| 摘要 |
1354895 Shot-blasting foams DUNLOP Ltd 14 Jan 1972 [2 Feb 1971] 3672/71 Heading C3R The surfaces of cellular plastics foams, particularly polyurethane foams derived from polyesters or polyethers, are subjected to shotblasting in order to perforate or remove cell membranes thereof. The preferred abrasive material is in the form of glass beads having a particle size in the range 70-200 microns. The treatment reduces the reflectance of the surfaces and, where membrane removal occurs, results in a reticulated foam. Uses.-The treated foams may be used as backings or interlayers for garment textiles. |
