JP5839394B2 - Bedding cushion - Google Patents
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- JP5839394B2 JP5839394B2 JP2011240794A JP2011240794A JP5839394B2 JP 5839394 B2 JP5839394 B2 JP 5839394B2 JP 2011240794 A JP2011240794 A JP 2011240794A JP 2011240794 A JP2011240794 A JP 2011240794A JP 5839394 B2 JP5839394 B2 JP 5839394B2
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- 229920005862 polyol Polymers 0.000 claims description 83
- 150000003077 polyols Chemical class 0.000 claims description 82
- 239000011496 polyurethane foam Substances 0.000 claims description 45
- 229920005830 Polyurethane Foam Polymers 0.000 claims description 36
- 125000000524 functional group Chemical group 0.000 claims description 29
- 239000012948 isocyanate Substances 0.000 claims description 24
- 238000002156 mixing Methods 0.000 claims description 23
- 125000002887 hydroxy group Chemical group [H]O* 0.000 claims description 21
- 239000006260 foam Substances 0.000 claims description 20
- IAYPIBMASNFSPL-UHFFFAOYSA-N Ethylene oxide Chemical compound C1CO1 IAYPIBMASNFSPL-UHFFFAOYSA-N 0.000 claims description 19
- 150000002513 isocyanates Chemical class 0.000 claims description 19
- 238000000034 method Methods 0.000 claims description 15
- 238000005187 foaming Methods 0.000 claims description 14
- 239000003054 catalyst Substances 0.000 claims description 12
- 239000004088 foaming agent Substances 0.000 claims description 10
- 239000003381 stabilizer Substances 0.000 claims description 10
- 239000002994 raw material Substances 0.000 claims description 9
- 230000000052 comparative effect Effects 0.000 description 32
- 230000006835 compression Effects 0.000 description 24
- 238000007906 compression Methods 0.000 description 24
- 229920000657 LRPu Polymers 0.000 description 10
- 230000035699 permeability Effects 0.000 description 10
- UPMLOUAZCHDJJD-UHFFFAOYSA-N 4,4'-Diphenylmethane Diisocyanate Chemical compound C1=CC(N=C=O)=CC=C1CC1=CC=C(N=C=O)C=C1 UPMLOUAZCHDJJD-UHFFFAOYSA-N 0.000 description 7
- -1 ethylene oxide Polyol Chemical class 0.000 description 7
- 239000000126 substance Substances 0.000 description 6
- IMNIMPAHZVJRPE-UHFFFAOYSA-N triethylenediamine Chemical compound C1CN2CCN1CC2 IMNIMPAHZVJRPE-UHFFFAOYSA-N 0.000 description 5
- 230000007306 turnover Effects 0.000 description 4
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 4
- YMWUJEATGCHHMB-UHFFFAOYSA-N Dichloromethane Chemical compound ClCCl YMWUJEATGCHHMB-UHFFFAOYSA-N 0.000 description 3
- 206010016322 Feeling abnormal Diseases 0.000 description 3
- 239000000654 additive Substances 0.000 description 3
- 239000006185 dispersion Substances 0.000 description 3
- 238000005259 measurement Methods 0.000 description 3
- 238000000465 moulding Methods 0.000 description 3
- ZXHZWRZAWJVPIC-UHFFFAOYSA-N 1,2-diisocyanatonaphthalene Chemical compound C1=CC=CC2=C(N=C=O)C(N=C=O)=CC=C21 ZXHZWRZAWJVPIC-UHFFFAOYSA-N 0.000 description 2
- ALQLPWJFHRMHIU-UHFFFAOYSA-N 1,4-diisocyanatobenzene Chemical compound O=C=NC1=CC=C(N=C=O)C=C1 ALQLPWJFHRMHIU-UHFFFAOYSA-N 0.000 description 2
- GNDOBZLRZOCGAS-JTQLQIEISA-N 2-isocyanatoethyl (2s)-2,6-diisocyanatohexanoate Chemical compound O=C=NCCCC[C@H](N=C=O)C(=O)OCCN=C=O GNDOBZLRZOCGAS-JTQLQIEISA-N 0.000 description 2
- RGSFGYAAUTVSQA-UHFFFAOYSA-N Cyclopentane Chemical compound C1CCCC1 RGSFGYAAUTVSQA-UHFFFAOYSA-N 0.000 description 2
- 239000005057 Hexamethylene diisocyanate Substances 0.000 description 2
- 229920002323 Silicone foam Polymers 0.000 description 2
- 150000001412 amines Chemical class 0.000 description 2
- 239000002131 composite material Substances 0.000 description 2
- 150000001875 compounds Chemical class 0.000 description 2
- 210000000497 foam cell Anatomy 0.000 description 2
- 150000002366 halogen compounds Chemical class 0.000 description 2
- RRAMGCGOFNQTLD-UHFFFAOYSA-N hexamethylene diisocyanate Chemical compound O=C=NCCCCCCN=C=O RRAMGCGOFNQTLD-UHFFFAOYSA-N 0.000 description 2
- 229930195733 hydrocarbon Natural products 0.000 description 2
- 150000002430 hydrocarbons Chemical class 0.000 description 2
- 125000004435 hydrogen atom Chemical group [H]* 0.000 description 2
- 230000001771 impaired effect Effects 0.000 description 2
- IQPQWNKOIGAROB-UHFFFAOYSA-N isocyanate group Chemical group [N-]=C=O IQPQWNKOIGAROB-UHFFFAOYSA-N 0.000 description 2
- QWTDNUCVQCZILF-UHFFFAOYSA-N isopentane Chemical compound CCC(C)C QWTDNUCVQCZILF-UHFFFAOYSA-N 0.000 description 2
- 239000002184 metal Substances 0.000 description 2
- AYLRODJJLADBOB-QMMMGPOBSA-N methyl (2s)-2,6-diisocyanatohexanoate Chemical compound COC(=O)[C@@H](N=C=O)CCCCN=C=O AYLRODJJLADBOB-QMMMGPOBSA-N 0.000 description 2
- 238000011084 recovery Methods 0.000 description 2
- 239000013514 silicone foam Substances 0.000 description 2
- DVKJHBMWWAPEIU-UHFFFAOYSA-N toluene 2,4-diisocyanate Chemical compound CC1=CC=C(N=C=O)C=C1N=C=O DVKJHBMWWAPEIU-UHFFFAOYSA-N 0.000 description 2
- OKIYQFLILPKULA-UHFFFAOYSA-N 1,1,1,2,2,3,3,4,4-nonafluoro-4-methoxybutane Chemical compound COC(F)(F)C(F)(F)C(F)(F)C(F)(F)F OKIYQFLILPKULA-UHFFFAOYSA-N 0.000 description 1
- GCDWNCOAODIANN-UHFFFAOYSA-N 1,1,1,2,2-pentafluoro-2-methoxyethane Chemical compound COC(F)(F)C(F)(F)F GCDWNCOAODIANN-UHFFFAOYSA-N 0.000 description 1
- HRXXERHTOVVTQF-UHFFFAOYSA-N 1,1,1,2,3,3,3-heptafluoro-2-methoxypropane Chemical compound COC(F)(C(F)(F)F)C(F)(F)F HRXXERHTOVVTQF-UHFFFAOYSA-N 0.000 description 1
- AZYRZNIYJDKRHO-UHFFFAOYSA-N 1,3-bis(2-isocyanatopropan-2-yl)benzene Chemical compound O=C=NC(C)(C)C1=CC=CC(C(C)(C)N=C=O)=C1 AZYRZNIYJDKRHO-UHFFFAOYSA-N 0.000 description 1
- DFUYAWQUODQGFF-UHFFFAOYSA-N 1-ethoxy-1,1,2,2,3,3,4,4,4-nonafluorobutane Chemical compound CCOC(F)(F)C(F)(F)C(F)(F)C(F)(F)F DFUYAWQUODQGFF-UHFFFAOYSA-N 0.000 description 1
