JP4957434B2 - Thermally adhesive spunbond nonwoven fabric and fiber product using the same - Google Patents

Description

  The present invention relates to a nonwoven fabric excellent in adhesiveness and a textile product using the same. More specifically, the present invention relates to a nonwoven fabric having excellent adhesion to a material made of polyester and a textile product using the same.

  In recent years, various adhesives have been used to bond materials used in packaging materials, clothing materials, and the like to different materials. Many of these are adhesives that bond materials together by curing adhesive components using liquid mixing and chemical reactions typified by one- and two-component curable adhesives. However, these adhesives have a great influence on the environment and production, such as deterioration of the working environment due to the use of a solvent and reduction in workability due to the time required for the curing reaction.

  Hot melt adhesives are also often used. The hot melt adhesive is applied to an object and solidifies after heating to bond with a different material. Compared with the adhesive, 1) no solvent is used, 2) it is cured in a short time, etc. Many. However, depending on the type, there are also points to be improved such as easy blocking and insufficient initial adhesive strength. Further, depending on the resin to be configured, it is not necessarily all-purpose because, for example, adhesiveness with a material made of polyester is not expected. In addition, these adhesives require special equipment.

JP-A-11-61622 Japanese Patent No. 2801555

  An object of the present invention is to solve the above-mentioned problems and provide a binder nonwoven fabric that can be easily and firmly adhered to a different material even at a low temperature and a fiber product using the binder nonwoven fabric.

  As a result of earnest research, the present inventors are a composite fiber composed of at least a first component and a second component, and the first component continuously forms at least 70% of the fiber surface in the length direction. The second component is composed of a resin having a melting point lower by 10 ° C. or more than the first component, and the volume ratio of the first component / second component is in the range of 10/90 to 90/10. The present inventors have found that the above-mentioned problems can be solved by a heat-adhesive spunbonded nonwoven fabric composed of fibers, and have completed the present invention based on this finding.

The present invention is constituted by the following.
[1] A fiber-formable thermoplastic resin which is a composite fiber composed of at least two components of a first component and a second component, and the first component is formed continuously in the length direction at least 70% of the fiber surface. The second component is composed of a resin having a melting point that is 10 ° C. or more lower than that of the first component, and the heat is composed of fibers in which the volume ratio of the first component / second component is in the range of 10/90 to 90/10. Adhesive spunbond nonwoven fabric.
[2] The heat-adhesive spunbonded nonwoven fabric according to [1], wherein the second component is a thermoplastic elastomer composed of an ethylene-α-olefin copolymer.
[3] The second component is an ethylene-α-olefin copolymer composed of ethylene and an α-olefin having 3 to 20 carbon atoms, and has a molecular weight distribution (Mw / Mn) determined by gel permeation chromatography (GPC). The heat-adhesive spunbond nonwoven fabric according to [2], wherein the ethylene-α-olefin copolymer is an ethylene-α-olefin copolymer that is 3.5 or less and satisfies the following a) to c).
a) Density is 0.90 g / cm ³ or less b) Melt flow rate ratio (I ₁₀ / I ₂ ) is 6 or more.
c) The ratio (I ₁₀ / I ₂ ) between the molecular weight distribution (Mw / Mn) and the melt flow rate is in the relationship of the following formula.
4.63 ≦ (I ₁₀ / I ₂ ) − (Mw / Mn)
[4] The ethylene-α-olefin copolymer is an ethylene-α-olefin copolymer in which at least one of α-olefins having 3 to 20 carbon atoms is branched uniformly. [2] or [3 ] The heat-adhesive spunbond nonwoven fabric of description.
[5] A modified polyolefin graft-polymerized with a vinyl monomer containing at least one selected from an unsaturated carboxylic acid or an unsaturated carboxylic acid anhydride (hereinafter sometimes referred to as a modifying agent) The heat-adhesive spunbonded nonwoven fabric according to any one of [1] to [4], wherein the content of the modifier is 0.05 to 2 mol / kg).
[6] The heat-adhesive spunbond nonwoven fabric according to [5], wherein the first component modifier includes one or more of maleic anhydride, acrylic acid, or methacrylic acid.
[7] A laminate in which the heat-adhesive spunbond nonwoven fabric according to any one of [1] to [6] is sandwiched between at least two layers to be bonded, and the layer to be bonded is thermally bonded at the melting point of the first component or higher. Manufacturing method.
[8] The method for producing a laminate according to [7], wherein the thermal bonding with the adherend layer is performed at a temperature 20 to 80 ° C. higher than the melting point of the second component.
[9] A fiber product using the heat-adhesive spunbonded nonwoven fabric according to any one of [1] to [6].
[10] A laminate in which the heat-adhesive spunbonded nonwoven fabric according to any one of [1] to [6] is sandwiched between at least two layers to be bonded and thermally bonded at a temperature equal to or higher than the melting point of the first component.

