JP3454373B2 - Elastic network, manufacturing method and products 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 recyclable elastic mesh having excellent cushioning properties, heat resistance durability and vibration absorption, and a method for manufacturing the same, and a futon and furniture using the elastic mesh as a wadding layer. , Beds, cushioning materials for vehicles, etc.

[0002]

2. Description of the Related Art At present, urethane foam, non-elastic crimped fiber wadding, and resin cotton or hard cotton with non-elastic crimped fiber adhered to wadding layers and cushioning materials of furniture, beds, trains, automobiles, etc. It 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,
An elastic mesh body that is suitable for a cushioning wadding material and a manufacturing method and a futon that uses the elastic mesh body as a wading material, which is vibration resistant, has excellent heat resistance and durability, shape retention, and cushioning properties The purpose is to provide products such as cushions and manufacturing methods.

[0008]

[Means for Solving the Problems] Means for solving the above problems, that is, the present invention, has a fineness of 50 denier to 100.
00 denier - a three-dimensional structure that the majority of in contact with each other so Magarikunera a continuous filament of a thermoplastic elastic resin the contact portion is fused having rubber elasticity Le, the
Both surfaces of the structure are substantially flattened, the thickness is 2 to 50 mm, and the repulsive force at 50% compression is 40 kgf /
Elastic mesh of φ150 mm or less, thermoplastic elastic resin having rubber elasticity from a multi-row nozzle having a plurality of orifices is melted at a melting temperature which is 10 to 60 ° C. higher than its melting point, and is discharged downward from the nozzle. in while forming a three-dimensional structure by fusing in contact with each other, sandwiching the structure both sides with <br/> taking device, song molten state both sides of the structure
Bend the twisted discharge line by 45 ° or more to deform it.
Discharge that is not bent at the same time as the surface is flattened
After the structure is formed by adhering the contact points with the filaments and then cooling it in a cooling tank, the repulsive force at 50% compression is 40 kgf /
A method for producing an elastic net having a diameter of 150 mm or less and a product using the elastic net.

[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.

