Why Jiwei Rotary Paddle Switch is the First Choice for Level Measurement of Hot-Melt Adhesive Powder

Hot-melt adhesive powder is a translucent granular fine chemical. In its production process, a material level measuring instrument is needed to measure and control the level of hot-melt adhesive powder. Among many level switches, Jiwei rotary paddle switch is the first choice for this application. Why is so?

 

Hot-melt adhesive powder

Hot-melt adhesive powder is generated in chemical reaction of isophthalic acid and polyethylene glycol in a reactor and produced through processed of crushing, dehydration and grounding etc. The specific production process of hot-melt adhesive powder is as the chart below:

 

Schematic diagram of hot-melt powder production process

Because of strong chemical stability, high viscosity and odorless, hot-melt adhesive powder has been widely used for clothing, automotive interiors and rotomolding products such as large containers, water tanks, toys, thermal insulation boxes etc. In the production process, accurate measurement is required for high and low material levels of the finished product. According to the properties of hot-melt adhesive powder, there are some special requirements for the measuring instrument as follows: 

The hot-melt adhesive powder makes the working conditions extremely harsh. If the sealing of the instrument is not good enough, it will affect the operation stability of the instrument. Further, the ingress protection rating of the instrument should be above IP65.

Combustible dust explodes when three conditions are all met: a) the dust itself is explosive; b) dust is suspended in the air and mixed with the air to an explosive concentration; c) there is a fire source that is sufficient to cause dust explosion.

Because the fineness of hot-melt adhesive powder in this application is about 40 ～ 80 mesh, there is a risk of  explosion. Therefore, the instrument used for this application must be with dust explosion protection certificate to ensure the safe operation.

3. Key performance comparison between different material level switches

Key performance comparison between different material level switches

From the above table, it is not difficult to see that among several common level switches, Jiwei rotary paddle switch stands out of the list with excellent performance and high cost-effective ratio. It is an ideal choice for hot-melt adhesive powder level measurement. Moreover, Jiwei Spin-11 rotary paddle switch has its unique features and advantages over other brands.

In order to better understand the features and advantages of Jiwei rotary paddle switch, we take the standard Spin-11A rotary paddle switch as an example to explicit further.

 

Jiwei Rotary level switch

6) Integrated design of motor and mechanical control, simple maintenance and replacement

Jiwei Spin-11A standard rotary paddle switch is made of 304 / 316L stainless steel or carbon steel. It is suitable for a majority of solid granular powders. Compared with other similar domestic products, it has higher reliability thanks to Jiwei´s full-process production management and quality inspection.