WO2002069765A1 - Coussin de siege - Google Patents

Coussin de siege Download PDF

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Publication number
WO2002069765A1
WO2002069765A1 PCT/JP2001/001698 JP0101698W WO02069765A1 WO 2002069765 A1 WO2002069765 A1 WO 2002069765A1 JP 0101698 W JP0101698 W JP 0101698W WO 02069765 A1 WO02069765 A1 WO 02069765A1
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WO
WIPO (PCT)
Prior art keywords
weight
parts
cushion pad
seat cushion
polyol
Prior art date
Legal status (The legal status 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 status listed.)
Ceased
Application number
PCT/JP2001/001698
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English (en)
Japanese (ja)
Inventor
Atsushi Kazuno
Masanobu Banno
Takanori Sugie
Katsuya Satoh
Kikuo Sekita
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Toyo Tire Corp
Original Assignee
Toyo Tire and Rubber Co Ltd
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 Toyo Tire and Rubber Co Ltd filed Critical Toyo Tire and Rubber Co Ltd
Priority to PCT/JP2001/001698 priority Critical patent/WO2002069765A1/fr
Priority to JP2002520805A priority patent/JP3644640B2/ja
Publication of WO2002069765A1 publication Critical patent/WO2002069765A1/fr
Anticipated expiration legal-status Critical
Ceased legal-status Critical Current

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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
    • B60N2/70—Upholstery springs ; Upholstery

Definitions

  • the present invention relates to a seat cushion pad made of a polyurethane foam.
  • the seat cushion pad of the present invention is suitable for a seat cushion pad for a vehicle, particularly an automobile, which vibrates when used.
  • vibration transmission preventing means such as an engine mount are used.
  • a good feeling when sitting is required because the seat is made of a highly cushioning flexible polyurethane foam.
  • trucks and passenger cars and passenger cars also have various grades.
  • vibration transmission prevention means are also selected and used.
  • Such vibration transmission preventing means cannot completely prevent vibration transmission at all frequencies, and there are frequencies disadvantageous to vibration transmission prevention depending on the type. For this reason, various characteristics are required for the flexible polyurethane foam for the seat cushion, including the characteristic of preventing vibration transmission, depending on the application.
  • vibration around 6 Hz is said to be the frequency that causes car sickness.
  • the vibration transmission rate must be kept low.
  • ⁇ 1 has been developed.
  • conventional seat cushions with low vibration transmission at 6 Hz.
  • the head has a large resonance magnification (resonance peak) appearing at 2 to 4 Hz in the vibration transmissibility characteristics, so that when an occupant is seated on an automobile seat cushion and runs, the body is subject to vibration due to body vibration. The sense of stability was lost, and the sensation of swinging the body up and down (so-called chilling feeling) could not be sufficiently prevented.
  • seat cushion pads for vehicles including automobiles, not only reduce the vibration transmissibility around 6 Hz but also reduce driving sickness and reduce fatigue during driving. It is also necessary to improve safety (improvement of stability when sitting on the seat), and it is considered preferable to show a low vibration transmissibility even in a wider frequency range.
  • the vibration transmissivity characteristic curve (vertical axis: vibration transmissivity, horizontal axis: frequency) is obtained by lowering the resonance magnification at 2 to 4 Hz of the vibration transmissibility characteristic.
  • the vibration transmissibility at a relatively high frequency (for example, 6 Hz) related to the cushioning property increases, and the vibration transmissibility characteristic curve becomes a broad curve as a whole. That is, in the vibration transmissibility characteristic curve, a decrease in the vibration transmissivity and a decrease in the resonance magnification had a trade-off relationship.
  • an object of the present invention is to provide a high attenuation property that can reduce the resonance magnification at 2 to 4 Hz and reduce the vibration transmissibility around 6 Hz to the same level as or less than the conventional one.
  • Another object of the present invention is to provide a seat cushion pad having an excellent fit when seated at the same time.
