Interlayer and laminated product

Claim 2

A safety glass interlayer according to calim 1 wherein said copolymer in said core layer has between about 20 and about 60 weight percent aliphatic conjugated diolefin and between about 40 and about 80 weight percent alkenyl aromatic compound and wherein said copolymer in said load distribution layer has at least about 10 weight percent conjugated diolefin based upon the total weight of said copolymer in said load distribution layer.

Claim 3

A safety glass interlayer according to claim 1 wherein said copolymer in said load distribution layer is a block copolymer.

Claim 4

A safety glass interlayer in the form of a laminate comprising, in combination, a core layer of a normally solid, synthetic, organic polymer material having an ultimate tensile strength of at least about 1,000 psi, an ultimate elongation of at least about 25 percent, the ultimate tensile strength and the ultimate elongation as determined by ASTM Designation D638-68 at a rate of 5,000 inches per minute, and, when the ultimate tensile strength is between about 1,000 and about 3,500 psi, the polymer material of the core layer has an ultimate elongation in percent which is at least equal to the value obtained by the expression UE1000-3500 270 - (0.07)(ultimate tensile strength) and a load distribution layer on either side of and bonded to said core layer, said load distribution layer being fabricated of a normally solid, synthetic, organic polymer material having a minimum height to puncture of at least about 1 inch and a minimum height to tear of at least about 1 and 1/2 inches as determined by ASTM Designation D2582-67 using a 1/4 pound carriage and when the polymer material of said load distribution layer is torn by being subjected to the tear propagation procedure set forth in ASTM Designation D1938-67, the resulting edges of the tear are wavy and uneven.

Claim 5

A safety glass interlayer according to claim 5 wherein said core layer has a thickness of between abouT 4 and about 200 mils and each of said load distribution layers has a thickness of between about 0.5 and about 40 mils.

Claim 6

A laminated product comprising at least two layers of glass having an interlayer disposed therebetween and in mating relationship therewith, said interlayer comprising the combination of a core layer of a normally solid, synthetic, thermoplastic polymer material selected from the group consisting of an ionic copolymer of an Alpha -olefin having up to and including six carbon atoms per molecule and an Alpha , Beta -ethylenically unsaturated carboxylic acid selected from the group consisting of monocarboxylic acids and dicarboxylic acids each having up to and including eight carbon atoms per molecule, said ionic copolymer having at least about 10 percent of the carboxylic groups ionized by neutralization with a salt-forming cation; a copolymer of an aliphatic conjugated diolefin having between four and six carbon atoms per molecule and an alkenyl aromatic compound having up to and including 12 carbon atoms per molecule; alkyl ethers of cellulose wherein each alkyl group of said ether contains up to and including seven carbon atoms per molecule; organic acid esters of cellulose wherein each organic acid group of said ester contains up to and including seven carbon atoms per molecule; polyurethane; nylon; polycarbonate; and plasticized poly(vinyl chloride); said core layer having an ultimate tensile strength of at least about 1,000 psi, an ultimate elongation of at least about 25 percent, the ultimate tensile strength and the ultimate elongation as determined by ASTM Designation D638-68 at a rate of 5,000 inches per minute, and, when the ultimate tensile strength is between about 1,000 and about 3,500 psi, said core layer has an ultimate elongation in percent which is at least equal to the value obtained by by the expression UE1000-3500 270 - (0.07)(ultimate tensile strength); and a load distribution layer on either side of and bonded to said core layer, said load distribution layer being fabricated of a normally solid, synthetic, thermoplastic polymer material selected from the group consisting of an ethylene polymer, a polymer of an aliphatic conjugated diolefin having between four and six carbon atoms per molecule, and a copolymer of an aliphatic conjugated diolefin having between four and six carbon atoms per molecule and an alkenyl aromatic compound having up to and including 12 carbon atoms per molecule, said load distribution layer having a minimum height to puncture of at least about 1 inch and a minimum height to tear of at least about 1 and 1/2 inches as determined by ASTM Designation D2582-67 using a one-quarter pound carriage and when said load distribution layer is torn by being subjected to the tear propagation procedure set forth in ASTM Designation D1938-67, the resulting edges of the tear are wavy and uneven.

Claim 7

A laminated product according to claim 7 wherein said core layer has a thickness of between about 4 and about 200 mils and each of said load distribution layers has a thickness of between about 0.5 and about 40 mils.

Claim 8

A laminated product according to claim 7 wherein said copolymer in said core layer has between about 20 and about 60 weight percent aliphatic conjugated diolefin and between about 40 and about 80 weight percent alkenyl aromatic compound and wherein said copolymer in said load distribution layer has at least about 10 weight percent conjugated diolefin based upon the total weight of said copolymer in said load distribution layer.

Claim 9

A laminated product according to claim 7 wherein said copolymer in said load distribution layer is a block copolymer.

Claim 10

A laminated product comprising at least two layers of glass having an interlayer disposed therebetween and in mating relationship Therewith, said interlayer comprising the combination of a core layer of a normally solid, synthetic, organic polymer material having an ultimate tensile strength of at least about 1,000 psi, an ultimate elongation of at least about 25 percent, the ultimate tensile strength and the ultimate elongation as determined by ASTM Designation D638-68 at a rate of 5,000 inches per minute, and, when the ultimate tensile strength is between about 1,000 and about 3,500 psi, the polymer material of the core layer has an ultimate elongation in percent which is at least equal to the value obtained by the expression UE1000-3500 270 - (0.07)(ultimate tensile strength) and a load distribution layer on either side of and bonded to said core layer, said load distribution layer being fabricated of a normally solid, synthetic, organic polymer material having a minimum height to puncture of at least about 1 inch and a minimum height to tear of at least about 1 and 1/2 inches as determined by ASTM Designation D2582-67 using a 1/4 pound carriage and when the polymer material of said load distribution layer is torn by being subjected to the tear propagation procedure set forth in ASTM Designation D1938-67, the resulting edges of the tear are wavy and uneven.

Claim 11

A laminated product according to claim 11 wherein said core has a thickness of between about 4 and about 200 mils and each of said load distribution layers has a thickness of between about 0.5 and about 40 mils.