GB2439727A - Flexible packaging material - Google Patents

Flexible packaging material Download PDF

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Publication number
GB2439727A
GB2439727A GB0613175A GB0613175A GB2439727A GB 2439727 A GB2439727 A GB 2439727A GB 0613175 A GB0613175 A GB 0613175A GB 0613175 A GB0613175 A GB 0613175A GB 2439727 A GB2439727 A GB 2439727A
Authority
GB
United Kingdom
Prior art keywords
flexible packaging
packaging material
rollers
layer
overlayer
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.)
Withdrawn
Application number
GB0613175A
Other versions
GB0613175D0 (en
Inventor
Jason Morley Helps
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
ZEAL CLEAN SUPPLIES Ltd
Original Assignee
ZEAL CLEAN SUPPLIES Ltd
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 ZEAL CLEAN SUPPLIES Ltd filed Critical ZEAL CLEAN SUPPLIES Ltd
Priority to GB0613175A priority Critical patent/GB2439727A/en
Publication of GB0613175D0 publication Critical patent/GB0613175D0/en
Publication of GB2439727A publication Critical patent/GB2439727A/en
Withdrawn legal-status Critical Current

Links

Classifications

    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B32—LAYERED PRODUCTS
    • B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
    • B32B27/00—Layered products comprising a layer of synthetic resin
    • B32B27/06—Layered products comprising a layer of synthetic resin as the main or only constituent of a layer, which is next to another layer of the same or of a different material
    • B32B27/08—Layered products comprising a layer of synthetic resin as the main or only constituent of a layer, which is next to another layer of the same or of a different material of synthetic resin
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B32—LAYERED PRODUCTS
    • B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
    • B32B27/00—Layered products comprising a layer of synthetic resin
    • B32B27/32—Layered products comprising a layer of synthetic resin comprising polyolefins
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B32—LAYERED PRODUCTS
    • B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
    • B32B27/00—Layered products comprising a layer of synthetic resin
    • B32B27/36—Layered products comprising a layer of synthetic resin comprising polyesters
    • 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
    • B65D65/00—Wrappers or flexible covers; Packaging materials of special type or form
    • B65D65/38—Packaging materials of special type or form
    • B65D65/40—Applications of laminates for particular packaging purposes
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B32—LAYERED PRODUCTS
    • B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
    • B32B2255/00—Coating on the layer surface
    • B32B2255/10—Coating on the layer surface on synthetic resin layer or on natural or synthetic rubber layer
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B32—LAYERED PRODUCTS
    • B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
    • B32B2255/00—Coating on the layer surface
    • B32B2255/20—Inorganic coating
    • B32B2255/205—Metallic coating
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B32—LAYERED PRODUCTS
    • B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
    • B32B2307/00—Properties of the layers or laminate
    • B32B2307/40—Properties of the layers or laminate having particular optical properties
    • B32B2307/412—Transparent
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B32—LAYERED PRODUCTS
    • B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
    • B32B2311/00—Metals, their alloys or their compounds
    • B32B2311/24—Aluminium
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B32—LAYERED PRODUCTS
    • B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
    • B32B2313/00—Elements other than metals
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B32—LAYERED PRODUCTS
    • B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
    • B32B2323/00—Polyalkenes
    • B32B2323/04—Polyethylene
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B32—LAYERED PRODUCTS
    • B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
    • B32B2367/00—Polyesters, e.g. PET, i.e. polyethylene terephthalate
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B32—LAYERED PRODUCTS
    • B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
    • B32B2439/00—Containers; Receptacles
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B32—LAYERED PRODUCTS
    • B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
    • B32B2439/00—Containers; Receptacles
    • B32B2439/40—Closed containers
    • B32B2439/46—Bags

