JP2002356958A - Laminated sheet for house lap or sheathing roof board - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a sheet material with superior strength and lightweight, construction, handling performance, and durability when used as a house lap material or a roof sheathing beard sheet. SOLUTION: This laminated sheet is formed by arranging (B) nonwoven fabric having areal density of 30 g/m<2> or less composed of olefinic polymer extra fine fiber having an avergae fiber diameter of 5 μm or less on one surface or both surfaces of (A) span bond nonwoven fabric having areal density of 30 g/m<2> or more composed of an ester polymer via (C) thermally adhesive nonwoven fabric having areal density of 15 g/m<2> or less composed of thermoplastic elastomer extra fine fiber having an average fiber diameter of 15 μm or shorter. The laminated sheet for a house lap or a sheathing roof board is characterized by adhering the respective nonwoven fabrics on a surface to each other.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a laminated sheet for house wrap or roof base. More specifically, the present invention relates to a laminated sheet for a house wrap or a roof base formed by laminating a specific nonwoven fabric. The laminated sheet of the present invention is effectively used as a house wrap material or as a roof base sheet in the ventilation method of the outer wall of a building such as a house for the purpose of windproof, moisture permeable and waterproof.

[0002]

2. Description of the Related Art In recent years, in the construction of a house or the like, a moisture-permeable / waterproof sheet material is provided between an outer wall and a heat insulating material provided inside thereof for the purpose of windproof, moisture-permeable and waterproof. For such sheet materials, (1) windproofing to prevent the outdoor cold air from entering the heat insulating material side, (2) water vapor generated indoors Functions and characteristics such as moisture permeability for escape to the outdoors, (3) waterproofness for preventing water droplets from penetrating into the heat insulating material, and (4) good workability are required. Also, under roof materials such as tile slate are installed under roof materials for the purpose of wind protection, moisture permeability, waterproofing, etc. In the same manner as described above, the functions and characteristics (1) to (4) described above are required.

Asphalt-impregnated felt has been widely used as a house wrap material or a roof base sheet. However, although asphalt-impregnated felt has a waterproof property, it has poor moisture permeability, and it is difficult to escape water vapor generated in a room to the outside. Also, JP-A-63
No. 223249 proposes a house wrap material composed of a composite product of a moisture-permeable / waterproof film and a polyolefin tape fabric. However, such a composite product is difficult to maintain a balance between moisture permeability and waterproofness. If the moisture permeability is increased, the waterproofness becomes insufficient, and if the waterproofness is maintained, the moisture permeability tends to be insufficient. In addition, there is a drawback that manufacturing is difficult.

In the field of disposable diapers and the like, a moisture-permeable / waterproof sheet in which a spunbonded nonwoven fabric is laminated on both sides or one side of a melt blown nonwoven fabric is used. However, moisture permeable waterproof property of the waterproof sheet is used in the field such as disposable diapers, and hundreds mmH 2 _O approximately in water pressure resistance, high water resistance (resistance to such as that sought housewrap material or roof bed sheet Water pressure).

[0005] As a method for producing the above-mentioned moisture-permeable / waterproof sheet used for disposable diapers in which a spunbonded nonwoven fabric is laminated on both sides or one side of a meltblown nonwoven fabric, an embossing method or a calendering method using a flat roll is generally adopted. ing. However, in the case of embossing, edge cuts due to linear projections of the embossing device are apt to occur in the nonwoven fabric, and it is difficult to smoothly produce a desired moisture-permeable / waterproof sheet. If the embossing conditions are relaxed to prevent edge breakage, the bond between the melt blown nonwoven fabric and the spunbonded nonwoven fabric is not sufficiently performed, and the peel strength is reduced. Such a moisture-permeable / waterproof sheet cannot be used not only for disposable diapers but also for applications such as house wrap materials and roof base sheets requiring high strength. In the case of calendering, there is no problem of edge breakage, but a high adhesive pressure is required to bond the melt blown nonwoven fabric and the spunbonded nonwoven fabric over the entire surface, and therefore, it is necessary to use a specific calendering device. By increasing the temperature at the time of calendering, it is possible to bond the melt blown nonwoven fabric and the spunbonded nonwoven fabric at a relatively low pressure, but in that case, the porous structure of the nonwoven fabric is likely to be reduced and the film is likely to be formed, It becomes difficult to manufacture a moisture-permeable / waterproof sheet having a good balance between moisture permeability and waterproofness. By using a hot melt adhesive, the melt-blown non-woven fabric and the spun-bonded non-woven fabric can be bonded to each other smoothly, but the weight permeation (mass) of the moisture-permeable and waterproof sheet increases, Tends to be difficult to balance.

