JPH10130991A - Nonwoven fabric or woven or knitted fabric having thermally bonded crossing part of warp and weft and laminate using the same - Google Patents

Abstract

PROBLEM TO BE SOLVED: To obtain a nonwoven fabric/woven or knitted fabric excellent in bond strength, causing neither shifting nor deformation. SOLUTION: A lamination type or a sheath-core type yarn comprising a first polyolefin resin based resin 1 and a second low-melting polyolefin-based resin 2 is laminated, or woven or knitted and crossing parts of warp and weft are thermally bonded. The second polyolefin-based resin 2 is an ethylene/α-olefin copolymer which is obtained by copolymerizing ethylene with an α-olefin by using a metallocene catalyst and has 0.1-30g/10 minutes MFR, 0.87-0.93g/cm<3> density, 70-125 deg.C maximum peak temperature, 1.8-3 molecular weight distribution and 0.5-4g melt tension.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a nonwoven fabric or a woven or knitted fabric in which the weft intersection is thermally bonded using a heat-adhesive composite yarn comprising a high-melting component and a low-melting component, and a sheet-like material laminated on the nonwoven fabric or woven fabric. The present invention relates to a laminated body.

[0002]

2. Description of the Related Art Composite yarns composed of a high melting point component and a low melting point component include a laminated flat yarn having a low melting point component layer provided on both surfaces of an intermediate layer of a high melting point component, and a high melting point component. A core-sheath type monofilament composed of a core layer and a sheath layer having a low melting point component is well known. Flat yarn is, for example, disclosed in Japanese Utility Model Publication No. 53-49902, in which a woven fabric is woven using a stretch tape that has few longitudinal cracks at the time of stretching, can be easily thermocompression-bonded to other materials, and has little deterioration due to heat.
It is disclosed that the stretched tape is heated and heated at a temperature equal to or higher than the melting point or softening point of the low-melting point resin of the outer layer to thermally compress the stretched tape. Monofilaments are disclosed, for example, in JP-A-60-219.
Japanese Patent Application Publication No. 08-0838, discloses a monofilament having a heat-adhesive property and having excellent strength of a single yarn after heat bonding and excellent adhesive strength between the single yarns, a yarn using a low-melting-point polyolefin resin component on a sheath side and polypropylene on a core side. It is disclosed that a net is formed by a strip and the mesh is joined by heat fusion.

[0003] As described above, the composite yarn is subjected to a heat treatment after being formed into a woven or knitted fabric, whereby the low-melting-point component on the yarn surface is easily heat-fused at the intersection of the weft and strongly joined, and the high-melting-point component is drawn. The yarn or woven or knitted fabric is excellent in mechanical strength because the effect is not impaired, and a material that does not cause misalignment or deformation can be obtained. For example, carpet base cloth
JP-A-110083, JP-A-1-141179, JP-A-1-229866, JP-A-2-161915
JP-A-3-18309), adhesive tape base material (Japanese Patent Publication No. 7-94647, Japanese Utility Model Publication No. 6-4699)
No. 6, JP-A-2-99576), insect repellent net (JP-A-60-28547), mesh sheet for construction work (JP-A-4-281040, Japanese Utility Model Laid-Open No. 1-78)
No. 190), draining bags (Japanese Utility Model Publication No. 3-43268, Japanese Patent Publication No. 7-95963), base materials for flexible containers (Japanese Patent Application Laid-Open No. 1-124649, Japanese Patent Application Laid-Open No.
-77372), a coating material for agriculture (Japanese Unexamined Patent Publication No. 3-76)
513, and Japanese Utility Model Laid-Open No. 7-44394).

[0004] Among the thermoplastic resins used for the composite yarn, preferred examples of the high melting point component include high-density polyethylene, polypropylene, polyester, polyamide, and the like.
Suitable examples of the low melting point component include ultra-low density polyethylene, low density polyethylene, linear low density polyethylene, ethylene / vinyl acetate copolymer, ethylene / acrylate copolymer and the like. Is mentioned. In the combination of these high-melting point component and low-melting point component, if the difference in melting point or softening point is as small as less than 10 ° C., in order to obtain sufficient adhesive strength,
In some cases, heating for heat fusion gives thermal degradation to the high melting point component and cannot maintain sufficient strength.On the other hand, when the difference in melting point or softening point exceeds 30 ° C., it is difficult to set the temperature in co-extrusion, Delamination of the yarn in the stretching step is likely to occur, which may cause a problem in adhesiveness. In addition, when such a composite yarn is used for at least one of the warp yarns to form a sheet made of a nonwoven fabric or a woven or knitted fabric in which weft knitting or weaving and knitting are performed, and a weft knitting portion is heat-bonded, In order to increase the processing speed, it has been strongly desired to improve low-temperature heat sealability, adhesive strength, and the like.

