US20050031231A1 - Type B bulk bag with liner - Google Patents
Type B bulk bag with liner Download PDFInfo
- Publication number
- US20050031231A1 US20050031231A1 US10/894,948 US89494804A US2005031231A1 US 20050031231 A1 US20050031231 A1 US 20050031231A1 US 89494804 A US89494804 A US 89494804A US 2005031231 A1 US2005031231 A1 US 2005031231A1
- Authority
- US
- United States
- Prior art keywords
- bulk bag
- liner
- side walls
- bulk
- type
- 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.)
- Abandoned
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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
- B65D88/00—Large containers
- B65D88/16—Large containers flexible
- B65D88/1612—Flexible intermediate bulk containers [FIBC]
- B65D88/1668—Flexible intermediate bulk containers [FIBC] closures for top or bottom openings
-
- 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
- B65D88/00—Large containers
- B65D88/16—Large containers flexible
- B65D88/1612—Flexible intermediate bulk containers [FIBC]
- B65D88/165—Flexible intermediate bulk containers [FIBC] with electrically conductive properties
Definitions
- This invention relates generally to bulk bags, and more particularly to an assembly comprising a bulk bag fabricated from woven polypropylene fabric and having a plastic film liner which meets the definition of a Type B bulk bag.
- Types A, B, C, and D Flexible Intermediate Bulk Containers a/k/a FIBC's a/k/a bulk bags are divided into four categories, i.e., Types A, B, C, and D.
- Type A bulk bags comprise any standard bulk bag, with or without a liner, which is designed for use in environments comprising no explosion hazard caused by dusts, gases, vapors, or otherwise.
- Type C and Type D bulk bags are conductive and dissipative, respectively, and are used for sensitive explosive environments.
- a Type B bulk bag comprises a bulk bag wherein the breakdown voltage of the combined fabric/coating/liner is less than 4 kilovolts. Breakdown voltage is defined as the amount of charge necessary to jump from a probe, through a combined material, to a grounded plate. According to the Swiss Institute for the Promotion of Safety and Security, a Type B bulk bag can be used in circumstances where there are explosive dusts having a minimum ignition energy (MIE) greater than 3 millijoules, but no explosive gases or vapors. MIE is defined as the lowest energy spark that can ignite a perfect mixture of the product, air, and whatever gases are present.
- MIE minimum ignition energy
- the present invention comprises a Type B bulk bag with liner which overcomes the foregoing and other difficulties which have long since characterized the prior art.
- the bulk bag of the present invention is formed from conventional 5 ounce per square yard, uncoated woven polypropylene fabric.
- the liner is formed from a unique blown film resin marketed by Basell Polyolefins under the trademark “ADFLEX Q 100 F”. Testing by Chilworth Technology confirms that the fabric/liner combination utilized in the construction of the bulk bag of the present invention meets or exceeds the 4 kilovolt breakdown voltage test for Type B bulk bags in conditions of ambient relative humidity with only a few data points slightly above the 4 kilovolt level when the tests are conducted at very low humidity.
- FIG. 1 is a perspective view of a bulk bag/liner combination incorporating the present invention in which certain component parts have been broken away more clearly to illustrate certain features of the invention.
- FIG. 2 is a diagrammatic sectional view taken the line 2 - 2 in FIG. 1 in the direction of the arrows in which certain parts have been omitted for clarity.
- the bulk bag 10 comprises four side walls 12 , a top wall 14 , and a bottom wall 16 .
- the present invention is equally applicable to tubular bulk bags, U-panel bulk bags, and numerous other bulk bag constructions all of which are well known in the art.
- the side walls 12 , the top wall 14 , and the bottom wall 16 comprising the bulk bag 10 are all formed from woven polypropylene fabric. More specifically, the side walls 12 , the top wall 14 , and the bottom wall 16 are formed from conventional 5 ounce per square yard uncoated woven polypropylene fabric. The side walls 12 , the top wall 14 , the bottom wall 16 , and the other components of the bulk bag 10 are joined one to another by sewing along sew lines 17 in the conventional manner. Conventional lift loops 18 may be provided at the upper corners of the bulk bag 10 .
