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  • 汽车制造都用到了哪些热熔胶?
  • 本站编辑:杭州大伟胶粘剂有限公司发布日期:2019-10-30 21:23 浏览次数:
  作为环保型热熔胶被广泛应用在汽车制造中的汽车顶棚、汽车门板、汽车地毯、汽车线束、轮胎保护、汽车标签、汽车滤清器、车灯、驾驶台仪表板等部件的粘接上。  
汽车工业要用哪些热熔胶
1、聚氯乙烯顶篷与绝缘层等的粘接  
 
  过去大多采用溶剂型胶粘剂,其用量大。这种溶剂胶是用氯丁橡胶、丁腈橡胶、丁苯橡胶与增粘树脂一起溶解在溶剂中制成,粘接过程要通风吹干溶剂,操作环保恶劣,对操作工作有身体伤害。近年来采用,热熔胶网胶膜、散热熔胶粉、直接喷涂压敏热熔胶等等方法来代替原有粘接工艺,大大改善了工作环境,符合VOC及汽车内室环境标准。  汽车顶篷及车身其他隔热防隔音层的复合现在越来越多厂商使用热熔胶,通常是合成橡胶型热熔压敏胶。这种类型热熔胶胶具有较好的抗低温性能,低气味,低VOC,快速固化,环保无毒,没有挥发性物质,需要专用热熔胶涂喷设备,可以定量涂布,适合产生工艺要求,适合自动化生产。  
 
2、汽车内装饰件的粘接  
 
  汽车内饰件大多属于PVC、ABS薄膜、薄片、板材、泡沫塑料板材、地毯及木纹装饰板等非金属材料。受力较小的装饰零部件,现在一般都采用热熔胶粘接,塑料薄片包裹们的边缘和装饰衬板边时,也用热熔胶来粘接定位。  
 
 
3、汽车车身覆盖件的焊接密封  
 
  对于车身进行密封时,整辆汽车已处于后期装置阶段,施工质量要求较高,特别是一些车身外的部位,要求胶缝尽可能小而平滑,以保证车身美观。现在多采用热熔胶代替双组分橡胶胶粘剂,热熔胶通常是聚烯烃的或者PUR热熔胶。  
 
 
4、汽车线束的应用  
 
  汽车的电气控制线路组成各种线束,线束的捆扎和固定都采用线束胶带来实现。这种用途对线束胶带具有阻燃性、强粘合力、耐老化性优良、能抗击一定的高温和一定的低温条件,捆扎后不要有翘起现象,还要满足胶带解卷力适合汽车生产工艺要求。这类热熔胶目前应用最为广泛的是合成橡胶型热熔压敏胶。  
 
 
5、汽车车门板防水PP膜和发泡板用的可发泡热熔压敏胶
 
  每扇汽车的车门板内部都会用到防水PP膜或发泡板。PP膜或发泡板可以在下雨或洗车时防止水进入汽车内部造成零件生锈。传统上,汽车装配厂都使用丁基橡胶基密封胶条将PP膜或发泡板粘到车身上。近几年,热熔压敏胶已广泛应用在这个领域中。因为SBC基的热熔压敏胶比丁基橡胶基密封胶的弹性更高,在售后服务市场中修理作业时,可以轻易的从车体表面很干净的移除。也可以达到防水的目的。  
 
 
6、汽车门板与橡胶密封条的粘接
 
 这类粘接有相当一部分是机器人自动化操作,是用热胶胶来粘接的。这个粘接的要求特别强调在-40度和108度时热熔胶是否还保持粘接力,对于粘接强度会关注粘接后24小时的粘接力。不同的厂家有不同的标准,但都模拟了汽车在现实环境下的应用。  
 
7、汽车轮胎保护胶
 
  因为汽车轮胎爆胎而发生的交通事故,每天都会发生,胆小的女司机对于汽车爆胎更是害怕。最近几年,市面上汽车美容市场提供一种服务,为车的轮胎涂胶,叫做防爆胶,可以当场做实验,把涂过胶的轮胎装上汽车,开到铁钉板上扎,确实没有爆胎漏气。这种胶是一种热熔胶,国内现在有好几家可以提供这类产品,几年前还是进口的,价格不低。  
 
