JP3454374B2 - Laminated net, manufacturing method and product using the same - Google Patents

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a laminated reticulated body having excellent cushioning properties, heat resistance and vibration absorption and reinforced with a recyclable non-woven fabric, a manufacturing method and a futon using the laminated reticulated body. , Furniture, beds, cushioning materials for vehicles, etc. and manufacturing method.

[0002]

2. Description of the Related Art At present, as a cushion material for furniture, beds, trains, automobiles, etc., urethane foam, non-elastic crimped fiber wadding,
In addition, resin cotton or hard cotton to which non-elastic crimped fibers are adhered is used.

However, although the foamed-crosslinked urethane has very good durability as a wadding layer or a cushioning material, it has poor moisture permeability and heat storage property and is apt to be stuffy.
Moreover, since it is not thermoplastic, it becomes difficult to recycle, and when it is incinerated, the damage to the incinerator is large and the cost for removing the toxic gas is high. For this reason, landfilling has become more frequent, but it is difficult to stabilize the ground, and there is a problem that landfilling sites are limited and costs increase. Further, although it has excellent processability, it also has a problem of pollution of chemicals used during manufacturing. In addition, since the fibers are not fixed in the thermoplastic polyester fiber wadding, the form may collapse during use, the fibers may move, and the crimp may cause a decrease in bulkiness and elasticity. become.

As a resin cotton in which polyester fibers are adhered with an adhesive, for example, a rubber-based adhesive is used, Japanese Patent Application Laid-Open No.
0-11352, JP-A 61-141388, JP-A 61-141391 and the like. Further, as a method using a cross-linkable urethane, JP-A-61-1377
No. 32 publication and the like. These cushion materials have inferior durability, and also have problems such as not being recyclable because they are neither thermoplastic nor single composition, and there are problems such as complexity of processability and pollution of chemicals used during manufacturing. .

Polyester hard cotton, for example, JP-A-58-3
1150, JP-A-2-154050, JP-A-3-220354, etc., but since an amorphous polymer having a brittle adhesive component of the heat-bonding fiber used is used (for example, JP-A-58). -136828, Japanese Patent Application Laid-Open No. 3-
However, there is a problem in that durability is poor such that the bonded portion is brittle and the bonded portion is easily broken during use and the form and elasticity are reduced. As an improved method, a method of entanglement treatment has been proposed in Japanese Patent Laid-Open No. 4-245965, but there is a problem that the brittleness of the bonded portion is not solved and the elasticity is largely reduced. In addition, there is complexity during processing. Further, there is a problem that the bonded portion is hard to be deformed and soft cushioning is hard to be imparted. For this reason, the polyester elastomer that is soft even at the bonded portion and recovers even if it is deformed to some extent
A heat-bonding fiber using a non-elastic polyester as a core component is disclosed in JP-A-4-240219, and a cushion material using the fiber is disclosed in WO-91 / 19032, JP-A-5-155651. It is proposed in Japanese Patent Laid-Open No. 5-163654. The adhesive component used in this fiber structure has a polyalkylene glycol content of 30 to 50 as a soft segment of polyester elastomer.
Wt%, 5% terephthalic acid as the acid component of the hard segment
It contains 0 to 80 mol% and is used as another acid component composition
As in the fiber described in Japanese Patent Publication No. 0-1404, isophthalic acid is contained to increase the amorphous property, and the melting point is 180.
The temperature is below ℃, and the heat-bonded part is well formed with a low melt viscosity to form an ameber-shaped bonded part, but it is easy to plastically deform, and because the core component is an inelastic polyester, plastic deformation especially under heating Becomes remarkable, and there is a problem that the heat resistance and compression resistance are lowered. As an improved method for these, Japanese Patent Laid-Open No.
No. 163654 proposes a structure consisting only of a polyester elastomer containing isophthalic acid as a sheath component and a heat-bonding composite fiber using an inelastic polyester as a core component. Plastic deformation becomes significant, the heat resistance and compression resistance deteriorate, and there is a problem in using it for a wadding layer or a cushion material. On the other hand, there is a method in which a silicone oil is added to a base material of hard cotton to lower the friction coefficient of fibers to improve the durability and improve the texture.
It is proposed in Japanese Patent No. 158094. However, there is a problem with the adhesiveness of the heat-adhesive fiber and the durability is poor, so it is not preferable for use in a wadding layer or cushioning material.

A thermoplastic olefin network used for civil engineering work is disclosed in JP-A-47-44839. However, unlike a cushion made of fine fibers, the surface is uneven and the touch is poor, and since the material is olefin, the heat resistance durability is extremely poor and it cannot be used as a wadding layer or cushion material. In addition, Japanese Patent Publication No. 3-1766
No. 6 discloses a method in which ejection filaments having different fineness are fused to each other to form a mold, but the mesh structure is not suitable as a cushion material. Japanese Examined Patent Publication No. 3-55583 discloses that
A method of thinning only a very surface with a thinning device such as a rotating body before cooling is described. With this method, the surface cannot be flattened and a thick thin linear layer cannot be formed. Therefore, it does not provide a comfortable cushioning material. Japanese Patent Application Laid-Open No. 1-207462 discloses a vinyl chloride floor mat, but it is not preferable as a wadding material or a cushioning material because it has poor compression recovery at room temperature and remarkably poor heat resistance. is there. Note that no consideration is given to vibration damping in the above-mentioned structure.

[0007]

To solve the above problems,
Laminated netting suitable for cushion material reinforced with non-woven fabric, which is excellent in heat resistance and durability, shape retention, cushioning property, and vibration, and a futon using the laminated netting,
It aims to provide products and manufacturing methods such as furniture, beds, and cushions for vehicles.

[0008]

[Means for Solving the Problems] Means for solving the above-mentioned problems, that is, the present invention, the cross-sectional shape of the filament is a hollow cross-section or
Is a modified cross section with a fineness of 100 to 100,000 denier
3 continuous filaments made of thermoplastic elastic resin are bent and brought into contact with each other, and most of the contact portions are fused.
Forming a dimensional steric structure, surface substantially flattened reticulated laminated mesh body density nonwoven is bonded consisting continuous fibers on one side of 0.01 g / cm ³ of 0.2 g / cm ³ of , A thermoplastic elastic resin is discharged downward from the nozzle at a melting temperature 20 to 80 ° C. higher than its melting point than a multi-row nozzle having a plurality of orifices with a hollow cross section or atypical cross section forming , and they are in contact with each other in a molten state. While being fused to form a three-dimensional structure , a nonwoven fabric made of continuous fibers is bonded to one surface of the structure and sandwiched by a take-up device.
4 melted winding windings on both sides of the structure
If the surface is flattened by bending it 5 ° or more and deforming it
At the same time glue the contact points with the unbent discharge line
It is a method for producing a laminated net body in which a laminated structure of a three-dimensional structure and a nonwoven fabric is formed and then cooled in a cooling tank, and a product using the laminated net body.

