WO2021167561A1 - A package material with reduced chemical substance usage - Google Patents

A package material with reduced chemical substance usage Download PDF

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Publication number
WO2021167561A1
WO2021167561A1 PCT/TR2020/051461 TR2020051461W WO2021167561A1 WO 2021167561 A1 WO2021167561 A1 WO 2021167561A1 TR 2020051461 W TR2020051461 W TR 2020051461W WO 2021167561 A1 WO2021167561 A1 WO 2021167561A1
Authority
WO
WIPO (PCT)
Prior art keywords
packaging material
thermolacquer
food
packaging
contact
Prior art date
Application number
PCT/TR2020/051461
Other languages
French (fr)
Inventor
Hulusi ARSLAN
Aytac ARMAGAN
Feyza CALISKAN
Cansev UZUN
Original Assignee
Etapak Baski Ambalaj Sanayi Ve Ticaret Anonim Sirketi
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 Etapak Baski Ambalaj Sanayi Ve Ticaret Anonim Sirketi filed Critical Etapak Baski Ambalaj Sanayi Ve Ticaret Anonim Sirketi
Publication of WO2021167561A1 publication Critical patent/WO2021167561A1/en

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
    • B65D77/00—Packages formed by enclosing articles or materials in preformed containers, e.g. boxes, cartons, sacks or bags
    • B65D77/10—Container closures formed after filling
    • B65D77/20—Container closures formed after filling by applying separate lids or covers, i.e. flexible membrane or foil-like covers
    • B65D77/2024—Container closures formed after filling by applying separate lids or covers, i.e. flexible membrane or foil-like covers the cover being welded or adhered to the container
    • 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
    • B32B15/00—Layered products comprising a layer of metal
    • B32B15/04—Layered products comprising a layer of metal comprising metal as the main or only constituent of a layer, which is next to another layer of the same or of a different material
    • B32B15/08—Layered products comprising a layer of metal comprising metal 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
    • B32B15/09—Layered products comprising a layer of metal comprising metal 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 comprising polyesters
    • 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
    • B32B15/00—Layered products comprising a layer of metal
    • B32B15/20—Layered products comprising a layer of metal comprising aluminium or copper
    • 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
    • B65D65/02—Wrappers or flexible covers
    • B65D65/14—Wrappers or flexible covers with areas coated with adhesive
    • 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
    • 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 invention relates to a packaging material to be used in the packaging of glass water, fruit yoghurt and similar products, wherein the density of the thermolacquer chemical substance that is essentially present in the area where the food comes into contact, is reduced.
  • aluminum packaging materials are generally one of the most commonly used packaging materials.
  • Aluminum packaging materials are lightweight, soft and easily formed materials.
  • a thin aluminum oxide film is formed on its surface. Said aluminum oxide film protects aluminum against atmospheric corrosion. However, in cases where there is little or no oxygen, this protective layer disappears.
  • Aluminum is used widely in the production of box covers that can be easily opened by tearing it in strip form. Since metal-based packaging materials are in direct contact with food, we must be careful while using them. It must not react with food, be hermetically sealed, be resistant to temperature and internal pressure, and must be resistant to corrosion.
  • thermolacquer coating process is carried out by hot bonding PET or PVC materials depending on the field of use in the packaging industry.
  • the packaging material obtained in the state of the art is bonded to the fruit yoghurt or glass water container by the thermolacquer bonding process.
  • the chemical substance used in the thermolacquer bonding process is in contact with the food stored in the container.
  • the food in contact incorporates the chemicals included in thermolacquer during long term storage. As it is known, said chemical substances are harmful for human health.
  • the present invention is related to a packaging material suitable for containers used in the storage of yoghurt, fruit yoghurt, water or similar products in order to eliminate the abovementioned disadvantages and to bring new advantages to the relevant technical field.
  • the main aim of the invention is to provide a packaging material with reduced chemical contact with food.
  • Another aim of the invention is to provide a packaging material with reduced solvent usage.
  • the invention is related to a packaging material so as to fulfill all aims mentioned above and will be obtained from the following detailed description. Accordingly, the packaging material obtained with the invention contains less chemical substances in the middle section where it is in contact with food. Therefore, the food stored in the container is prevented from contacting with the chemical substance and thus it is provided to store the food in accordance with human health.
  • the packaging material is configured in a manner such that the density of the chemical material used in the thermolacquer process that will provide adhesion between the lower layer and the upper layer of the container is less than the other sections of the middle section of the packaging material where it is in contact with the food.
  • the cylinder that allows the chemical material to reach the packaging material in the process applies chemical substance to the middle section of the packaging material where it is in contact with the food less than the other sections.
  • a possible embodiment of the invention is that the density of the chemical substance in the middle section where the packaging material is in contact with the food is less than the other parts at a value between 30% and 60% by weight.
  • packaging materials (1) used in the storage of products such as yoghurt, fruit yoghurt and water contain aluminum and polyethylene terephthalate materials in certain proportions by weight.
  • the aluminum material is in the form of foil and is laminated in the upper/lower layers by means of bonding the same with PET polymer with glue.
  • Aluminum material is found on the upper layer of said laminated product and there is a print on said aluminum layer related to the product. It is provided to keep the food in the container ideally by means of the superior properties of the aluminum material on the upper section.
  • PET polymer material On the bottom layer of the laminated packaging material (1) there is PET polymer material.
  • the most important advantage of PET polymer for the packaging material (1) is to close the pores of the aluminum layer having thin thickness, at the same time to protect the same from necessary corrosive effects and to provide the required strength.
  • the thermolacquer process is applied to the PET polymer in the lower layer of the laminated packaging material (1).
  • Thermolacquer process is applied to every region of the lower layer of the laminated product and the chemical materials used in the thermolacquer process are in contact with the food in this manner. It is inevitable for chemical materials to penetrate in the food in long-term storage.
  • the adhesive section (11) of the packaging material (1) and the upper cover section of the container are in contact.
  • the packaging material (1) obtained in the invention is a laminated product wherein aluminum is placed on the upper layer and PET polymer is positioned in the lower layer; the thermolacquer process that allows the same to adhere to the container that stores food to the lower layer of the packaging material (1).
  • the innovation of our invention is that the thermolacquer process is not applied to every region of the lower section of the packaging material (1).
  • the middle section (10) of the packaging material (1) that is, the section in contact with the food within the container, contains less chemical substance than the other sections of the packaging material (1) with the design made in the manufacturing process.
  • the middle section (10) of the packaging material (1) contains less concentrated chemicals than the adhesive section (11).
  • thermolacquer material mentioned in the invention is made in a printing machine with the rotogravure process.
  • the packaging material (1) enters the cliche cavities of the printing machine, and the cylinder and thermolacquer materials contact with the packaging material (1).
  • the entire surface of the cylinders in the machine is coated with thermolacquer material in the art.
  • the thermolacquer material reaches to wherever the cylinder touches.
  • the cylinder in the invention is designed in a manner such that no thermolacquer material reaches to the middle section (10) of the packaging material (1). Said design essentially prevents the thermolacquer material from reaching in a section of the cylinder.
  • thermolacquer material used in the invention is solvent-based, and contains a maximum of 10 ppm/m 2 solvent residue in the packaging material (1) produced under normal production conditions measured with gas chromatography. Said residue can be caused by the adhesives and solvents used during printing.
  • the ratio of this residue is reduced by a value between 30% and 60%. Therefore, the interaction of the chemical substance with the middle section (10) of the packaging material (1) obtained that is in contact with the food is reduced.
  • Another benefit of the invention is that a lower cost packaging material (1) is obtained by using less adhesive chemicals.

