JP5941675B2 - 皮革様シート - Google Patents
皮革様シート Download PDFInfo
- Publication number
- JP5941675B2 JP5941675B2 JP2011290034A JP2011290034A JP5941675B2 JP 5941675 B2 JP5941675 B2 JP 5941675B2 JP 2011290034 A JP2011290034 A JP 2011290034A JP 2011290034 A JP2011290034 A JP 2011290034A JP 5941675 B2 JP5941675 B2 JP 5941675B2
- Authority
- JP
- Japan
- Prior art keywords
- leather
- sheet
- nonwoven fabric
- acrylic resin
- entangled nonwoven
- 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.)
- Expired - Fee Related
Links
- 239000000835 fiber Substances 0.000 claims description 78
- 229920000178 Acrylic resin Polymers 0.000 claims description 48
- 239000004925 Acrylic resin Substances 0.000 claims description 48
- 239000004745 nonwoven fabric Substances 0.000 claims description 46
- 239000006185 dispersion Substances 0.000 claims description 44
- 229920003051 synthetic elastomer Polymers 0.000 claims description 40
- 239000005061 synthetic rubber Substances 0.000 claims description 40
- 239000003795 chemical substances by application Substances 0.000 claims description 35
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims description 24
- 229920005989 resin Polymers 0.000 claims description 20
- 239000011347 resin Substances 0.000 claims description 20
- 229920001971 elastomer Polymers 0.000 claims description 16
- 239000004372 Polyvinyl alcohol Substances 0.000 claims description 15
- 229920002451 polyvinyl alcohol Polymers 0.000 claims description 15
- 239000005060 rubber Substances 0.000 claims description 14
- 238000004519 manufacturing process Methods 0.000 claims description 10
- 239000003921 oil Substances 0.000 claims description 10
- 235000019198 oils Nutrition 0.000 claims description 10
- JRZJOMJEPLMPRA-UHFFFAOYSA-N olefin Natural products CCCCCCCC=C JRZJOMJEPLMPRA-UHFFFAOYSA-N 0.000 claims description 8
- 150000001336 alkenes Chemical group 0.000 claims description 7
- 239000000839 emulsion Substances 0.000 claims description 7
- 229920000459 Nitrile rubber Polymers 0.000 claims description 6
- 238000001035 drying Methods 0.000 claims description 5
- 239000010775 animal oil Substances 0.000 claims description 4
- 229920002635 polyurethane Polymers 0.000 claims description 4
- 239000004814 polyurethane Substances 0.000 claims description 4
- 235000015112 vegetable and seed oil Nutrition 0.000 claims description 4
- 239000008158 vegetable oil Substances 0.000 claims description 4
- 229920000642 polymer Polymers 0.000 description 51
