igus inc. - E-Chain Design Guide

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		Material Specs	Т


igumid G

The materials from which igus^ТЎ Energy Chains are manufactured has a lot to stand up to: Compressive and tensile stresses, abrasion, high and low temperatures. It must also exhibit a high degree of toughness, a high modulus of elasticity and be suitable for use indoors and outdoors. The igus^ТЎ composite material, igumid G, satisfies even those widely contradictory demands. Its enormous range of applications from greenhouses to steelworks are adequate proof of that. For very special applications we also offer modifications and other igus^ТЎ compounds as custom-made solutions. Chemical Resistance igumid G is resistant to fuels and lubricants, oils and greases, alcohols, esters, ketones, aliphatic and aromatic hydrocarbons. It is not absolutely resistant to all oxidants and acids. Table 3 shows an extract from the precise specifications on the chemical resistance of igumid G. Weathering igumid G is suitable for use outdoors. The mechanical properties are not, in our experience, affected by weathering. igumid G is UV-resistant. Flammability The fire retardant properties of igumid G can be described on the basis of various classifications. Test method to VDE 0304 Part 3, May 1970 Classification: II c Test method to UL 94 Standard Tests for Flammability of Plastic Materials for Parts in Devices and Appliances Classification: 94 HB with 3.2 and 1.6 mm thick test bodies. Test method to DIN 4102 Fire Behavior of Building Materials and Building Components Classification: Building material class B 2 Where high flammability ratings are necessary, contact igusТЎ for special solutions. Resistance to Radiation igumid G can be described as highly resistant to high-energy rays. Under gamma radiation in the range of 8 x 104 rd, the mechanical properties change only negligibly. Use in clean-room conditions Independent testing has shown that Igumid G can be used in Class 1 cleanrooms. Vacuum igus^ТЎ Energy Chains made of igumid G can be used in vacuum applications. There is only very little outgassing. Weld spatter, hot chips Laboratory tests and numerous references give proof that igusТЎ Energy Chains and Tubes reliably protect cables in welding robots. Although weld spatter leaves visible traces it does not have any detrimental effect on the material or its proper functioning. igus^ТЎ Energy Tubes have successfully passed testing with medium-sized metal chips of temperatures of 500А C (902АF). Ice For optimum/successful functioning igus Energy Chain should be free of exterior ice prior to machine operation. Failure to de-ice may result in premature breakage of the Energy Chain/Tube System. Abrasives Energy Chains/Tubes operating in long (gliding travels should be free from abrasives for optimum running performance. Extremely abrasive environments can lead to premature wear and reduced overall service longevity. Material Specs

Properties of igumid G	Metric	Т	English	Т
Tensile Strength	N/mm2	190/130*	psi	27,550/18,850*
Tensile Elongation	%	4/6*	%	4/6*
Flexural Modulus	N/mm2	9000/7000*	psi	1,305,000/1,015,000*
Impact Strength 23 C	N/mm2	55/65*	psi	7975/9425*
Impact Strength -40 C	Т	40*	Т	5800*
Temperature Ranges	ТАC	Т	ТАF	Т
a few hours	Т	up to 200	Т	up to 392
5,000 hours	Т	140	Т	284
20,000 hours	Т	130	Т	266
Thermal Conductivity	W / k ТА m	0.23	BTU/hr/ft2/ТАF/in.	1.7
Dielectricity Constant	105hz	3.9/6.2	105hz	3.9/6.2*
Volume Resistivity	ТА cm	1.4	g/cm3	1.4
Density	g/cm3	1.4	g/cm3	1.4
Humidity Absorption	Т	Т	Т	Т
23ТАC/50%	%	1.8	%	1.8
Coefficient of Friction	Т	0.3	Т	0.3
* = dry/conditioned	Т	Т	Т	Т

Table 3: Chemical Resistance - igumid G (Selected Agents)

Medium	Concentration wt %	igumid G
Acetic acid	2	A
Acetone	100	A
Ammonia	10	A
Benzole	100	A
Bitumen	100	B
Boric acid (aqueous)	Sat.aq.sol.	A
Butyric acid	100	B
Calcium chloride (aqueous)	Sat.aq.sol.	A
Caustic potash solution	10	A
Chlorinated hydrocarbons	Т	A
Chlorine water	Sat.aq.sol.	C
Chromic acid (aqueous)	1	B
Diesel oil	100	A
Fluorinated hydrocarbons	Т	A
Formaldehyde (aqueous)	30	B
Formic acid (aqueous)	2	B
Greases, edible fats	Т	A
Hydraulic oils	Т	A
Hydrochloric acid	pH2	B
Hydrochloric acid	2	C
Hydrochloric acid	10	D
Ink, printing ink	Т	A
Iron (II) cyanide	30	B
Mercury	Т	A
Methyl acetate	100	A
Milk	Т	A
Mineral oil	Т	A
Oil, edible oil	Т	A
Oil, lubricating oil	Т	A
Oleic acid	100	A
Paint	Т	A
Paraffin oil	Т	A
Perchlorethylene	100	A
Petrol	100	A
Polyester resins (with styrene)	Т	A
Potassium carbonate (aqueous)	60	A
Potassium sulphate (aqueous)	100	A
Propane gas	Т	A
Sodium carbonate (aqueous)	50	A
Tartaric acid	Т	B
Vaseline	Т	A
Zinc sulphate (aqueous)	10	A
Resistance classes:
A яПН resistant
B яПН resistant with limitations
C яПН partly resistant
D яПН not resistant
E яПН soluble
Sat.aq.sol. яПН saturated aqueous solution
Conc.aq.sol. яПН concentrated aqueous solution
The values quoted above are material-specific values measured in laboratory tests.