KR101105574B1 - Absorbent articles comprising an encapsulated plant extract showing insecticidal effect - Google Patents

Absorbent articles comprising an encapsulated plant extract showing insecticidal effect Download PDF

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KR101105574B1
KR101105574B1 KR1020090029179A KR20090029179A KR101105574B1 KR 101105574 B1 KR101105574 B1 KR 101105574B1 KR 1020090029179 A KR1020090029179 A KR 1020090029179A KR 20090029179 A KR20090029179 A KR 20090029179A KR 101105574 B1 KR101105574 B1 KR 101105574B1
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South Korea
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insect repellent
microcapsules
disposable absorbent
present invention
absorbent article
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KR1020090029179A
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Korean (ko)
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KR20100110919A (en
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박직환
이원영
이진희
조수용
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유한킴벌리 주식회사
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    • AHUMAN NECESSITIES
    • A61MEDICAL OR VETERINARY SCIENCE; HYGIENE
    • A61LMETHODS OR APPARATUS FOR STERILISING MATERIALS OR OBJECTS IN GENERAL; DISINFECTION, STERILISATION, OR DEODORISATION OF AIR; CHEMICAL ASPECTS OF BANDAGES, DRESSINGS, ABSORBENT PADS, OR SURGICAL ARTICLES; MATERIALS FOR BANDAGES, DRESSINGS, ABSORBENT PADS, OR SURGICAL ARTICLES
    • A61L15/00Chemical aspects of, or use of materials for, bandages, dressings or absorbent pads
    • A61L15/16Bandages, dressings or absorbent pads for physiological fluids such as urine or blood, e.g. sanitary towels, tampons
    • A61L15/42Use of materials characterised by their function or physical properties
    • A61L15/46Deodorants or malodour counteractants, e.g. to inhibit the formation of ammonia or bacteria
    • AHUMAN NECESSITIES
    • A61MEDICAL OR VETERINARY SCIENCE; HYGIENE
    • A61FFILTERS IMPLANTABLE INTO BLOOD VESSELS; PROSTHESES; DEVICES PROVIDING PATENCY TO, OR PREVENTING COLLAPSING OF, TUBULAR STRUCTURES OF THE BODY, e.g. STENTS; ORTHOPAEDIC, NURSING OR CONTRACEPTIVE DEVICES; FOMENTATION; TREATMENT OR PROTECTION OF EYES OR EARS; BANDAGES, DRESSINGS OR ABSORBENT PADS; FIRST-AID KITS
    • A61F13/00Bandages or dressings; Absorbent pads
    • A61F13/15Absorbent pads, e.g. sanitary towels, swabs or tampons for external or internal application to the body; Supporting or fastening means therefor; Tampon applicators
    • A61F13/84Accessories, not otherwise provided for, for absorbent pads
    • A61F13/8405Additives, e.g. for odour, disinfectant or pH control
    • AHUMAN NECESSITIES
    • A61MEDICAL OR VETERINARY SCIENCE; HYGIENE
    • A61LMETHODS OR APPARATUS FOR STERILISING MATERIALS OR OBJECTS IN GENERAL; DISINFECTION, STERILISATION, OR DEODORISATION OF AIR; CHEMICAL ASPECTS OF BANDAGES, DRESSINGS, ABSORBENT PADS, OR SURGICAL ARTICLES; MATERIALS FOR BANDAGES, DRESSINGS, ABSORBENT PADS, OR SURGICAL ARTICLES
    • A61L15/00Chemical aspects of, or use of materials for, bandages, dressings or absorbent pads
    • A61L15/16Bandages, dressings or absorbent pads for physiological fluids such as urine or blood, e.g. sanitary towels, tampons
    • A61L15/40Bandages, dressings or absorbent pads for physiological fluids such as urine or blood, e.g. sanitary towels, tampons containing ingredients of undetermined constitution or reaction products thereof, e.g. plant or animal extracts
    • AHUMAN NECESSITIES
    • A61MEDICAL OR VETERINARY SCIENCE; HYGIENE
    • A61FFILTERS IMPLANTABLE INTO BLOOD VESSELS; PROSTHESES; DEVICES PROVIDING PATENCY TO, OR PREVENTING COLLAPSING OF, TUBULAR STRUCTURES OF THE BODY, e.g. STENTS; ORTHOPAEDIC, NURSING OR CONTRACEPTIVE DEVICES; FOMENTATION; TREATMENT OR PROTECTION OF EYES OR EARS; BANDAGES, DRESSINGS OR ABSORBENT PADS; FIRST-AID KITS
    • A61F13/00Bandages or dressings; Absorbent pads
    • A61F13/15Absorbent pads, e.g. sanitary towels, swabs or tampons for external or internal application to the body; Supporting or fastening means therefor; Tampon applicators
    • A61F13/84Accessories, not otherwise provided for, for absorbent pads
    • A61F13/8405Additives, e.g. for odour, disinfectant or pH control
    • A61F2013/8408Additives, e.g. for odour, disinfectant or pH control with odour control
    • A61F2013/8435Additives, e.g. for odour, disinfectant or pH control with odour control with plant derivatives
    • AHUMAN NECESSITIES
    • A61MEDICAL OR VETERINARY SCIENCE; HYGIENE
    • A61FFILTERS IMPLANTABLE INTO BLOOD VESSELS; PROSTHESES; DEVICES PROVIDING PATENCY TO, OR PREVENTING COLLAPSING OF, TUBULAR STRUCTURES OF THE BODY, e.g. STENTS; ORTHOPAEDIC, NURSING OR CONTRACEPTIVE DEVICES; FOMENTATION; TREATMENT OR PROTECTION OF EYES OR EARS; BANDAGES, DRESSINGS OR ABSORBENT PADS; FIRST-AID KITS
    • A61F13/00Bandages or dressings; Absorbent pads
    • A61F13/15Absorbent pads, e.g. sanitary towels, swabs or tampons for external or internal application to the body; Supporting or fastening means therefor; Tampon applicators
    • A61F13/84Accessories, not otherwise provided for, for absorbent pads
    • A61F13/8405Additives, e.g. for odour, disinfectant or pH control
    • A61F2013/8447Additives, e.g. for odour, disinfectant or pH control in using different incompatible substances
    • A61F2013/8452Additives, e.g. for odour, disinfectant or pH control in using different incompatible substances being contained in microcapsules
    • AHUMAN NECESSITIES
    • A61MEDICAL OR VETERINARY SCIENCE; HYGIENE
    • A61LMETHODS OR APPARATUS FOR STERILISING MATERIALS OR OBJECTS IN GENERAL; DISINFECTION, STERILISATION, OR DEODORISATION OF AIR; CHEMICAL ASPECTS OF BANDAGES, DRESSINGS, ABSORBENT PADS, OR SURGICAL ARTICLES; MATERIALS FOR BANDAGES, DRESSINGS, ABSORBENT PADS, OR SURGICAL ARTICLES
    • A61L2300/00Biologically active materials used in bandages, wound dressings, absorbent pads or medical devices
    • A61L2300/20Biologically active materials used in bandages, wound dressings, absorbent pads or medical devices containing or releasing organic materials
    • A61L2300/30Compounds of undetermined constitution extracted from natural sources, e.g. Aloe Vera
    • AHUMAN NECESSITIES
    • A61MEDICAL OR VETERINARY SCIENCE; HYGIENE
    • A61LMETHODS OR APPARATUS FOR STERILISING MATERIALS OR OBJECTS IN GENERAL; DISINFECTION, STERILISATION, OR DEODORISATION OF AIR; CHEMICAL ASPECTS OF BANDAGES, DRESSINGS, ABSORBENT PADS, OR SURGICAL ARTICLES; MATERIALS FOR BANDAGES, DRESSINGS, ABSORBENT PADS, OR SURGICAL ARTICLES
    • A61L2300/00Biologically active materials used in bandages, wound dressings, absorbent pads or medical devices
    • A61L2300/60Biologically active materials used in bandages, wound dressings, absorbent pads or medical devices characterised by a special physical form
    • A61L2300/62Encapsulated active agents, e.g. emulsified droplets
    • A61L2300/622Microcapsules

