WO2007012898A1 - Detectable bag - Google Patents

Detectable bag Download PDF

Info

Publication number
WO2007012898A1
WO2007012898A1 PCT/GB2006/050219 GB2006050219W WO2007012898A1 WO 2007012898 A1 WO2007012898 A1 WO 2007012898A1 GB 2006050219 W GB2006050219 W GB 2006050219W WO 2007012898 A1 WO2007012898 A1 WO 2007012898A1
Authority
WO
WIPO (PCT)
Prior art keywords
detectable
bag
magnetically
layers
dispersion
Prior art date
Application number
PCT/GB2006/050219
Other languages
French (fr)
Inventor
John Teasdale
Original Assignee
B S Teasdale & Son Limited
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 B S Teasdale & Son Limited filed Critical B S Teasdale & Son Limited
Publication of WO2007012898A1 publication Critical patent/WO2007012898A1/en

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
    • B32B27/14—Layered products comprising a layer of synthetic resin next to a particulate 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
    • B32B1/00—Layered products having a general shape other than plane
    • 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
    • G—PHYSICS
    • G01—MEASURING; TESTING
    • G01V—GEOPHYSICS; GRAVITATIONAL MEASUREMENTS; DETECTING MASSES OR OBJECTS; TAGS
    • G01V15/00—Tags attached to, or associated with, an object, in order to enable detection of the object
    • 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
    • B32B2250/00—Layers arrangement
    • B32B2250/40—Symmetrical or sandwich layers, e.g. ABA, ABCBA, ABCCBA
    • 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
    • B32B2264/00—Composition or properties of particles which form a particulate layer or are present as additives
    • B32B2264/10—Inorganic particles
    • B32B2264/102—Oxide or hydroxide
    • 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
    • B32B2307/20—Properties of the layers or laminate having particular electrical or magnetic properties, e.g. piezoelectric
    • B32B2307/208—Magnetic, paramagnetic
    • 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
    • B32B2307/70—Other properties
    • B32B2307/718—Weight, e.g. weight per square meter
    • 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
    • B32B2439/00—Containers; Receptacles
    • B32B2439/70—Food packaging