[0009] The thermoplastic elastomeric resin in the present invention, rubber
It is a resin having elastic properties, and as the soft segment, polyether glycol, polyester glycol and polycarbonate glycol having a molecular weight of 300 to 5000.
Polyester elastomers obtained by block-copolymerizing olefinic compounds or the like having carboxylic acids or hydroxyl groups at the ends of hydrocarbon groups of long chains or long chain, polyamide elastomers,
Examples thereof include polyurethane elastomers and polyolefin elastomers. By using a thermoplastic elastic resin, it becomes possible to regenerate by remelting, and thus recycling becomes easy. For example, as a polyester elastomer, a thermoplastic polyester is used as a hard segment,
Examples thereof include a polyester ether block copolymer having polyalkylenediol as a soft segment or a polyester ester block copolymer having an aliphatic polyester as a soft segment. Polyester d
More specific examples of the terblock copolymer include terephthalic acid, isophthalic acid, naphthalene -2,6- dicarboxylic acid, naphthalene- 2,7- dicarboxylic acid and diphenyl.
-Aromatic dicarboxylic acids such as 4,4'- dicarboxylic acid, 1,
At least one of alicyclic dicarboxylic acids such as 4- cyclohexanedicarboxylic acid, aliphatic dicarboxylic acids such as succinic acid, adipic acid, sebacic acid dimer acid or dicarboxylic acids selected from ester-forming derivatives thereof ,
Aliphatic diols such as 1,4- butanediol, ethylene glycol, trimethylene glycol, tetremethylene glycol, pentamethylene glycol and hexamethylene glycol, 1,1- cyclohexanediene Methanol,
Alicyclic di-one such as 1,4- cyclohexane dimethanol
Or at least one diole component selected from these ester-forming derivatives, and polyethylene glycol, polypropylene glycol, polytetramethylene glycol having an average molecular weight of about 300 to 5,000.
It is a ternary block copolymer composed of at least one kind of polyalkylene diol such as ethylene glycol and ethylene oxide-propylene oxide copolymer. As the polyester ester block copolymer, at least one of each of the above dicarboxylic acids and diol and polyester diol such as polylactone having an average molecular weight of about 300 to 5,000 is used.
It is a ternary block copolymer composed of seeds. Considering heat adhesion, hydrolysis resistance, stretchability, heat resistance, etc., terephthalic acid as dicarboxylic acid, or naphthalene -2,6- dicarboxylic acid, and diole component as 1, 1
4- butanediol, polyalkylenemole as the polyalkylenemole terpolymer block copolymer, or polyesterdiol as the polylactone 3
Original block copolymers are particularly preferred. In the special case, it is and this also use those obtained by introducing a soft segment of polysiloxane-based. Also, the thermoplastic elastomer resin of the present invention includes those obtained by blending the above elastomer with a non-elastomer component, those obtained by copolymerization, those obtained by softening the polyolefin component, and the like. As a polyamide elastomer, nylon 6 is used for the hard segment.
Nylon 66, Nylon 610, Nylon 612, Nylon 11, Nylon 12, etc. and their copolymerized nylon are used as the skeletons, and the soft segment has an average molecular weight of about 3
A block copolymer composed of at least one of polyalkylenediols such as polyethylene glycol, polypropylene glycol, polytetramethylene glycol, ethylene oxide-propylene oxide copolymer, etc. Alternatively, two or more kinds may be mixed and used. Furthermore, blends of non-elastomer components and copolymers thereof can be used in the present invention. The polyurethane elastomer is (A) number average molecular weight of 1000 to 6000 in the presence or absence of a usual solvent (dimethylformamide, dimethylacetamide, etc.).
(C) Diamine is added to the prepolymer having both ends of which are isocyanate groups by reacting the polyester and / or polyester having a hydroxyl group at the terminal of (B) with the polyisocyanate containing (B) an organic diisocyanate as a main component. Polyurethane elastomer chain-extended with polyamine as main component
Can be illustrated as a representative example. The polyester or polyether of (A) has an average molecular weight of about 1000 to 60.
00, preferably 1300 to 5000 polybutylene adipate copolyester or polyethylene glycol
Polyalkylenediols such as propylene, polypropylene glycol, polytetramethylene glycol and ethylene oxide-propylene oxide copolymers are preferred, and as the polyisocyanate of (B), conventionally known polyisocyanate is used. but it is, diphenylmethane -
An isocyanate mainly composed of 4,4'- diisocyanate may be used, and if necessary, a trace amount of conventionally known triisocyanate may be added and used. As the polyamine (C), known diamines such as ethylenediamine and 1,2- propylenediamine are mainly used, and if necessary, trace amounts of triamine and tetraamine may be used in combination. These polyurethane elastomers may be used alone or in combination of two or more. The melting point of the thermoplastic elastic resin of the present invention is preferably 140 ° C. or higher at which heat resistance and durability can be maintained.
It is more preferable to use one having a temperature of 0 ° C. or higher because the heat resistance and durability are improved. If necessary, an antioxidant, a light-proofing agent or the like may be added to improve durability. The soft segment content of the thermoplastic elastic resin constituting the component having the function of absorbing vibration and stress, which is the object of the present invention, is preferably 20% by weight or more, more preferably 40% by weight or more, and the heat and sag resistance Therefore, it is preferably 80% by weight or less, and more preferably 70% by weight or less. That is, the soft segment content of the component having the function of absorbing vibrations and stress of the elastic network of the present invention is preferably 20% by weight or more and 80% by weight or less, more preferably 40% by weight or more and 70% by weight or less. .

It is preferable that the filament made of the thermoplastic elastic resin constituting the composite network of the present invention has an endothermic peak below the melting point in the melting curve measured by a differential scanning calorimeter. Those having an endothermic peak below the melting point have significantly improved heat resistance and sag resistance than those having no endothermic peak. For example, as a preferable polyester-based thermoplastic resin of the present invention, one containing 90 mol% or more of terephthalic acid or naphthalene -2,6- dicarboxylic acid having rigidity in the acid component of the hard segment, more preferably terephthalic acid The content of acid and naphthalene -2,6- dicarboxylic acid is 9
5 mol% or more, particularly preferably 100 mol% and glyco-
After transesterification of the monomer component, polymerization is performed to a required degree of polymerization, and then, as the polyalkylene diol, the average molecular weight is preferably 500 or more and 5000 or less, particularly preferably 10
00 to 3000 polytetramethylene glycol in an amount of 15% to 70% by weight, more preferably 30% by weight.
When copolymerized in an amount of not less than 60% by weight and not more than 60% by weight, if the content of terephthalic acid or naphthalene -2,6- dicarboxylic acid, which has rigidity in the acid component of the hard segment, is large, the crystallinity of the hard segment becomes large. The heat resistance and sag resistance are improved, but the heat resistance and sag resistance are improved. However, the heat resistance and sag resistance is further improved by annealing at a temperature lower than the melting point by at least 10 ° C. or more after melt heat bonding. If annealing is performed after applying compressive strain, heat resistance and sag resistance are further improved. The endothermic peak is more clearly expressed in the melting curve measured by a differential scanning calorimeter of the linear structure of the network structure treated as described above at a temperature of room temperature or higher and melting point or lower. If annealing is not performed, no endothermic peak appears in the melting curve above room temperature and below the melting point. By analogy with this, it is considered that the annealing causes rearrangement of the hard segments and formation of pseudo-crystallization-like cross-linking points to improve the heat resistance and sag resistance. (This treatment is defined as pseudo crystallization treatment.) This pseudo crystallization treatment effect is also effective for polyamide elastic resin and polyurethane elastic resin.

