WO2022066113A1 - Strip production method for aseptic packaging technique - Google Patents

Strip production method for aseptic packaging technique Download PDF

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Publication number
WO2022066113A1
WO2022066113A1 PCT/TR2020/051409 TR2020051409W WO2022066113A1 WO 2022066113 A1 WO2022066113 A1 WO 2022066113A1 TR 2020051409 W TR2020051409 W TR 2020051409W WO 2022066113 A1 WO2022066113 A1 WO 2022066113A1
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Prior art keywords
products
aseptic packaging
layer
packaging
production method
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Application number
PCT/TR2020/051409
Other languages
French (fr)
Inventor
Uğur Yildirim
Original Assignee
Beşel Basim Sanayi̇ Ve Ti̇caret Anoni̇m Şi̇rketi̇
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Publication of WO2022066113A1 publication Critical patent/WO2022066113A1/en

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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
    • 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
    • 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
    • B32B27/34—Layered products comprising a layer of synthetic resin comprising polyamides
    • 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
    • B65D75/40—Packages formed by enclosing successive articles, or increments of material, in webs, e.g. folded or tubular webs, or by subdividing tubes filled with liquid, semi-liquid, or plastic materials
    • B65D75/44—Individual packages cut from webs or tubes
    • B65D75/48—Individual packages cut from webs or tubes containing liquids, semiliquids, or pastes, e.g. cushion-shaped packages
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
    • B29C48/00—Extrusion moulding, i.e. expressing the moulding material through a die or nozzle which imparts the desired form; Apparatus therefor
    • B29C48/022—Extrusion moulding, i.e. expressing the moulding material through a die or nozzle which imparts the desired form; Apparatus therefor characterised by the choice of material
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
    • B29C48/00—Extrusion moulding, i.e. expressing the moulding material through a die or nozzle which imparts the desired form; Apparatus therefor
    • B29C48/03—Extrusion moulding, i.e. expressing the moulding material through a die or nozzle which imparts the desired form; Apparatus therefor characterised by the shape of the extruded material at extrusion
    • B29C48/09—Articles with cross-sections having partially or fully enclosed cavities, e.g. pipes or channels
    • B29C48/10—Articles with cross-sections having partially or fully enclosed cavities, e.g. pipes or channels flexible, e.g. blown foils
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29K—INDEXING SCHEME ASSOCIATED WITH SUBCLASSES B29B, B29C OR B29D, RELATING TO MOULDING MATERIALS OR TO MATERIALS FOR MOULDS, REINFORCEMENTS, FILLERS OR PREFORMED PARTS, e.g. INSERTS
    • B29K2023/00—Use of polyalkenes or derivatives thereof as moulding material
    • B29K2023/04—Polymers of ethylene
    • B29K2023/06—PE, i.e. polyethylene
    • B29K2023/0608—PE, i.e. polyethylene characterised by its density
    • B29K2023/0625—LLDPE, i.e. linear low density polyethylene
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29K—INDEXING SCHEME ASSOCIATED WITH SUBCLASSES B29B, B29C OR B29D, RELATING TO MOULDING MATERIALS OR TO MATERIALS FOR MOULDS, REINFORCEMENTS, FILLERS OR PREFORMED PARTS, e.g. INSERTS
    • B29K2023/00—Use of polyalkenes or derivatives thereof as moulding material
    • B29K2023/04—Polymers of ethylene
    • B29K2023/06—PE, i.e. polyethylene
    • B29K2023/0608—PE, i.e. polyethylene characterised by its density
    • B29K2023/0633—LDPE, i.e. low density 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
    • B32B2250/00—Layers arrangement
    • B32B2250/24—All layers being polymeric
    • 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
    • B32B2250/44—Number of layers variable across the laminate
    • 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
    • B32B2270/00—Resin or rubber layer containing a blend of at least two different polymers
    • 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
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
    • Y02W—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO WASTEWATER TREATMENT OR WASTE MANAGEMENT
    • Y02W30/00—Technologies for solid waste management
    • Y02W30/50—Reuse, recycling or recovery technologies
    • Y02W30/80—Packaging reuse or recycling, e.g. of multilayer packaging

