Clear Machined Plastic Choices

Many applications benefit from utilizing clear machined plastic components To help determine the procedure or enhance aesthetics. From the amorphous plastics household, the design engineer may choose from 6 commonly available materials: acrylic, polycarbonate, Polysulfone, Ultem, PVC and COC/COP. While appearing in varying amounts, the substances are all sensitive to stress cracking. Anxiety risers with large mechanical forces ought to be avoided. Specifically, inadequate machining may cause stress fractures after a few months. All machined plastic components need place polishing to return them into the initial clarity. Without shining, the machined plastic component is much more translucent than completely obvious.
Among the least expensive stuff for machined plastic parts, Acrylic can also be the very clear. Transmitting almost 92 percent of mild, acrylic has no shade and appears like window glass. Quite hard and scratch resistant, and it may suffer from brittle failure. Acrylic has restricted chemical resistance. It tolerates Isopropyl alcohol fairly well but will probably be degraded by more powerful solvents.
Coefficient of Thermal Stability — .00004 in/in/F
High dielectric constant
Haze — 1 percent
UV secure
Continues service temp 175F, burst into 200F
Tensile power 10,500 psi
Modulus of elasticity — 450,000 psi (tensile)
Flammability — 94HB
Available in several Unique colors

Prodigy Design Plastics
Also referred to as Lexan, polycarbonate is extremely impacted resistant to machined plastic components. This isn’t to be mistaken with stress cracking resistance, such as other amorphous plastics it doesn’t tolerate steady state pressure well. Offered in system grade (gray or purple tint) or window tier (tint less). Polycarbonate has greater chemical resistance than oil but reduced scratch resistance. Being marginally milder provides durability and doesn’t suffer from brittle failure. It’s simple to polish after machining and produces an appealing part. Biocompatibility (USP class VI) lets Polycarbonate machined plastics components to locate applications in medical device software. Continue Reading
Tensile strength at yield — 8900 psi
Tensile Modulus — 340,000 psi
Flexural Strength — 13,500
Flexural Modulus — 340,000
Heat deflection temperature — 270F in 264 psi
Flammability — V0 & 94HB
1/2 the burden of Glass
Constant Service temperature to 250F
Frequently utilized in hot liquid software, Polysulfone machined plastic parts have greater continuous service temperature compared to both Polycarbonate and oil. Polysulfone machined plastic components can be extremely clear though more costly with the greater functionality. Sensitive to pressure cracking, helicoids thread inserts are ardent. Autoclave-friendly, it’s offered in some colors in USP class 6 to medical programs. Easily polished in a machined plastic component form.
Normal properties are:
Low creep under constant load at elevated temperatures
Dielectric power — 425 v/mil
Can repeatedly be steam and dry heat sterilized
Excellent dimensional stability

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