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What should I do if the collapse of soft foam is more severe?

来源:聚氨酯联盟网 浏览量: Time: 2018-12-14 Source: Polyurethane Alliance Network Views: Times

1 公分到 2 公分,半塌泡则是 5 公分以上,而且表面有很多的大泡泡。 In the process of soft foam foaming, I don't know if you will encounter such a problem. There is a phenomenon of semi-collapse. The bubbles are more than 5 cm, and there are many large bubbles on the surface. For this phenomenon, I can only say some solutions based on the opinions of netizens. Whether the solution is useful or not depends on the actual process. Everything is based on actual conditions. All methods are only theoretical knowledge.

Here are some solutions:

这种情况如果是流水线发泡的话,有可能是TDI与聚醚的供料时间没有配合好,可能是聚醚出得慢了,这里的慢是相对于TDI而言就是TDI快了。 First, if this is the case of in-line foaming, it may be that the feeding time of TDI and polyether is not well matched, and the polyether may be slow to produce. The slowness here is that TDI is faster than TDI . 的速度,让它变慢,可能会有效果。 By adjusting the speed of TDI to make it slower, it may be effective. Adjusting the speed of each other will always have results.

流速太快了,加一些A-1 Second, the flow rate is too fast, add some A-1 . Reduce the flow rate.

加大流量,保证量。 Third, increase the flow and guarantee the volume.

硅油的问题,硅油的选择一定要合适,调节硅油的量,如果还是不行,可以考虑更换硅油种类。 Fourth, the problem of silicone oil, the selection of silicone oil must be appropriate, adjust the amount of silicone oil, if it still does not work, you can consider replacing the type of silicone oil.

温度问题,不管是料温,还是模温,都要合适。 Fifth, the temperature problem, whether it is the material temperature or the mold temperature, must be appropriate.

有可能都不是以上问题,而是外在出现问题,检查一下管线的设计,最近是不是更换过硅油或者是TDI的管线。 Sixth, it may not be the above problems, but external problems. Check the design of the pipeline. Has the silicone oil or TDI pipeline been replaced recently?

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