  • the present invention relates to a sheet cushion pad comprising a polyurethane foam having a skin layer and a core layer formed by injecting a polyurethane foam material into a mold,
  • the seat has a one-layer structure
  • the resonance magnification at 2 to 4 Hz was 4 or less and the rebound resilience of the core layer was 5 0 to 70%
  • the polyurethane foam raw material has a hydroxyl value of 20 to 40 mg KOH / g as a polyol component, 60 to 80 parts by weight of a polyether polyol having an ethylene oxide unit at the end, and 7 an acid value of 1 5 to 30 mg K0H / g of polymer polyol 40 to 20 parts by weight, a silicone foam stabilizer, a foaming agent, and diphenylmethane diisocyanate as a polyisocyanate conjugate It is characterized by being used.
  • the seat cushion pad with the above configuration has a low resonance magnification at 2 to 4 Hz, and the vibration transmissibility at around 6 Hz is equal to or less than the conventional one, has high damping properties, and sits at the same time. Seat cushioning, with a good fit when you do it.
  • the polyurethane foam raw material is a copolymer of ethylene oxide and propylene oxide having a molecular weight of 100 to 500, and the copolymerization ratio of ethylene oxide is 50% by weight. 0/0 or more in a polymer as a foam breaking agent, it is preferred for the polyol component 1 0 0 part by weight 0. 5 are those containing 5 parts by weight.
  • a compound having an ethylene oxide content of less than 50% by weight has a small foam breaking effect, and a resonance magnification while suppressing the resonance frequency from becoming 4 Hz or more even when the molecular weight is out of the above range. The effect of lowering is not obtained. If the added amount of the above-mentioned foaming agent is less than 0.5 parts by weight, the foaming effect cannot be sufficiently obtained, so that the ratio of insect-bubble bubbles in the foam increases, and the seat cushion pad is formed during molding. Cracks may appear on the screen. If the amount of the foaming agent exceeds 5 parts by weight, the foaming effect becomes too strong and the resonance magnification becomes high.
  • the foaming agent may have a polymerization ratio of ethylene oxide of '100%. Further, the addition amount of the foaming agent is more preferably 1 to 4 parts by weight.
  • the silicone foam stabilizer preferably has an average free foam height of not less than 225 mm.
  • the average value of the free foam height which indicates the characteristics of the silicone foam stabilizer used, is the foam height measured using the model formulation shown in the following (Table 1).
  • the average value of the free foaming foam height is obtained by evaluating the properties of the foam stabilizer using a model compound.
  • the height of the free-foamed foam was determined by weighing the raw materials shown in Table 1 above so that the total weight would be 147.3 ⁇ 0.5 g, the bottom diameter being 105 mm, and the opening diameter being 1 mm. It is determined by measuring the height to the top of the foam when foamed in a truncated cone with a height of 4 O mm and a height of 195 mm.
  • the polyol component containing the polyol conjugate in the upper column of (Table 1) was uniformly premixed, and the polyol component and the isocyanate component were separately mixed. Measure the height of the foam formed by adjusting the temperature to 25 ° C, mixing uniformly, and foaming under the specified conditions. Mixing is performed using a well-known stirrer capable of uniformly stirring the polyol component and the isocyanate component in a short time of about 5 seconds.
  • silicone foam stabilizer By using such a silicone foam stabilizer, the resonance magnification at 24 Hz is low, and It is possible to more reliably and stably obtain a high-damping seat or solution pad having a vibration transmissibility near 6 Hz which is equal to or less than the conventional one. Silicon uniform Foaming agents that have an average free foam height of at least 25 mm can be used, even if a mixture of two or more components is used.
  • the silicone foam stabilizer is represented by polydimethylsiloxane or (chemical formula 1), in which the equivalent ratio m / n of the ethylene copolymer unit m and the propylene oxide unit n in the copolymerized polyether is 0. It is preferably a compound having a ratio of 4 / 0.6 to 0.05 / 0.95.
  • X is an organic residue having 1 to 4 carbon atoms
  • R is an alkyl group or an acyl group
  • X is 80 to 250
  • y is 0 to 50.