Landscapes

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

Abstract

Flexible packaging material which may be in the form of bags comprises a first layer of polyethylene and at least one overlayer of substantially impervious film applied thereto such as aluminium or silicon oxide coated polyester. Tie layers such as low-melt polyethylene maybe present. Laminating plant 1 for its manufacture may comprise a pair of cooperating laminating pressure rollers 2, 3, a first feed roller 4, upper feed rollers 5, 6, 7, 8 and lower feed rollers 9, 10, 11, 12. A conversion unit 13 is disposed downstream of the rollers 2, 3. A first layer 14 of polyethylene film material in flattened tubular form is carried by the first or unwind feed roller 4. Overlayers 15, 16, 17, 18 of aluminium oxide coated polyester film material are carried by the upper feed or unwind rollers 5, 6, 7, 8. Further overlayers 20, 21, 22, 23 of the same film material are carried by the lower feed or unwind rollers 9, 10, 11, 12. The coopering pressure rollers 2, 3, together define a nip 25. These rollers may 15 be heated, in order to assist combination of the layers 14 to 18, and 20 to 23. The unit 13 applies heat seals to the laminate emerging from the rollers 2, 3, and cuts the laminate into discrete lengths.

Description

<p>FLEXIBLE PACKAGING MATEpj This invention relates to flexible packaging
material and comprises material Which may take the form of bags.</p>
<p>S</p>
<p>According to the inVention, flexible packaging material is of laminated form and comprises a first layer of po!yethylme film and at least one subsequent overlayer of substantially impervious film applied thereto.</p>
<p>The substantially impervious film preferably compri alumjn oxide coated Polyester.</p>
<p>The first and subsequent layer(s) are preferably transpart.</p>
<p>The first layer is preferably Of tubular form.</p>
<p>The inVention also comprises a method of manu1cUg flexible packaging material of laminated form, comprising simultaneously passing a first layer of polyethylene film together with at lease one overlayer of substanialIy impervious film of plastics material through the nip of a pair of lannnatj rollers so that cohesion occurs between the first layer and overlayer(s) The first layer is preferably of tubular form.</p>
<p>The invention further comprises flexible packaging material manufap according to the method set forth in the penultimate paragraph.</p>
<p>The various aspects of the present invention will now be descrjbj by way of example only, with referenee to the accompanyug drawings, wherein:..</p>
<p>Figure 1 is a side view of a lamination plant, and Figure 2 is a enlarged side view, in section, an alternative form of flexible packaging material.</p>
<p>F1exibe Pacbiistg MataiaJ With reference to the Figure 1, a lamination plant I comprises a pair of cooperating laminating pressure rollers 2, 3, a first feed roller 4, upper feed rollers 5, 6, 7, 8 and lower feed rollers 9, 10, 11, 12. A conversion unit 13 is disposed downstream of the rollers 2,3.</p>
<p>A first layer 14 of polyethylene film material is carried by the first or unwind feed roller 4. Overlayers 15, 16, 17, 18 of aluminium oxide coated polyester film material are carried by the upper feed or unwind rollers 5, 6, 7, 8. Further overlayers 20,21,22,23 of the same film material are carned by the lower feed or unwind rollers 9, 10, 11, 12.</p>
<p>The co-operating pressure rollers 2, 3, together define a nip 25. These rollers may be heated, in order to assist cohesion of the layer 14 to 18, and 20 to 23.</p>
<p>The first layer 14 is of flattened, tubular, form. The alwnjnjuni oxide coated overlayers 15 to 18 and 20 to 23 comprise barriers substantially impervious to moisture and gasses.</p>
<p>As an alternative to aluminium oxide coated polyethylene, as a barrier material, silicon oxide coated polyester may be used, but the barrier properties of this alternative are not as good.</p>
<p>The polyethylene tube 14 is manufactured within a high class cleanroom facility so as to result in an internal, product contact surface with substantiajy no particulate or chemical contaminants which could corrupt or contaminate very sensitive packaging contents.</p>
<p>The aluminium oxide coated overlayers 15 to 18 and 20 to 23 are themselves coated with a low-melt polyethylene tie-layer of about 12 micron thickness.</p>
<p>These tie layers being low-melt deposits, allow the overlayers 15 to 18 and 20 to 23 to be laminated to the inner polyethylene tube 14, under a combination of heat and pressure thus assisting cohesion, without the opposed flattened portions of the tube itself becoming laminated to each other.</p>
<p>Flexible Packaging Material The overlayers 15 to 18 and 20 to 23 overlap the flattened tube 14.</p>
<p>In operation, the pressure rollers 2,3, are rotated, so as to draw the layers 14 to I8 and 20 to 23 th oug the nip 25 between the rollers in ord tot' th layers together to form a lamination 26, which is then passed through the unit 13 where the lamination 26passes in-line as heat sealing is applied along the length of lamination 26 as well as at spaced intervals across it. The unit 13 also houses a cutter which cuts the lamination 26 both along its length and at the said intervals across it whereby the laminztion 26 emerges from the unit 13 as individual packaging bags 27.</p>
<p>The bags 27 are subsequently sealed after contents have been inserted.</p>
<p>The bags 27 have various advantages, namely-a) Transparency -to allow reading of a bar code which maybe applied to the contents of the bags.</p>
<p>b) Clean intenors -which avoid contamination of bag contents.</p>
<p>c) High level of barrier to, in particular, moisture, which may corrode and corrupt bag contents.</p>
<p>The number of overlayer films depends on requirements, In some cases only one overlayer (each side of flattened tube 14) may be needed. When a non-tubular first layer is used, only one overlayer (applied to one side) may be employed, Figure 2 shows this arrangement where a first layer 30 comprising polyethylene film of single thickness has an overlayer 31 of aluminium oxide polyester film applied thereto to form a barrier layer.</p>
<p>The layers 30, 31 lamination provides flexible packaging material 32 of sheet form.</p>
<p>Examples of layer thicknesses are as follows: Flezible Packaging Matenal First layer 14-tube wall thickness 70 microns.</p>
<p>Overlayers 15 to 18 and 20 to 23 are of3 microns thickness.</p>
<p>The lamination 30, 31 may employ one or more tie layers, as described above with reference to Figure 1.</p>
<p>Flexible Packaging Material</p>

