JP4320424B2 - Deodorizing paper and manufacturing method thereof - Google Patents

Description

  The present invention relates to a deodorizing paper and a method for producing the deodorizing paper for the purpose of obtaining a paper having the appearance of Japanese paper and having a high deodorizing ability and does not bleed of printing ink.

  Conventionally, as a deodorizing paper, a heat deodorizing paper by mixing a deodorizing agent such as zeolite and a heat resistant fiber such as glass fiber has been proposed.

Further, there has been proposed a deodorizing sheet made of an activated carbon material and at least a part of the outer fiber layer portion made of a hydrophilic cross-linked polymer and the remainder made of an acrylonitrile-based polymer, and made of a fiber material containing a carboxylic acid.
JP-A-6-269626 JP-A 64-56142

  According to the prior art, there is a problem that the deodorizing ability is small, there is a sense of incongruity when the living space or the patient's skin is touched, and the printing ink is blurred.

  When a flocculant (for example, an anionic, cationic or nonionic polymer flocculant) is used to increase the flocs of the zeolite, particularly when a deodorizing agent such as zeolite is attached by papermaking, the zeolite and the fiber Adhesiveness is improved, but the fibers themselves aggregate to form a non-uniformly sized block (floc). It turned out to be defective and difficult to become a product. The flocculant causes the zeolite and the fiber to form a floc together.

  Further, in the conventional paper making of zeolite and fiber, the adhesion of zeolite is usually expected to be only about 10% (mass), and therefore there is a problem that the deodorizing performance is low.

  In addition, when a large amount of binder (or adhesive fiber) is added and the adhesive strength is increased, the binder covers the surface of the zeolite, and the deodorizing performance is hindered. There was also a problem that the adhesive strength was reduced and it was difficult to hold the zeolite firmly.

  In the present invention, the proportion of zeolite or the like is increased (for example, 10% to 90% (mass)), and the flocculant (for example, 0.01% to 0.2%) is mixed into a mixture of organic short fibers and water. Was added to form flocs and forced to pass through the filter to eliminate flocs of excessive flocculants and fibers, and the paper was made after uniformization, so the conventional problems were solved. is there.

That is, this invention is a concentration of 0.5% to 20% (mass) of the sum of 10% to 90% (mass) of the fine particle deodorizer and 90% to 10% (mass) of organic fibers. After adding water to make a mixed solution, add an appropriate amount of flocculant and fixing agent, stir and mix, make the organic fiber and the fine particle deodorant floc, and forcibly pass through the filter. The deodorizing paper is obtained by adjusting the size of the deodorant and the organic fiber to be condensed and dissociating, then papermaking, and heating and drying to firmly bond the deodorant and the organic fiber . Here, the deodorizing agent is characterized in that it is a single or mixture of zeolite fine powder or activated carbon fine powder of 1 μm to 200 μm, and the organic fiber is made of pulp, waste paper, other cellulose fibers or synthetic fibers It is a feature. Further, the filter, the filter or gap 0.5 mm to 10 mm with a pore diameter of 0.5 mm to 10 mm, is obtained by a filter over having a slit length 30Mm～60mm.

Next, the invention of the method is to add water to 10% to 90% (mass) of the fine particle deodorant and 90% to 10% (mass) of organic fibers, so that the concentration is 0.5% to 20%. Add a suitable amount of flocculant and fixing agent to this mixed solution and stir and mix to make the organic fiber and the fine deodorizing agent floc. after condensation the size of the organic fibers and sizing and dissociation, and paper, which was heated and dried, a method for producing a deodorizing paper characterized in that to firmly adhere the deodorant and organic fibers.

Furthermore, the deodorizer is a 1 μm to 200 μm zeolite fine powder or activated carbon fine powder used alone or as a mixture, heating is performed at 80 ° C. to 200 ° C. for 10 seconds to 40 seconds, and the nonwoven fabric is made of organic fibers. it is an ^{10g / m 2 ~100g / m 2} .

  In the present invention, if the amount of the deodorant is less than 10% (mass), the deodorizing effect is drastically reduced, and if it exceeds 90% (mass), the adhesive force to the deodorant is reduced and may be peeled off during use. Therefore, it is preferably 20% to 50% (mass).

  In the present invention, when the particle size of the deodorizer is less than 1 μm, not only a great effort is required to make a powder, but the absorption efficacy is not changed. Moreover, when the particle size of the deodorizer exceeds 100 μm, a decrease in absorbability is recognized as the total surface area of the particles decreases.