According to the present invention, the filament has a hollow cross-section or a hollow cross-section.
A continuous linear filament made of a thermoplastic elastic resin having a modified cross section and a fineness of 100 to 100,000 denier is bent and brought into contact with each other to form a three-dimensional solid structure in which most of the contact portions are fused. A nonwoven fabric made of continuous fibers is joined to the back surface of a mesh whose surface is substantially flattened to form a laminated mesh having a density of 0.01 g / cm ³ to 0.2 g / cm ³ . In the laminated reticulate body of the present invention, the cross-sectional shape of the filament is hollow.
Continuous filaments having a cross-section or a modified cross-section and made of a thermoplastic elastic resin form a three-dimensional three-dimensional structure in which most of the contact portions are fused and fused and integrated, and the surface is substantially flattened. In addition, since a nonwoven fabric made of continuous fibers is bonded to the back surface, most of the vibration applied from the outside is absorbed and attenuated by the vibration absorption function of the thermoplastic elastic resin, giving a large deformation stress locally. Even if the surface of the laminated reticulate body is substantially flattened and most of the contact portion is fused, the back surface is bonded to the back surface with a nonwoven fabric made of continuous fibers, It receives the deformation stress and disperses the deformation stress, and the filaments made of thermoplastic elastic resin form a three-dimensional solid structure and are fused and integrated.
The entire structure is easily deformed and the deformation stress is absorbed by energy conversion, and when the deformation stress is released, the rubber elasticity of the thermoplastic elastic resin easily restores the original shape, so there is no sag resistance. Is good. Since the known mesh-like body composed of filaments made only of non-elastic resin does not have rubber elasticity, it is plastically deformed by compressive deformation and does not recover, resulting in poor durability. When the surface of the laminated net is not substantially flattened, when a local external force is applied to the surface, stress concentration may be selectively generated up to the lines and bonding points of the surface. With respect to such external force, fatigue due to stress concentration may occur and sag resistance may decrease. In addition,
When the filaments are made of thermoplastic elastic resin, the entire structure is deformed in the three-dimensional structure, so that stress concentration is relieved.
In the case of non-elastic resin, stress concentrates on the bonding point as it is, causing structural destruction and cannot be recovered. Furthermore, if the surface is not substantially flattened and has irregularities, the buttocks feel a foreign substance when sitting, which is unfavorable for sitting. In addition,
When the linear shape is not continuous, the adhesion point serves as a stress transmission point, so that the stress is remarkably concentrated at the adhesion point and structural destruction occurs. JP 61-137732, WO 91-1
It is not preferable because the heat resistance and durability like the structure disclosed in Japanese Patent No. 9032 are poor. If they are not fused, the shape cannot be maintained and the structure does not deform integrally, resulting in a fatigue phenomenon due to stress concentration and poor durability, and at the same time deforming the shape and making it impossible to maintain the body shape, which is not preferable. . The more preferable degree of fusion in the present invention is that most of the portions where the filaments are in contact are fused, and most preferably all the contact portions are in fusion. The function of the cushion material is that the cushion layer is a layer that thickens the basic fineness and makes it a little harder and is responsible for body shape maintenance, and a layer with a slightly higher density with a component with good vibration damping properties that absorbs vibration and blocks vibration. The surface layer is made slightly finer and the number of filaments is increased as a slightly soft layer to give a comfortable buttocks touch by moderate subduction to evenly disperse the buttocks pressure distribution and absorb with the cushion layer. By integrating the layer that absorbs the vibration that could not be performed and blocks the vibration of the resonance part of the human body, stress and vibration can be integrally deformed and absorbed to improve the sitting comfort. Further, the surface in contact with the frame is reinforced with a reinforcing material to be integrated with the cushion layer to form a surface (reinforcing layer) for supporting the cushion material, and by maintaining the shape of the cushion, a comfortable and durable seat can be obtained. . Therefore, the laminated network of the present invention is also intended to provide a cushioning material having the functions of both the cushion layer and the reinforcing layer, and a nonwoven fabric made of continuous fibers which is thin but has a high reinforcing effect as a reinforcing material for the cushioning layer. Are joined and integrated. If it is not joined to the cushion layer, the reinforcing effect of the cushion layer will be lost, which is not preferable. If the reinforcing material is a monofilament non-woven fabric, the reinforcing effect per thickness of the non-woven fabric is poor and the weight becomes heavy, which is not preferable. The preferred nonwoven fabric of the present invention is a spunbonded nonwoven fabric having a basis weight of 20 g / m ^2.
~ 500 g / m ² . If the basis weight is less than 20 g / m ² , the reinforcing effect will be poor, and if it exceeds 500 g / m ² , the formability will be poor, such being undesirable. It is preferable that the cushion layer and the reinforcing layer are made of polyester, for example, because it is not necessary to separate them when the seat is recycled. Thus, continuous filaments made of a thermoplastic elastic resin having good vibration absorption and elastic recovery form a three-dimensional three-dimensional structure in which most of the contact portions are fused, and the fusion is integrated so that the surface is substantially flat. The laminated mesh body in which the cushion layer and the reinforcement layer are integrally bonded to the back surface of the cushion layer is received by the surface layer to improve the dispersion of stress by receiving deformation stress on the surface and reduce the stress applied to each linear The entire structure supported by the layers deforms to absorb the deformation stress, and also improves the cushioning property to support the buttocks, recovers when the stress is released, and the vibration transmitted from the frame is also vibration absorption and elastic recovery The cushioning layer made of a good thermoplastic elastic resin absorbs the vibrations at the resonance part of the human body and blocks the vibrations of the human body, so that sitting comfort and durability can be improved. For this purpose, the fineness of the filament made of thermoplastic elastic resin having good vibration absorption and elastic recovery forming the laminated network of the present invention is 100 to 100,000 denier.
If the apparent density is 0.2g / cm ³ or less, 1000
If it exceeds 00 denier, the number of constituents is reduced, density unevenness is generated, and a structure with poor durability is partially formed, and fatigue due to stress concentration increases and durability deteriorates, which is not preferable. The fineness of the filament made of the thermoplastic elastic resin of the present invention is
If the fineness is too fine, the compression resistance becomes too low and the stress absorbability due to deformation decreases, so it is 100 denier or more,
Does not impair the structure's compactness due to a decrease in the number of components 50
It is less than 000 denier. More preferably, it is at least 500 denier and at most 10,000 denier. When the average apparent density of the laminated reticulate body of the present invention is 0.005 g / cm ³ , the repulsive force is lost, and the vibration absorbing ability and the deformation stress absorbing ability become insufficient, so that the cushioning function may not be easily exhibited. If it is 0.25 g / cm ³ or more, the repulsive force may be too high and the sitting comfort may be poor, so 0.01 g / cm ³ or more that the function as a cushion body is easily expressed by utilizing the vibration absorbing ability and the deformation stress absorbing function. 0.20 g / cm ³ or less, preferably 0.03 g / cm ³ or more and 0.08 g
/ Cm ³ or less. In the present invention, a method of forming a different fineness laminated structure in which a linear shape having a different fineness is combined with an apparent density to have an optimum configuration can be selected as a preferred embodiment.
The thickness of the laminated reticulate body of the present invention is not particularly limited, but if the thickness is less than 5 mm, the stress absorbing function and the stress dispersing function are deteriorated, so a preferable thickness is a surface function for dispersing force and a vibration or deformation stress absorbing function. The thickness that can be achieved is 10 mm or more, and more preferably 20 mm or more.