- JDRFUUBRGGDEIZ-UHFFFAOYSA-N 3,6-dichloro-2-methoxybenzoate;dimethylazanium Chemical compound CNC.COC1=C(Cl)C=CC(Cl)=C1C(O)=O JDRFUUBRGGDEIZ-UHFFFAOYSA-N 0.000 description 1
- 239000004604 Blowing Agent Substances 0.000 description 1
- 239000004215 Carbon black (E152) Substances 0.000 description 1
- 239000004338 Dichlorodifluoromethane Substances 0.000 description 1
- JOYRKODLDBILNP-UHFFFAOYSA-N Ethyl urethane Chemical compound CCOC(N)=O JOYRKODLDBILNP-UHFFFAOYSA-N 0.000 description 1
- 206010015535 Euphoric mood Diseases 0.000 description 1
- YCKRFDGAMUMZLT-UHFFFAOYSA-N Fluorine atom Chemical compound [F] YCKRFDGAMUMZLT-UHFFFAOYSA-N 0.000 description 1
- SVYKKECYCPFKGB-UHFFFAOYSA-N N,N-dimethylcyclohexylamine Chemical compound CN(C)C1CCCCC1 SVYKKECYCPFKGB-UHFFFAOYSA-N 0.000 description 1
- UEEJHVSXFDXPFK-UHFFFAOYSA-N N-dimethylaminoethanol Chemical compound CN(C)CCO UEEJHVSXFDXPFK-UHFFFAOYSA-N 0.000 description 1
- OFBQJSOFQDEBGM-UHFFFAOYSA-N Pentane Chemical compound CCCCC OFBQJSOFQDEBGM-UHFFFAOYSA-N 0.000 description 1
- 239000004698 Polyethylene Substances 0.000 description 1
- 239000004721 Polyphenylene oxide Substances 0.000 description 1
- 208000004210 Pressure Ulcer Diseases 0.000 description 1
- UKLDJPRMSDWDSL-UHFFFAOYSA-L [dibutyl(dodecanoyloxy)stannyl] dodecanoate Chemical compound CCCCCCCCCCCC(=O)O[Sn](CCCC)(CCCC)OC(=O)CCCCCCCCCCC UKLDJPRMSDWDSL-UHFFFAOYSA-L 0.000 description 1
- 230000000996 additive effect Effects 0.000 description 1
- 125000001931 aliphatic group Chemical group 0.000 description 1
- 125000002947 alkylene group Chemical group 0.000 description 1
- 125000003118 aryl group Chemical group 0.000 description 1
- 210000004027 cell Anatomy 0.000 description 1
- 239000003086 colorant Substances 0.000 description 1
- 230000008602 contraction Effects 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 230000003111 delayed effect Effects 0.000 description 1
- 230000001419 dependent effect Effects 0.000 description 1
- 239000012973 diazabicyclooctane Substances 0.000 description 1
- 239000012975 dibutyltin dilaurate Substances 0.000 description 1
- PXBRQCKWGAHEHS-UHFFFAOYSA-N dichlorodifluoromethane Chemical compound FC(F)(Cl)Cl PXBRQCKWGAHEHS-UHFFFAOYSA-N 0.000 description 1
- 235000019404 dichlorodifluoromethane Nutrition 0.000 description 1
- KORSJDCBLAPZEQ-UHFFFAOYSA-N dicyclohexylmethane-4,4'-diisocyanate Chemical compound C1CC(N=C=O)CCC1CC1CCC(N=C=O)CC1 KORSJDCBLAPZEQ-UHFFFAOYSA-N 0.000 description 1
- 239000000539 dimer Substances 0.000 description 1
- AFABGHUZZDYHJO-UHFFFAOYSA-N dimethyl butane Natural products CCCC(C)C AFABGHUZZDYHJO-UHFFFAOYSA-N 0.000 description 1
- XXBDWLFCJWSEKW-UHFFFAOYSA-N dimethylbenzylamine Chemical compound CN(C)CC1=CC=CC=C1 XXBDWLFCJWSEKW-UHFFFAOYSA-N 0.000 description 1
- SZXQTJUDPRGNJN-UHFFFAOYSA-N dipropylene glycol Chemical compound OCCCOCCCO SZXQTJUDPRGNJN-UHFFFAOYSA-N 0.000 description 1
- 230000007613 environmental effect Effects 0.000 description 1
- 239000004744 fabric Substances 0.000 description 1
- 239000000945 filler Substances 0.000 description 1
- 239000003063 flame retardant Substances 0.000 description 1
- 239000011737 fluorine Substances 0.000 description 1
- 229910052731 fluorine Inorganic materials 0.000 description 1
- 239000004872 foam stabilizing agent Substances 0.000 description 1
- DMEGYFMYUHOHGS-UHFFFAOYSA-N heptamethylene Natural products C1CCCCCC1 DMEGYFMYUHOHGS-UHFFFAOYSA-N 0.000 description 1
- YUWFEBAXEOLKSG-UHFFFAOYSA-N hexamethylbenzene Chemical group CC1=C(C)C(C)=C(C)C(C)=C1C YUWFEBAXEOLKSG-UHFFFAOYSA-N 0.000 description 1
- NIMLQBUJDJZYEJ-UHFFFAOYSA-N isophorone diisocyanate Chemical compound CC1(C)CC(N=C=O)CC(C)(CN=C=O)C1 NIMLQBUJDJZYEJ-UHFFFAOYSA-N 0.000 description 1
- 239000000463 material Substances 0.000 description 1
- 125000005474 octanoate group Chemical group 0.000 description 1
- OOCYPIXCHKROMD-UHFFFAOYSA-M phenyl(propanoyloxy)mercury Chemical compound CCC(=O)O[Hg]C1=CC=CC=C1 OOCYPIXCHKROMD-UHFFFAOYSA-M 0.000 description 1
- 229920000570 polyether Polymers 0.000 description 1
- 229920000573 polyethylene Polymers 0.000 description 1
- 229920000642 polymer Polymers 0.000 description 1
- 239000000047 product Substances 0.000 description 1
- 239000004094 surface-active agent Substances 0.000 description 1
- 239000012974 tin catalyst Substances 0.000 description 1
- CYRMSUTZVYGINF-UHFFFAOYSA-N trichlorofluoromethane Chemical compound FC(Cl)(Cl)Cl CYRMSUTZVYGINF-UHFFFAOYSA-N 0.000 description 1
- 229940029284 trichlorofluoromethane Drugs 0.000 description 1
- 239000013638 trimer Substances 0.000 description 1
- 230000000007 visual effect Effects 0.000 description 1
- 239000011800 void material Substances 0.000 description 1
- 239000008096 xylene Substances 0.000 description 1
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- Polyurethanes Or Polyureas (AREA)
- Mattresses And Other Support Structures For Chairs And Beds (AREA)
Description
本発明は、ベッドまたは枕などに用いられる寝具用クッションに関する。 The present invention relates to a cushion for bedding used for a bed or a pillow.
従来、クッションをカバー材で覆ったベッドまたは枕などの寝具は、クッションとして低反発ポリウレタンフォームを用いるものがある。
低反発ポリウレタンフォームは、寝具用クッションに使用した場合、局部的な圧迫及び負荷が少なく体圧を分散することができ、疲労感の軽減、褥瘡防止に効果があることが知られている。なお、低反発ウレタンフォームのは規格により定められているわけではなく、一般的には反発弾性（ＪＩＳ Ｋ ６４００−３準拠）１０％未満のものが低反発ポリウレタンフォームと称されている。
Conventionally, some bedding such as a bed or a pillow having a cushion covered with a cover material uses a low-resilience polyurethane foam as a cushion.
It is known that when the low-resilience polyurethane foam is used for a cushion for bedding, the body pressure can be dispersed with little local pressure and load, and it is effective in reducing fatigue and preventing pressure ulcers. Note that the low-resilience urethane foam is not defined by the standard, and generally, the rebound resilience (based on JIS K 6400-3) of less than 10% is referred to as a low-resilience polyurethane foam.
