JPH11221147A - Sunbeam shielding cloth having deodorizing function - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a functional nonwoven cloth, in particular a simple type screen or curtain, which can be installed in a new built house, apartment, etc., simply before no person(s) has yet moved in, can protect the inside of the room from suntanning, can remove detrimental substances generated in the room to fill it, and requires low cost and is serviceable disposably. SOLUTION: A sunlight excluding cloth is formed by applying or rubbing in a pharmaceutical agent to adsorb or decompose formaldehyde or alkyl phthalate to a nonwoven cloth of a weight of 30-300 g/m<2> made of fibers having a monofiber fineness of 3 denier or less. The nonwoven cloth should preferably include as at least one of its layers a melt blown nonwoven cloth consisting of ultra-thin fibers having a mean monofiber diameter of 12 μm or less.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a low-cost disposable sunscreen fabric having a deodorant function, which is easily attached to windows of highly airtight houses and condominiums where no people are occupying. In particular, it relates to screens or curtains.

[0002]

2. Description of the Related Art Many windows of conventional houses and condominiums have shutters or shutters, and when no one is occupied, the shutters and shutters are closed to block direct sunlight from outside, so that tatami or curtains, It was possible to prevent sunburn on flooring materials such as flooring and wall materials such as wallpaper and wall cloth. However, even in this case, because the airtightness of the room is high, alkyl phthalates such as formaldehyde and dioctyl phthalate and dibutyl phthalate generated from the interior materials gradually accumulate in the indoor air and are exhausted to the outside. As there is no room, it is unavoidable to adversely affect the people newly entering the room.

In particular, recently, windows of houses and condominiums have no shutters, and direct sunlight enters a room where no one is occupying, causing sunburn on flooring and wall materials. It is also known that formaldehyde contained in interior materials and plasticizers added to vinyl chloride (such as dioctyl phthalate and dibutyl phthalate) have an adverse effect on the human body. The inside of condominiums and the like is easily filled with this formaldehyde, dioctyl phthalate, and dibutyl phthalate, which has recently become a major problem.

[0004]

SUMMARY OF THE INVENTION The present invention can be easily installed especially when a new house, an apartment, or the like is not occupied yet, thereby preventing sunburn in the room and preventing indoor sunburn. It is an object of the present invention to provide a low-cost, nonwoven fabric made of a functional nonwoven fabric suitable for disposable use, in particular, a simple screen and a curtain, which can remove filled harmful substances.

[0005]

That is, the present invention provides a method for applying an agent for adsorbing or decomposing formaldehyde and alkyl phthalate to a nonwoven fabric having a basis weight of 30 to 300 g / m ^{2 made} of fibers having a single fiber fineness of 3 denier or less. Alternatively, it is a sunscreen fabric having a deodorizing function, particularly a screen or curtain, which is kneaded.

[0006]

According to the present invention, by simply hanging the screen or curtain, or placing it on a frame and placing it like a partition, it prevents direct sunlight from entering the room and prevents tatami mats and carpets from burning on the sun. I do.
In addition, since a chemical agent that adsorbs or decomposes formaldehyde and dioctyl phthalate or dibutyl phthalate is applied or kneaded, it absorbs or decomposes harmful substances that are likely to occur in new houses and condominiums.
As a result, the concentrations of formaldehyde, dioctyl phthalate, and dibutyl phthalate in the room are reduced to a level that does not cause a problem for the human body.

[0007] The fabric used for the screen or curtain is made of non-woven fabric rather than woven or knitted fabric in order to make it possible to manufacture the screen or curtain at a low cost, which can be discarded by temporary use, and to make the light shielding rate as high as possible. Is preferred,
The non-woven fabric is used.

[0008] The nonwoven fabric of the present invention can be obtained by any known web forming method such as a dry method such as a card method or an air lay method, a wet method, and a direct spinning method such as a spun bond method or a melt blow method. The bonding method of the web may also be performed by a mechanical bonding method such as a needle punch method or a spunlace method, or by using a binder fiber and through-air heating or a thermal bonding method using a calender. It may be something.

