CN1046119A - 聚四氟乙烯单轴向拉伸成型制品 - Google Patents
聚四氟乙烯单轴向拉伸成型制品 Download PDFInfo
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- B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
- B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
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- D01F6/00—Monocomponent artificial filaments or the like of synthetic polymers; Manufacture thereof
- D01F6/02—Monocomponent artificial filaments or the like of synthetic polymers; Manufacture thereof from homopolymers obtained by reactions only involving carbon-to-carbon unsaturated bonds
- D01F6/08—Monocomponent artificial filaments or the like of synthetic polymers; Manufacture thereof from homopolymers obtained by reactions only involving carbon-to-carbon unsaturated bonds from polymers of halogenated hydrocarbons
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- B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
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- B29K2027/00—Use of polyvinylhalogenides or derivatives thereof as moulding material
- B29K2027/12—Use of polyvinylhalogenides or derivatives thereof as moulding material containing fluorine
- B29K2027/18—PTFE, i.e. polytetrafluorethene, e.g. ePTFE, i.e. expanded polytetrafluorethene
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- C08J2327/00—Characterised by the use of homopolymers or copolymers of compounds having one or more unsaturated aliphatic radicals, each having only one carbon-to-carbon double bond, and at least one being terminated by a halogen; Derivatives of such polymers
- C08J2327/02—Characterised by the use of homopolymers or copolymers of compounds having one or more unsaturated aliphatic radicals, each having only one carbon-to-carbon double bond, and at least one being terminated by a halogen; Derivatives of such polymers not modified by chemical after-treatment
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Abstract
为了制备聚四氟乙烯(PTFE)单轴向拉伸成型制品,将含有PTFE粉末的糊料物连续成型为成型物,它送经多组辊或辊,加热并拉伸。在进行拉伸前,成型物加热至327~450℃,同时烧结,然后拉伸。该方法制成的PTFE单轴向拉伸成型制品在拉伸方向强度至少为500N/mm2,密度为1.80~2.30g/cm3。
Description
本发明是关于聚四氟乙烯(PTFE)的单轴向拉伸制品,及其它们的制备方法。
由于聚四氟乙烯的热稳定剂和它的化学惰性,它是一种受赞赏的材料。但是,在某些领域它的应用有局限性,因为人们还不能成功地制成具有高机械强度和同时有高密度的PTFE成型制品。
例如,如果将这种材料加工成纺织纱,它可以加工成特别耐磨的PTFE织物。优异的强度和高密度的综合性能也有利于用做包裹导电体,介电击穿强度随着密度而提高。
目前,市场上可购得具有强度至多250N/mm2的PTFE成型制品,但它们的密度低于1g/cm3。这类成型制品是用拉伸没有烧结的PTFE而制成的。另一方面,至今已知烧结后PTFE成型制品的密度约为2g/cm3,但是强度不超过约50N/mm2。