- the top wall 14 of the bulk bag 10 includes a conventional fill chute or spout which is also formed from woven polypropylene fabric.
- the fill chute or spout typically comprises a right circular cylinder extending upwardly from the center of the top wall 14 , however, other fill chute configurations are known in the art.
- the bottom wall 16 includes a discharge chute or spout 19 .
- the discharge chute or spout 19 typically comprises a right circular cylinder extending downwardly from the center of the bottom wall 16 , although other discharge chute configurations are known in the art.
- a liner 20 extends through the interior of the bulk bag 10 .
- the liner 20 comprises a formed liner having exterior dimensions which are closely matched to the interior dimensions of the bulk bag 10 .
- the liner 20 includes a fill chute portion 24 which extends through the fill chute of the top wall 14 of the bulk bag 10 , and a discharge chute portion 28 which extends through the discharge chute 18 of the bottom wall 16 of the bulk bag 10 .
- the liner 20 comprises side walls 22 which extend parallel to and which are closely spaced relative to the side walls 12 of the bulk bag 10 .
- the liner 20 is fabricated from the polyolefin material manufactured by Basell Polyolefins and sold by that company under the trademark “ADFLEX Q 100 F”. A further description of such material is provided on the following page.
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- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Bag Frames (AREA)
Abstract
A Type B bulk bag/liner assembly comprises a bulk bag formed from woven polypropylene fabric and a liner formed from “ADFLEX Q 100 F” (™) film.
Description
- This application claims priority of prior provisional Application Ser. No. 60/493,234 filed Aug. 7, 2003.
- This invention relates generally to bulk bags, and more particularly to an assembly comprising a bulk bag fabricated from woven polypropylene fabric and having a plastic film liner which meets the definition of a Type B bulk bag.
- Flexible Intermediate Bulk Containers a/k/a FIBC's a/k/a bulk bags are divided into four categories, i.e., Types A, B, C, and D. Type A bulk bags comprise any standard bulk bag, with or without a liner, which is designed for use in environments comprising no explosion hazard caused by dusts, gases, vapors, or otherwise. Type C and Type D bulk bags are conductive and dissipative, respectively, and are used for sensitive explosive environments.
- A Type B bulk bag comprises a bulk bag wherein the breakdown voltage of the combined fabric/coating/liner is less than 4 kilovolts. Breakdown voltage is defined as the amount of charge necessary to jump from a probe, through a combined material, to a grounded plate. According to the Swiss Institute for the Promotion of Safety and Security, a Type B bulk bag can be used in circumstances where there are explosive dusts having a minimum ignition energy (MIE) greater than 3 millijoules, but no explosive gases or vapors. MIE is defined as the lowest energy spark that can ignite a perfect mixture of the product, air, and whatever gases are present.
- Most woven polypropylene fabrics, even with a 1 mil polypropylene coating, easily pass the four kilovolt test. However, heretofore it has not been possible to provide a bulk bag formed from woven polypropylene fabric having a plastic film liner which is capable of meeting the 4 kilovolt test. In most instances bulk bags comprising woven polypropylene fabric and a plastic film liner have a breakdown voltage in the range of between 10 kilovolts and 15 kilovolts, and therefore fail to pass the four kilovolt test by a considerable margin.
- Some products require the use of a liner due to moisture sensitivity, D.O.T. requirements, or to prevent the sifting of fine particles through the seams of the bulk bag, but otherwise would not require a bulk bag having characteristics which would exceed those of a Type B bulk bag. Without the availability of a Type B bulk bag having a liner, the purchaser has no choice other than to use a Type C bulk bag having a conductive or anti-static liner. This necessity substantially increases packaging costs. Thus, a need exists for a bulk bag constructed from woven polypropylene fabric and provided with a plastic film liner which meets the definition of a Type B bulk bag by meeting or surpassing the four kilovolt breakdown voltage test.