[0006]

SUMMARY OF THE INVENTION An object of the present invention is to provide a sheet which does not have the above-mentioned problems in the prior art, is excellent in windproofness, moisture permeability and waterproofness, and has a balance of these characteristics. It is an object of the present invention to provide a windproof, moisture-permeable and waterproof sheet material which is effective as a material, particularly a house wrap material or a roof base sheet. An object of the present invention is to provide a sheet material that is excellent in strength and lightness, and is excellent in a construction method, handleability, and durability when used as a house wrap material or a roof base sheet.

[0007]

The present inventors have intensively studied to achieve the above object. As a result, a specific spunbonded nonwoven fabric made of ester-based polymer fibers,
A laminated sheet obtained by surface bonding a specific ultrafine nonwoven fabric made of an olefin polymer and a specific thermoadhesive nonwoven fabric made of a thermoplastic elastomer ultrafine fiber is excellent in windproofness, moisture permeability and waterproofness, Moreover, those characteristics must be well-balanced, especially 10 seconds / 100cc.
It has been found that it is possible to combine the above air permeability, moisture permeability of 4500 g / m ² · day or more and water resistance of 1050 mmH ₂ O or more, and it is suitable as a house wrap material or a roof base material sheet.

That is, the present invention relates to a spunbond nonwoven fabric (A) comprising an ester polymer and having a basis weight of 30 g / m ² or more.
On one or both surfaces of the olefin polymer microfibers having an average fiber diameter of 5 μm or less via a thermoadhesive nonwoven fabric (C) having a basis weight of 15 g / m ² or less made of a thermoplastic elastomer ultrafine fiber having an average fiber diameter of 15 μm or less. 30g /
A laminated sheet formed by arranging the m ² or less of the nonwoven fabric (B), a laminated sheet for house wrap or for the roof bed, characterized in that the nonwoven fabrics are formed by surface-bonded.

[0009]

DESCRIPTION OF THE PREFERRED EMBODIMENTS The present invention will be described below in detail. As described above, the laminated sheet for a house wrap or a roof base of the present invention (hereinafter sometimes simply referred to as the “laminated sheet of the present invention”) is a spunbond having a basis weight of 30 g / m ² or more made of an ester-based polymer, as described above. on one side of the nonwoven fabric (a), the average fiber diameter 5μm or less of the olefin consisting of polymer ultrafine fibers having a basis weight 30 g / m ² or less of the nonwoven fabric (B) are arranged, and disposed between the nonwoven fabric, the average fiber diameter 15μm following 15 g / basis weight of thermoplastic elastomer microfiber
m are thermally bonded to the surface shape by ² or less thermally bonded nonwoven (C), it has a three-layer structure of (A) / (C) / (B). Further, in the present invention, ester type on both surfaces of the polymer than becomes a basis weight 30 g / m ² or more spunbond nonwoven (A), consisting of the following olefin polymer ultrafine fibers having an average fiber diameter 5μm basis weight 30 g / m ² or less of the nonwoven fabric (B) is arranged and arranged between both nonwoven fabrics, and a basis weight of 15 g / m of a thermoplastic elastomer ultrafine fiber having an average fiber diameter of 15 μm or less.
^By performing surface bonding with a heat-bondable nonwoven fabric (C) of ² or less, a five-layer body of (B) / (C) / (A) / (C) / (B) can be obtained. In the present invention, the average fiber diameter of the ultrafine fibers constituting each nonwoven fabric is an average value of values obtained by measuring the fiber diameter of 100 arbitrary fibers by enlarging and photographing the nonwoven fabric using a scanning electron microscope (SEM). Say

The laminated sheet of the present invention having the above-mentioned layer structure generally has an air permeability of 10 seconds / 100 cc or more, a moisture permeability of 4500 g / m ² · day or more, and a water pressure of 10 or more.
It is 50 mmH ₂ O or more, and is extremely excellent in windproof performance, moisture permeability performance, and waterproof performance, and has these characteristics in a well-balanced manner. Therefore, the laminated sheet of the present invention is suitably used as a sheet for a house wrap or a roof base which is required to be excellent in windproof, moisture-permeable and waterproof properties and to have those properties in a well-balanced manner. In particular, the laminated sheet of the present invention is disposed between an outer wall and a heat insulating material and the like for the purpose of windproof, moisture-permeable, and waterproof in buildings such as houses and buildings, particularly in wooden houses and prefabricated houses. It is suitably used as a house wrap material. Furthermore, the laminated sheet of the present invention is
For the purpose of moisture permeability and waterproofing, it is suitably used as a roof base sheet disposed under roof materials such as roof tiles and slate. The air permeability of the laminated sheet in the present invention is determined by JI
It refers to the air permeability measured according to SP 8117. The moisture permeability refers to the moisture permeability measured according to JIS Z 0208.
In addition, the water pressure resistance refers to the water pressure measured according to JIS L 1092-A method.

