Secondary Operations: Adhesive Bonding

증발하는 용제와 달리 접착제 층은 완성된 조립품의 기능적 구성요소로 남게 됩니다. Therefore, the characteristics of the adhesive layer play a key role in the performance and appearance of the finished part.
 
Consider these characteristics when selecting an adhesive:
  • Chemical compatibility with parts being joined
  • 완성된 접합부의 미적 요소
  • Expansion/contraction with temperature changes (NOTE: if expansion/contraction are a major concern, consider mechanical fasteners.)
  • 취성, 강성, 유연성
  • 내구성/서비스 수명
  • 접착 강도(플라스틱과의 접착 부위)
  • 응집 강도(내부 인열 저항)
  • 최종 사용 요건
 
Eastman Tritan copolyester offers outstanding chemical resistance and has been studied with many adhesives and different bonding procedures. 
Adhesive bonding procedures for Eastman Tritan copolyester     
When adhesive bonding parts made with Tritan, joining surfaces should:
  • Fit well without forcing
  • Have no visible gaps
  • Be smooth but not polished:
    • Sand the surfaces you wish to bond with a 120-grit or finer paper.
    • 다이아몬드휠 광택기, 대패 또는 기타 기계적 공구로 좋은 결과를 얻을 수 있습니다.
    • Do not use soft-polishing wheels or flame polishing, as they can round the edges, creating gaps and improper fit.
 
Before selecting an adhesive system, conduct a careful evaluation of the part application to ensure the adhesive provides both acceptable performance (bond appearance and strength) and that it meets all applicable regulatory requirements. See inset box for several recommendations.
 NOTE: This list of recommended adhesive systems does not include all products have been used successfully with Tritan. For best performance, always follow the guidelines provided by the adhesive manufacturer.
    
Recommended adhesive systems for use with Tritan
  • Dymax adhesives for medical devices 
  • Henkel adhesives for medical devices 
  • Weld-On® 55*
  • Lord® adhesives 7542 A/B*
  • Flex Welder 14345*
  • Lord adhesives 403/19*
  • Lord adhesives 406/19*
  • Lord adhesives 406/17*
  • Plastic Welder® II 14340*
*Tested according to ASTM D1002

For details about bonding Tritan to itself and to other materials, contact your Eastman technical representative. For more information about adhesive bonding as well as tips for decorating, painting, overmolding, and other tips, download a free copy of the Secondary operations guide
 
TMI TIP: Adhesives that contain a volatile component may shrink while curing. 수축을 방지하려면 접합 부위를 사선으로 절단하여 약간 접합 부위가 약간 과충전될 수 있는 공간을 확보하시기 바랍니다. 수축에 대한 자세한 정보는 접착제 공급업체의 문헌을 참고해 주시기 바랍니다.