Crown Plastics

Lam­i­nates (phe­no­lics, epoxy glass laminates)

Prop­er­ties

• Ther­moset resin-impregnated rein­forc­ing mate­ri­als cured under heat and pressure
• The resins are gen­er­ally phe­no­lic, sil­i­cone, melamine or epox­ies; the sub­strate mate­ri­als range from paper and cot­ton to glass.
• Uni­formly dense and struc­turally strong
• Will not soften appre­cia­bly under the reap­pli­ca­tion of heat
• Extremely durable
• Light­weight
• Moisture-resistant
• High mechan­i­cal and insu­lat­ing properties

Com­mon uses

• Relays
• Switches
• Stand­offs
• Bus bars
• Wash­ers
• Arc shields
• Test boards, trans­form­ers and cir­cuit boards
• Pan­els
• Con­densers

Unlike other groups of plas­tic mate­ri­als, ther­moset plas­tic indus­trial lam­i­nates have their own stan­dards, which are pub­lished by the National Elec­tri­cal Man­u­fac­tur­ers Asso­ci­a­tion (NEMA), www.nema.org. The most com­mon NEMA ther­moset grades are:

• C, CE (canvas-, cotton-, cloth-reinforced phe­no­lic) medium-weave cloth
• G-10/ FR-4 (glass– cloth-reinforced epoxy)
• G-11/FR-5 (like G-10 but higher temp)
• G-5/G-9 (glass-, cloth-reinforced melamine)
• G-7 (glass-, cloth-reinforced silicone)
• GPO-1, GPO-2, GPO-3 (glass-mat rein­forced polyester)
• L, LE (linen-, cotton-, cloth-reinforced phe­no­lic) fine-weave cloth
• X, XX, XXX (paper-reinforced phenolic)

Don’t see what you’re look­ing for? Call us at 800–423-2769 or email us at tom@crownplasticsinc.com.