JP6458058B2 - センサ付きクッション材およびベッド - Google Patents
センサ付きクッション材およびベッド Download PDFInfo
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- JP6458058B2 JP6458058B2 JP2016573440A JP2016573440A JP6458058B2 JP 6458058 B2 JP6458058 B2 JP 6458058B2 JP 2016573440 A JP2016573440 A JP 2016573440A JP 2016573440 A JP2016573440 A JP 2016573440A JP 6458058 B2 JP6458058 B2 JP 6458058B2
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- Prior art keywords
- resin sheet
- resin
- sensor
- photoelastic
- group
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- 125000003187 heptyl group Chemical group [H]C([*])([H])C([H])([H])C([H])([H])C([H])([H])C([H])([H])C([H])([H])C([H])([H])[H] 0.000 description 1
- 125000006038 hexenyl group Chemical group 0.000 description 1
- 125000004051 hexyl group Chemical group [H]C([H])([H])C([H])([H])C([H])([H])C([H])([H])C([H])([H])C([H])([H])* 0.000 description 1
- 230000007062 hydrolysis Effects 0.000 description 1
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- 239000002608 ionic liquid Substances 0.000 description 1
- 125000000959 isobutyl group Chemical group [H]C([H])([H])C([H])(C([H])([H])[H])C([H])([H])* 0.000 description 1
- XJRAOMZCVTUHFI-UHFFFAOYSA-N isocyanic acid;methane Chemical compound C.N=C=O.N=C=O XJRAOMZCVTUHFI-UHFFFAOYSA-N 0.000 description 1
- 125000001972 isopentyl group Chemical group [H]C([H])([H])C([H])(C([H])([H])[H])C([H])([H])C([H])([H])* 0.000 description 1
- 125000001449 isopropyl group Chemical group [H]C([H])([H])C([H])(*)C([H])([H])[H] 0.000 description 1
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- VZCYOOQTPOCHFL-UPHRSURJSA-N maleic acid Chemical compound OC(=O)\C=C/C(O)=O VZCYOOQTPOCHFL-UPHRSURJSA-N 0.000 description 1
- 239000011976 maleic acid Substances 0.000 description 1
- FPYJFEHAWHCUMM-UHFFFAOYSA-N maleic anhydride Chemical compound O=C1OC(=O)C=C1 FPYJFEHAWHCUMM-UHFFFAOYSA-N 0.000 description 1
- 239000000594 mannitol Substances 0.000 description 1
- 235000010355 mannitol Nutrition 0.000 description 1
- 239000006224 matting agent Substances 0.000 description 1
- 235000012054 meals Nutrition 0.000 description 1
- 230000007246 mechanism Effects 0.000 description 1
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- LVHBHZANLOWSRM-UHFFFAOYSA-N methylenebutanedioic acid Natural products OC(=O)CC(=C)C(O)=O LVHBHZANLOWSRM-UHFFFAOYSA-N 0.000 description 1
