What is the hot melt connection principle of PPR Pipe Union?

In modern construction, industrial and civil water supply and drainage systems, PPR pipes are favored for their good chemical stability, high temperature resistance and good processing characteristics. As an indispensable connection component in the PPR pipe system, the hot melt connection technology of PPR Pipe Union has become a standard practice in the industry because of its high efficiency and reliability.

Hot melt connection is to heat the contact surface of two identical or compatible thermoplastic materials to a molten state, and then fit the two tightly under the action of external force, and form a firm and sealed connection after cooling. In this process, temperature, time and pressure are the key factors to control the quality of the connection.

The connection part of PPR pipe and PPR Pipe Union is heated by a special hot melt machine. The hot melt machine is equipped with a heating element inside, which can quickly heat the connection part to the melting temperature of PPR material. At this stage, the heating temperature and time need to be strictly controlled to ensure that the material can be fully melted and will not be degraded or deformed due to overheating. When the connection part reaches a molten state, its molecular chains begin to become active and the attraction between each other increases. At this time, quickly insert the PPR pipe into the PPR Pipe Union, and use external force to make the molten surfaces of the two fit closely. In this process, the molten PPR material will quickly diffuse and penetrate on the contact surface to form a uniform molten layer. This molten layer will solidify after cooling and become a strong bond connecting the PPR pipe and the PPR Pipe Union. After the fusion of the molten surface is completed, it is necessary to wait for a period of time for the connection part to cool down fully. During the cooling process, the molten PPR material will gradually solidify, the molecular chains will rearrange and form a stable crystal structure. This solidification process enhances the strength of the connection and ensures the sealing of the connection. In the end, an integral structure will be formed between the PPR pipe and the PPR Pipe Union, which can withstand various stresses and pressures in the pipeline system.

The principle and good performance of the hot melt connection technology of the PPR Pipe Union play an important role in the pipeline system. Through the steps of heating, melting, fusion and cooling, this technology can achieve efficient and reliable connection between the PPR pipe and the PPR Pipe Union. This connection method has the characteristics of high strength and good sealing, and also has the advantages of convenient construction, environmental protection and energy saving.