scholarly journals GLOBAL PRODUCTION CONCENTRATION OF MEDIUM DENSITY FIBERBOARD (MDF) (1995 - 2016)

2018 ◽  
Vol 42 (5) ◽  
Author(s):  
Thaisa de Sousa Selvatti ◽  
Luis Antônio Coimbra Borges ◽  
Helena Cristina Carvalho Soares ◽  
Álvaro Nogueira de Souza ◽  
Luiz Moreira Coelho Junior
Keyword(s):  
Gini Index ◽  
Concentration Ratio ◽  
Concentration Index ◽  
Medium Density Fiberboard ◽  
Average Concentration ◽  
Medium Density ◽  
High Concentration ◽  
The World ◽  
Concentration Degree ◽  
Production Concentration

ABSTRACT This papaer analyzed the global MDF production and its concentration degree between 1995 and 2016. In order to measure and analyze this concentration, we used the Concentration Ratio [CR(k)], the Herfindahl-Hirschman Index (HHI), Theil Entropy Index (E), Hall and Tideman Index (HTI), the Comprehensive Concentration Index (CCI), and the Gini Index (G). Global MDF production grew 12.81% p.a. from 1995 to 2016, reaching 99 million m3 at the end of the time series. China took over the hegemony in 2001 and arrived in 2016 with about 60% of the world’s MDF supply. The CR(k) of the global MDF production inferred a high concentration, mainly in the CR(4) from 2009. The CR(8) remained with a moderately high average concentration. During this period more than 90% of the offer was retained in the CR(20). The HHI, E and HTI indices corroborate that there is high concentration in global MDF production, as well as the CCI in the studied period. The inequality indicated by G also presented increasing behavior and was classified as strong and very strong. The concentration indicators were efficient in evaluating the concentration degree of the world MDF supply.

scholarly journals GLOBAL CONCENTRATION OF PULP EXPORTS

FLORESTA ◽  
2018 ◽  
Vol 48 (4) ◽  
pp. 443 ◽  
Author(s):  
Luiz Moreira Coelho Junior ◽  
Thaisa De Sousa Selvatti ◽  
Filipe Vanderlei Alencar ◽  
Edvaldo Pereira Santos Júnior ◽  
Luís Antônio Coimbra Borges ◽  
...  
Keyword(s):  
Population Growth ◽  
Competitive Advantage ◽  
Gini Coefficient ◽  
Concentration Ratio ◽  
Concentration Index ◽  
High Concentration ◽  
Oligopolistic Market ◽  
Per Capita ◽  
Oligopolistic Market Structure ◽  
Per Capita Consumption

This study analyzed the evolution and degree of the global concentration of pulp exports from 1961 to 2014. In order to measure and analyze the concentration, the following indicators were used: Concentration Ratio [CR(k)]; Herfindahl-Hirschman Index (HHI); Theil Entropy Index (E); Hall and Tideman Index (HTI); Comprehensive Concentration Index (CCI); and Gini Coefficient (G). We concluded that there was a tendency of growth in the global pulp exports during the analyzed period due to an increase in demand driven by population growth and to per capita consumption, enhancing the increase in the number of exporting countries. The CR(k) of the global pulp exporting countries showed that the four [CR(4)] and eight [CR(8)] largest countries present a high concentration, with an oligopolistic market structure and competitive advantage. About 100% of exports are dominated by the 20 largest countries [CR(20)]. The HHI, E, HTI, and CCI indicators showed that there is a concentration in global pulp exportation and presented a deconcentrating tendency. Despite the increase in the number of exporting countries, there was no significant reduction in the inequality of global pulp exports. According to the Gini Coefficient, the inequality was strong to absolute.

scholarly journals Calcium carbonate modified urea–formaldehyde resin adhesive for strength enhanced medium density fiberboard production

RSC Advances ◽  
2021 ◽  
Vol 11 (40) ◽  
pp. 25010-25017
Author(s):  
Li Lu ◽  
Yan Wang ◽  
Tianhua Li ◽  
Supeng Wang ◽  
Shoulu Yang ◽  
...  
Keyword(s):  
Calcium Carbonate ◽  
Urea Formaldehyde ◽  
Medium Density Fiberboard ◽  
Urea Formaldehyde Resin ◽  
Formaldehyde Resin ◽  
Medium Density ◽  
Ionic Bond ◽  
Resin Adhesive ◽  
Uf Resin ◽  
Modified Urea

Reactions between CaCO3 and CH2O2 during polycondensation of UF resin produce Ca2+. Ionic bond complexation binds Ca2+ with UF resin. The UF resin crystalline percentage decreases from 26.86% to 22.71%. IB strength of resin bonded fiberboard increases from 0.75 to 0.94 MPa.

Effect of species and grinding disc distance on the surface roughness parameters of medium density fiberboard

2016 ◽  
Vol 75 (3) ◽  
pp. 335-346 ◽  
Author(s):  
Lidia Gurau ◽  
Nadir Ayrilmis ◽  
Jan Thore Benthien ◽  
Martin Ohlmeyer ◽  
Manja Kitek Kuzman ◽  
...  
Keyword(s):  
Surface Roughness ◽  
Medium Density Fiberboard ◽  
Medium Density ◽  
Roughness Parameters ◽  
Surface Roughness Parameters

Investigation of TiCrN-Coated High Speed Steel Tools Wear during Medium Density Fiberboard Milling

2021 ◽  
Vol 42 (2) ◽  
pp. 124-129
Author(s):  
D. Kazlauskas ◽  
G. Keturakis ◽  
V. Jankauskas ◽  
A. Andriušis
Keyword(s):  
High Speed ◽  
Medium Density Fiberboard ◽  
High Speed Steel ◽  
Medium Density ◽  
Tools Wear

CONCENTRATION AND REGIONALIZATION OF AGRICULTURE IN THE WORLD

2021 ◽  
Vol XIII (1) ◽  
pp. 36-47
Author(s):  
Magdalena Golonko ◽  
Marcin Wysokiński ◽  
Arkadiusz Gromada
Keyword(s):  
South America ◽  
Agricultural Production ◽  
Concentration Level ◽  
Relative Increase ◽  
Animal Production ◽  
Agricultural Products ◽  
Plant Production ◽  
High Concentration ◽  
The World ◽  
Research Period

The main purpose of the article was to assess the regionalization of agricultural production in the world and the changes occurring in this aspect. The article presents the concentration level of agricultural production in the world by continent. The source of materials was data from FAOSTAT. The research period covered the years 2004 - 2016. In the analyzed period, the value of gross agricultural production doubled. Various trends were observed within the period studied. In the years 2004-2010, in all regions of the world, there was an increase in gross production of agriculture, while in the period 2010-2016 only in two – North America and Asia. It was noted that there was a high concentration of agricultural production, mainly concentrated in Asia and Europe. In the analyzed period, there was a relative increase in the share of agricultural production in Asia and South America as compared to other regions. Individual groups of agricultural products, such as cereals and animal production, were also analyzed. In both cases, concentration was different. The pace of concentration in animal production was higher than in plant production.

Utilisation possibilities of waste medium-density fiberboard: A material recycling process

2021 ◽  
Author(s):  
S. Thirugnanam ◽  
R. Srinivasan ◽  
Kshitij Anand ◽  
Abhishek Bhardwaj ◽  
G. Puthilibai ◽  
...  
Keyword(s):  
Medium Density Fiberboard ◽  
Medium Density ◽  
Recycling Process ◽  
Material Recycling
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