しかし、低反発ポリウレタンフォームは体圧分散性については良いが、身体（頭部の場合を含む）の沈み込みが大きく、かつスローリカバリー性（復元が遅い）である。そのため、寝返り時に低反発ポリウレタンフォームがそれまでの圧縮状態から戻るのが遅れて身体と低反発ポリウレタンフォームとの間に隙間が発生し、低反発ポリウレタンフォームの復元反発力による寝返り補助作用が得られないことから、身体の負荷が大きい問題がある。特に、病気や高齢などにより体力が落ちている人にとっては、寝返り時の負担が大きかった。さらに、低反発ポリウレタンフォームは温度依存性が大のため、夏季と冬季で触感に違いがあり、使用者に違和感を感じさせる問題があり、しかも通気性が悪く、蒸れやすい問題もあった。 However, the low-resilience polyurethane foam has good body pressure dispersibility, but the body (including the case of the head) is largely submerged and has slow recovery (slow recovery). As a result, the low-resilience polyurethane foam is delayed in returning from its compressed state at the time of turning over, and a gap is generated between the body and the low-resilience polyurethane foam. Because there is no, there is a problem that the physical load is large. In particular, for those who are physically weak due to illness or old age, the burden of turning over was great. Furthermore, since the low resilience polyurethane foam is highly temperature-dependent, there is a difference in touch between summer and winter, and there is a problem that the user feels uncomfortable, and there is also a problem that air permeability is poor and stuffiness tends to occur.
また、枕やベッドマットのクッションを、低反発ポリウレタンフォームと高反発ポリウレタンフォームの積層、あるいは部分的な組み合わせの複合体で構成することが提案されている。
しかし、低反発ポリウレタンフォームと高反発ポリウレタンフォームとの複合体は、構造が複雑で高価になる問題がある。
In addition, it has been proposed that pillows and bed mat cushions are composed of a laminate of low-resilience polyurethane foam and high-resilience polyurethane foam or a composite of partial combinations.
However, the composite of low-resilience polyurethane foam and high-resilience polyurethane foam has a problem that the structure is complicated and expensive.
なお、寝具用クッションを高反発ポリウレタンフォームで構成すれば、高反発ポリウレタンフォームの迅速な復元作用で寝返りを補助して寝返りを容易にし、寝返り時の身体的負荷を軽減することができる。
しかしながら、従来の高反発ポリウレタンフォームは、２５％圧縮荷重（ＪＩＳ Ｋ ６４００−２ Ｄ法準拠）が５０Ｎ以上の高硬度であるため、寝具用クッションとして使用した場合には体圧分散性に劣り、疲労が取れにくい問題がある。
If the cushion for bedding is made of a high-resilience polyurethane foam, the high-resilience polyurethane foam can be quickly turned over by the quick restoring action of the high-resilience polyurethane foam, and the physical load during turning over can be reduced.
However, since the conventional high-resilience polyurethane foam has a high hardness of 25% compression load (based on JIS K 6400-2 D method) of 50 N or more, when used as a cushion for bedding, the body pressure dispersibility is inferior. There is a problem that it is difficult to get rid of fatigue.
本発明は前記の点に鑑みなされたものであって、寝返りがし易く、かつ体圧分散性が良く、構造が簡単で安価な寝具用クッションの提供を目的とする。 The present invention has been made in view of the above points, and an object of the present invention is to provide a cushion for bedding that is easy to turn over, has good body pressure dispersibility, has a simple structure, and is inexpensive.
請求項１の発明は、ポリオール、イソシアネート、触媒、発泡剤及び整泡剤を含むポリウレタンフォーム原料を発泡させた軟質ポリウレタンフォームからなる寝具用クッションにおいて、前記ポリオールが以下のＡ〜Ｄの４種類からなり、Ａ：水酸基価２０〜４０ｍｇＫＯＨ／ｇ、分子量４０００〜９０００、官能基数３、エチレンオキサイド含有量１０〜２５％のポリオール、Ｂ：水酸基価２０〜１１５ｍｇＫＯＨ／ｇ、分子量１０００〜４０００、官能基数２、エチレンオキサイド含有量５％以下のポリオール、Ｃ：水酸基価２０〜６０ｍｇＫＯＨ／ｇ、分子量２０００〜５０００、官能基数２、エチレンオキサイド含有量２５〜７０％のポリオール、Ｄ：水酸基価４０〜８０ｍｇＫＯＨ／ｇ、分子量２０００〜５０００、官能基数３、エチレンオキサイド含有量５０〜９０％のポリオール、Ａの配合量（重量部）が４０〜６５であり、前記軟質ポリウレタンフォームは、反発弾性（ＪＩＳ Ｋ ６４００−３準拠）が５０％以上、２５％圧縮荷重（ＪＩＳ Ｋ ６４００−２ Ｄ法準拠）が２０Ｎ以下であることを特徴とする。 The invention of claim 1 is a cushion for bedding made of a flexible polyurethane foam obtained by foaming a polyurethane foam raw material containing a polyol, an isocyanate, a catalyst, a foaming agent and a foam stabilizer, and the polyol is composed of the following four types A to D: A: hydroxyl value 20-40 mgKOH / g, molecular weight 4000-9000, functional group number 3, polyol with ethylene oxide content 10-25%, B: hydroxyl value 20-115 mgKOH / g, molecular weight 1000-4000, functional group number 2 , A polyol having an ethylene oxide content of 5% or less, C: a hydroxyl value of 20 to 60 mgKOH / g, a molecular weight of 2000 to 5000, a polyol having a functional group number of 2 and an ethylene oxide content of 25 to 70%, D: a hydroxyl value of 40 to 80 mgKOH / g , Molecular weight 2000-5000, functional group number 3, Chi alkylene oxide content 50-90% of the polyol, the amount of A (parts by weight) is 40 to 65, wherein the flexible polyurethane foam, resilience (JIS K 6400-3 compliant) is 50% or more, 25% compression The load (based on JIS K 6400-2 D method) is 20 N or less.
請求項２の発明は、請求項１において、
Ａ〜Ｄの配合量（重量部）が、
Ａの配合量＝４０〜６５、Ｄの配合量＝５〜３０
（Ａ＋Ｄ）／（Ａ＋Ｂ＋Ｃ＋Ｄ）×１００＝６０〜８０(重量％)
Ｂの配合量＝１０〜２０、Ｃの配合量＝１０〜２０
（Ｂ＋Ｃ）／（Ａ＋Ｂ＋Ｃ＋Ｄ）×１００＝２０〜４０(重量％)
を満たすことを特徴とする。
The invention according to claim 2, Oite to claim 1,
The blending amount (parts by weight) of A to D is
A blending amount = 40 to 65, D blending amount = 5 to 30
(A + D) / (A + B + C + D) × 100 = 60-80 (% by weight)
Blending amount of B = 10-20, blending amount of C = 10-20
(B + C) / (A + B + C + D) × 100 = 20-40 (% by weight)
It is characterized by satisfying.
本発明の寝具用クッションを構成する軟質ポリウレタンフォームは、反発弾性（ＪＩＳ Ｋ ６４００−３準拠）が５０％以上と高反発性であるため、寝返り時の復元が速やかであり、復元時の反発力で寝返りを補助し、寝返りをし易くする。さらに、本発明の寝具用クッションを構成する軟質ポリウレタンフォームは、２５％圧縮荷重（ＪＩＳ Ｋ ６４００−２ Ｄ法準拠）が２０Ｎ以下と低硬度であるため、体圧分散性が良く、低反発ポリウレタンフォームと高反発ポリウレタンフォームと組み合わせる必要がないため、寝具用クッションの構造が簡単で安価なものになる。 Since the soft polyurethane foam constituting the cushion for bedding of the present invention has a high resilience of 50% or more, the resilience (based on JIS K 6400-3), the restoration at the time of turning over is quick, and the resilience at the time of restoration. Helps you turn over and make it easier to turn over. Furthermore, the flexible polyurethane foam constituting the cushion for bedding of the present invention has a low hardness of 25N compression load (conforming to JIS K 6400-2 D method) of 20 N or less, and thus has good body pressure dispersibility and low resilience polyurethane. Since it is not necessary to combine foam with high resilience polyurethane foam, the structure of the cushion for bedding becomes simple and inexpensive.
