Classifications

• • B—PERFORMING OPERATIONS; TRANSPORTING
  • B65—CONVEYING; PACKING; STORING; HANDLING THIN OR FILAMENTARY MATERIAL
  • B65D—CONTAINERS FOR STORAGE OR TRANSPORT OF ARTICLES OR MATERIALS, e.g. BAGS, BARRELS, BOTTLES, BOXES, CANS, CARTONS, CRATES, DRUMS, JARS, TANKS, HOPPERS, FORWARDING CONTAINERS; ACCESSORIES, CLOSURES, OR FITTINGS THEREFOR; PACKAGING ELEMENTS; PACKAGES
  • B65D88/00—Large containers
  • B65D88/16—Large containers flexible
  • B65D88/1612—Flexible intermediate bulk containers [FIBC]
  • B65D88/1618—Flexible intermediate bulk containers [FIBC] double-walled or with linings
• • B—PERFORMING OPERATIONS; TRANSPORTING
  • B65—CONVEYING; PACKING; STORING; HANDLING THIN OR FILAMENTARY MATERIAL
  • B65D—CONTAINERS FOR STORAGE OR TRANSPORT OF ARTICLES OR MATERIALS, e.g. BAGS, BARRELS, BOTTLES, BOXES, CANS, CARTONS, CRATES, DRUMS, JARS, TANKS, HOPPERS, FORWARDING CONTAINERS; ACCESSORIES, CLOSURES, OR FITTINGS THEREFOR; PACKAGING ELEMENTS; PACKAGES
  • B65D85/00—Containers, packaging elements or packages, specially adapted for particular articles or materials
  • B65D85/70—Containers, packaging elements or packages, specially adapted for particular articles or materials for materials not otherwise provided for
• • B—PERFORMING OPERATIONS; TRANSPORTING
  • B65—CONVEYING; PACKING; STORING; HANDLING THIN OR FILAMENTARY MATERIAL
  • B65D—CONTAINERS FOR STORAGE OR TRANSPORT OF ARTICLES OR MATERIALS, e.g. BAGS, BARRELS, BOTTLES, BOXES, CANS, CARTONS, CRATES, DRUMS, JARS, TANKS, HOPPERS, FORWARDING CONTAINERS; ACCESSORIES, CLOSURES, OR FITTINGS THEREFOR; PACKAGING ELEMENTS; PACKAGES
  • B65D88/00—Large containers
  • B65D88/16—Large containers flexible
  • B65D88/1612—Flexible intermediate bulk containers [FIBC]
  • B65D88/1631—Flexible intermediate bulk containers [FIBC] with shape keeping flexible elements
• • B—PERFORMING OPERATIONS; TRANSPORTING
  • B65—CONVEYING; PACKING; STORING; HANDLING THIN OR FILAMENTARY MATERIAL
  • B65D—CONTAINERS FOR STORAGE OR TRANSPORT OF ARTICLES OR MATERIALS, e.g. BAGS, BARRELS, BOTTLES, BOXES, CANS, CARTONS, CRATES, DRUMS, JARS, TANKS, HOPPERS, FORWARDING CONTAINERS; ACCESSORIES, CLOSURES, OR FITTINGS THEREFOR; PACKAGING ELEMENTS; PACKAGES
  • B65D88/00—Large containers
  • B65D88/16—Large containers flexible
  • B65D88/1612—Flexible intermediate bulk containers [FIBC]
  • B65D88/1675—Lifting fittings
  • B65D88/1681—Flexible, e.g. loops, or reinforcements therefor

