Abstract
Homopolymers consisting of crystalline and possibly amorphous parts can be transferred to microporous products. A homopolymer, like polyethylene for instance, is treated with a swelling agent like perchloroethylene. Then the foil is stretched and the swelling agent removed [3, 20]. Homopolymers like polypropylene or polytetrafiuoroethylene (PTFE) (9.3 [11]) are in a crystalline state at room temperature. If films are stretched a kind of mini-crack occurs, which remain as micropores. Polymers with a partial crystalline structure such as polyolefins, polyacetates or polyamides become microporous by stretching [21].
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References
See also: 4.2 [11], 9.2 [11], 10 [3, 47], 11 [10], 18 [6–8, 13, 24, 44, 62, 86], 20.1 [16], 27 [62]
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US 3 664 915 (WL Gore, US Prior. 3.10.69/23.5.72)
DOS 3 020 335 (Celanese Corp., JW Soehngen, K Ostrander; 29.5.80/11.12.80; US Prior. 1.6.79)
DOS 3 020 372 (Celanese Corp; JW Soehngen; 29.5.80/11.12.80; US Prior. 1.6.79)
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US 4194 041 (WL Gore 8c Ass.; WL.Gore, B Allen; 29.6.78/18.3.80)
US 3 953 566 (WL Gore 8c Ass.; WL Gore; 3.7.73/27.4.76)
US 4 942 214 (WL Gore 8c Ass.; DJ Sakhpara; 29.6.88/17.7.90)
EP 0 427 769 (WL Gore 8c Ass.; KR Driskill, RL Henn; 25.7.89/22.5.91; US Prior. 27.7.88)=WO 9 000 969-A
JA 5 91 58 252-A (Japan Gore Tex KK; 1.3.83/7.9.84)
EP 184 392 (3M; 4.12.84/11.6.86)
EP 615 779 (WL Gore 8c Ass.; W Buerger; 16.3.93/21.9.94)=DE 4 308 369
EP 637 610 (Himont Inc.; M Hallam; It Prior. 3.8.93/8.2.95)
WO 9300837 (Gore 8c Assoc. Inc.; KR Driskill, RL Henn, J Norvell; 12.7.91/21.1.93)=US 5 289 644; EP 595 941=JA 7500026
DOS 2 737 756 (Gore; 22.8.77/1.3.79)
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JA 10 34 726 (Tokuyama Soda KK; 30.7.87/6.2.89)=JA 87–188901;
JA 88 136 153 (Tokuyama Soda KK; S Nagou, S Nakamura; 12.6.86)=JA 86–135 018
DOS 2 737 745 (Akzo; AJ Castro; 9.3.78)
OS 2 055 193 (Celanese Corp.; ML Drum et al.; US Prior. 13.11.69 and 28.10.70; 10.11.70/ 19.5.71)
US 2 757100 (DuPont; VL Simril; 4.n.52/3i.7.56)=FR 1 090 575=DAS 1 010 945=GB 763 604
DOS 19 625 389 (WL Gore & Ass. GmbH; W Zehnder; 25.6.97/2.1.98)
16.1 Mixtures of Incompatible Polymers
JA 43 150/72 (Toyo Spinning Co. Ltd.; 17.7.69/31.10.72)
JA 22 311/67 (Kyodo Kasei Kogyo Co. Ltd.; 29.12.62/1.11.67)
JA 5 677/68 (Shoshichi; 3.8.62/1.3.68)
GB 999 868 (US Rubber; US Prior. 11.6.63; 17.4.64/28.7.65)
US 3 536 638 (Uniroyal; LP Dosman; 8.11.68/27.10.70; cip 3.9.65 and 21.6.63)
JA 39 509/71 (Toyo Spinning; 8.10.68/20.11.71)
FR 2 022 928 (Uniroyal Inc.; LPh Dosman; US Prior. 8.11.68; 7.11.69/7.8.70)
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JA 73–28 789 (Sumitomo Electric Ind.; 4.11.64/4.9.73)
JA 74–001 841 (Kuraray Co. Ltd.; 6.8.70/17.1.74
JA 73–5 882 (Mitsubishi Plastics Ind. Ltd.; 30.6.70/21.2.73)
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JA 07 070 944 (Toyo Cloth; 2.9.93/14.3.95)
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16.2 Incorporation of Solid Compounds
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OS 1 629 326 (Continental; K Brünger, F Koch; 17.5.66/28.1.71)
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JA 61160480 (Toray Ind. Inc.; 7.1.85/21.7.86)=JA 85–164
OS 1908 677 (Bayer; KA Weber et al.; 21.2.69/10.9.70)
JA 9158 051 (Seiren Co. Ltd.; M Masahiro, M Yoshiki, O Kenji; 13.12.95/17.6.97)=JA 95–346 285
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JA 7 331 884 (Kawaguchi Rubber Ind. Co. Ltd.; 11.11.69/2.10.73)
JA 39 510/71 (Toyo Spinning; 8.10.68/20.11.71)
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OS 1 635 631 (T. Takase Co.; T Iseki; 13.5.64/20.8.70)
JA 73–23 884 (Nippon Cloth Kogyo Co. Ltd.; 26.8.70/17.7.73)
JA 73–20 425 (Nippon Cloth Ind. Co. Ltd.; 31.7.70/21.6.73)
OS 2 249 199 (Kureha Kagaku Kogyo KK; M Onozuka et al.; JA Prior. 5.10.71; 5.10.72/ 12.4.73)
OS 2 426 193 (Celanese Corp.; HS Bierenbaum et al.; US Prior. 30.5.73; 29.5.74/19.12.74)
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JA 11753/65 (Teijin Co.Ltd.; 4.7.63/11.6.65)
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JA 61160 480 (Toray Ind. Inc.; 7.1.85/21.7.86)=JA 85–164
JA 06 093 571 (Daüchi Lace KK; Hosokawa Micron KK, 26.9.91/5.4.94)=JA 91–0318 744
JA 060 93 571 (Daüchi Lace KK; Hosokawa Micron KK, 26.9.91/5.4.94)
JA 061 92 433 (Kyoeisha Kagaku KK; Osaka Prefecture; Tomen KK; 24.12.92/12.7.94)
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Träubel, H. (1999). Crystallization of Homopolymers. In: New Materials Permeable to Water Vapor. Springer, Berlin, Heidelberg. https://doi.org/10.1007/978-3-642-59978-1_16
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DOI: https://doi.org/10.1007/978-3-642-59978-1_16
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