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- XGFDHKJUZCCPKQ-UHFFFAOYSA-N n-nonadecyl alcohol Natural products CCCCCCCCCCCCCCCCCCCO XGFDHKJUZCCPKQ-UHFFFAOYSA-N 0.000 description 1
- 125000005187 nonenyl group Chemical group C(=CCCCCCCC)* 0.000 description 1
- 125000001400 nonyl group Chemical group [H]C([*])([H])C([H])([H])C([H])([H])C([H])([H])C([H])([H])C([H])([H])C([H])([H])C([H])([H])C([H])([H])[H] 0.000 description 1
- 125000004365 octenyl group Chemical group C(=CCCCCCC)* 0.000 description 1
- 125000002347 octyl group Chemical group [H]C([*])([H])C([H])([H])C([H])([H])C([H])([H])C([H])([H])C([H])([H])C([H])([H])C([H])([H])[H] 0.000 description 1
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- OXQKEKGBFMQTML-BIVRFLNRSA-N perseitol Chemical compound OC[C@H](O)[C@@H](O)[C@@H](O)[C@H](O)[C@H](O)CO OXQKEKGBFMQTML-BIVRFLNRSA-N 0.000 description 1
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- WBHHMMIMDMUBKC-XLNAKTSKSA-N ricinelaidic acid Chemical compound CCCCCC[C@@H](O)C\C=C\CCCCCCCC(O)=O WBHHMMIMDMUBKC-XLNAKTSKSA-N 0.000 description 1
- 229960003656 ricinoleic acid Drugs 0.000 description 1
- FEUQNCSVHBHROZ-UHFFFAOYSA-N ricinoleic acid Natural products CCCCCCC(O[Si](C)(C)C)CC=CCCCCCCCC(=O)OC FEUQNCSVHBHROZ-UHFFFAOYSA-N 0.000 description 1
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- CDAISMWEOUEBRE-UHFFFAOYSA-N scyllo-inosotol Natural products OC1C(O)C(O)C(O)C(O)C1O CDAISMWEOUEBRE-UHFFFAOYSA-N 0.000 description 1
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- 125000000999 tert-butyl group Chemical group [H]C([H])([H])C(*)(C([H])([H])[H])C([H])([H])[H] 0.000 description 1
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- 125000000383 tetramethylene group Chemical group [H]C([H])([*:1])C([H])([H])C([H])([H])C([H])([H])[*:2] 0.000 description 1
- 239000002562 thickening agent Substances 0.000 description 1
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- 229910052719 titanium Inorganic materials 0.000 description 1
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- RUELTTOHQODFPA-UHFFFAOYSA-N toluene 2,6-diisocyanate Chemical compound CC1=C(N=C=O)C=CC=C1N=C=O RUELTTOHQODFPA-UHFFFAOYSA-N 0.000 description 1
- SRPWOOOHEPICQU-UHFFFAOYSA-N trimellitic anhydride Chemical compound OC(=O)C1=CC=C2C(=O)OC(=O)C2=C1 SRPWOOOHEPICQU-UHFFFAOYSA-N 0.000 description 1
