WO2009016644A1 - Sac tissé feuilleté et procédé de fabrication d'un sac tissé feuilleté - Google Patents

Sac tissé feuilleté et procédé de fabrication d'un sac tissé feuilleté Download PDF

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Publication number
WO2009016644A1
WO2009016644A1 PCT/IN2007/000468 IN2007000468W WO2009016644A1 WO 2009016644 A1 WO2009016644 A1 WO 2009016644A1 IN 2007000468 W IN2007000468 W IN 2007000468W WO 2009016644 A1 WO2009016644 A1 WO 2009016644A1
Authority
WO
WIPO (PCT)
Prior art keywords
bag
back wall
attaching
laminated
laminated woven
Prior art date
Application number
PCT/IN2007/000468
Other languages
English (en)
Inventor
Ashok Chaturvedi
Original Assignee
Ashok Chaturvedi
Priority date (The priority date 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 date listed.)
Filing date
Publication date
Application filed by Ashok Chaturvedi filed Critical Ashok Chaturvedi
Publication of WO2009016644A1 publication Critical patent/WO2009016644A1/fr

Links

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
    • B65D31/00—Bags or like containers made of paper and having structural provision for thickness of contents
    • B65D31/02—Bags or like containers made of paper and having structural provision for thickness of contents with laminated walls
    • 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
    • B65D33/00—Details of, or accessories for, sacks or bags
    • B65D33/16—End- or aperture-closing arrangements or devices
    • B65D33/25—Riveting; Dovetailing; Screwing; using press buttons or slide fasteners
    • B65D33/2508—Riveting; Dovetailing; Screwing; using press buttons or slide fasteners using slide fasteners with interlocking members having a substantially uniform section throughout the length of the fastener; Sliders therefor
    • 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
    • B65D33/00—Details of, or accessories for, sacks or bags
    • B65D33/16—End- or aperture-closing arrangements or devices
    • B65D33/26—End- or aperture-closing arrangements or devices using staples or stitches

