JPH07238455A - Complex elastic network material, its production and product using the same - Google Patents

Abstract

PURPOSE:To obtain a complex elastic network material, capable of cutting off the vibration, excellent in heat resistance, durability, shape retaining and cushioning properties, hardly becoming musty and suitable as a cushioning material and a product using the complex elastic network material such as a FUTON (a thick bedquilt and a mattress), furniture, a bed or a vehicular cushion and provide a method for producing the complex elastic network material. CONSTITUTION:This complex elastic network material is obtained by meandering continuous filaments, having 500 to 100000 denier size and comprising compounded two kinds of thermoplastic elastic resins, bringing the filaments into mutual contact, forming a three-dimensional steric structure layer (complex filamentous layer) in which most of the contact parts are fused, sandwiching the resultant three-dimensional steric structural layer between layers (elastic resin layers) prepared by meandering filaments, having >=100 to <=30000 denier size and comprising a single component of a thermoplastic elastic resin, bringing the filaments into mutual contact, fusing most of the contact parts and forming a three-dimensional steric structure, fusing and integrating the resultant layer even with the complex layer, substantially flattening the surface of the single layer and fusing most of the contact parts. The resultant material has >=0.01 to <=0.20g/cm<3> average apparent density. Furthermore, this method for producing the network material and its product using the same are provided.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a recyclable composite elastic mesh body having excellent cushioning property, heat resistance durability and vibration absorption property, a manufacturing method, and a futon, furniture using the composite elastic mesh body. Products related to beds, cushioning materials for vehicles, etc.

[0002]

2. Description of the Related Art Currently, as cushion materials for futons, furniture, beds, trains, automobiles, etc., urethane foam, non-elastic crimp fiber stuffed cotton, and resin cotton or hard cotton to which non-elastic crimp fiber is adhered are used. Has been done.

However, although the foamed-crosslinked urethane has good durability as a cushioning material, it is apt to be stuffy due to its poor moisture permeability and heat storage and has a heat storage property, and it is difficult to recycle because it is not thermoplastic, and is burned. The damage to the incinerator is large and the cost for removing 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.

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 cushion material. In Japanese Patent Publication No. 3-17666, there is a method in which ejection filaments having different fineness are fused to each other to form a mold, but a net-like structure which is not suitable as a cushion material. Japanese Examined Patent Publication No. 3-55583 describes a method of thinning only a very surface with a thinning device such as a rotating body before cooling. 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. JP-A-1-207
Japanese Patent Laid-Open No. 462 discloses a vinyl chloride floor mat, but it is not preferable as a cushioning material because it has poor compression recovery at room temperature and remarkably poor heat resistance. Note that no consideration is given to vibration damping in the above-mentioned structure.

[0007]

To solve the above problems,
Cushioning material for furniture, bed, and vehicle that uses a composite elastic mesh body and a manufacturing method and a composite elastic mesh body that is suitable for a cushioning material, which is excellent in heat resistance and durability, shape retention, cushioning properties The purpose is to provide such products.

[0008]

[Means for Solving the Problems] Means for solving the above problems, that is, the present invention, the continuous linear body itself has a fineness of 500 to 1000 in which two kinds of thermoplastic elastic resins are compounded.
A three-dimensional three-dimensional network structure layer in which a continuous composite linear body of 00 denier is bent and brought into contact with each other to fuse most of the contact portions to form an intermediate layer, on the other hand, a fineness composed of a thermoplastic elastic resin A three-dimensional three-dimensional network structure layer in which a continuous linear line of 100 to 30,000 denier is curved and brought into contact with each other to fuse most of the contact portions, and the intermediate layer is sandwiched from both sides to be fusion-bonded and integrated. Composite reticulated body, the surface of which is substantially flattened, and the average apparent density is 0.01 to 0.20 g / cm ³ , the composite elastic reticulated body, multiple rows having a plurality of orifices In the inner layer of the nozzle, a plurality of thermoplastic elastic resins are mixed and mixed in front of the nozzle orifice so that they can be composited, and the orifice row that is compositely distributed is sandwiched from the first row side and the last row side of the nozzle. A single-component thermoplastic elastic resin is distributed to the nozzle and discharged downward from the nozzle at a temperature 20 to 120 ° C. higher than the melting point of the low melting point resin to a temperature 10 to 50 ° C. higher than the melting point of the high melting point resin. A method for producing a composite elastic network and a method for producing a composite elastic network, characterized in that they are brought into contact with each other in a molten state and fused to form a three-dimensional structure, sandwiched by a take-up device and cooled in a cooling tank. It is a product.