Definitions

• the invention refers to a large-volume packing container for bitumen, the container being made of flexible material and comprising trapezoidal fabric panels forming the lateral walls, adjoining fabric panels being connected to each other in connecting regions extending along their edges so as to form an approximately truncated pyramid-like basic shape prior to filling, wherein the container is closed at the top by a cover wall extending parallel to the bottom wall and having a preferably central filling opening, wherein stabilizing means (14) are arranged in the lower region of the fabric panels forming the lateral walls (1,2,3,4) in order to stabilize the woven fabric to forces occurring obliquely to the warp and weft.
• bitumen as charge is more difficult to handle insofar as it is a melt, which is liquid to viscous at higher temperatures and sets at lower temperatures. Solidified melts have the property, that even at low temperatures they are not completely rigid. Although bitumen exhibits strong cohesion at ambient temperature, it has a very low internal friction, such that it behaves as a very slow running mass when cooled. If bitumen is filled in a container that is not dimensionally stable, the bitumen dodges during transport or storage due to the plastic flow (slow flow) , which complicates stacking of such containers or makes it impossible.
• the packing container disclosed in WO 2009/043071 Al comprises lateral walls made of a woven fabric, which in the temperature range from 100° to 110°C has a stretching capacity of 10 - 25%, preferably 15 - 20%, in the direction of the warp and weft, wherein stabilizing means, such as pleats, seams, strips or the like are drawn or sewn into the lower region of the fabric panels forming the lateral walls in order to stabilize the woven fabric to forces occurring obliquely to the warp and weft.
• stabilizing means such as pleats, seams, strips or the like are drawn or sewn into the lower region of the fabric panels forming the lateral walls in order to stabilize the woven fabric to forces occurring obliquely to the warp and weft.
• the fabric forming the walls can stretch within predetermined limits due to the temperature of the filled bitumen, which leads to a certain bulging of the container. So that the bulge is not too prominent and as well so that no sideways creeping of the container takes place the stabilizing means are inserted in the fabric panels forming the lateral walls.
• the stability or the prevention of unguided bulging of the container is insofar important, as such containers are loaded in so- called "ISO-Container".
• ISO-Container are internationally also called “TEU”, which stands for "Twenty Feet Equivalent Unit”. In these freight containers two packing containers are each put on the floor next to each other and subsequently two further containers are stacked on top of these two packing containers.
• the object of the invention is to create a large-volume packing container of the initially mentioned kind, which is self-stabilizing during filling of the bitumen and even when the bitumen stiffened, under stress from above, stands freely. It is also an object of the invention to create a large-volume packing container that substantially maintains its shape even after having been filled with bitumen. Further, it is an object of the invention to prevent ripping of the material of the lateral walls or of the stabilizing means due to shearing forces. Further, it is an object of the invention to enhance the security in handling the packing container.
• the stabilizing means comprise webbings extending obliquely to the warp and weft, the webbings being connected to the fabric panels forming the lateral walls only in said connecting regions.
• Webbing is a strong fabric woven as a flat strip or tube of varying width and fibers often used in place of rope. Modern webbing is often made from exceptionally high-strength material, such as nylon, polyester, Kevlar, cotton, polypropylene or flax. Within the scope of the invention polypropylene is preferred.
• the webbing is woven from monoaxially drawn polyolefin, preferably polypropylene, tapes. Generally, webbing is both light and strong, with high breaking strengths available.
• the webbing used according to this invention preferably has a width of approximately 3-6 cm, more preferably approximately 4 cm.
• the webbings extend from one side edge of the fabric panels forming the lateral walls to the opposite side edge thereof and according to the invention are connected to the fabric panels forming the lateral walls only in said connecting regions extending along the wall edges. Because the webbings are connected to the lateral walls only at said connecting regions, i.e. at the edges of the container where two adjoining lateral walls are connected to each other, the webbings are loosely contacting the lateral walls over their entire length between the connecting regions so that no shearing forces can occur. Thus, the stabilizing effect of the webbings is enhanced. In particular, the stabilizing effect of the webbings is not in any way inhibited by any shearing forces or by the risk of ripping.
• two webbings crossing each other are arranged at each lateral wall, the two webbings crossing each other preferably form an "X". In this way, the stabilizing effect is further enhanced and bulging of the container is effectively limited.
• the webbings are connected to the edges of the fabric panels by sewing. This guarantees a particularly stable connection that can withstand high loads and high temperatures.
• the container is preferably devised such that adjoining fabric panels are connected to each other along their overlapping edges by a seam, which seam also serves to connect the webbings to the fabric panels.
• a single seam holds two adjoining woven fabric panels together and connects the webbings to the edge of the panels.
• the webbings preferably have a breaking strength in longitudinal direction of at least 1000 kg, preferably at least 1300 kg.
• the webbings are provided in the lower half, preferably lower third, of the height of the container. Due to this measure a bulging can be prevented in a particularly effective way, as the stabilizing means are mounted in just the region of the greatest bulging.
• the woven fabric forming the walls (1, 2, 3, 4, 5, 6) has a stretching capacity of 10 - 25%, preferably 15 - 20%, in the direction of the warp and weft.
• a separate inner container of a plastic stable to approximately 100 - 105°C with a melting point of approximately 130 - 150 °C is used.