Definitions

  • the invention relates to a laminated woven polymer bag and method for making a laminated woven bag. More particularly a laminated woven bag for packaging & storing of bulk product including powder and granular form of food products , pet / animal foods or packaging of fertilizers, cement & chemicals etc.
  • N bags available as on today for packaging of bulk products are made of multi layer film or woven for packaging of food products like seeds, fertilizers etc. These kinds of bags do have processing troubles & have disadvantages of handling, carrying, storing and do not have sufficient strength. These bags don't have good barrier resistance properties. Good quality of printing is not possible because of non uniform lamination throughout the surface of woven.
  • the bag does not have sufficient strength to withstand the product load because they are sealed which can give away easily. These kinds of bags do have easy tearing and are slippery on the surface, hence not suitable for large / bulk pack like 10 to 15 kg. or more.
  • the woven fabric is made from thin strip of Polyethylene or Polypropylene or any other suitable polymer or blend, in predefined size are woven together in tube form. A pre printed film of polymer is laminated on the outside surface of the woven tube to represent the product printing graphics and product details.
  • US 2007/0082158 relates to a multi-layered composite bag used to store bulk type products like pet food, seeds, fertilizer, cereals, grains and other bulk products intended for human and non-human consumption.
  • This bag comprises a middle layer of woven mesh tubing to which an outer layer of solid plastic film is adhered using polypropylene or some other poly laminate.
  • the first draw back of these bags is the poor quality of the film lamination on the woven, as the woven is in a tubular form. There is either a naked area (un- laminated) left at both the sides of the folding edge of the tube as the film lamination will always leave some gap at the folded side edge of the tube since the film lamination can not reach the folding area of the tube or the lamination is done extending on both the sides, sealed together & trimmed, leaving a hanging band of laminate film on both the sides.
  • the other limitation of this type of bag is that the tube needs to be woven in various sizes depending upon the bag sizes required, whereas circular loom processing is not commercially viable for small quantity requirements in different sizes of bags requiring different sizes of tube.
  • the object of the instant invention provides a laminated woven bag for packaging of bulk food products and a method for making a laminated woven bag.
  • It is still another object of the present invention is to provide a re-closable and reusable laminated woven bag.
  • Yet another objective of the present invention is to provide easy carrying, tamper proof evidence laminated woven bag.
  • the present invention provides a laminated woven bag comprising : • a printed laminated woven web folded at two ends overlapping & sealed to form a front and a back wall of the bag, in the form of a tube,
  • a top closing means attached to the front and back walls of said bag for re- closing top opening of the bag or reusing the said bag
  • the present invention also includes a method for making a laminated woven bag comprising the steps of:
  • Figure 1 shows the front view of a laminated woven sealed tube with side gussets according to the present invention
  • Figure 2 shows the front view of a complete bag with Zipper and diaphragm.
  • Figure 3 shows the front view of a complete bag with Zipper and without diaphragm seal.
  • Figure 4 describes the overlap seal of front and bottom wall.
  • Figure 5 shows the formation of side gusset from Front and back wall.
  • Figure 6 shows the Zipper and diaphragm attachment with front and back wall.
  • Figure 7 shows attachment of zipper without diaphragm with front and back walls of the bag.
  • Figure 8 shows the Bottom end of the bag for product feeding.
  • Figure 9 shows the cross sectional view of the zipper, slider, and diaphragm fixed with front and back wall.
  • Figures 10A, 10B shows the attachment of a tape with the woven bag and Figure 10C shows a side view of a woven bag with sealed tape.
  • the laminated woven bag can be re-closable and re-open able.
  • the bag provides a temper proof evidence property by diaphragm or filler tape or a sealed tape.
  • a handle is attached to the bag for easy carrying of the bag.
  • the laminated woven is prepared from flat woven fabric in the form of roll and not from a woven tube. In this case 100% area is laminated from one end to the other end, across the width of the web. This improves the quality of lamination on the entire surface of the web.
  • Printed film of suitable polymer is laminated on woven fabric surface with the help of extrusion lamination process, ultrasonic lamination or by any other suitable technique.
  • the width of laminated woven web can be fixed depending upon the size of the bag to be made.
  • the printed laminated woven web, in roll form is then taken to the bag making machine where the web roll is folded to provide overlap of the two ends, sealed by adhesive, extrusion lamination, ultrasonic sealing or any other suitable technique, to form a tubular shape.
  • the sides of the tube are folded and creased to make two side gussets of pre defined size and to represent two separate walls called as front wall and back wall.
  • the male and female parts of the zipper with or without diaphragm is stitched or fixed by using suitable adhesive or ultrasonically or any other suitable technique, with front and back wall at the top end of the bag.
  • the zipper with diaphragm acts as temper proof evidence.
  • the diaphragm is made of single or multi layer polymer film, non metalized or metalized with pr without holography, with perforation or Laser scoring, for easy opening.
  • the zipper and slider assembly facilitates re-opening and re-closing of the bag which enables the safe storage of the products.
  • the bag is attached with or without an over lap filler tape, stitched with either front wall or back wall surface, below the zipper assembly to close the inner gap of the front & back wall.
  • the stitch can be opened from one end by pulling the filler tape upwards which opens the stitched joint of front wall and back wall to open the bag mouth for pouring out the products from the bag.
  • Other end of the front wall and back wall is kept unclosed for filling and packing of the product inside the bag and thereafter closed by means of locked stitch or by sealing the inner surface of the front and back walls by heat sealing or ultrasonic sealing or any other suitable technique, at predetermined, area permanently.
  • Heat Sealing of inner surface of front & back walls may be done directly or after stitching a strip / ring of suitable polymer with the inside of front & back wall of the bag, all around, to give strong seal.
  • Figure-1 shows the front view of a side fold gusseted woven bag according to the present invention.
  • the overlap (2) sealing is done by adhesion (A) or Stitching or Extrusion lamination or Ultrasonic sealing or any other suitable technique, by folding the two ends of the laminated woven web (1) across the width.
  • the front wall (1a) and back wall (1b) are folded and creased towards center as shown (4) in this figure.
  • the folds on both sides of front and back walls form two side gussets (3a) and (3b).
  • the top of the bag is sealed by a top sealer (T) and bottom of the bag is sealed by a bottom sealer (B).
  • T top sealer
  • B bottom sealer
