Research on the forming process of large-diameter polypropylene foaming monofilament
This paper mainly introduces the spinning process of large-diameter polypropylene(PP)foaming monofilament,studies the effects of different process parameters such as spinning temperature,cooling water temperature,mass fraction of foaming masterbatch,stretching ratio,stretching multiple and heat setting temperature on the mechanical properties of large-diameter PP foaming monofilament by differential scanning calorimeter and tensile strength tester.The study shows that when the mass fraction of foaming masterbatch was 3%,the cooling water temperature was 15℃,the stretching multiple was 7 times,the first level stretching ratio was 85%,the hot water stretching temperature was 90℃,the hot air stretching temperature was 155℃,and the heat setting temperature was 175℃,the strength of large-diameter PP foaming monofilament was the highest and the foaming effect was good.
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