Thermal Grade Glass Polyester

GlasGuard 1130 is a low toxicity polyester sheet.

Application – Developed for the NYC transit authority for third-rail covers, sign material and switchgear components. 

Characteristics – Flame and corrosion resistant, dielectric properties, meets NEMA criteria for grade GPO-3.

Sheet Size – 3′ x 6′; 4′ x 8′ 

Water Absorption – .1% by weight

Operating Temperature –  130°C

Flexural Strength – @130°F = 11.3 psi

Arc Resistance – 192 seconds

Manufacturer – Rochling

Glastherm HT200 is a thermal insulating sheet with superior strength and heat resistance with continuous use temperatures to 550°F.

Application – Mold bases or platen press insulation

Characteristics – Resists the effects of molding pressure. Resistant to oil and water absorption. Asbestos free.

Sheet Size – 36” x 48” and 48” x 96” sheets 1/4” to 1” thick.

Thickness tolerance – ± .002 in.

Density – 1.23

Operating temperature – 550°F

Compressive Strength – 49,000psi @ 75°F; 18,000psi @ 392°F; 17,500 @ 425°F

Thermal conductivity – 1.90

Manufacturer – Rochling

Glastherm HT220 is a thermal insulating sheet with use to 550°F.

Application – Molds

Characteristics – Heat resistant, compressive strength, low thermal conductivity

Sheet Size – 4′ x 8′

Thickness tolerance – +/-.004

Operating temperature – 600°F

Compressive Strength – 72,500 psi @ 68°F

Thermal conductivity – 1.75

Manufacturer – Rochling

Glastherm HT250 is a thermal insulating composite sheet with use up to 550°F.

Application – Molds

Characteristics – Compressive strength, low conductivity, thermal insulation

Sheet Size – 4′ x 8′

Thickness tolerance – +/- .004

Operating temperature – Continuous > 482°F Maximum 752°F

Compressive Strength – 87,000 psi @ 68°F

Thermal conductivity – 1.45

Manufacturer – Rochling

Glastherm S is a general purpose thermal insulating sheet with use to 550°F.

Application – Platens and molds

Characteristics – Compressive strength and low conductivity 

Sheet Size – 3′ x 6′; 4′ x 8′

Thickness tolerance – +/- .002

Density – 145

Operating temperature – 425°F

Compressive Strength – 45,000 psi @ 75°F

Thermal conductivity – 1.8

Manufacturer – Rochling

Durostone Glastic FHT (Flexible High Temperature) Laminate provides numerous high performance features and benefits, such as high flexibility and excellent dielectric strength at elevated temperatures.

• Highly Flexible
• Excellent Dielectric Strength
• High Heat Resistance
• Ideal For Dry-Type Transformers
• Easily Fabricated
• Asbestos-Free

It also exhibits the highest UL temperature index in the industry for a flexible glass-reinforced polyester in 1⁄32 inch and 1⁄16 inch thicknesses:

• 1⁄32″ – 190° C Electrical • 1⁄16″ – 200° C Electrical
• 1⁄32″ – 190° C Mechanical • 1⁄16″ – 200° C Mechanical

With its high resistance to heat, FHT Laminate offers a cost-effective alternative to aramid paper in
220°C insulation for dry-type transformers.

Manufacturer – Rochling

Durostone Glastic SG-200 High-Strength & High-Temperature Laminate offers the same high-performance features and benefits as FHT Laminate. In addition, SG-200 offers much higher mechanical strengths than FHT with temperature ratings of up to 210° C.

Because of its capabilities, SG-200 is ideal for a wide variety of product applications requiring hightemperature NEMA GPO-1 products. Grade SG-200 is also a superior replacement material for epoxy-bonded mica in layer insulation applications. SG-200 has a UL Temperature Index of 210° C Electrical and 210° C Mechanical.
Grade SG-200 is available in thicknesses of 1⁄32″ to 2 1⁄2″. Special sheet sizes of 64″ x 64″ are
available for large lifting magnets.

• Extremely Strong
• Excellent Retention of Properties at Elevated Temperatures
• Ideal For High Temperature Application
• Easily Fabricated
• Asbestos-Free

Application – Layer and core insulation for transformers

Characteristics – High flexibility, dielectric strength at elevated temperatures

Sheet Size – 3′ x 6′; 4′ x 8′; 1/32

Operating temperature – 410°F

Compressive Strength – 36,000 psi 

Thermal conductivity – 1.7

Arc Resistance – 139 seconds

Manufacturer – Rochling

HST-II is a high temperature polyester laminate that exhibits excellent retention of electrical and mechanical
properties at elevated temperatures.

Applications – High voltage transformers, DC motors and
elsewhere when materials with high thermal indices are required.

Characteristics – High temperature resistance with excellent retention of electrical and mechanical properties

Sheet Size – 3′ x 6′; 4′ x 6′; .032-2″ thickness

Operating temperature – 220°F

Compressive Strength – 33,000 psi 

Arc Resistance – 150 seconds

Manufacturer – Haysite Reinforced Plastics

GPO-3 is a flame-retardant glass-reinforced polyester laminate designed for electrical insulation and structural applications requiring high mechanical strength, arc resistance, and dimensional stability.