  The amount of the flocculant used in the present invention is 0.01% to 0.2% (mass) based on the total amount of the deodorizer and the organic fiber. If the amount of the flocculant is less than 0.01% (mass), there is a risk of insufficient aggregation, and even if it exceeds 0.2% (mass), there is no difference in the agglomeration effect. Mass) is the upper limit, and preferably 0.05% to 0.15% (mass).

  The concentration of the mixed liquid (ratio of solid matter and water) during wet papermaking in this invention is 0.1% to 1.5% (mass) of the solid matter.

  As an adhesive fiber used in the present invention, a synthetic resin (for example, polyvinyl alcohol) that is softened by low-temperature heating (for example, 70 ° C. to 100 ° C.) and exhibits adhesive force is used as a short fiber (for example, 2 mm to 5 mm). If 3% to 10% of the fiber amount is mixed), the papermaking main fibers can be firmly bonded when papermaking and heat drying.

  In the present invention, a large amount of deodorizing agent is adhered and held during paper making, and the small holes between the fibers are filled, so there is no risk of bleeding of printing ink and the like, and printing can be performed as well as ordinary paper. . Therefore, if it is used as calendars or other papers (including decorations) to be used on the wall, the effect of deodorization can be exhibited together with practical use (calendars and others).

  As described above, the deodorizing paper of the present invention is used for direct use (calendar, etc.), indirect use (decoration or containers, etc.), and part or all of care products (sheets, pants, diapers, etc.). be able to.

  In the above, for applications where tensile force is applied during use, for example, non-woven fabric and paper-made deodorized paper can be used in layers to obtain a tension-enhanced deodorized paper.

  According to this invention, since the flocs of the deodorizing agent are attached to the organic short fibers and then passed through the filter, the flocs are sized so that a homogeneous paper can be made and a relatively large amount of the deodorizing agent can be obtained. There is an effect that can be held. Moreover, the reinforced deodorizing paper can be obtained by pinching the deodorizing agent with a non-woven fabric or attaching the non-woven fabric to the deodorizing paper and heating it under pressure.

  This invention comprises 20% to 50% (mass) of 20 μm to 100 μm fine zeolite, 80% to 50% (mass) of organic fibers, and water for a total concentration of 2% to 6%. In addition, a uniform mixed solution is prepared, and 0.05% to 0.15% of a polymer flocculant and an adhesive fiber are added to this and further stirred to obtain a uniform mixed solution.

  If the flocs of the zeolite and the fiber are formed by the stirring, the mixed liquid is forced to flow and passed through a filter having a large number of pores having a pore diameter of 4 mm. The mixed solution is dropped onto a papermaking screen to make a paper. The deodorized paper of the present invention can be obtained by transferring the paper made up to a blanket conveyor, then contacting the outer wall of the drum dryer and heating and drying and bonding and fixing the fibers at a temperature of about 100 ° C. for 20 seconds to 30 seconds. .

In another invention, a non-woven fabric is made of organic fibers, and zeolite fine particles or zeolite fine particles are flocked onto the non-woven fabric in an amount of 20% to 40% (mass) or 40 g to 50 g / m ² of the non-woven fabric. After spraying, after covering the zeolite with the same non-woven fabric as the non-woven fabric, the upper and lower non-woven fabrics are bonded and integrated by heating with a drum dryer at 150 ° C. to 200 ° C. for 20 seconds to 30 seconds. As a result, the deodorizing paper of this invention is completed.

  In the above, zeolite fine particles are used as deodorizers, but activated carbon fine particles can be used instead of zeolite, or zeolite fine particles and activated carbon fine particles can be mixed. In the case of using activated carbon fine particles, the amount added may be the same as that of zeolite, but since the product becomes black, it is often practical to use a place that may be black or inconspicuous.

  Another embodiment of the present invention will be described with reference to FIG. A mixed solution obtained by adding 2500 kg of water to 100 kg of organic short fibers (1 mm to 7 mm) obtained from pulp, waste paper, synthetic fibers, etc., and zeolite with 2000 kg of water and an average particle size of 30 μm in 100 kg of organic short fibers. Add 90kg, add flocculant and stir to make a B mixture containing zeolite and fiber floc, mix the A mixture and B mixture, filter this mixture and filter the whole solid After sizing and breaking up the product, it is rolled up endlessly by a paper-making net. If this paper is transferred to a blanket conveyor and then dried with a drum dryer, the deodorizing paper of the present invention can be obtained.

  The deodorizing paper is given a product with antibacterial properties. The antibacterial property is imparted by a conventionally known method. The antibacterial properties can prevent the growth of various bacteria and suppress the generation of odor.

[Test Example 1]
Using the deodorized paper obtained in Example 1, the following deodorization test was conducted at Yamaichi Washi Kogyo Co., Ltd. (address: 1488 Kawadaimon-cho, Nishiyatsushiro-gun, Yamanashi Prefecture). The following results were obtained.

