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喷塑烤房:汽车塑料件涂装及加强涂层附着处理方法

文章发布: 发表时间: 2017-03-30 11:30:57

这些年,跟着国内轿车市场的炽热升温,中国的轿车工业得到了迅猛发展,这也使得人们对轿车的外观、安全性和节能环保提出了更高的要求。而轻质塑料资料的运用不仅能减轻轿车的质量、节约能源,使轿车更加安全舒服,它还比金属更耐大气腐蚀、耐汽油,易于加工成型而下降生产成本,因而得到了越来越广泛的运用。
In recent years, with the domestic car market warming up, China's car industry has been rapid development, which also makes people on the appearance of the car, safety and energy saving and environmental protection put forward higher requirements. While the use of lightweight plastic materials can not only reduce the quality of cars, energy saving, so that the car is more safe and comfortable, it is more than the metal corrosion resistance, gasoline, easy machining and decreased production cost, so it has been more and more widely used.
尽管塑料件的运用具有许多优势,可是塑料件自身也面对许多疑问,例如耐紫外光性差,易老化。因而,为了改进塑料成品的质感,进步其防护功能和装修作用,延长塑件寿数,有必要对塑料成品进行外表涂装。大多数塑料具有极性小、结晶大、外表张力低、潮湿性差、外表润滑等特色,致使塑件涂层附着力变差。因而,怎么进步塑件涂层的附着力是塑件涂装需要处理的关键疑问之一。
Although the use of plastic parts has many advantages, but the plastic parts themselves are also facing many questions, such as UV resistance, aging. Therefore, in order to improve the texture of plastic products, advance the protection function and the decoration effect, prolong the life of plastic parts, it is necessary to carry out the surface coating of plastic products. Most of the plastic has the characteristics of small polarity, large crystal, low surface tension, poor moisture, and surface lubrication, which leads to poor adhesion. Therefore, how to improve the adhesion of plastic parts coating is one of the key questions that plastic parts need to be dealt with.
要想处理轿车塑料件涂层附着力的疑问,就有必要对轿车塑料件涂装的技术流程有所了解,依据笔者的整理搜集,轿车塑料件的技术流程大致能够分为以下几有些:
In order to deal with the coating adhesion of car plastic parts of doubt, it is necessary to understand the process of coating car plastic parts, according to the collected, car technical process of plastic parts can approximately be divided into the following some:
坯件打磨一化学处理一除尘一喷底漆一色漆(或金属亮光漆)一罩光一烘烤一交验一合格品入库一不合格品返修或脱漆。
A chemical treatment of a blank grinding dust spray primer paint color (or metal varnish) a light cover a baking a submit a qualified storage of unqualified products or repair paint.
据了解,在这许多的技术环节中,进步塑料件涂层附着力最重要的环节即是漆前预处理。轿车塑件漆前预处理的意图是经过一系列物理化学办法,进步涂料对塑料的附着力,削减涂层的各种缺点,然后进步塑料涂层的质量。塑件漆前预处理有惯例处理法、酸处理法、火焰处理法、界面活性剂处理法、热溶剂处理法、紫外线处理法和等离子处理法等。
It is understood that in many of these technical aspects, the most important step to improve the adhesion of plastic parts is pre coating pretreatment. The purpose of pretreatment of car plastic parts is through a series of physical and chemical methods, to improve the adhesion of the coating to the plastic, to reduce the various shortcomings of the coating, and then improve the quality of plastic coating. The pre treatment of plastic parts is treated by conventional treatment, acid treatment, flame treatment, surfactant treatment, heat treatment, UV treatment and plasma treatment.
1、惯例处理法
In 1, the conventional treatment method
所谓惯例处理,即除尘、除静电、脱脂。塑料是不良导体,简单发生静电,在储存和运送过程吸附了尘埃或成品修整下来的碎屑,将严重影响涂膜的附着力和涂膜硬度。
The so-called conventional treatment, that is, dust removal, in addition to static electricity, degreasing. Plastic is a poor conductor, a simple static electricity, in the storage and transportation process to absorb dust or finished products to remove the debris, will seriously affect the adhesion of the film and film hardness.
