EP1177245A1 - Easy-to-peel heat-sealing multilayer film from coextruded, biaxially oriented polypropylene - Google Patents
Easy-to-peel heat-sealing multilayer film from coextruded, biaxially oriented polypropyleneInfo
- Publication number
- EP1177245A1 EP1177245A1 EP99964542A EP99964542A EP1177245A1 EP 1177245 A1 EP1177245 A1 EP 1177245A1 EP 99964542 A EP99964542 A EP 99964542A EP 99964542 A EP99964542 A EP 99964542A EP 1177245 A1 EP1177245 A1 EP 1177245A1
- Authority
- EP
- European Patent Office
- Prior art keywords
- lacquer
- film
- film according
- sealing
- coextruded
- 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- Withdrawn
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
- B32B27/32—Layered products comprising a layer of synthetic resin comprising polyolefins
-
- 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
- B65D75/00—Packages comprising articles or materials partially or wholly enclosed in strips, sheets, blanks, tubes, or webs of flexible sheet material, e.g. in folded wrappers
- B65D75/52—Details
- B65D75/58—Opening or contents-removing devices added or incorporated during package manufacture
- B65D75/5855—Peelable seals
-
- 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
- B32B2307/30—Properties of the layers or laminate having particular thermal properties
- B32B2307/31—Heat sealable
-
- 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
- B32B2307/50—Properties of the layers or laminate having particular mechanical properties
- B32B2307/514—Oriented
- B32B2307/518—Oriented bi-axially
-
- 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
- B32B2323/10—Polypropylene
-
- 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
- B32B2329/00—Polyvinylalcohols, polyvinylethers, polyvinylaldehydes, polyvinylketones or polyvinylketals
- B32B2329/06—PVB, i.e. polyinylbutyral
-
- 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
- B32B2553/00—Packaging equipment or accessories not otherwise provided for
Definitions
- Heat-sealable multilayer film made of coextruded, biaxially oriented polypropylene with peelable opening behavior
- the present invention relates to biaxially oriented, heat sealable, coextruded
- Polypropylene films which are equipped with printing on the inside and outside sealing to achieve a tear-free (peelable) longitudinal seam, and their use for the production of packaging.
- Heat-sealable packaging foils and their use for full wrapping with frontal folds and overlapping longitudinal seams have long been known. Unfinished raw foils have also been known for a long time, their overlapping sealed longitudinal seams can be peeled open with the appropriate setting of the sealing temperature, the sealing pressure and the sealing time. Examples include cellulose films coated with nitrocellulose and acrylic-coated, biaxially oriented
- BOPP Polypropylene film
- tear strips offer a possibility to alleviate the deficit of the difficult opening of packages made of coextruded BOPP films and to weaken an already industrially practiced application, as described in EP 0 577 509 B1 the sealing strength of the raw film by grid-like, seal-resistant printing of the sealing zones is so unreliable that only the additional use of a tear strip leads to the desired opening behavior with complete exposure of the packaged goods.
- Nitrocellulose or two-component polyurethanes due to their permanent spacer function, even under the influence of heat, as a principally desired reduction in sealing contact (area and pressure) of exposed co-extruded BOPP surfaces.
- BOPP is sealable, contains at least one polybutyral (PVB) or at least one ethylene-vinyl acetate copolymer (EVA-Copo) as a feature-determining component.
- PVB polybutyral
- EVA-Copo ethylene-vinyl acetate copolymer
- the design of the grid used in printing allows the sealing strength and peeling behavior to be influenced in a targeted manner when sealing inside against outside (a / b sealing).
- Table 3 shows particularly suitable grids. It is possible both to carry out the grating uniformly over the length and width of the sealing area and to make the grating variable over the length and / or width of the sealing area within the possibilities of the engraving technique in order to meet special requirements with regard to seam strength and / or to meet peel behavior. According to the grid described, the lacquer application is carried out over part of the area and preferably with a full-tone engraving depth.
- the paint used is a commercially available paint / varnish system with
- PVB varnishes Polyvinyl butyrate (PVB), as is commonly used for counterprinting on coextruded BOPP surfaces (e.g. 15-020613-4, MX 31 series, Siegwerk), or ethylene-vinyl acetate copolymers (EVA copo, e.g. 10- 612764-0 W, Siegwerk) as a feature-determining solid component. Mixtures of several PVB lacquers or several EVA copo lacquers are also possible.
- the application amount (dry) of varnish for PVB varnishes is preferably 0J to 1.7 g / m 2 , in particular 0.8 to 1.2 g / m 2 . In the case of EVA copo paints, application amounts (dry) of 0.1 to 2.5 g / m 2 , in particular 1.0 to 1.5 g / m 2, are preferred.
