scholarly journals Potensi Tiga Jenis Kayu Tanah Gambut Sumatera sebagai Bahan Baku Pulp dan Kertas (The Potential of Three Peat Land Woods of Sumatera as Pulp and Paper Raw Material)

2021 ◽  
Vol 17 (2) ◽  
pp. 112-121
Author(s):  
Kanti D Rizqiani ◽  
Yeni Aprianis ◽  
Ahmad Junaedi
Keyword(s):  
Specific Gravity ◽  
Exotic Species ◽  
Wood Species ◽  
Government Regulation ◽  
Fiber Quality ◽  
Wood Properties ◽  
Pulp And Paper ◽  
Raw Material ◽  
Pulp Wood

The growth of pulp and paper industries has encouraged the expansion of the industrial plantation forests for pulp wood. The  exotic species planted for pulp wood initially maintained a relatively high productivity, however it decreases in the following rotation cycles.  The peat land wood species of Sumatera could be an alternative for exotic species. However, the insufficient information on the wood properties has brought about they are less considered. This paper examined the fiber quality of Sumatran local peat-wood and its possibility as a raw material of pulp and paper. For specific gravity, samples were selected based on three different diameter groups in each plot. Fiber properties (dimension and fiber derivative values) used to asses the suitability of the wood for pulp and paper raw material were determined in accordance with the method of the Forest Product Laboratory (FPL). The resulted data and information were compared to those of krasikarpa (Acacia crassicarpa Benth.). The results showed that the fiber quality of sekubung wood was classified into grade II, while gerunggang and mahang putih were classified into grade III. The specific gravity of gerunggang wood was higher than these of other woods and comparable to that of krasikarpa. Although the growth of Sumatran local peat-wood is still low, however, conformity with government regulations (Government Regulation Number 57-2016 and Ministry of Environment and Forestry Regulation Number 17-2017) and fiber quality, the local peat-wood could potentially substitute the exotic wood species.

Raw Material Quality of Short-Rotation, Intensively Cultured Populus Clones. II. Wood and Bark from First-Rotation Stems and Stems Grown from Coppice

IAWA Journal ◽  
1987 ◽  
Vol 8 (2) ◽  
pp. 182-186
Author(s):  
J.E. Phelps ◽  
J.G. Isebrands ◽  
R.M. Teclaw
Keyword(s):  
Specific Gravity ◽  
Fibre Length ◽  
Wood Properties ◽  
Raw Material ◽  
Short Rotation ◽  
Growth System ◽  
Basal Portion ◽  
Dormant Season ◽  
Hybrid Clones

The coppicing ability of Populus hybrid clones after dormant season harvesting is weil suited to a short-rotation, intensively cultured (SRIC) growth system. stems formed from coppice exhibit a greater amount of growth than first-rotation trees during the juvenile stage. This research examines and compares properties, including specific gravity and fibre length of the wood and bark, of 3-year-old firstrotation stems (from cuttings) and 3-year-old coppiced stems of three hybrid Populus clones grown und er SRIC. Trees produced from coppiced stumps were 1.5 to 2.5 times larger (in height and diameter at the base) than first-rotation trees after 3 years of growth. Some of the wood properties of the first-rotation trees differed from those of the coppiced trees. For example, wood specific gravity was higher and wood fibres were longer in the sampies removed from the basal portion of the first-rotation trees. Although significant, these differences were small and not important from an industrial standpoint. The increase in woody biom ass after coppicing is likely to be more important to industry than any decreases in wood properties expected during short-rotation, intensive culture of Populus trees.

An Experimental Study to Find the Acoustic Quality Indicators of Mulberry Wood

2010 ◽  
Author(s):  
Hossein Mansour ◽  
Mehdi Behzad
Keyword(s):  
Wood Species ◽  
Musical Instrument ◽  
Musical Instruments ◽  
Raw Material ◽  
Test Case ◽  
High Quality ◽  
Perceptual Knowledge ◽  
Acoustical Properties ◽  
Acoustic Quality

