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[Chemical Knowledge]：Manufacturing method and process of plastic foaming agent

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The manufacturing method
of plastic foaming agent
1. introduction

plastic foaming agent is an important part of the field of chemical production raw materials, widely used in insulation, packaging, construction and other fields. With the continuous development of science and technology, the performance requirements of plastic foaming agent are also increasing, so it is of great practical significance to study its manufacturing method. This article will introduce the manufacturing method of plastic foaming agent in detail, aiming to improve the performance of foaming agent and meet different application requirements.

2. plastic foaming agent type and performance requirements

1. type: plastic foaming agent mainly includes physical foaming agent and chemical foaming agent two categories. Physical blowing agents generate gas mainly through physical changes, while chemical blowing agents generate gas through chemical reactions.
2. performance requirements: plastic foaming agent should have good foaming effect, stability, environmental protection, economy and other characteristics.

3. plastic foaming agent manufacturing method

(I) physical foaming agent manufacturing method

1. Compressed gas method: air, nitrogen and other gases are compressed and injected into the plastic to form a foam. This method is simple, but the foaming effect is not stable.
2. Dissolution method: an inert gas is dissolved in a solvent to form a homogeneous solution, and then the solvent is volatilized by a method such as decompression or heating to generate bubbles. This method results in a uniform and fine foam.

(II) Chemical foaming agent Manufacturing method

1. Blowing agent mixing method: Two or more chemical substances are mixed in a certain proportion to produce a chemical reaction to produce a gas, thereby forming a foam. The foaming effect of this method is better, but it is necessary to pay attention to control the reaction speed and the amount of foaming agent.
2. Internal and external mixing method: Two or more chemical substances are placed in different levels of the plastic, and chemical reactions occur during the processing to produce gas and form foam. This method results in a uniform and density-controlled foam.
Precautions in the manufacturing process of
4. plastic foaming agent

1. Control the amount of foaming agent: According to the specific needs and the performance of the foaming agent, reasonably control the amount of foaming agent to achieve the best foaming effect.
2. Control the reaction speed: For chemical foaming agents, it is necessary to control the reaction speed to avoid too fast reaction leading to foam rupture or too slow reaction affecting the foaming effect.
3. Pay attention to environmental protection: When choosing a foaming agent, environmental protection should be given priority to avoid environmental pollution.
4. Improve stability: In order to improve the stability of plastic foaming agents, stabilizers or other additives can be appropriately added.

5. conclusion

the manufacturing method of plastic foaming agent is of great significance to improve the performance and application range of foaming agent. In the actual production process, the appropriate manufacturing method should be selected according to the specific needs and the type of foaming agent, and the process parameters should be strictly controlled to ensure that high-quality plastic foaming agent is obtained. At the same time, with the continuous progress of science and technology, new manufacturing methods and technologies can be further explored in the future to meet the growing market demand.

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