PL88874B1 - - Google Patents
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- Publication number
- PL88874B1 PL88874B1 PL1968124509A PL12450968A PL88874B1 PL 88874 B1 PL88874 B1 PL 88874B1 PL 1968124509 A PL1968124509 A PL 1968124509A PL 12450968 A PL12450968 A PL 12450968A PL 88874 B1 PL88874 B1 PL 88874B1
- Authority
- PL
- Poland
- Prior art keywords
- fibers
- group
- formula
- trans
- shrinkage
- Prior art date
Links
- 239000000835 fiber Substances 0.000 claims description 241
- 229920000642 polymer Polymers 0.000 claims description 90
- 238000000034 method Methods 0.000 claims description 33
- 150000004985 diamines Chemical class 0.000 claims description 25
- 239000004952 Polyamide Substances 0.000 claims description 20
- 229920002647 polyamide Polymers 0.000 claims description 20
- QQVIHTHCMHWDBS-UHFFFAOYSA-N isophthalic acid Chemical compound OC(=O)C1=CC=CC(C(O)=O)=C1 QQVIHTHCMHWDBS-UHFFFAOYSA-N 0.000 claims description 18
- OFOBLEOULBTSOW-UHFFFAOYSA-N Malonic acid Chemical compound OC(=O)CC(O)=O OFOBLEOULBTSOW-UHFFFAOYSA-N 0.000 claims description 11
- 150000001412 amines Chemical class 0.000 claims description 5
- UFHFLCQGNIYNRP-UHFFFAOYSA-N Hydrogen Chemical compound [H][H] UFHFLCQGNIYNRP-UHFFFAOYSA-N 0.000 claims description 2
- 229910052739 hydrogen Inorganic materials 0.000 claims description 2
- 239000001257 hydrogen Substances 0.000 claims description 2
- 125000002496 methyl group Chemical group [H]C([H])([H])* 0.000 claims description 2
- 229920006018 co-polyamide Polymers 0.000 claims 1
- 239000004744 fabric Substances 0.000 description 43
- 229920001577 copolymer Polymers 0.000 description 37
- 238000009835 boiling Methods 0.000 description 30
- 150000003839 salts Chemical class 0.000 description 27
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 25
- 238000010438 heat treatment Methods 0.000 description 23
- 239000000243 solution Substances 0.000 description 22
- QTBSBXVTEAMEQO-UHFFFAOYSA-N Acetic acid Chemical compound CC(O)=O QTBSBXVTEAMEQO-UHFFFAOYSA-N 0.000 description 21
- 239000000203 mixture Substances 0.000 description 16
- 229920001519 homopolymer Polymers 0.000 description 14
- DZIHTWJGPDVSGE-UHFFFAOYSA-N 4-[(4-aminocyclohexyl)methyl]cyclohexan-1-amine Chemical class C1CC(N)CCC1CC1CCC(N)CC1 DZIHTWJGPDVSGE-UHFFFAOYSA-N 0.000 description 10
- -1 poly (hexiomethylene isophthalamide Chemical compound 0.000 description 10
- 230000008569 process Effects 0.000 description 10
- KFZMGEQAYNKOFK-UHFFFAOYSA-N Isopropanol Chemical compound CC(C)O KFZMGEQAYNKOFK-UHFFFAOYSA-N 0.000 description 9
- VNWKTOKETHGBQD-UHFFFAOYSA-N methane Chemical compound C VNWKTOKETHGBQD-UHFFFAOYSA-N 0.000 description 9
- 238000003303 reheating Methods 0.000 description 9
- WMRCTEPOPAZMMN-UHFFFAOYSA-N 2-undecylpropanedioic acid Chemical class CCCCCCCCCCCC(C(O)=O)C(O)=O WMRCTEPOPAZMMN-UHFFFAOYSA-N 0.000 description 8
- IJGRMHOSHXDMSA-UHFFFAOYSA-N Atomic nitrogen Chemical compound N#N IJGRMHOSHXDMSA-UHFFFAOYSA-N 0.000 description 8
- GWEVSGVZZGPLCZ-UHFFFAOYSA-N Titan oxide Chemical compound O=[Ti]=O GWEVSGVZZGPLCZ-UHFFFAOYSA-N 0.000 description 8
- BDAGIHXWWSANSR-UHFFFAOYSA-N methanoic acid Natural products OC=O BDAGIHXWWSANSR-UHFFFAOYSA-N 0.000 description 8
- 239000002253 acid Substances 0.000 description 7
