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公开(公告)号：US20240166836A1
公开(公告)日：2024-05-23
申请号：US18553026
申请日：2022-03-01
申请人： JSP Corporation
发明人： Tatsuya HAYASHI
CPC分类号： C08J9/16 , C08J9/0052 , C08J9/0066 , C08J2205/052 , C08J2377/06
摘要： A method for producing a polyamide-based resin expanded bead, the method comprising expanding a polyamide-based resin bead using a physical blowing agent, wherein the polyamide-based resin bead comprises a coloring pigment and a higher fatty acid metal salt having 12 to 24 carbon atoms; a metal in the higher fatty acid metal salt is one or more metals selected from the group consisting of magnesium, aluminum, and zinc; and a content of the higher fatty acid metal salt in the polyamide-based resin bead is 500 to 5000 mass ppm.
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公开(公告)号：US20210253819A1
公开(公告)日：2021-08-19
申请号：US17171732
申请日：2021-02-09
申请人： JSP Corporation
发明人： Tatsuya HAYASHI
IPC分类号： C08J9/18
摘要： Polyamide-based resin expanded beads having a crystallite size of more than 8 nm as measured by X-ray diffraction method are provided.
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3.发明申请公开(公告)号：US20190382550A1
公开(公告)日：2019-12-19
申请号：US16463755
申请日：2017-11-15
申请人： JSP Corporation
摘要： The present invention provides expanded beads of thermoplastic polyurethane, wherein the thermoplastic polyurethane constituting the expanded beads is an ether-based thermoplastic polyurethane, and a difference (T1−T2) between a melting peak temperature (T1) and a melting peak temperature (T2) is from 0 to 8° C., wherein the melting peak temperature (T1) is a melting peak temperature at the time of first heating in a DSC curve obtained by heating the expanded beads from 20° C. to 260° C. at a heating rate of 10° C./min, the melting peak temperature (T2) is a melting peak temperature at the time of second heating in a DSC curve obtained by cooling from 260° C. to 20° C. at a cooling rate of 10° C./min after the first heating and further heating again from 20° C. to 260° C. at a heating rate of 10° C./min, and the DSC curves are obtained by the heat flux differential scanning calorimetry in conformity with JIS K7121-1987. The expanded beads of thermoplastic polyurethane not only have excellent surface appearance and fusion bonding properties but also have a low shrinkage factor.
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公开(公告)号：US20230053755A1
公开(公告)日：2023-02-23
申请号：US17794760
申请日：2021-02-01
申请人： JSP CORPORATION
发明人： Tatsuya HAYASHI
IPC分类号： C08J9/16
摘要： Polyamide-based resin expanded beads contain a polyamide-based resin as a base material resin. The beads have a crystal structure, an intrinsic peak of the polyamide-based resin and a high-temperature peak having a peak top temperature on a higher temperature side than a peak top temperature of the intrinsic peak appear in a DSC curve obtained under a predetermined condition; an amount of heat of fusion of the high-temperature peak is within 5 J/g or more and 50 J/g or less; and a coefficient of variation of the amount of heat of fusion of the high-temperature peak is 20% or less. The beads are produced by in-mold molding. A method for producing the beads includes: impregnating a polyamide-based resin; and releasing expandable polyamide-based resin beads from a sealed container, a temperature in the sealed container is raised at a rate of 0.3° C. or higher and 1.5° C. or lower per 10 minutes.
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5.发明申请公开(公告)号：US20210253818A1
公开(公告)日：2021-08-19
申请号：US17168762
申请日：2021-02-05
申请人： JSP CORPORATION
发明人： Tatsuya HAYASHI
摘要： The polyamide-based resin expanded beads are expanded beads including a polyamide-based resin as a base resin, in which the average value of bead weight of the expanded beads is 0.5 mg or more and 8 mg or less, the coefficient of variation of the bead weight of the expanded beads is 10% or less, and the average value of the ratio of a long diameter to a short diameter (a long diameter/a short diameter) of the expanded beads measured with a projection image photographing type bead size distribution analyzer is 1 or more and 1.5 or less, the coefficient of variation of the ratio (a long diameter/a short diameter) is 12% or less, the average value of the a short diameter is 1 mm or more and 4 mm or less, and the coefficient of variation of the a short diameter is 10% or less.
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公开(公告)号：US20200032025A1
公开(公告)日：2020-01-30
申请号：US16491456
申请日：2018-03-01
申请人： JSP Corporation
摘要： The present invention relates to an expanded beads molded article, which is obtained through in-mold molding of expanded thermoplastic elastomer beads, has voids, and has a density of 150 to 300 kg/m3 and a voidage of 10 to 70% by volume.
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公开(公告)号：US20210189089A1
公开(公告)日：2021-06-24
申请号：US17273232
申请日：2019-09-04
申请人： JSP Corporation
发明人： Tatsuya HAYASHI , Akinobu HIRA
IPC分类号： C08J9/18
摘要： A polyamide-based resin expanded bead comprising a foam layer formed by expanding a polyamide-based resin, wherein on a first DSC curve and a second DSC curve, the first DSC curve has a melting peak (intrinsic peak) having a peak top temperature on a low temperature side equal to or lower than a peak top temperature of a melting peak of the second DSC curve and a melting peak (high temperature peak) having a peak top temperature on a high temperature side exceeding the peak top temperature of the second DSC curve, and, the peak top temperature of the melting peak of the second DSC curve is 180° C. or higher and 280° C. or lower, and the polyamide-based resin expanded bead has an apparent density of 10 to 300 kg/m3 and a closed cell ratio of 85% or more.
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公开(公告)号：US20210095091A1
公开(公告)日：2021-04-01
申请号：US16634637
申请日：2018-08-01
申请人： JSP Corporation
IPC分类号： C08J9/16
摘要： The present invention relates to expanded thermoplastic urethane-based elastomer beads including, as a base material, a thermoplastic urethane-based elastomer having a melting point Tm of 175° C. or higher and such a glass transition temperature Tg that a difference (Tm-Tg) between the melting point Tm and the glass transition temperature Tg is 200° C. or more.
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公开(公告)号：US20190153189A1
公开(公告)日：2019-05-23
申请号：US16313236
申请日：2017-05-12
申请人： JSP Corporation
摘要： An in-mold molded article of expanded thermoplastic polyurethane beads containing a colorant, wherein when an average surface cell wall thickness of the in-mold molded article is 20 μm or more, the expanded TPU beads molded article is high in uniformity of color and good in color developing properties. Expanded thermoplastic polyurethane beads containing a colorant, wherein when an apparent density of the expanded beads is 80 to 300 kg/m3, an average cell diameter of the expanded beads is 100 to 400 μm, and an average surface cell wall thickness of the expanded beads is 15 μm or more, a molded article resulting from in-mold molding of the expanded beads is suppressed in color unevenness and has high uniformity of color.
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公开(公告)号：US20190112444A1
公开(公告)日：2019-04-18
申请号：US16088713
申请日：2017-03-27
申请人： JSP Corporation
摘要： Provided are spherical expanded beads obtained through expansion of thermoplastic polyurethane beads, wherein a bead mass of the expanded beads is 3 to 12 mg, and a ratio of a long diameter to a short diameter of the expanded bead (long diameter/short diameter) is 1.5 or less; an apparent density of the expanded beads is 80 to 300 kg/m3; an average cell diameter Da of the expanded beads is 80 to 300 μm; and a closed cell ratio of the expanded beads is 80% or more.
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