초록

A disposable piping bag (1) comprises a container of polymer film. The piping bag is formed essentially from a thin-walled polymer tube, and an outwardly oriented surface of the piping bag has a rough surface structure.

대표청구항 ▼

The invention claimed is: 1. A disposable piping bag, comprising: a container of polymer film formed from a thin-walled polymer tube; an outwardly oriented surface of the container provided with a rough surface structure, wherein the outwardly oriented surface includes at least one grip-enhancing a

The invention claimed is: 1. A disposable piping bag, comprising: a container of polymer film formed from a thin-walled polymer tube; an outwardly oriented surface of the container provided with a rough surface structure, wherein the outwardly oriented surface includes at least one grip-enhancing agent and at least one friction-enhancing agent being a viscous high-molecular liquid, the at least one grip-enhancing agent having a higher density and melting point than a material of the polymer film. 2. A piping bag according to claim 1, wherein the rough surface structure is formed by at least one of a) adding grains or flakes to the material of which the thin-walled polymer tube is made, b) pattern-rolling the polymer tube, and c) applying a lacquer to the outwardly oriented surface combined with adding grains or flakes to the lacquer. 3. A piping bag according to claim 1, wherein the thin-walled polymer tube is made of a plastic film. 4. A piping bag according to claim 3, wherein said plastic film is a polyolefin plastic. 5. A piping bag according to claim 1, wherein the thin-walled polymer tube is essentially transparent. 6. A piping bag according to claim 1, wherein a wall of said thin-walled polymer tube includes at least two laminated material layers, including an outer material layer of which provides the rough surface structure. 7. A piping bag according to claim 6, wherein the rough surface structure is formed by at least one of: c) at least partly expanding the outer material layer, d) at least partly starve-feeding the outer material layer, and e) at least partly cold-feeding the outer material layer. 8. A piping bag according to claim 1, wherein the thin-walled polymer tube has a severance mark that is transversal to the longitudinal direction of the tube. 9. A piping bag according to claim 8, wherein the thin-walled tube has a joint that is parallel to the severance mark. 10. A piping bag according to claim 9, wherein said joint is a welding joint. 11. A piping bag according to claim 1, wherein the piping bag has an open end, the open end of the piping bag being provided with a weaker welding joint, which is such that the piping bag remains closed until it is deliberately opened by a user. 12. A blank for manufacturing at least two disposable piping bags, each including a container of polymer film, the blank comprising: an elongated thin-walled polymer tube, the piping bags being detachable from one another by means of severance mark; and an outwardly oriented surface of the blank provided with a rough surface structure, wherein the outwardly oriented surface includes at least one grip-enhancing agent and at least one friction-enhancing agent being a viscous high-molecular liquid, the at least one grip-enhancing agent having a higher density and melting point than a material of the polymer film. 13. A method of manufacturing a disposable piping bag including a container of polymer film, the method comprising: making the piping bag from a thin-walled polymer tube, and providing an outwardly oriented surface of the piping bag with a rough surface structure, wherein the outwardly oriented surface includes at least one grip-enhancing agent and at least one friction-enhancing agent being a viscous high-molecular liquid, the at least one grip-enhancing agent having a higher density and melting point than a material of the polymer film. 14. A method according to claim 13, in which providing the outwardly oriented surface with a rough surface structure comprises at least one of: adding grains or flakes to the material of which the thin-walled polymer tube is made, and pattern-rolling the thin-walled polymer tube. 15. A method according to claim 13, further comprising forming the thin-walled polymer tube by laminating at least two material layers, including an outer material layer with the rough surface structure. 16. A method according to claim 15, in which providing the outwardly oriented surface with a rough surface structure comprises at least one of: at least partly expanding the material of which an outer layer of the thin-walled polymer tube is made, at least partly starve-feeding the material of which an outer layer of the thin-walled polymer tube is made, and at least partly cold-feeding the material of which an outer layer of the thin-walled polymer tube is made. 17. A method according to claim 13, further comprising providing an open end of the piping bag wherein the open end of the piping bag is provided with a weaker welding joint, which is such that the piping bag remains closed until it is deliberately opened by a user.