Abstract

The present invention relates to a disposable absorbent article to which the encapsulated natural plant extract exhibiting an insect repellent effect is applied. Specifically, in a disposable absorbent article including a liquid permeable top sheet, an absorbent core and a liquid impermeable back sheet, cinnamon exhibiting insect repellent effect The present invention relates to disposable absorbent articles to which insect repellent microcapsules microencapsulated one or more natural plant extracts selected from the group consisting of rosemary, lavender, mint and eucalyptus. Disposable absorbent article according to the present invention can effectively and continuously block the influx of pests into the product that can occur during the distribution and storage of the product is applied to the plant extracts in the form of microcapsules that are harmless to the human body naturally showing the insect repellent effect. .
Insect Repellent, Natural Plant Extract, Microcapsules

Description

ABSORBENT ARTICLES COMPRISING AN ENCAPSULATED PLANT EXTRACT SHOWING INSECTICIDAL EFFECT}

The present invention relates to a disposable absorbent article to which insect repellent microcapsules microencapsulated one or more natural plant extracts selected from the group consisting of cinnamon, rosemary, lavender, mint and eucalyptus exhibiting insect repellent effect.

Disposable absorbent articles refer to products absorbing body fluids excreted by various physiological actions, and examples thereof include diapers, training pants, adult incontinence products, absorbent underwear, feminine hygiene products, and lactation pads. The performance of such disposable absorbent articles is primarily evaluated by the amount and rate of absorption of body fluid secreted by physiological action, but in the field of absorbency and absorption rate, many developments have been made by the development of super absorbent polymers. .

After absorption, the performance of a disposable absorbent article should be able to prevent skin diseases that can occur from the use of this product in body fluid excretion. In addition, since the body fluid absorbed by the absorbent article generally contains an unpleasant odor, development of a method of applying a fragrance or deodorant to the absorbent article has been actively made. In addition, as pests are introduced during distribution and storage in recent years, the quality of absorbent articles may be degraded and hygiene may be a problem, and thus, development of a method for effectively preventing larvae or adult insects from entering the product is required. .

In general, the most frequently introduced pests in the distribution and storage process of absorbent products include molds and bacteria such as mosquitoes, rice weevil, rice thief, Hwaranggok moth larvae and yellow blight bacteria. Or it penetrates inside and rapidly reproduces to excrete and degrade product quality.

In order to control such pests, fumigants such as methyl bromide, aluminum phosphide, and chlorpicrin may be used as insecticides. However, these insecticides are organic synthetic insecticides, such as residual toxicity, adverse effects on the human body, and increased resistance in various pest species. Has a problem. Recently, in order to solve the problems of organic synthetic insecticides, various attempts have been made to use vegetable essential oils extracted from natural products as pest inhibitors. Many plant extracts and vegetable essential oils have been reported to exhibit scattering, repelling, and insecticidal activity against pests of various stored produce. For example, essential oils of irises have been reported to have bactericidal activity against red bean weevil, rice weevil, rice thief, and powdered worm.