- 238000004049 embossing Methods 0.000 description 41
- -1 2-ethylhexyl Chemical group 0.000 description 22
- NIXOWILDQLNWCW-UHFFFAOYSA-M Acrylate Chemical compound [O-]C(=O)C=C NIXOWILDQLNWCW-UHFFFAOYSA-M 0.000 description 21
- 238000000034 method Methods 0.000 description 19
- 229920001410 Microfiber Polymers 0.000 description 16
- 238000002844 melting Methods 0.000 description 13
- 230000008018 melting Effects 0.000 description 13
- 239000003960 organic solvent Substances 0.000 description 13
- LYCAIKOWRPUZTN-UHFFFAOYSA-N Ethylene glycol Chemical compound OCCO LYCAIKOWRPUZTN-UHFFFAOYSA-N 0.000 description 11
- 239000000243 solution Substances 0.000 description 11
- 239000000178 monomer Substances 0.000 description 10
- 239000007787 solid Substances 0.000 description 10
- CERQOIWHTDAKMF-UHFFFAOYSA-N Methacrylic acid Chemical class CC(=C)C(O)=O CERQOIWHTDAKMF-UHFFFAOYSA-N 0.000 description 9
- 229920005862 polyol Polymers 0.000 description 9
- 150000003077 polyols Chemical class 0.000 description 8
- 229920005749 polyurethane resin Polymers 0.000 description 8
- 239000000047 product Substances 0.000 description 8
- 150000001875 compounds Chemical class 0.000 description 7
- 229920001577 copolymer Polymers 0.000 description 7
- 150000002009 diols Chemical class 0.000 description 7
- 238000009987 spinning Methods 0.000 description 7
- HRPVXLWXLXDGHG-UHFFFAOYSA-N Acrylamide Chemical compound NC(=O)C=C HRPVXLWXLXDGHG-UHFFFAOYSA-N 0.000 description 6
- NLHHRLWOUZZQLW-UHFFFAOYSA-N Acrylonitrile Chemical compound C=CC#N NLHHRLWOUZZQLW-UHFFFAOYSA-N 0.000 description 6
- ZMXDDKWLCZADIW-UHFFFAOYSA-N N,N-Dimethylformamide Chemical compound CN(C)C=O ZMXDDKWLCZADIW-UHFFFAOYSA-N 0.000 description 6
- 239000002904 solvent Substances 0.000 description 6
- 239000002344 surface layer Substances 0.000 description 6
- KAKZBPTYRLMSJV-UHFFFAOYSA-N Butadiene Chemical class C=CC=C KAKZBPTYRLMSJV-UHFFFAOYSA-N 0.000 description 5
- LFQSCWFLJHTTHZ-UHFFFAOYSA-N Ethanol Chemical compound CCO LFQSCWFLJHTTHZ-UHFFFAOYSA-N 0.000 description 5
- 239000010985 leather Substances 0.000 description 5
- 150000002825 nitriles Chemical class 0.000 description 5
- 238000004080 punching Methods 0.000 description 5
- 239000000126 substance Substances 0.000 description 5
- 239000004711 α-olefin Substances 0.000 description 5
- SOGAXMICEFXMKE-UHFFFAOYSA-N Butylmethacrylate Chemical compound CCCCOC(=O)C(C)=C SOGAXMICEFXMKE-UHFFFAOYSA-N 0.000 description 4
- VZCYOOQTPOCHFL-OWOJBTEDSA-N Fumaric acid Chemical compound OC(=O)\C=C\C(O)=O VZCYOOQTPOCHFL-OWOJBTEDSA-N 0.000 description 4
