TWI691283B - Face mask - Google Patents

Abstract

A face mask includes at least one layer formed by biodegradable plastics, biobased plastics or the combination thereof, a filtering layer and an inner layer formed adjacent to the filtering layer.

Description

Mask

The invention relates to a mask, and in particular to a mask and its manufacturing process.

Masks are currently hygienic products for filtering particles and bacteria. At present, the main components of all market masks are non-woven fabrics made of plastic materials, such as polypropylene PP. Such plastic materials are not easy to decompose and cause environmental burdens. Sheng Yan.

The present invention relates to a mask having the following characteristics. A mask includes: an outer layer comprising a non-woven fabric structure composed of any combination of one or more of poly D-type lactic acid, poly L-type lactic acid, and poly DL-type lactic acid, the non-woven fabric having a pore structure Mouth and nose breathable structure; the filter layer is arranged on the side of the outer layer; and the inner layer is arranged on the side of the filter layer, wherein the content of the poly D-type lactic acid is less than that of the poly L-type lactic acid, the crystallinity is increased to increase the lift Heat-resistant temperature. In another aspect, the object of the present invention is to propose a mask comprising a multilayer structure composed of an outer layer, a filter layer and an inner layer, at least one layer of which is one or more of poly D-type lactic acid, poly L-type lactic acid, poly DL-type lactic acid Any combination; wherein the weight of the outer layer or the inner layer is 20 to 30 grams per meter square to pass the gas permeability, wherein the content of the poly D-type lactic acid is less than that of the poly L-type lactic acid, increase the crystallinity to increase Increase the heat resistance temperature.

The invention discloses a mask, comprising: an outer layer composed of biodegradable plastic, bio-based plastic or any combination of the above; a filter layer arranged on the side of the outer layer; and an inner layer arranged on the side of the filter layer. The biodegradable plastic includes polybutylene succinate, polybutylene succinate-terephthalate, or any combination thereof. The bio-based plastic includes polylactic acid plastic. The biodegradable plastic content ratio is greater than the bio-based plastic. The filter layer contains activated carbon and carbon nanotube materials. The inner layer of cotton, biodegradable material, bio-based plastic or any combination of the above.

A mask comprising: an outer layer comprising polybutylene succinate, polybutylene succinate-terephthalate, polylactic acid or any combination of the above; a filter layer disposed on the side of the outer layer; and The inner layer is arranged on the side of the filter layer. The total content of the polybutylene succinate and polybutylene succinate-terephthalate is greater than that of the polylactic acid plastic. The filter layer includes activated carbon and carbon nanotube materials. The inner layer of cotton, biodegradable material, bio-based plastic or any combination of the above.

The invention discloses a mask, which comprises: an inner layer; a middle layer, which is arranged on the inner layer; and an outer layer, which is arranged on the middle layer. With resin; using a shaft-to-shaft type device to drive the substrate to move, through the dip tank with the dip solution, the substrate is absorbed by the dip solution to form an anti-ultraviolet material on the substrate, and the color can be changed by ultraviolet irradiation. The mixing ratio of photochromic dye and resin is 1:5-1:20.

A mask comprising: an outer layer, wherein the middle layer or the outer layer contains one or more combinations of antibacterial ingredients, enzymes, and anti-influenza substances; the middle layer is disposed on the outer layer; and the inner layer, the material includes hollow fibers and phase change fibers , One of ceramic material fiber, heating fiber or any combination thereof.

A mask comprising: a first ultraviolet-resistant layer with irregularly distributed first pores; a second ultraviolet-resistant layer with irregularly distributed second pores, arranged on the side of the first ultraviolet-resistant layer; and a filter layer arranged on the The side of the second anti-ultraviolet layer; and the inner layer are arranged on the side of the filter layer. The first anti-ultraviolet layer contains one of ultraviolet absorbers and photochromic dyes or any combination of the above, and the second anti-ultraviolet layer contains one of ultraviolet absorbers and photochromic dyes or any combination of the above. The irregularly distributed first pores are arranged in random numbers, and the irregularly distributed second pores are arranged in random numbers. If the total amount of anti-ultraviolet components is constant, the first and second anti-ultraviolet layers each contain half of the total anti-ultraviolet components. In another embodiment, wherein the density of the first UV-resistant layer is different from that of the second UV-resistant layer; then the first UV-resistant layer has more dye components than the second UV-resistant layer of UV-resistant layer .

