WO2021177226A1 - Matériau de coussin - Google Patents

Matériau de coussin Download PDF

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Publication number
WO2021177226A1
WO2021177226A1 PCT/JP2021/007700 JP2021007700W WO2021177226A1 WO 2021177226 A1 WO2021177226 A1 WO 2021177226A1 JP 2021007700 W JP2021007700 W JP 2021007700W WO 2021177226 A1 WO2021177226 A1 WO 2021177226A1
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WO
WIPO (PCT)
Prior art keywords
cushion body
dimensional network
network structure
woven fabric
cushion
Prior art date
Application number
PCT/JP2021/007700
Other languages
English (en)
Japanese (ja)
Inventor
高岡佳久
小林慎吾
Original Assignee
株式会社シーエンジ
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by 株式会社シーエンジ filed Critical 株式会社シーエンジ
Priority to JP2021532330A priority Critical patent/JPWO2021177226A1/ja
Priority to CN202180018377.8A priority patent/CN115209766A/zh
Publication of WO2021177226A1 publication Critical patent/WO2021177226A1/fr

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Classifications

    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B60—VEHICLES IN GENERAL
    • B60N—SEATS SPECIALLY ADAPTED FOR VEHICLES; VEHICLE PASSENGER ACCOMMODATION NOT OTHERWISE PROVIDED FOR
    • B60N2/00—Seats specially adapted for vehicles; Arrangement or mounting of seats in vehicles
    • B60N2/62—Thigh-rests
    • A—HUMAN NECESSITIES
    • A47—FURNITURE; DOMESTIC ARTICLES OR APPLIANCES; COFFEE MILLS; SPICE MILLS; SUCTION CLEANERS IN GENERAL
    • A47C—CHAIRS; SOFAS; BEDS
    • A47C27/00—Spring, stuffed or fluid mattresses or cushions specially adapted for chairs, beds or sofas
    • A47C27/12—Spring, stuffed or fluid mattresses or cushions specially adapted for chairs, beds or sofas with fibrous inlays, e.g. made of wool, of cotton
    • A—HUMAN NECESSITIES
    • A47—FURNITURE; DOMESTIC ARTICLES OR APPLIANCES; COFFEE MILLS; SPICE MILLS; SUCTION CLEANERS IN GENERAL
    • A47C—CHAIRS; SOFAS; BEDS
    • A47C7/00—Parts, details, or accessories of chairs or stools
    • A47C7/02—Seat parts
    • A47C7/24—Upholstered seats
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B32—LAYERED PRODUCTS
    • B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
    • B32B5/00—Layered products characterised by the non- homogeneity or physical structure, i.e. comprising a fibrous, filamentary, particulate or foam layer; Layered products characterised by having a layer differing constitutionally or physically in different parts
    • B32B5/22—Layered products characterised by the non- homogeneity or physical structure, i.e. comprising a fibrous, filamentary, particulate or foam layer; Layered products characterised by having a layer differing constitutionally or physically in different parts characterised by the presence of two or more layers which are next to each other and are fibrous, filamentary, formed of particles or foamed
    • B32B5/24—Layered products characterised by the non- homogeneity or physical structure, i.e. comprising a fibrous, filamentary, particulate or foam layer; Layered products characterised by having a layer differing constitutionally or physically in different parts characterised by the presence of two or more layers which are next to each other and are fibrous, filamentary, formed of particles or foamed one layer being a fibrous or filamentary layer
    • B32B5/26—Layered products characterised by the non- homogeneity or physical structure, i.e. comprising a fibrous, filamentary, particulate or foam layer; Layered products characterised by having a layer differing constitutionally or physically in different parts characterised by the presence of two or more layers which are next to each other and are fibrous, filamentary, formed of particles or foamed one layer being a fibrous or filamentary layer another layer next to it also being fibrous or filamentary
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B61—RAILWAYS
    • B61D—BODY DETAILS OR KINDS OF RAILWAY VEHICLES
    • B61D33/00—Seats
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B61—RAILWAYS
    • B61D—BODY DETAILS OR KINDS OF RAILWAY VEHICLES
    • B61D33/00—Seats
    • B61D33/0007—Details; Accessories
    • B61D33/0035—Cushions or the like; Covers
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B64—AIRCRAFT; AVIATION; COSMONAUTICS
    • B64D—EQUIPMENT FOR FITTING IN OR TO AIRCRAFT; FLIGHT SUITS; PARACHUTES; ARRANGEMENT OR MOUNTING OF POWER PLANTS OR PROPULSION TRANSMISSIONS IN AIRCRAFT
    • B64D11/00—Passenger or crew accommodation; Flight-deck installations not otherwise provided for
    • B64D11/06—Arrangements of seats, or adaptations or details specially adapted for aircraft seats
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B68—SADDLERY; UPHOLSTERY
    • B68G—METHODS, EQUIPMENT, OR MACHINES FOR USE IN UPHOLSTERING; UPHOLSTERY NOT OTHERWISE PROVIDED FOR
    • B68G5/00—Resilient upholstery pads
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B60—VEHICLES IN GENERAL
    • B60N—SEATS SPECIALLY ADAPTED FOR VEHICLES; VEHICLE PASSENGER ACCOMMODATION NOT OTHERWISE PROVIDED FOR
    • B60N2/00—Seats specially adapted for vehicles; Arrangement or mounting of seats in vehicles
    • B60N2/64—Back-rests or cushions
    • B60N2/66—Lumbar supports