The present invention has a fineness of 50 denier to 100.
A continuous linear filament made of a thermoplastic elastic resin having a rubber elasticity of 00 denier is bent and brought into contact with each other to form a three-dimensional three-dimensional structure in which most of the contact portions are fused.
Both surfaces are substantially flat with a thickness of 2 mm or more 50
Repulsive force of 50% compression of reticulate body of mm or less is 40 kgf /
An elastic mesh body having a diameter of 150 mm or less. The elastic network of the present invention forms a three-dimensional three-dimensional structure in which continuous filaments made of a thermoplastic elastic resin are fused at most of the contact portions, and they are fused and integrated, and both surfaces are substantially flattened. When used as a wadding layer, the external vibration is absorbed by the vibration absorption function of the thermoplastic elastic resin, and most of the vibration is absorbed and attenuated. Since the surface of the body is substantially flattened and most of the contact part is fused, the elastic mesh surface receives the deformation stress and disperses the deformation stress, and the filament made of thermoplastic elastic resin is three-dimensional. Since the three-dimensional structure is formed and 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 makes it easy. The ability to recover to its original form A. For this reason, if the elastic mesh body of the present invention is laminated or laminated and adhered to the surface of the cushion layer having a body shape holding function as a wadding layer to form a seat, the depression when sitting is moderate and when the seat is subjected to vibration. It is possible to impart preferable characteristics as a cushioning material capable of exhibiting a preferable shock absorber function of supporting the buttocks with a low repulsive force by appropriately sinking the stress change due to the vertical movement of the body without feeling a floor. Further, since the elastic mesh body of the present invention can greatly reduce the mechanical load on the cushion layer, it is possible to provide the seat with good sag resistance. In the case of a net-like body composed of known filaments made of only non-elastic resin, if the filaments have a fineness in order to improve the touch, plastic deformation due to compressive deformation will occur and recovery will be poor, resulting in poor durability. When the surface of the elastic mesh is not substantially flattened, when a local external force is applied to the surface, stress concentration may occur selectively 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. When the filaments are made of thermoplastic elastic resin, the entire structure is deformed in the three-dimensional structure portion, so stress concentration is relieved. However, in the non-elastic resin, stress is concentrated at the bonding point and structural damage is caused. It will not occur and will not recover. When the linear shape is not continuous, the adhesion point serves as a stress transmission point, so that significant stress concentration occurs at the adhesion point and structural destruction occurs.
JP-A-61-137732, WO91-1903
It is not preferable because it has poor heat resistance and durability like the structure disclosed in Japanese Patent Publication No. 2 or the like. If they are not fused, the structure cannot be retained and the structure does not deform integrally, resulting in a fatigue phenomenon due to stress concentration and poor durability, and at the same time, the morphology deforms and a large damage occurs on the cushion layer. It is not preferable because it reduces the durability of the seat. 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.
Thus, the elastic mesh body of the present invention is intended to impart the function of the surface layer, and the fineness of the filaments is reduced, the touch is softened, the density is slightly increased, and the number of constituents is increased to increase the number of lines. To reduce the stress received by one of the strips to improve the dispersion of the stress, improve the cushioning property to support the buttocks, and absorb the vibration that could not be absorbed by the cushion layer to block the vibration of the resonance part of the human body. By using a thermoplastic elastic resin having good vibration absorption and elastic recovery, it is possible to improve the sitting comfort and durability. For this purpose, if the fineness of the filaments forming the elastic network of the present invention is less than 50 denier, the anti-compression property becomes too low and the stress absorbability due to deformation deteriorates, which is not preferable and exceeds 10,000 denier. It is not preferable because it becomes difficult to deform and the surface density is impaired due to the decrease in the number of constituents and the stress absorption function and the stress dispersion function are deteriorated. The preferred linear fineness of the elastic mesh is 50.
Denier or more and 8000 denier or less, more preferably 100 denier or more and 6000 denier or less. The elastic mesh body of the present invention has a thickness of 2 mm or more and 50 mm or less.
When the thickness is less than 2 mm, the stress absorbing function and the stress dispersing function are deteriorated, which is not preferable. In the case of an elastic mesh body having the same linear fineness, if it exceeds 50 mm, the soft property for retaining the function of the surface layer will cause excessive depression and adversely affect comfortable sitting comfort. When the linear fineness is the same, the preferable thickness of the elastic mesh body of the present invention is 5 as a thickness capable of exhibiting a surface function for dispersing force and a vibration or deformation stress absorbing function.
It is preferably not less than mm and not more than 40 mm, more preferably not less than 10 mm and not more than 30 mm. When a thick surface layer is required, in the present invention, a method of forming a different-fineness laminated structure in which linear shapes having different finenesses are combined with an apparent density to provide an optimal configuration can be selected as a preferred embodiment. The elastic reticulate body of the present invention has a repulsive force of 40 kgf / 40% when compressed with a compression plate of φ150 mm at 50% of the thickness in order to give a comfortable touch to the buttocks due to an appropriate depression.
φ150mm or less is required. If the repulsive force at 50% compression of the thickness exceeds 40 kgf / φ150 mm, the repulsive force becomes large, and it is not preferable because a comfortable touch cannot be given to the buttocks due to an appropriate depression. Preferred 5 of the present invention
Repulsion force at 0% compression is 2kgf / φ150mm or more, 30kg
f / φ150 mm, more preferably 5 kgf / φ15
It is 0 mm or more and 20 kgf / φ150 mm. When the fineness is made small, the apparent density can be made slightly high to impart preferable anti-compression property. The average apparent density of the elastic reticulate body of the present invention is not particularly limited, but at 0.005 g / cm ³ , the repulsive force is lost, and the vibration absorbing ability and the deformation stress absorbing ability become insufficient and it becomes difficult to develop the cushion function. There is
If it is 0.20 g / cm ³ or more, the repulsive force is too high and the sitting comfort may be poor, so the preferable apparent density is that the function as a cushion body is easily expressed by utilizing the vibration absorbing ability and the deformation stress absorbing function. 01 g / cm ³ or more 0.1
It is 5 g / cm ³ or less, more preferably 0.03 g / cm ³ or more and 0.08 g / cm ³ or less.

