Paper straw

Abstract

In order to solve the disadvantages of plastic straws in terms of environmental pollution, and the inconvenience of the above-described paste-adhered paper straws, provided is a paper straw comprising: an inner paper portion in which a single strip of paper without a heat-adhesive coating material on the inside surface thereof is spirally wound so as to form a single layer, and an outer paper portion which comprises at least one paper strip forming at least one layer around the outer peripheral surface of the inner paper portion while being wound in a spiral, and which is provided with the heat-adhesive coating material on the outside surface of the paper strip forming the outermost layer, wherein the paper strip of the outer paper portion has a wider width than the paper strip of the inner paper portion, the heat-adhesive coating material is provided between two paper strips of adjacent different layers, and the heat-adhesive coating material has adhesive strength or water resistance according to heating and curing.

Dependencies are inferred from the claim text.