JPH06207359A - Air-permeable reinforced nonwoven fabric and its production - Google Patents

Abstract

PURPOSE:To provide an air-permeable nonwoven fabric high in mechanical strength with fine stitches, thus also usable as a filter, etc., and to provide a method for producing such nonwoven fabrics at low cost. CONSTITUTION:At least one side of 1st high-melting thermoplastic resin layer is laminated with 2nd thermoplastic resin layer(s) lower in melting point than the 1st thermoplastic resin to produce an air-permeable multilayer drawn film. Then, a fibrous random nonwoven fabric and/or fibrous web is monolithically bound, through heat fusing, to the surface of the 2nd thermoplastic resin layer.

Description

Detailed Description of the Invention

[0001]

FIELD OF THE INVENTION The present invention relates to a split fiber nonwoven fabric obtained by splitting a stretched multi-layer film by splitting a split film so that the orientation axes cross each other, and a stretched tape in which the orientation axes cross each other. At least one kind of non-woven fabric or woven fabric selected from woven fabrics obtained by weaving a weft-laminated non-woven fabric and a stretched tape thereof so that the orientation axes intersect with each other, a random non-woven fabric, an adhesive fiber or a web thereof and a mixture thereof. The present invention relates to a breathable reinforced non-woven fabric formed by integrating at least one non-woven fabric selected from the following non-woven fabric, an adhesive fiber or a web thereof by heat fusion, and a method for producing the same. These breathable reinforced nonwoven fabrics
It is used for agricultural covering materials, golf course green covers, filters, drainage bags, various other bags, oil-adsorbing materials, agricultural and horticultural materials such as flower wraps and house wraps, and construction materials.

[0002]

2. Description of the Related Art Conventionally, as a non-woven fabric, there are known ones made by a resin bond method, a stitch bond method, a spun bond method, a melt blow method, a needle punch method, a wet method and the like. Among these, as a typical nonwoven fabric, a resin bond method using an adhesive such as a hot melt adhesive or a stitch bond method using a stitch bond, or a melt-spun unstretched filament bundle is introduced into an aspirator jet. , Suction-bonding is performed by sucking and jetting with pressurized air, imparting static electricity at the same time as stretching, and opening it into a single fiber due to its repulsive force, and at the same time accumulating on a conveyor having an electric charge opposite to that of the filament. Proposed so far. For example, Japanese Patent Publication No. 37-4993
No. 4, Japanese Patent Publication No. 43-26599, Japanese Patent Publication No. 44-1491
No. 3, JP-B-44-21817, JP-B-45-194
No. 1, JP-B-45-1942, JP-B-45-1077
No. 9, JP-B-45-33876, JP-B-46-331
Publications such as No. 7 are cited as examples thereof.

However, the non-woven fabric prepared by the conventional resin bond method, stitch bond method, spun bond method, melt blow method or the like is formed by the entanglement of fibers, or is bonded by a hot melt type adhesive or the like in order to prevent misalignment. It is customary to use an agent, which has fine meshes and is useful as a filter and the like, but has a problem that mechanical strength such as tensile strength is low due to insufficient stretching. ing. On the other hand, as the stretched nonwoven fabric, after the molten resin is formed into a film with a T die or a tubular die and stretched,
Split fiber non-woven fabric obtained by splitting the split fibers of the network structure obtained by splitting (split fibers) to a fixed width, fixing them, and laminating them so that the orientation axes intersect (Japanese Patent Publication No.
-2786, Japanese Patent Publication No. 47-4738 and Japanese Patent Publication No. 5
2-4672). However, although this non-woven fabric has mechanical strength, it has the disadvantages that the non-woven fabric is coarse and cannot be used for applications such as filters and heat-retaining agricultural coating materials.

[0004]

SUMMARY OF THE INVENTION The present invention solves the above problems and has a high mechanical strength and a fine mesh, and has a filter, a gauze, a sheet, a mask, a cloth core material, and a battery separator. , Oil adsorbents, wipers, roofing base materials, house wraps, agricultural covering materials, golf course grin covers, drainers, various bags, mining and industrial materials such as flower wraps, agricultural and forestry materials, civil engineering materials, etc. It is an object of the present invention to provide a breathable reinforced non-woven fabric that can be used for many purposes, and a method for inexpensively producing the same.