Definitions

  • the present invention relates to detectable materials.
  • the invention relates to detectable materials for use in packaging in the food industry.
  • WO 94/02080 discloses a glove comprising a dye whose colour is modified when the glove is perforated.
  • US 5,922,482 discloses a detectable polymeric protective glove containing a material having conducting and/or magnetic properties which is detectable by a metal- particle detector.
  • WO 02/07186 discloses a glove produced from a polymeric material that contains an evenly dispersed quantity of electromagnetically detectable particles which may be in powder form.
  • the glove may be produced by mixing the powder with a liquid plastisol to produce a relatively homogeneous mix where the powder or particles represents between 3-6% of the mix.
  • GB 2360976 and WO 00/23275 disclose a food packaging material comprising a laminar plastics film comprising outer sheets of a polyolefin material and a core layer containing metallic material.
  • the core layer is electrically conductive and magnetic so as to be detectable by a metal detector.
  • the core layer may be produced by extrusion of a polyolefin with metallic material, by printing an inner or outer polyolefin layer with a metal enriched ink, and/or by vapour deposition. It is to be appreciated that this disclosure is specifically directed to a detectable layer made of a magnetic and electrically conductive metallic material.
  • fragments of packaging materials such as polythene bags can also be introduced inadvertently into food during preparation.
  • a lightweight magnetically detectable bag made out of a film material comprising a layer of a magnetically-detectable metal oxide material disposed between first and second layers of a plastics material.
  • a method of manufacturing a lightweight magnetically detectable bag comprising a film material composed of a layer of a magnetically-detectable metal oxide material disposed between first and second layers of a plastics material, wherein the layers are formed by a co-extrusion process.
  • the invention has the advantage that fragments of the bag inadvertently introduced into a foodstuff may be detected by a magnetic detector when the foodstuff passes the detector.
  • the bag comprises a composite of the magnetically detectable material, the magnetically detectable material being sandwiched between upper and lower layers of the film.
  • the layer of magnetically-detectable material may comprise a magnetically-detectable metal oxide powder or the like dispersed, preferably homogeneously, within a plastics material.
  • the magnetically-detectable material comprises a dispersion of iron oxide, preferably synthetic black Fe 3 O 4 , in the plastics material.
  • An example of this material is ECP 226.
  • the plasties material may be polyethylene, e.g. linear low density polyethylene (LDPE) or any other material suitable for the manufacture of plastic bags.
  • the magnetically-detectable oxide powder or the like is dispersed in the plastics material by way of a screw compounding, preferably a twin screw compounding, process.
  • Twin screw compounding uses a combination of dispersive and distributive mixing of two or more components to form a substantially homogeneous mass in a continuous process.
  • Forward-flighted screw elements are used to convey materials, and reverse-flighted screw elements are used to create pressure fields. Kneaders and shear elements are used to mix and melt the components.
  • the magnetically-detectable metal oxide powder is homogeneously mixed throughout the volume of the plastics material, as opposed, for example, to being merely printed on surface regions thereof.
  • At least one of the first and second layers of the plastics material is of a non-food colour readily visible to the eye.
  • the layers may be of a blue colour.
  • the bag may be produced using a cross-head blown film extruder that allows the magnetically detectable material to be introduced in the centre of the resulting composite.
  • the metal oxide layer is precompounded with the plastics material (e.g. by screw compounding) and then co-extruded with the first and second outer layers of plastics material.
  • the plastics material e.g. by screw compounding
  • co-extruded with the first and second outer layers of plastics material e.g. by screw compounding
  • co-extrusion of the three layers results in a compound material that is highly resistant to delamination, as well as being a simple and cost-effective one-step process.
  • a preferred method of co-extrusion is blown film co-extrusion, in which two or more molten polymers are simultaneously extruded through a common die as films which immediately adhere to each other to form an integral film of remarkable strength and barrier properties. Just prior to exit from the die, the molten polymers flow together into a single flow channel, their laminar flow behaviour keeping them generally in separate layers in the final product. No pre-treatment is required, and the bonding between the layers is significantly improved, so that delamination is virtually impossible.
  • three layers are simultaneously co- extruded - two outer layers (to provide, e.g. colour and improved burst properties) and an inner layer including the magnetically-detectable metal oxide material.
  • FIGURE 1 is a cross-sectional schematic of a bag according to the preferred embodiment.
  • a bag according to the preferred embodiment of the invention comprises a composite of a magnetically-detectable component dispersed in polyethylene material B and a polyethylene material A in the form of an A-B-A sandwich as illustrated schematically in Figure 1.
  • the magnetically detectable polyethylene layer B comprises a dispersion of synthetic black iron oxide, Fe 3 O 4 , in polyethylene.
  • the bag is formed by introducing the magnetically detectable LDPE compound into the centre of a film during the production process, which employs a cross-head blown film extruder.
  • a cross-head blown film extruder Preferably, an extruder temperature of 120 to 160 0 C and a die temperature of 160 to 180 0 C is employed.
  • the layer B is formed from a dispersion of synthetic black iron oxide, Fe 3 O 4 , in polyethylene, the dispersion having a melt flow rate of 20g/10min (190°C/2.16kg) and a bulk density of 550g/l
  • the overall thickness of the resulting composite varies from 50 micron to 100 microns, with the detectable layer being nominally a minimum thickness of 25 microns.

Abstract

A lightweight magnetically detectable bag made out of a film material comprising a layer of a magnetically-detectable material disposed between first and second layers of a plastics material. The first and/or the second layer may be of a non-food colour. The bag is designed to be easily detectable in food products and the like in the event that it enters a food production line, even if it is torn into small pieces by food processing machinery.

