Ask anyone under 30 the question, "Where does rubber come from?" and you'll get a variety of answers, but not often the correct one. One young man recently asked us if it was from a whale. I think he was thinking blubber, not rubber!
List of things made of rubber:
car, truck, plane tyres,
rubber boots (gumboots)
The Story of Malaysian Natural Rubber
Dalsouple France, normally sources latex supply from the open
market but a large amount would originate from Malaysia.
I found this article and downloaded it from the internet as a freely
available non copyrighted media.
As far as I can ascertain it is quite accurate in it’s information.
Enjoy this educational transcript on how Dalsouple obtains the
material to produce perhaps the finest natural rubber flooring in the
world today- DalNaturel.
Natural rubber is extracted from rubber producing plants, most notably the tree Hevea brasiliensis, which originates from South America. Nowadays, more than 90% of all natural rubber comes from these trees in the rubber plantations of Indonesia, the Malay Peninsula and Sri Lanka. The common name for this type of rubber is Para rubber.
The rubber is extracted from the trees in the form of latex. The tree is ‘tapped’; that is, a diagonal incision is made in the bark of the tree and as the latex exudes from the cut it is collected in a small cup. The average annual yield is approximately 2 1⁄2 kg per tree or 450kg per hectare, although special high-yield trees can yield as much as 3000kg per hectare each year.
The gathered latex is strained, diluted with water, and treated with acid to cause the suspended rubber particles within the latex to coagulate. After being pressed between rollers to form thin sheets, the rubber is air (or smoke) dried and is then ready for shipment.
How the rubber industry began
Of all the wonderful tales brought back by Christopher Columbus in
1496 after his second voyage to the New World, none was
stranger than the tale of a ball, which bounced. The people of Haiti
made these playballs from the gum of a tree.
Although they did not realise it, Columbus and his crew were the
first Europeans to see this unique substance – rubber. It did not
get its name until much later – in 1770, an eminent English
chemist, Joseph Priestley, noted the ability of this substance to
‘rub out’ pencil marks, and ever since it has been called rubber in
the English language. This is curious, because ‘rubbing out’ has
never been an important use of rubber.
In spite of the interest it aroused very little use was made of the
new discovery. This was mainly because no one knew how to
prevent the rubber becoming sticky in summer and brittle in winter.
In the early nineteenth century, all this changed. In 1820, Thomas
Hancock, an Englishman invented a machine, which would soften,
mix and shape rubber. It was then possible to dissolve rubber and
start making useful products. By coating cloth with the rubber
solution it could be made waterproof; the first ‘Mackintosh’ was
made in 1823. Soon after there was another important discovery,
this time by an American. In 1839, Charles Goodyear found by
accident that raw rubber could be improved by heating it with
sulphur. The new material produced, called vulcanized rubber, was
no longer affected by changes in temperature.
As other inventors found uses for rubber the demand grew. Some
of the first products to be made from rubber were hose, conveyor
belts, flooring and footwear – these still use rubber today. In the
middle of the nineteenth century rubber came from South America,
where the hot wet climate suited the wild rubber tree, but it was
very difficult to collect it from the dense jungle. It soon became
obvious that more rubber would have to be grown elsewhere to
meet the demand.
In 1876, Sir Henry Wickham, at the request of the India Office,
collected and shipped from Brazil 70,000 seeds from the wild
rubber tree. These were rushed to Kew Gardens in London and
planted in specially prepared hot-houses. The small number, which
survived, were taken in 1877 to Ceylon and later to Malaysia and
other countries of South-east Asia.
The rubber tree quickly flourished in Malaysia; large areas of
jungle were cut down and planted with rubber trees. Henry
Nicholas Ridley, who was appointed Director of the Singapore
botanic gardens in 1888, was one of the pioneers of those times
and did perhaps more than anybody to encourage planting of this
By the end of the nineteenth century there were 2500 hectares of
rubber in Asia. Shortly afterwards Henry Ford started making his
famous motorcar and the demand for rubber – to make tyres –
rocketed. The trees in the South American jungle could not
possibly produce enough rubber and so the new plantations of
Asia found that the world wanted all the rubber they could produce,
and more. By 1910 there were ó million hectares of rubber planted
and the countries of Asia had now become the main suppliers of
With the spread of motoring to every country in the world, even
today’s enormous acreage of rubber (about 6 million hectares in
all) cannot supply enough. There is not enough natural rubber to
go around. Scientists have developed man-made rubbers from
petroleum. These are often mixed with natural rubber. For some
products, however, only natural rubber can be used.
More rubber from better trees
Peninsular Malaysia – comprising 12 of the 14 states in the
Malaysian federation – is among the world’s most important rubber
growing areas. Rubber is also grown in Sabah (formerly North
Borneo) and Sarawak, which, known together as East Malaysia
make up Malaysia.
Altogether Malaysia produces almost 20% of the world’s natural
rubber. A good deal of Malaysia’s rubber (over half) comes from
thousands of privately owned plots of land called small holdings,
which are usually about 2 hectares. The rest is grown on big
estates owned by various companies; each can cover over a
thousand hectares. Altogether, Malaysia has 1.7 million hectares
In recent years most of the older trees have been replaced by
newer varieties which yield up to ten times as much rubber, thanks
to scientific cross-breeding and careful cultivation.
