YuChun
Email : info3@greentpu.com
Add:No. 11, Wentang North Road, Wenzhou Road, Dongcheng Dist., Dongguan, Guangdong, China
(Old address:No. 232, Wentang North Road, Wenzhou Road, Dongcheng Dist., Dongguan, Guangdong, China)
How to solve the foaming problem of TPU hot melt adhesive film during lamination?
The main factors that affect the bonding effect of cast TPU hot melt adhesive film are selection and operation. Common bonding problems include degumming, weak bonding force, bubbles after bonding, etc. Debonding and weak bonds can be a matter of choice. Bubbles after bonding are mainly caused by problems during the operation.
Regardless of TPU hot melt adhesive film or hot melt mesh adhesive material, the main reason for bubbling is that the air cannot be discharged. This situation is very common in the application of non-breathable product materials such as films. Due to non-breathable product materials such as films, the air accumulated on the surface during the bonding process cannot be discharged like non-woven materials.
Therefore, during the lamination process of the TPU hot melt adhesive film, if the entire surface is directly pressed, the air in the middle will easily accumulate, and the TPU hot melt adhesive film will easily bubble after lamination. The solution to this type of foam caused by air buildup is to slowly heat and compress the material from one side with a roller compressor or iron. In this way, the air in the middle can be continuously discharged through the surroundings, and there will be no air accumulation and foaming after bonding.
The reason for foaming after bonding is not only the accumulation of air that cannot be discharged, but also the foaming caused by secondary heating. This situation is very common in materials and industries that require secondary composite technology. This material usually does not bubble when bonded for the first time, but because the TPU hot melt adhesive film will be melted again by the second heating, if there is no certain pressure, it will cause the product to bubble.

YuChun
Email : info3@greentpu.com
Add:No. 11, Wentang North Road, Wenzhou Road, Dongcheng Dist., Dongguan, Guangdong, China
(Old address:No. 232, Wentang North Road, Wenzhou Road, Dongcheng Dist., Dongguan, Guangdong, China)
· Sample thickness, width to write clearly.
· Sample color and surface effect to be noted.
· Sample hardness and special requirements Please note.
Please contact: +86-13686006083(WeChat)
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