A Preliminary Study on the Effect of WEC Cleaner Papermaking Chemical on the Improvement of Paper Physical Strength

2014 ◽  
Vol 541-542 ◽  
pp. 18-24
Author(s):  
Yong Qiang Zhu ◽  
Feng Gao ◽  
Ping Cao ◽  
Zhan Jun Zhang
Keyword(s):  
Physical Properties ◽  
Paper Industry ◽  
Wood Pulp ◽  
Physical Strength ◽  
Chemical Pulp ◽  
Folding Endurance ◽  
Preliminary Study

In this paper, the stiffness and folding endurance of the paper were investigated with three kinds of pulp, such as the mechanical wood pulp, chemical pulp and composite pulp, after using common additives and cleaning additives. The results indicated that the stiffness of the paper can be increased by 20% ~ 30% and folding endurance can improve 20% ~ 60% after using new kind of cleaning additives no matter what kind of filler. New cleaning additives can not only improve the physical properties of paper, but also change "acidic papermaking" of the traditional paper industry into clean neutral papermaking environment. Especially, it is suitable for the production of food card paper.

Characterization and Physical Properties of Chitosan Modified APMP

2013 ◽  
Vol 848 ◽  
pp. 317-320
Author(s):  
Pei Pei Wang ◽  
Chuan Shan Zhao ◽  
Zhang Pan Chen ◽  
Wen Jia Han
Keyword(s):  
Physical Properties ◽  
Ph Value ◽  
Paper Industry ◽  
Great Influence ◽  
Wide Spread ◽  
Physical Strength ◽  
Tensile Index

With the development of world's paper industry, strength agent has become increasingly wide spread and more important.This paper describes a method for modified APMP with Chitosan, we make studies on using chitson to improve the properties of paper, and compare the effect of them based on experimential results. As a result of study,it can be concluded: The pH value and the dosage of chitosan have a great influence on the physical strength of paper.When the pH was 6 and the dosage of chitosan was 1%,the tensile index of paper could reach 30% above.

Determining the quality of paper substrates containing triticale pulp for printing industry

2020 ◽  
Vol 35 (2) ◽  
pp. 272-278
Author(s):  
Irena Bates ◽  
Ivana Plazonić ◽  
Valentina Radić Seleš ◽  
Željka Barbarić-Mikočević
Keyword(s):  
Paper Industry ◽  
Wood Pulp ◽  
Raw Material ◽  
Printing Industry ◽  
Cellulose Fibres ◽  
Paper Production ◽  
Chemical Pulp ◽  
Printing Quality ◽  
On Line ◽  
Alternative Sources

AbstractToday, the paper industry is faced with a global deficiency of raw wood materials, so alternative sources of virgin cellulose fibres are playing an important role in paper production. Agricultural countries produce large quantities of crop farming by-products such as straw, which is an interesting alternative raw material for cellulose fibres. Straw is used in many industries because of its numerous advantages: animal food industry, biofuel industry, construction industry and as artistic material. The potential use of straw production residues is of great importance in paper and printing industry. The focus of this research is on triticale straw, which was used as a non-wood fibre source for paper production. Namely, triticale straw was converted into semi-chemical pulp and was combined with recycled wood pulp in order to produce alternative laboratory papers. The usability of this kind of laboratory papers in printing industry was analysed based on line reproduction quality. This research evaluated and analysed line reproduction quality based on four line attributes: width, blurriness and raggedness. The results of this research proved that triticale pulp in laboratory papers has equal influence on line printing quality as the recycled wood pulp.

Does kraft hardwood and softwood pulp viscosity correlate to paper properties?

TAPPI Journal ◽  
2016 ◽  
Vol 15 (10) ◽  
pp. 643-651 ◽  
Author(s):  
ROBERT J. OGLESBY ◽  
HUMPHREY J. MOYNIHAN ◽  
RICARDO B. SANTOS ◽  
ASHOK GHOSH ◽  
PETER W. HART
Keyword(s):  
Physical Properties ◽  
Strength Loss ◽  
Strength Properties ◽  
Clear Correlation ◽  
Paper Properties ◽  
Physical Strength ◽  
Pulp Viscosity ◽  
Softwood Pulp ◽  
The Impact ◽  
Related Paper

