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WO2002046063A1 - Enveloppe protectrice de produits agricoles - Google Patents

Enveloppe protectrice de produits agricoles Download PDF

Info

Publication number
WO2002046063A1
WO2002046063A1 PCT/US2000/042735 US0042735W WO0246063A1 WO 2002046063 A1 WO2002046063 A1 WO 2002046063A1 US 0042735 W US0042735 W US 0042735W WO 0246063 A1 WO0246063 A1 WO 0246063A1
Authority
WO
WIPO (PCT)
Prior art keywords
nonwoven fabric
agricultural products
protective cover
accordance
fibrous
Prior art date
Application number
PCT/US2000/042735
Other languages
English (en)
Inventor
Jeanett S. Vasquez
Carlos Sanchez
Luis F. Rodriguez
Jorge A. Santisteban
Original Assignee
Polymer Group, Inc.
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 Polymer Group, Inc. filed Critical Polymer Group, Inc.
Priority to PCT/US2000/042735 priority Critical patent/WO2002046063A1/fr
Priority to BR0017381-9A priority patent/BR0017381A/pt
Priority to AU4715401A priority patent/AU4715401A/xx
Priority to AU2001247154A priority patent/AU2001247154B2/en
Priority to MXPA03005090A priority patent/MXPA03005090A/es
Priority to US10/433,937 priority patent/US20040062892A1/en
Publication of WO2002046063A1 publication Critical patent/WO2002046063A1/fr

Links

Classifications

    • A—HUMAN NECESSITIES
    • A01—AGRICULTURE; FORESTRY; ANIMAL HUSBANDRY; HUNTING; TRAPPING; FISHING
    • A01G—HORTICULTURE; CULTIVATION OF VEGETABLES, FLOWERS, RICE, FRUIT, VINES, HOPS OR SEAWEED; FORESTRY; WATERING
    • A01G13/00—Protection of plants
    • A01G13/20—Protective coverings for plants
    • A01G13/27—Protective coverings for plants protecting specific parts of plants, e.g. roots, trunks or fruits

