When plastic film is extruded and moulded, the film blank extruded from the moulding die is generally stretched in order to increase the strength and improve the transparency of the finished product. In practice, also film extrusion stretch moulding refers to the stretch moulding of film sheets formed by the extrusion casting method and the drafting method.

In addition to the performance characteristics of HDPE flat film, the more prominent properties are high tensile strength, high breaking strength and good transparency. This film is widely used in food packaging, especially in the confectionery category for twisted packaging when the application is relatively large.

(1) raw material selection should be selected for unidirectional stretching with high-density polyethylene resin, 3300F-type resin, its density of 0.954g/cm', melt flow rate MFR = 1.2g/10min; can also be used in silk moulding resin 5000S-type, but the resin needs to be added to the 1.5% of the polyethylene oxide octadecylamine as a lubricant.
(2) equipment high-density polyethylene flat film extrusion after the production of unidirectional stretch film forming, this production line in the main components of the equipment are: single-screw extruder, hanger-type (T-type) forming moulds, cooling and shaping of the Kun, hauling device, stretching clip, electrostatic treatment device, cutting device and winding device, and so on.

Nanjing Suminoe Precision Machinery Co., Ltd. has professional sheet production line, the company's main sheet machine manufacturing production line: PET/PRET sheet production line, PP sheet production line, PP vacuum profile extrusion line, PP/PC vacuum sheet production line, PC/PP corrugated sheet production line, PVDF photovoltaic backing sheet production line, PMMA acrylic sheet production line, PE waterproofing membrane production line, high-performance barrier sheet production line. High-performance barrier sheet production line, optical panel production line, multilayer co-extruded sheet production line, etc.