The spunbonded nonwoven fabric (A) comprising the ester-based polymer fibers constituting the laminated sheet of the present invention is a spunbonded nonwoven fabric having a basis weight of 30 g / m ² or more. Spunbonded nonwoven fabric is a nonwoven fabric obtained by drawing and drawing a melt-spun filament from a spinning nozzle, uniformly opening the filament by charging or the like to form a random web, and bonding the filament. Spunbonded nonwoven fabrics are composed of long fiber filaments and therefore have better mechanical properties such as tear strength than nonwoven fabrics composed of short fibers. The spunbond nonwoven fabric (A) used in the laminated sheet of the present invention has a basis weight of 30 g as described above.
/ M ² or more, and the basis weight is 30 g / m 2.
^If it is less than ² , the mechanical properties of the laminated sheet, particularly the tear strength, will be insufficient. In view of the strength of the laminated sheet, it is preferable that the basis weight of the spunbonded nonwoven fabric (A) is 35 g / ^{m 2} or more, more preferably 40 to 50 g / ^{m 2.}

The ester polymer fibers forming the spunbond nonwoven fabric (A) may be any fibers made of a fiber-forming ester polymer, such as polyethylene terephthalate (PET) fibers and polybutylene terephthalate. (PBT) fibers, composite spun fibers of polyethylene terephthalate and modified polyethylene terephthalate, and mixed spun fibers.

In the present invention, an ester polymer and
Then, a recycled polyester can be used. Recycled poly
50% by mass or more of the ester based on the total mass of the laminated sheet of the present invention
Can use "Eco Mark" certification
Is preferred in that The recycled polyester used is fiber,
Shearing, pulverizing and melting and solidifying films, molded products, etc.
Is obtained. In particular, complaining about the gentleness of the environment in recent years
Polyethylene bottles recycled from PET bottles
Spunbond nonwoven made from phthalate chips
Use of a cloth makes it environmentally friendly and breathable and waterproof.
Can be For example, in Example 1 described later,
Polyester spunbond obtained from PET bottles
Non-woven fabric (A) 50 g / m²Product of the present invention
Weight of 80g / m ²And recycled polyester
Certified "Eco Mark" to account for 62.5% by mass of the body
Is obtained. The standard of the laminated sheet is 1000 mm width x 5
0m, 1.5L PET bottle to get it
50 bottles and 75 bottles with 500 mL
And

The average fiber diameter of the fibers constituting the spunbonded nonwoven fabric (A) is not particularly limited, but is preferably 10 μm or more, preferably 20 to 30 μm, from the viewpoint of mechanical properties and the like.
Is more preferable.

The nonwoven fabric (B) constituting the laminated sheet of the present invention is a nonwoven fabric made of olefin polymer ultrafine fibers having an average fiber diameter of 5 μm or less, and has a basis weight of 30 g.
/ M ² or less. When the average fiber diameter of the olefin polymer constituting the nonwoven fabric (B) is larger than 5 μm, a laminated sheet excellent in windproofness, moisture permeability and waterproofness cannot be obtained. The average fiber diameter of the olefin polymer constituting the nonwoven fabric (B) is preferably 3 μm or less, more preferably 1 to 3 μm, from the viewpoint of windproof, moisture permeable and waterproof performance in the laminated sheet. Even if the basis weight of the nonwoven fabric (B) exceeds 30 g / m ² , there is no significant adverse effect on the windproof, moisture permeable, and waterproof performance of the laminated sheet, but the laminated sheet is inferior in lightness, handleability, and workability. And is disadvantageous in terms of cost. Basis weight of the nonwoven fabric (B) is preferably at 25 g / ^{m 2} or less, and more preferably 15-25 g / ^{m 2.}

The method for producing the nonwoven fabric (B) is not particularly limited, but is preferably produced by a melt blown method using an olefin polymer. By using the melt blown method, a nonwoven fabric made of olefin polymer ultrafine fibers having an average fiber diameter of 5 μm or less and having a basis weight of 30 g / m ² or less can be produced smoothly and with good productivity.