  • Figure- 2 shows a bag with one laminated woven front wall (1a) and one back wall (1b).
  • the laminated web is folded across the width overlapping the two ends & sealed at overlap (2) by adhesion or Stitching or Extrusion lamination or Ultrasonic sealing or any other suitable technique, of the laminated web. After two ends are sealed, the web surfaces on top & bottom represent two separate walls of the bag called as front wall (1a) and back wall (1b).
  • the bag comprises of two side gussets (3a) and (3b) folded towards inside at center (4).
  • a zipper assembly (5a) and (5b) with diaphragm (6) or without diaphragm is stitched or fixed by adhesive or ultrasonic sealing with the inside of front and back wall, across the width.
  • the stitches can be either in single row or two rows (8a) and (8b).
  • One part of the zipper is called as male part & other as female part.
  • the diaphragm is pre sealed with the zipper assembly before fixing on to the front and back wall.
  • Male part is joined with front wall & female part is joined with back wall or vice-versa, across the width.
  • a slider device (12) is used for the purpose of opening and closing the zipper assembly for re-closing and re-opening of the bag.
  • the slider movement on the zipper is blocked at both the ends of the zipper by sealing the male and female parts of the zipper together at both the ends, as shown (11a) and (11b).
  • This male and female zipper end sealing after fixing of slider on the zipper assembly can be prepared separately as subassembly for each bag as per required size.
  • the male and female parts of zipper can be stitched or joined with ultra sonic sealing with the front and back walls of the bag, all around.
  • the male & female parts of the zipper without slider & end sealing can also be stitched or joined with ultra sonic sealing with the front and back walls of the bag, all around & slider assembly & end sealing is done subsequently.
  • a pair of handles (13), depending upon the bag weight with product and if required for easy carrying and handling are fixed on the front and back wall surface, as required.
  • the other end of the bag is kept open for filling the product inside the bag and there after closing the bag by a sealing means (S1) or by a stitching means (S2).
  • Said sealing means and stitching means closed the bottom of the bag by locked stitch or by sealing the inner surface of the front and back walls by heat sealing or ultrasonic sealing or any other suitable technique, at predetermined, area permanently.
  • Heat Sealing of inner surface of front & back walls may be done directly or after stitching a strip / ring of suitable polymer with the inside of front & back wall of the bag, all around, to give strong seal.
  • Figure-3 shows the zipper assembly without diaphragm.
  • a filler tape (9) is stitched on the surface of the front or back walls of the bag to seal the bag mouth & bear the load of the product inside the bag during handling. It also acts as temper proof evidence.
  • Figure 4 shows the over lap joint (2) of two ends of the laminated woven web.
  • the laminated woven web roll is slit to the required width as per the size of the bag. Both the ends of the laminated woven web are folded, overlapping each other in such a way that it produces two walls called as front wall and back wall of the bag.
  • the overlap joint is made by adhesion or Stitching or Extrusion lamination or Ultrasonic sealing or any other suitable sealing technique, using suitable machine and applicator to achieve proper strength and quality.
  • Figure-6 shows the zipper and diaphragm assembly fixed with front and bottom walls of the bag.
  • the diaphragm is sealed with the Zipper along the length (7), prior to fixing with the bag walls.
  • the diaphragm acts as temper proof evidence.
  • a slider (12) is assembled over the male and female zipper parts for closing and opening the zipper (15).
  • the end of the male and female zipper parts along with diaphragm are sealed together to restrict the opening of the zipper at the ends, and not to allow the slider to come out from the zipper beyond the ends (11a & 11b).
  • Figure-7 shows attachment of zipper without diaphragm with front and back walls of the bag.
  • the male and female zipper parts are fixed by adhesion or Stitching or Ultrasonic sealing or any other suitable technique, with the front and back walls of the bag, across the width of the bag's one end.
  • a separate narrow polymer strip or laminate or fabric (9) is stitched on the outside surface of the front wall or back wall, at predetermined position from the end of the bag mouth. It protects the inside product not to fall down or come out beyond this closer during storage or handling. It also acts as temper proof evidence.
  • FIGS 8a, 8b and 8c show the bottom end of the bag kept open (16) for filling the product into the bag. After filling the product in the bag, the front and back walls are sealed by Adhesion or Stitching or Ultrasonic sealing or Heat sealing or any other suitable technique, to close the bag permanently.
  • Sealing of inner surface of front & back walls may be done by a stitching means (2, 23).
  • the stitching means is stitched directly or after stitching a strip / ring of suitable polymer with the inside of front & back wall of the bag, all around, to give strong seal, at a predetermined distance from the bottom end of the bag.
  • the front and back walls are sealed by a sealing means (21). When the sealing process is used on this area then the inner narrow film gets sealed to each other and closes the bag permanently at this bottom end.
  • Figure-9 is a cross sectional view which explains the fixing pattern of the zipper male and female parts (5a) and (5b), diaphragm (6), slider (12) with front and back walls (1a) and (1b).
  • the stitching / sealing point of zipper with front and back walls is shown as (8a) and (8b).
  • the filler tape is stitched with the front and back walls as shown at point (9) in the cross sectional view.
  • Figures-10A, 10B show the attachment of a tape with the woven bag and
  • Figure 1OC shows a side view of a woven bag with sealed tape.
  • One end (17) of the laminated tube is to be used for taking out the product from the bag. This is closed by polymer film / laminate tape using suitable adhesive & application method.
  • the end of the laminated tube is folded to a suitable width, twice or more times to get a narrow leak proof closing.
  • a closing means zipper and slider assembly to be attached at this end.
  • the zipper fixed at this end is accommodated within the folded gap, the slider remain at the end of the zipper, free from the folded area.
  • a tape of predefined width is used for closing the folds.
  • One end of the width of the tape is pasted / glued on the surface of the folded end (19) of the tube and the other end of the width of the tape is pasted / glued on the surface of the wall of the tube (20), as shown in fig 10B & 10C.
  • the center area (18) of the tape along the length is unsealed and comes in between the folded end and the tube surface thus remains open in that area.
  • the side view of the folded laminated tube and the sealing area is as shown in the figure 10C.
  • the advantage of this kind of seal is that it is easy to open.
  • the unsealed area of the tape is pulled upwards easily from either end which will separate the folded end of the bag from the bag wall surface.
  • the bag mouth can be opened by unfolding the folds.
  • This type of bag seal avoid the stitching and stitch removing trouble in the bags available in the prior art.
  • the opening is clean without any residual threads and also the opening ends can be easily located by visually impaired person.