Definitions

  • the present invention relates to a cushioning material used as a seat for a vehicle, a railroad, an aircraft, etc., a mattress, or the like.
  • urethane cushioning material has a problem that it is inferior in water permeability and easily stuffy, although it has excellent durability.
  • Patent Document 1 is a seat composed of a back portion and a seat portion formed of a side material, a cushion layer, and a deep-drawn shape portion on the back surface, and the cushion layer winds and winds continuous lines having a fineness of 100,000 denier or less.
  • most of the contact portion in contact is composed of net-like bodies from an apparent density of 0.01 g / cm 3 of a thermoplastic elastomeric resin forming the three-dimensional structure fused 0.2 g / cm 3,
  • a seat characterized in that the resin molded body and the net-like body are integrally joined is disclosed.
  • Patent Document 2 discloses a removable pad and a vehicle seat having a recess having the same shape as the pad.
  • the removable and replaceable pad has a fiber structure coated with a fiber sheet, and has a longitudinal / lateral ratio (T / W ratio) of 1.5 or more of the fibers constituting the fiber structure. It is disclosed that such pads are detachably installed in urethane vehicle seats with recesses.
  • Patent Document 3 is composed of (ii) a three-dimensional network structure in which the seat portion is (i) a three-dimensional network structure in which fibers formed of a thermoplastic elastic resin form a loop and most of the contact portions are joined to each other, and (ii) a thermoplastic resin.
  • a vehicle seat that includes a cushioning layer having a laminated structure with a non-woven fabric to which fibers are bonded, (ii) a non-woven fabric on the seating surface side, (i) cutting of two surfaces of a three-dimensional network structure facing at least in the thickness direction. It discloses a vehicle seat characterized by having a structure in which the ends are compression-bonded.
  • the non-woven fabric is manufactured by mixing and opening short fibers made of a heat-bonding fiber and a thermoplastic inelastic resin to form a three-dimensional structure, and joining and integrating most of the contact portions with a heat-bonding component. Has been done.
  • Patent Document 4 comprises a thermoplastic elastomer having a melting point of 40 ° C. or more lower than the melting point of the polyester polymer constituting the short fibers in a matrix fiber made of an aggregate of inelastic polyester-based crimped short fibers, and an inelastic polyester.
  • the former is a web in which at least elastic composite fibers exposed on the fiber surface are dispersed and mixed as an adhesive component, and the total number of fibers oriented in the length direction is A, and the total number of fibers oriented in the lateral direction is B. Then, the webs satisfying the condition of A> 3B / 2 are sequentially folded in a forested state along the length direction, and at that time, (a) the elastic composite fibers are crossed with each other in the web.
  • a flexible heat-fixing point formed by heat-sealing and (b) a flexible heat-fixing point formed by heat-sealing in a state where the elastic composite fiber and the non-elastic polyester-based short fiber are crossed. Discloses vehicle seats with interspersed cushioning padding.
  • the seat of Patent Document 1 is composed only of a three-dimensional network structure, there is a problem that the tactile sensation of unevenness is felt. In addition, the settling is large and the durability is insufficient. Further, the seat of Patent Document 2 is said to have insufficient breathability and a small amount of urethane reduction because the area of the front end of the seat located under the thigh is made of urethane, especially when the user sits down. There's a problem.
  • the seat of Patent Document 3 is a laminate of a non-woven fabric and a net-like structure, and the non-woven fabric used as an upper layer is three-dimensionally structured by mixing and defibrating short fibers made of a heat-adhesive fiber and a thermoplastic resin.
  • the anti-sag property and durability are insufficient. Further, since the non-woven fabric in the upper layer and the cut end of the network structure in the lower layer are compression-bonded, there is a problem that the product shape is limited. Since the seat of Patent Document 4 is composed only of a fiber structure made of fibers oriented in the thickness direction, it has insufficient cushioning properties and supporting power such as the buttocks. In addition, the shape retention of the seat front region where a load is particularly applied is low, and the durability is insufficient.
  • an object of the present invention is to provide a cushioning material that improves cushioning properties and sitting comfort, is hard to settle, and has high durability.
  • the present invention includes a first cushion body and a second cushion body that is arranged above the first cushion body and covers at least the upper surface of the first cushion body, and the first cushion body is made of a thermoplastic resin.
  • the second cushion body is characterized by including a three-dimensional network structure in which loops are formed by irregularly partially welding the continuous lines of the second cushion body, and the second cushion body is composed of a vertical non-woven fabric in which fibers are oriented in the thickness direction. It is a cushioning material.
  • the total number of fibers arranged vertically and horizontally is (Y)
  • X is larger than Y.
  • the longitudinal / lateral direction ratio (X / Y ratio) of the fibers constituting the vertical nonwoven fabric 3 is preferably 1.5 or more, more preferably 2.0 to 8.0.