Deodorant evaluation (sample) of Example 1
Samples are shown in Table 1.

(Test method)
Evaluation of deodorizing properties of ammonia and hydrogen sulfide (1) One sample (size: 90 mm × 78 mm) was put in a Tedora bag, and 1 liter of air was injected.

  (2) A predetermined amount of test gas was injected, and the residual gas concentration after 0.5, 2, 4, and 24 hours was measured with a detector tube.

  (3) The same evaluation was performed without using a sample to obtain a gas blank.

The result of Table 2 was obtained by the above.

・ Nonenal deodorant evaluation (sensory evaluation)
-Adjustment of test gas (1) 400 microliters of nonenal reagent was put into the Tedora bag, and Air2L was inject | poured.

  (2) The mixture was allowed to stand at room temperature for 24 hours, and the gas portion in the tedla bag was used as a nonenal test gas.

Sensory evaluation method (1) One sample (size: 90 mm × 78 mm) was placed in a 1 L screw bottle (test bottle) and covered.

  (2) 5 ml of nonenal test gas was injected.

  (3) After 2 hours, sensory evaluation was performed by sniffing the odor in the test bottle (atmosphere), taking out the sample, and sniffing the odor of the sample directly.

As a result, the results shown in Table 3 were obtained.

  As shown in Tables 2 and 3, it was confirmed that the paper of this invention had high deodorizing properties.

[Test Example 2]
The deodorized paper (B5 version) obtained in Example 1 was used and tested at the Toyama Industrial Technology Center, and the results shown in FIGS. 5 and 6 were obtained.

(Measuring method)
1. Preparation of raw gas (1) A gas generating solution was prepared by adding 2 ml of a formaldehyde (HCHO) solution (37%) and ammonia (NH3) aqueous solution (25%) of a predetermined concentration to 200 ml of water.

  (2) Nitrogen was bubbled into the above solution with a bubbling tower, and the generated gas was collected in a Teflon (registered trademark) bag to be a raw gas.

  (3) The raw gas concentration is measured with a detector tube.

HCHO is sucked 5 times with 100 ml, NH3 is sucked once with 100 ml (the same applies to the deodorization test below)
2. Deodorization test (1) Blank measurement (a) A Teflon (registered trademark) bag is sealed without a sample and filled with 8 liters of air for HCHO and 4 liters for NH3.

    (B) A predetermined amount (HCHO: ca.90 ml, NH3: ca.400 ml) of the raw gas is injected with a glass syringe.

    (C) The time after sufficient stirring was set as the measurement start time, and the gas concentration was measured every predetermined time to obtain a blank.

(2) Sample measurement (a) Two samples (B5 version) of HCHO and one NH3 are sealed in a Teflon (registered trademark) bag, and air is introduced in the same manner as the blank.

    (B) A predetermined amount (HCHA: ca.90 ml, NH3: ca.400 ml) of raw gas is injected with a glass syringe.

    (C) The raw gas injection time is set as the measurement start time, and after sufficient stirring, the gas concentration is measured every predetermined time.

3. Raw gas concentration (1) Formaldehyde: about 500ppm
(2) Ammonia: about 3,000 ppm
(Measurement result)
As shown in FIGS. 5 and 6, the injected gas became extremely small in 60 seconds to 70 seconds and became almost odorless.

  If another embodiment of the present invention is described with reference to FIG. 2, 110 kg of pulp short fiber length (1 mm to 7 mm) and 2500 kg of water are added and stirred uniformly, and 100 kg of zeolite having an average particle size of 30 μm is added and further stirred. To make a raw material mixture.

  Into this raw material mixture, 10 g of polymer flocculant was added and further stirred. If flocs of zeolite and fibers were formed due to the effect of the flocculant, 50 g of aluminum sulfate was added as a fixing agent and fixed. After that, forced flow (for example, using a water supply fan) is passed through a filter consisting of a large number of holes with a diameter of 4 mm, and large flocs (including fiber flocs) are separated and pass through the filter. Becomes a floc (fiber bundling) having a substantially constant size. Therefore, it is supplied to the fixed amount on the papermaking net, and the papermaking net is moved to make an endless belt, transferred to a blanket conveyor, dried by contact with a drum dryer, and deodorized with zeolite of the present invention. Can make paper.

In the above, the falling amount of the mixed solution, to calculate the amount of movement of抄網, if the amount of zeolite and deodorizing paper 50g~60g / ^{m 2,} the deodorizing sheet 0.05 m ² into the air 20 l The smoke of cigarettes was blown in and the cigarette odor was remarkably reduced in 20 hours.