[0005]

Means for Solving the Problems The inventors of the present invention have made earnest studies in view of the above-mentioned objects, and as a result, split fiber nonwoven fabric made of a film obtained by splitting a specific multilayer uniaxially stretched film, nonwoven fabric made of multilayer uniaxially stretched tape, or The present invention has been accomplished by finding that a breathable reinforced nonwoven fabric obtained by heat-bonding a woven fabric and a fibrous random nonwoven fabric, an adhesive fiber, or a nonwoven fabric composed of a web thereof or a mixture thereof exhibits excellent functions. That is, the first invention is (A) of the following Group I,
At least one non-woven fabric or woven fabric selected from (B) and (C) and at least one non-woven fabric selected from (D), (E) and (F) of Group II; A breathable reinforced non-woven fabric, which is obtained by heat-bonding fibers or a web thereof through a second thermoplastic resin layer. [Group I] (A) The first thermoplastic resin layer may have a first
Second with a lower melting point than thermoplastics of
Multi-layer uniaxial stretching consisting of laminated thermoplastic resin layers
A split-fiber nonwoven fabric obtained by laminating the mesh-like split-fiber film with the orientation axes of the split-woven film so as to intersect with each other; (B) One side or both sides of the first thermoplastic resin layer,
Second with a lower melting point than thermoplastics of
Multi-layer uniaxial stretching consisting of laminated thermoplastic resin layers
A non-woven fabric obtained by laminating tapes in a weft-latitude manner so that the orientation axes intersect with each other; (C) a first thermoplastic resin layer having a
Second with a lower melting point than thermoplastics of
Multi-layer uniaxial stretching consisting of laminated thermoplastic resin layers
Woven fabric obtained by weaving a tape so that the orientation axes cross each other; [Group II] (D) Fibrous random nonwoven fabric; (E) Adhesive fiber or web thereof; (F) Fibrous random nonwoven fabric and adhesive fiber Or a non-woven fabric consisting of a mixture with the web;

A second aspect of the present invention is to provide at least one non-woven fabric of the group I split fiber non-woven fabric (A), non-woven fabric (B) made of stretched tape and woven fabric (C) made of stretched tape, or both sides of the woven fabric. At least one non-woven fabric, adhesive fiber or web thereof selected from the group II fibrous random non-woven fabric (D), adhesive fiber or web thereof (E) and non-woven fabric (F) consisting of a mixture thereof. A breathable reinforced non-woven fabric, characterized by being heat-sealed via the second thermoplastic resin layer. The third invention is
At least one non-woven fabric selected from the group II fibrous random non-woven fabric (D), adhesive fiber or its web (E) and non-woven fabric (F) consisting of a mixture thereof, on both sides of the adhesive fiber or its web, One kind of non-woven fabric or a woven fabric selected from the group I split fiber non-woven fabric (A), the non-woven fabric (B) made of a stretched tape and the woven fabric (C) made of a stretched tape is used as the second thermoplastic resin layer. A breathable reinforced non-woven fabric, characterized in that it is heat-fused through. A fourth invention is a method for producing a breathable reinforced nonwoven fabric according to the first, second and third inventions.

The present invention is described in detail below. Split fiber nonwoven fabric (A) obtained by splitting the multilayer uniaxially stretched film of Group I of the present invention or nonwoven fabric (B) made of multilayer uniaxially stretched tape
The woven fabric (C) is formed by forming a second thermoplastic resin layer having a melting point lower than that of the first thermoplastic resin on at least one surface of the high melting point first thermoplastic resin layer. . The multilayer uniaxially stretched film or tape preferably has a three-layer structure in which the second thermoplastic resin layer is provided on both surfaces of the first thermoplastic resin layer.

The split fiber nonwoven fabric (A) obtained by splitting the multi-layered uniaxially stretched film of Group I of the present invention is as illustrated in FIG. That is, two or more layers produced by extrusion molding such as a multilayer inflation method or a multilayer T-die method using a first thermoplastic resin and a second thermoplastic resin having a melting point lower than that of the first thermoplastic resin. The split fiber film obtained by slitting the multilayer film of (1) in a vertical or horizontal direction with a hot blade or the like, and uniaxially or biaxially orienting in a longitudinal or horizontal direction at an expansion ratio of 1.1 to 15 times, preferably 3 to 10 times. (See FIG. 2) is widened as desired, and is laminated by latitudinal and crosswise so as to intersect the orientation axis, and heat-fixed. In FIG. 2, reference numeral 1 is the first thermoplastic resin layer, and reference numerals 2 and 2 ′ are the first thermoplastic resin layer.
Is a second thermoplastic resin layer having a melting point lower than that of the thermoplastic resin.

