JP2012087428A - Antibacterial feather and method for producing the same - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide an antibacterial feather that sustains an antibacterial property of polyphenol by using a material safe for a human body and an environment.SOLUTION: The method for producing an antibacterial feather includes a pretreatment for bringing a feather into contact with hydrolyzed keratin, and a polyphenol processing for bringing the pretreated feather into contact with polyphenol. The antibacterial feather has hydrolyzed keratin penetrating inside the feather, and polyphenol supported inside and/or on the surface of the feather by the hydrolyzed keratin.

Description

  The present invention relates to an antibacterial feather using polyphenol and a method for producing the same, and in particular, the functionality of polyphenol, which is a natural antibacterial component such as catechin contained in green tea, is imparted using a material that is highly safe to the human body. The present invention relates to an antibacterial feather and a method for producing the same.

  Methods for imparting antibacterial properties to protein fibers such as feathers have been studied. As conventional techniques, 1) a method using an organic synthetic antibacterial agent such as a quaternary ammonium salt (see Patent Document 1 below), 2) chlorine Treatment and a method of using a polyamide epichlorohydrin resin together (see Patent Document 2 below), 3) a method using a metal such as cobalt (see Patent Document 3 below), 4) a method of applying an animal antibacterial agent such as chitosan (Patent Document below) Reference 4). However, in recent years, air pollution and water pollution have become a problem, and it has become desirable to deal with skin irritation and allergies. As a new method, 5) a method of enclosing ozone in a duvet (the following patent) Document 5), 6) A processing method (see Patent Document 6 below) for improving functionality (texture and antibacterial properties) by fixing tea polyphenol to feathers using a binder has been found.

Japanese Patent Laid-Open No. 7-80166 JP 2003-306873 A JP-A-6-184937 Japanese Patent Laid-Open No. 11-43866 Japanese Patent Laid-Open No. 7-50970 JP 2001-123376 A

  However, the above method 5) introduces an antibacterial component into the product while finishing a sewing product with feathers as a batting, so it does not impart antibacterial properties to individual feathers, and the antibacterial effect is sustained. This is only for a relatively short period in which unstable antibacterial components remain, and it cannot be expected that the effect will last. In the method 6), since a quaternary ammonium salt is used as a binder used for fixing the tea polyphenol, there are concerns in terms of safety to the environment and the human body.

  For this reason, it is necessary to find a feather antibacterial treatment method that can be expected to maintain the antibacterial effect without causing a problem with respect to the environment and the safety to the human body.

  It is an object of the present invention to provide an antibacterial feather that is highly safe for the environment and the human body and can be expected to have a sustained antibacterial effect.

  The present invention also provides an antibacterial feather processing method capable of efficiently supplying antibacterial feathers that are highly safe and can be expected to have a sustained antibacterial effect, depending on materials and processing conditions that are highly safe to the environment and the human body, and It is to provide a method for producing antibacterial feathers.

  In order to solve the above-mentioned problems, a study on highly safe processing capable of carrying antibacterial components on feathers so that the antibacterial effect can be continued was carried out, and hydrolyzed keratin was used as a mordant aid to make feathers into polyphenols. By processing, it discovered that the antibacterial property with high safety | security and durability could be provided to a feather, and came to implement | achieve this invention.

  According to one aspect of the present invention, a method for producing an antibacterial feather includes a pretreatment for bringing a feather into contact with hydrolyzed keratin, and a polyphenol processing for bringing the pretreated feather into contact with polyphenol. To do.

  By the above-described method for producing antibacterial feathers, antibacterial feathers having hydrolyzed keratin that penetrates the feathers and polyphenols on the feather surface are produced.

  According to another aspect of the present invention, the antibacterial feather has hydrolyzed keratin penetrating into the feather and polyphenol supported on the inside and / or surface of the feather by the hydrolyzed keratin. .