- 238000001125 extrusion Methods 0.000 description 7
- 239000008187 granular material Substances 0.000 description 7
- CXMXRPHRNRROMY-UHFFFAOYSA-N sebacic acid Chemical compound OC(=O)CCCCCCCCC(O)=O CXMXRPHRNRROMY-UHFFFAOYSA-N 0.000 description 7
- 229920002302 Nylon 6,6 Polymers 0.000 description 6
- NAQMVNRVTILPCV-UHFFFAOYSA-N hexane-1,6-diamine Chemical compound NCCCCCCN NAQMVNRVTILPCV-UHFFFAOYSA-N 0.000 description 6
- 238000002844 melting Methods 0.000 description 6
- 230000008018 melting Effects 0.000 description 6
- 238000006116 polymerization reaction Methods 0.000 description 6
- 238000010411 cooking Methods 0.000 description 5
- 238000001816 cooling Methods 0.000 description 5
- 230000000694 effects Effects 0.000 description 5
- NLYAJNPCOHFWQQ-UHFFFAOYSA-N kaolin Chemical compound O.O.O=[Al]O[Si](=O)O[Si](=O)O[Al]=O NLYAJNPCOHFWQQ-UHFFFAOYSA-N 0.000 description 5
- 229910052622 kaolinite Inorganic materials 0.000 description 5
- 238000004519 manufacturing process Methods 0.000 description 5
- 230000006641 stabilisation Effects 0.000 description 5
- 238000011105 stabilization Methods 0.000 description 5
- OSWFIVFLDKOXQC-UHFFFAOYSA-N 4-(3-methoxyphenyl)aniline Chemical compound COC1=CC=CC(C=2C=CC(N)=CC=2)=C1 OSWFIVFLDKOXQC-UHFFFAOYSA-N 0.000 description 4
- FDLQZKYLHJJBHD-UHFFFAOYSA-N [3-(aminomethyl)phenyl]methanamine Chemical compound NCC1=CC=CC(CN)=C1 FDLQZKYLHJJBHD-UHFFFAOYSA-N 0.000 description 4
- 230000008901 benefit Effects 0.000 description 4
- 235000019253 formic acid Nutrition 0.000 description 4
- FLFJVPPJGJSHMF-UHFFFAOYSA-L manganese hypophosphite Chemical compound [Mn+2].[O-]P=O.[O-]P=O FLFJVPPJGJSHMF-UHFFFAOYSA-L 0.000 description 4
- 229910052757 nitrogen Inorganic materials 0.000 description 4
- BDJRBEYXGGNYIS-UHFFFAOYSA-N nonanedioic acid Chemical compound OC(=O)CCCCCCCC(O)=O BDJRBEYXGGNYIS-UHFFFAOYSA-N 0.000 description 4
- 238000002360 preparation method Methods 0.000 description 4
- 239000002904 solvent Substances 0.000 description 4
- 239000003381 stabilizer Substances 0.000 description 4
- 238000012360 testing method Methods 0.000 description 4
- 239000004408 titanium dioxide Substances 0.000 description 4
- 238000006243 chemical reaction Methods 0.000 description 3
- 238000009826 distribution Methods 0.000 description 3
- 239000012467 final product Substances 0.000 description 3
- 239000000463 material Substances 0.000 description 3
- 238000002156 mixing Methods 0.000 description 3
- 230000003287 optical effect Effects 0.000 description 3
- 238000012545 processing Methods 0.000 description 3
- 238000004804 winding Methods 0.000 description 3
- RTZKZFJDLAIYFH-UHFFFAOYSA-N Diethyl ether Chemical compound CCOCC RTZKZFJDLAIYFH-UHFFFAOYSA-N 0.000 description 2
- 244000007853 Sarothamnus scoparius Species 0.000 description 2
- 150000007513 acids Chemical class 0.000 description 2
- 239000002216 antistatic agent Substances 0.000 description 2
- 230000015572 biosynthetic process Effects 0.000 description 2
- 239000003795 chemical substances by application Substances 0.000 description 2
- 150000001875 compounds Chemical class 0.000 description 2
- 239000000470 constituent Substances 0.000 description 2
- 125000004427 diamine group Chemical group 0.000 description 2
