Dongguan Quality Supervision Testing Ctr. National Paper Products Quality Supervision Inspection Ctr.

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Dongguan Quality Supervision Testing Ctr. National Paper Products Quality Supervision Inspection Ctr.

China
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Chen C.-X.,Dongguan Quality Supervision Testing Ctr. National Paper Products Quality Supervision Inspection Ctr. | Ou H.-L.,Dongguan Quality Supervision Testing Ctr. National Paper Products Quality Supervision Inspection Ctr. | Deng J.-X.,Dongguan Quality Supervision Testing Ctr. National Paper Products Quality Supervision Inspection Ctr.
Chung-kuo Tsao Chih/China Pulp and Paper | Year: 2012

The differences between unpolarized and polarized light method for determination of cellulose fibre morphology were compared, the principle and characteristics of the methods were discussed. Certain materials, such as cellulose fibres, have a crystalline structure that results in the refractive index varying with the direction of polarization of the light. For polarized light method, a crossed-polarizers set-up is used to discriminate fibres and other materials like air bubbles, which do not rotate the plane of polarization. For unpolarized light method, a suitable unpolarized light source is used to create the high-contrast image between fibres and the background.


Chen C.-X.,Dongguan Quality Supervision Testing Ctr. National Paper Products Quality Supervision Inspection Ctr. | Yu W.-M.,Dongguan Quality Supervision Testing Ctr. National Paper Products Quality Supervision Inspection Ctr. | Chen R.-Q.,Dongguan Quality Supervision Testing Ctr. National Paper Products Quality Supervision Inspection Ctr. | Qiu Y.-G.,Dongguan Quality Supervision Testing Ctr. National Paper Products Quality Supervision Inspection Ctr. | Qiu Y.-G.,South China University of Technology
Zhongguo Zaozhi Xuebao/Transactions of China Pulp and Paper | Year: 2013

Fiber morphologies of the tissue papers which were produced using virgin pulp (from mill B and D) and recycled pulp (from mill E) were compared. The results indicated that compared with the virgin pulp, the fibers both in recycled pulp and the resultant tissue paper had ink dirty mark, higher fluorescent whiteness and ERIC. The composition of recycled pulp was relatively complicated, it contained some mechanical pulp fibers and even undisintegrated fiber bundle. The fibrillation rate of the recycled fibers was quite high.


Yu W.-M.,Dongguan Quality Supervision Testing Ctr. National Paper Products Quality Supervision Inspection Ctr. | Chen C.-X.,Dongguan Quality Supervision Testing Ctr. National Paper Products Quality Supervision Inspection Ctr. | Chen R.-Q.,Dongguan Quality Supervision Testing Ctr. National Paper Products Quality Supervision Inspection Ctr. | Qiu Y.-G.,Dongguan Quality Supervision Testing Ctr. National Paper Products Quality Supervision Inspection Ctr. | Qiu Y.-G.,South China University of Technology
Zhongguo Zaozhi Xuebao/Transactions of China Pulp and Paper | Year: 2014

Fiber morphologies of the virgin pulp and the tissue paper produced from the pulp (from mill F) as well as the waste paper pulp and the tissue paper produced from the pulp (from mill G) were analyzed, to figure out the fibrous morphology differences. Furthermore, by adding different percent of DIP to virgin pulp to figure out the effect of the DIP on the fiber morphology of the mixed pulps. Results showed that, with increasing percent of DIP, the mixed pulps had higher Rfluor and Eric value, which was no more than 20 mg/kg when the DIP percent was less than 40%. With increasing percent of DIP, there were more mechanical pulp fiber and undisintegratedfiber bundles.

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