PTFE, PFA, FEP, PVDF Fluoroplastic products industry experts
How to solve the problem of PVDF heat shrink tube irradiation dose?
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Company Dynamics
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Release time:
2024-05-23
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Brief Introduction of 1. Irradiation Technology
Irradiation technology, in simple terms, is the use of high-energy rays (such as gamma rays, electron beams, etc.) to irradiate materials, in order to change the molecular structure of the material, so as to achieve the purpose of specific modification. In the production of PVDF heat shrinkable tube, irradiation is mainly used for crosslinking treatment, that is, the formation of a stable cross-link structure between PVDF molecules through radiation, which can not only enhance the physical properties of the material, such as improving temperature resistance and wear resistance, but also optimize its electrical properties to ensure that it can still maintain good insulation in harsh environments such as high temperature and high humidity.
2. what is the irradiation dose?
Radiation dose refers to the total amount of radiation energy absorbed per unit mass of material, commonly used in kGy (kiloGray). In the production of PVDF heat shrinkable tube, choosing the appropriate irradiation dose is the key, because the dose is too low may not be enough to achieve sufficient crosslinking, resulting in poor product performance; and the dose is too high may lead to excessive crosslinking or degradation of the material, affecting its flexibility, shrinkage performance and service life.
How do 3. determine the optimal dosage for PVDF heat shrink tubing?
Determining the optimal irradiation dose requires a combination of several factors:
Material characteristics: The molecular structure of PVDF, the type and content of additives will affect the efficiency of the crosslinking reaction.
Application requirements: Different use environments and performance requirements have different requirements for the degree of crosslinking. For example, heat shrinkable tubing used in high temperature environments requires a higher degree of crosslinking to improve temperature resistance.
Experimental verification: Through the laboratory test and pilot test, the performance test of PVDF heat shrinkable tube under different doses, including electrical properties, physical and mechanical properties, thermal shrinkage rate, etc., to find the optimal dose range.
Importance of 4. irradiation dose control
Ensure product quality: the precise control of the irradiation dose can ensure that the performance indicators of the heat shrinkable tube meet the design requirements and avoid product quality problems caused by improper dose.
Improve production efficiency: reasonable dose setting can reduce the time of testing and adjustment, speed up the production process, and improve the overall production efficiency.
Prolonged service life: The appropriate degree of crosslinking can significantly improve the anti-aging ability and long-term use stability of PVDF heat shrinkable tube, extend product life and reduce maintenance costs.
Environmental protection and safety: control the irradiation dose, avoid the degradation of materials caused by excessive irradiation, reduce the release of harmful substances, and meet the requirements of environmental protection.
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