As a well-known technique with respect to the composition for pest control which mainly uses the vegetable component, it is typical as follows. U.S. Patent No. 4,455,304 discloses an animal repellent composition comprising a vegetable essential oil extracted from red pepper and garlic as a main ingredient and a method of using the composition. US Patent No. 4,440,783 discloses animal repellents comprising isothiocyanate and lemon oil as active ingredients, and WO 99/22751 discloses a combination of pepper extract, allyl isocyanate and lemon oil in methyl bromide. Alternative methods are described for use as soil treatments, pesticides, stored grains and building fumigants. In addition, techniques related to food preservatives, films and the like using antibacterial effects of allyl isothiocyanate, the main components of horseradish oil and mustard oil, are known as separate patents. In addition, folk remedies were used to control pests by putting whole garlic, red pepper, and charcoal in a storage container such as a rice container for the purpose of preserving the quality of the stored agricultural products, but the control effect was not so great.

It is a product formulated with vegetable essential oils by improving the folk remedies as described above, and used allicin extracted from garlic and capsaicin extracted from red pepper in a breathable container of synthetic resin to be used as a quality preservative of rice. -38678). However, the vegetable essential oil as described above is a volatile substance, and the insecticidal activity is mainly through the fumigation of the volatile pesticides, so there is a problem in that a rapid volatilization of the active ingredient occurs in a short time, the insecticidal effect is not persistent. Therefore, there is a need for the development of a formulation that can maintain a sustained insecticidal effect by inhibiting the rapid volatilization of the plant essential oil as described above and controlling the release rate.

In addition, the existing pest control targets the distribution and storage of agricultural products, and for the absorbent products which come into direct contact with the human body, there have been no reports of insect repellent effects added for the purpose of pest control. Therefore, it is urgent to develop a formulation that can effectively prevent pest inflow into disposable absorbent articles by continuously maintaining the insect repellent effect of the natural plant extract having the advantages of human-friendly and environmentally friendly.

Therefore, the inventors of the present invention sought to develop a human-friendly and environmentally friendly method that can prevent the influx of larvae or adults in the distribution and storage of disposable absorbent articles, cinnamon, rosemary, lavender, mint, Microencapsulating natural plant extracts such as eucalyptus and applying them to manufacture disposable absorbent articles can effectively and continually prevent larvae such as galaxies moths from flowing and stored in disposable absorbents in a harmless way. The present invention was completed by confirming the presence of the present invention.

Therefore, an object of the present invention is to provide a disposable absorbent article applied by encapsulating a natural plant extract that is harmless to the human body while continuously exhibiting insect repellent effect that can effectively prevent the influx of larvae or adults in the distribution and storage process.

In order to achieve the above object, the present invention is selected from the group consisting of cinnamon, rosemary, lavender, mint and eucalyptus exhibiting insect repellent in a disposable absorbent article comprising a liquid permeable topsheet, an absorbent core and a liquid impermeable backsheet. It provides a disposable absorbent article applied to the insect repellent microcapsules microencapsulated one or more natural plant extracts.

Disposable absorbent article according to the present invention is a plant extract that is harmless to the human body naturally showing the insect repellent effect is applied in the form of microcapsules continuously exhibit excellent insect repellent effect by the pest inflow into the product that can occur during distribution and storage of the product Can be effectively blocked.

The present invention provides a disposable absorbent article is applied to the encapsulated natural plant extracts exhibiting insect repellent effect.

Specifically, the present invention provides a disposable absorbent article comprising a liquid permeable topsheet, an absorbent core and a liquid impermeable backsheet, wherein at least one selected from the group consisting of cinnamon, rosemary, lavender, mint and eucalyptus exhibiting insect repellent effect. It provides a disposable absorbent article is applied to the insect repellent microcapsules microencapsulated natural plant extracts.

Natural plants having an insect repellent effect that can be used in the present invention include cinnamon, rosemary, lavender, peppermint and eucalyptus.

Cinnamomum cassia bark is a bark of the evergreen tree of the camphor tree, which grows in southern China and Vietnam. Cinnamon is the bark of an arbor tree, branch is its branch, and broiler is the thick bark, and gyesim means the dried bark of an old tree. Cinnamon contains 1 to 3.4% of essential oils such as cinnamon aldehyde and cinnamic aldehyde, 2 to 3% of tannins, mucus, carbohydrates, etc. Cinnamon has been used in various ways as an antiperspirant, antipyretic, analgesic, as well as perfume in food products. In addition, it is known that there is an antiseptic effect to promote intestinal peristalsis and suppress abnormal fermentation of the intestine, but the specific mechanism is not known. In addition, cinnamon has been anticipated to have an effect of promoting immunity as a herbal medicine for people with weak constitutions and blood donors since ancient times, but the exact mechanism is also unknown.

Patents related to compositions containing cinnamon extract include compositions for preventing and treating atherosclerosis containing cinnamon extract (Korean Patent Publication No. 2000-1280), and cosmetic compositions containing broiler cinnamon extract (Korean Patent Publication No. 2001-18668). ) And a composition for enhancing oral hygiene (Korean Patent Publication No. 2004-46309) containing nanoparticles cinnamon extract, but none of these patents describes the insect repellent effect of cinnamon.