The cross-sectional shape of the filaments of the laminated network of the present invention is
In which the hollow cross-section or an irregular cross-sectional Preferred anti compressibility can impart (repulsive force) and touch. The anti-compression property can be adjusted by the fineness and the modulus of the material used to make the fineness fine, or in the soft material the hollowness and the irregularity can be increased to adjust the gradient of the initial compression stress, and the fineness can be made slightly thicker or slightly. A material with a high modulus lowers the hollow ratio and the degree of irregularity to provide anti-compression property with a comfortable sitting feeling. As another effect of the hollow cross section and the irregular cross section, by increasing the hollow ratio and the degree of irregularity, if the same anti-compression property is given, the weight can be further reduced, and the energy saving can be achieved when it is used for the seat of an automobile or the like. If it is a futon or the like, it will be easier to handle when raising and lowering. As another preferable method capable of imparting preferable anti-compression property (repulsive force) and touch, there is a method of forming the filament of the laminated network of the present invention into a composite structure. Examples of the composite structure include a score core structure, a side-by-side structure, and a combination structure thereof. However, in particular, 50% or more of the linear surface is made of a soft thermoplastic elastic resin in order to obtain a three-dimensional structure in which vibration and deformation stress that cannot be energy-converted even if the cushion layer is largely deformed can be energy-converted and recovered. And a side-by-side structure and a combination thereof. That is, in the sheath core structure, the sheath component is a thermoplastic elastic resin having a large content of soft segments that can easily convert energy into vibration and deformation stress, and the core component is a thermoelastic resin having a small content of soft segments exhibiting anti-compression properties. Composed of a plastic elastic resin, it can give a comfortable touch to the buttocks due to an appropriate depression. With the side-by-side structure, the melt viscosity of a thermoplastic elastic resin with a high soft segment content that facilitates energy conversion of vibration and deformation stress is lower than the melt viscosity of a thermoplastic elastic resin with a low soft segment content that exhibits anti-compression properties. A structure in which the proportion of thermoplastic elastic resin occupying a linear surface and having a large amount of soft segment is increased (metaphorically, a structure in which a thermoplastic elastic resin is arranged in an eccentric sheath-core structure) It is particularly preferable that the ratio of the thermoplastic elastic resin having a large soft segment content occupying the linear surface is 80% or more, and most preferably the thermoplastic elastic resin having a large soft segment content occupying the linear surface. Is a score with the ratio of 100% as 100%. When the proportion of the thermoplastic elastic resin with a large soft segment content that occupies the linear surface is large, the flowability when melting and fusing is high, so there is the effect of strengthening the adhesion, and the structure deforms as a unit. In this case, the fatigue resistance against stress concentration at the bonding points is improved, and the heat resistance and durability are further improved.

The surface of the laminated reticulate body composed of filaments made of thermoplastic elastic resin is substantially flattened, most of the contact portions are fused, and the back surface is continuous with a high reinforcing effect. Nonwoven fabric made of fibers is joined and integrated, and both sides are substantially flattened, so laminated nets and other nets, non-woven fabrics, knitted fabrics, hard cotton, films, foams, metals, etc. can be heated. In order to bond with the adhesive body, another thermal adhesive component (thermal adhesive nonwoven fabric, thermal adhesive fiber, thermal adhesive film, thermal adhesive resin, etc.) or an adhesive agent is used to form an integrated laminated structure, for vehicle seats, ships. Seats, vehicles, boats, hospitals, and other commercial and household beds, furniture chairs, office chairs, duvets, etc. Made of wide area and strong adhesion with good adhesion durability It is possible to obtain. In addition,
By performing the above-mentioned pseudo-crystallization treatment at any stage from the step of forming the laminated network to the product, the filaments made of the thermoplastic elastic resin in the structure are subjected to the melting curve measured by the differential scanning calorimeter at room temperature. It is more preferable to have an endothermic peak at a temperature equal to or higher than the melting point, because the heat resistance and durability of the product is remarkably improved. When the filaments of the laminated network of the present invention have a composite structure, the laminated network can also be provided with a thermal adhesion function. For example, in the sheath core structure, a thermoplastic elastic resin containing a large amount of soft segment that facilitates energy conversion of vibration and deformation stress of the sheath component is used as a heat-adhesive component, and a soft segment containing the compressive property of the core component is contained. A thermoplastic adhesive resin having a small amount is used as a high melting point component to have a function of holding a net-like shape, and the melting point of the thermal bonding component is lower than the melting point of the high melting point resin by 10 ° C. or more. The function of can be added. Further, the surface layer of the laminated reticulate body of the present invention is also imparted with a heat-adhesive function by laminating a low-melting point thermoplastic elastic resin containing a large amount of soft segments which can easily convert energy of vibration and deformation stress into a heat-adhesive component. it can.
The melting point of the heat-adhesive component forming the filaments in the laminated reticulate body, which is preferable for exhibiting the heat-adhesive function, is 1 than the melting point of the high-melting component.
5 to 50 ° C lower melting point, more preferably 20 ° C
To 40 ° C lower melting point. The laminated reticulated body of the present invention having a heat-bonding function has a substantially flat surface, and most of the contact portions are fused, so that the reticulated body, non-woven fabric, knitted fabric, hard cotton, film, foam Since the contact area with the body to be heat-bonded such as metal can be widened, the heat-bonded area becomes wider,
Strongly heat-bonded new molded products and commercial seats such as vehicle seats, ship seats, vehicle seats, ship seats, hospital beds etc., home chairs, furniture chairs, office chairs, futons, etc. Obtainable. In addition, by performing pseudo crystallization at any stage until new molded products and products are commercialized, the filaments made of the thermoplastic elastic resin in the structure are melted by a differential scanning calorimeter. It is more preferable to make the curve have an endothermic peak at a temperature of room temperature or higher and melting point or lower because a product with significantly improved heat resistance and durability can be provided. When the adherend is adhered in a stretched state during thermal adhesion,
Since the adhered body does not relax the stretched state due to the rubber elasticity of the adhesive layer, it can be made into a molded body with tension and less likely to wrinkle.