以下、本発明における実施形態について説明する。本発明の寝具用クッションは、ポリオール、イソシアネート、触媒、発泡剤及び整泡剤を含むポリウレタンフォーム原料を発泡させた軟質ポリウレタンフォームからなり、軟質ポリウレタンフォームが、反発弾性（ＪＩＳ Ｋ ６４００−３準拠）５０％以上、２５％圧縮荷重（ＪＩＳ Ｋ ６４００−２ Ｄ法準拠）２０Ｎ以下である。 Hereinafter, embodiments of the present invention will be described. The cushion for bedding of the present invention is made of a flexible polyurethane foam obtained by foaming a polyurethane foam raw material containing a polyol, an isocyanate, a catalyst, a foaming agent and a foam stabilizer, and the flexible polyurethane foam has a rebound resilience (conforms to JIS K 6400-3). 50% or more, 25% compression load (based on JIS K 6400-2 D method) 20 N or less.
本発明において使用されるポリオールとしては、次に示す水酸基価（ＯＨＶ）、分子量（ＭＷ）、官能基数、エチレンオキサイド含有量（ＥＯ含有量）を有するＡ〜Ｄの４種類のポリオールが用いられる。なお本発明におけるポリオールの分子量は重量平均分子量である。
Ａ：水酸基価２０〜４０ｍｇＫＯＨ／ｇ、分子量４０００〜９０００、官能基数３、エチレンオキサイド含有量１０〜２５％のポリオール
Ｂ：水酸基価２０〜１１５ｍｇＫＯＨ／ｇ、分子量１０００〜４０００、官能基数２、エチレンオキサイド含有量５％以下のポリオール
Ｃ：水酸基価２０〜６０ｍｇＫＯＨ／ｇ、分子量２０００〜５０００、官能基数２、エチレンオキサイド含有量２５〜７０％のポリオール
Ｄ：水酸基価４０〜８０ｍｇＫＯＨ／ｇ、分子量２０００〜５０００、官能基数３、エチレンオキサイド含有量５０〜９０％のポリオール
また、前記ポリオールＡ〜Ｄの配合量（重量部）は、全ポリオールの合計量１００重量部中、以下の量からなる。次の式においてＡはポリオールＡの配合量、ＢはポリオールＢの配合量、ＣはポリオールＣの配合量、ＤはポリオールＤの配合量をそれぞれ示す。
Ａの配合量＝４０〜６５、Ｄの配合量＝５〜３０(重量％)
（Ａ＋Ｄ）／（Ａ＋Ｂ＋Ｃ＋Ｄ）×１００＝６０〜８０
Ｂの配合量＝１０〜２０、Ｃの配合量＝１０〜２０(重量％)
（Ｂ＋Ｃ）／（Ａ＋Ｂ＋Ｃ＋Ｄ）×１００＝２０〜４０
なお、（Ａ＋Ｄ）はポリオールＡとＤの合計量であり、（Ｂ＋Ｃ）はポリオールＢとＣの合計量であり、（Ａ＋Ｂ＋Ｃ＋Ｄ）は、ポリオールの全体量である。
As the polyol used in the present invention, the following four types of polyols A to D having the hydroxyl value (OHV), the molecular weight (MW), the number of functional groups, and the ethylene oxide content (EO content) are used. The molecular weight of the polyol in the present invention is a weight average molecular weight.
A: Polyol having a hydroxyl value of 20 to 40 mgKOH / g, molecular weight of 4000 to 9000, functional group number of 3, and ethylene oxide content of 10 to 25% B: Hydroxyl value of 20 to 115 mgKOH / g, molecular weight of 1000 to 4000, functional group number of 2, ethylene oxide Polyol having a content of 5% or less C: Polyol having a hydroxyl value of 20 to 60 mgKOH / g, molecular weight of 2000 to 5000, functional group number 2, ethylene oxide content of 25 to 70% D: Hydroxyl value of 40 to 80 mgKOH / g, molecular weight of 2000 to 5000 Further, the polyol having 3 functional groups and an ethylene oxide content of 50 to 90% The blending amount (parts by weight) of the polyols A to D is as follows in a total amount of 100 parts by weight of all polyols. In the following formula, A represents the blending amount of polyol A, B represents the blending amount of polyol B, C represents the blending amount of polyol C, and D represents the blending amount of polyol D.
A blending amount = 40-65, D blending amount = 5-30 (% by weight)
(A + D) / (A + B + C + D) × 100 = 60-80
Blending amount of B = 10-20, blending amount of C = 10-20 (% by weight)
(B + C) / (A + B + C + D) × 100 = 20-40
(A + D) is the total amount of polyols A and D, (B + C) is the total amount of polyols B and C, and (A + B + C + D) is the total amount of polyol.
官能基数３のポリオールＡは４０重量部未満の場合、フォームセルが荒れて、フォーム形状をなさなくなり、一方、６５重量部を超える場合、高硬度になりフォームのソフト感が無くなってしまう。
官能基数３のポリオールＤは、５重量部未満の場合、高硬度になりフォームのソフト感が無くなり、一方、３０重量部を超える場合、フォームセルが荒れて、フォーム形状をなさなくなる。
官能基数２のポリオールＢは、１０重量部未満の場合、シュリンクしてフォームにならず、一方、２０重量部を超える場合、硬度がアップし、歪が悪くなってしまう。
官能基数２のポリオールＣは、１０重量部未満の場合、硬度がアップし、歪が悪くなり、一方、２０重量部を超える場合、シュリンクしてフォームにならない。
さらに、官能基数３のポリオールの量（Ａ＋Ｄ）が前記範囲未満である（すなわち官能基数２のポリオールの量（Ｂ＋Ｃ）が前記範囲を超える）とダウンしてフォームの体をなさなかったり、歪の悪いフォームになってしまい、逆に官能基数３のポリオールの量（Ａ＋Ｄ）が前記範囲を超える（すなわち官能基数２のポリオールの量（Ｂ＋Ｃ）が前記範囲未満）と高硬度になってソフト感がなくなってしまう。なお、前記ポリオールＡ〜Ｄは、何れもポリエーテルポリオールが好ましい。
When the polyol A having 3 functional groups is less than 40 parts by weight, the foam cell becomes rough and does not form a foam. On the other hand, when it exceeds 65 parts by weight, the hardness becomes high and the softness of the foam is lost.
When the polyol D having 3 functional groups is less than 5 parts by weight, the hardness becomes high and the soft feeling of the foam is lost. On the other hand, when it exceeds 30 parts by weight, the foam cell becomes rough and does not form a foam.
When the polyol B having 2 functional groups is less than 10 parts by weight, it does not shrink to form a foam. On the other hand, when it exceeds 20 parts by weight, the hardness increases and the distortion becomes worse.
When the polyol C having a functional group number of 2 is less than 10 parts by weight, the hardness is increased and the distortion is deteriorated.
Furthermore, if the amount of the polyol having 3 functional groups (A + D) is less than the above range (that is, the amount of the polyol having 2 functional groups (B + C) exceeds the above range), the foam may not be formed or the distortion may occur. On the contrary, if the amount of the polyol having 3 functional groups (A + D) exceeds the above range (that is, the amount of the polyol having 2 functional groups (B + C) is less than the above range), the hardness becomes high and soft feeling is felt. It will disappear. The polyols A to D are preferably polyether polyols.
前記４種類のポリオールＡ〜Ｄを前記の量で組み合わせることにより、ポリウレタンフォームを反発弾性（ＪＩＳ Ｋ ６４００−３準拠）５０％以上、２５％圧縮荷重（ＪＩＳ Ｋ ６４００−２ Ｄ法準拠）２０Ｎ以下にすることができる。なお、反発弾性（ＪＩＳ Ｋ ６４００−３準拠）のより好ましい範囲は５０〜７０％であり、２５％圧縮荷重（ＪＩＳ Ｋ ６４００−２ Ｄ法準拠）のより好ましい範囲は５〜２０Ｎである。 By combining the four types of polyols A to D in the above amounts, the polyurethane foam has a resilience (based on JIS K 6400-3) of 50% or more and a 25% compression load (based on JIS K 6400-2 D method) of 20 N or less. Can be. In addition, the more preferable range of impact resilience (based on JIS K 6400-3) is 50 to 70%, and the more preferable range of 25% compression load (based on JIS K 6400-2 D method) is 5 to 20N.
