JP5052462B2 - Pollen allergen reduced wallpaper - Google Patents

Description

  The present invention relates to a technique in which a naturally-derived allergen-reducing functional agent is imparted to a naturally occurring wallpaper, sheet-like interior material such as candy.

  In recent years, with the increase in airtightness of houses, the so-called odor and house dust has become a house with a structure that tends to be trapped indoors. It is said that many symptoms of allergic diseases such as allergic rhinitis have developed.

  There are various types of allergens, including mites (parasites, carcasses, shells, feces), molds, pets (hair, dandruff), pollen, and the like, which are considered as the main causative agents of allergic diseases. As countermeasures against these allergens, methods are disclosed in which allergens are prevented from entering the room, allergens that have entered are removed, or inactivated.

  For example, deodorization, deodorization, and dust collection using an air conditioner, an air purifier, and the like are performed, and a method for collecting allergens in the air using a filter or the like has been proposed. However, these methods are effective for causative substances of allergic diseases floating in indoor air, but are not effective even for causative substances on the floor surface or wall surface.

  In addition, allergens such as mites (insects, carcasses, shells, feces), molds, pets (hair, dandruff) and the like often accumulate on the floor surface. An allergen-reducing substance is applied and an effective method for reducing various allergens that accumulate on the carpet is disclosed.

  Moreover, in patent document 2, ceramic soluble organic substance is created from soluble organic substances, such as catechin which has a deodorizing and antibacterial effect, and it mixes and uses it for the topcoat agent of the wallpaper which consists of Japanese paper, a vinyl chloride, a nonwoven fabric, etc. It discloses a technology that can be firmly fixed and have antibacterial and deodorizing effects over a long period of time.

JP 2008-54898 A JP 2003-13372 A

  However, the above method is not necessarily effective for allergens attached to wall coverings such as wallpaper. The present invention is based on the recent increase in nature-oriented thinking, and by applying astringency on the surface layer of the wallpaper made of natural materials, by simultaneously exhibiting antibacterial and deodorizing properties and allergen-reducing functions, In particular, an object of the present invention is to provide a wallpaper that exhibits an effective allergen-reducing function against pollen allergens that float in the air and enter the room and easily adhere to the wallpaper.

  The present invention provides the following means in order to achieve the above object.

  [1] In a wallpaper in which a surface layer is laminated on a base material layer, the base material layer is made of cellulosic fibers, the surface layer is made of a woven or knitted fabric made of natural fibers, and the surface layer is coated with astringency. Characteristic wallpaper.

[2] The wallpaper according to claim 1, wherein an application amount of the persimmon astringent wallpaper is 0.05 to 0.5 g / m ² .

  In the invention of [1], in the wallpaper composed of the base layer and the surface layer, the base layer is made of cellulosic fibers, and the surface layer is a woven or knitted fabric made of natural fibers. It is possible to make a wallpaper that makes use of the texture of natural materials. In addition, since the persimmon astringent is directly applied to the surface layer, a fray-preventing resin layer for the surface layer that has been conventionally applied is unnecessary, and the antibacterial performance and the allergen reducing function of the persimmon astringent can be demonstrated at the same time. Can do. Moreover, the persimmon astringency is particularly effective for pollen allergens that float in the air and enter the room, and can reduce the allergens that contact the wall by the air flow in the room.

In the invention of [2], the sticking amount of the persimmon astringent extract to the wallpaper is 0.05 to 0.5 g / m ² , so that it exhibits a sufficient allergen reducing function while keeping the texture of the natural material. be able to.

  The present invention will be described in more detail below. The present invention is a wallpaper comprising a base material layer and a surface layer, wherein the persimmon astringent is directly applied to the surface layer.

  For the base material layer, paper made of natural pulp or cellulose is preferably used. The base material layer is affixed to walls such as concrete and wooden boards via an adhesive, but it is difficult to release moisture and easily generates mold. Is preferred. In general, adhesives often contain a volatile organic solvent, and VOC (volatile organic compounds) are generated from the adhesive itself during use. No adhesive is preferred.

