Continuous polyethylene dissolving process in a double screw extructor to prepare lithium ion cell diaphragm
A technology of twin-screw extruder and lithium-ion battery, which is applied in the direction of secondary battery parts, etc., can solve the problems of uneven micropores and uneven dissolution of the diaphragm, and achieve the effect of uniform hole shape, good strength and simple operation
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specific Embodiment approach 1
[0007] Specific Embodiment 1: The steps of the method for preparing lithium-ion battery separators in this embodiment are as follows: 1. Add ultra-high molecular weight polyethylene, high-density polyethylene and mineral oil together in the continuous batching and feeding kettle 1, at 10 to 60 rpm Mix the raw materials evenly, wherein the mass ratio of ultra-high molecular weight polyethylene and high-density polyethylene is 1:1-15, and the mass ratio of the total mass of ultra-high molecular weight polyethylene and high-density polyethylene to mineral oil 1:5-15; 2. The mixture is continuously added to the twin-screw extruder 2; under the condition of 40-240°C, the ultra-high molecular weight polyethylene and high-density polyethylene are continuously dissolved in the twin-screw extruder 2 Mineral oil, then continuously extruded by twin-screw extruder 2 at a speed of 50 to 250 rpm; 3. The mixture is 1 according to the mass ratio of the total mass of ultra-high molecular weight...
specific Embodiment approach 2
[0010] Specific embodiment 2: In this embodiment, in step 1, the molecular weight of the ultra-high molecular weight polyethylene is 1 million to 8 million. Others are the same as in the first embodiment.
specific Embodiment approach 3
[0011] Specific embodiment three: In this embodiment, in step one, the molecular weight of the ultra-high molecular weight polyethylene is 4.5 million. Others are the same as in the first embodiment.
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