Interleaving materials comprising particulate separator and acidic materials, for separating glass sheets
AssigneePilkington Brothers Limited
InventorsGordon Thomas Simpkin, Kenneth Ashcroft
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Abstract
An interleaving material for separating glass sheets and protecting them from scratching and staining during storage or transit comprises a porous finely divided support material, such as wood flour, impregnated with a weakly acidic material such as an organic acid (e.g. adipic acid) or an acid reacting salt, and fine particles of a chemically inert plastics material, e.g. a methyl methacrylate, preferably of slightly larger particle size than the acid-impregnated support material.
Claims25
An interleaving material for separating glass sheets and protecting them from staining, comprising a porous finely divided support material, impregnated with a weak organic acid selected from the group consisting of dibasic aliphatic acids, aromatic acids and mixtures thereof, and fine particles of a chemically inert plastics material selected from the group consisting of a thermoplastic homopolymer of an ethylenically unsaturated monomer, a thermoplastic copolymer of ethylenically unsaturated monomers and mixtures thereof, the particle size of said plastics material being larger than that of said acid-impregnated porous support material and the particle sizes of both said plastics material and said support material being such that the particles will pass through a 10 mesh British Standard sieve but will be retained on a 300 mesh British Standard sieve, said plastics material and said acid-impregnated porous support material being present in relative proportions between 90:10 and 10:90 parts by weight.
Dependencies are inferred from the claim text.