JP2023061169A - Composition for mask processing and method for using the same - Google Patents

Abstract

To solve a problem of a case where functional powder drops from a mask even if a composition for mask processing containing functional powder is applied to the mask by spray or the like, and therefore an effect of a composition for mask processing cannot be obtained continuously.SOLUTION: A composition for mask processing of the present invention contains functional particles and dispersion medium having the average particle diameter of 0.1 μm to 20 μm. Further, a spray container containing the composition for mask processing includes the composition for mask processing of the present invention, and the spray container housing the composition.SELECTED DRAWING: Figure 1

Description

The present invention relates to masking compositions and methods of use thereof.

For the purpose of improving the mask function, a mask treatment composition has been developed which is applied to the mask by spraying or the like.

For example, Patent Literature 1 proposes a spray solution for imparting an anti-allergen function to a mask. Further, in Patent Document 2, as a spray solution for uniformly applying to the mask by spraying, a solvent such as water, alcohols, or a mixture thereof is added with 0.5% by mass to 2.0% by mass of cellulose. We provide a masking spray solution that contains nanofibers.

Patent Document 3 proposes a novel cell activator, specifically a cell activator containing a wavelength-converting substance as an active ingredient. The wavelength conversion substance used here converts the wavelength of ultraviolet light contained in incident light and emits output light having a wavelength longer than the wavelength of the ultraviolet light. It shows that skin cells can be activated by applying a wavelength-converting substance to the skin.

JP 2010-285402 A JP 2020-152755 A WO2020/204105

In recent years, as a countermeasure against infectious diseases such as influenza and COIVD-19, the opportunity to wear masks has increased, and since it is necessary for medical workers to wear masks on a daily basis, the functionality of masks Improvement is very important.

Therefore, the present inventors proposed a composition containing not only a liquid functional component but also a powdery functional component (functional powder) as a masking composition for improving mask functionality. I considered using it.

However, the inventors of the present invention have found that even if a mask treatment composition containing functional powder is applied to a mask by spraying or the like, the functional powder falls off from the mask due to friction, rubbing, or the like, resulting in mask treatment. It has been found that the effect of the composition for use may not be obtained continuously.

The present invention is intended to solve such problems.

The inventors of the present invention came up with the following invention as a result of earnest studies.

<Aspect 1>
A mask treatment composition containing functional particles having an average particle size of 0.1 μm to 20 μm and a dispersion medium.
<Aspect 2>
A composition according to aspect 1, which is for spraying.
<Aspect 3>
The composition according to aspect 1 or 2, which is for non-woven masks.
<Aspect 4>
The composition according to any one of aspects 1 to 3, wherein the functional particles are UV wavelength converting particles that receive UV light and emit light of a wavelength longer than the UV light.
<Aspect 5>
The composition according to aspect 4, wherein the ultraviolet wavelength-converting particles are at least one selected from the group consisting of zinc oxide phosphors, magnesium titanate phosphors, and calcium phosphate phosphors.
<Aspect 6>
The composition according to aspect 4 or 5, wherein the content of the ultraviolet absorber is 1.0% by mass or less.
<Aspect 7>
A composition according to any one of aspects 4 to 6, wherein the content of UV scattering particles is 1.0% by mass or less.
<Aspect 8>
The composition according to any one of claims 4 to 6, which is for cell activation.
<Aspect 9>
A spray container containing a masking composition, comprising the composition according to any one of aspects 1 to 8, and a spray container containing said composition.
<Aspect 10>
A method of using a mask treatment composition comprising spraying the composition according to any one of aspects 1 to 8 onto at least one of the inner and outer surfaces of a mask.

According to the masking composition of the present invention, the above problem, that is, even if the masking composition containing the functional powder is applied to the mask by spraying or the like, the functional powder is retained on the mask. It is possible to at least partially solve the problem that the masking composition may fall off without being worn, and as a result, the effect of the masking composition may not be obtained continuously.