- The present invention comprises a Type B bulk bag with liner which overcomes the foregoing and other difficulties which have long since characterized the prior art. The bulk bag of the present invention is formed from conventional 5 ounce per square yard, uncoated woven polypropylene fabric. The liner is formed from a unique blown film resin marketed by Basell Polyolefins under the trademark “ADFLEX Q 100 F”. Testing by Chilworth Technology confirms that the fabric/liner combination utilized in the construction of the bulk bag of the present invention meets or exceeds the 4 kilovolt breakdown voltage test for Type B bulk bags in conditions of ambient relative humidity with only a few data points slightly above the 4 kilovolt level when the tests are conducted at very low humidity. More importantly, no propagating brush discharges (which could ignite explosive dusts) were observed during the testing. Ultimately, it is the absence of high energy propagating brush discharges that is the object of a Type B bulk bag since the 4 kilovolt breakdown voltage test is universally recognized as a very conservative standard.
- A more complete understanding of the present invention may be had by reference to the following Detailed Description when taken in connection with the accompanying Drawings, wherein:
-
FIG. 1 is a perspective view of a bulk bag/liner combination incorporating the present invention in which certain component parts have been broken away more clearly to illustrate certain features of the invention; and -
FIG. 2 is a diagrammatic sectional view taken the line 2-2 inFIG. 1 in the direction of the arrows in which certain parts have been omitted for clarity. - Referring now to the Drawings, and particularly to
FIG. 1 thereof, there is shown abulk bag 10 incorporating the present invention. Thebulk bag 10 comprises fourside walls 12, atop wall 14, and abottom wall 16. However, as will be readily understood by those skilled in the art, the present invention is equally applicable to tubular bulk bags, U-panel bulk bags, and numerous other bulk bag constructions all of which are well known in the art. - The
side walls 12, thetop wall 14, and thebottom wall 16 comprising thebulk bag 10 are all formed from woven polypropylene fabric. More specifically, theside walls 12, thetop wall 14, and thebottom wall 16 are formed from conventional 5 ounce per square yard uncoated woven polypropylene fabric. Theside walls 12, thetop wall 14, thebottom wall 16, and the other components of thebulk bag 10 are joined one to another by sewing alongsew lines 17 in the conventional manner.Conventional lift loops 18 may be provided at the upper corners of thebulk bag 10. - The
top wall 14 of thebulk bag 10 includes a conventional fill chute or spout which is also formed from woven polypropylene fabric. The fill chute or spout typically comprises a right circular cylinder extending upwardly from the center of thetop wall 14, however, other fill chute configurations are known in the art. Thebottom wall 16 includes a discharge chute orspout 19. The discharge chute orspout 19 typically comprises a right circular cylinder extending downwardly from the center of thebottom wall 16, although other discharge chute configurations are known in the art. - A
liner 20 extends through the interior of thebulk bag 10. Theliner 20 comprises a formed liner having exterior dimensions which are closely matched to the interior dimensions of thebulk bag 10. Theliner 20 includes afill chute portion 24 which extends through the fill chute of thetop wall 14 of thebulk bag 10, and adischarge chute portion 28 which extends through thedischarge chute 18 of thebottom wall 16 of thebulk bag 10. - Referring simultaneously to
FIGS. 1 and 2 , theliner 20 comprisesside walls 22 which extend parallel to and which are closely spaced relative to theside walls 12 of thebulk bag 10. Although the phenomenon which affords the bulk bag/liner combination of the present invention the ability to provide the previously unattainable Type B bulk bag results in a bulk bag/liner combination is not fully understood, it is theorized that the close spatial relationship between theside walls 12 of thebulk bag 10 and theside wall 22 of theliner 20 may contribute thereto. -
-
- Although preferred embodiments of the invention have been illustrated in the accompanying Drawing and described in the foregoing Detailed Description, it will be understood that the invention is not limited to the embodiments disclosed but is capable of numerous rearrangements, modifications, and substitutions of parts and elements without departing from the spirit of the invention.
Claims (10)
1. A Type B bulk bag assembly comprising:
a bulk bag formed from at least one panel comprising woven polypropylene fabric; and
a liner for the bulk bag comprising polyolefin film formed from “ADFLEX Q 100 F” (™) film.
