CN1172031A - 防跑气用密封剂 - Google Patents
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Abstract
将防跑气用密封剂的纤维素纤维的含量减少,以降低成本,但仍能确保由纤维素纤维产生的高密封性。向内胎2内的空气室3相邻的密封剂室7内填充的封闭剂8由合成纤维和纤维素纤维混入溶媒内制成,混合比例为合成纤维占75~90%,纤维素纤维占25~70%。因封闭剂室7比空气室3小很多,故充填于其中的封闭剂8,并无因离心力而召致合成纤维分离之问题,所以只要含有堵塞大跑气孔所需的最小限度的纤维素纤维即可。可减少高价的纤维素纤维的含量从而降低成本。
Description
本发明涉及一种防跑气用密封剂,该密封剂装于内胎内部的与空气室相邻的密封剂室内。
现有的封闭剂,如特开昭50-72303号公后所载而众所周知的,是将含有纤维成分的密封剂装入汽车轮胎的内胎内,当此内胎受到钉子一类东西刺伤时,能用该密封剂修补上以防空气之泄漏。此类密封剂是在液体高分子物质或其水混合液内加进短纤维物质及纤维素微结晶粉末制成的。为了减少在内胎内短纤维物质之流动,掺进的纤维素微结晶粉末,其比率比短纤维物质之此率还大。
然而在上述密封剂上,制造者鉴于密封剂会在内胎内广为流动,因而使纤维素微结晶粉末的含量甚至比短纤维物质还多,这样,在里胎内短纤维物质的流动固然被抑制了,但由于纤维素微结晶粉末是由加工处理纤维素而成的,其造价比纤维素更高,故增加其含量意味着大幅度增加成本。
本发明是有鉴于上述情势而研究开发的,其目的在于减少纤维素纤维,从而降低成本的同时,确保依赖于纤维素纤维的封闭性能力。
为达到上述目的,如本发明方案1所载之发明的特征在于它是一种填充于内胎内部的与空气室邻接的封闭剂室内的防跑气用密封闭剂,加进溶媒中的纤维成分,由合成纤维和纤维素纤维构成,并在混合比率上使纤维素纤维比合成纤维所占分额少。
又,本发明方案2所载的发明的特征在于,在方案1所述组成上,使合成纤维的比例占75~90%重量百分比,而使纤维素纤维的比例占25~10%重量百分比。
图1安装着装有内胎的轮胎的车轮横断面图。
图2内胎制造工序示意图。
下面根据附图所示实施例,说明一下本发明的实施状态。
图1及图2表示本发明的实施例,图1为安装着装有内胎的轮胎的车轮的横断面图。图2为表示内胎制造工序过程的示意图。
如图1所示,摩托车用车轮的轮辋R通过轮辐S与轮毂(图中未示)连结在一起。在此轮辋R上安装着由外胎1和装在其内的内胎2组成的装着内胎的轮胎T。内胎2的外壁4,断面为环状,它是由位于半径方向靠里一侧的空气室外壁4i,和位于半径方向靠外一侧的密封剂室外壁4o组成。在此外壁4的空气室外壁4i和封闭室外壁4o相连接的2个连接部由与其成为一体的隔壁5相互联结。在空气室外壁4i和隔壁5所围成的断面近圆形的空气室3内充填空气,在密封剂室外壁4o与隔壁5之间构成的近于圆弧状的密封剂室7内填充下述液体状密封剂8。
轮辋R具有沿装有内胎的轮胎T的圆周方向延伸的环形轮辋的主体部分11,和从轮辋的主体部分11的轴向两端向半径方向外侧延伸的以保持外胎1的内圈的一对凸缘部分12,12。向内胎2内部的空气室3充气用的空气阀6,贯穿轮辋11的圆周方向的一处形成的空气阀安装部13,并用螺母14,15固定住。
这样,由于空气室3的空气压力,内胎2的密封剂室7保持着紧贴外胎1的内侧的状态,故即使充于密封剂室7内的封闭剂8,作用因车轮转动产生的离心力,该密封剂8也不会偏聚在内胎2外侧。因此,当内胎2受到钉子一类东西的刺伤时,封闭剂8可以立即将之修补上,令空气不致从空气室3漏出。另外,密封剂8始终被封存在封闭剂室7之内,不会流进空气室3,故不会有堵塞气咀6或紧接其上的压力仪等事情发生。
下面说明一下上述内胎2的制造方法:
如图2所示的内胎2的制造工序,由以下部分组成,即;材料混匀工序,内胎材料的挤压成形工序,切断工序,空气阀装配工序,开孔工序,接合工序第一硫化工序,密封剂充填工序,生橡胶片粘贴工序,第二硫化工序,以及检查工序。
首先将在材料混匀工序混匀的材料在内胎材料挤压成形工序挤压成形,制成生橡胶制的内胎坯料2′,从挤压成形机的管咀连续地被挤压出来而成形的内胎坏料2′,包括横断面呈圆形的周壁4,和在周壁4直径上两点相接合的隔壁5,以周壁4与隔壁5的接合处为界,分成空气室周壁4i和密封剂室周壁4o。
在接着进行的切断工序,将内胎2的坯料2′切成所要的长度后,在空气阀装配工序,将空气阀6安装于空气室外壁4i的适当部位、然后在开孔工序,在封闭室外壁4o的适当部位上开设密封剂充填孔4l。
在接下去的接合工序,将内胎坯料2′的两端接合在一起后,于第1硫化工序,将上述内胎坯料2′***加热模子内,从空气阀6向空气室3内充进加热的空气或高温水蒸汽,使空气室外壁4i以及密封剂室外壁4o紧贴在加热模子上,同时,使隔离壁5紧贴在密封剂室外壁4o上,在此种状态下加热加热模子而进行硫化。
在接下去的密封剂充填工序,从密封剂充填孔4l向密封剂室7充填密封剂8。此时,在充填密封剂8以前必须先由空气阀6向空气室3内充气使其膨胀,从而使隔离壁5紧贴在密封剂室的外壁4o上,将密封剂室7内的空气全部排出,在此状态下开始密封剂8的充填工作。这样,可以确保防止密封剂8内掺进空气,而单将纯密封剂8充填进去。又,由于是从空气阀6向空气室3内填充的空气,故无在空气室外壁4i上重新再开设小孔的必要。