从AT-B 370 674可知烧结的PTFE单轴拉伸膜,拉伸方向的强度为50N/mm2~140N/mm2。这类膜的制备是首先将PTFE粉末压成圆柱状成型制品,然后,烧结成型制品,再从上剥离成薄膜,至少加热到327℃并拉伸。
GB-A-2 025 835公开了按照糊料挤塑方法制备多孔PTFE成型制品的方法,该方法包括将基本上含有PTFE粉末和润滑剂的糊料物加压通过喷丝器,然后干燥除去润滑剂。其后,将成型制品加热至PTFE结晶熔点(327℃)以上并在加热过程中拉伸。拉伸比越大,所得成型制品的强度越大。但是,随之成型制品的密度降低了,例如拉伸率为550%时,强度升至约为42N/mm2,而密度降为约0.4g/cm3。
本发明的目的是提供一种PTFE成型制品,它没有上述的缺点,但具有高的机械强度和高密度。
本发明的PTFE制品是单轴向拉伸的,拉伸方向的强度至少为500N/mm2,最好至少为700N/mm2,密度为1.80~2.30g/cm3,最好为2.00~2.20g/cm3,成型制品较好为薄膜、带材、纺织纱或缝纫纱。在指出的强度值,纱的伸长率为3%~50%。
本发明的单轴向拉伸PTFE成型制品的制备是将含有PTFE粉末的糊料物连续制成成型物,将成型物送经多辊或辊,加热并拉伸成型物,在拉伸之前加热成型物至327~450℃,最好为350~390℃,这样烧结,然后拉伸。
本发明方法的较好实施方案是在加热为327~450℃,最好为350~390℃的辊或一对辊与未加热的引出装置间拉伸成型物。
它具有的拉伸比为1∶5~1∶30,最好为1∶10~1∶20。当拉伸比为1∶30时,得到的强度大约为1150N/mm2。
本发明方法的实施方案将由附图来更详细地说明。
首先,以已知的方法将PTFE粉末与润滑剂混合,并在20~50℃下贮存几小时,再在压力为10~50巴下加工成型物。然后用已知方法将制成的成型物通过单孔喷丝器挤成棒状,并滚压成薄膜,干燥除去润滑剂。
然后,这种干燥的薄膜连续地送入附图所示的烧结和拉伸设备中。该设备的基本组成是送料器1,两个加热辊3′、3″和未加热的引出装置4,在附图的箭头是加热辊3′、3″的转动方向和薄膜的拉动方向。
经送料器1输入的薄膜连续地经过加热的辊3′、3″,并在此烧结。为此,为了能使薄膜从两面加热,薄膜最好是像“S”形包卷在辊上。辊子已经加热到至少327℃。烧结后,薄膜立即拉伸。薄膜由附图上标示的由几个卷滚组成的未加热引出装置4拉出。最后,拉伸过的料缠绕在合适的卷料筒上。
为了生产带材,干燥的薄膜较好是当通过送料器1时,已经用切刀杆装置切开。
本发明将用下列实例更详细地说明。
实例1
将100份PTFE乳液粉末和23份汽油(沸点为186~214℃)压成圆柱棒,压延成厚度为0.1mm薄膜并干燥。然后,将该薄膜送入送料器1,切成6mm宽的带子,经已加热至380℃的辊3′、3″,同时被烧结,并用这组辊以1∶15的拉伸比拉伸。所得的带材在伸长率为5.6%时的强度为835N/mm2,密度为2.12g/cm3。
初始厚度降为0.0236mm,宽度为1.4mm。
所得PTFE带材可加工成纺织纱(加拈的或不加拈的)和缝纫纱(双拈的)。
实例2
将按照实例1压成棒的PTFE,辊压成0.114mm厚的薄膜并干燥。该薄膜经已加热到375℃的辊3′、3″,宽度为200mm,同时被烧结。烧结时立即以拉伸比为1∶15进行拉伸。在伸长率为7.5%时,所得薄膜的强度为692N/mm2,密度为2.17g/cm3,介电击穿强度为190KV/mm。薄膜的宽度为46.6mm,厚度为0.024mm。
该薄膜无孔,具有较好的滑动特性和优异的电绝缘性,它特别适用于包裹导电体。
实例3
将如实例1所述方法压成棒状的PTFE再辊成0.05mm厚的薄膜并干燥。将该薄膜切成宽为25mm的带子,经已加热到385℃的辊,同时烧结。接着,以1∶15的拉伸比拉伸,可是得到伸长率为5.6%时的薄膜强度为703N/mm2,密度为1.93g/cm3。该薄膜的宽度为5.8mm,厚度为0.013mm。
Claims (5)
1、一种聚四氟乙烯(PTFE)单相向拉伸的成型制品,该制品在拉伸方向的强度至少为500N/mm2,最好至少为700N/mm2,密度为1.80~2.30g/cm3,最好为2.00~2.20g/cm3。
2、如权利要求1的单轴向拉伸的成型制品,将它制成薄膜、带材、纺织纱成缝纫纱。
3、一种制备如权利要求1的单轴拉伸成型制品的方法,该方法包括将含PTFE粉末的糊料物连续制成成型物,将成型物送经多组辊或辊,加热并拉伸成型物,其特征在于在拉伸之前将成型物加热至327~450℃,最好为350~390℃,因此被烧结,然后拉伸。
4、如权利要求3的方法,其特征在于成型物是在加热到327~450℃,最好为350~390℃的辊或一对辊(3′、3″)与未加热的引出装置(4)间被拉伸。
5、如权利要求3或4的方法,其特征在于成型物的拉伸率为1∶5~1∶30,最好为1∶10~1∶20。
Applications Claiming Priority (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
AT0081389A AT391473B (de) | 1989-04-06 | 1989-04-06 | Monoaxial verstreckter formkoerper aus polytetrafluoraethylen und verfahren zu seiner herstellung |
ATA813/89 | 1989-04-06 |
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CN1046119A true CN1046119A (zh) | 1990-10-17 |
CN1028160C CN1028160C (zh) | 1995-04-12 |
