Table of Contents
- Introduction
- pvdc sheet production Process
- Technical Specifications of PVDC Sheets
- Anersin Company Solutions
- Conclusion
- References
Introduction
Polyvinylidene chloride (PVDC) is a synthetic thermoplastic polymer known for its excellent barrier properties against moisture, gases, and aromas. This makes it an ideal material for flexible packaging applications. This article delves into the meticulous production process of PVDC sheets, exploring the technical parameters and operational specifications involved.
PVDC Sheet Production Process
The production of PVDC sheets involves several precise steps that require stringent control parameters to achieve desired properties. The major stages include polymerization, compounding, extrusion, and finishing.
Polymerization
PVDC is produced through the polymerization of vinylidene chloride (VDC) monomers. This process typically operates at 60°C to 80°C with a pressure range of 10 to 15 atm. Catalysts such as peroxide initiators are used to propagate the polymer chain reaction efficiently. The resulting polymer has a molecular weight range of 25,000 to 50,000 g/mol.
Compounding
Post-polymerization, the PVDC is compounded with plasticizers, stabilizers, and processing aids to enhance its physical properties. The compounding process is performed at temperatures of 160°C to 180°C in high-shear mixers. This step ensures that the material gains appropriate flexibility and structural integrity.
Extrusion
The compounded PVDC material is then extruded into sheets using a flat-die extrusion process. The extrusion temperature ranges from 180°C to 200°C, and the sheet thickness can be controlled to range between 10 to 100 micrometers. Cooling rolls are employed to solidify and stabilize the sheet dimensions immediately after extrusion.
Finishing
Finally, PVDC sheets undergo surface treatments such as corona or flame treatment to enhance their adhesion properties. These processes modify the surface energy, facilitating better printability and lamination. Quality control measures, including thickness uniformity checks and barrier property tests, are also conducted to meet industry standards.
Technical Specifications of PVDC Sheets
- Barrier Properties: Oxygen transmission rate (OTR) is less than 1 cc/m²/24hr under 23°C and 0% RH.
- Moisture Vapor Transmission Rate (MVTR): Below 0.1 g/m²/24hr at 38°C and 90% RH.
- Tensile Strength: 50-70 MPa, with elongation rates of 100%-150%.
- Thermal Stability: Decomposition temperature surpasses 200°C.
Anersin Company Solutions
Anersin offers innovative solutions in the realm of PVDC sheet production. Their state-of-the-art compounding technologies enhance the thermal and mechanical stability of PVDC sheets. Anersin guarantees precision extrusion with minimized thickness variations, supported by their advanced quality control systems. They also provide customized surface treatment options to improve compatibility with a variety of printing inks and adhesives.
Conclusion
The production of PVDC sheets is a complex process requiring precise control of various parameters to achieve its renowned barrier properties. Companies like Anersin are at the forefront, leveraging advanced technologies to produce high-performance PVDC sheets tailored to specific applications in the packaging industry.
References
- Author, A. (Year). Title of the Source. Publisher.
- Author, B. (Year). Title of Another Source. Journal Name, Volume(Issue), pages.
- PVDC Properties and Applications. (n.d.). Retrieved from https://example.com/pvdc-properties.
- Technical Specifications of PVDC. (n.d.). Retrieved from https://example.com/technical-pvdc.
