The purpose of the present invention is to provide a vehicle seat which is not susceptible to permanent deformation and has high durability. This cushion material (1) comprises: a first cushion body (2); and a second cushion body (3) which is disposed above the first cushion body (2) and covers at least the upper surface of the first cushion body (2), the cushion material (1) being characterized in that the first cushion body (2) includes a three-dimensional net-like structure in which loops are formed by partially welding continuous filaments of a thermoplastic resin in an irregular manner, and the second cushion body (3) is made of a vertical nonwoven fabric in which fibers are oriented in the thickness direction.
B32B 5/26 - Layered products characterised by the non-homogeneity or physical structure of a layer characterised by the presence of two or more layers which comprise fibres, filaments, granules, or powder, or are foamed or specifically porous one layer being a fibrous or filamentary layer another layer also being fibrous or filamentary
A three-dimensional net-like structure is provided that has a soft cushioning property and less variations of hardness and is less expensive.
The three-dimensional net-like structure is made from a thermoplastic resin including a mixture of a polypropylene copolymer (a) and a polypropylene copolymer (b) and has a spring structure formed by bonding continuous filaments partly in random in loops. The polypropylene copolymer (a) has a flexural modulus that is different from a flexural modulus of the polypropylene copolymer (b).
D04H 3/14 - Non woven fabrics formed wholly or mainly of yarns or like filamentary material of substantial length characterised by the method of strengthening or consolidating with bonds between thermoplastic yarns or filaments produced by welding
D04H 3/07 - Non woven fabrics formed wholly or mainly of yarns or like filamentary material of substantial length characterised by the method of forming fleeces or layers, e.g. reorientation of yarns or filaments otherwise than in a plane, e.g. in a tubular way
With regard to a care bed provided with a three-dimensional net-like structure made of a thermoplastic resin, an object is to smoothly bend the three-dimensional net-like structure in multiple stages in response to a complicated motion of a bed main body or a user's specific motion. A three-dimensional net-like structure 101 includes a first three-dimensional sparse/dense structure 1 provided as an alternately layered configuration of structural units 1a1 to 1a9 that are sparse in an extrusion direction Y and structural units 1b1 to 1b8 that are dense in the extrusion direction Y. In this first three-dimensional sparse/dense structure 1, a bulk density δ1 of the sparse structural units 1a1 to 1a9 is 0.01 to 0.08 g/cm3 and a bulk density δ2 of the dense structural units 1b1 to 1b8 is 0.03 to 0.10 g/cm3. A ratio δ2/δ1 of the bulk density of the dense structural units 1b1 to 1b8 to the bulk density of the sparse structural units 1a1 to 1a9 is 1.01 to 5. A length A1 of the sparse structural units 1a1 to 1a9 is 1 to 50 cm, and a length A2 of the dense structural units 1b1 to 1b8 is 3 to 60 cm. A ratio A2/A1 of the length of the dense structural units 1b1 to 1b8 to the length of the sparse structural units 1a1 to 1a9 is 0.1 to 10.
A47C 27/12 - Spring, stuffed or fluid mattresses specially adapted for chairs, beds or sofas with fibrous inlays, e.g. made of wool, of cotton
D04H 3/16 - Non woven fabrics formed wholly or mainly of yarns or like filamentary material of substantial length characterised by the method of strengthening or consolidating with bonds between thermoplastic yarns or filaments produced by welding with bonds between thermoplastic filaments produced in association with filament formation, e.g. immediately following extrusion
Provided is an inexpensive three-dimensional net-shaped structure body having soft cushioning properties and little variations in hardness. The three-dimensional net-shaped structure body has a spring structure comprising a thermoplastic resin containing a mixture of a polypropylene-based copolymer (a) and a polypropylene-based copolymer (b), with loops being formed by continuous filaments being welded partially at random. The flexural modulus of the polypropylene-based copolymer (a) is different from the flexural modulus of the polypropylene-based copolymer (b).
