JPS62299266A - Washable deodorizing body and its production - Google Patents

Abstract

(57) [Summary] This bulletin contains application data before electronic filing, so abstract data is not recorded.

Description

[Detailed Description of the Invention] 3. Detailed Description of the Invention The present invention relates to a novel deodorizing body and a method for manufacturing the same, and in particular, a deodorizing body that is fast-acting, long-lasting, and wash-resistant, and a method for manufacturing the same. It is related to.

There are many sources of bad odors in the living environment that surround us, giving us discomfort and disgust.

This odor, along with noise and vibration, has traditionally been referred to as one of the three major pollutions, and is viewed with great concern, and legal regulations are being put in place to actively eliminate it. However, these have not yet penetrated into the actual living environment around us.

The present invention was carried out with the intention of eradicating even small odors generated in the home from the nuisance odors in a broad sense.

In general, the elimination of bad odors is usually expressed as deodorization or deodorization, but in a broader sense, they are interpreted to have the same meaning, so we will call them deodorization here.

If you look at the inner parts of your everyday life, you will find sweaty underwear, socks, bedding, jackets that smell like cigarettes, diapers, sheets, closets, shoe cabinets, lockers, meeting rooms, toilets, refrigerators, etc. There are countless trash cans, pet cages, gutters, etc.

Conventionally, the most common method for removing these odors is the adsorption method using activated carbon. Activated carbon, which is powdered charcoal, has restrictions in its handling, and there are also restrictions in its use, such as its effectiveness disappearing when it absorbs moisture.

Under these circumstances, research into the chemical components of odors has progressed, and new deodorizing methods have been discovered. That is, when classified based on the mechanism, (1) a method of adsorption and removal, (2) a method of decomposition and removal, and (3) a method of deodorization by chemical reaction. If further classified based on the form of use, (
1) Aerosol type, (2) Liquid type, (3)
It comes in powder granule type, etc.

By combining these, deodorants or deodorizing bodies can be created depending on the purpose. Here, a deodorant is a deodorizing component that is diluted with another gas, liquid, or solid substance and used in a single form, whereas a deodorizer is a deodorizer that uses these forms, such as fibers. It should be defined as being used in the form of being supported and fixed on a plastic sheet-like material.

As mentioned above, activated carbon has become so pervasive in industrial materials and household products that it is often referred to as a deodorant.

When used as an industrial material, it has become common knowledge to use a large amount and recycle it, but this concept has completely disappeared when it comes to household products.

As a result of intensive studies to develop a better method for using deodorants, the inventors of the present invention found that the deodorant itself has excellent durability and washing resistance, and can be easily recycled without sacrificing its fast-acting properties. We have succeeded in developing a highly effective deodorizing body and a method for producing it, and have arrived at the present invention.

That is, the deodorizing body of the present invention has a polyurethane porous film layer dispersing and carrying clathrates, whether the guest is a deodorant or not, on a support. It is preferably produced by mixing and dispersing the powder in a Polyurekne resin solution, applying this to a support, and then performing a solvent removal treatment or a foaming treatment to form a porous skin V layer.

The deodorant used in the present invention may be appropriately selected from known deodorants. Deodorants may belong to any of the 81 categories mentioned above as long as they can form inclusions as guests.
Chemical reaction type deodorants are most preferred. This chemical reaction type (well, it is a reaction defined in the field of chemistry such as neutralization, oxidation, addition, condensation, etc.), and various deodorants such as iron compounds, aluminum compounds, tree extracts, tea extracts, etc. It has been known.

In addition, the chemical reaction type has the characteristic that it can be used in combination with the adsorption removal type and the decomposition removal type, and has the effect of expanding the range of use by using the combination as well as having effects such as deodorizing ability, stability, and ease of use. The combined use of activated carbon or the like is usually preferred in order to enhance the deodorizing power.

The essence of the present invention is to combine the deodorant with polyurethane in the form of a clathrate as a guest compound, but the host compound, which is one of the components forming the clathrate, can also be used as appropriate in the form of a known clathrate-forming compound. selected from host compounds. Specific examples include crystalline cellulose, cyclodextrin, silica microbeads, and acrylic balloons.Those having a pore size of μ and whose clathrated guest compound is not easily released by water or solvents are preferable, and cyclodextrin in particular has an excellent effect in the present invention. shows.

Further, suitable methods known in the art can be applied to manufacture the clathrate. Usually, the mixed inclusion mixture obtained by the saturated aqueous solution method or the kneading method is dried by freeze drying, ventilation drying, spray drying, or reduced pressure drying, and then pulverized to obtain a powdery inclusion product.

This shape includes spherical powder, granular powder, dendritic powder, flaky powder, angular powder, spongy powder, irregularly shaped powder, etc.

In use, it may be of any shape, but in order to define its size, a spherical powder is shown here as a representative, and a powder having a diameter of 5 to 150 μm is suitable.

