• Title/Summary/Keyword: electron beam finishing

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Performance Experiment of Electron Beam Convergence Instrument (Finishing 용 전자빔 집속 장치의 성능 실험)

  • Lim, Sun Jong
    • Laser Solutions
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    • v.18 no.3
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    • pp.6-8
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    • 2015

  • Finishing process includes deburring, polishing and edge radiusing. It improves the surface profile of specimen and eliminates the alien substance on surface. Deburring is the elimination process for debris of edges. Polishing lubricates surfaces by rubbing or chemical treatment. There are two types for electron finishing. The one is using pulse beam. The other is using the convergent and scanning electron beam. Pulse type device appropriates the large area process. But it does not control the beam dosage. Scanning type device has advantages for dosage control and edge deburring. We design the convergence and scan type. It has magnetic lenses for convergence and scan device for scanning beam. Magnetic lenses consist of convergent and objective lens. The lenses are designed by the specification(beam size and working distance). In this paper, we evaluate the convergence performance by pattern process. Also, we analysis the results and important factors for process. The important factors for process are beam size, pressure, stage speed and vacuum. These results will be utilized into systematizing pattern shape and the factors.

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Electron Beam -Induced Graft Polymerization of Acrylic Aicd on Polypropylene Nonwoven Fabrics(I) (전자빔 가속기를 이용한 폴리프로필렌 섬유의 개질(I) - 전자빔 조사에 따른 폴리프로필렌 섬유의 물리적, 열적 특성변화 -)

  • ;N.I. Shtanko
    • Textile Coloration and Finishing
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    • v.15 no.2
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    • pp.102-108
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    • 2003

  • Before studying graft polymerization of PP(polypropylene) nonwoven fabrics by electron beam preirradiation method, mechanical properties, thermal properties and degree of crystallinity of original and electron beam irradiated PP nonwoven fabrics were investigated. Morphological surface changes of electron beam irradiated PP nonwoven fabrics were not observed. And the melting temperature and crystallinity of electron beam irradiated PP nonwoven fabrics also did not change as compared with untreated PP nonwoven fabrics. But the breaking strength of electron beam irradiated PP nonwoven fabrics decreased with increasing electron beam absorbed dose due to breakdown of some parts of polymer main chain.

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