KR960015183B1 - Disposable absorbent articles containing encapsulation materials - Google Patents

Abstract

The disposable absorbent article is composed of a liquid pervious top sheet, a liquid impervious back sheet, fluff pulp and 0.05-20 wt% one or more encapsulated materials selected from fragrance such as spearmint, peppermint or strawberry, pH controller such as citrate or phosphate, sterilizer such as grapefruit extract and skin protector such as bioceramic or zinc oxide. The capsule size is 10-20 Pm. The absorbent article can be used for disposable diaper, sanitary napkin or pantyliner. The capsulated materials function properly during urination, and the product is safe for slcin.

Description

            Disposable Absorbent Products Containing Encapsulated Material         

FIELD OF THE INVENTION The present invention relates to disposable absorbent articles, and more particularly to liquid permeable top sheets, liquid impermeable back sheets                 of encapsulated material by adding encapsulated material to a disposable absorbent product consisting of a sheet, fluff pulp, and the like.                 It relates to a disposable absorbent product which enhances the functional effect and has excellent skin safety.

In the present specification, the disposable absorbent product is a product that absorbs body fluids excreted by various physiological actions, that is, secretions of urine and feces,                 Refers to products that absorb menstrual and vaginal secretions, and more specifically, disposable diapers used by infants or adults                 diaper, sanitary napkin or pantyliner. The performance of the above disposable absorbent product is primarily                 Absorption rate and absorption rate of body fluid secreted by physiological action are importantly evaluated, but in the field of absorption and absorption rate, superabsorbent resin (super                 Many developments have been made with the development of absorbent polymers. The next performance to be absorbed can occur by using diapers to excrete body fluids.                 It should be a product that can effectively prevent diaper rash and diaper dermatitis.

Disposable absorbent products consisting of conventional liquid permeable top sheets, downy pulp, and liquid impermeable back sheets have a component of urinary stool after diuresis or wet with body fluids                 Or it is decomposed by microorganisms and enzymes present in the skin to produce ammonia, and skin irritation by ammonia produced as urea decomposition products                 Chemical and physical skin irritation due to its own raw materials are combined to cause diaper rash, red spots and skin inflammation.                 The root cause of diaper rash is hydration in the stratum corneum of the skin due to the moisture generated during body fluid excretion, continuous friction between the diaper and the skin, and microorganisms.                 It may be due to secondary infection.

Korean Patent Application Publication Nos. 86-8743 and 86-8744 disclose skin alkalis caused by ammonia by changing the pH by using inorganic acids or by containing acid functional moieties.                 It is suggested to prevent the phenomenon, but it is not effective in terms of skin safety. Another example is a fungicide synthesized by chemical synthesis                 Although treatment has been suggested, it is a significant amount of synthetic to kill superficial bacteria that directly or indirectly affect the skin while causing damage to the skin.                 The need for fungicides can cause further problems due to the irritant properties of synthetic fungicides added to prevent skin rashes.

The present invention is to solve the above problems of the prior art, a disposable disposable sheet consisting of a liquid permeable top sheet, fluffy pulp, liquid impermeable back sheet, etc.                 The addition of the encapsulated material to the absorbent product provides a disposable absorbent product with excellent skin safety while exhibiting the functional effect of the encapsulated material.

The present invention provides a disposable absorbent article composed of a liquid permeable topsheet, a liquid impermeable backsheet, fluffy pulp, and the like, wherein all or part of its components                 Disposable absorbent products comprising one or more encapsulated substances selected from fragrances, pH adjusters, fungicides and skin protectants.                 It is about.

The invention also relates to a liquid permeable topsheet, a liquid impermeable backsheet, to areas that are easy to contact with the skin in the manufacture of downy pulp or in the manufacture of disposable diapers.                 Disposable, characterized by adding one or more encapsulated substances selected from fragrances, pH adjusters, fungicides and skin protectants                 It relates to an absorbent product.

In the present invention, encapsulation is to make particles containing a core substance therein and a wall membrane on the outside thereof,                 The main components of the interior and the components of the wall can be selected in various ways depending on the purpose of encapsulation. The purpose of encapsulation, for example, is to (1) convert a liquid into a solid,                 To facilitate storage, (2) to isolate substances reacting with each other, (3) to control the rate of release of internal active ingredients, or (4) to produce an unpleasant taste or smell.                 Masking or (5) protecting unstable materials.