Morus Alba or mulberry is a wood species that is broadly used in making musical instruments in Eastern countries. However, the mechanical and acoustical properties of this type of wood are not investigated properly. In this study a set of features, previously examined for other species, are applied to this wood and its acoustic quality is evaluated. Setar, a Persian musical instrument made of mulberry wood, is selected as the test case of this experiment. Different samples of wood are gathered and categorized based on their appropriateness for Setar construction. The quality of each sample is identified based on the Perceptual knowledge of professional Setar makers. The most effective features are then selected and their average values are calculated for high quality samples. The result of this study helps Setar makers to select proper raw material before making an instrument. In addition, this approach can be applied to other wood species used in music industry.

scholarly journals EFFECT OF USING WHEY POWDER ON THE PROPERTIES OF PULP AND PAPER OBTAINED FROM STORED BAGASSE

2021 ◽  
Vol 55 (7-8) ◽  
pp. 799-807
Author(s):  
PEJMAN REZAYATI-CHARANI ◽  
AHMAD AZIZI MOSSELLO ◽  
MOHAMMAD BERVAIE
Keyword(s):  
Paper Industry ◽  
Pulp And Paper Industry ◽  
Pulp And Paper ◽  
Raw Material ◽  
Qualitative Properties ◽  
Paper Properties ◽  
Whey Powder ◽  
Soda Pulp

The aim of this study was to investigate the effect of using whey powder (different concentrations and treatment repetitions) as a probiotic agent on the quantitative and qualitative properties of stored bagasse intended for use in the pulp and paper industry. For this purpose, whey powder was added in three concentrations and the treatment was applied once or twice. After that, soda pulp was prepared under conventional conditions. Then, handsheets (80 g/m2) were made and tested in terms of paper properties, and the results were compared. The findings revealed that increasing the concentration of whey powder and the number of treatments significantly improved the pulp and paper characteristics, thus, using the treatment with 2% whey powder twice and 0.4% whey powder once led to the best results for bagasse protection in terms of quality of the raw material, pulp and handsheets.

Distribution and characterisation of discolouring substances in Norway spruce (Picea abies L. Karst.) pulp wood stored under water sprinkling

Holzforschung ◽  
2006 ◽  
Vol 60 (1) ◽  
pp. 93-98 ◽  
Author(s):  
Lars Hildén ◽  
Jing Zhang ◽  
Erik Persson ◽  
Gunnar Johansson ◽  
Jonas Brändström
Keyword(s):  
Norway Spruce ◽  
Manganese Peroxidase ◽  
Raw Material ◽  
Model Studies ◽  
Wet Storage ◽  
Negative Effect ◽  
A Minor ◽  
Pulp Wood

Abstract Discolouration of wood raw material during wet storage has a notable negative effect on the quality of the final product. In this study, fluorescence microscopy was used to investigate the spatial distribution of discolouring substances in water-sprinkled Norway spruce pulpwood. Water-sprinkled wood was characterised by the presence of discolouring substances on the pit membranes of wood cells. In vitro model studies on the interaction between a model bark substance (tannic acid) and torus constituents support the hypothesis that pectic structures facilitate the allocation of bark substances on pit membranes. Applied pectinase or tannase could not remove the discolouring substances from pit membranes. Manganese peroxidase had a minor but documented effect. The effect of manganese peroxidase, as well as HCl/vanillin labelling, indicated that the discolouring substance may be condensed tannins.

scholarly journals Compression Properties of Small Clear Southern Yellow Pine Specimens Tested across Five Decades

2021 ◽  
Vol 71 (3) ◽  
pp. 240-245
Author(s):  
Rubin Shmulsky ◽  
Frederico José Nistal França ◽  
J. Tedrick Ratcliff ◽  
Benjamin Farber ◽  
C. Adam Senalik ◽  
...  
Keyword(s):  
Specific Gravity ◽  
Moisture Content ◽  
Wood Properties ◽  
Strength Properties ◽  
Raw Material ◽  
Clear Wood ◽  
Compression Properties ◽  
Three Samples ◽  
Yellow Pine ◽  
Southern Yellow Pine

