Raw material wood wool | data | facts | markets | 1. November 201 Author | Hanspeter Frey | Information date | 1. November 2012 Raw material wood wool Data | facts | markets Food Logistics Erosion protection mats Evaporative coolers Udder hygiene
Raw material wood wool
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Microsoft Word - Werkstoff_Holzwolle_Lindner_Suisse_Übersetzungsvorlage_EN.docRaw material wood wool | data | facts | markets | 1. November 201
Author | Hanspeter Frey | Information date | 1. November 2012
Raw material wood wool Data | facts | markets
Food Logistics Erosion protection mats
Evaporative coolers Udder hygiene
© 2012 by Hanspeter Frey | 9620 Lichtensteig | Schweiz | [email protected] The copying and distribution of this pdf. document is expressly permitted, in particular for training purposes.
Raw material wood wool | data | facts | markets | 1. November 2012 3
Roundwoodofthehighestquality nowastewood freefrom additives
[alsofreefromwoodpreservatives] freefrombindingagents chippingtechniqueprotects woodfibres problem-freedisposalofwaste
Wood wool | Definition
Wood wool is a multi-functional raw material produced mechanically by wood
wool machines in the form of fine, elastic, almost dust free wood wool fibres, up
to 500 mm long and free from wood splinters. It is produced from debarked
hardwoods and softwoods of the highest quality classifications [FSC and PEFC
certified], which - depending on use - is air-dried to up to 13 % wood moisture.
In Switzerland wood wool is produced in conformity with the Swiss Wood
Wool Standard, which came in force on 1st June 2011.
However, before this wood raw material, which originally came from the USA,
appeared in Europe in the 1880's the expression, "wood wool" had , however,
already been used for two quite different products.
At the International Exhibition in Paris in 1885 the French architect and
decorator Edouard Guichard [1815-1889] exhibited his "jaine de bois" [wood
wool] as a cost-effective substitute for shavings of flocking for the
production of wallpapers. These were very thin wood shavings boiled in
soapy water
In 1883 the surgeon, Gustav Adolf Walcher [1856-1935] described in his
thesis how he had produced anti-septic bandages from wood fibres, which
he called sublimate wood wool bandages.
4 Raw material wood wool | data | facts | markets | 1. November 2012
Wood wool | Definition
Raw material wood wool | data | facts | markets | 1. November 2012 5
loosely networked
loose
bound
usually also contains waste wood
6 Raw material wood wool | data | facts | markets | 1. November 2012
Source|proHolz
Wood | Properties
Wood can be quite generally divided into chemical, physical and biological properties. These
are fully used in the production of the multi-functional wood raw material, "wood wool".
In order properly to use wood and wood raw materials, it is necessary to understand the advantages and
disadvantages connected with the properties of wood, in order to be able to advocate the use of wood as a
modern construction and raw material. As well as using the properties of wood, however, the wood must
be handled and processed, as well as being used sensibly in processes that complement each other, in
order to make use of the strength of wood.
Arguments for wood
Natural durability
Good bonding with other raw materials
Good thermal properties, can be used not merely as a fuel
Wood moisture Wood is a hydroscopic, inhomogeneous and anisotropic raw material:
Hydroscopic - absorbs or emits water vapour from the environment.
Inhomogeneous - there is no equivalent constructed raw material. It is unique in its three anatomical
directions of cutting and each species of timber has its individual structure.
Anisotropic - in its three cutting directions (longitudinal, radial and tangential) wood possesses
different properties (e.g. shrinkage and swelling, strengths, thermal conductivity, etc.)
In changing climatic conditions (temperature and relative humidity) the moisture content of wood alters. In
a damp climate dry wood absorbs moisture and in a dry climate wood emits water. In both cases a steady
state is ultimately reached, which is designated as the equilibrium moisture of wood.
Biological properties
Wood is biodegradable, and is, however, therefore also susceptible to biotic pests For example, it can be
attacked by insects, fungi or bacteria and its substance can be destroyed with long-lasting effects. At wood
moisture of 15 % wood is vulnerable to attack by fungi.