- the film according to the invention is preferably a coextruded film
- BOPP film that was printed outside the color-free sealing areas on the electrically pretreated side using relie-controlled gravure printing.
- the printing equipment according to the invention makes it possible to set coextruded BOPP films which, as raw films, have too high seal strengths with tear separation images, so that they can be sealed more weakly and peelably.
- the film according to the invention is preferably produced by multi-use printing of commercially available, largely standardized, coextruded BOPP films in rotogravure or flexographic printing, preferably on conventional multicolor gravure printing machines with register control using engraved cylinders with a cup shape, with frontal or co-extruded suitable for BOPP Counter printing inks can be used in combination with one of the lacquers according to the invention in the color-free range. Finally, a customer-specific final cut is made on commercially available roll cutting machines with side edge control. The arrangement of the color-free areas depends on the shape of the packaging which is to be produced from the coextruded BOPP film. Color-free are preferred
- the invention further relates to packagings produced from the films according to the invention, in particular full wrapping packagings, which have no additional tear-open aid and can be opened easily and without cracks.
- the relevant properties of the films according to the invention corresponding to the intended use are determined by testing the low-pressure seal strength (NDS) over a film-compatible temperature range (sealing curve) in order to assess their suitability for wrapping packages.
- NDS low-pressure seal strength
- the force in N is determined as the low-pressure seal strength, which is necessary for the splitting separation of a seal seam produced under defined conditions (pressure, temperature, time).
- Measuring devices Low pressure sealing device from Brugger, with sealing jaws 20 * 50 mm 2 , finished, 5 different temperatures. 5 counterweights with 25 * 30 mm 2 contact surface, which are covered with 2 to 3 mm thick felt.
- Test strip cutter with a cutting width of 15 mm.
- Tensile testing machine with measuring range ION and pulling speed 100 mm / min.
- the applicable temperature range is of different widths and, for the shapes to be favored (60/1 and 70/4), requires precise temperature control of the sealing tools in the packaging operation (Table 1).
- Example 2 By replacing the PVB varnish used in Example 1 with a commercially available water-thinnable sealing wax based on an aqueous dispersion of saponified synthetic resins (ethylene-vinyl acetate copolymer) in the form of the sealing wax 10-612764-OW from Siegwerk Druckmaschine GmbH & Co KG, with designated
- the NDS (a / b) of the untreated against the pretreated side of the unprinted raw film also shows no usable course over temperature. Although, as expected, the values are lower than for the NDS (a / a) in
- Table 3 Explanation of the squares in Table 1, Example 2 and Comparative Example 3, as well as the differentiation according to areas X, Y and Z, with a uniform engraving grid 70/0.
Abstract
Description
Claims
Applications Claiming Priority (3)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
DE19859689 | 1998-12-23 | ||
DE19859689A DE19859689C1 (en) | 1998-12-23 | 1998-12-23 | Heat-sealable multilayer film made of coextruded, biaxially oriented polypropylene with peelable opening behavior |
PCT/EP1999/009775 WO2000039200A1 (en) | 1998-12-23 | 1999-12-10 | Easy-to-peel heat-sealing multilayer film from coextruded, biaxially oriented polypropylene |
Publications (1)
Publication Number | Publication Date |
---|---|
EP1177245A1 true EP1177245A1 (en) | 2002-02-06 |
Family
ID=7892406
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
EP99964542A Withdrawn EP1177245A1 (en) | 1998-12-23 | 1999-12-10 | Easy-to-peel heat-sealing multilayer film from coextruded, biaxially oriented polypropylene |
Country Status (5)
Country | Link |
---|---|
EP (1) | EP1177245A1 (en) |
AU (1) | AU3037100A (en) |
DE (1) | DE19859689C1 (en) |
PL (1) | PL349416A1 (en) |
WO (1) | WO2000039200A1 (en) |
Cited By (6)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US7871697B2 (en) | 2006-11-21 | 2011-01-18 | Kraft Foods Global Brands Llc | Peelable composite thermoplastic sealants in packaging films |