Claims (1)

  1. <p>CLAIMS</p>
    <p>1. Flexible packaging material of laminated form, comprising a first layer of polyethylene film, and at least one overlayer of substantially impervious film applied thereto.</p>
    <p>2. Flexible packaging material as claimed in Claim I, wherein the first layer is of tubular form.</p>
    <p>3. Flexible packaging material as claimed in Claim 1, wherein the first layer is of single thickness.</p>
    <p>4. Flexible packaging material as claimed in Claim 1, 2 or 3, wherein the substantially impervious film comprises aluminium coated polyester.</p>
    <p>5. Flexible packaging material as claimed in Claim 1, 2 or 3, wherein the substantially impervious film comprises silicon oxide coated polyester.</p>
    <p>6. Flexible packaging material as claimed in any of Claims 1 to 5, wherein the first layer and the overlayer(s) are transparent.</p>
    <p>7. A method of manufacturing flexible packaging material comprising simultaneously passing a first layer of polyethylene film together with at least one overlayer substantially impervious film of plastics material through the nip of a pair of laminating rollers so as to cause cohesion between the first layer and overlayer(s).</p>
    <p>8. The method claimed in Claim 7, wherein the first layer is of tubular form.</p>
    <p>9. The method claimed in Claim 7, wherein the first layer is of single thickness.</p>
    <p>10. The method claimed in Claim 7, 8 or 9, wherein the substantially impervious film comprises aluminium oxide coated polyester.</p>
    <p>flexible Packaging Matthal 11. The method claimed in Claim 7, 8 or 9, wherein the substantially impervious film comprises silicon oxide coated polyester.</p>
    <p>12. The method claimed in any one of Claims 7 to 11, wherein the first layer and the overlayer(s) are transparent.</p>
    <p>13. Flexible packaging material manufactured according to the method claimed in any one of Claims 7 to 12.</p>
    <p>14. Flexible packaging material as claimed in Claim 13,twhefei incorporating one or more tie layers applied to the other layers so as to assist cohesion.</p>
    <p>15. Flexible packaging material, substantially as hereinbefore described, with is reference to Figure 1 of the accompanying drawings.</p>
    <p>16. Flexible packaging material as claimed in Claim 12, modified substantially as hereinbefore described with reference to Figure 2 of the accompanying drawings.</p>
    <p>17. A method of manufacturing flexible packaging material substantially as hereinbefore described, with reference to Figure 1 of the accompanying drawings.</p>
    <p>18. A method of manufacturing flexible packaging material as claimed in Claim 17, modified substantially as hereinbefore described, with reference to Figure 2 of the accompanying drawings.</p>
    <p>19. Flexible packaging material manufactured as claimed in any one of claims 13to18.</p>
    <p>20. Flexible packaging material as claimed in Claim 19, in the form of a bag.</p>
    <p>FIe*jbIe Packaging MateiaI</p>
GB0613175A 2006-07-03 2006-07-03 Flexible packaging material Withdrawn GB2439727A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
GB0613175A GB2439727A (en) 2006-07-03 2006-07-03 Flexible packaging material