Further, as shown in FIGS. 3 and 4, the nonwoven fabric (B) is obtained by laminating the warp and weft by intersecting the orientation axes of the stretched tape.
Alternatively, the woven woven fabric (C) uses a first thermoplastic resin and a second thermoplastic resin having a melting point lower than that of the first thermoplastic resin, and uses a multi-layer inflation method and a multi-layer T method.
Before and / or after cutting a multilayer film of at least two layers produced by extrusion molding such as a die method, the stretching ratio is 1.1 to 15 times, preferably 3 to 10 times in the machine direction and / or the transverse direction, uniaxially or biaxially. A multi-layer stretched tape (FIG. 5) is produced by axially orienting and cutting, and the multi-layer stretched tape is laminated or woven at right angles or oblique directions with respect to the orientation axis and heat-fixed to form a nonwoven fabric (B) or a woven fabric ( C). The most preferable method of heat fixing is a method of heat fixing continuously while winding it around a heating cylinder drum.

As a specific method for producing the above-mentioned multilayer stretched film or tape, first, a first thermoplastic resin and a second thermoplastic resin having a melting point lower than that of the first thermoplastic resin are used, and a multilayer inflation method, a multilayer inflation method, and a multilayer inflation method are used. By extrusion molding such as T-die method, a film having at least two layers is produced. Next, the film is stretch-oriented. The orientation ratio (stretching ratio) is 1.1 to 15 times, but it is preferable to orient in multiple stages in order to prevent uneven drawing. For example, the first stage is 1.1 to 8 times, preferably 5 to
The primary orientation is made 7 times, and further, in the second and subsequent stages, the draw ratio is 5 to 15 times, preferably 6 to 10 times the initial dimension.
Next, the third and third orientations are performed. If the stretching ratio of the multilayer uniaxially stretched film is less than 1.1 times, the mechanical strength of the woven fabric or the nonwoven fabric is not sufficient. On the other hand, when the draw ratio exceeds 15 times, it is difficult to draw by a usual method, and there arises a problem that an expensive device is required. In the case of stretched tape, the above film should be 3 mm to 50 mm wide, preferably 5 mm
After cutting into a tape shape of -30 mm, it may be uniaxially oriented by rolling and / or stretching in the longitudinal direction, or may be cut into a tape shape after being uniaxially oriented.

The orientation method may be either a roll rolling method or a roll stretching method, but in the stretching method, a pseudo uniaxial stretching method is particularly preferable. The rolling method referred to in the present invention is
The thermoplastic resin film is passed between two heating rolls having a gap smaller than its thickness, compressed at a temperature lower than the melting point (softening point) of the resin film, and the length is expanded by the decrease in thickness. Say how to do. Further, the quasi-uniaxial stretching method, a thermoplastic resin film is passed between a low-speed roll and a high-speed roll (proximity roll) with a roll gap as small as possible, the shrinkage in the width direction is suppressed as small as possible, and only the thickness is mainly This is a method of reducing and stretching. When the width of the unstretched film is W ′, the width of the uniaxially stretched film is W, and the stretching ratio is V, X is ^{calculated from} the following formula X = 1- (V ^−1/2 ) × (W ′ / W). Is an index indicating the quasi-uniaxial property of stretching,
The larger the value of X (0 <X <1), the higher the quasi-uniaxial stretchability.

The thickness ratio of the first thermoplastic resin layer to the second thermoplastic resin layer of the multilayer film is not particularly limited, but when the second thermoplastic resin having a low melting point is used as the adhesive layer. Has a thickness of 50% or less, preferably 40% or less, of the total thickness of the multilayer film. If the thickness of the second thermoplastic resin layer is 5 μm or more, various physical properties such as adhesive strength at the time of heat fusion are satisfied, but preferably 10 to 10
It is selected from the range of 0 μm.