Next, the manufacturing method of the present invention will be described. The manufacturing method of the present invention uses a multi-row nozzle having a plurality of orifices capable of forming a hollow cross section or atypical cross section and a thermoplastic elastic resin at a melting point of 2 or more.
A non-woven fabric made of continuous fibers is bonded on one side while discharging downward from the nozzle at a melting temperature higher than 0 ° C. and higher than 80 ° C., contacting each other in a molten state and fusing to form a three-dimensional structure. This is a method for producing a laminated mesh body which is sandwiched by a take-up device and cooled in a cooling tank. The thermoplastic elastic resin is melted using a general melt extruder, supplied to a multi-row nozzle having a plurality of orifices, and discharged below the orifices. The melting temperature at this time is 20 to 80 ° C. higher than the melting point of the thermoplastic elastic resin. If the melting temperature is higher than 80 ° C. higher than the melting point of the thermoplastic elastic resin, thermal decomposition becomes remarkable and the rubber elastic properties of the thermoplastic elastic resin deteriorate, which is not preferable. On the other hand, unless the temperature is higher than the melting point of the thermoplastic elastic resin by 10 ° C. or more, melt fracture occurs and normal filament formation cannot be performed. Further, when the filament is formed by looping after discharge and is brought into contact and fused. The temperature may decrease and the filaments may not fuse together, resulting in a laminated composite network with insufficient adhesion, which is not preferable. According to the present invention, however, since the melted linear shapes are brought into contact with each other and fused to form a three-dimensional structure, the nonwoven fabric made of continuous fibers is bonded to one surface of the melted linear shapes. If the temperature is not higher than the temperature that can be applied by 5 ° C. or more, the linear fusion bonding with the nonwoven fabric becomes insufficient. The preferred melting temperature is 20 ° C to 6 ° C above the melting point.
0 ° C higher temperature, more preferably 25 ° C to 40 ° C above melting point
℃ is a high temperature. The shape of the orifice is hollow (for example, triangular hollow, round hollow, or hollow with protrusions) and / or irregular cross-section (for example, triangular, Y-shaped, star-shaped, etc.) In addition to the above effect, the three-dimensional structure formed by the discharge filaments in the molten state is less likely to flow-relaxation by adopting the shape, and conversely, the flow time at the contact point can be maintained for a long time to strengthen the adhesion point. When heating for adhesion as described in Japanese Patent Application Laid-Open No. 1-2075, the three-dimensional structure is easily relaxed, a planar structure is formed, and a three-dimensional three-dimensional structure becomes difficult, which is not preferable. As an effect of improving the properties of the laminated reticulate body, the apparent bulk can be increased, the weight can be reduced, the anti-compression property can be improved, and the elasticity can be improved, which is difficult to achieve.
In the case of a hollow cross section, if the hollow ratio exceeds 80%, the cross section tends to be crushed, so that it is preferable that the weight reduction effect is 10%.
Or more and 70% or less, more preferably 20% or more and 60% or less. The pitch between the holes of the orifice is the rule formed by the linear shape.
It is necessary to make the pitch so that the bumps can make sufficient contact. The pitch between holes is shortened for a dense structure, and the pitch between holes is lengthened for a coarse structure. The pitch between the holes of the present invention is preferably 3 mm to 20 mm, more preferably 5 mm to 10 mm. In the present invention, different densities and different fineness can be obtained as desired. The different density layer can be formed by a configuration in which the pitch between rows or the pitch between holes is also changed, or a method in which the pitch between both rows and holes is also changed. Also, if the pressure loss difference at the time of discharge is given by changing the cross-sectional area of the orifice, the principle that the discharged amount of molten thermoplastic elastic resin extruded from the same nozzle at a constant pressure becomes smaller for the orifice with larger pressure loss, is used. It is possible to manufacture a reticulated structure composed of filaments of different fineness by using a nozzle having at least a plurality of rows having different cross-sectional areas of orifices in a section in the longitudinal direction. Then, it is discharged downward from the nozzle, and while forming a loop, they are brought into contact with each other in a molten state and fused to form a three-dimensional structure, and a nonwoven fabric made of continuous fibers is continuously supplied to one surface. ,
Both sides of the laminated net-like structure, which is in the molten state and is bonded to the three-dimensional structure in the molten state, are sandwiched by a take-up net,
The number of twisted discharge lines on the surface of the mesh is 4
Bend over 5 ° to deform and flatten the surface, and at the same time form a structure by adhering the contact points with the unbent discharge line, and then continuously form a cooling medium (usually water at room temperature is used for cooling). It is preferable because the speed can be increased and the cost can be reduced). Thus, the three-dimensional three-dimensional network structure of the present invention is rapidly cooled to obtain the laminated network. The distance between the nozzle surface and the take-off point is preferably at least 40 cm or less to prevent the discharge filament from being cooled and the contact portion not being fused. If the discharge amount of the discharge line is 5g / hole or more, 10cm-40
cm is preferable, and 5 cm to 20 cm is preferable when the discharge amount of the discharge filament is less than 5 g / hole. The thickness of the laminated network is determined by the opening width of the take-up net (interval between the take-up nets) that sandwiches both surfaces of the three-dimensional structure in the molten state. In the present invention, the opening width of the take-up net is set to 5 mm or more for the above reason. Next, it is drained and dried, but if a surfactant or the like is added to the cooling medium, draining and drying may be difficult, or the thermoplastic elastic resin may swell, which is not preferable. A preferred method of the present invention is to perform a pseudo crystallization treatment by annealing at a temperature of at least 10 ° C. or lower than the melting point of the thermoplastic elastic resin in any step from once cooling to integral molding to commercialization and forming a laminated network. Obtaining a body or product is a more preferred method of preparation. The pseudo-crystallization treatment temperature is at least 10 ° C. lower than the melting point (Tm), and is higher than the α dispersion rising temperature (Tαcr) of Tan δ. By this treatment, the heat-resistant sag resistance is remarkably improved as compared with the one having no endothermic peak (having no endothermic peak) having an endothermic peak below the melting point. The preferred pseudo-crystallization treatment temperature of the present invention is (Tαcr + 10 ° C) to (Tm-20 ° C). If it is pseudo-crystallized by simple heat treatment, heat resistance and sag resistance are improved. However, it is more preferable to impart compressive deformation of 10% or more and anneal to significantly improve the heat resistance and sag resistance. When the drying step is performed after cooling once, the pseudo crystallization treatment can be performed at the same time by setting the drying temperature to the annealing temperature. Further, it is possible to perform a separate pseudo-crystallization treatment in the process of commercialization. Then, it is cut into a desired length or shape and used as a cushion material. The desired loop diameter and wire diameter can be determined by the distance between the nozzle surface and the take-up conveyor installed on the cooling medium for solidifying the resin, the melt viscosity of the resin, the orifice hole diameter and the discharge amount, and the like. A non-woven fabric composed of continuous fibers that are continuously supplied while fusing the portions in contact with each other by sandwiching and holding the discharge filaments in a molten state with a pair of take-up conveyors with adjustable spacing installed on the cooling medium. When forming a net-like structure by fusion-bonding and continuously drawing into a cooling medium to solidify, by adjusting the interval of the conveyor, it becomes possible to adjust the thickness while the fused net-like body is in a molten state. A desired thickness can be obtained. If the conveyor speed is too high, the formation of contact points may be insufficient, or the contact point may be cooled until the fusion point is sufficiently formed, resulting in insufficient fusion of the contact portion. Further, if the speed is too slow, the melt will stay too much and the density will increase, so it is necessary to set the conveyor speed suitable for the desired apparent density. It should be noted that if the supply speed of the nonwoven fabric made of continuous fibers is not the same as the surface speed of the take-up conveyor, pulling or loosening will occur and the reinforcing function of the cushion will deteriorate, which is not preferable.