[0005] Further, using such a composite yarn as at least a part of the warp yarn, the warp yarn is laminated or woven and knitted,
Non-woven fabric or woven or knitted fabric with a thermal intersection at the intersection of heat and heat, heat-fusible non-woven fabric, woven or knitted fabric, sheet material such as plastic film, or fiber sheet without heat-fusible nature or regenerated fiber Attempts have also been made to form a laminate by laminating different materials such as papers, woody sheet materials, and metal sheet materials. For example, in the production of a reinforced porous film having moisture permeability and waterproofness, a porous film formed by adding and mixing calcium carbonate powder with linear low density polyethylene (LLDPE), forming a film, and then stretching the film. Has been attempted to thermally bond the nonwoven fabric to the nonwoven fabric for the purpose of increasing the strength at the time of elongation, but when the heat bonding temperature increases, the pores of the porous film are closed, and the moisture permeability deteriorates and the function is lost. Therefore, a material that can be thermally bonded at a lower temperature has been demanded. As described above, not only heat bonding is possible without deteriorating the material of the heat-fusible sheet material, but also fiber sheets such as natural fibers and regenerated fibers, heat-fusible fibers, papers, and wood sheet materials. Even in the case of a heterogeneous material such as a metal sheet material, improvement in low-temperature heat-sealing property, hot-tack property, etc. is required so that heat bonding can be performed more quickly and a laminate having excellent bonding strength can be efficiently produced. I was

[0006]

SUMMARY OF THE INVENTION An object of the present invention is to provide a specific polyolefin-based resin having a high thermal adhesive strength constituted by using a composite yarn having a good adhesive strength between composite layers, and An object of the present invention is to provide a nonwoven fabric or a woven or knitted fabric having excellent sealing properties, and a laminated body obtained by laminating the nonwoven fabric or the woven or knitted fabric with another sheet-like material and firmly integrating them by heat fusion.

[0007]

Means for Solving the Problems The present inventors have conducted intensive studies in accordance with the above-mentioned objects, and as a result, completed the present invention by using an ethylene / α-olefin copolymer having specific properties. It is a thing. That is, the nonwoven fabric or the woven or knitted fabric of the present invention in which the weft intersections are heat-bonded is a laminate or a core of the first polyolefin resin and the second polyolefin resin having a lower melting point than the first polyolefin resin. A heat-adhesive composite yarn formed by covering the yarn body surface with the second polyolefin-based resin and covering at least a part of the yarn body is used as at least a part of the warp and the weft. In a non-woven fabric or a woven or knitted fabric in which warp yarns are laminated or knitted and the weft intersections are thermally bonded,
Is polyolefin resin of ethylene and α having 3 or more carbon atoms
-A resin containing 50 to 100% by weight of an ethylene / α-olefin copolymer having the following properties (a) to (e) obtained by copolymerizing an olefin with a metallocene catalyst: It is characterized by the following. (A) The melt flow rate (MFR) is 0.1 to 30 g /
10 min. (B) a density of 0.87 to 0.93 g / cm ³ (c) a maximum peak temperature (Tm) by DSC of 70 to 1
25 ° C. (d) Molecular weight distribution (Mw / Mn) is 1.8 to 3 (e) Melt tension is 0.5 to 4 g

A laminate according to another aspect of the present invention comprises:
The following (a) to (a) obtained by copolymerizing a first polyolefin-based resin with ethylene having a lower melting point than the first polyolefin-based resin and an α-olefin having 3 or more carbon atoms using a metallocene catalyst. (E) a yarn obtained by arranging a second polyolefin-based resin comprising an ethylene / α-olefin copolymer having the property of (e) in a laminated type or a core-sheath type, wherein the second polyolefin-based resin is a yarn A heat-bonding composite yarn formed by covering at least a part of the body surface is used for at least a part of the warp and the weft to laminate or woven the warp yarn and heat-bond the warp weft to a nonwoven fabric or a woven or knitted fabric. And a sheet-like material laminated by thermal bonding. (A) The melt flow rate (MFR) is 0.1 to 30 g /
10 min. (B) a density of 0.87 to 0.93 g / cm ³ (c) a maximum peak temperature (Tm) by DSC of 70 to 1
25 ° C. (d) Molecular weight distribution (Mw / Mn) is 1.8 to 3 (e) Melt tension is 0.5 to 4 g