2. The bulk bag assembly according to claim 1 wherein the bulk bag comprises four side walls, a top wall, and a bottom wall, and wherein the liner comprises a formed liner including side walls each positioned closely adjacent to and extending substantially parallel to one of the side walls of the bulk bag.
3. The bulk bag assembly according to claim 1 wherein the bulk bag comprises 5 ounce woven polypropylene fabric and wherein the liner comprises a blown film.
4. In combination with a bulk bag formed from woven polypropylene fabric and comprising at least one side wall, a top wall, and a bottom wall, the improvement comprising:
a liner for the bulk bag comprising polyolefin film formed from “ADFLEX Q 100 F” (™) film and including at least one side wall positioned closely adjacent to the side wall of the bulk bag;
the combination of the bulk bag and the liner comprising a Type B bulk bag assembly.
5. The bulk bag assembly according to claim 5 wherein the bulk bag comprises four side walls, a top wall, and a bottom wall, and wherein the liner comprises a formed liner including four side walls each positioned closely adjacent to and extending substantially parallel to one of the side walls of the bulk bag.
6. The bulk bag assembly according to claim 5 wherein the bulk bag comprises 5 ounce woven polypropylene fabric and wherein the liner comprises a blown film.
7. A Type B bulk bag/liner combination comprising:
a bulk bag comprising four side walls, a top wall, a fill chute extending upwardly from the center of the top wall, a bottom wall, and a discharge chute extending downwardly from the center of the bottom wall; and
a liner for the bulk bag comprising polyolefin film formed from “ADFLEX Q 100 F” (™) film and including four side walls each extending parallel to and positioned closely adjacent to one of the side walls of the bulk bag, a fill chute extending through the fill chute of the bulk bag, and a discharge chute extending through the discharge chute of the bulk bag.
8. The bulk bag assembly according to claim 7 wherein the bulk bag comprises 5 ounce woven polypropylene fabric and wherein the liner comprises a blown film.
9. The bulk bag according to claim 8 wherein the side walls, the top wall, the fill chute, the bottom wall, and the discharge are joined one to another by sewing.
10. The bulk bag/liner combination according to claim wherein the liner comprises a formed liner.
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
US10/894,948 US20050031231A1 (en) | 2003-08-07 | 2004-07-20 | Type B bulk bag with liner |
Applications Claiming Priority (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
US49323403P | 2003-08-07 | 2003-08-07 | |
US10/894,948 US20050031231A1 (en) | 2003-08-07 | 2004-07-20 | Type B bulk bag with liner |
Publications (1)
Publication Number | Publication Date |
---|---|
US20050031231A1 true US20050031231A1 (en) | 2005-02-10 |
Family
ID=34119068
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
US10/894,948 Abandoned US20050031231A1 (en) | 2003-08-07 | 2004-07-20 | Type B bulk bag with liner |
Country Status (1)
Country | Link |
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US (1) | US20050031231A1 (en) |
Cited By (4)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
WO2011068991A1 (en) * | 2009-12-02 | 2011-06-09 | Luzenac America, Inc. | Flexible bulk storage container having a discharge chute |
WO2015015085A2 (en) | 2013-08-02 | 2015-02-05 | Roquette Freres | Flexible storage device comprising a flexible container, and an inner liner |
FR3009290A1 (en) * | 2013-08-02 | 2015-02-06 | Roquette Freres | BULK STORAGE DEVICE FOR PULVERULENT MATERIALS |
US20170197780A1 (en) * | 2014-07-11 | 2017-07-13 | Bayer Aktiengesellschaft | Earthable flexible intermediate bulk container |
