Preparation method of multilayer compound polymer micro-porous film
A composite polymer and multi-layer composite technology, which is applied in nanotechnology, electrical components, electrochemical generators, etc. for materials and surface science, can solve problems such as low efficiency and complex film-making process, and achieve high efficiency, Simple preparation process and excellent performance
Inactive Publication Date: 2017-06-13
宁波科乐新材料有限公司
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Abstract
The invention relates to a preparation method of a multilayer compound polymer micro-porous film in the field of battery diaphragms. The method comprises the following steps: a, melting and extruding polyethylene and polypropylene respectively through an extruder, wherein the flowing rate of polyethylene melt is 0.1-2g per/10min, the density of the polyethylene melt is 0.95-0.964g/cm<3>, the flowing rate of the polypropylene melt is 0.2-2.5g/10min, the polyethylene melt and the polypropylene melt are compounded in a T-shaped neck mould to form 2-5 layers of compound sheets with thickness of 1.5-4.5mm; b, carrying out wind blade cooling on the compound sheets in the step a at the temperature of 50-100 DEG C; c, drawing the compound sheets in the step b through a film winding machine to obtain a polyolefin film; and d, annealing the polyolefin film, drawing the polyolefin film in one direction, and shaping to obtain the multilayer compound polymer micro-porous film with a micro-porous structure. The preparation method of the multilayer compound polymer micro-porous film is simple and is high in efficiency; and the prepared micro-porous film is excellent in performance.
Application Domain
Material nanotechnologySecondary cells +1
Technology Topic
PolypropylenePolyolefin +6
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PUM
Property | Measurement | Unit |
The melt flow rate | 0.1 ~ 2.0 | g/10min |
Density | 0.95 ~ 0.964 | g/cm³ |
The melt flow rate | 0.2 ~ 2.5 | g/10min |
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