  • Figure 1 is a cross-sectional view of an example of a seat cushion pad with a seat thickness of 65 mm.
  • Figure 2 is a diagram showing the method of measuring the free foam height.
  • Fig. 3 is a graph showing the measurement results of the vibration transmissibility of the seat cushion pad at a frequency of 10 Hz or less.
  • the polyol compound used in the flexible polyurethane foam of the present invention may be any type as long as the resonance frequency, resonance magnification and elastic modulus of the core layer of the obtained sheet cushion pad are within predetermined ranges.
  • the polyol compound of the present invention is preferably a combination of polyoxyalkylene glycol and polymer polyol.
  • the polyoxyalkylene glycol a so-called polyether polyol obtained by adding an alkylene oxide to a polyfunctional alcohol compound as an initiator is usually used.
  • polyfunctional alcohol compounds examples include ethylene glycol, propylene glycol, glycerin, trimethylolpropane, pentaerythritol, sorbitol, sucrose, triethanolamine, and diethanolamine.
  • the added compound can be exemplified.
  • Alkylene oxides that are addition-polymerized to polyfunctional alcohol compounds include those having 2 or more carbon atoms, such as ethylene oxide, 1,2-propylene oxide, 2-butylene oxide, and 3-butylene oxide. And styrene oxide.
  • these alkylene oxides those in which propylene oxide and / or butylene oxide are used in combination with ethylene oxide are low in cost, and the characteristics of the obtained seat cushion pad are good. And so on.
  • those containing ethylene oxide ring-opened ethylene oxide units in an addition ratio of 3 to 50% by weight, more preferably 3 to 25% by weight are preferable.
  • the boroxyalkylene glycol may be either a random polymer or a block polymer of the above-described alkylene oxide, but a polymer containing a oxyethylene unit at the terminal is preferable because of good reactivity with an isocyanate group.
  • 1 quaternizing rate of end is preferably one containing poly O carboxymethyl 3 wt 0/0 or more O Kishiarukiren alkylene glycol units, those containing 5 wt 0/6 or more Gayori It is preferably, particularly preferably, 10 to 20% by weight.
  • the molecular weight between crosslinks (molecular weight per hydroxyl group) of such a polyoxyalkylene polyol is preferably about 1000 to 400, and particularly, the molecular weight between crosslinks is 150 to 280. The use of 0 is preferred.
  • a polymer polyol obtained by dispersing polymer particles in the form of fine particles in a polyol compound is used.
  • Examples of the above polymer particles include homopolymers of vinyl monomers such as acrylonitrile, styrene, alkyl methacrylate, and alkyl acrylate. Or particles of an addition polymerization type polymer such as a copolymer or a condensation polymerization type polymer such as a polyester, a polyurea or a melamine resin. Among these, a homopolymer or copolymer of acrylonitrile and styrene is preferred. Particularly, a homopolymer of acrylonitrile is preferred. In addition, as the polymer particles, a system containing atarilonitrile polymer fine particles is preferable because the moldability of the sheet cushion pad is good.
  • the proportion of the polymer particles in the whole polyol component is preferably not more than 40% by weight, more preferably not more than 20% by weight, because if the ratio is too large, it causes economic disadvantage.
  • the ratio of the polymer particles in the entire polyol component is 1% by weight or more, and more preferably 2% by weight or more. .
  • the method of introducing such polymer particles into the polyol compound is not particularly limited.
  • the polymer particles are addition-polymerized polymers
  • the presence of a radical polymerization initiator in a polyol such as polyoxyalkylene polyol is considered.
  • a butyl monomer such as styrene or acrylonitrile below
  • PPF Polymer polyols
  • both the above-mentioned polyester polyol and the polyalkylene polyol constituting the polymer polyol have a low terminal unsaturated group concentration.
  • the terminal unsaturated group concentration is me 0.1 meq Z g The following is preferred.
  • polyisocyanate compounds include diphenylmethane diisocyanate (MDI) (purified diphenylmethane diisocyanate (p-MDI), crude MDI (c-MDI), carbodiimide modified MDI or There is uretonimine metamorphic MDI.
