The invention discloses a preparation method of upright polypropylene infusion bags, including the following steps: heating the برميل temperature of a one-step hollow قالبing machine to 160°C–250°C; injecting molten PP material into a bag preform قالب under high pressure and performing pre-blowing to obtain a bag preform; transferring the uncooled preform directly to the blow قالبing station of the integrated machine for hot blow قالبing and subsequent cooling to obtain finished المنتجات. Adopting the hot blow process, direct hot forming reduces insoluble particles, enhances product stability, and eliminates preform storage and transfer procedures to lower the risk of foreign substance contamination. المنتجات manufactured by this process feature low shrinkage, high bag elasticity, excellent impact resistance and gas barrier performance, reducing liquid leakage and improving yield. Blow قالبing is completed by utilizing residual heat of preforms without secondary heating, which shortens the قالبing cycle and cuts energy consumption.
البلد Code: CN
mãد: CN
