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Swelling tape for filling gap

  • US 9,862,864 B2
  • Filed: 07/24/2013
  • Issued: 01/09/2018
  • Est. Priority Date: 01/27/2011
  • Status: Active Grant
First Claim
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1. A swelling tape for filling a gap, comprising:

  • a substrate layer that deforms along a longitudinal direction when coming in contact with a fluid; and

    a pressure-sensitive adhesive layer formed on one surface of the substrate layer in a direction parallel to a longitudinal direction of the substrate layer,wherein the substrate layer is a layer selected from the group consisting of;

    a cast layer of a composition consisting essentially of 30 parts by weight to 99 parts by weight of an energy ray-polymerizable acrylate compound and 1 part by weight to 70 parts by weight of a radical-polymerizable diluents;

    a cast layer of a composition comprising a polyol and an isocyanate compound;

    a layer comprising thermoplastic polyurethane; and

    a layer comprising a cellulose acetate resin or a cellulose alkylate resin,wherein the substrate layer forms a three-dimensional structure when coming in contact with a fluid,wherein the three-dimensional structure includes a shape protruding along the vertical direction and wherein a plurality of the shapes are included in the three-dimensional structure, andwherein the substrate layer has a strain of at least 10% in a longitudinal direction according to Equation 1;


    Strain in Longitudinal direction=(L2

    L
    1)/L1×

    100, 



    [Equation1]wherein L1 is an initial length of the substrate layer before the substrate layer comes in contact with the fluid; and

    L2 is a length of the substrate layer, which is measured after the substrate layer comes in contact with the fluid at room temperature or 60°

    C. for 24 hours.

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