  INDUSTRIAL APPLICABILITY According to the present invention, it is possible to provide a heat-adhesive nonwoven fabric that has strong adhesion to other materials, in particular, easy adhesion to a sheet made of a polyester material, and a laminate and a textile product using the same. The manufacturing method of can be provided.

The present invention will be described in detail below.
The adhesive spunbond nonwoven fabric of the present invention is composed of a composite fiber composed of at least a first component and a second component. This composite fiber is a fiber moldable thermoplastic resin in which the first component is formed continuously in the length direction at least 70% of the fiber surface, and the second component has a melting point lower by 10 ° C. or more than the first component. The first component / second component volume ratio is in the range of 10/90 to 90/10.

  The heat-adhesive spunbond nonwoven fabric of the present invention is a spunbond nonwoven fabric produced by a spunbond method. This spunbond method is a method of spinning a thermoplastic resin, and performing fiber opening, collection and entanglement in one step to form a nonwoven fabric. Unlike the usual method, the spunbond method does not have a drawing process, and therefore it is necessary to make a thin line at the time of spinning. Further, in an extended portion mainly using an air flow, for example, in a gun type or a slot type, contact between a metal portion and a thread occurs. For this reason, the fibers used in the spunbond method need not only have good spinnability, but also need to have less friction against the metal. Furthermore, the fiber opening property is necessary so that the fibers do not converge or aggregate when collected on a conveyor or the like.

  The spunbond nonwoven fabric of the present invention is composed of a composite fiber composed of at least a first component and a second component. The components constituting the composite fiber may be at least two components, and may be three components, four components, or more, but are two components in terms of ease of spinning nozzle structure, production cost, or productivity. It is preferable. Further, the first component is continuously arranged in the length direction at least 70% of the fiber surface. Further, the first component is a fiber moldable thermoplastic resin. The fiber moldable thermoplastic resin refers to a resin that can be easily produced into a fiber. Furthermore, it is also a resin that does not cause problems in the process of producing a spunbonded nonwoven fabric. Examples of these resins include high-density polyethylene, linear low-density polyethylene, polypropylene, polyethylene terephthalate, and nylon.

  The first component always forms a part (at least 70%) continuously in the length direction of the fiber surface. When the fiber-forming thermoplastic resin as the first component forms a continuous part in the length direction of the fiber surface, the spinnability, the friction resistance against the metal, and the opening property are improved.