Encapsulation methods are already widely used in the pharmaceutical field to control the rate of release of internal active ingredients or                 Stability is secured so that it can have a continuous effect. The main components of the encapsulated material can be selected according to the purpose of use.                 However, it is preferable to use one or two or more of fragrances, pH adjusting agents, fungicides and skin protectants.

The fragrance used as the encapsulated material in the present invention acts as an indicator of masking and defecation of odor due to the discharge of urine and feces.                 Spearmint, peppermint or strawberry is preferably used. The pH adjuster acts as an alkali neutralizer by ammonia, preferably hydrochloric acid or phosphate.                 Used. Fungicides have a bactericidal action against pathogenic dermatophytes, and grapefruit extracts may be preferably used. Skin protectants have poor stability to the external environment                 It is preferable to use bioceramic or zinc oxide as a skin protective material.

The encapsulated material in the disposable absorbent article of the present invention preferably contains 0.05 to 20% by weight per total weight. Up to 0.05% by weight of encapsulated material                 If it is used, the effect is weak, and if it is more than 20% by weight, there is a fear that it may come out when using the product, and a great effect on the operation cannot be expected.

The capsule size of the encapsulated material in the disposable absorbent article of the present invention is preferably 10 to 20㎛, the wall component is dissolved by the water component of the urine and stool, the main component (encapsulated                 Material) must be functional. Wall material may be sucrose, dextrin, lecithin, silicon oxide, and other water-soluble substances.                 have.

Liquid permeable top sheets in the present invention are those used in conventional disposable absorbent articles, with nonwovens being generally used the most. Downy pulp is made from wood pulp                 Processed and made into fluff, it is a hydrophilic absorbent material that absorbs secretions and is used in disposable absorbent products of air passages. And liquid                 An impervious back sheet is also used in a conventional disposable absorbent product, and generally used is a non-breathable waterproof film, a breathable waterproof film and                 There is a biodegradable waterproof film, and a laminate of nonwoven fabric on such liquid impermeable backsheet may also be used.

In the present invention, as the cast product, conventional liquid permeable top sheets, fluffy pulp and liquid impermeable back sheets used in conventional disposable absorbent articles are used.                 Auxiliary compositions include (1) tissue, (2) adhesive tape or fastening buttons, and (3) frontal                 tape, (4) thigh or waist elastics, (5) barrier cuff, leg standing cuff, (6) adhesive                 melt, glue, etc.), and (7) system for fixing to underwear such as panties.

There may be several methods for adding the encapsulated material used in the present invention to a disposable absorbent article, and representative examples of such methods include (1) a liquid permeable top                 Method to be contained in a sheet, (2) Method to be contained in downy pulp, (3) Method to be included in a barrier cuff, (4)                 There is a method of incorporation into tissues, and (5) a method of incorporating the tissue into a disposable absorbent product.

The method of (1) to (5) above refers to the addition of encapsulated material in the preparation of each composition, and more specifically, a liquid already containing the encapsulated material.                 Disposable absorbent articles using permeable topsheets, downy pulp, coagulation bands, superabsorbent resins or tissues are also within the scope of the present invention. Normal disposable as described above                 When encapsulated materials are added to the absorbent product composition, encapsulated materials such as fragrances, pH adjusters, fungicides, skin protectants, etc. may be added to the water components of the infant during urination and defecation.                 As the wall material dissolves and the encapsulated material is exposed to the outside, it has a functional effect, and has excellent skin safety and prevents diaper rash and diaper dermatitis.                 Provides excellent effects on inhibition and prevention.

Hereinafter, the present invention will be described in more detail with reference to Examples and Comparative Examples, but the technical scope of the present invention is not limited to these Examples.

[Comparative Examples 1 to 3 and Examples 1 to 7]

Comparative Examples 1 to 3 and Examples 1 to 7 show various effects that may occur when wearing a disposable diaper containing fragrance, and include a liquid permeable top sheet,                 Conventional disposable diaper compositions prepared by fluffy pulp and liquid impervious bowel movement sheets prepared according to a conventional disposable diaper manufacturing method were referred to as Comparative Example 1. Conventional                 Unencapsulated fragrance in the disposable diaper composition may be contained in the liquid permeable topsheet at 0.5% and 1%, respectively, in a weight ratio to the total weight of the diaper.                 Diaper compositions prepared according to the diaper manufacturing method was called Comparative Examples 2 to 3.

