Film calendering process characteristics
DATE：2019/11/11 8:56:21 / READ： / SOURCE：This station
Film calendering process characteristics
The raw and auxiliary materials required for calendering of the film are mixed and masticated at a constant temperature and pressure, and then a calender consisting of two or more rotating rolls in opposite directions is introduced, and the melt is melted from the roll. The slit is extruded into a continuous film or sheet of a predetermined size, which is called calendering. The thickness of the calendered film is determined by the roll gap and the subsequent draw ratio.
Calendered film, including soft PVC calendered film, hard PVC calendered film (sheet), polyethylene calcium plastic corrugated box sheet (face sheet, corrugated sheet), may also include calendered composite materials, such as plastic floor leather, plastic Wallpaper, artificial leather, etc.
Film calendering characteristics
The calendering of the film generally comprises three parts: preparation and mixing of raw and auxiliary materials, calendering, subsequent treatment of calendering, and the like.
(1) Preparation and mixing of raw and auxiliary materials
Acceptance of raw and auxiliary materials, resin screening, powder refining, material metering, high-speed (heat) mixing, cold mixing, mixing, feeding to calenders, etc.
(2) Calendering, rolling, drawing, cooling, cutting, coiling, etc.
(3) Post-rolling subsequent processing ginning, printing, expanding (stretching tenter).
The items of the calendering subsequent treatment are determined by the use (or function) of the film, and the calendering and subsequent treatment of the film are continuously performed on the same production line.
Compared with extrusion molding, film calendering has the following characteristics:
1) The film quality is stable, the thickness is uniform, and the deviation is small;
2) The degree of automation of the molding equipment is high, and the linkage operation of the production line can be realized;
3) The film has high line speed, large processing capacity and high output;
4) It is especially suitable for the molding process of heat sensitive plastics (such as polyvinyl chloride) film;
5) The width of the film is limited by the width of the calender roll (generally up to 4 m), even if the film is stretched and stretched, its maximum width is about 6 m;
6) There are many calendering and forming processes, the production line is long, the equipment is huge, the investment cost is high, and the equipment maintenance requirements are also high, which limits the production development.
The raw and auxiliary materials required for calendering of the film are mixed and masticated at a constant temperature and pressure, and then a calender consisting of two or more rotating rolls in opposite directions is introduced, and the melt is melted from the roll. The slit is extruded into a continuous film or sheet of a predetermined size, which is called calendering. The thickness of the calendered film is determined by the roll gap and the subsequent draw ratio.
Calendered film, including soft PVC calendered film, hard PVC calendered film (sheet), polyethylene calcium plastic corrugated box sheet (face sheet, corrugated sheet), may also include calendered composite materials, such as plastic floor leather, plastic Wallpaper, artificial leather, etc.
Film calendering characteristics
The calendering of the film generally comprises three parts: preparation and mixing of raw and auxiliary materials, calendering, subsequent treatment of calendering, and the like.
(1) Preparation and mixing of raw and auxiliary materials
Acceptance of raw and auxiliary materials, resin screening, powder refining, material metering, high-speed (heat) mixing, cold mixing, mixing, feeding to calenders, etc.
(2) Calendering, rolling, drawing, cooling, cutting, coiling, etc.
(3) Post-rolling subsequent processing ginning, printing, expanding (stretching tenter).
The items of the calendering subsequent treatment are determined by the use (or function) of the film, and the calendering and subsequent treatment of the film are continuously performed on the same production line.
Compared with extrusion molding, film calendering has the following characteristics:
1) The film quality is stable, the thickness is uniform, and the deviation is small;
2) The degree of automation of the molding equipment is high, and the linkage operation of the production line can be realized;
3) The film has high line speed, large processing capacity and high output;
4) It is especially suitable for the molding process of heat sensitive plastics (such as polyvinyl chloride) film;
5) The width of the film is limited by the width of the calender roll (generally up to 4 m), even if the film is stretched and stretched, its maximum width is about 6 m;
6) There are many calendering and forming processes, the production line is long, the equipment is huge, the investment cost is high, and the equipment maintenance requirements are also high, which limits the production development.
Author：admin