FOOTWEAR SOLE, BOOT AND SANDAL
Aspects of the invention can be directed to a shoe including an outsole portion; an upper portion connected to the outsole portion; and an insole core portion disposed within the outsole portion. The insole core portion can include a single compound including: styrene ethylene butylene styrene block copolymer (SEBS), ethyl vinyl acetate copolymer (EVA) in the range of 17% to 27% by weight; and polyolefin elastomer (POE) in the range of 6% to 16% by weight. The single compound can additionally include a rubber which is a styrenic block copolymer (SBC) consisting of polystyrene blocks and rubber blocks. The insole core portion can also have a dry skid resistance in the range of u 0.30 to u 0.80, and wet skid resistance in the range of u 0.35 to u 0.60, determined according to F2913-2011, as well as other characteristics.
1 . A shoe, comprising:
an outsole portion;
an upper portion connected to the outsole portion; and
an insole core portion disposed within the outsole portion,
wherein the insole core portion is composed of a single compound including:
styrene ethylene butylene styrene block copolymer (SEGS),
ethyl vinyl acetate copolymer (EVA) in the range of 17% to 27% by weight; and
polyolefin elastomer (POE) in the range of 6% to 16% by weight,
and wherein the single compound additionally comprises a rubber which is a styrenic block copolymer (SBC) consisting of polystyrene blocks and rubber blocks, and
wherein the insole core portion has at least one of the following:
(i) a dry skid resistance in the range of u 0.30 to u 0.80, and wet skid resistance in the range of u 0.35 to u 0.60, determined according to F2913-2011,
(ii) a Shore A hardness in the range of 20H to 35H and a Shore C hardness in the range of 35H to 48H, determined according to ASTM D2240,
(iii) a compression set of not more than 30%, determined according to SATRA TM156:2002,620n,
(iv) a density in the range of 0.2 to 0.7 mg per cubic meter (mg/m 3 ), determined according to ASTM D297, and
(v) an abrasion resistance in the range of about 0.1 to about 0.5 g after 10,000 cycles, determined according to ASTM D3886-99.
2 . The shoe of claim 1 , wherein the single compound includes:
EVA in the range of 20% to 24% by weight; and
POE in the range of 9% to 13% by weight.
3 . The shoe of claim 2 , wherein the single compound includes:
EVA 22% by weight; and
POE 11% by weight.
4 . The shoe of claim 1 , wherein the single compound further includes:
a bridging agent in the range of 0% to 2 by weight %.
4 . The shoe of claim 4 , wherein the single compound further includes a foaming agent in the range of 0% to 4% by weight.
6 . The shoe of claim 1 , wherein the insole core portion is formed by a single shot injection molding process.
7 . The shoe of claim 1 , wherein the insole core portion is formed by a two step compression molding process.
8 . The shoe of claim 1 , wherein the outsole portion formed from a durable synthetic rubber.
9 . The shoe of claim 1 , wherein the upper portion is formed from at least one of the group including leather, nylon and canvas.
10 . The shoe of claim 1 ,
wherein the insole core portion includes:
an insole peripheral wall extending upward from a peripheral edge of a top surface of the insole core portion; and
a cushioning insole arch portion, and
the insole core portion is shaped to provide a comfortable fit for a user's foot that is placed on the cushioning insole arch portion and within the peripheral wall.
11 . The shoe of claim 1 , wherein the upper portion is connected to the outsole portion via gluing.