The olefin polymer fibers constituting the nonwoven fabric (B) may be any fibers made of a fiber-forming olefin polymer, such as polypropylene, polyethylene, or a mixture of polypropylene and polyethylene. Among them, polypropylene fiber is preferable from the viewpoint of heat resistance, fiber forming property and the like.

The heat-bondable nonwoven fabric (C) constituting the laminated sheet of the present invention is a nonwoven fabric made of ultrafine thermoplastic elastomer fibers having an average fiber diameter of 15 μm or less and having a basis weight of 15 g / m ² or less. When the average fiber diameter of the thermoplastic elastomer fibers constituting the heat-bondable nonwoven fabric (C) exceeds 15 μm, the mesh of the heat-bondable nonwoven fabric (C) becomes coarse, and the spunbond nonwoven fabric (A) and the nonwoven fabric (B) are satisfactorily prepared. The surface cannot be adhered, and delamination tends to occur in the laminated sheet. The thermoplastic elastomer constituting the heat-adhesive nonwoven fabric (C), since the heat-adhesion performance of the heat-adhesive nonwoven fabric (C) is further improved and the obtained laminated sheet has better windproof, moisture-permeable and waterproof performance. The average fiber diameter of the ultrafine fibers is preferably 10 μm or less, more preferably 2 to 10 μm.

The heat-bondable nonwoven fabric (C) has a basis weight of 15 g.
/ M ² , there is no significant adverse effect on the windproof, moisture-permeable and waterproof performance of the laminated sheet, but the laminated sheet becomes inferior in lightness, handleability, workability, and cost. Disadvantaged from. The basis weight of the heat-bondable nonwoven fabric (C) is preferably 10 g / m ² or less,
More preferably, it is 0 g / m ² .

The thermoplastic elastomer ultrafine fibers constituting the heat-adhesive nonwoven fabric (C) are ultrafine fibers made of a fiber-forming thermoplastic elastomer and constituting the spunbond nonwoven fabric (A) and the nonwoven fabric (B). Any fine fibers made of a thermoplastic elastomer that can be melted at a lower temperature may be used, and examples thereof include a polystyrene-based thermoplastic elastomer, a polyolefin-based thermoplastic elastomer, a polyurethane-based elastomer, a polyester-based thermoplastic elastomer, and a polyether-based thermoplastic. Ultrafine fibers made of an elastomer, a polyamide-based thermoplastic elastomer, or the like can be given. Among them, the heat-adhesive nonwoven fabric (C) is formed from ultrafine fibers made of a polystyrene-based thermoplastic elastomer, ultrafine fibers made of a mixture of a polystyrene-based thermoplastic elastomer and an olefin-based resin, or ultra-fine fibers made of an olefin-based thermoplastic elastomer. Is preferred. When the heat-adhesive nonwoven fabric (C) is formed from these ultrafine fibers, the heat-adhesive nonwoven fabric (C) and the spun-pound nonwoven fabric (A)
In addition, the thermal adhesiveness between the heat-bondable nonwoven fabric (C) and the nonwoven fabric (B) is improved, and a laminated sheet having high peel strength can be obtained. In particular, it is more preferable that the heat-adhesive nonwoven fabric (C) is formed from ultrafine fibers made of a polystyrene-based thermoplastic elastomer, or is formed from ultrafine fibers made of a mixture of a polystyrene-based thermoplastic elastomer and an olefin-based resin. preferable.

Examples of the polystyrene-based thermoplastic elastomer preferably used for forming ultrafine fibers of the thermoplastic elastomer constituting the heat-bondable nonwoven fabric (C) include, for example, styrene-butadiene-styrene block copolymer (SB)
S), styrene-isoprene-styrene block copolymer (SIS), styrene-ethylene-butylene-styrene block copolymer (SEBS) (hydrogenated product of SBS), styrene-ethylene-propylene-styrene block copolymer ( SEPS) (a hydrogenated product of SIS) and the like. The ultrafine fibers constituting the heat-bondable nonwoven fabric (C) may be formed using one kind of the above-mentioned polystyrene-based thermoplastic elastomer, may be formed using two or more kinds thereof, or may be formed using the above-described polystyrene-based thermoplastic elastomer. It may be formed using a mixture of one or more thermoplastic elastomers and an olefin resin.

When the ultrafine fibers constituting the heat-adhesive nonwoven fabric (C) are formed from a mixture of a polystyrene-based thermoplastic elastomer and an olefin-based resin, the ratio of the polystyrene-based thermoplastic elastomer to the mass of the mixture is as follows. The content is preferably 50% by mass or more from the viewpoint of adhesiveness, and more preferably 60% by mass or more. Examples of the olefin resin used as a mixture with the polystyrene thermoplastic elastomer include polypropylene, polyethylene, and ethylene / propylene copolymer. These olefin resins may be used alone or in combination of two or more. May be used in combination.

