I. Reasons:

1, some auxiliary moisture absorption by wet rain and improper storage lead to excessive moisture content, such as light calcium heavy calcium clay silica carbon black and other fillers.

2, plasticizer and some functional additives in some low flash point low volatile substances more.

3, the film cooling process moisture is not blown dry volatilization off on the film storage.

4, plum rain season or rainy season air humidity is too large and too humid.

5, hygroscopic agent moisture absorption failure.

6. Mooney viscosity of rubber material is low.

7, the rubber sulfur speed is slow, the coking time is too long, the rubber setting time is too slow.

8. The mixing and discharging temperature is somewhat low, and some water does not evaporate.

Ii. Solutions:

1, raw materials into the factory inspection and storage, do ventilation tie mouth custody.

2, the use of high flash point paraffin oil, less use of low flash point low volatile materials.

3. After cooling and blow-drying, the film is collected.

4. In plum rain season, use 2-5 portions of hygroscopic agent. Note that the hygroscopic agent does not fail.

5. Raise the mixing and discharging temperature. In the case of water vapor, raise the top plug several times to evaporate the water.

6. The Mooney viscosity of the mixing glue is improved by using Mooney gel or oil-filled raw glue.

7, under the premise of ensuring the safety of processing, adjust the vulcanization system, shorten the burning time, let the rubber strip quickly finalize the design, reduce the occurrence of porosity hollow phenomenon.

8. Reasonable extrusion process and mouth shape design.

9, ensure adequate parking time of plastic material, it is best to use it after 24H.

10. It is more appropriate to control the burning time of 125℃ Mennite T5 in 5-8 minutes.