FIG. 1 is a conceptual diagram when the mask treatment composition of the present invention is sprayed onto a non-woven fabric mask. FIG. 2 is a first conceptual diagram when a mask treatment composition different from the present invention is sprayed onto a non-woven mask. FIG. 3 is a second conceptual diagram when a mask treatment composition different from the present invention is sprayed onto a non-woven mask.

<Mask treatment composition>
The masking composition of the present invention contains functional particles having an average particle size of 0.1 μm to 20 μm and a dispersion medium.

The mask treating composition may be applied to the mask to treat the mask in any manner, and may be paintable or sprayable. When the mask treatment composition is sprayed onto the mask, the composition can be sprayed onto at least one of the inner and outer surfaces of the mask, particularly the inner surface of the mask. The functional particles may be suspended or sedimented in the dispersion medium. When the functional particles are sedimented, the mask treatment composition of the present invention is dispersed by shaking before use. is preferred.

The mask treatment composition of the present invention has a label indicating that it is a mask treatment composition, a label indicating that it is for use as a non-woven fabric mask, a label indicating that it is used by applying it to a mask, a label that it is used by spraying it on a mask, Housed in a package and/or container with a label indicating that the mask should be sprayed on the inner surface of the mask, a label indicating that the mask should be sprayed on the outer surface, and/or a label indicating that the mask should be shaken before use. be able to.

General masks are designed to capture at least bacteria with a size of about 0.1 μm to several μm, microparticles of PM2.5, etc. by a filter effect. For example, in JIS T9001:2021, as a quality standard for general-purpose masks related to microparticle capture efficiency (PFE) tests, the collection efficiency of true spherical polyethylene-based standard particles with a nominal particle size of 0.1 μm must be 95% or more. is demanding.

In addition to the filter layer for collecting fine particles, general masks also have an inner layer (mouth side layer) and an outer layer ( outer layer).

Therefore, according to the mask treatment composition of the present invention as described above, by containing functional particles having a specific particle size, the functional particles pass through the surface of the mask when sprayed onto the mask. By holding the functional particles inside the mask, it is possible to prevent the functional particles from coming off from the mask due to friction, rubbing, etc., thereby making it easier to hold the functional particles on the mask.

In particular, when the mask to be treated with the mask treatment composition is a general non-woven mask, that is, a non-woven mask having a three-layer structure of outer non-woven fabric/filter/inner non-woven fabric, the mask treatment composition of the present invention Depending on the material, at least a portion of the functional particles can pass through the outer nonwoven fabric or the inner nonwoven fabric and be retained on the filter. In general nonwoven fabric masks, spunbonded polypropylene nonwoven fabrics are used as the outer and inner nonwoven fabrics, and a meltblown polypropylene nonwoven fabric is used as the filter layer therebetween.

The case where the composition for mask treatment of the present invention is used by spraying it on a nonwoven fabric mask having a three-layer structure will be described with reference to FIGS. 1 to 3. FIG.

As shown in FIG. 1, when the mask treatment composition of the present invention is sprayed onto a non-woven mask 100 having a three-layer structure of outer non-woven fabric 20A/filter 30/inner non-woven fabric 20B, the sprayed composition is shown by an arrow 50. At least part of the functional particles 10A in the composition applied to the mask 100 pass through the inner nonwoven fabric 20B of the mask 100 and are retained in the filter 30.

On the other hand, as shown in FIG. 2, when the functional particles 10B contained in the mask treatment composition are too small, the functional particles 10B are not held by the filter 30 and tend to fall off the mask. turn into.

On the other hand, as shown in FIG. 3, if the functional particles 10C contained in the mask treatment composition are too large, the functional particles 10C cannot pass through the inner nonwoven fabric 20B and adhere to the outside of the mask. , it becomes easy to fall off from the mask due to friction, rubbing, etc.

(functional particles)
The functional particles used in the mask treatment composition of the present invention may be any particles that are preferably held by the mask and have an average particle size of 0.1 μm to 20 μm.

