共查询到20条相似文献,搜索用时 62 毫秒
1.
以三元乙丙橡胶为基体材料制备橡胶汽车玻璃导槽密封条,对摩擦层采用植绒、喷涂和聚乙烯(PE)条复合3种工艺的橡胶玻璃导槽密封条的摩擦阻力和耐磨性能进行探讨。结果表明:植绒工艺橡胶玻璃导槽密封条的摩擦阻力较大,PE条复合工艺橡胶玻璃导槽密封条的摩擦阻力较小;植绒、喷涂和PE条复合3种工艺的橡胶玻璃导槽密封条的干、湿耐磨性能均满足或高于国家和行业标准要求,其中湿耐磨性能逊于干耐磨性能,PE条复合工艺橡胶玻璃导槽密封条的干、湿耐磨性能均优异;喷涂工艺橡胶玻璃导槽密封条的耐磨性能与涂层厚度有关,合理的涂层厚度为18~22μm。 相似文献
2.
汽车橡胶密封条技术概述 总被引:3,自引:1,他引:3
简介了汽车橡胶密封条所用原材料及产品种类、结构和性能。按安装部位,汽车橡胶密封条分为门框密封条、行李箱密封条、发动机盖密封条、导槽密封条、内外侧密封条、头道密封条和风窗密封条等类型。其弹性体多由EPDM密实胶和海绵组成,骨架有钢带、钢丝编织带和铝带几种类型。不同结构的密封条安装固定形式不同。汽车橡胶密封条对胶料耐臭氧老化、耐大气老化、耐低温等性能及成品挤压力、插人力、拔出力、植绒面耐磨性能等要求较高。 相似文献
3.
汽车用橡胶制品现状与发展动向(下) 总被引:1,自引:0,他引:1
5.汽车密封条汽车上使用橡胶密封条的主要作用是密封、减震和装饰。按其功能分 ,有车窗密封条、车门密封条、顶棚防水密封条、装饰条、嵌条及其它密封条等。密封条的材质有橡胶、塑料、橡塑复合、植绒条、热塑弹性体、钢丝编织网状结构、骨架式等。目前全国汽车密封条生产厂约 60余家 ,主要分布在化工、航空航天、机械、交通、合资企业及乡镇企业中。其中多数企业为塑料或橡胶密封条单一挤出生产线 ,只有少数几家企业具有橡胶、塑料、植绒密封条的综合生产能力 ,如贵州红阳汽车密封件有限公司、淮阴橡胶制品一厂、万源德富泰斯密封制品有限… 相似文献
4.
5.
门窗密封条现有纯胶密封条和复合密封条两种,而复合密封条又有橡胶——金属、橡胶——金属——海绵、橡胶一金属——塑料和橡胶——植绒四个类型。该密封条又因具有防水、防尘、防噪音和密封等作用而在汽车、火车、其它车辆和建筑工业门窗得到广泛应用。部分生产密封条的企业,为改善生产装 相似文献
6.
7.
8.
<正> 上海解放塑料制品厂开发的软聚氯乙烯植绒膜于去年12月15日通过技术鉴定。该膜是在软聚氯乙烯薄膜上涂布聚氨酯粘合剂,经静电植绒后烘干固化而制成的。 相似文献
9.
10.
11.
乙烯酮(双乙烯酮)是十分重要的化工中间体,其下游产品较多。江苏某化工厂开发生产乙烯酮(双乙烯酮)下游产品三十多个,年生产规模三万多吨,是国内以乙烯酮(双乙烯酮)为中间体生产精细化学品的综合骨干企业。针对乙烯酮(双乙烯酮)下游产品废水特点,该厂结合企业实际,开展了产品优化,结构调整,清洁生产,资源循环利用,节水降耗等工作,从源头削减了污染物的生产。同时投资二千多万元新建预处理装置三套,6000m3/d废水生化处理装置一套,使全厂乙烯酮(双乙烯酮)下游产品的废水得到了有效的治理。 相似文献
12.
13.
我厂3号回转窑(Φ4m×60m)生产线在1996年年底由SP窑(产量912t/d)改为NSP窑(产量1320t/d),预分解系统为四级旋风预热器带离线式分解炉 相似文献
14.
15.
16.
17.
Conclusions It is significant that the purification on a single passage of viscose through porous ceramic corresponds to the result of a two-stage filtration of it in industrial filter-presses with standard fillings.Kiev Combine. Kiev Technological Institute of Light Industry. Translated from Khimicheskie Volokna, No. 3, pp. 20–22, May–June, 1969. 相似文献
18.
The objective of the study was to explore the effect of the degree of deacetylation (DD) of the chitosan used on the degradation rate and rate constant during ultrasonic degradation. Chitin was extracted from red shrimp process waste. Four different DD chitosans were prepared from chitin by alkali deacetylation. Those chitosans were degraded by ultrasonic radiation to different molecular weights. Changes of the molecular weight were determined by light scattering, and data of molecular weight changes were used to calculate the degradation rate and rate constant. The results were as follows: The molecular weight of chitosans decreased with an increasing ultrasonication time. The curves of the molecular weight versus the ultrasonication time were broken at 1‐h treatment. The degradation rate and rate constant of sonolysis decreased with an increasing ultrasonication time. This may be because the chances of being attacked by the cavitation energy increased with an increasing molecular weight species and may be because smaller molecular weight species have shorter relaxation times and, thus, can alleviate the sonication stress easier. However, the degradation rate and rate constant of sonolysis increased with an increasing DD of the chitosan used. This may be because the flexibilitier molecules of higher DD chitosans are more susceptible to the shear force of elongation flow generated by the cavitation field or due to the bond energy difference of acetamido and β‐1,4‐glucoside linkage or hydrogen bonds. Breakage of the β‐1,4‐glucoside linkage will result in lower molecular weight and an increasing reaction rate and rate constant. © 2003 Wiley Periodicals, Inc. J Appl Polym Sci 90: 3526–3531, 2003 相似文献
19.
20.
A refined nonlinear value of the main parameter of a material, i.e., the elongation modulus versus the instant temperature value, was suggested for introduction into the computational algorithm of tempering stresses. 相似文献