本発明において使用されるイソシアネートとしては、イソシアネート基を２以上有する化合物であれば、特に限定されるものではなく、ポリウレタンフォーム用のものが使用可能であり、１種類の単独でも２種類以上の併用であってもよい。前記イソシアネートとしては、芳香族系、脂肪族系、脂環族系のイソシアネート化合物、及びこれらの変性物を挙げることができる。 The isocyanate used in the present invention is not particularly limited as long as it is a compound having two or more isocyanate groups, and those for polyurethane foam can be used. One type can be used alone or two or more types can be used in combination. It may be. Examples of the isocyanate include aromatic, aliphatic, and alicyclic isocyanate compounds, and modified products thereof.
芳香族系イソシアネート化合物としては、ジフェニルメタンジイソシアネート（ＭＤＩ）、粗製ジフェニルメタンジイソシアネート、トリレンジイソシアネート（ＴＤＩ）、ナフタレンジイソシアネート（ＮＤＩ）、ｐ−フェニレンジイソシアネート（ＰＰＤＩ）、キシレンジイソシアネート（ＸＤＩ）、テトラメチルキシレンジイソジアネート（ＴＭＸＤＩ）、トリジンイソシアネート（ＴＯＤＩ）等が挙げられる。脂肪族系イソシアネート化合物としては、ヘキサメチレンジイソシアネート（ＨＤＩ）、リシンジイソシアネート（ＬＤＩ）、リシントリイソシアネート（ＬＴＩ）等が挙げられる。脂環族系イソシアネート化合物としては、イソホロンジイソシアネート（ＩＰＤＩ）、シクロヘキシルジイソシアネート（ＣＨＤＩ）、水添化ＸＤＩ（Ｈ６ＸＤＩ）、水添化ＭＤＩ（Ｈ１２ＭＤＩ）等が挙げられる。変性イソシアネート化合物としては、イソシアネート化合物のウレタン変性体、２量体、３量体、カルボジイミド変性体、アロファネート変性体、ビュレット変性体、ウレア変性体、イソシアヌレート変性体、オキサゾリドン変性体、イソシアネート基末端プレポリマー等が挙げられる。なお、環境規制の点からは、ＭＤＩ系及びその変性体のイソシアネートがより好ましい。 Examples of aromatic isocyanate compounds include diphenylmethane diisocyanate (MDI), crude diphenylmethane diisocyanate, tolylene diisocyanate (TDI), naphthalene diisocyanate (NDI), p-phenylene diisocyanate (PPDI), xylene diisocyanate (XDI), and tetramethylxylene diisosodium. Examples include dianate (TMXDI) and tolidine isocyanate (TODI). Examples of the aliphatic isocyanate compound include hexamethylene diisocyanate (HDI), lysine diisocyanate (LDI), and lysine triisocyanate (LTI). Examples of the alicyclic isocyanate compound include isophorone diisocyanate (IPDI), cyclohexyl diisocyanate (CHDI), hydrogenated XDI (H 6 XDI), hydrogenated MDI (H 12 MDI), and the like. Examples of the modified isocyanate compound include urethane-modified products, dimers, trimers, carbodiimide-modified products, allophanate-modified products, burette-modified products, urea-modified products, isocyanurate-modified products, oxazolidone-modified products, and isocyanate group-terminated prepolymers. Examples thereof include polymers. From the viewpoint of environmental regulations, MDI and its modified isocyanate are more preferable.
前記イソシアネートの配合量は、イソシアネートインデックスが７０〜１００となる量が好ましい。イソシアネートインデックスが７０未満の場合、歪（耐熱・湿熱）が悪化し、一方１００を超えるとフォームが高硬度になりソフト感が得られない。なお、イソシアネートインデックスは、ポリウレタンフォーム原料中の活性水素基（例えば、ポリオールの水酸基、発泡剤として用いられる水などの活性水素基）の合計に対するイソシアネートのイソシアネート基の当量比を百分率で示す値であり、ポリウレタフォームの分野で使用されている指標である。 The amount of the isocyanate blended is preferably such that the isocyanate index is 70-100. When the isocyanate index is less than 70, the distortion (heat resistance / wet heat) is deteriorated. On the other hand, when the isocyanate index exceeds 100, the foam has high hardness and a soft feeling cannot be obtained. The isocyanate index is a value indicating the equivalent ratio of the isocyanate group of the isocyanate to the total of the active hydrogen groups in the polyurethane foam raw material (for example, the active hydrogen group such as water used as a blowing agent). It is an indicator used in the field of polyureta foam.
本発明において使用される触媒としては、ポリオールとイソシアネートのウレタン化反応を促進するものであり、ポリウレタンフォーム用として用いられるアミン系触媒、金属触媒を挙げることができる。アミン系触媒としては、具体的には、Ｎ，Ｎ−ジメチルシクロヘキシルアミン、Ｎ，Ｎ−ジメチルベンジルアミン、Ｎ，Ｎ−ジメチルアミノエタノール、Ｎ,Ｎ´,Ｎ´−トリメチルアミノエチルピペラジン、トリエチレンジアミン等が用いられる。金属触媒としては、スタスオクトエートやジブチルチンジラウレート等の錫触媒やフェニル水銀プロピオン酸塩あるいはオクテン酸鉛等を挙げることができる。触媒の量は、ポリオール１００重量部に対して０．１〜０．７重量部程度である。 Examples of the catalyst used in the present invention are those that accelerate the urethanization reaction of polyol and isocyanate, and include amine-based catalysts and metal catalysts used for polyurethane foams. Specific examples of the amine catalyst include N, N-dimethylcyclohexylamine, N, N-dimethylbenzylamine, N, N-dimethylaminoethanol, N, N ′, N′-trimethylaminoethylpiperazine, and triethylenediamine. Etc. are used. Examples of the metal catalyst include tin catalysts such as stass octoate and dibutyltin dilaurate, phenylmercury propionate and lead octenoate. The amount of the catalyst is about 0.1 to 0.7 parts by weight with respect to 100 parts by weight of the polyol.
本発明において使用される発泡剤としては、水、炭化水素、ハロゲン系化合物等を挙げることができ、これらの中から１種類でもよく、又２種類以上でもよい。前記炭化水素としては、シクロペンタン、イソペンタン、ノルマルペンタン等を挙げることができる。又、前記ハロゲン系化合物としては、塩化メチレン、トリクロロフルオロメタン、ジクロロジフルオロメタン、ノナフルオロブチルメチルエーテル、ノナフルオロブチルエチルエーテル、ペンタフルオロエチルメチルエーテル、ヘプタフルオロイソプロピルメチルエーテル等を挙げることができる。これらの中でも発泡剤として水が特に好適である。前記発泡剤の配合量は、ポリオールを１００重量部に対して２．０〜３．０重量部程度が好ましい。 Examples of the foaming agent used in the present invention include water, hydrocarbons, halogen compounds, and the like, and one or more of them may be used. Examples of the hydrocarbon include cyclopentane, isopentane, and normal pentane. Examples of the halogen compound include methylene chloride, trichlorofluoromethane, dichlorodifluoromethane, nonafluorobutyl methyl ether, nonafluorobutyl ethyl ether, pentafluoroethyl methyl ether, heptafluoroisopropyl methyl ether and the like. Among these, water is particularly suitable as a foaming agent. The blending amount of the foaming agent is preferably about 2.0 to 3.0 parts by weight with respect to 100 parts by weight of polyol.
本発明において使用される整泡剤としては、ポリウレタンフォームに用いられるものであればよく、シリコーン系整泡剤、含フッ素化合物系整泡剤および公知の界面活性剤を挙げることができる。前記整泡剤の配合量は、ポリオールを１００重量部に対して０．４〜１．５重量部程度が好ましい。 The foam stabilizer used in the present invention is not particularly limited as long as it is used for polyurethane foams, and examples thereof include silicone foam stabilizers, fluorine-containing compound foam stabilizers, and known surfactants. The blending amount of the foam stabilizer is preferably about 0.4 to 1.5 parts by weight with respect to 100 parts by weight of polyol.
