US 12,133,571 B2
Shoe
Takashi Yamade, Kobe (JP)
Assigned to ASICS CORPORATION, Kobe (JP)
Appl. No. 17/255,973
Filed by ASICS CORPORATION, Kobe (JP)
PCT Filed Jun. 28, 2018, PCT No. PCT/JP2018/024556
§ 371(c)(1), (2) Date Dec. 23, 2020,
PCT Pub. No. WO2020/003433, PCT Pub. Date Jan. 2, 2020.
Prior Publication US 2021/0321714 A1, Oct. 21, 2021
Int. Cl. A43B 13/04 (2006.01); A43B 13/18 (2006.01); B32B 3/26 (2006.01); B32B 3/30 (2006.01); B32B 5/18 (2006.01); B32B 7/02 (2019.01); B32B 7/027 (2019.01); B32B 27/06 (2006.01); B32B 27/20 (2006.01); B32B 27/32 (2006.01)
CPC A43B 13/04 (2013.01) [A43B 13/187 (2013.01); B32B 3/266 (2013.01); B32B 3/30 (2013.01); B32B 5/18 (2013.01); B32B 7/02 (2013.01); B32B 7/027 (2019.01); B32B 27/065 (2013.01); B32B 27/20 (2013.01); B32B 27/32 (2013.01); B32B 2264/0221 (2013.01); B32B 2264/403 (2020.08); B32B 2437/02 (2013.01)] 7 Claims
OG exemplary drawing
 
1. A shoe comprising:
a midsole formed of a polymer foam; and
an outsole formed of a thermoplastic elastomer, wherein
the thermoplastic elastomer forming the outsole includes at least one selected from the group consisting of an olefin-based thermoplastic elastomer (TPO), an urethane-based thermoplastic elastomer (TPU), and a styrene-based thermoplastic elastomer (TPS), and further comprises a matrix and a plurality of domain particles dispersed in the matrix,
the plurality of domain particles comprise a crosslinked elastomer, and
the matrix comprises polypropylene,
the shoe comprises a shoe sole surface comprising a forefoot portion and a heel portion,
at least one of the forefoot portion and the heel portion comprises: a first area with the outsole exposed on the shoe sole surface; and a second area with the midsole exposed on the shoe sole surface,
a portion of the midsole constituting the second area has an apparent density that is higher than an apparent density of the entire midsole,
the second area has a ground-engaging portion formed of the midsole,
the first area and the second area are flush with each other when viewed as a cross section along the lengthwise direction of the shoe,
the outsole and the midsole are heat-fused to each other, and
the thermoplastic elastomer has a complex viscosity at 140° C. (η140) and a complex viscosity at 180° C. (η180) that satisfy both relational expressions (1) and (2) below:
10 kPa·s≤η140≤300 kPa·s  (1)
η180≤100 kPa·s  (2)