- OAKJQQAXSVQMHS-UHFFFAOYSA-N Hydrazine Chemical compound NN OAKJQQAXSVQMHS-UHFFFAOYSA-N 0.000 description 4
- PPBRXRYQALVLMV-UHFFFAOYSA-N Styrene Chemical compound C=CC1=CC=CC=C1 PPBRXRYQALVLMV-UHFFFAOYSA-N 0.000 description 4
- WERYXYBDKMZEQL-UHFFFAOYSA-N butane-1,4-diol Chemical compound OCCCCO WERYXYBDKMZEQL-UHFFFAOYSA-N 0.000 description 4
- 230000000052 comparative effect Effects 0.000 description 4
- 239000002131 composite material Substances 0.000 description 4
- 238000013461 design Methods 0.000 description 4
- 238000011156 evaluation Methods 0.000 description 4
- NAQMVNRVTILPCV-UHFFFAOYSA-N hexane-1,6-diamine Chemical compound NCCCCCCN NAQMVNRVTILPCV-UHFFFAOYSA-N 0.000 description 4
- 239000012948 isocyanate Substances 0.000 description 4
- 239000004417 polycarbonate Substances 0.000 description 4
- 229920000515 polycarbonate Polymers 0.000 description 4
- 229920001225 polyester resin Polymers 0.000 description 4
- 239000004645 polyester resin Substances 0.000 description 4
- 230000008961 swelling Effects 0.000 description 4
- 238000012360 testing method Methods 0.000 description 4
- VZCYOOQTPOCHFL-UHFFFAOYSA-N trans-butenedioic acid Natural products OC(=O)C=CC(O)=O VZCYOOQTPOCHFL-UHFFFAOYSA-N 0.000 description 4
- KWKAKUADMBZCLK-UHFFFAOYSA-N 1-octene Chemical compound CCCCCCC=C KWKAKUADMBZCLK-UHFFFAOYSA-N 0.000 description 3
- 239000004970 Chain extender Substances 0.000 description 3
- VGGSQFUCUMXWEO-UHFFFAOYSA-N Ethene Chemical compound C=C VGGSQFUCUMXWEO-UHFFFAOYSA-N 0.000 description 3
- 239000005977 Ethylene Substances 0.000 description 3
- 239000005057 Hexamethylene diisocyanate Substances 0.000 description 3
- OKKJLVBELUTLKV-UHFFFAOYSA-N Methanol Chemical compound OC OKKJLVBELUTLKV-UHFFFAOYSA-N 0.000 description 3
- DNIAPMSPPWPWGF-UHFFFAOYSA-N Propylene glycol Chemical compound CC(O)CO DNIAPMSPPWPWGF-UHFFFAOYSA-N 0.000 description 3
- BQCADISMDOOEFD-UHFFFAOYSA-N Silver Chemical compound [Ag] BQCADISMDOOEFD-UHFFFAOYSA-N 0.000 description 3
- HEMHJVSKTPXQMS-UHFFFAOYSA-M Sodium hydroxide Chemical compound [OH-].[Na+] HEMHJVSKTPXQMS-UHFFFAOYSA-M 0.000 description 3
- YXFVVABEGXRONW-UHFFFAOYSA-N Toluene Chemical compound CC1=CC=CC=C1 YXFVVABEGXRONW-UHFFFAOYSA-N 0.000 description 3
- 150000001252 acrylic acid derivatives Chemical class 0.000 description 3
- 238000007259 addition reaction Methods 0.000 description 3
- 239000007795 chemical reaction product Substances 0.000 description 3
- 239000003431 cross linking reagent Substances 0.000 description 3