  • the cushion material is used for a vehicle seat
  • the vertical non-woven fabric has an accordion type folding structure, and a high-density portion having a higher bulk density than the inside is provided in the front region of the vehicle seat.
  • the vertical non-woven fabric preferably has a 25% smaller compressive hardness than the three-dimensional network structure.
  • the cushion material is used for a vehicle seat, and the first cushion body is integrated by fitting into a groove provided on the lower surface of the second cushion body.
  • the region in front of the front surface of the first cushion body is preferably a high-density portion having a higher bulk density than the other regions.
  • the cushion material is used for a vehicle seat, and it is preferable to provide a spring receiving material below the first cushion body and the second cushion body.
  • the spring receiving material has a bulk density of 0.5 to 0.01 g / cm 3 and a thickness of 0.5 to 25 mm in which a loop is formed by irregularly partially welding continuous lines of a thermoplastic resin.
  • the bulk density of the three-dimensional network structure composed of the three-dimensional network structure and constituting the spring receiving material is preferably higher than the bulk density of the three-dimensional network structure included in the first cushion body.
  • the cushion material is used for a vehicle seat, and the three-dimensional network structure included in the first cushion body has a sparse and dense structure in which sparse portions and dense portions extending in the width direction of the vehicle seat are repeatedly provided in the front-rear direction. However, it is preferable to provide the dense portion in the middle portion in the front-rear direction of the vehicle seat.
  • the first cushion body is composed of multiple layers, includes a three-dimensional network structure as an upper layer, and a second vertical non-woven fabric as a layer located below the upper layer, and the second vertical non-woven fabric has the second cushion body. It is preferable that the bulk density is higher than that of the constituent vertical non-woven fabric.
  • the first cushion body is preferably composed of multiple layers, and preferably contains a three-dimensional network structure as an upper layer and a non-woven fabric in which fibers are laterally oriented as a layer located below the upper layer.
  • the first cushion body is preferably composed of a plurality of layers, and preferably contains a three-dimensional network structure as an upper layer and a urethane foam as a layer located below the upper layer.
  • the cushion material is used for a mattress
  • the second cushion body has a sparse and dense structure in which sparse portions and dense portions extending in the width direction are repeatedly provided in the length direction of the mattress, and the dense portion is provided in the middle portion of the mattress. It is preferable to provide a part.
  • the cushion material is used for a mattress
  • the first cushion body includes a surface layer, an upper layer, and a base layer
  • the bulk density of the surface layer is higher than that of the upper layer and the base layer
  • the bulk density of the base layer is higher. Is preferably higher than that of the upper layer.
  • the second cushion body is preferably contained in a cover sheet that covers at least the upper surface of the first cushion body.
  • the vertical non-woven fabric when the user sits on the cushion material, the vertical non-woven fabric is arranged on the buttocks and the thigh side, and a three-dimensional network structure is provided below the vertical non-woven fabric, so that the cushioning material can be used for a long period of time.
  • due to the springiness inherent in the three-dimensional network structure the support force of the buttocks and the like is increased, and fatigue is less likely to occur.
  • the cushion material when used for a vehicle seat, the shape retention and durability can be improved and the sitting comfort can be improved by forming a high-density portion in the front region of the vertical non-woven fabric. Furthermore, the amount of urethane used can be reduced, and the burden on the environment can also be reduced.
  • the vehicle seat 1 (cushion material) of the first embodiment of the present invention will be described with reference to FIGS. 1 to 2.
  • the vehicle seat 1 includes a three-dimensional network structure 2 which is a first cushion body, a vertical non-woven fabric 3 which is a second cushion body laminated and arranged above the first cushion body, and a spring receiving material 4.
  • the vertical nonwoven fabric 3 has a shape in which the thickness becomes thin in the front region.
  • a three-dimensional network structure 2 having the same shape as the groove 32 is fitted into the groove portion 32 formed on the lower surface of the vertical non-woven fabric 3, and a spring is provided so as to abut the lower surface of the three-dimensional network structure 2 and the vertical non-woven fabric 3.
  • the receiving material 4 is arranged, and the entire surface is covered with a cover sheet (not shown) made of cloth, non-woven fabric, or the like.
  • the three-dimensional network structure 2 has a substantially rectangular parallelepiped shape, and the groove portion 32 has an inner shape having substantially the same shape as its outer shape.
  • the front and rear side surfaces, the left and right side surfaces, and the entire upper surface of the three-dimensional network structure 2 are in contact with the vertical non-woven fabric 3 and covered.
