JPH08230084A - Skin sheet composite, its manufacture and cushion structure - Google Patents

Abstract

PURPOSE: To obtain a skin sheet composite good in air permeability, excellent in comfortability and touch and having good followability to a sheet shape by laminating a sheet like article and a skin sheet by bonding the fibers of both of them mutually at the respective surface layer parts at the lamination interface of them in a spot like state by an adhesive polymer having a specific m.p. CONSTITUTION: The sheet like article constituting a skin sheet composite along with a skin sheet has a structure wherein an aggregate of polyester staple fibers with 2-100 denier is used as a matrix and staple fibers having a thermoplastic polymer having an m.p. lower than that of polyester constituting the staple fibers by at least 40 deg.C on the surfaces thereof are dispersed in the staple fiber aggregate and the staple fiber aggregate is integrated by the m.p. of the thermoplastic polymer. In this composite, the sheet like article and the skin sheet are laminated by bonding the fibers of both of them in the respective surface layer parts in a substantially spot state at the lamination interface of them by an adhesive polymer having an m.p. lower than that of the thermoplastic polymer by at least 20 deg.C.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a lateral composite, a method for producing the composite, and a cushion structure. More specifically, the present invention relates to a side material composite having excellent properties as an interior material, particularly as an interior material for a vehicle, a method for producing the same, and a cushion structure.

[0002]

2. Description of the Related Art Conventionally, interior materials, especially interior materials for vehicles are
The cushioning material is often used as a stack of side structures that are formed by laminating urethane foam sheets. For example, in vehicles, particularly automobiles, cushioning interior materials are used for seat trims, door trims, ceilings, dash silencers, floor bahts, and the like.

The structure in which this urethane foam sheet is attached to the surface of the side fabric is specifically a surface of the urethane foam sheet coated with a resin back coating in order to prevent misalignment of the woven fabric and to prevent thread loss of the tricot. Melted at high temperature by flame or adhered to the back coat surface with an adhesive,
Next, it has a complicated structure in which the surface opposite to the adhesive surface of the urethane foam sheet is melted again at a high temperature due to a flame or an adhesive is used to bond a backing cloth such as tricot or spunbond having a low basis weight. In other words, the side fabric to which the urethane foam sheet is attached is seen from the surface, and the side fabric-back coat-
It has a structure of urethane foam sheet-back base cloth,
In many cases, the urethane foam forms a thin polymer layer on both sides of the urethane foam sheet due to melt adhesion. Therefore, it is extremely difficult to reduce the manufacturing cost of the structure because of the complexity of the manufacturing process for forming the multilayer structure at present.

Furthermore, although a urethane sheet is a relatively inexpensive material as a cushioning material, it has a low air permeability and tends to get stuffy when used for a long time, resulting in poor comfort. In addition, the urethane sheet deteriorates under the influence of light, moisture, gas, etc. when used for a long period of time, and the cushioning property gradually deteriorates. Further, since the back coat, the melt-bonded surface and the backing cloth are laminated, the structure in which the urethane sheets are bonded together lacks softness as a whole and cannot be said to have a satisfactory texture.
Further, when the sheet is covered, the shape of the sheet cannot be followed and it cannot be said to be a satisfactory material as a cover material.

The urethane sheet has another problem because it uses polyurethane as a raw material. That is, the urethane sheet is flammable and, when burned, produces a toxic gas such as a cyan gas or a hydrogen monoxide gas, so that it is necessary to make it flame-retardant. However, if a flame retardant is mixed to such an extent that the flame retardancy standard is satisfied, the cost becomes high, the density becomes high and the weight becomes heavy, and the urethane sheet becomes hard and inevitably the flexibility decreases. In addition, the use of urethane cannot be regenerated by melting because of urethane cross-linking when it is discarded, and it also deteriorates and deteriorates the physical properties, and because it is sublime, it is difficult to reclaim it. There is. On the other hand, even if an attempt is made to incinerate, the toxic gas that is generated causes a troublesome problem that it cannot be incinerated easily.

As described above, the interior material in which the urethane foam sheet is attached to the side surface is complicated in the manufacturing process, high in cost, comfortable in use and texture, inferior in conformability to the shape of the sheet, incombustible and in use. It has many problems such as difficulty in later disposal. In particular, from the viewpoint of recent importance of environmental protection, there has been a demand for the development of products that can be recycled, but urethane products are not suitable for this demand.