The clathrate thus obtained is dispersed in a film-forming polyurethane solution. As the polyurethane, any known polyurethane can be used as appropriate. For the application of polyurethane and the subsequent foaming treatment, known foamed polyurethane label forming conditions may be adopted as appropriate. For the foaming treatment, either a dry method or a wet method can be employed, but the wet method is particularly preferred. In this wet method, the above-mentioned clathrates are added and kneaded into a Naro viscous liquid made from an organic solvent solution of polyurethane, and then this is applied to a support and then passed through a coagulation bath of water etc. to achieve resin formation and foaming. It will be done. In addition, the process of resin formation and foaming is similar in the dry method as well.

During the resin formation and foaming process, gas escapes through the interface between the clathrate and the viscous liquid, resulting in interfacial separation between the clathrate and the polyurethane, and the pores of the porous polyurethane created by foaming. A film is formed in which the clathrate is incorporated in such a manner that a portion thereof is adhered to the polyurethane and a portion thereof is communicated to the outside through the wire hole. In addition, if an appropriate amount of an insoluble solid having the same shape as the clathrate is added to the polyurethane solution overnight,
This acts as a space formation aid and may be preferable. Examples of the insoluble solid include inorganic particles such as titanium oxide and silicon oxide, metal particles such as copper and aluminum, and their fillers, and organic polymer compound particles such as fluorine and polystyrene resin, and their fillers. The pore size of the porous polyurethane is preferably in the range of 5 to 250 microns.

In the present invention, any suitable support can be selected depending on the intended use of the deodorizer as long as it can withstand washing, dry cleaning, etc.

Specific examples include films, sheets, paper, nonwoven fabrics, mats, foams, plastics, molded products, wood, woven fabrics, knitted fabrics, etc., but ordinary textile products and plastic products are preferred, and among these, textile products are preferred. .

Conventional methods such as coating, padding, spraying, and impregnation can be used to apply the polyurethane solution to the support. It may be applied only to the surface, or it may be impregnated into the inside using a thick non-woven fabric or the like.

The proportions of each component in the deodorizer of the present invention can vary over a wide range, but typically the weight ratio of deodorant to clathrate host compound is 01:1 to 15:1 and the weight ratio of clathrate to polyurethane is 01:1 to 15:1. The range of 0.01:1 to 0.2:1 is preferred.

FIG. 1 shows a sectional view of the deodorizing body of the present invention.

The spherical particles 1 are clathrate particles in which a deodorant is included in a microporous material, and the film-shaped particles 2 are a polyurethane resin film layer. Further, the space around the film indicates the communicating pores 3 of the porous resin body, and 4 indicates the base material serving as the support. Since the deodorant clathrates are randomly distributed and fixed inside and outside the polyurethane film, the deodorant is in a state where it easily comes into contact with the outside air.

The deodorizing body of the present invention can be cut into a desired shape such as granules or ribbons depending on the purpose of use, and can also be used by laminating it in a sandwich or sandwiching it between other materials. You can also do it.

The deodorizing body of the Moki Invention is derived from the above-mentioned specific structure, and its effect is maintained stably for a long period of time without impairing the quick-acting properties of the deodorant used, and it has excellent washing resistance. This washing resistance is achieved by washing machine F! (washing, dry cleaning) also has the effect of regenerating the deodorizing effect.
Repeated cleaning treatments can maintain the effect for a longer period of time.

The deodorizing effect of the present invention was confirmed using ammonia gas (alkaline), which is a typical malodorous gas, and hydrogen sulfide gas (
r! A) was checked. Sensory testing methods for measuring odor include the direct display method and air dilution method, and methods for measuring chemical components include gas chromatography, detector tube methods, and colorimetric methods. That is, a fixed concentration of ammonia gas or hydrogen sulfide gas was injected into a 500 II 11 sealed container, and at the same time 8
cm of deodorizer was put in the container, and the residual gas concentration was economically measured using a gas detection tube to check the deodorizing effect. Gas detection tube 3LS for gastic ammonia and ALL for hydrogen sulfide manufactured by Kitazawa Sangyo ■ was used.

Washing was carried out 10 times according to JIS L217-103 method, and dry cleaning was carried out according to JIS L217-103 method.
The test was repeated 10 times according to the L-1018E method.

Next, the method of the present invention will be explained based on examples.

Although these are one of the preferred embodiments, the manufacturing method of the present invention is not limited to only the illustrative method.

Example 1 Seldal NΔ (deodorant made by Shoko Chemical) and Seldex N
(Host compound manufactured by Nihon Shokuhin Kako) were kneaded in a ratio of 1=1 and then dried under reduced pressure to obtain a deodorant clathrate. Next, 40 parts by weight of dimethylformamide was added to 8 parts by weight of the clathrate and thoroughly stirred, and further 100 parts by weight of Crysbon 8116 (urethane resin manufactured by Dainippon Ink Industries) was added and stirred for 30 minutes to obtain a mixed solution. . Next, polyester nonwoven fabric (1
00g/rn") using a reverse coater to a coating amount of 50 g/m" (in terms of resin solid content), and immediately coagulated in water for 5 minutes.
The product was further immersed in hot water at 60°C for 10 minutes, dehydrated using a mangle, and dried at 120°C for 5 minutes to obtain a deodorizing body using a polyester nonwoven fabric as a support.