The polyolefin-based thermoplastic elastomer preferably used for forming ultrafine fibers of the thermoplastic elastomer constituting the heat-bondable nonwoven fabric (C) is, for example, an olefin-based resin such as polypropylene or polyethylene as a hard segment. Ethylene / propylene / diene copolymer (EP
For example, a thermoplastic elastomer obtained by simply mixing the two using an olefin-based rubber such as DM), a thermoplastic elastomer obtained by partially bonding and reacting both, and a thermoplastic elastomer obtained by vulcanizing and mixing the two can be used. .

The method for producing the heat-bondable nonwoven fabric (C) is not particularly limited, but is preferably produced by a melt blown method using a thermoplastic elastomer. By employing the melt blown method, it is possible to use a thermoplastic elastomer ultrafine fiber having an average fiber diameter of 15 μm or less and a basis weight of 1
A nonwoven fabric of 5 g / m ² or less can be produced smoothly and with good productivity. In particular, a spunbonded nonwoven fabric (A) made of a polyester polymer fiber is obtained by forming a nonwoven fabric by a melt blown method using a thermoplastic elastomer such as a polystyrene-based thermoplastic elastomer or a mixture of a polystyrene-based thermoplastic elastomer and an olefin-based resin. ) And the non-woven fabric (B) made of an olefin polymer ultrafine fiber, and a nonwoven fabric with a small fiber diameter is obtained. Therefore, such a heat-bondable non-woven fabric (C) functions as a surface adhesive between the spun-bonded non-woven fabric (A) and the non-woven fabric (B), and becomes a film-like film.
Contributes to improved waterproof performance.

A polystyrene-based thermoplastic elastomer or a mixture of a polystyrene-based thermoplastic elastomer and an olefin-based resin has a low softening point (melting point) and exhibits thermal adhesiveness at a low temperature. It is possible to prevent the spunbonded nonwoven fabric (A) and the nonwoven fabric (B) disposed on both sides of C) from becoming extremely thin due to softening and melting.

The polystyrene-based thermoplastic elastomer is sticky and stretchable. Accordingly, a nonwoven fabric made of ultrafine fibers of a polystyrene-based thermoplastic elastomer, particularly a nonwoven fabric made of ultrafine fibers made of 100% polystyrene-based thermoplastic elastomer, may be difficult to handle due to its adhesiveness and elasticity. Therefore, when the laminated sheet of the present invention is manufactured using a polystyrene-based thermoplastic elastomer, a method of reducing the adhesiveness of the nonwoven fabric using a lubricant, or one of a spunbond nonwoven fabric (A) and a nonwoven fabric (B) is used. A method in which a nonwoven fabric is formed by directly melt-blowing a polystyrene-based thermoplastic elastomer on the surface may be employed. Olefin-based resins have excellent compatibility with polystyrene-based thermoplastic elastomers, and olefin-based resins have the function of suppressing the adhesiveness and elasticity of polystyrene-based thermoplastic elastomers. When the mixture is used, spinnability, process passability, and the like when producing a heat-bondable nonwoven fabric (C) by a melt blown method or the like,
The handleability can be improved. The mixing ratio of the olefin-based resin can be appropriately set in consideration of handleability, etc., but as described above, generally, the mixing ratio is 50% by mass or less based on the total mass of the polystyrene-based thermoplastic elastomer and the olefin-based resin. Preferably, there is.

In the laminated sheet of the present invention, at least one of the spunbonded nonwoven fabric (A), the nonwoven fabric (B), and the heat-adhesive nonwoven fabric (C) constituting the laminated sheet contains an ultraviolet absorber. Is preferred. At least 2 of spunbond nonwoven fabric (A) and nonwoven fabric (B)
More preferably, the nonwoven fabric contains an ultraviolet absorber. The form of the ultraviolet absorber contained in the nonwoven fabric may be either present in (added to) the fibers constituting the nonwoven fabric and / or present (adhered) to the surface of the fibers. It is preferable to have it exist. By including an ultraviolet absorber in the nonwoven fabric forming the laminated sheet, the durability of the laminated sheet when used as a house wrap material or a roof base sheet is improved. The content of the ultraviolet absorber in the nonwoven fabric may vary depending on the type of the ultraviolet absorber, the type and form of the nonwoven fabric, etc., but is generally 0.5 to 2.0% by mass based on the mass of the nonwoven fabric. Is preferred.