[0007]

SUMMARY OF THE INVENTION Therefore, a first object of the present invention is to provide a lateral composite material which does not cause the above-mentioned various adverse effects and problems when a foamed urethane sheet is used. A second object of the present invention is to provide a side-face composite having good breathability, excellent comfort and texture, and good conformability to a sheet shape. The third object of the present invention is to
An object of the present invention is to provide a lateral composite material that can be recycled after use and that does not cause a troublesome disposal process. It is another object of the present invention to provide a lateral composite that meets the criteria for flame retardancy without the use of flame retardants in the amounts that would be included in a urethane foam sheet. Still another object of the present invention is to provide a method capable of industrially producing a lateral composite material that achieves the above object. Yet another object of the present invention is to provide a cushion structure and a vehicle cushion structure using the lateral composite according to the present invention.

[0008]

According to the study by the present inventors, the object of the present invention is to use (A) a polyester-based short fiber aggregate having a denier of 2 to 100 as a matrix. Is mixed with short fibers having at least a thermoplastic polymer having a melting point of 40 ° C. or more lower than the melting point of the polyester constituting the short fibers on the fiber surface, and the short fiber aggregate is formed by fusion bonding of the thermoplastic polymer. An integrated lateral material comprising a sheet-like material having a density of 0.01 to 0.1 g / cm ³ and a thickness of 2 to 20 mm and a (B) lateral material, which are integrated, In the composite, the sheet-like material and the side material are substantially composed of an adhesive polymer in which the fibers of each of the surface layers at their laminating interfaces have melting points of 20 ° C. or more lower than the melting point of the thermoplastic polymer. It is achieved by a side-by-side composite body, which is characterized in that it is adhered and laminated in a dot-like manner. According to the study of the present inventors, another object of the present invention is a method for producing the lateral material composite, in which the thermoplastic resin is added to the sheet-shaped material or the interface to be laminated of the lateral material. Adhesive polymer particles having a melting point lower than the polymer melting point by 20 ° C. or more and having an average particle diameter of 50 to 200 μm are dispersed, the sheet material and the side material are superposed, and then the adhesive polymer particles are heated to a melting temperature. There is provided a method for producing a lateral material complex, which comprises heating.

The lateral composite body, the method for producing the same and the cushion structure of the present invention will be described in more detail below. The side material (B) constituting the side material composite of the present invention may be a material commonly used as a material for vehicle seats, beds, furniture, futons, etc., and may be woven or knitted fabric. It doesn't matter. Examples thereof include pile fabrics represented by moquette, fabrics such as jaguat and dobby; and knitted fabrics such as double russell, tricot and circular knit. In the case of a fluffed cloth such as a moquette, the side grounds are usually subjected to a back coat treatment in order to prevent the yarn from coming off.

The side material used in the present invention may be back-coated, but it is not always required to be back-coated. That is, the reason is that the side-by-side composite of the present invention is laminated and integrated as a composite with a sheet-like material described later, and even if the back-coat-treated side-by-side is not used by the integration, the side-by-side yarn loss prevention This is because the effect has been achieved. Therefore, the side material composite of the present invention does not require the use of a back coating-treated side material, so that not only the cost can be reduced, but also excellent effects such as breathability and softness can be exhibited.

The sheet-like material (A) which constitutes the side material composite of the present invention together with the side material has a polyester short fiber aggregate having a denier of 2 to 100 as a matrix. Short fibers having at least a thermoplastic polymer having a melting point of 40 ° C. or more lower than the melting point of polyester constituting the short fibers (hereinafter, this may be simply referred to as “low melting short fibers”) are dispersed and mixed. It has a structure in which the short fiber aggregates are integrated by the melting point of the thermoplastic polymer.

The sheet (A) has a density of 0.01.
~ 0.1 g / cm ³ , preferably 0.02 to 0.08 g / c
m ³ has a flexible compression properties, has excellent cushioning property and breathability. This (A) sheet material is 2 to 2
A thickness of 0 mm, preferably 3 to 15 mm is suitable.
If the thickness is less than 2 mm, the cushioning property is deteriorated. On the other hand, if the thickness is more than 20 mm, the lateral composite material is insufficient in flexibility and sheet shape conforming property and is unsuitable.

The sheet-like material (A) will be described in more detail below. (A) Polyester short fibers that form the matrix of the sheet-like material are ordinary polyethylene terephthalate,
Short fibers made of polybutylene terephthalate, polyhexamethylene terephthalate, polytetramethylene terephthalate, poly-1,4-dimethylcyclohexane terephthalate, polypivalolactone or copolymer esters thereof, or a cotton blend of these fibers, or the above polymers Among them, a composite fiber composed of two or more kinds. The cross-sectional shape of the short fibers may be circular, flat, irregular or hollow. In particular, short fibers made of polyethylene terephthalate or its copolymer are preferable.