The high melting point first thermoplastic resin used in the present invention includes high and medium density polyethylene, polypropylene, polybutene-1, poly-4-methylpentene-1,
Homopolymers of α-olefins such as polyhexene-1, polyolefins such as copolymers of α-olefins such as propylene-ethylene copolymer, polyamides, polyesters, polycarbonates, crystalline resins such as polyvinyl alcohol, and the like. .

The low melting second thermoplastic resin used in the present invention includes high-medium-low density polyethylene, linear low density polyethylene, ultra low density polyethylene, ethylene-vinyl acetate copolymer, ethylene-acrylic. Acid copolymers, ethylene-methacrylic acid copolymers, ethylene-ethyl acrylate copolymers and other ethylene-acrylic acid ester copolymers and ethylene-methacrylic acid ester copolymers, ethylene-maleic acid or its ester copolymers Examples thereof include a polymer; a propylene-based polymer such as polypropylene and a propylene-ethylene copolymer; a polyolefin modified with an unsaturated carboxylic acid; and a copolyester. For manufacturing reasons, the difference in melting point from the first thermoplastic resin must be at least 5 ° C., preferably 10 ° C.
~ 50 ° C.

Specific resin constitutions of the multilayer stretched film include high density polyethylene (HDPE) / low density polyethylene (LDPE) and LDPE / HDPE / LDP.
E, HDPE / ethylene-vinyl acetate copolymer (EV
A), EVA / HDPE / EVA, polypropylene (P
P) / propylene-ethylene copolymer (PEC), PE
C / PP / PEC, polyester (PEs) / copolyester (CPEs), CPEs / PEs / CPEs, etc. are mentioned.

The fibrous random nonwoven fabric (D) used in the present invention includes those in which multifilaments are accumulated and those in which staple fibers are accumulated. More preferably, it is a fibrous random nonwoven fabric using a high melting point first fiber and a low melting point second fiber. Specific examples of the fibrous random nonwoven fabric (D) include a random nonwoven fabric and a core obtained by accumulating a mixture of a high melting point first fiber or its web and a low melting point second fiber or its web or an adhesive resin. Random nonwoven fabric obtained by accumulating composite fibers composed of high-melting first fibers forming a component and low-melting second fibers forming a sheath component, high-melting first
A non-woven fabric obtained by accumulating side-by-side conjugate fibers composed of the above-mentioned fibers and a second fiber having a low melting point, a random non-woven fabric obtained by accumulating meltblown filaments, a synthetic pulp and / or fibers having a high melting point or a web thereof. Random non-woven fabrics and the like obtained by making paper with low melting point synthetic pulp and / or fibers or a web thereof are included.

Examples of the first fiber having a high melting point include synthetic fibers such as high density polyethylene, polypropylene, polyester, polyamide and polyacryl, and natural fibers such as cotton, wool and hemp. If necessary, mineral fibers such as rock wool, metal fibers, glass fibers and whiskers may be used in combination.

The low melting second fiber is selected from fibers of a thermoplastic resin having a melting point lower than that of the high melting first fiber, and uses the low melting second thermoplastic resin. But it's okay.

The adhesive fiber or the web (E) thereof used in the present invention is preferably a composite fiber or a web thereof using a first fiber having a high melting point and a second fiber having a low melting point, and a core thereof. Examples include conjugate fibers such as type and parallel type.

Specific examples of the core-type or side-by-side conjugate fibers include high-density polyethylene (HDPE) / low-density polyethylene (LDPE), HDPE / ethylene-vinyl acetate copolymer (EVA), polypropylene (PP). /
Propylene-ethylene copolymer (PEC), PP / H
D, Polyester (PEs) / Copolyester
Various combinations of (CPEs), PEs / HDPE, PEs / PP, polyamide (PA) / PP, PA / HDPE, etc. are mentioned, and the products are “NBF”, “ES fiber”, “UC fiber”, Examples include "Elves" and "Sunmore".

The non-woven fabric (F) comprising a mixture of the fibrous random non-woven fabric of the present invention and the adhesive fiber or its web is a mixture of the fibrous random non-woven fabric (D) and the adhesive fiber or its web (E). The non-woven fabric comprising the adhesive fiber or the web (E) thereof may be entwined at the same time when the fibrous random non-woven fabric is manufactured.

