Method of producing sliding material for weather strips

Patent metadata

Field	Value
Publication number	US-10047201-B2
Application number	US-201515305456-A
Country	US
Kind code	B2
Filing date	Aug 28, 2015
Priority date	Sep 30, 2014
Publication date	Aug 14, 2018
Grant date	Aug 14, 2018

Abstract

PP, an EPDM prior to crosslinking, and PE particles are fed into a twin screw extruder and melt-kneaded so that the EPDM is dynamically crosslinked, whereby a sliding material for weather strips formed of an olefin-based TPV in which the PE particles are dispersed is produced. The amount of the PE particles blended is 10 parts by mass to 90 parts by mass with respect to 100 parts by mass of the total amount of the PP and the EPDM. It is preferable that the PE particles have an average particle diameter of 30 μm to 200 μm before the feeding, and are micronized by the melt kneading to have an average particle diameter of 10 μm to 50 μm in the produced sliding material for weather strips.

First claim

The invention claimed is:

1. A method of producing a sliding material for weather strips, the sliding material formed of an olefin-based TPV in which PE particles are dispersed, the method comprising:
feeding PP, an EPDM prior to crosslinking, and PE particles into a twin screw extruder, and
melt-kneading the PP, the EPDM, and the PE particles to dynamically crosslink the EPDM,
wherein the PE particles have an average particle diameter of 30 μm to 200 μm before the feeding, and are micronized by the melt-kneading to have an average particle diameter of 10 μm to 50 μm in a produced sliding material for weather strips.

2. The method of producing a sliding material for weather strips according to claim 1 , wherein the PE particles are blended in an amount of 10 parts by mass to 90 parts by mass with respect to 100 parts by mass of the total amount of the PP and the EPDM.

3. The method of producing a sliding material for weather strips according to claim 1 wherein a material for the PE particles is an ultra-high molecular weight PE.

4. The method of producing a sliding material for weather strips according to claim 1 , wherein, in the sliding material for weather strips, 30 parts by mass or less of a silicone compound is additionally blended with respect to 100 parts by mass of the total amount of the PP and the EPDM.

5. The method of producing a sliding material for weather strips according to claim 1 ,
wherein, in the sliding material for weather strips, 30 parts by mass or less of a silicone compound is additionally blended with respect to 100 parts by mass of the total amount of the PP and the EPDM, and
wherein the silicone compound is fed into the twin screw extruder and kneaded together with the PP, the EPDM prior to crosslinking, and the PE particles.

6. The method of producing a sliding material for weather strips according to claim 1 , wherein, in the sliding material for weather strips, 30 parts by mass or less of a silicone compound is additionally blended with respect to 100 parts by mass of the total amount of the PP and the EPDM, and
wherein the olefin-based TPV in which PE particles are dispersed obtained using the twin screw extruder and the silicone compound are newly fed into a twin screw extruder and melt-kneaded.

7. A method of producing a sliding material for weather strips, the sliding material formed of an olefin-based TPV in which PE particles are dispersed, the method comprising:
feeding PP, an EPDM prior to crosslinking, and PE particles into a twin screw extruder, and
melt-kneading the PP, the EPDM, and the PE particles to dynamically crosslink the EPDM,
wherein the PE particles are blended in an amount of 10 parts by mass to 90 parts by mass with respect to 100 parts by mass of the total amount of the PP and the EPDM, and
wherein a material for the PE particles is an ultra-high molecular weight PE.

8. The method of producing a sliding material for weather strips according to claim 7 wherein the PE particles have an average particle diameter of 30 μm to 200 μm before the feeding, and are micronized by the melt-kneading to have an average particle diameter of 10 μm to 50 μm in a produced sliding material for weather strips.

9. The method of producing a sliding material for weather strips according to claim 7 , wherein, in the sliding material for weather strips, 30 parts by mass or less of a silicone compound is additionally blended with respect to 100 parts by mass of the total amount of the PP and the EPDM.

10. The method of producing a sliding material for weather strips according to claim 7 ,
wherein, in the sliding material for weather strips, 30 parts by mass or less of a silicone compound is additionally blended with respect to 100 parts by mass of the total amount of the PP and the EPDM, and
wherein the silicone compound is fed into the twin screw extruder and kneaded together with the PP, the EPDM prior to crosslinking, and the PE particles.

11. The method of producing a sliding material for weather strips according to claim 7 ,
wherein, in the sliding material for weather strips, 30 parts by mass or less of a silicone compound is additionally blended with respect to 100 parts by mass of the total amount of the PP and the EPDM, and
wherein the olefin-based TPV in which PE particles are dispersed obtained using the twin screw extruder and the silicone compound are newly fed into a twin screw extruder and melt-kneaded.

12. A method of producing a sliding material for weather strips, the sliding material formed of an olefin-based TPV in which PE particles are dispersed, the method comprising:
feeding PP, an EPDM prior to crosslinking, and PE particles into a twin screw extruder, and
melt-kneading the PP, the EPDM, and the PE particles to dynamically crosslink the EPDM,
wherein the PE particles are blended in an amount of 10 parts by mass to 90 parts by mass with respect to 100 parts by mass of the total amount of the PP and the EPDM, and
wherein, in the sliding material for weather strips, 30 parts by mass or less of a silicone compound is additionally blended with respect to 100 parts by mass of the total amount of the PP and the EPDM.

13. The method of producing a sliding material for weather strips according to claim 12 wherein the PE particles have an average particle diameter of 30 μm to 200 μm before the feeding, and are micronized by the melt-kneading to have an average particle diameter of 10 μm to 50 μm in a produced sliding material for weather strips.

14. The method of producing a sliding material for weather strips according to claim 12 wherein the silicone compound is fed into the twin screw extruder and kneaded together with the PP, the EPDM prior to crosslinking, and the PE particles.

15. The method of producing a sliding material for weather strips according to claim 12 wherein the olefin-based TPV in which PE particles are dispersed obtained using the twin screw extruder and the silicone compound are newly fed into a twin screw extruder and melt-kneaded.

Assignees

• Toyoda Gosei Kk

Inventors

• Hirose Atsuko
• Yamaguchi Yasuhiro
• Kurimoto Hidekazu

Classifications

• C08J3/24 Primary

  Crosslinking, e.g. vulcanising, of macromolecules (mechanical aspects B29C35/00; crosslinking agents C08K) · CPC title

• C08L2312/00

  Crosslinking · CPC title

• C08J2323/06

  Polyethene · CPC title

• C08L83/04

  Polysiloxanes · CPC title

• C08L2205/03

  containing three or more polymers in a blend · CPC title