When the laminated reticulate body of the present invention is used as a cushion, it is necessary to select a resin to be used, a fineness, a loop diameter and a bulk density depending on the purpose of use and the site of use. For example,
In order to give a soft touch, moderate depression and bulging with tension, it is preferable to have a low density, fine fineness, and a fine loop diameter, and in order to develop the cushion function of the middle layer, the resonance frequency Is lowered, and moderate hardness and hysteresis at the time of compression are changed linearly to improve body retention.
In order to maintain durability, it is preferable to have a structure in which a layer having a medium density and a large fineness, a layer having a relatively large loop diameter and a layer having a low density and a fineness and a fine loop diameter are laminated and integrated. Also,
It can be used for vehicle seats, boat seats, beds, chairs, furniture, etc. by molding it into a shape suitable for the purpose of use by using a molding die or the like to the extent that the three-dimensional structure is not impaired.
Of course, it is also possible to use it in combination with other materials such as a different mesh body, a hard cotton cushion material composed of a short fiber aggregate, a non-woven fabric or the like so as to meet the required performance in relation to the application.
In addition, other than the resin manufacturing process, the molded product is processed from the manufacturing process to the extent that performance is not deteriorated, and at any stage of commercialization, it becomes flame retardant, insecticidal, antibacterial, heat resistant, water / oil repellent, colored, aroma, etc. It is possible to perform the processing such as the addition of chemicals to add the function.

[0016]

EXAMPLES The present invention will be described in detail below with reference to examples.

The evaluations in the examples were carried out by the following methods. Melting point (Tm) and endothermic peak below melting point TA50, DSC50 type differential thermal analyzer manufactured by Shimadzu Corporation was used, and the endothermic peak (melting peak) was measured from the endothermic curve measured at a temperature rising rate of 20 ° C./min. ) The temperature was determined. Tαcr polymer is heated to a melting point of + 10 ° C. to have a thickness of about 300 μm.
Film was prepared and measured using a Vibron DDVII type manufactured by Orientec Co., Ltd. at a rate of 110 Hz and a heating rate of 1 ° C./min. Tan δ (the ratio of the imaginary elastic modulus M ″ to the real part M ′ of the elastic modulus M ″ / The rising temperature of α dispersion corresponding to the transition temperature from the rubber elastic region to the melting region of M ′). The apparent density sample is cut into a size of 15 cm × 15 cm, the heights at four locations are measured, the volume is determined, and the weight of the sample is divided by the volume. (Average value of n = 4) Each fine line sample is cut out from 10 places of fine line fineness, embedded with an acrylic resin, a cross section is cut out, and a section is prepared to obtain a cross section photograph. The cross-sectional area (Si) of each part is obtained from the cross-sectional photograph of each part. In addition, a piece obtained in the same manner was dissolved in acrylic resin with acetone, degassed in vacuum, and a density gradient tube was used to 40 ° C.
Determine the specific gravity (SGi) measured in. Then, a linear weight of 9000 m is obtained from the following equation. (Unit: cgs) Fineness = [(1 / n) ΣSi × SGi] × 900000 Whether or not the fusion-bonded sample is fused by visual judgment is determined by whether or not the fibers adhering to each other can be pulled out by hand and removed. It is determined that something that does not come off is fused. Reinforcing effect Sample is cut into a size of 30 cm x 30 cm, and the diameter is 24 cm.
The degree of damage of the sample by dropping the iron ball 100 times with 0.5Hz cycle on the center of the sample with the device that the iron ball with the chain connected to the Was judged according to the following criteria. ⊚: No damage. ○: Slight damage.
Δ: The structure was partially destroyed. X: The structure is almost destroyed. (Average value of n = 3) Heat resistance durability (70 ° C residual strain) A sample was cut into a size of 15 cm x 15 cm, compressed by 50%, left at 70 ° C in dry heat for 22 hours, and then cooled to remove compression strain. The thickness (b) after standing for a day is calculated, and calculated from the thickness (a) before treatment by the following formula, that is, (ab) / a × 100: Unit% (average value of n = 3) Repeated compressive strain sample Is cut into a size of 15 cm x 15 cm, and it is 50% in a RH room at 25 ° C and 65% in a Shimadzu Servo Pulser.
The thickness (b) after leaving the sample for 20,000 times after repeating compression recovery at a cycle of 1 Hz up to the thickness of 1 is calculated from the thickness (a) before the treatment, that is, (ab) / ax Calculated from 100: Unit% (average value of n = 3) Sit comfort Toyobo's thermal bonding fiber 4-64-TE5 and Toyobo's three-dimensional crimp staple 10-64-745 are mixed and opened at a weight ratio of 30/70. The card web obtained by fiberizing
On the surface side of the laminated net body cut in the shape of a gauze, it is laminated so that the apparent bulk density of the molded cushion is 0.05 g / cm ³ , put in a female mold for thermoforming, and compressed with an oyster mold. Then, the cushion is molded with a hot air of 170 ° C for 10 minutes to form a bucket sheet, and the cushion is molded into a cushion sheet, covered with a polyester moquette made of Toyobo Co., Ltd., and set on the seat frame. Seats with side stoppers were made at four places and six places at the back, and a paneler was placed on the seats made at 30 ° C RH75% room for the following evaluation. (N = 5) (1) Feeling on the floor: The degree of "dosun" when sitting and the feeling of hitting the floor were qualitatively and qualitatively evaluated. Not felt; ◎, hardly felt; ○, slightly felt; △, felt; × (2) Feeling of stuffiness: Feeling stuffy when sitting for 2 hours and the buttocks and the part of the crotch that contacts the seat inside the crotch Qualitatively evaluated. Almost no feeling: ◎, slightly stuffy; ○, slightly stuffy; △, significantly stuffy; × (3) How long you can sit in the seat within 8 hours: within 1 hour; × within 2 hours; △ within 4 hours;
○ 4 hours or more; ◎ (4) A qualitative qualitative evaluation was performed on the degree of waist fatigue when the user sat in the seat for 4 hours. None; ◎, hardly tired; ○, slightly tired; △, very tired; × (5) Overall evaluation: 4 points from ◎ of the evaluations from (1) to (4), ○
3 points, △ is 2 points, × is 1 point and does not include Δ with 12 points or more; very good (⊚), that with 12 points or more; Good (○), 10 points or more is x It was evaluated as those which did not contain; those which were somewhat bad (Δ) and those which contained x; bad (x).

