• Kollmann metals - history

• Products and Service

• Applications

• Brass - High tensile brass

• Copper tin alloys, lead bronze

• Aluminiumbronze - Copper and
  Copper Alloys

• Cill-Mold alloys

• Forms for the glass industry

• Resistance welding

• Tungsten-copper, berylliumfree and
  Nickelalloys

• Copper Alloys for mold construction

• Polyurethan for toolmaking

• Self-lubricating sliding elements

• Drymet

• Plain Bearing

• Self-lubricating spherical bearings

• Bearing for offshore an turbines

• Guide vane casted or forged

• CAROBRONZE Data sheet

• Electric furnaces

• Cu-Material for Erosion

• List for electrolytic copper

• Aluminium rolling and pressing products

• Stainless steel for special applications
  for steel-water and gen. mechan.
  engineering

• Grey and Spheroidal cast iron

• Swing bearing

• Welding Technology for nonferrous
  metals

• Welding additives

• Engineering Plastics

• Building Façade - Architecture

• Profiles

• ENGINEERING

• Parafilropes

• Powerline Construction

• Steel - PTFE - Slide bearing
  technology

• Safety in cable-car construction

• General information

• Certificate TÜV

• REACH regulation

KOLLMANN METALLE

Authorised distributer for Linear Composites Ltd

PARAFIL - ROPES

PARAFILSEILE

Parafilseile sind eine Entwicklung der Firma ICI LINEAR COMPOSITES LIMITED.

Sie sind vielfach verwendbar: bei Abspannungen, für Antennenmaste, Brückenseile, Abspannungen für Kunststoffüberdachungen im Hochbau.

Sie verhindern Verletzungen der Dachhaut.

Anwendung in der Marinetechnik, Offshore, Plantstructures.

Grundlegende Eigenschaften der Parafilseile

Allgemeines:

Parafilseile bestehen aus einem dicht gepackten Kern von hochreißfesten Endlosfaden in einer widerstandsfähigen und dauerhaften Hülle eingebettet. Die so geformten Seile sind leichtgewichtig, dünn und von hoher Festigkeit. Das sie einen außerordentlich hohen Korrosionswiderstand haben, erfordern sie praktisch keine Wartung und vereinen hohen Dehnungswiderstand mit geringem Schrumpf.

Die Festigkeit und der Modul des Parafil werden nicht nur variiert indem man die Menge der Faden im Kern des Seiles verändert, sondern auch indem man die Garnsorte des Faserkernes wechselt. So wird hochreißfestes TERYLENE in der Serie der Type A verwendet und KEVLAR 29 für Type F.

Der Hauptunterschied zwischen den Serien A und F liegt in der Reißfestigkeit und im Modul. Seile der Type F haben etwa die 2,5fache Festigkeit eines Seiles der Type A der gleichen Dimension und etwa den 6fachen Modul. Seile der Type F werden daher verwendet, wenn geringer Durchmesser für eine vorgegebene Festigkeit am wichtigsten ist, und Seile der Type A, wenn die Energieabsorbtion - wegen ihrer größeren Bruchdehnung - wesentlich ist. Sowohl Type A als auch Type F werden für Antennen- und Mast-Abspannungen und für Unterwasseranwendungen eingesetzt.

Es ist auch möglich das Umhüllungsmaterial der Parafilseile zu verändern. Das geschieht, wenn besondere Ansprüche auftreten, z.B. erhöhte Biegsamkeit oder Scheuerfestigkeit. Ein Wechsel des Mantelmaterials beeinflusst keineswegs die Reißfestigkeit oder den Modul der Seile.

Die verschiedenen Typen von Parafil werden in nachfolgender Tafel erläutert:

Basic properties of Parafil ropes:

General:

PARAFIL ropes consist of a closely packed core of high strength endless fibre embedded within a tough and durable sheath. They are light in weight, thin and have high strength. Their exceptionally high corrosion resistance means that practically no maintenance is required and they are highly stretch and shrink resistant.

The strengh and the modulus characteristics of PARAFIL can not only be varied by changing the number of fibres in the core of the rope, but also by changing the fibre material of the core itsself. Terylene, having high strength is used for type A ropes and Kevlar 29 for type F.

The main difference between series A and F is strength and the modulus. Type F ropes are about 2.5x stronger than type A ropes with the same dimension and with about 6x more modulus. Type F ropes are therefore used when a lesser diameter to achieve a certain strength is the most important factor. Type A ropes are used when their ability to absorb energy - due to their higher breaking stretch - is essential. Type A ropes as well as type F ropes are used for ariel and mast tensioning and for use under water.

It is also possible to vary the material of the PARAFIL rope sheath. This applies where special properties are desirable such as a higher flexibility or a greater resistance to wear. The use of a different sheath material does not in any way impact on the strength or the modulus of the rope. Table 1 shows the various types of PARAFIL ropes:

Tensile Strength

Figure1 shows the load / stretch properties for PARAFIL type A and type F. As the breaking load of the various sizes of PARAFIL ropes is achieved by combining standard units of core fibres, these curves apply to the entire range of breaking loads and refer to breaking loads achieved in the thorn-end connections.

Fig.1 Load / stretch properties

% of standard breaking load

% stretch

Elongation

Figure 1 shows that a PARAFIL type A rope with a declared breaking load of 10 tons will stretch by 5.2% when a 10 ton load is applied, whilst 1 ton type A rope shows the same amount of stretch when a 1 ton load is applied.

PARAFIL ropes are supplied on rolls which can cause a certain de-orientation of the parallel fibrebundles of the core. This is rectified during mounting on the construction site or subsequent to a pre-tensioning before use. These factors are referred to in detail in the publication "Errichtungs-Verfahren für PARAFIL Seile". The properties in figure 1 were achieved after a pre-tensioning with 60% of the breaking load, followed by a de-tensioning period of 1hour prior to the measurements being taken.

PARAFIL ropes consist of a closely packed core of high strength and modulus characteristics coupled with an excellent tension-tension fatigues, performance and loss creep.

There are three standard types of Parafil based on the kind of fibre used. Each has a choice of three different polymeric sheaths. A flame retardant variety is also available. The product range is shown in table 1:

Table 1 - PARAFIL types

The specially formulated polyethylene sheath is most commonly used and is perfectly satisfactory for most purposes, but the polyethylene - EVA Copolymer sheath is more flexible. Higher resistance to heat and abrasion can be obtained from polyester elastomer.

The standard ranges of Parafil ropes are shown in table 2 and 3, other sizes are available as requested:

Table 2 - Basic Characteristics of types A and A (C) PARAFIL ropes

Table 3 - Basic Characteristics of type F an F(C), G and G (C), PARAFIL ropes