为清洗成品外表,可用化学溶液洗涤,一起还能够除尘、除静电。
In order to clean the surface of the finished product, it can be washed by chemical solution.
2、酸处理
2, acid treatment
这种办法是用酸性物质对塑料外表进行处理,使外表氧化导入亲水性官能团,然后进步外表潮湿性;一起使外表蚀刻为多孔结构,改进涂料在塑料上的附着力。
This approach is the treatment of plastic appearance with acidic substances, so that the appearance of oxidation into hydrophilic functional groups, and then the appearance of wet to make progress; appearance etching porous structure, improving coating on plastic adhesion.
3、火焰处理法
3, flame treatment
火焰处理是将火焰喷到塑料外表,使表层温度达1000~2800℃,但处理时刻极短(以秒计),防止塑料损害熔化。这么可使塑料表层分子有些氧化,然后改进潮湿性和附着力。
Flame treatment is the flame sprayed to the plastic surface, so that the surface temperature of 1000 to 2800 degrees C, but the processing time is very short (in seconds), to prevent plastic damage melting. So that the surface of the plastic molecules are oxidized, and then improve the wettability and adhesion.
4、界面活性剂处理法
4, surfactant treatment
界面活性剂处理法是经过在塑料中加入外表活性剂,使其在塑料外表构成单分子层,得到高能外表,进步涂膜的附着力。此外,界面活性剂能一起赋予塑料防静电性、润湿性和附着性。
The surfactant treatment method is to add the surface active agent in the plastic, so that it forms a single molecular layer in the plastic surface, get high energy appearance, improve the adhesion of the film. In addition, the surfactant can be given together with the plastic anti-static, wettability and adhesion.
5、热熔处理法
5, hot melt treatment
热溶剂处理法是指塑料在高温情况下,运用特定的溶剂进行短时刻处理。处理过程中,塑料外表进行剧烈的膨胀,或是呈现富含被腐蚀的非结晶有些和受影响较小的结晶有些的粗面,然后进步涂料的附着力。
Hot solvent treatment is the use of a particular solvent in the high temperature environment for short time processing. In the process of treatment, the plastic surface of the expansion, or is rich in corrosion of non crystalline and some of the less affected some of the rough surface, and then improve the adhesion of the paint.
6、紫外线处理法
6, UV treatment
紫外线处理法是以紫外线照耀塑料,使用空气中氧的作用,使塑料外表发生极性基团,添加外表张力,下降涂料的接触角,进步涂膜的附着力。
UV treatment method is the use of ultraviolet light to shine on the plastic, the use of oxygen in the air, so that the appearance of plastic polar groups, the addition of surface tension, drop the contact angle of the paint, improve the adhesion of the film.
7、等离子处理法
7, plasma treatment
等离子设备主要由等离子发生器、气体运送系统及等离子喷头号构成。该办法作业原理为:由等离子发生器发生高压高频能量,经过辉光放电发生低温等离子体,借助压缩空气将等离子体喷向塑件外表,以消除塑件外表的静电,并去掉塑件外表的碳氢类污物(如油脂和塑料材质中的辅助添加剂等)。
The plasma equipment mainly consists of a plasma generator, a gas delivery system and a plasma nozzle. The way of operating principle is: high voltage high frequency energy by the plasma generator, after low temperature plasma glow discharge, the plasma spray to the plastic surface of compressed air, to eliminate static plastic appearance, and remove the dirt plastic appearance of hydrocarbons (such as oil and grease and plastic material in auxiliary additives, etc.).
另外,要想进步涂层附着力,还应在施工过程中严格控制塑料制件涂装前的外表处理及施工环境,确保涂装质量,在运用新型塑料资料的一起,要重视进步其外表张力和极性,必要时更改前处理技术和底漆种类。
In addition, to improve the adhesion of the coating, we should strictly control the appearance of plastic parts processing and construction environment before coating during the construction process, to ensure the quality of coating, in the use of new plastic materials together, should pay attention to the progress of surface tension and polarity change pretreatment technique and primer types when necessary.

 

 

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