- SNRUBQQJIBEYMU-UHFFFAOYSA-N dodecane Chemical compound CCCCCCCCCCCC SNRUBQQJIBEYMU-UHFFFAOYSA-N 0.000 description 2
- POULHZVOKOAJMA-UHFFFAOYSA-N dodecanoic acid Chemical compound CCCCCCCCCCCC(O)=O POULHZVOKOAJMA-UHFFFAOYSA-N 0.000 description 2
- 238000001035 drying Methods 0.000 description 2
- 230000002349 favourable effect Effects 0.000 description 2
- 238000007730 finishing process Methods 0.000 description 2
- 238000005984 hydrogenation reaction Methods 0.000 description 2
- 239000004615 ingredient Substances 0.000 description 2
- 238000005259 measurement Methods 0.000 description 2
- SYSQUGFVNFXIIT-UHFFFAOYSA-N n-[4-(1,3-benzoxazol-2-yl)phenyl]-4-nitrobenzenesulfonamide Chemical class C1=CC([N+](=O)[O-])=CC=C1S(=O)(=O)NC1=CC=C(C=2OC3=CC=CC=C3N=2)C=C1 SYSQUGFVNFXIIT-UHFFFAOYSA-N 0.000 description 2
- 230000035882 stress Effects 0.000 description 2
- 238000006467 substitution reaction Methods 0.000 description 2
- 238000005406 washing Methods 0.000 description 2
- RYHBNJHYFVUHQT-UHFFFAOYSA-N 1,4-Dioxane Chemical compound C1COCCO1 RYHBNJHYFVUHQT-UHFFFAOYSA-N 0.000 description 1
- SVKPOEIKEBFDDN-UHFFFAOYSA-N 1-ethenylazetidin-2-one Chemical compound C=CN1CCC1=O SVKPOEIKEBFDDN-UHFFFAOYSA-N 0.000 description 1
- PBGPBHYPCGDFEZ-UHFFFAOYSA-N 1-ethenylpiperidin-2-one Chemical compound C=CN1CCCCC1=O PBGPBHYPCGDFEZ-UHFFFAOYSA-N 0.000 description 1
- 241000252254 Catostomidae Species 0.000 description 1
- 229920000742 Cotton Polymers 0.000 description 1
- LFQSCWFLJHTTHZ-UHFFFAOYSA-N Ethanol Chemical compound CCO LFQSCWFLJHTTHZ-UHFFFAOYSA-N 0.000 description 1
- 239000004683 Homopolymer polyamide Substances 0.000 description 1
- 229920003171 Poly (ethylene oxide) Polymers 0.000 description 1
- 239000004698 Polyethylene Substances 0.000 description 1
- 238000002441 X-ray diffraction Methods 0.000 description 1
- ISKQADXMHQSTHK-UHFFFAOYSA-N [4-(aminomethyl)phenyl]methanamine Chemical compound NCC1=CC=C(CN)C=C1 ISKQADXMHQSTHK-UHFFFAOYSA-N 0.000 description 1
- 239000006096 absorbing agent Substances 0.000 description 1
- 230000009471 action Effects 0.000 description 1
- 230000002411 adverse Effects 0.000 description 1
- 238000013019 agitation Methods 0.000 description 1
- 125000001931 aliphatic group Chemical group 0.000 description 1
- 239000000956 alloy Substances 0.000 description 1
- 229910045601 alloy Inorganic materials 0.000 description 1
- 238000004458 analytical method Methods 0.000 description 1
- 239000007864 aqueous solution Substances 0.000 description 1
- 125000003118 aryl group Chemical group 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 238000004364 calculation method Methods 0.000 description 1
- 125000004432 carbon atom Chemical group C* 0.000 description 1
- 230000008859 change Effects 0.000 description 1
- 238000012937 correction Methods 0.000 description 1
- AVKNGPAMCBSNSO-UHFFFAOYSA-N cyclohexylmethanamine Chemical compound NCC1CCCCC1 AVKNGPAMCBSNSO-UHFFFAOYSA-N 0.000 description 1
- 230000007423 decrease Effects 0.000 description 1
- 239000011928 denatured alcohol Substances 0.000 description 1
- 230000004069 differentiation Effects 0.000 description 1
- 230000009429 distress Effects 0.000 description 1
- 229920006240 drawn fiber Polymers 0.000 description 1