前記ポリウレタンフォーム原料には、その他の添加剤が適宜配合される。適宜配合される添加剤としては、難燃剤、着色剤、充填剤等を挙げることができる。 The polyurethane foam raw material is appropriately mixed with other additives. Examples of additives that are appropriately blended include flame retardants, colorants, fillers, and the like.
前記ポリウレタンフォームは、前記ポリオール、イソシアネート、触媒、発泡剤、整泡剤及び適宜の添加剤を含むポリウレタンフォーム原料を攪拌混合して反応させる公知の発泡方法によって製造することができる。発泡方法には、スラブ発泡とモールド発泡とがあり、何れの成形方法でもよい。スラブ発泡は、混合したポリウレタンフォーム原料をベルトコンベア上に吐出し、大気圧下、常温で発泡させる方法であり、一方、モールド発泡は、混合したフォーム原料をモールド（成形型）に充填してモールド内で発泡させる方法である。なお、前記ポリウレタンフォームは、寝具の種類に応じた形状、寸法等とされる。例えば、ベッド用クッションの場合には所定厚みの板状体等とされ、また枕用クッションの場合には、所定の枕形状とされる。さらに、枕用クッションの場合には、上下あるいは横方向等に貫通孔を形成して通気性を高めてもよい。 The polyurethane foam can be produced by a known foaming method in which a polyurethane foam raw material containing the polyol, isocyanate, catalyst, foaming agent, foam stabilizer and appropriate additive is stirred and mixed to react. Foaming methods include slab foaming and mold foaming, and any molding method may be used. Slab foaming is a method in which the mixed polyurethane foam raw material is discharged onto a belt conveyor and foamed at room temperature under atmospheric pressure. On the other hand, mold foaming is performed by filling the mold (molding die) with the mixed foam raw material. It is a method of foaming inside. In addition, the said polyurethane foam is made into the shape, dimension, etc. according to the kind of bedding. For example, in the case of a bed cushion, it is a plate-like body having a predetermined thickness, and in the case of a pillow cushion, it is a predetermined pillow shape. Furthermore, in the case of a pillow cushion, through holes may be formed in the vertical or horizontal direction to improve air permeability.
以下のポリオール、触媒、整泡剤、発泡剤及びイソシアネートを表１及び表２に示す量で調製したポリウレタンフォーム原料を混合撹拌し、寸法５００×３５０×８０ｍｍのキャビティを有する型に１１００ｇ充填し、発泡させることによりポリウレタンフォームを作成し、実施例及び比較例の寝具用クッションを得た。
A polyurethane foam raw material prepared by mixing the following polyol, catalyst, foam stabilizer, foaming agent and isocyanate in the amounts shown in Tables 1 and 2 is mixed and stirred, and 1100 g is filled in a mold having a cavity of
ポリオールＡ：官能基数３、分子量７０００、水酸基価２４ｍｇＫＯＨ／ｇ、エチレンオキサイド含有量１５％、品名；ＥＰ−９０１、三井化学（株）製
ポリオールＢ：官能基数２、分子量２０００、水酸基価５６ｍｇＫＯＨ／ｇ、エチレンオキサイド含有量０％、品名；Ｄ−２０００、三井化学（株）製
ポリオールＣ：官能基数２、分子量４０００、水酸基価２８ｍｇＫＯＨ／ｇ、エチレンオキサイド含有量５０％、品名；ポリオールＮｏ．３３、三洋化成工業（株）製
ポリオールＤ：官能基数３、分子量３４００、水酸基価５０ｍｇＫＯＨ／ｇ、エチレンオキサイド含有量８０％、品名；ＦＡ−１０３、三洋化成工業（株）製
ポリオールＥ：官能基数３、分子量５０００、水酸基価３６ｍｇＫＯＨ／ｇ、エチレンオキサイド含有量１８％、品名；ＦＡ−７０３、三洋化成工業（株）製
ポリオールＦ：官能基数３、分子量５０００、水酸基価２８ｍｇＫＯＨ／ｇ、エチレンオキサイド含有量１３％、グラフトポリオール、品名；ＦＡ−７２８Ｒ、三洋化成工業（株）製
ポリオールＧ：官能基数３、分子量６７０、水酸基価２５０ｍｇＫＯＨ／ｇ、エチレンオキサイド含有量０％、品名；Ｇ−７００、（株）アデカ製
ポリオールＨ：官能基数３、分子量１７００、水酸基価１００ｍｇＫＯＨ／ｇ、エチレンオキサイド含有量９０％、セルオープナー、品名；ＭＦ−１９Ｔ、三井化学（株）製
Polyol A: functional group number 3, molecular weight 7000, hydroxyl value 24 mgKOH / g, ethylene oxide content 15%, product name: EP-901, manufactured by Mitsui Chemicals, Inc. Polyol B: functional group number 2, molecular weight 2000, hydroxyl value 56 mgKOH / g Polyethylene C: functional group number 2, molecular weight 4000, hydroxyl value 28 mgKOH / g,
触媒：トリエチレンジアミン３３％、ジプロピレングリコール６７％、品名；ＤＡＢＣＯ３３ＬＶ、エアープロダクツジャパン製
整泡剤Ａ：シリコーン系整泡剤、品名；ＳＺ１３４６Ｅ、東レ・ダウコーニング社製
整泡剤Ｂ：シリコーン系整泡剤、品名；ＳＦ２９６９、東レ・ダウコーニング社製
発泡剤：水
イソシアネートＡ：ＭＤＩ、ＮＣＯ％＝２９．９％、品名；Ｓ−６５６４、ｈｕｎｔｓｍａｎ社製
イソシアネートＢ：ＭＤＩ、ＮＣＯ％＝４４．６％、品名；ＴＭ−８０２０、ＢＡＳＦ社製
Catalyst: Triethylenediamine 33%, dipropylene glycol 67%, product name: DABCO 33LV, manufactured by Air Products Japan Foam stabilizer A: Silicone foam stabilizer, product name: SZ1346E, manufactured by Toray Dow Corning Co., Ltd. Foaming agent, product name: SF2969, manufactured by Toray Dow Corning, Inc. Foaming agent: water Isocyanate A: MDI, NCO% = 29.9%, product name; S-6564, manufactured by Huntsman Isocyanate B: MDI, NCO% = 44.6 %, Product name: TM-8020, manufactured by BASF
このようにして得られた各実施例及び比較例の寝具用クッションに対して、密度（ｋｇ／ｍ３、ＪＩＳ Ｋ ７２２２：１９９９準拠）、２５％圧縮荷重（Ｎ、ＪＩＳ Ｋ ６４００−２ Ｄ法準拠）、反発弾性（％、ＪＩＳ Ｋ ６４００−３準拠）、通気性（Ｌ／ｍｉｎ、ＡＳＴＭ Ｄ ３５７４準拠）、５０℃、９５％ＲＨ、５０％圧縮の湿熱歪（％、ＪＩＳ Ｋ ６４００準拠）を測定し、また発泡後のポリウレタンフォームの形状を目視で判断した。測定結果及び判断結果を表１及び表２の下部に示す。なお、発泡後のポリウレタンフォームの形状については、シュリンク（収縮）及びボイド（中空部）が全く無い良好な外観の場合に◎、シュリンク（収縮）又はボイド（中空部）が僅かに存在する場合に○、シュリンクやボイドが顕著に見られる場合、あるいは発泡途中でダウンした場合には、成形不良と判断してその内容を記載した。また、シュリンクやボイドが著しかったもの、あるいはダウンしたものは、密度、２５％圧縮荷重、反発弾性及び通気性について正確に測定できないため、測定を行わなかった。 For the cushions for bedding of the examples and comparative examples thus obtained, density (kg / m 3 , JIS K 7222: 1999 compliant), 25% compression load (N, JIS K 6400-2 D method) Compliant), rebound resilience (%, JIS K 6400-3 compliant), breathability (L / min, ASTM D 3574 compliant), 50 ° C., 95% RH, 50% compression wet heat strain (%, JIS K 6400 compliant) The shape of the polyurethane foam after foaming was visually determined. The measurement results and judgment results are shown at the bottom of Tables 1 and 2. Regarding the shape of polyurethane foam after foaming, ◎ in the case of good appearance without any shrinkage (shrinkage) and voids (hollow part), when there is a slight amount of shrinkage (shrinkage) or voids (hollow part) ○, When shrinkage and voids are noticeable, or when it goes down during foaming, it is judged as a molding defect and the content is described. Moreover, since the shrinkage | contraction and the void were remarkable, or the thing which went down, since a density, a 25% compressive load, impact resilience, and air permeability cannot be measured correctly, it did not measure.
