|
BMW i8 uses Tepex composites for rear muffler cover
1/8/2015 |
|
|
"Engineers increasingly are using Tepex performance composites from Lanxess subsidiary Bond- Laminates to significantly improve the mechanical strength of components made of fibre reinforced thermoplastic compression molding compounds," Lanxess says.
It adds, "The latest example is a cover on the rear muffler of the BMW i8, which is fabricated in a direct long fiber thermoplastic (DLFT) process from a polypropylene compression molding compound reinforced with long glass fibre rovings."
An insert made of Tepex dynalite 104-RG601 is used as the surface layer and with its stiffness at high temperatures; it ensures that the cover undergoes no deformation or failure in the hot environment of the rear muffler and also improves impact resistance of the component in freezing temperatures.
The Tepex insert is 0.5 millimeters thick and made of a polypropylene matrix, incorporating 47 per cent by volume continuous glass fibre rovings as a single-layer fabric and due to this insert, the stiffness of the cover increases by a factor of four at room temperature and a factor of six at the operating temperature of the rear muffler.
"In penetration tests to DIN EN ISO 6603-2, the Tepex dynalite formulation used proved to be eight to nine times more impact resistant at room temperature than a DLFT compression molding compound based on polypropylene," Lanxess explains.
"At temperatures of -30ºC, the impact resistance is even 10 times higher. DLFT based on polypropylene will splinter under these conditions in a crash, our Tepex will not," Harri Dittmar, composites expert at Bond-Laminates said.
Lanxess informs that Tepex also is an attractive option for locally reinforcing components made of other thermoplastic compression molding compounds and forming materials.
It explains that the mechanical properties of Tepex-reinforced DLFT polypropylene materials are on par with glass-mat-reinforced and glass-fabric-reinforced thermoplastic systems (GMT and GMTex) based on polypropylene.
"In this case, the combination of Tepex with the DLFT process opens up considerable savings potential, for instance in the fabrication of underbody components," Dittmar notes.
Polypropylene-based, low-weight reinforced thermoplastics (LWRT), which are used to manufacture underbody panels due to their high sound absorption, can also be significantly stiffened with Tepex surface layers.
Using a single-layer Tepex component preserves the acoustic effect. The result is components that can easily withstand the mechanical loads associated with road traffic.
Lanxess is a specialty chemicals company with sales of ?8.3 billion in 2013 and about 16,700 employees in 29 countries and has 52 production sites worldwide and produces plastics, rubber, intermediates and specialty chemicals. (AR) |
|
|
|
|
|
主站蜘蛛池模板：
在线 欧美 中文 亚洲 精品|
少妇被无套内谢免费看|
欧美成人动态图|
亚洲国产综合日韩AV一波多野结衣
|
新河县|
免费av一区二区三区在线|
亚洲精品日韩在线丰满|
亚洲午夜精品一区二区三区|
最新亚洲人成网站在线观看
|
一区二区三区四区自拍视频|
jizz网站|
尉犁县|
AV无码中文字幕不卡一二三区|
在线天堂最新版资源|
免费午夜无码片在线观看影院|
国产???做受视频|
国产亚洲日韩欧美一区二区三区|
亚洲youjizz|
亚洲日韩国产精品无码av|
亚洲精品字幕|
国产综合久久99久久|
亚洲悠悠色综合中文字幕|
超碰福利导航|
麻豆精品一区综合av在线|
米奇欧美888四色影视在线|
国产高潮流白浆在线观看|
亚洲色综网|
一卡2卡三卡4卡免费网站|
亚洲成av人片不卡无码手机版|
美乳?丝袜?影音先锋在线|
国内精品大秀视频日韩精品|
日日夜夜精品亚洲天堂|
九九热在线观看免费视频|
久久熟妇|
有码中文亚洲精品狠狠|
国产免费观看网站黄页|
国产欧美日韩精品a在线观看|
国产精品一区二区三区日韩|
公天天吃我奶躁我的在线观看|
欧美日韩一区二区三区韩大
|
3d全彩无码啪啪本子全彩|
