At present, the invisible car clothing on the market is generally divided into these parts, of which the important parts are coating, TPU substrate and glue layer

先说胶水，胶水简单，胶水现在基本都还不错，但是我担心有无底线的商家省成本无底线，三招辨别：1闻，刺鼻不好，2捏，脱手后，手粘不好，3抠，胶面朝上，左手按住膜，右手指甲抠十次，观察胶面有无明显亮斑，有说明脱胶了。如果脱胶说明未来撕膜会留胶。

Let's talk about the glue. The glue is simple. The glue is pretty good now. But I'm worried that the merchants with or without the bottom line will save the cost. There are three ways to distinguish: 1. Smell, pungent, 2. Pinch, after taking off, the hand doesn't stick well, 3. Pull the glue face up, press the film with the left hand, and pull the nail with the right hand ten times. Observe whether there are obvious bright spots on the glue face, which indicates that the glue is degummed. If degumming, the film will be torn in the future.

接下来说基材，原始的基材材质叫做PVC，也就是聚氯乙烯，人话叫塑料，塑料膜现在已经被市场淘汰了，但是还是有一些工厂的尾货需要处理，在一个因为大众不了解，而且便宜，所以这种膜目前在市面还是有所流通，这种膜会怎么样了，短则2周长则个把月，这种膜就会开始出现发污或者出现水斑，半年左右就会开始发黄发硬，一年之后就已经惨不忍睹了

Next, we talk about the base material. The original base material is called PVC, which is also called PVC. The plastic film has been eliminated by the market, but there are still some factories that need to deal with the tail goods. Because the public doesn't understand it and the price is cheap, this kind of film is still in circulation in the market. What will happen to this kind of film? It can be as short as two weeks and as long as a month, This kind of film will start to appear dirty or water spots, about half a year will begin to yellow and hard, after a year has been unbearable

后面才开始出现TPU材料，开启了隐形车衣的大门，替代PVC真正实现了隐形车衣的核心功能，抗剐蹭、防磕碰、防崩点，赋予二手车更保值的特点，TPU是一种热塑性聚氨酯弹性体

Later, TPU materials began to appear, opening the door of the invisible car suit, replacing PVC to truly realize the core functions of the invisible car suit, such as anti scratch, anti bump, anti collapse point, giving used cars more value preservation features. TPU is a kind of thermoplastic polyurethane elastomer

那么还有1个TPH又是材质基材了的？但是目前没有查到有化学资料叫做TPH，所以这到底是一个什么材料的，在这我也说不清楚

So there's another TPH that's made of material? However, there is no chemical information called TPH, so I don't know what kind of material it is

那这么多材料中，如何判断是不是真 正的TPU材料了？真 正的TPU基材是非常强烈的拉升性，涂层保护TPU也需要一定的韧性，在施工中是伴随着一定的拉伸的，因此涂层的柔软度非常重要，否则就会涂层断裂形成纹路，进而导致车衣快速出现黄变、水斑、断裂等问题，那么消费者如何把膜拿在手里就可以分辨其好坏，一个简单又靠谱的方式，切下一小块待测试的膜一小条做缓慢拉伸，注意：是缓慢拉伸、细致观察

How to judge whether it is the real TPU material? The real TPU base material has a very strong pull-up property. The coating also needs a certain toughness to protect the TPU. During the construction, it is accompanied by a certain stretch. Therefore, the softness of the coating is very important. Otherwise, the coating will break and form lines, which will lead to rapid yellowing, water spots, fracture and other problems of the car clothing. How can consumers hold the film in their hands to distinguish the good from the bad, In a simple and reliable way, cut a small piece of film to be tested and stretch it slowly. Note: stretch slowly and observe carefully

除了纹路之外，用手去摸也可以对涂层有所感知，这就需要手感，优良膜的相对柔软表面感觉比较涩，劣质膜表面很硬，表面光滑且泼水性很强；

In addition to the grain, you can feel the coating by hand, which requires hand feeling. The excellent film is relatively soft, and the surface feels astringent. The poor film is very hard, smooth and water splashing;