Rosemary ( Rosmarinus officinalis L.) is an evergreen tree native to the Mediterranean family belonging to Lamiaceae (Labiatae), and is an herb that is useful not only for edible, but also for medicinal, beauty, fragrance and ornamental purposes. Rosemary uses stems, flowers, and leaves. Especially, the essential oils are excellent for lethargy and fatigue. It is effective in preventing dementia by inhibiting the occurrence of edema and dandruff and promoting hair growth, and by encouraging brain cells with strong fragrance to improve memory and concentration, and to promote digestion, stomach pain, etc. Not only is it ideal for treatment, it is also used as an antibacterial household product. Rosemary contains essential oils such as 1,8-cineole and camphor, and high-flavor ingredients such as rosmarinic acid. (Bisset NG, Herbal drugs CRC press, London, 428-430, 2000; Duke JA et al., Handbook of medicinal herbs CRC press, London, 630-632, 2002). In recent years, this plant has been grown in Korea for herb bonsai, and rosemary oil has been used in a variety of formulations by combining different aromas in aromatherapy. Applications are also being actively studied (Choo JJ et al., Korean J. Food Culture 16: 34-138, 2003; Koleva II et al . , Phytochem Anal. 13: 8-17, 2002). However, none of the above text teaches the insect repellent effect of rosemary.

Pure Lavender ( Lavendula angustifolia MILL) is a subshrub that grows to about 60 cm in length, and originates from Canary Island to the Indian Peninsula, which spans the Mediterranean coast. In particular, essential oils in the aerial parts (mainly monoterpenes), as well as caffeic acid and depsides in the leaves are known as the main components. Essential oils formulated in lavender have traditionally been used for therapeutic purposes such as aromatherapy as well as cosmetics. For example, the antibacterial, antifungal, spasmolytic, sedative and antidepressant effects of lavender oil are described (HMA Cavanagh et al . , Phytother. Res. 16: 301-308, 2002).

In Germany, preparations using extracts of lavender flowers as bath additives in conditions of restlessness, disorders in getting to sleep, functional ailment of the abdomen, signs of meteorism, and spa therapy It is being studied positively. Recently, oral administration of lavender oil has been found to result in significant improvement in various disease-related symptoms in patients suffering from nervous breakdown, somatization disorder and / or post-traumatic stress disorder. In addition, stress-induced behavioural changes in animal experiments were significantly suppressed by oral administration of lavender oil. However, there has been no report on the insect repellent effect of lavender.

Peppermint (peppermint) is a perennial plant of the dicotyledon plant currency neck Lamiaceae, haejugo cool the skin and mucous membranes, it has been used as effective, then edible and medicinal and aromatic, prototype enhancer and bath additives, antibacterial and pain relief. Peppermint oil is known to remove toxins and to be effective in dermatitis, vaccines, dry planes, pruritus, etc. It is also effective in itching, inflammation, and sunburn by expanding capillaries and cooling. Peppermint oil is also known to be effective in softening the skin and eliminating acne, and is effective in mental fatigue, depression, and nervous attacks. However, these peppermint oils have a strong and overwhelming feeling, so they must be used with great care and irritate the skin and mucous membranes. Use is restricted to pregnant or nursing mothers.

Eucalyptus globulus is a plant with more than 300 species and fragrances all over the world, native to Australia and growing mainly in the tropics. The amount of essential oil contained in eucalyptus leaves is about 2-7%. The essential oil is a colorless to pale yellow transparent liquid with a characteristic stinging aroma and taste that is irritating or refreshing. Eucalyptus is used in soaps, liquors, fragrances, and medicines, and is particularly used in antiseptics, expectorants, mouthwashes, antitussives, and disinfectants.

Extracts of the natural plants listed above may be obtained according to a conventional extraction method using water or lower alcohol, or may be purchased by using an extract of each natural plant commercially available.

Conventional extraction methods of natural plants are, for example, first drying the natural raw materials, grinding and pulverizing them, then adding about 1 to 10 times the dry weight, preferably about 2 to 6 times the water or lower alcohol. Ultrasonic extraction for about 1 to 5 hours, preferably about 2 to 4 hours while heating to about 20 to 60 ℃, preferably about 30 to 50 ℃ obtained by cooling and filtration and concentrated under reduced pressure using a rotary evaporator Can be. In this case, the filtration process may be repeated two or more times with respect to the residue remaining after the filtration. The lower alcohol that can be used as the extraction solvent may include methanol, aqueous methanol solution, ethanol, aqueous ethanol solution, normal propanol, iso-propanol, normal butanol or a mixed solvent thereof, and preferably water or ethanol Can be.

In addition, the natural extract obtained above is suspended in distilled water, followed by hydrothermal extraction or fractional extraction using a nonpolar solvent such as dichloromethane, n-hexane, chloroform or ethyl acetate, thereby preparing a nonpolar solvent-soluble natural extract suitable for the present invention. Preferably a dichloromethane soluble extract can be obtained.

In addition, the natural extract of the present invention can be prepared by the essential oil extraction method by steam distillation, compression, adsorption, leaching, supercritical gas extraction.

Natural plant extracts as described above may be used alone or in combination of two or more thereof. Dipropylene glycol, dioctyl adipate, as a substrate solvent for dissolving one or more natural plant extracts and enhancing their compatibility and fragrance scent duration DOA), isopropyl myristate (IPM), propylene glycol (PG), floralyn and the like.

