In the PVC foam board, joined ultrahigh molecular weight polymer purposes: one is to promote the fusion of PVC; two is to improve the PVC foaming material melt strength, prevent bubbles combine, to obtain a homogeneous foam products; three is to ensure the melt and has good mobility, in order to get good appearance products. Due to the different foam products manufacturers of products, the use of equipment, technology, raw materials and the lubricating system are different, therefore we have developed with the different properties of the foaming agent, to meet the different needs of users.
The 1 foamed material definition
The foaming plastic is also called foam, is taking plastic as basic composition, containing a large number of bubbles, can saying is to gas filled composites.
The 2 foamed material classification
According to the foaming ratio of different, can be divided into high and low foaming of foaming, foam quality according to the degree of soft, can be divided into rigid, semi-rigid, flexible foam. According to the pore structure can be divided into closed-cell foam and open-cell foam. The common PVC foam sheet of rigid obturator low foamed sheet.
The application of 3.PVC foam sheet
PVC foam sheet has chemical corrosion resistance, weather resistance, flame resistance and other advantages, widely applied in many aspects, including the display panel, mark, billboards, partition, building board, furniture board.
4 key factors in quality evaluation of foaming sheet
The foam, bubble size and uniformity is the key factor influencing sheet quality. In times of low foamed sheet, bubble hole is small and uniform foaming sheet material, good toughness, high strength, good surface quality. From the lower foam sheet density into consideration, only the bubble of small and uniform to further reduce the possibility of foam density, large and scattered difficult to further reduce the density.