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[Chemical Knowledge]：Production and manufacturing method and process flow of ordinary soft foam

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The manufacturing method
of ordinary soft foam
1. Introduction

Ordinary soft foam is a chemical product widely used in the fields of home, automobile, construction, etc., with the advantages of light weight, softness, and sound insulation. The purpose of this paper is to introduce the manufacturing method of ordinary soft foam, including raw material selection, formula design, production process and so on.

2. raw material selection

1. polyol
polyol is one of the main raw materials of flexible foam, commonly used polyols, polyether polyols and so on. Factors such as molecular weight, functionality, and hydroxyl value need to be considered when selecting polyols to meet the performance requirements of flexible foams.
2. Isocyanate
Isocyanate is another main raw material of flexible foam, commonly used are diphenylmethane diisocyanate (MDI), toluene diisocyanate (TDI) and so on. Isocyanates need to be selected considering their activity, toxicity and other factors.
3. foaming agent
foaming agent is an essential additive in the manufacturing process of flexible foam, commonly used in water, carbon dioxide, chlorofluorocarbons and so on. When selecting a foaming agent, it is necessary to consider its foaming efficiency, stability and other factors.
4. catalyst
catalyst is used to adjust the foaming speed and gel speed of flexible foam, and amine catalyst and tin catalyst are commonly used. When selecting a catalyst, it is necessary to consider its activity, stability and other factors.

3. formulation design

flexible foam formulation design needs to consider the performance requirements of the product, the production process and the cost of raw materials and other factors. Generally speaking, the formulation of flexible foam is mainly composed of polyol, isocyanate, blowing agent, catalyst, etc., and the proportion of each component will be adjusted according to specific requirements.

4. production process

soft foam production process mainly includes mixing, foaming, aging and other steps. The specific process is as follows:

1. the polyol, foaming agent, catalyst and other raw materials are added into the mixer according to the proportion and stirred evenly.
2. Isocyanate is added to the mixer and reacted with polyol and other raw materials to generate foam.
3. The resulting foam is sent to a curing kiln for curing and hardening to obtain the final flexible foam product.
Precautions for
5.

1. In the production process, it is necessary to strictly control the proportion and addition sequence of raw materials to ensure the performance and quality of the product.
2. It is necessary to regularly maintain and maintain the production equipment to ensure the normal operation of the equipment and the stability of the product.
3. In the curing process, it is necessary to control the curing temperature and time to avoid the phenomenon of overcooked or undercooked products.

6. conclusion

ordinary flexible foam manufacturing method involves raw material selection, formula design, production process and other aspects, need to consider the product performance requirements, production costs and production efficiency and other factors. Through reasonable formula design and production process, ordinary flexible foam products with excellent performance can be manufactured to meet a wide range of application requirements.

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