公开(公告)号：US3126434A

公开(公告)日：1964-03-24

申请号：US12604261

申请日：1961-07-24

IPC: D01D5/088

CPC classification number: D01D5/0885

公开(公告)号：US3061874A

公开(公告)日：1962-11-06

申请号：US7119460

申请日：1960-11-23

Applicant: DU PONT

Inventor： LEES RAY F

IPC: D01D5/088 ,  D01D5/23

CPC classification number: D01D5/23 ,  D01D5/088

公开(公告)号：US2832642A

公开(公告)日：1958-04-29

申请号：US55711756

申请日：1956-01-03

Applicant: DOW CHEMICAL CO

Inventor： LENNOX FORREST R

IPC: D01D5/04 ,  D01D5/08 ,  D01D5/088

CPC classification number: D01D5/04 ,  D01D5/08 ,  D01D5/088

公开(公告)号：US12188158B2

公开(公告)日：2025-01-07

申请号：US17791516

申请日：2020-01-31

Applicant: Kimberly-Clark Worldwide, Inc.

Inventor： Eric E. Lennon ,  Bryan D. Haynes ,  Sara Honarbakhsh ,  Craig A. Barnes ,  David A. Palzewicz

IPC: B29C48/05 ,  B29C48/30 ,  D01D4/02 ,  D01D4/06 ,  D01D5/088 ,  D01D5/098 ,  D01D7/00 ,  D01D13/00 ,  D01F6/06 ,  D04H3/007 ,  D04H3/147 ,  D04H3/16 ,  D04H3/016

Abstract: A method of making nonwoven webs comprising providing a spinneret including a pattern of conduits forming an extrusion region; directing only a first stream of molten propylene polymer into a region adjacent the first side of the spinneret, directing only a second stream of molten propylene polymer into a region distal to the first side of the spinneret, extruding only the first stream propylene polymer through the exit openings in a first zone where the exit opening comprises exit ports in the first zone having a first density; extruding only the second stream propylene polymer through the exit openings of a second zone where the exit opening comprises exit ports in the second zone having a second density less than the first density; and the second zone is distal to the first side with the first zone being between the second zone and the first side.

公开(公告)号：US11959192B2

公开(公告)日：2024-04-16

申请号：US17620732

申请日：2020-12-29

Applicant: BOCHVAR HIGH-TECHNOLOGY RESEARCH INSTITUTE FOR INORGANIC MATERIALS

Inventor： Leonid Aleksandrovich Karpyuk ,  Vladislav Konstantinovich Orlov ,  Sergey Igorevich Ivanov ,  Alexey Vladimirovich Glebov ,  Fyodor Viktorovich Makarov ,  Roman Gennadyevich Zakharov ,  Ivan Alexandrovich Dzyubinsky ,  Alexander Pavlovich Ponomarenko ,  Dmitry Vladimirovich Zhigalov ,  Alexander Pavlovich Korolev ,  Artem Andreevich Vorobyov

IPC: D01D5/088 ,  C01B32/977 ,  D01F9/08

CPC classification number: D01D5/088 ,  C01B32/977 ,  D01F9/08

Abstract: The method for producing non-core beta silicon carbide fibers includes four steps. The first step is spinning of multifilament polymeric fiber by melt-extrusion of polycarbosilane. The second step is thermooxidative cross-linking for which the produced spun polymeric fibers are cured in an oxidation furnace at a temperature of 175-250 degrees C. at a heating rate of 3-10 degrees C./h until their weight is increased by 6-15%. The third step is carbonization of the produced cured polymeric fibers with the conversion into the ceramic phase. The fourth step is finishing of the produced beta silicon carbide fiber. The effect of the invention is producing non-core silicon carbide fibers, improving their strength performance, improving resistance to high temperatures and their high creep resistance, stable fiber properties, optimal average diameter of fibers, absence of foreign impurities in the fiber composition.