The type of the UV absorber is not particularly limited, and UV absorbers conventionally used for the polymer forming each nonwoven fabric can be used, for example, 2-hydroxy-4-methoxy-benzophenone. , 2-hydroxy-
Benzophenone-based ultraviolet absorbers such as 4-n-octoxy-benzophenone and 4-dodecyloxy-2-hydroxy-benzophenone, 2- (2′-hydroxy-3 ′,
5′-di-t-butylphenyl) benzotriazole, 2
Benzotriazole UV absorbers such as-(2'-hydroxy-3'-t-butyl-5'-methylphenyl) benzotriazole, and salicylate UV absorbers such as p-octylphenyl salicylate and dodecyl salicylate Agent, 2-ethylhexyl-2-cyano-3,
Examples thereof include 3-diphenyl acrylate.

In the laminated sheet of the present invention, it is more preferable that the spunbond nonwoven fabric (A) constituting the sheet is subjected to a water-repellent treatment. This water-repellent treatment not only changes the windproof, moisture-permeable, and waterproof performance, but also prevents water droplets that have penetrated from holes or the like in the tucker from remaining on the surface of the spunbonded nonwoven fabric (A) during construction. Without such a water-repellent treatment, the spunbond nonwoven fabric (A) may contain water with the passage of time and may look like a stain from the opposite surface, impairing the appearance. Examples of the water repellent include a silicon-based water repellent, a fluorine-based water repellent, a paraffin-based, a wax-based, a triazine-based, a zirconium-based, and an amine-based. The form of the water repellent contained in the nonwoven fabric may be either present (added) to the fibers constituting the nonwoven fabric and / or present (adhered) to the surface of the fibers. In particular, it is preferable that the fibers are present in the fibers. However, since they are not used for long-term exposure to the open air, and in view of costs, the fibers adhere to the surface of the fibers of the spunbond nonwoven fabric (A) constituting the laminated sheet. Just need to be. The content of the water repellent in the spunbond nonwoven fabric (A) may vary depending on the type of the water repellent, the type and form of the nonwoven fabric, etc., but is generally 0.2 to 5% by mass based on the mass of the nonwoven fabric.
It is preferable that Spunbond nonwoven fabric (A)
May be pre-processed, or may be processed on the spun bond (A) side after lamination.
It is more preferable because the adhesion strength of the laminate is not hindered.

The method for producing the laminated sheet of the present invention is not particularly limited, and a method in which the spunbonded nonwoven fabric (A) and the nonwoven fabric (B) can be well bonded in a planar manner with the thermoadhesive nonwoven fabric (C). Any method may be used as long as it can be produced, for example, by a calendering method, a press process, or the like. Among them, the calendering method is preferably employed because the laminated sheet of the present invention can be continuously produced with high productivity in a stable state. In the present invention, it is most preferable that the entire surface (100%) of the sheet is adhered, but a non-adhered portion may be present as long as the effect of the present invention is not impaired. .

In producing the laminated sheet of the present invention by calendering, the non-woven fabric (B) is arranged on the side of a metal heating roll, and heating, bonding and lamination are performed. Good heat conduction to the
It is preferable because the heat bonding by the heat bonding nonwoven fabric (C) is performed smoothly. The temperature of the heating roll at that time depends on the type of the olefin polymer ultrafine fiber constituting the nonwoven fabric (B),
The temperature may vary depending on the type of the thermoplastic elastomer ultrafine fibers constituting the heat-adhesive nonwoven fabric (C), but generally a temperature of 120 to 150 ° C (roll surface temperature) is preferably employed. Although calendering can be performed by arranging the spunbonded nonwoven fabric (A) on the heating roll side, in this case, the formation of the spunbonded nonwoven fabric (A) is coarse and the average diameter of the fibers constituting the nonwoven fabric is large. Therefore, heat conduction from the heating roll to the heat-bonding nonwoven fabric (C) is reduced, so that the temperature of the heating roll is set higher than when the nonwoven fabric (B) is arranged on the heating roll side and calendering is performed. There is a need to. This description is based on the premise that a single-sided heating roll is a rubber roll and the other party is a heating roll. The processing conditions for calendering may be set so as to obtain a laminated sheet having predetermined windproof, moisture-permeable and waterproof properties. On-site management is based on JIS, which is an indicator of wind resistance.
When the measurement is performed while measuring the air permeability based on P8117, the process management is easy.

