A Brief Introduction to Plastic Blow Molding in Jiangsu Province-Blow Molding Factory China | KTK

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A Brief Introduction to Plastic Blow Molding in Jiangsu Province

Release time:

2023-01-07

Blow molding, also known as hollow blow molding, is a rapidly evolving plastic-processing technique. During World War II, this process was used to produce low-density polyethylene bottles. By the late 1950s, with the advent of high-density polyethylene and advances in blow-molding equipment, the technology gained widespread adoption. Hollow containers can now reach capacities of several thousand liters, and some production lines are fully computer-controlled.

　　Jiangsu blow molding, also known as hollow blow molding, is a rapidly evolving plastic‑processing technique. During World War II, the blow‑molding process was employed to produce small low‑density polyethylene bottles. By the late 1950s, with the advent of high‑density polyethylene and advances in blow‑molding equipment, the technology gained widespread adoption. Hollow containers can now reach capacities of several thousand liters, and some production lines are fully computer‑controlled. Blow molding is suitable for a variety of plastics, including polyethylene, polyvinyl chloride, polypropylene, and polyester; the resulting hollow containers are extensively used as industrial packaging. Based on the parison‑forming method, Jiangsu blow molding can be categorized into extrusion blow molding, injection blow molding, as well as the more recently developed multilayer blow molding and stretch blow molding.

　　Thermoplastic resins are extruded or injection‑molded into tubular parisons. When heated—either by direct heat or to a softened state—the parison is placed in an open mold, and compressed air is immediately introduced to inflate it against the mold cavity, conforming it to the inner wall of the mold. After cooling, hollow products of various shapes are obtained. The manufacturing process of blow molding is very similar to that of hollow products, except that no mold is used during the forming stage. From the perspective of blow‑molding process classification, extrusion‑blow molding typically includes film‑blowing processes. During World War II, blow molding was employed to produce low‑density polyethylene vials. By the late 1950s, with the advent of high‑density polyethylene and advances in blow‑molding equipment, this technology found widespread application. Hollow containers can now reach capacities of several thousand liters, and some production lines are fully computer‑controlled. Blow molding is suitable for plastics such as polyethylene, polyvinyl chloride, polypropylene, and polyester, and the resulting hollow containers are widely used as industrial packaging.

　　Extrusion blow molding is a process used to manufacture hollow thermoplastic parts. Well-known blow-molded products in Jiangsu include bottles, buckets, cans, and containers for food, beverages, cosmetics, pharmaceuticals, and household goods. Large blow-molded containers are commonly employed to package chemicals, lubricants, and bulk materials. Other blow-molded items encompass balls, bellows, and toys. In the automotive industry, fuel tanks, shock absorbers, seat backrests, center consoles, armrests, and headrest covers are all produced via blow molding. For the machinery and furniture sectors, blow-molded components can be found in fencing, door frames, structural frameworks, ceramic pots, or open‑topped boxes.

　　The most common raw material used in blow molding in Jiangsu is high-density polyethylene, and most baby bottles are made from this polymer. Other polyolefins are also frequently processed by blow molding. Depending on the application, styrene polymers, polyvinyl chloride, polyesters, polyurethanes, polycarbonates, and other thermoplastics may also be employed in blow molding.

　　Engineering plastics are widely adopted in the automotive industry. Our material selection is primarily guided by criteria such as mechanical strength, weather resistance, electrical properties, optical performance, and other relevant characteristics.

　　