On the other hand, the second component is a resin having a melting point lower by 10 ° C. or more than the first component. In most conjugate fibers, a component having a relatively high melting point is used as a core component, and only a sheath component having a low melting point is melted and bonded in many cases during thermal bonding. However, the second component (low melting point component) of the present invention does not necessarily need to be on the fiber surface, and only occupies 30% of the fiber surface at the maximum. From the viewpoint of spinnability, friction resistance, and spreadability, the second component preferably has a structure completely covered by the first component, which is a fiber moldable thermoplastic resin.
The heat-adhesive spunbond nonwoven fabric of the present invention is excellent in heat-adhesiveness with the adherend layer. In the heat bonding between the heat-adhesive spunbond nonwoven fabric and the adherend layer of the present invention, the two layers are superposed and heated at a temperature equal to or higher than the melting point of the first component while applying pressure as necessary, thereby heat-bonding the two. The heat bonding temperature is preferably 20 to 80 ° C., more preferably 40 to 80 ° C. higher than the melting point of the second component of the heat-bondable spunbond nonwoven fabric of the present invention. Since the second component used in the present invention has a high fluidity even at a relatively low temperature, the second component used in the present invention cannot be maintained in shape at the high heat bonding temperature as described above, and melt fluidizes. If the thermal bonding temperature at this time is sufficiently high so that the first component also melts and fluidizes, for example, a temperature higher than the melting point of the first component by 10 ° C. or more, both the first component and the second component are the original components. They melt and integrate with each other without retaining their shape. As a result, the second component can contribute as an adhesive medium at the interface with the adherend layer, thereby improving the adhesion with the adherend layer. Further, in the present invention, even at a heat bonding temperature at which the first component does not completely melt and flow, for example, at a temperature not exceeding 10 ° C. above the melting point of the first component, It has been confirmed that good thermal adhesiveness can be achieved. The reason for this is not clear, but part of the first component is torn, and the second component oozes to the fiber surface through the crack, which does not contribute to the adhesion to the adherend layer. It is estimated that.
In the present invention, the first component preferably has a relatively low melting point, preferably 110 to 170 ° C., and more preferably 110 to 170 ° C., based on the adhesive development mechanism in the present invention under the condition that fiber moldability is ensured. The melting point of the second component is preferably 60 to 100 ° C, more preferably 70 to 90 ° C, and the melting point of the first component is 10 ° C or higher than the melting point of the second component. A high value is preferable, and a high value of 20 to 40 ° C. is preferable in terms of adhesiveness, spinnability, friction resistance, and openability.
The heat-adhesive spunbonded nonwoven fabric of the present invention can be laminated by thermal bonding by being sandwiched between other adherend layers such as other fiber aggregates or other sheets. Examples of the adherend layer include knitted fabrics, nonwoven fabrics, urethane foam, films, paper-like wool moldings, metal plates, wood plates, plastic plates, and the like. The industrial significance is great in terms of excellent adhesion to the material.

  The volume ratio of the first component and the second component of the present invention is preferably in the range of first component / second component = 10/90 to 90/10. The first component is preferably 10% by volume or more in order to secure the fiber moldability and facilitate the production of the spunbonded nonwoven fabric, and the second component is 10% by volume in order to ensure good thermal adhesion. This is because the above is preferable.

  A preferable resin used for the second component of the present invention includes an ethylene-α-olefin copolymer which is a copolymer of ethylene and α-olefin. Examples of the α-olefin, which is a comonomer used in the ethylene-α-olefin copolymer, include olefins having 3 to 20 carbon atoms. Specific examples thereof include 1-butene, 1-pentene, 1-hexene, 4 Examples thereof include copolymers with -methyl-1-pentene, 1-heptene, 1-octene, 1-nonene, 1-decene and the like. Among the α-olefins, 1-pentene, 1-hexene and 1-octene are particularly preferable. These α-olefins can be used singly or in combination of two or more.

The ethylene-α-olefin copolymer used in the second component of the present invention preferably has a molecular weight distribution (Mw / Mn) determined by gel permeation chromatography (GPC) of 3.5 or less, More preferably, it is 1.5-3.0. When an ethylene-α-olefin copolymer having a molecular weight distribution (Mw / Mn) within the above range is used, a non-woven fabric having good spinnability in the production process in the spunbond method and less stickiness can be obtained.

The ethylene-α-olefin copolymer used for the second component of the present invention is preferably substantially linear. Substantially linear means that the main chain of the polymer has 0.01 to 3 long chain branches per 1000 carbons, more preferably 0.01 to 1 long chain branches, particularly preferably It means having 0.05 to 1 long chain branch. Such an ethylene-α-olefin copolymer has a single melting point, similar to a conventional homogeneous polymer.

