Hydrocapsule® Technology

HC---Large-BlueThe polymeric coating or outer shell/membrane of a HYDROCAPSULE® is made up of a specific composition of chemical compounds. Any unique liquid mixture of chemical compounds combined in specific ratio to make-up a HYDROCAPSULE® coating with specific properties is called a “FORMULATION”. There are many HYDROCAPSULE® FORMULATIONS, each having unique physical and chemical properties, and all are proprietary Hydrocapsule company Trade-Secrets. Each FORMULATION has its own code number.The acronym “HEM” stands for HYDROCAPSULE® Encapsulation Machine, and refers to any machine, device or mechanical process that makes HYDROCAPSULE®.

The methods, materials, chemical processes and machine hardware used to produce HYDROCAPSULE® are Patented U.S. Patent ( No. 6,780,507) and is solely owned by Hydrocapsule Inc.

The term “HYDROCAPSULE®”, is a U.S. Registered Trademark (Reg. No. 2,468,415), solely owned by Hydrocapsule Inc. It is defined as a discrete capsule(s) or microcapsule(s), of any size, shape, composition and color, which has a polymeric outer coating (shell or membrane) that surrounds any inner liquid mixture having 10% to 100% water content. The capsules are typically round, but can be any shape, and range in size from 100 microns to 2 centimeters in diameter, and are typically between 2 to 3 millimeters.

Possible Fields-of-Use

  • Encapsulation of insect diets (any nutritional supplement including water)
  • Encapsulation of nutritional supplements for any animal species.
  • Encapsulation of chemical-based pesticides or herbicides of any type.
  • Encapsulation of bio-pesticides (non-chemical) or pathogens for any animal.
  • Encapsulation of any living organisms (protozoa, cell, bacteria, virus,…)
  • Pharmaceutical or Veterinary applications such as vaccines or medicines.
  • Encapsulation and controlled release of semiochemicals and fragrances

Properties of HYDROCAPSULES®

  • HYDROCAPSULES® are “rainproof” since they are designed to contain.
  • HYDROCAPSULES® can be used to encapsulate aqueous solutions, lipophilic substances, and emulsions of lipophilic and aqueous materials. Finely divided suspensions with particle sizes up to 400 microns (0.4 mm) also can be encapsulated.
  • HYDROCAPSULES® can be produced as small as about 0.2 mm and as large as about 15 mm in diameter at present. As compared with conventional microcapsules of only a few microns in diameter, Hydrocapsules provide a more favorable surface-volume ratio, with a reduced chance of desiccation. Because they contain a larger internal volume than conventional microcapsules, the cost of encapsulating a quantity of bait should be less than with microcapsules.
  • HYDROCAPSULES® are large enough to be directly detectable by target pests, such as fire ants, which carry them into the nest and consume the contents. Semiochemicals can be incorporated into the contents or encapsulant (polymer shell), or applied to the surface to promote attraction and feeding upon the Hydrocapsule and its contents
  • HYDROCAPSULES® can provide protection of the contents from UV – since they are made using a UV process. However, additives can be put into the polymer shell to allow degradation and eventual breakdown by UV over time once the capsules are put into the field. Contents are sequestered from exposure to air and anti-oxidants such as alpha-tocopherol, BHA, BHT, or tertiary butyl hydroquinone also can be included to reduce oxidation of fatty acids and other labile agents.
  • HYDROCAPSULES® are ‘flowable’ and ameliorate problems in distributing otherwise sticky/gooey baits.
  • They can be used to encapsulate biopesticides or entomopathogenic organisms such as protozoa, bacteria, viruses, fungi, & nematodes, as well as IGRs and conventional pesticides.
  • This patent-pending technology (application has been made in the US & internationally) will provide a completely novel, proprietary method for delivering pest control agents.