The material used for the non-woven fabric is not particularly limited, and any of synthetic fibers such as polypropylene, polyethylene, polyester, polyamide, and polyacrylonitrile, regenerated fibers such as rayon, and natural fibers such as pulp and cotton can be used. They can be used alone or in combination. Also, as is well known, the synthetic fibers are
They may be of a single component or of a composite component type having different characteristics or materials.

The fabric according to the present invention uses a nonwoven fabric as its constituent material because of the requirement that it can be constructed at low cost and that it can effectively block sunlight. Although it is not limited to this, it is desirable that the sunshine be blocked as effectively as possible with a low basis weight. In that respect, the nonwoven fabric of the present invention is:
It is preferable that the fibers have a single fiber fineness of 3 denier or less, have a basis weight of 30 g / m ² to 300 g / m ² , and have a visible light shielding factor of 60% or more. When the fineness of the single fiber is 3 denier or more, the voids between the fibers become large, the sun-shielding property becomes poor, and if the basis weight is increased, the fiber becomes heavy and bulky, so that it is preferable. Absent. If the basis weight is less than 30 g / m ² , the effect of blocking sunlight is weak and the strength is low, which is not preferable.
If it exceeds 0 g / m ² , it is not preferable because the quality becomes excessive and the cost is increased, and the material becomes thick and bulky. When the visible light shielding ratio is lower than 60%, the effect of preventing sunburn is reduced.

[0011] Among the nonwovens, meltblown nonwovens are more suitable for their use. This is because the melt-blown nonwoven fabric is composed of ultrafine fibers having an average single fiber fineness of not more than ten microns, and is in a form in which the ultrafine fibers are very uniformly dispersed and distributed. Among them, a melt blown nonwoven fabric made of a single fiber having a single fiber fineness of 12 μm or less, more preferably 10 μm or less is particularly preferable. If necessary, the melt blown nonwoven fabric can be combined with another fabric or a synthetic resin rib-like material to reinforce its strength.

The nonwoven fabric of the present invention may be coated with an agent that adsorbs or decomposes formaldehyde contained in house interior materials or the like, or dioctyl phthalate or dibutyl phthalate added as a plasticizer to vinyl chloride. It is necessary to knead the compound, but as the agent having such a function, a composition using both an adsorbent and a photocatalyst having a photocatalytic function is preferable. Among them, as the adsorbent, a phosphate of a tetravalent metal and a hydroxide of a divalent metal are particularly preferable, and as a photocatalyst having a photocatalytic function,
Titanium oxide and zinc oxide are particularly preferred. A drug comprising a composition in which both of these are used is very preferable because it has excellent ability to remove odorous components and the ability to remove the odor component is maintained for a long period of time. In the present invention, it is desirable to use this drug. Details of such agents are described in JP-A-8-284011.

The drug may be applied and supported after forming the nonwoven fabric, or may be applied and supported on the fiber at the stage of the fiber before forming the nonwoven fabric, and the drug component may be mixed with the fiber-forming resin. May be contained in the fibers constituting the nonwoven fabric by a so-called kneading method. In the case of the kneading method, it is effective to use a core-sheath type composite spinneret and arrange a drug-containing component on the sheath component side in order to cause the drug to be present at a higher concentration on the surface side of the fiber.

When a chemical comprising a photocatalyst and an adsorbent as described above is used, the chemical is used in an amount of about 0.1 to 5% by weight, more preferably about 0.3 to 5% by weight, for the entire nonwoven fabric. ~ 3% by weight should be used, and within that range,
The ratio of the photocatalyst is 10 to 75 with respect to 100 parts by weight of the adsorbent.
More preferably, it is 0 parts by weight.

[0015]

EXAMPLES Hereinafter, the present invention will be described more specifically based on examples, but the present invention is not limited to these examples.