  A surface layer is laminated on the upper side of the base material layer. The surface layer is preferably a woven or knitted fabric made of natural fibers such as cotton, hemp, rayon, etc., coupled with astringent astringent material, which is a natural material. Adhesion between the base material layer and the surface layer may employ a method using an adhesive, but use of a volatile organic solvent for the adhesive is not preferable because VOC (volatile organic compound) is generated. In the present invention, a method in which a thermoplastic resin is inserted between the base material layer and the surface layer and heated and pressure-bonded is preferable as a method for suppressing the generation of VOC (volatile organic compound).

  Persimmon astringent is a reddish brown translucent liquid containing fermented sap obtained by crushing and squeezing the fruit of persimmon, containing a large amount of tannin and sibuol, and having an odor of acetic acid and butyric acid produced by fermentation. It has been used for a long time as an agent and a reinforcing agent for increasing strength. In recent research, it has been found that it is also used as a dye and paint, and has an action of reducing formaldehyde and reducing allergens (especially pollen allergens). Moreover, it is preferable to apply an odorless type of astringency from which odors have been removed to those used indoors as in the present invention.

The sticking amount of the persimmon to the wallpaper is preferably 0.05 to 0.5 g / m ² . If it is less than 0.05 g / m ² , a wallpaper having sufficient antibacterial / deodorant / allergen reducing functions cannot be obtained. Moreover, even if it applies exceeding 0.5 g / m < ² >, the effect commensurate with the increase in the amount of application is not obtained only by increasing the amount of application. A more preferable sticking amount of the persimmon astringent is 0.1 to 0.3 g / m ² .

  The method of applying the persimmon astringent wallpaper is not particularly limited, but a coating method can be exemplified. For example, gravure roll processing, spray processing, roll coater processing, jet printing processing, transfer printing processing, screen printing processing and the like can be mentioned. In addition, before the skin layer is laminated and integrated on the upper side of the base material layer, the skin layer may be immersed in astringent astringent solution, squeezed and then dried and bonded to the base material layer.

  Next, the present invention will be described specifically by way of examples. In addition, evaluation of each allergen reduction performance (inactivation performance) in an Example was performed as follows.

<Allergen reduction performance test>
Measure the ELISA sandwich method, read the absorbance of the generated chromogenic material with an absorptiometer, quantify the allergen amount in the sample from a standard curve created using a standard product with a known concentration, and reduce the allergen Was calculated and evaluated in the following four stages, and evaluations “1” and “2” were regarded as acceptable.
(Criteria)
“1” ・ ・ There is no allergen contamination. (Allergen reduction rate of 80% or more)
"2" ... Slightly contaminated with allergens. (Allergen reduction rate of 60% or more and less than 80%)
"3" ... contaminated with allergens. (Allergen reduction rate of 40% or more and less than 60%)
"4" ... Very contaminated with allergens. (Allergen reduction rate less than 40%)

<Example 1>
Using a kraft paper as the base material layer, a cotton cloth (a plain weave of No. 4 twin yarn) is dipped in a koji astringent solution diluted twice as a surface layer on top of it, and then squeezed and dried in a sun-dried cotton cloth. Overlaid on kraft paper sprayed with melt resin, overheated and adhered to obtain wallpaper. The sticking amount of the persimmon to the wallpaper surface layer was 0.3 g / m ² . The allergen-reducing wallpaper thus obtained has an allergen-reducing performance of “1”.

<Example 2>
A wallpaper was obtained in the same manner as in Example 1 except that the persimmon astringent solution was diluted 3 times in Example 1. The amount of sticking of the persimmon to the wallpaper surface layer was 0.2 g / m ² . The allergen-reducing wallpaper thus obtained had an allergen-reducing performance of “2”.

<Comparative Example 1>
In Example 1, a wallpaper was obtained in which no persimmon was attached to the cotton fabric. Of course, the amount of sticking to the wall surface of the wall paper was 0, and the allergen reduction performance was evaluated as “4”.

  The technology of the present invention is to inactivate pollen allergens by directly applying astringency to the skin layer of wallpaper, and the fields used are not limited to wallpaper, but are used for packages such as home appliances, accessories for interiors, vehicles, etc. Widely used for processing interior materials.

Claims (2)

  In the wallpaper in which the surface layer is laminated on the base material layer, the base material layer is made of cellulosic fibers, the surface layer is made of a woven or knitted fabric made of natural fibers, and the surface layer is coated with astringency. wallpaper. The wallpaper according to claim 1, wherein an application amount of the persimmon astringent wallpaper is 0.05 to 0.5 g / m ² .