Entomological Encapsulation

Under previous USDA SBIR Phase I & Phase II funding (1996 & 1997) recently developed patent-pending methods to encapsulate various insect diets (Greany and Carpenter, 1999) using proprietary Hydrocapsule® technology. In this form, the encapsulated artificial diet (a suspension of nutrients containing proteins, carbohydrates, and lipids) remains stable and sterile despite its high water content (50-75%). The size range of Hydrocapsules® Inc’s. encapsulation technology is from 100 microns up to 2 cm diameter, with a typical size of approximately 2 to 3 mm. Wall thicknesses generally range between 10 to 100 microns as measured by scanning electron microscopy (SEM). The mechanical properties of ARS Hydrocapsules® can range from hard and plastic-like, to soft and flexible, like silicone rubber. Membranes thin and soft enough to be punctured by a human hair have been produced. These softer membranes were developed to feed insects with piercing-sucking mouth parts (such as the spined soldier bug, Podisus maculiventris), and have shown the ability to penetrate through the capsule wall under laboratory conditions. It has also been observed that many species of insects with chewing mouth parts are capable of eating through the harder/thicker shell formulations of capsules (ants, mites, cockroaches, and lady beetles). Observations indicate that roaches and lady beetles actually consume the entire non-toxic Hydrocapsule® shell along with the contents. This is an unexpected benefit which has favorable environmental consequences.

These same capsules which have been successfully used to feed beneficial insects may be converted into lethal snacks for pest insects, simply by incorporating the entomopathogenic agents into the aqueous or oil-based solution core. For applications such as cockroach and fire ant baits, it would not be necessary that the shell be soft to allow the entrapped organisms to escape on their own, since the shells are easily breached by the feeding insect. In fact, the capsule can serve as a convenient package which allows the target insect to carry the infective agent directly into its nest. This feeding behavior has been observed in studies involving wild fire ants feeding on encapsulated artificial diet at the USDA-ARS Center for Medical, Agricultural and Veterinary Entomology and the University of Florida (both located in Gainesville, Florida). Incentive to feed on the capsules could also be provided by incorporation of essential nutrients, or by the addition of feeding stimulants or kairomones. For more passive delivery approaches, it is possible to adjust the shell formulation to the needs of a particular system, so that the entomopathogenic agent can emerge without direct contact between the insect and the capsule. In fact, a combination of the two release mechanisms may serve to be the most effective approach.

The Technology as applied in the field-of-use of beneficial insect food production is currently being used by Hydrocapsule Inc, the USDA, and two additional commercial customers. This technology has shown success in feeding several different insect species, to include: Orius, Geocris, C.mac ladybird beetles, cockroaches, and imported red fire ants. All insect feeding data is reported to Hydrocapsule Inc. by third party scientists and entomologists, to include: the USDA-ARS, U.S. Forest Service, the Univ. of Florida, ENTOMOS, LLC., KOPPERT Biological Systems, Inc., and several other private beneficial-insect producing companies.

The Hydrocapsules® used to feed the insects listed above, are routinely produced in a size range from 2 to 5 mm. The wall thickness of the polymer shell (coating) vary from 10 micron to 100 microns in thickness, and are typically running around 25 microns. Wall thickness as thin as 5 microns have been produced. The wall thickness of the coating is user / operator controlled, and is dependent upon several operational parameters to include: capsule size, properties and chemistry of contents, speed of production, and cleanliness of system and nozzles.

The Hydrocapsule® shell formulation that Hydrocapsule Inc. has developed specifically for beneficial insect feeding is a proprietary mixture of six (6) different chemical compounds that is available in a pre-mixed formulation or can be purchased individually from many chemical suppliers and can be mixed by the user. The cost of the chemicals used to make any formulation vary with the quantity purchased at a single time, the chemical company supplier, and the distance the chemicals have to be transported. Pricing generally decreases as more bulk weight of each chemical is purchased from a supplier and the closeness of the supplier. Chemicals can typically be purchased in 1 Gallon, 5 Gallon and 55 Gallon drum containers

Hydrocapsule Inc. has produced several different coating formulations for various other applications, that include time release, pH-activated release, and gas permeable shells

Aqua-Lure “Seeping Salmon Egg”

Visit the Aqua-Lure site for more info

Live Nematode Encapsulation

Sample Hydrocapsule Samples

Fire Ant Feeding