Set of process parameters

(A) the lower chamber was China EVA foam coated time is too short or too slow

The key point is the action pumping faster, the sooner you start pumping the better. According to the degree of crosslinking experiment showed that, in a period of time prior to 1:42 can be considered the best extraction time. During this time the CHINA EVA FOAM or is solid or liquid state of good fluidity, the components of the residual gas in the internal voids can be relatively easy to take away. After this time, with the degree of crosslinking of CHINA EVA FOAM increased mobility is getting worse, the remnants of the gas was trapped in the components inside, very difficult to place out. The best time is very short, so the sample is placed in a laminating machine when speed must be fast, to be quickly put the sample, place the sample immediately after closing lid, lid immediately after start pumping. Exhaust before the process takes less time, pumping effect will be better.

(2) lamination pressure is not enough

Size of the pressure corresponding to the duration of inflatable, inflatable longer, the greater the pressure, the smaller the contrary. The size of the control pressure should pay attention to several aspects: First, the pressure is not too high. Too much pressure can cause cells to be crushed, while also easily lead to CHINA EVA FOAM flow, causing solar shift. Second, the pressure is not too small. Pressure is too small, the density of the cured CHINA EVA FOAM has little effect, achieve any effect on the remaining Bubbles in place is not large, CHINA EVA FOAM and TPT, CHINA EVA FOAM adhesive force between the glass is relatively small.

(1) lamination time is too long or too

Lamination was applied to maintain the pressure on the assembly time. Vacuum time, the pressing time and the lamination time and the curing time is CHINA EVA FOAM. Under the pressure of the airbag begin the assembly process is internal residual gas discharge process, and apply some pressure components, so that after curing CHINA EVA FOAM film molecular structure is more compact, with a better performance if the laminated assembly time to grasp the bad words possible to produce bubble phenomenon.