當雙組份膠在混合過程中就發生局部固化時，膠槍打出來的膠就會出現結皮或硫化現象。出現這一現象的原因主要有三種：
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膠體顏色較黑，固化快時，可能是由于B組分比例過高，過多的催化劑促使固化速度加快。此時，需要適當降低B組分的比例，將結皮或硫化膠沖洗干凈后施工；
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若打膠過程中伴有出膠慢的現象時，可能是混合芯長時間未清洗或清洗不徹底，膠體結皮堵塞管道。因此，定期清洗靜態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當固化和出膠速度均無異常，而打出的膠仍有結皮或硫化現象時，則可能是設備停機時間較長，膠槍未清洗或洗槍不夠徹底，需要將結皮或硫化膠沖洗干凈后后施工。
(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，膠體本身是沒有氣泡的，膠體夾有的氣泡極可能是運輸或施工過程中混入了空氣，如：⑴更換膠桶時排氣未排干凈；⑵組分在上機后壓盤未壓下去，導致排泡不徹底。 因此，在使用前排泡要徹底，使用過程中應正確操作打膠機，保證密封從而阻止空氣進入。若懷疑產品自身就帶有氣泡，可以通過蝴蝶試驗來進行判斷。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