CN1121341A - 磁盘内衬材料 - Google Patents
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Abstract
本发明公开了一种软盘内衬，该内衬是由一种或多种胶乳粘合的无纺纤维形成的。形成内衬的纤维可以是由纤维素性材料、热塑性材料或这二种材料组合而形成的。内衬的至少一个表面上具有许多个并未贯穿内衬的凹槽。凹槽的表面积不小于内衬的表面积的15％。
Description
发明背景
本发明涉及用于生产软盘组件的无纺内衬组合物。
磁介质可用于以计算机可读形式贮存数据和其它信息。该介质通常以软盘形式使用，并包封在磁盘盘套中。盘套通常采用与磁盘接触的纤维材料作为内衬材料。该纤维材料或内衬材料用来保护磁盘免受灰尘和其它的碎屑的损害和污染。内衬的另一个作用是从磁盘上清除污染物。
灰尘和其它的污染物可能引起遗失错误，信息不能从磁盘读取或不能向磁盘写入，或者不能正确地从磁盘读取或不能正确地向磁盘写入。盘套构成基本密封的保持磁盘的环境。盘套使大部分的灰尘和碎屑颗粒不能进入盘套的内部而与磁盘接触。然而，某些灰尘或其它碎屑的颗粒仍能找到某种途径进入磁盘，内衬的作用是除去这些颗粒。进而，内衬提供较小的磨擦表面，从而在使用时，随着磁盘转动，接触并保护磁盘。
大多数的软盘的内衬是用无纺织物生产的，但用于生产内衬的材料及内衬的结构可有许多种。通常用于生产无纺内衬材料的是人造丝、聚酯和其它的聚合纤维。
形成无纺织物的纤维可通过不同的方式粘合在一起。常规的粘合方法是热粘合法，该方法是将热能施加于各个位置上以使单个的纤维熔化在一起，从而形成内衬。另一类常规的粘合技术是胶乳粘合或化学粘合，该方法是将聚合物胶乳或乳液施加于纤维网上以形成内衬。美国专利4414597、4586606和4655348公开了各种通过热粘合方法形成的磁盘内衬材料。美国专利4998176、5060105和5122919公开了各种通过化学粘合与热粘合方法相结合而形成的磁盘内衬材料。
胶乳或化学粘合的内衬是理想的，它们损坏磁盘及在软盘组件内形成磁介质的碎屑的可能较小。但这种内衬的缺点或至少从外观的角度看其缺点是它们相对较硬。胶乳或化学粘合的内衬也具有相对更高的孔隙度。结果，它们可能难于通过真空或吸力将内衬转移至磁盘盘套上的自动控制磁盘组装线上。由于该种内衬的透气性相当高，因而难于采用吸力来固定或转移内衬。因此，既能保持所希望的胶乳或化学粘合的内衬的性能又改进它们的外观并使它们更适宜于在自动控制磁盘组装线上使用是最可取的。
相应地，本发明的目的是提供一种降低了刚性的化学粘合的无纺磁盘内衬。本发明的另一个目的是提供一种显著降低了透气性的化学粘合的无纺磁盘内衬。本发明的另一个目的是提供一种可有效地清洁并保护软盘组件内的磁介质的化学粘合的无纺磁盘内衬。通过阅读下述内容，本发明的其它目的对本领域的技术人员来讲是非常明显的。发明的概述
本发明包含用作软盘的内衬材料，该内衬材料是由化学粘合的无纺织物形成的。本发明的内衬与类似的化学粘合的无纺内衬材料相比其刚性和透气性大为降低。
本发明的内衬优选包含用胶乳材料粘合在一起的人造纤维形成的无纺织物。胶乳材料通常约为内衬重量的10-35％。至少内衬的一面上具有许多个间隔开的永久性凹槽，这些凹槽并不贯穿内衬。凹槽的密度最好使凹槽的表面积应至少约为内衬的表面积的15％，更优选为15-20％。优选的是，用于形成内衬的纤维中至少一种为热塑性人造纤维。在一个实施方案中，内衬的纤维材料包含大约50-50的聚对苯二甲酸乙二醇酯与人造丝的掺合物。
以ASTM D737-75法测量，本发明的内衬材料的透气性优选为不大于约450立方英尺/分钟(cfm)。与未轧花的内衬材料比较，轧花的内衬材料的刚性通常降低大于40％。附图说明
图1示出了在软盘组件中显示的本发明的内衬。
图2为本发明内衬材料的顶视图。
图3为本发明内衬材料的剖视图。发明的详细描述
图1示出了现有技术中公知的一种软盘组件10。该组件10包括一个盘套12，该盘套保护并包封可旋转的磁介质盘14。内衬16固定于上下盘套12的内表面上，并邻近盘14的每一边。
内衬16的作用是保护磁盘及清除盘套内磁盘旋转时磁盘表面的碎屑。本发明的内衬的优点在于内衬的清洁性能，内衬的刚性降低及透气性降低。
本发明的内衬16由化学粘合的无纺织物构成，而该织物是通过一种或多种类型的非人造纤维形成的。纤维可以是热塑性的、非热塑性的或为热塑性纤维与非热塑性纤维的混合物。如图2和图3所示，内衬16的一个表面18，优选面对磁盘的表面，以许多个不贯穿内衬的凹槽20为其特征。在一种优选实施方案中，内衬的凹槽的面积至少约为内衬表面积的15％。无纺织物网优选用胶乳材料粘接。胶乳粘合材料优选约为内衬重量的10-35％。
虽然附图说明只是针对5.25英寸的软盘，但可以理解，本发明的内衬材料可用于其它尺寸的磁盘，特别是3.5英寸的磁盘。
用于形成内衬的纤维可由非热塑性材料形成，这些材料包括人造丝、棉花、木材及其它纤维素性纤维。用于生产内衬的热塑性纤维包括聚酯、尼龙和丙烯酸酯。如上所述，织物可由纤维掺合而形成，包括热塑性纤维与非热塑性纤维的掺合物。优选的纤维掺合物为人造丝与聚对苯二甲酸乙二醇酯以约50∶50的掺合物。
如上所述，粘合剂可以为胶乳，包括：丁苯橡胶、丁腈橡胶、乙烯乙酸乙烯酯、乙烯-氯乙烯、丙烯酸共聚物、聚乙酸乙烯酯、聚乙烯醇、聚酯和弹性材料。粘合剂优选约为内衬重量的10-35％，更优选约为12-17％。粘合剂制剂也可包含各种发泡剂、抗静电剂、pH控制剂及其它的公知的加工助剂。