Description

DETECTABLE BAG
The present invention relates to detectable materials. In particular the invention relates to detectable materials for use in packaging in the food industry.
The problem of contamination of food by foreign bodies during preparation and handling is well known. Potential contaminants include items of clothing or fragments thereof worn by handling personnel.
A number of solutions to the problem have been proposed including visual detection, x- ray detection and magnetic detection.
For reasons of hygiene, clothing is typically made in a light colour (eg white) so that cleanliness of the clothing may be easily monitored. However, fragments of light coloured fabrics mixed with food are not easily detected, making visual detection unreliable. Accordingly, to aid in detection, clothing may be given a non-food colour such as blue so as to be more easily visually detectable. WO 94/02080 discloses a glove comprising a dye whose colour is modified when the glove is perforated.
Visual detection of fragments is unreliable however, since the foodstuff in preparation is not always visible to an operator. The technique relies on the contaminant being both sufficiently large to be easily seen, and located at an exposed surface of the foodstuff.
US 5,922,482 (DE RICCI) discloses a detectable polymeric protective glove containing a material having conducting and/or magnetic properties which is detectable by a metal- particle detector.
WO 02/07186 discloses a glove produced from a polymeric material that contains an evenly dispersed quantity of electromagnetically detectable particles which may be in powder form. The glove may be produced by mixing the powder with a liquid plastisol to produce a relatively homogeneous mix where the powder or particles represents between 3-6% of the mix.
GB 2360976 and WO 00/23275 disclose a food packaging material comprising a laminar plastics film comprising outer sheets of a polyolefin material and a core layer containing metallic material. The core layer is electrically conductive and magnetic so as to be detectable by a metal detector. The core layer may be produced by extrusion of a polyolefin with metallic material, by printing an inner or outer polyolefin layer with a metal enriched ink, and/or by vapour deposition. It is to be appreciated that this disclosure is specifically directed to a detectable layer made of a magnetic and electrically conductive metallic material.
In addition to the problem of contamination due to fragments of clothing, the problem also exists that fragments of packaging materials such as polythene bags can also be introduced inadvertently into food during preparation.
According to a first aspect of the present invention, there is provided a lightweight magnetically detectable bag made out of a film material comprising a layer of a magnetically-detectable metal oxide material disposed between first and second layers of a plastics material.
According to a second aspect of the present invention, there is provided a method of manufacturing a lightweight magnetically detectable bag comprising a film material composed of a layer of a magnetically-detectable metal oxide material disposed between first and second layers of a plastics material, wherein the layers are formed by a co-extrusion process.
The invention has the advantage that fragments of the bag inadvertently introduced into a foodstuff may be detected by a magnetic detector when the foodstuff passes the detector.
Preferably the bag comprises a composite of the magnetically detectable material, the magnetically detectable material being sandwiched between upper and lower layers of the film.
The layer of magnetically-detectable material may comprise a magnetically-detectable metal oxide powder or the like dispersed, preferably homogeneously, within a plastics material. In a preferred embodiment, the magnetically-detectable material comprises a dispersion of iron oxide, preferably synthetic black Fe3O4, in the plastics material. An example of this material is ECP 226. The plasties material may be polyethylene, e.g. linear low density polyethylene (LDPE) or any other material suitable for the manufacture of plastic bags.
In currently preferred embodiments, the magnetically-detectable oxide powder or the like is dispersed in the plastics material by way of a screw compounding, preferably a twin screw compounding, process. Twin screw compounding uses a combination of dispersive and distributive mixing of two or more components to form a substantially homogeneous mass in a continuous process. Forward-flighted screw elements are used to convey materials, and reverse-flighted screw elements are used to create pressure fields. Kneaders and shear elements are used to mix and melt the components.
By way of this process, the magnetically-detectable metal oxide powder is homogeneously mixed throughout the volume of the plastics material, as opposed, for example, to being merely printed on surface regions thereof.
Preferably at least one of the first and second layers of the plastics material, and most preferably both, is of a non-food colour readily visible to the eye. For example, the layers may be of a blue colour.
The bag may be produced using a cross-head blown film extruder that allows the magnetically detectable material to be introduced in the centre of the resulting composite.
In a particularly preferred embodiment, the metal oxide layer is precompounded with the plastics material (e.g. by screw compounding) and then co-extruded with the first and second outer layers of plastics material. In this way, a greater homogeneity of metal oxide in the inner plastics layer is provided. Moreover, co-extrusion of the three layers results in a compound material that is highly resistant to delamination, as well as being a simple and cost-effective one-step process.
A preferred method of co-extrusion is blown film co-extrusion, in which two or more molten polymers are simultaneously extruded through a common die as films which immediately adhere to each other to form an integral film of remarkable strength and barrier properties. Just prior to exit from the die, the molten polymers flow together into a single flow channel, their laminar flow behaviour keeping them generally in separate layers in the final product. No pre-treatment is required, and the bonding between the layers is significantly improved, so that delamination is virtually impossible.
In preferred embodiments of the present invention, three layers are simultaneously co- extruded - two outer layers (to provide, e.g. colour and improved burst properties) and an inner layer including the magnetically-detectable metal oxide material.
For a better understanding of the present invention, and to show how it may be carried into effect, reference shall now be made by way of example to the accompanying drawings, in which:
FIGURE 1 is a cross-sectional schematic of a bag according to the preferred embodiment.
A bag according to the preferred embodiment of the invention comprises a composite of a magnetically-detectable component dispersed in polyethylene material B and a polyethylene material A in the form of an A-B-A sandwich as illustrated schematically in Figure 1. The magnetically detectable polyethylene layer B comprises a dispersion of synthetic black iron oxide, Fe3O4, in polyethylene.
The bag is formed by introducing the magnetically detectable LDPE compound into the centre of a film during the production process, which employs a cross-head blown film extruder. Preferably, an extruder temperature of 120 to 1600C and a die temperature of 160 to 1800C is employed.
In a currently preferred embodiment, the layer B is formed from a dispersion of synthetic black iron oxide, Fe3O4, in polyethylene, the dispersion having a melt flow rate of 20g/10min (190°C/2.16kg) and a bulk density of 550g/l
The overall thickness of the resulting composite varies from 50 micron to 100 microns, with the detectable layer being nominally a minimum thickness of 25 microns.
Throughout the description and claims of this specification, the words "comprise" and "contain" and variations of the words, for example "comprising" and "comprises", means "including but not limited to", and is not intended to (and does not) exclude other moieties, additives, components, integers or steps. Throughout the description and claims of this specification, the singular encompasses the plural unless the context otherwise requires. In particular, where the indefinite article is used, the specification is to be understood as contemplating plurality as well as singularity, unless the context requires otherwise.
Features, integers, characteristics, compounds, chemical moieties or groups described in conjunction with a particular aspect, embodiment or example of the invention are to be understood to be applicable to any other aspect, embodiment or example described herein unless incompatible therewith.