Since the polyester short fibers are fused by the low melting point fibers to form a matrix that forms the framework of the cushioning material, the polyester short fibers alone are required to be bulky and to exhibit repulsion. It Alone bulkiness (JIS L-1097) is, 50 cm ³ / g or more under a load of 0.5 g / cm ^2, under a load of 10 g / cm ² 2
It is preferably 0 cm ³ / g or more, and more preferably 60 cm ³ or more and 25 cm ³ / g or more, respectively. If the bulkiness is low, the problems such as low elasticity and compression repulsion of the obtained lateral composite material become significant.

The short fibers may have an average fineness of 2 denier or more, preferably 2 to 100 denier, more preferably 4 to 80 denier. When the fineness is less than 2 denier, the bulkiness is not exhibited, and the cushioning property and the repulsion force become poor. On the other hand, when it is more than 100 denier, it is difficult to make the fibers into a web, and the number of constituents of the obtained sheet-like product becomes too small, resulting in poor cushioning property.

On the other hand, the number of crimps of the polyester short fibers is preferably 4 to 25 / inch, and the crimp degree is preferably 20 to 40%. If the number of crimps or the degree of crimping is too small, it is not preferable because the web becomes difficult to be bulky or difficult to be webbed. In addition, it has poor cushioning and repulsion properties and low durability. On the other hand, if the number of crimps or the degree of crimping is too large, the bulkiness of the web does not increase and only a high-density sheet-like product can be obtained, or when the web is formed, the entanglement of fibers is strong and streaky unevenness, etc. Is not preferable.

The polyester staple fiber has a fiber length of 5 m.
m or more, preferably 10 to 100 mm, particularly preferably 15 mm to 90 mm is advantageous. The content ratio of the polyester type short fibers in the sheet material is 90 to 50% by weight, preferably 85 to 55% by weight.

On the other hand, in the sheet (A), the low-melting point fiber for fusing the short fiber aggregate as the matrix is a low-melting point heat having a melting point of 40 ° C. or more lower than the melting point of the polyester short fiber as the matrix. This is a short fiber in which the plastic polymer has at least a part particularly on the fiber surface, and at least a part of the surface thereof is melted by heating and can be fused with the polyester type short fibers or the low melting point fibers. When this melting point difference is 40 ° C. or less,
The processing temperature becomes close to the melting point of the polyester short fibers, the physical properties and crimping properties of the polyester short fibers deteriorate, and the cushioning performance decreases, and the shrinkage during molding increases. Examples of such heat-fusible fibers include copolymerized polyester fibers, fibers containing thermoplastic elastomer, polyolefin fibers, polyvinyl alcohol fibers, and the like. In particular, the conjugate fiber having the above-mentioned low melting point polymer component in at least one side is preferable because it has excellent shape retention stability and moldability. The composite form is preferably a side-by-side type, a core-sheath type, an eccentric core-sheath type or the like.
Of course, it is preferable that the short fiber has a cross-sectional shape in which the low melting point component is exposed on the surface.

However, after heat fusion, it is repeatedly compressed and deformed,
Moreover, in a cushioning application in which the amount of compression, that is, the amount of deformation is large (for example, 50% of the thickness), the heat fixing point is easily deformed when a deformation stress is applied, and when the deformation stress disappears, no distortion is left and the original It is necessary to easily return to the position. The fact that a large amount of deformation is added to the sheet-like material
The entanglement point composed of the low melting point polymer of the fibers forming the fiber is further greatly deformed such as an angle change, stretching, and twisting. Therefore, this heat-fixing polymer is required to have a property of being largely deformed and recovered, and therefore it is preferable to be composed of a thermoplastic elastomer having a large fracture elongation and a good elongation recovery property. A polyester elastomer is particularly preferable because the matrix fiber to be heat-fixed is a polyester fiber.

As the polyester elastomer, a polyether ester block copolymer obtained by copolymerizing thermoplastic polyester as a hard segment and poly (alkylene oxide) glycol as a soft segment, more specifically, terephthalic acid, isophthalic acid, Aromatic dicarboxylic acids such as phthalic acid, naphthalene-2,6-dicarboxylic acid, naphthalene-2,7-dicarboxylic acid, diphenyl-4,4-dicarboxylic acid, diphenoxyethanedicarboxylic acid, and sodium 3-sulfoisophthalate, 1,
Alicyclic dicarboxylic acids such as 4-cyclohexanedicarboxylic acid, succinic acid, oxalic acid, adipic acid, sebacic acid, dodecanedioic acid, dicarboxylic acids and other aliphatic dicarboxylic acids, or dicarboxylic acids selected from ester-forming derivatives thereof and the like. And an aliphatic diol such as 1,4-butanediol, ethylene glycol, trimethylene glycol, tetramethylene glycol, pentamethylene glycol, hexamethylene glycol, neopentylene glycol or decamethylene glycol, or
At least one diol component selected from alicyclic diols such as 1-cyclohexanedimethanol, 1,4-cyclohexanedimethanol, and tricyclodecanedimethanol, or ester-forming derivatives thereof, and an average molecular weight of about 400 to About 5000 polyethylene glycol, poly (1,2- and 1,3-propylene oxide) glycol, poly (tetramethylene oxide)
It is a terpolymer that is composed of at least one kind of poly (alkylene oxide) glycol such as glycol, a copolymer of ethylene oxide and propylene oxide, a copolymer of ethylene oxide and tetrahydrofuran, and the like.

