公开(公告)号：US20150209735A1

公开(公告)日：2015-07-30

申请号：US14421887

申请日：2013-08-14

Applicant: UNITIKA LTD.

Inventor： Yuki Hara ,  Takahiro Ono ,  Terumi Murata ,  Kuniko Inoue

IPC: B01D71/56 ,  C02F1/44 ,  B01D67/00 ,  B01D69/08 ,  B01D69/02

CPC classification number: B01D71/56 ,  B01D61/14 ,  B01D67/0016 ,  B01D69/02 ,  B01D69/08 ,  B01D69/087 ,  B01D2323/12 ,  B01D2323/42 ,  B01D2325/20 ,  B01D2325/36 ,  C02F1/44 ,  C02F2103/04 ,  C02F2103/343 ,  C02F2103/346

Abstract: [Problem] The purpose of the present invention is to provide a polyamide hollow fiber membrane having such properties that the transmission of fine particles through the membrane can be prevented effectively, the membrane has an excellent water transmissibility, the entire surface of the membrane has excellent hydrophilicity, and impurities such as metal elements are rarely eluted through the membrane.[Solution] A polyamide hollow fiber membrane produced by a TIPS method under specific production conditions has the following characteristic properties: (1) the contact angle of water on the surface of the membrane is 80° or less; (2) the external pressure water transmissibility of the membrane is 50 L/(m2·atm·h) or more; and (3) the 50 nm-particles blocking ratio of the membrane is 90% or more.

Abstract translation: 本发明的目的在于提供一种聚酰胺中空纤维膜，其特征在于可以有效地防止细颗粒通过膜的透过，膜具有优异的透水性，膜的整个表面具有优异的 亲水性，杂质如金属元素很少通过膜洗脱。 [解决方案]通过TIPS法在特定制造条件下制造的聚酰胺中空纤维膜具有以下特征：（1）膜表面的水的接触角为80°以下; （2）膜的外压透水率为50L /（m2·atm·h）以上; 和（3）膜的50nm粒子阻隔率为90％以上。

公开(公告)号：US3926701A

公开(公告)日：1975-12-16

申请号：US40099173

申请日：1973-09-26

Applicant: UNITIKA LTD

Inventor： NISHIWAKI HIROSHI

IPC: B41L25/18 ,  B41N7/04 ,  B21B31/08 ,  B60B7/00

CPC classification number: D04B1/16 ,  B41L25/18 ,  B41N7/04 ,  B41N2207/02 ,  B41N2207/14 ,  Y10T428/1348 ,  Y10T428/1372 ,  Y10T428/23979

Abstract: A cylindrical fabric covering of a larger diameter than a form roller of an offset printing machine contains a water shrinkable ground yarn and a hydrophilic pile yarn. The pile yarn can be cut to the desired size and the cylindrical fabric is securely fastened to the form roller by submerging the cylindrical fabric and roller in water until the fabric shrinks firmly on the roller. The resulting firmly fixed fabric covering largely eliminates the generation of lint or fluff with its resulting effects on the prints.

公开(公告)号：US3740246A

公开(公告)日：1973-06-19

申请号：US3740246D

申请日：1971-01-11

Applicant: UNITIKA LTD

Inventor： KUGA M ,  YOSHIOKA A ,  IWASAKI T ,  KYO K

IPC: B32B27/00 ,  C08J7/04 ,  B44D1/32

CPC classification number: C08J7/047 ,  B32B27/00 ,  C08J2377/00

Abstract: THE PRESENT INVENTION RELATES TO IMPROVED POLYAMIDE FILMS FORMED BY THE PROCESS UTILIZING A CONCURRENT BIAXIAL DRAWING TECHNIQUE, FOLLOWED BY HEAT-SETTING OF THE DRAWN FILM WITH SIMULTANEOUS CURING OF A RESIN COMPOSITION APPLIED TO THE FILM SURFACE WHICH IS OF A HEAT-SETTING AND HYDROPHOBIC NATURE.