The impact of commercially prepared, fully bleached pulp viscosity variation on handsheet physical properties was evaluated at different levels of pulp refining. Hardwood pulps from the same brownstock species mix, cooking parameters, and kappa numbers were processed through two different commercial bleach plants: one with a D0(EP)D1D2 sequence and the second with an OD0(EOP)D1 sequence. Additionally, a commercial softwood (predominately Scotts pine) brownstock pulp bleached by an OD0(EP)D1D2 sequence was employed in this study. Pulps with viscosities ranging from 14 to 21 mPa∙s were refined in a Valley beater to two freeness levels, and the associated handsheet physical properties were measured in this study. Over the pulp viscosity range of 14 to 21 mPa∙s, no clear correlation was found to exist between pulp viscosity and related paper physical properties. Finally, a series of laboratory prepared bleached pulps were purposely prepared under non-ideal conditions to reduce their final viscosities to lower values. Handsheets made from these pulps were tested in their unbeaten condition for physical strength properties. Significant and rapid strength loss occurred when the measured pulp viscosity dropped below 12 mPa∙s; overall strength properties showed no correlation to viscosity above the critical 12 mPa∙s value.

The Impact of Drying Methods on Paper Physical Properties

2012 ◽  
Vol 602-604 ◽  
pp. 2267-2272
Author(s):  
Shu Lei Zhao ◽  
Zheng Yuan Wei ◽  
Xiao Tian Ding ◽  
Qiang Lin
Keyword(s):  
Physical Properties ◽  
Vacuum Drying ◽  
Drying Methods ◽  
Mechanical Pulp ◽  
Bursting Strength ◽  
Tensile Index ◽  
Chemical Pulp ◽  
Drying Conditions ◽  
The Impact ◽  
Tearing Resistance

This paper experimentally examined the impact of four different drying methods (free drying, press drying, vacuum drying and impingement drying) on paper physical properties including roughness, elongation, air permeance, tearing resistance, tensile index and bursting strength. The handsheets materials are HWBKP (Hardwood Bleached Chemical Pulp), SWBKP (Softwood Bleached Chemical Pulp), CTMP (Chemical Thermo mechanical Pulp) and ATMP (Advanced Thermo Mechanical Pulp). Good experimental data were obtained for the four pulps under different drying conditions. The results of our investigation indicate that press drying have lower surface roughness, elongation and air permeance but higher tearing resistance; the vacuum drying have higher roughness, tensile index and bursting strength; the impingement drying have lower tearing resistance, tensile index and bursting strength but higher elongation and air permeance. Selection of different drying conditions for effective productivity and quality improvement potential is proposed as a direction for the future dryer design.

Using Oxone and TAED activator in non-chlorine bleaching of soda bagasse pulp

2019 ◽  
Vol 34 (4) ◽  
pp. 422-432
Author(s):  
Farhad Zeinaly ◽  
Konstantin Gabov ◽  
Hadi Kanåni Sula ◽  
Arash Babavand ◽  
Pedro Fardim
Keyword(s):  
Paper Industry ◽  
Environmental Pollutant ◽  
Pulp Bleaching ◽  
Chemical Pulp ◽  
Chlorine Bleaching ◽  
Pulp Viscosity ◽  
Paper Company ◽  
High Level ◽  
Bagasse Fiber ◽  
Bagasse Pulp

Abstract Bagasse fiber has been used in the production of bleached chemical pulp by the Pars Paper Company. In this company, a conventional three-stage sequence of hypochlorite, alkaline extraction and second hypochlorite (HEH) is applied in pulp bleaching. Pulp bleaching is one of the most important environmental pollutant stages in the pulp and paper industry. In this research, the bleaching of soda bagasse pulp by applying Oxone and TAED-activator in non-chlorine bleaching sequences has been investigated. The unbleached pulp, with kappa number of 20, 955 ml/g viscosity and 37 % brightness, was prepared from Pars Paper Company. Results indicated that, the TAED at the first and second stages were more effective than in the Oxone stages. Moreover, the sequences, which contained TAED- and Oxone-second-stage, could reach the minimum level of kappa (1.7), but the highest brightness (80 %) was attained by using only TAED with a comparatively high level of pulp viscosity (752).