- 239000000975 dye Substances 0.000 description 1
- 150000002170 ethers Chemical class 0.000 description 1
- 238000001704 evaporation Methods 0.000 description 1
- 238000012681 fiber drawing Methods 0.000 description 1
- 239000000945 filler Substances 0.000 description 1
- 239000000706 filtrate Substances 0.000 description 1
- ZZUFCTLCJUWOSV-UHFFFAOYSA-N furosemide Chemical compound C1=C(Cl)C(S(=O)(=O)N)=CC(C(O)=O)=C1NCC1=CC=CO1 ZZUFCTLCJUWOSV-UHFFFAOYSA-N 0.000 description 1
- 125000001475 halogen functional group Chemical group 0.000 description 1
- 230000006872 improvement Effects 0.000 description 1
- 150000002531 isophthalic acids Chemical class 0.000 description 1
- 238000005304 joining Methods 0.000 description 1
- 238000009940 knitting Methods 0.000 description 1
- 239000004611 light stabiliser Substances 0.000 description 1
- 239000007788 liquid Substances 0.000 description 1
- 239000000314 lubricant Substances 0.000 description 1
- 239000000155 melt Substances 0.000 description 1
- 239000000178 monomer Substances 0.000 description 1
- 239000004570 mortar (masonry) Substances 0.000 description 1
- 229920001778 nylon Polymers 0.000 description 1
- BNJOQKFENDDGSC-UHFFFAOYSA-N octadecanedioic acid Chemical compound OC(=O)CCCCCCCCCCCCCCCCC(O)=O BNJOQKFENDDGSC-UHFFFAOYSA-N 0.000 description 1
- 238000005192 partition Methods 0.000 description 1
- 239000008188 pellet Substances 0.000 description 1
- ACVYVLVWPXVTIT-UHFFFAOYSA-M phosphinate Chemical compound [O-][PH2]=O ACVYVLVWPXVTIT-UHFFFAOYSA-M 0.000 description 1
- 239000000049 pigment Substances 0.000 description 1
- 229920000191 poly(N-vinyl pyrrolidone) Polymers 0.000 description 1
- 229920001281 polyalkylene Polymers 0.000 description 1
- 229920000573 polyethylene Polymers 0.000 description 1
- 230000003449 preventive effect Effects 0.000 description 1
- 239000000047 product Substances 0.000 description 1
- 150000003254 radicals Chemical class 0.000 description 1
- 230000009467 reduction Effects 0.000 description 1
- 230000002040 relaxant effect Effects 0.000 description 1
- 239000011833 salt mixture Substances 0.000 description 1
- 238000000926 separation method Methods 0.000 description 1
- 238000009958 sewing Methods 0.000 description 1
- 239000002002 slurry Substances 0.000 description 1
- 239000007787 solid Substances 0.000 description 1
- 239000000126 substance Substances 0.000 description 1
- 125000001424 substituent group Chemical group 0.000 description 1
- 239000000725 suspension Substances 0.000 description 1
- 238000003786 synthesis reaction Methods 0.000 description 1
- 230000007704 transition Effects 0.000 description 1
Classifications
-
- D—TEXTILES; PAPER
- D02—YARNS; MECHANICAL FINISHING OF YARNS OR ROPES; WARPING OR BEAMING
- D02G—CRIMPING OR CURLING FIBRES, FILAMENTS, THREADS, OR YARNS; YARNS OR THREADS
- D02G1/00—Producing crimped or curled fibres, filaments, yarns, or threads, giving them latent characteristics
- D02G1/18—Producing crimped or curled fibres, filaments, yarns, or threads, giving them latent characteristics by combining fibres, filaments, or yarns, having different shrinkage characteristics
-
- D—TEXTILES; PAPER
- D01—NATURAL OR MAN-MADE THREADS OR FIBRES; SPINNING