D04H 3/14 - Non woven fabrics formed wholly or mainly of yarns or like filamentary material of substantial length characterised by the method of strengthening or consolidating with bonds between thermoplastic yarns or filaments produced by welding
A47C 27/12 - Spring, stuffed or fluid mattresses specially adapted for chairs, beds or sofas with fibrous inlays, e.g. made of wool, of cotton
D04H 3/07 - Non woven fabrics formed wholly or mainly of yarns or like filamentary material of substantial length characterised by the method of forming fleeces or layers, e.g. reorientation of yarns or filaments otherwise than in a plane, e.g. in a tubular way
A47C 27/12 - Spring, stuffed or fluid mattresses specially adapted for chairs, beds or sofas with fibrous inlays, e.g. made of wool, of cotton
D04H 3/16 - Non woven fabrics formed wholly or mainly of yarns or like filamentary material of substantial length characterised by the method of strengthening or consolidating with bonds between thermoplastic yarns or filaments produced by welding with bonds between thermoplastic filaments produced in association with filament formation, e.g. immediately following extrusion
Cushions for medical purposes; pillows for medical purposes;
mattresses for medical purposes; beds specially made for
medical purposes. Cushions; Japanese floor cushions [Zabuton]; pillows;
mattresses; beds. Mosquito nets; bedsheets; futon quilts; covers for futon
quilts; Futon ticks [unstuffed Futon]; pillow cases;
blankets. Sweaters; shirts for suits; nightwear; underwear.
A three-dimensional striped structure is provided which is formed by bonding continuous filaments in random in loops, has a longitudinal direction corresponding to an extruding direction, a lateral direction and a thickness direction perpendicular to the extruding direction, and is comprised of a polyethylene thermoplastic resin, a polyester thermoplastic elastomer or a mixture of a polyethylene thermoplastic resin and a polyethylene thermoplastic elastomer. The three dimensional striped structure has an impact resilience of not lower than 13 cm, a hysteresis loss of not higher than 34% and not lower than 13%, and a thermal expansion rate of 0 to 8% in the longitudinal direction before and after a hot-air drying test, and does not shrink during high-temperature sterilization.
D04H 3/03 - Non woven fabrics formed wholly or mainly of yarns or like filamentary material of substantial length characterised by the method of forming fleeces or layers, e.g. reorientation of yarns or filaments at random
B33Y 80/00 - Products made by additive manufacturing
D04H 3/16 - Non woven fabrics formed wholly or mainly of yarns or like filamentary material of substantial length characterised by the method of strengthening or consolidating with bonds between thermoplastic yarns or filaments produced by welding with bonds between thermoplastic filaments produced in association with filament formation, e.g. immediately following extrusion
B29C 47/00 - Extrusion moulding, i.e. expressing the moulding material through a die or nozzle which imparts the desired form; Apparatus therefor (extrusion blow-moulding B29C 49/04)
B29C 47/88 - Heating or cooling the stream of extruded material
Provided is a three-dimensional crosspiece structure in which a loop is formed by a continuous filament being partially welded in a random manner, which has a longitudinal direction that corresponds to the direction of extrusion and a transverse direction and a thickness direction that are perpendicular to the direction of extrusion, and which comprises a polyethylene-based thermoplastic resin, a polyester-based thermoplastic elastomer or a mixture of a polyethylene-based thermoplastic resin and a polyethylene-based thermoplastic elastomer, wherein the three-dimensional crosspiece structure has a rebound resilience of 13 cm or more, a hysteresis loss of not greater than 34% and not less than 13%, and a thermal elongation rate in the longitudinal direction of 0-8% before and after a hot air drying test. The three-dimensional crosspiece structure has a hysteresis loss and elasticity characteristics that are suitable for characteristics of the human body, and does not shrink when subjected to high temperature disinfection or the like.
