公开(公告)号：WO1993015888A1

公开(公告)日：1993-08-19

申请号：PCT/US1993000915

申请日：1993-02-02

Applicant: WEYERHAEUSER COMPANY

Inventor： WEYERHAEUSER COMPANY ,  WINTEROWD, Jack, G. ,  PARK, David, W. ,  WIRZ, Harry, J. ,  KREIBICH, Roland, E. ,  SHANTZ, Robert, M. ,  GHERMAY, Timnit ,  CHILDRESS, Charles, C.

IPC: B27N07/00

CPC classification number: B27N7/005 ,  E04C2/10 ,  Y10T428/249959 ,  Y10T428/249987 ,  Y10T428/249989 ,  Y10T428/31989

Abstract: A method of producing a surfaced composite panel (30) of cellulosic particulates, such as wood flakes, involves the application of polymer forming foamable material (36) to at least one of the first (32) and second (34) major surfaces of the panel, contacting said at least one of the first and second surfaces with a pressure applying surface to apply pressure thereto, foaming the polymer forming foamable material while pressure is applied and curing the applied foam material to produce a polymeric coating on the panel with the desired surface, which is typically extremely smooth. One or both surfaces may be surface treated in this manner. A skin (48) formed on the surface of the panel is believed to add to the strength and stiffness of the coating on the panel. A wide variety of foaming systems may be used to accomplish this surface treating. By avoiding sanding the surface treated panel, the skin remains intact. The resulting panel, in addition to being extremely smooth as desired, resists water penetration when subjected to water or high humidity conditions. The resulting panel is receptive to adhesives for purposes of securing overlaying materials such as vinyl, reduces formaldehyde emissions when a panel formed of the resin which emits formaldehydes is surface treated.

Abstract translation: 生产纤维素颗粒如木屑的表面复合板（30）的方法涉及将聚合物形成发泡材料（36）施加到第一（32）和第二（34）主表面中的至少一个 使所述第一和第二表面中的至少一个与压力施加表面接触以对其施加压力，在施加压力的同时使聚合物形成发泡材料，并固化所施加的泡沫材料，以在所述面板上产生具有期望的聚合物涂层 表面，通常非常光滑。 一个或两个表面可以以这种方式进行表面处理。 认为形成在面板表面上的皮肤（48）增加了面板上涂层的强度和刚度。 可以使用各种发泡系统来完成该表面处理。 通过避免打磨表面处理的面板，皮肤保持原样。 除了根据需要非常光滑之外，所得到的面板在经受水或高湿度条件时抗水渗透。 所得到的面板接受粘合剂，以便确保覆盖材料例如乙烯基，当由发出甲醛的树脂形成的面板进行表面处理时，减少甲醛释放。