 
8、汽车滤清器用热熔胶
 
  现今的汽车,大小差异大、品牌品种繁多、动力系统可为汽油、柴油、液化气、电瓶等类型,所用的滤清器也各不相同,一个汽车通常需要4个滤清器,发动机空气滤清器、空调滤清器、汽油滤清器、机油滤清器,滤清器为消耗品,通常汽车运行5000公里要更换一次。在制造滤清器时,多处需要粘接,这些粘接大多数用热熔胶。但滤清器用胶也是各不相同,机油、汽油用的胶多为PA聚酰胺热熔胶,而空汽滤清器则多用EVA热熔胶、PA热熔胶、PO热熔胶,多种类型的热熔胶。
 
  不同的汽车品牌厂商对粘接要求是不同的,他们的关注点各有差异,但是基本内容是相通的,那就是要模拟汽车在实际使用过程中可能面临的环境。抗高温要求和耐低温要求是最为关键要求,汽车在使用过程中会面临春夏秋冬的变化,需要经受住夏日的高温暴晒,也要经受住低温的寒冬,会面临南方的湿热天气,也会临北方干燥炎热的天气的考验等等。 
 
 
  随着人们越来越关注汽车室内环境质量,要求汽车内无刺激性气味,空气清新,热熔胶将会代替溶济型胶粘剂而广泛应用在汽车内饰的各部件的粘接上。热熔胶在汽车行业中的应用量占比非常小,一辆汽车用热熔胶不足4公斤,但却对整个汽车的总体品质影响是非常大,可能就是因为采用热熔胶方式粘接,而改善了汽车内的空气质量,让人感受到车的高端品质。弄清楚热熔压敏胶的粘接原理,正确把握热熔压敏胶内在结构,对于选择合适的热熔胶产品至关重要,杭州大伟胶粘剂有限公司专业致力于热熔胶的开发和生产,专注汽车滤清器热熔胶解决方案多年,同国内外众多汽车配套厂合作,具有丰富的滤清器制造经验和成熟的配套热熔胶解决方案,欢迎来电咨询!
As an environmentally friendly hot-melt adhesive, it is widely used in the adhesion of automobile roof, door plate, automobile carpet, automobile wiring harness, tire protection, automobile label, automobile filter, lamp, dashboard and other parts in automobile manufacturing.
 
Which hot melts are used in the automobile industry
 
1, PVC roof and insulation layer adhesion
 
 
 
In the past, most solvent - based adhesives were used. This solvent adhesive is made of chloroprene rubber, nitrile rubber, styrene-butadiene rubber and adhesive resin together dissolved in solvent, the bonding process to ventilation blow dry solvent, poor environmental protection operation, the operation of physical injury. In recent years, hot melt adhesive network film, powder hot melt adhesive, direct spray pressure sensitive hot melt adhesive and other methods to replace the original bonding process, greatly improve the working environment, in line with VOC and automotive indoor environmental standards. More and more manufacturers are now using hot melt adhesive, usually synthetic rubber hot melt pressure sensitive adhesive. This type of hot melt adhesive has better resistance to low temperature, low smell, low VOC, fast curing, environmental protection, non-toxic, no volatile substances, need special hot melt adhesive spraying equipment, can be quantitative coating, suitable for production process requirements, suitable for automatic production.
 
 
 
2. Adhesion of automobile interior decoration parts
 
 
 
Automotive interior decoration mostly belongs to PVC, ABS film, thin film, plate, foam plastic plate, carpet and wood decorative plate and other non-metallic materials. Force is less decorative parts, now generally use hot melt adhesive bonding, plastic sheets wrapped the edge and decorative lining board edge, also use hot melt adhesive bonding positioning.
 
 
 
 
 
3. Welding seal of automobile body cover
 
 
 
For the body sealing, the whole car has been in the late installation stage, the construction quality requirements are higher, especially some parts outside the body, the requirements of glue seam as small as possible and smooth, to ensure the body beautiful. Hot-melt glue is used to replace two-component rubber adhesive, hot-melt adhesive is polyolefin or PUR hot-melt adhesive.
 