  According to the present invention, protein fibers can be produced using materials that are highly safe for the environment and the human body without using binder resins, industrial metal salts, cationic synthetic polymers and the like that have been conventionally used for antibacterial processing. A polyphenol-processed feather can be provided which can be antibacterial by being processed with polyphenol, and has a long-lasting antibacterial property. There is little load on the environment such as water pollution, and it is possible to produce highly safe polyphenol-processed feathers while taking advantage of the functionality of polyphenols. Since antibacterial feathers excellent in fastness such as washing resistance can be provided, it is useful for developing applications of feather products utilizing the functionality of polyphenols.

  Since polyphenol compounds such as catechins contained in green tea and the like are functional components having useful functions such as antibacterial properties and deodorization, their use for imparting these functions to various products has been studied. A polyphenol compound is a compound having hydrophilicity due to a hydroxyl group. However, since animal protein fibers such as feathers are not well-adapted to water, the polyphenol compound cannot be supported on the feather surface even if the polyphenol compound is simply brought into contact with the feathers. For this reason, the process for couple | bonding hydrophilic polyphenol with a feather is needed.

  In the present invention, hydrolyzed keratin is used as a treating agent for carrying polyphenol on the feathers in order to avoid the use of a substance that may cause a load on the human body or the environment. Hydrolyzed keratin is a hydrolyzate of keratin, which is a protein component that forms animal hair such as feathers and wool, skin, and nails, and has permeability to keratin such as feathers. Hereafter, the manufacturing method of the antibacterial feather of this invention is demonstrated in detail.

  The antibacterial feather manufacturing method of the present invention comprises a pretreatment in which a feather is brought into contact with hydrolyzed keratin to infiltrate the hydrolyzed keratin into the irregularities or gaps of the feather, and the pretreated feather is brought into contact with polyphenol to produce polyphenol. And polyphenol processing that imparts antibacterial properties to feathers. By performing the pretreatment using hydrolyzed keratin, hydrolyzed keratin acts as a binder or mordant aid, and the antibacterial property imparted to the feathers is highly durable.

  The feathers used include waterfowl feathers such as white down, white feather, gray down, and gray feather, and the shape and color tone are not limited. Pretreatment and polyphenol processing are performed in advance using the raw wool after washing and removing foreign matters and dirt.

  Hydrolyzed keratin is obtained by partially hydrolyzing a keratin raw material into a peptide state by using acid, alkali or enzyme or a combination thereof (for example, the method described in JP-A-2008-280326) In general, it is marketed as a polypeptide product having a molecular weight of about 300 to 1000. That is, hydrolyzed keratin can be considered as low molecular weight keratin and has permeability to keratin such as feathers. In the present invention, the hydrolyzed keratin may be prepared from a keratin raw material or a commercially available product, but can be prepared using waste feathers discharged from a feather washing factory, and such waste material. Is advantageous in reducing waste disposal costs and raw material costs.

  When preparing hydrolyzed keratin, the keratin raw material may be a protein material containing keratin. For example, human hair, animal hair such as sheep, horse, yak and cow, and feathers of birds such as chicken and duck You can also use nails, livestock horns, hoofs, etc. Furthermore, processed products using these, for example, feather bedding such as a duvet, clothing, wool fabric, and waste materials thereof can also be used. The method for preparing the keratin hydrolyzate is not particularly limited, and can be prepared by a known method. For example, as described above, a method of solubilizing using an acid, an alkali, a peroxide or the like And a method of degrading using a protein denaturant or an enzyme under reducing conditions (for example, Japanese Patent Application Laid-Open No. 2005-247692, Japanese Patent Application Laid-Open No. 2006-124341, Japanese Patent Application Laid-Open No. 2008-247925, and Japanese Patent Application Laid-Open No. 6-116300). See). Furthermore, hydrolyzed keratin derivatives can also be used, for example, silylated derivatives with silicon compounds, cationized derivatives with quaternary ammonium salts, acylated derivatives with fatty acids and the like.

