Manufacturing Method of Sealants
I. Introduction
Sealants play a key role in the field of raw materials for chemical production, and are used to prevent leakage of fluids or gases. In this article, the manufacturing method of sealants will be described in detail, including the required raw materials, process steps and precautions.
II. Raw materials and formulations
1. Base polymers: high molecular weight polymers are usually chosen as the base, such as polyurethane, silicone rubber, acrylate, etc.
2. Fillers: such as calcium carbonate, talcum powder, silicon dioxide, etc., used to improve the strength and hardness of the sealant.
3. Plasticizers: such as phthalates, dioctyl sebacate, etc., used to increase the flexibility of sealants.
4. Catalysts: such as organotin compounds, amines, etc., used to promote the curing of sealants.
5. Other additives: such as antioxidants, mold inhibitors, etc., used to improve the durability of the sealant.
3. Manufacturing steps
1. batching: according to the predetermined formula, various raw materials are accurately weighed and added into the high-speed mixer.
2. Mixing: In the high-speed mixer, mix the raw materials well to form a homogeneous mixture.
3. Extruding: Pass the mixture through the extruder head to form the desired shape and size of the sealant.
4. Vulcanization: The extruded sealant is placed in a constant temperature and humidity environment to vulcanize, so as to make it cured and formed.
5. Inspection and packaging: Conduct quality inspection on the vulcanized sealant and package it after passing.
4. Precautions
1. Strictly control the quality of raw materials to ensure the purity and stability of raw materials.
2. In the mixing process, it is necessary to maintain appropriate temperature and stirring speed to prevent the phenomenon of gel or agglomeration.
3. When extruding, choose the appropriate machine head and process parameters according to the product requirements.
4. During the vulcanization process, constant temperature and humidity should be maintained to ensure that the sealant is fully cured.
5. During the whole manufacturing process, attention should be paid to safe production and environmental protection requirements to avoid pollution to the environment.
V. Conclusion
The manufacturing method of sealant involves several links and process parameters, and requires strict control of key steps such as raw material quality, mixing process, extrusion molding and vulcanization. By optimizing the formula and process parameters, sealant products with excellent performance and stable quality can be produced to meet the needs of the field of raw materials for chemical production. At the same time, attention should be paid to safe production and environmental protection requirements during the manufacturing process to ensure the sustainability and environmental friendliness of the products. With the continuous development of science and technology, the manufacturing methods of sealants will be continuously improved and optimized to provide strong support for the development of the field of raw materials for chemicals production.
