Due to the needle nail, it can bring the temperature to the middle of the glue to realize even foaming and sulfuration.
由于针钉作用，可将温度带入胶体层中部，实现均匀发泡、硫化。
The invention is used for producing PVC foaming products which have dense and even stomata structure and lower density.
用于PVC发泡制品，使制品气孔结构稠密而均匀，密度更低。
The invention is used for producing PVC foaming products which have dense and even stomata structure and lower density.
用于PVC发泡制品，使制品气孔结构稠密而均匀，密度更低。
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