In addition, the strawberry flavor encapsulated in the conventional disposable diaper composition is 0.05%, 0.1%, 0.5%, 1%, 5%,                 Disposable diaper composition of the present invention prepared according to a conventional disposable diaper manufacturing method by containing 10%, 20% in a liquid permeable top sheet Example 1 to                 7.

Comparative Examples 1 to 3 and Examples 1 to 7 were used directly for 2 weeks for 100 infants 3 to 12 months of age for two weeks to mask the effect of fecal odor                 The effect of marker function on defecation was investigated through a questionnaire and the incidence of diaper dermatitis was observed.

Table 1 below shows the masking effect of fecal odor and bowel movement after using the disposable diapers prepared from Comparative Examples 1 to 3 and Examples 1 to 7 for 24 hours.                 Percentages were obtained through the questionnaire for the effect of the labeling function.

As can be seen in Table 1, in Comparative Example 1 manufactured by a conventional disposable diaper composition, there was no masking effect of fecal odor and the display function at the time of bowel movement.                 The incidence of diaper dermatitis was 9%. In Comparative Examples 2 to 3, in which 0.5% and 1% of an unencapsulated term were added to a conventional disposable diaper composition, respectively, feces                 The masking effect of odor was 5 to 11%, and the function of marking function during bowel movement was about 2 to 5%, but the incidence of diaper rash was about 34 to 37%.                 Compared with Comparative Example 1 not added, the masking effect and the display function effect was good, but diaper rash occurred about 4 times more. This scented skin                 It is considered to be very irritating and accelerated the development of diaper dermatitis.

In contrast, in Examples 1 to 7 prepared by adding the encapsulated scent to the conventional disposable diaper composition, the masking effect of fecal odor is 4 to 52%, the indication when defecation                 The functional effect was 18-65% to suppress the bad smell when the fecal excretion of the infant and the infant was able to perceive effectively sensory when defecation. Comparative Examples 2 to 3 degrees                 Although it had some of these effects, it was found to be less effective than Examples 1 to 7, and thus the effect was more consistently strong when encapsulated.                 It is considered to be. In addition, the incidence of diaper dermatitis in Examples 1 to 7 was about 6 to 9%, similar to the incidence of Comparative Example 1, but in Comparative Examples 2 to 3                 In comparison, the decrease was considerably reduced. It is presumed that the incidence of diaper dermatitis has been slowed down since the fragrance is encapsulated and does not directly contact the skin.

[Comparative Examples 4 to 7 and Examples 8 to 13]

Comparative Examples 4 to 7 and Examples 8 to 13 show the change in pH after administration of citric acid (citric cid) in the urine, not encapsulated per 100 ml of urine                 1g, 5g, and 10g of citric acid, respectively, were referred to as Comparative Examples 5 to 7, and Comparative Example 4 measured the pH change without administering citric acid.                 In addition, after the administration of 0.5g, 1g, 2g, 5g, 10g, 15g of the encapsulated citric acid per 100ml of urine, the change in pH was measured Example 8                 13.

Comparative Examples 4 to 7 and Examples 8 to 13 measured the degree of change in pH of urine at intervals of 2 hours for 6 hours after citric acid administration, and for each Comparative Example and Example.                 Five samples were tested and averaged. The pH change value was obtained by subtracting the pH value immediately after the administration of citric acid from the pH value after 6 hours.                 Unified to 100 ml.

Table 2 shows the degree of pH change in urine after administration of encapsulated citric acid and encapsulated citric acid from Comparative Examples 4 to 7 and Examples 8 to 13.                 It is a table which measured and shown.

As can be seen in Table 2, in Comparative Examples 5 to 7 in which unencapsulated citric acid was administered, the pH change value was about 0.7 to 1.4 after initial administration of citric acid.                 A rapid decrease in pH appeared, but increased after 2 hours. However, in Examples 8-13 where encapsulated citric acid was administered,                 There was no rapid decrease after encapsulated citric acid administration, but the pH change ranged from 0.1 to 0.4.                 Did. In the case of Examples 8 to 13, the small pH change was continuously indicated that alkali was urinated due to the continuous action of citric acid encapsulated.                 It is presumably because it prevents.