Abstract

The invention is to configure said packaging material (1) that plays an active role in keeping and connecting with the upper part of the containers used in the packaging of glass water, fruit yoghurt and similar products in a manner such that the density of the chemical material used in the thermolacquer process that will provide adhesion between the lower layer and the upper layer of the container is less than the other sections of the middle section (10) of the packaging material (1) where it is in contact with the food.

Description

A PACKAGE MATERIAL WITH REDUCED CHEMICAL SUBSTANCE USAGE
TECHNICAL FIELD
The invention relates to a packaging material to be used in the packaging of glass water, fruit yoghurt and similar products, wherein the density of the thermolacquer chemical substance that is essentially present in the area where the food comes into contact, is reduced.
PRIOR ART
In the food industry, aluminum packaging materials are generally one of the most commonly used packaging materials. Aluminum packaging materials are lightweight, soft and easily formed materials. In case aluminum contacts with air, a thin aluminum oxide film is formed on its surface. Said aluminum oxide film protects aluminum against atmospheric corrosion. However, in cases where there is little or no oxygen, this protective layer disappears.
Aluminum is used widely in the production of box covers that can be easily opened by tearing it in strip form. Since metal-based packaging materials are in direct contact with food, we must be careful while using them. It must not react with food, be hermetically sealed, be resistant to temperature and internal pressure, and must be resistant to corrosion.
It can be coated with various films such as aluminum foil, paper, cardboard, cellophane materials, low density polyethylene (LDPE), polyethylene terephthalate (PET), oriented polypropylene (OPP), polyamide (PA), polyvinyl chloride (PVC) etc. Therefore, materials such as aluminum paper, cardboard, cellophane can be light-proof, gastight and vapor-proof and at the same time, the sensitivity of said materials to mechanical processes can be reduced. On the other hand, combinations created with thermoplastics give the aluminum foil thermal adhesion property and at the same time gas tightness and vapor permeability caused by the pores in the foil can be reduced to the lowest surface.
The thermolacquer coating process is carried out by hot bonding PET or PVC materials depending on the field of use in the packaging industry. The packaging material obtained in the state of the art is bonded to the fruit yoghurt or glass water container by the thermolacquer bonding process. However, the chemical substance used in the thermolacquer bonding process is in contact with the food stored in the container. The food in contact incorporates the chemicals included in thermolacquer during long term storage. As it is known, said chemical substances are harmful for human health.
Consequently, it is required to cut the contact of chemical substances with the food stored in the above-mentioned fruit yoghurt or glass water containers. As a result, due to abovementioned problem, it is required to make a novelty in the relevant technical field.
BRIEF DESCRIPTION OF THE INVENTION
The present invention is related to a packaging material suitable for containers used in the storage of yoghurt, fruit yoghurt, water or similar products in order to eliminate the abovementioned disadvantages and to bring new advantages to the relevant technical field.
The main aim of the invention is to provide a packaging material with reduced chemical contact with food.
Another aim of the invention is to provide a packaging material with reduced solvent usage.
The invention is related to a packaging material so as to fulfill all aims mentioned above and will be obtained from the following detailed description. Accordingly, the packaging material obtained with the invention contains less chemical substances in the middle section where it is in contact with food. Therefore, the food stored in the container is prevented from contacting with the chemical substance and thus it is provided to store the food in accordance with human health.
In a possible embodiment of the invention, the packaging material is configured in a manner such that the density of the chemical material used in the thermolacquer process that will provide adhesion between the lower layer and the upper layer of the container is less than the other sections of the middle section of the packaging material where it is in contact with the food.
In a possible embodiment of the invention, the cylinder that allows the chemical material to reach the packaging material in the process applies chemical substance to the middle section of the packaging material where it is in contact with the food less than the other sections. A possible embodiment of the invention is that the density of the chemical substance in the middle section where the packaging material is in contact with the food is less than the other parts at a value between 30% and 60% by weight.