  • MDI diphenylmethane diisocyanate
  • p-MDI purified diphenylmethane diisocyanate
  • c-MDI crude MDI
  • carbodiimide modified MDI carbodiimide modified MDI or There is uretonimine metamorphic MDI.
  • Aromatic, alicyclic, and aliphatic polyisocyanate compounds having two or more isocyanate groups which are generally used in the production of tablets, and various polyisocyanate compounds obtained by modifying these polyisocyanate compounds.
  • the modified polyisocyanate compound thus obtained may be used for adjusting properties within a range that does not impair the object of the present invention.
  • Specific examples of polyisocyanate compounds that can be used in combination with diphenylmethane diisocyanate (MDI) include toluene diisocyanate (TDI) and xylylene
  • modified products include prepolymers of polyisocyanate compounds, modified isocyanates, modified urea, modified carbodiimides, and the like.
  • Water is used as the blowing agent, but it is also preferable to use another blowing agent together with water.
  • HCFC-141b, HFC-134a, HFC_245fa, HFC-3.65mfc, etc., and halogenated hydrocarbons such as cyclopentane-n-pentane Examples include boiling point aliphatic or alicyclic hydrocarbons, liquefied carbon dioxide, and the like. To use them together, it is preferable to use liquefied carbon dioxide gas.
  • the core density is added to a 50-65 kg / m 3 is, shea - balance with other properties such as naturally required 25% compression hardness as cushions pad good sheet This is preferable because a cushion pad can be obtained.
  • foam stabilizer use a foam stabilizer having an average value of free foam foam height of not less than 225 mm evaluated by the foaming stock solution composition described in (Table 1).
  • foam stabilizers such as polydimethylsiloxane and derivatives thereof can be used without any limitation, and the compound represented by the above-mentioned formula (1) is preferable.
  • silicone-based foam stabilizer a commercially available product is preferably used.
  • SF2965, SF2962, SF2904, SF2908, SRX294A, (Toray Dow Corning Silicon) , L-5366, L-5 309 (manufactured by Nippon Rikiichi Co., Ltd.), B 8680 (Gold Schmitttone: h®) and the like are commercially available.
  • L-5366, L-5309 are compounds represented by the above-mentioned (Chemical formula 1), and the m / n ratio and x, y belong to suitable ranges. This is illustrated as an example.
  • a foam stabilizer having a surface tension lowering ability difference between surface tension before and after addition to the polyol component of about 1 (dyne / cm).
  • the use of 2962, B 8680, L-5366, L-5309 is particularly preferred.
  • Use with other foam stabilizers If you are, SF 2 9 6 5, SF 2 96 2, B 8 6 80, L- 5 3 66, L foam stabilizer selected from a 53 0 9 1 0 weight ZenSeiawa agent 0 / It is preferable to use 0 or more.
  • a foaming agent in addition to the above-mentioned silicone-based foam stabilizer.
  • the side of 50 wt. 0/0 or more polymers, the A compound produced by subjecting ethylene oxide or propylene oxide to ring-opening polymerization can be used for the polyfunctional alcohol compound used in the production of the prepared polyoxyalkylene polyol.
  • polyfunctional alcohol compound to be used water, ethylene glycol, 1,4-butanediol, glycerin, trimethylolpropane and the like are suitable.
  • the foam breaking agent may be a block copolymer of ethylene oxide and propylene oxide, or may be a random copolymer.
  • suitable commercially available products include Pull Mouth Nick (manufactured by BASF), EP-505S (manufactured by Tanigaku) and the like.
  • urethanization catalysts examples include triethylenediamine (TEDA, Dab c0), bis (N, N-dimethylamino-2-ethyl) ether, N, N, ⁇ ', ⁇ ' -tetramethylhexamethylene diamine
  • Amine-based catalysts such as benzene, bis (-dimethylaminoethyl) ether (TOYOCAT-II; manufactured by Tosoh), metal carboxylate such as potassium acetate and potassium octylate, and organic gold such as dibutyltin dilaurate. Genus compounds and the like.
