Swelling tape for filling gap
View Patent ↗A swelling tape for filling a gap and a method of filling a gap are provided. The swelling tape can be applied within the gap having a fluid to realize a 3D shape thereby filling the gap, and be used to fix a subject forming the gap as necessary.
1. A swelling tape for filling a gap, comprising:
a substrate layer, deforming in a longitudinal direction of the substrate layer when the substrate layer comes in contact with an electrolyte, wherein the substrate layer includes a urethane bond, an ester bond, or an ether bond, and wherein the substrate layer includes an acrylate-based substrate layer, a urethane-based substrate layer, or an epoxy-based substrate layer; and
a pressure-sensitive adhesive layer formed on one surface of the substrate layer in a horizontal direction to the longitudinal direction of the substrate layer,
wherein the substrate layer has a strain of 10% or more in the longitudinal direction according to the following Equation 1, and
wherein the pressure-sensitive adhesive layer has a peel strength of 100 gf/25 mm or more, which is measured at room temperature at a peel rate 5 mm/sec and a peel angle of 180° with respect to one glass plate:
Strain in Longitudinal direction=( L 2 −L 1 )/ L 1 ×100 [Equation 1]
(wherein L 1 is an initial length of the substrate layer before the substrate layer comes in contact with the electrolyte; and
L 2 is a length of the substrate layer, which is measured after the substrate layer comes in contact with the electrolyte at room temperature or 60° C. for 24 hours).
2. The swelling tape of claim 1 , wherein the swelling tape forms a three-dimensional (3D) structure with a height of 0.001 mm to 2.00 mm in a vertical direction to the longitudinal direction of the substrate layer when the substrate layer comes in contact with the electrolyte.
3. The swelling tape of claim 1 , wherein the pressure-sensitive adhesive layer includes an acrylic pressure-sensitive adhesive, a urethane pressure-sensitive adhesive, an epoxy pressure-sensitive adhesive, a silicon pressure-sensitive adhesive, or a rubber pressure-sensitive adhesive.
4. The swelling tape of claim 1 , wherein the pressure-sensitive adhesive layer includes an acryl polymer, which is crosslinked with a multifunctional crosslinking agent.
5. A method of filling a gap, which is formed by a first substrate and a second substrate spaced apart from the first substrate, comprising:
attaching the pressure-sensitive adhesive layer of the swelling tape according to claim 1 to the first substrate or the second substrate; and
deforming the substrate layer in a longitudinal direction by bringing the substrate layer of the swelling tape in contact with the electrolyte.
6. The method of claim 5 , wherein a width of the gap formed by the first substrate and the second substrate is 0.001 mm to 2.00 mm.
7. The method of claim 5 , wherein one of the first and second substrates is an electrode assembly and the other is a can receiving the assembly.