Definitions

  • the present invention relates to the strip production method convenient for aseptic packaging technique that is developed to be used in the aseptic packaging of a diverse range of products in the food sector, particularly milk and various dairy products, as well as fruit juices and pulps, sauces, soups, infant formulas, tomato paste, puddings, teas, soy products, various beverages, and the like, and that enables extending products’ shelf lives.
  • Packaging “protection of food from external factors”, is defined as the process of wrapping food with materials that partially or completely prevent the change of the qualities of food from production stage until consumption and that can attract buyers’ attention with their color and shape.
  • Packaging should be produced in a way that best preserves the physical, chemical, microbiological, and sensory properties of food and should be designed in accordance with the characteristics of different foods. In other words, packaging should be able to protect the food throughout the entire food production and consumption process from transportation and storage in warehouses/shops to preservation at home by the end-users.
  • packaging materials such as metal, glass, plastic, paper, etc. depending upon the structure and characteristics of the type of food.
  • the selected packaging material should be suitable for the relevant food product; it should not react with the content and not be altered by or not cause alterations in the food. Apart from this, packaging materials should not contain any harmful and toxic substances and should have sufficient physical strength against external factors. The environmental friendliness of the material and its recyclability are also crucial factors in choosing food packaging material.
  • Aseptic packaging is one of the food packaging techniques known and used in the food industry. Aseptic packaging is an application that involves filling the product, which has been made “commercially sterile” through firstly being heated and subsequently being cooled in sterile conditions, into sterile packages under sterile conditions, and sealing the packaging hermetically so that it does not cause re-contamination. Aseptic packaging technology has two known specific areas of use:
  • Plastic forming methods are employed as part of the known plastic packaging production techniques.
  • Plastic extrusion is one of these methods.
  • Extrusion is the process of creating a continuous fixed cross-sectional product by applying pressure to the material placed in a closed chamber, thereby forcing it to flow through and take the shape of a die. This method ensures continuous production after which the manufactured product is cut in the desired length.
  • Extrusion machines are utilized to turn various types of plastic materials, which are selected for each application based on their properties, into plastic packaging films by applying a certain procedure after adjusting them to desired dimensions.
  • Plastic blown film machine is one of the known and used extrusion machines for packaging production in the plastic extrusion method. Packaging products obtained after the processing of the plastic packaging material in the extrusion machine are made into strips and then they go through the winding process.
  • Packaging production methods make use of various plastic/polymer materials. These polymers provide significant features to the packaging by forming a barrier film therein at the extrusion stage of the packaging production method. Each polymer has its own physical and chemical properties and processing characteristics, and they differ also in terms of cost. A polymer material can be used either on its own or in combination with other plastic materials or with materials such as aluminum and paper. Polyethylene (PE) is one of the known and most used polymers as part of these production methods.
  • PE Polyethylene
  • polyamide Another polymer utilized in packaging production is polyamide.
  • Polyamides can be either found naturally or produced synthetically.