  • the use of an amine catalyst is preferred in that it is suitable for the production of a water-foamable polyurethane foam.
  • a low-molecular-weight polyvalent active hydrogen compound as required, and the rigidity and the like of the seat cushion pad can be easily adjusted.
  • low molecular weight polyvalent active hydrogenated compounds include polyhydric alcohols such as ethylene glycol, propylene glycol, 1,4-butanediol, trimethylolpropane, and glycerin, and polyhydric alcohol pages thereof.
  • alkanolamines such as noethanolamine, diethanolamine, triethanolamine, N-methyldiethanolamine and the like. These compounds may be used alone or in combination of two or more. The use of commercially available products using these compounds is also suitable, for example, KL-110 (manufactured by Mitsui Chemicals), Hardmaster 1 (manufactured by Daiichi Kogyo Seiyaku), EL-980. (Made by Asahi Glass Co., Ltd.).
  • the amount of each component used in the polyurethane foam raw material containing the polyol mixture, the polyisocyanate component, the foaming agent, the catalyst, and the foam stabilizer is usually as follows. Needless to say, the amount of the core layer of the cushion pad can be appropriately changed in order to adjust the elastic modulus, hardness, density, and the like.
  • the equivalent ratio of the hydroxyl group of the polyol component containing the polyol compound to the isocyanate group of the polyisocyanate component is 0.85 to 1.15 (8.55 in the index notation). To 115), and more preferably approximately equivalent weight 0 (100 in the exponential notation).
  • the amount of 7K used is usually 0.1 to 8 parts by weight, preferably 2 to 4 parts by weight, based on 100 parts by weight of the polyol compound.
  • the amount of the catalyst to be used is generally 10 parts by weight or less, preferably 0.05 to 1.0 part by weight, based on 100 parts by weight of the polyol compound.
  • the amount of the foam stabilizer used is usually 0.01 to 5 parts by weight (in the case of a foam stabilizer diluted with a plasticizer or the like, based on the active ingredient) with respect to 100 parts by weight of the polyol compound. Preferably it is 0.1 to 2 parts by weight.
  • various additives such as an emulsifier, an antioxidant, an ultraviolet absorber, an antioxidant, a filler, a flame retardant, a plasticizer, a colorant, a fungicide and an antibacterial agent are added to the polyurethane foam raw material. Agents can be added as needed.
  • Polyurethane foam raw materials containing the above-mentioned various components are available in various types depending on the use to which the sheet cushion pad is applied. It is molded into a seat pad in a predetermined mold for the dog.
  • a usual method can be adopted as a molding method. For example, a polyol compound, a foaming agent, a catalyst, a foam stabilizer, a cross-linking agent, and, if necessary, an additive are preliminarily mixed into a polyol component in a predetermined amount, and then the mixture is mixed with a polyol component.
  • the polyurethane foam raw material obtained by rapid mixing is poured into a mold and demolded after a predetermined time to obtain a seat cushion.
  • a soft polyurethane foam as a pad is obtained.
  • the fit of the seat cushion knob when seated varies depending on the thickness of the skin layer formed as the polyurethane foam surface layer during molding.
  • the thickness and properties of the skin layer vary depending on the packing ratio during molding, the mold temperature during molding, the reaction speed of forming the polyurethane foam, and the like. Under the pad forming conditions of about 1.1 to 1.3 and the mold temperature of about 50 to 70 ° C, the thickness and properties of the skin layer do not change much.
  • the thickness of the skin layer is about 1 Omm for commonly used sheet pads, and the core density of the foam is about 80 to 90% of the total density including the skin layer, and is about 85% in most cases. Becomes
  • a resin supporter made of polyurethane, polypropylene, polyethylene, polystyrene or its foam, or a sabot (reinforcing material) such as PP cloth, coarse blanket, or non-woven fabric, is pre-formed at the time of molding. It is also possible to laminate by an integral molding method that inserts into the mold or by bonding after foam molding.
