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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 12036715 B1

PDFFull Text
Date of Patent:
Jul. 16, 2024

Filed:

Jan. 23, 2019

Thermoplastic resin sheet having hairlike bodies and molded product thereof

Applicant:

Denka Company Limited, Tokyo, JP;

Inventors:

Keishi Maeda, Isesaki, JP;

Junpei Fujiwara, Isesaki, JP;

Assignee:

DENKA COMPANY LIMITED, Tokyo, JP;

Attorney:

Oliff PLC

Primary Examiner:

Jeffrey M Wollschlager

Int. Cl.
CPC ...
B29C 48/12 (2019.01); B29C 48/08 (2019.01); B29C 48/13 (2019.01); B29C 59/02 (2006.01); B29K 21/00 (2006.01); B29K 23/00 (2006.01); B29K 75/00 (2006.01); B29K 101/12 (2006.01); B29L 31/00 (2006.01); B29L 31/30 (2006.01); B29L 31/34 (2006.01); B32B 3/26 (2006.01); B32B 3/30 (2006.01); B32B 27/08 (2006.01); B32B 27/32 (2006.01); B32B 27/40 (2006.01);
U.S. Cl.
CPC ...
B29C 48/12 (2019.02); B29C 48/08 (2019.02); B29C 48/13 (2019.02); B29C 59/02 (2013.01); B32B 3/26 (2013.01); B32B 3/30 (2013.01); B32B 27/08 (2013.01); B32B 27/32 (2013.01); B32B 27/40 (2013.01); B29K 2021/003 (2013.01); B29K 2023/00 (2013.01); B29K 2075/00 (2013.01); B29K 2101/12 (2013.01); B29L 2031/3005 (2013.01); B29L 2031/3481 (2013.01); B29L 2031/712 (2013.01); B32B 2439/40 (2013.01); B32B 2605/003 (2013.01);
Abstract

A resin sheet having hairlike bodies arranged regularly on at least one surface of an underlayer can be manufactured by forming the bodies by: melt extruding, from a die with an extrusion molding method, a thermoplastic resin having, on a log-log graph having elongational viscosity η(t) (unit: Pa·S) as measured at a strain rate of 0.5 (unit: S−1) and at a temperature at which elongation is possible as the vertical axis and elongation time t (unit: S) as the horizontal axis, a region in which the slope (log η/log t) in the interval 0.1<t<1.0 is no greater than 0.5 and by the temperature range wherein the adhesive force in probe tack measurement is 0.05-0.25 N/mm2 at least partially overlapping with the temperature at which elongation is possible; and casting using a transfer roll on which a relief process has been performed and a touch roll.

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