  Waterfowl feathers and wool differ in the composition amino acid composition of keratin, so the composition of hydrolyzed keratin also differs depending on the keratin raw material. Specifically, hydrolyzed keratin derived from waterfowl feathers has a ratio of hydrophilic amino acid to hydrophobic amino acid in the amino acid constituting the polypeptide of about 1: 1.3, and is more hydrophobic than hydrolyzed keratin derived from wool. The ratio is high. In the present invention, any hydrolyzed keratin can be used, and it can be appropriately prepared from keratin raw materials or selected from commercially available products. From the viewpoint of familiarity with feathers, hydrolyzed keratin derived from feathers Is preferred. In order to suitably fix the polyphenol on the feather, hydrolyzed keratin having a polypeptide molecular weight of about 300 to 1000 is preferable.

  Hydrolyzed keratin is an anionic water-soluble substance in the neutral range, and when the feather is brought into contact with an aqueous solution of hydrolyzed keratin, the hydrolyzed keratin permeates the feather keratin. Therefore, in the pretreatment, clean feather wool is immersed in an aqueous solution of hydrolyzed keratin so that the feather and hydrolyzed keratin are sufficiently brought into contact with each other. As a result, the hydrolyzed keratin that has permeated the inside becomes a state that can act as a binder that binds the feather and the hydrophilic substance. The amount of hydrolyzed keratin used at this time may be adjusted so that the ratio with respect to feathers is about 0.01 to 10% by mass, preferably 0.5 to 3.0% by mass. It is preferably about 3 g / L from the viewpoint of permeability. The temperature of the liquid should be about 10 to 95 ° C., preferably about 35 to 80 ° C. and held for about 3 to 60 minutes, preferably about 10 minutes, so that hydrolyzed keratin is suitable for the feathers. To penetrate.

  In polyphenol processing, antiphenol is imparted to feathers using polyphenol. That is, the feather penetrated by the hydrolyzed keratin is brought into contact with the polyphenol, and the polyphenol is fixed inside and / or on the surface of the feather through the hydrolyzed keratin. In the present invention, tea polyphenols containing catechins and the like, which are natural antibacterial components contained in tea, are used. However, the present invention is not limited thereto, and other natural polyphenols can be used, and can be used alone or in combination as appropriate. it can. The polyphenol may be supplied to the feathers in the state of an aqueous liquid. The polyphenol is supported in contact with the hydrolyzed keratin that has permeated the feathers by immersing the feathers in the aqueous liquid. In order to eliminate the influence of the hydrolyzed keratin surplus in the pretreatment, the polyphenol processing is preferably performed by removing the hydrolyzed keratin aqueous solution used in the pretreatment from the feathers, for example, a dye bath after the pretreatment. The hydrolyzed keratin aqueous solution may be discharged from the water, and the feathers may be immersed in an aqueous liquid containing polyphenol, or the pretreated feathers may be immersed in fresh water and added with polyphenol. The amount of polyphenol used should be adjusted so that the ratio to the feathers is about 0.1 to 5% by mass, and the concentration of the aqueous liquid is about 0.02 to 5 g / L as antibacterial and cleanliness. From the point of view, it is preferable. The polyphenol material can be used by appropriately selecting from polyphenol products provided on the market, or a product extracted from a raw material containing polyphenol such as a tea beverage extracted from tea leaves may be used. Feathers are not easy to remove if they get entangled with impurities, and it is necessary to increase the number of treatments such as washing to remove impurities and increase the cleanliness of the feathers. Is preferred. In this regard, the tea catechin preparation provided as Teafuran 90S (trade name, manufactured by ITO EN Co., Ltd.) has a polyphenol concentration of 90% by mass or more and has very few impurities compared to other commercially available products. It is extremely advantageous for use in the above.

  In the polyphenol processing, the aqueous polyphenol solution brought into contact with the feather is heated to about 35 to 95 ° C., preferably about 50 to 80 ° C. in the pH range from about 3 to 11, preferably from about pH 4 to 7, in the vicinity of neutrality. For about 5 to 60 minutes. Thereby, polyphenol is suitably carry | supported by the inside and surface of a feather by the hydrolyzed keratin which penetrate | invaded the fine unevenness | corrugation and space | gap of the feather. Although polyphenol has an anionic hydroxyl group, it is considered that the hydroxyl group of polyphenol supported on feathers is in a state associated with the cationic amino group of hydrolyzed keratin.