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

Abstract

L'invention porte sur un sac tissé feuilleté pour emballer et stocker des produits en vrac. Le sac tissé feuilleté peut être refermable et réouvrable. Le sac fournit une preuve de manipulation non autorisée à l'aide d'un ensemble de curseur de fermeture à glissière (5a, 5b) avec un diaphragme (6) et/ou une bande de chargement (9) ou une bande scellée. Une bande ou un stratifié ou un tissu en polymère étroit séparé est cousu sur la surface intérieure de la paroi avant et de la paroi arrière, en une position prédéterminée à partir de l'extrémité inférieure du sac. Les surfaces opposées de cet anneau de bande sont scellées par un dispositif de scellement thermique afin de fermer l'extrémité inférieure du sac. Une poignée (13) est fixée au sac pour porter facilement le sac. L'invention porte également sur un procédé de réalisation d'un sac tissé feuilleté. Le sac est réalisé à partir d'un film tissé feuilleté s'étendant de façon continue et non à partir d'un tube tissé. Dans le cas d'une forme de film, une surface de 100 % peut être feuilletée d'un bord à l'autre du film, sur la largeur. Ceci améliore la qualité de feuilletage sur la totalité de la surface du film.
PCT/IN2007/000468 2007-07-30 2007-10-08 Sac tissé feuilleté et procédé de fabrication d'un sac tissé feuilleté WO2009016644A1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
IN1602DE2007 2007-07-30
IN1602/DEL/2007 2007-07-30