The ethylene-α-olefin copolymer used for the second component of the present invention preferably has a branch. Further, the branch is preferably a long chain branch. The above-mentioned long chain branching refers to a branched chain consisting of at least 6 carbons. This long-chain branch composed of 6 or more carbons uses 13C nuclear magnetic resonance (NMR) spectroscopy and Randall method ("Rev. Macromol. Chem. Phys.", C29 (2 & 3), pages 285-297). Can be quantified. When an ethylene-α-olefin copolymer having a long chain branch is used, a non-woven fabric having good spinnability in the production process in the spunbond method and less stickiness can be obtained.

It second component used ethylene -α- olefin copolymer of the present invention has a density (ASTMD1 505) is 0.90 g / cm ³ or less, preferably 0.85~0.90g / cm ³ Is preferred. By setting the density to the above 0.85 g / cm ³ or more, it is possible to sufficiently suppress the stickiness of the nonwoven fabric, and by setting the density to 0.90 g / cm ³ or less, the adhesive property of the nonwoven fabric targeted by the present invention. Can be kept enough.

The ethylene-α-olefin copolymer used for the second component of the present invention preferably has a melt flow rate ratio (hereinafter referred to as a melt flow ratio) (I ₁₀ / I ₂ ) of 6 or more. I ₁₀ indicates a melt flow rate (also referred to as melt index, defined in ASTM D1238) measured at a temperature of 190 ° C. and a load of 10 kg weight (98.07 N). I ₂ indicates a melt flow rate (ASTMD 1238) measured at a temperature of 190 ° C. and a load of 2.16 kg weight (21.18 N). The ratio of these two melt flow rate values is the melt flow ratio (I ₁₀ / I ₂ ). The larger the melt flow ratio (I ₁₀ / I ₂ ), the longer the long chain branching in the polymer. More preferably, the melt flow ratio (I ₁₀ / I ₂ ) is 7 or more, particularly preferably 8 or more. The upper limit of (I ₁₀ / I ₂ ) is generally 50 or less, preferably 30 or less, particularly preferably 20 or less.

The ethylene-α-olefin copolymer used for the second component of the present invention has a molecular weight distribution (Mw / Mn) and a melt flow ratio ((I ₁₀ / I ₂ ) of 4.63 ≦ (I ₁₀ / I). ₂ )-(Mw / Mn) The relational expression indicates that the melt flow ratio (I ₁₀ / I ₂ ) basically does not depend on the molecular weight distribution (Mw / Mn). This shows that in the case of ethylene-α-olefin copolymers having no long-chain branches and linear polyethylenes (LDPE) having non-uniform long-chain branches, the melt flow ratio (I ₁₀ / I ₂ ) indicates that the molecular weight distribution (Mw / Mn) must also be increased to increase the molecular weight distribution (Mw / Mn). Shows good processability and high Even in the case of shear extrusion, the pressure drop when passing through the spinneret becomes small, which is preferable.

The melt flow rate (ASTM D1238) I ₂ measured at a temperature of 190 ° C. and a load of 2.16 kg weight (21.18 N) of the ethylene-α-olefin copolymer used as the second component of the present invention is not particularly limited. However, it is 5-100 g / 10min from the point of workability, Preferably, it is 15-80.

The first component used in the present invention is preferably composed of a resin containing a modified polyolefin. The modifying agent used in the modified polyolefin is a vinyl monomer containing at least one selected from unsaturated carboxylic acids and acid anhydrides thereof, specifically selected from maleic anhydride, maleic acid, acrylic acid, methacrylic acid and the like. Unsaturated carboxylic acid or anhydride thereof is an essential component, and other vinyl monomers can also be included. As other vinyl monomers, general-purpose monomers having excellent radical polymerizability can be used.