In addition, regarding the odor peculiar to a sick person generated at the time of nursing, it was recognized that the odor was remarkably reduced by laying the deodorizing paper 1 m ^{2 to 2} m ² under the flooring.

  It was recognized that deodorization and practical use were combined when a diaper was made from this deodorizing paper or used as pants.

  Another embodiment of the present invention will be described with reference to FIG. Fibers obtained from pulp, waste paper, synthetic fibers, etc. are used as a main material, and synthetic fibers that become adhesives are mixed with this by heating to 5% to 10% (mass) of the total amount, and a belt-like nonwoven fabric is made in the usual manner. This non-woven fabric is horizontally moved on a belt, and after flocked zeolite is sprayed on the non-woven fabric and uniformly distributed, the non-woven fabric of the same quality as the non-woven fabric is coated on the zeolite and is pressed with a drum dryer. The deodorizing paper of this invention was obtained by heating and integrating the upper and lower nonwoven fabrics.

  A non-woven fabric was superimposed on the top of the deodorizing paper obtained in Example 1, then heated under pressure, and the deodorizing paper and the non-woven fabric were bonded together to obtain a reinforced deodorizing paper of the present invention.

Add 1000 kg of water to 100 kg of zeolite powder to make a mixed solution, impregnate the mixed solution with 60 g / m ² of non-woven fabric made of synthetic fibers, attach the zeolite integrally to 50 g / m ² , and then dry and fix Then, the deodorizing paper of this invention can be obtained.

  Even if one side or both sides of the deodorizing paper is coated with Japanese paper or non-woven fabric and adhered integrally (for example, thermal bonding), even if a large amount of zeolite (for example, 40% or more of the total weight) is adhered There is no risk of separation.

  The Example which used the deodorizing paper (Example 1) of this invention for the sheet | seat for nursing care is shown.

  As a care sheet, the size varies depending on its use (use position), but in this embodiment, the length is 2 m, the width is 90 cm (equivalent to the flooring), the length is 130 cm, and the width is 90 cm (the patient's excretory part sheet) And so on.

  If it demonstrates with FIG. 4, from the bottom, on the vinyl film 1 (thickness 0.1mm), the absorption paper 2 (4 sheets pile, thickness 0.3mm), the deodorizing paper 3 (4 sheets pile, thickness 0) .2 mm), absorbent paper 4 (two sheets, 0.2 mm) and non-woven cloth (one sheet, 0.1 mm) are overlaid, and then the four circumferences 6 and 6 are bonded and sealed with the vinyl film 1 and the non-woven cloth 5. (Eg thermal bonding).

  According to the above structure, the total thickness is 1.0 mm, but it is usually about doubled by the elasticity of each fiber (about 2.0 mm). It becomes.

  Therefore, the patient is supported with elasticity and bed slipping is remarkably reduced.

The block diagram of the Example of this invention. Similarly, the block diagram of another Example. The block diagram of the Example which similarly uses a nonwoven fabric. Similarly the expanded sectional view which abbreviate | omitted a part of practical example. The graph of the result of a formaldehyde gas deodorization test. Similarly graph of ammonia gas deodorization test results.

Claims (5)

Water is added so that the sum of 10% to 90% (mass) of the fine particle deodorizer and 90% to 10% (mass) of organic fiber is 0.5% to 20% (mass) Add a suitable amount of flocculant and fixing agent to this and mix with stirring, and after making the organic fiber and the fine particle deodorant floc, pass it through a filter, Deodorized paper in which the coagulated size of organic fibers is sized and dissociated, and then paper is made and dried by heating to firmly bond the deodorizer and organic fibers . 2. The deodorizing paper according to claim 1, wherein the deodorizing agent is a fine powder of zeolite or activated carbon fine powder of 1 μm to 200 μm, either alone or as a mixture . The deodorizing paper according to claim 1 or 2 , wherein the organic fibers are pulp, used paper, other cellulose fibers or synthetic fibers . 4. The filter according to claim 1, wherein the filter is a filter having a hole diameter of 0.5 mm to 10 mm, or a filter having a slit having a gap of 0.5 mm to 10 mm and a length of 30 mm to 60 mm. Deodorizing paper. Water is added to 10% to 90% (mass) of fine particulate deodorizer and 90% to 10% (mass) of organic fibers to make a mixed solution of 0.5% to 20% concentration. A suitable amount of flocculant and fixing agent are added to and mixed with stirring, and after the organic fiber and the fine particle deodorant are flocated, the filter is forced to pass through to set the size of the deodorant and organic fiber by condensation. A method for producing a deodorizing paper, characterized in that after sizing and dissociation, paper is made, and this is heated and dried to firmly bond the deodorizing agent and the organic fiber.

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