Publications (1)

Publication Number Publication Date
WO2009016644A1 true WO2009016644A1 (fr) 2009-02-05

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Family Applications (1)

Application Number Title Priority Date Filing Date
PCT/IN2007/000468 WO2009016644A1 (fr) 2007-07-30 2007-10-08 Sac tissé feuilleté et procédé de fabrication d'un sac tissé feuilleté

Country Status (1)

Country Link
WO (1) WO2009016644A1 (fr)

Cited By (14)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US20090263048A1 (en) * 2008-04-16 2009-10-22 Iannelli Ii Michael Louis Bag Structures And Methods Of Assembling The Same
WO2010122579A1 (fr) * 2009-04-22 2010-10-28 Ashok Chaturvedi Sac en tissu tissé à ruban polymère et son procédé de fabrication
WO2011111062A1 (fr) * 2010-03-09 2011-09-15 Ashok Chaturvedi Structure inviolable, son procédé de fabrication et emballage inviolable comprenant ladite structure
WO2014059283A1 (fr) * 2012-10-12 2014-04-17 Polytex Fibers Corporation Sac polymère à éléments d' accès facile reliés au sac sans adhésifs
US9669983B2 (en) 2014-04-04 2017-06-06 Polytex Fibers Corporation Woven plastic bags with features that reduce leakage, breakage and infestations
US9845184B2 (en) 2012-02-13 2017-12-19 Polytex Fibers Corporation Easy open plastic bags
US9926106B2 (en) 2013-01-22 2018-03-27 Polytex Fibers Corporation Easy access woven plastic bags
US9969529B2 (en) 2012-02-13 2018-05-15 Polytex Fibers Corporation Easy open plastic bags
US10562689B2 (en) 2012-02-13 2020-02-18 Polytex Fibers Corporation Woven plastic bags with features that reduce leakage, breakage and infestations
US10661963B2 (en) 2014-04-04 2020-05-26 Polytex Fibers Corporation Peelable easy open plastic bags
US10913587B2 (en) 2012-02-13 2021-02-09 Polytex Fibers Corporation Easy open plastic bags
US11305927B2 (en) 2014-04-04 2022-04-19 Polytex Fibers Llc Easy open plastic bags
US11459157B2 (en) 2012-02-13 2022-10-04 Polytex Fibers Llc Woven plastic bags with features that reduce leakage, breakage and infestations
US11472622B2 (en) 2014-04-04 2022-10-18 Polytex Fibers Llc Woven plastic bags with features that reduce leakage, breakage, and infestations

Citations (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4834552A (en) * 1988-03-23 1989-05-30 Makowka Kenneth R Tamper-evident seal for envelope and method of making same
US5035517A (en) * 1989-03-17 1991-07-30 Kcl Corporation Reclosable shipping sack
US20020068669A1 (en) * 2000-12-05 2002-06-06 Soon-Keun Ahn Waterproof bags and method of producing waterproof bags
US20040091648A1 (en) * 2002-11-08 2004-05-13 Mark Hartzell Multiwall bag having slider zipper and fin combination and associated methods
US20050084185A1 (en) * 2003-10-15 2005-04-21 Moon Byung J. Synthetic resin bag for grain or feed
WO2005113357A1 (fr) * 2004-05-21 2005-12-01 Ashok Chaturvedi Emballage flexible refermable et procede de fabrication associe
US20070066470A1 (en) * 2005-09-21 2007-03-22 Eads Claude A Method for applying a reclosable seal to a container