Natural plant extract of the present invention exhibits insect repellent effect on the insects or larvae of various pests, such pests include, but are not limited to, hygienic pests, stored pests, agricultural pests, building pests and forest pests. Representative examples of sanitary pests are mosquitoes, flies, wheels, ticks, and ants. Representative examples of stored pests are Hwaranggok moth, red bean weevil, rice weevil, wild egg moth, single pointed rice moth, barley moth, and false rice steal. , Black worms, blacksmiths, are flatworms, long-headed braids, assholes, dark bogs and worms. Representative examples of dry pests are termites, and representative examples of forest pests are pine needles, white fire moth, tent moth, gypsy moth, cicada moth, scarab, aphids, mite, pine bark beetle, pine broadleaf bee and pineapple Moths and pine needles. Representative agricultural pests include greenhouse dusts, Nilaparvata lugens Stal, Laodelphax striatellus Fallen, white locusts, cactus larvae, and larvae.

Natural plant extracts prepared as described above are microencapsulated (encapsulation) in order to continuously exhibit the insect repellent effect. In the present invention, "encapsulation" refers to a particle including a main ingredient therein and a shell present therein, and the main ingredient and the ingredient of the shell may be variously selected according to the purpose of encapsulation. The purpose of encapsulation is, for example, to 1) convert the liquid into a solid to facilitate handling or storage, 2) to separate the reacting substances, 3) to control the rate of release of the internal principal component, or 4) Masking odors, or 5) protecting unstable substances.

In the present invention, by producing a microcapsules of natural plant extracts showing the insect repellent effect to control the release rate of the natural plant extracts encapsulated inside the capsule while at the same time to ensure the stability of these components to the external environment to exhibit a continuous insect repellent effect Can be.

In the present invention, the term "insect repellent microcapsules" by encapsulating the natural plant extracts exhibiting the insect repellent micro-encapsulation and encapsulating the natural plant extracts inside the shell to ensure the controlled release and stability of the natural plant extracts can continue to exhibit excellent insect repellent effect Microcapsules present.

Insect repellent microcapsules according to the present invention can be prepared by a variety of methods known in the art. In general, methods for encapsulating a lipophilic component include interfacial polymerization, spray drying, in-situ polymerization, and the like. In particular, the method for preparing microcapsules using the aromatic component as a wicking material is disclosed in US Pat. Nos. 5,011,634, 4,965,025, 4,824,823, and German Patent No. 3,543,803.

In the present invention, one or more natural plant extracts are dissolved in a hydrocarbon solvent and diluted, followed by fine dispersion emulsification with stirring at a speed of 100 to 12,000 rpm using an emulsifier, followed by urea or melamine, formaldehyde and water. A polymerization solution is prepared, and a weakly acidic additive is added to the prepolymerization solution to polymerize at 50 to 90 ° C., thereby preparing insect repellent microcapsules containing natural plant extracts. At this time, the emulsion temperature during the preparation of the microcapsules is 10 to 50 ℃, characterized in that the prepolymerization solution is cooled to 30 to 60 ℃ used before the polymerization.

The insect repellent microcapsules prepared as described above contain 5 to 30% by weight of natural plant extracts. If the content of the natural plant extracts in the microcapsules is too low, the degree of fragrance may not be low, and sufficient insect repellent effect may not be expected. If it is too high, the insect repellent effect is excellent, but the smell is so strong that it may cause a rejection to the consumer.

The thickness of the urea-formaldehyde or melamine-formaldehyde layer may be adjusted as the ratio of the emulsion and the prepolymerization solution. If the resin layer is too thin, the durability is inferior, and if it is too thick, there is no bursting of the capsule due to friction, so the insect repellent effect of the natural plant extract on the disposable absorbent article cannot be expected.

Insulated insect repellent microcapsules according to the present invention prepared in the disposable absorbent article comprising a liquid permeable top sheet, an absorbent core and a liquid impermeable back sheet, liquid permeable top sheet, absorbent core, liquid impermeable back sheet, flap ( It can be applied to flap, adhesive loop (loop), adhesive band (hook), wrapping paper, etc. and may exhibit insect repellent effect. Preferably, individual products are applied to the backsheet to effectively block the invasion of insects from the outside. At this time, the insect repellent microcapsules according to the present invention is preferably included in 0.0006 to 0.03% by weight relative to the total weight of the disposable absorbent article. In a preferred embodiment of the present invention, the insect repellent microcapsules according to the present invention can be applied to the back sheet in the form of a film or non-woven fabric can be used in the production of disposable absorbent articles exhibiting insect repellent effect.

The backsheet according to the present invention, in the form of a film, a nonwoven fabric and a film / nonwoven laminate, first describes a backsheet in the form of a film to which insect repellent microcapsules are applied.

The backsheet in the form of a film according to the invention can be prepared using blended insect repellent microcapsules with a thermoplastic polymer forming the backsheet matrix to produce a masterbatch and then casting or expanding film extrusion, or other suitable film-forming technique. However, it is suitable to prepare by casting at about 170 to 240 ° C., preferably at about 180 to 230 ° C., through a T-die in view of maintaining the persistence of the insect repellent effect.

The manufacturing method of the back sheet of the film form which concerns on this invention through this T-die is as follows.

First, after preparing the masterbatch by mixing the insect repellent microcapsules according to the present invention and the thermoplastic polymer in a desired ratio, it is introduced into an extruder, melted and mixed, and then finely dispersed through a screen pack device inside the T-die. Induce and remove foreign substances. It is then cast into a film through a T-die and then the cast film is passed through a cooling roll. Thereafter, the film may be cut and wound according to a desired width to prepare a back sheet in the form of a film according to the present invention. Moreover, the corona treatment or the embossing process which is a general back sheet process can be given to such a manufacturing process as needed.