Definitions

  • the present invention relates generally to an arrangement for protecting agricultural products, including protection of the products prior to harvesting, and more particularly to a generally tubular protective cover for agricultural products formed from nonwoven fabric to protect the product against dust and insects, while permitting disposable use of the cover.
  • tubular polyethylene films have been employed for protection of crops such as bananas, but experience has shown that these types of protective covers can be less than satisfactory.
  • perforated polyethylene films In order to allow moisture to evaporate away from the agricultural products (which, in the case of bananas, can otherwise cause staining, and promote growth of fungi and the like), perforated polyethylene films have typically been used. However, the perforations can undesirably compromise the protection afforded by the covers, permitting ingress of dust and other contaminants.
  • PCT Publication No. WO98/51578 is directed to a bag-like cover for agricultural products, with the construction formed from cellulosic paper.
  • the present invention provides an improved form of protective cover for agricultural products which is particularly suited for use prior to harvest of the products, and which is configured for economical, disposable use.
  • a protective cover embodying the principles of the present invention is configured for protection of agricultural products, including products that have not yet been harvested, such as bananas.
  • the protective cover has a tubular configuration sized to permit the cover to be positioned generally about an associated agricultural product, whereby the product is substantially enclosed.
  • the cover comprises a fibrous nonwoven fabric formed from fibrous and/or filamentary elements, with the fibrous nonwoven fabric exhibiting sufficient vapor permeability to permit transmission of gasses through the cover, while retarding passage of dust and insects, thus protecting the agricultural products against potentially detrimental environmental conditions.
  • the fibrous nonwoven fabric of the cover comprises fibrous material selected from the group consisting of thermoplastic polymers, thermoset polymers, natural fibers, and combinations thereof.
  • the fibrous material of the nonwoven fabric can be heat-bonded, adhesive-bonded, or hydroentangled (spunlaced) to provide the fabric with the desired degree of integrity.
  • the fibrous nonwoven fabric may be formed from filamentary elements by providing the fabric in the form of spunbond polymeric material.
  • the protective cover of the present invention can be provided with additional features to facilitate its effective use for protection of agricultural products. If desired, the nonwoven fabric may comprise a reinforcing scrim, which may be integrated into the fabric by hydroentanglement.
  • the polymeric material may incorporate one or more protection enhancing agents selected from the group consisting of insecticidal, fungicidal, algaecidal, decay-inhibiting, and UN-protected, agents.
  • protection-enhancing agents can be provided in the form of a melt-additive in the polymer, as a fiber surface treatment, and/or as a topical treatment applied to the nonwoven fabric. Pigmenting agents may also be employed.
  • a method of protecting agricultural products in accordance with the present invention comprises the steps of providing at least one piece of nonwoven fabric formed from fibrous and/or filamentary elements, and forming a tube from the nonwoven fabric by joining together edge portions thereof.
  • the present method further includes cutting the tube to a selected length to form a protective cover, and positioning the protective cover generally about an agricultural product to protect the product from dust and/or insects.
  • the nonwoven fabric may comprise heat-bonded polymeric staple length fibers, or adhesive-bonded fibrous material. When the fabric is formed from spunbond polymeric material, the fabric comprises substantially continuous polymeric filaments.
  • the nonwoven fabric employed in the protective cover of the present invention can, for some applications, be non-apertured, with the fabric itself providing the desired breathability or vapor permeability.
  • the resultant laminate structure can be apertured to provide the desired vapor permeability.
  • FIGURE 1 is a diagrammatic view of a forming apparatus for forming a nonwoven fabric for use as a protective cover for agricultural products in accordance with the principles of the present invention
  • FIGURE 2 is a diagrammatic view of a hydroentangling forming surface for formation of a nonwoven fabric for use in practicing the present invention
  • FIGURE 3 is a diagrammatic view of a forming surface for forming a nonwoven fabric for use in practicing the present invention
  • FIGURES 3A-3C are diagrammatic views of a further forming surface for hydroentangling a nonwoven fabric for practice of the present invention.
  • FIGURES 4 A and 4B are veins illustrating embodiments of the present protective cover in use on unharvested bananas. Detailed Description
  • the present invention is directed to a protective cover for agricultural products which is particularly suited for use on the products prior to harvest, such as for protection of bananas as they are cultivated.
  • a protective cover for agricultural products which is particularly suited for use on the products prior to harvest, such as for protection of bananas as they are cultivated.
  • dust which may include volcanic ash
  • insects while at the same time providing vapor permeability or breathability to assure that the agricultural products mature and ripen in the intended fashion.
  • the protective cover embodying the principles of the present invention is provided in a generally tubular configuration sized to permit the cover to be positioned generally about an associated agricultural product.
  • the cover comprises a fibrous nonwoven fabric formed from fibrous and/or filamentary elements.
  • the fibrous nonwoven fabric is selected to exhibit sufficient vapor permeability to permit transmission of gasses through the cover, while retarding passage of dust and insects.
  • the fibrous nonwoven fabric comprises fibrous material selected from the group consisting of thermoplastic polymers, thermoset polymers, natural fibers, and combinations thereof.
  • the fibrous nonwoven fabric may be formed from filamentary elements when the fabric is provided in the form of a spunbond polymeric material.
  • the nonwoven fabric preferably has a basis weight from about 10 to 85 gr/m 2 , and in one especially preferred form, comprises polypropylene staple length fibers that are heat-bonded.
  • the present protective cover can be differently configured to facilitate its cost-effective use for protection of agricultural products. For some applications, it can be desired to incorporate a reinforcing scrim in the fabric, with formation of the fibrous nonwoven fabric by hydroentanglement (spunlacing) facilitating incorporation of such a scrim. While it is contemplated that the nonwoven fabric may be non-apertured, for some applications, it can be desirable to apply a polymeric film layer to the nonwoven fabric, with the cover being apertured to provide the desired vapor permeability.
  • the fibrous nonwoven fabric may comprise polymeric material incorporating one or more protection-enhancing agents selected from the group consisting of insecticidal, fungicidal, algaecidal, decay-inhibiting, and UV- protective agents. Agents of this type are disclosed in U.S. Patents No. 5,641,499, No. 5,827,522, No. 6,015,570, and No. 6,103,750, all hereby incorporated by reference. It is also contemplated that the polymeric material of the fabric may comprise a pigmenting agent.