  • the lower surfaces of the three-dimensional network structure 2 and the vertical non-woven fabric 3 are flush with each other.
  • the thickness of the vertical nonwoven fabric 3 is preferably 5 to 150 mm, and the thickness of the three-dimensional network structure 2 is preferably 5 to 140 mm.
  • the vertical non-woven fabric 3 contains short fibers and heat-adhesive fibers, and the fibers are vertically oriented in the thickness direction of the vertical non-woven fabric 3.
  • "Fibers are arranged vertically in the thickness direction” means that the total number of fibers arranged vertically parallel to the thickness direction of the non-woven fabric is (X), and is in the thickness direction of the non-woven fabric.
  • the total number of fibers arranged vertically and horizontally is (Y)
  • X is larger than Y.
  • the longitudinal / lateral direction ratio (X / Y ratio) of the fibers constituting the vertical nonwoven fabric 3 is preferably 1.5 or more, more preferably 2.0 to 8.0.
  • the ratio of the total number of fibers in the vertical direction (X) to the total number of fibers in the horizontal direction (Y) is parallel to the thickness direction (0) in the cross section of the vertical non-woven fabric 3 cut in the thickness direction.
  • the number of fibers arranged at ° to 45 °) and the number of fibers arranged perpendicular to the thickness direction (45 to 90 °) can be observed with a microscope and calculated as a ratio thereof.
  • a conventionally known method may be adopted.
  • short fibers and heat-adhesive short fibers are mixed and spun out as a uniform web by a roller card, and then known.
  • An example is a method in which the web is heat-treated while being folded into an accordion shape or in a folded state by using the heat treatment machine of the above to form a fixing point by heat fusion. Since most of the fibers that normally make up the web are arranged in the plane direction of the web, most of the fibers can be arranged in the thickness direction by continuously folding and laminating them in an accordion shape.
  • a strut machine registered trademark, non-woven fabric manufacturing device described in European Patent Application Publication No. 0350627) or an air array machine (for example, manufactured by Failer, V21 / R).
  • -It can be manufactured by folding it in a zigzag shape with K12, V21 / K12) or the like, and then compressing and heat-treating it.
  • the fiber length of the short fibers used in the vertical nonwoven fabric 3 is preferably in the range of 30 to 100 mm.
  • the vertical nonwoven fabric 3 may be a fiber structure obtained by repeating a step of depositing short fibers in a strip shape in addition to an accordion structure.
  • the vertical non-woven fabric 3 of the present embodiment is a structure having a structure in which the non-woven fabric web is folded in an accordion manner, and the folding direction is the front-rear direction of the vehicle seat 1.
  • the short fibers constituting the vertical non-woven fabric natural fibers such as cotton and wool, inorganic fibers such as carbon fibers, synthetic fibers such as polyolefin and polyester can be used.
  • the heat-adhesive fiber a synthetic fiber having a melting point lower than that of the short fiber by 40 degrees or more is preferable.
  • the bulk density of the vertical nonwoven fabric 3 is preferably 0.005 to 0.50 g / cm 3.
  • the vertical nonwoven fabric 3 has a sparse and dense structure having a rough portion and a dense portion in the front-rear direction. Specifically, a high-density portion 31 having a higher bulk density than other places is provided in the region on the front side of the seat.
  • the bulk density of the high-density portion 31 is preferably 0.01 to 0.50 g / cm 3.
  • the region in front of the front side surface of the three-dimensional network structure 2 is the high-density portion 31, and the high-density portion 31 is not provided directly above the three-dimensional network structure 2.
  • the high-density portion 31 extends in the width direction of the vehicle seat 1.
  • the density of the vertical nonwoven fabric 3 can be changed, for example, by changing the folding density of the fiber sheet during manufacturing.
  • the shape retention of the front region which is particularly liable to be loaded and the shape is liable to collapse, can be improved, and the cushioning property can also be improved.
  • the high-density portion 31 is provided not only on the front surface but also on the left and right side surface portions and the rear side surface portion of the vertical nonwoven fabric 3 from the viewpoint of shape retention. Further, it may have a coarse-dense structure in which dense portions having a high bulk density and sparse portions having a low bulk density are repeated in any one of the thickness direction, the front-rear direction, the left-right direction, or a combination thereof.
  • the vertical non-woven fabric 3 Since the entire seating surface of the vehicle seat 1 is made of the vertical non-woven fabric 3, the air permeability is improved and there is no concern that the user will get stuffy even if he / she sits for a long time. Further, the vertical non-woven fabric 3 is more springy, comfortable to sit on, and lighter than the flat non-woven fabric in which fibers are arranged in the horizontal direction. In addition, the vertical non-woven fabric 3 is particularly resistant to "sagging" due to a load from above, and is durable even if it is located in the buttocks and the back of the thighs of the feet where the load is most applied when the user sits down. Can maintain sex.