Comprehensive utilization of Ganoderma lucidum residues in papermaking

2020 ◽  
Vol 35 (1) ◽  
pp. 43-49
Author(s):  
Jie Sheng ◽  
Wei Wang ◽  
Qianli Ma ◽  
Rendang Yang
Keyword(s):  
Physical Properties ◽  
Environmental Pollution ◽  
Ganoderma Lucidum ◽  
Raw Materials ◽  
Alkyl Ketene Dimer ◽  
Plant Fiber ◽  
Comprehensive Utilization ◽  
Tear Index ◽  
Folding Endurance

AbstractThis study aimed to fully utilize Ganoderma lucidum (called lingzhi in China, reishi in Japan) residues as raw materials and a sizing agent in the papermaking industry to alleviate their environmental pollution and the shortage of papermaking resources. The refined Ganoderma lucidum residues can be used to replace 30 % of the plant pulps. Moreover, the prepared papers had better physical properties than pure plant fiber papers. After polysaccharide extracting, the tear index and folding endurance increased by 26 % and 34 %, respectively. In addition, the Ganoderma lucidum residues-based resin as a sizing agent achieved a similar effect of alkyl ketene dimer (AKD). The Cobb index reduced from 84.1\hspace{0.1667em}\text{g}\hspace{0.1667em}{\text{m}^{-2}} to 72.5\hspace{0.1667em}\text{g}\hspace{0.1667em}{\text{m}^{-2}}.

Preparation and Properties of Multi-Layer Composite Paperboard

2013 ◽  
Vol 774-776 ◽  
pp. 1010-1013
Author(s):  
Quan Xiao Liu ◽  
Dan Xi Li ◽  
Fei Ma ◽  
Chang Qing Chen ◽  
Jun Yang
Keyword(s):  
Wheat Straw ◽  
Raw Materials ◽  
Pulp Fiber ◽  
Paper Pulp ◽  
Mechanical Pulp ◽  
Physical Strength ◽  
Chemical Pulp ◽  
Layer Composite ◽  
Wheat Straw Pulp ◽  
The Cost

In order to study the preparation and property of the multi layer composite paperboard, bleached wheat straw pulp, bleached chemical thermal mechanical pulp and waste newsprint pulp are used as raw materials to making paperboard. The results show that the bonding force between fibers of grasses chemical pulp is strong which can improve the bonding strength between the layers. Bleached wheat straw pulp is used as outer layer and waste news paper pulp is used as inner layer to make composite paperboard has high physical properties. Bleached chemical thermal mechanical pulp fiber is shorter, so paperboard tightness and physical strength reduce, which can be used as the lining of the multi layer composite paperboard to improve the stiffness of the paperboard and reduce the cost.

scholarly journals Modification of physical properties of poly(L-lactic acid) by addition of methyl-β-cyclodextrin

2014 ◽  
Vol 10 ◽  
pp. 2997-3006 ◽  
Author(s):  
Toshiyuki Suzuki ◽  
Ayaka Ei ◽  
Yoshihisa Takada ◽  
Hiroki Uehara ◽  
Takeshi Yamanobe ◽  
...  
Keyword(s):  
Thermal Analysis ◽  
Lactic Acid ◽  
Physical Properties ◽  
General Purpose ◽  
Scanning Calorimetry ◽  
Amorphous Component ◽  
Physical Strength ◽  
Biobased Materials ◽  
High Affinity

Poly(L-lactic acid) (PLLA) is a biodegradable plastic and one of the most famous plastics made from biobased materials. However, its physical strength is insufficient compared to general-purpose plastics. In this study, the effect of methylcyclodextrin (MeCD) addition on the structure and physical properties, especially the drawing behavior, of PLLA was investigated. Through thermal analysis, it was found that MeCD addition lowers the crystallinity and enhances the mobility of PLLA. The sample containing approximately 17% MeCD was drawn to more than 1000% at 60 °C, although PLLA fractured at a strain of less than 100%. Differential scanning calorimetry (DSC)-Raman in situ measurements also revealed decreases in the glass transition temperature (T g), cold crystallization temperature (T c), and melting point (T m), and improvement in structural distribution with temperature. DSC-Raman measurements simultaneously supplied information about crystallinity and thermal properties. Thus, it was concluded that MeCD had high affinity for PLLA, and the addition of MeCD increased the amorphous component of PLLA and enhanced the drawability.

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