The thermoplastic elastic resin in the present invention means, as the soft segment, an ether type glycol, a polyester type glycol, a polycarbonate type glycol or a long chain hydrocarbon having a molecular weight of 300 to 5,000. Polyester elastomer obtained by block-copolymerizing an olefinic compound having a carboxylic acid or a hydroxyl group at the terminal, a polyamide elastomer, a polyurethane elastomer,
Examples include polyolefin elastomers. By using a thermoplastic elastic resin, it becomes possible to regenerate by remelting, and thus recycling becomes easy. For example, as the polyester elastomer, a polyester ether block copolymer having a thermoplastic polyester as a hard segment and a polyalkylenediol as a soft segment, or a polyester ester having an aliphatic polyester as a soft segment A block copolymer can be illustrated. More specific examples of the polyester ether block copolymer include aromatic dicarboxylic acids such as terephthalic acid, isophthalic acid, naphthalene 2.6 dicarboxylic acid, naphthalene 2.7 dicarboxylic acid, and diphenyl 4.4'dicarboxylic acid. At least one of alicyclic dicarboxylic acids such as 1,4-cyclohexanedicarboxylic acid, aliphatic dicarboxylic acids such as succinic acid, adipic acid, sebacic acid dimer acid, and dicarboxylic acids selected from ester-forming derivatives thereof Seeds and aliphatic diols such as 1.4 butanediol, ethylene glycol, trimethylene glycol, tetremethylene glycol, pentamethylene glycol and hexamethylene glycol, 1.1 cyclohexane Alicyclic diols such as dimethanol and 1,4-cyclohexane dimethanol, or these Of at least one diole component selected from the ester-forming derivatives thereof and polyethylene glycol having an average molecular weight of about 300 to 5,000.
It is a ternary block copolymer composed of at least one of polyalkylene glycols such as polypropylene, polypropylene glycol, polytetramethylene glycol, and ethylene oxide-propylene oxide copolymer. The polyester ester block copolymer is a ternary block copolymer composed of at least one of the above dicarboxylic acids, diol, and polyester diol such as polylactone having an average molecular weight of about 300 to 5,000. .
Considering heat adhesion, hydrolysis resistance, stretchability, heat resistance, etc., terephthalic acid as dicarboxylic acid, or naphthalene 2.6 dicarboxylic acid, 1.4 butanediol as diole component, and poly The alkylene diol is particularly preferably a terpolymer block copolymer of polytetramethylene glycol or the terpolymer block copolymer of polylactone as the polyester diol. In a special case,
You can also use a kotatsu that has a polysiloxane-based soft segment introduced. 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, the hard segment includes nylon 6, nylon 66, nylon 610, nylon 612,
Polyethylene glycol, polypropylene glycol, polytetramethylene glycol having an average molecular weight of about 300 to 5000 is used as the soft segment in the skeleton of nylon 11, nylon 12, etc. and their copolymerized nylon.
A block copolymer composed of at least one kind of polyalkylenediol such as ethylene oxide-propylene oxide copolymer may be used alone or in combination of two or more kinds. Furthermore, blends of non-elastomer components and copolymers thereof can be used in the present invention.
The polyurethane-based elastomer is (A) number average molecular weight of 1000 to 60 in the presence or absence of a usual solvent (dimethylformamide, dimethylacetamide, etc.).
00 has a hydroxyl group-terminated polyether and / or polyester, and (B) an organic diisocyanate-based polyisocyanate as a main component.
As a typical example, a polyurethane elastomer in which a chain-extended polyamine having a diamine (C) as a main component is added to a prepolymer which is a group having a hydroxyl group can be exemplified. The polyester or polyether of (A) has an average molecular weight of about 1,000.
To 6000, preferably 1300 to 5000, polybutylene adipate copolyester, polyalkylene glycol such as polyethylene glycol, polypropylene glycol, polytetramethylene glycol and ethylene oxide-propylene oxide copolymer. Is preferred,
As the polyisocyanate of (B), a conventionally known polyisocyanate can be used, but an isocyanate mainly composed of diphenylmethane 4,4 ′ diisocyanate is used, and if necessary, a conventionally known triisocyanate. Etc. may be used in a trace amount. 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 single component layer, which is the object of the present invention, and the component having the function of absorbing vibration and stress of the composite layer is preferably 30% by weight or more, more preferably 50% by weight. From the above, from the viewpoint of heat resistance and sag resistance, 80% by weight or less is preferable, and 70% by weight is more preferable.
It is the following. That is, the content of the soft segment of the component having the vibration and stress absorbing function of the single component layer or the composite layer is preferably 30% by weight or more and 80% by weight or less, more preferably 50% by weight or more and 70% by weight or less. is there. The soft segment content of the component having the anti-compression property of the composite layer and the function of maintaining the body shape is preferably 5% by weight or more and 60
% By weight or less, more preferably 10% by weight or more and 50
It is less than or equal to weight%.