At the time of calendering, the spun-bonded nonwoven fabric (A), the nonwoven fabric (B), and the heat-adhesive nonwoven fabric (C) may be nipped at once and calendered. Then, the temperature may be raised quickly, and the spun-bonded nonwoven fabric (A) and the adhesive nonwoven fabric (C) may be guided to the nip roll to carry out a calendering process to improve whiteness. That is, when the nonwoven fabric (B) is produced by a melt blown method, the fibers are not oriented, and the degree of whiteness can be improved by crystallization by heat treatment. That is, the former can obtain a transparent sheet, and the latter can obtain a sheet having excellent concealing properties, without impairing the function as a windproof, moisture-permeable and waterproof sheet. In the present invention, it can be set appropriately according to the application.

The laminated sheet of the present invention is used as a sheet for a house wrap or a roof base because it has excellent windproof, moisture permeable, and waterproof properties and has a good balance of these properties.

[0034]

EXAMPLES The present invention will be specifically described below with reference to examples and the like, but the present invention is not limited to the following examples. <Example 1>-Production of nonwoven fabric (1) Spunbonded nonwoven fabric (A) (average fiber diameter 14.3) using recycled PET recycled from a commercially available PET bottle
μm, basis weight 50 g / m ² ). (2) Using polypropylene (MFR = 500 g / 10 min), a nonwoven fabric (B) made of ultrafine polypropylene fibers by a melt blown method (average fiber diameter = 2.3 μm,
20 g / m ² ). (3) Polystyrene-based thermoplastic elastomer [styrene-ethylene-propylene-styrene block copolymer (SEPS); "Septon" manufactured by Kuraray Co., Ltd.] 60 parts by mass and polypropylene (MFR = 200 g / 10 min) 4
Using a mixture of 0 parts by mass, a heat-adhesive nonwoven fabric (C) made of ultrafine fibers by a melt blown method (average fiber diameter =
8.5 μm, weight = 10 g / m ² ).・ Manufacture of laminated sheet The spunbonded nonwoven fabric (A) is used as the lowermost layer, the thermoadhesive nonwoven fabric (C) produced in the above (2) is laminated thereon, and the nonwoven fabric (B) is further laminated thereon to form a three-layer body. And The non-woven fabric (B) was supplied to a calendering device comprising a heating roll made of specular iron and a rubber roll set at a temperature of 145 ° C. so that the non-woven fabric (B) was on the heating roll side, and a linear pressure of 9% was applied.
The laminated sheet of Example 1 was obtained by performing calendering at 0 Kg / cm at a speed of 20 m / min.

<Example 2> Nonwoven fabric 3 used in Example 1
When calendering was performed using the types, the nonwoven fabric (B) made of ultrafine fibers was not guided directly to the nip roll, but was guided to the nip roll along the heating roll. The other two types of nonwovens are led directly to the nip roll,
The laminated sheet of Example 2 was obtained by performing calendering.

Example 3 Water-repellent treatment using a gravure roll on the spunbonded nonwoven fabric (A) side of the laminated sheet obtained in Example 1 (aqueous fluorine-based water-repellent oil agent, 0.3 g / m2)
² ) to obtain a laminated sheet of Example 3.

Example 4 A 7 g / m ² heat-bonding nonwoven fabric (C) was placed on both sides of the polyester spunbonded nonwoven fabric (A) used in Example 1, and further 10 g / m ^{2 on the} outside thereof. arranged comprising nonwoven fabric (B) from ultrafine fiber of 15 g / m ² and, 15 g / m ² nonwoven fabric (B) is subjected to calendering so that the heating roll side, to obtain a laminated sheet of example 4 .

<Comparative Example 1> The nonwoven fabric (B) made of the ultrafine polypropylene fibers and the spunbonded nonwoven fabric (A) used in Example 1 were calendered without using the heat-bonding nonwoven fabric (C). A layered body was obtained.

<Comparative Example 2> Nonwoven fabric 3 used in Example 1
The seeds were laminated and embossed (rhombic, crimping area 19%) to obtain a laminated sheet. <Comparative Example 3> Ethylene-α- as the adhesive nonwoven fabric (C)
Using an olefin-based thermoplastic elastomer resin composed of an olefin copolymer, a heat-bondable nonwoven fabric (fiber diameter = 23 μm, basis weight = 10 g / m ² ) by a melt blown method.
A laminated sheet was obtained in the same manner as in Example 1 except for using.

The air permeability, moisture permeability and water pressure resistance of the laminated sheets obtained in each of the examples and comparative examples were measured according to JIS P
8117, JIS Z 0208, JIS L 109
The results of measurement according to the 2-A method were as shown in Table 1 below.

