EP1268312B1 - A flexible tank for liquids and method of making such a tank - Google Patents
A flexible tank for liquids and method of making such a tank Download PDFInfo
- Publication number
- EP1268312B1 EP1268312B1 EP01914124A EP01914124A EP1268312B1 EP 1268312 B1 EP1268312 B1 EP 1268312B1 EP 01914124 A EP01914124 A EP 01914124A EP 01914124 A EP01914124 A EP 01914124A EP 1268312 B1 EP1268312 B1 EP 1268312B1
- Authority
- EP
- European Patent Office
- Prior art keywords
- body portion
- flexible tank
- tank
- flexible
- liner
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Revoked
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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
- B65D90/00—Component parts, details or accessories for large containers
- B65D90/02—Wall construction
- B65D90/04—Linings
- B65D90/046—Flexible liners, e.g. loosely positioned in the container
-
- 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
- B65D2590/00—Component parts, details or accessories for large containers
- B65D2590/02—Wall construction
- B65D2590/04—Linings
- B65D2590/043—Flexible liners
- B65D2590/046—Bladders
Definitions
- the present invention relates to a flexible tank for bulk liquids and a method of making such a tank.
- the invention relates to a disposable flexible tank.
- Flexible tanks are bulk containers that are used for storing and transporting fluids. These tanks can be constructed from a variety of rubber or thermoplastic materials and typically have capacities of up to 24,000 litres. In use flexitanks are used inside dry goods containers, thereby converting such containers into bulk liquid containers capable of carrying up to 21.5 tonnes of non-hazardous liquid product.
- One known flexitank is made from a woven nylon or polyester fabric coated on both sides with synthetic rubber or thermoplastic material. The coating is done using a process called calendering.
- This is a re-usable tank, with a life span of, typically, five years.
- a disadvantage of this tank is that it requires re-cleaning after every use, which can cause contamination and environmental concerns.
- a large infra-structure is required to operate, handle, clean, service and return the tank. This means that there is a high capital cost associated with the running of the business.
- tanks of this type are subject to quality problems.
- GB-A-2 333 765 discloses a flexible bulk container for non-liquid products made by a blown seamless tube, the ends being reshaped to form or parallel-epiped with multiple seams.
- An object of the present invention is to provide an improved flexitank, in particular an improved disposable flexitank.
- a flexible tank that comprises a one piece body portion that is formed using blowing techniques.
- An advantage of this is that it minimises the number of seams required to form the tank. This means in practice that the tank is less susceptible to leakages. Another advantage is that the interior of the tank is never touched by human hands nor is it exposed to the atmosphere or dirt or bacteria. This means that the tank can easily conform with the highest of hygiene standards.
- the one piece body portion is a seamless tube.
- the ends of the tube may be closed by, for example, welding.
- two one piece body portions are provided, one forming an inner liner and the other forming an outer liner.
- the one piece body portion may be made of polyethylene, preferably a blend of resin and bonding agent.
- the ratio of the resin to bonding agent may be 75% to 25%.
- the resin is Elite (Metallocene) 5100 resin (C6 Linear low density polyethylene (LLDPE)) made by Dow Chemicals.
- the bonding agent may be a co-polymer, preferably ethylene butyl acrylate (EBA).
- the or each body portion may comprise two or more layers, for example three or four.
- the body portion is co-extruded.
- the body portion comprises two layers.
- the two layers may be of different polyethylene, one being, for example, a high density polyethylene, the other being a low density polyethylene.
- the body portion may be triple co-extruded, each co-extruded layer fulfilling a different function.
- the co-extruded layers may be Metallocene, EVA (ethylene vinyl acetate) and linear low density PE Octen (linear low density polyethylene).
- a method of forming a flexible tank using blown film techniques to form a one-piece seamless body portion there is provided a method of forming a flexible tank using blown film techniques to form a one-piece seamless body portion.
- the one-piece seamless body portion is a tube.
- the ends of the tube are preferably closed by, for example, welding.
- the step of blowing the tube comprises co-extruding at least two layers of material to form the body portion.
- two one piece body portions are provided, one being an inner liner and the other being an outer liner.
- the one piece body portion may be made of material that comprises a blend of resin and bonding agent.
- the ratio of the resin to bonding agent is 75% to 25%.
- the resin is Elite (Metallocene) 5100 resin (C6 LLDPE) made by Dow Chemicals.