公开(公告)号：US3677940A

公开(公告)日：1972-07-18

申请号：US3677940D

申请日：1971-02-16

Applicant: KURITA WATER IND LTD ,  UNITIKA LTD

Inventor： FUJIMOTO HIROSHI ,  FUKUDA MITSUGU

IPC: C02F1/24 ,  C02F1/52 ,  C02F1/54 ,  C02F9/00 ,  C02C5/02

CPC classification number: C02F1/54 ,  C02F1/24 ,  C02F1/5236 ,  C02F9/00

Abstract: A METHOD OF TREATING A WOOL SCOURING WASTE WATER AND A DYEING WASTE WATER WHICH COMPRISES THE STEPS: MIXING THE SCOURING WASTE WATER AND DYEING WASTE WATER; ADDING TO THE MIXED LIQUID THUS PREPARED A COAGULANT CONSISTING OF AN INORGANIC METALLIC SALT AND ADJUSTING THE PH TO THEREBY GIVE RISE TO FLOCS OF METALLIC HYDROXIDE; FURTHER ADDING AN ANIONIC ORGANIC COAGULANT TO THEREBY GIVE RISE TO AGGREGATION OF SAID FLOCS; AND SEPARATING THE RESULTING SLUDGE.

公开(公告)号：US3651200A

公开(公告)日：1972-03-21

申请号：US3651200D

申请日：1969-08-28

Applicant: UNITIKA LTD

Inventor： KUGA MUTSUO ,  MASHIMO TAKESHI ,  WATANABE JUNKICHI ,  ARAI TERUO ,  YANO YOSHIHIKO

IPC: B29C51/04 ,  B29C55/16 ,  B32B27/16 ,  C08J5/18 ,  C08L77/00 ,  B29C17/02

CPC classification number: B32B27/16 ,  B29C55/16 ,  C08L77/00 ,  C08L2205/02

Abstract: PRIOR TO BIAXIALLY DRAWING A POLYAMIDE FILM, THE FILM IS ELONGATED IN THE LONGITUDINAL DIRECTIN TO AN EXTENT OF 1 TO 15% IN ADDITION TO THE NATURAL ELONGATION DUE TO WATER ADSORPTION WHILE ADSORBING 2 TO 10% BY WEIGHT WATER.

THIS PRETREATMENT PREVENTS A NONUNIFORMITY DEFECT IN THE FILM TERMED "LAXATION".

公开(公告)号：US12264420B2

公开(公告)日：2025-04-01

申请号：US17279877

申请日：2019-09-26

Applicant: UNITIKA LTD.

Inventor： Kohei Ikeda ,  Mariko Honda ,  Yuta Mizuno ,  Shohei Ikegami

IPC: D04H1/541 ,  B29C65/00 ,  B29C65/02 ,  D01D5/10 ,  D01F8/12 ,  D01F8/14 ,  D02G3/04 ,  D04B1/16 ,  D04H3/045

Abstract: Provided is a thermal molding method for producing a thermally molded article having excellent abrasion resistance at its melt-fused part. Polyamide 6 and a copolyester are prepared separately. The copolyester contains terephthalic acid, ethylene glycol, and 1,4-butanediol as copolymerization units. The copolyester may further contain ε-caprolactone and/or diethylene glycol as a copolymerization unit. A multifilament yarn in which core-sheath type composite filaments each containing a core component and a sheath component at a ratio of 1 to 4:1 by mass are bundled is produced by a composite melt-spinning method using the polyamide 6 as the core component and the copolyester as the sheath component. Using the multifilament yarn, a product of filaments is produced by weaving, knitting, knitting and braiding, or braiding. The product of filaments is heated to melt the copolyester and fuse the core-sheath type composite filaments to each other while retaining the initial filament form of the polyamide 6, thus thermally molding the product of filaments.

公开(公告)号：US20240026151A1

公开(公告)日：2024-01-25

申请号：US17768811

申请日：2020-10-12

Applicant: UNITIKA LTD.