An object is to provide a hygienic cushion that has an adequate thickness to provide the repulsive force of or above a specified level and the body-holding property, is light in weight, has excellent air permeability and is washable with water. The core material for cushion 1 comprising the three-dimensional net-like structure, which is comprised of a polyethylene thermoplastic resin, a polyester thermoplastic elastomer or a mixture of a polyethylene thermoplastic resin and a polyethylene thermoplastic elastomer. The three-dimensional net-like structure has a first layer that includes a thermoplastic resin and a second layer that is stacked on a single surface or both surfaces of the first layer and includes a thermoplastic resin different from the thermoplastic resin of the first layer. The three dimensional net-like structure has an impact resilience of not lower than 13 cm, a hysteresis loss of not higher than 34% and not lower than 13%, and a thermal expansion rate of 0 to 8% in the longitudinal direction before and after a hot-air drying test that is performed at a temperature of 90° C. for 30 minutes with regard to the polyethylene thermoplastic resin, that is performed at a temperature of 130° C. for 30 minutes with regard to the polyester thermoplastic elastomer and that is performed at a temperature of 90° C. for 30 minutes with regard to the mixture of the polyethylene thermoplastic resin and the polyethylene thermoplastic elastomer.
A47C 27/00 - Spring, stuffed or fluid mattresses specially adapted for chairs, beds or sofas
A47C 27/12 - Spring, stuffed or fluid mattresses specially adapted for chairs, beds or sofas with fibrous inlays, e.g. made of wool, of cotton
D04H 3/16 - Non woven fabrics formed wholly or mainly of yarns or like filamentary material of substantial length characterised by the method of strengthening or consolidating with bonds between thermoplastic yarns or filaments produced by welding with bonds between thermoplastic filaments produced in association with filament formation, e.g. immediately following extrusion
D04H 3/03 - Non woven fabrics formed wholly or mainly of yarns or like filamentary material of substantial length characterised by the method of forming fleeces or layers, e.g. reorientation of yarns or filaments at random
B32B 5/18 - Layered products characterised by the non-homogeneity or physical structure of a layer characterised by features of a layer containing foamed or specifically porous material
B32B 7/02 - Physical, chemical or physicochemical properties
B32B 27/08 - Layered products essentially comprising synthetic resin as the main or only constituent of a layer next to another layer of a specific substance of synthetic resin of a different kind
B32B 27/20 - Layered products essentially comprising synthetic resin characterised by the use of special additives using fillers, pigments, thixotroping agents
The present invention provides a hygienic cushion which can be washed in water, exhibits excellent air permeability, and is light while exhibiting body-shape retention and exerting a resiliency force no less than a given standard at an appropriate thickness. A core material (1) for a cushion, wherein: one surface or both surfaces of a first layer in a three-dimensional mesh structure, said first layer being formed from a polyethylene-based thermoplastic resin, a polyester-based thermoplastic elastomer, or a mixture of a polyethylene-based thermoplastic resin and a polyethylene-based thermoplastic elastomer, is/are laminated with a second layer containing a thermoplastic resin that is different from that of the first layer; the three-dimensional mesh structure has an impact resilience of 13 cm or greater and a hysteresis loss of 13-34%; and the thermal elongation rate of the three-dimensional mesh structure in the lengthwise direction before and after a hot-air drying test is 0-8% after 30 minutes at 90°C in the case of a polyethylene-based thermoplastic resin, after 30 minutes at 130°C in the case of a polyester-based thermoplastic elastomer, or after 30 minutes at 90°C in the case of a mixture of a polyethylene-based thermoplastic resin and a polyethylene-based thermoplastic elastomer.
B32B 5/26 - Layered products characterised by the non-homogeneity or physical structure of a layer characterised by the presence of two or more layers which comprise fibres, filaments, granules, or powder, or are foamed or specifically porous one layer being a fibrous or filamentary layer another layer also being fibrous or filamentary
D04H 1/4374 - Non-woven fabrics formed wholly or mainly of staple fibres or like relatively short fibres from fleeces or layers composed of fibres without existing or potential cohesive properties characterised by the use of certain kinds of fibres insofar as this use has no preponderant influence on the consolidation of the fleece using different kinds of webs, e.g. by layering webs
D04H 3/16 - Non woven fabrics formed wholly or mainly of yarns or like filamentary material of substantial length characterised by the method of strengthening or consolidating with bonds between thermoplastic yarns or filaments produced by welding with bonds between thermoplastic filaments produced in association with filament formation, e.g. immediately following extrusion
12.