  Feathers that have undergone polyphenol processing are removed from the aqueous polyphenol solution and washed with water as appropriate to remove excess polyphenol.

  Hydrolyzed keratin penetrates easily into feather keratin, but it is also easy for the penetrated hydrolyzed keratin to be detached from the keratin. Therefore, the hydrolyzed keratin that has penetrated into the keratin material may leak out in the water washing after the polyphenol processing. In this regard, the change in the state of the hydrolyzed keratin due to the pH can be effectively used for suppressing the elimination of the hydrolyzed keratin. More specifically, hydrolyzed keratin, like other protein hydrolysates, undergoes a state change depending on pH due to the functional group of the constituent amino acid, and is an anionic water-soluble substance in the neutral range, but pH 4 In the acidic region below the extent, it aggregates instantly and changes to poorly water-soluble, and becomes polymerized after aggregation and the molecular weight increases. Therefore, by adjusting the feathers infiltrated with hydrolyzed keratin in the vicinity of the neutral region to pH 3-4 after contact with polyphenol, the hydrolyzed keratin is agglomerated and polymerized, and it is difficult to separate from the feathers. To do. Therefore, it is preferable that the feather after polyphenol processing is once adjusted to an acidic pH before washing with water as a fixing process. In this regard, since polyphenol itself exhibits weak acidity due to the phenol group, it is easy to aggregate hydrolyzed keratin. Moreover, since the molecular weight of keratin can be increased by adsorbing a cation to hydrolyzed keratin, it may be difficult to desorb permeated hydrolyzed keratin using this.

  The water quality of factory water and the like may vary, but if the pH condition of the water used in the above operation varies, the processing state will be affected. Therefore, it is preferable to appropriately check the pH of the water to be used and adjust the pH appropriately using citric acid, sodium citrate, sodium bicarbonate, or the like as necessary.

  As described above, feathers that have been subjected to pretreatment, polyphenol processing, and water washing can be provided as feathers with antibacterial properties due to polyphenols by removing moisture by dehydration, drying, or the like. Note that hydrolyzed keratin is an anionic substance in the neutral range, and therefore has a property of easily binding to a cationic substance. Therefore, polyphenol processing becomes difficult when it comes into contact with cations before polyphenol processing.

  In the pretreatment using hydrolyzed keratin, there is little change in the hue of the feathers due to the treatment, and the feathers after polyphenol processing have less bleeding of the polyphenol component due to water wetting, etc. Is suitably maintained, and the cleanliness is kept good. In addition, the polyphenol is stably supported on the feather and the fastness to washing is also good.

  In the present invention, hydrophilic polyphenols are preferably carried on feathers that are easy to play water, and the function of polyphenols can be maintained on the feathers for a long time. Therefore, various products using feathers have antibacterial and deodorant properties. It is possible to provide a high-quality product by imparting polyphenol functions such as safety and antioxidant properties.

  According to the following procedures, feathers were treated with polyphenol or an antibacterial agent to produce processed feathers, and antibacterial washing fastness, presence or absence of color change of polyphenol, and cleanliness were examined. The results are shown in Table 1.

(Sample 1)
1 kg of white down from which dirt and the like had been removed by washing in advance was immersed in about 20 L of water in a dye bath and sufficiently impregnated with water. To this, 10 g of feather-derived hydrolyzed keratin powder (trade name: Keratide, manufactured by Toyo Feather Industries Co., Ltd.) was added and stirred at 40 ° C. for 10 minutes. Thereafter, the water in the dye bath was discharged, and fresh water was added to adjust the amount of the dye bath to 20 L. To this, 3 g of tea catechin (trade name: Theafuran 90S, manufactured by ITO EN Co., Ltd.) was added as a polyphenol, the water in the dye bath was heated to 60 ° C., and the temperature was maintained and stirred for 5 minutes. The feathers were sufficiently immersed in the catechin solution by standing for 60 minutes. Thereafter, the water in the dye bath was discharged and washed thoroughly with running water, and then the feathers were taken out, dehydrated and dried to obtain polyphenol-processed feathers.