However, a block copolymerized polyether polyester having polybutylene terephthalate as a hard segment and polyoxytetramethylene glycol as a soft segment from the viewpoints of adhesiveness with polyester short fibers, temperature characteristics, strength, physical properties, etc. preferable. In this case, the polyester portion constituting the hard segment is polybutylene terephthalate whose main acid component is terephthalic acid and whose main diol component is butylene glycol component. Of course, a part of this acid component (usually 3
0 mol% or less) may be substituted with another dicarboxylic acid component or an oxycarboxylic acid component, and similarly, a part of the glycol component may be substituted with a dioxy component other than the butylene glycol component. Further, the polyether component constituting the soft segment may be a polyether substituted with a dioxy component other than tetramethylene glycol. It should be noted that various stabilizers, ultraviolet absorbers, thickening and branching agents, matting agents, coloring agents, and various other improving agents may be added to the polymer, if necessary.

Since the short fibers containing the low melting point polymer are mixed with each other during the production of the sheet-like material and are an adhesive component for forming the sheet-like material, the denier is 2 to 100 denier. Is preferred, especially 2
~ 50 denier is preferred. If the denier is small, there will be too many binding points and it will be difficult to obtain cushioning properties. On the other hand, if it is too thick, the number of bonding points is too small and the repulsion property is too low, or it tends to come loose during use. The cut length is preferably 38 to 255 mm, and the crimp is preferably 4 to 50 pieces / inch. If it deviates from this range, it becomes difficult to mix and it becomes difficult to make a web. In addition, the cushioning performance and compression durability of the sheet-like material are also reduced.

It is suitable that the low-melting-point fiber has a blending ratio of 10 to 50% by weight, preferably 15 to 45% by weight. When the ratio of the low melting point fiber is less than 10% by weight, the number of adhesion points of the fiber structure becomes too small, resulting in too low compression resilience and too low compression durability. On the other hand, when the ratio is higher than 50% by weight, the number of bonding points of the sheet-like material is too large, so that only a hard cushioning property is obtained, or the low melting point fiber is compressed (generally, the low melting point fiber is However, due to the heat-melting property of the low-melting point polymer, it is difficult to heat-fix during production and the shrinkage is high), and it becomes difficult to obtain the shape of the sheet-shaped article designed in advance.

In particular, as the structure of the sheet-like product (A) of the present invention, the polyester crimped short fiber aggregate described in Japanese Patent Publication No. 3-819082 is used as a matrix, and the short fiber aggregate is A thermoplastic polyester elastomer having a melting point of 40 ° C. or more lower than that of the polyester constituting the short fibers, and polyester, the former of which at least elastic composite fibers exposed on the fiber surface are dispersed / mixed, and at that time, the structure thereof In the body, (a) amoebar-shaped omnidirectional flexible heat-fixing points formed by heat-sealing each other with the elastic composite fibers crossing each other, and (b) the elastic composite fibers and the non-elastic polyester. It is preferable that the cushion structure has the quasi-omnidirectional flexible heat-fixing points formed by heat fusion in a state where the system staple fibers are crossed with each other. The specific contents and manufacturing method are described in the above publication.

The sheet material of the present invention can be manufactured by various methods. Next, some of them will be described. That is, it can be obtained by mixing polyester short fibers and low melting point short fibers, opening them with a card or the like to form a web, laminating webs or webs, and compressing and heat-molding a predetermined amount of the webs. In addition, sandwiching laminated fluffs etc. in a conveyor consisting of flat plates composed of punching plates and caterpillar type upper and lower punching plates, pressurizing and heating at a temperature higher than the melting point of the low melting point fibers and lower than the melting point of the polyester short fibers. And then
There is a method of heat fusion. Further, the compression hardness of the sheet material is preferably 3 to 50 kgf. If the hardness is low and too soft, the compression rebound is lost, which is not preferable. On the other hand, if this value is too high, it is difficult to deform even if compressed and it is too hard and the cushioning property is lost, which is not preferable. The sheet-like material generally has a uniform density, but the density can be changed in the thickness direction. That is, 0.01 to 0.1 g / c
In the range of m ³ , the surface to be laminated with the side material has a high density, while the surface on the opposite side has a low density, and a density gradient is provided in the thickness direction to provide a softer texture. It is possible to obtain a lateral complex having

