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2026 Vol.58, Issue 3 Preview Page

Original Paper

Effects of Biofiber Mixing Ratio and Processing Conditions on the Physical Properties of Paper Mulberry-Based Machine-Made Hanji

닥나무 인피섬유와 생분해성 바이오 섬유의 배합비 및 공정 조건이 기계한지의 물리적 특성에 미치는 영향

Sung Hoon Kang1
,
Yong Chan Ju1
,
Young Jae Choi2
,
Hyun A Lim1†
강 성훈1
,
주 용찬1
,
최 영재2
,
임 현아1†
1Hanji Promotion Agency, Jeonju Cultural Foundation
2Cheonyang P&B Co., Ltd.
1(재)전주문화재단 한지진흥원, 연구원
2천양피앤비㈜, 대표
†Corresponding Author: E-mail: lha2625@hisc.re.kr (Address: Hanji Promotion Agency, Jeonju Cultural Foundation, Jeonju, 55000, Republic of Korea)
30 June 2026. pp. 82-95
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Abstract

This study investigated the effects of the degree of beating, biofiber mixing ratio, and addition of a dispersant on the physical properties of machine-made Hanji prepared by blending long paper mulberry fibers with biodegradable biofibers such as PLA, Alginate, Rayon, and Tencel. The optimal beating degree (22.5 °SR) maintained an open fiber network with a bulk of 3.10 cm3/g, a tensile strength of 3.10 kN/m, and an air permeability of 85 µm/Pas. Tencel (1.7 denier) exhibited the highest tensile strength due to its fine denier and hydrophilic surface, which promote hydrogen bonding with paper mulberry fibers. As the biofiber content increased, thickness and bulk increased, while density and tensile strength decreased. The optimal laboratory-scale ratio was determined to be 8:2 (paper mulberry:Tencel, w/w) at 50 g/m2. For field-scale machine papermaking, the ratio was adjusted to 6:4 (w/w) at 90 g/m2 to resolve flocculation issues and ensure stable production. Biodegradability testing (KS M ISO 14855-1:2012, 45 days) showed 104.5% for Sinbiji (6:4, w/w) and 85.4% for Tencel Crepe Hanji (5:5, w/w). Chemical safety tests confirmed non-detectable levels of aromatic amines and formaldehyde, and the combustion toxicity index (R = 0.03) was well below the safety threshold, supporting the application of these materials in hygiene products, construction materials, and industrial filters.

Keywords
Paper mulberry fiber
biodegradable fiber
tencel
machine-made Hanji
tensile strength
biodegradability
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Information
  • Publisher :Korea Technical Association of The Pulp and Paper Industry
  • Publisher(Ko) :한국펄프종이공학회
  • Journal Title :Journal of Korea TAPPI
  • Journal Title(Ko) :펄프종이기술
  • Volume : 58
  • No :3
  • Pages :82-95
  • Received Date : 2026-05-20
  • Revised Date : 2026-06-15
  • Accepted Date : 2026-06-16
  • DOI :https://doi.org/10.7584/JKTAPPI.2026.6.58.3.82
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