  • the protection-enhancing agents may be provided in the form of a melt-additive in the polymer from which the nonwoven fabric is formed, or may comprise a fiber surface treatment applied to the fibrous material from which the fabric is formed, prior to fabric formation. It is within the purview of the present invention that one or more of the protection- enhancing agents may comprise a topical treatment applied to the nonwoven fabric after it is formed.
  • Example 1 Thermal Bonded Carded Staple Fiber
  • the present protective cover was formed from nonwoven fabric comprised of a conventional carded staple length polypropylene fiber of 9.0 denier by 2.0 inch staple length. The basis weight of the carded lap was 45 grams per square meter.
  • the carded batt was thermally bonded by calender nip at a pressure of 450 pounds per linear inch, a calender anvil roll surface temperature of 300°F to 310°F, a calender embossing roll surface temperature of 300°F to 310°F, and a point pattern of 9% bond area relative to total surface area.
  • the overall line speed for manufacturing the representative nonwoven fabric was approximately 400 feet per minute.
  • the fabric was formed into a tube for formation of the present protective cover.
  • Example 2 Spunbond Filamentary Elements
  • a bonded precursor web may be produced on a commercial spunbond production line using standard processing conditions.
  • a polyester filament precursor web may be employed having a basis weight of 20 grams per square meter, and a filament denier of 1.8.
  • the precursor web is bonded by calender at a calender temperature of 200 to 220 degrees C, and a nip pressure of 320 PLI.
  • the spunbond web was formed into a tube for formation of the present protective cover.
  • FIGURE 1 illustrates a hydroentangling apparatus for forming nonwoven fabrics in accordance with the present invention.
  • the apparatus includes a foraminous forming surface in the form of belt 12 upon which the precursor fibrous batt P is positioned for pre-entangling by entangling manifold 14 including a plurality of sub-manifolds.
  • each of the sub-manifolds of the entangling manifolds 14 included three orifice strips including 120 micron orifices spaced at 42.3 per inch, with three of the sub-manifolds successively operated at 100, 300, and 600 pounds per square inch, with a line speed of 45 feet per minute.
  • the precursor web was then dried using two stacks of steam drying cans at 300°F.
  • the precursor web had a basis weight of 1.5 ounce per square yard (plus or minus 7%).
  • the precursor web the received a further 2.0 ounce per square yard air- laid layer of Type-472 PET fibrous batt.
  • the precursor web -with fibrous batt was further entangled by a series of entangling sub-manifolds, with the sub- manifolds successively operated at 100, 300, and 600 pounds per square inch, with a line speed of 45 feet per minute.
  • the entangling apparatus of FIGURE 1 further includes an imaging drum 18 comprising a three-dimensional image transfer device for effecting imaging of the now-entangled layered precursor web.
  • the image transfer device includes a moveable imaging surface which moves relative to a plurality of entangling manifolds 22 which act in cooperation with three-dimensional elements defined by the imaging surface of the image transfer device to effect imaging and patterning of the fabric being formed.
  • the entangling manifolds 22 included 120 micron orifices spaced at 42.3 per inch, with the manifolds operated at 2800 pounds per square inch each.
  • the imaged nonwoven fabric was dried using two stacks of steam drying cans at 300°F.
  • the three-dimensional image transfer device of drum 18 was configured with an image forming surface consisting of non-aperturing inducing pattern, as illustrated in FIGURES 3, and 3A-3C.
  • a fabric was fabricated by the process of the above example, whereby in the alternative, drum 18 was configured with an image forming surface consisting of an aperture inducing pattern, as illustrated in FIGURE 2.
  • Example 5 Non- Apertured Spunlace with Scrim A composite nonwoven fabric was formed with the arrangement of FIGURE 1, wherein the imaging device 18 had an "octagon/square" imaging surface such as is illustrated in FIGURES 3 and 3A-3C.
  • the entangled layer was produced using 1.5 denier polyester staple fibers at 1.5 inch staple length which were carded, cross-lapped and entangled using a Perfojet 2000 Jetlace entangler.
  • the polyester scrim layer 16 was a 7 x 5 mesh, 70 denier scrim available from Conwed Plastics of Minneapolis, Minnesota.
  • a thermally bonded, 2.0 denier polyester thermally bonded fibrous layer was used as the bonded layer 20, with a 50 gsm target basis weight.
  • the fibrous layers were unwound at 40 feet per minute and impinged with three successive manifolds 22 each operating at 4000-psi pressure.
  • Each manifold 22 had 120-micron diameter orifices spaced at 42.3 orifices per inch.
  • a base material was supplied in the form of a prewound roll of 85 gram per square meter (gsm) spunbond polypropylene having been previously hot calendered with a 14% land area pattern..
  • a co-polyester film extrusion was applied by the use of a five zone extruder system.
  • the co- polyester polymer blend was comprised of an ethyl methyl acrylate at 65% (w/w) and a co-polyester polymer at 35% (w/w).
  • the five zone extruder was operated with each successive zone at 350° F., 450° F., 485° F., 525° F., and 515° F.
  • the melt temperature of the molten film extrusion was 477° F.
  • the cast station temperatures were 80° F. for the nip roll, 65° F. for the cast roll, and 70°
  • the cast station roll pressures were 75 pounds per square inch for the nip roll and 60 pounds per square inch for the stripper roll. Overall line speed during the processing of this material was 51 feet per minute.
  • Example 7 Mechanical Compaction of Nonwoven Fabric Nonwoven fabrics may be further treated by mechanical compaction should the protective article require enhanced conformability.
  • the fabric may be subjected to slight mechanical compaction, such as by sanforizing (Sanforized® is a registered trademark of Cluett, Peabody & Co.,
  • the nonwoven fabric used for the present invention can be subjected to mechanical compaction by a microcreping process.
  • the particular microcreping process employed was that as is commercially available from the Micrex Corporation of Walpole, Massachusetts, and is referred to by the registered mark of the same company as "MICREX".
  • the apparatus for performing MICREXING is described in U.S. patents 3,260,778; 3,416,192; 3,810,280, 4,090,385; and 4,717,329, hereby incorporated by reference.
  • a means for imparting pressure applies a predetermined amount of pressure through a substructure, and extending across the path of a continuously supplied sheet of nonwoven fabric.
  • the nonwoven fabric is carried by a rotating drive roll on which the pressure is imparted through the nonwoven fabric and against the rotating drive roll. While the nonwoven fabric is under applied pressure it then further impinges upon a retarding surface. This retarding surface in combination with the applied pressure induces the fabric into a creped form, with a resulting distortion of constituent fibrous components out of the planar aspect of the original nonwoven fabric.