Examples include styrenes such as styrene and α-methylstyrene, methacrylic acid esters such as methyl methacrylate, ethyl methacrylate, 2-hydroxyethyl methacrylate, dimethylaminoethyl methacrylate, or similar acrylic esters. Can do. The concentration of these vinyl monomers in the modified polyolefin is 0.05 to 2 mol / kg. Among them, the total amount of unsaturated carboxylic acid or acid anhydride is 0.03 to 2 mol / kg. The carboxylic acid or acid anhydride in the modified polyolefin is a component that directly contributes to adhesion, and other vinyl monomers help to adhere uniformly from the side by helping to uniformly disperse the acid in the polymer. It is a component that has an effect of imparting polarity to a polyolefin with poor adhesion and improving the affinity with other components, and indirectly contributes to adhesion.
Graft polymerization of these vinyl monomers onto the trunk polymer can be carried out in the usual manner. Using a radical initiator, an unsaturated carboxylic acid or acid anhydride and a vinyl monomer are mixed with a polyolefin to produce a random copolymer. It is possible to introduce a side chain consisting of a block copolymer by sequentially polymerizing different monomers.

As the trunk polymer of the modified polyolefin, polyethylene, polypropylene, polybutene 1 or the like is used. As the polyethylene, high density, linear low density, and low density polyethylene are used. These are copolymers with a homo or other α-olefin having a density of 0.90 to 0.97 g / cm ³ and a melting point of about 100 to 135 ° C. Polypropylene is a crystalline polymer having a melting point of 130 to 170 ° C., and is a copolymer with homo or other olefins. Polybutene-1 is a crystalline polymer having a melting point of 110 to 130 ° C., and is a copolymer with a homo- or other olefin. Among these polymers, polyethylene is preferable in consideration of the melting point range and ease of grafting reaction.

The modified polyolefin used as the first component is a single, and can be used as a mixture of two or more of the above modified polyolefins, or a mixture of the modified polyolefin and the trunk polymer. Even in the case of a mixture of different polymers, the content of the modifying agent in the polymer may be in the range of 0.05 to 2 mol / kg.

The amount of the graft polymerized modifier in the polyolefin can be calculated by measuring an infrared absorption spectrum. For example, when the modified polyolefin is a modified polyethylene obtained by graft-polymerizing polyethylene with maleic anhydride, the amount of the graft-modified modifier can be measured by the following operation.
Dissolve the modified polyethylene in boiling xylene, pour the solution into 3 times the amount of normal temperature acetone and cool well. The filtrate of this liquid is further washed with acetone and vacuum dried to obtain a powdery modified polyethylene from which unreacted maleic anhydride has been removed. The powder amount of maleic anhydride can be calculated by forming this powder into a film and measuring the Fourier transform infrared absorption spectrum using the powder.

  There is no limitation on the method for thermally bonding the heat-adhesive spunbond nonwoven fabric and the adherend layer, but it is preferable to perform heat-bonding at a melting point of the first component or higher. By processing at the melting point of the first component or higher, the adhesion with the adherend layer is improved, and the second component having a melting point lower than the first component by 10 ° C. or more can be sufficiently melted to exhibit the anchor effect. Adhesive strength can be maximized.

  In the present invention, various stabilizers, ultraviolet absorbers, thickening and branching agents, matting agents, coloring agents, flexibility imparting agents such as rubber, and other various improvers, provided that the effects of the present invention are not impaired. Etc. may be blended if necessary.

The basis weight of the heat-adhesive spunbonded nonwoven fabric of the present invention is not particularly limited, but is 5 to 50 g / m ² , preferably 10 to 20 g / m ² .