- PYGKDFLMCGZPHX-UHFFFAOYSA-N tris(oxiran-2-ylmethyl) phosphate Chemical compound C1OC1COP(OCC1OC1)(=O)OCC1CO1 PYGKDFLMCGZPHX-UHFFFAOYSA-N 0.000 description 1
- WFKWXMTUELFFGS-UHFFFAOYSA-N tungsten Chemical compound [W] WFKWXMTUELFFGS-UHFFFAOYSA-N 0.000 description 1
- 229910052721 tungsten Inorganic materials 0.000 description 1
- 239000010937 tungsten Substances 0.000 description 1
- 230000007306 turnover Effects 0.000 description 1
- KJIOQYGWTQBHNH-UHFFFAOYSA-N undecanol Chemical compound CCCCCCCCCCCO KJIOQYGWTQBHNH-UHFFFAOYSA-N 0.000 description 1
- 150000004670 unsaturated fatty acids Chemical class 0.000 description 1
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- 239000000811 xylitol Substances 0.000 description 1
- HEBKCHPVOIAQTA-SCDXWVJYSA-N xylitol Chemical compound OC[C@H](O)[C@@H](O)[C@H](O)CO HEBKCHPVOIAQTA-SCDXWVJYSA-N 0.000 description 1
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- PAPBSGBWRJIAAV-UHFFFAOYSA-N ε-Caprolactone Chemical compound O=C1CCCCCO1 PAPBSGBWRJIAAV-UHFFFAOYSA-N 0.000 description 1
Images
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Description
(−CO−R5−COO−R6−O−)n (A)
(式中、R5およびR6はそれぞれ2価の炭化水素基であり、nは平均1より大きい数を示す。)で表されるものが含まれる。
高分子量ポリオールの数平均分子量は、例えば、225〜20,000、好ましくは、500〜15,000である。
高分子量ポリオールの平均官能基数が上記した範囲を超過すると、ポリウレタン樹脂(成形体、樹脂シート)において、所望の光弾性定数を得にくい場合がある。一方、平均官能基数が上記した範囲未満であると、ヤング率が低くなり過ぎ、加工性や耐傷付き性が低下する場合がある。
下記式(2)で示されるエーテル化合物、
下記式(3)で示されるシクロヘキシル化合物、
下記式(4)で示されるフェニルエステル化合物が挙げられる。
上記式(1)中、R1として示される炭素数1〜11のアルキル基としては、例えば、メチル、エチル、プロピル、イソプロピル、ブチル、イソブチル、tert−ブチル、ペンチル、イソペンチル、tert−ペンチル、ヘキシル、ヘプチル、オクチル、ノニル、イソノニル、デシル、ドデシルなどの直鎖または分岐のアルキル基が挙げられる。好ましくは、炭素数2〜7のアルキル基が挙げられる。
従って、光弾性樹脂の光弾性定数を上記した所望の範囲に設定するには、歪光学定数およびヤング率を調整する。
ガラス製フラスコにポリテトラメチレンエーテルグリコール(保土谷化学、PTG−650SN、水酸基価174.9mgKOH/g)100質量部、酸化防止剤1質量部を仕込み、減圧下、120℃で2時間乾燥し、窒素で常圧に戻した。次いで、撹拌しながら1,3−プロパンジオール2.25質量部、および、1,2,6−ヘキサントリオール0.6875質量部を加え、温度を70℃に加温した。次いで、消泡剤を数滴加え、70℃で溶解した4,4′−ジフェニルメタンジイソシアネート(三井化学、MDI−PH)48.75質量部を投入し、撹拌混合した。その後、減圧下で30秒間脱泡し、窒素で常圧に戻した後、フラスコから成形型に流し込み、70℃で18時間硬化させることにより、ポリウレタン樹脂からなる厚さ2mmの樹脂シート(成形体)1を得た。
ガラス製フラスコにポリテトラメチレンエーテルグリコール(保土谷化学、PTG−650SN、水酸基価174.9mgKOH/g)100質量部、酸化防止剤1質量部を仕込み、減圧下、120℃で2時間乾燥し、窒素で常圧に戻した。次いで、撹拌しながら1,3−プロパンジオール2.29質量部、および、1,2,6−ヘキサントリオール0.7質量部を加え温度を70℃に加温した。次いで、消泡剤を数滴加え、70℃で溶解した4,4′−ジフェニルメタンジイソシアネート(三井化学、MDI−PH)50.85質量部、および、4−シアノ−4’−ペンチルビフェニル(5CB)10質量部を投入し、撹拌混合した。その後、減圧下で30秒間脱泡し、窒素で常圧に戻した後、フラスコから成形型に流し込み、70℃で18時間硬化させることにより、ポリウレタン樹脂からなる厚さ2mmの樹脂シート(成形体)2を得た。