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, a preferable polyester-based thermoplastic resin of the present invention contains 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 or The content of naphthalene 2.6 dicarboxylic acid is 95 mol% or more, particularly preferably 100 mol%, and after transesterification of the glycol component, polymerization is carried out to a required degree of polymerization, and then, as a polyalkylene diol, preferably The average molecular weight is 500 or more and 5000 or less, particularly preferably 100.
When the polytetramethylene glycol of 0 or more and 3000 or less is copolymerized in an amount of 15% by weight or more and 70% by weight or less, more preferably 30% by weight or more and 60% by weight or less, the acid component of the hard segment has rigidity. When the content of a certain terephthalic acid or naphthalene 2.6 dicarboxylic acid is high, the crystallinity of the hard segment is improved, the plastic deformation is less likely to occur, and the heat resistance and sag resistance are improved. When the annealing treatment is performed at a temperature lower by at least 10 ° C. or more, the heat resistance and sag resistance is further improved. 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 (DSC) of the linear structure of the network structure treated in this manner at a temperature of room temperature or higher and melting point or lower. Anniversary
If not ringed, no endothermic peak appears in the melting curve above room temperature and below the melting point. By analogy with this,
It is also considered that the hard segments are rearranged by the ring to form pseudo-crystallization-like cross-linking points, and the heat resistance and sag resistance are improved. (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, a fineness of a composite of a plurality of thermoplastic elastic resins is 500 denier to 100,000 denier.
The three-dimensional three-dimensional structure layer (composite layer) in which most of the contact portions are fused by contacting each other by winding the linear shape of the wire, and sandwiching the three-dimensional structure layer (composite layer), the fineness of the single component thermoplastic elastic resin is 100.
A layer (single-component layer) having a three-dimensional three-dimensional structure in which filaments having a denier or more and 30,000 denier or less are meandered and brought into contact with each other to fuse most of the contact portions (mono-component layer) is also the composite layer. A composite having an average apparent density of 0.01 g / cm ³ or more and 0.20 g / cm ³ or less in which the surface of the single-component layer is substantially flattened by fusion bonding and most of the contact portion is fused. It is an elastic mesh. The composite elastic network of the present invention has a single-component layer fused and integrated on both sides of a composite layer made of a thermoplastic elastic resin, and the surface of the single-component layer is substantially flattened. The vibrations absorbed and absorbed in most of the single component layer consisting of the thermoplastic elastic resin on the front or back surface, and the vibrations that could not be absorbed in the single component layer were further absorbed and attenuated in the composite layer and sat on the seat. Or, a structure is formed that does not reach a sleeping person as much as possible, or does not generate the vibration generated by the person to the outside as much as possible. Even when a large deformation stress is locally applied, the surface of the single-component layer is substantially flattened and most of the contact portion is fused. It has the function of dispersing and absorbing the deformation stress by deforming the entire structure. Even if deformation is applied with a large stress, first, the single-component layer easily deforms and absorbs the deformation stress, and when the deformation stress is released, rubber elasticity easily restores the original form. The deformation stress that could not be absorbed by the single component layer is a deformation that does not exceed the elastic limit while exhibiting anti-compression in a composite layer with a fineness, preferably a hollow cross section or a modified cross section made of a thermoplastic elastic resin Occurs, the entire linear three-dimensional network structure fused and integrated deforms to absorb the stress, and when the stress is released, the rubber elasticity of the thermoplastic elastic resin is developed, and the structure returns to the original structure. Can be restored to form. As a result, the stress-strain curve (SS curve) at the time of compression changes the deformation strain linearly with respect to the stress, the subsidence when sitting is moderate, and the stress due to vertical movement when subjected to vibration. It is possible to impart preferable characteristics as a cushioning material capable of exhibiting a preferable shock absorber function for appropriately supporting the buttocks with a low repulsive force by appropriately sinking the change without feeling a floor. Furthermore, good sag resistance can be maintained. In the net-like body consisting of a linear cross section of a single fineness made of thermoplastic elastic resin,
If the fineness is made thin to make the touch soft, there is a drawback that it is easy to increase the subsidence due to softness when sitting and in vertical movement due to vibration, and the present invention solves the drawback that the touch becomes worse when the fineness is made thicker. It can be made soft and the body retention can be improved. With a cushioning material composed of known filaments made only of non-elastic resin, if a structure that can hold the shape is used, a marked repulsive force is exhibited and the floor feeling becomes large, and plastic deformation due to compression deformation also occurs and recovery is insufficient and heat resistance Inferior in durability. If the surface of the single-component layer is not substantially flattened, when a local external force is applied to the surface, stress concentration may be selectively generated up to the filaments and the 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-6
The structures such as those disclosed in JP-A 1-137732 and WO 91-19032 are inferior in heat resistance and durability, which is not preferable. If they are not fused, the shape cannot be maintained and the structure is not integrally deformed, so that fatigue phenomenon occurs due to stress concentration and durability is deteriorated, and at the same time, the shape is deformed and the body shape cannot be maintained, 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. If the linear fineness of the single-component layer forming the structure of the present invention is 100 denier or less, the anti-compression property becomes too low and the stress absorbability due to deformation decreases, which is not preferable. If it is more than 30,000 denier, it becomes difficult to deform, and the density of the single component layer and the surface are impaired due to the decrease in the number of constituents, so that the stress absorbing function and the stress dispersing function are deteriorated, which is not preferable. The preferred linear fineness of the monocomponent layer is 300.
Denier or more and 10,000 denier or less, more preferably 500 denier or more and 7,000 denier or less.
If the fineness of the filaments of the composite layer is 500 denier or less, the anti-compression property required for maintaining the body shape is poor, which is not preferable. 1000
When it is more than 00 denier, the individual compressive properties of the linear body are large, but the number of constituents is small and density unevenness is generated, the dispersion of force is partially deteriorated, and a remarkably large compressive force of 100 kg / cm ² or more is received. In this case, since settling due to stress concentration occurs, the use part may be limited. Preferably 800-50
000 denier, more preferably 1500-30000
Denier. 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 obtain an optimal configuration can also be selected as a preferable configuration.
The average apparent density of the elastic composite network of the present invention is 0.00
When it is 5 g / cm ³ , the repulsive force is lost and the cushioning function is hardly exhibited, which is not preferable. When it is 0.20 g / cm ³ or more, the resilience is too high and the comfort of sitting becomes unfavorable. A preferable apparent density of the elastic composite reticulate body of the present invention is 0.01 g /
cm ³ or more and 0.15 g / cm ³ or less are preferable, and more preferably 0.03 g / cm ³ or more and 0.06 g / cm ³ or less. When used as a cushioning material, the function of the cushioning layer is to increase the basic fineness and make it a little harder to support body shape, and a layer with a good vibration damping property to increase the density a little to absorb vibration and block vibration. As a slightly soft layer with a slightly finer surface and a larger number of filaments, the layer that integrates the pressure distribution of the buttocks by giving a comfortable touch to the buttocks by moderate depression is integrated. As a result, the sitting comfort can be improved by integrally deforming and absorbing stress and vibration. In the elastic composite reticulate body of the present invention, since the single component layer made of the thermoplastic elastic resin and at least three layers made of the composite layer are fused and integrated, the fineness and the apparent density of each layer can be arbitrarily changed. It is possible to impart suitable characteristics. For example, when the single-component layer is a surface layer with a fineness and the composite layer is a basic layer with a fineness, the density of the surface layer is set to be slightly high to increase the number of constituents to reduce the stress received by one filament. It is also possible to improve the sitting comfort by reducing the stress to improve the stress distribution and improving the cushioning property for supporting the buttocks. Since the surface of the single-component layer that contacts the seat frame through the basic layer is a more dense layer, it is a fine line and has a high density, so vibration and repulsive stress from the frame surface Is uniformly received in the single-component layer, and vibration and repulsive stress are energy-converted and attenuated and blocked in the entire layer. Vibrations and repulsive stress that cannot be blocked can be transformed into energy by further transforming the integrated cushion layer as a whole to improve the sitting comfort and the durability of the cushion. Further, in order to add thickness and tension to the side of the seat, the fineness can be made slightly thin to increase the density. The thickness of each layer of the composite network is not particularly limited, but when the total thickness is 100 mm, the single component layer has a thickness of 3 mm or more as a surface function to disperse force and a function to absorb vibration and deformation stress. It is preferably 40 mm or less, more preferably 5 mm or more and 20 mm or less. The thickness of the composite layer is preferably 20 mm or more and 94 mm or less, more preferably 30 mm or more and 90 mm or less, and further preferably 40 mm as a thickness capable of exerting the function of holding the figure and the function of the cushion layer.
It is 70 mm or less.