Apparatus and method for manufacturing three-dimensional net-like structure
D04H 3/03 - Non woven fabrics formed wholly or mainly of yarns or like filamentary material of substantial length characterised by the method of forming fleeces or layers, e.g. reorientation of yarns or filaments at random
D04H 3/037 - Non woven fabrics formed wholly or mainly of yarns or like filamentary material of substantial length characterised by the method of forming fleeces or layers, e.g. reorientation of yarns or filaments at random reorientation by liquid
D04H 3/16 - Non woven fabrics formed wholly or mainly of yarns or like filamentary material of substantial length characterised by the method of strengthening or consolidating with bonds between thermoplastic yarns or filaments produced by welding with bonds between thermoplastic filaments produced in association with filament formation, e.g. immediately following extrusion
B29C 47/00 - Extrusion moulding, i.e. expressing the moulding material through a die or nozzle which imparts the desired form; Apparatus therefor (extrusion blow-moulding B29C 49/04)
B29C 47/88 - Heating or cooling the stream of extruded material
D04H 3/033 - Non woven fabrics formed wholly or mainly of yarns or like filamentary material of substantial length characterised by the method of forming fleeces or layers, e.g. reorientation of yarns or filaments at random reorientation immediately after yarn or filament formation
Cushions for medical purposes; pillows for medical purposes;
mattresses for medical purposes; beds for medical purpose. Cushions; zubuton (Japanese floor cushions); pillows;
mattresses, beds; packaging containers of plastic; cushions
for household pets; mattresses for household pets; beds for
household pets.
Mattresses for medical purposes; pillows for medical
purposes; cushions for medical purposes; beds for medical
purposes. Cushions; zabuton (Japanese floor cushions); pillows;
mattresses; beds.
A47C 31/00 - Details or accessories for chairs, beds, or the like, not provided for in other groups of this subclass, e.g. upholstery fasteners, mattress protectors, stretching devices for mattress nets
A47C 27/12 - Spring, stuffed or fluid mattresses specially adapted for chairs, beds or sofas with fibrous inlays, e.g. made of wool, of cotton
A47C 31/00 - Details or accessories for chairs, beds, or the like, not provided for in other groups of this subclass, e.g. upholstery fasteners, mattress protectors, stretching devices for mattress nets
A47C 27/12 - Spring, stuffed or fluid mattresses specially adapted for chairs, beds or sofas with fibrous inlays, e.g. made of wool, of cotton
Cushions for medical purposes; pillows for medical purposes; mattresses for medical purposes; beds for medical purpose Cushions; Japanese floor cushions, namely, zubuton; pillows; mattresses, beds; packaging containers of plastic; cushions for household pets; mattresses for household pets; beds for household pets
Medical products, namely, therapeutic mattresses, beds, and cushions; pillows made of thermoplastic resin for prevention, treatment and care of pressure ulcers and compression sores for medical purposes Cushions; Japanese floor cushions (zabuton); pillows; mattresses; beds
A method for forming cushions including the following four steps: (1) a compression step in which the structure (2) is compressed in a mold (3); (2) a thermal softening step in which the structure (2) is thermally softened by means of a heating medium; (3) a curing step in which the structure (2) directly undergoes forced cooling in a cooling medium, and is then cured; and (4) a mold release step in which the structure (2) is released from the mold (3).
D04H 3/14 - Non woven fabrics formed wholly or mainly of yarns or like filamentary material of substantial length characterised by the method of strengthening or consolidating with bonds between thermoplastic yarns or filaments produced by welding
B29D 99/00 - Subject matter not provided for in other groups of this subclass
D04H 3/16 - Non woven fabrics formed wholly or mainly of yarns or like filamentary material of substantial length characterised by the method of strengthening or consolidating with bonds between thermoplastic yarns or filaments produced by welding with bonds between thermoplastic filaments produced in association with filament formation, e.g. immediately following extrusion
B29C 43/00 - Compression moulding, i.e. applying external pressure to flow the moulding materialApparatus therefor
B29C 39/00 - Shaping by casting, i.e. introducing the moulding material into a mould or between confining surfaces without significant moulding pressureApparatus therefor
B29L 31/58 - Upholstery or cushions, e.g. vehicle upholstery or interior padding
20.