Comparative Example 1 The random cloth used in Example 1 was dipped in a 20% aqueous solution of Cerdal NA (deodorizing agent made by Shoko Chemical), then squeezed with a mangle to a squeezing rate of 120%, and dried at 120°C for 5 minutes. A deodorizing body was obtained.

Comparative Example 2 10 parts by weight of the microporous clathrate containing the deodorant obtained in Example 1, 20 parts by weight of toluene, and Criscort P10
19 (acrylic resin manufactured by Dainippon Ink Industries) and 1.5 parts by weight of Crysbon NX (isocyanate crosslinking agent manufactured by Dainippon Ink Industries) were added and stirred for 30 minutes to obtain a mixed solution. Next, it was coated on one side of the nonwoven fabric used in Example 1 using a reverse coater to a coating amount of 50 g/m (in terms of resin solid content), and dried at 150°C for 30 minutes to obtain a deodorizing body.

Using the deodorizer obtained in the above examples and comparative examples,
The deodorizing effect on ammonia gas and hydrogen sulfide gas was measured. The results are shown in Tables 1 and 2.

Table 1 (Ammonia gas) Table 2 (Hydrogen sulfide gas) Example 2 Asahi Guard AG-710 (Asahi Glass fluorine water repellent)
Nylon taffeta (70d/
Example 1
A deodorizing body was obtained by processing in the same manner as above.

Next, 75μ polyester film (manufactured by Toshi) was coated with 1 part of Crisbon 4070 (urethane resin manufactured by Dainippon Ink Industries).
A mixed solution of 00 parts by weight and 30 parts by weight of toluene was coated with a reverse roll coater at a coating amount of 40 g/m' (1!
(based on fat solid content) and dried at 150°C for 3 minutes.

Next, the porous film surface of the deodorizing body obtained above and the resin coated surface of the polyester film were bonded together by passing them between a heat roll with a surface temperature of 130°C and a rubber roll, and then the nylon film was bonded. By peeling off the taffeta, a deodorizing body having a polyester film as a support was obtained.

Using the obtained deodorizer, the deodorizing effect on ammonia gas and hydrogen sulfide gas was measured. Tables 3 and 4 show the results.

Table 3 (Ammonia gas) Table 4 (7) Hydrogen sulfide gas) Example 3 Super Clean KS-YM-0 (Deodorant made by Coconoe)
and silica microbeads (host compound manufactured by Catalysts & Chemical Industry Co., Ltd.) in a ratio of 1:1 and dried under reduced pressure to obtain a deodorant clathrate. Next, add 6 parts by weight of this clathrate to White Heron A.
Add 6 parts of M-50 (activated carbon manufactured by Shikinichi Yakuhin Kogyo) and 40 parts by weight of dimethylformamide, and further add 8 parts of Crysbon.
116 (Polyurethane tree II'f manufactured by Dainippon Ink Industries)
J) 1 part by weight of 100 weight was added and stirred for 30 minutes to obtain a mixed solution.

Next, apply this solution to one side of a nylon nonwoven fabric (75 g/rn') using a reverse roll coater in an amount of 45 g/rn'' (
Immediately after applying the resin to a solid content (based on resin solid content), it was coagulated in water for 5 minutes, further immersed in hot water at 60°C for 10 minutes, dehydrated in a mangle, and dried at 120°C for 5 minutes to form a nylon nonwoven fabric. A deodorizing body to be used as a support was obtained. Using the obtained deodorizer, the deodorizing effect on ammonia gas and hydrogen sulfide gas was measured. Tables 5 and 6 show the results.

Table 5 (vs. ammonia gas) Table 6 (vs. hydrogen sulfide gas)

[Brief explanation of drawings]

FIG. 1 is a schematic enlarged sectional view showing the structure of a deodorizing body according to the present invention. 1... Inclusion body particles, 2... Film layer,
3...Communicating pores, 4...Base material,
5... Porous film layer, 6... Support layer. Patent Applicant: SEEN Co., Ltd., Agent
Patent attorney Takehiko Saito゛、・′

Claims (1)

[Scope of Claims] 1. A deodorizing body comprising a polyurethane porous film disposed on a support, in which a clathrate whose guest is a deodorant is dispersed and supported. 2. The deodorant according to claim 1, wherein the support is made of fiber. 3. A deodorizer characterized by mixing and dispersing a clathrate in which the guest is a deodorant in a polyurethane solution in powder form, applying this to a support, and then foaming it to form a porous film layer. How the body is manufactured.