When manufacturing polyurethane or gel products, we may frequently encounter bubbles in production or underfeeding at the surfaces, they are very common problems and especially with older devices. These can lead kinds of disqualification like as poor appearances, serious flaws and even scraps. Variety of factors, technical skills, production craft, materials flow and others should be considered as causes and for prevention.

Some of the bubbles can be easily found in transparent production, we can press the product for inspection to check bubbles in non-transparent. Bubbles are difficultly to be found in practice, the best way is to improve the process craft and import advanced equipment.

Underfeeding at the bottom has strong impact on appearance and customer purchases, they might be caused by molds defect, low flow, outdated machine, and inexpert operation, etc. All the links we should take care.