CA1104926A - Polymeric material film with repellent properties - Google Patents
Polymeric material film with repellent propertiesInfo
- Publication number
- CA1104926A CA1104926A CA298,196A CA298196A CA1104926A CA 1104926 A CA1104926 A CA 1104926A CA 298196 A CA298196 A CA 298196A CA 1104926 A CA1104926 A CA 1104926A
- Authority
- CA
- Canada
- Prior art keywords
- film
- pores
- repellent
- animal
- polymeric material
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Expired
Links
Classifications
-
- A—HUMAN NECESSITIES
- A01—AGRICULTURE; FORESTRY; ANIMAL HUSBANDRY; HUNTING; TRAPPING; FISHING
- A01N—PRESERVATION OF BODIES OF HUMANS OR ANIMALS OR PLANTS OR PARTS THEREOF; BIOCIDES, e.g. AS DISINFECTANTS, AS PESTICIDES OR AS HERBICIDES; PEST REPELLANTS OR ATTRACTANTS; PLANT GROWTH REGULATORS
- A01N25/00—Biocides, pest repellants or attractants, or plant growth regulators, characterised by their forms, or by their non-active ingredients or by their methods of application, e.g. seed treatment or sequential application; Substances for reducing the noxious effect of the active ingredients to organisms other than pests
- A01N25/34—Shaped forms, e.g. sheets, not provided for in any other sub-group of this main group
Landscapes
- Life Sciences & Earth Sciences (AREA)
- General Health & Medical Sciences (AREA)
- Health & Medical Sciences (AREA)
- Toxicology (AREA)
- Pest Control & Pesticides (AREA)
- Plant Pathology (AREA)
- Agronomy & Crop Science (AREA)
- Engineering & Computer Science (AREA)
- Dentistry (AREA)
- Wood Science & Technology (AREA)
- Zoology (AREA)
- Environmental Sciences (AREA)
- Wrappers (AREA)
- Agricultural Chemicals And Associated Chemicals (AREA)
- Treatments Of Macromolecular Shaped Articles (AREA)
Abstract
ABSTRACT OF THE DISCLOSURE
Garbage bags and similar articles formed of flexible polymeric material sheet are provided with long-lasting animal and/or insect repellent properties by providing selected portions of the outer surface of the film in porous form and absorbing a chemical repell-ent into the pores.
Garbage bags and similar articles formed of flexible polymeric material sheet are provided with long-lasting animal and/or insect repellent properties by providing selected portions of the outer surface of the film in porous form and absorbing a chemical repell-ent into the pores.
Description
FIELD OF INVENTION
~ . ... .
The present invention is directed to flexible polymeric material film having long-lasting animal and/or insect repellent properties, articles formed therefrom and methods of production of the film.
BACKGROUND TO TEIE INVENTION
The use of plastic garbage bags and other flexible polymeric material articles is widespread in the collection and storage oE garbage in both household and industxîal applications. It is desirable for these bags and articles to be repulsive to cats, dogs and other animals and insects.
Prior ~ttempts to render polymeric material articles repellent to animals and insects have included the surface application oE a repellent material to a non- ~
porous polymeric surface and the introduction of a -repellent during extrusion of the film from whlch the articles are made. These methods have not been success-fulf since, in the case of the surface application, the repellent is read1ly washed away or evaporated when the film comes in con-tact with water or is exposed to the air and sunlight, whilel in the case of extrusion, the repellent is evaporated during the heat buildup required for extrusion.
SUMMARY OF THE INVENTION
In~accordan~e with this invention, there iæ;
provided a polymeric mater~ial film or sheet whi~h rætains animal and/or~inæect~repellent~properties over an extend- -ed~period of time~and hence overcomes the prior art , ~ , .
problems men-tioned above.
~: ~ 2 ' ' ' .
GENERAL DESCRIPTION OF INVENTION
_ ... . . . ... _ .. _ ... _ ..
The film provided in accordance with this invention has microporosity formed in at least part of at least one surface of the film to a depth which is less than the total film depth and a chemical repellen material located in the microporous surEace.
By "microporosity" as used herein, there is , meant a plurality of closely-spaced pores ln the sur:Eace which are of small dimension sufficient to absorb chemical repellent material therein yet insufficient to permit absorbed chemical repellent material to be readily removed.
Since the repellent material is xetained w:ith-in the microporosity, the repellent action is retained for long periods until all the repellent material has r -- evaporated from the microporosity. While a number of di~ferent repellent materials may be used, it is preferred to use methyl nonyl ketone. RepelIents in liquid or . . . .
solid form may be used, as clesired.
