Phenolic machinable plastics are thermoset composite materials. They have the advantage of high strength and stiffness achieved through a reinforcement material. Glass fiber or woven cotton with resins including phenolic or epoxy are blended to create sheet material. This process makes phenolics generally more cost effective than thermoplastics for the same application. These composites have varying properties depending on the resin-reinforcement materials used. Phenolic plastics carry nearly half the weight of aluminum, with a physical toughness that withstands abrasion, impact, and friction and material fatigue. Phenolic plastics are corrosion resistant to most chemicals and substances.
High tensile, compressive, flexural and impact strength make phenolic plastics the material of choice for many applications. Interstate Plastics offers various specialty grades of phenolic including "C" grade canvas sheet, "LE" grade sheet, paper "economy" grade sheet, and G-10 glass epoxy sheet. The insulating qualities of each grade - such as low dissipation factor and excellent dielectric strength—make phenolic plastics valuable for many precision electrical and electronic applications.
"C" Grade Canvas Phenolic Sheet
Canvas "C" grade consists of a cotton canvas fabric and general-purpose phenolic resin. The product is easy to machine, known for high impact strength, and operates with less noise than metal. In addition, this material is not as abrasive as fiberglass alternatives when used in wear applications. Since it does not spark when struck, canvas phenolic can be used in explosion-proof environments. The material is commonly used to make gears, pulleys, rollers and guides. Canvas phenolic is a mechanical grade and does not have electrical properties comparable to the normative "C" grade. It can withstand temperatures up to 257F.
Linen "LE" Grade Phenolic Sheet
Linen "LE" grade sheet is used where better machining is needed compared to that offered by canvas grades. This product consists of a fine-weave linen fabric and general-purpose phenolic resin. Besides easy machining, linen phenolic operates with less noise than metal. In addition, this physical material is not as abrasive as fiberglass alternatives when used in wear applications. Linen phenolic can be used in explosion-proof environments. It is suitable for smaller and more intricate shapes than those made with canvas phenolic, and is commonly used to make fine-tooth gears, pulleys, rollers, guides and other precision parts. Phenolic grade "LE" sheets will withstand up to 275F and has a moisture absorption rate of 1.3%.
Paper-masked "Economy" Grade Phenolic Sheet
Paper "economy" grade is a paper-based laminate with low phenolic resin content. A non-nema economy grade, economy paper phenolic is typically hot punched for numerous low voltage electrical applications. Economy paper offers fair electric properties in dry conditions, but the product is not suitable for applications that require resistance to high humidity.
G-10 Glass Epoxy Sheet
A light green material, G-10 glass epoxy sheet combines a woven glass fabric and an epoxy resin laminate that contains bromine. G10 provides consistent quality and good electrical properties under dry and humid conditions, as well as high flexural, impact, and bond strength at room temperatures. Due to a high mechanical strength, low water absorption and superior electrical characteristics, this product is suitable for a variety of structural, high humidity, and electrical insulation applications, which include terminal boards, lapping carriers, and disc and microelectronics polishing. It will withstand temperatures up to 284F and has a moisture absorption rate of .15%.
- Strong, stiff, tough and durable
- Excellent dielectric strength
- Good machinability
- Light weight
- Heat and water resistant
- Corrosion and chemical resistant
- Good mechanical strength
- Excellent wear properties
- Good dimensional stability
- Low moisture absorption
- Excellent creep resistance