  • Polyamides with high heat resistance guarantee resistance to chemicals and aromas in packaging by providing an excellent oxygen barrier.
  • packaging production method by way of plastic extrusion benefits from many plastic/polymer materials such as ethylene-vinyl alcohol (EVOH), polycarbonate (PC), polyethylene terephthalate (PET), polypropylene (PP), and polyvinyl chloride (PVC).
  • EVOH ethylene-vinyl alcohol
  • PC polycarbonate
  • PET polyethylene terephthalate
  • PP polypropylene
  • PVC polyvinyl chloride
  • the walls comprise at least one layer made of metalized heat-sealable plastic material or one layer with barrier effect and at least one layer made of heat-sealable plastic material.
  • the peripheral heat-sealing line is provided at the cutting edge of the walls so as to form an encapsulation of the coupled layers at the cutting edge, due to overflow of the plastic material.”
  • the invention describes an aseptic packaging production method using nylon or ethylene-vinyl alcohol (EVOH) as a polymer material.
  • the present invention relates to the strip production method convenient for aseptic packaging technique that is developed to be used in the aseptic packaging of a diverse range of products in the food sector, particularly milk and various dairy products, as well as fruit juices and pulps, sauces, soups, infant formulas, tomato paste, puddings, teas, soy products, various beverages, and the like, and that enables extending products’ shelf lives.
  • the aim of the invention is to extend products’ shelf lives by way of the strip production method convenient for the aseptic packaging technique employed in the food sector packaging.
  • Another aim of the invention is to ensure that the film has a barrier property thanks to the use of polyamide in the film.
  • a further aim of the invention is to provide recyclable products with this method.
  • Another aim of the invention is to guarantee a system that consumes less energy than other systems and is, therefore, an environmentally friendly method of production.
  • Another aim of the invention is to enable, in aseptic packaging, the use of plastic packaging material that cannot show resistance to the high sterilization temperatures applied in traditional food preservation processes, thereby making the employed plastic packaging material in aseptic packaging highly reliable in terms of food safety and protecting human health.
  • a 5-layer film is firstly generated according to the percentages given below by use of the blown film machine and then it is turned into a single-layer film. Layers are adjusted in line with the physical properties of raw materials and screw diameters.
  • the numbers 1 , 2, 3, 4, and 5 refer to extruders. Each extruder has six different dosing. In the preferred application of the invention, dosing of four materials is applied since a maximum of four different raw materials are supplied to each extruder, and the other doses, i.e., K5 and K6, are not used because the variety of types of raw materials are limited to four.
  • Masterbatch is a solid additive for plastics developed to be used to color plastics or to impart other properties to plastics.
  • LDPE low density polyethylene
  • LLDPE maleic anhydride
  • Polyamide 6 is used to prepare the third layer in the extruder.
  • 80-90% LDPE and 10-20% LLDPE (maleic anhydride) are used to prepare the fourth layer in the extruder.
  • mLLDPE 85-95% mLLDPE, 3-5% slip masterbatch, 3-7% plastomer and mLLDPE, and 0.5-1.5% antistatic masterbatch are used to prepare the fifth layer in the extruder.
  • Air system height 152 mm
  • corona treatment is applied at the first extruder.
  • Corona treatment is exercised in order to prepare film and various surfaces for printing or adhesion.
  • Corona unit applies electrical power to the surface to be worked on, thereby roughening the surface and allowing it to better hold onto the ink or glue.
  • the film obtained in strips in foils from the blown film machine is wound with the help of a spool winding machine.
  • the invention comprises the following steps:

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  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Wrappers (AREA)
  • Dairy Products (AREA)
  • Tea And Coffee (AREA)

Abstract

The present invention relates to the strip production method convenient for aseptic packaging technique that is developed to be used in the aseptic packaging of a diverse range of products in the food sector, particularly milk and various dairy products, as well as fruit juices and pulps, sauces, soups, infant formulas, tomato paste, puddings, teas, soy products, various beverages, and the like, and that enables extending products' shelf lives.

Description

STRIP PRODUCTION METHOD FOR ASEPTIC PACKAGING TECHNIQUE
TECHNICAL FIELD
The present invention relates to the strip production method convenient for aseptic packaging technique that is developed to be used in the aseptic packaging of a diverse range of products in the food sector, particularly milk and various dairy products, as well as fruit juices and pulps, sauces, soups, infant formulas, tomato paste, puddings, teas, soy products, various beverages, and the like, and that enables extending products’ shelf lives.
BACKGROUND ART
Today, it has become increasingly difficult to create a difference between products and influence consumers’ buying decisions due to the increasing competition between products manufactured on an industrial scale and the growing variety of products. Package/packaging has become much more important in regards to industrial products with the increased social awareness, enhanced attention to health conditions, consumer satisfaction being prioritized, and the obligation imposed upon manufacturers to protect consumer rights.
Packaging, “protection of food from external factors”, is defined as the process of wrapping food with materials that partially or completely prevent the change of the qualities of food from production stage until consumption and that can attract buyers’ attention with their color and shape. Packaging should be produced in a way that best preserves the physical, chemical, microbiological, and sensory properties of food and should be designed in accordance with the characteristics of different foods. In other words, packaging should be able to protect the food throughout the entire food production and consumption process from transportation and storage in warehouses/shops to preservation at home by the end-users. There are a variety of food packaging materials known today. Manufacturers employ packaging materials such as metal, glass, plastic, paper, etc. depending upon the structure and characteristics of the type of food. The selected packaging material should be suitable for the relevant food product; it should not react with the content and not be altered by or not cause alterations in the food. Apart from this, packaging materials should not contain any harmful and toxic substances and should have sufficient physical strength against external factors. The environmental friendliness of the material and its recyclability are also crucial factors in choosing food packaging material.
Currently, the industry offers several packaging systems. Packaging methods such as aseptic packaging, vacuum packaging, modified atmosphere packaging, etc. can be selected in consideration of the structure and characteristics of the food. Aseptic packaging is one of the food packaging techniques known and used in the food industry. Aseptic packaging is an application that involves filling the product, which has been made “commercially sterile” through firstly being heated and subsequently being cooled in sterile conditions, into sterile packages under sterile conditions, and sealing the packaging hermetically so that it does not cause re-contamination. Aseptic packaging technology has two known specific areas of use:
- Packaging of pre-sterilized and sterile products (milk, fruit juice, soup, sauce, dessert, etc.)
- Packaging of non-sterilized products (such as yogurt) to avoid microorganism infection
Plastic forming methods are employed as part of the known plastic packaging production techniques. Plastic extrusion is one of these methods. Extrusion is the process of creating a continuous fixed cross-sectional product by applying pressure to the material placed in a closed chamber, thereby forcing it to flow through and take the shape of a die. This method ensures continuous production after which the manufactured product is cut in the desired length. Extrusion machines are utilized to turn various types of plastic materials, which are selected for each application based on their properties, into plastic packaging films by applying a certain procedure after adjusting them to desired dimensions. Plastic blown film machine is one of the known and used extrusion machines for packaging production in the plastic extrusion method. Packaging products obtained after the processing of the plastic packaging material in the extrusion machine are made into strips and then they go through the winding process.
Packaging production methods make use of various plastic/polymer materials. These polymers provide significant features to the packaging by forming a barrier film therein at the extrusion stage of the packaging production method. Each polymer has its own physical and chemical properties and processing characteristics, and they differ also in terms of cost. A polymer material can be used either on its own or in combination with other plastic materials or with materials such as aluminum and paper. Polyethylene (PE) is one of the known and most used polymers as part of these production methods.
There are different types of polyethylene as seen below:
- HDPE (High-density polyethylene)
- LDPE (Low-density polyethylene)
- LLDPE (Linear low-density polyethylene)
- mLLDPE (Metallocene linear low-density polyethylene)
Another polymer utilized in packaging production is polyamide. Polyamides can be either found naturally or produced synthetically. Polyamides with high heat resistance guarantee resistance to chemicals and aromas in packaging by providing an excellent oxygen barrier.
Apart from these, in the current state of the art, packaging production method by way of plastic extrusion benefits from many plastic/polymer materials such as ethylene-vinyl alcohol (EVOH), polycarbonate (PC), polyethylene terephthalate (PET), polypropylene (PP), and polyvinyl chloride (PVC).
