Swelling tape for filling gap

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 that includes a urethane bond, an ester bond or an ether bond, or a cellulose ester compound;
• 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 single layer consisting essentially of an acrylate-based substrate layer, a urethane-based substrate layer, an epoxy-based substrate layer or a cellulose-based substrate layer,
• wherein the acrylate-based substrate layer or the epoxy-based substrate layer is a cast layer of an active energy ray-curable composition, wherein the urethane-based substrate layer is a cast layer of an active energy ray-curable composition or a curable urethane composition or comprises only a thermoplastic polyurethane as a resin component, wherein the cellulose-based substrate layer comprises only a cellulose acetate resin or cellulose alkylate resin as a resin component,
• wherein a three-dimensional structure with a height of 0.001 mm to 2.0 mm is formed along a vertical direction to the longitudinal direction when the substrate contacts 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, and
• wherein the substrate layer has a strain of at least 10% in a longitudinal direction according to the following Equation 1:
• Strain in Longitudinal direction=(L2−L1)/L1×100, [Equation 1]
• 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.