
m) is extruded and laminated.

Thereafter, the same embossing 22 as described above was formed on the surface of the polyethylene film 21 side. The shape of the embossing 22 is smaller than that of the polyester / spunbonded nonwoven fabric 11, and the polyethylene film 21
If the thickness is 13 μm, the depth is 2 μm to 10 μm,
It is preferably 3 μm to 6 μm. That is, it was found that the depth of the embossing 22 formed on the polyethylene film 21 should be slightly deeper than half the thickness of the polyethylene film 21. The embossing 22 formed on the polyethylene film 21 is usually performed at an embossing roll temperature of 70 ° C. to 100 ° C., but in this embodiment, it is performed at 80 ° C. After molding, when viewed with a microscope, extremely small cracks occur and the water vapor transmission rate is 1000 g / m.
² · 24h: measurement of (JIS Z0208 B method) was obtained. It has been found that these very small cracks are of a size that is convenient for permeating only moisture without permeating moisture. In addition, adding an ultraviolet absorber and / or a weather resistance improver to the polyethylene film 21 makes it possible to maintain the above-mentioned waterproofness and moisture permeability even if the time of being exposed to sunlight for a long period of time during construction is prolonged. Does not affect the performance of.

FIG. 4 is a diagram for explaining the cross-cut pattern printed on the polyester / spunbond nonwoven fabric in this embodiment. In FIG. 4, a cross-cut pattern 42 composed of, for example, four types of lines is drawn on the polyester / spunbond nonwoven fabric. The thick solid line 43 is, for example,
It has a thickness of about 0.5 mm to 2 mm and is 1 from both ends.
It is provided on the inner side of 00 mm and indicates that this part is a region for overlapping each other. Dotted lines 44 to 46
Has a thickness of, for example, about 0.3 mm to 2 mm, which are different from each other, so that the length of the waterproof moisture-permeable sheet 41 for house wrap can be known from the position of the thickness of the dotted line. For example, the dotted line 44 is provided every 100 mm in the vertical direction and the horizontal direction. Dotted lines 45 and 46 are provided every 1000 mm in the vertical direction,
It appears alternately every 500 mm.

The waterproof moisture-permeable sheet 41 for house wrap as described above facilitates cutting and size adjustment of openings such as windows and doors even for a craftsman who does not have specialized training at a work site. be able to. Further, since the grid pattern 42 has a divisible number and the type of the line is changed, for example, 100 mm, 500 mm, and 1000 mm, the craftsman can perform the correct cutting without measuring the size.

FIG. 5 is a thermocompression-bonded polyester.
It is a conceptual diagram for demonstrating the process at the time of carrying out printing on a spun bond nonwoven fabric and extruding and laminating a polyethylene film. In FIG. 5, the thermocompression-bonded embossed polyester / spunbonded nonwoven fabric 11 is assumed to be a commercially available product preliminarily embossed thereon. The thermocompression-bonded polyester / spunbond nonwoven fabric 11
The cross-cut pattern 42 is printed while passing between the drive roller 51 and the transfer roller 52 onto which the printing ink of the cross-cut pattern 42 shown in FIG. 4 has been transferred. Next, the heat-melted polyethylene film 21 is extruded from the T die 53, which is a mold for extruding polyethylene, and is laminated on the polyester / spunbond nonwoven fabric 11.

Thereafter, when the polyester / spunbonded nonwoven fabric 11 on which the cross-cut pattern 42 is printed and the polyethylene film 21 pass between the pressure roller 54 and the cooling roller 55, the heated polyethylene is used. The heat and the pressure of the film 21 cause the two to be appropriately welded to be laminated. Further, the laminated sheet is cooled by the cooling roller 55 and then pulled out by the guide roller 56. The embossing 22 on the polyethylene film 21 is formed by a driving roller (not shown) and a pressure roller on which an embossed pattern is formed.

Although the embodiments of the present invention have been described in detail above, the present invention is not limited to the above embodiments. And
Various design changes can be made without departing from the invention as set forth in the appended claims. For example, it goes without saying that the embossed pattern may have a shape other than a rhombus, or its depth and size can be arbitrarily changed. Further, the non-woven fabric and the polyethylene film may be optionally replaced with other commercially available members.

[0023]

According to the present invention, waterproofness and moisture permeability are improved by the combination of thermocompression-bonded embossed polyester / spunbond nonwoven fabric and polyethylene film, and the depth of embossing formed on the polyethylene film. In particular, the present invention exerts a great effect when it is used as a house wrap for walls. According to the present invention, an inexpensive printing ink can be used by printing a line between the thermocompression-bonded embossed polyester / spunbond nonwoven fabric and the polyethylene film to facilitate a seam or cutting. At the same time, it is difficult to print. According to the present invention, since a cross-cut pattern having different line thicknesses is provided inside the waterproof moisture-permeable sheet for house wraps, it is easy to match the shape and dimensions of the openings and corners of the wall, and the cutting can be facilitated. In addition, since the waterproof breathable sheet for house wrap has the above-mentioned cross-cut pattern, it is possible to efficiently reduce the attachment time of the waterproof breathable sheet for house wrap, and it is reliable without necessarily using a professional craftsman. There is a certain construction.

[Brief description of the drawings]

FIG. 1 is a diagram for explaining a polyester / spunbond nonwoven fabric used in this example.

FIG. 2 is a diagram for explaining a polyethylene film used in this example.

FIG. 3 is a diagram for explaining the waterproof moisture-permeable sheet for house wraps of this example.

FIG. 4 is a diagram for explaining a cross-cut pattern printed on a polyester / spunbond nonwoven fabric in this example.

FIG. 5 is a conceptual diagram for explaining a process of extruding and laminating a polyethylene film after printing a thermocompression-bonded embossed polyester / spunbond nonwoven fabric.

[Explanation of symbols]

 11 ... Polyester / spunbond nonwoven fabric 12 ... Embossing 21 ... Polyethylene film 22 ... Embossing 31 ... Printing ink 41 ... Waterproof and breathable sheet for house wrap 42 ... Cross-cut pattern 43 ... Overlap line 44 ... 100 mm line 45 ... 500 mm line 46 ... 1000 mm line

Claims (4)

[Claims] 1. An emboss is formed beforehand by thermocompression bonding,
Polyester with a grid pattern printed on one side
A spunbonded non-woven fabric, and a polyethylene film in which embossing is formed on the printed surface of the above-mentioned polyester / spunbonded non-woven fabric in a checkerboard pattern so that cracks having waterproofness and moisture permeability are generated. Waterproof breathable sheet for house wraps. 2. The house according to claim 1, wherein the cross-cut pattern printed on the polyester / spunbond nonwoven fabric is composed of an overlay line and a plurality of line types whose cutting dimensions are known. Waterproof breathable sheet for wrap. 3. The waterproof moisture-permeable sheet for a house wrap according to claim 1, wherein the polyethylene film is added with a weather resistance improver and / or an ultraviolet absorber. 4. A step of printing a cross-cut pattern on one side of a polyester / spunbond nonwoven fabric on which embossing has been previously formed by thermocompression bonding, and a polyethylene film on the printed surface of the cross-cut pattern of the polyester / spunbond nonwoven fabric. A method for producing a waterproof and moisture-permeable sheet for a house wrap, comprising: an extrusion laminating step; and a step of forming an emboss so that a crack having a waterproof and moisture-permeable property is generated in a polyethylene film.