优选的粘合材料为含约46％苯乙烯的丁苯橡胶。
内衬可以按照现有技术中公知的各种方法生产。优选采用干法成网工艺，该方法包括：将纤维打开并掺合，随后将纤维梳理。然后将胶乳粘合剂涂于纤维网上，使该材料通过平滑的轧光辊筒。轧光辊筒的施加压力约为500-700psi，温度保持在约22-50℃。以后使内衬通过具有预定凹槽图案的轧花辊筒，将所说的图案转移至内衬上。该轧花辊筒的工作压力优选保持在约50-100KN/mm，但该值可以按照所用的轧花辊筒进行变化。为了避免纤维或粘合剂熔化，轧花辊筒的温度应保持低于用于形成内衬的热塑性材料的熔点。例如，对于人造丝/聚对苯二甲酸乙二醇酯纤维掺合物而言，由于聚对苯二甲酸乙二醇酯的熔点约为250℃，因此，轧花辊筒的温度应为约160-180℃。本领域的技术人员易于理解，轧花辊筒的温度可以控制厚度偏差，透气性及纤维的刚性。
施加于软盘盘套上的内衬的尺寸在现有技术中是公知的，其变化取决于软盘组件的尺寸。内衬材料的厚度也可以变化，从某种程度上讲受轧光压力和轧花压力的控制。由ASTM D1777测试法测得的内衬的厚度约为5-12密尔。内衬的厚度最好在整个内衬宽度内基本相同。
据信，本发明的内衬中形成的凹槽的作用是增加了内衬厚度内的均匀度。由ASTM D1777测得的厚度优选在整个内衬内恒定在±1.0密尔之内。据信，与类似组成的无任何凹槽的内衬比较，凹槽的作用也是显著地降低内衬的刚性，不小于约40％。以ASTM D138 8-64(A方案)测得的内衬的刚性优选约为400-1200mg.cm。类似组成的无凹槽的内衬其刚性的常规范围为约1250-2000mg.cm。
本发明的内衬的透气性与类似构成的无凹槽的内衬的透气性相比有显著的降低。这种对内衬材料的改进能使内衬有效地由磁盘组件内的真空力操作。以ASTM D737-75法进行测量，本发明的内衬材料的透气性最好不大于450立方英尺/分钟(cfm)。类似构成但不包含凹下图案的内衬其孔隙度为约400-500cfm。内衬的孔隙度的降低可以是相当大的，由于其改善了使用自动控制组装以生产磁盘的能力，同时可显著地降低在自动控制组装中内衬的次品率。
由轧花辊筒形成的凹槽可有多种形状和图案。凹槽的表面积应至少约为内衬的表面积的15％，更优选为15-20％。最优选的凹槽的图案为菱形，但也可使用其它形状的凹槽。凹槽的深度并不重要，只要凹槽不贯穿或破坏内衬即可。
通过下述实施例进一步说明本发明。实施例
按照已知的生产技术制备各种无纺织物内衬材料。大约一半的内衬按照本发明进行轧花处理，以使通过轧花形成的凹槽的总表面积约为内衬表面积的20％。将这些内衬与未轧花但其它相同的内衬进行比较，以评价厚度偏差、透气性和刚性。各种内衬的组成如下：内衬 组成A 50/50的人造丝(1.5旦)和聚酯(1.0旦)的掺合物与
丁苯橡胶粘合剂(85％(重)的纤维，15％(重)的粘合剂)B 50/50的人造丝(1.5旦)和聚酯(1.0旦)的掺合物与
丁苯橡胶粘合剂(85％(重)的纤维，15％(重)的粘合剂)C 50/50的人造丝(1.5旦)和聚酯(1.0旦)的掺合物与
丁苯橡胶粘合剂(85％(重)的纤维，15％(重)的粘合剂)D 50/50的人造丝(1.5旦)和聚酯(1.0旦)的掺合物与
丁苯橡胶粘合剂(85％(重)的纤维，15％(重)的粘合剂)E 75/25的聚酯(1.0旦)和人造丝(1.5旦)的掺合物与
丁苯橡胶粘合剂(85％(重)的纤维，15％(重)的粘合剂)F 50/50的人造丝(1.5旦)和聚酯(1.5旦)的掺合物与
丁苯橡胶粘合剂(85％(重)的纤维，15％(重)的粘合剂)
比较试验的结果列于表1-3。
表1
厚度偏差(密尔)
(ASTN D1777)
无凹槽 有凹槽内衬 平均 标准偏差 内衬 平均 标准偏差A 9.3 .45 A 9.1 .29B 8.9 .39 B 8.8 .23C 8.0 .48 C 7.7 .20D 7.0 .35 D 7.2 .30E 6.5 .35 E 6.4 .21F 7.8 .35 F 7.7 .25
表2
透气性(CFM)
(ASTM D737-35)
无凹槽 有凹槽内衬 平均 内衬 平均A 370 A 300B 375 B 330C 390 C 370D 455 D 420E 470 E 420F 495 F 455
表3
抗挠刚度(刚性，mg.cm.)
(ASTM D1388-64(A))
无凹槽 有凹槽内衬 平均 内衬 平均A 2000 A 1150B 1850 B 800C 1500 C 500可以理解，各种变化均在本发明的保护范围之内。除另有
说明，所有的百分数均为重量百分数。
Claims (15)
1.一种用于软盘形成内衬的内衬材料，包含：
一种与胶乳材料粘合在一起的人造纤维形成的无纺织物，胶乳材料至少约为组合物重量的10-35％，内衬的至少一面上具有许多个间隔开的永久性凹槽，凹槽的密度最好使凹槽的表面积应至少约为内衬的表面积的15％。
2.按照权利要求1的内衬，其中以ASTM D737-35测试法测得的内衬的透气性不大于约450立方英尺/分钟。
3.按照权利要求2的内衬，其中内衬的机械方向硬度不大于1200mg.cm。
4.按照权利要求2的内衬，其中内衬的厚度为约5-12密尔。
