1. There is water (add calcium oxide when mixing);
2. Not fully vulcanized, unappreciated and appears to have bubbles;
3. There are many impurities in the vulcanizing agent, impurities of small molecules become decomposed in advance, and bubbles remain in the product;
4. The exhaust design of the mold itself is unreasonable, and the gas cannot be discharged in time when the rubber material strikes the line.
5. Poor dispersion;
6. Plastic compounding takes a long time and there are bubbles when the product is vulcanized.
TEL: +86-573-87767299
FAX: +86-573-87763488
E-mail: sales@qlrubber.com