 
 
 
 
4. Application of automobile wiring harness
 
 
 
The electrical control circuit of the automobile is composed of various wiring harnesses. The binding and fixing of wiring harnesses are realized by using wiring harness tape. This use of wire harness tape has flame retardant, strong adhesion, good aging resistance, can resist a certain high temperature and a certain low temperature conditions, after tying do not have the phenomenon of warping, but also meet the tape unwinding force suitable for automobile production process requirements. The most widely used hot melt adhesive is synthetic rubber hot melt pressure sensitive adhesive.
 
 
 
 
 
5, car door waterproof PP film and foam board can be foam hot-melt pressure-sensitive adhesive
 
 
 
Each car door USES a waterproof PP membrane or foam sheet inside. PP film or foam board can prevent water from getting into the car when it rains or washes, causing parts to rust. Traditionally, automotive assembly plants have used butyl rubber - based sealant strips to attach PP film or foam sheet to the car body. In recent years, hot-melt pressure-sensitive adhesive has been widely used in this field. Because sbc-based hot-melt pressure-sensitive adhesives are more flexible than butyl rubber-based sealants, they can be easily removed from the body surface cleanly during repair operations in the aftermarket. It can also be waterproof.
 
 
 
 
 
6, the car door and rubber seal adhesive
 
 
 
This kind of bonding is a considerable part of the robot automation, is the use of hot glue to bond. This bonding requirement especially emphasizes whether the hot melt adhesive still maintains the adhesive relay at -40 ° c and 108 ° c. Regarding the bonding strength, the adhesive relay 24 hours after bonding will be concerned. Different manufacturers have different standards, but they all simulate the application of cars in the real world.
 
 
 
7, car tire protection glue
 
 
 
Traffic accidents that happen because of a flat tire occur every day, and timid female drivers are even more afraid of a flat tire. In recent years, the auto beauty market on the market to provide a service, for the car tire coated with glue, called explosion-proof glue, you can do the experiment on the spot, put the tire coated with glue on the car, drove to the nail board to tie, really no tire leakage. This kind of glue is a kind of hot melt glue, now there are several domestic can provide this kind of product, a few years ago was imported, the price is not low.
 
 
 
 
 
8. Hot melt adhesive for automobile filter
 
 
 
Today's cars, large size differences, brand variety, low power system for gasoline, diesel oil, LPG, battery types, such as the filter also each are not identical, a car usually requires four filter, engine air filter, air filter, fuel filter, oil filter, filter for consumables, usually car running 5000 km to change one more time. In the manufacture of filters, a number of joints are required, most of which are bonded with hot melt. But the filter with glue is also different, oil, gasoline with glue for PA polyamide hot melt adhesive, and air air filter is multi-purpose EVA hot melt adhesive, PA hot melt adhesive, PO hot melt adhesive, a variety of types of hot melt adhesive.
 
 
 
Different automobile brands and manufacturers have different requirements on bonding, and their concerns are different, but the basic content is the same, that is, to simulate the environment that the car may face in the actual use process. The requirement of resisting high temperature and low temperature is the most critical requirement. The car will face the change of spring, summer, autumn and winter in the process of use. It needs to withstand the high temperature exposure in summer and the cold winter.
 
 
 
 
 
As people pay more and more attention to the quality of indoor environment in the car, there is no pungent smell in the car, the air is fresh, hot melt adhesive will replace the solvent adhesive and widely used in the car interior parts of the adhesive. Hot melt adhesive occupies a very small proportion in the automobile industry. A car USES less than 4 kg of hot melt adhesive, but it has a great impact on the overall quality of the whole car. It may be because of the use of hot melt adhesive bonding, which improves the air quality inside the car and makes people feel the high-end quality of the car. Clear hot melt pressure sensitive adhesive bonding principle, correctly grasp the hot melt pressure sensitive adhesive inner structure, is very important to select the appropriate hot melt adhesive products, hangzhou dawei adhesive co., LTD., professional committed to the development and production of hot melt adhesive, focus on auto filter hot melt adhesive solution for many years, cooperation with domestic and international numerous car production, has the rich filter manufacturing experience and mature supporting hot melt adhesive solution, welcome to inquire!