The application numbered TR2014/11943 and titled “Packaging, particularly for aseptically packageable products”, which is mentioned in a state of the art, summarizes the related invention as follows: “A description is given of a package, particularly for aseptic packaging, made up of two opposite facing walls heat-sealed one to the other along a peripheral line. The walls comprise at least one layer made of metalized heat-sealable plastic material or one layer with barrier effect and at least one layer made of heat-sealable plastic material. The peripheral heat-sealing line is provided at the cutting edge of the walls so as to form an encapsulation of the coupled layers at the cutting edge, due to overflow of the plastic material.” The invention describes an aseptic packaging production method using nylon or ethylene-vinyl alcohol (EVOH) as a polymer material.
The file numbered JP2001393706A and titled “Composite film for aseptic packaging”, which is mentioned in another state of the art, summarizes the relevant invention as follows: “The invention aims to provide a composite film suitable for aseptic filling packaging of an automatic bag-making system which is sterilized with a hydrogen peroxide aqueous solution.” The invention mentions a composite film that is benefited from in order to create a barrier for the package against external factors in the aseptic packaging production method.
The existing production methods in the state of the art are insufficient in terms of extending the shelf life of food products, cannot provide a barrier for the packaging against physical and chemical external factors, and are not environmentally-friendly. In conclusion, a novel aseptic packaging production method is needed to eliminate the above-mentioned shortcomings and disadvantages and solve the current problems of the prior art.
DESCRIPTION OF THE INVENTION
Developed to eliminate the above-mentioned disadvantages and bring new advantages to the related technical field, the present invention relates to the strip production method convenient for aseptic packaging technique that is developed to be used in the aseptic packaging of a diverse range of products in the food sector, particularly milk and various dairy products, as well as fruit juices and pulps, sauces, soups, infant formulas, tomato paste, puddings, teas, soy products, various beverages, and the like, and that enables extending products’ shelf lives. The aim of the invention is to extend products’ shelf lives by way of the strip production method convenient for the aseptic packaging technique employed in the food sector packaging.
Another aim of the invention is to ensure that the film has a barrier property thanks to the use of polyamide in the film.
A further aim of the invention is to provide recyclable products with this method.
Another aim of the invention is to guarantee a system that consumes less energy than other systems and is, therefore, an environmentally friendly method of production.
Another aim of the invention is to enable, in aseptic packaging, the use of plastic packaging material that cannot show resistance to the high sterilization temperatures applied in traditional food preservation processes, thereby making the employed plastic packaging material in aseptic packaging highly reliable in terms of food safety and protecting human health.
DETAILED EXPLANATION OF THE INVENTION
This detailed description of the strip production method for aseptic packaging technique subject to the invention is given only to ensure a better understanding of the subject and in a way that will not create any limiting impact.
A 5-layer film is firstly generated according to the percentages given below by use of the blown film machine and then it is turned into a single-layer film.
Figure imgf000006_0001
Layers are adjusted in line with the physical properties of raw materials and screw diameters.
Figure imgf000007_0001
The numbers 1 , 2, 3, 4, and 5 refer to extruders. Each extruder has six different dosing. In the preferred application of the invention, dosing of four materials is applied since a maximum of four different raw materials are supplied to each extruder, and the other doses, i.e., K5 and K6, are not used because the variety of types of raw materials are limited to four.
Masterbatch is a solid additive for plastics developed to be used to color plastics or to impart other properties to plastics.
70-80% mLLDPE, 3-5% slip masterbatch, 15-25% plastomer and mLLDPE, and 0.5- 1 .5% antistatic masterbatch are used to prepare the first layer in the extruder.
80-90% LDPE and 10-20% LLDPE (maleic anhydride) are used to prepare the second layer in the extruder.
100% Polyamide 6 is used to prepare the third layer in the extruder. 80-90% LDPE and 10-20% LLDPE (maleic anhydride) are used to prepare the fourth layer in the extruder.
85-95% mLLDPE, 3-5% slip masterbatch, 3-7% plastomer and mLLDPE, and 0.5-1.5% antistatic masterbatch are used to prepare the fifth layer in the extruder.
These layers are then combined in the blown film machine to form a single film.
Figure imgf000008_0001
Additionally, the operating parameters of the blown film machine are as below:
• Rotator speed: 40%
• External cooling fan: 55%
• Blowing air fan: 48%
• Suction air fan: 53%
• Basket height: 1100 mm
• Air system height: 152 mm
• Productivity: 700 kg/h
• Drawing speed: 38 m/min
• Weight per meter: 303 g/m
6500 W corona treatment is applied at the first extruder. Corona treatment is exercised in order to prepare film and various surfaces for printing or adhesion. Corona unit applies electrical power to the surface to be worked on, thereby roughening the surface and allowing it to better hold onto the ink or glue. Thereafter, the film obtained in strips in foils from the blown film machine is wound with the help of a spool winding machine.
The operating parameters and values of the spool winding machine are as below:
Figure imgf000009_0001
To sum up, the invention comprises the following steps:
- Preparing the 5-layer material in the extruder,
- Turning the 5-layer material into a single layer film in the blown film machine, - Winding the film with the spool winding machine.

