Cac san pham thoi nen bang phuong phap thoi (blow molding) chong hoa chat theo yeu cau la rat quan trong trong cac nganh cong nghiep ma do an toan va do ben la yeu to hang dau. Thoi nen bang phuong phap thoi la mot quy trinh che tao linh hoat, dung de tao ra cac bo phan nhua rong bang cach thoi mot mang nhua da dun nong (parison) vao ben trong khuon. Khi duoc thiet ke dac biet de chong hoa chat, viec lua chon vat lieu va thiet ke tro nen rat quan trong. Cac vat lieu nhu polyethylene mat do cao (HDPE), polypropylene (PP), polyvinyl chloride (PVC) va polyvinylidene fluoride (PVDF) thuong duoc su dung do tinh trung tinh cua chung voi nhieu loai hoa chat. Vi du, HDPE co kha nang chong lai axit, bazo va ruou, nen rat phu hop cho cac thung cong nghiep va binh chua nhien lieu. PVDF cung cap kha nang chong lai cac dung moi manh mot cach vuot troi va thuong duoc su dung trong cac ung dung y khoa va ban dan. Tai Cong ty Co phan Bo phan O to Changzhou Pengheng, chung toi van dung kinh nghiem chuyen sau de lua chon vat lieu toi uu dua tren muc do tiep xuc voi hoa chat cua quy khach. Chung toi cung xem xet cac yeu to khac nhu nhiet do, ap suat va ung suat co hoc.
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