A mask includes: a first ultraviolet-resistant layer with irregularly distributed first pores, the first ultraviolet-resistant layer includes a first photovariable dye; a second ultraviolet-resistant layer with irregularly distributed second pores, disposed in the On the side of the first anti-ultraviolet layer, the first anti-ultraviolet layer contains a second photovariable dye; filtering A layer is disposed on the side of the second ultraviolet-resistant layer; and an inner layer is disposed on the side of the filter layer. The irregularly distributed first pores are arranged in random numbers, and the irregularly distributed second pores are arranged in random numbers. The amount of the first photovariable dye is approximately equal to the amount of the second photovariable dye. In another embodiment, wherein the density of the first UV-resistant layer is different from that of the second UV-resistant layer; then the first UV-resistant layer has more dye components than the second UV-resistant layer of UV-resistant layer The color of the first photovariable dye is the same as the color of the second photovariable dye, wherein the color of the first photovariable dye is different from the color of the second photovariable dye. If the colors of the two layers are the same, the color multiplication effect can be improved; if the colors of the two layers are different, the color mixing effect can be achieved.

200: outer layer

200A: the first anti-ultraviolet layer

200B: The second anti-UV layer

220: filter layer

240: inner layer

The first figure is the mask of the present invention.

The second figure shows the structure of the anti-ultraviolet layer of the present invention.

Generally speaking, the mask consists of at least three layers, including the inner layer, the middle layer as the filter layer, and the outer layer. At present, the commercially available masks are mainly made of polypropylene, or a mixed material containing polypropylene as the main material. Although it has high impact resistance, strong mechanical properties, and resistance to various organic solvents and acid and alkali corrosion, but after discarding the mask, due to its It is not easy to decompose, but causes environmental burden.

Therefore, please refer to the first figure, which shows a schematic cross-sectional view of the mask of the present invention, which may include three or more layers. One embodiment includes the outer layer 200 as an outer layer and the middle layer as a filter layer 220 for filtering dust and bacteria. Etc., the inner layer 240 may be a skin-friendly layer, or a heat-generating or heat-storing layer to provide skin-friendly or warm-keeping effects. It is also possible to make a fragrance base material in the inner layer. The principle is to use fragrances, essences, essential oils, perfume raw materials, etc. added to the inner layer base material, so that the fragrance inner layer can be obtained and the effect can be improved. For the outer layer or the middle layer, cationic metal oxides or antiviral agents can be added to the outer layer 200 or the middle layer 220 to prevent viruses and the like. Traditionally, it can only filter bacteria, but cannot kill viruses. Therefore, in addition to filtering, the invention can also kill viruses. The outer layer 200 or the middle layer 220 can be sprayed, dipped, coated, or printed with the addition of cationic metal oxides or antiviral agents.

Aware that environmental problems caused by traditional plastics cannot be decomposed, so the outer layer 200 of the present invention uses biodegradable plastics or bio-based plastics to facilitate decomposition in the natural environment after being discarded, reducing environmental burden. The source of biodegradable plastics can be petrochemicals or biological materials, such as grains; bio-based plastics are plastics made of pure biological materials, such as polylactic acid plastics, and the main raw material comes from starch. In one embodiment, the invention uses, for example, polybutylene succinate (PBS), polybutylene succinate-terephthalate (PBAT) as the outer layer, filter layer or inner layer material, In order to facilitate the decomposition of microorganisms. In another example, polylactic acid is a natural biological material that will eventually decompose under certain conditions or time, but excessive rigidity is its disadvantage. Therefore, in one embodiment of the present invention, biodegradable plastic is mixed with bio-based plastic to be decomposable. Base material, make each layer or one layer of the mask. The mixing ratio depends on the required softness. In one embodiment, the content of biodegradable plastic is greater than that of bio-based plastic. In other words, the total content of biodegradable plastics such as PBS and PBAT is greater than 50%, that is, bio-based plastics are less than 50%.

The main materials of bio-based plastics are starch, polylactic acid and fiber protein. Its content does not contain traditional petrochemical plastic ingredients. It can be decomposed into carbon dioxide and water by aerobic microorganisms, water and oxygen in the soil in a multi-oxygen environment. In a low oxygen environment, it is decomposed into carbon dioxide and methane by anaerobic microorganisms and water. Polylactic acid is made from starch-fermented lactic acid as a raw material, because it comes from plants, and it can be decomposed very quickly under high temperature (60℃-70℃) and high water content (50-60%) in composting, about 50 days.