Claims

CLAIMS:
1. A lightweight magnetically detectable bag made out of a film material comprising a layer of a magnetically-detectable metal oxide material disposed between first and second layers of a plastics material.
2. A bag as claimed in claim 1, wherein the magnetically-detectable material comprises a dispersion of a magnetically-detectable metal oxide powder in a plastics material.
3. A bag as claimed in claim 2, wherein the dispersion is a substantially homogeneous dispersion.
4. A bag as claimed in claim 2 or 3, wherein the layers of plastics material are co- extruded to form a delamination-resistant film.
5. A bag as claimed in any preceding claim, wherein the plastics material is polyethylene.
6. A bag as claimed in any preceding claim, wherein at least one of the first and second layers is of a non-food colour.
7. A bag as claimed in any preceding claim, wherein both the first and second layers are of a non-food colour.
8. A bag as claimed in claim 6 or 7, wherein the non-food colour is blue.
9. A bag as claimed in claim 7, wherein the first and second layers are of different colours.
10. A bag as claimed in any preceding claim, wherein film material has a total thickness of 50 to 100 microns.
11. A bag as claimed in claim 10, wherein the layer of magnetically-detectable material has a minimum thickness of 25 microns.
12. A bag as claimed in any preceding claim, wherein the magnetically-detectable material comprises a dispersion of a synthetic black Fe3O4 in polyethylene.
13. A method of manufacturing a lightweight magnetically detectable bag comprising a film material composed of a layer of a magnetically-detectable metal oxide material disposed between first and second layers of a plastics material, wherein the layers are formed by a co-extrusion process.
14. A method according to claim 13, wherein the co-extrusion process is a blown film co-extrusion process.
15. A method according to claim 13 or 14, wherein the layer of magnetically- detectable material comprises a dispersion of a magnetically-detectable metal oxide powder in a plastics material.
16. A method according to claim 15, wherein the dispersion is a substantially homogeneous dispersion.
17. A method according to claim 16, wherein the dispersion is formed by way of screw compounding.
18. A method according to any one of claims 13 to 17, wherein the layers of plastics material are co-extruded to form a delamination-resistant film.
19. A method according to any one of claims 13 to 18, wherein the plastics material is polyethylene.
20. A method according to any one of claims 13 to 19, wherein at least one of the first and second layers is of a non-food colour.
21. A method according to any one of claims 13 to 19, wherein both the first and second layers are of a non-food colour.
22. A method according to any one of claims 20 or 21 , wherein the non-food colour is blue.
23. A method according to claim 21 , wherein the first and second layers are of different colours.
24. A method according to any one of claims 13 to 23, wherein film material has a total thickness of 50 to 100 microns.
25. A method according to 24, wherein the layer of magnetically-detectable material has a minimum thickness of 25 microns.
26. A method according to any one of claims 13 to 25, wherein the magnetically- detectable material comprises a dispersion of a synthetic black Fe3O4 in polyethylene.
27. A lightweight magnetically detectable bag substantially as hereinbefore described.
28. A method of manufacturing a lightweight magnetically detectable bag substantially as hereinbefore described.
PCT/GB2006/050219 2005-07-27 2006-07-24 Detectable bag WO2007012898A1 (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
GB0515398.6 2005-07-27
GB0515398A GB2428629A (en) 2005-07-27 2005-07-27 Magnetically detectable bag

