KKT has been producing since 1955 containers by extrusion blow moulding procedure. The process consists in extruding a continuous tube (parison) made of hot mouldable plastic vertically downwards from the so-called “head”.

The two-piece tool which is open at that time closes and encases the tube. Almost simultaneously the mandrel runs into the tube from above and presses compressed air iside. In this way the tube is blown up, pressed against the tool sides and cooled down. The plastic matches the given shape and becomes solid.

KKT has not only a long history and tradition in this process, but has also modern partial all-electric machines. Our product range includes bottles from 5ml up to 1000ml and even up to 5000ml. Innovations, customer-oriented and technical solutions define our image. This is another proof as service provider for our customers.

Beside the usual polyolefines like polypropylene and polyethylene (HDPE and LDPE) we are processing also polyvinyl chloride (PVC) and polyamide.

In addition to the well-known mono processing, KKT offers also co-extrusion blow moulding (COEX) which means the completion of carrier layer with a bonding and a barrier layer (EVOH or PA).

This provides protection against aggressive filling goods in the chemical and technical sector (3 layers). In the food sector the 5/6 layer version with additional PE/PP internal layer is preferred so that the barrier, which is mainly used for a reduction of the oxygen permeation, does not come into contact with foodstuffs.

This process includes the 1-step and 2-step procedures. The 1-step injection stretch blow moulding is similar to the injection blow moulding in the first two stations. But then the preform is not just blown up radially but biaxially (radial and axial). Unlike injection blow moulding thin-walled bottles can be made by this procedure as well.  

KKT mainly uses this unique processing especially for special designs in PET and PP, for very small containers (miniatures) and for wide-mouth containers.

The 2-step stretch blow moulding is basically the same process. The separation of the injection moulding and the stretch blow moulding allows an ecologically valuable separation of both cycles.

Especially for bigger bottles and by using the varied standard neckfinishes KKT offers an optimized cost potential for their customers. Many years of experience in carbonated beverages and the own design development round off our portfolio technically and visually.

The containers made of PET and OPP are highly transparent and mechanically resistant.

This procedure is especially used for the economical production of containers with a precise neck and seal area and with constant wall-thickness. This manufacturing process avoids seams or squeezing edges for small containers (up to 100 ml).  

During the injection blow moulding a cylindrical preform is manufactured by injection moulding. This preform has already the exact neckfinish geometry. In the conditioning station it is thermally moulded to the blowing profile before it is blown up radially in the next station.

This production process offers high quality with and cost effectiveness. Flexible tool engineering guarantees a prompt and efficient implementation even for smaller quantities. The stable containers are made of PP, PE but also of PET.