G11 Plastic Machining

G11 epoxy resin is an ideal material for parts and components that require extremely high strength, high dimensional stability, and high creep resistance across a wide temperature range. Sometimes referred to as G11-FR5 or G11 laminate, this glass epoxy material is commonly used for terminal boards, electric rotor insulation, electronic test equipment, and high humidity applications. Although the material can be difficult to machine with accuracy, Upland Fab has the experience and expertise to fabricate high precision laminate parts from G11 plastic.

G11 Epoxy Resin

Like other phenolic laminates, G11 epoxy resin is produced by applying high heat and pressure to multiple stacked layers of specialty materials, which have been impregnated with synthetic thermoset resins. The heat and pressure polymerizes those disparate layers into a single, laminated material.

G11-FR5 is extremely strong and stiff, with excellent electrical properties and a very low coefficient of thermal expansion. It exhibits very low moisture absorption and is flame retardant. These and other factors make G11 plastic ideal for electronic and electromechanical components and high-humidity environments.

Properties of G11 Epoxy Resin

ASTM or UL test	Property	G-3	G-5/G-9	G-7	G-10	G-11
	*PHYSICAL*
D792	Density (lb/in³) (g/cm³)	0.065 1.80	0.067 1.85	0.065 1.80	0.065 1.80	0.065 1.80
D570	Water Absorption, 24 hrs (%)	2.65	0.60	0.10	0.10	0.20
	*MECHANICAL*
D638	Tensile Strength (psi) -lengthwise	42,000 34,000	61,600 51,100	20,000 -	45,000 38,000	43,000 37,000
D790	Flexural Strength (psi) -lengthwise -crosswise	40,500 34,000	61,600 51,100	30,000 -	75,000 65,000	80,000 70,000
D790	Flexural Modulus (Kpsi) -lengthwise -crosswise	1,800 1,400	2,000 1,700	1,600 -	2,700 2,400	3,000 2,700
D256	IZOD Notched Impact (ft-lb/in) -lengthwise -crosswise	12.0 11.0	12.5 8.5	13.0 -	14.0 12.0	12.0 9.0
D695	Compressive Strength (psi)	55,000	65,000	50,000	65,000	63,000
D785	Hardness, Rockwell M	M110	M115	M105	M110	M112
	*THERMAL*
D696	Coefficient of Linear Thermal Expansion (x 10^-5 in./in./°F) -lengthwise -crosswise	0.83 1.00	0.83 1.00	0.72 0.90	0.55 0.66	0.72 0.83
-	Max Operating Temp (°F / °C)	340 / 170	285 / 140	430 / 220	284 / 140	329 / 165
C177	Thermal Conductivity (BTU-in/ft²-hr-°F) (x 10^-4 cal/cm-sec-°C)	2.0 7.0	2.0 7.0	2.0 7.0	2.0 7.0	2.0 7.0
UL94	Flammability Rating	H-B	V-0	H-B	H-B	H-B
	*ELECTRICAL*
D149	Dielectric Strength (V/mil) short time, 1/8" thick	460	300	350	800	900
D150	Dielectric Constant at 1 MHz	7.3	6.3	4.5	5.0	4.5
D150	Dissipation Factor at 1 MHz	0.023	0.019	0.018	0.019	0.020
D495	Arc Resistance (sec)	180	180	240	100	120

[G11 material chart]

Precision Machined G11-FR5 Parts

Because of its unique makeup, accurately machining G11-FR5 presents a challenge. Upland Fab utilizes multi-axis CNC machining and special tools to produce high precision, tight tolerance G11 plastic parts. CNC technology ensures perfect repeatability from the first piece to the last, and enables us to fabricate parts with minimal time devoted to handling and fixturing. In many cases, even parts with very intricate geometries can be completed in a single operation for fast and efficient service.

Through DPD/MBD processes (Digital Product Definition/Model-Based Definition), we can work directly from your CAD models or other digital design files. This improves accuracy and helps us eliminate manufacturing errors, resulting in higher quality parts at lower costs.

G11 Material Machining to Match Your Industry Requirements

G11 epoxy resin offers high strength and great dimensional stability to component production across industries:

Medical: Due to its chemical resistance and low moisture absorption, G11 is an excellent choice for manufacturing medical devices, diagnostic equipment, and more.
Defense: G11 meets and exceeds stringent Mil-Spec standards, depending on your planned application. It is used for manufacturing rocket cases, components used in aerospace or marine conditions, and more.
Semiconductor & Electronics: G11 materials offer excellent dielectric strength, making it a good choice for electronic or semiconductor assemblies. It is often used to manufacture circuit board holders, terminal boards, and other electrical equipment.
Aerospace: The aerospace industry has no room for error as failure of the smallest part can have catastrophic consequences. G11 provides high impact strength and good dimensional stability, making it a popular choice for aircraft, antenna insulators, and many other aerospace components.

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Other Materials We Work With

Are you looking for another material? We have the ability to machine many different materials take a look below at some of the other plastics we work with.

Contact Upland Fab to Learn More About G11 Composite Plastic Machining

We have been providing top-flight plastics and composite machining in Southern California since 1970. Contact Upland Fab to learn more or get a quote on your G11 laminate machining project.

Take a look at some examples of what our engineers can do!

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PROVIDING SOLUTIONS TO YOUR PLASTIC MACHINING REQUIREMENTS FOR OVER 50 YEARS