Manufacturing Method of High Resilience Foam
In the field of raw materials for chemical production, high resilience foam is a widely used product, which is favored for its excellent elasticity, durability and comfort. This article will introduce the manufacturing method of high resilience foam in detail, including raw material selection, formulation design, production process and quality control.
I. Selection of raw materials
1. Polyol: Polyol is the main raw material of high resilience foam, commonly used polyol, polyester polyol and so on. It is crucial to choose the right polyol to improve the elasticity, toughness and durability of the foam.
2. Foaming agent: Foaming agent is the raw material used to produce bubbles, commonly used foaming agents are water, physical foaming agent, etc.. Choosing the right blowing agent can control the pore size and density of the foam and improve the resilience of the foam.
3. Catalyst: Catalyst is used to regulate the foaming and gelation speed of the foam, commonly used catalysts are amine catalysts, tin catalysts and so on. Choosing the right catalyst can make the foam have good fluidity and stability.
II. Formulation design
The formulation design of high resilience foam needs to take into account the performance of raw materials, the proportion and the impact on the foam performance. The following is a typical example of formulation design:
1. polyol: 50 parts
2. blowing agent: 10 parts
3. catalyst: 1 part
4. flame retardant: appropriate amount
5. other additives: appropriate amount
3. production process
The production process of high resilience foam mainly includes steps of mixing, foaming, gelation and maturing. The following is a typical production process:
1. Add polyol, foaming agent, catalyst and other additives into the mixer proportionally and mix well.
2. Pour the mixture into a foaming machine and beat the mixture into foam by means of high pressure air.
3. Pour the foam into the mold and allow it to gel and mature naturally.
4. After maturation is completed, remove the foam from the mold for post-treatment processing, such as cutting and sanding.
4. Quality control
In order to ensure the quality of high resilience foam, strict quality control is required, including testing of appearance quality, resilience, compression permanent deformation, hardness and so on. The following is a typical quality control process:
1. Appearance quality: check whether the surface of the foam is flat and smooth, with or without bubbles, cracks and other defects.
2. Resilience: Test the resilience of the foam through professional testing equipment to ensure that it has good elastic properties.
3. Compression permanent deformation: detect the recovery ability of the foam after compression of a certain proportion, reflecting its durability.
4. Hardness: Test the hardness of the foam by hardness tester to ensure that it meets the usage requirements.
In conclusion, the manufacturing method of high resilience foam requires comprehensive consideration of raw material selection, formulation design, production process and quality control to ensure the quality and performance of the product. In the actual production process, it also needs to be adjusted and optimized according to the specific needs and conditions to continuously improve the production efficiency and quality level.