(Sample 2)
1 kg of white down from which dirt and the like had been removed by washing in advance was immersed in about 20 L of water in a dye bath and sufficiently impregnated with water. To this, 10 g of hydrolyzed keratin solution derived from wool (trade name: Promois, manufactured by Seiwa Kasei Co., Ltd.) was added and stirred at 40 ° C. for 10 minutes. Thereafter, the water in the dye bath was discharged, and fresh water was added to adjust the amount of the dye bath to 20 L. To this, 3 g of tea catechin (trade name: Theafuran 90S, manufactured by ITO EN Co., Ltd.) was added as a polyphenol, the water in the dye bath was heated to 60 ° C., and the temperature was maintained and stirred for 5 minutes. The feathers were sufficiently immersed in the catechin solution by standing for 60 minutes. Thereafter, the water in the dye bath was discharged and washed thoroughly with running water, and then the feathers were taken out, dehydrated and dried to obtain polyphenol-processed feathers.

(Sample 3)
1 kg of white down from which dirt and the like had been removed by washing in advance was immersed in about 15 L of water in a dyeing bath and sufficiently impregnated with water. To this was added 100 g of a cationic agent (trade name: Cationone KCN, quaternary ammonium salt manufactured by Yushi Co., Ltd.) and stirred for 10 minutes. Further, an aqueous sodium hydroxide solution (concentration: about 20 g / L) was prepared and added to the dye bath, and stirred for 10 minutes. Then, add about 3 L of water to adjust the dye bath volume to 20 L, heat the dye bath water to 80 ° C., maintain the temperature and stir for 30 minutes while fully immersing the feathers. did. Thereafter, the water in the dye bath was discharged, and the washing water was discharged while sufficiently washing with running water and neutralizing to obtain cationized feathers.

  About 15 L of water was poured into the cationized feathers in the dye bath and immersed. 5 g of tea catechin (trade name: Theafranc 30F, manufactured by ITO EN Co., Ltd.) was dissolved in about 1 L of water and poured into the dye bath, and water was added to adjust the liquid volume of the dye bath to 20 L. This was heated up to 30 ° C., and the feathers were sufficiently immersed while stirring for 20 minutes while maintaining the temperature. Thereafter, the dye bath was discharged, the feathers were carefully washed with running water, the feathers were taken out, dehydrated and dried to obtain polyphenol-processed feathers.

(Sample 4)
1 kg of white down from which dirt and the like had been removed by washing in advance was immersed in about 20 L of water in a dye bath and sufficiently impregnated with water. To this, 10 g of copper acetate was added as a metal antibacterial agent, heated to 80 ° C., maintained at the temperature and stirred for 5 minutes, and then the feathers were sufficiently immersed while standing for 60 minutes. Thereafter, the water in the dye bath was discharged, washed thoroughly with running water, the feathers were taken out, dehydrated, and dried to obtain copper ion processed feathers.

(Sample 5)
1 kg of white down from which dirt and the like had been removed by washing in advance was immersed in about 20 L of water in a dye bath and sufficiently impregnated with water. To this was added 50 g of a polymer cation agent (trade name: SX-1, manufactured by Takamatsu Yushi Co., Ltd.) as an organic antibacterial agent, heated to 80 ° C., and maintained for 5 minutes while stirring. The feathers were sufficiently immersed while allowed to stand for 60 minutes. Thereafter, the water in the dye bath was discharged, washed thoroughly with running water, the feathers were taken out, dehydrated and dried to obtain organic antibacterial feathers.

(Antibacterial wash fastness)
The processed feathers were washed three times according to the provisions of JIS L0217 103, and the antibacterial properties of the processed feathers before and after washing (the bacteriostatic activity value in the bacterial liquid absorption method using JIS L1902 Staphylococcus aureus) were measured.

(Hue change)
The hue change before and after processing of feathers was visually observed. The hue of the feather should be close to the white color of the original feather.

(Cleanliness)
Four test samples of 3.0 ± 0.1 g were separated from the processed feather samples, and the following operations were performed for each test sample.