  • the vertical non-woven fabric 3 since the fibers oriented in the vertical direction are perpendicular to the pressure receiving surface, the vertical non-woven fabric 3 is deformed at a point when the user is seated and a load is applied, and is deformed along the user's body. Therefore, it has excellent body pressure dispersibility and does not get tired even if you sit for a long time.
  • the three-dimensional network structure 2 is a structure in which loops are formed by irregularly partially welding continuous lines made of a thermoplastic resin having a line diameter (diameter) of 0.3 mm to 1.5 mm.
  • Bulk density is an important factor that determines soft high resilience and is designed as needed, but is preferably 0.025 g / cm 3 to 0.2 g / cm 3 , more preferably. Is 0.04 g / cm 3 to 0.09 g / cm 3 . If the bulk density is less than 0.025 g / cm 3 , the shape cannot be maintained, and if it exceeds 0.20 g / cm 3 , it becomes unsuitable as a vehicle seat.
  • thermoplastic resin used as the raw material of the three-dimensional network structure 2 examples include polyethylene-based thermoplastic resin, polypropylene-based thermoplastic resin, polyester-based thermoplastic elastomer, polypropylene-based thermoplastic elastomer, polyethylene-based thermoplastic resin, and polyethylene-based thermoplastic resin. It preferably contains a mixture of elastomers, PVC, polyurethane elastomers, nylon-based elastomers, polystyrene elastomers and the like.
  • the three-dimensional network structure 2 has a coarse-dense structure in which dense portions 21 having a relatively high bulk density ⁇ 1 and sparse portions 22 having a low bulk density ⁇ 2 are alternately repeated in the front-rear direction of the sheet.
  • a dense portion 21 extending in the width direction is formed in the middle portion in the front-rear direction of the seat, and a sparse portion 22 is formed in front of and behind the dense portion 21.
  • the bulk density of the dense portion 21 is preferably 0.03 to 0.10 g / cm 3
  • the bulk density of the sparse portion is preferably 0.01 to 0.08 g / cm 3.
  • This coarse and dense structure can be formed by setting the extrusion direction of the three-dimensional network structure 2 at the time of manufacturing to the front-rear direction of the sheet and changing the speed of the rollers or caterpillars.
  • the three-dimensional network structure 2 may further have a sparse and dense structure in the thickness direction and the left-right direction. Further, for example, by forming four surfaces, surface layers having a higher bulk density than the inside may be provided on the upper surface, the lower surface, and the left and right side surfaces.
  • the spring receiving member 4 plays a role of preventing the rod-shaped spring in the seat frame arranged below the vehicle seat 1 from biting into the vehicle seat 1.
  • the spring receiving material 4 forms a loop by irregularly partially welding continuous fibers of a thermoplastic resin having a wire diameter (diameter) of 0.3 mm to 1.5 mm. Although it is a three-dimensional network structure, it has a bulk density ⁇ 1 and a bulk density ⁇ 3 higher than the bulk density ⁇ 1 and ⁇ 2 of the three-dimensional network structure 2 as the first cushioning material, and is a relatively hard cushion.
  • the spring receiving material 4 preferably has a bulk density of 0.5 to 0.01 g / cm 3 and a thickness of 0.5 to 25 mm. The hardness of the spring receiving material 4 can be adjusted by changing the fineness, bulk density, raw material, and structure.
  • thermoplastic resin used as the raw material of the spring receiving material 4 examples include polyethylene-based thermoplastic resin, polypropylene-based thermoplastic resin, polyester-based thermoplastic elastomer, polypropylene-based thermoplastic elastomer, polyethylene-based thermoplastic resin, and polyethylene-based thermoplastic elastomer. It preferably contains a mixture, PVC, polyurethane elastomer, nylon-based elastomer, polystyrene elastomer and the like.
  • the spring receiving material 4 preferably has a maximum load (maximum proof stress) of 9.8 to 294.2 N, preferably 19.6 to 294.2 N in the extrusion direction at the time of manufacture. If the maximum load in the tensile test is less than 19.6 N, the fibers may be loosened during compression. The maximum load in the extrusion direction is affected by fineness, bulk density, raw material, and structure.
  • the above tensile test is performed as follows. A test piece cut from a product of a three-dimensional network structure to a size of 10 cm (length: extrusion direction) x 10 cm (width) is used as a test piece, the upper end of the test piece is fixed, and the position is 4 cm above the lower end of the central part in the width direction of the test piece. The maximum load is measured by hooking an R20 with a diameter of 5 mm and pulling it downward.
  • the detailed manufacturing method of the spring receiving material 4 used in the present invention is basically the same as that of the three-dimensional network structure 2.
  • the left and right width c of the three-dimensional network structure 2 is preferably 100 to 2000 mm, and the depth b is preferably 200 to 700 mm.
  • the width a of the vertical nonwoven fabric 3 is preferably 300 to 2000 mm, and the depth d is preferably 300 to 800 mm.
  • spring receiving material 4 in addition to the above-mentioned three-dimensional network structure, felt, non-woven fabric, or the like can also be adopted.
  • the vehicle seat 1 is formed so that the groove portion 32 is formed on the back surface of the vertical non-woven fabric 3, the three-dimensional network structure 2 is fitted in the groove portion 32, and the spring receiving material 4 is laminated.