- D01D—MECHANICAL METHODS OR APPARATUS IN THE MANUFACTURE OF ARTIFICIAL FILAMENTS, THREADS, FIBRES, BRISTLES OR RIBBONS
- D01D5/00—Formation of filaments, threads, or the like
- D01D5/22—Formation of filaments, threads, or the like with a crimped or curled structure; with a special structure to simulate wool
-
- D—TEXTILES; PAPER
- D01—NATURAL OR MAN-MADE THREADS OR FIBRES; SPINNING
- D01F—CHEMICAL FEATURES IN THE MANUFACTURE OF ARTIFICIAL FILAMENTS, THREADS, FIBRES, BRISTLES OR RIBBONS; APPARATUS SPECIALLY ADAPTED FOR THE MANUFACTURE OF CARBON FILAMENTS
- D01F6/00—Monocomponent artificial filaments or the like of synthetic polymers; Manufacture thereof
- D01F6/58—Monocomponent artificial filaments or the like of synthetic polymers; Manufacture thereof from homopolycondensation products
- D01F6/60—Monocomponent artificial filaments or the like of synthetic polymers; Manufacture thereof from homopolycondensation products from polyamides
-
- D—TEXTILES; PAPER
- D01—NATURAL OR MAN-MADE THREADS OR FIBRES; SPINNING
- D01F—CHEMICAL FEATURES IN THE MANUFACTURE OF ARTIFICIAL FILAMENTS, THREADS, FIBRES, BRISTLES OR RIBBONS; APPARATUS SPECIALLY ADAPTED FOR THE MANUFACTURE OF CARBON FILAMENTS
- D01F6/00—Monocomponent artificial filaments or the like of synthetic polymers; Manufacture thereof
- D01F6/78—Monocomponent artificial filaments or the like of synthetic polymers; Manufacture thereof from copolycondensation products
- D01F6/80—Monocomponent artificial filaments or the like of synthetic polymers; Manufacture thereof from copolycondensation products from copolyamides
Landscapes
- Engineering & Computer Science (AREA)
- Textile Engineering (AREA)
- Mechanical Engineering (AREA)
- Chemical & Material Sciences (AREA)
- Chemical Kinetics & Catalysis (AREA)
- General Chemical & Material Sciences (AREA)
- Artificial Filaments (AREA)
- Yarns And Mechanical Finishing Of Yarns Or Ropes (AREA)
- Polyamides (AREA)
- Treatments For Attaching Organic Compounds To Fibrous Goods (AREA)
Applications Claiming Priority (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| US60828167A | 1967-01-10 | 1967-01-10 | |
| US667095A US3416302A (en) | 1967-01-10 | 1967-09-12 | Differential shrinkage yarn |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| PL88874B1 true PL88874B1 (en, 2012) | 1976-10-30 |
Family
ID=27085717
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| PL1968124509A PL88874B1 (en, 2012) | 1967-01-10 | 1968-01-03 |
Country Status (13)
| Country | Link |
|---|---|
| US (1) | US3416302A (en, 2012) |
| AT (1) | AT303951B (en, 2012) |
| BE (1) | BE709143A (en, 2012) |
| CH (1) | CH529239A (en, 2012) |
| DK (1) | DK132340C (en, 2012) |
| ES (1) | ES348990A1 (en, 2012) |
| FR (1) | FR1583192A (en, 2012) |
| GB (1) | GB1216883A (en, 2012) |
| IL (1) | IL29206A (en, 2012) |
| NL (1) | NL144673B (en, 2012) |
| PL (1) | PL88874B1 (en, 2012) |
| SE (1) | SE325100B (en, 2012) |
| SU (1) | SU381233A3 (en, 2012) |
Families Citing this family (17)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US3526084A (en) * | 1967-12-11 | 1970-09-01 | Burlington Industries Inc | Production of unique yarns |
| US3495392A (en) * | 1968-06-26 | 1970-02-17 | Du Pont | Bulky dyed yarns |
| US3851457A (en) * | 1969-03-10 | 1974-12-03 | Ici Ltd | Core yarns and methods for their manufacture |