Inventor： Yutaka NABESHIMA

IPC: C08L69/00 ,  C08K3/36 ,  C08K3/04

CPC classification number: C08L69/00 ,  C08K3/36 ,  C08K3/041 ,  C08K2201/005 ,  C08K2201/003

Abstract: The present invention provides a resin composition, from which a molded product excellent in a dust-generating resistance property, heat-resisting properties, a dimensional stability, sliding properties, mechanical properties and external appearance properties can be molded and which is excellent in a molding stability, and a molded product which is obtained by molding the same. The present invention relates to a resin composition comprising a polyarylate resin, a polycarbonate resin, silica particles having an average particle diameter of 0.4 to 12 μm, fluorine atom-containing polymer particles having an average particle diameter of 0.5 to 20 μm, and a particular phosphite ester compound, wherein a mass ratio of the polyarylate resin and the polycarbonate resin is 25/75 to 92/8, a content of the silica particles is 4 to 65 parts by mass with respect to 100 parts by mass of a total amount of the polyarylate resin and the polycarbonate resin, a content of the fluorine atom-containing polymer particles is 0.5 to 12 parts by mass with respect to 100 parts by mass of a total amount of the polyarylate resin and the polycarbonate resin, and a content of the phosphite ester compound is 0.008 to 1.2 parts by mass with respect to 100 parts by mass of a total amount of the polyarylate resin and the polycarbonate resin.

公开(公告)号：US20240018316A1

公开(公告)日：2024-01-18

申请号：US17619613

申请日：2021-03-08

Applicant: UNITIKA LTD.

Inventor： Hiroshi Ashihara ,  Takayoshi Okuzu ,  Ken Akamatsu ,  Akiko Kurosawa ,  Goro Araki ,  Akito Kajita

IPC: C08J5/18 ,  C08G63/183 ,  B29C48/00 ,  B29C48/08

CPC classification number: C08J5/18 ,  C08G63/183 ,  B29C48/022 ,  B29C48/08 ,  B29C48/0018 ,  B29K2067/003

Abstract: A polyester film includes a polyester (A) composed mainly of polybutylene terephthalate and a polyester (B) composed mainly of polyethylene terephthalate,



wherein a mass ratio (A/B) between the polyesters (A) and (B) is 70/30 to 55/45, a dry heat shrinkage rate (B) through heat treatment at 200° C. for 15 minutes is 35% or less in any of four directions (0°, 45° 90° and 135°) on the film surface, a difference between a maximum value and a minimum value of these dry heat shrinkage rates is 5% or less, a thickness variation in the four directions is 10% or less, and a crystallization index shown in DSC measurement is 25 to 55 J/g.

公开(公告)号：US20230330599A1

公开(公告)日：2023-10-19

申请号：US18028789

申请日：2021-09-24

Applicant: UNITIKA LTD. ,  NATIONAL UNIVERSITY CORPORATION KOBE UNIVERSITY

Inventor： Ryota NAKAMURA ,  Kuniko INOUE ,  Kyohei UMAKOSHI ,  Takahiro ONO ,  Hideto MATSUYAMA

IPC: B01D61/02 ,  B01D71/56 ,  B01D69/02 ,  B01D69/08 ,  B01D67/00 ,  C07C29/76

CPC classification number: B01D61/027 ,  B01D71/56 ,  B01D69/02 ,  B01D69/081 ,  B01D67/00165 ,  B01D67/0095 ,  B01D67/0086 ,  C07C29/76 ,  B01D2325/34 ,  B01D2325/20 ,  B01D2323/081 ,  B01D2323/60

Abstract: An object of the present invention is to provide a nanofiltration membrane having a molecular weight cut-off of 200 to 1,000 and a high amount pf permeate for methanol, and suitable for use as an organic solvent nanofiltration membrane. A nanofiltration membrane formed using a polyamide resin, the nanofiltration membrane having a molecular weight cut-off of 200 to 1,000 and a methanol permeability of 0.03 L/(m2·bar·h) or more.

公开(公告)号：US20230312847A1

公开(公告)日：2023-10-05

申请号：US18015180

申请日：2022-03-25

Applicant: UNITIKA LTD.

Inventor： Yuki AOYAMA ,  Takashi OKABE ,  Shuhei YAMANE ,  Tomoko YAMANAKA

IPC: C08J5/18 ,  B32B17/10 ,  B32B27/34 ,  B32B15/088 ,  B29C55/12 ,  B29C71/02

CPC classification number: C08J5/18 ,  B29C55/12 ,  B29C71/02 ,  B32B15/088 ,  B32B17/10724 ,  B32B27/34 ,  B32B2250/02 ,  B32B2307/558 ,  B32B2307/734 ,  B32B2457/20 ,  C08J2377/10

Abstract: Provided is a semiaromatic polyamide film having an average linear expansion coefficient in the width direction, measured under conditions of 20 to 125° C., of -90 to 0 ppm/°C.