Journal of Korea Technical Association of The Pulp and Paper Industry (펄프종이기술)

Korea Technical Association of the Pulp and Paper Industry (한국펄프종이공학회)
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Manufacture of Specialty Paper with Hemp Bast Fiber Cultivated in Korea (Part 1) - Characteristics of Hemp-Wood Paper by Soda Pulping -

삼섬유를 이용한 특수기능지 개발 (제 1보) - 소다펄프화 삼 섬유의 수초지 특성 -

  • Lee, Dah-Hee (Dept. of Paper Science & Engineering, College of Forest & Environmental Science, Kangwon National University) ;
  • Lee, Myoung-Ku (Dept. of Paper Science & Engineering, College of Forest & Environmental Science, Kangwon National University)
  • 이다희 (강원대학교 산림환경과학대학 제지공학과) ;
  • 이명구 (강원대학교 산림환경과학대학 제지공학과)
  • Received : 2013.11.23
  • Accepted : 2013.12.13
  • Published : 2013.12.30
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Abstract

To conserve wood resources for papermaking, chemical compositions of the hemp (Cannabis sativa L.) bast fiber cultivated in Korea such as holocellulose, ${\alpha}$-cellulose, lignin, alcohol-benzene extractives, hot and cold water extractives, and ash contents were investigated to manufacture the specialty packaging paper effectively. Significantly very low klason lignin content of 3.3% was accomplished by removing of the outer shell of bark. Laboratory soda pulping method which is very useful for the nonwood fiber was adapted, and it was found that there was no significant difference in both kappa number and H-factor between 25% and 30% NaOH charge. Hemp pulp cooked with the laboratory digester in 25% NaOH at $170^{\circ}C$ were mixed together with the wood pulp(NBKP:LBKP=1:1) in order to find the optimum mixture ratio which exhibited acceptable paper strength properties such as tensile index, burst index, and tear strength. When 10% of hemp soda pulps was mixed with 90% of wood pulps comprised of SwBKP and HwBKP (1:1), all physical strength increased significantly. The physical strength decreased as the amount of hemp pulp increased because the cell wall of bast fiber is very thick which causes low conformability and low fiber-fiber bonding. These results showed that paper made of hemp-wood pulp can be used for the specialty packaging paper which requires both the characteristic surface properties and the high physical strength of hemp fiber.

Keywords

References

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