[0009]

BEST MODE FOR CARRYING OUT THE INVENTION

[I] Raw Materials (1) First Polyolefin Resin The first polyolefin resin used in the present invention includes ultra-low density polyethylene, low density polyethylene, linear low density polyethylene, medium density polyethylene, and high density Α-olefin homopolymers such as polyethylene, polypropylene, polybutene-1, poly-4-methylpentene-1, etc., ethylene / propylene copolymer, ethylene / vinyl acetate copolymer, ethylene / ethyl acrylate copolymer, Copolymers such as maleic anhydride-modified polyolefin can be exemplified. Among these, it is preferable to use propylene homopolymers and copolymers. Also,
These polyolefin resins may be used alone or in combination of two or more. In the first polyolefin-based resin, an ethylene / α-olefin copolymer produced using a metallocene catalyst can be blended. The blending ratio of the ethylene / α-olefin copolymer produced using the metallocene catalyst blended in the first polyolefin-based resin is 0 to 30% by weight, preferably 5 to 30% by weight. By blending the ethylene / α-olefin copolymer produced using the metallocene catalyst, the adhesiveness between the warp yarns can be improved. However, if the blending ratio of the ethylene / α-olefin copolymer produced using the metallocene catalyst exceeds 30% by weight, the difference in melting point from the second polyolefin-based resin decreases, so that the intersection of the warp yarns is reduced. When the sheet is formed by heat bonding, the strength of the first polyolefin resin is undesirably reduced due to thermal deterioration.

(2) Second Polyolefin Resin The second polyolefin resin used in the present invention has the following physical properties obtained by copolymerizing ethylene and an α-olefin having 3 or more carbon atoms using a metallocene catalyst. It is important that the copolymer is an ethylene / α-olefin copolymer showing

Physical properties (a) The melt flow rate (MFR) is 0.1 to 30 g /
10 min, preferably 1 to 10 g / 10 min. That is, if the MFR is less than 0.1 g / 10 min, the moldability is poor, and if it exceeds 30 g / 10 min, mechanical strength such as impact resistance is reduced. (B) density of 0.87~0.93g / cm ^3, preferably 0.89~0.92g / cm ^3. That is, when the density is less than 0.87 g / cm ³ , the heat resistance decreases, and
If it exceeds g / cm ³ , the flexibility will decrease. (C) Maximum peak temperature (Tm) by DSC is 70 to 1
The temperature is 25 ° C, preferably 80 to 100 ° C. That is, Tm
If it is less than 70 ° C., the adhesive strength is reduced, and if it exceeds 125 ° C., the low-temperature heat sealability is poor. (D) The molecular weight distribution (Mw / Mn) is 1.8-3, preferably 2.2-3. That is, if Mw / Mn is less than 1.8, the moldability is poor, and if it exceeds 3, the impact resistance is reduced. (E) The melt tension is 0.5 to 4 g, preferably 1.0 to 3 g. That is, the melt tension is 0.5
If it is less than g, the molding stability of the composite yarn is inferior, and if it exceeds 4 g, the production is difficult.

