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紙的紙頁較粗糙,平滑度低;小于 10dg者,紙頁細膩,平滑度好,但是裂斷長、耐破度、撕裂度及耐折度下降。 Chapter 1 The Composition and Structure of Wood 16 Tianjin University of Science amp。 Technology 4. 纖維的卷曲因子( Form factor 或 Curl Index) D L Form factor = D/L Curl Index = L/D 1 Chapter 1 The Composition and Structure of Wood 17 Tianjin University of Science amp。 Technology 6. 扭結指數(shù)( Kink index ) ?Measurement of angles ?Reported according to Kibblewhite’s kink index formula Chapter 1 The Composition and Structure of Wood 18 Tianjin University of Science amp。 Technology Principle of mechanical refining. Wood chips are fed into the refining zone where they are disintegrated between two grooved discs of which at least one is revolving. 纖維的扭結是指由于纖維細胞壁受損而產(chǎn)生的突然而生硬的轉折。 Chapter 1 The Composition and Structure of Wood 19 Tianjin University of Science amp。 Technology 扭結指數(shù)可用單位長度上扭結平均個數(shù)(個 /mm)或單根纖維上扭結平均個數(shù)(個 /單根纖維)表示。 Chapter 1 The Composition and Structure of Wood 20 Tianjin University of Science amp。 Technology ? 定義: 1)造紙原料中長度等于或小于 2)造紙原料中通過纖維篩分儀的 200目篩( )的纖維 ? 來源: 1) 初級細小纖維: 木材中原有的小顆粒,如切斷的纖維、導管分子、紋孔、射線細胞和薄壁組織細胞(量少); 2) 二次細小纖維: 漿料在生產(chǎn)和后續(xù)的抄造過程中通過機械處理產(chǎn)生的纖維壁碎片(量多)。 ( fines) Chapter 1 The Composition and Structure of Wood 21 Tianjin University of Science amp。 Technology ? 影響 1)紙機的運行過程,比如留著、濾水、白水回收系統(tǒng)、助劑效用、干燥速度等; 2)紙張的性能,比如紙張結構、物理強度性能、光學性能、印刷性能等。 Chapter 1 The Composition and Structure of Wood 22 Tianjin University of Science amp。 Technology (三 )纖維形態(tài)測定 1. 纖維的長 、 寬度測定 ? 臺式投影儀進行; ? Kajaani FS ( 100/200/300) 型纖維質(zhì)量自動測量儀; ? 纖維質(zhì)量分析儀 ( FQA) ? Fibermaster/Fibertester Chapter 1 The Composition and Structure of Wood 23 Tianjin University of Science amp。 Technology