PACKAGING MATERIAL, PACKAGING PAD AND MACHINE FOR MANUFACTURING PACKAGING MATERIAL

摘要

A packaging material comprises a base sheet (4; 148a, 148b) of unexpandable material such as paper and a second sheet (6 or 8; 112a, 112b or 112c) of expandable material such as paper, the second sheet having a number of rows of longitudinally spaced slits with the slits of one row offset from the slits of an adjacent row and being secured, in its expanded condition, to the base sheet. A packaging pad may comprise outer layers of unexpandable material with at least one layer of expanded material therebetween. The invention also provides a machine for use in manufacture of the material.