JPH02104363A - Manufacture of deodorant bearer - Google Patents

Abstract

PURPOSE:To allow a deodorant bearer to exert the deodorizing power inherent to the deodorizing agent proper, lessening the likelihood of slipping-off of the deodorant in the form of fine powder, and facilitate handling by subjecting a film, which is prepared from a solution of crystalline highpolymer mixed with a deodorizing agent in the form of fine powder, to uni-axial elongation in an excessive degree at the stage where the film is not dehydrated completely, and by generating fine cracks in the longitudinal direction. CONSTITUTION:A film is prepared from a solution of crystalline highpolymer mixed with a deodorizing agent in the form of fine powder and subjected to uni-axial elongation in an excessive degree at the stage when the film is not dehydrated completely, so as to arrange the film particles in a certain orientation, and thereby cracks are initiated therein in its longitudinal direction. This elongation of the prepared film for orientation of particles improves its different physical properties. The performed excessive uni-axial elongation produces longitudinal cracks in a great number, which accomplishes a deodorant bearer with sufficient contacting oppotinities with odor components, being made in the form of a ribbon, cord, or a sheet further processed therefrom.

Description

DETAILED DESCRIPTION OF THE INVENTION Field of Industrial Application The present invention is directed to a method for producing a deodorizer carrier that makes it easier to handle a fine powder deodorizer that is too fine to handle as it is.

BACKGROUND OF THE INVENTION As life becomes more affluent, the demand for removing odors has expanded from so-called bad odors to even the most familiar odors in daily life.

For this reason, deodorizing agents are being actively developed, and substances that are significantly superior to conventional activated carbon are being produced one after another.

Some of these substances are originally obtained in fine powder or liquid form, so they are not only used by simply packing them in breathable bags, but they can also be added to paper stock and used to make paper, or impregnated into base paper. There is an active movement toward processing the materials into various forms.

Problems to be Solved by the Invention By the way, the glue component or resin itself acts as a binder, whether it is added to the paper stock and used to make paper, or is included in navy blue, foam, etc. Therefore, the fine powder deodorizer is coated with these binder components, and in this case, the contact with the odor components is not direct, and it cannot be said that the deodorizer is in a state where it can fully demonstrate its original ability.

Furthermore, even if deodorizers are available in fine powder form as well as liquid deodorizers, the particles are too small to be used by bagging them in a breathable bag, which is the typical conventional usage. This causes problems such as leakage from the breathable bag. However, even if this is kneaded into resin and molded into various shapes, the problem with the coating becomes even more serious.

Means for Solving the Problems Therefore, in order to solve the above problems, the method for producing a deodorant carrier of the first invention includes the step of mixing a finely powdered deodorant into a solution of a crystalline polymer. , a film forming process for forming a film from a crystalline polymer solution mixed with this fine powder deodorizing agent, and a point at which the film is not completely dehydrated;
The deodorizer carrier of the second invention is characterized by comprising a step of excessively uniaxially stretching the film to orient the molecules of the film and thereby producing shredded cracks in the longitudinal direction. The manufacturing method includes a step of mixing a finely powdered deodorizing agent into a solution of a crystalline polymer, a film forming step of forming a film from a solution of a crystalline polymer mixed with this finely powdered deodorizing agent,
At a point when the film is not completely dehydrated, excessive uniaxial stretching is carried out to orient the molecules of the film, thereby making it easier to generate cracks in the longitudinal direction, and creating cracks in the film after the stretching process. It is characterized by comprising a mechanical pressurization step.

It is well known that when a solution of a crystalline polymer is formed into a film and then stretched, the molecules become oriented and various physical properties are improved. If this is done excessively, a large number of cracks will occur in the longitudinal direction.

Normally, it would be considered useless, but if this is done using a solution mixed with fine powder deodorizer as raw material, many vertical cracks will occur, which will cause direct contact between the fine powder deodorizer and the atmosphere. This creates a state that is equivalent to the destruction of the polymer coating that inhibits Therefore, - If axial stretching is performed excessively and a large number of cracks are generated at that point, or even if no cracks are generated at that point, it is easy to do so by applying external force such as kneading or tapping. If this is carried out to such an extent that cracks occur in the deodorizer, a deodorizer carrier in the form of a ribbon, string, or even a sheet can be obtained, which has sufficient opportunity for contact with odor components.