The particle size of the functional particles may be 0.3 μm or more, 0.5 μm or more, 1.0 μm or more, 2.0 μm or more, 3.0 μm or more, or 5.0 μm or more, and may be 18.0 μm or less, 15 μm or less. 0 μm or less, 12.0 μm or less, 10.0 μm or less, 5.0 μm or less, or 3.0 μm or less.

The particle diameter of the functional particles is determined by adding the particles to an appropriate solvent and then ultrasonically dispersing them for 1 minute using an ultrasonic homogenizer (US-150T; manufactured by Nippon Seiki Seisakusho). It can be determined as a volume-based particle diameter measured using a particle size distribution analyzer (MT3300EXII; manufactured by Microtrack Bell), that is, as a volume average particle diameter (D50).

The content of the functional particles in the mask treatment composition of the present invention is 0.1% by mass or more, 0.5% by mass or more, 1.0% by mass or more, 3.0% by mass or more, and 5.0% by mass. or more, or 10.0% by mass or more, and 30.0% by mass or less, 25.0% by mass or less, 20.0% by mass or less, 15.0% by mass or less, 10.0% by mass or less, Alternatively, it may be 5.0% by mass or less.

Functional particles include, for example, pigment particles, pearl materials, resin particles or inorganic particles that retain fragrance, resin particles or inorganic particles that retain moisturizing ingredients, blue light absorbing particles that absorb blue light, and blue light absorbing particles. blue light scattering particles to scatter, ultraviolet absorbing particles to absorb ultraviolet rays, infrared absorbing particles to absorb infrared rays, infrared scattering particles to scatter infrared rays, ultraviolet absorbing particles to absorb ultraviolet rays, ultraviolet scattering particles to scatter ultraviolet rays, receiving ultraviolet rays It may be an ultraviolet wavelength conversion particle or the like that emits light having a wavelength longer than that of the lever. In the context of the present invention, "blue light" means a short wavelength component of visible light, eg, a component with a wavelength of 380-500 nm.

When the functional particles are pigment particles, the mask can be colored. When the functional particles are a pearl material, it is possible to impart luster and pearl luster to the mask. If the functional particles are resin particles or inorganic particles carrying perfume, the mask can be scented. When the functional particles are resin particles or inorganic particles that retain moisturizing ingredients, they can moisturize the skin portion corresponding to the mask.

When the functional particles are infrared absorbing particles that absorb infrared rays or infrared scattering particles that scatter infrared rays, infrared rays can be prevented from penetrating the mask and hitting the skin. When the functional particles are blue light absorbing particles that absorb blue light or blue light scattering particles that scatter blue light, it is possible to prevent blue light from penetrating the mask and hitting the skin. When the functional particles are ultraviolet absorbing particles that absorb ultraviolet rays or ultraviolet scattering particles that scatter ultraviolet rays, it is possible to prevent ultraviolet rays from penetrating the mask and hitting the skin.

In addition, when the functional particles are ultraviolet wavelength conversion particles that receive ultraviolet rays and emit light with a longer wavelength than the ultraviolet rays, skin cells under the mask can be activated. In addition, description of patent document 3 can be referred for such a cell activation effect.

At least one selected from the group consisting of zinc oxide phosphors, magnesium titanate phosphors, and calcium phosphate phosphors can be used as the ultraviolet wavelength conversion particles.

When the functional particles are ultraviolet wavelength conversion particles that receive ultraviolet rays and emit light with a longer wavelength than the ultraviolet rays, the masking composition of the present invention can be used as a masking composition for activating cells. can. In this case, the mask treatment composition of the present invention is applied to the inside of the mask, particularly by spraying, so that the skin is efficiently irradiated with the light emitted from the ultraviolet wavelength conversion particles, thereby activating cells. effect can be obtained.

Therefore, when the functional particles are ultraviolet wavelength-converting particles that receive ultraviolet rays and emit light with a longer wavelength than the ultraviolet rays, the masking composition of the present invention is used as a masking composition for activating cells. A package and/or container that has a label to the effect that it is intended for use by applying to the inside of a mask, and/or that it is intended to be used by spraying inside a mask. can accommodate.

