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[Chemical Knowledge]：The production and manufacturing method and process of polyurethane accessories.

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Polyurethane Accessories Manufacturing Methods

1. Introduction

Polyurethane materials have been widely used in the field of chemical production raw materials because of their excellent properties, such as wear resistance, impact resistance, water resistance, etc. In order to meet different production needs, the manufacture of high quality polyurethane accessories has become the key. This article will introduce the manufacturing method of polyurethane accessories in detail.

2. Manufacturing Method

1. Ingredient

First, according to the predetermined formula ratio, the polyol, diisocyanate, chain extender, catalyst, flame retardant and other raw materials are prepared. The quality and purity of these raw materials have a great influence on the quality of polyurethane accessories, so they need to be strictly controlled.

2. mixing

mix the polyol and diisocyanate in the ingredients according to a certain proportion, add the chain extender, catalyst, etc., and stir at high speed to make it fully mixed. The mixing process needs to control the temperature and stirring speed, so as not to affect the quality of the product.

3. ripening

put the mixed materials into the ripening equipment for ripening, and the ripening time and temperature shall be set according to the product requirements. During the curing process, attention should be paid to keeping the environment clean and dry to prevent the product from being contaminated.

4. defoaming

after the completion of aging, the need to take out the bubbles in the material. Generally, vacuum defoaming can effectively improve the quality and appearance of the product.

5. Pouring

After the defoaming is completed, pour the material into a predetermined mold, pay attention to control the pouring speed and mold temperature, so as not to affect the molding and performance of the product.

6. Curing

After pouring is completed, the mold is placed in the curing equipment for curing. The curing process needs to control the temperature and time to ensure that the product is fully cured to achieve the best performance.

3. precautions

1. During the manufacturing process, various process parameters, such as temperature, time, stirring speed, etc., must be strictly controlled to ensure product quality.
2. The quality and purity of raw materials have a great influence on the quality of products and need to be strictly controlled.
3. Keep the environment clean and dry during the manufacturing process to prevent product contamination.
4. The defoaming and curing process is a key step to ensure product quality and requires special attention.

4. conclusion

polyurethane accessories have a wide range of application prospects in the field of chemical production raw materials, and mastering their manufacturing methods is of great significance to improve product quality and reduce costs. Through strict proportion control, scientific mixing process, reasonable curing time and temperature setting, effective defoaming treatment and standard pouring and curing operation, polyurethane accessories with excellent performance can be produced to meet different production needs.

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