| US3583147A (en) * | 1969-06-30 | 1971-06-08 | Du Pont | Heat-set mechanically crimped filaments having different polyamide compositions |
| NL7108318A (en, 2012) * | 1970-07-04 | 1972-01-06 | ||
| US3732684A (en) * | 1971-02-23 | 1973-05-15 | Du Pont | Product and process |
| US3725358A (en) * | 1971-04-12 | 1973-04-03 | Phillips Petroleum Co | Polyamide fibers from mixture of 1,3-bis-(4-piperidyl) propane and bis(p-aminocyclohexyl) methane |
| US3936426A (en) * | 1971-12-21 | 1976-02-03 | Phillips Petroleum Company | Amorphous, optically clear polyamide from a bis(4-aminocyclohexyl)methane and a phenylindan dicarboxylic acid |
| US3998042A (en) * | 1972-09-26 | 1976-12-21 | E. I. Du Pont De Nemours And Company | Mixed shrinkage yarn |
| US3839299A (en) * | 1972-11-27 | 1974-10-01 | Phillips Petroleum Co | Amorphous polyamide from bis(4-aminocyclohexyl)methane, bis(carboxyphenyl)methane and alkylene dicarboxylic acid |
| JPS5625534B2 (en, 2012) * | 1973-08-24 | 1981-06-12 | ||
| FR2318956A1 (fr) * | 1975-07-25 | 1977-02-18 | Du Pont | Fils fantaisies a torsion nulle et procede pour leur production |
| US4097469A (en) * | 1976-04-15 | 1978-06-27 | Phillips Petroleum Company | Process for preparing polyamides of PACP |
| JPS5381746A (en) * | 1976-12-15 | 1978-07-19 | Du Pont | Roving and method of making thereof |
| US4792624A (en) * | 1987-02-26 | 1988-12-20 | The Dow Chemical Company | Process for polymeric MDA, recycle of finished polymeric MDA |
| US5058371A (en) * | 1989-11-30 | 1991-10-22 | Monsanto Company | Continuous filament yarn for trackless carpet |
| CN102877182A (zh) * | 2011-07-15 | 2013-01-16 | 东丽纤维研究所（中国）有限公司 | 一种聚酰胺纤维缝纫线及其生产方法 |
-
1967
- 1967-09-12 US US667095A patent/US3416302A/en not_active Expired - Lifetime
- 1967-12-25 IL IL29206A patent/IL29206A/xx unknown
- 1967-12-29 DK DK657967A patent/DK132340C/da active
- 1967-12-29 SE SE18123/67A patent/SE325100B/xx unknown
-
1968
- 1968-01-03 PL PL1968124509A patent/PL88874B1/pl unknown
- 1968-01-05 ES ES348990A patent/ES348990A1/es not_active Expired
- 1968-01-08 AT AT16768A patent/AT303951B/de not_active IP Right Cessation
- 1968-01-09 FR FR1583192D patent/FR1583192A/fr not_active Expired
- 1968-01-09 NL NL686800315A patent/NL144673B/xx not_active IP Right Cessation
- 1968-01-10 BE BE709143D patent/BE709143A/xx unknown
- 1968-01-10 CH CH31868A patent/CH529239A/de not_active IP Right Cessation
- 1968-01-10 SU SU1210424A patent/SU381233A3/ru active
- 1968-01-10 GB GB0489/68A patent/GB1216883A/en not_active Expired
Also Published As
| Publication number | Publication date |
|---|---|
| AT303951B (de) | 1972-12-27 |
| IL29206A (en) | 1971-04-28 |
| CH529239A (de) | 1972-10-15 |
| DK132340B (da) | 1975-11-24 |
| SU381233A3 (en, 2012) | 1973-05-15 |
| DE1794328B2 (de) | 1976-09-09 |
| GB1216883A (en) | 1970-12-23 |
| NL144673B (nl) | 1975-01-15 |
| FR1583192A (en, 2012) | 1969-10-24 |
| ES348990A1 (es) | 1969-08-16 |
| DK132340C (da) | 1976-04-26 |
| NL6800315A (en, 2012) | 1968-07-11 |
| US3416302A (en) | 1968-12-17 |
| SE325100B (en, 2012) | 1970-06-22 |
| BE709143A (en, 2012) | 1968-07-10 |
| DE1794328A1 (de) | 1971-08-12 |
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