Production The above - mentioned method for producing the ethylene / α-olefin copolymer is described in JP-A-58-19309 and JP-A-59-95.
No. 292, JP-A-60-35005, JP-A-60-35006, JP-A-60-35007, JP-A-60-35008, JP-A-60-35
It can be obtained by copolymerizing ethylene and an α-olefin using a metallocene catalyst described in, for example, US Pat. The metallocene catalyst is, for example, a catalyst composed of a metallocene compound represented by bis (cyclopentadienyl) zirconium dichloride (Cp ₂ ZrCl ₂ ) and methylaluminoxane (MAO) as cocatalysts. Examples of the metallocene compound include a cyclopentadienyl ring, a substituted cyclopentadienyl ring substituted with an alkyl group, a ligand having an indenyl ring and the like, hydrogen, a halogen atom, an alkyl group, and the like having zirconium, titanium, hafnium, and the like. A compound bonded to a transition metal, and specific examples thereof include bis (cyclopentadienyl) zirconium dichloride, bis (methylcyclopentadienyl) zirconium dichloride,
Bis (ethylcyclopentadienyl) zirconium dichloride, bis (cyclopentadienyl) titanium dichloride, bis (methylcyclopentadienyl) titanium dichloride, bis (ethylcyclopentadienyl) titanium dichloride, bis (cyclopentadienyl) Examples include hafnium dichloride, bis (methylcyclopentadienyl) hafnium dichloride, and bis (ethylcyclopentadienyl) hafnium dichloride. An aluminoxane or a boron compound or the like can be used as a co-catalyst for the metallocene compound. As the aluminoxane, usually, a chain or cyclic aluminoxane produced by bringing a trialkylaluminum into contact with water is preferable. Representative methylaluminoxane (MA
O) can be obtained by reacting trimethylaluminum with water. Further, the metallocene catalyst can be used by being supported on an inorganic oxide or the like.

The polymerization method is not particularly limited, and is produced by a high-pressure method, a solution method, a gas phase method, a slurry method, or the like. Examples of the α-olefin copolymerized with ethylene include α-olefins having 3 or more carbon atoms, such as propylene, 1-butene, 1-pentene, 1-hexene, 1-octene, and 4-methyl-1-pentene. No. Of these, one or two or more α-olefins are
It is advisable to copolymerize 50 to 50% by weight, preferably 10 to 30% by weight, with 50 to 95% by weight, preferably 70 to 90% by weight of ethylene.

[0014] Ethylene α-produced using a metallocene catalyst used as a second polyolefin resin
The olefin copolymer is usually used alone, but can be used as a mixture with another polyolefin resin. The blending ratio of the ethylene / α-olefin copolymer produced using the metallocene catalyst in the second polyolefin resin is 50 to 100% by weight, preferably 70 to 10% by weight.
0% by weight. Mixing this other polyolefin-based resin is preferable because the moldability can be improved. However, if the blending ratio of the ethylene / α-olefin copolymer produced using the metallocene catalyst is less than 50% by weight, the low-temperature heat sealability and the adhesive strength are poor,
In addition, since the melting point difference between the first polyolefin resin and the first polyolefin resin is reduced, the strength of the first polyolefin resin decreases due to thermal deterioration when a sheet is formed by thermally bonding the intersections of the warp yarns. It is not preferable.

The ethylene / α produced using the metallocene catalyst blended in the second polyolefin resin
-Polyolefin resins other than olefin copolymers include ultra-low density polyethylene, low density polyethylene, linear low density polyethylene, medium density polyethylene, high density polyethylene, polypropylene, polybutene-1, poly-4-methylpentene- Α-olefin homopolymers such as 1, ethylene / propylene copolymer, ethylene / vinyl acetate copolymer, ethylene / ethyl acrylate copolymer, and copolymers such as maleic anhydride-modified polyolefin. it can. Among these, it is preferable to use low-density polyethylene. These polyolefin resins may be used alone or in combination of two or more. In particular, it is important to use a second polyolefin resin having a melting point lower than that of the first polyolefin resin. The difference in melting point between the second polyolefin-based resin and the first polyolefin-based resin is preferably 20 to 100C, more preferably 30 to 80C.
It is desirable that The polyolefin resin used in the present invention includes an antioxidant, a lubricant, an ultraviolet absorber, a flame retardant, an antistatic agent, a pigment, an inorganic filler, and an organic filler within a range not departing from the spirit of the present invention depending on the purpose of use. You may mix additives, such as an agent, a crosslinking agent, a foaming agent, and a nucleating agent.

Next, the shape and the method of forming the composite yarn used in the present invention are not particularly limited.
For example, a composite flat yarn obtained by co-extruding and laminating by a multi-layer T-die flat method or an inflation method, or stretching and then heat-treating at least two layers of a film laminated by a sequential extrusion lamination method, And a composite monofilament obtained by stretching and exposing a filament extruded in a composite nozzle core-sheath type or a parallel type structure, and a composite multifilament obtained by converging and heating a low density composite filament. FIG. 1 shows a schematic view of a cross section of a three-layer flat yarn (a), a core-sheath monofilament (b), and a composite triple yarn (c).