在接下来的生橡胶片粘贴工序,用生橡胶片19覆盖在密封剂填充孔4l上,接着在第2硫化工序,在生橡胶片19的近傍做局部硫化,将密封剂填充孔4l封上。这样制造内胎2的工作就完成了。由于该生橡胶片19使用的量与内胎坯料2′相同的材料,故可提高密封堵部的强度,确实防止密封剂8的泄漏。最后经过内胎2成品的检查工序而结束整个制造过程。
下面就密封剂8的组成成分加以说明。
封闭剂是在溶媒里掺加合成纤维和纤维素纤维而组成的。溶媒以有降低凝固点效果和保有适当的粘性者为佳,只要是能得到这样的效果的有机溶液或高分子物质的混合液都行。作为上述溶媒的具体例子,可举出以下几种:例如液体聚乙烯乙二醇,液体聚丙烯乙二醇,液体聚丁二烯之类的高分子物质。含有甲基乙烯醚与无水马来酸的聚合物乙烯乙二醇溶液,和含有醋酸乙烯与无水马来酸的聚合物乙醇胺的溶液等固体高分子物质的有机溶剂溶液,以及甲基羟丙基纤维素的乙醇胺与水之混合溶液等一类的固体高分子物质的有机溶液与水的混合液,和聚醋酸乙烯的乙烯乙二醇与水的混合乳化液一类的固体高分子物质的乳化液。另外,由上述两种或两种以上混合制成的混合液也可。
掺入上述溶媒中的合成纤维可举出以下几种,例如:聚酯纤维,尼龙、维尼龙,聚丙烯等的短纤维,其纤维长度以1mm~7mm为最佳。又,掺入溶媒中的纤维素纤维可举出:溶解用纸浆,棉花或麻那样的天然纤维,粘胶丝或玻璃纸那样的再生纤维素,或这些的氧化物等等。在本实施例上使用棉花作为纤维素纤维。
掺进溶媒中的纤维成分的量,即合成纤维和纤维素纤维的合计重量总和与溶媒重量之比,规定在0.5%~10%范围,另外,合成纤维和纤维素纤维的重量比率规定为合成纤维为75%~90%,纤维素纤维为25%~10%。
合成纤维的纤维形状略呈伸直线状而富有流动性,可以迅速地进入内胎2上产生的跑气孔,具有依内胎2的将跑气孔收缩变小的收缩力将此跑气孔堵塞的功能。另一方面,纤维素纤维比合成纤维更柔软,具有和合成纤维缠绕在一起的功能。所以,即使在跑气孔较大,而内胎2的收缩力较小的情形下,由于纤维素纤维与合成纤维缠绕在一起而增加与跑气孔之间的滑动阻力,从而将上述跑气孔堵塞上。
在本实施例中,由于当空气室3相比较,密封剂室3远为狭小,故填充于其内的密封剂8即使受车轮旋转时所生离心力作用,也无合成纤维从溶媒中分离出来的问题。因此,在跑气孔较大的场合,只要含有堵塞该跑气孔所需的最低限度(即纤维成分占整体的10%~25%)的纤维素纤维即可,其结果,可降低成本。换言之,纤维素纤维成分的比率不足10%时,密封效果变小,而上述比率超过25%时,则不但会增加成本而且会妨害合成纤维的流动性而使密封所需时间延长。另外,在本实施例中,由于使用了比纤维素微结晶粉末便宜的纤维素纤维,故可降低成本。
以上详细地叙述了本发明的实施例。在不脱离本发明的主旨的范围内,做种种的设计变更也是可行的。
如上所述,本发明方案1是在内胎内邻接空气室处设置的密封剂室内充填封闭剂,与直接将密封剂充填进空气室的作法相比,掺有密封剂的合成纤维成分不易从溶媒中分离。故无合成纤维成分脱离溶媒的顾虑。同时在保持合成纤维的流动性情形下,将价高的纤维素纤维的混合比率降低至能确保对大的泄气孔的密封性的最小限度即可。由此,在从小泄气孔至大泄气孔的场合都能保证良好的密封性,同时能降低成本。
根据本发明方案2的发明,使合成纤维成分的重量百分比为75%~90%,纤维素纤维成分的重量百分比为25%~10%,因此,在维持纤维素纤维的高密封性的同时,可降低成本。
Claims (2)
1.一种防跑气用密封剂,充填于内胎(2)内的与空气室(3)相邻的密封剂室(7)内,其特征在于:混入溶媒中的纤维由合成纤维和纤维素纤维组成,并使混合比为纤维素纤维所占比例比合成纤维少。
2.如权利要求1所述的防跑气用密封剂,其特征在于,使合成纤维成分占75~90%重量比,而纤维素纤维占25~10%重量比。
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JP16800296 | 1996-06-27 | ||
JP168002/96 | 1996-06-27 | ||
JP168002/1996 | 1996-06-27 | ||
JP173333/1996 | 1996-07-03 | ||
JP17333396A JP3497326B2 (ja) | 1996-06-27 | 1996-07-03 | パンク防止用シール剤 |
JP173333/96 | 1996-07-03 |
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CN1172031A true CN1172031A (zh) | 1998-02-04 |
CN1153688C CN1153688C (zh) | 2004-06-16 |
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EP (1) | EP0816132B1 (zh) |
JP (1) | JP3497326B2 (zh) |
KR (1) | KR100201268B1 (zh) |
CN (1) | CN1153688C (zh) |
AR (1) | AR007592A1 (zh) |
BR (1) | BR9703748A (zh) |
CO (1) | CO4650062A1 (zh) |
DE (1) | DE69701491T2 (zh) |
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US4137206A (en) * | 1977-02-14 | 1979-01-30 | New World Products, Inc. | Tire protection composition |