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Application Number | Title | Priority Date | Filing Date |
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CN90101999A Expired - Lifetime CN1028160C (zh) | 1989-04-06 | 1990-04-06 | 聚四氟乙烯单轴向拉伸成型制品的制备方法 |
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US (1) | US5167890A (zh) |
EP (1) | EP0391887B1 (zh) |
JP (1) | JP2913062B2 (zh) |
KR (1) | KR0178032B1 (zh) |
CN (1) | CN1028160C (zh) |
AT (2) | AT391473B (zh) |
AU (1) | AU639912B2 (zh) |
BR (1) | BR9001696A (zh) |
CA (1) | CA2013122A1 (zh) |
DD (1) | DD293305A5 (zh) |
DE (1) | DE59009267D1 (zh) |
ES (1) | ES2075192T3 (zh) |
FI (1) | FI98349C (zh) |
HU (1) | HU212430B (zh) |
IE (1) | IE62562B1 (zh) |
IL (1) | IL93836A (zh) |
RU (1) | RU1839674C (zh) |
UA (1) | UA11068A (zh) |
YU (1) | YU67490A (zh) |
ZA (1) | ZA902390B (zh) |
Cited By (12)
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CN1055431C (zh) * | 1993-07-30 | 2000-08-16 | 连津格股份公司 | 聚四氟乙烯模塑制品及其制备方法 |
CN1065929C (zh) * | 1993-11-03 | 2001-05-16 | 连津格股份公司 | 由聚四氟乙烯制成的单轴拉伸模制品 |
CN1082103C (zh) * | 1994-06-30 | 2002-04-03 | 大金工业株式会社 | 膨松聚四氟乙烯长纤维及裂膜丝、其制造方法、使用其制造棉状物的方法及集尘用滤布 |
CN1961030B (zh) * | 2004-04-23 | 2010-05-26 | 戈尔企业控股股份有限公司 | 含氟聚合物屏障材料 |
CN103770351A (zh) * | 2014-02-25 | 2014-05-07 | 韩玉新 | 一种聚四氟乙烯薄膜带加工工艺 |
CN105648556A (zh) * | 2014-10-31 | 2016-06-08 | 陈路 | 一种用于制造ptfe缝纫线的拉丝机 |
CN105887221A (zh) * | 2014-10-31 | 2016-08-24 | 陈路 | 一种用于制造ptfe缝纫线的多辊牵伸装置 |
CN108728978A (zh) * | 2018-05-05 | 2018-11-02 | 灵氟隆新材料科技江苏有限公司 | 一种荧光聚四氟乙烯缝纫线的制备方法 |
CN109203525A (zh) * | 2018-08-29 | 2019-01-15 | 山东东岳高分子材料有限公司 | 一种高强度聚四氟乙烯薄膜的制造工艺 |
CN110528131A (zh) * | 2019-09-20 | 2019-12-03 | 常州华福环境科技股份有限公司 | 一种高强度低摩擦聚四氟乙烯缝纫线的制造工艺 |
CN110629303A (zh) * | 2019-09-20 | 2019-12-31 | 常州华福环境科技股份有限公司 | 一种高强度低伸长聚四氟乙烯超细长丝的制造工艺 |
CN113195187A (zh) * | 2018-11-15 | 2021-07-30 | 山勝实验室有限公司 | 未烧结聚四氟乙烯薄膜及其多孔膜的制备方法 |
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CA2155324C (en) * | 1993-02-18 | 1999-03-16 | Layne L. Moen | Macroscopically perforated porous polytetrafluoroethylene materials |
DE69415627T2 (de) * | 1993-04-05 | 1999-06-17 | Daikin Industries, Ltd., Osaka | Polytetrafluorethylenfaser, baumwollartiges, diese faser enthaltendes material, und verfahren zu deren herstellung |
AT401271B (de) * | 1993-07-08 | 1996-07-25 | Chemiefaser Lenzing Ag | Verfahren zur herstellung von cellulosefasern |
JP3077534B2 (ja) * | 1994-05-31 | 2000-08-14 | 日立電線株式会社 | ポリテトラフルオロエチレンの高強度繊維及びその製造方法 |
