Phenol ketone products

Plastic rubber

Current Location： Home > News > Chemical Knowledge > PP (fiber) production and manufacturing methods and processes

[Chemical Knowledge]：PP (fiber) production and manufacturing methods and processes

Read： 547 Time：20months ago Source：Transform the World with Simplicity

PP (polypropylene) fiber manufacturing method

1. Introduction

PP fiber is a widely used in the field of chemical production of synthetic fibers, with excellent physical properties and chemical stability. This article will introduce the manufacturing method of PP fiber in detail, including raw material preparation, polymerization reaction, spinning, drawing and post-processing.

2. Raw Material Preparation

1. Monomer: Propylene is the main monomer for the production of PP fiber, requiring high purity, generally more than 99.5%.
2. Initiators: Initiators are used to initiate the polymerization of monomers, and organic peroxides and azo compounds are commonly used.
3. molecular weight regulator: used to control the molecular weight of PP, commonly used is hydrogen.

3. Polymerization

Polymerization Generally, solution polymerization or suspension polymerization is employed. Solution polymerization is the polymerization of monomers, initiators, etc. in a solvent to obtain a high molecular weight PP solution; suspension polymerization is carried out in water, and the monomers are polymerized under the action of the initiator to generate PP particles.

4. spinning

spinning is the process of converting PP solutions or particles into fibers. Melt spinning or solution spinning is generally employed. Melt spinning is the PP particles heated to melt, through the spinneret extrusion, cooling in the air solidified into fiber; solution spinning is the PP solution through the spinneret extrusion, solvent volatilization after fiber.

5. stretching

stretching is an important process to improve the strength and elasticity of PP fiber. The stretching is generally carried out in hot water or hot air, and the strength and elasticity of the fiber are improved by orienting the molecular chains of the fiber.

6. post-treatment

post-treatment includes washing, drying, winding and other processes to remove impurities on the surface of the fiber and improve the quality of the fiber.
Precautions for
7.

1. Strictly control the quality and proportion of raw materials to ensure the smooth progress of the polymerization reaction.
2. During the spinning process, maintain an appropriate temperature and drawing speed to ensure the quality and output of the fiber.
3. In the post-treatment process, pay attention to the temperature and time of washing and drying to avoid damage to the fiber.

8. conclusion The manufacturing method of

PP fiber includes raw material preparation, polymerization, spinning, drawing and post-processing, and each process needs to strictly control the process parameters to ensure the quality and yield of the fiber. Through the introduction of this article, I hope it will be helpful for readers to understand the manufacturing method of PP fiber.

Previous： Production and manufacturing method and process flow of PP (wire drawing)

Next： Production and manufacturing method and process flow of PP (meltblown)

News Categories