The cross-sectional shape of the filaments of the elastic reticulate body of the present invention is not particularly limited, but a hollow section or a deformed section can provide a preferable anti-compression property (repulsive force) and a touch, which is particularly preferable. . 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 elastic mesh body 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.

[0013] Thermoplastic elastomeric made of resin filament in the configured elastic mesh body having rubber elasticity is substantially both sides are flattened, by the majority of the contact portion is fused, elastic composite Other heat-bonding components (heat-bonding nonwoven fabric, heat-bonding fiber, heat adhesive film integrally laminated structure conjugated with a heat adhesive resin, etc.) or an adhesive, a vehicle seat, marine seats, vehicle, marine, industrial and household beds de such hospital chair furniture When obtaining products such as office chairs and duvets, the contact area with the surface to be adhered can be widened, so that the adhesive area can be widened and a product with strong adhesion and good adhesion durability can be obtained. In addition, by performing the above-mentioned pseudo crystallization treatment at any stage after the step of forming the elastic network, the melting curve of the filament made of the thermoplastic elastic resin in the structure measured by the differential scanning calorimeter It is more preferable to have an endothermic peak at a temperature of room temperature or higher and melting point or lower, because the heat resistance and durability of the product is remarkably improved. When the filaments of the elastic network of the present invention have a composite structure, the elastic network can also be provided with the function of a thermal adhesive layer. 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. The melting point of the heat-bonding component forming the filaments in the elastic mesh body, which is preferable for expressing the function of the heat-bonding layer, is 15 ° C. to 50 ° C. higher than the melting point of the high-melting component.
The melting point is lower by 0 ° C., more preferably 20 ° C. to 40 ° C. lower. The elastic mesh 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 mesh body, the non-woven fabric, the knitted fabric, the hard cotton, the film, and the foam. Since the contact area with the body to be heat-bonded, such as metal, can be widened, the heat-bonded area is widened, and a new heat-bonded molded body and vehicle seat, ship seat, vehicle,
Marine, it is possible to obtain commercial and household beds de such as for hospitals, furniture chairs, office chairs, the product became futons. 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 at the time of heat-bonding, the adhered body does not relax the stretched state due to the rubber elasticity of the adhesive layer, so that the adherend can be a molded body having tension and less likely to wrinkle.