- 230000007613 environmental effect Effects 0.000 description 3
- 230000009477 glass transition Effects 0.000 description 3
- RRAMGCGOFNQTLD-UHFFFAOYSA-N hexamethylene diisocyanate Chemical compound O=C=NCCCCCCN=C=O RRAMGCGOFNQTLD-UHFFFAOYSA-N 0.000 description 3
- 150000002513 isocyanates Chemical class 0.000 description 3
- 230000014759 maintenance of location Effects 0.000 description 3
- 238000002074 melt spinning Methods 0.000 description 3
- WXZMFSXDPGVJKK-UHFFFAOYSA-N pentaerythritol Chemical compound OCC(CO)(CO)CO WXZMFSXDPGVJKK-UHFFFAOYSA-N 0.000 description 3
- 229920000728 polyester Polymers 0.000 description 3
- 239000005056 polyisocyanate Substances 0.000 description 3
- 229920001228 polyisocyanate Polymers 0.000 description 3
- 238000007127 saponification reaction Methods 0.000 description 3
- 229910052709 silver Inorganic materials 0.000 description 3
- 239000004332 silver Substances 0.000 description 3
- 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 3
- 125000000391 vinyl group Chemical group [H]C([*])=C([H])[H] 0.000 description 3
- MYRTYDVEIRVNKP-UHFFFAOYSA-N 1,2-Divinylbenzene Chemical compound C=CC1=CC=CC=C1C=C MYRTYDVEIRVNKP-UHFFFAOYSA-N 0.000 description 2
- FKTHNVSLHLHISI-UHFFFAOYSA-N 1,2-bis(isocyanatomethyl)benzene Chemical compound O=C=NCC1=CC=CC=C1CN=C=O FKTHNVSLHLHISI-UHFFFAOYSA-N 0.000 description 2
- VXNZUUAINFGPBY-UHFFFAOYSA-N 1-Butene Chemical compound CCC=C VXNZUUAINFGPBY-UHFFFAOYSA-N 0.000 description 2
- ZGEGCLOFRBLKSE-UHFFFAOYSA-N 1-Heptene Chemical compound CCCCCC=C ZGEGCLOFRBLKSE-UHFFFAOYSA-N 0.000 description 2
- LIKMAJRDDDTEIG-UHFFFAOYSA-N 1-hexene Chemical compound CCCCC=C LIKMAJRDDDTEIG-UHFFFAOYSA-N 0.000 description 2
- JAHNSTQSQJOJLO-UHFFFAOYSA-N 2-(3-fluorophenyl)-1h-imidazole Chemical compound FC1=CC=CC(C=2NC=CN=2)=C1 JAHNSTQSQJOJLO-UHFFFAOYSA-N 0.000 description 2
- SJIXRGNQPBQWMK-UHFFFAOYSA-N 2-(diethylamino)ethyl 2-methylprop-2-enoate Chemical compound CCN(CC)CCOC(=O)C(C)=C SJIXRGNQPBQWMK-UHFFFAOYSA-N 0.000 description 2
- JKNCOURZONDCGV-UHFFFAOYSA-N 2-(dimethylamino)ethyl 2-methylprop-2-enoate Chemical compound CN(C)CCOC(=O)C(C)=C JKNCOURZONDCGV-UHFFFAOYSA-N 0.000 description 2
- 125000000954 2-hydroxyethyl group Chemical group [H]C([*])([H])C([H])([H])O[H] 0.000 description 2
- RNLHGQLZWXBQNY-UHFFFAOYSA-N 3-(aminomethyl)-3,5,5-trimethylcyclohexan-1-amine Chemical compound CC1(C)CC(N)CC(C)(CN)C1 RNLHGQLZWXBQNY-UHFFFAOYSA-N 0.000 description 2
- 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 2
