Knowledge of PVC Foam Board

What is PVC Foam Board?

The PVC foam board is also known as Chevron board and Andy board, its chemical composition is polyvinyl chloride. PVC foam boards are widely used in buses, train cars ceiling box core layer, interior panels, the external walls of the building board, decoration board, office, residential and public building, commercial decorative frame, clean room with a plate, ceiling panels, screen printing, computer lettering, advertising label, display panels, signs with the board albums boards and other industries and chemical anti-corrosion engineering, thermoforming parts, cold storage with a board, special cold project environmental formwork, sports equipment, farming with material waterfront facilities, moisture, water-resistant materials, art materials and a variety of portable partition instead of the glass ceiling, etc.

PVC Foam Board Features and Performance

Pvc foam board has the performance of sound insulation, sound absorption and insulation; the PVC foam sheet quality is flame retardant, and it can be self-extinguishing eventuality of fire, it is safe to use; PVC foam board products are moisture-proof, anti- mildew, non-absorbent performance, and shock effect; colors of PVC foam board products can keep the bright colors after being weather resistance formulated over the long term, not aging; PVC foam board is light in texture, easy to store and transport, convenient construction; PVC the foam board general wood processing tools to construction; PVC foam board is the same as wood drilling, sawing, nailing, planning, sticky processing; PVC is applicable to thermoforming PVC foam board, heat bending and folding process; foam board can be welded or bonded with other PVC materials; PVC foam board has smooth surface and easy for printing.

Key Points of PVC Foam Board Process

The foam pvc mouldings are divided into three processes: the formation of the bubble nucleus, the expansion of the cell nuclei, and the curing of the foam. For PVC foam sheet, adding a chemical foaming agent, the expansion of the bubble nucleus has a decisive influence on the quality of the expanded sheet. PVC is a straight-chain molecules, the molecular chain is short, low melt strength in the process of cell nuclei inflated into a bubble, the melt is insufficient to coat the bubbles, the gas easily overflow into large bubbles, and to reduce the foam sheet of product quality . The key factor in improving the quality of PVC foam sheet is to improve the melt strength of the PVC. From the processing characteristics of polymer materials, PVC melt strength in a variety of ways, but the most effective way is added to improve the melt strength additives and lower processing temperatures. PVC belongs to amorphous materials, the melt strength decreases with the increasing of melt temperature, and on the contrary, melt strength increases with the reduce of melt temperature, the cooling effect is limited and it only plays a supporting role.

This article is come from:http://www.chinawoodenflooring.com/index.php/knowledge-of-pvc-foam-board.htm