Developing Trend for Plastic and Plastic Mold
1 Plastic industry
Since the reform and open policy，the plastic processing industry in our country has developed rapidly in the speed of 10% annual average，it is 3 to 5 percentage points high- -er compared to the speeding up average of GDP．At present，our country has marched into the world plastic great nation ranks，the annual output of plastic products has been the second of the world，and has formed the class complete industry system．
Along with the unceasing expanding of the application area for plastic products，the production of plastic products in the world in the future 10 years will increase in the speed of 3% per year，the total capacity of plastic products in the world in 2010 will be up to 186 million tons． The greater demand for plastic products in our country will be kept on，the production of plastic products will increase in the speed of 10% per year．And it is estimated that，the total capacity of plastic product in our country will approach to 40 million tons in 2010.
The development key of plastic industry in the future in our country is in the aspect of plastic product in industry，traffic and engineering，the packing plastic products，building plastic products，agricultural plastic products and the water saving plastic pro- -ducts etc．
1.1 Plastic products in industry，traffic and engineering
Engineering plastic is the category that developed quickest in the plastic industry at present．Along with the fast development of the economy in our country，its application scope and quantity has increased unceasingly. The products in this scope include the plas- -tics used in traffic and carrying trade as well as the engineering plastics used in electron- -ic，electrical appliance and information industry etc．In 2005，the total demand of engi- -neering plastic products in our country was approximately 4.5 million tons；in 2010，the demand of plastic only for automobile will be up to 1 million tons.
1.2 Plastic products in packing
Plastic has the excellent characteristics，and the packing field is the biggest field，the plastic to be used. The statistic indicates that，plastics used in packing in each country are equally to 35%.In 2003，the plastic product outputs used in packing in our country was 4.65 million tons ,account for 28.1% of the total output of plastic product，the production value amounted to 68 billion Yuan，it grew 14.2% compared with 2001。It is estimated that, the growth rate of annual average for packing plastic product in our country before 2010 is 12%.
1.3 Plastic products in building
Plastic building material is the new building material of emerging 4th generation，mainly including the plastic tube，plastic doors and windows，building waterproof mate- -rial，heat-insulated material and decorative material etc，the use is extremely broad in construction works，municipal engineering，village and small town construction as well as the industry construction．The plastic building materials not only can substitute for the traditional building materials such as lumber，steels and so on，but also has many superiorities，such as energy saving and material saving，environment protection，improving
2 living environment，enhancing construction function and quality，reducing building deadweight，easy for constructing and so on．Building industry is the national economy pillar industry，the building industry of our country will be able to have a greater develop- -ment in the next 5—15 years．
1.4 Plastic products used in agriculture and plastic water saving equipment
As a result of the widespread application of agricultural ground mulching membrane and coting membrane，the rapid promotion of agricultural high efficiency water saving irrigation engineering as well as the scaled development of the related professions such as fishery，animal husbandry and forestry etc，the agriculture has become the 2nd big exp- -ense domain of plastic products that is only inferior to the packing profession．The huge potential of agricultural plastic market has provided a wider development space for the development of plastic industry．The overall area of ground mulching membrane in the whole country is 170 million Chinese areas，again adding the ammoniate membrane，ensilage membrane，membrane used for forage grass in the twine membrane，plastic grow seedlings vessel，sun visor net，fishing net，materials used for agricultural products to store and maintain freshness，pesticide appliance，foam plastic plate and so on，the agr- -icultural plastic product needed in the whole country is approximately 3 million tons. Along with the persistent and fast development of the social economy in our country， the fresh water resources is more and more deficient，the plastic water saving equipment will have a huge developing space．
1.5 Plastic products used in commodity and medicine
Along with the unceasing enhancement of people’s living level，the amount of plas- -tic products needed in each daily life will be increased unceasingly；the everyday use products still have a tremendous potential market．Medical plastic product is the product that the technical content and attachment value is highest in the plastic industry，now it is growing in a speed of 15% yearly average．But the production value of medical plastic product in our country only accounts for 2%～3% of the medical plastic product produc- -tion value in the world，the average consumption for per person is not up to 5% of the developed country．Therefore，the market prospect of medical plastic product in our country is extremely broad．
2 Mold industry