ガラス製フラスコにポリテトラメチレンエーテルグリコール(保土谷化学、PTG−650SN、水酸基価174.9mgKOH/g)100質量部、酸化防止剤1質量部を仕込み、減圧下、120℃で2時間乾燥し、窒素で常圧に戻した。次いで、1,2,6−ヘキサントリオール0.7質量部を加え、温度を70℃に加温した。次いで、消泡剤を数滴加え、70℃で溶解した4,4′−ジフェニルメタンジイソシアネート(三井化学、MDI−PH)43質量部、および、4−ペンチルビフェニル10質量部を投入し、撹拌混合した。その後、減圧下で30秒間脱泡し、窒素で常圧に戻した後、フラスコから成形型に流し込み、70℃で18時間硬化させることにより、ポリウレタン樹脂からなる厚さ2mmの樹脂シート(成形体)3を得た。
ガラス製フラスコにポリカーボネートジオール(ダイセル、プラクセルCD205PL、水酸基価224.7mgKOH/g)100質量部、酸化防止剤1質量部を仕込み、減圧下、120℃で2時間乾燥し、窒素で常圧に戻した。次いで、1,2,6−ヘキサントリオール0.888質量部を加え温度を70℃に加温した。次いで、消泡剤を数滴加え、70℃で溶解した4,4′−ジフェニルメタンジイソシアネート(三井化学、MDI−PH)55.25質量部、4−シアノ−4’−ペンチルビフェニル(5CB)13.6質量部を投入し、撹拌混合した。その後、減圧下で30秒間脱泡し、窒素で常圧に戻した後、フラスコから成形型に流し込み、70℃で18時間硬化させることにより、ポリウレタン樹脂からなる厚さ2mmの樹脂シート(成形体)4を得た。
(5−1)ポリウレタンポリオール(水酸基末端プレポリマー)およびポリオール混合物の合成
ガラス製フラスコにポリテトラメチレンエーテルグリコール(保土谷化学、PTG−650SN、水酸基価164.8mgKOH/g)100質量部、酸化防止剤1質量部を仕込み、減圧下、120℃で2時間乾燥し、窒素で常圧に戻した。次いで、温度を80℃に加温し、撹拌しながら3,3′−ジメチルビフェニル−4,4′−ジイソシアネート(日曹商事、TODI)14質量部を投入し、3時間反応させ、IRの測定よりNCO基の吸収スペクトルが消失したことを確認した。
(5−2)硬化反応
上記(5−1)のポリオール混合物を70℃に加温し、消泡剤を数滴加え、70で溶解した4,4′−ジフェニルメタンジイソシアネート(三井化学、MDI−PH)49.8質量部を投入し、撹拌混合する。減圧下で30秒間脱泡し、窒素で常圧に戻した後、フラスコから成形型に流し込み、70℃で18時間硬化させることにより、ポリウレタン樹脂からなる厚さ2mmの樹脂シート(成形体)5を得た。
(6−1)イソシアネート基末端プレポリマーの合成
ガラス製フラスコにポリテトラメチレンエーテルグリコール(保土谷化学、PTG−650SN、水酸基価164.8mgKOH/g)100質量部、酸化防止剤0.2質量部を仕込み、減圧下、120℃で2時間乾燥し、窒素で常圧に戻した。次いで、温度を80℃に加温し、撹拌しながら3,3′−ジメチルビフェニル−4,4′−ジイソシアネート(日曹商事、TODI)18.3質量部と、4,4′−ジフェニルメタンジイソシアネート(三井化学、MDI−PH)67.7質量部を投入し、3時間反応させ、イソシアネート基末端プレポリマーを得た。得られたイソシアネート基末端プレポリマーのイソシアネートインデックスは231であった。
(6−2)硬化反応
上記(6−1)のイソシアネート基末端プレポリマーを70℃に加温した。また、別のフラスコで、予め乾燥させておいたポリテトラメチレンエーテルグリコール(保土谷化学、PTG−650SN、水酸基価164.8)42.9質量部に、3−メチル−1,5−ペンタンジオール6.55質量部、トリメチロールプロパン−エチレンオキシド付加物(三井化学、IR−94、水酸基価920)7.15質量部、および、2−エチル−1−ヘキサノール2.32質量部を加え、よく撹拌混合し、70℃に加温した。
<光弾性定数およびヤング率>
「築地光雄、高和宏行、田實佳郎著“光学フィルム用・光弾性定数測定システムの開発”、精密学会誌73、253−258(2007)」の「光弾性定数測定方法」の記載に準拠して測定し、25℃における歪み光学定数およびヤング率を得るとともに、それらから25℃における光弾性定数を算出した。上記測定には、波長630nmのレーザー光を使用した。
動的粘弾性測定装置(VES−F−III、VISCO−ELASTICSPECTROMETER、岩本製作所社製)を用いて、長さ2.5cm、幅5.0mm、厚み2.0mmの短冊状に裁断したサンプル片を、昇温速度5℃/分、振動数10Hz、振幅±0.01mmの温度分散モードにて測定し、貯蔵伸長弾性率(E’)、損失伸長弾性率(E’’)および損失正接(tanδ)を求めるとともに、得られたデータの損失正接(tanδ)のピーク値の温度を、ガラス転移温度とした。
参考例4で得られた成形体4(ガラス転移温度:25℃)の20℃、35℃、40℃での光弾性定数を測定した。その結果を、表2に示す。
20℃から40℃までの温度上昇で、光弾性定数の低下が約18%であり、この程度の光弾性定数の変化であれば、計測には大きな影響はないものと考えられる。
参考例1に準じて、樹脂シート7〜11を製造した。また、得られた樹脂シートの光弾性定数(25℃)、ヤング率(25℃)、ガラス転移温度を測定した。
