How much do you know about sheet materials? — Report on the “Fundamentals of Sheet Materials” Training Course
Classification： Blog
Time：2019-01-15
One
To further deepen Jinbang employees’ understanding of sheet material knowledge, 2019 year 1 month 9 On [date], the head of the Technical Quality Department delivered a training session on “Basic Knowledge of Sheet Materials.”
In the class, the lecturer provided an in-depth explanation of polyvinyl chloride ( pvc ) The composition, processing principles, applications, and additives of sheet materials were discussed. In addition, common issues encountered in sheet production were illustrated, along with corresponding solutions, providing participants with substantial insights.
Speaker: Head of the Technical Quality Department
After the session, participants eagerly raised their questions, and the instructor used their professional expertise to address each concern. We are confident that, thanks to this training, everyone has gained a deeper understanding of sheet‑material knowledge.
Polyvinyl chloride, abbreviated as PVC in English, is a polymer formed through free-radical polymerization of vinyl chloride monomer (VCM) under the action of initiators such as peroxides or azo compounds, or in the presence of light and heat.
❖ PVC structure 
PVC is an amorphous white powder with a low degree of branching, a relative density of approximately 1.4, and a glass transition temperature of 77–90°C. It begins to decompose at around 170°C and exhibits poor stability to light and heat; above 100°C or upon prolonged exposure to sunlight, it degrades, releasing hydrogen chloride, which in turn accelerates further autocatalytic decomposition, leading to discoloration and a rapid decline in its physical and mechanical properties. In practical applications, stabilizers must be added to enhance its thermal and photostability.
Molecular weight of industrially produced PVC Typically ranging from 50,000 to 110,000 in molecular weight, it exhibits significant polydispersity, with molecular weight increasing as the polymerization temperature decreases. It has no distinct melting point: it begins to soften at 80–85°C, transitions to a viscoelastic state at 130°C, and enters the viscous flow regime at 160–180°C. It possesses good mechanical properties, with a tensile strength of approximately 60 MPa and an impact strength of 5–10 kJ/m², as well as excellent dielectric performance.PVC was once the world’s highest‑volume general‑purpose plastic, with extremely broad applications. It is widely used in construction materials, industrial products, everyday consumer goods, floor coverings, floor tiles, synthetic leather, pipes, wires and cables, packaging films, bottles, foamed materials, sealing materials, fibers, and many other areas.
Keywords： How much do you know about sheet materials? — Report on the “Fundamentals of Sheet Materials” Training Course
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