Anisotropy The properties of wood can be divided into the three anatomical basic directions of the wood (axial, radial,
and tangential). This leads to unequal shrinkage of the wood when it dries out. In Central European
species of timber the maximum amount of shrinkage in the centre is axially 0.3 %, radially 5 % and
tangentially 10 %. Thus, when it dries out wood shrinks about twice as much tangentially (parallel to the
annual growth rings) as radially (parallel to the wood rays), so that particularly in large-dimensioned timber
slight radial cracks appear. The swelling / shrinkage coefficient gives the size alteration per cent of
alteration in wood moisture.
Raw material wood wool | data | facts | markets | 1. November 2012 7
Production Chipping of the round wood to produce wood wool in
accordance with the wood wool formula involves among
other things the selection of the species of tree and its
dimensions [length, thickness and breadth].
End product
Raw material Round wood of the highest quality from certified
hardwood and softwood storage [air-dried].
Wood wool formula For every use the individual wood wool mix is calculated
on the basis of the data provided by the user. For it is
only in this way that the varied biological, chemical and
physical properties of the different tree species can be
used to the full.
8 Raw material wood wool | data | facts | markets | 1. November 2012
MULCH
Wood wool | Raw material circulation | Agriculture
RAW MATERIAL Round wood of the highest quality from certified hardwoods and softwoods
PRODUCTION Selection of the wood wool filaments - timber species and dimensions
Free from foreign matter and additives
First use Second use
MULCH loose wood wool and /or wood wool mats
UDDER HYGIENE loose special wood wool
VEGETABLES | FRUIT | CROPS loose wood wool and / or wood wool mats
UDDER HYGIENE
Waste disposal Problem-free ecological waste disposal via second use
Raw material wood wool | data | facts | markets | 1. November 2012 9
Wood wool | Uses
Its "invisibility" is testimony to the quality of wood wool. What at first seems to be
an objection becomes logical once you have examined it closely. Wood wool has
been and is used where its proven unique biological, chemical and physical
properties show to advantage. For healthy wood is a sustainable raw material
with a convincing life cycle assessment. In addition, cost benefit considerations
have played and play a decisive role in the use of wood wool, whenever
resourceful, innovative entrepreneurs have developed new products and
solutions for problems and have brought them and bring them on to the market.
From the very beginning these people have been successful in business, with
the motto, “wood wool is everywhere - from birth to the final step". Since the mid-
19th century this has been proved to be tried and tested in hundreds of ideas
and products. Nowadays loose wood wool is used in the following sectors and
products:
CONSTRUCTION
SPORTS EQUIPMENT
10 Raw material wood wool | data | facts | markets | 1. November 2012
Wood wool | Uses
ANIMAL HUSBANDRY
FILTER TECHNOLOGY
EVAPORATIVE COOLERS
VARIOUS
KINDLING
TAXIDERMY
Raw material wood wool | data | facts | markets | 1. November 2012 11
Wood wool machines
Wood wool machines are planing machines, which have been especially
developed to produce fine, elastic, almost dust free, loose, untreated wood wool
fibres, up to 500 mm long and free from wood splinters.
In 1842 William Baker from Utica in New York State in the USA obtained US
Patent No. 2654 for his wood wool machine, entitled "Machine for manufacturing
wood so as to be used as a substitute for curled hair in stuffing beds". Nine
years later Edwin K. Browning's US Patent No. 8217 bore the title, "Machine for
cutting wood into shreds and crimping them for mattress stuffing, &c."
"Machine for manufacturing wood so as to be used as a substitute for curled hair in stuffing beds" by William Baker from Utica New York State in the USA from 1842 [Illustration from the patent specification]
12 Raw material wood wool | data | facts | markets | 1. November 2012
Quadruple-acting wood wool
SöhneinFlensburg
Wood wool machines That wood wool became an increasingly important, even essential raw material
from the mid-19th century first of all in North America and belatedly in Europe
proves the constantly growing supply of wood wool machines as well as machines
designed to process the wood wool efficiently into products of all sorts. The ideas
and claims of the wood wool producers and wood wool users drove the machine
engineers to a frenzy of development of increasingly high-performance wood
processing machines, which they proudly presented at industrial exhibitions and
sold in huge quantities. This was the pattern not only for the many patents, but also
most notably for the lavish and costly product catalogues of the American wood
processing machine industry. With these machines it was possible to earn good
money.