An apparatus for producing a breathable reinforced nonwoven fabric will be described below with reference to the illustrated embodiment. FIG. 6 is a schematic process diagram showing one embodiment of the present invention. Codes 11 and 11 '
Is a means for supplying a breathable multilayer stretched nonwoven fabric of Group I or a woven fabric (hereinafter referred to as a nonwoven fabric), and represents a raw material obtained by winding a previously produced multilayer stretched nonwoven fabric. The supply means may be continuously connected to the manufacturing process of the multilayer stretched nonwoven fabric. Reference numeral 12 is a hopper for supplying the conjugate fiber,
Reference numeral 13 indicates a heating cylinder as a heating means for heat-sealing the integrated conjugate fibers, and reference numeral 14 indicates a winding means for the breathable reinforced nonwoven fabric. The breathable multilayer stretched nonwoven fabric is fed out from the raw material supply means 11, and the conjugate fiber previously filled in the hopper 12 is fed to the upper surface of the breathable multilayer stretched nonwoven fabric. The conjugate fibers accumulated on the moving breathable multilayer stretched nonwoven fabric are leveled by using the doctor knife 15, and at the downstream thereof, another breathable multilayer stretched nonwoven fabric is fed from the raw material feeding means 11 'to staple. Laminate on top of fiber. The formed laminate is passed through the heating cylinders of the heating means 13 and integrated by heat fusion to manufacture a breathable reinforced nonwoven fabric. The obtained breathable reinforced non-woven fabric is taken up by the winding means 14 as a wound product.

FIG. 7 is a schematic process diagram showing another embodiment of the present invention. 6 is the same as the example of the apparatus shown in FIG. 6 except that one additional breathable multilayer stretched nonwoven fabric supply means 30 is added instead of the hopper and the doctor knife. That is, reference numerals 10, 20 and 30 represent a supply means of the breathable multilayer stretched nonwoven fabric or the fibrous random nonwoven fabric, reference numeral 40 represents a heating cylinder which is a heating means for heat-sealing the nonwoven fabric, and reference numeral 50. Shows a means for winding a breathable nonwoven fabric. The means for supplying the breathable multilayer stretched membrane or the fibrous random nonwoven fabric denoted by reference numerals 10, 20 and 30 is as follows.
When there are only one type of multilayer stretched nonwoven fabric and one type of random nonwoven fabric, the supply means 10 and 20 are used, and when sandwiching the random nonwoven fabric between the multilayer stretched nonwoven fabrics, reference number 1 is used.
The supply means 0 and 20 are for a multilayer stretched nonwoven fabric, and reference numeral 30
As the means for supplying the random nonwoven fabric. When supplying a multilayer stretched non-woven fabric between random non-woven fabrics, reference numeral 10,
The supply means 20 may be used for a random nonwoven fabric, and the reference numeral 30 may be used as a supply means for a multilayer stretched nonwoven fabric. The above
It is desirable that the second thermoplastic resin and the second fiber forming the adhesive layer of the group I non-woven fabric and the group II non-woven fabric or fibers or the web thereof are the same type of resin in order to improve the adhesive strength. In addition, it is preferable to use polyvinyl alcohol fiber or acrylic fiber as the conjugate fiber as the agricultural covering material having the heat retaining property.