Insect repellent microcapsules containing the masterbatch used in the production of the film sheet according to the present invention has a composition of 40 to 50% thermoplastic polymer, 40 to 50% filler, 1 to 10% insect repellent microcapsules and 0.1 to 5% additives. The additive in the insect repellent microcapsules containing masterbatch may be various additives according to desired properties such as antioxidants and dyes.

Thermoplastic polymers used in the masterbatch containing insect repellent microcapsules include ultra low density polyethylene (VLDPE), low density polyethylene (LDPE), high density polyethylene (HDPE), polypropylene, copolymers of ethylene and C 3 -C 12 alpha-olefins, propylene Soluble polyolefins, elastomers, including polyurethanes, co-polymers of ethylene and / or C 4 -C 12 alpha-olefins and propylene-based polymers comprising both atactic and isotactic propylene units in the polypropylene backbone Polyether ester, polyester degradable resin, polyamide polyether block copolymer, ethylene vinyl acetate copolymer, copoly (styrene / ethylene-butylene), styrene-poly (ethylene-propylene) -styrene, styrene-poly (ethylene -Butylene) -styrene, polystyrene / poly (ethylene-butylene) / polystyrene, poly (styrene / ethylene-butylene / styrene), etc. And the like, but is a block copolymer having the 'formula AB or ABA, but are not limited to.

The amount of the insect repellent microcapsules according to the present invention applied according to the above process is suitably about 0.01 to 0.5% by weight, preferably about 0.01 to 0.3% by weight based on the total weight of the back sheet. When the amount of the insect repellent microcapsules is less than 0.01% by weight can not achieve the desired level of insect repellent effect, when the amount is more than 0.5% by weight is a level that the user can detect the smell is not desirable not.

The film prepared as described above may be used as a back sheet in the present invention, but the film prepared by casting the masterbatch containing the insect repellent microcapsules to which filler particles such as CaCO 3 are added is preheated, stretched and heat fixed in three steps. A film provided with air permeability by elongating uniaxially or biaxially via may also be used as the backsheet in the present invention. At this time, the stretching process is made through the first and second, the stretching temperature is set in consideration of the evaporation and decomposition of the insect repellent microcapsules, about 20 to 70 ℃, preferably about 40 to 45 ℃ is suitable, elongation rate About 160 to 350%, preferably about 180 to 220%. The heat fixation process takes place at 20 to 100 ° C., preferably about 70 ° C. or less, taking into account the evaporation and decomposition of the insect repellent microcapsules.

The elongated film should have a thickness that enables structural integrity and liquid impermeability. The film after stretching should have a thickness of about 50 to 300 microns, preferably about 100 microns.

In addition, the back sheet according to the present invention is a spunbond, meltblown, thermal-bonded carded web, through- Air-bonded carded web, spunlace, spunbond-meltblown-spunbond (SMS) or spunbond-meltblown-meltblown-spunbond (SMMS) It may preferably be a nonwoven fabric of spunbond-meltblown-spunbond or spunbond-meltblown-meltblown-spunbond.

The insect repellent microcapsule-containing nonwoven fabric may be manufactured by, for example, immersion, by mixing the insect repellent microcapsules in a masterbatch using a yarn containing insect repellent microcapsules, or by using a printing technique. have.

Specifically, the nonwoven fabric using the deposition method

1) manufacturing the nonwoven fabric in a general process;

2) passing the prepared nonwoven fabric through an immersion tank mixed with insect repellent microcapsules according to the present invention; And

3) may be produced by sequentially performing the step of drying the nonwoven fabric passing through the immersion tank with hot air at a set temperature.

In a preferred embodiment of the present invention, after the production of the general nonwoven fabric by a method of treating the insect repellent microcapsules in the post-treatment process unwinding the nonwoven fabric wound on the unwinding roller (unwindeing roller) while passing through the insect repellent microcapsule and the adhesive mixing tank After drying by using a hot air dryer set to a constant temperature, the insect repellent microcapsules are fixed to the nonwoven fabric, and then wound with a winding roller to obtain a nonwoven fabric coated with the insect repellent microcapsules.

Nonwoven fabric using printing technique

1) manufacturing the nonwoven fabric in a general process; And

2) It can be prepared by sequentially performing the step of attaching the solution of the insect repellent microcapsules dispersed on the nonwoven fabric by passing through the printing solution and the printed copper plate dispersed in the insect repellent microcapsules according to the present invention.

In a preferred embodiment of the present invention, after manufacturing the general nonwoven fabric by unwinding the nonwoven fabric wound on the unwinding roller to pass through the printing solution and the printing copper plate to disperse the insect repellent microcapsules by attaching the solution dispersed in the insect repellent microcapsules as printing on the nonwoven fabric Insect repellent microcapsules are printed to give a nonwoven fabric with the necessary shape attached to the required portion.

Non-woven fabric using masterbatch

1) preparing a masterbatch by mixing a thermoplastic polymer for preparing a nonwoven fabric and the insect repellent microcapsules according to the present invention at a predetermined ratio;

2) preparing a yarn containing insect repellent microcapsules through fiber spinning using the masterbatch; And

3) can be produced by sequentially performing the step of manufacturing the nonwoven fabric through the nonwoven fabric forming apparatus using the yarn.