  Examples of textile products using the heat-adhesive spunbond nonwoven fabric of the present invention include disposable diapers, diapers, sanitary products, sanitary materials such as diaper covers, tapes, adhesive bandages, clothes, etc., as well as clothing interlinings and clothing Insulating materials, heat insulating materials, protective clothing, hats, masks, gloves, supporters, vibration absorbers, various filters such as air filters for clean rooms, blood filters, oil / water separation filters, electret filters that have undergone electret processing, separators, insulation materials, Coffee bags, food packaging materials, automotive ceiling skin materials, soundproof materials, base materials, cushion materials, speaker dustproof materials, air cleaner materials, insulator skins, backing materials, door trims, and other automotive parts, copying machine cleaning materials Various cleaning materials such as, carpet surface and back materials, agriculture , Wood drain material, shoe member, bag for members such as sports shoes skin, industrial sealing material, wiping material, does not it can be mentioned sheets, etc. is not limited to these.

  EXAMPLES Hereinafter, although an Example and a comparative example demonstrate this invention concretely, this invention is not limited to these Examples. The measurement results in the following examples and comparative examples were in accordance with the following method.

(I) Melting point Measured according to JIS K7122.
(Ii) Adhesive strength with other materials (peel strength)
Samples obtained in each Example and Comparative Example and samples to be adhered (other materials) were each cut into a size of 10 cm × 5 cm. A sample is sandwiched between two adherend samples, overlapped so that the four corners are aligned, and a heat seal elongated in the short side direction, that is, the width direction of the stacked sample is applied (heat seal area 1 cm × 5 cm). A heat seal tester TP-701 (trade name, manufactured by Tester Sangyo Co., Ltd.) was used as the heat seal device, and the heat seal conditions were a temperature of 140 ° C. (both up and down), a pressure of 0.4 MPa, and a pressurization time of 3 seconds. The bonded sample obtained by this method was opened from the short side of the other side of the heat-sealed side, and the tensile tester Autograph AG-G ( The product was fixed between chucks of a product name (manufactured by Shimadzu Corporation). The peel strength was measured at a pulling speed of 100 m / min, and the peel strength calculation method was based on JIS L1086-1983.

PP: polypropylene, MFR = 40 g / 10 min (230 ° C., 2.16 kg), melting point 161 ° C.
LLDPE1: linear low density polyethylene, MI = 20 g / 10 min (190 ° C., 2.16 kg), melting point 122 ° C., density 0.935 g / cm ³
LLDPE2: an ethylene-α-olefin copolymer (consisting of ethylene and 1-octene) obtained using a constrained geometric catalyst which is a kind of metallocene catalyst, MI = 30 g / 10 min (190 ° C., 2.16 kg), Melting point 76 ° C
a) Density 0.885 g / cm
b) Ratio of melt flow rate (I ₁₀ / I ₂ ) 7.9
c) Molecular weight distribution (Mw / Mn) 2.05, which satisfies the following formula.
4.63 ≦ (I ₁₀ / I ₂ ) − (Mw / Mn) = 5.85
HDPE: high density polyethylene, MI = 40 g / 10 min (190 ° C., 2.16 kg), melting point 132 ° C., density 0.955 g / cm
Modified PE1: modified polyethylene, MI = 9.6 g / 10 min (190 ° C., 2.16 kg), polymer obtained by graft polymerization of maleic anhydride using high-density polyethylene as a backbone polymer (modifier content = 1 mol / kg)
Modified PE2: Modified polyethylene, MI = 2 g / 10 min (190 ° C., 2.16 kg), polymer obtained by graft polymerization of maleic anhydride using high-density polyethylene as a backbone polymer (modifier content = 1 mol / kg)

Example 1
The first component and the second component were prepared by the spunbond method using the resin described in Example 1 in Table 1. Specifically, according to the conditions shown in Table 1, the respective resins were put into two extruders, and a spinneret having a concentric sheath-core cross section was used, and the cross-sectional volume ratio of the first component / second component was used. Is adjusted to 50/50, the composite fiber group discharged from the spinneret is introduced into the air soccer and index stretched to obtain 3.3 dtex long fiber, and then discharged by the air soccer. After charging the long fiber group with the same charge by the charging device, the fiber is collided with the reflector and opened, and the long fiber group is opened on an endless net-like conveyor with a suction device on the back. It was collected as a web and point bonded with an embossing roll (convex part) / flat roll having a linear pressure of 80 N / mm and a crimping area ratio of 15% to obtain a spunbonded nonwoven fabric. A peel test was performed on the obtained spunbonded nonwoven fabric using a polyester spunbonded nonwoven fabric as the material to be bonded. The results are shown in Table 1. It was a spunbonded nonwoven fabric with high peel strength and excellent adhesion performance.