- the bonding agent may be a co-polymer, preferably EBA.
- FIG. 1 shows a seamless, open-ended, one piece tube of material 10.
- This seamless tube 10 is formed using a blown film technique, which involves liquifying constituent materials, extruding them through a die and blowing them into a large bubble.
- the material liquified is a 75%:25% mix of Elite (Metallocene) 5100 resin (C6 LLDPE) made by Dow Chemicals and co-polymer EBA.
- the bubble formed is about 7m by 4m, typically 7.3m by 4.04m.
- the thickness of the material of the bubble is typically 225 micrometers, but may be as much as 250 micrometers.
- the bubble is cut to form a seamless tube.
- the seamless tube 10 is used as an inner liner 10 for a flexitank.
- Two holes are formed through the liner 10, as shown in Figure 2.
- Surrounding one hole is a male flange 12; surrounding the other hole is a female flange 14.
- seams 16 are formed, typically, 50mm from the edges of the tube 10. These seams 16 are welded.
- the inner liner 10 is placed inside a similar, but larger outer liner 18, as shown in Figure 3.
- a collar 20 is welded to the male flange 12 on the inner liner 10 and the outer liner 18, as shown in Figure 4. This collar 20 extends through the outer liner 18 and is adapted to receive the end of a hose for filling and emptying the tank.
- a pressure relief valve (not shown) for ensuring that the internal pressure of the tank does not exceed a pre-set level.
- FIG. 6 shows a 7470mm by 3950mm sealed inner liner 10 inside a 7670mm by 4850mm sealed outer liner 18.
- the ends of the inner liner 10 are not sealed separately prior to insertion into the outer liner 18, but instead the ends of the inner and outer liners 10 and 18 are sealed together at one position, as shown in Figure 7.
- a tank sealed in this way is shown in Figure 8.
- the width of the outer liner is identical to or very slightly larger than that of the inner liner, although it is longer.
- Each of the inner and outer liners described above is fully sealed. This means that both primary and secondary containment are provided. This is advantageous because in the unlikely event of the inner liner being damaged, the outer liner can still fully contain any leakage.
- a hose 22 is attached to the collar 20, as shown in Figure 9.
- in-transit hose protectors 24 are attached to the outer liner 18. These protectors have straps 26 that can extend around the hose. Each strap is welded to the outer liner at several points along its length. Buckles 28 are provided at one end, so that the straps 26 can be wound round the hose 22 to hold it against the tank and then secured to the buckles.
- the flexitank is strong and relatively light. This is advantageous.
- the flexitanks of Figure 1 to 9 have an inner liner 10 and an outer liner 18, the flexitank can be formed from a single liner having two layers, each of which performs different functions.
- This liner is made from a blown film, which is double co-extruded, i.e. formed by extruding two liquified components at the same time.
- the inner liner has two layers, one of which is a 225 ⁇ m layer of the 75% to 25% mix of Elite (Metallocene) 5100 resin (C6 LLDPE) and EBA, the other of which is a 225 ⁇ m polyethylene (PE) outer layer.
- This outer layer is provided to improve the strength of the tank and replaces the outer liner 18 of the previously described embodiments.
- the single liner flexitank could be made from more than two layers of PE.
- a polyamide barrier could be included to act as a barrier to oxygen, thereby protecting oxygen sensitive foods in the tank, such as wine or extra virgin olive oil.
- the flexitank has five liners, four inner of which are joined together to define a 4-ply inner liner and one of which is an outer liner of woven polypropylene.
- An example of this is shown in Figures 10(a) and (b).
- Each of the four inner liners of this tank is formed using a triple co-extruded, blown film process.
- Each co-extruded layer comprises:
- each inner liner are selected to provide optimised performance.
- polyethylene is selected because it is strong, but relatively cheap and fully disposable.
- Metallocene has good transparency, is flexible, mechanically strong and provides a good seal, as well as being resistant to puncture. This is advantageous in a flexitank.
- EVA this is a soft, flexible plastic that is derived from low density polyethylene and vinyl acetate. It has good low temperature crack resistance and weatherability characteristics. This is advantageous, because it reduces flex cracking of the tank.
- EVA is also resistant to grease and oils.
- each of the four inner liners is formed using blown film techniques.
- each liner is formed by liquifying the constituent materials, extruding the materials and blowing them to form a bubble. In this case, however, each liner is triple co-extruded so that the bubble has three co-extruded layers.
