Synthetic resins or natural rubbers -- part of the class 520 ser – Synthetic resins – Process of treating scrap or waste product containing solid...
Reexamination Certificate
1999-04-28
2001-12-11
Truong, Duc (Department: 1773)
Synthetic resins or natural rubbers -- part of the class 520 ser
Synthetic resins
Process of treating scrap or waste product containing solid...
C521S045500, C521S134000, C428S489000
Reexamination Certificate
active
06329437
ABSTRACT:
BACKGROUND OF THE INVENTION
1. Field of the Invention
The present invention relates to improved building materials made from recycled plastic waste materials and/or freshly or newly produced plastic materials for the construction or building industry, and also to building components or elements made using the improved building materials and also to methods of making a building material from recycled plastic waste materials and/or freshly or newly produced plastic materials for a particular application with special properties.
2. Prior Art
Especially since building materials are now increasingly required to be environmentally friendly, building materials that comply with different legal requirements must be used in the building industry. These materials may include newly or freshly produced plastic materials, as well as of recycled plastic materials, which are made from plastic waste. It is also important that the waste that is produced during construction is environmentally friendly and can be reused. In addition, demolition material that comes into existence from the above-mentioned building materials should be both environmentally friendly and reusable for redevelopment.
Currently, only partial solutions or individual building materials could be developed that satisfy these requirements. The currently used building materials, which are used, for example, as balance material, insulation material and sound absorbing material, as well as for the production of building elements and buildings, are expensive in their production and treatment and only a small percentage of these materials are reusable.
There are several other disadvantages of current building materials, such as balance materials, barrier materials and insulation materials, used for construction of building elements and buildings. They often consist of a mineral or chemical raw material, that requires considerable engineering effort to prepare, break down or dispose of, and that is expensive to make. In addition, these building materials burden the environment when the building is renovated or demolished. Also of importance is the fact that the demolition material causes additional expenses during the waste disposal or recycling.
There are even more disadvantages. Current building materials are not always pourable, are often not in accordance with the required fire codes and are not always waterproof or weatherproof. In addition, they are often provided with unhealthy binders and they have to be adjusted to fit the required geometrical dimensions.
According to the state of the art building materials made of plastic material are freshly or newly produced from raw materials for each individual application. For example, German patent, DE 42 02 431 C2 describes a method and apparatus for making a lightweight aggregate material with a comparatively hard surface for plaster, concrete, mineral or plastic bonded insulating panels as well as insulating material for filling, in which expanded polystyrene is comminuted, fractionated and heated or treated thermally. This process is expensive, the material is combustible and not universally usable and plastic waste from it cannot be used for construction.
In addition, the Swiss patent CH 622,049 describes a granulated material for use as a filler for drainage packing, which consists of a core of a higher specific gravity than its outer surface layer or jacket. The production and engineering costs for this granulated material are high. It is not possible to use it in all for construction engineering applications above and under the earth. Besides, it is not possible to produce it out of waste plastics and it is difficult to recycle.
In the German patent DE-G 94 00 024.7 building materials, such as concrete, mortar, flooring plaster and fillers, are described in which a granulate made of plastic material is used as an added aggregate. This granulate can be made from waste plastics by milling and then again extruding. This method requires a lot of energy and is also very expensive. This granulate can only be used in concrete and mortar, and the fabrication of building components or buildings from this material is not possible.
SUMMARY OF THE INVENTION
It is an object of the present invention to provide a universal building material for construction engineering made from recycled plastic waste material and/or freshly or newly made plastic material containing any plastic compounds, which has thermal insulation properties and sound absorption properties and is environmentally friendly and does not cause any health problems.
It is also an object of the present invention to provide a universal building material for construction engineering made from recycled plastic waste material and/or freshly or newly made plastic material containing any plastic compounds, which may be mixed and combine with other standard building materials, such as cement and plaster, and raw materials.
It is a further object of the present invention to provide a universal building material for construction engineering made from recycled plastic waste material and/or freshly or newly made plastic material containing any plastic compounds, which is not easily inflammable, has a very good heat transfer and insulation properties, is waterproof and weatherproof, and it is very easy to work with it.
It is an additional object of the present invention to provide a universal building material for construction engineering made from recycled plastic waste material and/or freshly or newly made plastic material containing any plastic compounds, which produces a waste material when worked or used which can always be reused, and is financially and economically low in cost, conserves resources and complies with the legal requirements for a building material.
It is another object of the present invention to provide a method of making a building material for a particular application from plastic waste materials and/or newly made plastic materials by adjusting the amounts and volume percentages of the various plastic materials to obtain a building material with special or improved properties.
It is another object of the present invention to provide building components or elements, such as floor sections, roadway sections and bridge components, used in the construction industry from a building material containing recycled plastic waste materials and/or newly made or fresh plastic materials that provide sound absorption, thermal insulation, water resistance, weather resistance and/or fire retardant properties.
According to the invention freshly or newly produced plastic materials and/or recycled plastic waste material containing any plastic compounds, for example PE (polyethylene), PVC (polyvinyl chloride), PP (polypropylene), PS(polystyrene), ABS(acrylonitrile butadiene styrene), are prepared in the usual way, preferably shredded, and are mixed in suitable amounts to form a universal building material for the building sector or construction engineering. This building material is used to produce new building elements or compounds and buildings having improved properties.
For particular applications that require a special building material with particular properties the volume proportions and amounts of the different recycled plastic waste materials and newly produced plastic materials are determined and adjusted according to the particular properties that are desired. It is important to note that the mixture ratios of the individual plastic materials, as well as of the recycled materials depend on the special properties desired, such as thermal insulation and sound absorption properties.
The building materials that are made from recycled plastic waste materials and/or newly made plastic materials can be mixed and combined universally with other building materials used as filling material to form a useful composite material.
The recycled plastic waste materials and/or newly made plastic materials can be processed in a special way for above ground construction to make a special fire resistant building material and building components.
Vincent Irvin G.
Weber Ralf D.
Striker Michael J.
Truong Duc
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