×

LAMINATED BODY

  • US 20170365832A1
  • Filed: 06/20/2017
  • Published: 12/21/2017
  • Est. Priority Date: 06/21/2016
  • Status: Active Grant
First Claim
Patent Images

1. A laminated body, comprising:

  • a porous base material containing a polyolefin-based resin as a main component; and

    a porous layer which is disposed on at least one surface of the porous base material and which contains a polyvinylidene fluoride-based resin,the porous base material having a piercing strength of not less than 26.0 gf/g/m2, which piercing strength is measured with respect to a weight per unit area of the porous base material,the porous base material having a value in a range of 0.00 to 0.54, which value is represented by the following Expression (1);


    |1−

    T/M|



    (1)where (i) T represents a distance by which the porous base material moves in a traverse direction from a starting point of measurement to a point where a critical load is obtained in a scratch test under a constant load of 0.1 N and (ii) M represents a distance by which the porous base material moves in a machine direction from a starting point of measurement to a point where a critical load is obtained in a scratch test under a constant load of 0.1 N,the polyvinylidene fluoride-based resin containing crystal form α

    in an amount of not less than 36 mol % with respect to 100 mol % of a total amount of the crystal form α and

    crystal form β

    contained in the polyvinylidene fluoride-based resin,where the amount of the crystal form α

    is calculated from an absorption intensity at around 765 cm

    1
    in an IR spectrum of the porous layer, and an amount of the crystal form β

    is calculated from an absorption intensity at around 840 cm

    1
    in the IR spectrum of the porous layer.

View all claims
  • 1 Assignment
Timeline View
Assignment View
    ×
    ×