The present invention will be described below with reference to examples. <Example 1> [Resin used] First thermoplastic resin: high-density polyethylene (MFR 1.0 g / 10 min, density 0.956 g / cm ³ , melting point 1
29 ° C; Trade name: Nisseki Staflen E710, Nippon Petrochemical Co., Ltd.
Second thermoplastic resin: low density polyethylene (MFR 3.0 g / 10 min, density 0.924 g / cm ³ , melting point 1
09 ° C; trade name: Nisseki Lexron F30, manufactured by Nippon Petrochemical Co., Ltd. [Production Example of Nonwoven Fabric Consisting of Multilayer Stretched Film] The above high-density polyethylene (HDPE) is used as an inner layer by a multilayer water-cooling inflation method, and both surfaces The above low-density polyethylene (LDPE) is placed on the
DPE) / 100 μm (HDPE) / 15 μm (LDP
E), a split fiber non-woven fabric A having a three-layer structure with a basis weight of 18 g / m ² and a width of 1 m (drawing ratio: 8 times) was produced. In the apparatus of FIG. 7, the split fiber nonwoven fabric A is used as the original fabric of reference numeral 10,
A random nonwoven fabric composed of 50% by weight of rayon fiber and 50% by weight of ES fiber (a composite fiber made of polyester resin in the core and low density polyethylene in the sheath) was used as the original fabric of reference numeral 20, and each was supplied at a line speed of 40 m / min. And heating temperature 105-125 ° C and pressure 2.0
Heat fusion was performed at 4.0 kg / cm ² . The product has a basis weight of 35 g / m ² , a thickness of 110 μm, and a tensile strength (according to JIS L-1068) 17
/ 15kg / 50mm (length / width), tensile elongation (JISL-106
8) 20/23% (length / width), tear strength (JIS P
It was 0.5 / 0.4 kg (vertical / horizontal).

Example 2 In FIG. 6, split fiber non-woven fabric A is used as the original fabric of reference numeral 11, 50% by weight of rayon fiber and 50% by weight of ES fiber (a composite fiber having a polyester resin core and a polyethylene sheath). The staple fiber consisting of and is filled in the hopper 12 and supplied so that the basis weight of the product is 35 g / m ² , and the doctor knife 15 is used for leveling and heat is applied without using the material 11 '. Fused. Product thickness 120 μm, tensile strength (JIS
L-1068) 13 / 11kg / 50mm (length / width), tensile elongation (JIS L-1068) 18/20% (length / width)
Horizontal), tear strength (JIS P-8116 compliant) 0.4 /
It was 0.3 kg (length / width).

<Example 3> While running a split fiber nonwoven fabric A '(basis weight of 23 g / m ² ) produced in the same manner as in Example 1, the fiber or its web was directly spun out from the spinneret (melt blow). Method) A single fiber group made of high-density polyethylene is supplied and accumulated on the split fiber nonwoven fabric B, and then the obtained multilayer stretched nonwoven fabric and a laminated body composed of the accumulated fibers or webs thereof are passed through a heating roll to generate heat. Fusing was performed to obtain a breathable reinforced nonwoven fabric. No separation occurred between the multilayer stretched nonwoven fabric A ′ and the fibrous random nonwoven fabric.

<Embodiment 4> Reference numeral 1 in the apparatus of FIG.
The split fiber nonwoven fabric A of Example 1 was used as the 0 and 20 webs, and 50 weight% of rayon fiber and ES fiber (a conjugate fiber having a polyester resin core and a polyethylene sheath core) 50 weight% as the web roll 30. Using a random nonwoven fabric consisting of 10% and
It is supplied at 0 m / min, heat-fused at a heating temperature of 105 to 125 ° C. and a pressure of 2.0 to 4.0 kg / cm ² , and a fibrous random non-woven fabric is sandwiched between the split fibrous non-woven fabrics A / A breathable reinforced nonwoven fabric having a three-layer structure of fibrous random nonwoven fabric / split fiber nonwoven fabric A was obtained. The product has a basis weight of 53 g / m ² ,
No separation was observed between the split fiber nonwoven fabric A and the fibrous random nonwoven fabric.

<Embodiment 5> Reference numeral 1 in the apparatus of FIG.
Random non-woven fabric composed of 50% by weight of rayon fiber and 50% by weight of ES fiber (composite fiber consisting of polyester resin in core and polyethylene in sheath) was used as the original fabric of 0 and 20, and split fiber nonwoven fabric was used as the original fabric of reference numeral 30. make use of,
Each is supplied at a line speed of 40 m / min, heat-fused at a heating temperature of 105 to 125 ° C. and a pressure of 2.0 to 4.0 kg / cm ² , and a fibrous random in which a split fiber nonwoven fabric A is sandwiched between fibrous random nonwoven fabrics. A breathable reinforced nonwoven fabric having a three-layer structure of nonwoven fabric / split fiber nonwoven fabric A / fibrous random nonwoven fabric was obtained. The product had a basis weight of 52 g / m ² , and no separation occurred between the split fiber nonwoven fabric A and the fibrous random nonwoven fabric.