In another embodiment, polylactic acid is used, which is formed through fermentation and polymerization, and poly D-type lactic acid, poly L-type lactic acid, or poly DL-type lactic acid may be used. Prepare starch as the material; ferment the material to produce lactic acid; ferment and polymerize the lactic acid into raw granules; place the raw granules into equipment to form a non-woven fabric body. Including poly D-type lactic acid (PDLA type), poly L-type lactic acid (PLLA type), poly DL-type lactic acid or any combination of the above, heat resistance can be improved. The mixing of poly L-lactic acid and poly D-lactic acid can raise the melting point, which is about 50 degrees C higher than that of pure poly L-lactic acid or poly D-lactic acid. Reducing the content of D-type lactic acid in poly-DL-type lactic acid can increase the crystallinity (that is, the content of poly-D-type lactic acid is less than that of poly-L-type lactic acid), and its heat resistance temperature increases accordingly, which can reach 90 to 120. To pass the gas permeability of the CNS mask, the weight of the outer layer or inner layer is preferably 20 to 30 grams per square meter.

The filter layer 220 can be made of a decomposable substrate made by melt-spraying. In addition, in another embodiment, activated carbon or nano carbon tube substrate can be used as the filter layer 220. Will not cause petrochemical environmental protection burden. The structure of activated carbon is irregular arrangement of microcrystalline carbon, there are fine pores between the cross-connects, it will cause defects in carbon structure during activation, so it is a kind of porous carbon with large surface area. Nano carbon tube is a kind of tubular carbon molecule. Each carbon atom in the tube is mixed with sp2, and they are combined with each other by a carbon-carbon σ bond to form a honeycomb structure composed of hexagons as the skeleton of the nano carbon tube. . A pair of p electrons on each carbon atom that did not participate in the mixing form a conjugated π electron cloud that spans the entire carbon nanotube. According to the different layers of the tube, it is divided into single-walled carbon nanotubes and multi-walled carbon nanotubes. The radius of the tube is very thin, only nanometer scale, and in the axial direction can be as long as tens to hundreds of microns.

According to the ingenious idea of this case, in another embodiment, as shown in the second figure, it is a schematic diagram of a double-layer outer layer, which includes two anti-ultraviolet layers 200A and 200B. Based on the 200A anti-ultraviolet layer of the first anti-ultraviolet layer, the pores are irregularly distributed in random numbers rather than regular latitude and longitude distribution. Similarly, the pores of the second UV-resistant layer 200B are irregularly distributed in random numbers instead of regular latitude and longitude distribution. Therefore, the chance of overlapping the two layers of UV-resistant structure and pores is almost insignificant. Fortunately, most of the ultraviolet light that penetrates the pores of the first UV-resistant layer 200A will be absorbed or blocked by the second UV-resistant layer 200B, while the ultraviolet light reflected or diffused by the second layer can also be absorbed by the first layer , Significantly reduce UV penetration. Therefore, the invention greatly improves the ultraviolet filtering effect, and the ultraviolet UVB band penetration rate is only about 5%. The first anti-ultraviolet layer 200A may be doped with an ultraviolet absorber or photochromic dye, and the second anti-ultraviolet layer 200B may be doped with an ultraviolet absorber or photochromic dye. Although the present invention uses double layers as an illustration, three layers can also be used, but care must be taken to comply with gas permeability or pressure difference. In the present invention, a photo-chromic dye is doped into a resin, such as water-based or oil-based resin, which can be used in the form of micropowder, capsule, or liquid, and the photochromic dye is mixed with the resin and applied to the outer layer 200. For example, an aqueous resin is mixed with a hydrophilic photovariable dye to prepare the above-mentioned dip solution. The mixing ratio of photochromic dye and resin can be 1:5-1:20, which can be diluted with water to adjust the viscosity. Photovariable dyes can absorb sunlight or ultraviolet light to change the structure. After being irradiated by sunlight or ultraviolet light, the photoreactive dyes can produce a reversible chemical change and cause a color change. When not exposed to the above sunlight or ultraviolet rays, the original color can be restored. Photochromic dyes can be optionally doped with light stabilizers and UV absorbers to assist in the absorption of ultraviolet light. Adding antioxidants and/or UV absorbers can improve the resistance to light fatigue. In another embodiment, an oil-based photovariable dye can be used, mixed with a resin, and produced by printing or inkjet. The mixed volume percentage of oily photo-variable dye and resin is about 0.2-0.55. This can be printed and coated on at least the outer layer of the mask.