The side material composite of the present invention is a product in which the (A) sheet-like material and the (B) side material are laminated and integrated, and the sheet-like material and the side material are laminated and integrated. It is characterized in that both fibers in the surface layer portion are adhered to each other substantially in a dot shape by an adhesive polymer at the laminated interface. That is, in the side-by-side composite of the present invention, both fibers are bonded at the surface layer through the small particles of the melted adhesive polymer, and the sheet-like material and the side-by-side are integrated. Therefore, the adhesive polymer does not exist in the form of a layer or a wide range of films at the interface between the two layers, but exists in the form of a large number of molten small blocks.

The adhesive polymer has a melting point of 20 ° C. or more, preferably 30 ° C. or more lower than the melting point of the thermoplastic polymer in the low melting point fibers forming the sheet (A). Usually, the melting point of the adhesive polymer depends on the melting point of the thermoplastic polymer and cannot be unconditionally determined, but is generally 80 to 130 ° C, preferably 90 to 125 ° C.
The range is appropriate.

In the side-by-side composite of the present invention, the adhesive polymer has a function of adhering the fibers of the sheet-like material and the side-by-side fibers in a dot-like manner at the laminating interface. less than usual amount used for adhesion of the backcoat or fibers each other, 1 m ² per 5 to 50 g, preferably sufficient range of 1 m ² per 10 to 40 g. If the amount of the adhesive polymer used is less than 5 g per 1 m ² , the adhesive force between the sheet-like material and the side material will not be sufficiently achieved,
Easy to peel off. On the other hand, when the amount exceeds 50 g, the adhesive force does not increase even if the amount exceeds 50 g, but rather the side-by-side composite material tends to be hard and the air permeability tends to be greatly reduced. Since the adhesive polymer is used in the above range and is present in the form of dots at the laminating interface, the lateral composite according to the present invention has excellent breathability and retains a soft texture, and the lateral and sheet form. A fabric which is integrated with a product with sufficient strength and whose side surface has a yarn dropout has a sufficient yarn dropout prevention effect and can prevent misalignment of the woven fabric. Various adhesive polymers can be used as long as they have the above-mentioned melting points. Specific examples include copolymerized polyester-based, copolymerized nylon-based, ethylene vinyl acetate-based, vinyl acetate-based, SBR-based, olefin copolymer hot-melt type or copolymerized nylon-based elastomers, and polyester-based elastomers. To be Among these adhesive polymers, the copolyester adhesive is more effective. It is considered that the reason is that since the constituent fibers of the sheet-like material are formed of polyester, they have an affinity for adhesion. In particular, copolymerized polyester adhesives containing ethylene terephthalate units are excellent. Further, in order for the adhesive to adhere in a dot shape, a thin non-woven fabric made of these polymers or a granular form is preferable.

According to the research conducted by the present inventor, the side material composite has a melting point of 20 or more than the melting point of the thermoplastic polymer in the sheet material at the interface of the (A) sheet material or (B) side material to be laminated. Characterized in that adhesive polymer particles having a melting point lower than 0 ° C. or higher and an average particle diameter of 50 to 500 μm are dispersed, the sheet material and the side material are overlapped, and then heated to a temperature at which the adhesive polymer particles melt. It was found that it can be obtained by the method.

The lateral composite of the present invention comprises (A) a sheet material and (B) a lateral material at any of the interfaces to be laminated,
Particles, short fibers or thin non-woven fabric formed from an adhesive polymer (these are referred to as "adhesive polymer components") are dispersed or laminated, a sheet-like material and a side material are overlapped, and heat treatment is performed at a temperature at which the adhesive polymer melts. Can be obtained by doing. However, the method of using the above-mentioned adhesive polymer particles and dispersing them at the lamination interface and melting them is more excellent. The adhesive polymer particles have an average particle size of 50 to 50.
A particle size in the range of 0 μm, preferably 60 to 400 μm is suitable, but its particle size also depends on the roughness of the side material or sheet-like material to be dispersed. That is, when the adhesive polymer particles are dispersed on the surface of the side material or the sheet-like material, it is suitable that the size of the particles is too small and many particles do not penetrate deeply into the side material or the sheet-like material. The adhesive polymer component is homogeneously dispersed at a rate of 5 to 50 g per m ^{2 on the} surface of the sheet or the side material to be laminated, and then the side material or the sheet material is superposed thereon and heated to a predetermined temperature. do it. The heating is a temperature at which the adhesive polymer melts, and a temperature at which the thermoplastic polymer in the sheet does not melt. As the heating method, various methods can be adopted as long as the adhesive polymer interposed between the sheet-shaped material and the side material is heated under the condition that the adhesive polymer is melted, but preferably the laminated sheet-shaped material in an oven is used. It is a method in which the side material is put and heated in the oven at a predetermined temperature for a predetermined time. A heating time of 1 to 30 minutes is usually sufficient. Thus, the lateral composite of the present invention has excellent breathability, soft touch, and good texture. A fabric structure such as a sewing machine for thread pulling out as the upper side also has an effect that thread pulling out does not occur even if a laminated adhesion treatment such as a tricot half with a low weight or a spun bond like a urethane sheet is not performed. The air permeability is considerably affected by the air permeability of the lateral land itself used in the composite, but the air permeability of the lateral land itself is 0.
It is maintained at 8 to 0.4 times.

