公开(公告)号：US20230257539A1

公开(公告)日：2023-08-17

申请号：US18308997

申请日：2023-04-28

Applicant: UNITIKA LTD.

Inventor： Akiko Kurosawa ,  Atsuko Noda

IPC: C08J5/18 ,  B32B27/34 ,  C08J11/10 ,  C08L77/02

CPC classification number: C08J5/18 ,  B32B27/34 ,  C08J11/10 ,  C08L77/02 ,  B32B2307/518 ,  B32B2439/00 ,  C08L2207/20

Abstract: [Problem] To provide a method for producing a polyamide resin film by using a poi amide resin obtained through polymerization of a regenerated monomer used as a recycled material. [Solution] Provided is a method for producing a polyamide resin film, including: a step of producing a monomer from a raw material (A) for depolymerization, (2) a step of producing a polyamide resin (B) through polymerization using a raw material containing the monomer, (3) a step of refining the polyamide resin (B), and (4) a step of producing an unstretched film using a starting material containing the refined polyamide resin (B), and stretching the unstretched film.

公开(公告)号：US20230113769A1

公开(公告)日：2023-04-13

申请号：US17801397

申请日：2021-01-22

Applicant: UNITIKA LTD.

Inventor： Maiko SAKAI ,  Norihiro NAITO

IPC: B01J20/20 ,  B01J20/28 ,  C02F1/28 ,  B01J20/26

Abstract: An object of the present invention is to provide a water purification filter comprising activated carbon as a filtration material and a biodegradable polymer as a binder component, which water purification filter has a filtration flow rate sufficient for practical use as a pot-type water purifier while maintaining a certain free residual chlorine filtration capacity, and has a certain degree of hardness and excellent handleability. Provided is a water purification filter obtained by winding a nonwoven sheet containing fibrous activated carbon and a heat fusible core-sheath composite fiber and then heat fusing the sheet, wherein the heat fusible core-sheath composite fiber includes a sheath portion containing a biodegradable polyester resin having a melting point of 80 to 140° C. and a core portion containing a synthetic resin having a melting point at least 20° C. higher than the melting point of the biodegradable polyester resin, and wherein the water purification filter has a density of 0.12 to 0.30 g/cm3 and a specific surface area of 500 to 1800 m2/g.

公开(公告)号：US20230089078A1

公开(公告)日：2023-03-23

申请号：US17800583

申请日：2021-02-24

Applicant: UNITIKA LTD. ,  NIPPON ESTER CO., LTD.

Inventor： Yumeto Fukubayashi ,  Yuta Tenma

IPC: C08G63/87 ,  C09J167/02

Abstract: A polyester resin comprises a dicarboxylic acid component and a glycol component, wherein the glycol component contains ethylene glycol together with diethylene glycol and triethylene glycol, and a content of triethylene glycol in the glycol component is more than 0.1 mol % and 5.5 mol % or less.

公开(公告)号：US20220324751A1

公开(公告)日：2022-10-13

申请号：US17596887

申请日：2020-06-19

Applicant: Nippon Sheet Glass Company, Limited ,  UNITIKA LTD. ,  UNITIKA GLASS FIBER CO., LTD.

Inventor： Aya NAKAMURA ,  Hidetoshi FUKUCHI ,  Junji KURACHI ,  Riku SAWAI ,  Takaharu MIYAZAKI ,  Yoshito NAWA ,  Kohji HATTORI

IPC: C03C13/00 ,  C03C3/091 ,  C03C4/16 ,  C08J5/24 ,  H05K1/03 ,  C03B37/02

Abstract: The present disclosure provides a novel glass composition that has a low permittivity and is suitable for mass production. A glass composition provided satisfies, in wt %, for example, 40≤SiO2≤60, 25≤B2O3≤45, 0≤Al2O3≤18, 0

公开(公告)号：US20220168690A1

公开(公告)日：2022-06-02

申请号：US17614693

申请日：2020-06-01

Applicant: UNITIKA LTD.

Inventor： Jun TANAKA ,  Kuniko INOUE ,  Takahiro ONO

IPC: B01D53/26 ,  B01D69/08 ,  B01D71/48 ,  B01D69/02 ,  B01D71/64 ,  B01D53/22 ,  B01D63/02 ,  D01F6/62 ,  D01F1/02 ,  C08L39/06

Abstract: Provided is a hollow fiber membrane that is excellent in water vapor separation performance immediately after production and water vapor separation performance after repeated use with compressed air. A hollow fiber membrane comprising a polyarylate resin, wherein the hollow fiber membrane includes a skin layer on at least one of inner and outer surfaces, has a tensile strength of 7 MPa or more and an elongation at break of 15% or more, and has an internal pressure water permeability of less than 100 L/(m2·atm/h) as measured using pure water at 25° C.

公开(公告)号：US20220009797A1

公开(公告)日：2022-01-13

申请号：US17291857

申请日：2019-09-30

Applicant: UNITIKA LTD.

Inventor： Shinji TANIGUCHI ,  Norihiro NAITO

IPC: C02F1/28 ,  B01D39/20 ,  B01J20/20 ,  B01J20/28

Abstract: A water purification cartridge includes a casing with a tubular shape that has an inflow portion for raw water to flow in and an outflow portion for purified water to flow out, and a filter member for filtering the raw water, the filter member being accommodating within the casing. The filter member is formed to have a cylindrical shape having a hollow portion, and has a first face and a second face at respective ends in an axial direction. The casing has a first cover portion, a second cover portion, and a side wall portion. The first cover portion covers the first face. The second cover covers the second face. The side wall portion covers an outer circumferential face of the filter member. In the first cover portion, a first contact portion is formed that annularly comes into contact with the first face and that press the filter member in the axial direction to elastically deform the filter member. In the second cover portion, a second contact portion is formed that annularly comes into contact with the second face and that press the filter member in the axial direction to elastically deform the filter member.