Because of the powerful drawing of market demands， mold industry has developed in high speed，the market is broad，the production and marketing are both prosperous．In the recent three year，the yearly average rate of mold industry in our country is 21%. The production value in 2003 exceeded 45 billion Yuan。 It was approximately equal to 5 billion above US dollars，occupied the 3rd in the world．The forecast of the experts in the industry is that，the plastic mold in our country will still increase in the speed of above 15% yearly average rate in the next 10 years and even a longer term．At the same time，the exportation of mold also has a wide developing prospect．
For the next period of time，the demand for mold will be mainly in 4 professions：the automobile profession，home appliances profession, electronic and communication profession and building materials profession．As for the automobile profession，now the output of automobile in our country exceeds 4 million，the basic vehicle type has been up to 170 kinds，the new type vehicle and the refitted type vehicle will be up to 430 kinds，there are approximately 80% molds which need to be replaced when the type of vehicle to be changed，one model automobile will need thousands of molds，it worth’s one hundred million Yuan；In home appliances profession，the color TV，refrigerator，washer，air-conditioner，microwave oven， video tape recorder，vidicon，VCD and DVD etc are mostly combined by the plastic and rubber product fittings，thus it needs quite a lot of molds．
The plastic processing industry and the mold manufacturing industry taking as the sunrise industry，the technology of processing and manufacturing will be changing with each new day．Along with the unceasing development and application of the modified plastic，mill micron plastic and special engineering plastics，as well as the information technology fast developing must bringing the high accuracy，the high complex degree，the high uniformity and the high production with low consumption，the plastic processing industry and the mold manufacturing industry will certainly become one of the industries which have the most deve1oping future in the 21th century
Flat Running Tire
This new utility model is a flat running tire which is related to the automobile fittings field．It is mainly designed for the existing automobile to be in wrong direction after the tire is blowout and the insecurity factor of the latter vehicle follows．The design feature is that there should provide with at least four air piston assemblies in the rubber tire．The described air pressure piston assembly includes cylinder, piston, backplane, connecting screw , supporting plate，positioning screw，valve of air piston assembly and bladder．The valve of air piston assembly is linked to the bladder through the cylinder，the back plane is mounted on the wheel hub，the backplanes is fixing connected with each other by connecting screw，the bottom of cylinder is fixed on the backplane，the suppor- -ting plate is fixing connected with the piston；the piston is dynamically linked with the cylinder body and at the connecting position between the two is set with the positioning bolt，the bladder is set inside the cylinder．This new utility model solves the technical problems of the insecurity factor that the vehicle is in wrong direction after the tire is blowout and the latter vehicle follows，and the design is rationa1. It will play extremely important role to eliminate the unsafe traffic incidents．
Belt Ply of All Steel Radial Truck Tire
This utility model is a belt ply of all steel radial truck tire which is related to autom- -obile tire．it is specifically a belt ply of radial tire．According to the design plan that this new utility model is provided，the belt ply of all steel radial truck tire includes rubber and a number of core sections which is inside the rubber．The feature of this utility model is：the core sections of the belt ply are made up by a single thread in the middle and 6 single threads equably surrounded the single thread．The density of the core sections in the rubber is 62 threads for each 10cm．A number of core sections in the rubber makes up of the cord．By this utility model，the processing technology can be simplified，the 4 production costs will be reduced and the service life would be extended．
A Safe Tire
This utility model is related to a kind of safe tire．It includes the carcass and the valve which is inside the carcass．There into，there is the inside and outside air chambers which are separated by the separating ring wall between the inner and outer ring walls of the carcass．The above mentioned valve is connected with the inside and outside air chambers．This utility model provides a kind of safe tire which improves the running safety of vehicle，so that the accidents of tire flying off caused by the outer ring wall of carcass be punctured or the tire be suddenly blowout during the vehicle is in driving could be avoided，and the sudden traffic accident can be reduced．
Steel Braided Hose inner Mold
This utility model is related to a steel braided hose inner mold．The feature of it is that the inner mold is a solid cylinder, its core is made of flexible steel cord framework，and the outer layer of the framework is soft rubber layer. This utility model has the same advantages that the size of hose inside diameter is adjustable and the quality of product can be guaranteed．At the same time，due to the inner mold has flexible. So the length of steel braided hose is no longer limited by equipment and plant．The leftover material is effectively reduced，and the production cost and energy consumption of steel braided hose has also been reduced effectively．
