| 摘要 |
<p>1,241,921. Reinforced laminate. J. P. BEMBERG A.G. 3 Jan., 1969 [3 Jan., 1968], No. 531/69. Heading B5N. A laminate 7 comprises a reinforcing lattice of drawn foil tapes 3, 4 laid one on top of another and two cover layers 1, 2 which are joined together adhesively. The foil tapes 3, 4 which preferably have an elongation of 12-45% at rupture, are suitably stretched to an elongation of at least 2%. The transverse and longitudinal tapes may have different elastic properties and be stretched to differing degrees. The tapes 3, 4, which may be thermoset after drawing, are laid on top of each other so that the spacings 5, 6 are at least 1À5 times the tape width. The tapes are 1-6 mm. wide and 5-100 mÁ thick. The cover layers 1, 2 are undrawn but may be biaxially stretched. The cover layers and the tape may be of the same material but are preferably different. Suitable cover layer are made from polypropylene, polyethylene, PVC, polyesters and polyamides. The tapes can be made of polyethylene, polypropylene having an atatic content greater than 5%, or a polyolefin copolymer containing 5-25% wt. polyethylene. The laminate 7 may be heat shrinkable.</p> |