Examples 1 and 2 Dimethyl terephthalate (DMT) or dimethyl naphthalate (DM) was used as the polyester elastomer.
N) and 1.4 butanediol (1.4 BD) were charged with a small amount of a catalyst, and after transesterification by a conventional method, polytetramethylene glycol (PTMG) was added and polycondensation was performed while heating and depressurizing. -Formation of terester block copolymer elastomer, then addition and mixing of 2% of antioxidant, kneading, pelletizing, and vacuum drying at 50 ° C for 48 hours are shown in Table 1. .

[0019]

[Table 1]

Orifice shapes having a staggered arrangement with a hole pitch of 5 mm in the width direction and a hole pitch of 10 mm in the length direction on an effective surface of a nozzle of 50 cm in width and 5 cm in length are 2 mm in outer diameter and 1.6 mm in inner diameter.
With a nozzle with a triple bridge hollow forming cross section,
1. Discharge amount of the obtained thermoplastic elastic resin raw materials A-1 and A-2 per single hole at a melting temperature of 210 ° C and 245 ° C.
Discharge at the bottom of the nozzle at 0 g / min, arrange cooling water 12 cm below the nozzle surface, and arrange stainless steel endless nets with a width of 60 cm in parallel at intervals of 5 cm so that a part of the pair of take-up conveyors appears above the water surface. Then, while nipping it on one of the conveyors, a spunbonded non-woven fabric having a basis weight of 100 g / m ² made of PET fiber slit to a width of 50 cm was continuously supplied from one side, and the discharge line in the molten state was taken out. While fusing the contact part, it is also fused with the spunbonded non-woven fabric, sandwiching both sides of the laminate having a net-like structure composed of the spun-bonded non-woven fabric on one side at a speed of 1 m / min.
Table 2 shows the properties of the laminated reticulate body obtained by pulling into cooling water at 0 ° C to solidify, then performing pseudo-crystallization treatment for 20 minutes in a hot air dryer at 100 ° C, and cutting into a predetermined size. The laminated reticulate body of Example 1 was formed in a linear cross section having a triangular rice ball type hollow cross section with a hollow ratio of 40% and a fineness of 9000 denier, and an average apparent density of 0.047 g / cm.
^{Was 3} . In Example 2 as well, the cross-sectional shape is a triangular rice ball type hollow cross-section, and the hollow ratio is 38%, the fineness is formed from filaments having a denier of 8900, and the average apparent density of the reticulate body is 0.047 g / cm ³ . there were. As is clear from Table 2,
Example 1 was a cushioning material having excellent heat resistance, durability at room temperature, and sitting comfort due to the laminated network structure making the best use of the characteristics of the soft elastic resin, and the reinforcing effect was also practically usable. Example 2 was a cushioning material excellent in heat resistance, durability at room temperature, and sitting comfort due to the laminated network structure making the best use of the characteristics of a slightly hard elastic resin, and had a reinforcing effect that could be used practically. It can be seen that the seat created for evaluation also has excellent performance.

[0021]

[Table 2]

Reference Example 20 mol% of dimethyl isophthalate (DMI) and DMT
Table 1 shows the formulation of the polyester-based thermoplastic elastic resin (A-3) obtained in the same manner as in Example 1 by charging 80 mol% and 1.4-butanediol (1.4-BD) with a small amount of a catalyst. Show. An elastic composite reticulate body was obtained in the same manner as in Example 1 except that a nozzle having a circular cross section with a hole diameter of 1 mm was used for the orifice. The fineness of the solid round section is 9000 deniers.
The average apparent density of the reticulate body was 0.046 g / cm ³ .

Example 4 As a polyurethane elastomer, 4,4'-diphenylmethane diisocyanate (MDI), PTMG and 1.4BD as a chain extender were added and polymerized, and then 2% of an antioxidant was added and mixed. Table 3 shows the formulation of the polyether urethane polymer after kneading, pelletizing and vacuum drying.

[0024]

[Table 3]

The thermoplastic elastic resin thus obtained is melted at a melting temperature of 22.
Table 2 shows the properties of the elastic composite network obtained in the same manner as in Example 1 except that the temperature was 0 ° C. In Example 4, the filament has a triangular cross-sectional shape of a hollow rice ball and has a hollow ratio of 41% and a fineness of 98.
It was formed from filaments of 00 denier, and the average apparent density of the reticulate body was 0.047 g / cm ³ . Example 4
Is a cushioning material that has excellent heat resistance, durability at room temperature, and sitting comfort, making use of the characteristics of soft urethane, and has a reinforcing effect that can be used practically. It can be seen that the seat created for evaluation is also excellent.

Comparative Examples 1-2 Polyethylene terephthalate (PE with an intrinsic viscosity of 0.63)
T) and polypropylene with a melt index of 12 (P
P) had a melting temperature of 280 ° C. and 250 ° C., and the fineness of the filaments obtained in the same manner as in Example 3 was 8800 denier and 23 in Comparative Example 2 except that the crystallization treatment was not performed.
000 denier, the average apparent density is 0.047.
The properties of the grit / cm ³ mesh are shown in Table 2. Comparative Example 1 is a cushion material that is poor in heat resistance and durability because it is a net-like body made of non-elastic polyester and is hard and uncomfortable to sit on. Comparative Example 2 is a hard cushion material having poor heat resistance and durability because it is a reticulate body having a slightly large fineness and made of an inelastic olefin, and is an example in which the structure is completely destroyed in the reinforcing effect test.

Comparative Example 3 A part of the characteristics of the reticulate body obtained by the same method as the reference example is shown except that a take-up conveyor net is placed 60 cm below the nozzle surface and the pseudo-crystallization treatment is not performed. 2 shows. In addition, since the adhesive state is poor and it does not adhere to the nonwoven fabric and the shape retention is poor, the repulsive force at 50% compression, the apparent density, the reinforcing effect,
Residual strain at 70 ° C, repeated compressive strain, and sitting comfort were not evaluated. Comparative Example 3 is an example which is not suitable for the cushioning wadding layer because the form is not fixed.

Comparative Example 4 A filament obtained in the same manner as in Reference Example except that a take-up conveyor net was placed 25 cm below the nozzle surface to form a mesh without supplying spunbonded nonwoven fabric and no pseudo-crystallization treatment was performed. Has a fineness of 9100 denier and an average apparent density of 0.04
The properties of the 5 g / cm ³ mesh are shown in Table 2. Since Comparative Example 4 is made of a thermoplastic elastic resin, it is comfortable to sit on, but it is an unfavorable example as a cushioning material having poor heat retention, durability, and a reinforcing material, and thus retaining the shape of the network structure.