When the functional particles are ultraviolet wavelength conversion particles as described above, the masking composition of the present invention must not contain ultraviolet absorbers and/or ultraviolet scattering particles, or the masking composition of the present invention A relatively low content of UV absorbers and/or UV scattering particles in the article can increase the amount of UV light received by the UV wavelength converting particles, thereby promoting cell activation effects.

Therefore, when the functional particles are ultraviolet wavelength conversion particles as described above, the content of the ultraviolet absorber and/or the ultraviolet scattering particles in the masking composition of the present invention is independently 5.0% by mass. 4.0% by mass or less, 3.0% by mass or less, 2.0% by mass or less, 1.0% by mass or less, 0.5% by mass or less, 0.3% by mass or less, or 0.1% by mass In particular, the masking composition of the present invention does not contain UV absorbers and/or UV scattering particles.

The ultraviolet absorber includes, for example, benzophenone-based ultraviolet absorbers such as oxybenzone-3, oxybenzone-5, and oxybenzone-6, benzoic acid-based ultraviolet absorbers such as glyceryl para-aminobenzoate, salicylic acid-based ultraviolet absorbers such as ethylhexyl salicylate, Benzoylmethane-based UV absorbers such as t-butylmethoxydibenzoylmethane, benzotriazole-based UV absorbers, and ethylhexyl methoxycinnamate may be used. Also, the ultraviolet scattering particles may be, for example, at least one kind of powder selected from the group consisting of titanium oxide, zinc oxide other than the zinc oxide phosphor, iron oxide, and cerium oxide.

(dispersion medium)
The dispersion medium used in the mask treatment composition of the present invention is any dispersion medium that can be applied to the mask and allowed to come into contact with the skin, and that can disperse the functional particles with or without shaking. may be a liquid medium of Therefore, the dispersion medium may be either an aqueous dispersion medium or an oil dispersion medium. The dispersion medium may also be a water-in-oil or oil-in-water emulsion.

When the dispersion medium is an aqueous dispersion medium, the dispersion medium may contain alcohol in addition to water.

As alcohols, mention may be made of alcohols having alkyl groups of 1 to 5 carbon atoms, such as ethanol, propanol, isopropanol, isobutyl alcohol and tert-butyl alcohol, especially ethanol. These alcohols can be used individually or in combination of 2 or more types. In addition, the aqueous dispersion medium may further contain optional additives such as antioxidants, preservatives, wetting agents, thickeners, binders, and the like.

When the dispersion medium is an oily dispersion medium, silicone oil, hydrocarbon oil and/or ester oil can be used as the dispersion medium.

Silicone oils can include acyclic silicone oils and cyclic silicone oils. Acyclic silicone oils include linear silicone oils and branched silicone oils. Branched silicone oils include low molecular weight branched siloxanes such as methyltrimethicone, tris(trimethylsilyl)methylsilane and tetrakis(trimethylsilyl)silane. Cyclic silicone oils include octamethylcyclotetrasiloxane, decamethylcyclopentasiloxane, dodecamethylcyclohexasiloxane, and the like. Hydrocarbon oils include heptane, isododecane, isohexadecane, isodecane, and the like. Examples of ester oils include isopropyl myristate, diisopropyl sebacate, and dextrin palmitate. In addition, the oily dispersion medium may further contain optional additives such as antioxidants, preservatives, wetting agents, thickeners, binders, and the like.

When the dispersion medium is a water-in-oil or oil-in-water emulsion, the components exemplified above as the aqueous dispersion medium can be used as the aqueous phase component, and the components exemplified above as the oily dispersion medium can be used as the oil phase component. Emulsifiers that can be used and emulsify these water phase components and oil phase components can be used.

<Spray container containing mask treatment composition>
The masking composition-containing spray container of the present invention includes the masking composition of the present invention and a spray container containing this composition. The spray container containing the masking composition of the present invention can be used for spraying the masking composition of the present invention onto a mask.

