Nitriding Rough Geomembrane Technical Introduction
1,Rough geomembrane application area
Geomembrane is an important geosynthetic material, widely used in civil engineering, water conservancy and environmental engineering etc,but,Due to the smooth surface of the geomembrane is smooth, small friction, use easyly to occur in slope displacement, slide, dislocation, seepage control engineering quality.Using rough geomemebrane,Can effectively improve the surface friction resistance, no delamination, rough surface off and so on,Fundamentally solve the problem of slope engineering construction.
二、土工膜糙面成型方法比較
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Serial number |
Forming methods |
Technical introduction |
Features |
|
1 |
Add nitrogen to foam |
Nitrogen source－Nitrogen pressurization－Injection－Flow metering－Mixing(nitrogen mixed with plastic melt)－Extrusion－Foam into rough |
Directly on the blow molding production line forming,low production costs, reliable qualit. Can produce single or double rough geomembrane (thickness 2.5mm, rough surface height 0.25mm),and can produce smooth geomembrane,also can produce smooth welding edge of the rough geomembrane.Rough surface sharp, large friction coefficient, the use of large slope.(The original method of adding water to replace the rough surface smooth, small friction coefficient, the use of small slope.) |
|
2 |
Roll forming |
Raw material mix-Extrusion-Rolled into rough |
Column point is smooth, small friction coefficient, using a small slope,With smooth and rough film the width is fixed and can not be changed.The transverse strength is low. |
|
3 |
Surface spray |
Film heating-Spraying polymer materials-Solidified into rough |
Need two-step process, high production costs.Low adhesion, easy to leave, the use of small slope. |
3,The main technical characteristics:
?。?Composition：Automatic batching and measurementNitrogen pressurized,Nitrogen flow closed-loop automatic control system,High mixing extruder,Light, rough surface control head,IBC bubble automatic control,Spiral-flow type efficient cooling air-ring,Strong rewinding and computer centralized control system.
?。?High pressure nitrogen control device：Using high-pressure nitrogen flow control device,Through special design,can be based on the internal pressure of the extruder,precise control of nitrogen flow,It is mainly composed of high pressure flow metering valve control circuit and the controller composed of two parts,can simultaneously or separately to roughen the extruder continuous nitrogen supply.The flow rate of nitrogen is freely set by the controller panel and is not subject to changes in other process conditions.
?。?Carbon blace diffuser ：The additive amount of carbon black in geomembrane can directly impact the service life of it.Adding a couple rotors and stators in extruder screw and barrel ends,arranging hemispherical holes in certain rule on rotors and stators.When extruder working,three holes on rotors and stators are interlinked in every moment.So the material channel can formed from the inlet to outlet of the disperser.The dispersion ability of the disperser has exponential relationship with axial hole number.Axial three rows of holes disperser,the carbon black dispersion can improve 1000 times.
４,The main specifications：
Product width：6000--8000 mm
Product thickness：2.5mm
Rough surface height：0.25mm
Product structure：Four layers co-extrusion
4,Technical transformation project:
For customers who have purchased three layers of co-extrusion geomembrane blow molding machines, they can carry out technological transformation on the basis of the original unit, replace the inner and outer two-layer extruder screw, increase the high-pressure nitrogen control system, and produce the rough surface geomembrane.
Laiwu Fengliyuan Plastic Machinery Co., Ltd. is committed to adding nitrogen rough surface geomembrane project technology development and service work,can provide new four layers co-extrusion double rough sets (with smooth welding edge), and can provide the old rough technical transformation services unit.