US7871696B2 (en) | 2006-11-21 | 2011-01-18 | Kraft Foods Global Brands Llc | Peelable composite thermoplastic sealants in packaging films |
US8389596B2 (en) | 2010-02-26 | 2013-03-05 | Kraft Foods Global Brands Llc | Low-tack, UV-cured pressure sensitive adhesive suitable for reclosable packages |
US8398306B2 (en) | 2005-11-07 | 2013-03-19 | Kraft Foods Global Brands Llc | Flexible package with internal, resealable closure feature |
US8763890B2 (en) | 2010-02-26 | 2014-07-01 | Intercontinental Great Brands Llc | Package having an adhesive-based reclosable fastener and methods therefor |
US9532584B2 (en) | 2007-06-29 | 2017-01-03 | Kraft Foods Group Brands Llc | Processed cheese without emulsifying salts |
Families Citing this family (3)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US9533472B2 (en) | 2011-01-03 | 2017-01-03 | Intercontinental Great Brands Llc | Peelable sealant containing thermoplastic composite blends for packaging applications |
DE102015010405A1 (en) | 2015-08-14 | 2017-02-16 | Sig Technology Ag | Flat composite, in particular for dimensionally stable containers, with partially applied outer thermoplastic sealing layer |
DE102015010404A1 (en) | 2015-08-14 | 2017-03-09 | Sig Technology Ag | Flat composite, in particular for dimensionally stable containers, with external thermoplastic sealing layer applied over part of the surface, in particular for sealing a longitudinal seam |
Family Cites Families (3)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
IT1181945B (en) * | 1984-12-31 | 1987-09-30 | Manuli Autoadesivi Spa | IMPROVEMENT IN SELF-ADHESIVE TAPES |
DE69305924T2 (en) * | 1992-06-30 | 1997-04-10 | Sony Corp | Film for wrapping a cassette case |
WO1997003822A1 (en) * | 1995-07-24 | 1997-02-06 | Wolff Walsrode Aktiengesellschaft | Composite films with biaxially oriented polyethylene sealing layers |
-
1998
- 1998-12-23 DE DE19859689A patent/DE19859689C1/en not_active Expired - Fee Related
-
1999
- 1999-12-10 WO PCT/EP1999/009775 patent/WO2000039200A1/en not_active Application Discontinuation
- 1999-12-10 EP EP99964542A patent/EP1177245A1/en not_active Withdrawn
- 1999-12-10 PL PL99349416A patent/PL349416A1/en not_active Application Discontinuation
- 1999-12-10 AU AU30371/00A patent/AU3037100A/en not_active Abandoned
Non-Patent Citations (1)
Title |
---|
See references of WO0039200A1 * |
Cited By (11)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US8398306B2 (en) | 2005-11-07 | 2013-03-19 | Kraft Foods Global Brands Llc | Flexible package with internal, resealable closure feature |
US7871697B2 (en) | 2006-11-21 | 2011-01-18 | Kraft Foods Global Brands Llc | Peelable composite thermoplastic sealants in packaging films |
US7871696B2 (en) | 2006-11-21 | 2011-01-18 | Kraft Foods Global Brands Llc | Peelable composite thermoplastic sealants in packaging films |
US8110286B2 (en) | 2006-11-21 | 2012-02-07 | Kraft Foods Global Brands Llc | Peelable composite thermoplastic sealants in packaging films |
US8470397B2 (en) | 2006-11-21 | 2013-06-25 | Kraft Foods Global Brands Llc | Peelable composite thermoplastic sealants in packaging films |
US9532584B2 (en) | 2007-06-29 | 2017-01-03 | Kraft Foods Group Brands Llc | Processed cheese without emulsifying salts |
US8389596B2 (en) | 2010-02-26 | 2013-03-05 | Kraft Foods Global Brands Llc | Low-tack, UV-cured pressure sensitive adhesive suitable for reclosable packages |
US8763890B2 (en) | 2010-02-26 | 2014-07-01 | Intercontinental Great Brands Llc | Package having an adhesive-based reclosable fastener and methods therefor |
US9096780B2 (en) | 2010-02-26 | 2015-08-04 | Intercontinental Great Brands Llc | Reclosable fasteners, packages having reclosable fasteners, and methods for creating reclosable fasteners |
US9382461B2 (en) | 2010-02-26 | 2016-07-05 | Intercontinental Great Brands Llc | Low-tack, UV-cured pressure sensitive adhesive suitable for reclosable packages |
US10287077B2 (en) | 2010-02-26 | 2019-05-14 | Intercontinental Great Brands Llc | Low-tack, UV-cured pressure sensitive adhesive suitable for reclosable packages |
Also Published As
Publication number | Publication date |
---|---|
AU3037100A (en) | 2000-07-31 |
PL349416A1 (en) | 2002-07-29 |
WO2000039200A1 (en) | 2000-07-06 |
DE19859689C1 (en) | 2000-09-21 |
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Effective date: 20030611 |