Claims

9
CLAIMS The present invention relates to the strip production method for aseptic packaging technique that is developed to be used in the aseptic packaging of a diverse range of products in the food sector, particularly milk and various dairy products, as well as fruit juices and pulps, sauces, soups, infant formulas, tomato paste, puddings, teas, soy products, various beverages, and the like, and that enables extending products’ shelf lives, and its feature is that it includes the following stages:
- Five layers are prepared in the extruder by using mLLDPE, slip masterbatch, plastomer, antistatic masterbatch, LDPE, LLDPE (maleic anhydride), and polyamide 6.
- The 5-layer material is turned into a single layer film in the blown film machine.
- The film is wound with the spool winding machine. The present invention relates to the product manufactured with the strip production method for aseptic packaging technique that is developed to be used in the aseptic packaging of a diverse range of products in the food sector, particularly milk and various dairy products, as well as fruit juices and pulps, sauces, soups, infant formulas, tomato paste, puddings, teas, soy products, various beverages, and the like, and that enables extending products’ shelf lives, and its feature is that it is characterized by the combination of the following layers, prepared in the extruder with the said percentages, using the blown film machine: 70-80% mLLDPE, 3-5% slip masterbatch, 15-25% plastomer and mLLDPE, and 0.5-1.5% antistatic masterbatch for the first layer; 80-90% LDPE and 10-20% LLDPE (maleic anhydride) for the second layer; 100% Polyamide 6 for the third layer; and 80-90% LDPE and 10-20% LLDPE (maleic anhydride) for the fourth layer.
PCT/TR2020/051409 2020-09-22 2020-12-28 Strip production method for aseptic packaging technique WO2022066113A1 (en)

Applications Claiming Priority (2)

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TR2020/15029 2020-09-22
TR2020/15029A TR202015029A2 (en) 2020-09-22 2020-09-22 STRIP PRODUCTION METHOD SUITABLE FOR ASEPTIC PACKAGING TECHNIQUE

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Citations (3)

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WO2002074537A1 (en) * 2001-03-16 2002-09-26 Cryovac, Inc. Coextruded retortable multilayer film
US20060228502A1 (en) * 2005-04-07 2006-10-12 Cryovac, Inc. Sterilizable coextruded film for aseptic packaging
US20090123611A1 (en) * 2007-11-09 2009-05-14 Cryovac, Inc. Printed sterilizable laminate for aseptic packaging

Patent Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2002074537A1 (en) * 2001-03-16 2002-09-26 Cryovac, Inc. Coextruded retortable multilayer film
US20060228502A1 (en) * 2005-04-07 2006-10-12 Cryovac, Inc. Sterilizable coextruded film for aseptic packaging
US20090123611A1 (en) * 2007-11-09 2009-05-14 Cryovac, Inc. Printed sterilizable laminate for aseptic packaging

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