- the Metallocene is the inner layer
- the LLD-PE is middle layer
- EVA forms the outer layer.
- the bubble that is blown is typically 125 ⁇ m thick.
- a first one-piece tube is made using the triple co-extrusion process. One end of the tube is sealed one one is left open. A second tube is then made to be substantially the same width as the first tube, but slightly longer. One end of this is sealed as before and the second tube is then stretched over the first tube. The same is then done for third and fourth tubes, each of these being the same width as the first tube, but slightly longer than the previous tube. It should be noted that because the first, second, third and fourth tubes are substantially the same width, there is a tight fight between each of these.
- each liner is sealed progressively nearer its end and the seams for the second, third and fourth liners join not only the ends of that liner, but also skirt portions of the previous liners.
- first liner is sealed; the end of the second liner and a skirt portion of the first liner are sealed together; the end of the third liner and skirt portions of the first and second liners are sealed together and so on, thereby to give, overall, a very strong and secure seal.
- Figure 10(c) a 4-ply inner liner 34 is formed. It should be noted that this liner has a translucent, waxy feeling surface, with good moisture vapour barrier characteristics and above average chemical resistance.
- the 4-ply inner liner 34 is placed inside a larger outer liner 36, which is made of woven polypropelene.
- This outer liner is added for strength and abrasion resistance.
- Woven polyproylene is made by weaving polypropylene tape in two directions. It is strong, recyclable and relatively inexpensive.
- the woven polypropelene is optionally coated with polyethylene. This coating adds strength and rigidity to the bag as well as making it dust tight and resistant to most oils and chemicals.
- a further advantage of using polyethylene is that it is compatible with the materials used for the 4-ply inner liner.
- a large, single sheet of woven polypropylene is formed into a tube.
- Use of a single sheet of material limits the number of seams needed.
- the size of the sheet is 4m by 4m.
- the 4-ply inner liner is inserted into it.
- Two holes are formed through the woven outer liner, each corresponding to those through the inner 4-ply liner.
- a collar is then welded to the male flange 30 on the inner liner and the outer liner, as shown in Figure 10(a). This collar (not shown) extends through the outer liner as before, which collar is adapted to receive the end of a hose for filling and emptying the tank.
- FIG. 11 An example of a suitable hose is shown in Figure 11.
- a pressure relief valve (not shown) for ensuring that the internal pressure of the tank does not exceed a pre-exceed a pre-set level.
- the ends of the woven polypropylene outer liner are sealed, typically by sewing them together.
- a flexitank is formed having has a four one piece liners that are placed one inside the other to form a 4-ply inner liner, the 4-ply inner liner 34 being sealed inside an outer woven polyproylene liner 36.
- a section through a wall of the flexitank of Figure 10(a) is shown in Figure 10(c).
- the flexitank of Figure 10 has many good physical characteristics as shown in Figure 12.
- the tank is very light weight, the woven polypropylene outer being only 220gsm and the total weight being only 790gsm. This is advantageous.
- the tank is also strong, flexible and has good elongation characteristics.
- the flexitank has very low oxygen and vapour permeability and so does not allow a large amount of water to permeate through its walls. This is advantageous when the tank is to be used to transport sensitive loads and in particular foodstuffs.
- it is wholly re-cyclable, which has clear environmental advantages.
- Using a multi-ply construction provides enhanced physical strength properties and improves containment, durability and safety.
- the materials used to make the flexitank have stretch and energy absorption capacity, which enables the tank to resist failure under the harshest of conditions.
- an additional inner liner could be provided in the flexitank of Figure 10, thereby to form a 5-ply inner liner.
- This fifth inner liner is a barrier liner that includes polyamide, which acts as a barrier to oxygen. This is useful to provide additional protection for flexitanks that are to be used to store food products.
- the additional polyamide liner is formed using blown film, co-extrusion techniques.
- the preferred composition of the polyamide liner is 37 ⁇ m of PE; 26 ⁇ m of polyamide and 37 ⁇ m of PE, in that order.
- a liner of this nature has barrier characteristics of 15cm 3 /m 2 . 24h/l atm. This is advantageous. Further characteristics of the barrier liner are provided in Figure 12.
- the dimensions of the flexitank can be varied.
- the inner liner is 7470mm long and 3950mm wide, as measured when flat.
- tanks of different capacities could be made, although flexitanks are typically in the size range of 16,000 litres to 24,000 litres.