Example 1 [Preparation of a drug]; Cu (II) -Ti (I) was prepared based on a method of preparing a drug described in JP-A-8-284011.
V) —SiO ₂ —TiO ₂ composition was prepared. That is,
Copper sulfate crystals (CuSO ₄ · 5H ₂ O, manufactured by Wako Pure Chemical Industries, Ltd. guaranteed reagent) and 43.9g were dissolved in 1 l of distilled water, aqueous titanium sulfate solution (about 30 wt% density obtained, manufactured by Wako Pure Chemical Industries, Ltd. 60 g of reagent). This mixture is Cu (I
I) It contains 0.175 mol and 0.075 mol of Ti (IV) ions. This mixture is stirred at room temperature for 1 hour.
When about 110 g of a 5% by weight phosphoric acid solution was added dropwise, a white precipitate was formed. The mixture in which the precipitate was formed was stirred as it was for 24 hours. While stirring the solution containing the precipitate (solution A) and 471 g of an aqueous solution containing sodium silicate (solution B) in separate beakers, the mixture was dropped in parallel into a vessel containing 500 ml of distilled water. Cu (II) -Ti
A pale-white mixed precipitate containing (IV) -SiO ₂ was obtained.
The amounts of the solution A and the solution B were adjusted so that the pH of the solution A and the solution B during mixing was always about 7.0. Solution B was prepared by diluting sodium silicate (a reagent manufactured by Wako Pure Chemical Industries) to 30% by weight with distilled water (containing 0.86 mol as SiO ₂ ) and adding 30 ml of a 15% by weight aqueous sodium hydroxide solution. did. After the mixture of the solution A and the solution B was further stirred at room temperature for 2 hours, the blue-white precipitate was filtered by suction, washed sufficiently with warm deionized water, and then dried at 40 ° C. The dried product is ground in a mortar to 120 microns or less.
To give a pale powder containing _{I) -Ti (IV) -SiO 2} . 20 parts by weight of titanium oxide powder (manufactured by Ishihara Sangyo Co., Ltd., MC-90) was mixed with 80 parts by weight of the bluish white powder, and the mixture was pulverized with a jet mill to obtain a drug.

[Application of nonwoven fabric and chemicals] The above chemicals were applied by dipping to a dry nonwoven fabric having a basis weight of 200 g / m ^{2 and} consisting of 70% of polyester short fibers having a denier of 2 denier and 30% of thermal binder fibers. 2 for
%), Cured and dried.

[Test] The above non-woven fabric was cut so as to be each 5 cm longer than the window frame of the room by length and width, and a hook was attached to the upper part of the non-woven fabric so that it could be hooked on a curtain rail. Hanged in the window of the room. After standing for about three months, the room looked almost tanned in the tatami mat compared to the room without hanging the nonwoven fabric. The formaldehyde concentration in the room was also low (0.4 ppm; formaldehyde concentration in the room without hanging cloth: 2 ppm).

[0019]

As described above, according to the present invention, formaldehyde and alkyl phthalates such as dioctyl phthalate and dibutyl phthalate are well adsorbed or decomposed at the window openings of houses and condominiums where no people are occupying. The non-woven fabric that is coated or kneaded is made of a non-woven fabric that can be easily hanged as a screen or curtain. Can prevent sunburn and absorb or decompose formaldehyde and alkyl phthalate, which are likely to occur in newly built houses and condominiums, so that the concentration of formaldehyde and alkyl phthalate in the room can be reduced as a result. .

Claims (4)

[Claims] 1. A method of applying or kneading an agent for adsorbing or decomposing formaldehyde and alkyl phthalate to a nonwoven fabric having a basis weight of 30 to 300 g / m ^{2 made} of fibers having a single fiber fineness of 3 denier or less. A sun-shielding fabric having a deodorizing function. 2. The nonwoven fabric according to claim 1, wherein the meltblown nonwoven fabric made of ultrafine fibers having an average diameter of a single fiber of 12 μm (μm) or less is used as at least one layer. Sunlight shielding fabric having odor function. 3. The sunscreen fabric according to claim 1, wherein the sunscreen fabric is a disposable screen. 4. The sun-shielding fabric according to claim 1, wherein the sun-shielding fabric is a disposable curtain.