If you were a rubber tapper you would have to get up very early in
the morning, as the rubber latex flows more easily before the heat
of the day begins. Latex is a milk-like fluid contained in tiny cells
situated beneath the outer bark of the rubber tree. The latex is
obtained from the tree by tapping that is cutting away a thin
shaving of the bark about 2 mm thick. This cut, which is made with
a special tapping knife, pierces the cells and the latex oozes slowly
out to a collecting cup placed below. The tapper needs great skill
with his knife as the tree is easily damaged if the bark is cut too
In two or three hours the flow of latex ceases. By the time the
tapper has cut his last tree for the day the latex collecting cup of
the first is ready to be emptied into a larger container. When all the
cups have been emptied the full containers are taken to the
factory, where the latex is turned into raw rubber.
Rubber trees are not tapped until about five years after planting; by
then they can produce enough rubber to make tapping worthwhile.
If you were working on your own smallholding you would probably
take your latex to a group processing centre to process the latex
into sheets or sell it to Mardec, a government agency which
processes rubber into technically specified form. The big estates
have their own machines. After processing it is sent to one of
Malaysia’s ports to be shipped overseas. Malaysian rubber goes to
every country in the world and is recognized to be the best.
Rubber in industry and the home
Rubber is elastic, flexible, airtight, watertight, long lasting and
insulating, to mention just a few of its properties. There are
thousands of products, which take advantage of these useful
properties. Some will be familiar to you, others less so because
many rubber products do their work unseen.
Most of the world’s rubber is used in tyres, ever since John Boyd
Dunlop invented the pneumatic tyre in 1888. A tyre is not just a
hunk of rubber, it is skillfully designed to do its job and it is made,
not only of rubber, but also of other materials; fibres, steel and
various chemicals. Some tyres use man-made rubber but for the
toughest kinds of tyre only natural rubber will do. Aircraft tyres are
a good example; these have to take tremendous punishment
during landings and take-offs. They get very hot, hotter than boiling
water, and natural rubber is always used to stand up to these
conditions. The same is true for giant lorry tyres. The tyres on your
family car have an easier life and they will have a lot of man- made
rubber in them but they will also use some natural rubber in those
parts of the tyre where it is needed.
As well as tyres, modern cars and lorries use a lot of rubber in
other ways. Engines are mounted on rubber to cut down vibration.
Some lorries and cars have rubber springs instead of steel ones.
Then there are radiator hoses, windscreen wiper blades, car mats,
seals and all sorts of small components such as bushes and
gaskets hidden away under the bonnet or in the suspension.
Many motorway bridges are mounted on large blocks of natural
rubber to allow the bridge to expand and contract when the
temperature goes up or down. Some buildings are now built on
similar rubber blocks to help stop vibration, particularly if they are
near railways. In this and many other ways rubber helps to make
life quieter and more comfortable.
Throughout the industry, rubber does all kinds of different jobs.
Hose to carry liquids; conveyor belts to carry coal, gravel, ores;
seals for machinery and so on. The list is endless.
In everyday life you make more use of rubber than you perhaps
realise. Did you know that the adhesive on transparent sticky tape
is made of rubber? More obvious, many sports balls are made of
rubber and the carpets and rugs in your home may have a foam
rubber backing underneath. Your shoes may have rubber soles,
and, if you travel on London’s underground, you may like to know
that the escalator handrail is made of rubber and the trains have
Methods Of Latex Rubber Tapping
All natural rubber originates in the Hevea tree, and it starts its
journey when the tree is tapped. Trees are rarely tapped more
often than once every two days.
A tapper starts the trek around the plantation before dawn. At each
tree a sharp knife is used to shave off the thinnest possible layer
from the intact section of bark. The cut must be neither too deep,
nor too thick. Either will reduce the productive life of the tree. This
starts the latex flowing, and the tapper leaves leaves a little cup
underneath the cut.
In ordinary circumstances, this latex will normally coagulate into a
lump in the bottom of the cup, called 'cup lump.' If the plantation
manager wants to make latex, then the tapper must add a
stabilising agent to the cup. Usually this is ammonia, which
prevents the latex from coagulating.
The tapper returns a few hours later and collects the stuff in the
cup -- either cup lump or latex. The double round trip usually
finishes at about 2 pm.
FYI (for your information) , the tapper is very often at the bottom of
the educational scale. Many are women; illiteracy is high; pay is
low. Child care and education is rudimentary at best. Living
conditions are quite primitive and latex allergy awareness is
Processing Of Latex - Cup Lump or Liquid Concentrate
If solid rubber is required, the cup lump, together with tree lace (the
remnants of the latex flow from the cut down to the cup) and other
bits and pieces are collected together and processed. That
processing involves quite a lot of heat, which destroys many (but
not necessarily all) of the proteins. It ends up as solid rubber.
Depending on the method of processing and the final purity of the
material, the industry refers to it either as TSR (technically
specified rubber), or sometimes sheet rubber.
When latex is required--which covers about 10 percent of all NR
produced--the material is gathered on the tapper's return journey,
poured into containers and delivered to a processing station where
it is strained and concentrated. At no stage in the process is the
latex heated. This means most of the proteins remain in the latex.
More stabiliser is added and the latex goes into a centrifuge to
remove some of the water, and increase the rubber content of the
latex. After centrifuging, the material is known as latex
concentrate, and contains roughly 60 percent solid rubber and 40
percent other stuff (water, proteins etc.).
This (latex concentrate) is what is used in the dipping process
when making gloves.