公开(公告)号：US20210087715A1

公开(公告)日：2021-03-25

申请号：US16971932

申请日：2019-02-25

Applicant: IDEMITSU KOSAN CO.,LTD.

Inventor： Takumi SUGIUCHI ,  Yutaka MINAMI ,  Mari YABE

IPC: D01F6/46 ,  D04H1/4291 ,  C08F110/06 ,  C08L23/12

Abstract: The present invention relates to a fiber including a thermoplastic resin composition containing a polypropylene-based resin (A) in which a melting endotherm (ΔH-D) obtained from a melting endothermic curve obtained by holding a sample under a nitrogen atmosphere at -10° C. for 5 minutes and then increasing the temperature at a rate of 10° C./min by using a differential scanning calorimeter (DSC) is 0 J/g or more and 80 J/g or less, and a melt flow rate (MFR) measured under a condition at a temperature of 230° C. and a load of 2.16 kg in conformity with JIS K7210 is 1,000 g/10 min or more; and a polypropylene-based resin (B) (exclusive of the polypropylene-based resin (A)) having a melting point (Tm-D) of higher than 120° C., the fiber having a fiber diameter of 2.0 denier or less.

公开(公告)号：US20200157327A1

公开(公告)日：2020-05-21

申请号：US16632752

申请日：2018-07-23

Applicant: IDEMITSU KOSAN CO.,LTD.

Inventor： Mari YABE ,  Takumi SUGIUCHI ,  Yutaka MINAMI ,  Tomoaki TAKEBE

IPC: C08L23/12 ,  D04H3/10 ,  D01F8/06 ,  D04H3/007 ,  D04H3/14 ,  D01F1/10 ,  D04H3/147 ,  D01F6/06

Abstract: The present invention relates to [1] a polypropylene-based resin composition satisfying the following requirements (1) and (2) in a differential molecular weight distribution curve which is obtained from measurement by the gel permeation chromatography using polystyrene as a conversion standard, and in which the abscissa represents a logarithmic value log(M) of a molecular weight M, and the ordinate represents a dw/d log(M) value obtained by differentiating a concentration fraction w by the logarithmic value log(M) of the molecular weight: (1) In the differential molecular weight distribution curve, a value obtained by integrating the dw/d log(M) values in the range of (5.5≤log(M)) is 25% or less relative to a value obtained by integrating the dw/d log(M) values over the entire range of log(M); and (2) In the differential molecular weight distribution curve, a value obtained by integrating the dw/d log(M) values in the range of (log(M)≤4.5) is more than 10% relative to a value obtained by integrating the dw/d log(M) values over the entire range of log(M). The present invention also relates to [2] a polypropylene-based resin composition having a melt flow rate (MFR) of 10 to 500 g/10 min and a half-crystallization time of more than 0.05 seconds; and further relates to [3] a polypropylene-based resin composition containing 40 to 990/% by mass of a polypropylene-based resin (A) having a melting point (Tm-D) of higher than 120° C., 0.5 to 59.5% by mass of a polypropylene-based resin (B-1) having a melting endotherm (ΔH-D) of 0 to 80 J/g, and 0.5 to 59.5% by mass of a wax (B-2).

公开(公告)号：US20210404099A1

公开(公告)日：2021-12-30

申请号：US17290926

申请日：2019-11-06

Applicant: IDEMITSU KOSAN CO.,LTD.

Inventor： Mari YABE ,  Takumi SUGIUCHI ,  Masaki OKANO ,  Yutaka MINAMI

IPC: D04H3/147 ,  D04H3/007 ,  D04H3/018 ,  D01F8/06 ,  C08L23/12 ,  C08L23/04

Abstract: The present invention relates to a nonwoven fabric including a conjugated fiber containing 40% by mass or more and 80% by mass or less of a propylene homopolymer (A) having a melting point (Tm-D) measured by a differential scanning calorimeter (DSC) of higher than 120° C., 4% by mass or more and 40% by mass or less of a polypropylene-based resin (B) having a melting point (Tm-D) measured by a differential scanning calorimeter (DSC) of 120° C. or lower, and 10% by mass or more and 55% by mass or less of a polyethylene-based resin (C), wherein the nonwoven fabric has a texture uniformity of 2.1 or more and 3.0 or less and a bulkiness of 450 μm or more.

公开(公告)号：US20200071867A1

公开(公告)日：2020-03-05

申请号：US16613524

申请日：2018-05-16

Applicant: IDEMITSU KOSAN CO., LTD.

Inventor： Mari YABE ,  Takumi SUGIUCHI ,  Yutaka MINAMI ,  Tomoaki TAKEBE

IPC: D04H3/147 ,  D04H3/007 ,  D01F8/06 ,  D01D5/22

Abstract: The present invention relates to a crimped fiber including one component thereof containing a thermoplastic resin (A) and another component thereof containing a thermoplastic resin (B) and a thermoplastic resin (C), wherein a half-crystallization time at 25° C. of the thermoplastic resin (A) is shorter than a half-crystallization time at 25° C. of the thermoplastic resin (B), and a half-crystallization time at 25° C. of the thermoplastic resin (C) is longer than the half-crystallization time at 25° C. of the thermoplastic resin (B).