BRIEF DESCRIPTION OF DRAWINGS
The schematic view of the inventive packaging material is given in Figure 1 .
REFERENCE NUMBERS
1 Packaging Material
10 Middle Section
11 Adhesive Section
DETAILED DESCRIPTION OF THE INVENTION
In this detailed description, the subject of the invention relates to a packaging material (1) with reduced use of chemical substance suitable for containers used for the storage of yoghurt, fruit yoghurt, water or similar products, it is described by means of examples only for clarifying the subject matter such that no limiting effect is created.
In the state of the art, packaging materials (1) used in the storage of products such as yoghurt, fruit yoghurt and water contain aluminum and polyethylene terephthalate materials in certain proportions by weight.
The aluminum material is in the form of foil and is laminated in the upper/lower layers by means of bonding the same with PET polymer with glue. Aluminum material is found on the upper layer of said laminated product and there is a print on said aluminum layer related to the product. It is provided to keep the food in the container ideally by means of the superior properties of the aluminum material on the upper section.
On the bottom layer of the laminated packaging material (1) there is PET polymer material. The most important advantage of PET polymer for the packaging material (1) is to close the pores of the aluminum layer having thin thickness, at the same time to protect the same from necessary corrosive effects and to provide the required strength. As known in the state of the art, the necessary chemical adhesive materials and thermolacquer process is applied so as to ensure the packaging material (1) to the container that contains food. The thermolacquer process is applied to the PET polymer in the lower layer of the laminated packaging material (1). Thermolacquer process is applied to every region of the lower layer of the laminated product and the chemical materials used in the thermolacquer process are in contact with the food in this manner. It is inevitable for chemical materials to penetrate in the food in long-term storage. As shown in Figure 1 , the adhesive section (11) of the packaging material (1) and the upper cover section of the container are in contact.
The packaging material (1) obtained in the invention is a laminated product wherein aluminum is placed on the upper layer and PET polymer is positioned in the lower layer; the thermolacquer process that allows the same to adhere to the container that stores food to the lower layer of the packaging material (1). The innovation of our invention is that the thermolacquer process is not applied to every region of the lower section of the packaging material (1). The middle section (10) of the packaging material (1), that is, the section in contact with the food within the container, contains less chemical substance than the other sections of the packaging material (1) with the design made in the manufacturing process. For example, the middle section (10) of the packaging material (1) contains less concentrated chemicals than the adhesive section (11).
The thermolacquer material mentioned in the invention is made in a printing machine with the rotogravure process. As known in the state of the art, the packaging material (1) enters the cliche cavities of the printing machine, and the cylinder and thermolacquer materials contact with the packaging material (1). The entire surface of the cylinders in the machine is coated with thermolacquer material in the art. In case the entire surface of the cylinder is coated with thermolacquer material and comes into contact with the packaging material (1), the thermolacquer material reaches to wherever the cylinder touches. The cylinder in the invention is designed in a manner such that no thermolacquer material reaches to the middle section (10) of the packaging material (1). Said design essentially prevents the thermolacquer material from reaching in a section of the cylinder.
The thermolacquer material used in the invention is solvent-based, and contains a maximum of 10 ppm/m2 solvent residue in the packaging material (1) produced under normal production conditions measured with gas chromatography. Said residue can be caused by the adhesives and solvents used during printing. In the middle section (10) of the packaging material (1) obtained in the invention, the ratio of this residue is reduced by a value between 30% and 60%. Therefore, the interaction of the chemical substance with the middle section (10) of the packaging material (1) obtained that is in contact with the food is reduced.
Another benefit of the invention is that a lower cost packaging material (1) is obtained by using less adhesive chemicals.
The protection scope of the invention is specified in the appended claims and cannot be limited to the description made for illustrative purposes in this detailed description. Likewise, it is clear that a person skilled in the art can present similar embodiments in the light of the above descriptions without departing from the main theme of the invention.