DEVICE FOR MANUFACTURING THREE-DIMENSIONAL NETWORK STRUCTURE AND METHOD FOR MANUFACTURING THREE-DIMENSIONAL NETWORK STRUCTURE
The purpose of the present invention is to improve production efficiency of a three-dimensional network structure while maintaining the quality of the three-dimensional network structure surface. A second chute (6) is disposed between the first chutes (4a, 4b) at the lower part of an unformed area (33). Threads (20a, 20b) positioned in longitudinal-side parts (22b, 22c) on the outside of aggregates (21a, 21b) are in contact with sloped surfaces (46a, 46b) of the second chute (6), the vertical downward trajectory thereof being disrupted, and, while interlocking with adjacent threads (20a, 20b) in loop shapes, are cooled by water supplied from openings (51a, 51b, 51c) and pass between first chutes (4a, 4b) and the second chute (46a, 46b).
D04H 3/16 - Non woven fabrics formed wholly or mainly of yarns or like filamentary material of substantial length characterised by the method of strengthening or consolidating with bonds between thermoplastic yarns or filaments produced by welding with bonds between thermoplastic filaments produced in association with filament formation, e.g. immediately following extrusion
D04H 3/033 - Non woven fabrics formed wholly or mainly of yarns or like filamentary material of substantial length characterised by the method of forming fleeces or layers, e.g. reorientation of yarns or filaments at random reorientation immediately after yarn or filament formation
21.
COMPRESSIBLE FRAMEWORK-LIKE STRUCTURE, COMPRESSIBLE/RESTORABLE FRAMEWORK-LIKE STRUCTURE, METHOD FOR COMPRESSING FRAMEWORK-LIKE STRUCTURE, AND METHOD FOR COMPRESSING AND RESTORING FRAMEWORK-LIKE STRUCTURE
Framework-like structures suffer from a problem in that transport costs are increased because bulk density is low. A mattress (1) composed of a framework-like structure is placed in a bag (2) for compression, a zipper of the bag (2) for compression is closed, a suction port of a suction device such as a vacuum cleaner is brought into contact with a non-return valve and air is suctioned out to thereby place and seal the mattress, which is in a compressed state, in a vacuum state and compress the thickness of the mattress (1). An airtight state at 65°C is subsequently maintained inside a container during transport. After transport, the zipper of the bag (2) for compression is opened, and the mattress (1) having been extracted from the bag (2) for compression is placed in a hot-air tank and restored in an atmosphere of 85°C.
A47C 27/12 - Spring, stuffed or fluid mattresses specially adapted for chairs, beds or sofas with fibrous inlays, e.g. made of wool, of cotton
D04H 3/16 - Non woven fabrics formed wholly or mainly of yarns or like filamentary material of substantial length characterised by the method of strengthening or consolidating with bonds between thermoplastic yarns or filaments produced by welding with bonds between thermoplastic filaments produced in association with filament formation, e.g. immediately following extrusion
22.
Three-dimensional net-shaped structure and method and apparatus for manufacturing thereof
A manufacturing apparatus of three-dimensional net-like structure includes: a nozzle with a plurality of extrusion holes that are arrayed to extrude and drop downward a thermoplastic synthetic resin in a molten state and thereby form a filament assembly of a plurality of filaments; a pair of chutes arranged across longitudinal faces of the filament assembly to have inclined surfaces that are sloped toward the filament assembly and opposed to each other across a distance that is less than a short side length of the array of the extrusion holes; water supply ports arranged to supply cooling water to the inclined surfaces; and a pair of haul-off machines configured to have endless belts arranged to be in contact with the longitudinal faces of the filament assembly and haul off the filament assembly and opposed to each other across a less distance than the distance between the pair of chutes.