参考例1に準じて、樹脂シート12〜14を製造した。また、得られた樹脂シートの光弾性定数(25℃)、ヤング率(25℃)、ガラス転移温度を測定した。
参考例1に準じて、樹脂シート15〜17を製造した。また、得られた樹脂シートの光弾性定数(25℃)、ヤング率(25℃)、ガラス転移温度を測定した。
<光弾性定数およびヤング率>
「築地光雄、高和宏行、田實佳郎著“光学フィルム用・光弾性定数測定システムの開発”、精密学会誌73、253−258(2007)」の「光弾性定数測定方法」の記載に準拠して測定し、25℃における歪み光学定数およびヤング率を得るとともに、それらから25℃における光弾性定数を算出した。上記測定には、波長630nmのレーザー光を使用した。
動的粘弾性測定装置(VES−F−III、VISCO−ELASTICSPECTROMETER、岩本製作所社製)を用いて、長さ2.5cm、幅5.0mm、厚み2.0mmの短冊状に裁断したサンプル片を、昇温速度5℃/分、振動数10Hz、振幅±0.01mmの温度分散モードにて測定し、貯蔵伸長弾性率(E’)、損失伸長弾性率(E’’)および損失正接(tanδ)を求めるとともに、得られたデータの損失正接(tanδ)のピーク値の温度を、ガラス転移温度とした。
<荷重試験>
検知方法1を採用し、厚さ2mm、縦横5cmの樹脂シートの端面中央部分から、赤色レーザー光線(波長650nm)をシート内に照射し、シートの中央(レーザー光線の光路上)に重さ10gの分を載せて複屈折を生じさせ、検光子通過後に検出された光の強度を、「光強度」とした。
<寝心地>
樹脂シートをクッション材(材質:軟質ウレタンフォーム、厚み:20cm)に積層し、樹脂シート上に横臥した際の寝心地について、下記の基準で評価した。
◎:極めて良好
○:良好
△:やや硬い
PTG−1000SN:商品名PTG−1000SN、ポリテトラメチレンエーテルグリコール、保土谷化学社製、水酸基価111.5mgKOH/g
PTG−650SN:商品名PTG−650SN、ポリテトラメチレンエーテルグリコール、保土谷化学社製、水酸基価174.9mgKOH/g
(考察)
参考例7と参考実施例8〜17を比較すると、樹脂のTgが−25℃以下の場合には半値幅が3.2度以下であり、検出光が広がり難いため、荷重の検出感度がより良好であることが分かる。
Claims (11)
- 光弾性樹脂からなる樹脂シートと、
前記樹脂シートに積層されるクッション材と、
発光部、および、前記発光部から発せられた光が前記樹脂シートを介して受光される受光部を備える光センサと、
前記光センサにより検知された光信号に基づいて、前記樹脂シートにかかる応力を検知する処理部と
を備え、
前記光弾性樹脂のガラス転移温度が、−25℃以下である
ことを特徴とする、センサ付きクッション材。 - 前記発光部および前記受光部が、前記樹脂シートの厚み方向と直交する方向に投影した投影面において前記樹脂シートと重複するように配置されることを特徴とする、請求項1に記載のセンサ付きクッション材。
- 前記発光部が、前記樹脂シートの厚み方向と直交する方向に投影した投影面において前記樹脂シートと重複するように配置され、
前記受光部が、前記樹脂シートの厚み方向に投影した投影面において、前記樹脂シートと重複するように配置される
ことを特徴とする、請求項1に記載のセンサ付きクッション材。 - 前記クッション材が、前記受光部を収容するための凸状の収容部を有していることを特徴とする、請求項3に記載のセンサ付きクッション材。
- 前記光弾性樹脂の25℃における光弾性定数が、1000×10−12Pa−1以上100000×10−12Pa−1以下であることを特徴とする、請求項1に記載のセンサ付きクッション材。
- 前記光弾性樹脂のガラス転移温度が、−60℃以上であることを特徴とする、請求項1に記載のセンサ付きクッション材。
- 前記光弾性樹脂の25℃におけるヤング率が、2MPa以上5MPa以下であることを特徴とする、請求項1に記載のセンサ付きクッション材。
- 前記光弾性樹脂が、ポリウレタン樹脂であることを特徴とする、請求項1に記載のセンサ付きクッション材。
- 前記光弾性樹脂が、
ポリイソシアネート成分と活性水素基含有成分とを含有するポリウレタン樹脂組成物からなり、
前記ポリイソシアネート成分は、1,4−フェニレン基(但し、1,4−フェニレン基における一部の水素原子が、メチル基および/またはメトキシ基で置換されていてもよい。)、および/または、1,5−ナフチレン基を有する芳香環含有ポリイソシアネートを含有し、
前記活性水素基含有成分は、平均水酸基価が20〜500mgKOH/gである高分子量ポリオールを含有することを特徴とする、請求項1に記載のセンサ付きクッション材。 - 前記活性水素基含有成分が、さらに、モノオールを含有することを特徴とする、請求項9に記載のセンサ付きクッション材。
- 請求項1に記載のセンサ付きクッション材を備えることを特徴とする、ベッド。
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US11246545B2 (en) | 2017-10-20 | 2022-02-15 | Siemens Medical Solutions Usa, Inc. | Patient bed electronic ruler |
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