Next, the manufacturing method of the present invention will be described. According to the manufacturing method of the present invention, a thermoplastic elastic resin is discharged downward from the nozzle at a melting temperature higher than its melting point by 10 ° C. or more and less than 80 ° C. than a multi-row nozzle having a plurality of orifices, and they are in contact with each other in a molten state. It is a method of producing an elastic mesh body that is sandwiched by a take-up device and cooled in a cooling tank while being fused and fused to form a three-dimensional structure. 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. If the melting temperature at this time is higher than the melting point of the thermoplastic elastic resin by more than 80 ° C., the thermal decomposition is remarkable and the rubber elastic property of the thermoplastic elastic resin is deteriorated, 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 an elastic composite network with insufficient adhesion, which is not preferable. The preferred melting temperature is 20 ° C to 60 ° C above the melting point
℃ higher temperature, more preferably 15 ℃ to 40 ℃ above the melting point
It is a high temperature. The shape of the orifice is not particularly limited, but may be a hollow cross section (for example, a triangular hollow shape, a round hollow shape, a shape with a protrusion, etc.) and / or an irregular cross section (for example, a triangular, Y-shaped, star-shaped cross-section secondary mode). In addition to the above effects, it is difficult for the three-dimensional structure formed by the discharge filaments in the molten state to relax the flow, and on the contrary, the flow time at the contact point is maintained for a long time to strengthen the adhesion point. It is particularly preferable because it can be 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 elastic mesh, the apparent bulk can be increased and the weight can be reduced, and the anti-compression property can be improved.
The resilience can also be improved, making it difficult to lose weight. In the hollow cross section, if the hollow ratio exceeds 80%, the cross section tends to be crushed. Therefore, it is preferably 10% or more and 70% or less, more preferably 20% or more and 60% or less, which can exhibit the effect of weight reduction. The pitch between the holes of the orifice needs to be a pitch with which the loop formed by the line can sufficiently contact. The pitch between holes is shortened for a dense structure, and the pitch between holes is lengthened for a coarse structure. The hole pitch of the present invention is preferably 3 mm to 20 mm,
More preferably, it is 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. In the present invention, it is particularly preferable to use such a method or to reduce the single-hole discharge amount to form a fine net-like structure with fine filaments. Then, the liquid 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. After sandwiching and bending the melted and twisted discharge filaments on both sides of the mesh body by 45 ° or more to flatten the surface and at the same time bond the contact points with the unbent discharge filaments to form the structure,
Continuously quenching with a cooling medium (usually water at room temperature is preferable because the cooling rate can be increased and the cost is also reduced) to obtain the elastic composite network body of the present invention in the form of a three-dimensional three-dimensional network structure. . 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. 10 cm to 40 cm is preferable when the discharge amount of the discharge line is 5 g / min or more, and 5 when the discharge amount of the discharge line is less than 5 g / min.
cm to 20 cm is preferred. The thickness of the elastic netting is determined by the opening width (interval between the take-up nets) of the take-up net sandwiching 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 3 mm or more and 50 mm or less 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. As a preferred method of the present invention, after cooling once, pseudo-crystallization treatment by annealing is carried out at a temperature of at least 10 ° C. or lower than the melting point of the thermoplastic elastic resin in any step leading to product formation by integral molding and thermal bonding. A more preferred method is to obtain a composite network or product. The pseudo-crystallization treatment temperature is at least 10 ° C. lower than the melting point (Tm), and the tan α
The temperature is higher than the dispersion rising temperature (Tαcr). 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. Also, a pseudo crystallization treatment can be separately performed 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 pair of take-up conveyors with adjustable spacing installed on the cooling medium sandwiches and holds the melted discharge filaments to fuse the parts that are in contact with each other, and continuously draw in the cooling medium to solidify them. By adjusting the distance between the conveyors when forming the body, the thickness can be adjusted while the fused net-like body is in a molten state, and a desired thickness can be obtained. If the conveyor speed is too fast,
In some cases, the contact points may be insufficiently formed, or the contact points may be cooled by sufficient cooling until the fusion points are sufficiently formed. 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.

