I. Production of polythene heat-shrinkable filmThe production of polyethylene heat-shrinkable film for packaging can be carried out either by the single-bubble method (direct blow-moulding, with only one blister) or by the double-bubble method (firstly making a blank film, which is then heated an

I. Heating and cooling systemThe heating and cooling system of the extruder mainly refers to the heating and cooling of the barrel (also including the moulding die and screw) in the extrusion plasticizing system. The purpose of barrel (moulding die and screw) heating or cooling is to control the pro

Various processing techniques have been developed to produce unidirectional and bi-directional stretch PET films. Typical processing includes the following steps:① Extrusion of PET using a hanger type die.② Quenching stage;③Deformation stage;④ Post-processing stage.At the beginning of the process, t

1. Thinning of the filmCurrently used the thinnest PET film thickness of about 0.5 μm, it is much thinner than other films, for example, bi-oriented PP film is 3 μm thick, polycarbonate (PC) film thickness of 2 μm, PE film thickness of 8 μm. Suitable for the production of thinner films is the bi-dir

I. Introduction of Coating MachineCoating machine is a professional equipment that can make, coat and bond many kinds of materials. Coating machine is widely used in various industries, such as textile, printing, packaging and so on. Coating machine has a variety of functions, can achieve automatic