5.按照权利要求4的内衬，其中内衬的厚度基本恒定在±1.0密尔之内。
6.按照权利要求1的内衬，其中人造纤维为人造丝。
7.按照权利要求1的内衬，其中人造纤维至少包括一种热塑性材料。
8.按照权利要求7的内衬，其中纤维材料包含约50/50的聚对苯二甲酸乙二醇酯和人造丝的掺合物。
9.按照权利要求1的内衬，其中胶乳粘合剂包含含有46％苯乙烯的丁苯橡胶。
10.一种磁盘，包括：
一个盘套；
一个可旋转的磁盘；和
一种固定于所述盘套面对磁盘的两表面上的内衬，该内衬包含一种由与胶乳材料粘合在一起的人造纤维形成的无纺织物，胶乳材料至少约为组合物重量的10-35％，内衬的至少一面上具有许多个间隔开的永久性凹槽，凹槽的密度最好使凹槽的表面积应至少约为内衬的表面积的15％。
11.按照权利要求10的记录介质，其中以ASTM D737-35测试法测得的内衬的透气性不大于约450立方英尺/分钟。
12.按照权利要求11的记录材料，其中内衬的机械方向硬度不大于1200mg.cm。
13.按照权利要求11的记录材料，其中以ASTM D1777测试法测得的内衬的厚度为约5-12密尔。
14.按照权利要求13的记录材料，其中内衬的厚度基本恒定在±1.0密尔之内。
15.一种用于软盘的无纺织物内衬的生产方法，该方法包括：
形成一个纤维网；
将该纤维网与重量百分数约为10-35％的胶乳粘合材料粘合在一起以形成内衬；
在压力约为500-700psi，温度约为22-50℃下，使该内衬轧光；和
使内衬通过具有预定凹槽图案的轧花辊筒，将所说的图案施加至内衬的一面上，轧花辊筒的温度应大大低于在纤维网中任一种热塑性纤维的熔点，该轧花辊筒的工作压力约为50-100KN/mm。
Applications Claiming Priority (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| US08/026,438 US5455109A (en) | 1993-04-20 | 1993-04-20 | Disk lining material |
| US08/026,438 | 1993-04-20 |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN1121341A true CN1121341A (zh) | 1996-04-24 |
| CN1042914C CN1042914C (zh) | 1999-04-14 |
Family
ID=21831823
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN94191851A Expired - Fee Related CN1042914C (zh) | 1993-04-20 | 1994-01-04 | 磁盘内衬材料 |
Country Status (11)
| Country | Link |
|---|---|
| US (2) | US5455109A (zh) |
| EP (1) | EP0695270B1 (zh) |
| JP (1) | JPH08511892A (zh) |
| KR (1) | KR100299584B1 (zh) |
| CN (1) | CN1042914C (zh) |
| AT (1) | ATE190426T1 (zh) |
| AU (1) | AU5989294A (zh) |
| CA (1) | CA2160897C (zh) |
| DE (1) | DE69423349T2 (zh) |
| ES (1) | ES2142933T3 (zh) |
| WO (1) | WO1994024022A1 (zh) |
Families Citing this family (13)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US6317292B1 (en) | 1994-10-18 | 2001-11-13 | Iomega Corporation | PTFE fiber based liner for flexible high density magnetic media |
| EP0854484B1 (en) * | 1994-10-18 | 2002-05-08 | Iomega Corporation | Disk cartridge with fuzzed liner |
| US5582901A (en) * | 1994-12-05 | 1996-12-10 | International Paper Company | Multi-layered diskette liner |
| JPH08221930A (ja) * | 1995-02-17 | 1996-08-30 | Fuji Photo Film Co Ltd | 磁気ディスクカートリッジおよびその製造方法 |
| SE0000174L (sv) * | 2000-01-21 | 2001-08-20 | Fiberduk Ab | Förfarande för framställning av fibrerduk samt fiberduk framställd därigenom och förfarande för framställning av en skiktkomposit samt skiktkompositen framställd därigenom |