The nonwoven fabric is preferably included in the range of 0.01 to 0.5% by weight relative to the weight of the thermoplastic polymer constituting the nonwoven fabric insect repellent microcapsules according to the present invention.

In a preferred embodiment of the present invention, by preparing a nonwoven fabric containing a insect repellent microcapsule in the yarn for manufacturing nonwoven fabric before manufacturing the nonwoven fabric, to prepare a nonwoven fabric containing the insect repellent microcapsules, the yarn is prepared by mixing the insect repellent microcapsules in a masterbatch. In other words, the thermoplastic polymer and the insect repellent microcapsules are mixed in a predetermined ratio to prepare a masterbatch, fabricate the insect repellent microcapsule-containing yarns using fiber spinning, and then insert the yarns containing the insect repellent microcapsules into the nonwoven fabric forming apparatus. It is manufactured to be contained in the nonwoven fabric itself.

The method of making a nonwoven fabric by mixing insect repellent microcapsules in a masterbatch for manufacturing a nonwoven fabric may compensate for the disadvantage that the insect repellent microcapsules are separated from the nonwoven fabric and stained on the user's skin of a disposable absorbent article or washed off by secretions.

In addition, the back sheet according to the present invention is a general non-woven fabric of the insect repellent microcapsule-containing film using an adhesive or heat adhesive such as solvent type glue (hot melt adhesive) or cold glue (cold glue) It may be laminated with or, the insect repellent microcapsule-containing nonwoven fabric laminated with a normal film, or the film / non-woven fabric laminate of the insect repellent microcapsule-containing film and the insect repellent microcapsule-containing nonwoven fabric. At this time, the applied amount of the insect repellent microcapsules is about 0.01 to 0.5% by weight based on the weight of the film / nonwoven laminate.

The liquid-impermeable backsheet in the form of a film or nonwoven fabric comprising the insect repellent microcapsules containing one or more natural plant extracts according to the present invention, prepared as described above, is conventional with a liquid permeable topsheet and absorbent core known in the art. It can be applied to disposable absorbent articles.

Therefore, the liquid permeable top sheet in contact with the user's skin in use, an absorbent core positioned below the top sheet to absorb and diffuse the body fluid, a liquid impermeable back sheet located below the absorbent core, the liquid impermeable back Disposable absorbent articles to which the insect repellent microcapsules containing at least one natural plant extract are applied to the sheet are included in the scope of the present invention.

Disposable absorbent articles to which the insect repellent microcapsules according to the present invention can be applied are not limited thereto, but infant diapers (baby diaper), adult diapers (adult diaper), women's sanitary napkins, bowel training genus Panties, panty liners, and the like.

Topsheets usable in the present invention can be made from a wide variety of materials such as porous foams, reticulated foams, perforated plastic films, nonwovens, natural fibers, synthetic fibers or blends of natural and synthetic fibers. For example, the topsheet may consist of a spunbonded fibrous web of spunlace nonwovens or polyolefin fibers or a bonded carded web composed of natural and / or synthetic fibers. In this regard, the topsheet may be composed of a hydrophobic material treated with a surfactant or otherwise treated to impart the desired level of wettability and liquid permeability. Examples of topsheets are described in US Pat. No. 5,879,343, US Pat. No. 5,490,846, US Pat. No. 5,364,382, and US Patent Application No. 09 / 209,177, which are incorporated herein by reference.

Absorbent cores usable in the present invention may include one or more absorbents such as superabsorbent particles, wood pulp fluff fibers, synthetic weed pulp fibers, synthetic fibers, and combinations thereof. The absorbent core can be of various shapes, the size of which depends on the desired absorbent capacity, the desired use of the absorbent article, and other factors known to those skilled in the art.

Hereinafter, the present invention will be described in more detail with reference to Examples. These examples are only for illustrating the present invention more specifically, it will be apparent to those skilled in the art that the scope of the present invention is not limited by these examples in accordance with the gist of the present invention.

Example

Example 1: Preparation of insect repellent microcapsules

To prepare insect repellent microcapsules of cinnamon and rosemary extract, cinnamon extract (CAS No 8015-91-6 Cinnamon Bark Oil, Trinity), rosemary extract (CAS No. 8000-25-7 Rosemary Oil, Trinity), respectively; These mixtures were dissolved in a hydrocarbon solvent, diluted, and then anionic surfactants were used as emulsifiers, and stirred at 2,000 to 3,000 rpm for 5 to 10 minutes using a homomixer to prepare micronized emulsions. Melamine, formaldehyde and water were mixed in a constant ratio, the pH was adjusted to neutral and stirred at an appropriate temperature to prepare a prepolymerization solution. Acetic acid was added to the prepolymerization solution and the microdispersion emulsion as a weakly acidic additive of 0.1 to 5% relative to the emulsion, and then the polymerization was performed while stirring at an appropriate temperature for 100 to 300 minutes. After cooling to room temperature, a certain amount of ammonia was added to remove residual formaldehyde and stirred for 1 hour or more. From this, insect-proof microcapsules of cinnamon extract, rosemary extract and mixtures thereof having an average particle size of 1 to 10 µm were obtained.

Example 2: Preparation of disposable absorbent articles to which insect repellent microcapsules were applied 1

Insect repellent microcapsules of the cinnamon extract, rosemary extract and the mixture prepared in Example 1, respectively, 10%, low-density polyethylene 40% and filler 50% (calcium carbonate) was mixed to prepare a repellent microcapsule-containing masterbatch T The film was prepared by casting at about 200 ° C. through a die. The film thus prepared was shortened and stretched at an elongation rate of about 200% to 300% at an elongation temperature of about 40 ° C. to prepare a film for breathable backsheet. Using the film thus prepared as a back sheet to prepare a disposable diaper according to a conventional method.