  • a seat or the like that is actually mounted in a car rain is provided with the seat cushion pad of the present invention, which is covered with outer layers such as genuine leather, moquettes, tricots, jerseys, and fabrics.
  • outer layers such as genuine leather, moquettes, tricots, jerseys, and fabrics.
  • a measurement sample of 100 mm ⁇ 100 mm ⁇ 50 mm (t) was taken from the core portion (excluding the skin layer) of the seat cushion pad, and the measurement was performed in accordance with JIS-6400.
  • the removed skin layer is about 1 Omm.
  • the resonance frequency (Hz) was obtained from the vibration transmissibility curve obtained by performing a forced vibration test with an amplitude of ⁇ 2.5 mm by applying a 50 kg iron-type press plate in accordance with JASO B-407. , Resonance magnification, and vibration transmissibility (6 Hz, 1 OHz) were measured.
  • a sheet cushion vibration tester C-1002 DL manufactured by Ito Seiki Co., Ltd. was used.
  • a seat cushion covered with a polyurethane foam pad skin material was actually mounted on a vehicle, and five panelists were riding and running, and a sensory evaluation was performed using an actual vehicle.
  • the total amount of the polyol components excluding the isocyanate component was weighed to about 600 g (equivalent to 5 times of about 107 g per use). And placed in a cylindrical container with a capacity of 1 L, and using an auto homomixer AM-M (special machine Kako Co., Ltd.), a diameter of 4 Omm. A total of 12 sheets were attached, and the mixture was stirred at 3500 rpm for 5 minutes to adjust the polyol component. Leave this voryl component for 12 to 20 hours and leave it as a frustoconical container with a bottom diameter of 105 mm, an opening diameter of 14 Omm, and a height of 195 mm.
  • AM-M special machine Kako Co., Ltd.
  • the free foamed foam height was determined by placing a foamed container containing a foam on a horizontal table and measuring the height using a gold scale.
  • Figure 2 shows the measurement of the free foam height.
  • the measurement results of the free foam height (unit: mm) are shown in (Table 2) and (Table 3). Free foaming was performed 5 times, and the maximum value, the minimum value, and the average value of 5 times were shown.
  • the x / y ratio of the foam stabilizer is preferably 0.75 / 0.25 or more.
  • the properties of the raw materials used in the following examples are summarized in (Table 4).
  • Table 4 the x / y ratio and m / n ratio of the foam stabilizer are values measured by NMR. The measurement was carried out using FT-NMR DPX 400 S (manufactured by BURKER), and the foam stabilizer was measured as a 2% by weight solution of heavy-mouthed form. x / y and m / n are respectively
  • Pl, P2, P3, and P5 are the following HP 1 in (I-Dai 2): — OCH 2 — group, H- ( ⁇ CH—) group (3.0 to 4.0 ppm)
  • the formulation used to produce the seat cushion pad of Example 1 is shown in (Table 5).
  • the compounding ratio was expressed in parts by weight with the total of the polyol compounds being 100 parts by weight.
  • the components described in (Table 5) were blended in the usual manner at the weight ratios shown in the same table, mixed uniformly, and then poured into a mold of a predetermined shape, foamed and cured, and then foamed and cured. I got it.
  • a seat cushion with a thickness of 65 mm was manufactured.
  • This sheet cushion pad uses a sheet cushion pad mold for an actual vehicle, and a polypropylene net Nisseki Conwed Net (Nisseki Goho) is used as a support member on the bottom side. Tree Products Co., Ltd.) was used.
  • Fig. 1 (A) shows the dog in the front-rear direction, that is, the cross section in the front-rear direction when a person is seated.
  • Figs. 1 (B) to (D) show the positions (a) to (c) in Fig. 1 (A).
  • 5 shows a cross section in the left-right direction of FIG. 5, where (a) is a seat surface portion and the thickness is 65 mm.
  • the position where the hardness of the seat cushion pad is measured is the seat surface, as shown in FIG.