  • the three-dimensional network structure 2, the vertical non-woven fabric 3, and the spring receiving material 4 may be fitted without being bonded and covered with a cover sheet while being laminated, but may be fused by heat, bonded with a hook-and-loop fastener, hot melt, or the like. They can also be bonded to each other with an agent or the like.
  • the three-dimensional network structure 2 and the vertical non-woven fabric 3 are preferably those having a critical oxygen index (LOI value) of 28 or more.
  • the cover sheet is preferably made of flame-retardant fiber, and when used for a train seat, the cover sheet preferably has a critical oxygen index (LOI value) of 28 or more.
  • the flame-retardant fiber known materials such as carbon fiber and flame-resistant fire fiber are adopted.
  • the vertical non-woven fabric 3 is arranged on the surface side (human body side) to improve the resistance, durability, and tactile sensation, and the three-dimensional network structure 2 is arranged on the lower surface thereof. , Cushioning and sitting comfort are improved.
  • the 25% compressive hardness of the dense portion 21 and the sparse portion 22 of the three-dimensional network structure 2 is higher than that of the vertical non-woven fabric 3.
  • the 25% compressive hardness is measured according to JIS K6400-2. Specifically, the 25% compressive hardness of the dense portion 21 of the three-dimensional network structure is 80 to 180 N, the 25% compressive hardness of the sparse portion 22 is 40 to 130 N, and the vertical non-woven fabric 3 (excluding the high density portion 31). ),
  • the 25% compressive hardness is preferably 25 to 100 N.
  • the vertical non-woven fabric 3 and the three-dimensional network structure 2 are made of the thermoplastic elastic resin, most of the vibration given from the outside is absorbed and attenuated by the vibration absorbing function of the thermoplastic elastic resin. It works as a vibration blocking layer.
  • the vehicle seat 101 (cushion material) of the second embodiment of the present invention will be described with reference to FIGS. 3 (a) to 3 (c). Since the vehicle seat 101 basically has the same configuration as the vehicle seat 1, the common description will refer to the illustration and description of the first embodiment and explain the differences. As for the code attached to each element, the corresponding number of the first embodiment is in the 100s.
  • the first cushion body is composed of a single layer of a three-dimensional network structure, but in the second embodiment, the first cushion body is composed of two layers, an upper layer 121 and a lower layer 122. ..
  • the upper layer 121 is made of a three-dimensional network structure, and as the lower layer 122, a non-woven fabric in which fibers are oriented in the horizontal direction (planar direction), a vertical non-woven fabric, urethane foam, and other cushioning materials can be used. Further, by providing a lower layer or an intermediate layer, a plurality of layers such as three layers and four layers can be formed.
  • the upper layer 121 constituting the first cushion body 102 is composed of a three-dimensional network structure
  • the lower layer 122 is a non-woven fabric in which fibers are oriented in the lateral direction (planar direction). This makes it possible to increase the durability.
  • the upper layer 121 constituting the first cushion body 102 is composed of a three-dimensional network structure
  • the lower layer 122 is composed of a vertical non-woven fabric.
  • the vertical non-woven fabric used for the lower layer 122 is a non-woven fabric having a higher bulk density and being harder than the vertical non-woven fabric 103 used as the second cushion body.
  • the vertical non-woven fabric 103 preferably has a 25% compression hardness of 25 to 100 N and a density of 25 to 80 g / cm 3
  • the lower layer 122 preferably has a 25% compression hardness of 40 to 140 N and a density of 40 to 100 g / cm 3 .
  • the 25% compression hardness is measured by JIS K6400-2.
  • the 25% compressive hardness can be adjusted by changing the material, bulk density, and fineness of the non-woven fabric.
  • the upper layer 121 is a three-dimensional network structure
  • the lower layer 122 is a urethane foam. High durability can be obtained by using urethane foam.
  • the vehicle seat 201 of the third embodiment of the present invention will be described with reference to FIG. Since the vehicle seat 201 basically has the same configuration as the vehicle seat 1, the common description will refer to the illustration and description of the first embodiment and explain the differences. As for the code attached to each element, the corresponding number of the first embodiment is in the 200s.
  • the three-dimensional network structure 2 which is the first cushion body is fitted into the groove 32 on the back surface of the vertical non-woven fabric 3 which is the second cushion body.
  • a vertical non-woven fabric 203 having a substantially flat lower surface is laminated on the three-dimensional network structure 202, and is covered with a cover sheet (not shown) together with the spring receiving material 204.
  • a high-density portion 231 is formed in the front region of the vertical nonwoven fabric 203 where the thickness is reduced, and the three-dimensional network structure 202 is formed with a coarse-dense structure having a sparse portion 222 and a dense portion 221 in the front-rear direction.
  • a dense portion 221 is formed in the intermediate portion.
  • the mattress 301 as the cushioning material of the fourth embodiment of the present invention will be described with reference to FIGS. 5 to 7.