実施例１〜６の寝具用クッションは、２５％圧縮荷重が１１〜２０Ｎと低硬度であり、かつ反発弾性が５０〜６５％と高反発であった。さらに実施例１〜６の寝具用クッションは通気性が良好で湿熱歪が小さく、フォーム形状（成形状態）が良好であった。
一方、比較例１の寝具用クッションは、ポリオールがポリオールＡのみからなり、２５％圧縮荷重が５１Ｎと高硬度、かつ反発弾性が６５％と高反発であり、通気性が劣っていた。比較例２の寝具用クッションは、ポリオールがポリオールＡとポリオールＢのみからなり、２５％圧縮荷重が３５Ｎと中程度の硬度、かつ反発弾性が５３％と高反発であり、通気性及び湿熱歪が劣っていた。比較例３の寝具用クッションは、ポリオールがポリオールＥとポリオールＦのみからなり、２５％圧縮荷重が６０Ｎと高硬度、かつ反発弾性が６０％と高反発であり、通気性が劣っていた。比較例４の寝具用クッションは、ポリオールにＥ〜Ｈを使用したものであり、２５％圧縮荷重が１０Ｎと低硬度、かつ反発弾性が５％と低反発であり、通気性が劣っていた。
The cushions for beddings of Examples 1 to 6 had a low hardness of 25% compression load of 11 to 20 N and a high resilience of 50 to 65% rebound resilience. Furthermore, the bedding cushions of Examples 1 to 6 had good breathability, low wet heat distortion, and good foam shape (molded state).
On the other hand, in the cushion for bedding of Comparative Example 1, the polyol consisted only of polyol A, the 25% compression load was as high as 51 N, the rebound resilience was as high as 65%, and the air permeability was poor. In the cushion for bedding of Comparative Example 2, the polyol is composed of only polyol A and polyol B, the 25% compression load is 35N, the hardness is moderate, the rebound resilience is 53%, and the rebound resilience is high. It was inferior. In the cushion for bedding of Comparative Example 3, the polyol consisted only of polyol E and polyol F, the 25% compression load was as high as 60 N, the rebound resilience was as high as 60%, and the air permeability was poor. The cushion for bedding of Comparative Example 4 was obtained by using E to H as polyols, had a low hardness of 25% compression load of 10 N and a low resilience of 5%, and a poor air permeability.
比較例５は、ポリオールＡ〜Ｄを使用し、ポリオールＡを本発明の範囲よりも少にすると共にポリオールＤを本発明の範囲よりも多くしたものであり、ボイドが著しく、良好に発泡できなかった。比較例６の寝具用クッションは、ポリオールＡ〜Ｄを使用し、ポリオールＡを本発明の範囲よりも多くすると共にポリオールＤを本発明の範囲よりも少なくしたものであり、２５％圧縮荷重が３０Ｎと中程度の硬度、かつ反発弾性が５２％と高反発であり、通気性が劣っていた。比較例７の寝具用クッションは、ポリオールとしてポリオールＡ、Ｂ、Ｄの３種類使用したものであり、２５％圧縮荷重が３１Ｎと中程度の硬度、かつ反発弾性が４３％と中程度の反発であり、通気性及び湿熱歪が劣っていた。比較例８は、ポリオールとしてポリオールＡ、Ｃ、Ｄの３種類使用したものであり、シュリンクし、良好に発泡できなかった。比較例９は、ポリオールＡ〜Ｄを使用し、ポリオールＡを本発明の範囲よりも少にすると共にポリオールＢを本発明の範囲よりも多くしたものであり、発泡途中でダウンし、良好に発泡できなかった。比較例１０は、ポリオールＡ〜Ｄを使用し、ポリオールＡを本発明の範囲よりも少にすると共に、ポリオールＣを本発明の範囲よりも多くしたものであり、２５％圧縮荷重が１８Ｎと低硬度、かつ反発弾性が３８％と中程度の反発であり、通気性及び湿熱歪が劣っていた。比較例１１は、ポリオールとしてポリオールＥとポリオールＦを使用したものであり、比較例３のインデックスを下げたものであるが、２５％圧縮荷重が５０Ｎと高硬度のままであり、かつ反発弾性が５１％と高反発であり、通気性及び湿熱歪が劣っていた。 In Comparative Example 5, polyols A to D were used, polyol A was made smaller than the range of the present invention, and polyol D was made larger than the range of the present invention. It was. The cushion for bedding of Comparative Example 6 uses polyols A to D, polyol A is more than the range of the present invention and polyol D is less than the range of the present invention, and the 25% compression load is 30 N. Further, the hardness was moderate and the rebound resilience was as high as 52%, and the air permeability was poor. The cushion for bedding of Comparative Example 7 uses three types of polyols A, B, and D as polyols, and has a moderate hardness with a 25% compression load of 31 N and a moderate resilience of 43%. Yes, air permeability and wet heat distortion were poor. In Comparative Example 8, three types of polyols A, C, and D were used as polyols, which were shrunk and could not be foamed well. In Comparative Example 9, polyols A to D were used, polyol A was made smaller than the range of the present invention, and polyol B was made larger than the range of the present invention. could not. In Comparative Example 10, polyols A to D were used, polyol A was made smaller than the range of the present invention, polyol C was made larger than the range of the present invention, and the 25% compression load was as low as 18 N. Hardness and rebound resilience were 38% and moderate rebound, and air permeability and wet heat strain were inferior. Comparative Example 11 uses polyol E and polyol F as polyols, and has a lower index than that of Comparative Example 3. However, the 25% compression load remains as high as 50 N, and the resilience is low. The rebound was as high as 51%, and the air permeability and wet heat strain were inferior.
また、実施例１〜６及び比較例１〜４、比較例６、７、１０、１１の寝具用クッションを寸法５００×３５０×８０ｍｍの枕形状に作成し、寝具用クッションに頭を載置して使用感を判断した。その結果、全ての実施例は、頭を動かさない通常時における支持性及び適度な感触があり、また寝返りにより頭の向きを変えた際に、頭が上がる側ではクッション（ポリウレタンフォーム）が速やかに復元して反発弾性力により頭の回転を助け、一方、頭によって押される側ではクッション（ポリウレタンフォーム）が低硬度のため、容易に変形し、抵抗が少なかった。それに対して、ポリウレタンフォームの２５％圧縮荷重が高く、硬い比較例１〜３、６、７、１１は、枕の沈み込み感が少なく、頭の支持性に劣っていた。また、２５％圧縮荷重及び反発弾性の何れも低い従来の低硬度・低反発タイプの比較例４及び２５％圧縮荷重が低く、反発弾性が実施例よりも低い比較例１０については、頭の向きを変えた際に、頭が上がる側でクッション（ポリウレタンフォーム）の復元が遅く、クッションの復元反発力による助けが得られなかった。 Also, the bedding cushions of Examples 1 to 6 and Comparative Examples 1 to 4, and Comparative Examples 6, 7, 10, and 11 were made into pillows having dimensions of 500 × 350 × 80 mm, and the head was placed on the bedding cushion. The feeling of use was judged. As a result, all the examples have a support and a moderate feel in the normal state in which the head is not moved, and when the head is turned over by turning over, the cushion (polyurethane foam) is quickly put on the side where the head is raised. Restoration aided the rotation of the head by the rebound resilience, while the cushion (polyurethane foam) on the side pressed by the head was easily deformed due to its low hardness, and the resistance was low. On the other hand, polyurethane foams with high 25% compressive load and hard Comparative Examples 1 to 3, 6, 7, and 11 had less feeling of sinking the pillow and were inferior in head support. Further, in Comparative Example 4 of the conventional low hardness / low rebound type where both the 25% compressive load and the rebound resilience are low and in Comparative Example 10 where the 25% compressive load is low and the rebound resilience is lower than the Example, the orientation of the head When the head was changed, the cushion (polyurethane foam) was slowly restored on the side where the head was raised, and help from the restoring resilience of the cushion was not obtained.
