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Closed cell foam
With an independent bubble structure, the inner bubble and the bubble hole are separated by a wall film, and are not communicated with each other. The closed cell foam has an impact resistance, excellent elasticity, softness, sound insulation, heat insulation, waterproof, anti permeability, buoyancy etc...
Open hole foaming material (also known as even hole)
Holes are connected to each other, or completely connected with each other. The single or three dimensional can pass through the gas or liquid, and the bubble aperture is 0.5~3mm.
The bubble is not open or affect the performance of foam body, a bubble to get through the needle hole required rate, results show that the opening rate is high, the compression strength decreases, compression strength is one of the main indicators to measure the performance of foam.
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