<Embodiment 6> Reference numeral 1 in the apparatus of FIG.
A fibrous non-woven fabric A obtained by accumulating single fiber groups made of high-density polyethylene directly spun from the spinneret (melt-blown method) as a raw fabric of 0 and a fibrous non-woven fabric of 20 as a raw fabric. Using the rolled oriented fibrous random nonwoven fabric, ES fiber as a raw material of reference numeral 30, each is supplied at a line speed of 40 m / min, a heating temperature of 105 to 125 ° C., a pressure of 2.0 to 4.0 kg / cm. Heat fused at ² . No separation was observed between the split fiber nonwoven fabric A and the fibrous random nonwoven fabric.

[0030]

As described in detail above, since the breathable reinforced nonwoven fabric of the present invention is easily adhered by heat fusion, it has high mechanical strength and can be manufactured at low cost. In addition, since the fibrous random nonwoven fabric has high mechanical strength, it is possible to reduce the thickness of the nonwoven fabric. These breathable reinforced non-woven fabrics are used as agricultural covering materials, golf course green covers, filters, drainage bags, various bags, oil adsorbent materials, agricultural and horticultural materials such as flower wraps, house wraps, civil engineering and construction materials, and logistics materials. Suitable for packaging materials, etc.

[Brief description of drawings]

FIG. 1 is a partial plan view of an example of a split fiber nonwoven fabric A of Group I of the present invention.

FIG. 2 is a partially enlarged perspective view of a split fiber having a multilayer structure which constitutes the split fiber nonwoven fabric A.

FIG. 3 Nonwoven fabric B comprising a stretched tape of Group I of the present invention
It is a partial perspective view of an example.

FIG. 4 is a partial perspective view of an example of a woven fabric C made of the stretched tape of Group I of the present invention.

FIG. 5 is a partially enlarged perspective view of a stretched tape having a multi-layer structure that constitutes the non-woven fabric B and the woven fabric C.

FIG. 6 is a schematic process drawing showing an example of a method for producing a breathable reinforced nonwoven fabric.

FIG. 7 is a schematic process drawing showing another embodiment of the method for producing a breathable reinforced nonwoven fabric.

[Explanation of symbols]

 1 First Thermoplastic Resin Layer 2, 2'Second Thermoplastic Resin Layer 10, 11, 11 ', 20, 30 Raw Material Supplying Means 12 Hopper 13, 40 Heating Means 14, 50 Winding Nonwoven Fabric Means 15 Doctor knife A Split fiber nonwoven fabric B Stretched tape nonwoven fabric C Stretched tape woven fabric

─────────────────────────────────────────────────── ─── Continuation of the front page (51) Int.Cl. ⁵ Identification code Internal reference number FI technical display location D04H 13/02 7199-3B

Claims (6)

