| 摘要 |
PURPOSE:To enable continuous production of a polyolefinic foam of good quality in a continuous length without adding a crosslinking agent such as an organic peroxide. CONSTITUTION:To 100 pts.wt. polyolefinic resin, are added 0.5-50 pts.wt anhydrous high-purity silica having 7-50nm average particle size and 50-380m<2>/g surface area and 5-30 pts.wt. chemucal foaming agent. The resultant mixture is then heated and expanded. |
