当双组份胶在混合过程中就发生局部固化时，胶枪打出来的胶就会出现结皮或硫化现象。出现这一现象的原因主要有三种：
When the two-component rubber is partially cured in the mixing process, the rubber produced by the rubber gun will be skinned or vulcanized. There are three main reasons for this phenomenon:
⑴胶体颜色较黑，固化快时，可能是由于B组分比例过高，过多的催化剂促使固化速度加快。此时，需要适当降低B组分的比例，将结皮或硫化胶冲洗干净后施工；
⑴ when the colloid color is black and the curing speed is fast, it may be due to the high proportion of component B and too much catalyst to accelerate the curing speed. At this time, it is necessary to properly reduce the proportion of component B and wash the crust or vulcanizate before construction;
⑵若打胶过程中伴有出胶慢的现象时，可能是混合芯长时间未清洗或清洗不彻底，胶体结皮堵塞管道。因此，定期清洗静态混合器是很有必要的。
(2) if the glue is slowly discharged during the gluing process, the mixing core may not be cleaned for a long time or not completely, and the colloidal crust blocks the pipeline. Therefore, it is necessary to clean the static mixer regularly.

⑶当固化和出胶速度均无异常，而打出的胶仍有结皮或硫化现象时，则可能是设备停机时间较长，胶枪未清洗或洗枪不够彻底，需要将结皮或硫化胶冲洗干净后后施工。
(3) when there is no abnormality in the curing and rubber outlet speed, and the rubber is still crusted or vulcanized, the equipment may be shut down for a long time, the rubber gun is not cleaned or the gun is not cleaned thoroughly, so it is necessary to wash the crusted or vulcanized rubber before construction.
般而言，胶体本身是没有气泡的，胶体夹有的气泡极可能是运输或施工过程中混入了空气，如：⑴更换胶桶时排气未排干净；⑵组分在上机后压盘未压下去，导致排泡不彻底。 因此，在使用前排泡要彻底，使用过程中应正确操作打胶机，保证密封从而阻止空气进入。若怀疑产品自身就带有气泡，可以通过蝴蝶试验来进行判断。頭條萊垍
Generally speaking, the colloid itself has no bubbles, and the bubbles contained in the colloid are likely to be mixed with air during transportation or construction, such as: (1) the exhaust is not discharged completely when replacing the rubber barrel; (2) after the components are put on the machine, the pressure plate is not pressed down, resulting in incomplete bubble discharge. Therefore, the foam should be thoroughly before use. During use, the glue applicator should be operated correctly to ensure sealing, so as to prevent air from entering. If it is suspected that the product itself has bubbles, it can be judged by butterfly test. Headline Lai long