Polyetherimide (PEI)
Polyetherimide – it is engineering plastic featuring mechanical strength, stability of dimensions and well interbalanced chemical and thermal characteristics (may be used up to +170oC). Chemical name – PEI.
This plastic is resistant to deformations (especially to the action of rotational force), thus it is sufficiently cost-beneficial to use this plastic instead of small mechanically produced steel parts. Polyethermide may be produced with glass fibre additive (up to 30 %), as it provides this plastic with higher hardness, rigidity, mechanical and thermal strength, and stability of dimensions.
Characteristics:
- Fire resistant (non-flammable);
- Flueless;
- Features mechanical strength, rigidity, and hardness, even at various temperatures;
- Easy mechanical workability;
- May be formed by heat treatment;
- Sufficiently good adhesive characteristics;
- May be welded;
- Low thermal expansion coefficient;
- Ensured stability of dimensions, even at high temperatures;
- Good electro-insulation and dielectric characteristics;
- Resistant to gamma radiation;
- Resistant to multiple sterilization;
- Particularly high resistance to water and steam, mineral oils, petrol, and alcohol;
- Chemically non-resistant to aromatic solvents, ketones, certain hydrocarbons, other solvents, e. g., methylene chloride;
- Colour: PEI - yellowish (amber), PEI with glass fibre additive - grey (black).
Technical data:
- Density - 1.27 g/cm3;
- Operating temperature: from -50 oC to +170 oC;
- Short-term operating temperature +210 oC (PPS);
- Reaction to fire class: V0 (UL 94).
Dimensions*:
|
|
Thickness (mm) |
Width (mm) |
Length (mm) |
Diameter, Ø (mm) |
|
Sheets |
10-60 |
620 |
3000 |
- |
|
Bars |
- |
- |
1,220; 2,440 |
20-100 |
*PEI plastic is not warehoused, it is delivered only on special orders.
Scope of application:
PEI plastic is used, if fire-resistance and mechanical rigidity is required.
Industry of electrics and electronics: for high voltage housings, insulators, microwave oven parts, plug-in adapters, terminal, and fuses.
Medicinal industry: for adapters, instrument handles, probes.
Aviation: for finishing of passenger saloons, panels.
Production of wheeled motor vehicles: components of motor vehicle bonnets, jet engines.
