1. Dry unidirectional stretching production line;
2. Dry biaxial stretching production line;
3. Wet biaxial stretching production line.
●Dry uniaxial stretching production line
The dry-process uniaxial stretching production line uses PP or PE as the main raw material, mixes various grades of auxiliary materials, and thoroughly stirs them. After extrusion molding via casting, the mixture is multi-layered through a laminating machine and uniaxially stretched. Then, a layering machine and a slitting machine are used to separate and slit the stretched multi-layered separator to produce uniaxially stretched lithium-ion battery separators. Equipped with high-precision testing instruments, it adopts production processes jointly developed with renowned Chinese research institutions and universities, and primarily produces lithium-ion battery separators with thicknesses ranging from 16μm to 40μm.
The large-scale production of lithium-ion power battery separators using the dry uniaxial stretching process can simultaneously stretch multiple layers of base film (total thickness of over 250μm), significantly improving production efficiency while greatly reducing production costs. Each production line can produce films of varying thicknesses and numbers of layers, operates stably, and all functions and performance indicators meet process requirements, earning widespread praise and unanimous acclaim from Cangzhou Mingzhu.
The dry-process uniaxial stretching process lithium-ion battery separator production line has passed acceptance testing. It is mainly used to produce lithium-ion battery separators with thicknesses ranging from 12 to 60 micrometers and various specifications. The products are widely used in power lithium-ion batteries, energy storage lithium-ion batteries and digital lithium-ion batteries.
●Dry biaxial stretching production line
Using PP as the main raw material, various grades of auxiliary materials are mixed and thoroughly stirred. After extrusion molding via casting, the mixture is biaxially stretched, wound, and slit to produce biaxially stretched lithium-ion battery separators. Equipped with high-precision testing instruments and employing production processes jointly developed with renowned Chinese research institutions, the company primarily produces lithium-ion battery separators with thicknesses ranging from 12μm to 40μm.
●Wet biaxial stretching production line
Using PE as the main raw material, various grades of auxiliary materials are mixed and thoroughly stirred. The mixture is then extruded using a casting method, biaxially stretched, and pore-forming through an extraction process. After transverse stretching, it is wound and slit to produce wet-process biaxially stretched lithium-ion battery separators. Equipped with high-precision testing instruments and employing production processes jointly developed with renowned Chinese research institutions, the company primarily produces lithium-ion battery separators with thicknesses ranging from 8μm to 25μm.
The wet-process biaxially stretched lithium-ion battery separator production line uses lithium-ion battery separator materials that can be categorized into several types: woven membranes, nonwoven membranes (non-woven fabrics), microporous membranes, composite membranes, separator paper, and rolled membranes. Polyolefin materials possess excellent mechanical properties, chemical stability, and relatively low cost; therefore, polyolefin microporous membranes such as polyethylene and polypropylene were used as lithium-ion battery separators in the early stages of lithium-ion battery research and development.