The composite form of the filaments of the composite layer constituting the elastic composite network of the present invention includes a sheath core structure or a side-by-side structure and a combination structure thereof. However, in particular, since a three-dimensional three-dimensional structure capable of energy-converting and recovering vibrations and deformation stress that cannot be energy-converted even if the single-component layer is largely deformed, the linear surface 50
Examples of the structure include a core-score structure or a side-by-side structure and a combination thereof, which is occupied by a soft thermoplastic elastic resin in which a mono-component layer is used in an amount of at least 100%. That is, see
In the score structure, the sheath component is a thermoplastic elastic resin that has a higher soft segment content than the core component, and in the side-by-side structure, the melt viscosity of the thermoplastic elastic resin that has a high soft segment content is the thermoplastic elasticity that has a low soft segment content. A structure in which the ratio of thermoplastic elastic resin, which has a large soft segment content and occupies a linear surface and is lower than the melt viscosity of the resin, is increased (metaphorically, the eccentric sheath-core structure is thermoplastic. It is particularly preferable that the proportion of the thermoplastic elastic resin occupying the linear surface is large as 80% or more, and most preferably the soft segment occupying the linear surface. 100% content of thermoplastic elastic resin with high content
And the score. 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 cross-sectional shape is not particularly limited, but by making it a hollow cross section or an irregular cross section, the filaments that compose the composite layer responsible for the cushioning function have a hollow cross section and / or an irregular cross section, thereby increasing the anti-compression property and increasing the body shape. This is preferable because the holding property can be improved. The anti-compression property can be adjusted by the modulus of the material used, and the softness of the material can increase the hollowness and the degree of irregularity to adjust the gradient of the initial compression stress, and the material with a slightly higher modulus can reduce the hollowness and the degree of irregularity to allow sitting. It gives a comfortable and anti-compression property. 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. You can
In the case of a futon, the handling property when raising and lowering is improved.
The elastic resin layer may have a hollow cross section and / or a modified cross section, if necessary, so that the touch and sitting comfort can be adjusted and the weight can be reduced.

The single component layer composed of filaments made of thermoplastic elastic resin has a substantially flat surface, and most of the contact portions are fused, so that the elastic composite reticulate body and other Other heat-adhesive components (heat-adhesive non-woven fabric, heat-adhesive fiber, heat-adhesive film, heat-adhesive, etc.) are used for adhering to heat-adhered materials such as nets, non-woven fabrics, knitted fabrics, hard cotton, films, foams and metals. (Resin, etc.) or adhesive, etc. to make an integral laminated structure, commercial seats for vehicles, seats for ships, seats for vehicles, ships, ships, hospitals, etc., household chairs, furniture chairs, office chairs, futons When a product such as a product is obtained, the contact area with the surface to be adhered can be widened, so that the product can have a wide adhesive area and can be firmly adhered to provide a product having good adhesive durability. In addition, by performing the above-mentioned pseudo-crystallization treatment at any stage of commercialization from the step of forming a composite network, the melting curve obtained by measuring the filaments made of the thermoplastic elastic resin in the structure with a 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.
The elastic composite reticulate body of the present invention can be provided with the function of a heat-adhesive layer by comprising the thermoplastic elastic resin of the single component layer having a melting point lower than that of the high melting point resin of the composite layer by 10 ° C. or more. The melting point of the thermoplastic elastic resin of the elastic resin layer that is preferable for exhibiting the function of the heat-bonding layer is 15 ° C. to 80 ° C. lower than the melting point of the high melting point resin, and more preferably 20.
The melting point is lower by 50 ° C to 50 ° C. The single-component layer composed of filaments made of thermoplastic elastic resin has a substantially flat surface, and most of the contact portions are fused to form a net, a non-woven fabric, a knitted fabric, a hard cotton. Since the contact area with the surface of the film, foam, metal, or the like to be heat-bonded can be widened, the heat-bonded area can be widened, and a new molded body that is strongly heat-bonded can be obtained. If 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 a molded body with tension and less likely to wrinkle can be obtained.