As described above, the lateral-site composite of the present invention is soft and does not bend at an angle even when bent,
Since it deforms with a gentle continuous curve, it can be used by covering the shape of various shaped materials. The side-by-side composite of the present invention is most suitable for seat seats of automobiles, trains, aircrafts, etc., but can also be preferably used for interior materials such as door trims, ceilings, dash silencers or floor bahts in automobiles. At that time, since the side ground composite itself has a weak cushioning property, it can be used by directly adhering it to the structure, or if another cushioning property is desired, another cushioning material may be used. It is also possible to stack them on top of each other or use them by sandwiching them. Further, when it is used not only for the above-mentioned vehicle but also for furniture, futon, bed, etc., it can exhibit an excellent comfortable texture and breathability. In particular, the lateral composite of the present invention is suitable for use as a vehicle seat. That is, the cushion structure formed by laminating or adhering the composite of the present invention on the surface of the cushion material formed in the shape of a seat is excellent in softness, texture and breathability. In that case, the cushioning material may be any of foamed polyutalene, natural or synthetic fiber wadding, fiber molding or natural bristle molding. In particular, a cushion structure in which a natural or synthetic fiber wadding or a fiber molded body is used as a cushioning material and the surface is coated with the side material composite of the present invention has excellent cushioning property, softness, texture, and breathability, and is comfortable. Has a feeling of use. Further, even if the flame-retardant treatment is not performed as an automobile interior material, the flame-retardant standard is satisfied. Furthermore, it can be recycled after use, and even if it is incinerated or discarded, it does not cause troublesome pollution problems.

The present invention will be described below with reference to examples.
The evaluation items in the examples were evaluated according to the following methods. (1) Crimping performance; number of crimps, degree of crimping; JIS L-101
The measurement was performed according to 5. (2) Density (g / cm ³ ) of the sheet-like material; cut out a part of the sheet-like material and measure the weight (g) and the thickness (mm) with a load plate having a load of 0.5 g / cm ² and then measure the volume. It was calculated from (cm ³ ). (3) Hardness (kgf); 2 according to JIS K-6401
It was measured according to the 5% compression hardness measurement method. (4) Melting point; heat suggestion analyzer 990 manufactured by Du Pont
Using a mold, measurement was performed at a temperature rise of 20 ° C./min to find the melting peak. If the melting temperature is not clearly observed, use a trace melting point measuring device (manufactured by Yanagimoto Seisakusho), sandwich about 3 g of polymer between two cover glasses, and gently press it with tweezers to raise the temperature at a rate of 20 ° C / min. Warm and observe the thermal change of the polymer. At this time, the temperature at which the polymer softens and begins to flow (softening point) is defined as the melting point.

(5) Bulkiness of web; JIS L-10
97. (6) Air permeability; measured according to JIS L-1079. (7) Flexibility: Five lateral side composites (n = 5) each having a width of 3 cm and a length of 10 cm were taken in the vertical and horizontal directions. Then both ends (10 cm length)
Was grasped and bent toward the center, and the linear distance between both ends of the bent part (the part where the curvature of the bend changes discontinuously) was measured and calculated by the following formula.

[0034]

[Equation 1]

Bending to the side ground side by this method and bending to the side opposite to the side ground side were measured for each sample (5 pieces), and were also measured in the vertical direction and the horizontal direction to calculate the average value. . (8) Thread loss; 5 cm × 15 on the side fabric of the side fabric complex
cm gummy tape and then 200g / cm
The load of ² was applied for 1 minute, the gum tape was peeled off, and the gum tape was peeled off for 3 seconds, which was judged by the number of threads attached to the surface of the gum tape. (9) Flameproof property: evaluated by the FMVSS 302 method.