また、実施例１と低硬度・低反発タイプの比較例４の寝具用クッションについて温度依存性を調べるため、−１０℃〜３０℃の範囲で２５％圧縮荷重（ＪＩＳ Ｋ ６４００−２ Ｄ法準拠）を測定し、２０℃に対する２５％圧縮荷重の比率を計算した。測定結果は図１に示す通りであり、実施例１では−１０℃〜３０℃の範囲で２５％圧縮荷重が殆ど変化がなかったのに対し、比較例４では、−１０℃の２５％圧縮荷重が２０℃の２５％圧縮荷重に対して約３２０％となった。このことから、実施例１では温度依存性が低く、冬季でも硬くならずに使用感が損なわれることがないのに対し、比較例４では温度依存性が高く、冬季では硬くなって使用感（蝕感）が損なわれることがわかる。 Moreover, in order to investigate temperature dependence about the cushion for bedding of Example 1 and the comparative example 4 of a low hardness and low resilience type, 25% compression load (compliant with JIS K 6400-2 D method) in the range of −10 ° C. to 30 ° C. ) And the ratio of 25% compressive load to 20 ° C. was calculated. The measurement results are as shown in FIG. 1. In Example 1, there was almost no change in the 25% compression load in the range of −10 ° C. to 30 ° C., whereas in Comparative Example 4, the 25% compression at −10 ° C. The load was about 320% for a 25% compression load of 20 ° C. From this, the temperature dependency in Example 1 is low and the feeling of use is not impaired without becoming hard even in winter, whereas the temperature dependency is high in Comparative Example 4 and it becomes hard in winter and feels good in use ( It can be seen that the texture is impaired.
また、実施例１と高硬度・高反発タイプの比較例３及び低硬度・低反発タイプの比較例４の寝具用クッションについて、使用時に頭部等と接触する部分における沈み込みによる頭部等の支持性を調べるため、荷重−たわみ試験（ＪＩＳ Ｋ ６４００−２ Ｂ法準拠）を行った。図２は測定結果を示す荷重−たわみ曲線であり、圧縮初期の圧縮荷重が、実施例１では小さいのに対して、比較例３及び比較例４では大きかった。このことから、実施例１では、使用時に頭部等と接触する部分が十分に沈み込んで頭部等に対する高い支持性が得られるのに対し、比較例３及び比較例４では、使用時に頭部等と接触する部分で抵抗があり、頭部等に対する支持性が実施例１よりも低いことがわかる。 Moreover, about the bedding cushion of the comparative example 3 of Example 1 and the high hardness / high repulsion type and the comparative example 4 of the low hardness / low repulsion type, the head and the like due to the sinking in the portion that comes into contact with the head etc. during use In order to investigate the supportability, a load-deflection test (based on JIS K 6400-2 B method) was performed. FIG. 2 is a load-deflection curve showing the measurement results. The compression load at the initial stage of compression was small in Example 1 but large in Comparative Examples 3 and 4. Therefore, in Example 1, the portion that comes into contact with the head or the like during use is sufficiently submerged to obtain high support for the head or the like, whereas in Comparative Example 3 and Comparative Example 4, the head is used during use. It can be seen that there is resistance at the part in contact with the part and the like, and the support for the head and the like is lower than that of Example 1.
また、実施例１と高硬度・高反発タイプの比較例３について、体圧分散性を調べるため、サイズ４００×４００×４０ｍｍにしたサンプルを布製の袋体に収納したものを、ボンネル上に敷いて頭部の体圧分散テストを行った。体圧分散テストは、「ビジュアルマット」（ニッタ株式会社製）装置を用い、頭部を実際に載置した際の圧力分布を調べた。
Further, for Example 1 and Comparative Example 3 of high hardness and high resilience type, in order to investigate body pressure dispersibility, a sample of a
テストの結果は、図３に示すように、高硬度・高反発タイプの比較例３については高い圧力を示す赤色の部分が多いのに対し、実施例１では高い圧力を示す赤色の部分が少なく、頭部の体圧が良好に分散されているのがわかる。 As a result of the test, as shown in FIG. 3, the high hardness / high repulsion type comparative example 3 has many red portions showing high pressure, whereas Example 1 has few red portions showing high pressure. It can be seen that the body pressure of the head is well distributed.
このように、本発明によれば、寝返りがし易く、かつ体圧分散性が良く、構造が簡単で安価な寝具用クッションを得ることができる。なお、本発明の寝具用クッションは枕用に限られず、ベッド用であってもよい。 As described above, according to the present invention, it is possible to obtain a cushion for bedding that is easy to turn over, has good body pressure dispersibility, has a simple structure, and is inexpensive. The bedding cushion of the present invention is not limited to pillows, but may be for beds.
Claims (2)
前記ポリオールが以下のＡ〜Ｄの４種類からなり、
Ａ：水酸基価２０〜４０ｍｇＫＯＨ／ｇ、分子量４０００〜９０００、官能基数３、
エチレンオキサイド含有量１０〜２５％のポリオール
Ｂ：水酸基価２０〜１１５ｍｇＫＯＨ／ｇ、分子量１０００〜４０００、官能基数２、
エチレンオキサイド含有量５％以下のポリオール
Ｃ：水酸基価２０〜６０ｍｇＫＯＨ／ｇ、分子量２０００〜５０００、官能基数２、
エチレンオキサイド含有量２５〜７０％のポリオール
Ｄ：水酸基価４０〜８０ｍｇＫＯＨ／ｇ、分子量２０００〜５０００、官能基数３、
エチレンオキサイド含有量５０〜９０％のポリオール
Ａの配合量（重量部）が４０〜６５であり、
前記軟質ポリウレタンフォームは、反発弾性（ＪＩＳ Ｋ ６４００−３準拠）が５０％以上、２５％圧縮荷重（ＪＩＳ Ｋ ６４００−２ Ｄ法準拠）が２０Ｎ以下であることを特徴とする寝具用クッション。 In a cushion for bedding comprising a flexible polyurethane foam obtained by foaming a polyurethane foam raw material containing a polyol, an isocyanate, a catalyst, a foaming agent and a foam stabilizer,
The polyol consists of the following four types A to D,
A: hydroxyl value 20-40 mgKOH / g, molecular weight 4000-9000, functional group number 3,
Polyol with ethylene oxide content of 10-25%
B: Hydroxyl value 20-115 mgKOH / g, molecular weight 1000-4000, number of functional groups 2,
Polyol with an ethylene oxide content of 5% or less
C: hydroxyl value 20-60 mgKOH / g, molecular weight 2000-5000, functional group number 2,
Polyol with an ethylene oxide content of 25-70%
D: hydroxyl value 40-80 mgKOH / g, molecular weight 2000-5000, functional group number 3,
Polyol with ethylene oxide content of 50-90%
The blending amount (parts by weight) of A is 40 to 65,
The soft polyurethane foam has a rebound resilience (based on JIS K 6400-3) of 50% or more and a 25% compressive load (based on JIS K 6400-2 D method) of 20 N or less.
Ａの配合量＝４０〜６５、Ｄの配合量＝５〜３０
（Ａ＋Ｄ）／（Ａ＋Ｂ＋Ｃ＋Ｄ）×１００＝６０〜８０(重量％)
Ｂの配合量＝１０〜２０、Ｃの配合量＝１０〜２０
（Ｂ＋Ｃ）／（Ａ＋Ｂ＋Ｃ＋Ｄ）×１００＝２０〜４０(重量％)
を満たすことを特徴とする請求項１に記載の寝具用クッション。 The blending amount (parts by weight) of A to D is
A blending amount = 40 to 65, D blending amount = 5 to 30
(A + D) / (A + B + C + D) × 100 = 60-80 (% by weight)
Blending amount of B = 10-20, blending amount of C = 10-20
(B + C) / (A + B + C + D) × 100 = 20-40 (% by weight)
The bedding cushion according to claim 1, wherein:
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