When the elastic network of the present invention is used for a wadding layer of 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 and moderate depression and tension bulge, low density and fine fineness,
It is preferable to make the loop diameter small, and in order to use the cushioning function of the middle layer together, lower the resonance frequency and linearly change the appropriate hardness and the hysteresis at the time of compression to improve the body shape 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 slightly large loop diameter and a layer having a low density and a fineness and a fine loop diameter are laminated and integrated. Further, 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 net-like body having a cushioning body function in the middle layer, a hard cotton cushioning material made of short fiber aggregate, and a non-woven fabric 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 the melting point + 10 ° C and the thickness is 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. A repulsive force sample at 50% compression was cut into a size of 30 cm × 30 cm, and a compression load cell was connected with a Tensilon manufactured by Orientec Co., Ltd. φ1
The center of the sample is 65% at a speed of 1 cm / min with a 50 mm disc.
The compression pressure when compressed up to 50% is continuously measured.
The compression pressure at the time of compression was determined and used as the repulsive force at the time of 50% compression. (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 carded web obtained by fiberizing was placed in a female mold for thermoforming so that the apparent density was 0.05 g / cm ³ ,
An elastic mesh formed by compressing with an oyster mold and filling with hot air at 200 ° C. for 10 minutes and heat-bonding and molding into a bucket sheet-like hard cotton as a cushioning material core and a wadding layer of the bucket sheet. Cut into a bucket sheet shape so as to wrap the core of hard cotton and stack them, and heat bond the core material and the wading layer with hot air at 130 ° C using a thermoadhesive polyester nonwoven fabric with a melting point of 120 ° C manufactured by Kurehatech Co., Ltd. The cushion was covered with polyester moquette made of Toyobo Co., Ltd., and set on the seat frame to create a seat with 4 side seats and 6 side back stops. A paneler was placed on a seat prepared in a room at 30 ° C and RH of 75%, and the following evaluation was performed. (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-to-hole pitch of 5 mm in the width direction and a hole-to-hole pitch of 4 mm on the effective surface of a nozzle having a width of 50 cm and a length of 3.2 cm have an outer diameter of 2 mm and an inner diameter of 1.6.
The resulting thermoplastic elastic resin raw materials A-1 and A-2 were melted at a melting temperature of 210 ° C. and 245 ° C. into a nozzle having a triple bridge hollow forming cross section of 0.8 mm / min. Is discharged below the nozzle at
Cooling water is placed under the cm, and stainless steel endless nets with a width of 60 cm are arranged in parallel at intervals of 3 cm so that a pair of take-up conveyors are partially exposed above the water surface, and are taken out while fusing the contact parts. , 25 at a speed of 1 m / min while sandwiching both sides
Table 2 shows the properties of the elastic composite reticulate body obtained by pulling it into cooling water at 0 ° C to solidify it, then performing pseudo-crystallization treatment for 20 minutes in a hot air dryer at 100 ° C, and then cutting it into a predetermined size. The elastic mesh body of Example 1 has a triangular cross-sectional shape of a hollow rice ball and has a hollow ratio of 40% and fineness of 3600 denier, and has an average apparent density of 0.045.
It was g / cm ³ . In Example 2 as well, the cross-sectional shape is a triangular rice ball type hollow cross section with a hollow ratio of 38% and a fineness of 3500 denier.
The average apparent density of the reticulate body was 0.045 g / cm ³ . As is clear from Table 2, Example 1 was a wadding layer for a cushioning material, which was excellent in heat resistance, durability at room temperature, and sitting comfort due to the dense mesh structure in which the characteristics of the soft elastic resin were utilized. Example 2 was a wadding layer for a cushioning material, which was excellent in heat resistance, durability at room temperature, and sitting comfort due to the dense mesh structure that took advantage of the characteristics of the slightly hard elastic resin. It can be seen that the seat created for evaluation also has excellent performance.

[0021]

[Table 2]

Example 3 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. Table 2 shows the characteristics of the elastic composite reticulate body 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. In addition, the fineness of the solid round cross section was formed from filaments having a denier of 3600, and the average apparent density of the reticulate body was 0.044 g / cm ³ . As is clear from Table 2, Example 2 was a cushioning wadding layer that was practically usable in terms of heat resistance and durability at room temperature, and was excellent in sitting comfort. It can be seen that the seat created for evaluation is also excellent.

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 39.
It was formed from filaments of 00 denier, and the average apparent density of the reticulate body was 0.045 g / cm ³ . Example 4
Was a wadding layer for a cushioning material that is a dense mesh body that takes advantage of the characteristics of soft urethane and has excellent heat resistance, durability at room temperature, and comfort to sit on. 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 3600 denier and 95 in Comparative Example 2 except that the pseudo-crystallization treatment was not performed.
00 denier with an average apparent density of 0.045g
Table 2 shows the properties of the reticulate body having a diameter of / cm ³ . Comparative Example 1 is an example which is not suitable for a wadding layer for a cushioning material which is poor in heat resistance and durability and is hard and uncomfortable to sit because it is a reticulate body made of non-elastic polyester having a slightly small fineness. Comparative Example 2 is a reticulate body having a slightly large fineness and made of an inelastic olefin, and therefore has poor heat resistance and durability, and is a little softer than Comparative Example 1, but is harder than the softness necessary for the wadding layer of the seat and is a cushioning wadding. This is an example not suitable for layers.