The microporosity may be provided in the film by exposing the areas of the film in which the micro-porosity is to be formed to corona discharge of an inten-sity required to penetrate the film to the required depth. The corona discharge causes the formation of multiple number of~closely spaced pores.
The intensity of the discharge applied to the film depends on the thickness of film chosen, the depth of penetration of the film desired and the polymeric material chosen.
~ 30 ~Polyethylene is usually the polymeric mater-; ial chosen since it is readily available and mos~
:' ~.
" : ' commonly used for garbage bag applications. For poly-ethylene, the corona discharge intensity is usually in the range of abou-t 32 to about 41 dynes, with an intensity in the range of about 38 to about 41 being preferred.
Usually, a penetration of about 50~ of the thickness of the film is effected.
The corona treatment of the polymeric fllm usually is carried out on a continuous tube film at a desired width on one or both sides of the tube during the 10 extrusion process.
Following formation of the microporosity in the film, the chemical repellent is applied to and positioned in the pores. The chemical repellent may be applied to and positioned in the microporosity in any convenient manner, such as, by wiping on spray application, or pressure , ~ applicationl dependent on the nature of the formula-tion used. The positioning of the chemical repellent into the microporous surface at least partially fills the pores and leaves a dr~ exterior. The chemical repellent slowly 20 evaporates out the pores and the film retains its effect-; iveness as a repellent until all the repellenk material has evaporated from the pores. The product, therefore, retains its effectiveness over an extended period of time.
- ~ SUMMARY
The present invention, thPrefore, provides an animal and/or lnsect repellent flexihle polymeric mater-ial film, preEexably in a garbage bag form, which has long repellent life, even under adverse environmental condltions. Modi~lcations are possible withln the scope 30 of the invention.
:
~ . ... .
The present invention is directed to flexible polymeric material film having long-lasting animal and/or insect repellent properties, articles formed therefrom and methods of production of the film.
BACKGROUND TO TEIE INVENTION
The use of plastic garbage bags and other flexible polymeric material articles is widespread in the collection and storage oE garbage in both household and industxîal applications. It is desirable for these bags and articles to be repulsive to cats, dogs and other animals and insects.
Prior ~ttempts to render polymeric material articles repellent to animals and insects have included the surface application oE a repellent material to a non- ~
porous polymeric surface and the introduction of a -repellent during extrusion of the film from whlch the articles are made. These methods have not been success-fulf since, in the case of the surface application, the repellent is read1ly washed away or evaporated when the film comes in con-tact with water or is exposed to the air and sunlight, whilel in the case of extrusion, the repellent is evaporated during the heat buildup required for extrusion.
SUMMARY OF THE INVENTION
In~accordan~e with this invention, there iæ;
provided a polymeric mater~ial film or sheet whi~h rætains animal and/or~inæect~repellent~properties over an extend- -ed~period of time~and hence overcomes the prior art , ~ , .
problems men-tioned above.
~: ~ 2 ' ' ' .
GENERAL DESCRIPTION OF INVENTION
_ ... . . . ... _ .. _ ... _ ..
The film provided in accordance with this invention has microporosity formed in at least part of at least one surface of the film to a depth which is less than the total film depth and a chemical repellen material located in the microporous surEace.
By "microporosity" as used herein, there is , meant a plurality of closely-spaced pores ln the sur:Eace which are of small dimension sufficient to absorb chemical repellent material therein yet insufficient to permit absorbed chemical repellent material to be readily removed.
Since the repellent material is xetained w:ith-in the microporosity, the repellent action is retained for long periods until all the repellent material has r -- evaporated from the microporosity. While a number of di~ferent repellent materials may be used, it is preferred to use methyl nonyl ketone. RepelIents in liquid or . . . .
solid form may be used, as clesired.
The microporosity may be provided in the film by exposing the areas of the film in which the micro-porosity is to be formed to corona discharge of an inten-sity required to penetrate the film to the required depth. The corona discharge causes the formation of multiple number of~closely spaced pores.
The intensity of the discharge applied to the film depends on the thickness of film chosen, the depth of penetration of the film desired and the polymeric material chosen.
~ 30 ~Polyethylene is usually the polymeric mater-; ial chosen since it is readily available and mos~
:' ~.