As a method of forming a nonwoven fabric or a woven or knitted fabric by using the composite yarn, the composite yarn is used for at least a part of a warp and a weft to stack or woven knitting warp yarns and to form a weft knitting portion. Can be formed into a nonwoven fabric or a woven or knitted fabric. As a method for forming the above nonwoven fabric, a number of composite yarns or single yarns are arranged in parallel as warp to form one layer, and a plurality of composite yarns or single yarns are formed as wefts in parallel with each other. And another layer is formed, and the superimposed intersection of the two polymerized layers is thermally bonded. As a method for forming the woven fabric, the woven fabric can be woven using a known loom such as a circular loom, a Sulzer loom, and a water jet loom. Various shapes such as plain weave, twill weave and leno weave are applied as the weave structure. As a method for forming the knitted fabric, either horizontal knitting or warp knitting may be used, and specific examples include tricot knitting, Miranese knitting, and Russell knitting. The nonwoven fabric or the woven or knitted fabric of the present invention can be obtained by heat-bonding the woven or knitted fabric at the intersection.

The method for forming a laminate obtained by laminating a sheet-like material on the nonwoven fabric or woven or knitted fabric by thermal bonding is not particularly limited. Examples of the method include a method of forming a sheet-like material by a bonded nonwoven fabric manufacturing method and simultaneously performing thermal bonding, and a method of attaching a previously formed sheet-like material by thermal bonding. Examples of the sheet formed in advance include a fibrous nonwoven fabric, a woven or knitted fabric, a plastic film, papers, and a metal foil. Specific examples of the nonwoven fabric include a nonwoven fabric formed by a spun bond method, a melt blow method, a tow opening method, a burst fiber method, or the like. These sheet materials can be used in combination. These sheet materials may be laminated on the front and / or back surface of the nonwoven fabric or woven or knitted fabric.

[0019]

EXAMPLES Hereinafter, the present invention will be described specifically with reference to Examples and Comparative Examples, but the present invention is not limited to these Examples and Comparative Examples. <Physical property test method> 1. MFR: JIS-K6760 compliant 2. Density: JIS-K6760 compliant 3. Melting point (DSC method): based on JIS-K7172 Mw / Mn: GPC Waters 150 type, solvent O
4. DCB (orthodichlorobenzene) 135 ° C, column Tosoh GMHHR-H (S) 5. Melt tension: Measured by a melt tension tester manufactured by Toyo Seiki Co., Ltd. (measuring temperature 190 ° C.) 6. Tensile test: JIS-K6760 compliant Moisture permeability: JIS-Z208 compliant

<Resin used> Ethylene / α-olefin copolymer (Me-LL) using metallocene catalyst [MFR = 4.5 g / 10 min, density = 0.911 g]
/ Cm ³ , Mw / Mn = 2.1, Tm = 96 ° C., MT =
1.2 g] ・ Polypropylene (PP) [MFR = 5.0 g / 10 min, density = 0.905 g]
/ Cm ³ , Tm = 168 ° C.] High-density polyethylene (HDPE) [MFR = 1.0 g / 10 min, density = 0.950 g]
/ Cm ³ , Tm = 129 ° C.] Low density polyethylene (LDPE) [MFR = 3.2 g / 10 min, density = 0.922 g]
/ Cm ³ , Tm = 108 ° C.] Linear low density polyethylene (LLDPE) [MFR = 1.0 g / 10 min, density = 0.922 g]
/ Cm ³ , Tm = 122 ° C.] Ethylene / vinyl acetate copolymer (EVA) [MFR = 6.0 g / 10 min, density = 0.926 g]
/ Cm ³ , Tm = 98 ° C.]

Examples 1 and 2 and Comparative Examples 1 to 3 The resin compositions shown in Table 1 were used as the core layer resin and the outer layer resin, and each was charged into a two-series extruder, and was extruded from a circular die by coextrusion inflation molding. After being extruded and cooled in an amorphous state to form a three-layer film (weight ratio = outer layer 1: core layer 8: outer layer 1), it is cut into a tape shape and stretched at a draw ratio of 4 to 6 by a hot plate contact type stretching method. The film was uniaxially stretched by a factor of 2 and subjected to an annealing treatment to obtain a composite flat yarn having a fineness of 500 dr.