Patent Citations (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4834552A (en) * 1988-03-23 1989-05-30 Makowka Kenneth R Tamper-evident seal for envelope and method of making same
US5035517A (en) * 1989-03-17 1991-07-30 Kcl Corporation Reclosable shipping sack
US20020068669A1 (en) * 2000-12-05 2002-06-06 Soon-Keun Ahn Waterproof bags and method of producing waterproof bags
US20040091648A1 (en) * 2002-11-08 2004-05-13 Mark Hartzell Multiwall bag having slider zipper and fin combination and associated methods
US20050084185A1 (en) * 2003-10-15 2005-04-21 Moon Byung J. Synthetic resin bag for grain or feed
WO2005113357A1 (fr) * 2004-05-21 2005-12-01 Ashok Chaturvedi Emballage flexible refermable et procede de fabrication associe
US20070066470A1 (en) * 2005-09-21 2007-03-22 Eads Claude A Method for applying a reclosable seal to a container

Cited By (24)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US20090263048A1 (en) * 2008-04-16 2009-10-22 Iannelli Ii Michael Louis Bag Structures And Methods Of Assembling The Same
WO2010122579A1 (fr) * 2009-04-22 2010-10-28 Ashok Chaturvedi Sac en tissu tissé à ruban polymère et son procédé de fabrication
US9540146B2 (en) 2010-03-09 2017-01-10 Ashok Chaturvedi Tamper evident structure, method for making such a structure, and tamper evident package comprising such a structure
WO2011111062A1 (fr) * 2010-03-09 2011-09-15 Ashok Chaturvedi Structure inviolable, son procédé de fabrication et emballage inviolable comprenant ladite structure
US10562689B2 (en) 2012-02-13 2020-02-18 Polytex Fibers Corporation Woven plastic bags with features that reduce leakage, breakage and infestations
US11597573B2 (en) 2012-02-13 2023-03-07 Polytex Fibers Llc Peelable easy open plastic bags
US11027888B2 (en) 2012-02-13 2021-06-08 Polytex Fibers Corporation Easy open plastic bags
US9845184B2 (en) 2012-02-13 2017-12-19 Polytex Fibers Corporation Easy open plastic bags
US10913587B2 (en) 2012-02-13 2021-02-09 Polytex Fibers Corporation Easy open plastic bags
US9969529B2 (en) 2012-02-13 2018-05-15 Polytex Fibers Corporation Easy open plastic bags
US11897660B2 (en) 2012-02-13 2024-02-13 Polytex Fibers Llc Easy open plastic bags
US11459157B2 (en) 2012-02-13 2022-10-04 Polytex Fibers Llc Woven plastic bags with features that reduce leakage, breakage and infestations
US10766667B2 (en) 2012-02-13 2020-09-08 Polytex Fibers Corporation Easy open plastic bags
WO2014059283A1 (fr) * 2012-10-12 2014-04-17 Polytex Fibers Corporation Sac polymère à éléments d' accès facile reliés au sac sans adhésifs
US10287062B2 (en) 2012-10-12 2019-05-14 Polytex Fibers Corporation Polymeric bags with easy access features attached to the bags without adhesives
US9731868B2 (en) 2012-10-12 2017-08-15 Polytex Fibers Corporation Polymeric bags with easy access features attached to the bags without adhesives
US10676242B2 (en) 2013-01-22 2020-06-09 Polytex Fibers Corporation Easy access woven plastic bags
US9926106B2 (en) 2013-01-22 2018-03-27 Polytex Fibers Corporation Easy access woven plastic bags
US11472604B2 (en) 2013-01-22 2022-10-18 Polytex Fibers Llc Easy access woven plastic bags
US10661963B2 (en) 2014-04-04 2020-05-26 Polytex Fibers Corporation Peelable easy open plastic bags
US11305927B2 (en) 2014-04-04 2022-04-19 Polytex Fibers Llc Easy open plastic bags
US11472622B2 (en) 2014-04-04 2022-10-18 Polytex Fibers Llc Woven plastic bags with features that reduce leakage, breakage, and infestations
US10759585B2 (en) 2014-04-04 2020-09-01 Polytex Fibers Corporation Woven plastic bags with features that reduce leakage, breakage and infestations
US9669983B2 (en) 2014-04-04 2017-06-06 Polytex Fibers Corporation Woven plastic bags with features that reduce leakage, breakage and infestations

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