Introducing the engineering plastic PBN (Polybutylene naphthalate).

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PBN (Polybutylene naphthalate)

Outline of material

PBN is an engineering plastic from the polyester family. It has excellent wear resistance, sliding characteristics, hydrolysis resistance, and chemical resistance. Compared to PTFE, it has superior mechanical strength, a lower coefficient of linear thermal expansion, and lower specific gravity. Combined with its superior wear resistance compared to PPS, these advantages make it a suitable replacement for PTFE and PPS.

帝人化成株式会社 Teijin Chemicals Ltd.
http://www.teijinkasei.co.jp/english/index.html

Characteristics

Compared to PBT

  • Performs well as a gas/gasoline barrier
  • Excellent chemical resistance
  • Excellent hydrolysis resistance
  • Excellent sliding performance
  • High deflection temperature under load
  • Fast crystallization
  • Low elution of metals and organic substances

Compared to PTFE

  • Low specific gravity (price by volume is similar to PTFE)
  • Excellent mechanical characteristics
  • High deflection temperature under load
  • Low coefficient of linear thermal expansion

Compared to PPS

  • Superior wear resistance
  • Low specific gravity
  • Excellent mechanical characteristics

物性表へ移動します


  • Comparison of wear characteristics

  • Comparison of physical properties with PTFE

Example uses

  • Semiconductor production equipment parts
  • LCD production equipment parts
  • Glass manufacturing jigs
  • Food and beverage industry applications
  • And more...

  • Parts

  • White

Chemical formula

Table of physical properties

The properties indicated below are typical values, and are not guaranteed.
These values are provided for reference purposes only.

Property ASTM test method Unit PBN PTFE PPS
Specific gravity D792 － 1.31 2.18 1.35
Water absorption 23°C/24 hr D570 ％ 0.1 0.01 0.01
Tensile strength (Max.) D638 Mpa 65 31 93

Tensile elongation (Max.)

 D638 ％ 87 400 19
Flexural strength D790 Mpa 81 6 147
Flexural modulus D790 Mpa 1920 343 3430
Melting point   ℃ 243 327 282
Glass transition point   ℃ 78 15－20 －
Deflection temperature under load (1.82 MPa) D648 ℃ 77 51 121
Coefficient of linear thermal expansion D696 10-5/K 7.5－9.4 12.2 5.0
Volume resistivity (1 kV) D257 Ω・m 1014 1016 1014
Breakdown voltage D149 MV/m 42 12 21.3
Chemical resistance：Acid     ○to◎ ◎ ○to◎
Chemical resistance：Alkalinity     ○ ◎ ◎
Chemical resistance：Solvent     ○to◎ ◎ ○to◎

◎ ＝ Excellent, ○ ＝ Good, △ ＝ Satisfactory, × ＝ Unsuited

Download table of physical properties (PDF)

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