[Claims] 1. At least one non-woven fabric or woven fabric selected from the group I (A), (B) and (C) below, and group II (D), (E) and ( A breathable reinforced non-woven fabric comprising at least one non-woven fabric selected from among F), an adhesive fiber or a web thereof, which is heat-fused through a second thermoplastic resin layer. [Group I] (A) The first thermoplastic resin layer may have a first
Second with a lower melting point than thermoplastics of
Multi-layer uniaxial stretching consisting of laminated thermoplastic resin layers
A split-fiber nonwoven fabric obtained by laminating the mesh-like split-fiber film with the orientation axes of the split-woven film so as to intersect with each other; (B) One side or both sides of the first thermoplastic resin layer,
Second with a lower melting point than thermoplastics of
Multi-layer uniaxial stretching consisting of laminated thermoplastic resin layers
A non-woven fabric obtained by laminating tapes in a weft-latitude manner so that the orientation axes intersect with each other; (C) a first thermoplastic resin layer having a
Second with a lower melting point than thermoplastics of
Multi-layer uniaxial stretching consisting of laminated thermoplastic resin layers
Woven fabric obtained by weaving a tape so that the orientation axes cross each other; [Group II] (D) Fibrous random nonwoven fabric; (E) Adhesive fiber or web thereof; (F) Fibrous random nonwoven fabric and adhesive fiber Or a non-woven fabric made of a mixture with the web. 2. At least one non-woven fabric of the group I split fiber non-woven fabric (A), non-woven fabric (B) consisting of stretched tape and woven fabric (C) consisting of stretched tape, or both sides of the woven fabric,
At least one nonwoven fabric selected from the group II fibrous random nonwoven fabrics (D), adhesive fibers or webs thereof (E) and nonwoven fabrics (F) consisting of a mixture thereof, adhesive fibers or webs thereof; The breathable reinforced non-woven fabric according to claim 1, wherein the air-permeable reinforced non-woven fabric is formed by heat fusion through the second thermoplastic resin layer. 3. A group II fibrous random nonwoven fabric (D),
At least one non-woven fabric selected from adhesive fibers or webs thereof (E) and non-woven fabrics (F) consisting of a mixture thereof, on both sides of the adhesive fibers or their webs,
One kind of non-woven fabric or woven fabric selected from the group consisting of split fiber non-woven fabric (A), non-woven fabric (B) consisting of stretched tape and woven fabric (C) consisting of stretched tape, with the second thermoplastic resin layer interposed therebetween. The breathable reinforced non-woven fabric according to claim 1, wherein the breathable reinforced non-woven fabric is heat-fused. 4. A continuous supply of at least one non-woven fabric or woven fabric of the following group I non-woven fabric (A), non-woven fabric (B) made of drawn tape and woven fabric (C) made of drawn tape. And at least one non-woven fabric of group II fibrous random non-woven fabric (D), adhesive fiber or web thereof (E) and non-woven fabric (F) consisting of a mixture thereof, adhesive fiber or web thereof. , The group I non-woven fabric or woven fabric and the group II random non-woven fabric,
A method for producing a breathable reinforced nonwoven fabric comprising a step of laminating an adhesive fiber, a web thereof, or a nonwoven fabric made of a mixture thereof and heat-sealing the same, and a step of winding the heat-sealed breathable reinforced nonwoven fabric. [Group I] (A) The first thermoplastic resin layer may have a first
Second with a lower melting point than thermoplastics of
Multi-layer uniaxial stretching consisting of laminated thermoplastic resin layers
A split-fiber nonwoven fabric obtained by laminating the mesh-like split-fiber film with the orientation axes of the split-woven film so as to intersect with each other; (B) One side or both sides of the first thermoplastic resin layer,
Second with a lower melting point than thermoplastics of
Multi-layer uniaxial stretching consisting of laminated thermoplastic resin layers
A non-woven fabric obtained by laminating tapes in a weft-latitude manner so that the orientation axes intersect with each other; (C) a first thermoplastic resin layer having a
Second with a lower melting point than thermoplastics of
Multi-layer uniaxial stretching consisting of laminated thermoplastic resin layers
Woven fabric obtained by weaving a tape so that the orientation axes cross each other; [Group II] (D) Fibrous random nonwoven fabric; (E) Adhesive fiber or web thereof; (F) Fibrous random nonwoven fabric and adhesive fiber Or a non-woven fabric consisting of a mixture with the web; 5. A non-woven fabric or a woven fabric of at least one of a split fiber non-woven fabric (A) of group I, a non-woven fabric (B) made of a stretched tape and a woven fabric (C) made of a stretched tape is run, and both surfaces thereof are run. Supplying at least one non-woven fabric, adhesive fiber or web thereof selected from Group II fibrous random non-woven fabric (D), adhesive fiber or web thereof (E) and non-woven fabric (F) consisting of a mixture thereof. After that, thermal fusion is performed at a temperature not lower than the melting point of the second thermoplastic resin and not higher than the melting point of the first thermoplastic resin through the second thermoplastic resin layer. For manufacturing a reinforced nonwoven fabric. 6. A group II fibrous random nonwoven fabric (D),
At least one non-woven fabric selected from adhesive fibers or webs thereof (E) and non-woven fabrics (F) composed of a mixture thereof, on both sides of the adhesive fibers or webs thereof,
One kind of non-woven fabric or woven fabric selected from the group consisting of split fiber non-woven fabric (A), non-woven fabric (B) consisting of stretched tape and woven fabric (C) consisting of stretched tape is supplied, and the second thermoplastic resin layer Through the melting point of the second thermoplastic resin, the first
The method for producing a breathable reinforced nonwoven fabric according to claim 4, wherein heat fusion is performed at a temperature not higher than the melting point of the thermoplastic resin.