Synthetic resins or natural rubbers -- part of the class 520 ser – Synthetic resins – Processes of preparing a desired or intentional composition...
Reexamination Certificate
2000-06-15
2001-11-06
Sanders, Kriellion A. (Department: 1714)
Synthetic resins or natural rubbers -- part of the class 520 ser
Synthetic resins
Processes of preparing a desired or intentional composition...
C524S047000
Reexamination Certificate
active
06313195
ABSTRACT:
BACKGROUND OF THE INVENTION
1. Field of the Invention
The present invention relates to a naturally disintegratable cushion material and the process for making the material. The cushion material is easy to be fabricated, non-toxic and environmental friendly because of being made from natural organic materials, which can replace the traditional styrofoam or corrugated papers.
2. Related Art
It has been known by people to use cushion materials in packaging goods in order to prevent the goods from being damaged during transportation. A cushion material mostly used in the earlier time is styrofoam which has the disadvantages of being difficult to disintegrate, unsuitable to be burned out and harmful to the environment if being buried in the ground. Therefore, under the situation of increasing awareness of environmental protection around the world, styrofoam material is gradually replaced by paper materials such as corrugated papers or other paper products. When the cushion materials are unused anymore and discarded, they have to be burned out or buried. It costs much energy to burn out the disposed materials under high temperature in a burning oven, while it requires a large space of ground and takes a long time to bury and disintegrate the disposed materials. Therefore, the burning and burying methods have their defects.
Also, the paper materials made from trees require planting the trees with a long time. Felling the trees results in an ecological imbalance, and the paper materials use lots of raw materials of wood which are complicated and costly.
SUMMARY OF THE INVENTION
The primary objective of the present invention is thus to provide a cushion material which can be disintegrated naturally into an organic manure. The cushion material is made from grain shells, added with non-toxic and disintegratable binders, fillers and softeners. So that, the cushion material can be disintegrated into an organic manure in the nature environment without needs of burning or burying. It is environmental friendly and highly practical.
Another objective of the present invention is to provide a method for making a disintegratable cushion material.
According to the present invention, the process for making a disintegratable cushion material includes the following steps. Mixing uniformly the main material powder ground from grain shells; fillers, such as calcium carbonate (CaCO
3
); and binders, such as polyvinyl alcohol (PVA) in suitable percentages. Adding the mixture with boric acid (HBO
3
), wax and softeners, such as trimethylolpropane (TMP), polyethylene glycol or glycerine. Harmonizing and binding the aforesaid materials with water into a moldable mixture, then extruding the mixture by an extruder. Meanwhile, vaporizing the water in the mixture by heating the mixture in the extruder with a temperature around 110 to 120 centigrade degrees so a to make it foams into a light weight, high strength and environmental protective cushion material.
The main material used in the present invention is taken from grain shells. Since the grain shells are great in quantity as they are taken from the great amount of grains, and are usually wastes or very low in price even being usable for some other applications, they are very easy to be obtained. On the contrary, the prior arts of so-called environmental protective materials are made from woods or papers. Since they are not easy to be obtained as we have to plant and fell the trees, they are more expensive than the material for the present invention. Moreover, excessive felling of trees has made forests less and less in the earth, which results in an ecological imbalance, higher production cost, and even causes problems in soil retention of earth.
The objectives and advantages of the present invention will become apparent from a detailed description provided below, with reference to the accompanying drawings.
Further scope of the applicability of the present invention will become apparent from the detailed description given hereinafter. However, it should be understood that the detailed description and specific examples, while indicating preferred: embodiments of the invention, are given by way of illustration only, since various changes and modifications within the spirit and scope of the invention will become apparent to those skilled in the art from this detailed description.
REFERENCES:
patent: 6025417 (2000-02-01), Willett et al.
Birch & Stewart Kolasch & Birch, LLP
Chun-Huei Chen
Sanders Kriellion A.
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