[0036]

【Example】

[Example 1] 80/2 terephthalic acid and isophthalic acid
Polybutylene terephthalate 40 obtained by polymerizing an acid component mixed with 0 (mol%) and butylene glycol
% (Wt%) was further heated and reacted with 60% (wt%) of polytetramethylene glycol (molecular weight 2000) to obtain a block copolymerized polyether polyester elastomer. The melting point of this thermoplastic elastomer was 157 ° C. This thermoplastic elastomer was spun into a sheath, and polybutylene terephthalate (melting point 224 ° C.) was spun into a core by a conventional method so that the weight ratio of the sheath / core was 50/50. The conjugate fiber is an eccentric sheath-core type conjugate fiber. After drawing this fiber 2.0 times,
Then, the product was dried and the crimp was developed. The composite low melting point fiber obtained here had a denier of 9 denier, a crimp number of 13 / inch, and a crimp number of 30%.

30% (by weight) of this composite fiber and short fibers (14 denier, cut length 64 mm, number of crimps 9 / inch, crimping degree 30%, load of 0.5 g / cm ² obtained by an ordinary method) At 79 cm ³ / g, 10 cm ³ / g load, 34c
m ³ / g, hollow cross-sectional shape, melting point 256 ° C.) 70% (weight) were mixed and webbed with a card to obtain a laminated web. This web was sandwiched with a flat air-permeable mold so as to have a thickness of 1 cm and a density of 0.025 g / cm ^{3, and} was pressed and heated in a hot air oven at 195 ° C. for 2 minutes and then cooled to obtain a fiber molded sheet. It was The resilience at 25% compression was also relatively high at 20 to 30 kgf and was good. On the other hand, a moquette for an automobile seat cover obtained by a conventional method (Basis weight: 300 g / m ^2, thickness: 1.5 mm, air permeability: 8
0 cc / cm ² · sec (without back coating) on the back side of the nap side, a copolymerized polyester powder 992-5 manufactured by EMS Japan Co., Ltd., melting point 105-115 ° C.,
40g of powder diameter 300-500μm using a sieve
/ M ² and evenly spread, put the above-mentioned fiber molding sheet on top, and use a laminating machine of Mayer Co., with the lower side as the moquette, the upper 70 ° C, the lower 150 ° C, the clearance 13 mm, and the through press at 5 m / min. It stuck with the roller. Table 1 shows the physical properties of the lateral-site composite material obtained here.

The obtained side-by-side composite has almost no yarn loss, has very high flexibility, and has good conformability to various sheets. It was good without. Moreover, this side-by-side composite also maintained a high air permeability of 50 cc / cm ² / sec and had little stuffiness during wearing. Moreover, the touch was soft, soft, and good. Also, the flameproof property is FMV.
It was found to pass the SS 302 method. Moreover, since all the materials are composed of polyester materials, it is thought that they can be melted and remolded. Also, take a micrograph of the sheet-like material that was cut off the part where it was partially adhered (moquette), and observe the photo, and it was revealed that most of the powder was partially dotted and spread and adhered. did. The photograph is shown as FIG.

[Comparative Examples 1 to 7] As a comparative example, the denier of the matrix was changed and the lateral composite was denier of 1.5 denier in the same manner as in Example 1 (Comparative Example 1). It had no resilience and poor elasticity.
On the other hand, the one having a denier of 150 denier (Comparative Example 2) had a low repulsion property and was unfavorable as a side fabric composite having a rough texture, and the sewing quality was poor. on the other hand,
The lateral material composite obtained in the same manner as in Example 1 except that the density of the sheet-like material was 0.008 g / cm ³ (Comparative Example 3) and 0.12 g / cm ³ (Comparative Example 4) was 0.008 g. / Cm ³ has poor cushion resilience, 0.012 g / c
m ³ was too hard and did not have cushioning properties, and was not suitable as a lateral composite. On the other hand, the powder average particle size 650 in which the melting point of the polymer was changed to 140 ° C. by changing the composition of the powder of Example 1
The same processing as in Example 1 was performed using μm (Comparative Example 5), but there was a part where there was no adhesion. Further, the temperature of the roller (lower side) was raised to 190 ° C. It turned out to be unfavorable. Further processed by increasing the amount of powder sprayed (70 g / m ² ) (Comparative Example 6)
When the adhesive part was observed, the powders were stuck to each other to form a film as shown in FIG. The lateral composite material produced here is very unfavorable because it has a very low air permeability of 15 cc / cm ² and is greatly inferior in flexibility. On the other hand, the lateral composite material (Comparative Example 7) processed in the same manner as in Example 1 except that the cloth on which the opposite side of the naps of the moquette was back-coated with an acrylic ester was used, was the same as when the powder spraying amount was increased. Showed a tendency. Further, when the bonded portion was observed, it was found that the polymer film on the lateral side, the sheet-like fiber and the powder were fused.