  • the position below the hip point where the elastic modulus of the core layer was measured is near this hardness measurement position.
  • Fig. 3 shows a graph of the measured vibration transmissibility.
  • the seat cushion pad of the present invention has a resonance frequency, a resonance magnification, and a rebound resilience of the core layer within a predetermined range.
  • the chick feeling was good, and the fit when sitting was also good.
  • Comparative Example 1 the resonance magnification was large, and it did not satisfy the feeling of humming when used as an actual sheet cushion pad.
  • the sheet cushion pad of the present invention can be used for a sheet cushion pad for a vehicle, particularly an automobile, which vibrates when used.
  • L 53bb says 2 ⁇ L two-car ⁇ ⁇ ⁇ ⁇ / 1
  • EP 3033 PPG, 0HV 34mgK0H / g

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  • Engineering & Computer Science (AREA)
  • Aviation & Aerospace Engineering (AREA)
  • Transportation (AREA)
  • Mechanical Engineering (AREA)
  • Polyurethanes Or Polyureas (AREA)
  • Silicon Polymers (AREA)
  • Chair Legs, Seat Parts, And Backrests (AREA)
  • Casting Or Compression Moulding Of Plastics Or The Like (AREA)

Abstract

La présente invention concerne un coussin de siège destiné à des véhicules soumis à des vibrations, qui présente une fréquence de transmission des vibrations proche de 6 Hz maintenue à un niveau d'amortissement aussi élevé que celui obtenu classiquement avec une amplification de la résonance réduite à un niveau compris entre 2 et 4 Hz ; ce coussin produisant une excellente sensation de confort lorsque plus d'une personne s'assied en même temps. Le coussin de siège est formé dans une mousse polyuréthane moulée et sa surface d'assise comprend une structure monocouche; il présente une amplification de la résonance à 2-4 Hz, mesurée au moyen d'un test de vibration forcée effectué à une amplitude de ? 2,5 mm avec une charge d'une tôle d'acier sous pression rectifiée qui peut aller jusqu'à 4, un module de rebondissement aux impacts d'une couche centrale qui est compris entre 50 et 70 %. La matière de mousse polyuréthane renferme, en tant que constituants polyol, entre 60 et 80 parties en poids d'un polyol de polyéther ayant une valeur hydroxyle comprise entre 20 et 40 mg KOH/g et entre 40 et 20 parties en poids d'un polyol polymère ayant une valeur hydroxyle comprise entre 15 et 30 mg KOH/g, un agent de formage de mousse en silicium, un agent moussant, et, en tant que composé polyisocyanate, du diphényl-méthane-diisocyanate.
PCT/JP2001/001698 2001-03-05 2001-03-05 Coussin de siege Ceased WO2002069765A1 (fr)

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PCT/JP2001/001698 WO2002069765A1 (fr) 2001-03-05 2001-03-05 Coussin de siege
JP2002520805A JP3644640B2 (ja) 2001-03-05 2001-03-05 シートクッションパッド

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Cited By (13)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2005320437A (ja) * 2004-05-10 2005-11-17 Honda Motor Co Ltd 自動車座席用ウレタンフォーム
WO2006057255A1 (fr) * 2004-11-24 2006-06-01 Asahi Glass Company, Limited Mousse de polyurethane souple, procede de production de cette derniere et de sieges d'automobiles
