PE BREATHABLE FILM PRODUCTION LINE
PE BREATHABLE FILM PRODUCTION LINE
The PE Breathable Film Production Line use PE air-permeable plastic granules as raw material, and uses an extrusion casting method to melt-extrude the PE-modified air-permeable plastic granules containing inorganic filler through a flat die, and the roller is stretched at a high rate to produce a sub-nanometer micro Porous membrane.
Since the fight against the pneumonia epidemic caused by the novel coronavirus, as companies gradually resume work, the shortage of medical protective products has eased, but there is still a gap. In particular, as a “teater” protective suit for medical staff, it is generally replaced every 4 hours, which is in great demand. provides PE Breathable Film Production Line for manufacturers
Disposable medical protective clothing materials need to meet the requirements of “three resistance and one resistance” (that is, water repellent, blood repellent, alcohol repellent, and antistatic) requirements of micro-nano grade materials. This composite material can be combined with different materials, such as polyethylene/polypropylene spun-bonded nonwoven fabric, combined with breathable microporous film or other nonwoven fabric, or spun lace nonwoven fabric combined with breathable microporous film, or Wooden paddle composite spun lace nonwoven fabric. In addition, some membranes made of PTFE can be used for high-end protective clothing fabrics. In the composite of these materials, the breathable microporous film is particularly important.
The so-called breathable film is a kind of functional inorganic product that is uniformly mixed into the polyolefin raw material, so that the product has pores due to high stretching during the film formation process, so as to have the function of breathability and moisture transmission; the function of the breathable film In short: Waterproof and breathable (moisture), take the most commonly used PE as a carrier as an example.
The principle of breathability
The principle is very simple: inorganic matter + stretching = micropores. In fact, the operation is very particular. Only micropores with proper size and uniform distribution are effective
insufficient stretching and too small pore size, insufficient stretching and no pore size, poor stretching, and insufficiently sized micropores can only be waste products.
Basic film-forming principle of breathable film
The film-forming principle of the breathable film: PE+CaCO3 (masterbatch) — film formation — stretching — breathable film
PE breathable film is blended with LDPE/LLDPE polyethylene resin carrier by adding about 50% of special calcium carbonate, and then oriented and stretched to a certain ratio after being extruded into a film. Since polyethylene resin is a thermoplastic plastic material, it can be stretched and crystallized under certain conditions. During stretching, the interface between the polymer and the calcium carbonate particles will be peeled off, and the interconnected serpentine pores are formed around the calcium carbonate particles. Or channels, it is these pores and channels that give the film a breathable (wet) function, thereby communicating the environment on both sides of the film.
The mechanism of action of a breathable membrane
When the water vapor concentration on one side of the film is greater than the environment on the other side of the film, a humidity gradient pressure difference is formed. This provides the basic conditions for gas (vapor) convection. Due to the formation of convection, the humidity environment on both sides of the film tends to be relatively balanced.
The breathable membrane is used as a water-proof membrane, which has a barrier effect on liquids. Because of the many passages in the membrane, the tortuous channel formed by it has a large “L/D” value, which can be understood as a capillary. Therefore, under the same liquid (such as water) and the same pressure, as long as the height of the liquid column of the capillary is less than the length of the capillary, it can be ensured that the liquid will not leak out.
The production line use PE air-permeable plastic granules as raw material, and uses an extrusion casting method to melt-extrude the PE-modified air-permeable plastic granules containing inorganic filler through a flat die, and the roller is stretched at a high rate to produce a sub-nanometer micro Porous membrane.
PE Breathable Film Production Line
Model: 130-1800
General：
1.Utility source：
Electric Power Supply: All Cabinets(including main power supply and control) and all internal cables will be supplied by the seller, buyer’s responsibility is for external cables and cable frame to main panel/input power position of sheet extrusion machine)
Mains input 3×380V (Volt)
Fluctuation max ≦+/-15%
Frequency 50HZ
Fluctuation max +/-1.5HZ
Cooling water supply: water used on machinery in closed or open-loop circuits must follow the general requirement: clean filtered and free of sediments.
Supply temperature 30℃
Supply pressure 0.2～0.3Mpa
Pressure variation +/-0.5bar
Return pressure average 1.5bar
consumption capacity 20-30m3/h
Compressed air supply: clean, free of oil, dust, and water
supply pressure at the point of use 0.5～0.7Mpa
Pressure variation +/-1%
Consumption capacity 0.9 m3/h
2.Technica Data:
Extruder (S130/36) PE+CaCo3 pellet
Design output 500-600 Kg/h
Finished product width 1800 mm
Product thickness 0.015-0.05 mm
Deviation ±5%%
Design maximum linear speed 200 m/min
Production speed 120-150 m/min
Total installed power 700 KW
Total length of production line 24 meter
Maximum production line width 8 meter
The total maximum height of the production line 5 meter
3.Equipment list
Feeder system 1set
130/36Extruder 1set
Screen changer 1set
Gear pump 1set
T-die 1set
Castingroller calender 1set
cooling forming system1set
Thickness gauge system1set
Horizontal stretching machine 1set
Corona treatment system 1set
Haul-off unit 1set
Defect detection system 1set
Take/off and Film trimming system 1set
Disc type double station winder 1set
Trimming waste recycling system 1set
Electrical control system 1set
Spare parts 1set
Details
1.Feeder system
Vacuum negative pressure suction machine Max capacity 500-600kg/h
Suction motor power 5.5kw
The suction pipe adopts stainless steel fixed pipeline, and the feeding site is tidy
2.Extruder
Specification model 130/36 TQM
Design capacity Max: 500-600kg/h
Screw and barrel type screw and barrel, manufactured by the introduction of German technology, made
Screw diameter Φ130mm
Screw length to diameter ratio 36:1
Main motor power AC 200KW
Main motor brand Siemens Beide or Brazil WEG AC motor
Gearbox adopts integral box body, hard tooth surface, high torque, vertical structure
Gearbox brand domestic high-quality gearbox General Factory