Special receptacle or package – With specified material for container or content – For container
Patent
1994-11-28
1996-09-24
Fidei, David T.
Special receptacle or package
With specified material for container or content
For container
206219, 206205, B65D 8584
Patent
active
055582281
DESCRIPTION:
BRIEF SUMMARY
CROSS-REFERENCE TO RELATED APPLICATION
This application is a continuation under 35 U.S.C. 371 of international application PCT/US93/04612, with an international filing date of May 20, 1993, and international priority based on U.S. application Ser. No. 07/891,382, filed May 29, 1992, now abandoned.
BACKGROUND OF THE INVENTION
The present invention relates to the use of water-soluble polymer packaging for crop protection chemicals.
The concept of delivering a single agricultural chemical in a water-soluble polymer is addressed in U.S. Pat. No. 3,299,506 and British Patent 2,095,558. Each of these patents disclose a water-soluble polymer containing a uniformly dispersed chemical. The water-soluble polymer containing a chemical is formed into a thin film which can be torn or cut into measured sections for delivery of the chemical contained in the water-soluble polymer. The chemical is applied by placing the film on the ground or by adding the film to a predetermined amount of water in a sprayer. By these methods, the user is able to avoid contact with the chemical.
It is often advantageous, however, to spray a field or garden plot with more than one chemical at the same time. For example, one chemical would kill broadleafed weeds while another chemical would kill grassy weeds.
The problem of delivering incompatible crop protection chemicals has in the past been solved by delivering the chemicals in separate containers. Another solution has been the "twin pack" container which has two compartments for containing while physically separting two incompatible chemicals which are to be delivered simultaneously. These containers have the disadvantage that the container(s) must be rinsed and then subjected to disposal.
SUMMARY OF THE INVENTION
The present invention provides packaging for simultaneous delivery of incompatible crop protection chemicals to a field or garden plot. For purposes of this invention, incompatible chemicals are those which when placed in contact with each other will cause one or both of the chemicals to decompose.
The present invention takes advantage of the unique ability of a water-soluble polymeric film to encapsulate and immobilize a chemical, to provide a means for simultaneously delivering incompatible chemicals. The container for the incompatible chemicals is the water-soluble film. Since the container is water-soluble, there is no need for rinsing and disposal.
The present invention provides packaging for storing and releasing incompatible crop protection chemicals, comprising: chemicals being incompatible with respect to each other; and encapsulated in said film and said second chemical being contained in said container; whereby upon solution of said film in water, said film and said container releases said first and second chemicals, respectively.
Another embodiment of the present invention is packaging for storing and releasing incompatible crop protection chemicals, comprising a plurality of water-soluble films laminated to one another, a first crop protection chemical being encapsulated in at least one of said films, and a second crop protection chemical incompatible with said first chemical being encapsulated in at least one other of said films so as to be stored separate from said first chemical, whereby upon solution of said films in water, said first and second chemicals are released into said water.
DESCRIPTION OF THE DRAWINGS
FIG. 1 shows a front view of one embodiment of packaging of the present invention with one film side of the packaging being peeled back to show the presence of crop protection chemical in the package.
FIG. 2 shows a cross-sectional side view of the packaging of FIG. 1 with the thickness of the film forming the packaging being enlarged for the purpose of clarity.
FIG. 3 shows an enlarged cross-section of the film of the packaging of FIG. 2, indicating the presence of crop protection chemical dispersed therein.
FIG. 4 shows an enlarged cross-section of another embodiment of packaging of the present invention.
FIG. 5 shows an enlarged cross-sectio
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Jackisch David A.
Styles David A.
E.I. Du Pont de Nemours and Company
Fidei David T.
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