EXAMPLE Next, an example of the present invention will be described. In this example, a white deodorizer mainly composed of titanium dioxide and zinc oxide was used as a fine powder deodorizer, and polyvinyl was used as a crystalline polymer. This will be explained assuming that alcohol is used.

Here, a fine powder deodorizer mainly composed of titanium dioxide and zinc oxide is described in detail in JP-A No. 63-54935. It is a fine white powder that is particularly good at adsorbing ammonia and hydrogen sulfide at low temperatures and at low concentrations, which is used as a guideline for comparative evaluation of deodorizing power. It is thought that zinc oxide chemically adsorbs acidic gases, and titanium dioxide physically adsorbs alkaline gases. Also, it is obtained by mixing an aqueous solution of a water-soluble titanium compound and a water-soluble zinc compound with an alkaline aqueous solution and drying the resulting precipitate.For example, titanium sulfate, Add sodium hydroxide, potassium hydroxide, and hydroxide to a mixed aqueous solution containing a titanium compound and a zinc compound such as titanium chloride, titanium nitrate, zinc sulfate, zinc chloride, and zinc nitrate in a molar ratio of 7:3 to 3. Aqueous alkaline solutions such as barium, ammonia, etc. are added in part or in whole at a reaction temperature of 40 to 60°C until the final PH
Mix in the range of 7 to 9, and the resulting precipitate to 150 to 22
It is preferable to dry it at 0°C. There is a fine powder deodorizer like this manufactured and sold by Titan Industries Co., Ltd. (hereinafter referred to as TZ deodorizer).Therefore, first, an aqueous solution of this TZ deodorizer and polyvinyl alcohol was prepared. Although not shown in the diagram,
Powdered or granular polyvinyl alcohol is put into a dissolution tank and water is added and mixed by stirring to make a paste-like, highly viscous polyvinyl alcohol aqueous solution, so-called dope, and at the same time or before or after this, TZ deodorizer is added. can be added to the above-mentioned dissolving tank to make a dope containing a finely powdered deodorizing agent.

When dope A containing a fine powder deodorizer is obtained in this way, it is filtered and defoamed, and then introduced into the hopper 1 as shown in Figure 1. A thin film is uniformly cast onto a large-diameter metal drum 2 which is placed close to each other and rotates slowly. A cover 3 is provided around the metal drum 2, into which hot air is introduced, and the dope on the metal drum 2 is evaporated to become a gel-like film B, which is peeled off from one end. is removed from the cover 3.

Thereafter, if the degree of water evaporation is not sufficient, it is sent to the drying chamber 4, where it is accelerated in drying and sent to the next stretching process while still in a gelled state.

In the stretching process, it is necessary to carry out -axis stretching, and to perform this in an excessive manner.

In this embodiment, as shown in the figure, a slow-driving roll 6 and a fast-driving roll 6 are arranged in front and behind each other in the stretching direction, and stretching is performed by the difference in driving speed. Note that it is desirable that these drive rolls 6.6 be appropriately heated and, in some cases, cooled, depending on the gelling state of the film. The difference in driving speed between the slow-driving roll 6 and the fast-driving roll 6 is set to a value considerably larger than the value conventionally considered appropriate, and by excessively orienting the film molecules, the vertical If mechanical pressure such as kneading or pounding is applied after that, it can be sufficient to cause cracks in the longitudinal direction.

Therefore, after this stretching process, the film will have many longitudinal cracks, or even if there are no cracks at that time, if an external mechanical force is applied to it, the film will easily crack.

In this embodiment, for this mechanical pressurizing process, two sets of a pair of rubber rolls 7 having spirally uneven surfaces are provided at the front and rear.
By passing the film that has undergone the above-mentioned stretching process between the rubber rolls 7, cracks in the longitudinal direction are reliably generated.

In this embodiment, the material is then passed through a drying chamber 8 for heat-setting, and a guillotine cutter 9 is placed in front of the drying chamber 8 so that it can be cut into appropriate lengths and taken out as strip-shaped strips C. ing.

The polyvinyl alcohol used as the raw material may be completely saponified or partially saponified. When a completely saponified product is used, a water-insoluble carrier is obtained, and when a partially saponified product is used, a water-soluble carrier is obtained. For this reason,
For example, after cutting both sides into strips, mixing the two, arranging this into a sheet, and sprinkling with hoarfrost,
By drying, a nonwoven fabric-like carrier can be obtained.

In addition, glycerin or glycols may be added as a plasticizer to the raw material polyvinyl alcohol, and if the dispersibility of the TZ deodorizer is poor, it is of course possible to treat it with a so-called coupling agent and mix it. It is.