- CSCPPACGZOOCGX-UHFFFAOYSA-N Acetone Chemical compound CC(C)=O CSCPPACGZOOCGX-UHFFFAOYSA-N 0.000 description 2
- RTZKZFJDLAIYFH-UHFFFAOYSA-N Diethyl ether Chemical compound CCOCC RTZKZFJDLAIYFH-UHFFFAOYSA-N 0.000 description 2
- RPNUMPOLZDHAAY-UHFFFAOYSA-N Diethylenetriamine Chemical compound NCCNCCN RPNUMPOLZDHAAY-UHFFFAOYSA-N 0.000 description 2
- QUSNBJAOOMFDIB-UHFFFAOYSA-N Ethylamine Chemical compound CCN QUSNBJAOOMFDIB-UHFFFAOYSA-N 0.000 description 2
- 229920000181 Ethylene propylene rubber Polymers 0.000 description 2
- PIICEJLVQHRZGT-UHFFFAOYSA-N Ethylenediamine Chemical compound NCCN PIICEJLVQHRZGT-UHFFFAOYSA-N 0.000 description 2
- PEDCQBHIVMGVHV-UHFFFAOYSA-N Glycerine Chemical compound OCC(O)CO PEDCQBHIVMGVHV-UHFFFAOYSA-N 0.000 description 2
- 239000005058 Isophorone diisocyanate Substances 0.000 description 2
- RRHGJUQNOFWUDK-UHFFFAOYSA-N Isoprene Chemical compound CC(=C)C=C RRHGJUQNOFWUDK-UHFFFAOYSA-N 0.000 description 2
- BAPJBEWLBFYGME-UHFFFAOYSA-N Methyl acrylate Chemical compound COC(=O)C=C BAPJBEWLBFYGME-UHFFFAOYSA-N 0.000 description 2
- VVQNEPGJFQJSBK-UHFFFAOYSA-N Methyl methacrylate Chemical compound COC(=O)C(C)=C VVQNEPGJFQJSBK-UHFFFAOYSA-N 0.000 description 2
- LRHPLDYGYMQRHN-UHFFFAOYSA-N N-Butanol Chemical compound CCCCO LRHPLDYGYMQRHN-UHFFFAOYSA-N 0.000 description 2
- GLUUGHFHXGJENI-UHFFFAOYSA-N Piperazine Chemical compound C1CNCCN1 GLUUGHFHXGJENI-UHFFFAOYSA-N 0.000 description 2
- 239000002202 Polyethylene glycol Substances 0.000 description 2
- 239000004721 Polyphenylene oxide Substances 0.000 description 2
- OFOBLEOULBTSOW-UHFFFAOYSA-N Propanedioic acid Natural products OC(=O)CC(O)=O OFOBLEOULBTSOW-UHFFFAOYSA-N 0.000 description 2
- ZJCCRDAZUWHFQH-UHFFFAOYSA-N Trimethylolpropane Chemical compound CCC(CO)(CO)CO ZJCCRDAZUWHFQH-UHFFFAOYSA-N 0.000 description 2
- 150000003926 acrylamides Chemical class 0.000 description 2
- 150000001298 alcohols Chemical class 0.000 description 2
- 239000002216 antistatic agent Substances 0.000 description 2
- HQABUPZFAYXKJW-UHFFFAOYSA-N butan-1-amine Chemical compound CCCCN HQABUPZFAYXKJW-UHFFFAOYSA-N 0.000 description 2
- 125000003178 carboxy group Chemical group [H]OC(*)=O 0.000 description 2
- 239000004359 castor oil Substances 0.000 description 2
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- 239000001530 fumaric acid Substances 0.000 description 2
- BTCSSZJGUNDROE-UHFFFAOYSA-N gamma-aminobutyric acid Chemical compound NCCCC(O)=O BTCSSZJGUNDROE-UHFFFAOYSA-N 0.000 description 2
