Polyetherimide (PEI)

Nombres alternativos y comerciales
Ultem™

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Description

Long-Term Heat Resistance: Excellent stability of physical and mechanical properties at elevated temperatures thanks to high glass transition temperature of 217°C. available with relative thermal indices (RTI) up to 180°C

Strength and Stiffness: Outstanding strength and amorphous thermoplastic among the available alternatives, with predictable stiffness and strength up to 200°C. unfilled, transparent grades are equal in strength to other thermoplastics with opacifying fillers.

Dimensional Stability: Among the most dimensionally stable thermoplastics available, offering predictability over a wide temperature range. filled grades offer exceptionally high-tolerance dimensional capabilities.

Environmental Stress & Cracking Resistance: Unlike most other amorphous thermoplastics, ultem resins retain strength and resist stress cracking when exposed to automotive and aircraft fluids, aliphatic hydrocarbons, alcohols, acids, and weak aqueous solutions.

Flammability, Smoke Generation and Toxicity: Inherent flame resistance without additives in most grades - exceptionally difficult to ignite, with a limiting oxygen index (LOI) of 47%, meeting ul94 v0 specifications in sections as thin as 0.41 mm. generates extremely low smoke per the nbs smoke evolution test, with products of combustion no more toxic than those of wood.

Los datos sobre este material han sido proporcionados por M-Base.

A menos que se indique lo contrario, todas las medidas corresponden a condiciones de temperatura ambiente. A menos que se indique lo contrario, se utilizan las unidades del SI.
Las normas armonizadas son similares a uno o varios estándares del proveedor. Es posible que algunas normas armonizadas se ajusten al estándar original, mientras que otras pueden quedar fuera de su alcance.

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Propiedades

General

Property	Value
Densidad	1.27 - 1.3 g/cm³ Show Material materials with Densidad of 1.27 - 1.3 g/cm³

Mecánica

Property	Value	Comment
Elongación	60.0 - 100.0 % Show Material materials with Elongación of 60.0 - 100.0 %
Módulo elástico	2.9 - 3.3 GPa Show Material materials with Módulo elástico of 2.9 - 3.3 GPa
Resistencia a la tracción	85.0 - 110.0 MPa Show Material materials with Resistencia a la tracción of 85.0 - 110.0 MPa	at 6-10% strain
Resistencia al choque, ensayo Charpy entallado	3.0 - 4.0 kJ/m² Show Material materials with Resistencia al choque, ensayo Charpy entallado of 3.0 - 4.0 kJ/m²
Resistencia al choque, ensayo Charpy no entallado	110 kJ/m² Show Material materials with Resistencia al choque, ensayo Charpy no entallado of 110 kJ/m²

Aplicaciones térmicas

Property	Value
Calor específico	1200 J/(kg·K) Show Material materials with Calor específico of 1200 J/(kg·K)
Coeficiente de dilatación térmica	5.5e-05 - 6e-05 1/K Show Material materials with Coeficiente de dilatación térmica of 5.5e-05 - 6e-05 1/K
Conductividad térmica	0.22 W/(m·K) Show Material materials with Conductividad térmica of 0.22 W/(m·K)
Inflamabilidad	UL 94 V0

Eléctrico

Property	Value
Constante dieléctrica	3.2 [-] Show Material materials with Constante dieléctrica of 3.2 [-]
	3.5 [-] Show Material materials with Constante dieléctrica of 3.5 [-]
Resistividad eléctrica	10000000000000.0 - 1000000000000000.0 Ω·m Show Material materials with Resistividad eléctrica of 10000000000000.0 - 1000000000000000.0 Ω·m

Óptico

Property	Value
Transparencia	yes

Technological properties

Property

Application areas

High voltage breaker housings, multi-way connectors, parts for microwaves, parts for break cylinders, carburetor housings, sterilization containers

Processing methods

Injection molding

Polyetherimide (PEI)

Description

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Usos

Lectura sugerida

Propiedades