Landscapes

  • Health & Medical Sciences (AREA)
  • General Health & Medical Sciences (AREA)
  • Toxicology (AREA)
  • Life Sciences & Earth Sciences (AREA)
  • Environmental Sciences (AREA)
  • Laminated Bodies (AREA)
  • Nonwoven Fabrics (AREA)

Abstract

Cette enveloppe protectrice de produits agricoles se compose d'un tissu nontissé, fibreux, suffisamment perméable à la vapeur d'eau pour permettre le passage des gaz à travers la couverture tout en retardant le passage de la poussière et des insectes. Cette enveloppe protectrice est dotée d'une configuration tubulaire dimensionnée pour lui permettre d'être positionnée généralement autour des produits agricoles concernés, et elle est notamment conçue pour être utilisée sur des produits, tels que des bananes, avant la récolte de celles-ci. Cette enveloppe peut être formée à partir d'éléments fibreux et/ou filamenteux, les éléments fibreux pouvant être choisis dans le groupe constitué par des polymères thermoplastiques, des polymères thermodurcissants, des fibres naturelles, et des combinaisons de ceux-ci. En outre, ce nontissé peut être formé à l'aide d'agents augmentant la protection des produits agricoles, tels que des agents insecticides, fongicides, algicides, inhibiteurs de décomposition, et agents de protection contre les ultraviolets, et il peut être pigmenté, selon les besoins.
PCT/US2000/042735 2000-12-08 2000-12-08 Enveloppe protectrice de produits agricoles WO2002046063A1 (fr)