• the inner container is due to its melting point meltable during the processing of the bitumen, whereby due to the small amount of material of the inner container in relation to the overall mass of the bitumen contained in the container no changes in the bitumen quality are to be expected.
• the woven fabric used for the walls, in particular the lateral walls, of the packing container preferably is a fabric of monoaxially drawn polyolefin, preferably polypropylene, tapes. These tapes are produced by stretching polyolefin sheets to four to ten times their original length, whereby the molecule chains in the tapes' longitudinal direction are oriented and thus have a strength in this direction which is about 6 to 10 times higher compared to the original sheet.
• the tape width is usually about 1.5 to 10 mm and the thickness 20-80 pm. Transverse strains cleave the tapes, which is why they are woven into flat fabric made of weft and warp layers about perpendicular to each other. The fabric then has uniformly high tensile strength in all directions.
• a melt coating which preferably consists or the same material as the tapes, can be applied to, and pressed into, the material on one or both sides thereof.
• the fabric, in particular the polypropylene fabric, forming the walls can further be stabilized by a coating, in particular a polypropylene coating, wherewith both the stretching ability and the deformation due to forces occurring obliquely to the warp and weft can be prevented in a particularly effective manner.
• the container is preferably devised such that the fabric forming the lateral walls is designed as a double layer woven fabric.
• the inner layer of the double layer woven fabric serves as a security layer in case the outer layer gets damaged due to a possible mishandling of the container.
• the inner layer is a further means to maintain the shape of the filled container.
• the outer layer of the double layer woven fabric is configured as a sandwich type fabric comprising two layers of woven polypropylene fabric connected to each other by an intermediate layer of a polypropylene film.
• the intermediate layer is preferably devised as a lamination and sticks the two layers of the sandwich type fabric together. Due to the intermediate layer the fabric is resistant to rain. Further, the intermediate layer can have ultra-violet radiation protective properties.
• the outer layer of the sandwich type fabric has a higher density than the inner layer of the sandwich type fabric.
• the outer layer of the sandwich type fabric can have a density of at least 100 gr/m 2 , preferably 130 - 140 gr/m 2
• the inner layer of the sandwich type fabric can have a density of 50 - 100 gr/m 2 , preferably 65 - 85 gr/m 2 .
• the lower density of the inner layer results in a reduction of the production costs and prevents that the container gets too stiff while still adding to the stability of the container.
• the webbings are arranged between the outer layer and the inner layer of the double layer fabric. In this way, the webbings are protected from external impacts and other harmful influences.
• Fig. 1 shows a depiction of the container.
• Fig. 2 is a section according to line II-II.
• Fig. 3 is a section of the lateral wall according to line III-III .
• the container consists of a truncated cone formed by four trapezoidal lateral walls 1, 2, 3, 4, a floor 5 and a top surface 6, whereby the lateral walls 1, 2, 3, 4 are connected to each other by seams extending along the edges of the later walls in the connecting regions 7, the bottom edge of the lateral walls to the floor by seams 8 and the upper edge of the lateral walls with the top surface 6 by seams 9.
• the top surface 6 has a filling opening 10, through which the internal lining 11 protrudes, which is closable by a strip 11' or similar.
• the inclination of the lateral walls to the floor is, as indicated for angle a, between 70° and 85°, preferably between 75° and 83°.
• angle a between 70° and 85°, preferably between 75° and 83°.
• the stabilizing webbings 14 are arranged in the lower half in the lateral walls 1-4. Two webbings 14 crossing each other are arranged at each lateral wall 1-4. These stabilizing means form an "X" and run aslant from one edge of the walls, in particular from the corner area of the walls 1-4, upwards to the opposite edge.
• the end portions of the webbings 14 are attached to the walls 1-4 at the connecting regions 7.
• the end portions of the webbings 14 are co-sewn with the seams connecting two adjoining lateral walls 1-4.
• the middle portion of the webbings i.e. the portion extending between the end portions that are connected to the later walls, is not connected to the later wall at all.
• the straps 13 co-sewed along the side edges are formed as loop handles 13', wherein two loop handles running roughly parallel to each other are provided, and wherein the loop handles 13' can serve not only for the lifting via a forklift but as well for the fixation of the container inside of a standard container.
• Fig.2 it is indicated, how the separate inner container 11 is introduced in the container, whereby it is essential that the inner container at least in the region of the seams 8 is connected with the walls of the container to prevent that an inwards folding or other deformation of the inner container results, which prevents that the container can be fully filled.
• the walls consists of a double layer woven fabric, the outer layer of which is designated by 15 and the inner layer of which is designated by 19.
• the outer layer 15 is made of a sandwich type fabric formed comprising an outer layer 16 and an inner layer 17 connected to each other by an intermediate film 18.
• the inner layer 19 of the double layer woven fabric carries a coating 20 made of a polypropylene film.
• the webbings 14 are arranged between the two layers of the double layer woven fabric, i.e. between the sandwich type layer 15 and the inner layer 19.
• the present container is designed for liquid or viscous or creepable charges like bitumen, whereby it has been discovered, that due to the design the container has a high degree of self stabilizations.

Landscapes

• Engineering & Computer Science (AREA)
• Mechanical Engineering (AREA)
• Bag Frames (AREA)
• Wrappers (AREA)

Applications Claiming Priority (1)

Publications (1)

Family

ID=43466367

Family Applications (1)

Country Status (2)

Cited By (1)

Families Citing this family (3)

Family Cites Families (7)

• 2010
  • 2010-06-01 EP EP10729938.0A patent/EP2576395A1/de not_active Withdrawn
  • 2010-06-01 WO PCT/IB2010/001309 patent/WO2011151661A1/en active Application Filing

Non-Patent Citations (1)

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