The triumphal progress of wood wool in the USA awakened the interest of
creative minds in Europe as well. These people were not willing to surrender the
obviously lucrative business of industrial wood processing to the Americans without
a struggle. The pre-requisites for almost certain commercial success had been
recognised, and the basic raw material - the forest - lay almost at the front door in
every region of the Old Continent. For the German Empire, Austro-Hungary,
France, Great Britain and Switzerland were ideal production and sales areas.
Together with Johann Anthon, who founded an iron foundry and machine
factory for the production of wool processing machines in 1865 in Flensburg, Ernst
Kirchner [1853-1930] was from the start one of the most successful producers of
wood wool machines in Europe. The former locksmith's apprentice from Kotteritz
near Altenburg in Thuringia became inspired when he visited the USA on several
occasions as a sales representative for a Chemnitz machine tool manufacturer. It
was his visit to the World Exhibition in Philadelphia in 1876 which prompted his
decision to produce these wood processing machines, which were hardly known in
Europe, on his own account in Germany and to sell them all over the world.
Raw material wood wool | data | facts | markets | 1. November 2012 13
Wood wool | Chronological table
1805 On 13th August John Matthews from Philadelphia is awarded US Patent No. 633X, entitled "Machine for
grinding and sawing dye woods" for the first "excelsior machine".
1842 On 30th May William Baker [1795-1871] from Utica in the US Federal State of New York is awarded US Patent No. 2654, entitled "Machine for manufacturing wood so as to be used as a substitute for curled hair in stuffing beds" [wood wool machine].
1843 Friedrich Gottlob Keller [1816-1895] from Hainichen in Saxony invents the process for producing paper from groundwood pulp.
1855 At the World Exhibition in Paris the French architect and decorator, Edouard Guichard [1815-1889] exhibits his "jaine de bois" [wood wool] as a cost-effective substitute for shavings of flocking for the production of wallpapers.
1868 Friedrich Voith [1840-1913], the entrepreneur from Heidenheim submits his first patent for a wood grinder with a toothed loading rack.
1873 At the Centennial International Exhibition of Arts, Manufactures and Products of the Soil and Mines in Philadelphia in the USA the American wood wool machines excited huge interest amongst the many German visitors.
1883 Gustav Adolf Walcher [1856-1935] took his PH.D. at the University of Tübingen with the thesis,
"Concerning the use of lignin as antiseptic bandaging, in particular the sublimate wood wool bandage."
1884 On 6th May Paul Hartmann from Heidenheim in Württemberg is awarded German Patent No. 26903, entitled, "Production of a material for bandages".
1886 On 13th May the firm of Anthon & Söhne from Flensburg is awarded German Patent No. 35166, entitled "Machine for the production of wood wool".
On 15th June the firm of Deutsch-Amerikanische Maschinenfabrik Kirchner & Co. from Leipzig is
awarded German Patent No. 35654 entitled, "Procedure for forward and reverse planing on wood wool
planing machines".
1887 On 6th January the firm of C. L. P. Fleck Söhne from Berlin is awarded German Patent No. 38040 entitled "Planing machine for the production of wood wool".
14 Raw material wood wool | data | facts | markets | 1. November 2012
Wood wool | Chronological table
1908 On 1st December Robert Scherer is awarded Austrian Patent No. 37223 for his magnesite -bound wood
wool slabs.
1914 On 14the July the textile industrialist, Guido Franz Rotter [1860-1940] is awarded Austrian Patent No. 65572, entitled "Procedure for the manufacture of yarn" [from wood wool].
1924 The Austro-American firm of Magnesit AG in Ferndorf in Carinthia commences industrial production of
wood wool slabs.
1925 On 13th May Charles Tellenbach from Buttes in the Canton of Neuenburg is awarded Swiss Patent No. 111828, entitled "Procedure for wood turning" for his wood wool machine.
1955 The wood wool manufacturer, Karl Friedrich Lindner [1908-1966] from Toggenburg exploits the by then
almost forgotten antiseptic properties of wood. At the instigation of dairy farmers in the region in trials
lasting years he developed an additive-free, dry material for cleaning udders - what is known as "udder
wool". This is particularly fine wood wool, which is produced from conifers in a mechanical process,
which protects the raw material and is unique in the world. Nowadays this product is exported to more
than eighteen countries.
1991 On 21st May 1991 the American wood wool Standard PPP- E-91 1, introduced on 28th September 1973, was definitively repealed.