COMPARATIVE EXAMPLE 5 A nozzle having a width of 50 cm and a length of 5 cm and having a staggered arrangement of holes with a pitch of 10 mm in the width direction and a pitch of 20 mm between the holes in the length direction was used as a nozzle having a diameter of 2 mm. The fineness of the filaments obtained in the same manner as in Comparative Example 3 was 113 except that the discharge amount was 25 g / min, the take-up conveyor net was placed 30 cm below the nozzle surface, and the take-up was 1 m / min.
000 denier, the average apparent density is 0.154 g /
The properties of the laminated network of cm ³ are shown in Table 2. Comparative Example 5 is a cushioning material having a remarkably fineness and a density unevenness, which results in poor heat resistance and durability, and a slightly poorer sitting comfort, and inferior shape retention of the reinforcing material.

Comparative Example 6 The spacing (opening width) of the take-up conveyor net was set to 5 cm, and the side of the take-up conveyor net on which the spunbonded nonwoven fabric was supplied was arranged so that the melted discharge line was in contact with the side. Was obtained at the rate of 1 m / min, and the characteristics of the laminated reticulate body obtained in the same manner as in Comparative Example 3 with a linear fineness of 9000 denier and an average apparent density of the elastic reticulate body of 0.043 g / cm ³ were measured. It shows in Table 2. Comparative Example 6 is a cushioning material having a poor flatness of the surface of the laminated reticulate body, which has a low apparent density but is inferior in durability, is insufficient in thermal adhesion, and is a little inferior in sitting comfort, causing a feeling of foreign matter. This is also an example in which the shape retention of the reinforcing material is inferior.

Comparative Example 7 A sample was obtained in the same manner as the reference example except that the discharge amount per single hole was 3 g / min, the take-up conveyor net speed was 0.3 m / min, and the pseudo crystallization treatment was not performed. Streak fineness is 130
The average apparent density of the elastic mesh body is 0.2 at 00 denier.
The properties of the elastic network of 1 g / cm ³ are shown in Table 2. Comparative Example 7
Has a high apparent density, which makes it slightly uncomfortable to sit in, heat resistance,
This is an example of a cushioning material having insufficient durability and inferior shape retention of the reinforcing material.

Example 5 The composite reticulate body obtained in Example 1 was cut into a length of 120 cm,
On both sides, 30 pieces of Toyobo's thermal bonding fiber 4-64-TE5 and Toyobo's three-dimensional crimp staple 10-64-745 are used.
A card web obtained by mixing and opening at a weight ratio of / 70 is laminated and compressed on the surface side so that the total weight is 0.05 g / cm ^3, and thermoformed integrally with hot air at 200 ° C. for 10 minutes to obtain a thickness of 7 cm. I made 4 cushions. The obtained cushion was quilted at a thickness of 7 cm, a width of 120 cm, and a length of 50 cm, and the mattress was put in a side cloth having a width of 120 cm and a length of 200 cm. This mattress is placed on the bed and at 25 ℃ RH6
The panel comfort was sensory-evaluated by allowing the paneller to be used by 4 people for 7 hours in a 5% room. The bed was covered with sheets, the comforter was 1.8 kg of down / feather: 90/10, and the pillow was the one used by the paneler every day. As a result of the evaluation, the bed was a bed which had no feeling of flooring, had a moderate depression, and did not feel stuffy and had a comfortable sleeping comfort. For comparison, a similar mattress was prepared from a urethane foam plate with a density of 0.04 g / cm ³ and a thickness of 10 cm, and the mattress was placed on a bed and the sleeping comfort was evaluated. It was a bed that made me feel stuffy and didn't feel comfortable to sleep.

[0033]

EFFECTS OF THE INVENTION A surface made of a thermoplastic elastic resin having a good vibration and stress absorbing property forms a three-dimensional network structure and is fused and integrated so that the surface is substantially flattened and a continuous fiber non-woven fabric is reinforced on the back surface. The laminated reticulate body of the present invention is a cushioning material with improved vibration isolation, heat resistance and durability, bulkiness, and sitting comfort, and is resistant to stuffiness, and is used in combination with other materials to impart the above-mentioned preferred characteristics to vehicles. It is possible to provide products such as seats for cars, seats for ships, vehicles, ships, beds for business use in hospitals and hotels, cushions for furniture, bedding and the like. Furthermore,
It is also useful as an interior material and a heat insulating material for vehicles and building materials.

─────────────────────────────────────────────────── ─── Continued Front Page (51) Int.Cl. ⁷ Identification FI D04H 3/00 D04H 3/00 K // D01F 6/00 D01F 6/00 A 6/62 303 6/62 303D 6/86 301 6/86 301B (56) Reference JP 55-17527 (JP, A) JP 58-149362 (JP, A) JP 5-329281 (JP, A) JP 5-261184 (JP , A) JP-A-1-213454 (JP, A) JP-A-58-109670 (JP, A) Actual Kaihei 1-16326 (JP, U) (58) Fields investigated (Int.Cl. ⁷ , DB) Name) D04H 1/00-18/00 B68G 1/00-15/00 B32B 1/00-35/00 D01D 1/00-13/02 D01D 1/00-13/04

Claims (5)

(57) [Claims] [Claim 1] The cross-sectional shape of the filament is hollow or irregular
A continuous line made of a thermoplastic elastic resin having a fineness of 100 to 100,000 denier , which is a surface and is made to come into contact with each other to form a three-dimensional three-dimensional structure in which most of the contact portions are fused, surface substantially flattened layered mesh of 0.2 g / cm ³ density nonwoven is bonded consisting continuous fibers on one side of 0.01 g / cm ³ of the mesh body. 2. The laminated reticulated body according to claim 1, wherein the thermoplastic elastic resin which forms continuous filaments has an endothermic peak at a temperature of room temperature or higher and melting point or lower in a melting curve measured by a differential scanning calorimeter. 3. A thermoplastic elastic resin is melted by being discharged downward from the nozzle at a melting temperature 20 to 80 ° C. higher than its melting point than in a multi-row nozzle having a plurality of orifices having a hollow cross section or atypical cross section. one side of contacting with each other in a state while forming a three-dimensional structure are fused, and the structure
A non-woven fabric made of continuous fibers is bonded to the surface of the structure and sandwiched by a take-up device.
Bend the outgoing line 45 ° or more to deform it and to flatten the surface.
Contact point with discharge line that is not bent at the same time
Adheres to form a laminated structure of three-dimensional structure and non-woven fabric
After that, a method for producing a laminated mesh body that can be cooled in a cooling tank. 4. The method for producing a laminated reticulated body according to claim 3 , wherein after cooling once, annealing is performed at a temperature of at least 10 ° C. or lower than the melting point of the thermoplastic elastic resin. 5. A method according to claim 1 for a vehicle seat using a laminated net body according to, marine seats, vehicle, marine, industrial and household beds de such hospital furniture chairs, office chairs And the product described in any of the futons.