Manufacturing Method of Ordinary Flexible Foam
I. Introduction
Ordinary flexible foam is a kind of chemical widely used in home, automobile, construction and other fields, which has the advantages of light weight, softness, sound insulation and so on. The purpose of this paper is to introduce the manufacturing method of ordinary soft foam, including raw material selection, formula design, production process and other aspects.
II. Raw material selection
1. Polyol
Polyol is one of the main raw materials of soft foam, commonly used polyol, polyether polyol and so on. When choosing polyol, we need to consider its molecular weight, functionality, hydroxyl value and other factors to meet the performance requirements of soft foam. Isocyanate
Isocyanate is another main raw material for soft foam, commonly used diphenylmethane diisocyanate (MDI), toluene diisocyanate (TDI), etc. When choosing isocyanate, it is necessary to consider its molecular weight, functionality, hydroxyl value and other factors to meet the performance requirements of soft foam. Factors such as activity and toxicity need to be considered when selecting isocyanates. Foaming agent
3. Foaming agent
Foaming agent is an indispensable additive in the manufacturing process of soft foam, and commonly used are water, carbon dioxide, hydrochlorofluorocarbons (HCFCs) and so on. When selecting blowing agent, it is necessary to consider its foaming efficiency, stability and other factors. Catalyst
4. Catalyst
Catalyst is used to regulate the foaming speed and gel speed of soft foam, commonly used amine catalyst and tin catalyst. When choosing catalyst, it is necessary to consider its activity, stability and other factors.
Three, formula design
The formula design of soft foam needs to consider the performance requirements of the product, the production process and the cost of raw materials and other factors. Generally speaking, the formula of soft foam is mainly composed of polyol, isocyanate, foaming agent, catalyst, etc., in which the proportion of each component will be adjusted according to specific requirements.
Four, production process
The production process of soft foam mainly includes mixing, foaming, maturing and other steps. The specific process is as follows:
1. Add the raw materials such as polyol, foaming agent and catalyst into the mixer proportionally and mix well.
2. Add isocyanate into the mixer and react with polyol and other raw materials to generate foam.
3. Send the generated foam into the maturing kiln for maturing and hardening to get the final soft foam product.
V. Precautions
1. In the production process, the proportion of raw materials and the order of addition need to be strictly controlled to ensure the performance and quality of the product.
2. It is necessary to carry out regular maintenance and repair of the production equipment to ensure the normal operation of the equipment and the stability of the product.
3. In the maturing process, the maturing temperature and time need to be controlled to avoid overcooking or undercooking of the products.
6. Conclusion
The manufacturing method of ordinary soft foam involves many aspects such as raw material selection, formula design, production process, etc., which needs to comprehensively consider the performance requirements of the product, production cost and production efficiency and other factors. Through reasonable formula design and production process, ordinary soft foam products with excellent performance can be manufactured to meet a wide range of application requirements.