The spray container containing the composition for mask treatment of the present invention has an indication that it is for mask treatment, an indication that it is for use as a nonwoven fabric mask, an indication that the mask treatment composition is used by spraying it on a mask, and an inner surface of the mask. A package with an indication that the mask treatment composition is to be sprayed on the outer surface of the mask, an indication that the mask treatment composition is to be sprayed on the outer surface of the mask, and an indication that the mask treatment composition is to be shaken before use; Or it can be housed in a container.

When the masking composition of the spray container containing the masking composition of the present invention contains ultraviolet wavelength conversion particles that receive ultraviolet rays and emit light having a longer wavelength than the ultraviolet rays, the spray container of the present invention is used. , indication that it is for cell activation, indication that it is for use by applying a mask treatment composition to the inside of the mask, and / or spraying the mask treatment composition on the inside of the mask It can be contained in a package and/or container bearing an indication that it is intended for use.

<Example 1>
A masking composition having the following composition was prepared. The zinc oxide phosphor (functional particles) used here was Lumate G (average particle diameter: 2.5 μm) manufactured by Sakai Chemical Industry Co., Ltd.

The mask treatment composition described above was placed in a spray container and sprayed onto the inside surface of a commercial non-woven mask. Here, this nonwoven fabric mask had a three-layer structure of outer nonwoven fabric/filter/inner nonwoven fabric.

After spraying the mask treatment composition, the mask was cut and separated into an outer nonwoven fabric, a filter and an inner nonwoven fabric, and each was irradiated with a black light to confirm the presence or absence of adhesion of the zinc oxide phosphor.

According to this, the zinc oxide phosphor was adhered to the inner nonwoven fabric and the filter, but the zinc oxide phosphor was not adhered to the outer nonwoven fabric. Therefore, it was confirmed that at least part of the zinc oxide phosphor having an average particle size of 2.5 μm permeated through the inner nonwoven fabric and was retained by the filter.

<Example 2>
Example 2 was conducted in the same manner as Example 1, except that the mask treating composition was sprayed onto the outside surface of the commercial non-woven mask rather than the inside surface.

According to this, the zinc oxide phosphor was attached to the outer nonwoven fabric and the filter, but the zinc oxide phosphor was not attached to the inner nonwoven fabric. Therefore, it was confirmed that at least part of the zinc oxide phosphor having an average particle size of 2.5 μm permeated through the outer nonwoven fabric and was retained on the filter.

《Prescription example》
Formulation examples of the masking composition of the present invention when zinc oxide phosphor is used as the functional particles are given below.

10A, 10B, 10C Functional particles 20A Outer nonwoven fabric 20B Inner nonwoven fabric 30 Filter 50 Sprayed composition 100 Three-layer nonwoven mask

Claims (10)

A mask treatment composition containing functional particles having an average particle size of 0.1 μm to 20 μm and a dispersion medium. The composition according to claim 1, which is for spraying. The composition according to claim 1 or 2, which is for non-woven masks. The composition according to any one of claims 1 to 3, wherein the functional particles are UV wavelength converting particles that receive UV light and emit light with a longer wavelength than the UV light. 5. The composition according to claim 4, wherein the ultraviolet wavelength converting particles are at least one selected from the group consisting of zinc oxide phosphors, magnesium titanate phosphors, and calcium phosphate phosphors. The composition according to claim 4 or 5, wherein the content of the ultraviolet absorber is 1.0% by mass or less. The composition according to any one of claims 4 to 6, wherein the content of UV scattering particles is 1.0% by weight or less. The composition according to any one of claims 4 to 6, which is for cell activation. A spray container containing a masking composition, comprising the composition according to any one of claims 1 to 8, and a spray container containing said composition. A method of using a mask treatment composition comprising spraying the composition according to any one of claims 1 to 8 onto at least one of the inner and outer surfaces of a mask.

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