Abstract Southern yellow pine (SYP) is one of the most used softwood species in the world. Most of this raw material come from fast-grown plantation trees. It is of interest to determine if SYP clear wood properties may have changed over the long term, in particular whether such properties may have declined. Herein, specific gravity (SG), ultimate compression strength parallel to grain (UCS‖), and UCS perpendicular to grain (UCS⊥) from three samples were compared: Sample 1 tested in 2014; Sample 2 from molding and millwork producers tested in 2017–2019; and Sample 3 from a study conducted in the mid-1960s. With respect to specific gravity (SG), the wood in Sample 1 was significantly lower than that from Samples 2 and 3. With respect to UCS‖, all three samples were statistically different. Adjusting to 12 percent moisture content had no influence on the mean separation of UCS‖. With respect to UCS⊥, no statistically significant differences were detected among the test data from any of the three samples. However, for the UCS data generated from the SG and moisture content–related model, Sample 2 was higher than Sample 3, and Sample 3 was higher than Sample 1, and these differences were statistically significant. Overall, these findings do not suggest that broad or consistent changes or declines of these wood strength properties have occurred during the past five decades.

Raw-Material Quality of Fast Grown Eucalyptijs Globulus During the First Year

IAWA Journal ◽  
1990 ◽  
Vol 11 (4) ◽  
pp. 421-427 ◽  
Author(s):  
Helena Pereira ◽  
Clara Araújo
Keyword(s):  
Specific Gravity ◽  
Management Strategy ◽  
Management Strategies ◽  
Fibre Length ◽  
Raw Material ◽  
First Year ◽  
Wood Moisture ◽  
Material Quality ◽  
Old Trees

The raw material quality of Eucalyptus globulus during the first year was assessed in an experimental plantation established under four management strategies (control, fertiliser, irrigation and fertiliser/irrigation). The variation of bark content, moisture content, specific gravity and fibre length along the stem for 6-months and II-months-old trees is presented. Bark content decreases with tree diameter and was lowest for the irrigated and fertilised trees. Wood moisture was negatively correlated with specific gravity. No correlation was found between specific gravity and growth rate and fibre length was generally independent of management strategy.

A Comparative Study on Wood Properties of Teaks from Different Geographical Provenances

2012 ◽  
Vol 430-432 ◽  
pp. 508-511
Author(s):  
Peng Xiang Peng ◽  
Kai Fu Li ◽  
Kun Nan Liang ◽  
Kai Meng Xu
Keyword(s):  
Comparative Study ◽  
Wood Species ◽  
Basic Density ◽  
Hainan Island ◽  
Wood Properties ◽  
Teak Wood ◽  
The Relationship ◽  
Obvious Relation ◽  
Selection Of

In order to understand the effects of geographical provenances of teak on wood properties and improve the quality of afforestation in china, research was carried on wood properties of eight provenances of teak at age 27 in Ledong Country, Hainan Island. The slices revealed that the constructional characteristics from different geographical provenances of teak were very similar. But the effect of geographical provenance on teak wood properties was highly significant. The relationship results for properties of teak showed that properties of most wood species had the obvious relation with basic density, which can be used to guide the selection of the teak provenance in the early planting to improve the quality of teak.

scholarly journals Pemanfaatan Tanah Liat Bakar pada Situs Blandongan dan Candi Jiwa, di Kompleks Situs Batujaya, Kabupaten Karawang, Provinsi Jawa Barat (Studi Bahan Baku Berdasarkan Analisis Laboratorium

AMERTA ◽  
2020 ◽  
Vol 25 (1) ◽  
pp. 12-23
Author(s):  
Ni Komang Ayu Astiti
Keyword(s):  
Specific Gravity ◽  
Chemical Elements ◽  
Raw Material ◽  
West Java ◽  
Surrounding Environment ◽  
Temple Complex ◽  
The People ◽  
Almost All ◽  
The Temple

