Flexibele verpakking aluminiumfolie

What is flexible packaging aluminum foil

Flexibele verpakking aluminiumfolie is een dunne folie gemaakt van aluminium die veel wordt gebruikt in voedselverpakkingen en farmaceutische verpakkingen. In tegenstelling tot harde aluminiumfolie, flexibele verpakking aluminiumfolie is zacht en kan zich aanpassen aan verschillende vormen van containers, daarom wordt het veel gebruikt voor het verpakken van voedsel en medicijnen.

Flexible packaging aluminum foil is characterized by good airtightness and water resistance, which can protect food and medicine from oxygen ingress and moisture volatilization, thereby prolonging the freshness of food and the shelf life of medicines. In aanvulling, flexibele verpakking aluminiumfolie heeft ook corrosieweerstand en lichtafschermende eigenschappen, die kunnen voorkomen dat voedsel en medicijnen worden aangetast door foto-oxidatie en hun oorspronkelijke kwaliteit behouden.

Een ander voordeel van flexibel verpakken van aluminiumfolie is dat het gemakkelijk mee te nemen en te openen is, wat handig is voor de consument om te gebruiken. Tegelijkertijd, flexibele verpakking aluminiumfolie kan ook verschillende patronen en karakters afdrukken, wat de esthetiek van het product en de merkwaarde kan verhogen.

In het kort, flexibele verpakking aluminiumfolie is een hoogwaardig verpakkingsmateriaal voor voedingsmiddelen en farmaceutische producten, wat de voordelen van luchtdichtheid heeft, waterbestendigheid, corrosiebestendigheid en lichte schaduw, die de versheid en kwaliteit van producten kunnen beschermen, en tegelijkertijd het gebruik van consumenten vergemakkelijken en de esthetiek van producten vergroten.

Alloys of flexible packaging aluminum foil

De aluminiumfolielegeringen die voor flexibele verpakkingen zijn geselecteerd, zijn voornamelijk 1000 serie en 8000 serie. Vanuit het oogpunt van compositie, 1000 serie bevat meer andere legeringscomponenten dan 8000 serie. Daarom, op het gebied van de verwerkbaarheid van aluminiumfolie voor flexibele verpakkingen, de optreden van 8000 serie aluminiumfolie zal beter zijn.

Het is superieur en heeft een betere verwerkbaarheid dan de 1000 serie. Onder hen, 8011, 8021, En 8079 aluminiumfolies zijn de belangrijkste producten van de 8000 serie aluminiumfolies. Met hun uitstekende afdichting, plasticiteit, en corrosiebestendigheid, ze worden veel gebruikt in voedsel, dranken, en sigaretten. In de verpakking van medicijnen, huishoudelijke producten en andere producten.

Characteristics of flexible packaging aluminum foil

Sealing: The crystal structure of metal provides high barrier properties. Bijvoorbeeld, aluminum foil has a thickness of 6.3~9µm and is usually used for compounding with materials such as film or paper to achieve better strength and sealing.

Light shielding: Aluminum foil is a solid metal that can block visible light (including ultraviolet light).

Stability: Except for acids and alkalis, it has high stability to most substances.

Non-absorbent: Does not absorb lipids, oliën, water and other liquids.

Hygiene and safety: After the entire production process of aluminum foil is completed, the finished aluminum foil has been sterilized and can be shipped in a sterile state. Aluminum foil is safe for food contact and will not cause bacterial growth.

Food contact: European standard EN602 aluminum foil packaging can contact food, and western aluminum foil is usually used for packaging of food, medicine and cosmetics.

Taste, Smell: Aluminum foil is a tasteless, odorless product.

Recyclebaar: Aluminum can be recycled without compromising quality. Using modern separation technology, aluminum can be separated and utilized from daily necessities.

Fully folded: After the aluminum is fully annealed, it returns to a fully soft state and can maintain a good shape after forming.

Plasticiteit: Aluminum has very good plasticity and can produce large deformations without affecting its barrier properties.

Corrosieweerstand: In the natural state, aluminum will form an oxide film under the action of oxygen, which plays a good shielding role. Aluminum is also stable in the range of pH 4-9.

Reflectiviteit: The reflectivity of radiant heat and light is 98%. The reflectivity of both sides of the aluminum foil is the same.

Production process of flexible packaging aluminum foil

The production process of flexible packaging aluminum foil usually includes the following key links: blank material selection, aluminum foil rolling, slitting, cleaning and disinfection, enz.

Below we will introduce the specific steps and key points in these links in detail.

Selection of raw material

The raw materials (blanks) for producing aluminum foil are mainly divided into cast-rolled blanks and hot-rolled blanks. Compared with hot-rolled blanks, the quality of cast-rolled blanks is more difficult to control. Since the deformation of aluminum foil rolled with cast-rolled billets is much smaller, the quality of cast-rolled billets, such as air passages, inclusions, segregation, coarse grains and other defects, have a more direct impact on aluminum foil rolling. The following figure shows different blanks. The crystal image level of the material.