[Comparative Examples 8 to 10 and Examples 14 to 19]

Comparative Examples 8 to 10 and Examples 14 to 19 show skin protection against diaper rash and diaper rash, which may appear when wearing disposable diapers.                 A conventional disposable diaper made of a liquid permeable top sheet, a fluffy pulp, a liquid impermeable back sheet, and manufactured according to a conventional disposable diaper manufacturing method.                 The composition was referred to as Comparative Example 8, and the zinc oxide encapsulated in the conventional disposable diaper composition was 0.05%, 0.1%,                 1%, 5%, 10%, 20% of the disposable diaper composition of the present invention to be contained in the liquid permeable top sheet prepared according to the conventional disposable diaper manufacturing method                 Examples 14-19.

Comparative Examples 9 to 10 each contain 0.5% and 1% liquid zinc oxide, which is not encapsulated in the conventional disposable diaper composition, in a weight ratio to the total weight of the disposable diaper, respectively.                 It was prepared according to the conventional method of manufacturing a disposable diaper to be contained in a permeable top sheet.

Comparative Examples 8 to 10 and Examples 14 to 19 were used for 1 month of directly targeting 100 infants aged 3 to 12 months, respectively, for diaper rash and diaper.                 The degree of dermatitis was investigated.

Table 3 below is a diaper by the inspector after using the disposable diapers prepared from Comparative Examples 8 to 10 and Examples 14 to 19 for one month for 24 hours.                 Table 5 shows the skin symptoms of the worn area.

[Judgement grade of skin symptom]

-0: no gross skin lesion

-1: weak bark

-2: medium bark

-3: moderate to bark and weak cracking

-4: severe bark and moderate cracking

As can be seen in Table 3 above, in Comparative Example 8 prepared by the conventional disposable diaper composition, the proportion of skin 0 grade was about 52%, compared to Comparative Example 8                 Comparative Examples 9 and 10, in which 0.5% and 1% of unencapsulated zinc oxide were added, respectively, have a skin protection effect of 65% and 68%, respectively.                 Appeared.

Examples 14 to 19 in which zinc oxide encapsulated in Comparative Example 8, which is a conventional disposable diaper composition compared to Comparative Examples 8 to 10, by concentration were added to                 The ratio was about 70 to 91%, which was excellent in preventing diaper rash and diaper rash, which may appear when wearing disposable diapers. Example 14                 Disposable diapers prepared by the above-described products 19 to 19 have excellent effects on the prevention of diaper rash and diaper dermatitis.                 It is estimated to form and reduce the action by contact which is a direct cause of diaper rash and diaper rash. It also acts on the surface of the skin and mucous membranes,                 Decreases and keeps the skin dry to prevent hydration and barking by body fluids, and zinc oxide is encapsulated to exert lasting effects                 It is estimated.

Claims (7)

In disposable absorbent products consisting of liquid-permeable topsheets, liquid-impermeable backsheets, downy pulp, etc., all or part of its components may contain fragrance,                 A disposable absorbent product, characterized in that it contains one or more encapsulated substances selected from pH adjusting agents, fungicides and skin protectants. The method of claim 1 wherein the fragrance is spearmint, peppermint or strawberry, the pH adjuster is citric acid or phosphate, the fungicide is a grapefruit extract and the skin protectant is                 Disposable absorbent product, characterized in that it is bioceramic or zinc oxide. The disposable absorbent article of claim 1 wherein the encapsulated material is fragrance, citric acid or zinc oxide. Disposable absorbent article according to any one of claims 1 to 3, characterized in that the encapsulated material contains from 0.05 to 20% by weight, The disposable absorbent article of claim 1 wherein the capsule size of the encapsulated material is 10-20 μm. 2. The disposable absorbent article of claim 1 wherein the disposable absorbent article is a disposable diaper, sanitary napkin, pantyliner.                 Product characterized in that. The method according to claim 1, wherein the liquid permeable top sheet, the liquid impermeable back sheet, the flexible pump, or the part which is easy to contact with the skin in the manufacture of a disposable diaper,                 Disposable absorbent product with the addition of encapsulated material.