- the inner liners of all of the flexitanks described above are formed using a blown film tube.
- blowing techniques enables a co-extrusion process to be employed.
- the materials used are ultra-high tensile, preferably multi-ply, ethylene co-polymers, which are resistant to most inorganic acids and alkalis at room temperature.
- they are insoluble in organic solvents below 60C.
- they have a good resistance to impact, over a wide temperature range, typically -25C to 80C.
- An advantage of the flexitank in which the invention is embodied is that it is cheap to produce.
- the manufacturing process involves a minimal amount of handling compared to current flexitank processing.
- the interior of the flexitank is not exposed to human contact or the atmosphere, thereby making it extremely hygenic. This is useful when the tank is to be used for storing food products.
- the use of polyethylene enables the tank to provide good performance and area yield with a minimum of material consumption. This is good from an ecological perspective.
- the tank can be recycled, making it more environmentally friendly.
- the flexitank is fully disposable. This is advantageous because it avoids the need for re-cleaning of the tank and the inevitable health concerns associated with doing so.
- a further advantage of the flexitanks in which the present invention is embodied is that they are less susceptible to leaking than known tanks and so provide improved performance.
- Tanks can be manufactured to exceed industry standards at a lower cost than existing technology.
- All of the liners described above can be made relatively cheaply to conform and comply with standards set by the FDA, the BGA and the Japanese Canning Authority. Furthermore, they show good puncture resistance, impact strength and good tear strength.
- the flexitanks are wholly disposable, which has environmental advantages.
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- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Laminated Bodies (AREA)
- Application Of Or Painting With Fluid Materials (AREA)
- Moulding By Coating Moulds (AREA)
- Extrusion Moulding Of Plastics Or The Like (AREA)
- Tubes (AREA)
- Details Of Rigid Or Semi-Rigid Containers (AREA)
Abstract
Description
Claims (37)
- A flexible tank for liquids, having a capacity in the range 16,000 litres to 24,000 litres, the tank comprising a one piece body portion of flexible material that is formed using a blown film process to create a seamless tube of substantially uniform lateral dimension closed at each end by a single lateral seam.
- A flexible tank as claimed in claim 1 wherein two one piece body portions are provided, one forming an inner liner and the other forming an outer liner.
- A flexible tank as claimed in any of claims 1 or 2, wherein the ends of the tube are closed by welding.
- A flexible tank as claimed in any one of the preceding claims, wherein the one piece body portion is made of polyethylene.
- A flexible tank as claimed in claim 4, wherein the one piece body portion is made of a polyethylene based resin and a bonding agent.
- A flexible tank as claimed in claim 5, wherein the ratio of the resin to bonding agent is 75% to 25%.
- A flexible tank as claimed in claim 5 or claim 6, wherein the resin is Elite (Metallocene) 5100 resin (C6 Linear low density polyethylene (LLDPE)).
- A flexible tank as claimed in claim 5, 6 or 7 wherein the bonding agent is a co-polymer, preferably ethylene butyl acrylate (EBA).
- A flexible tank as claimed in any preceding claim, wherein the or each one piece body portion comprises two or more materials, preferably in layers, for example three or four layers.
- A flexible tank as claimed in claim 9, wherein a layer of the body portion comprises a material that is adapted to reduce flex cracking.
- A flexible tank as claimed in claim 10, wherein the material that is adapted to reduce flex cracking comprises ethylene vinyl acetate.
- A flexible tank as claimed in any preceding claim, wherein the body portion, or at least one of the body portions, comprises a barrier layer adapted to act as a barrier to oxygen and/or water vapour.
- A flexible tank as claimed in claim 12, wherein the barrier layer comprises polyamide.
- A flexible tank as claimed in claim 1, comprising a further outer liner.
- A flexible tank as claimed in claim 2 or 14, wherein the outer liner is made of woven polypropylene.
- A flexible tank as claimed in claim 15, wherein the woven polypropylene outer liner is coated on an inner surface with polyethylene.
- A flexible tank as claimed in any preceding claim, wherein the material of the body portion has a thickness of 125µm.
- A dry goods container converted for transporting bulk liquids by incorporating a flexible tank as claimed in any preceding claim.
- A method of forming a flexible tank for bulk liquids having a capacity in the range 16,000 to 24,000 litres, the method comprising forming a one piece body portion of flexible material of substantially uniform lateral dimension using a blown film process to create a tube closed at each end by a single lateral seam.