  • the cushion material is used as a vehicle seat, but in the present embodiment, it is used as a mattress. Since the mattress 301 basically has the same configuration as the vehicle seat 1, the common description will refer to the illustration and description of the first embodiment and explain the differences.
  • the code attached to each element the corresponding number of the first embodiment is in the 300s.
  • the mattress 301 is, for example, a mattress used for a bed installed at the rear of the driver's cab of a truck 8. As is known, the mattress 301 allows a driver or the like to take a nap in the car or a driver's assistant to sit behind between the seats 81.
  • FIG. 5 is a cross-sectional view of the mattress 301 in the length direction.
  • the mattress 301 includes a first cushion body made of a three-dimensional network structure 302 and a second cushion body made of a vertical non-woven fabric 303 covering the upper surface of the three-dimensional network structure 302.
  • the vertical non-woven fabric 303 as the second cushion body has a bulk density of 0.005 to 0.50 g / cm 3 as a whole, and sparse portions and dense portions extending in the width direction in the length direction are repeatedly provided in the front-rear direction. It has a coarse-dense structure, the central portion is a high-density portion 331, and the medium-density portions 333 are provided on both sides thereof.
  • the three-dimensional network structure 302 as the first cushion body also has a coarse and dense structure in which sparse portions and dense portions extending in the width direction in the length direction are repeatedly provided in the front-rear direction.
  • the central portion is a dense portion 321 and both sides thereof are sparse portions 322.
  • the bulk density of the first cushion body as a whole is 0.03 to 0.80 g / cm 3 .
  • the dense portion 321 is present so as to abut on the lower surface of the high density portion 331.
  • the driver's assistant may sit in the center of the mattress 301, but since the high-density portion 331 is provided in the center in the length direction, the durability is improved. In addition, there is an advantage that the driver is comfortable to sleep when sleeping.
  • the laminated body of the three-dimensional network structure 302 and the vertical non-woven fabric 303 is entirely covered with a cover sheet (not shown) made of cloth, non-woven fabric, or the like, or its upper surface and side surfaces.
  • the laminated body of the three-dimensional network structure 302 and the vertical non-woven fabric 303 may be covered with a cover sheet while being laminated without being bonded to each other, or may be fused by heat, a hook-and-loop fastener, an adhesive such as hot melt, or the like. They may be joined to each other.
  • FIG. 6 is a cross-sectional view in the length direction showing a modified example of the mattress 301.
  • the mattress 301 includes a first cushion body made of a three-dimensional network structure 302 and a second cushion body made of a vertical non-woven fabric 303, and the three-dimensional network structure 302 has a surface layer 323, an upper layer 324, and a base from the surface. It comprises layer 325.
  • the surface layer 323 is a thin high-density layer of about 2 mm and has a bulk density of 0.045 to 0.80 g / cm 3 .
  • the base layer 325 has a lower bulk density than the surface layer 323, and the bulk density is 0.040 to 0.70 g / cm 3 .
  • the upper layer 324 has a lower bulk density than the surface layer 323 and the base layer 325, and has a bulk density of 0.040 to 0.70 g / cm 3 .
  • the mattress 401 as the cushioning material of the fifth embodiment of the present invention will be described with reference to FIG. Since the mattress 401 basically has the same configuration as the mattress 301, the common description will refer to the illustration and description of the fourth embodiment and explain the differences.
  • the code attached to each element the corresponding number of the fourth embodiment is in the 400s.
  • the laminate of the three-dimensional network structure 302 and the vertical non-woven fabric 303 is covered with the cover sheet, whereas in the present embodiment, the cover sheet 405 covering the three-dimensional network structure 402 is used.
  • Vertical non-woven fabric 403 is included.
  • the vertical non-woven fabric 403 is thinner than the three-dimensional network structure 402. It is preferable to put the vertical non-woven fabric 403 in the cover sheet 405 and fix it by quilting.
  • the vertical non-woven fabric 403 and the three-dimensional network structure 402 have a uniform bulk density as a whole, but as in the fourth embodiment, the vertical non-woven fabric 403 and the three-dimensional network structure 402 may have a high density portion in the central portion in the length direction. It is also preferable that the three-dimensional network structure 402 has a surface layer, an upper layer, and a base layer having different bulk densities in the thickness direction. According to this embodiment, since it is only necessary to attach the cover sheet to the three-dimensional network structure 402, there are merits such as easy manufacturing. Further, also in the vehicle seats of the first to third embodiments, it is preferable to fix the vertical non-woven fabric in the cover sheet as in the present embodiment.
  • first cushion body 102 ... 1st cushion body 21,221,321 ... Dense part 22,222,322 ... Sparse part 3,103,203,303,403 ... Vertical non-woven fabric (second cushion body) 31, 231, 331 ... High density part 333 ... Medium density part 323 ... Surface layer 324 ... Upper layer 325 ... Base layer 32 ... Grooves 4, 104, 204 ... Spring receiver Material 121 ... Upper layer of the first cushion body 122 ... Lower layer of the first cushion body 8 ... Track