[0041]

[Table 1]

As is clear from the results shown in Table 1 above, the laminated sheets obtained in Examples 1 to 4 have functions and characteristics that sufficiently satisfy the industrial standard "A 6111" of the moisture-permeable and waterproof sheet. It can be used as a sheet for house wraps or roof bases. Further, in Example 1, a laminated sheet having a transparent feeling was obtained, whereas in Example 2, an improvement in whiteness of the raw material was observed. In Example 3, the degree of water repellency was high, and no water droplets remained on the surface. Further, the entire surface (100%) of the laminated sheet obtained in the example was surface-bonded, and the peel strength was measured in accordance with JIS L 1085. In contrast, Comparative Example 1
Has no adhesive non-woven fabric (C) and has no compatibility between the olefin non-woven fabric and the polyester non-woven fabric.
When the peel strength was measured according to No. 085, it was easily peeled. Comparative Example 2 was not able to meet the moisture-permeable / waterproof standard because of partial adhesion. In Comparative Example 3, although the adhesiveness was sufficient, the fiber diameter of the heat-adhesive nonwoven fabric (C) was increased, so that the formation was coarse and the air permeability was higher than in Comparative Examples 1 and 2. The eyes of the nonwoven fabric (B) made of fiber could not be sufficiently filled, and the standard of air permeability could not be cleared.

[0043]

The laminated sheet for house wrap or roof base according to the present invention is excellent in windproofness, moisture permeability and waterproofness, and has a good balance of these characteristics, so that it is highly windproof, moisture permeable and waterproof. The function can be sufficiently exhibited as a house wrap material or a roof base material requiring performance.

──────────────────────────────────────────────────続 き Continued on the front page (51) Int.Cl. ⁷ Identification symbol FI Theme coat ゛ (Reference) D06M 17/00 HLF term (Reference) 4F100 AK03A AK03E AK41C AL09B AL09D BA05 BA06 BA10A BA10E CA07A CA07E DG03A DG03E DG15A DG15B DG15C DG15D DG15E GB07 JB16B JB16D JD02 JD04 JD05 JL12B JL12D JL16C YY00A YY00B YY00C YY00D YY00E 4L032 AA05 AA07 AB04 AC01 AC02 BA05 BA09 BB00 BD01 BD03 CA03 DA02 EA00

Claims (9)

[Claims] 1. A unit weight of 30 g / consisting of an ester polymer
on one or both sides of the m ² or more spunbond nonwoven (A), through basis weight 15 g / m ² or less thermally bonded nonwoven fabric consisting of thermoplastic elastomer ultra-fine fibers having an average fiber diameter 15μm and (C), the average fiber diameter basis weight 30 g / m ² or less of the nonwoven fabric consisting of olefin polymer ultrafine fibers 5μm and (B) a laminated sheet formed by arranging, or for house wrap each nonwoven fabric characterized by comprising the surface-bonded Laminated sheet for roof foundation. 2. Permeability of 10 seconds / 100 cc or more, moisture permeability
Degree of 4500g / m ²・ Day or more, and water pressure resistance is 1
050mmH₂The house la according to claim 1, which is O or more.
Laminated sheet for ceiling or roof base. 3. A non-woven fabric comprising a heat-bondable non-woven fabric (C) made of a polystyrene-based thermoplastic elastomer ultrafine fiber produced by a melt blown method, a non-woven fabric made of an ultra-fine fiber made of a mixture of a polystyrene-based thermoplastic elastomer and an olefin resin, or The laminated sheet for a house wrap or a roof base according to claim 1 or 2, which is a nonwoven fabric made of a polyolefin-based thermoplastic elastomer ultrafine fiber. 4. The laminated sheet for a house wrap or a roof base according to claim 1, wherein the nonwoven fabric (B) is a nonwoven fabric produced by a melt blown method. 5. The nonwoven fabric according to claim 1, wherein at least one of the spunbonded nonwoven fabric (A), the nonwoven fabric (B), and the heat-bondable nonwoven fabric (C) contains an ultraviolet absorbent. The laminated sheet for house wrap or roof base according to claim 1. 6. The fiber according to claim 1, wherein the fibers constituting the spunbond nonwoven fabric (A) include recycled polyester.
A laminated sheet for a house wrap or a roof base according to the above item. 7. The laminated sheet for a house wrap or a roof base according to claim 1, wherein the nonwoven fabric (A) is water-repellent. 8. A house wrap material using the laminated sheet according to claim 1. 9. A roof base comprising the laminated sheet according to claim 1.