Example 3: Preparation of disposable absorbent articles to which insect repellent microcapsules were applied

Insect repellent microcapsules containing 10% and polypropylene 90% of the cinnamon extract, rosemary extract and a mixture thereof prepared in Example 1 were prepared by mixing the insect repellent microcapsules containing a masterbatch ratio of 1:99 with polypropylene Mixing with a spinning yarn through a fiber spinning device to prepare a yarn containing insect repellent microcapsules. A nonwoven fabric was manufactured through a nonwoven fabric forming apparatus using the prepared yarn, and a disposable diaper was manufactured according to a conventional method using the nonwoven fabric thus prepared as a back sheet.

Example 4 Insect Repellent Effect of Disposable Absorbent Articles Applied with Insect Repellent Microcapsules

In order to confirm the insect repellent effect of the disposable diaper applied to the insect repellent microcapsules containing cinnamon extract, rosemary extract, and mixtures thereof prepared in Examples 2 and 3, the following experiment was performed.

First, as a disposable diaper and a control applied to the insect repellent microcapsules containing the cinnamon extract (CIN), rosemary extract (R), and a mixture (RC) in four high-density pest space (40 × 30 × 40 cm) made of acrylic Disposable diapers (CON), each of which was not applied to the insect repellent microcapsules, were loaded and 500 worms of four-week-old Gallery Moth larvae were injected ( FIG. 1 ). At this time, the disposable diaper to which the insect repellent microcapsules were applied comprises a backsheet prepared according to the method of Example 4, the temperature inside the high density pest space was maintained at 28 ℃, relative humidity of 70 to 75%. After the larvae were introduced, the number of larvae attracted to each diaper was examined for 30 days every 24 hours, and the results were statistically analyzed by ANOVA test.

CIN R RC CON inside 0.292 ± 0.550A 0.708 ± 0.999AB 3.666 ± 2.254C Out 3.458 ± 1.865A 5.458 ± 3.230B 4.292 ± 2.216AB Sum 3.750 ± 1.939A 6.167 ± 3.130B 3.611 ± 1.914A 7.958 ± 3.277BC

As shown in Table 1 , the number of larvae attracted both inside and outside of the product is statistically significant in the disposable diaper applied to the insect repellent microcapsules containing the rosemary extract, cinnamon extract and mixtures thereof according to the present invention It can be seen that less. In the above, A, B, AB, C and BC grouped the results having statistically the same meaning as a separate group, group A has less number of larvae penetrating the disposable absorbent article than group B, group B than group C. The AB group represents the median of the A and B groups, and the BC group represents the median of the B and C groups.

From the above results, the disposable absorbent article according to the present invention is applied to the interior of the product which may occur during the distribution and storage of the product by applying the microcapsules containing the plant extracts, which are harmless to the human body, which naturally show the insect repellent effect. It was confirmed that it can effectively block pest influx.

The specific parts of the present invention have been described in detail, and it is apparent to those skilled in the art that such specific descriptions are merely preferred embodiments, and thus the scope of the present invention is not limited thereto. something to do. Thus, the substantial scope of the present invention will be defined by the appended claims and their equivalents.

1 is a test of the insect repellent effect of the disposable diaper applied microcapsules of natural plant extracts according to the present invention.

Claims (8)

  1. In a disposable absorbent article comprising a liquid permeable topsheet, an absorbent core, and a liquid impermeable backsheet, the insect repellent microcapsules microencapsulating a natural plant extract exhibiting insect repellent properties include a thermoplastic polymer forming a backsheet matrix and the insect repellent microcapsule. A film prepared by casting a masterbatch including a capsule at 170 to 240 ° C. through a T-die and then passing it through a cooling roll; Alternatively, the masterbatch including the thermoplastic polymer and the insect repellent microcapsules is manufactured on a non-woven fabric forming apparatus using a non-woven fabric forming apparatus after manufacturing the insect repellent microcapsule-containing yarn by using a fiber spinning device, and the insect repellent microcapsules of The average particle size is 1 to 10 μm, the insecticide microcapsules contain 5 to 30% by weight of the natural plant extracts relative to the total weight of the microcapsules, and the insecticide microcapsules contain 0.0006 to 0.03 to the total weight of the disposable absorbent article. Disposable absorbent articles comprising by weight.
  2. The method of claim 1,
    Disposable absorbent article, characterized in that the natural plant is at least one member selected from the group consisting of cinnamon, rosemary, lavender, mint and eucalyptus.
  3. delete
  4. delete
  5. delete
  6. delete
  7. The method of claim 1,
    Disposable absorbent article, characterized in that the backsheet comprises 0.01 to 0.5% by weight of insecticide microcapsules relative to the total weight of the backsheet.
  8. The method of claim 1,
    Disposable absorbent articles are disposable absorbent articles comprising a disposable diaper for infants, adult diapers for adults, sanitary napkins for women, training pants and panty liners goods.
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JP2012504606A JP5411349B2 (en) 2009-04-06 2010-04-06 Absorbent article containing encapsulated plant extract showing insect repellent effect
PCT/KR2010/002100 WO2010117191A2 (en) 2009-04-06 2010-04-06 Absorbent article comprising an encapsulated plant extract exhibiting an insecticidal effect
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CN102387819B (en) 2015-02-18

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