公开(公告)号：US20210276316A1

公开(公告)日：2021-09-09

申请号：US16332123

申请日：2017-09-28

Applicant: UNITIKA LTD.

Inventor： Masafumi Yamamoto ,  Sumito Kihara ,  Takashi Ando

IPC: B32B27/36 ,  B32B27/08 ,  B32B27/20 ,  B32B7/06 ,  B32B7/12 ,  C08J5/18 ,  C08J3/22 ,  C09J7/25 ,  C08K7/00

Abstract: This polyester film has at least one surface constituted of a polyester film layer A, and is characterized in that: a polyester resin constituting the polyester film layer A has an inherent viscosity of 0.63 to 0.85 dl/g; the polyester film layer A contains organic particles and the surface of the polyester film layer A has an arithmetic average roughness (Ra) of a roughness curve of 0.2 to 1.0 μm, and an average length (RSm) of roughness curve elements of 10 to 250 μm.

公开(公告)号：US11104643B2

公开(公告)日：2021-08-31

申请号：US16930397

申请日：2020-07-16

Applicant: UNITIKA LTD.

Inventor： Yuki Yamada ,  Tatsuya Morikita ,  Takeshi Yoshida ,  Akira Shigeta ,  Yoshiaki Echigo

IPC: C07D207/448

Abstract: An object of the present invention is to provide a bismaleimide (D-BMI) modified product in which an amino group of dimer diamine (DDA) is maleimidized, which has the good heat resistance, and has the sufficiently enhanced processability, and a method for producing the same. There are provided: A bismaleimide (D-BMI) modified product in which an amino group of dimer diamine is maleimidized, the bismaleimide modified product having the following characteristics: 1) An acid value of the D-BMI modified product is 2 mg-KOH/g or less. 2) In 1H-NMR, when quantitative comparison is performed using an integrated value (A) of a peak corresponding to a proton of a methylene group directly bound to a nitrogen atom of a maleimide group and an integrated value (B) of a peak corresponding to a vinyl proton of a maleimide group, A/B is 1.25 or more and 2.00 or less. A method for producing D-BMI, the method including the following steps: 1) A step of preparing a crude D-BMI solution having an acid value of more than 2 mg-KOH/g. 2) A step of lowering an acid value of D-BMI to 2 mg-KOH/g or less by reacting an acid component in the solution with a carbodiimide compound. 3) A step of reacting the solution without a catalyst at 110 to 200° C. in a solvent.

公开(公告)号：US20210054537A1

公开(公告)日：2021-02-25

申请号：US16981592

申请日：2019-03-14

Applicant: UNITIKA LTD.

Inventor： Kohei IKEDA ,  Mariko HONDA

IPC: D01F8/14 ,  D01F8/06 ,  D01D5/08 ,  D01D5/34 ,  B32B5/02 ,  B32B5/08

Abstract: To provide a thermoforming method for obtaining a thermoformed article that exhibits excellent abrasion resistance at melt-bonded portions, and excellent adhesive strength between woven fabrics or to another kind of article. Polyethylene having a melt flow rate, measured under conditions of a temperature of 280° C. and a load of 2.16 kg, of 10 to 15 g/10 min and polyethylene terephthalate are prepared. By a conjugate melt spinning method using the polyethylene terephthalate as a core component and the polyethylene as a sheath component, multi-filament yarn in which core-sheath composite filaments having a core component:sheath component mass ratio of 1 to 4:1 are bundled is obtained. A product of filaments is obtained by weaving, knitting, braiding or winding using the multi-filament yarn. Thermoforming of the product of filaments is carried out by heating the product of filaments to melt the polyethylene, thereby melt-bonding the core-sheath composite filaments to each other, with the polyethylene terephthalate retaining its initial filament form.

公开(公告)号：US10808342B2

公开(公告)日：2020-10-20

申请号：US16033904

申请日：2018-07-12

Applicant: UNITIKA LTD.

Inventor： Hidehito Andoh ,  Kohei Ikeda

IPC: B29C65/00 ,  D04H3/045 ,  D04C1/06 ,  D04C1/02 ,  D02G3/02 ,  D04H3/147 ,  D04H3/007 ,  D04H3/011 ,  D04H3/018 ,  A01K75/00 ,  D02G3/44 ,  B29D28/00 ,  B29K667/00 ,  D02G3/36 ,  B29L28/00 ,  B29K623/00 ,  B29C65/02 ,  D01F8/14 ,  B29K67/00 ,  D01F8/06 ,  D01D5/34 ,  D02G3/04 ,  D01C1/02

Abstract: Provided is a method for manufacturing a fishing net formed from a plastic net that can be handled by winding or folding although the net has plastic rigidity. The fishing net is manufactured by (1) a step of preparing a multifilament yarn formed by bundling a plurality of core-sheath type composite filaments, in each of which a core component is made of polyethylene terephthalate and a sheath component is made of polyolefin, (2) a step of preparing a yarn thread obtained by paralleling a plurality of the multifilament yarns, (3) a step of twisting or braiding four yarn threads 11, 12, 13, 14 to obtain a net constructed with strands 1 and intersections 2, (4) a step of heat-treating the net under without pressure to melt the sheath component of the yarn threads 11, 12, 13, 14 constituting the strands 1 and the intersections 2, followed by solidifying, thus obtaining a plastic net, and (5) a step of forming the fishing net using the plastic net.