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PUR safely replace with cost-effective PVC
PUR (polyurethane) has decisive advantages as a jacket material in some areas, but not in all. Our aim is to put you in a position to decide objectively whether a cable with PVC jacket is not only sufficient, but may be the better solution.

Why can you save money by choosing the right outer casing?

Every material has specific specifications; there is no one-size-fits-all good or bad material. Here we use the example of the sheath materials PVC and PUR to show which is best suited for which applications and provide specific ideas for reducing costs in this context.

Advantages and specifications of the two materials

PVC

Good abrasion resistance
Excellent flame resistance
Very easy to customise

PVC or polyvinyl chloride is a versatile plastic compound. Nevertheless, there is a widespread perception that PVCcables are only suitable for fixed installation.
However, this is not entirely true. There are thousands of different PVCcompounds for a variety of applications and it is important to find the right one for use in the energy chain. For the igus® chainflex® cable, we have chosen a compound that has a high abrasion resistance in the e-chain®, is very easy to assemble and is also cost-effective. This is why PVCcables are often used in industries with a dry environment at room temperature conditions, such as the packaging or wood industries.

PUR

Good oil resistance
Durability at low temperatures

A PUR (polyurethane) outer jacket is characterised above all by its very good oil resistance. PUR-cables are often used in applications and industries with dirty ambient conditions such as oil or coolants, for example in machine tool construction. Nevertheless, the sheathing remains flexible even in continuous use in the energy chain and can withstand a high mechanical load trade show. In addition, PURcables are well suited for applications with low temperatures.

Sample calculation of catalogue cables

CF270.UL.D in PUR

Part no.: CF270.UL.25.15.02.01.D
Number of cores and conductor nominal cross section:
(4G2.5+(2x1.5)C)C
Max. outer diameter: 14 mm
bend radius: 10 x d

A comparison is worthwhile! Cost savings of up to:

CF210.UL in PVC

Part no.: CF210.UL.25.15.02.01.D
Number of cores and conductor nominal cross section:
(4G2.5+(2x1.5)C)C
Outside diameter max.: 14 mm
bend radius: 10 x d

CF77.UL.D in PUR

Part no.: CF77.UL.15.12.D
Number of cores and conductor nominal cross section:12G1.5
Outer diameter max.: 15 mm
bend radius: 6.8 x d

Cost savings of up to:

CF5 in PVC

Part no.: CF5.15.12
Number of cores and conductor nominal cross section:12G1.5
Outer diameter max.: 15 mm
bend radius: 6.8 x d

CF211.PUR in PUR

Part no.: CF211.PUR.02.04.02
Number of cores and conductor nominal cross section: (4x(2x0.25))C
Outer diameter max.: 7.5 mm
bend radius: 7.5 x d

Cost savings of up to:

CF211 in PVC

Part no.: CF211.02.04.02
Number of cores and conductor nominal cross section: (4x(2x0.25))C
Outer diameter max.: 8 mm
bend radius: 7.5 x d

chainflex® application examples from practice
Today, servo cables are the standard for drive technology in automation technology and mechanical engineering. The movements to which the cables are exposed in these industries are associated with high mechanical stress. In addition, the cables are often used in an environment contaminated by moisture, oils, dust or chips. Choosing the right sheath material is therefore crucial. In order to ensure the consistent quality of the sheath material, our cables are repeatedly tested under real conditions so that we can provide a binding guarantee and calculate the cable online. The cables are tested in both short-term batch tests and long-term service life tests.

Example of long-term test 3841a of a servo cable of the CF21 series (PVC-cable), with a test bending factor of only 6.1 x d and 54 million strokes achieved.

Test 3841a servo cable CF21. UL

However, it is not only our servo cables that offer this choice between different sheath qualities, but also all our other cable types, such as measuring system cable, bus cable, control cable, etc., and these have also been tested in our own test laboratories.

Consulting

I look forward to answering your questions

Katharina Wielpütz+49 2203 9649 7082 Write e-mail

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