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- ZEMPKEQAKRGZGQ-XOQCFJPHSA-N glycerol triricinoleate Natural products CCCCCC[C@@H](O)CC=CCCCCCCCC(=O)OC[C@@H](COC(=O)CCCCCCCC=CC[C@@H](O)CCCCCC)OC(=O)CCCCCCCC=CC[C@H](O)CCCCCC ZEMPKEQAKRGZGQ-XOQCFJPHSA-N 0.000 description 2
- 125000003055 glycidyl group Chemical group C(C1CO1)* 0.000 description 2
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- 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 2
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- RUMACXVDVNRZJZ-UHFFFAOYSA-N 2-methylpropyl 2-methylprop-2-enoate Chemical compound CC(C)COC(=O)C(C)=C RUMACXVDVNRZJZ-UHFFFAOYSA-N 0.000 description 1
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- 125000003504 2-oxazolinyl group Chemical group O1C(=NCC1)* 0.000 description 1
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- GKXVJHDEWHKBFH-UHFFFAOYSA-N [2-(aminomethyl)phenyl]methanamine Chemical compound NCC1=CC=CC=C1CN GKXVJHDEWHKBFH-UHFFFAOYSA-N 0.000 description 1
- HVVWZTWDBSEWIH-UHFFFAOYSA-N [2-(hydroxymethyl)-3-prop-2-enoyloxy-2-(prop-2-enoyloxymethyl)propyl] prop-2-enoate Chemical compound C=CC(=O)OCC(CO)(COC(=O)C=C)COC(=O)C=C HVVWZTWDBSEWIH-UHFFFAOYSA-N 0.000 description 1
- UKMBKKFLJMFCSA-UHFFFAOYSA-N [3-hydroxy-2-(2-methylprop-2-enoyloxy)propyl] 2-methylprop-2-enoate Chemical compound CC(=C)C(=O)OCC(CO)OC(=O)C(C)=C UKMBKKFLJMFCSA-UHFFFAOYSA-N 0.000 description 1
- NIXOWILDQLNWCW-UHFFFAOYSA-N acrylic acid group Chemical group C(C=C)(=O)O NIXOWILDQLNWCW-UHFFFAOYSA-N 0.000 description 1
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- WGCNASOHLSPBMP-UHFFFAOYSA-N hydroxyacetaldehyde Natural products OCC=O WGCNASOHLSPBMP-UHFFFAOYSA-N 0.000 description 1
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- SLCVBVWXLSEKPL-UHFFFAOYSA-N neopentyl glycol Chemical compound OCC(C)(C)CO SLCVBVWXLSEKPL-UHFFFAOYSA-N 0.000 description 1
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Landscapes
- Synthetic Leather, Interior Materials Or Flexible Sheet Materials (AREA)
Description
(1)海成分が水溶性ポリビニルアルコール系樹脂である海島型繊維から長繊維ウェブを製造する工程、
(2)前記長繊維ウェブを絡合処理して絡合ウェブを製造する工程、
(3)前記水溶性ポリビニルアルコール系樹脂を水により抽出して海島型繊維を極細長繊維束に変換し、絡合不織布を製造する工程、及び
(4)前記絡合不織布にアクリル系樹脂及び合成ゴムを含有する水性分散液を含浸し、乾燥し、固化させる工程
を含む皮革様シートの製造方法に関する。
[(湿熱収縮処理前の面積−湿熱収縮処理後の面積)/湿熱収縮処理前の面積]×100
により計算される。
水溶性変性PVAを海成分、6モル%イソフタル酸変性ポリエチレンテレフタレ−ト(変性ポリエステル)を島成分として用い、海成分/島成分が25/75(質量比)となるように260℃の溶融複合紡糸用口金(島数:25島/繊維)から吐出した。紡糸速度が3700m/分となるようにエジェクター圧力(引き取り風圧)を調整し、平均繊度2.1デシテックスの海島型繊維をネット上に堆積し、スパンボンドシートを得た。