Landscapes

  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Aviation & Aerospace Engineering (AREA)
  • Transportation (AREA)
  • Mattresses And Other Support Structures For Chairs And Beds (AREA)

Abstract

La présente invention a pour objet de fournir un siège de véhicule qui n'est pas susceptible de subir une déformation permanente et qui présente une grande durabilité.　Le matériau de coussin (1) selon l'invention comprend : un premier corps de coussin (2) ; et un deuxième corps de coussin (3) qui est disposé au-dessus du premier corps de coussin (2) et recouvre au moins la surface supérieure du premier corps de coussin (2), le matériau de coussin (1) étant caractérisé en ce que le premier corps de coussin (2) comprend une structure tridimensionnelle de type filet dans laquelle des boucles sont formées par soudage partiel de filaments continus d'une résine thermoplastique d'une manière irrégulière, et le deuxième corps de coussin (3) est constitué d'une étoffe non tissée verticale dans lequel des fibres sont orientées dans le sens de l'épaisseur.
PCT/JP2021/007700 2020-03-03 2021-03-01 Matériau de coussin WO2021177226A1 (fr)

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CN202010138893.1 2020-03-03
CN202010138893.1A CN113335160A (zh) 2020-03-03 2020-03-03 车辆用座位

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CN113930900B (zh) * 2021-10-29 2023-01-20 延锋国际座椅系统有限公司 一种热塑性纤维网结构以及汽车内饰件

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JP2002000408A (ja) * 2000-06-20 2002-01-08 Toyobo Co Ltd 乗物用座席
JP2003260278A (ja) * 2002-03-11 2003-09-16 Toyobo Co Ltd 車両用座席
JP2006223707A (ja) * 2005-02-21 2006-08-31 Kanebo Ltd 不織布構造体、シートクッション材及びそれからなる車両用シート
WO2007114229A1 (fr) * 2006-03-31 2007-10-11 Ts Tech Co., Ltd. corps de coussin, siège d'assise et leur processus de fabrication
JP2008221953A (ja) * 2007-03-09 2008-09-25 Asaba Seisakusho:Kk 車両用座席のシートクッション
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JP2018193042A (ja) * 2017-05-22 2018-12-06 帝人株式会社 車両用座席

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JPWO2021177226A1 (fr) 2021-09-10
CN113335160A (zh) 2021-09-03

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