  The test portion was placed in an Erlenmeyer flask with a stopper, 100 ml of distilled water was added, and the mixture was stirred until the feathers were sufficiently wet. Further, 200 ml of distilled water was added, and the feathers were sufficiently immersed in water after stirring, and then shaken for 45 minutes using a shaker. Thereafter, the contents of the flask were filtered with a filter to obtain a filtrate.

  The two filtrates for the four tests obtained above were combined into two measurement solutions. Put each measuring solution into the see-through part on the sign board of the fluorometer according to JIS K0102, see through the measuring solution from the top, and check whether the double cross pattern on the sign plate can be recognized through the measuring solution The measurement solution was discharged until the pattern was recognized. The depth of the measurement liquid remaining in the fluoroscopic part was measured with a scale of a fluorometer. The average value (unit: mm) of the numerical values of the depths measured with the fluorometer for the two measuring solutions is calculated and shown in Table 1 as the cleanliness of the processed feathers.

(Table 1)
Antibacterial properties, hue change and cleanliness of processed feathers
Antibacterial
Before washing After washing Hue change Cleanliness Original feather 0.0 0.0 White sample 1>4.1> 4.1 Light beige> 500
Sample 2 1.6 2.0 Light beige> 500
Sample 3 2.9 1.2 Brown 500
Sample 4 0.6 0.0 Blue> 500
Sample 5 0.0 0.0 White> 500

  As is clear from Table 1, Samples 1 and 2 subjected to polyphenol processing after pretreatment using hydrolyzed keratin retain antibacterial properties even after washing, but samples subjected to polyphenol processing after cation treatment 3 clearly shows that the antibacterial property is lowered and the washing durability is inferior. In samples 4 and 5 using a metal antibacterial agent or an organic antibacterial agent, antibacterial properties are hardly imparted.

  As for the hue change, although the hue changes of the samples 1 and 2 are small, the samples 3 and 4 are clearly discolored. Sample 5 does not show discoloration, but is considered to be because the treatment with the antibacterial agent is not effective.

  Thus, the pretreatment using hydrolyzed keratin allows the polyphenol to adhere well to the feathers, exhibits antibacterial properties having wash fastness, and provides feathers with high cleanliness and stable hue. Because it uses hydrolyzed keratin, it maintains safety for the body and the environment.

  Using a material that is safe for the human body and the environment, the function of polyphenol can be added to the feathers and the washing fastness of polyphenol processing can be improved, so bedding such as comforters, mattresses, pillows, beds, jackets, vests, Pants, gloves, hats, mufflers, socks, boots, slippers and other clothing and clothing, sofas, cushions, chairs, curtains, and other furniture, laps, bags, warming covers, etc. It can be widely applied to provide a high-quality product, and the use development of the product utilizing the functionality of polyphenol can be promoted. Therefore, it is useful for the spread of polyphenol processed feather products.

Claims (6)

  A method for producing antibacterial feathers, comprising: pretreatment of bringing feathers into contact with hydrolyzed keratin; and polyphenol processing of bringing feathers subjected to the pretreatment into contact with polyphenols.   The method for producing antibacterial feathers according to claim 1, wherein the pretreatment includes a step of preparing a hydrolyzed keratin aqueous solution and a step of immersing the feathers in the hydrolyzed keratin aqueous solution.   The said polyphenol process is a manufacturing method of the antibacterial feather of Claim 1 or 2 which has the process of preparing a polyphenol containing aqueous liquid, and the process of immersing a feather in a polyphenol containing aqueous liquid.   The method for producing antibacterial feathers according to any one of claims 1 to 3, wherein the polyphenol contains tea catechins.   An antibacterial feather produced by the method for producing an antibacterial feather according to any one of claims 1 to 4, and comprising hydrolyzed keratin penetrating into the feather and polyphenol inside and / or on the surface of the feather.   An antibacterial feather having hydrolyzed keratin penetrating into the inside of the feather and polyphenol supported on the inside and / or surface of the feather by the hydrolyzed keratin.