Next, the manufacturing method of the present invention will be described. According to the manufacturing method of the present invention, in the inner layer of a multi-row nozzle having a plurality of orifices, a plurality of thermoplastic elastic resins are mixed and mixed in front of the nozzle orifice so that they can be compounded, and the first row side and the last row side of the nozzle are mixed. A single-component thermoplastic elastic resin is distributed to the nozzle so as to sandwich an orifice row that is compositely distributed from the nozzle, and at a melting temperature higher than the melting point of the high melting point resin by 10 ° C. or more and lower than the melting point of the low melting point resin by less than 80 ° C. A method for producing a composite elastic mesh body, in which the composite elastic mesh body is discharged downward from the nozzle, brought into contact with each other in a molten state and fused to form a three-dimensional structure, which is sandwiched by a take-up device and cooled in a cooling tank. When forming a composite layer, multiple thermoplastic elastic resins are separately melted using a general melt extruder, and the inner row of the multi-row nozzle is combined with the composite material just before the orifice in the same manner as the general composite spinning method. The mixture is mixed and discharged so as to be discharged, and then discharged downward. See
In the score, the core component is supplied from the center, and the sheath component is merged and discharged from around the core component. On the side-by-side, the components are merged from the left and right or the front and back, and are discharged downward.
If the melting temperature at this time is higher than the melting point of the low melting point resin by 80 ° C. or more, thermal decomposition is remarkable and the rubber elastic properties of the thermoplastic elastic resin are deteriorated, which is not preferable. On the other hand, unless the melting point of the high melting point elastic resin is higher than 10 ° C., the melt melting point of the high melting point elastic resin will not be able to form normal filaments, and in the case of side-by-side, the melting viscosity of the high melting point elastic resin will be extremely high. In some cases, the resin may not be able to merge with each other, may not be able to adhere to each other, or may have significant hole bending, making it impossible to form the desired filament.In addition, the ejection filament may form a loop. Even if they come into contact with each other, the high melting point elastic resins may not be fused to each other, resulting in an elastic composite reticulate body with insufficient adhesion, which is not preferable.
Preferred melting temperatures are the same melting temperature of 20 ° C. to 60 ° C. higher than the melting point of the low melting point elastic resin and 15 ° C. to 40 ° C. higher than the melting point of the high melting point elastic resin, more preferably the low melting point elastic resin. The temperature is 30 ° C to 50 ° C higher than the melting point, and 20 ° C to 3 ° C higher than the melting point of the high melting point elastic resin.
Combined discharge is performed at the same melting temperature, which is 0 ° C. higher.
When forming a single-component layer, it is melted using a general melt extruder, or the thermoplastic elastic resin melted to form the composite layer is sandwiched between the composite layer so that the composite layer is sandwiched between the first row and the last row. From the eye side to the rows required for each orifice inside the nozzle row, the composite layer forming resin is distributed and discharged at the same melting temperature. When the same thermoplastic elastic resin is used, the desired supply amount differs between the composite layer and the single-component layer, so it is desirable to individually supply the thermoplastic elastic resin in a fixed amount by a gear pump. The shape of the orifice is not particularly limited, but the composite layer may have a hollow cross section (for example, a triangular hollow, a round hollow, a hollow with a projection, etc.) and / or an irregular cross section (for example, triangular, Y
In addition to the above effect, it is difficult for the three-dimensional structure formed by the molten discharge line to relax the flow, and conversely at the contact point It is particularly preferable because the adhesion time can be strengthened by keeping the flow time long. If necessary, the monocomponent layer can also have a modified cross section and / or a hollow cross section. 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 composite 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.
It is 0% or less, and more preferably 20% or more and 60% or less. 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 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. In the present invention, it is particularly preferable to use such a method or to reduce the single-hole discharge amount to form the single-component layer into a fine net-like structure with fine filaments. Then, the liquid is discharged downward from the nozzle, and in a molten state, they are brought into contact with each other and fused to form a three-dimensional structure, and both sides of the three-dimensional three-dimensional structure in a molten state are sandwiched by a take-up net. The bent winding filament in the molten state is bent by 45 ° or more to be deformed to flatten the surface, and at the same time, the contact point with the unbent ejection filament is adhered to form a structure, and the cooling medium is continuously formed ( Usually, it is preferable to use water at room temperature because the cooling rate can be increased and the cost can be reduced). Thus, the elastic composite reticulated body of the present invention having a three-dimensional three-dimensional reticulated structure is obtained. 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-40cm
Is preferable, and 5 cm to 20 cm is preferable when the discharge amount of the discharge filament is less than 5 g / hole. 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 performed at a temperature of at least 10 ° C. or lower than the melting point of the thermoplastic elastic resin in an arbitrary step of integrally molding and commercialization, and then heat bonding. A more preferred method is to obtain a composite network or product.
Pseudo-crystallization treatment temperature is at least 1 from melting point (Tm)
Lower than 0 ° C, Tan δ α dispersion rising temperature (Tα
cr) or higher. With this treatment, the heat resistance and sag resistance are remarkably improved as compared with those having a heat absorption peak below the melting point and having no pseudo-crystallization treatment (those having no heat absorption peak). The preferred pseudo-crystallization treatment temperature of the present invention is (Tαcr + 10
C.) to (Tm-20.degree. 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 it. 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 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.