Publications (1)

Publication Number Publication Date
WO2007012898A1 true WO2007012898A1 (en) 2007-02-01

Family

ID=34976673

Family Applications (1)

Application Number Title Priority Date Filing Date
PCT/GB2006/050219 WO2007012898A1 (en) 2005-07-27 2006-07-24 Detectable bag

Country Status (2)

Country Link
GB (1) GB2428629A (en)
WO (1) WO2007012898A1 (en)

Cited By (11)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US7967435B1 (en) * 2010-04-21 2011-06-28 3M Innovative Properties Company Metal detectable lens
WO2012134981A1 (en) * 2011-03-25 2012-10-04 Illinois Tool Works Inc. Electromagnetic spectrally detectable plastic packaging components
US8342679B2 (en) 2010-04-21 2013-01-01 3M Innovative Properties Company Metal detectable lens carrier
WO2018067111A1 (en) * 2016-10-03 2018-04-12 Viskase Companies, Inc. Method of manufacturing food packaging plastic films and food packaging plastic films thus produced
US10619268B2 (en) 2013-11-13 2020-04-14 Illinois Tool Works, Inc. Metal detectable fiber and articles formed from the same
WO2020161373A1 (en) 2019-02-04 2020-08-13 Avanzare Innovacion Tecnologica S.L. Method for granting to organic polymers the possibility of being detected
US10753022B2 (en) 2014-07-25 2020-08-25 Illinois Tool Works, Inc. Particle-filled fiber and articles formed from the same
US10947664B2 (en) 2018-02-19 2021-03-16 Illinois Tool Works Inc. Metal detectable scouring pad
US11499024B2 (en) 2016-10-03 2022-11-15 Viskase Companies, Inc. Method of manufacturing food packaging cellulosic films and food packaging cellulosic films thus produced
US11542634B2 (en) 2014-07-25 2023-01-03 Illinois Tool Works Inc. Particle-filled fiber and articles formed from the same
US11969928B2 (en) 2016-10-03 2024-04-30 Viskase Companies, Inc. Method of manufacturing food packaging plastic films and food packaging plastic films thus produced

Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US5922482A (en) * 1995-11-09 1999-07-13 Hutchinson Detectable polymeric protective gloves
WO2000023275A1 (en) * 1998-10-20 2000-04-27 Dynamic Products Limited Laminar plastics film
WO2002071876A1 (en) * 2001-03-09 2002-09-19 Ck European Safety Equipment Limited Gloves
WO2003045655A1 (en) * 2001-11-29 2003-06-05 Bell, Glenda, Fay Moulding composition
WO2006026823A1 (en) * 2004-09-09 2006-03-16 Bell, Glenda, Fay Separation of plastic and elastomers for food and pharmaceutical products

Family Cites Families (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPH02166059A (en) * 1988-12-14 1990-06-26 Dainippon Printing Co Ltd Packaging material

Patent Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US5922482A (en) * 1995-11-09 1999-07-13 Hutchinson Detectable polymeric protective gloves
WO2000023275A1 (en) * 1998-10-20 2000-04-27 Dynamic Products Limited Laminar plastics film
WO2002071876A1 (en) * 2001-03-09 2002-09-19 Ck European Safety Equipment Limited Gloves
WO2003045655A1 (en) * 2001-11-29 2003-06-05 Bell, Glenda, Fay Moulding composition
WO2006026823A1 (en) * 2004-09-09 2006-03-16 Bell, Glenda, Fay Separation of plastic and elastomers for food and pharmaceutical products

