Masterbatch/Engineering Plastics/Cable Material/Photovoltaic Film/Dope Dyeing/Lithium Battery Film/
The diaphragm material of lithium battery is mainly polyolefin diaphragm, which has excellent mechanical properties, chemical stability and cost performance. In addition to polyethylene and polypropylene, there are polypropylene + ceramic coating, polyethylene + ceramic coating, and double and triple layer materials based on polypropylene and polyethylene.
The downstream market for diaphragm performance requirements have gradually increased, wet process can better control the diaphragm aperture size, distribution and porosity, so generally used to manufacture high-end films. The domestic diaphragm started late, the technical maturity of domestic enterprises is not high, many enterprises in the wet process is also generally subject to technology and production equipment.
Difficulty of measurement
1. The two resins need to be transported, and the metering process needs to be refueled and cleaned
2. The amount of additives is small, requiring high precision measurement and weighing
3. The raw material composition is liquid, which needs to be heated and measured
Songnai provides a standard weightless feeding and mixing station for raw materials and additives in wet diaphragm process. The mixing station includes powder/particle material transportation, continuous online weightless measurement of powder and liquid raw material formula, and synchronous mixing composition. It is an ideal and mature solution for extruded film processing.
- On-line weightless continuous metering and batching station
- Extrusion cooling system
- Synchronous bidirectional stretching
- Extraction
- Lateral stretching
- Heat treatment
- Coiling and cutting
Typical raw material composition
1. Resin: powder, bulk density 0.5-0.6Kg/L; General mobility
2. Resin: powder, bulk density 0.5-0.6Kg/L; General mobility
3. Additives: mixture, bulk density 0.4-0.5Kg/L; General mobility
4. White oil: liquid, bulk density 0.9-1.0Kg/L
Process of measurement
1. All powdered raw materials in the formula enter the weightless batching station through the FC conveying system, which improves the automation level of the production line
2. The weightless batching station adopts the principle of high-precision continuous measurement and small-batch continuous mixing, which improves the accuracy of measurement and mixing and improves the initial proportion of reduction formula
3. The additive is optimized into independent small batch premixed and then enters the additive weightless feeder. Compared with the traditional premixed process with resin or filling material, the optimized additive ratio quality is higher
4. The white oil liquid is directly injected into the extruder barrel through the spray gun after high-precision continuous measurement of three liquid weight loss feeders, and mixed with other raw materials synchronously, and the distribution is more uniform
- Weightless continuous batching station feeding accuracy of 0.25%, continuous small batch synchronous mixing, high mixing accuracy
- Digital high-precision weighing technology, 50ms sampling frequency effective resolution answer 1:4 '000' 000
- Fast closed-loop speed control technology, flow rate (g/s) control frequency 500ms-1s system control frequency, to ensure the feeding accuracy of ±0.25%
- Mechanical vibration immune technology, which can intelligently distinguish the surrounding short time impact and impact weight on the weighless scale
- Excellent anti-bridge performance, in the face of difficult to feed powder, flow control more accurate and reliable
- Tool-free quick disassembly design, easy to clean and replace
- Good sealing, effectively reduce environmental pollution and dust spill
Sonner Equipment Consultant
Hello! I am Miss Sun. If you need to consult the equipment model or installation and debugging problems, you can add my enterprise wechat, and we will make the measurement process scheme suitable for your enterprise!
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