[Comparative Example 8] Furthermore, in the moquette of Example 1, 8
A urethane layer having a thickness of 12 mm and a density of 0.020 g / cm ³ was melt-bonded at a high temperature due to a flame to a fabric coated with 0 g / m ^{2 of} an acrylic ester at a high temperature of 30 g / m ^{2 with a} 30 denier nylon tricot. Table 1 shows the physical properties of the lateral base composite in which the same was adhered by a flame. This lateral-site composite had a very weak flexibility, and was very likely to have a bent shape. In addition, the touch was unfavorable because it had a feeling of sudden denting if the hardness peculiar to urethane was held down.

[0041]

[Table 1]

[Comparative Example 9] A lateral composite was obtained in the same manner as in Example 1, except that the average particle size of the copolyester powder was 30 µm and 40 g of this powder was used. In the obtained side-by-side composite, the powder particles were too small, the yarn of the moquette was easily pulled out, and the adhesive effect was insufficient. FIG. 3 shows a micrograph of the adhesive surface on the sheet-like side of this side-by-side composite.

[Comparative Example 10] In Example 1, the average particle diameter of the copolyester-based powder is 100 to 200 μm.
m, and a lateral composite was obtained in the same manner except that the spray amount was 4 g / m ² . The obtained lateral base composite had a small amount of powder particles sprayed, a large amount of yarn missing from the moquette, and a low adhesiveness. A micrograph of the adhesive surface on the sheet side of the lateral base composite is shown in FIG.

[Brief description of drawings]

FIG. 1 is a micrograph showing a state of an adhesive surface on a sheet-like material side in a side-by-side composite body of Example 1 (A is 15 times magnification, B is 50 times magnification).

FIG. 2 is a micrograph showing a state of an adhesive surface on a sheet-like material side in a side-by-side composite body of Comparative Example 6 (B is a magnification of 50 times).

FIG. 3 is a photomicrograph showing the state of the adhesive surface on the sheet side in the side-by-side composite body of Comparative Example 9 (A is 15 times magnification, B is 50 times magnification).

FIG. 4 is a photomicrograph showing the state of the adhesive surface on the sheet side in the side-by-side composite body of Comparative Example 10 (A is 15 times magnification, B is 50 times magnification).

Claims (10)

[Claims] 1. A polyester-based short fiber aggregate having 2 to 100 denier (A) is used as a matrix, and the short fiber aggregate has a melting point of 4 or more than the melting point of the polyester constituting the short fiber.
Short fibers having at least a thermoplastic polymer having a low melting point of 0 ° C. or more on the fiber surface are dispersed and mixed, and the short polymer is integrated by fusion of the thermoplastic polymer.
Having a density of 0.01-0.1 g / cm ³ and 2-20 m
A sheet-like material having a thickness of m and a (B) side material, which are laminated, wherein the sheet-like material and the side material have respective surface layers at their laminated interfaces. A lateral-side composite body, in which fibers of both are substantially point-shaped adhered and laminated by an adhesive polymer having a melting point of 20 ° C. or more lower than the melting point of the thermoplastic polymer. 2. The lateral composite according to claim 1, wherein the adhesive polymer is a polyester adhesive. 3. The adhesive polymer is 5 to 50 per m ^2.
The lateral-site complex according to claim 1, wherein g is contained. 4. A lateral composite according to claim 1, wherein the thermoplastic polymer is a thermoplastic polyester elastomer. 5. The lateral composite according to claim 1, which has an air permeability of 15 to 100 cc / cm ² · sec. 6. (A) A polyester-based short fiber aggregate having a denier of 2 to 100 is used as a matrix, and the short fiber aggregate has a melting point of 4 or more than the melting point of the polyester constituting the short fiber.
Short fibers having at least a thermoplastic polymer having a low melting point of 0 ° C. or more on the fiber surface are dispersed and mixed, and the short fiber aggregates are integrated by fusion of the thermoplastic polymer.
Having a density of 0.01-0.1 g / cm ³ and 2-20 m
A method for producing a lateral material composite in which a sheet material having a thickness of m and (B) lateral material are laminated, wherein the thermoplastic polymer is present at the interface of the sheet material or the lateral material to be laminated. It has a melting point lower than the melting point by 20 ° C. or more and is 50 to 500 μ.
A method for producing a lateral material composite, which comprises dispersing adhesive polymer particles having an average particle diameter of m, stacking the sheet-like material and a lateral material, and then heating to a temperature at which the adhesive polymer particles melt. 7. The method according to claim 6, wherein the adhesive polymer particles are polyester particles. 8. The method according to claim 6, wherein the adhesive polymer particles are dispersed in an interface to be laminated in an amount of 5 to 50 g per 1 m ² . 9. A cushion structure in which the lateral composite body according to claim 1 and a cushion material are integrated. 10. A vehicle seat comprising the cushion structure according to claim 9.