| US20030017287A1 (en) * | 2001-06-19 | 2003-01-23 | Fuji Photo Film Co., Ltd. | Disk container |
| JP2004110928A (ja) * | 2002-09-18 | 2004-04-08 | Fuji Photo Film Co Ltd | ディスクカートリッジ |
| JP2004164770A (ja) * | 2002-11-14 | 2004-06-10 | Fuji Photo Film Co Ltd | 磁気ディスク媒体 |
| US8083828B2 (en) * | 2009-06-19 | 2011-12-27 | Hollingsworth & Vose Company | Fiber web having a high stiffness |
| CN109072516B (zh) | 2015-11-12 | 2022-01-25 | Pf非织造布有限公司 | 具有提高的耐磨性的非织造物及其制造方法 |
| US10252200B2 (en) | 2016-02-17 | 2019-04-09 | Hollingsworth & Vose Company | Filter media including a filtration layer comprising synthetic fibers |
| US11014030B2 (en) | 2016-02-17 | 2021-05-25 | Hollingsworth & Vose Company | Filter media including flame retardant fibers |
| USD833759S1 (en) * | 2017-05-19 | 2018-11-20 | Pfnonwovens Llc | Nonwoven fabric with a surface pattern |
Family Cites Families (19)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS53110513A (en) * | 1977-03-08 | 1978-09-27 | Fuji Photo Film Co Ltd | Disc jacket for magnetic recording |
| GB2008307B (en) * | 1977-11-16 | 1982-05-19 | Hitachi Maxell | Magnetic recording medium |
| US4405325A (en) * | 1981-08-03 | 1983-09-20 | The B. F. Goodrich Company | Hydrophobic nonwoven fabric bonded by a copolymer formed from a diene |
| US4414597A (en) * | 1981-09-14 | 1983-11-08 | Chicopee | Floppy disc liner |
| US4586606B1 (en) * | 1983-10-28 | 1998-01-06 | Int Paper Co | Nonwoven fabric |
| US4610352A (en) * | 1983-10-28 | 1986-09-09 | The Kendall Company | Nonwoven fabric |
| JPS60113375A (ja) * | 1983-11-24 | 1985-06-19 | Mitsubishi Plastics Ind Ltd | フロツピ−デイスクジヤケツト |
| JPS61132664A (ja) * | 1984-11-27 | 1986-06-20 | 日本バイリーン株式会社 | ポリビニルアルコ−ル系繊維を含む不織布の製造方法 |
| KR940005563B1 (ko) * | 1985-03-14 | 1994-06-20 | 히다찌 마구세루 가부시기가이샤 | 디스크 카아트리지 |
| JPH0418130Y2 (zh) * | 1985-10-19 | 1992-04-22 | ||
| JPS63184977A (ja) * | 1987-01-28 | 1988-07-30 | Hitachi Maxell Ltd | デイスクカ−トリツジ |
| US4845583A (en) * | 1987-05-07 | 1989-07-04 | Bonar Fabrics Corporation | Record diskette or disk jackets lined with powder bonded nonwoven fabrics |
| US4812938A (en) * | 1987-06-18 | 1989-03-14 | Rogers Randall J | Floppy disk liner with improved cleaning ability |