Claims

1. A laminated packaging material (1) that is engaged with the upper section of the containers used for packaging of glass water, fruit yoghurt and similar products and plays an active role in retaining the same; preferably comprises PET polymer in the lower layer and aluminum material in the upper layer, characterized in that, said packaging material (1) is configured in a manner such that the density of the chemical material used in the thermolacquer process that will provide adhesion between the lower layer and the upper layer of the container is less than the other sections of the middle section (10) of the packaging material (1) where it is in contact with the food.
2. Thermolacquer process applied to the lower layer of the laminated packaging material (1) that connects with the upper part of the containers used in the packaging of glass water, fruit yoghurt and similar products and plays an active role in preserving the same, characterized in that, in said thermolacquer process, the cylinder that allows the chemical material to reach the packaging material (1) in the process applies chemical substance to the middle section (10) of the packaging material (1) where it is in contact of with the food less than the other sections.
3. Thermolacquer process according to claim 2, characterized in that, the density of the chemical substance in the middle section (10) where the packaging material (1) is in contact with the food is less than the other parts at a value between 30% and 60% by weight.
PCT/TR2020/051461 2020-02-21 2020-12-30 A package material with reduced chemical substance usage WO2021167561A1 (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
TR202002678 2020-02-21
TR2020/02678 2020-02-21

Publications (1)

Publication Number Publication Date
WO2021167561A1 true WO2021167561A1 (en) 2021-08-26

Family

ID=77391521

Family Applications (1)

Application Number Title Priority Date Filing Date
PCT/TR2020/051461 WO2021167561A1 (en) 2020-02-21 2020-12-30 A package material with reduced chemical substance usage

Country Status (1)

Country Link
WO (1) WO2021167561A1 (en)

Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US5800724A (en) * 1996-02-14 1998-09-01 Fort James Corporation Patterned metal foil laminate and method for making same
WO2017089919A1 (en) * 2015-11-25 2017-06-01 Soremartec S.A. Process for packaging a foodstuff product, and wrapping sheet used in the process
US20170355509A1 (en) * 2014-12-18 2017-12-14 Kuo Hsiang Tzu Pressure auto-adjusting package for heated food

Patent Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US5800724A (en) * 1996-02-14 1998-09-01 Fort James Corporation Patterned metal foil laminate and method for making same
US20170355509A1 (en) * 2014-12-18 2017-12-14 Kuo Hsiang Tzu Pressure auto-adjusting package for heated food
WO2017089919A1 (en) * 2015-11-25 2017-06-01 Soremartec S.A. Process for packaging a foodstuff product, and wrapping sheet used in the process

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