Trendsetter with the edge in know-how

Barrier technology

Modern consumer demands for longer product shelf lives without preservatives while providing good product protection are increasing. Greiner Packaging has followed the trend and is investing heavily in developing barrier technologies for plastic food packaging. This technique involves layers of various materials that protect the filling. By placing a great deal of value on having a wide range of offerings of plastic food packaging for different target groups, Greiner Packaging has succeeded in driving a variety of different barrier technologies forward 

IBT IBT (inert barrier technology)
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IBT (inert barrier technology)
= barrier through coating

Cups are placed in a chamber, which is then placed under vacuum. Afterwards, oxygen and a gas containing silicon are piped into the chamber and a plasma is generated using an electrode. This produces a wafer-thin silicon oxide coating on the cups.

The barrier layer is flexible and can undergo sterilization and pasteurization. It has no effect on the transparency or weight of the cup – an important factor with respect to logistics and CO2 emissions. The coating of this type of plastic food packaging has no effect on disposal or recycling, either.

MBT MBT Multi Barrier Technology
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MBT (multi barrier technology)
= barrier through several layers

A greater oxygen barrier can be achieved by embedding a special barrier layer such as EVOH or PA into a standard plastic, such as PP or PET. The filling requirements can be addressed individually, depending on the plastic systems chosen.

This plastic food packaging technology is used for extrusion, sheet extrusion with subsequent thermoforming for cups and bowls as well as for injection strech blow molding for bottles and containers. Multi barrier technology allows the production of highly transparent products while at the same time offering the possibility of hot filling - a clear advantage over other packaging solutions on the market.

State-of-the-art machines worldwide

Production technology

The wide product portfolio of Greiner Packaging is based on a number of plastic packaging production technologies. This technological versatility ensures that our customers receive objective advice ideally tailored to their individual plastic packaging technologies needs. All of these plastic packaging technologies are available to both multinational and domestic clients. 

This technological diversity of plastic packaging products is continuously being expanded through regular investments, benefiting all of our customers in need of highly diversified plastic packaging technologies.

Sheet extrusion Sheet extrusion
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Sheet extrusion

Plastic granulate is melted and forced through a shaping nozzle to become a thermoelastic sheet, which is then rolled up after cooling. The manufacturing equipment allows the production of multi-layer sheets. A recycling film can be incorporated in the middle layer.

Materials used: primarily PP and PS

Thermoforming Thermoforming
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Thermoforming

The extruded film is fed from the roll to the thermoforming machine where it is heated. The thermo-elastic sheet is then stretched forward in the tool and molded by compressed air, cooled down and punched.

The cups are ejected and stacked, then further processed or packed, depending on the respective application. The skeleton sheet is ground right at the machine and later processed as raw material into the middle layer during sheet extrusion. 

Materials used: thermoelastic sheets made of PS, PP, PET, R-PET

Products: e.g., yogurt cups, butter dishes, lids, and trays 

Injection molding Injection molding
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Injection molding

Plastic granulate is smelted, injected into the desired shape under pressure, cooled, and automatically extracted or ejected.  Almost every shape, even those with undercuts, can be manufactured using the injection molding procedure. 

Materials used: primarily PP, PS, PE, PA and PC

Products: primarily special packaging

Blow molding Blow molding
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Blow molding

A tube is extruded, cut off, and transferred to a shaping tool where it is inflated with compressed air. 

Materials used: PE, in particular

Products: bottles, canisters, cans

Injection stretch blow molding Injection stretch blow molding
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Injection stretch blow molding

The granulate is smelted and injection-molded into a preform that already has the finished opening of the product. The preform is then stretched forward in a second tool and, using high pressure, blown into the blow molds for the finished product. Injection and blowing are done as part of a process, so that the residual heat in the preform can be used efficiently. 

Materials used: primarily PP and PS.

Products: 5-gallon water bottles (BPA-free), spice jars, tubes for mustard, baby bottles (BPA-free)

Among all plastic packaging technologies used, Kavoblow is an in-house development of an injection blow molding machine. The linear movement of the preform, from the injection molding machine to the blowing station, makes it possible to use tools on this machine with a higher number of cavities. 

Materials used: PET, PP

Products: primarily honey, sauce and mouthwash bottles, cleaning agents, etc.

The ideal packaging solution

Decoration

The outer appearance of a product – the plastic packaging design – determines the attention it commands on the store shelf. Along with the shape, the artwork also plays a critical role in the decision to purchase. Creativity, along with quality and functionality, are the prerequisites for successful decorative plastic packaging design solutions. Greiner Packaging combines all these components in its extensive range of decorative artwork. Perhaps our greatest strength lies in premium decorative plastic packaging design solutions.

In-Mold Labeling IML In-Mold Labeling IML
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In-Mold Labeling IML

A label is placed in the injection molding tool in which the product is shaped, inseparably linking it to the finished part. Shaping and decorating are done in a single step in this decoration method. The quality of the label surfaces can be matte, rough, shiny or soft to the touch. This procedure allows the entire outer contour of the product to be decorated in photo quality.

K3® cardboard-plastic-combination K3® cardboard-plastic-combination
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K3® cardboard-plastic-combination

A cardboard wrap, possibly made of recycled paper, is placed on a plastic cup. The exterior and interior of the wrap can be printed in photo quality. It is also possible to make the filling visible by having windows in the cardboard wrap or by not having the wrap cover the entire height of a transparent cup. Using the cardboard wrap greatly reduces the plastic content compared to conventional containers. It is even possible to deform the wrap in the third dimension (K3®-D). K3® cups are also available as multipacks.

Sleeving Sleeving
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Sleeving

A sleeve (thin plastic sleeve) is placed on the cup with this mode of plastic packaging design. Steam heating or an electric radiant heater is used to shrink the sleeve to the shape of the article. Sleeves can go over the shoulder of the article and be applied to round and non-round parts. Sleeve materials used include PET, OPS or PVC. Special shapes can also be decorated using sleeves.

Printing Printing
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Printing

Color is applied directly to the base material. A number of plastic packaging design technologies are available, depending on the design, material, and cup shape. 

Dry offset printing:
This indirect flat printing process involves applying the ink to a rectangular plate using a rubber blanket. This transfers the color to the product. Up to 8 inking units can be used here. 

Screen printing:
Using a rubber squeegee, up to 8 colors are pressed through a screen onto the print media. The high color application layer ensures particularly long-lasting image durability. 

All 6 colors used in screen printing can be printed with metallic effect. Metallic printing is possible on soft touch as well as glossy surfaces. The elegant appearance of metallic printing makes it an attractive decorative variant, particularly for premium plastic packaging products.

Pad printing:
A pad gets ink from an inked plate and transfers it onto the article being printed. Up to four colors are applied consecutively onto the base material.

Pre-printed sheet:
A flat sheet is printed with up to ten colors in rotogravure or flexo printing. The printed sheet is then processed into lids in the thermoforming process.

Labeling Labeling
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Labeling

The label is pre-printed in rotogravure or offset printing (photo quality).

The label is automatically affixed to the product using a labeling system. This decoration procedure also makes it possible to decorate corners and edges.

Hot stamping Hot stamping
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Hot stamping

This relief printing procedure involves hot-stamping a coated sheet onto the product.