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公开(公告)号：US10774892B2
公开(公告)日：2020-09-15
申请号：US16327088
申请日：2017-08-22
申请人： TEIJIN ARAMID B.V.
IPC分类号： F16D69/02 , D21H13/26 , D21H17/68 , D21H17/34 , D21H17/48 , D21H23/04 , D21H21/18 , D21H27/00 , F16D13/52
摘要： A friction paper including filler, para-aramid pulp, and resin, characterised in that the para-aramid pulp includes 0.1 to 10 wt. % of polyvinyl pyrrolidone (PVP), the paper having a grammage in the range of 100 to 800 g/m2. It has been found that the use of a PVP-containing para-aramid pulp leads to improved friction performance as compared to the use of para-aramid pulp not containing PVP. Effects obtained include improved friction properties, improved strength properties, and improved filler retention.
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公开(公告)号：US11542660B2
公开(公告)日：2023-01-03
申请号：US16325597
申请日：2017-08-22
申请人： TEIJIN ARAMID B.V.
摘要： A process for manufacturing an aramid pulp including polyvinyl pyrrolidone (PVP), the method including the steps of: combining para-aramid short-cut with PVP in an aqueous solution to form a mixture, subjecting the mixture to a refining step to form a para-aramid pulp including PVP. It has been found that the process makes it possible to obtain a PVP pulp with improved dewatering properties and energy consumption in combination with a high PVP retention.
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公开(公告)号：US09922750B2
公开(公告)日：2018-03-20
申请号：US14647286
申请日：2013-11-14
申请人： TEIJIN ARAMID B.V.
发明人： Ben Rolink , Richard Visser , Frank Diedering
摘要： An electrical insulating paper having 40-80 wt % of aramid fibrid, 10-50 wt % of aramid pulp, and 10-50 wt % of aramid short-cut. The aramid pulp is para-aramid pulp with a length of 0.5-6 mm and has a Schopper Riegler value of 15-85; the aramid fibrid is para-aramid fibrid; and the aramid short-cut is para-aramid short-cut. The paper shows a high dielectric strength and tensile index. A method for manufacturing the paper and an insulated conductor that includes the paper.
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公开(公告)号：US11111632B2
公开(公告)日：2021-09-07
申请号：US16464534
申请日：2017-11-27
申请人： TEIJIN ARAMID B.V.
摘要： An aramid paper suitable for use in electronic applications which has a density of 0.20-0.65 g/cm3 and a grammage of 30-280 g/m2, which paper comprises 10-40 wt. % of aramid shortcut with a linear density of 2.6 dtex or lower and a length of 0.5-25 mm and 10-90 wt. % of aramid fibrid, wherein the aramid shortcut comprises at least 70 wt. % para-aramid shortcut and the aramid fibrid including at least 70 wt. % para-aramid fibrid. It has been found that the use of a paper with the above properties in electronic applications ensures a low CTE in combination with good homogeneity and a good dimensional stability resulting from good resin adhesion and penetration. Use of the aramid paper in a composite sheet including at least one layer of aramid paper and a resin, or in a substrate board for electronic applications.
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公开(公告)号：US10003057B2
公开(公告)日：2018-06-19
申请号：US14917112
申请日：2014-08-28
申请人： TEIJIN ARAMID B.V.
发明人： Fresia Alvarado Chacon , Ramon Van Rooij , Richard Visser , Jan David Tiecken , Frank Diedering
CPC分类号： H01M2/162 , D21H13/26 , H01B3/52 , H01M2/145 , H01M10/0525
摘要： A paper suitable for use as separator in an electrochemical cell, including at least 60 wt. % of an aramid fibril and at least 1 wt. % of an aramid fiber. The paper has a grammage of 5 to 100 g/m2, and the aramid fibril has a Canadian Standard Freeness (CSF) in a wet phase of less than 300 ml and a specific surface area (SSA) after drying of less than 3 m2/g. It has been found that a paper with this composition combines good electrolyte absorption and ion permeability with high stability during use, leading to a long lifetime for the electrochemical cell.
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