shikoh™

Testing Methods (SHIKOH)

Strength and Elongation of Cured Coating

Composition

  • UV curable component: Photoinitiator (Irgacure 184 or Darocur 1173) = 100:4 *Diluted to NV50% in ethyl acetate when oligomer viscosity is high

Coating

  • Pencil hardness: Coated to a dry thickness of 10μm on 125 μm treated PET film using a bar coater
  • Tensile strength: Coated to a dry thickness of 100μm on PET film using an applicator
  • Adhesion: Diluted in isopropyl alcohol (30% oligomer) and coated to a dry thickness of 5-10μm on various materials using a bar coater
  • Optical properties: Coated to dry thickness of 5-10μm on PET film
  • Surface resistance: Coated to a dry thickness of 5-10μm on treated PET film using a bar coater

Drying

Resins that contain an organic solvent or are diluted in an organic solvent were dried as follows.

  • Diluting solvent (ethyl acetate, methyl ethyl ketone): 60℃ × 3 min
  • Diluting solbent (butyl acetate, toluene, methyl isobutyl ketone, and other high-boiling solbents): 90℃ × 3min

UV irradiation

  • Hard types and medium-hard types: 80W/cm high-pressure mercury lamp × 18cmH × 5m/min × 2 pass (total irradiation: 450mJ/cm2)
  • Soft types: 80W/cm high-pressure mercury lamp × 18cmH × 2.5m/min × 2 pass (total irradiation: 800mJ/cm2)

Measuring methods

  1. 1Pencil hardness: Compliant with JIS K 5600 (load:750g)
  2. 2Adhesion: Compliant with JIS K 5600, evaluated according to a tape peel test (1mm cross cut)
  3. 3Tensile strength: 23℃ × 50%RH, Test sample: 15 mm-wide strip, Distance between chucks: 25mm, Tensile speed: 10mm/min, elongation
    • Young's modulus: calculated at 1%
  4. 4Tg (glass transition temperature): TMA method
  5. 5Molecular weight: GPC method (shodex GPC, three KF-806L columns)
  6. 6 Shrinkage: {(Specific gravity of cured resin - Specific grabity of resin solution before curing) / Specific gravity of cured resin}×100
  7. 7Optical properties: Compliant with JIS K 7105
    • Refractive index: Abbe refractometer
    • Transimittance: Haze meter (transmittance of PET film included)
    • Haze: Haze meter (haze of PET film included)
  8. 8Surface resistance: Compliant with JIS K 6911, measured under a 23℃×50%RH atmosphere using DIA Instruments' Hiresta UP resistivity meter
  9. 9Weather resistance: Accelerated weathering test compliant with JIS 5400 (Sunshine weather meter)

This site has been created based on Nippon Gohsei's technical knowledge, but does not necessarily guarantee performance in all applications. Similarly, figures contained herein are representative values, and not guaranteed values. Please use our products after fully examining their applicability, or contact us should you have any questions.

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NOTE: SHIKOH is a trademark of The Nippon Synthetic Chemical Industry Co., Ltd. (NIPPON GOHSEI)。

Inquiries

Feel free to contact NIPPON GOHSEI for technical inquires and ordering or to request catalogs, pricing estimates, etc.

03-6436-2815

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