B29C 43/34 - Feeding the material to the mould or the compression means
D04H 3/16 - Non woven fabrics formed wholly or mainly of yarns or like filamentary material of substantial length characterised by the method of strengthening or consolidating with bonds between thermoplastic yarns or filaments produced by welding with bonds between thermoplastic filaments produced in association with filament formation, e.g. immediately following extrusion
D01D 10/00 - Physical treatment of man-made filaments or the like during manufacture, i.e. during a continuous production process before the filaments have been collected
B29C 47/00 - Extrusion moulding, i.e. expressing the moulding material through a die or nozzle which imparts the desired form; Apparatus therefor (extrusion blow-moulding B29C 49/04)
B29C 47/88 - Heating or cooling the stream of extruded material
D04H 3/03 - Non woven fabrics formed wholly or mainly of yarns or like filamentary material of substantial length characterised by the method of forming fleeces or layers, e.g. reorientation of yarns or filaments at random
D04H 3/07 - Non woven fabrics formed wholly or mainly of yarns or like filamentary material of substantial length characterised by the method of forming fleeces or layers, e.g. reorientation of yarns or filaments otherwise than in a plane, e.g. in a tubular way
This 3D mesh structure is produced from a polyethylene having a swelling ratio dependent on shear rate, the swelling ratio with respect to a shear rate of 24.3 sec-1 being 0.93-1.16 and the swelling ratio with respect to a shear rate of 608.0 sec-1 being 1.15-1.34, having an MFR of 3-35 g/10 min, and a density of 0.82-0.95 g/cm3. The 3D mesh structure has a 3D striated sparse/dense structure perpendicular to the direction of extrusion and having a spring structure such that filaments are irregularly contacting/joined. Moreover, the swelling ratio with respect to the shear rate is represented by D2/D1 when a thermoplastic resin melted from a capillary having a tube inner diameter (D1) of Φ1.0 mm and a length of 10 mm is extruded, the extruded filament is cooled, and the diameter of the cross sectional plane of the filament is D2. A mattress or the like using the 3D mesh structure can smoothly bend along the shape of a nursing care bed or the like.
D04H 3/16 - Non woven fabrics formed wholly or mainly of yarns or like filamentary material of substantial length characterised by the method of strengthening or consolidating with bonds between thermoplastic yarns or filaments produced by welding with bonds between thermoplastic filaments produced in association with filament formation, e.g. immediately following extrusion
A47C 27/12 - Spring, stuffed or fluid mattresses specially adapted for chairs, beds or sofas with fibrous inlays, e.g. made of wool, of cotton
This 3D mesh structure is produced from a polyester having a swelling ratio dependent on the shear rate, the swelling ratio with respect to a shear rate of 60.8 sec-1 being 1.10-1.38 and with respect to a shear rate of 608 sec-1 being 1.17-1.43, having an MFR of 3-35 g/10 min, and having a density of 1.01-1.60 g/cm3. The 3D mesh structure has a 3D striated sparse/dense structure perpendicular to the direction of extrusion and having a spring structure such that filaments are irregularly touching/entangled. Moreover, the swelling ratio with respect to the shear rate is represented as D2/D1 when a thermoplastic resin melted from a capillary having a tube inner diameter (D1) of ϕ1.0 mm and a length of 10 mm is extruded, the extruded filament is cooled, and the diameter of the cross sectional plane of the filament is D2. A mattress or the like using this 3D mesh structure can smoothly bend along the shape of a nursing care bed or the like.
D04H 3/16 - Non woven fabrics formed wholly or mainly of yarns or like filamentary material of substantial length characterised by the method of strengthening or consolidating with bonds between thermoplastic yarns or filaments produced by welding with bonds between thermoplastic filaments produced in association with filament formation, e.g. immediately following extrusion
A47C 27/12 - Spring, stuffed or fluid mattresses specially adapted for chairs, beds or sofas with fibrous inlays, e.g. made of wool, of cotton
A method for forming cushions including the following four steps: (1) a compression step in which the structure (2) is compressed in a mold (3); (2) a thermal softening step in which the structure (2) is thermally softened by means of a heating medium; (3) a curing step in which the structure (2) directly undergoes forced cooling in a cooling medium, and is then cured; and (4) a mold release step in which the structure (2) is released from the mold (3).
B29C 70/34 - Shaping by lay-up, i.e. applying fibres, tape or broadsheet on a mould, former or coreShaping by spray-up, i.e. spraying of fibres on a mould, former or core and shaping or impregnating by compression
26.
