Rubber Properties

DockGuard Rubber - Features

Different manufacturing requirements demand different characteristics from rubber and rubber compounds and our experience enables us to ensure the right materials are selected to ensure perfect product quality and durability for every application – balancing materials quality with cost-effectiveness to exactly meet the customers cost and quality requirements.

We use natural rubber and styrene based rubber compounds which meet or exceed the performance requirements of international fender recommendations, such as PIANC and EAU. We also utilise other compounds incorporating Butyl Rubber, EPDM, Polyurethane and Neoprene.

We are always happy to provide detailed technical information on the compounds and rubber qualities of any of our products as well as laboratory results from our quality assurance testing programmes and to provide cured samples for independent testing.

Rubber Properties - Moulded Specification

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Property	Testing Standard	Condition	Requirement
Tensile Strength	DIN 53504; ASTM D 412 Die C;	Original	17.8 MPa (min)
	AS 1180.2; BS ISO 37;
	JIS K 6251 GB/T528
Aged for 96 hours at 70°C	15.7 MPa (min)
Elongation	DIN 53504; ASTM D 412 Die C;	Original	445%
at break	AS 1180.2; BS ISO 37;
	JIS K 6251GB/T528,I
Aged for 96 hours at 70°C	378%
Hardness	DIN 53505; ASTM D 2240; AS1683.15.2; JIS K 6253 GB/T531	Original	72°Shore A (max)
Aged for 96 hours at 70°C	Original +5° Shore A (max)
Compression	ASTM D 395 Method B; AS 1683.13 Method B; BS903 A6 ISO 815;	22 hours at 70°C	25.3% (max)
Set	JIS K 6262
DIN53517 GB/7759,I	24 hours at 70°C
Tear Resistance	ASTM D 624 Die B; AS1683.12;	Original	70kN/m (min)
	BS ISO 34-1; JIS K 6252
DIN53507 GB/T7529	84N/cm (min)
Ozone Resistance	DIN 53509; ASTM D 1149;	50pphm at 20% strain, 40°C, 48 hours	No Cracks
	AS 1683-24; ISO 34.1;
	JIS K 6259 GB/T13642
Seawater Resistance	DIN 86076	28 days at 95°C ± 2°c	Shore A: ±7° (max) / Volume +8% (max)
Abrasion Resistance	DIN53516 GB9867;BS903.A9i	Original	95mm³ (max)
Bond Strength	ASTM D429, Method B; BS 903.A21 Section 21.1	Rubber to Steel	7.5N/mm (min)

Rubber Properties - Extruded Specification

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Property	Testing Standard	Condition	Requirement
Tensile	DIN 53504; ASTM D 412 Die C;	Original	13.0 MPa (min)
Strength	AS 1180.2; BS ISO 37; JIS K 6251

		Aged for	10.4 MPa (min)
		96 hours
		at 70°C
Elongation	DIN 53504; ASTM D 412 Die C;	Original	280%
at break	AS 1180.2; BS ISO 37; JIS K 6251

		Aged for	224%
		96 hours
		at 70°C
Hardness	DIN 53505; ASTM D 2240;	Original	78°Shore A (max)
	AS1683.15.2; JIS K 6253

		Aged for	Original +8°
		96 hours	Shore A (max)
		at 70°C
Compression	ASTM D 395 Method B;	22 hours	30% (max)
Set	AS 1683.13 Method B;	at 70°C
	BS903 A6 ISO 815; JIS K 6262
	DIN53517	24 hours	30% (max)
		at 70°C
Tear	ASTM D 624 Die B; AS1683.12;	Original	60kN/m (min)
Resistance	BS ISO 34-1; JIS K 6252
	DIN53507	Original	50N/cm (min)
Ozone	DIN 53509; ASTM D 1149;	50pphm at	No Cracks
Resistance	AS 1683-24; BS ISO 1431-1;	20% strain,
	JIS K 6259	40°C, 100 hours
Seawater	DIN 86076	28 days	Shore A:
Resistance		at 95° C ± 2°c	±10° (max)/Volume
			+10/-5% (max)
Abrasion	DIN53516	Original	180mm³ (max)