Plastic film refers to polymer synthetic materials as the main raw material, and other auxiliary materials in a certain proportion of uniform mixing, in the plastic moulding machinery and equipment for a certain thickness (thickness of 0.01 ~ 0.25mm), the width and unlimited length of the surface of the flat, smooth and soft plastic products.

1.1 The use of plastic film
Plastic film applications can be seen everywhere: agricultural production for film, greenhouse film and packaging of various agricultural products; industrial production for a variety of industrial products (machinery parts, instruments, household appliances, etc.) packaging, people's daily life in the clothing and food packaging and rain appliances, toys and decorations, etc., a variety of material surfaces (wood, steel, paper, etc.) with the composite film and has a special function of the use of breathable film, water-soluble film, and the use of water-soluble film. The use of plastic films is very wide, such as breathable films, water-soluble films, insulating films, piezoelectric films and radiation protection films. Plastic film in the national economic development and people's daily life occupies an important position. The properties of commonly used plastic films are shown in the table.



1.2 Plastic film forming materials
Polymer materials that can be used to mould plastic films include polyethylene, polypropylene, polyvinyl chloride, polyester, polystyrene, polyvinyl chloride, polyamide, polyvinylidene fluoride, polycarbonate and polyurethane resins. Among them, polyethylene, polypropylene and polyvinyl chloride resins have the largest application, and the plastic film products produced by these three raw materials account for more than 4/5 of the total output of plastic films.

Nanjing Suminoe Precision Machinery Co., Ltd. is a collection of scientific research, production, sales in one of the high-tech enterprises, and has always adhered to the integrity, equality, the interests of the customer first business philosophy, in order to better improve the quality of the equipment, into a more professional and standardised production track. We set up a plastic sheet plate, casting, bi-directional stretching, non-woven nonwoven meltblown cloth, film lamination, renewable granulation environmental protection recycling system and coating machine manufacturing system and other seven categories of equipment, independent research and development technology centre and production departments, to provide a professional full set of technical solutions to meet the special needs of each customer.