| JPH01146375U (zh) * | 1988-03-31 | 1989-10-09 | ||
| EP0386291B1 (en) * | 1989-03-08 | 1995-01-25 | Mitsubishi Rayon Co., Ltd. | Liner for floppy disk and process for producing the same |
| JP2727242B2 (ja) * | 1989-10-18 | 1998-03-11 | 三菱レイヨン株式会社 | フロッピーディスクジャケット用ライナー |
| US5060105B1 (en) * | 1990-04-16 | 1996-12-03 | Int Paper Co | Hybrid nonwoven diskette liner |
| US5317467A (en) * | 1990-05-21 | 1994-05-31 | Hitachi Maxell, Ltd. | Data recording cartridge including a flexible magnetic recording medium |
| JP2990446B2 (ja) * | 1991-02-05 | 1999-12-13 | 富士写真フイルム株式会社 | 磁気記録ディスク |
-
1993
- 1993-04-20 US US08/026,438 patent/US5455109A/en not_active Expired - Lifetime
-
1994
- 1994-01-03 ES ES94906000T patent/ES2142933T3/es not_active Expired - Lifetime
- 1994-01-03 KR KR1019950704567A patent/KR100299584B1/ko not_active IP Right Cessation
- 1994-01-03 DE DE69423349T patent/DE69423349T2/de not_active Expired - Fee Related
- 1994-01-03 JP JP6523109A patent/JPH08511892A/ja active Pending
- 1994-01-03 CA CA002160897A patent/CA2160897C/en not_active Expired - Fee Related
- 1994-01-03 EP EP94906000A patent/EP0695270B1/en not_active Expired - Lifetime
- 1994-01-03 AT AT94906000T patent/ATE190426T1/de not_active IP Right Cessation
- 1994-01-03 AU AU59892/94A patent/AU5989294A/en not_active Abandoned
- 1994-01-03 WO PCT/US1994/000045 patent/WO1994024022A1/en active IP Right Grant
- 1994-01-04 CN CN94191851A patent/CN1042914C/zh not_active Expired - Fee Related
-
1995
- 1995-06-01 US US08/456,475 patent/US5650898A/en not_active Expired - Fee Related
Also Published As
| Publication number | Publication date |
|---|---|
| ES2142933T3 (es) | 2000-05-01 |
| EP0695270B1 (en) | 2000-03-08 |
| DE69423349D1 (de) | 2000-04-13 |
| KR100299584B1 (ko) | 2002-08-27 |
| JPH08511892A (ja) | 1996-12-10 |
| US5455109A (en) | 1995-10-03 |
| CA2160897C (en) | 2002-08-20 |
| EP0695270A4 (en) | 1997-12-10 |
| WO1994024022A1 (en) | 1994-10-27 |
| US5650898A (en) | 1997-07-22 |
| AU5989294A (en) | 1994-11-08 |
| CA2160897A1 (en) | 1994-10-27 |
| ATE190426T1 (de) | 2000-03-15 |
| EP0695270A1 (en) | 1996-02-07 |
| KR960701788A (ko) | 1996-03-28 |
| DE69423349T2 (de) | 2000-07-27 |
| CN1042914C (zh) | 1999-04-14 |
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