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The patent badge is an abbreviated version of the USPTO patent document. The patent badge does contain a link to the full patent document.

The patent badge is an abbreviated version of the USPTO patent document. The patent badge covers the following: Patent number, Date patent was issued, Date patent was filed, Title of the patent, Applicant, Inventor, Assignee, Attorney firm, Primary examiner, Assistant examiner, CPCs, and Abstract. The patent badge does contain a link to the full patent document (in Adobe Acrobat format, aka pdf). To download or print any patent click here.

Patent No.:

US 12359035 B1

PDFFull Text
Date of Patent:
Jul. 15, 2025

Filed:

Mar. 25, 2024

Manufacturing method of foam sheet for shoes with tpu powder and recycled pu scrap powder

Applicant:

Sam Bu Fine Chemical Co., Ltd., Gimhae-si, KR;

Inventor:

Heedae Park, Busan, KR;

Assignee:

SAM BU FINE CHEMICAL CO., LTD., Gimhae-si, KR;

Attorney:

Goldilocks Zone IP Law

Primary Examiner:

Michael A Tolin

Int. Cl.
CPC ...
A43B 17/14 (2006.01); A43B 17/00 (2006.01); A43B 23/02 (2006.01); B29C 44/34 (2006.01); B29C 44/56 (2006.01); B29C 51/14 (2006.01); B29C 65/48 (2006.01); B29D 35/14 (2010.01); B29K 75/00 (2006.01); B29K 105/26 (2006.01); B32B 5/02 (2006.01); B32B 5/18 (2006.01); B32B 5/24 (2006.01); B32B 37/12 (2006.01); C08J 9/00 (2006.01); B29K 105/00 (2006.01);
U.S. Cl.
CPC ...
C08J 9/0061 (2013.01); A43B 17/006 (2013.01); A43B 17/14 (2013.01); A43B 23/0215 (2013.01); A43B 23/0235 (2013.01); B29C 44/3442 (2013.01); B29C 44/5681 (2013.01); B29C 51/145 (2013.01); B29C 65/4805 (2013.01); B29C 65/4815 (2013.01); B29D 35/14 (2013.01); B29D 35/146 (2013.01); B32B 5/02 (2013.01); B32B 5/18 (2013.01); B32B 5/245 (2013.01); B32B 37/1207 (2013.01); B29C 2793/0027 (2013.01); B29K 2075/00 (2013.01); B29K 2105/251 (2013.01); B29K 2105/26 (2013.01); B32B 2037/1223 (2013.01); B32B 2262/0276 (2013.01); B32B 2262/0292 (2013.01); B32B 2266/0278 (2013.01); B32B 2272/00 (2013.01); B32B 2274/00 (2013.01); B32B 2437/02 (2013.01); C08J 2375/04 (2013.01); C08J 2475/04 (2013.01);
Abstract

The present invention relates to a manufacturing method for a foam sheet for shoes containing Thermoplastic polyurethane (TPU) powder and recycled Polyurethane (PU) scrap powder, and for an eco-friendly polyurethane foam composition including water foam, firstly the recycled PU scrap powder is mixed with polyol, and then the processing speed in a process is controlled through a side-feeder to react while adding the TPU powder and recycled PU scrap powder secondarily, thereby preventing a rise in viscosity of the raw material, so that even if a larger amount of recycled materials is used than before, it is possible to form foam sheets for shoes, such as shoe insoles or foam packages for shoe uppers, with the same level of product quality as conventional products.

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