2001 In May 2001 the European Standard EN 13168 for wood wool slabs entered into force.
2004 The DIN Standard 4077 for wood wool dating from 1942 was definitively repealed.
Raw material wood wool | data | facts | markets | 1. November 2012 15
W oo
d w
oo lfa
ct or
Wood raw materials | Overview
Author | Hanspeter Frey | Information date | 1. November 2012
Raw material wood wool Data | facts | markets
Food Logistics Erosion protection mats
Evaporative coolers Udder hygiene
© 2012 by Hanspeter Frey | 9620 Lichtensteig | Schweiz | [email protected] The copying and distribution of this pdf. document is expressly permitted, in particular for training purposes.
Raw material wood wool | data | facts | markets | 1. November 2012 3
Roundwoodofthehighestquality nowastewood freefrom additives
[alsofreefromwoodpreservatives] freefrombindingagents chippingtechniqueprotects woodfibres problem-freedisposalofwaste
Wood wool | Definition
Wood wool is a multi-functional raw material produced mechanically by wood
wool machines in the form of fine, elastic, almost dust free wood wool fibres, up
to 500 mm long and free from wood splinters. It is produced from debarked
hardwoods and softwoods of the highest quality classifications [FSC and PEFC
certified], which - depending on use - is air-dried to up to 13 % wood moisture.
In Switzerland wood wool is produced in conformity with the Swiss Wood
Wool Standard, which came in force on 1st June 2011.
However, before this wood raw material, which originally came from the USA,
appeared in Europe in the 1880's the expression, "wood wool" had , however,
already been used for two quite different products.
At the International Exhibition in Paris in 1885 the French architect and
decorator Edouard Guichard [1815-1889] exhibited his "jaine de bois" [wood
wool] as a cost-effective substitute for shavings of flocking for the
production of wallpapers. These were very thin wood shavings boiled in
soapy water
In 1883 the surgeon, Gustav Adolf Walcher [1856-1935] described in his
thesis how he had produced anti-septic bandages from wood fibres, which
he called sublimate wood wool bandages.
4 Raw material wood wool | data | facts | markets | 1. November 2012
Wood wool | Definition
Raw material wood wool | data | facts | markets | 1. November 2012 5
loosely networked
loose
bound
usually also contains waste wood
6 Raw material wood wool | data | facts | markets | 1. November 2012
Source|proHolz
Wood | Properties
Wood can be quite generally divided into chemical, physical and biological properties. These
are fully used in the production of the multi-functional wood raw material, "wood wool".
In order properly to use wood and wood raw materials, it is necessary to understand the advantages and
disadvantages connected with the properties of wood, in order to be able to advocate the use of wood as a
modern construction and raw material. As well as using the properties of wood, however, the wood must
be handled and processed, as well as being used sensibly in processes that complement each other, in
order to make use of the strength of wood.
Arguments for wood
Natural durability
Good bonding with other raw materials
Good thermal properties, can be used not merely as a fuel
Wood moisture Wood is a hydroscopic, inhomogeneous and anisotropic raw material:
Hydroscopic - absorbs or emits water vapour from the environment.
Inhomogeneous - there is no equivalent constructed raw material. It is unique in its three anatomical
directions of cutting and each species of timber has its individual structure.
Anisotropic - in its three cutting directions (longitudinal, radial and tangential) wood possesses
different properties (e.g. shrinkage and swelling, strengths, thermal conductivity, etc.)
In changing climatic conditions (temperature and relative humidity) the moisture content of wood alters. In
a damp climate dry wood absorbs moisture and in a dry climate wood emits water. In both cases a steady
state is ultimately reached, which is designated as the equilibrium moisture of wood.
Biological properties
Wood is biodegradable, and is, however, therefore also susceptible to biotic pests For example, it can be
attacked by insects, fungi or bacteria and its substance can be destroyed with long-lasting effects. At wood
moisture of 15 % wood is vulnerable to attack by fungi.
Anisotropy The properties of wood can be divided into the three anatomical basic directions of the wood (axial, radial,
and tangential). This leads to unequal shrinkage of the wood when it dries out. In Central European
species of timber the maximum amount of shrinkage in the centre is axially 0.3 %, radially 5 % and
tangentially 10 %. Thus, when it dries out wood shrinks about twice as much tangentially (parallel to the
annual growth rings) as radially (parallel to the wood rays), so that particularly in large-dimensioned timber
slight radial cracks appear. The swelling / shrinkage coefficient gives the size alteration per cent of
alteration in wood moisture.