The inner layer 240 can be made of cotton or the above-mentioned biodegradable plastic or bio-based plastic. Or a mixture of the above. If it is warm, you can add zirconia and other components to the fiber, so it can convert visible light into far infrared to release heat energy. The other one uses heat-generating fiber woven into the fabric, which uses the fiber itself to absorb heat and release heat. The fiber absorbs the moisture released by the human body and condenses it into the heat released by the water. Elements that produce infrared rays can also be added, such as ceramic materials, which convert into infrared rays by absorbing visible light, and then into heat energy to raise the temperature. Wool can also be used to absorb moisture from the human body to form condensation heat and then be released. Adding far-infrared ceramic components to the fiber, such as zirconia, zirconium carbide, etc., reflects the far-infrared rays emitted by the human body and converts it into heat energy to achieve heat generation. Use "condensation heat effect" to absorb human body moisture. The temperature is released when the gas liquefies. This temperature is called the condensation point. The heating fiber uses the water vapor that cannot be seen by the human eye to reach the condensation point to become water (liquefaction). The temperature is absorbed and then released. Another embodiment uses skin-friendly materials and can control thermal convection and resist thermal radiation, such as TENCEL fibers.

Using hollow fiber cross-section, in addition to relatively reducing the specific gravity of the fiber, the fabric appears lighter; and effectively retains and isolates the air to achieve thermal insulation effect. The cross section of the fiber is hollow, and the air layer inside the fiber can block the loss of body temperature to achieve the effect of keeping warm. The ultra-fine fibers used in thermal insulation materials, ultra-fine fibers with a diameter of less than 2μm, PET fiber non-woven fabric can effectively retain more isolated air and reflect the heat radiated by the human body. PCM phase transfer material makes the fabric have special functions of heat absorption and heat release to obtain excellent heat preservation effect. For example, Outlast® fiber. Use phase change material (PCM, Phase Change Material), constantly adjust and balance with the microclimate area and the surrounding environment between human clothes, and then adjust the superheated or supercooled temperature to the most suitable level. It can absorb excessive heat of the human body, thereby reducing the humidity of the clothing and maintaining the comfort of the wearer; when the amount of exercise drops or the end of the exercise, the stored heat energy is released to prevent the wearer from catching cold.

For those who are familiar with the art in this field, although this creation is illustrated above with better examples, it is not intended to limit the spirit of this creation. Modifications and similar configurations made without departing from the spirit and scope of this creation should be included in the scope of the following patent applications. This range should cover all similar modifications and similar structures and should be interpreted in the broadest possible manner.

200‧‧‧Outer

220‧‧‧Filter layer

240‧‧‧ li

Claims (8)

A mask comprising: an outer layer comprising a non-woven fabric structure composed of any combination of one or more of poly D-type lactic acid, poly L-type lactic acid, and poly DL-type lactic acid, the non-woven fabric having pores to constitute a mouth and nasal breathable structure; filter layer, configuration On the side of the outer layer; and the inner layer, arranged on the side of the filter layer, wherein the content of the poly D-type lactic acid is less than that of the poly L-type lactic acid, increase the crystallinity, and increase the heat-resistant temperature. The mask as described in item 1 of the patent application scope, which further includes biodegradable plastic. The mask as described in item 2 of the patent application scope, wherein the biodegradable plastic comprises a mixture of one or more of polybutylene succinate and polybutylene succinate-terephthalate. The mask as described in item 2 of the patent application scope, wherein the proportion of the biodegradable plastic is greater than 50%. The mask as described in item 1 of the patent application scope, wherein the filter layer comprises activated carbon and carbon nanotube materials. A mask comprising a multi-layer structure composed of an outer layer, a filter layer and an inner layer, wherein at least one layer is any combination of one or more of poly D-type lactic acid, poly L-type lactic acid, and poly DL-type lactic acid; wherein the outer layer or the inner layer The weight is 20 to 30 grams per meter square to pass the gas permeability, wherein the content of the poly D-type lactic acid is less than that of the poly L-type lactic acid, and the crystallinity is increased to increase the heat-resistant temperature. The mask as described in item 6 of the patent application scope, which further includes biodegradable plastics, in which the The biodegradable plastic contains one or more of polybutylene succinate and polybutylene succinate-terephthalate. The mask as described in item 7 of the patent application scope, wherein the proportion of the biodegradable plastic is greater than 50%.

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