Example 2
A nonwoven fabric was obtained in the same manner as in Example 1 except that the resin of Example 2 was used for the first component and the second component. A peel test was performed on the obtained spunbonded nonwoven fabric using a polyester spunbonded nonwoven fabric as the material to be bonded. The results are shown in Table 1. It was a spunbonded nonwoven fabric with high peel strength and excellent adhesion performance.

Example 3
Nonwoven fabric in the same manner as in Example 1 except that the resin of Example 3 was used for the first component and the second component, and the gear pump was adjusted so that the cross-sectional volume ratio of the first component / second component was 90/10. Got. A peel test was performed on the obtained spunbonded nonwoven fabric using a polyester spunbonded nonwoven fabric as the material to be bonded. The results are shown in Table 1. It was a spunbonded nonwoven fabric with high peel strength and excellent adhesion performance.

Example 4
Nonwoven fabric in the same manner as in Example 1 except that the resin of Example 4 was used for the first component and the second component, and the gear pump was adjusted so that the cross-sectional volume ratio of the first component / second component was 10/90. Got. A peel test was performed on the obtained spunbonded nonwoven fabric using a polyester spunbonded nonwoven fabric as the material to be bonded. The results are shown in Table 1. It was a spunbonded nonwoven fabric with high peel strength and excellent adhesion performance.

Example 5
Nonwoven fabric in the same manner as in Example 1 except that the resin of Example 5 was used for the first component and the second component, and the gear pump was adjusted so that the cross-sectional volume ratio of the first component / second component was 60/40. Got. A peel test was performed on the obtained spunbonded nonwoven fabric using a polyester spunbonded nonwoven fabric as the material to be bonded. The results are shown in Table 1. It was a spunbonded nonwoven fabric with high peel strength and excellent adhesion performance.

Example 6
Nonwoven fabric in the same manner as in Example 1 except that the resin of Example 6 was used for the first component and the second component, and the gear pump was adjusted so that the cross-sectional volume ratio of the first component / second component was 40/60. Got. A peel test was performed on the obtained spunbonded nonwoven fabric using a polyester spunbonded nonwoven fabric as the material to be bonded. The results are shown in Table 1. It was a spunbonded nonwoven fabric with high peel strength and excellent adhesion performance.

Example 7
Nonwoven fabric in the same manner as in Example 1 except that the resin of Example 7 was used for the first component and the second component, and the gear pump was adjusted so that the cross-sectional volume ratio of the first component / second component was 50/50. Got. A peel test was performed on the obtained spunbonded nonwoven fabric using a polyester spunbonded nonwoven fabric as the material to be bonded. The results are shown in Table 1. It was a spunbonded nonwoven fabric with high peel strength and excellent adhesion performance.

Example 8
Using the resin of Example 8 for the first component and the second component, adjusting the gear pump so that the sectional volume ratio of the first component / second component is 50/50, a nozzle having a parallel sectional shape A nonwoven fabric was obtained in the same manner as in Example 1 except that it was used. A peel test was performed on the obtained spunbonded nonwoven fabric using a polyester spunbonded nonwoven fabric as the material to be bonded. The results are shown in Table 1. It was a spunbonded nonwoven fabric with high peel strength and excellent adhesion performance.