公开(公告)号：US11946169B2

公开(公告)日：2024-04-02

申请号：US17344365

申请日：2021-06-10

Applicant: PFNONWOVENS LLC

Inventor： Karthik Ramaratnam ,  John C. Parsons ,  David John Pung ,  Anna Elizabeth Macura ,  Eric Bryan Bond

IPC: B01D37/00 ,  D01D1/10 ,  D01D5/08 ,  D01D5/088 ,  D01D7/00 ,  D01F6/06 ,  D01F8/06 ,  D04H3/007 ,  D04H3/16 ,  B29K23/00 ,  B29K105/26 ,  B32B37/00

CPC classification number: D01F8/06 ,  D01D1/106 ,  D01D5/08 ,  D01F6/06 ,  D04H3/16 ,  B29K2023/12 ,  B29K2105/26 ,  B32B37/0084 ,  B32B2262/0253 ,  B32B2305/20 ,  B32B2305/70 ,  D10B2321/022

Abstract: A process for making a spunmelt nonwoven web including the steps of providing a mixture of recycled polypropylene, extruding the recycled polypropylene mixture to form a molten recycled polypropylene mixture, filtering the molten recycled polypropylene mixture through a filter to form recycled polypropylene filtrate, dosing the recycled polypropylene filtrate into the spunmelt production line by an amount of 80% to 100% by weight, passing the recycled polypropylene filtrate through at least one spinneret of the spunmelt production line to form filaments at a spinning speed of greater than 1200 meters per minute, cooling and drawing the filaments, and depositing the filaments on a moving belt to form at least one layer of the spunmelt nonwoven web made up of 80% by 100% by weight of recycled polypropylene fibers.

公开(公告)号：US20240018694A1

公开(公告)日：2024-01-18

申请号：US17995057

申请日：2022-03-31

Applicant: KB SEIREN, LTD.

Inventor： Hiroyuki YAMASHITA

IPC: D01F6/74 ,  D01D5/088 ,  D01D7/00 ,  D01D10/02

CPC classification number: D01F6/74 ,  D01D5/088 ,  D01D7/00 ,  D01D10/02 ,  D10B2401/063 ,  D10B2401/04 ,  D10B2331/14

Abstract: A polyphenylene sulfide monofilament has a phenylene sulfide unit as a main structural unit and satisfies (1) to (5):



(1) a fineness of 6 to 35 dtex;
(2) a breaking strength of 3.4 cN/dtex or more;
(3) a breaking elongation of 24% to 45%;
(4) a 5% modulus of 1.0 to 1.6 cN/dtex; and
(5) a 10% modulus of 1.4 to 2.3 cN/dtex.

公开(公告)号：US11866849B2

公开(公告)日：2024-01-09

申请号：US16824775

申请日：2020-03-20

Applicant: Braskem America, Inc.

Inventor： Marcos Roberto Paulino Bueno ,  Andre Penaquioni ,  Alessandro Bernardi ,  Sergio Luiz Dias Almeida ,  Leandro Ohara Oliveira Santa Rosa ,  Patricia Freitas Oliveira Fialho ,  Daniela Zaira Rauber

IPC: D01D1/02 ,  D01D5/06 ,  B29C48/05 ,  B29C48/00 ,  B29C48/29 ,  D01D10/06 ,  B29B7/00 ,  B29B7/46 ,  D01D1/09 ,  D01F13/00 ,  B29C43/00 ,  D01D13/00 ,  B29C48/793 ,  D01D5/16 ,  B29B7/74 ,  D07B1/02 ,  D01D1/06 ,  D01D5/088 ,  B29B7/72 ,  B29C48/91 ,  D01F6/04 ,  B29C48/88 ,  D06B15/00 ,  B29B7/44 ,  B29C48/86

CPC classification number: D01D1/02 ,  B29B7/007 ,  B29B7/46 ,  B29B7/726 ,  B29B7/749 ,  B29C43/00 ,  B29C48/0018 ,  B29C48/05 ,  B29C48/29 ,  B29C48/793 ,  D01D1/06 ,  D01D1/09 ,  D01D5/06 ,  D01D5/088 ,  D01D5/16 ,  D01D10/06 ,  D01D13/00 ,  D01F13/00 ,  D07B1/025 ,  B29B7/44 ,  B29B7/7461 ,  B29C48/86 ,  B29C48/91 ,  B29C48/919 ,  D01F6/04 ,  D06B15/00 ,  D07B2201/2009 ,  D07B2205/2014 ,  D07B2501/2061 ,  D10B2321/0211 ,  Y02P70/62 ,  D07B2205/2014 ,  D07B2801/10

Abstract: The present invention is directed to a method and a system for the production of at least one polymeric yarn comprising means for mixing a polymer (1) with a first solvent yielding a mixture; means for homogenizing the mixture; means for rendering the mixture inert (21, 22, 23); means for dipping the mixture into a quenching bath (30), wherein an air gap is maintained before the mixture reaches the quenching bath (30) liquid surface forming at least one polymeric yarn; means for drawing (41) the at least one polymeric yarn at least once; means for washing (5) the at least one polymeric yarn with a second solvent that is more volatile than the first solvent; means for heating the at least one polymeric yarn (6); means for drawing at room temperature (7) the at least one polymeric yarn at least once; and means for heat drawing (8) the at least one polymeric yarn at least once.
The instant invention also concerns a system and method of dosing a polymer mixture with a first solvent into an extruder (26), a device (5), a system and a method of solvent extraction from at least one polymeric yarn, and a method and system of mechanical pre-recovery (4) of at least one liquid in at least one polymeric yarn.