- A method as claimed in claim 19, comprising sealing the ends of the tube at the seam by welding.
- A method as claimed in claim 19 or 20, wherein the step of blowing the body portion comprises co-extruding at least two layers of material to form the body portion.
- A method as claimed in any of claims 19 to 21, comprising forming a plurality of one piece body portions and fitting the body portions inside each other.
- A method as claimed in any of claims 19 to 22, wherein the one piece body portion is made of material that comprises a blend of resin and a bonding agent.
- A method as claimed in claim 23, wherein the ratio of the resin to bonding agent is 75% to 25%.
- A method as claimed in claim 23 or 24, wherein the resin is Elite (Metallocene) 5100 resin (C6 LLDPE).
- A method as claimed in any one of claims 19 to 25, wherein the or each piece body portion comprises two or more materials, preferably in layers, for example three or four layers.
- A method as claimed in claim 26, comprising forming a layer of the body portion using a material that is adapted to reduce flex cracking.
- A method as claimed in claim 27, wherein the material that is adapted to reduce flex cracking comprises ethylene vinyl acetate.
- A method as claimed in any of claims 19 to 28, wherein the flexible material is polyethylene.
- A method as claimed in any one of claims 19 to 29, comprising forming the body portion with a barrier layer adapted to act as a barrier to oxygen and/or water vapour.
- A method as claimed in claim 30, wherein the barrier layer comprises polyamide.
- A method as claimed in any of claims 19 to 31, comprising co-extruding a plurality of materials for the body portion for the blown film process.
- A method as claimed in claim 19, comprising forming an outer liner and locating the body portion in the outer liner.
- A method as claimed in claim 19, wherein the outer liner is made of woven polypropylene.
- A method as claimed in claim 34, including coating an inner surface of the woven polypropylene outer liner with polyethylene.
- A method as claimed in any of claims 19 to 35, comprising forming the body portion so that it has a thickness in the range of 125µm.
- A method of converting a dry goods container for transporting bulk liquid, comprising arranging a flexible tank as claimed in any of claims 1 to 18 inside the container.
Priority Applications (3)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
DE20121939U DE20121939U1 (en) | 2000-03-22 | 2001-03-22 | Flexible tank of storing and transporting fluids, comprises one piece body formed using blown film technique |
DE20121807U DE20121807U1 (en) | 2000-03-22 | 2001-03-22 | Flexible tank of storing and transporting fluids, comprises one piece body formed using blown film technique |
DE20121803U DE20121803U1 (en) | 2000-03-22 | 2001-03-22 | Flexible tank of storing and transporting fluids, comprises one piece body formed using blown film technique |
Applications Claiming Priority (3)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
GBGB0006973.2A GB0006973D0 (en) | 2000-03-22 | 2000-03-22 | A flexible tank and method of making such a tank |
GB0006973 | 2000-03-22 | ||
PCT/IB2001/000486 WO2001070598A2 (en) | 2000-03-22 | 2001-03-22 | A flexible tank and method of making such a tank |
Publications (2)
Publication Number | Publication Date |
---|---|
EP1268312A2 EP1268312A2 (en) | 2003-01-02 |
EP1268312B1 true EP1268312B1 (en) | 2004-05-19 |
Family
ID=9888215
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
EP01914124A Revoked EP1268312B1 (en) | 2000-03-22 | 2001-03-22 | A flexible tank for liquids and method of making such a tank |
Country Status (11)
Country | Link |
---|---|
US (1) | US20050018930A1 (en) |
EP (1) | EP1268312B1 (en) |
CN (1) | CN1232430C (en) |
AT (1) | ATE267125T1 (en) |
AU (1) | AU3950201A (en) |