ABSTRACT. The use of Baked Clay at the of Blandongan and Jiwa Temples at Batujaya Temple Complex, Karawang Regency,West Java Province: Study on Row Material of Artifacts  Based on Laboratory Analyses. The site of Batujaya, which is located at at the Segaran Village, Batujaya District, Karawang Regency, West Java Province, is a complex of temples (candies) that use clay from the surrounding environment as their main raw material. The people of Batujaya have mastered the technology of brick-making to build the temples and pottery making. This is proven by the fact that almost all of the 14 candis used baked clay and by the abundance of pottery found around the temple complex, both intact and fragmented ones. Result of laboratory analyses on some pottery samples from this site show physical characteristics and compositions of chemical elements, which are varied in terms of hardness, specific gravity, porosity, water absorption, and baking temperature. The quality of the pottery is also varied, depending on the condition of the raw material and the level of technological mastery of the potters. ABSTRAK. Situs Batujaya yang terletak di Desa Segaran, Kecamatan Batujaya, Kabupaten Kerawang, Provinsi Jawa Barat, merupakan sebuah kompleks percandian yang memanfaatkan tanah liat di sekitarnya sebagai bahan utama pembuatannya. Masyarakat pendukung kompleks percandian ini sudah mengenal teknologi pengolahan tanah liat menjadi bata untuk bahan pembuatan candi dan teknologi pembuatan wadah-wadah dari tanah liat bakar. Hal ini dibuktikan dengan hampir seluruh unur (14 buah) candi mempergunakan bahan bata dan banyaknya temuan tembikar disekitar kompleks percandian, baik dalam keadaan utuh maupun dalam pecahan. Hasil analisis laboratorium terhadap beberapa sampel tembikar dari situs ini memperlihatkan sifat-sifat fisik dan komposisi unsur kimia yang sangat bervariasi dalam kekerasan, berat jenis, porositas, serapan air, dan suhu pembakaran. Kualitas tembikar juga sangat bervariasi, dipengaruhi oleh kondisi bahan baku dan tingkat penguasaan teknologi pembuatannya.

scholarly journals Analisis Kimia dari Serat Kayu Bangkal (Nauclea officinalis) sebagai Alternatif Bahan Baku Pulp Kertas (Chemical Analysis of Bangkal (Nauclea Officinalis) Wood Fibers as Raw Material Alternative of Pulp & Paper)

2018 ◽  
Vol 10 (1) ◽  
pp. 21-32
Author(s):  
Herlina Herlina ◽  
Wiwin Tyas Istikowati, Ph.D. ◽  
Fatriani Fatriani
Keyword(s):  
Fiber Diameter ◽  
Wood Fiber ◽  
Pulp And Paper ◽  
Raw Material ◽  
Chemical Components ◽  
Natural Forests ◽  
Wood Fibers ◽  
Pulp Paper ◽  
Chemical Content

South Kalimantan has considerable natural forests and many types of timber that have not yet been optimally utilized, such as Bangkal tree (Nauclea officinalis). The purpose of this research was to analyze chemical components, dimensional fibers characteristic, and suitability of Bangkal wood as a raw material of pulp and paper. The results obtained from this study revealed that the chemical content of Bangkal wood consisted of 3.00% extractive, 30.00% lignin, 16% hemicellulose, and 50.50% cellulose. The anatomy of Bangkal wood were 1.40 mm in fiber length 1.40 mm, 1.20 μm in fiber diameter, 5.00 μm in lumen diameter, and 3.25 μm in cell wall thickness. Derived fiber values comprised Runkel Ratio (0.43), Power Weaving (66.00), Muhsteph Ratio (99.80%), Coefficient of Rigidity (0.20), and Flexibility Ratio (0.71). Based on the chemical components and quality of Bangkal wood fiber, that wood could be used as a raw material of pulp and paper.

scholarly journals High yield CTMP fibres as a possibility of the more efficient yield of wood raw material

2004 ◽  
Vol 58 (5) ◽  
pp. 217-220
Author(s):  
Bojana Klasnja ◽  
Spiro Kopitovic ◽  
Stanislav Herak
Keyword(s):  
Adverse Effect ◽  
Paper Industry ◽  
Pulp And Paper Industry ◽  
Pulp And Paper ◽  
Raw Material ◽  
High Yield ◽  
Limiting Factor ◽  
Chemical Pulp ◽  
Sulphate Pulp

The evident shortage of wood as a raw material has become a limiting factor in the pulp and paper industry which is the greatest consumer of wood in Europe. The situation in our country is similar. During the few past years, the production of poplar and willow pulpwood was 220.000 m3 per year, which is insufficient for the planned increase in the production of sulphate pulp (175.000 tons till 2005). This paper deals with the aspects of the more efficient yield of raw material, based on the significantly higher yield of CTMP fibres, as well as with the significance of the lower adverse effect on the environment. It also analyses the conditions of production and the quality of the obtained fibres, as a possible substitute for chemical pulp and secondary fibres in papers of different quality. The main reasons for the production and use of CTMP fibres in our country are reported.

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