JP2006169365A (ja) * 2004-12-15 2006-06-29 Bridgestone Corp 軟質ポリウレタン発泡成形体及び自動車用内装材
JP2007100031A (ja) * 2005-10-07 2007-04-19 Inoac Corp シートクッション及びその製造方法
WO2009151104A1 (fr) * 2008-06-11 2009-12-17 日本発條株式会社 Matériau pour coussin de siège et son procédé de fabrication
JP2010532401A (ja) * 2007-07-05 2010-10-07 ビーエーエスエフ ソシエタス・ヨーロピア 快適性が増したポリウレタン製品の発泡に使用される樹脂組成物
US7838566B2 (en) * 2005-10-21 2010-11-23 Evonik Goldschmidt Gmbh Process for the preparation of polyurethane cold cure foams
JP2011012277A (ja) * 2010-09-29 2011-01-20 Inoac Corp シートクッションの製造方法
US20110034576A1 (en) * 2008-02-11 2011-02-10 Frauke Henning The invention relates to the use of foam stabilizers, produced on the basis of sustainable raw materials, for prroducing polyurethane foams
JP2021105077A (ja) * 2019-12-26 2021-07-26 株式会社イノアックコーポレーション ポリウレタンフォーム成形体のその製造方法
JP2022072896A (ja) * 2020-10-30 2022-05-17 株式会社イノアックコーポレーション ポリウレタンフォームとその製造方法
EP4129118A4 (fr) * 2020-03-31 2024-04-17 JSP Corporation Matériau central de siège de véhicule
WO2024120897A1 (fr) * 2022-12-07 2024-06-13 Basf Se Couches minces de polyuréthane et leur procédé de production

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US8324289B2 (en) 2004-11-24 2012-12-04 Asahi Glass Company, Limited Flexible polyurethane foam, process for its production, and seat for automobile
WO2006057255A1 (fr) * 2004-11-24 2006-06-01 Asahi Glass Company, Limited Mousse de polyurethane souple, procede de production de cette derniere et de sieges d'automobiles
JPWO2006057255A1 (ja) * 2004-11-24 2008-06-05 旭硝子株式会社 軟質ポリウレタンフォーム、その製造方法、および自動車用シート
CN101061155B (zh) * 2004-11-24 2010-07-21 旭硝子株式会社 软质聚氨酯泡沫塑料、其制造方法以及汽车用座垫
JP2006169365A (ja) * 2004-12-15 2006-06-29 Bridgestone Corp 軟質ポリウレタン発泡成形体及び自動車用内装材
JP2007100031A (ja) * 2005-10-07 2007-04-19 Inoac Corp シートクッション及びその製造方法
US7838566B2 (en) * 2005-10-21 2010-11-23 Evonik Goldschmidt Gmbh Process for the preparation of polyurethane cold cure foams
JP2010532401A (ja) * 2007-07-05 2010-10-07 ビーエーエスエフ ソシエタス・ヨーロピア 快適性が増したポリウレタン製品の発泡に使用される樹脂組成物
US8349907B2 (en) * 2008-02-11 2013-01-08 Evonik Goldschmidt Gmbh Invention relates to the use of foam stabilizers, produced on the basis of sustainable raw materials, for prroducing polyurethane foams
US20110034576A1 (en) * 2008-02-11 2011-02-10 Frauke Henning The invention relates to the use of foam stabilizers, produced on the basis of sustainable raw materials, for prroducing polyurethane foams
WO2009151104A1 (fr) * 2008-06-11 2009-12-17 日本発條株式会社 Matériau pour coussin de siège et son procédé de fabrication
JP2011012277A (ja) * 2010-09-29 2011-01-20 Inoac Corp シートクッションの製造方法
JP2021105077A (ja) * 2019-12-26 2021-07-26 株式会社イノアックコーポレーション ポリウレタンフォーム成形体のその製造方法
JP7433897B2 (ja) 2019-12-26 2024-02-20 株式会社イノアックコーポレーション ポリウレタンフォーム成形体のその製造方法
EP4129118A4 (fr) * 2020-03-31 2024-04-17 JSP Corporation Matériau central de siège de véhicule
US12152121B2 (en) 2020-03-31 2024-11-26 Jsp Corporation Vehicle seat core material
JP2022072896A (ja) * 2020-10-30 2022-05-17 株式会社イノアックコーポレーション ポリウレタンフォームとその製造方法
JP7545867B2 (ja) 2020-10-30 2024-09-05 株式会社イノアックコーポレーション ポリウレタンフォームとその製造方法
WO2024120897A1 (fr) * 2022-12-07 2024-06-13 Basf Se Couches minces de polyuréthane et leur procédé de production

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