When the elastic composite reticulate body of the present invention is used as a cushion material, it is necessary to select a resin to be used, a fineness, a loop diameter, and a bulk density depending on the purpose and site of use. For example, when used for the wadding of the surface layer, it is preferable to have a low density, a fine fineness, and a fine loop diameter in order to give a soft touch, an appropriate subsidence, and a bulge with tension. In order to lower the resonance frequency, linearly change the appropriate hardness and hysteresis at the time of compression to improve body retention, and to maintain durability, medium density, thick fineness, and slightly large ru Diameter is preferred. 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, for example, a hard cotton cushion material made of a short fiber aggregate, a non-woven fabric, etc., in order 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. Endothermic peak (melting peak) from melting point (Tm) and endothermic peak below melting point TA50, DSC50 type differential thermal analyzer manufactured by Shimadzu ) 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 temperature rising rate of 1 ° C./min. Tan δ (ratio M ″ / imaginary elastic modulus M ″ to real part M ′ of elastic modulus) The rising temperature of α dispersion corresponding to the transition temperature from the rubber elastic region to the melting region of M ′). Apparent Density The 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) Fineness of filaments Each filament portion is cut out from 10 points of the sample, embedded in acrylic resin, the 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 Fusing Whether or not the sample is fused by visual judgment depends on whether or not the fibers adhering to each other cannot be pulled apart by hand It is determined that something that does not come off is fused. Heat resistance and durability (residual strain at 70 ° C) Cut a sample into a size of 15 cm x 15 cm, compress it by 50%, leave it in dry heat at 70 ° C for 22 hours, then cool to remove compression strain and leave it for 1 day (b) Is 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 The sample is made into a size of 15 cm × 15 cm. Cut and use Shimadzu's Servo Pulsar-50% in 25% 65% RH room
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) Sitting comfort Thermal bonding fiber 4-64-TE5 manufactured by Toyobo and three-dimensional crimp staple 10-64-745 manufactured by Toyobo are mixed and opened at a weight ratio of 30/70. An average apparent bulk density of 0.05 g / cm when the card web obtained by fiberizing is cut as a core of a bucket sheet and a cushion is formed so as to wrap both sides and sides of a flame-retardant reticulate structure having a thickness of 5 cm. Laminate to ³ and put into a thermoforming female mold, compress with an oyster mold and stuff 20
A cushion was molded by heat-bonding with hot air at 0 ° C for 10 minutes to form a bucket sheet, covered with a side of polyester moquette made of Toyobo Co., Ltd., and set on a seat frame to create a seat. 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).

Example 1 As a polyester elastomer, dimethyl terephthalate (DMT) or dimethyl naphthalate (DM) was used.
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]

On the nozzle effective surface having a width of 50 cm and a length of 5 cm, the first to fifth rows in the length direction have a hole-to-hole pitch of 5 mm in the width direction, the hole-to-hole pitch of 3 mm in the length direction, and the sixth to 11th rows. Is a pitch between holes in the width direction of 10 mm, a pitch between holes in the length direction of 5 mm, 12
Rows 14 to 14 have a zigzag arrangement with a hole-to-hole pitch of 5 mm in the width direction and a hole-to-hole pitch of 3 mm in the length direction. Orifice shapes in rows 6 to 11 are 2.5 mm outer diameter and 1.8 mm inner diameter. The nozzle having a triple bridge hollow forming cross section and the other orifice having a round hole cross section of φ0.8 mm was used, and the resulting thermoplastic elastic resin raw materials A-1 and A-2 were used in a weight ratio of 50/5.
Supply from the 6th row to the 11th row of the nozzle so that it becomes 0,
Immediately before the orifice, A-1 was used as a sheath and A-2 was used as a core so as to be mixed and mixed, and discharged at a melting temperature of 245 ° C. at a discharge rate of 2 g / min per single hole to form a composite layer. The obtained thermoplastic elastic resin raw material A-1 was supplied as a single component to the first to fifth rows and the twelfth to fourteenth rows, and the discharge amount per single hole was 0.8 g / Discharge in minutes to discharge below the nozzle as a single-component layer, place cooling water 12 cm below the nozzle surface, and use stainless steel endless nets with a width of 60 cm parallel to each other with a pair of take-up conveyors at intervals of 5 cm. It is arranged so that it will come out partly, and then it is pulled out, and while the contact parts are fused, both sides are sandwiched and drawn into cooling water at 25 ° C at a speed of 1 m / min to solidify, then 100
Table 2 shows the properties of the elastic composite reticulate body obtained by quasi-crystallization for 20 minutes in a hot air drier at 0 ° C. and cutting into a predetermined size. The composite layer of Example 1 has a triangular cross-sectional shape of a hollow cross section having a sheath of A-1 resin and a core of A-2 with a hollow ratio of 40% and a fineness of 9000 denier. The single-component layer has a fineness of solid round cross section of 350
It was formed from 0 denier filaments, and the average apparent density of the reticulate body was 0.05 g / cm ³ . As is clear from Table 2, Example 1 was a cushioning material excellent in heat resistance, durability at room temperature, and sitting comfort. It can be seen that the seat created for evaluation also has excellent performance.

[0021]

[Table 2]

Example 2 20 mol of DMT or dimethyl isophthalate (DMI)
% And DMT 80 mol% and 1.4 butanediol (1.
4BD) was charged with a small amount of catalyst and the same as in Example 1.
The formulation of the polyester-based thermoplastic elastic resin obtained in
Shown in 1. Form the hole shape of the orifice that forms the composite layer
The composite layer uses a nozzle with a round cross section with a diameter of 1 mm.
Distributes A-4 and the core distributes A-3, and A-4 is distributed in the single component layer.
Example except dispensing and discharging at a melting temperature of 240 ° C.
The properties of the elastic composite network obtained in the same manner as in No. 1 are shown in Table 2.
You The composite layer has a solid round cross section and a fineness.
It is made of 9000 denier filaments, and the single component layer is medium
The fineness of the actual round section is formed from filaments of 3600 denier
And the average apparent density of the mesh is 0.05 g / cm ³
Met. As is clear from Table 2, Example 2 has heat resistance.
Durability at room temperature can be used practically and has excellent sitting comfort
It was a cushion material. The seats created for evaluation are also excellent
It is understood that there is.

