# US 12,179,456 B2 · Paper straw > Agents: this data is available as JSON from the patentgrep API and MCP server — see https://patentgrep.com/llms.txt - Number: US 12,179,456 B2 - Document ID: US12179456B2 - Status: Granted - Kind: B2 - Application number: 17/616,259 - Filed: 2020-06-04 - Published: 2022-10-13 - Granted: 2024-12-31 - Earliest claimed: 2019-06-07 - Assignees: Lee &B Inc. - Applicants: Lee & B Inc. - Inventors: Heon Kug Lee - Web page: https://patentgrep.com/patent/US12179456B2 ## CPC - B31D 5/0095: {Making drinking straws} - A47G 21/18: Drinking straws or the like ({as integral parts of drinking containers A47G19/2266;} for therapeutic purposes A61J15/00 {; adapted to emerge from drinking containers when opened B65D77/283}) - B31C 3/00: Making tubes or pipes by feeding obliquely to the winding mandrel centre line - C09J 5/06: involving heating of the applied adhesive - C09J 133/08: Homopolymers or copolymers of acrylic acid esters - D21H 11/04: Kraft or sulfate pulp - D21H 27/30: Multi-ply (for surface covering D21H27/18; making on paper-making machines D21F9/00, D21F11/00) - D21H 27/32: with materials applied between the sheets (attaching together paper or cardboard sheets B31F5/00; adhesives C09J) - B31D: MAKING ARTICLES OF PAPER, CARDBOARD OR MATERIAL WORKED IN A MANNER ANALOGOUS TO PAPER, NOT PROVIDED FOR IN SUBCLASSES B31B OR B31C (manufacture by dry processes of articles made from particles or fibres consisting of wood or other lignocellulosic or like organic material B27N; making layered products not composed wholly of paper or cardboard B32B; making articles from cellulosic fibrous suspensions, e.g. wood pulp, D21J) - A47G: HOUSEHOLD OR TABLE EQUIPMENT (book-ends A47B5/00; knives B26B) - B31C: MAKING WOUND ARTICLES, e.g. WOUND TUBES, OF PAPER, CARDBOARD OR MATERIAL WORKED IN A MANNER ANALOGOUS TO PAPER - C09J: ADHESIVES; NON-MECHANICAL ASPECTS OF ADHESIVE PROCESSES IN GENERAL; ADHESIVE PROCESSES NOT PROVIDED FOR ELSEWHERE; USE OF MATERIALS AS ADHESIVES (preparation of glue or gelatine C09H) - D21H: PULP COMPOSITIONS; PREPARATION THEREOF NOT COVERED BY SUBCLASSES D21C OR D21D; IMPREGNATING OR COATING OF PAPER; TREATMENT OF FINISHED PAPER NOT COVERED BY CLASS B31 OR SUBCLASS D21G; PAPER NOT OTHERWISE PROVIDED FOR ## 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. ## Claims ### Claim 1 A paper straw comprising: an inner paper part comprising a single paper strip that does not have a thermal adhesive coating material on an inner surface and is spirally wound to form one layer; and an outer paper part comprising at least one paper strip forming at least one layer by wrapping an outer peripheral surface of the inner paper part while spirally wound, an outer surface of the paper strip forming an outermost layer being provided with a thermal adhesive coating material, wherein the paper strip of the outer paper part has a wider width than the paper strip of the inner paper part, a thermal adhesive coating material is provided between two paper strips of adjacent different layers, and the thermal adhesive coating materials have adhesion or water resistance by heating and curing. ### Claim 2 (depends on 1) The paper straw of claim 1, wherein the thermal adhesive coating material provided on the outer surface of the paper strip forming the outermost layer and the thermal adhesive coating material provided between the two paper strips of the adjacent different layers are composed of a same ingredient. ### Claim 3 (depends on 1) The paper straw of claim 1, wherein the thermal adhesive coating materials comprise an acrylate-based heat-sealable material. ### Claim 4 (depends on 1) The paper straw of claim 1, wherein the thermal adhesive coating material provided on the outer surface of the paper strip forming the outermost layer has water resistance by heating and curing, and the thermal adhesive coating material provided between the two paper strips of the adjacent different layers has adhesion and water resistance by heating and curing. ### Claim 5 (depends on 1) The paper straw of claim 1, wherein a width of each of the paper strips is 10 mm to 30 mm. ### Claim 6 (depends on 1) The paper straw of claim 1, wherein the paper strip corresponding to the inner paper part does not overlap while spirally wound, and each paper strip corresponding to the outer paper part overlaps while spirally wound. ### Claim 7 (depends on 6) The paper straw of claim 6, wherein a thermal adhesive coating material is provided in the overlapping region of the outer paper part. ### Claim 8 (depends on 1) The paper straw of claim 1, wherein each of the paper strips is provided by a mass per unit area of 40 gsm to 120 gsm. ### Claim 9 (depends on 8) The paper straw of claim 8, wherein a ratio of mass per unit area of the paper strip forming the outermost layer of the outer paper part with respect to the paper strip of the inner paper part is 0.5 to 0.8. ### Claim 10 (depends on 1) The paper straw of claim 1, wherein a mass per unit area of the thermal adhesive coating material provided on one surface of any one of the paper strips is 1 gsm to 15 gsm. ### Claim 11 (depends on 10) The paper straw of claim 10, wherein the thermal adhesive coating material is provided with an amount of 1 gsm to 3 gsm on the outer surface of the paper strip forming the outermost layer, and the thermal adhesive coating material is provided with an amount of 10 gsm to 20 gsm between the two paper strips of the adjacent different layers. ### Claim 12 (depends on 11) The paper straw of claim 11, wherein the paper strips are kraft papers, and the thermal adhesive coating material is provided with an amount of 14 gsm to 20 gsm between the two paper strips of the adjacent different layers. ### Claim 13 (depends on 10) The paper straw of claim 10, wherein a ratio of mass per unit area of the thermal adhesive coating material provided on the outer surface of the paper strip forming the outermost layer with respect to the thermal adhesive coating material provided between the two paper strips of the adjacent different layers is 0.1 to 0.6. ### Claim 14 (depends on 1) The paper straw of claim 1, wherein the inner paper part forms an inner paper layer, and two paper strips of the outer paper part are spirally wound to form a middle paper layer and an outer paper layer, respectively. ### Claim 15 (depends on 14) The paper straw of claim 14, wherein both surfaces of the middle paper layer and both surfaces of the outer paper layer are provided with thermal adhesive coating materials. ### Claim 16 (depends on 14) The paper straw of claim 14, wherein a width of the paper strip of the outer paper layer is larger than a width of the paper strip of the middle paper layer. ### Claim 17 (depends on 16) The paper straw of claim 16, wherein a width of the paper strip of the inner paper layer is 13.5 mm, the width of the paper strip of the middle paper layer is 14 mm, and the width of the paper strip of the outer paper layer is 15 mm.