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
GB0613175A GB2439727A (en) 2006-07-03 2006-07-03 Flexible packaging material

Publications (2)

Publication Number Publication Date
GB0613175D0 GB0613175D0 (en) 2006-08-09
GB2439727A true GB2439727A (en) 2008-01-09

Family

ID=36888528

Family Applications (1)

Application Number Title Priority Date Filing Date
GB0613175A Withdrawn GB2439727A (en) 2006-07-03 2006-07-03 Flexible packaging material

Country Status (1)

Country Link
GB (1) GB2439727A (en)

Citations (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB1086482A (en) * 1964-03-13 1967-10-11 Du Pont Improvements in composite packaging films
US4906494A (en) * 1985-10-09 1990-03-06 The Dow Chemical Company Antistatic sheet material, package and method of making
EP0365326A2 (en) * 1988-10-19 1990-04-25 V.M.B. Limited Composite plastics film
US5387449A (en) * 1992-05-22 1995-02-07 Alusuisse-Lonza Services Ltd. Composites of plastic films and packaging made thereof
WO1996008368A1 (en) * 1994-09-12 1996-03-21 Elf Atochem S.A. Packaging material comprising a silicon oxide layer and a polyolefin layer
WO1998032601A2 (en) * 1997-01-29 1998-07-30 Tetra Laval Holdings & Finance S.A. Transparent high barrier multilayer structure
US20040185265A1 (en) * 2003-03-17 2004-09-23 Bybee Cary R. Flexible barrier film structure
US20050058790A1 (en) * 1996-01-11 2005-03-17 Robert Simon Metallized heat resistant material with thermal barrier

Patent Citations (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB1086482A (en) * 1964-03-13 1967-10-11 Du Pont Improvements in composite packaging films
US4906494A (en) * 1985-10-09 1990-03-06 The Dow Chemical Company Antistatic sheet material, package and method of making
EP0365326A2 (en) * 1988-10-19 1990-04-25 V.M.B. Limited Composite plastics film
US5387449A (en) * 1992-05-22 1995-02-07 Alusuisse-Lonza Services Ltd. Composites of plastic films and packaging made thereof
WO1996008368A1 (en) * 1994-09-12 1996-03-21 Elf Atochem S.A. Packaging material comprising a silicon oxide layer and a polyolefin layer
US20050058790A1 (en) * 1996-01-11 2005-03-17 Robert Simon Metallized heat resistant material with thermal barrier
WO1998032601A2 (en) * 1997-01-29 1998-07-30 Tetra Laval Holdings & Finance S.A. Transparent high barrier multilayer structure
US20040185265A1 (en) * 2003-03-17 2004-09-23 Bybee Cary R. Flexible barrier film structure

Also Published As

Publication number Publication date
GB0613175D0 (en) 2006-08-09

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WAP Application withdrawn, taken to be withdrawn or refused ** after publication under section 16(1)