Example 3 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 obtained thermoplastic elastic resin is B-1 for the sheath component and the single component layer of the composite layer, and B for the core component of the composite layer.
Table 2 shows the characteristics of the elastic composite reticulate body obtained in the same manner as in Example 1 except that the melting temperature was 220 ° C. The composite layer of Example 3 was formed with a linear cross section of a triangular rice ball type hollow cross section having a hollow ratio of 41% and a fineness of 9300 denier, and the single-component layer had a solid round cross section. Has a fineness of 3
It was formed from 900 denier filaments, and the average apparent density of the reticulate body was 0.05 g / cm ³ . Example 3
Was a cushioning material with excellent heat resistance, durability at room temperature, and sitting comfort. It can be seen that the seat created for evaluation is also excellent.

Comparative Examples 1 and 2 Polyethylene terephthalate-polyethylene isophthalate copolymerized polyester (PES) containing 50 mol% of isophthalic acid and having an intrinsic viscosity of 0.65 was used as a resin constituting the composite linear layer. -A polyethylene terephthalate (PET) with an intrinsic viscosity of 0.63 as the core component and polyethylene (PE) with a melt index of 15 as the sheath component.
Polypropylene (PP) having a melt index of 12 is distributed to the core component, PES and PE are distributed to a layer corresponding to the elastic resin layer, and the melting temperature is 280 ° C. and 2
Example 2 except that the temperature was set to 50 ° C. and the pseudo crystallization treatment was not performed.
The fineness of the composite filament layer obtained in the same manner as in Comparative Example 1 was 880.
0 denier, Comparative Example 2 was 13000 denier, and the fineness of the filaments of the layer corresponding to the elastic resin layer was 3600 denier in Comparative Example 1 and 9500 denier in Comparative Example 2, with an average apparent appearance. Table 2 shows the properties of the composite reticulate body with both densities of 0.05 g / cm ^3.
Shown in. Comparative Example 1 is an example which is not suitable for a cushion material which is poor in heat resistance and durability, hard and uncomfortable to sit on, because it is a composite reticulate body made of non-elastic polyester having a slightly small fineness. Comparative Example 2 is a composite linear structure composed of a non-elastic olefin with a slightly thicker fineness, and therefore has poor heat resistance and durability, and is slightly softer than Comparative Example 1, but is harder than the softness required for a seat and suitable for a cushioning material. Not an example.

Comparative Example 3 Example 2 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 out.
Some of the properties of the elastic composite network obtained in the same manner as in Table 2 are shown in Table 2.
Shown in. In addition, since the adhesion state is poor and the shape retention is poor,
Apparent density, residual strain at 70 ° C., repeated compressive strain, and sitting comfort were not evaluated. Comparative Example 3 is an example that is not suitable for a cushioning material that cannot have a body shape holding function because its shape is not fixed.

COMPARATIVE EXAMPLE 4 On the effective surface of the nozzle having a width of 50 cm and a length of 5 cm, the first to fifth rows and the fourteenth to 17th rows are arranged in the length direction with an inter-row pitch of 3
mm, the inter-hole pitch is 4 mm in the width direction, the inter-row pitch is 6 mm from the sixth row to the 13 th row, and the inter-hole pitch is 5 mm in the width direction. Discharge at a discharge rate of 0.09 g / min per single hole to the 6th to 13th row portions forming a layer to form a single component layer 1st to 5th row and 14th to 17th row Discharge at a rate of 0.02 g / min per hole, and place a take-up conveyor net under the nozzle surface 4 cm to 0.1 m.
The fineness of the filaments forming the composite layer obtained in the same manner as in Comparative Example 3 was 410 denier, and the filament of the filaments forming the single-component layer had a fineness of 96 denier, except that the filaments were collected at a rate of 1 / min. The properties of the elastic composite network having an average apparent density of 0.031 g / cm ³ are shown in Table 2. Comparative Example 4 is an example which cannot be used as it is as a cushioning material because it has a dense structure and the fineness is remarkably thin.

Comparative Example 5 On the effective surface of the nozzle having a width of 50 cm and a length of 5 cm, the 1st to 4th rows and the 10th to 11th rows are arranged in the length direction with an inter-row pitch of 5
mm, the inter-hole pitch in the width direction is 10 mm, the inter-row pitch is 6 mm in the sixth to ninth rows, and the inter-hole pitch is 12.5 in the width direction.
Discharge from a nozzle having a circular cross-section orifice of staggered arrangement of mm at a melting temperature of 285 ° C. at a discharge rate of 26 g / min per single hole from the sixth row to the ninth row forming the composite layer. , 1st to 5th rows and 10 forming a single component layer
Comparative Example 3 except that a discharge amount of 7 g / min per single hole was discharged from the 11th to 11th columns, and a take-up conveyor net was arranged below the nozzle surface 25 cm to take out at 2.5 m / min.
The fineness of the filaments forming the composite layer obtained in the same manner as
7,000 denier, the fineness of the filaments forming the single-component layer is 3
At 1500 denier, the average apparent density is 0.12 g /
The properties of the elastic composite network of cm ³ are shown in Table 2. Comparative Example 5 is an example in which the fineness is remarkably thick, the density unevenness is present, and the heat-resistant durability is deteriorated due to the hard elastic composite reticulate body, and the sitting comfort is also deteriorated.

