Shoe Sole Component

• US 20080229622A1
• Filed: 05/10/2006
• Published: 09/25/2008
• Est. Priority Date: 05/10/2005
• Status: Active Grant

• Current Assignee: ASICS Corporation
• Original Assignee: ASICS Corporation
• Inventors: Morikawa, Akiyuki, Mori, Sadaki, Imazato, Katsuhiro, Harano, Kenichi
• Granted Patent: US 8,008,363 B2
• Time in Patent Office: Days
• US Class Current: 36/25R
• CPC Class Codes: A43B 13/04 Plastics, rubber or vulcanised fibre
• CPC Class Codes: A43B 13/187 Resiliency achieved by the features of the material, e.g. foam, non liquid materials
• CPC Class Codes: C08L 2205/02 containing two or more polymers of the same C08L -group
• CPC Class Codes: C08L 23/02 not modified by chemical after-treatment
• CPC Class Codes: C08L 2666/06 Homopolymers or copolymers of unsaturated hydrocarbons; Derivatives thereof
• CPC Class Codes: C08L 2666/18 Polyesters or polycarbonates according to C08L67/00 - C08L69/00; Derivatives thereof
• CPC Class Codes: C08L 2666/20 Macromolecular compounds having nitrogen in the main chain according to C08L75/00 - C08L79/00; Derivatives thereof

Abstract

There is provided a shoe sole component that has properties such as strength and cushioning property that are suppressed from being changed even under a wide temperature range from severe cold at −10° C. or lower to high temperature conditions exceeding 30° C. A shoe sole component includes a cross-linked foam of a resin composition, the resin composition containing a thermoplastic polyolefin resin, in which tan δ [−20° C. to 40° C.] at a frequency of 10 Hz measured according to JIS K 7244-4 is 0.01 to 0.5, and tan δ [−20° C.]/tan δ [40° C.] at a frequency of 10 Hz is 0.7 to 1.3.

Claims

1. A shoe sole component that is characterized by that it comprises a cross-linked foam of a resin composition, the resin composition containing a thermoplastic polyolefin resin, wherein tan δ

[−

20°

C. to 40°

C.] at a frequency of 10 Hz measured according to JIS K 7244-4 is 0.01 to 0.5, and tan δ

[−

20°

C.]/tan δ

[40°

C.] at a frequency of 10 Hz is 0.7 to 1.3.

2. The shoe sole component according to claim 1, wherein the resin composition containing the thermoplastic polyolefin resin contains at least two different resin components, including a first resin component having a property that:

tan δ

[−

20°

C.]/tan δ

[40°

C.] at a frequency of 10 Hz measured according to JIS K 7244-4 is 0.5 to 1.5, a specific gravity measured according to JIS K 7311 is 0.85 to 0.95, a storage elastic modulus E′

[20°

C.] at 20°

C. and at a frequency of 10 Hz measured according to JIS K 7244-4 is 100 to less than 500 MPa, and a loss elastic modulus measured according to JIS K 7244-4 is not more than 40 MPa, and a second resin component having any one of properties including;

a property that a storage elastic modulus E′

[20°

C.] at 20°

C. and at a frequency of 10 Hz measured according to JIS K 7244-4 is 10 to less than 100 MPa and a loss elastic modulus measured according to JIS K 7244-4 is not more than 10 MPa; and

a property that a storage elastic modulus E′

[20°

C.] at 20°

C. and at a frequency of 10 Hz measured according to JIS K 7244-4 is 500 to 2000 MPa and a loss elastic modulus measured according to JIS K 7244-4 is not more than 50 MPa.

3. The shoe sole component according to claim 2, wherein the first resin component is a thermoplastic polyolefin resin.

4. The shoe sole component according to claim 2, wherein the second resin component is at least one selected from the group consisting of a thermoplastic polyolefin resin, a styrene resin, an urethane resin and a polyester resin.

5. The shoe sole component according to any one of claims 1 to 4, wherein a storage elastic modulus E′

[−

20°

C. to 40°

C.] at −

20 to 40°

C. and at a frequency of 10 Hz measured according to JIS K 7244-4 is 2 to 50 MPa, and a value of E′

[−

20°

C.]/E′

[40°

C.] in a storage elastic modulus E′

[−

20°

C.] at −

20°

C. and a storage elastic modulus E′

[40°

C.] at 40°

C. is 2 to 20.

6. The shoe sole component according to any one of claims 1 to 5, wherein a main transition peak temperature measured by differential scanning calorimetry (DSC) according to JIS K 7121 is 90 to 105°

C., and the heat of transition measured by differential scanning calorimetry (DSC) according to JIS K 7122 is 60 to 100 J/g.

7. The shoe sole component according to any one of claims 1 to 6, wherein a specific gravity measured according to JIS K 7311 is 0.05 to 0.2.

8. The shoe sole component according to any one of claims 1 to 7, wherein a compression set value measured according to ASTM D395 for 22 hours at 20±

3°

C. is not more than 65%.

9. The shoe sole component according to any one of claims 1 to 8, wherein a C hardness at 20°

C. measured according to Japan Rubber Association Standard SRIS0101 is 35 to 70.

10. The shoe sole component according to any one of claims 1 to 9, wherein a tearing strength measured according to JIS K 6252 is not less than 8.8 kN/m.

11. The shoe sole component according to any one of claims 1 to 10, wherein a rebound resilience measured according to JIS K 6255 is not less than 40%.

12. The shoe sole component according to any one of claims 1 to 11, containing 60 to 95 parts by weight of the thermoplastic polyolefin resin in 100 parts by weight of a resin of the resin composition.