In the above process, no matter what kind of crystalline polymer is used as the raw material, the fine powder deodorizer is mixed into the solution and then formed into a film, so the fine powder deodorizer is coated with the raw material polymer. It is usually finished in a polished state. In the examples as well, when the film was initially formed, TZ
Each fine powder of the deodorizing agent is surrounded by a very thin layer of polyvinyl alcohol.

However, in the present invention, since the film is stretched in a gel state, the film on the fine powder deodorizer is thinned, which is advantageous. It is considerably excessive than what was considered appropriate at the time, and the cracks easily form in the longitudinal direction, and furthermore,
At that time, the process is carried out to such an extent that cracks are already formed in the longitudinal direction, so a fractured surface is naturally formed, which is equivalent to breaking the coating on the fine powder deodorizer. On the other hand, in the case of a fine powder deodorizing agent, it is extremely rare for this fracture surface to occur at the exact center where the fine powder deodorizing agent is located, so it remains fixed and supported on either the left or right side.

In addition, in this example, since this is further cut into short pieces with a guillotine cutter, the film covering the fine powder deodorizer may be torn at that part as well, and the film may not be cut into strips. This makes it easier to handle.

Therefore, since a considerable number of fine powder deodorizers coated with polymers are in a state equivalent to having their coating broken, the fine powder deodorizer has many opportunities to come into direct contact with odor components. It is now able to demonstrate its original performance, and at the same time, the overall size is appropriate, making it easy to handle. Therefore, it can be used in a variety of ways, such as by putting it in a breathable bag or making it into a sheet to make a filter.

In addition, if a white deodorizer like the one in the above example is used,
The resulting carrier also has a clean, white color, and can be colored as desired, making it possible to use it in a completely new way than conventional deodorants.

Above, the fine powder deodorizer has been explained using the TZ deodorizer whose main components are titanium dioxide and zinc oxide as an example, but the fine powder deodorizer used in the present invention is not limited to this TZ deodorizer. Of course, a deodorizing agent can also be applied in the same way, and the crystalline polymer is not limited to the polyvinyl alcohol in the example, but any polymer that can be stretched and oriented can be used. In addition, in the above embodiment, in order to form a film,
Although the so-called casting method, in particular a drum method, has been described, the method is not limited to this, and various film forming methods can be used. Similarly, the stretching method is not limited to the above embodiments, and various film forming methods can be used. Stretching methods are available. In addition, in the above embodiment, after the stretching process, a rubber roll that applies mechanical pressure and a guillotine cutter are arranged.
After promoting the generation of cracks, the strips are cut into strips; however, the present invention is not limited to this, and as long as sufficient cracks are generated during the stretching process, it may be used as a finished deodorizer carrier. The carrier thus obtained can be used as a filter by folding it, for example.

Effects of the Invention Therefore, according to the present invention, the polymer film on the fine powder deodorizer is finished in a state equivalent to being broken, so a carrier can be obtained that can exert the deodorizing power inherent to the deodorant. Furthermore, there is little possibility that the fine powder deodorizer will fall off, making it extremely easy to handle and usable in various forms.

[Brief explanation of drawings]

FIG. 1 is a schematic diagram showing the steps of an embodiment of the method of the present invention. A: Polyvinyl alcohol solution B containing fine powder deodorizer
... Film C in gel state ... Deodorizer carrier in the form of strips Patent applicant: Cubic Engineering Co., Ltd. Representative: Mikiku Nakanishi

Claims (2)

[Claims] (1) A step of mixing a finely powdered deodorizing agent into a solution of a crystalline polymer, a film forming step of forming a film from a solution of a crystalline polymer mixed with this finely powdered deodorizing agent, and a step of forming a film completely. 1. A method for producing a deodorizer carrier, which comprises the step of excessively uniaxially stretching the film at a time when the film is not dehydrated to orient the molecules of the film and thereby generate cracks in the longitudinal direction. (2) A step of mixing a finely powdered deodorizing agent into a solution of a crystalline polymer, a film forming step of forming a film from a solution of a crystalline polymer mixed with this finely powdered deodorizing agent, and a step of forming a film completely. A stretching process in which the film is uniaxially stretched excessively at a time when it is not dehydrated to orient the molecules of the film and thereby make it easier to cause cracks in the longitudinal direction; and a mechanical pressure process to cause cracks in the film after the stretching process. A method for producing a deodorizer carrier, comprising: