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[Chemical Knowledge]：Production and manufacturing method and process flow of PP (meltblown)

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In the field of chemical production raw materials, PP (meltblown) is a common plastic product, which is widely used in masks, filter materials, non-woven fabrics and other fields. The following is the manufacturing method of PP (meltblown):

1. raw material preparation

The manufacture of PP (meltblown) first needs to prepare raw materials, mainly polypropylene resin. Polypropylene resin has the characteristics of high molecular weight, low melting point, good chemical resistance, and is an ideal material for the manufacture of PP (meltblown).

2. Melt Extrusion

Polypropylene resin is fed into an extruder, and the resin is melt-plasticized by heating and screw extrusion. The molten resin passes through the extruder head to form a certain shape of the melt, laying the foundation for the next step of stretching. The

3. the stretching

the molten resin from the extruder head to enter the stretching device. Here, the melt is rapidly drawn into fibers, while the fibers are rapidly cooled and solidified. During the drawing process, the melt is refined and the microstructure of PP (meltblown) is formed.

4. collection

after stretching and cooling solidification of PP (meltblown) fiber is collected to form a non-woven fabric of a certain thickness and density. During the collection process, electrostatic adsorption and other methods can be used to improve the collection efficiency of the fibers.

5. post-processing

collected PP (meltblown) non-woven fabrics can be post-processed, such as hot pressing, cutting, packaging, etc., to meet different needs.

The above is the basic manufacturing method of PP (meltblown). The specific production process and equipment will vary according to different product types and quality requirements. At the same time, in order to ensure the quality and performance of the product, it is necessary to strictly control and adjust the production process.

In short, the manufacture of PP (meltblown) requires certain technical and equipment support. Through scientific production processes and strict quality control, high-quality PP (meltblown) products can be produced for the development of chemical production raw materials. Contribute.

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