Comparative Examples 6 to 7 The take-up conveyor net speed was 10 m / min and 0.21.
Table 2 shows the properties of the elastic composite reticulate body obtained in the same manner as in Comparative Example 3 except that it was collected at 0 m / min. In Comparative Example 6, the composite layer has a fineness of 8700 denier and the single-component layer has a fineness of 35.
00 denier, apparent density of elastic composite network is 0.00
Since it is as low as 5 g / cm ³ , the heat resistance and durability are good, but it is an example which is not suitable for a cushioning material that is too soft and extremely uncomfortable to sit on. In Comparative Example 7, the fineness of the composite layer was 9400 denier, the fineness of the single component layer was 3800 denier, and the apparent density of the elastic composite reticulate body was 0.25 g / cm ³ and thus the heat resistance was high. This is an example that is not suitable for a cushioning material that is slightly inferior and hard to sit because it is hard.

Comparative Example 8 A-4 was used alone as a thermoplastic elastic resin, and without forming a composite structure, the sixth to eleventh rows of the nozzle were discharged as a single component with a single component at a melting temperature of 220 ° C. per single hole. The filament fineness of the portion corresponding to the composite layer obtained in the same manner as in Example 3 was 9200, except that discharge was performed at 2 g / min and no pseudo-crystallization treatment was performed.
Denier, the linear fineness of the portion corresponding to the single component layer is 380
An elastic composite reticulate having an apparent density of 0 denier of 0.051 g / cm ³ was obtained. Table 2 shows the properties of the obtained elastic composite network. Comparative Example 8 is an example in which the linear structure is not composite-structured and the pseudo-crystallization treatment is not performed, and the sitting comfort is slightly inferior and the heat resistance and durability are inferior to those in Example 2.

COMPARATIVE EXAMPLE 9 A stainless steel endless net having a width of 60 cm was placed in parallel with each other.
Elasticity with an average apparent density of 0.04 g / cm ³ obtained in the same manner as in Example 3 except that a pair of take-up conveyors were arranged at intervals of cm so that they partially appeared on the water surface and no pseudo-crystallization treatment was performed. As a result of evaluating the composite reticulate body, since the surface of the single-component layer is not flattened, the sitting comfort is slightly worse than in Example 2, and the heat resistance and durability are reduced to the practical use limit.

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.
The card web obtained by mixing and opening at a weight ratio of / 70 is laminated and compressed on both sides so that the total weight is 0.05 g / cm ³ and then 2
Four cushions each having a thickness of 7 cm were formed by integrally thermoforming with hot air of 00 ° C. for 10 minutes. Thickness of the obtained cushion is 1
A mattress was prepared by quilting every 0 cm, width 120 cm, and length 50 cm, and putting the mattress on 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.

[0034]

EFFECTS OF THE INVENTION A single component layer and a part of a composite layer are composed of a thermoplastic elastic resin having many soft segments having good vibration and stress absorption, and a part of the composite layer is composed of an anti-compressible thermoplastic elastic resin. The elastic composite reticulate body of the present invention, which is formed by fusing and is integrated by fusion, is a cushioning material having an appropriate compression repulsion force which is further improved in vibration isolation, heat resistance durability, bulkiness, and sitting comfort, and which does not easily get damp. A suitable elastic composite mesh body that is easy to recycle, and a vehicle seat, a marine seat, which has the above-mentioned preferable characteristics by being used alone or in combination with other materials because its surface is substantially flattened. Products such as vehicles, ships, commercial beds for 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 the front page (51) Int.Cl. ⁶ Identification number Office reference number FI technical display location // D01F 6/62 303 D 6/86 301 B

Claims (7)

[Claims] 1. The continuous linear body itself is a continuous composite linear body having a fineness of 500 to 100,000 denier in which two kinds of thermoplastic elastic resins are compounded, and the continuous linear linear bodies are made to meander and come into contact with each other to make contact with each other. Most of the three-dimensional three-dimensional network structure layer fused is used as the middle layer, while meanwhile, continuous linear lines made of a thermoplastic elastic resin having a fineness of 100 to 30000 denier are bent and brought into contact with each other to make contact with each other. It is a composite network body in which the middle layer is laminated and fusion-bonded so as to sandwich the middle layer from both sides by a three-dimensional three-dimensional network structure layer which is mostly fused, and the surface is substantially flattened, and the average apparent density is 0. .01
Composite elastic meshwork, which is a ~0.20g / cm ^3. 2. The composite elastic mesh body according to claim 1, wherein the continuous composite linear shape has a hollow cross section or an irregular cross section. 3. The composite elastic network according to claim 1, wherein the thermoplastic elastic resin is a polyester elastomer and the thermoplastic non-elastic resin is a phosphorus-containing flame retardant polyester. 4. The composite elastic reticulate according to claim 1, wherein the thermoplastic elastic resin forming the continuous linear body has an endothermic peak at a temperature above room temperature and below the melting point in a melting curve measured by a differential scanning calorimeter (DSC). body. 5. The inner layer of a multi-row nozzle having a plurality of orifices is divided and mixed before the nozzle orifice so that a plurality of thermoplastic elastic resins can be compounded, and the first row side and the last row side of the nozzle. A single component thermoplastic elastic resin is distributed to the nozzle so as to sandwich the orifice row that has been compositely distributed from, and the temperature is 20 to 120 ° C. higher than the melting point of the low melting point resin to 10 to 50 ° C. higher than the melting point of the high melting point resin. A composite elastic reticulate body, which is discharged downward from the nozzle at a temperature, is brought into contact with each other in a molten state and fused to form a three-dimensional structure, and is sandwiched by a take-up device and cooled in a cooling tank. Manufacturing method. 6. After annealing, the thermoplastic elastic resin is annealed at a temperature of at least 10 ° C. or lower.
A method for producing the described composite elastic network. 7. A product according to any one of a vehicle seat, a boat seat, a bed, a chair, a sofa, a mattress, a bedding, and furniture, which uses the composite elastic mesh body according to claim 1.