Citations (6)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US3204825A (en) * | 1961-10-23 | 1965-09-07 | Union Carbide Corp | Multi-ply liner bag |
US5183086A (en) * | 1990-08-27 | 1993-02-02 | Allwaste Services, Inc. | Encapsulation method for the containment of waste and salvageable products |
US5618254A (en) * | 1995-04-27 | 1997-04-08 | Super Sack Mfg. Corp. | Gusseted bulk bag liner and method of manufacture |
US6207592B1 (en) * | 1997-05-19 | 2001-03-27 | Super Sack Manufacturing Corp. | Anti-static films and anti-static fabrics for use in manufacturing bulk bag liners and bulk bags |
US6585843B2 (en) * | 1992-01-10 | 2003-07-01 | Super Sack Mfg. Corp. | Anti-static, anti-corrosion, and/or anti-microbial films, fabrics, and articles |
US6834995B1 (en) * | 2003-07-14 | 2004-12-28 | Kmcc Western Australia Pty Ltd | Bulk bag having a pair of loops to secure the discharge opening in a closed position |
-
2004
- 2004-07-20 US US10/894,948 patent/US20050031231A1/en not_active Abandoned
Patent Citations (6)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US3204825A (en) * | 1961-10-23 | 1965-09-07 | Union Carbide Corp | Multi-ply liner bag |
US5183086A (en) * | 1990-08-27 | 1993-02-02 | Allwaste Services, Inc. | Encapsulation method for the containment of waste and salvageable products |
US6585843B2 (en) * | 1992-01-10 | 2003-07-01 | Super Sack Mfg. Corp. | Anti-static, anti-corrosion, and/or anti-microbial films, fabrics, and articles |
US5618254A (en) * | 1995-04-27 | 1997-04-08 | Super Sack Mfg. Corp. | Gusseted bulk bag liner and method of manufacture |
US6207592B1 (en) * | 1997-05-19 | 2001-03-27 | Super Sack Manufacturing Corp. | Anti-static films and anti-static fabrics for use in manufacturing bulk bag liners and bulk bags |
US6834995B1 (en) * | 2003-07-14 | 2004-12-28 | Kmcc Western Australia Pty Ltd | Bulk bag having a pair of loops to secure the discharge opening in a closed position |
Cited By (9)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
WO2011068991A1 (en) * | 2009-12-02 | 2011-06-09 | Luzenac America, Inc. | Flexible bulk storage container having a discharge chute |
CN102811925A (en) * | 2009-12-02 | 2012-12-05 | 英默里斯滑石美国有限公司 | Flexible Bulk Storage Container Having A Discharge Chute |
CN102811925B (en) * | 2009-12-02 | 2015-11-25 | 英默里斯滑石美国有限公司 | There is the flexible bulk storage container of discharge chute |
WO2015015085A2 (en) | 2013-08-02 | 2015-02-05 | Roquette Freres | Flexible storage device comprising a flexible container, and an inner liner |
FR3009290A1 (en) * | 2013-08-02 | 2015-02-06 | Roquette Freres | BULK STORAGE DEVICE FOR PULVERULENT MATERIALS |
WO2015015085A3 (en) * | 2013-08-02 | 2015-04-16 | Roquette Freres | Flexible storage device comprising a flexible container and an inner liner, method for the production thereof, and use thereor |
CN105517919A (en) * | 2013-08-02 | 2016-04-20 | 罗盖特公司 | Flexible storage device comprising a flexible container and an inner liner, method for the production thereof, and use thereor |
US9938076B2 (en) | 2013-08-02 | 2018-04-10 | Roquette Freres | Flexible storage device comprising a flexible container and an inner liner |
US20170197780A1 (en) * | 2014-07-11 | 2017-07-13 | Bayer Aktiengesellschaft | Earthable flexible intermediate bulk container |
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Legal Events
Date | Code | Title | Description |
---|---|---|---|
AS | Assignment |
Owner name: B.A.G. CORP., TEXAS Free format text: ASSIGNMENT OF ASSIGNORS INTEREST;ASSIGNORS:EISENBARTH, BARADLEY MATTHEW;BROWN, BOBBY GLENN;REEL/FRAME:015608/0860 Effective date: 20040717 |
|
STCB | Information on status: application discontinuation |
Free format text: ABANDONED -- FAILURE TO RESPOND TO AN OFFICE ACTION |