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DE102007032156A1 (de) | 2007-07-03 | 2008-10-23 | Aesculap Ag | Textile Gefäßprothese |
US20090195951A1 (en) * | 2008-02-05 | 2009-08-06 | Bart Sorgeloos | Method and Apparatus for Improved Electrostatic Discharge Protection |
WO2010065949A1 (en) * | 2008-12-05 | 2010-06-10 | E. I. Du Pont De Nemours And Company | Filter media with nanoweb layer |
JP6203639B2 (ja) | 2011-01-28 | 2017-09-27 | メリット・メディカル・システムズ・インコーポレイテッドMerit Medical Systems,Inc. | 電界紡糸されたptfeでコーティングされたステントおよび使用方法 |
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CN105887215A (zh) * | 2014-10-31 | 2016-08-24 | 陈路 | 一种挤出法制造ptfe缝纫线的工艺 |
CN105887225A (zh) * | 2014-10-31 | 2016-08-24 | 陈路 | 一种用于制造ptfe缝纫线的膜裂牵伸装置 |
CN107205346A (zh) | 2015-02-02 | 2017-09-26 | 纳幕尔杜邦公司 | 灌溉管中的根系入侵改善 |
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-
1989
- 1989-04-06 AT AT0081389A patent/AT391473B/de active
-
1990
- 1990-03-21 IL IL93836A patent/IL93836A/xx not_active IP Right Cessation
- 1990-03-26 US US07/499,033 patent/US5167890A/en not_active Expired - Lifetime
- 1990-03-26 IE IE109990A patent/IE62562B1/en not_active IP Right Cessation
- 1990-03-27 CA CA002013122A patent/CA2013122A1/en not_active Abandoned
- 1990-03-28 ZA ZA902390A patent/ZA902390B/xx unknown
- 1990-03-29 HU HU901892A patent/HU212430B/hu not_active IP Right Cessation
- 1990-03-29 AU AU52402/90A patent/AU639912B2/en not_active Ceased
- 1990-04-03 JP JP2090061A patent/JP2913062B2/ja not_active Expired - Lifetime
- 1990-04-03 EP EP90890096A patent/EP0391887B1/de not_active Expired - Lifetime
- 1990-04-03 DE DE59009267T patent/DE59009267D1/de not_active Expired - Lifetime
- 1990-04-03 FI FI901689A patent/FI98349C/fi not_active IP Right Cessation
- 1990-04-03 AT AT90890096T patent/ATE123993T1/de not_active IP Right Cessation
- 1990-04-03 ES ES90890096T patent/ES2075192T3/es not_active Expired - Lifetime
- 1990-04-04 BR BR909001696A patent/BR9001696A/pt not_active IP Right Cessation
- 1990-04-05 UA UA4743609A patent/UA11068A/uk unknown
- 1990-04-05 DD DD90339483A patent/DD293305A5/de not_active IP Right Cessation
- 1990-04-05 YU YU00674/90A patent/YU67490A/xx unknown
- 1990-04-05 RU SU904743609A patent/RU1839674C/ru active
- 1990-04-06 CN CN90101999A patent/CN1028160C/zh not_active Expired - Lifetime
- 1990-04-06 KR KR1019900004702A patent/KR0178032B1/ko not_active IP Right Cessation
Cited By (15)
