POLYPROPYLENE FILM, LAMINATE, PACKAGING MATERIAL, AND PACKING BODY

    公开(公告)号:US20240123717A1

    公开(公告)日:2024-04-18

    申请号:US18280515

    申请日:2022-03-28

    Abstract: This polypropylene film has a polypropylene-based resin as a main component, and is configured such that the value (strength X) obtained by multiplying the film thickness by the F5 value in a direction perpendicular to the principal orientation axis is 400 N/m or more and 2000 N/m or less. As measured by thermomechanical analysis (TMA), when: the thermal shrinkage (%) at 100° C. in a direction perpendicular to the principal orientation axis is SMD, 100° C.; the thermal shrinkage at 130° C. in a direction perpendicular to the principal orientation axis is SMD, 130° C.; the thermal shrinkage at 100° C. in the principal orientation axis direction is STD, 100° C.; and the thermal shrinkage at 130° C. in the principal orientation axis direction is STD, 130° C., the propropylene film satisfies |SMD, 100° C.−SMD, 130° C.|≤2.00 and |STD, 100° C.−STD, 130° C.|≤2.50.

    Method for producing fiber-reinforced plastic

    公开(公告)号:US11951695B2

    公开(公告)日:2024-04-09

    申请号:US16482434

    申请日:2018-01-19

    Abstract: Provided are methods for producing a fiber-reinforced plastic having high mechanical properties and high productivity during molding of a complicated shape.
    In one aspect, the method produces a fiber-reinforced plastic using a tape substrate A and a sheet substrate B, the tape substrate A being a tape-shaped substrate including one or more sheets of incised prepreg a; the incised prepreg a being a prepreg including unidirectionally oriented reinforcing fibers and a resin and having a plurality of incisions dividing the reinforcing fibers formed in the prepreg, and satisfying the following condition 1; the sheet substrate B being a substrate including randomly oriented reinforcing fibers and a resin. In another aspect, the method for producing a fiber-reinforced plastic includes: a placement step \ (A) of placing a plurality of tape substrates A on a mold such that each of the sheet substrates A forms an overlapping portion in which the sheet substrate A overlaps one or more other sheet substrates A and a non-overlapping portion in which the sheet substrate A does not overlap any other sheet substrates A, a placement step (B) of placing a sheet substrate B, and a molding step of heating and pressing the tape substrates A and the sheet substrate B placed.
    Condition 1 is: the average length xa of the incisions and the average length ya of the reinforcing fibers divided by the incisions satisfy ya>6.0xa+10.

    GRAPHENE DISPERSION LIQUID AND POSITIVE ELECTRODE PASTE

    公开(公告)号:US20240105956A1

    公开(公告)日:2024-03-28

    申请号:US17769029

    申请日:2020-11-06

    CPC classification number: H01M4/625 C01B32/194 H01M2004/028

    Abstract: A graphene dispersion liquid containing graphene and a solvent, wherein the graphene has an average thickness of 0.3 nm or more and 10 nm or less, wherein the solvent has a solubility parameter δ of 18 MPa0.5 or more and 28 MPa0.5 or less, and wherein the graphene dispersion liquid has a viscosity of 10,000 mPa·s or less at a graphene concentration adjusted to 3 weight %, at a shear rate of 10 sec−1, and at a temperature of 25° C. Provided are: a graphene dispersion liquid that has excellent fluidity and dispersibility, and affords a coating film having excellent coating film uniformity; and a positive electrode paste that makes it possible to enhance the coating film uniformity and the battery life by virtue of the graphene dispersion liquid.

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