Cited By (15)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US8342679B2 (en) 2010-04-21 2013-01-01 3M Innovative Properties Company Metal detectable lens carrier
US7967435B1 (en) * 2010-04-21 2011-06-28 3M Innovative Properties Company Metal detectable lens
US9557311B2 (en) 2011-03-25 2017-01-31 Illinois Tool Works, Inc. Electromagnetic spectrally detectable plastic packaging components
CN103517856A (en) * 2011-03-25 2014-01-15 伊利诺斯工具制品有限公司 Electromagnetic spectrally detectable plastic packaging components
US8980982B2 (en) 2011-03-25 2015-03-17 Illinois Tool Works, Inc. Electromagnetic spectrally detectable plastic packaging components
RU2596965C2 (en) * 2011-03-25 2016-09-10 Иллинойс Тул Воркс Инк. Electromagnetic spectral revealed by plastic packaging components
WO2012134981A1 (en) * 2011-03-25 2012-10-04 Illinois Tool Works Inc. Electromagnetic spectrally detectable plastic packaging components
US10619268B2 (en) 2013-11-13 2020-04-14 Illinois Tool Works, Inc. Metal detectable fiber and articles formed from the same
US10753022B2 (en) 2014-07-25 2020-08-25 Illinois Tool Works, Inc. Particle-filled fiber and articles formed from the same
US11542634B2 (en) 2014-07-25 2023-01-03 Illinois Tool Works Inc. Particle-filled fiber and articles formed from the same
WO2018067111A1 (en) * 2016-10-03 2018-04-12 Viskase Companies, Inc. Method of manufacturing food packaging plastic films and food packaging plastic films thus produced
US11499024B2 (en) 2016-10-03 2022-11-15 Viskase Companies, Inc. Method of manufacturing food packaging cellulosic films and food packaging cellulosic films thus produced
US11969928B2 (en) 2016-10-03 2024-04-30 Viskase Companies, Inc. Method of manufacturing food packaging plastic films and food packaging plastic films thus produced
US10947664B2 (en) 2018-02-19 2021-03-16 Illinois Tool Works Inc. Metal detectable scouring pad
WO2020161373A1 (en) 2019-02-04 2020-08-13 Avanzare Innovacion Tecnologica S.L. Method for granting to organic polymers the possibility of being detected

Also Published As

Publication number Publication date
GB2428629A (en) 2007-02-07
GB0515398D0 (en) 2005-08-31

Similar Documents

Publication Publication Date Title
WO2007012898A1 (en) Detectable bag
CN103724791B (en) Very-high performance plastic sheeting and preparation method thereof and composite
KR102190252B1 (en) Antimicrobial Film Having Nano ZnO Particle, Method of Making the Same and Food Packing Products
CN101712778A (en) Biaxially oriented polypropylene film and preparation method thereof
CN104903101A (en) Improved multilayer blown films
CN102492294A (en) Biaxially oriented polyamide film and preparation method thereof
EP1098764A1 (en) Deep-drawn slidable foil based on polyolefins and polyamide
CN113195229B (en) Packaging film, film bag and manufacturing method thereof
US6093462A (en) Low orientation thermoplastic sheet products and processes
EP3862181A1 (en) Polyethylene film
CN114846059B (en) Film capable of laser printing and package using the same
JP6342102B2 (en) Method for producing molded product with wrinkle pattern and molded product with wrinkle pattern formed
CN106079765A (en) A kind of resistance to steaming and decocting casting films and production method thereof
EP1833670A2 (en) Thermoformable multilayer film
WO2022158487A1 (en) Layered film and packaging bag
CN111344337B (en) Method for producing polyethylene resin film
EP4105011A1 (en) Method for manufacturing fiber-containing sheet, and fiber-containing sheet
US20230150234A1 (en) Metallized packaging films from recycled plastics
CA2802597A1 (en) X-ray detectable plastics
US11612524B2 (en) Breathable diaper backsheet
KR101014196B1 (en) Tube type film for package and manufacturing method thereof
TW202128438A (en) Laser-printable film, and packaging in which same is used
CN115923287A (en) PE light sealing film, preparation method thereof and light sealing bagging composite film
KR840000540B1 (en) Three layer film having a core layer of low pressure low density polyethylene
EP1035972B1 (en) Flexible, thermoformable multi-layer film with improved movement in a machine

Legal Events

Date Code Title Description
121 Ep: the epo has been informed by wipo that ep was designated in this application
NENP Non-entry into the national phase

Ref country code: DE

122 Ep: pct application non-entry in european phase

Ref document number: 06765368

Country of ref document: EP

Kind code of ref document: A1