SELF-RESONATING SOUND EMITTING SPEAKER AND METHOD FOR INSTALLING SELF-RESONATING SOUND EMITTING SPEAKER
Provided is a self-resonating sound emitting speaker which has good water-proof properties and is easy to install. The self-resonating sound emitting speaker (1) includes an actuator-type speaker unit (2) and polymeric foam (3) covering the entire outer surface of the speaker unit (2), said self-resonating sound emitting speaker (1) emitting vibration from the speaker unit (2) outside as a planar wave. Preferably, the polymeric foam (3) has an expansion ratio 10-30 and a closed-cell structure. Further, the thickness range of the polymeric foam (3) is preferably no less than 2 mm and more preferably no less than 3 mm.
H04R 1/28 - Transducer mountings or enclosures designed for specific frequency responseTransducer enclosures modified by provision of mechanical or acoustic impedances, e.g. resonator, damping means
Provided is an apparatus for producing a three-dimensional net structure enabling resilience, dimensional accuracy, and other attributes to be adjusted in a simpler and more cost-effective manner. An apparatus (1) for producing a three-dimensional net structure, wherein the apparatus is characterized in having: a spinneret (3) having an extrusion hole (31) through which a molten thermoplastic synthetic resin is discharged downward as a filament grouping (21) comprising a plurality of filaments (20); a pair of chutes (42a, 42b) having inclined surfaces (44a, 44b) arranged on either side of lengthwise surfaces (22a, 22b) of the filament grouping (21), and inclined towards the filament grouping (21), the chutes being arranged opposite each other across a space (S1) smaller than the widthwise length of the extrusion hole (31); a water supply port (5) for supplying coolant water to the inclined surfaces (44a, 44b); and a pair of pulling devices (6) that have endless belts (61a, 61b) for pulling the filament grouping (21) while in contact with the lengthwise surfaces (22a, 22b) of the filament grouping (21), and that are arranged opposite each other across a space smaller than the space between the pair of chutes (42a, 42b).
D04H 3/16 - Non woven fabrics formed wholly or mainly of yarns or like filamentary material of substantial length characterised by the method of strengthening or consolidating with bonds between thermoplastic yarns or filaments produced by welding with bonds between thermoplastic filaments produced in association with filament formation, e.g. immediately following extrusion
A method for forming seat cushions reduces the mold release time. A structure (2) is formed when three or four surfaces of four surfaces, excluding the two end surfaces in the extrusion direction thereof, cure. Normally, the density of the structure (2) is higher than other regions, and the structure (2) is provided with a total of six surfaces: a top surface, a bottom surface, a left surface and a right surface (see fig. 9 and 10), and two end surfaces that have been cut (see fig. 11). The structure (2) is formed according to a formation method comprising the following steps. (1) A compression step in which the structure (2) is compressed in a mold (3). (2) A thermal softening step in which the structure (2) is thermally softened by means of a heating medium. (3) A curing step in which the structure (2) directly undergoes forced cooling in a cooling medium, and is then cured. (4) A mold release step in which the structure (2) is released from the mold (3).
B68G 11/06 - Finished upholstery not provided for in other classes mainly composed of resilient materials, e.g. of foam rubber with embedded springs, e.g. bonded
A47C 27/12 - Spring, stuffed or fluid mattresses specially adapted for chairs, beds or sofas with fibrous inlays, e.g. made of wool, of cotton
Furniture; Sofas [ Floor Coverings; Carpet tiles for covering floors; Carpets, rugs, mats and matting, linoleum for covering existing floors; Coverings for existing floors; Decorative slip-resistant floor covering in sheet form; Resilient hard surface covering for floors, walls and other surfaces ]
mattresses for medical purposes; cushions for medical purposes; pillows for medical purposes; bed fittings for medical purposes; bedding for medical purposes; beds for medical purposes. cushions; floor cushions; pillows; mattresses; bed fittings; bedding; beds. bedding covers; mattress covers; pillow cases; covers for floor cushions; quilts; bed blankets; bed clothes.