DE (1) | DE60103386T2 (en) |
ES (1) | ES2220738T3 (en) |
GB (2) | GB0006973D0 (en) |
HK (1) | HK1053290A1 (en) |
WO (1) | WO2001070598A2 (en) |
ZA (1) | ZA200207591B (en) |
Families Citing this family (5)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US6626312B2 (en) * | 2000-06-28 | 2003-09-30 | Javier Urzua Maturana | Storage bag |
WO2010056219A2 (en) | 2008-11-14 | 2010-05-20 | Yusuf Kohen | Wave preventing flexible tank for liquids |
EP2616369B1 (en) | 2010-06-17 | 2015-10-14 | Likua Endustriyel Ambalaj Malzm.San.Ve Tic.Ltd.Sti | A flexible tank for the transportation of liquids |
IL249917A0 (en) * | 2017-01-03 | 2017-06-29 | Ez Pack Water Ltd | Method and system for pumping water from a flexible tank through intermediate air box |
WO2024033575A1 (en) * | 2022-08-08 | 2024-02-15 | Arkema France | Packaging, package having such packaging, use of such packaging, mixing device, and method for loading and/or unloading |
Family Cites Families (11)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
DE3625224A1 (en) * | 1986-07-25 | 1988-02-04 | Lohse Juergen | FLEXIBLE CONTAINER |
CA2051577A1 (en) * | 1990-10-31 | 1992-05-01 | Norwin C. Derby | Variable diameter hollow extruded articles and method of manufacture |
EP0567383A2 (en) * | 1992-04-21 | 1993-10-27 | Chemfab Corporation | Fluid storage tanks and liners |
DE9303805U1 (en) * | 1993-03-15 | 1993-06-09 | Blumenkron, Jorge Lopez, Puebla | Flexible liquid tank |
US5491019A (en) * | 1994-03-28 | 1996-02-13 | W. R. Grace & Co.-Conn. | Oxygen-permeable multilayer film |
US5576366A (en) * | 1995-02-03 | 1996-11-19 | Lyondell Petrochemical Company | Dyeable polyolefin compositions and method |
US5584411A (en) * | 1995-11-21 | 1996-12-17 | Chemical Engineering Corporation | Tank assembly and method for water treatment |
US5928740A (en) * | 1997-02-28 | 1999-07-27 | Viskase Corporation | Thermoplastic C2 -α-olefin copolymer blends and films |
AU702218B2 (en) * | 1997-03-31 | 1999-02-18 | Kyushu-Taiyoukasei., Ltd. | Liner film for bulk container and container liner |
ID21647A (en) * | 1997-09-04 | 1999-07-08 | Kyushu Taiyoukasei Ltd | CONTAINER |
US6139482A (en) * | 1999-02-12 | 2000-10-31 | Custom Packaging Systems, Inc. | Bulk bag or liner and method of making it |
-
2000
- 2000-03-22 GB GBGB0006973.2A patent/GB0006973D0/en not_active Ceased
-
2001
- 2001-03-22 WO PCT/IB2001/000486 patent/WO2001070598A2/en active IP Right Grant
- 2001-03-22 CN CNB018088147A patent/CN1232430C/en not_active Expired - Fee Related
- 2001-03-22 EP EP01914124A patent/EP1268312B1/en not_active Revoked
- 2001-03-22 AT AT01914124T patent/ATE267125T1/en not_active IP Right Cessation
- 2001-03-22 DE DE60103386T patent/DE60103386T2/en not_active Revoked
- 2001-03-22 ES ES01914124T patent/ES2220738T3/en not_active Expired - Lifetime
- 2001-03-22 AU AU39502/01A patent/AU3950201A/en not_active Abandoned
- 2001-03-22 GB GB0107249A patent/GB2360816B/en not_active Expired - Fee Related
-
2002
- 2002-09-20 ZA ZA200207591A patent/ZA200207591B/en unknown
-
2003
- 2003-06-13 HK HK03104247A patent/HK1053290A1/en not_active IP Right Cessation
-
2004
- 2004-08-16 US US10/919,206 patent/US20050018930A1/en not_active Abandoned
Also Published As
Publication number | Publication date |
---|---|
US20050018930A1 (en) | 2005-01-27 |
GB2360816A (en) | 2001-10-03 |
GB2360816B (en) | 2003-04-02 |
DE60103386T2 (en) | 2004-10-28 |
GB0107249D0 (en) | 2001-05-16 |
WO2001070598A3 (en) | 2002-04-04 |
AU3950201A (en) | 2001-10-03 |
GB0006973D0 (en) | 2000-05-10 |
EP1268312A2 (en) | 2003-01-02 |
WO2001070598A2 (en) | 2001-09-27 |
ATE267125T1 (en) | 2004-06-15 |
ZA200207591B (en) | 2003-07-16 |
HK1053290A1 (en) | 2003-10-17 |
ES2220738T3 (en) | 2004-12-16 |
CN1427792A (en) | 2003-07-02 |
CN1232430C (en) | 2005-12-21 |
DE60103386D1 (en) | 2004-06-24 |
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