Abstract 1. A MOLDED PERFORATE ARTICLE COMPRISSING: (A9 A BASE LAYER FORMED OFF HIGH MOLECULARR WEIGHT POLYETHYLENE HAVING A LOW MELT FLOW INDEX; (B) A COVER LAYER FORMED OF VULCANIZED ELASTOMERIC MATERIAL; (C) THE MELTING TEMPERATURE OF THE POLYETHYLENE BEING LESS THAN THE VULCANIZING TEMPERATURE OF THE ELASTOMERIC MATERIAL AND THE MATERIALS BEING SUBJECTED DURING MOLDING TO A TEMPERATURE SUFFICIENT FOR VULCAANIZING THE SAID ELASTOMERIC MATERIAL SO THAT THE LATTER IS INTEGRALLY UNITED WITH SAID BASE LAYERS AT THE INTERFACE OF THE MATERIALS BY MUTUAL PENETRATION OF EACH INTO THE OTHER AT THE SAME INTERFACE WHILE BOTH MATERIALS WERE IN HOT PLASTIC CONDITION DURING THE MOLDING; (D) SAID BASE LAYER HAVING ITS THICKNESS IN THE RANGE OF 1/3 TO 1/2 OF THE OVERALL THICKNESS OF SAID ARTICLE; AND (E) THE PEFORATIONS OF SAID ARTICLES BEING TAPERED WITH THE LARGER DIMENSION OF EACH OPENING BEING AT THE OUTER SURFACE OF SAID BASE LAYER, LESS THAN 0.15 MEASURED IN ACCORDANCE WITH THE TEST PROCEDURES OF ASTM 1238-65T MODIFIED WITH A SUPLLEMENTARY LOAD OF 3 KG.
A MOLDED PERFORATE ARTICLE COMPRISSING: (A9 A BASE LAYER FORMED OFF HIGH MOLECULARR WEIGHT POLYETHYLENE HAVING A LOW MELT FLOW INDEX; (B) A COVER LAYER FORMED OF VULCANIZED ELASTOMERIC MATERIAL; (C) THE MELTING TEMPERATURE OF THE POLYETHYLENE BEING LESS THAN THE VULCANIZING TEMPERATURE OF THE ELASTOMERIC MATERIAL AND THE MATERIALS BEING SUBJECTED DURING MOLDING TO A TEMPERATURE SUFFICIENT FOR VULCAANIZING THE SAID ELASTOMERIC MATERIAL SO THAT THE LATTER IS INTEGRALLY UNITED WITH SAID BASE LAYERS AT THE INTERFACE OF THE MATERIALS BY MUTUAL PENETRATION OF EACH INTO THE OTHER AT THE SAME INTERFACE WHILE BOTH MATERIALS WERE IN HOT PLASTIC CONDITION DURING THE MOLDING; (D) SAID BASE LAYER HAVING ITS THICKNESS IN THE RANGE OF 1/3 TO 1/2 OF THE OVERALL THICKNESS OF SAID ARTICLE; AND (E) THE PEFORATIONS OF SAID ARTICLES BEING TAPERED WITH THE LARGER DIMENSION OF EACH OPENING BEING AT THE OUTER SURFACE OF SAID BASE LAYER, LESS THAN 0.15 MEASURED IN ACCORDANCE WITH THE TEST PROCEDURES OF ASTM 1238-65T MODIFIED WITH A SUPLLEMENTARY LOAD OF 3 KG.
Claim 2
Dependent Claim
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A MOLDED PERFORATE ARTICLE COMPRISSING: (A9 A BASE LAYER FORMED OFF HIGH MOLECULARR WEIGHT POLYETHYLENE HAVING A LOW MELT FLOW INDEX; (B) A COVER LAYER FORMED OF VULCANIZED ELASTOMERIC MATERIAL; (C) THE MELTING TEMPERATURE OF THE POLYETHYLENE BEING LESS THAN THE VULCANIZING TEMPERATURE OF THE ELASTOMERIC MATERIAL AND THE MATERIALS BEING SUBJECTED DURING MOLDING TO A TEMPERATURE SUFFICIENT FOR VULCAANIZING THE SAID ELASTOMERIC MATERIAL SO THAT THE LATTER IS INTEGRALLY UNITED WITH SAID BASE LAYERS AT THE INTERFACE OF THE MATERIALS BY MUTUAL PENETRATION OF EACH INTO THE OTHER AT THE SAME INTERFACE WHILE BOTH MATERIALS WERE IN HOT PLASTIC CONDITION DURING THE MOLDING; (D) SAID BASE LAYER HAVING ITS THICKNESS IN THE RANGE OF 1/3 TO 1/2 OF THE OVERALL THICKNESS OF SAID ARTICLE; AND (E) THE PEFORATIONS OF SAID ARTICLES BEING TAPERED WITH THE LARGER DIMENSION OF EACH OPENING BEING AT THE OUTER SURFACE OF SAID BASE LAYER, LESS THAN 0.15 MEASURED IN ACCORDANCE WITH THE TEST PROCEDURES OF ASTM 1238-65T MODIFIED WITH A SUPLLEMENTARY LOAD OF 3 KG.