FR2431379A1 (fr) * | 1978-07-17 | 1980-02-15 | Michelin & Cie | Pneumatique avec revetement d'etancheite vulcanisant en cas de crevaison |
EP0045185A1 (en) * | 1980-07-25 | 1982-02-03 | Hempex Corporation | Tyre sealing and balancing composition |
DK60087D0 (da) * | 1987-02-05 | 1987-02-05 | Alron Chemical Co Ab | Daekbalanceringskomposition |
US5226958A (en) * | 1991-04-11 | 1993-07-13 | Pacemark, Inc. | Sealant for pneumatic inner tubes and tubeless tires |
US5772747A (en) * | 1994-08-01 | 1998-06-30 | Peter Chun | Tire sealant composition |
-
1996
- 1996-07-03 JP JP17333396A patent/JP3497326B2/ja not_active Expired - Lifetime
-
1997
- 1997-06-16 TW TW086108300A patent/TW472004B/zh not_active IP Right Cessation
- 1997-06-17 AR ARP970102624A patent/AR007592A1/es unknown
- 1997-06-19 CO CO97034040A patent/CO4650062A1/es unknown
- 1997-06-24 EP EP97110316A patent/EP0816132B1/en not_active Expired - Lifetime
- 1997-06-24 DE DE69701491T patent/DE69701491T2/de not_active Expired - Fee Related
- 1997-06-25 MY MYPI97002864A patent/MY118688A/en unknown
- 1997-06-26 CN CNB971140227A patent/CN1153688C/zh not_active Expired - Fee Related
- 1997-06-26 KR KR1019970027776A patent/KR100201268B1/ko not_active IP Right Cessation
- 1997-06-26 ID IDP972213A patent/ID17472A/id unknown
- 1997-06-27 BR BR9703748A patent/BR9703748A/pt not_active IP Right Cessation
-
2000
- 2000-07-11 US US09/613,831 patent/US6264732B1/en not_active Expired - Fee Related
Cited By (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
CN100387671C (zh) * | 2000-04-05 | 2008-05-14 | 本田技研工业株式会社 | 自动封口用密封剂、无内胎轮胎和轮胎内胎 |
CN100357090C (zh) * | 2003-01-28 | 2007-12-26 | 横滨橡胶株式会社 | 充气轮胎 |
Also Published As
Publication number | Publication date |
---|---|
BR9703748A (pt) | 1998-11-10 |
MY118688A (en) | 2005-01-31 |
JPH1071806A (ja) | 1998-03-17 |
CN1153688C (zh) | 2004-06-16 |
TW472004B (en) | 2002-01-11 |
US6264732B1 (en) | 2001-07-24 |
KR100201268B1 (ko) | 1999-06-15 |
DE69701491D1 (de) | 2000-04-27 |
AR007592A1 (es) | 1999-11-10 |
KR980002196A (ko) | 1998-03-30 |
ID17472A (id) | 1998-01-08 |
DE69701491T2 (de) | 2000-07-20 |
EP0816132A1 (en) | 1998-01-07 |
JP3497326B2 (ja) | 2004-02-16 |
EP0816132B1 (en) | 2000-03-22 |
CO4650062A1 (es) | 1998-09-03 |
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