Priority Applications (6)

Application Number Priority Date Filing Date Title
PCT/US2000/042735 WO2002046063A1 (fr) 2000-12-08 2000-12-08 Enveloppe protectrice de produits agricoles
BR0017381-9A BR0017381A (pt) 2000-12-08 2000-12-08 Revestimento protetor para produtos agrìcolas, e processo para proteção de produtos agrìcolas
AU4715401A AU4715401A (en) 2000-12-08 2000-12-08 Protective cover for agricultural products
AU2001247154A AU2001247154B2 (en) 2000-12-08 2000-12-08 Protective cover for agricultural products
MXPA03005090A MXPA03005090A (es) 2000-12-08 2000-12-08 Cubierta protectora para productos agricolas.
US10/433,937 US20040062892A1 (en) 2000-12-08 2000-12-08 Protective cover for agricultural products

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
PCT/US2000/042735 WO2002046063A1 (fr) 2000-12-08 2000-12-08 Enveloppe protectrice de produits agricoles

Publications (1)

Publication Number Publication Date
WO2002046063A1 true WO2002046063A1 (fr) 2002-06-13

Family

ID=21742220

Family Applications (1)

Application Number Title Priority Date Filing Date
PCT/US2000/042735 WO2002046063A1 (fr) 2000-12-08 2000-12-08 Enveloppe protectrice de produits agricoles

Country Status (4)

Country Link
AU (2) AU4715401A (fr)
BR (1) BR0017381A (fr)
MX (1) MXPA03005090A (fr)
WO (1) WO2002046063A1 (fr)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2004035131A3 (fr) * 2002-10-18 2004-06-03 Makhteshim Chem Works Ltd Procede et revetement pour proteger des plantes cultivees
EP1476362A4 (fr) * 2002-02-22 2008-01-02 Polymer Group Inc Couvercle de protection de maturation controlee destine a des produits agricoles

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN113536048A (zh) * 2021-06-29 2021-10-22 北京明略软件系统有限公司 图谱展示方法、系统、存储介质及电子设备

Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US5224598A (en) * 1992-03-13 1993-07-06 Home Environmental Products, Inc. Plant package
US5690949A (en) * 1991-10-18 1997-11-25 Minnesota Mining And Manufacturing Company Microporous membrane material for preventing transmission of viral pathogens
US5883026A (en) * 1997-02-27 1999-03-16 Kimberly-Clark Worldwide, Inc. Face masks including a spunbonded/meltblown/spunbonded laminate

Family Cites Families (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4646467A (en) * 1985-07-18 1987-03-03 Morrisroe John P Weather resistant cover bag for dormant plants
ZA965786B (en) * 1995-07-19 1997-01-27 Kimberly Clark Co Nonwoven barrier and method of making the same
US6088953A (en) * 1998-02-20 2000-07-18 Morgan; Wayne Collapsible protective plant cover

Patent Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US5690949A (en) * 1991-10-18 1997-11-25 Minnesota Mining And Manufacturing Company Microporous membrane material for preventing transmission of viral pathogens
US5224598A (en) * 1992-03-13 1993-07-06 Home Environmental Products, Inc. Plant package
US5883026A (en) * 1997-02-27 1999-03-16 Kimberly-Clark Worldwide, Inc. Face masks including a spunbonded/meltblown/spunbonded laminate

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP1476362A4 (fr) * 2002-02-22 2008-01-02 Polymer Group Inc Couvercle de protection de maturation controlee destine a des produits agricoles
WO2004035131A3 (fr) * 2002-10-18 2004-06-03 Makhteshim Chem Works Ltd Procede et revetement pour proteger des plantes cultivees

Also Published As

Publication number Publication date
BR0017381A (pt) 2004-06-22
MXPA03005090A (es) 2005-02-25
AU4715401A (en) 2002-06-18
AU2001247154B2 (en) 2007-07-19

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