Comparative Example 3 Example 3 was repeated except that a take-up conveyor net was placed 60 cm below the nozzle surface and no pseudo-crystallization treatment was performed after the take-up conveyor net was taken.
Table 2 shows some of the properties of the elastic network obtained by the same method as described above. It should be noted that, since the adhesive state is poor and the shape retention is poor, 50
% Repulsive force at compression, apparent density, 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 nozzle having a width of 50 cm and a length of 3 cm, which has a staggered arrangement with a pitch between rows of 5 mm in the length direction and a pitch of holes of 10 mm in the width direction and has a circular cross section with a diameter of 1 mm. Discharge at a rate of 2.0 g / min per hole, and place a take-up conveyor net under the nozzle surface 25 cm to 0.4
The fineness of the filament obtained in the same manner as in Example 3 was 9100 deniers except that it was collected at 0 m / min and was not subjected to pseudo-crystallization treatment.
Table 2 shows the properties of the elastic reticulate body having an average apparent density of 0.11 g / cm ³ . Comparative Example 4 is an example which is not preferable as a wadding layer for a cushioning material because the repulsive force at 50% compression becomes 67 kgf, which is too hard and the sitting comfort is slightly poor.

Comparative Example 5 The same as Comparative Example 4 except that the discharge amount per single hole was 3 g / min, and a take-up conveyor net was placed below the nozzle surface 25 cm to take in at 1 m / min. The fineness of the obtained filaments was 134,000 denier, and the average apparent density was 0.0.
The properties of the elastic network of 44 g / cm ³ are shown in Table 2. Since Comparative Example 5 is an elastic mesh body having a remarkably fineness and uneven density,
This is an unfavorable example as a wadding layer for a cushioning material, which has poor heat resistance and a little poor seating comfort.

Comparative Example 6 The linear fineness obtained in the same manner as in Comparative Example 4 was 9,000 denier except that the spacing (opening width) of the take-up conveyor net was 5 cm and the speed of the take-up conveyor net was 1 m / min. With
Table 2 shows the properties of the elastic network having an average apparent density of 0.034 g / cm ³ . In Comparative Example 6, since the surface of the elastic mesh body was not flattened well, the apparent density was low, but the durability was poor, and the thermal adhesion was insufficient. This is an unfavorable example as a layer.

COMPARATIVE EXAMPLE 7 A nozzle having a width of 50 cm and a length of 6 cm was arranged in a staggered arrangement with a row-to-row pitch of 4 mm in the length direction and a hole-to-hole pitch of 4 mm in the width direction. Discharging was performed at 0.2 g / min, a take-up conveyor net was placed below the nozzle surface 5 cm, the take-up conveyor net spacing (opening width) was 6 cm, and the take-up conveyor net speed was 1 m / min. Other than that, the filament fineness obtained in the same manner as in Comparative Example 4 is 900 deniers.
The average apparent density of the elastic mesh is 0.014 g / cm
Table 2 shows the characteristics of the elastic mesh body of No. ³ . Comparative Example 7 has a fine structure and a fine structure, but is not preferable as a wadding layer for a cushioning material which is too thick and has a large depression, which is inferior in sitting comfort.

COMPARATIVE EXAMPLE 8 A nozzle having a width of 50 cm and a length of 3.3 cm was arranged in a staggered arrangement on the effective surface of the nozzle with a pitch between rows of 3 mm in the length direction and a pitch of holes of 4 mm in the width direction. Discharge amount 0.012g
Discharge at a rate of 1 minute per minute, and a take-up conveyor net is placed 5 cm below the nozzle surface, and the distance between the take-up conveyor nets (opening width)
Was 3 cm and the speed of the take-up conveyor net was 1 m / min, the filament fineness obtained in the same manner as in Comparative Example 4 was 40 denier, and the average apparent density of the elastic mesh was 0.012 g.
Table 2 shows the properties of the elastic reticulate body having a density of 1 / cm ³ . Although the comparative example 8 has a fine structure with a fineness, it is not preferable as a wadding layer for a cushioning material having a slightly inferior fineness and a large subsidence and a slightly inferior sitting comfort.

