The pvc furniture board is also known as Chevron board and Andy board, its chemical composition is polyvinyl chloride. PVC foam board is widely used in buses, train cars ceiling, box core, interior panels, building wall panels, decorative panels, office, residential, public building, commercial decorative frame, clean room, ceiling panels, screen printing, computer lettering, advertising, labeling, display panels, signs and so on.
1. Waterproof, fire retardant, acid resistant, moth resistant, light, heat insulation, noise insulation, shock absorption
2. Processed under the same conditions, its processing performance is far superior to wood
3. Ideal substitute of wood, aluminum, composite sheet
4. Crust plate surface is very smooth, high hardness, not easy to scratch, commonly used in the production of cabinets, furniture, etc.
Definition of foamed material
Foam plastic is also known as foam plastic, using plastic as the basic component and contains a large amount of bubbles, which can be regarded as the composite material using gas as fillings.
Classification of foam sheet
Depending on the expansion ratio, it can be divided into high foam and low foam; according to the hardness of bubble constitution, PVC celuka foam board can be divided into rigid, semi-rigid and soft foam. According to the cell structure, it can be divided into closed cell foam and open cell foam. Generally common PVC foam sheet is rigid closed cell low foam sheet.
Application of PVC foam sheet
PVC foam sheet has chemical resistance, weather resistance, flame resistance and other advantages, which is widely used in a number of areas, including display panels, tags, billboards, partitions, building panels, sheet for furniture, etc.
Key factor evaluating the quality of the foamed sheet
For foamed materials, cell size and uniformity are the key factors affecting the quality of the sheet. Low foam sheet has small and uniform cell, good foam sheet toughness, high strength and good surface quality. Considering from the lower density foam sheet, only small and uniform cell has the possibility of further reducing density, large and bulk foam is difficult to further reduce the density.
Key points to control PVC foaming process
Plastic foam molding is divided into three processes: bubble nucleus formation, bubble nucleus expansion and foam body curing. For foamed PVC sheet added with chemical vesicant, the expansion of bubble nucleus has a decisive influence on the quality of the foamed sheet. PVC is straight-chain molecules, the molecular chain is short, the melt strength is low, during the process of bubbles expanding into the bubble, the melt is not sufficient to cover the bubbles, the gas is easily to overflow and merge into large bubbles, reducing the quality of the foamed sheet product.
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