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[Chemical Knowledge]：Manufacturing method and process of PP non-woven fabric

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The manufacturing method
of PP non-woven fabric
1. Introduction

PP non-woven fabric is a kind of non-woven material widely used in the field of chemical production, with excellent physical properties and chemical stability. This paper will introduce the manufacturing method of PP non-woven fabric in detail, including the selection of raw materials, production process, equipment configuration and so on.

2. Raw Material Selection

1. Polypropylene Resin: Polypropylene resin is the main raw material of PP non-woven fabric. Polypropylene resin with high molecular weight and high melt index should be selected to improve the strength and toughness of non-woven fabric.
2. Additives: According to needs, some functional additives can be added, such as antioxidants, lubricants, antistatic agents, etc., to improve the performance of non-woven fabrics.

3. production process

The manufacturing process of PP non-woven fabrics mainly includes melt extrusion, stretching, web forming, hot pressing and other links. The specific steps are as follows:

1. Melt extrusion: After mixing the polypropylene resin and additives in proportion, it is melted and extruded through a screw extruder to form a continuous sheet melt.
2. Stretching: The extruded sheet melt is subjected to one-way or two-way stretching by stretching equipment to orient its molecular chain and improve its strength.
3. Reticulation: The stretched melt passes through a cooling device to form a fiber reticular structure.
4. Hot pressing: The fiber mesh structure is heated and pressurized by a hot press to make it fixed and molded to obtain a PP non-woven fabric.

4. equipment configuration
The production of
PP non-woven fabrics needs to be equipped with the following equipment:

1. Screw extruder: used for melt extrusion of polypropylene resin and additives.
2. Stretching equipment: used to stretch the melt and improve its strength.
3. Cooling device: used to cool the melt after stretching to form a fiber network structure.
4. Hot press machine: used for heating and pressurizing the fiber network structure to make it fixed and molded.
Precautions for
5.

1. In the production process, each process parameter should be strictly controlled to ensure stable product quality.
2. Regular maintenance and maintenance of equipment to ensure normal operation of equipment and improve production efficiency.

6. product application

PP non-woven fabric has excellent physical properties and chemical stability, and is widely used in filtration, packaging, heat preservation and other aspects of chemical production. For example, in the field of filtration, PP non-woven fabrics can be used as filter materials for liquid filtration, air filtration, etc.; in the field of packaging, PP non-woven fabrics can be used as packaging materials for packaging and protection of items; in the field of insulation, PP non-woven fabrics can be used as insulation materials for pipes and equipment insulation.

7. development prospects

With the continuous progress of science and technology and the continuous expansion of application, PP non-woven fabrics in the field of chemical production application prospects are more and more broad. In the future, with the continuous emergence of new technologies and new materials, the manufacturing process and performance of PP non-woven fabrics will be further improved, providing more possibilities for the development of chemical production.

8. conclusion

In conclusion, PP non-woven fabric as an important non-woven material has a wide range of applications in the field of chemical production. By selecting appropriate raw materials, optimizing the production process, and rationally configuring equipment, high-quality PP non-woven fabrics can be manufactured, which provides strong support for the development of chemical production.

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