Raw material wood wool | data | facts | markets | 1. November 2012 7
Production Chipping of the round wood to produce wood wool in
accordance with the wood wool formula involves among
other things the selection of the species of tree and its
dimensions [length, thickness and breadth].
End product
Raw material Round wood of the highest quality from certified
hardwood and softwood storage [air-dried].
Wood wool formula For every use the individual wood wool mix is calculated
on the basis of the data provided by the user. For it is
only in this way that the varied biological, chemical and
physical properties of the different tree species can be
used to the full.
8 Raw material wood wool | data | facts | markets | 1. November 2012
MULCH
Wood wool | Raw material circulation | Agriculture
RAW MATERIAL Round wood of the highest quality from certified hardwoods and softwoods
PRODUCTION Selection of the wood wool filaments - timber species and dimensions
Free from foreign matter and additives
First use Second use
MULCH loose wood wool and /or wood wool mats
UDDER HYGIENE loose special wood wool
VEGETABLES | FRUIT | CROPS loose wood wool and / or wood wool mats
UDDER HYGIENE
Waste disposal Problem-free ecological waste disposal via second use
Raw material wood wool | data | facts | markets | 1. November 2012 9
Wood wool | Uses
Its "invisibility" is testimony to the quality of wood wool. What at first seems to be
an objection becomes logical once you have examined it closely. Wood wool has
been and is used where its proven unique biological, chemical and physical
properties show to advantage. For healthy wood is a sustainable raw material
with a convincing life cycle assessment. In addition, cost benefit considerations
have played and play a decisive role in the use of wood wool, whenever
resourceful, innovative entrepreneurs have developed new products and
solutions for problems and have brought them and bring them on to the market.
From the very beginning these people have been successful in business, with
the motto, “wood wool is everywhere - from birth to the final step". Since the mid-
19th century this has been proved to be tried and tested in hundreds of ideas
and products. Nowadays loose wood wool is used in the following sectors and
products:
CONSTRUCTION
SPORTS EQUIPMENT
10 Raw material wood wool | data | facts | markets | 1. November 2012
Wood wool | Uses
ANIMAL HUSBANDRY
FILTER TECHNOLOGY
EVAPORATIVE COOLERS
VARIOUS
KINDLING
TAXIDERMY
Raw material wood wool | data | facts | markets | 1. November 2012 11
Wood wool machines
Wood wool machines are planing machines, which have been especially
developed to produce fine, elastic, almost dust free, loose, untreated wood wool
fibres, up to 500 mm long and free from wood splinters.
In 1842 William Baker from Utica in New York State in the USA obtained US
Patent No. 2654 for his wood wool machine, entitled "Machine for manufacturing
wood so as to be used as a substitute for curled hair in stuffing beds". Nine
years later Edwin K. Browning's US Patent No. 8217 bore the title, "Machine for
cutting wood into shreds and crimping them for mattress stuffing, &c."
"Machine for manufacturing wood so as to be used as a substitute for curled hair in stuffing beds" by William Baker from Utica New York State in the USA from 1842 [Illustration from the patent specification]
12 Raw material wood wool | data | facts | markets | 1. November 2012
Quadruple-acting wood wool
SöhneinFlensburg
Wood wool machines That wood wool became an increasingly important, even essential raw material
from the mid-19th century first of all in North America and belatedly in Europe
proves the constantly growing supply of wood wool machines as well as machines
designed to process the wood wool efficiently into products of all sorts. The ideas
and claims of the wood wool producers and wood wool users drove the machine
engineers to a frenzy of development of increasingly high-performance wood
processing machines, which they proudly presented at industrial exhibitions and
sold in huge quantities. This was the pattern not only for the many patents, but also
most notably for the lavish and costly product catalogues of the American wood
processing machine industry. With these machines it was possible to earn good
money.
The triumphal progress of wood wool in the USA awakened the interest of
creative minds in Europe as well. These people were not willing to surrender the
obviously lucrative business of industrial wood processing to the Americans without
a struggle. The pre-requisites for almost certain commercial success had been
recognised, and the basic raw material - the forest - lay almost at the front door in
every region of the Old Continent. For the German Empire, Austro-Hungary,
France, Great Britain and Switzerland were ideal production and sales areas.