公开(公告)号：US20230395815A1

公开(公告)日：2023-12-07

申请号：US18265437

申请日：2021-08-06

Applicant: DONGHUA UNIVERSITY

Inventor： Biao WANG ,  Tongqing QU ,  Xiyi HUANG

IPC: H01M4/88 ,  H01M4/86 ,  D01D5/088 ,  D01F6/94 ,  D01D5/06 ,  D01D5/04 ,  D01D5/28 ,  D21H13/50 ,  D21H13/22 ,  D21H21/08 ,  D21H17/53 ,  D21H25/02

CPC classification number: H01M4/8807 ,  H01M4/861 ,  H01M4/8817 ,  H01M4/8875 ,  D01D5/088 ,  D01F6/94 ,  D01D5/06 ,  D01D5/04 ,  D01D5/28 ,  D21H13/50 ,  D21H13/22 ,  D21H21/08 ,  D21H17/53 ,  D21H25/02 ,  H01M2008/1095

Abstract: A gas diffusion layer for proton exchange membrane fuel cell and preparation method thereof are provided. The preparation method is to papermake and dry carbon fiber suspension mainly composed of a fibrous binder, water, a dispersant and carbon fibers with different aspect ratios to obtain a carbon fiber base paper, and then carbonize and graphitize under the protection of nitrogen or inert gas to obtain a gas diffusion layer for proton exchange membrane fuel cell; where the fibrous binder is a composite fiber or a blend fiber composed of a phenolic resin and other resin; where the prepared gas diffusion layer for proton exchange membrane fuel cell has a pore gradient, and the layer with the smallest pore size is an intrinsic microporous layer.

公开(公告)号：US20230349074A1

公开(公告)日：2023-11-02

申请号：US18349998

申请日：2023-07-11

Applicant: The Procter & Gamble Company

Inventor： Arman Ashraf ,  Kelyn Anne Arora ,  Paul Thomas Weisman ,  Nathan Ray Whitely

IPC: D01D5/098 ,  A61F13/15 ,  B32B37/00 ,  A61F13/551 ,  A61F13/49 ,  D04H3/02 ,  D01F6/06 ,  A61F13/511 ,  B32B37/15 ,  D01D5/088 ,  B32B5/02 ,  D04H3/10 ,  B32B38/00 ,  D01F8/06 ,  D04H3/16 ,  D04H3/14 ,  B29C69/00 ,  D06C3/06 ,  B32B38/04

CPC classification number: D01D5/0985 ,  A61F13/15658 ,  B32B37/0084 ,  A61F13/55115 ,  A61F13/4902 ,  D04H3/02 ,  D01F6/06 ,  A61F13/51104 ,  B32B37/153 ,  D01D5/088 ,  B32B5/022 ,  D04H3/102 ,  B32B37/156 ,  B32B38/0004 ,  A61F13/15252 ,  D01F8/06 ,  D04H3/16 ,  D04H3/14 ,  B29C69/001 ,  D06C3/067 ,  B32B2555/02 ,  A61F2013/15552 ,  B32B2038/047 ,  A61F2013/1526 ,  A61F2013/15406 ,  D10B2509/026 ,  A61F2013/49092 ,  A61F2013/15373 ,  B29C2793/0045 ,  D10B2403/033

Abstract: A nonwoven fabric comprises a first surface, a second surface, and a visually discernible pattern on at least one of the first and second surfaces. The visually discernible pattern has a regular, repeating pattern of three-dimensional features. Each of the three-dimensional features define a microzone comprising a first region and a second region. The first and second regions having a difference in values for an intensive property. The first surface has a TS7 value in the range of about 1 dB V2 rms to about 15 dB V2 rms. The second surface has a TS7 value in the range of about 1 dB V2 rms to about 15 dB V2 rms. A ratio of the TS7 value of the first surface to the TS7 value of the second surface is in the range of about 1 to about 3.