表面温度42℃の金属ロールでネット上のスパンボンドシートを軽く押さえることにより表面の毛羽立ちを抑えた。スパンボンドシートをネットから剥離し、表面温度55℃の格子柄の金属ロールとバックロールとの間で200N/mmの線圧でスパンボンドシートを熱プレスし、表層の海島型繊維が格子状に仮融着された目付31g/m2の長繊維ウェブを得た。
収縮処理による面積収縮率は52%であった。また、絡合不織布の目付は760g/m2、見掛け密度は0.602g/cm3、剥離強力は13.3kg/25mmであった。
(a)100質量部の固形分濃度60質量%の水系アクリルエマルジョン(日華化学製カセゾールARS−2)
(b)50質量部の固形分濃度30質量%の水系ゴムエマルジョン(豊島化学製ゴムエマルジョン#1562)
(c)50質量部の固形分濃度50質量%加脂剤(豊島化学製オイルGR−50)
(d)90質量部の顔料(御国色素製SAブラック14780)
水性分散液中のアクリル系樹脂、合成ゴム、加脂剤の固形分比は60:15:25であった。
アクリル系樹脂、合成ゴム、及び加脂剤の合計付着量を絡合不織布に対して6質量%に変更した以外は実施例1と同様にして皮革様シートを得、得られた皮革様シートを実施例1と同様に熱プレス処理した。
アクリル系樹脂、合成ゴム、及び加脂剤の合計付着量を絡合不織布に対して2質量%に変更した以外は実施例1と同様にして皮革様シートを得、得られた皮革様シートを実施例1と同様に熱プレス処理した。
水性分散液中のアクリル系樹脂、合成ゴム、加脂剤の固形分比を0:80:20に変更し、合成ゴム及び加脂剤を合計で絡合不織布に対して6質量%に付着させた以外は実施例1と同様にして皮革様シートを得、得られた皮革様シートを実施例1と同様に熱プレス処理した。
水性分散液中のアクリル系樹脂、合成ゴム、加脂剤の固形分比を0:100:0に変更し、合成ゴムのみを絡合不織布に対して6質量%付着させた以外は実施例1と同様にして皮革様シートを得、得られた皮革様シートを実施例1と同様に熱プレス処理した。
水性分散液中のアクリル系樹脂、合成ゴム、加脂剤の固形分比を100:0:0に変更し、アクリル系樹脂のみを絡合不織布に対して6質量%付着させた以外は実施例1と同様にして皮革様シートを得、得られた皮革様シートを実施例1と同様に熱プレス処理した。
水性分散液中のアクリル系樹脂、合成ゴム、加脂剤の固形分比を60:0:40に変更し、アクリル系樹脂と加脂剤を合計で絡合不織布に対して6質量%付着させた以外は実施例1と同様にして皮革様シートを得、得られた皮革様シートを実施例1と同様に熱プレス処理した。
熱プレス処理(エンボス処理)した後の皮革様シートについて下記の評価をした。各評価結果を第1表に示す。
皮革様シートを用いた製品の製造に従事する者、皮革様シート製品の販売に従事する者から任意に選んだ5人により、エンボス処理後の皮革様シートの風合いを評価し、5人の評価に基づき下記のように判定した。
A:天然皮革より特に柔らかい
B:天然皮革より柔らかい
C:天然皮革並み
D:天然皮革より硬い
上記のように、皮革様シートの表面をライン速度2m/分、172℃、4Kg/cm2の条件で表面に凹凸を有するエンボスロールを用いてエンボス処理した後の厚みの変化を測定した。エンボス処理後の厚みがエンボス処理前の厚みの60%未満である場合を「不良」、60〜80%である場合を「良好」、80%を超える場合を「極めて良好」と判定した。
エンボス性とは、皮革様シート上に形成されたエンボスパターンの良好性の基準であり、エンボスロールのパターンが皮革様シートに転写される精度の指標である。
測定には 菱化システム社製のバートスキャンを用いた。バートスキャンは光干渉方式で表面の凹凸をナノオーダーで測定する装置である。エンボス処理した皮革様シート表面の凹凸の深さを測定し、エンボスロール表面の凹凸の深さに対する割合を求め、45%未満の場合を「不良」、45〜60%の場合を「良好」、60%を超える場合を「特に良好」と判定した。
Claims (8)
- 極細繊維束からなる絡合不織布、及び、その内部に含有されたアクリル系樹脂、加脂剤及び合成ゴムからなり、該アクリル系樹脂、該加脂剤及び該合成ゴムがこれらを含む水性分散液の固化物であり、前記合成ゴムが、オレフィンゴム又はアクリロニトリル−ブタジエンゴムである、皮革様シート。
- 前記アクリル系樹脂の含有量が絡合不織布の3〜10質量%であり、前記合成ゴムの含有量が絡合不織布の0.3〜3質量%であり、該アクリル系樹脂と該合成ゴムの質量比が2/1〜8/1である請求項1に記載の皮革様シート。
- 前記加脂剤の含有量が絡合不織布の1〜4質量%であり、該加脂剤と合成ゴムの質量比が1:1〜20:1である請求項1又は2に記載の皮革様シート。
- 前記加脂剤が動物油、植物油、及び動物油、植物油の半合成品から選ばれる請求項1〜3のいずれか1項に記載の皮革様シート。
- 絡合不織布の内部に水分散性ポリウレタンをさらに含有する請求項1〜4のいずれか1項に記載の皮革様シート。
- 請求項1〜5のいずれか1項に記載の皮革様シートからなる銀付調皮革様シート。
- (1)海成分が水溶性ポリビニルアルコール系樹脂である海島型繊維から長繊維ウェブを製造する工程、
(2)前記長繊維ウェブを絡合処理して絡合ウェブを製造する工程、
(3)前記水溶性ポリビニルアルコール系樹脂を水により抽出して海島型繊維を極細長繊維束に変換し、絡合不織布を製造する工程、及び
(4)前記絡合不織布にアクリル系樹脂、加脂剤、及びオレフィンゴム又はアクリロニトリル−ブタジエンゴムである合成ゴムを含有する水性分散液を含浸し、乾燥し、固化させる工程
を含む皮革様シートの製造方法。 - 前記水性分散液が水性エマルジョンである請求項7に記載の製造方法。
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