Together with Johann Anthon, who founded an iron foundry and machine
factory for the production of wool processing machines in 1865 in Flensburg, Ernst
Kirchner [1853-1930] was from the start one of the most successful producers of
wood wool machines in Europe. The former locksmith's apprentice from Kotteritz
near Altenburg in Thuringia became inspired when he visited the USA on several
occasions as a sales representative for a Chemnitz machine tool manufacturer. It
was his visit to the World Exhibition in Philadelphia in 1876 which prompted his
decision to produce these wood processing machines, which were hardly known in
Europe, on his own account in Germany and to sell them all over the world.
Raw material wood wool | data | facts | markets | 1. November 2012 13
Wood wool | Chronological table
1805 On 13th August John Matthews from Philadelphia is awarded US Patent No. 633X, entitled "Machine for
grinding and sawing dye woods" for the first "excelsior machine".
1842 On 30th May William Baker [1795-1871] from Utica in the US Federal State of New York is awarded US Patent No. 2654, entitled "Machine for manufacturing wood so as to be used as a substitute for curled hair in stuffing beds" [wood wool machine].
1843 Friedrich Gottlob Keller [1816-1895] from Hainichen in Saxony invents the process for producing paper from groundwood pulp.
1855 At the World Exhibition in Paris the French architect and decorator, Edouard Guichard [1815-1889] exhibits his "jaine de bois" [wood wool] as a cost-effective substitute for shavings of flocking for the production of wallpapers.
1868 Friedrich Voith [1840-1913], the entrepreneur from Heidenheim submits his first patent for a wood grinder with a toothed loading rack.
1873 At the Centennial International Exhibition of Arts, Manufactures and Products of the Soil and Mines in Philadelphia in the USA the American wood wool machines excited huge interest amongst the many German visitors.
1883 Gustav Adolf Walcher [1856-1935] took his PH.D. at the University of Tübingen with the thesis,
"Concerning the use of lignin as antiseptic bandaging, in particular the sublimate wood wool bandage."
1884 On 6th May Paul Hartmann from Heidenheim in Württemberg is awarded German Patent No. 26903, entitled, "Production of a material for bandages".
1886 On 13th May the firm of Anthon & Söhne from Flensburg is awarded German Patent No. 35166, entitled "Machine for the production of wood wool".
On 15th June the firm of Deutsch-Amerikanische Maschinenfabrik Kirchner & Co. from Leipzig is
awarded German Patent No. 35654 entitled, "Procedure for forward and reverse planing on wood wool
planing machines".
1887 On 6th January the firm of C. L. P. Fleck Söhne from Berlin is awarded German Patent No. 38040 entitled "Planing machine for the production of wood wool".
14 Raw material wood wool | data | facts | markets | 1. November 2012
Wood wool | Chronological table
1908 On 1st December Robert Scherer is awarded Austrian Patent No. 37223 for his magnesite -bound wood
wool slabs.
1914 On 14the July the textile industrialist, Guido Franz Rotter [1860-1940] is awarded Austrian Patent No. 65572, entitled "Procedure for the manufacture of yarn" [from wood wool].
1924 The Austro-American firm of Magnesit AG in Ferndorf in Carinthia commences industrial production of
wood wool slabs.
1925 On 13th May Charles Tellenbach from Buttes in the Canton of Neuenburg is awarded Swiss Patent No. 111828, entitled "Procedure for wood turning" for his wood wool machine.
1955 The wood wool manufacturer, Karl Friedrich Lindner [1908-1966] from Toggenburg exploits the by then
almost forgotten antiseptic properties of wood. At the instigation of dairy farmers in the region in trials
lasting years he developed an additive-free, dry material for cleaning udders - what is known as "udder
wool". This is particularly fine wood wool, which is produced from conifers in a mechanical process,
which protects the raw material and is unique in the world. Nowadays this product is exported to more
than eighteen countries.
1991 On 21st May 1991 the American wood wool Standard PPP- E-91 1, introduced on 28th September 1973, was definitively repealed.
2001 In May 2001 the European Standard EN 13168 for wood wool slabs entered into force.
2004 The DIN Standard 4077 for wood wool dating from 1942 was definitively repealed.
Raw material wood wool | data | facts | markets | 1. November 2012 15
W oo
d w
oo lfa
ct or
Wood raw materials | Overview
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