Comparison analysis.Above results s

Comparison analysis.
Above results show that the U.S. is more than 50% greater than China by
generation amount, but less than 20% by weight.
There are main 2 reasons which may result in
the discrepancy between the two countries.
First reason is the difference of vehicle types in
use. Possession of private vehicles in the U.S.
is relatively higher than those in
China. The generation amount of light duty tires scrap in the U.S.
is twice as many as that of tires scrap from passenger vehicles in China. While generation amount
of commercial tires from heavy trucks is only 40% of those in China. As the average weight of
commercial tires is more than 5 times of traditional light duty ties, total weights of scrap tires in
China is much higher than those in the U.S.
Second reason is the difference of tire retreading ratio. In 2009FY, amount of retreaded tires
in China is only 13 million units and retreading
ratio is less than 5%. For traditional passenger
vehicles, retreading ratio is 0%. While in developed countries, average retreading ratio is more than
45%[8]. In the U.S., retreading ratio is more than 95%, 15% for heavy-duty (truck ) tires and
passenger vehicles respectively.
Comparison of material flows
Material flow of scrap tires in China.
Markets are the most critical factor for material flow. In
China, as scrap tires can be used as raw materials,
they have been collected effectively in China.
However the reverse supply chain of scrap tires
has not been regulated and whole recycling
markets of scrap tires in China are chaotic. As a
result, informal sectors such as unorganized and
private sectors play ve
ry important roles.
Collector/recycler/trader pay mone
y to consumers for scrap tires.
The prices will vary greatly
depending on types of tires and fo
llowing possible recycling or di
sposal methods. Most of scrap
tires are traded freely in private.
Collection activities and material fl
ow of scrap trie
s lack necessary
supervision from relevant au
thorities and associations.
Currently, main recycling and di
sposal methods of scrap tires
include reclaimed rubber, rubber
powder and oil refinery. In 2010FY,
near 3 million tons scrap tires were used to produce reclaimed
rubber, less 0.4 million tons were used to pro
duce rubber powder, about 0.3 million tons were
disposed of by large-scaled
oil refinery enterprises.
Besides the above, illegal oil refinery is the ma
in disposal method. Total
weight of scrap tires
is more than 2 million tons very year. Accordi
ng to rough statistics, more than 700 illegal oil
refinery points were exposed by media fr
om 2006-2010FY. Although local governments have
adapted lots of measures to crack down illegal
oil refinery, this phenomenon still exists and has
caused social and media concern.
For reclaimed rubber, they have wide usage in rubber industry. For example, the lower quality
reclaimed rubber will be used as
raw materials of common rubber
products, such
as rubber pad,
shoes. The higher quality reclaimed rubber can be
used to produce bias tires, cycle tires and the
maximum mixing amount used can reach 50% of
total rubber consumption amount. The special
quality reclaimed rubber can replace a portion of natu
re rubber to produce truck
and bus radial tires.
For rubber powders, their potential
usages are very broad and
real consumption markets are
very limited except for preparing reclaimed rubber.
Nowadays, rubber powders mainly are used in
the field of sport grounds, construc
tion engineering. As Sep. 1st, 2011,
《
Ground vulcanized rubber
of scrap tires for highway engineering (JT/J 797-2011)
》
，
《
Asphalt rubber for highway engineering
(
（
JT/T 798-2011)
》
have been implemented, transport industry
have explored an effective route for