Example 5 Cardboard obtained by mixing and opening thermal bonding fiber 4-64-TE5 manufactured by Toyobo and three-dimensional crimp staple 10-64-745 manufactured by Toyobo at a weight ratio of 30/70 was used. Laminate compression was performed at 7 cm so that the apparent density was 0.05 g / cm ^3, and thermoforming was performed integrally with hot air at 200 ° C. for 10 minutes to prepare four cushion core materials having a thickness of 7 cm. The composite reticulate body obtained in Example 1 was cut into a length of 120 cm, and the cushion obtained by laminating and adhering to the surface of the cushion core material had a thickness of 10 cm and a width of 1 cm.
20 cm, 120 cm width quilted every 50 cm length,
A mattress was prepared by putting it in a side area having a length of 200 cm. This mattress was placed on a bed, and a paneler-4 person used it for 7 hours in a room at 25 ° C. RH 65% to sensory-evaluate the sleeping comfort. The bed is covered with sheets and the comforter is 1.8.
kg down / feather: 90/10 batting,
The pillow was made to be worn by a 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 made 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 sleep comfort was evaluated. It was a bad bet.

[0034]

Industrial Applicability The present invention in which filaments made of thermoplastic elastic resin having many soft segments having good vibration and stress absorption form a three-dimensional network structure and are fused and integrated, and the surface is substantially flattened. Is an elastic net that has improved vibration isolation, heat resistance and durability, bulkiness, and sitting comfort, has an appropriate compression repulsion force, and is suitable for a wadding layer for cushioning material that does not easily get damp, and is easy to recycle. And products such as vehicle seats, ship seats, vehicle seats, vehicle seats, ship beds for business use in hospitals and hotels, furniture cushions, bedding products, etc. Can be provided. Furthermore, it is also useful as an interior material and a heat insulating material for vehicles and building materials.

─────────────────────────────────────────────────── ─── Continuation of front page (51) Int.Cl. ⁷ Identification code FI D01F 6/62 303 D01F 6/62 303D 6/86 301 6/86 301B (58) Fields investigated (Int.Cl. ⁷ , DB) Name) D04H 1/00-18/00 B68G 1/00-15/00 D01D 1/00-13/02 D01F 1/00-13/04

Claims (6)

(57) [Claims] 1. A continuous filament made of a thermoplastic elastic resin having rubber elasticity having a fineness of 50 denier to 10000 denier is bent and brought into contact with each other to fuse most of the contact portion. A three-dimensional structure and the structure
Both surfaces are substantially flattened and have a thickness of 2 to
50 mm, repulsive force at 50% compression is 40 kgf / φ15
Elastic reticulate body of 0 mm or less. 2. The elastic reticulate body according to claim 1, wherein the cross-sectional shape of the continuous filaments is a hollow cross section or an irregular cross section. 3. The elastic reticulate body according to claim 1, wherein the thermoplastic elastic resin forming the 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. 4. A thermoplastic elastic resin having rubber elasticity is provided from a multi-row nozzle having a plurality of orifices with a melting point of 1
At 0 to 60 ° C. higher melting temperature, discharged downward from the nozzle, while forming a three-dimensional structure by fusing in contact with each other in a molten state, sandwiching the structure both sides with a take-up device, the A tortuous discharge of the molten state on both sides of the structure
Flatten the surface by bending the wire by 45 ° or more and deforming it
At the same time as the contact point with the discharge line that is not bent
A method for obtaining an elastic mesh body having a repulsive force of 40 kgf / φ150 mm or less at 50% compression after being bonded and forming a structure and then cooled in a cooling tank. 5. The method for producing an elastic mesh body according to claim 4, wherein once cooled, annealing is performed at a temperature of at least 10 ° C. or lower than the melting point of the thermoplastic elastic resin. 6. The method of claim 1 a vehicle seat using an elastic net body according to, marine seats, vehicle, marine, industrial and household beds de such hospital furniture chairs, office chairs And any product of the futon.