Rolling process

The main rolling equipment for aluminum foil includes: rough rolling mill, intermediate rolling mill, coiler, and finishing mill; decoilers, shears, annealing furnaces, enz. in subsequent processes; and grinders for regular processing and maintenance of the pressure rollers. There are also equipment customized by each manufacturer according to the product varieties and specifications it produces.

Aluminum foil calendering production process:

Aluminum foil rough, medium and finish rolling mills are mainly divided according to the thickness range of the product, and their corresponding control modes are different.

Rough rolling: minimum exit thickness: 0.02~0.04mm, mainly based on roll gap position control and post-tension control;

Intermediate rolling: minimum exit thickness: 0.01mm, with tension control as the main focus;

Finish rolling: minimum exit thickness: 0.004.4*2mm, mainly controlled by speed and post-tension;

Slitting: According to the needs, the fine-rolled double aluminum foil is slit into finished aluminum coils of different diameters and widths, generally divided into 3-inch and 6-inch inner diameters;

Quenching: Over het algemeen, an electric-heated positive pressure or negative pressure annealing furnace is used, and different annealing temperatures and times are set as needed to recrystallize the aluminum foil to achieve the purpose of removing oil and re-establishing performance.

Snijden

The rolled aluminum foil is usually larger, which is not conducive to packaging and use. Daarom, slitting is required during the production process. Slitting is the use of professional equipment to cut large pieces of aluminum foil into small pieces of various sizes according to requirements. Precision and efficiency must be paid attention to during the slitting process to ensure the smooth progress of the subsequent production process.

Classification of aluminum foil for flexible packaging

Flexible packaging aluminum foil mainly uses the metallic luster, light barrier, air barrier and certain strength and ductility of aluminum foil. Volgens verschillende toepassingen, the emphasized performance is also different. Aluminum foil for flexible packaging can be divided into three categories according to the use:

The first category, food and drug packaging, is mainly sealed, mainly emphasizing gas barrier properties, light barrier properties, and non-toxicity. This kind of aluminum foil includes: packaging of medicines and quasi-drugs (medische apparatuur, medical supplies), 0.02MM, 0.015MM, 0.009MM, 0.007MM.

Food, quasi-food (toothpaste) verpakking, 0.015, 0.012, 0.009, 0.007MM.

The second category, decoratie, mainly focuses on aesthetics, emphasizing uniform surface gloss. This kind of aluminum foil includes: various printing outer packaging, advertising.

The third category, between the first and second categories, requires both a certain degree of sealing and a certain degree of aesthetics. Mainly cigarettes, alcohol, de verpakking van levensmiddelen.

Common requirements for flexible packaging aluminum foil

• ● The common requirement for flexible packaging aluminum foil is a flat shape (less than 20Ⅰ);
• ● Uniform surface;
• ● Consistent thickness (3% tolerantie);
• ● Good expandability (less than three meters);
• ● Clean surface;
• ● Fewer pinholes;
• ● Few but strong joints (less than 20%);
• ● Appropriate mechanical properties.

Flexible packaging aluminum foil application

Medicine package	Coffee packaging	Food vacuum packaging
Tissue packaging	De verpakking van levensmiddelen	Jam packaging

Several problems with flexible packaging aluminum foil

Flexible packaging aluminum foil currently has several issues to be resolved.

● The uniformity of the surface condition of flexible packaging aluminum foil is too expensive. If a good surface is required, the production cost will increase significantly. So far, there is no good solution.

● As a product of extreme thickness, aluminum foil almost exhausts all its plasticity. The reworkability of flexible packaging aluminum foil is not high, despite the use of new alloys and processes, (eg: 8011, 8079). There is still no good way to significantly improve plasticity. Echter, the method of flexible packaging compound bag-making processing has less consideration for this aspect, so that bursting often occurs.

● De index voor het meten van de plasticiteit van aluminiumfolie is onwetenschappelijk en kan de plasticiteit van aluminiumfolie niet echt weergeven. De prestaties van flexibele aluminiumfolieverpakkingen bevinden zich nog in de testfase. Zonder wetenschappelijke indicatormeting, productie-inspectie kan niet worden uitgevoerd.

● Wetenschappelijke selectie van dikte, redelijke composiettechnologie, en ondersteunende materialen zijn net zo belangrijk als de prestaties van de aluminiumfolie zelf. Een redelijke afstemming kan niet alleen de productkwaliteit stabiliseren, maar ook de kosten verlagen.

What flexible packaging foil huawei supply

Als fabrikant met meer dan 20 Jarenlange ervaring in de productie van aluminiumfolie, Huawei Aluminium levert hoogwaardige aluminiumfolie in diverse legeringen. Hieronder volgen de flexibele verpakkingsaluminiumfolies die wij vaak leveren:

Legering: 1100 aluminiumfolie, 1235 aluminiumfolie, 8011 aluminiumfolie, 8021 aluminiumfolie, 8079 aluminiumfolie

Dikte: 0.005mm – 0.020mm

Breedte: Maximum 1850mm

ID kaart: 3″ (76mm) or 6″ (152mm)

Common applications: vacuum packaging bags, sigaretten verpakking, Tetra Pak-verpakking, zakken voor voedselverpakkingen, isolatie materialen, retortzakken, enz.