Publication number | Priority date | Publication date | Assignee | Title |
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CN1055431C (zh) * | 1993-07-30 | 2000-08-16 | 连津格股份公司 | 聚四氟乙烯模塑制品及其制备方法 |
CN1065929C (zh) * | 1993-11-03 | 2001-05-16 | 连津格股份公司 | 由聚四氟乙烯制成的单轴拉伸模制品 |
CN1082103C (zh) * | 1994-06-30 | 2002-04-03 | 大金工业株式会社 | 膨松聚四氟乙烯长纤维及裂膜丝、其制造方法、使用其制造棉状物的方法及集尘用滤布 |
CN1961030B (zh) * | 2004-04-23 | 2010-05-26 | 戈尔企业控股股份有限公司 | 含氟聚合物屏障材料 |
CN103770351A (zh) * | 2014-02-25 | 2014-05-07 | 韩玉新 | 一种聚四氟乙烯薄膜带加工工艺 |
CN105887221A (zh) * | 2014-10-31 | 2016-08-24 | 陈路 | 一种用于制造ptfe缝纫线的多辊牵伸装置 |
CN105648556A (zh) * | 2014-10-31 | 2016-06-08 | 陈路 | 一种用于制造ptfe缝纫线的拉丝机 |
CN108728978A (zh) * | 2018-05-05 | 2018-11-02 | 灵氟隆新材料科技江苏有限公司 | 一种荧光聚四氟乙烯缝纫线的制备方法 |
CN109203525A (zh) * | 2018-08-29 | 2019-01-15 | 山东东岳高分子材料有限公司 | 一种高强度聚四氟乙烯薄膜的制造工艺 |
CN113195187A (zh) * | 2018-11-15 | 2021-07-30 | 山勝实验室有限公司 | 未烧结聚四氟乙烯薄膜及其多孔膜的制备方法 |
CN113195187B (zh) * | 2018-11-15 | 2022-11-15 | 重庆宝曼新材料有限公司 | 未烧结聚四氟乙烯薄膜及其多孔膜的制备方法 |
CN110528131A (zh) * | 2019-09-20 | 2019-12-03 | 常州华福环境科技股份有限公司 | 一种高强度低摩擦聚四氟乙烯缝纫线的制造工艺 |
CN110629303A (zh) * | 2019-09-20 | 2019-12-31 | 常州华福环境科技股份有限公司 | 一种高强度低伸长聚四氟乙烯超细长丝的制造工艺 |
CN110629303B (zh) * | 2019-09-20 | 2021-07-20 | 常州华福环境科技股份有限公司 | 一种高强度低伸长聚四氟乙烯超细长丝的制造工艺 |
CN110528131B (zh) * | 2019-09-20 | 2021-07-23 | 常州华福环境科技股份有限公司 | 一种高强度低摩擦聚四氟乙烯缝纫线的制造工艺 |
Also Published As
Publication number | Publication date |
---|---|
IE62562B1 (en) | 1995-02-08 |
IE901099L (en) | 1990-10-06 |
CA2013122A1 (en) | 1990-10-06 |
US5167890A (en) | 1992-12-01 |
IL93836A (en) | 1993-04-04 |
JPH02286220A (ja) | 1990-11-26 |
FI901689A0 (fi) | 1990-04-03 |
CN1028160C (zh) | 1995-04-12 |
HU212430B (en) | 1996-06-28 |
HUT62232A (en) | 1993-04-28 |
UA11068A (uk) | 1996-12-25 |
EP0391887B1 (de) | 1995-06-21 |
BR9001696A (pt) | 1991-05-14 |
ES2075192T3 (es) | 1995-10-01 |
JP2913062B2 (ja) | 1999-06-28 |
IL93836A0 (en) | 1990-12-23 |
KR0178032B1 (ko) | 1999-05-15 |
AU5240290A (en) | 1990-10-11 |
FI98349B (fi) | 1997-02-28 |
EP0391887A2 (de) | 1990-10-10 |
AT391473B (de) | 1990-10-10 |
KR900016326A (ko) | 1990-11-13 |
AU639912B2 (en) | 1993-08-12 |
DD293305A5 (de) | 1991-08-29 |
EP0391887A3 (de) | 1992-03-18 |
FI98349C (fi) | 1997-06-10 |
ATE123993T1 (de) | 1995-07-15 |
YU67490A (en) | 1991-10-31 |
RU1839674C (ru) | 1993-12-30 |
HU901892D0 (en) | 1990-07-28 |
DE59009267D1 (de) | 1995-07-27 |
ZA902390B (en) | 1990-12-28 |
ATA81389A (de) | 1990-04-15 |
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