[0022]

[Table 1]

The composite flat yarn is used as a weft yarn, woven by a Sulzer-type loom with a plain weave structure having a driving density of 8.times.8 yarns / inch, and the heating temperature is changed by a hot roll pressing method to change the weft intersection. Into a woven fabric by heat bonding. The adhesive force of each of the sheets obtained in Examples 1 and 2 and Comparative Examples 1 to 3 at different intersections was measured. As shown in FIG. 2, both ends of the test piece were clamped by a lower chuck, three extended warps were clamped by an upper chuck, and the force required for thread removal was measured. The results are summarized in Table 2.

[0024]

[Table 2]

From the results shown in Table 2, the woven fabrics of Examples 1 and 2 are:
It was confirmed that sufficient adhesive strength was exhibited at a heating temperature near the melting point of the ethylene / α-olefin copolymer by the used metallocene catalyst. In addition, the composite flat yarns used in Comparative Examples 1 to 3 were fluffed and powdered due to rubbing between the guide and the yarn in the weaving process due to delamination between the core layer and the outer layer. In Examples 1 and 2, such a phenomenon was not observed.

Example 3 The woven fabric obtained in Example 2 and a porous film mainly composed of linear low-density polyethylene (thickness: 60 μm, moisture permeability: 3,200 g / m ² · 24 hr, microporous Maximum diameter 70μ
m) at a temperature of 96 ° C. with a thermocompression roll.
Under the above heating conditions to form a laminate. Table 3 shows the physical properties.

COMPARATIVE EXAMPLE 4 In a state where the woven fabric obtained in Comparative Example 1 and the porous film mainly composed of the linear low-density polyethylene used in Example 3 were laminated, 108 ° C. Under the heating conditions to form a laminate. Table 3 shows the physical properties.

[0028]

[Table 3]

From the results shown in Table 3, as compared with Example 3, in Comparative Example 4, as a result of thermal bonding at a high temperature, thermal contraction of the porous film began to occur and appearance of wrinkles was observed. Further, as the tensile strength decreased, the pores of the porous film were partially closed due to heat shrinkage, resulting in inferior moisture permeability of about 15%.

Example 4 A resin composition containing 80% by weight of an ethylene / α-olefin copolymer produced by a metallocene catalyst and 20% by weight of a low-density polyethylene was prepared by using a high-density polyethylene as a core layer resin. After being charged into two series of extruders and extruded and cooled in an amorphous state from a concentrically arranged multilayer nozzle to form a core-sheath filament (weight ratio = core layer 8: sheath layer 2), The film was drawn uniaxially in a longitudinal direction at a draw ratio of 6 by a hot-air oven drawing method, and annealed to obtain a composite monofilament having a fineness of 525 dr. This composite monofilament is used as a warp, a single layer made of high-density polyethylene is used as a weft, and a monofilament with a fineness of 825 dr is used as a weft. The sheet of Example 4 was obtained by heat bonding the parts at 96 ° C. Table 4 shows the physical properties.

COMPARATIVE EXAMPLE 5 The woven fabric of Comparative Example 5 was formed by weaving according to the same standard as in Example 4 except that 100% of low-density polyethylene was used as the resin for the sheath layer, and then thermally bonding the weft intersection at 108 ° C. I got Table 4 shows the physical properties.

[0032]

[Table 4]

From the results shown in Table 4, it was confirmed that in Comparative Example 5, the tensile strength was reduced by about 10% as compared with Example 4 due to the fact that the weft intersection was thermally bonded at 108 ° C.

Example 5 A laminate obtained by laminating the woven fabric obtained in Example 4 with a fibrous nonwoven fabric having a basis weight of 40 g / m ² produced by fiberizing polypropylene by a melt blow method was heated for 96 hours by a thermocompression roll. The laminate was formed by bonding under heating conditions of ° C. In this laminate, each member was firmly thermally bonded, and the monofilament sufficiently functioned as a reinforcing material.