Comparative Example 1
Nonwoven fabric in the same manner as in Example 1 except that the resin of Comparative Example 1 was used for the first component and the second component, and the gear pump was adjusted so that the cross-sectional volume ratio of the first component / second component was 50/50. Got. A peel test was performed on the obtained spunbonded nonwoven fabric using a polyester spunbonded nonwoven fabric as the material to be bonded. The results are shown in Table 1. Since polypropylene having a melting point higher than that of the first component was used as the second component, it was a spunbonded nonwoven fabric having low peel strength and poor adhesion performance.

Comparative Example 2
Nonwoven fabric in the same manner as in Example 1, except that the resin of Comparative Example 2 was used for the first component and the second component, and the gear pump was adjusted so that the cross-sectional volume ratio of the first component / second component was 50/50. Got. A peel test was performed on the obtained spunbonded nonwoven fabric using a polyester spunbonded nonwoven fabric as the material to be bonded. The results are shown in Table 1. Since polypropylene having a melting point higher than that of the first component was used as the second component, it was a spunbonded nonwoven fabric having low peel strength and poor adhesion performance.

  INDUSTRIAL APPLICATION This invention can be utilized for the technical field regarding a nonwoven fabric and a textile product using the same. More specifically, it can be used as a nonwoven fabric having excellent adhesiveness and a textile product using the same.

Claims (9)

A composite fiber composed of at least two components of a first component and a second component, wherein the first component is a fiber moldable thermoplastic resin in which at least 70% of the fiber surface is continuously formed in the length direction. The component is composed of a thermoplastic elastomer composed of an ethylene-α-olefin copolymer having a melting point 10 ° C. lower than the first component, and the volume ratio of the first component / second component is from 10/90 to 90 / A heat-adhesive spunbond nonwoven fabric composed of fibers in the range of 10. The second component is an ethylene-α-olefin copolymer composed of ethylene and an α-olefin having 3 to 20 carbon atoms, and the molecular weight distribution (Mw / Mn) determined by gel permeation chromatography (GPC) is 3.5. a less, the ethylene -α- olefin copolymer, following a) to c) is an ethylene -α- olefin copolymer satisfying the claim 1, wherein the heat-adhesive spunbonded nonwoven fabric.
a) Density is 0.90 g / cm ³ or less b) Melt flow rate ratio (I ₁₀ / I ₂ ) is 6 or more.
c) The ratio (I ₁₀ / I ₂ ) between the molecular weight distribution (Mw / Mn) and the melt flow rate is in the relationship of the following formula.
4.63 ≦ (I ₁₀ / I ₂ ) − (Mw / Mn) The heat according to claim 1 or 2 , wherein the ethylene-α-olefin copolymer is an ethylene-α-olefin copolymer in which at least one of C3-C20 α-olefins is uniformly branched. Adhesive spunbond nonwoven fabric. Modified polyolefin (modified agent content) graft-polymerized with a vinyl monomer containing at least one selected from unsaturated carboxylic acids or unsaturated carboxylic acid anhydrides (hereinafter sometimes referred to as modifying agents) The heat-adhesive spunbonded nonwoven fabric according to any one of claims 1 to 3 , comprising 0.05 to 2 mol / kg). The heat-adhesive spunbonded nonwoven fabric according to claim 4 , wherein the first component modifier comprises one or more of maleic anhydride, acrylic acid, or methacrylic acid. A method for producing a laminate in which the heat-adhesive spunbonded nonwoven fabric according to any one of claims 1 to 5 is sandwiched between at least two adherend layers, and the adherend layer is thermally bonded at a temperature equal to or higher than the melting point of the first component. The manufacturing method of the laminated body of Claim 6 which performs heat bonding with a to-be-adhered layer at 20-80 degreeC temperature higher than melting | fusing point of a 2nd component. A textile product using the heat-adhesive spunbonded nonwoven fabric according to any one of claims 1 to 5 . A laminate in which the heat-adhesive spunbonded nonwoven fabric according to any one of claims 1 to 5 is sandwiched between at least two layers to be bonded and thermally bonded at a temperature equal to or higher than the melting point of the first component.