Abstract: Multi-layer bag for bulk material, comprising at least one layer of material comprising paper or paper-like material, wherein two layers of material are formed by pieces of tube (22, 32) inserted telescopically in one another, wherein a first of the pieces of tube (22) inserted telescopically in one another has at one end (27) an overhang (U1) with respect to a second of the pieces of tube (32) inserted telescopically in one another.

Abstract: A valve sack for bulk material such as cement, gypsum, pellets, animal feed, or similar having a stand-up base, preferably a cross-base or a block base, and having a valve base that is disposed opposite the stand-up base and into which a valve hose is worked that forms a valve for filling the valve sack in the region of a first corner fold of the base fold, characterized in that the valve hose is formed from a thermal material and from a material different therefrom, with both materials being weldable or sealable with one another to close the valve.

Abstract: A paper sack for bulk material such as cement, gypsum, granulate, animal feed or similar, having a base, preferably a cross bottom or block bottom, and having an upper part which is disposed opposite the base and in which a valve tube is optionally arranged for filling the paper sack, wherein the paper sack has at least one paper layer having an overlap which is sealingly adhesively bonded toward the sack interior; and wherein the layer of the paper layer facing the sack interior has an air-permeable region in the region of the overlap which is covered by the layer of the paper layer facing the sack exterior. The at least one paper layer at least regionally has a water-repellent/water-tight coating facing the sack exterior.

Abstract: The present invention relates to a paper sack for bulk material such as cement, gypsum, granulate, animal feed or similar, having a base, preferably a cross bottom or block bottom, and having an upper part which is disposed opposite the base and in which a valve hose is optionally arranged for filling the paper sack, wherein the paper sack has a coated paper layer, having a gas-tight coating facing the sack interior, wherein the coating forms the surface of the inner wall of the paper sack contacting the filling material, and wherein the coated paper layer has an overlap which is sealingly adhesively bonded toward the sack interior, and wherein the layer of the coated paper layer facing the sack interior has perforations in the region of the overlap which are covered by the layer of the coated paper layer facing the sack exterior.

Abstract: The present invention relates to a valve bag for bulk material such as cement, gypsum, granulate, animal feed or similar, having a standing bottom, preferably a cross bottom or a block bottom, and having a valve bottom which is disposed opposite the standing bottom and into which a valve hose is inserted for filling the valve bag, wherein the valve hose is formed from a thermo material and a carrier material enveloping the thermo material, wherein the area proportion of the thermo material is smaller than the area proportion of the carrier material.

Abstract: A paper sack for bulk material such as cement, gypsum, granulate, animal feed or similar, having a base, preferably a cross bottom or block bottom, and having an upper part which is disposed opposite the base and in which a valve tube is optionally arranged for filling the paper sack, wherein the paper sack has at least one paper layer having an overlap which is sealingly adhesively bonded toward the sack interior; and wherein the layer of the paper layer facing the sack interior has an air-permeable region in the region of the overlap which is covered by the layer of the paper layer facing the sack exterior. The at least one paper layer at least regionally has a water-repellent/water-tight coating facing the sack exterior.

Abstract: The invention relates to a paper bag for packaging of bulk material, having a standing bottom (2) and a valve bottom (3), a front wall (4) and a rear wall, the front wall and the rear wall being glued to each other in overlapping relationship, the paper bag further comprising cover sheets (5, 5?) for closing the standing bottom (2) and the valve bottom (3), wherein the cover sheet (5) of the standing bottom (2) and/or of the valve bottom (3) is provided with a tear open strip (6) which extends across the entire length of the bottom. It is characterized in that a foil (9) is placed below the standing bottom cover sheet (5) and/or below the valve bottom cover sheet (5?) and is removably glued to the paper bag (1) in such a manner that after tearing open of the standing bottom cover sheet (5) and/or of the valve bottom cover sheet (5?) the foil (9) still closes the paper bag (1) completely and sets the product free only after peeling off said foil.

Abstract: The present invention relates to a paper sack for bulk material such as cement, gypsum, granulate, animal feed or similar, having a base, preferably a cross bottom or block bottom, and having an upper part which is disposed opposite the base and in which a valve hose is optionally arranged for filling the paper sack, wherein the paper sack has a coated paper layer, having a gas-tight coating facing the sack interior, wherein the coating forms the surface of the inner wall of the paper sack contacting the filling material, and wherein the coated paper layer has an overlap which is sealingly adhesively bonded toward the sack interior, and wherein the layer of the coated paper layer facing the sack interior has perforations in the region of the overlap which are covered by the layer of the coated paper layer facing the sack exterior.

Abstract: The disclosure relates to a paper bag for packaging of bulk material, having a standing bottom (2) and a valve bottom (3), a front wall (4) and a rear wall, the front wall and the rear wall being glued to each other in overlapping relationship, the paper bag further comprising cover sheets (5, 5?) for closing the standing bottom (2) and the valve bottom (3), wherein the cover sheet (5) of the standing bottom (2) and/or of the valve bottom (3) is provided with a tear-open strip (6) which extends across the entire length of the bottom. A foil (9) is placed below the standing bottom cover sheet (5) and/or below the valve bottom cover sheet (5?) and is removably glued to the paper bag (1) in such a manner that after tearing open of the standing bottom cover sheet (5) and/or of the valve bottom cover sheet (5?) the foil (9) still closes the paper bag (1) completely and sets the product free only after peeling off said foil.