[0035]

The first effect of the present invention is that the low melting point component constituting the adhesive layer in the composite yarn is composed of ethylene and carbon number 3
The composite yarn was formed as at least one of the warp yarns by mainly using an ethylene / α-olefin copolymer obtained by copolymerizing the above α-olefin with a metallocene catalyst. When a heat treatment is applied to the intersection of the warp and weft of a nonwoven fabric or a woven or knitted fabric, the low melting point component present on the yarn surface quickly softens or melts at the intersection at a lower temperature to form a perforated portion, It is possible to obtain a nonwoven fabric or a woven or knitted fabric which has excellent adhesive strength and does not cause misalignment or deformation without impairing the stretching effect of the core layer component. The second effect of the present invention is that when a sheet-like material such as a fibrous non-woven fabric, a woven or knitted fabric, a film, or paper is laminated on the non-woven fabric or the woven or knitted fabric, an adhesive layer component on the surface of the thread Is melted at a low processing temperature, so that when the mating member is a heat-fusible sheet-like material, it is possible to perform heat bonding while minimizing deterioration due to heating, and to use natural fibers that do not have heat-fusibility. Even in the case of a heterogeneous material such as fiber such as recycled fiber, paper, wood, and metal, heat bonding can be performed more quickly and efficiently, and in addition, a laminate having excellent bonding strength can be produced.

[Brief description of the drawings]

FIG. 1 is a cross-sectional view of a heat-adhesive composite yarn used in the present invention.
(B) is a core-sheath monofilament, and (c) is a composite triple thread.

FIG. 2 is a schematic explanatory view showing a measuring method of a testing machine used in an adhesion test measured in Examples of the present invention.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 1st polyolefin resin 2 2nd polyolefin resin

Claims (3)

[Claims] A first polyolefin-based resin and a second polyolefin-based resin having a lower melting point than the first polyolefin-based resin, wherein the first and second polyolefin-based resins are arranged in a laminated or core-sheath type; Laminating or weaving knitting warp yarns by using a heat-adhesive composite yarn formed by covering at least a part of the surface of the yarn with a polyolefin resin for at least a part of the warp and the weft, and thermally bonding the warp-weft intersection (A) obtained by copolymerizing ethylene with an α-olefin having 3 or more carbon atoms using a metallocene catalyst in the nonwoven fabric or woven or knitted fabric thus obtained.
A non-woven fabric or a woven or knitted fabric, wherein a crosswise intersection is heat-bonded, comprising a resin containing 50 to 100% by weight of an ethylene / α-olefin copolymer having the properties of (e). (A) The melt flow rate (MFR) is 0.1 to 30 g /
10 min. (B) a density of 0.87 to 0.93 g / cm ³ (c) a maximum peak temperature (Tm) by DSC of 70 to 1
25 ° C. (d) Molecular weight distribution (Mw / Mn) is 1.8 to 3 (e) Melt tension is 0.5 to 4 g 2. A method according to claim 1, wherein the first polyolefin resin is obtained by copolymerizing ethylene and an α-olefin having 3 or more carbon atoms using a metallocene catalyst.
The nonwoven fabric or woven or knitted fabric according to claim 1, wherein the resin is a resin containing 0 to 30% by weight of an ethylene / α-olefin copolymer having the property (e). (A) The melt flow rate (MFR) is 0.1 to 30 g /
10 min. (B) a density of 0.87 to 0.93 g / cm ³ (c) a maximum peak temperature (Tm) by DSC of 70 to 1
25 ° C. (d) Molecular weight distribution (Mw / Mn) is 1.8 to 3 (e) Melt tension is 0.5 to 4 g 3. A first polyolefin resin, ethylene having a lower melting point than said first polyolefin resin, and carbon number 3
A second polyolefin resin comprising an ethylene / α-olefin copolymer having the following properties (a) to (e) obtained by copolymerizing the above α-olefin with a metallocene catalyst: A heat-adhesive composite yarn formed by coating at least a part of the surface of the yarn with the second polyolefin-based resin, and forming at least a warp yarn and a weft yarn. A laminated body characterized in that a sheet-like material is laminated by thermal bonding to a nonwoven fabric or a woven or knitted fabric in which warp yarns are partially laminated or woven and knitted, and the crossed portions are thermally bonded. (A) The melt flow rate (MFR) is 0.1 to 30 g /
10 min. (B) a density of 0.87 to 0.93 g / cm ³ (c) a maximum peak temperature (Tm) by DSC of 70 to 1
25 ° C. (d) Molecular weight distribution (Mw / Mn) is 1.8 to 3 (e) Melt tension is 0.5 to 4 g