" : ' commonly used for garbage bag applications. For poly-ethylene, the corona discharge intensity is usually in the range of abou-t 32 to about 41 dynes, with an intensity in the range of about 38 to about 41 being preferred.
Usually, a penetration of about 50~ of the thickness of the film is effected.
The corona treatment of the polymeric fllm usually is carried out on a continuous tube film at a desired width on one or both sides of the tube during the 10 extrusion process.
Following formation of the microporosity in the film, the chemical repellent is applied to and positioned in the pores. The chemical repellent may be applied to and positioned in the microporosity in any convenient manner, such as, by wiping on spray application, or pressure , ~ applicationl dependent on the nature of the formula-tion used. The positioning of the chemical repellent into the microporous surface at least partially fills the pores and leaves a dr~ exterior. The chemical repellent slowly 20 evaporates out the pores and the film retains its effect-; iveness as a repellent until all the repellenk material has evaporated from the pores. The product, therefore, retains its effectiveness over an extended period of time.
- ~ SUMMARY
The present invention, thPrefore, provides an animal and/or lnsect repellent flexihle polymeric mater-ial film, preEexably in a garbage bag form, which has long repellent life, even under adverse environmental condltions. Modi~lcations are possible withln the scope 30 of the invention.
:
Claims (7)
1. A flexible film of flexible polymeric material having a plurality of closely-spaced microscopic pores extending part-way through the thickness of the film and a chemical animal and/or insect repellent material absorb-ed in said pores to impart to said film long-lasting animal and/or insect repellent properties resistant to environmental removal.
2. The film of claim 1 wherein said pores extend to a depth of about 50% of the thickness of the film.
3. The film of claim 1 wherein said repellent is methyl nonyl ketone.
4. The film of claim 1 formed into a bag structure with said microscopic pores positioned in the exterior surface of the bag.
5. A method for the production of flexible poly-meric film having long lasting animal and/or insect repellent properties resistant to environment removal, which includes subjecting at least a selected portion of said film to corona discharge to form a plurality of closely spaced microscopic pores in said portion to a depth effective to absorb a chemical animal and/or insect repellent material therein and absorbing said chemical material into said pores.
6. The method of claim 5 wherein said polymeric material is polyethylene and said corona discharge is effected at an intensity of about 38 to about 41 dynes.
7. The method of claim 5 wherein said repellent is methyl nonyl ketone.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CA298,196A CA1104926A (en) | 1978-03-03 | 1978-03-03 | Polymeric material film with repellent properties |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CA298,196A CA1104926A (en) | 1978-03-03 | 1978-03-03 | Polymeric material film with repellent properties |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CA1104926A true CA1104926A (en) | 1981-07-14 |
Family
ID=4110910
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CA298,196A Expired CA1104926A (en) | 1978-03-03 | 1978-03-03 | Polymeric material film with repellent properties |
Country Status (1)
| Country | Link |
|---|---|
| CA (1) | CA1104926A (en) |
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US4656057A (en) * | 1983-07-28 | 1987-04-07 | Rohm And Haas Company | Microbiocidal article for aqueous systems |
| FR2622769A1 (en) * | 1987-11-06 | 1989-05-12 | Lautier | New animal-repelling agents, and plastic articles or materials containing these agents |
| EP0582823A1 (en) * | 1992-07-06 | 1994-02-16 | Sumitomo Chemical Company, Limited | Slow-releasing resin moldings and process for producing the same |
| EP0923866A1 (en) * | 1997-12-11 | 1999-06-23 | British Polythene Limited | Improvements in and relating to stretch film packaging |
-
1978
- 1978-03-03 CA CA298,196A patent/CA1104926A/en not_active Expired
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US4656057A (en) * | 1983-07-28 | 1987-04-07 | Rohm And Haas Company | Microbiocidal article for aqueous systems |
| FR2622769A1 (en) * | 1987-11-06 | 1989-05-12 | Lautier | New animal-repelling agents, and plastic articles or materials containing these agents |
| EP0582823A1 (en) * | 1992-07-06 | 1994-02-16 | Sumitomo Chemical Company, Limited | Slow-releasing resin moldings and process for producing the same |
| US5476652A (en) * | 1992-07-06 | 1995-12-19 | Sumitomo Chemical Company, Limited | Slow-releasing medicated resin moldings, and process for producing the same |
| EP0923866A1 (en) * | 1997-12-11 | 1999-06-23 | British Polythene Limited | Improvements in and relating to stretch film packaging |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| MKEX | Expiry |