JP5559719B2 - Deodorizing sheet - Google Patents

Description

  The present invention relates to a deodorizing sheet for performing deodorization in a bag or container for packaging, for example, Chinese medicine, pharmaceuticals, or health food.

  There are odors from these herbal medicines, pharmaceuticals, and health foods in the bags or containers that wrap herbal medicines, pharmaceuticals, or health foods. It drifts into This drifting odor is slight, but some people may have an “odour”. Also, the odor generated from one herbal medicine, medicine, or health food can be transferred to another herbal medicine, medicine, or health food in a bag or container, or the smell generated from other herbal medicine, medicine, or health food. Sometimes mixed, it becomes a more complex “odour”.

  Therefore, it is conceivable to put a deodorant for deodorization in such a herbal medicine, medicine, or health food packaging bag or container. Many proposals have been made in Patent Documents 1 to 3 and the like.

Japanese Patent No. 3699738, claims, paragraph 0016 Japanese Patent No. 3953717, claims, paragraph 0009 Japanese Patent No. 4223534 publication, claims, FIG.

  The “deodorizing sheet” described in Patent Document 1 was made for the purpose of “providing a deodorizing sheet that does not drop activated carbon during processing of the deodorizing sheet and that does not deteriorate the deodorizing performance even after long-term use”. "A mixture of modified activated carbon and soap-free latex in a weight ratio of 70:30 to 95: 5 is attached to the porous sheet, and the modified activated carbon is made of copper, iron, gold, platinum, zinc, manganese. Activated carbon carrying at least one selected from metals such as aluminum, magnesium, nickel, cobalt, palladium, ruthenium, rhodium or oxides thereof (excluding zinc oxide) or chlorides. It is a deodorizing sheet characterized.

  However, since this deodorizing sheet is “a mixture of the modified activated carbon and soap-free latex in a weight ratio of 70:30 to 95: 5 attached to the porous sheet”, the deodorizing sheet is placed in a packaging container. There is a possibility that the modified activated carbon or soap-free latex may contaminate Chinese medicine, pharmaceuticals, or health foods.

  On the other hand, the “planar encapsulated deodorizing sheet and manufacturing method” of Patent Document 2 describes that “in a planar encapsulated deodorizing sheet in which a deodorizing agent is encapsulated in two base sheet sheets, the internal deodorizing agent is a cut surface or a folded surface. It is made for the purpose of "providing a flat encapsulated deodorizing sheet with improved powder-off properties that does not fall off from", and consists of "base A, base B and a deodorizing agent enclosed therebetween" In the flat encapsulated deodorizing sheet, the deodorizing agent is granular or powdery, and the deodorizing agent is disposed at regular intervals on the inner surface of the planar encapsulating deodorizing sheet and a region where the deodorizing agent is not disposed is provided. It is based on a “planar enclosed deodorizing sheet”.

  However, in the “planar encapsulated deodorizing sheet” of Patent Document 2, an area where the deodorizing agent is disposed at regular intervals and an area where the deodorizing agent is not disposed are provided on the inner surface of the planar encapsulating deodorizing sheet. Therefore, it may be difficult to manufacture and cost.

  The “deodorizing sheet and honeycomb type filter” of Patent Document 3 is made for the purpose of “providing a deodorizing sheet with excellent removability of all kinds of malodorous gases and with excellent processability and formability”. "Porous inorganic material mixed sheet and activated carbon mixed sheet were used to place the porous inorganic material mixed sheet on one side and the activated carbon mixed sheet on the other side, and both the sheets were thermocompression bonded together. It was a “special sheet”. If this configuration is adopted, “the activated carbon can adsorb a wide range of malodorous components, and if the compatibility of the activated carbon and the porous inorganic material for one adsorbent is different, the adsorbent is added to the better compatible one. It is possible to provide a sheet that can handle all types of malodorous components with a single sheet. "

  However, since the “deodorizing sheet and honeycomb filter” of Patent Document 3 has a shape as shown in FIG. 7, it becomes very bulky and is used for packaging herbal medicines, pharmaceuticals, or health foods. It cannot be put in a bag or container.

In any case, the traditional desiccant or sheet is placed in a bag or container that wraps herbal medicines and medicines, or health foods such as medicines and sweets, and smells from herbal medicines and medicines or health foods. It was not preferable for deodorizing. In other words, the following can be used to deodorize odors from herbal medicines, medicines, or health foods by placing them in a bag or container that wraps herbal medicines, medicines, or health foods such as medicines and sweets. It is necessary to satisfy a certain condition.
(1) Since it is deodorized in a packaging bag or packaging container, it must be thin and small. (2) Hygiene that does not contaminate adjacent Chinese herbs, pharmaceuticals, or health foods with deodorants. (3) Easy to manufacture and low cost (4) Not to be confused with the contents

  Therefore, the present inventor has completed the present invention as a result of various studies on how to satisfy the conditions (1) to (4) described above for this type of deodorizing sheet. is there.

  This invention is made | formed in view of the above actual condition, The subject which it is going to solve is making the sheet for deodorizing more effective at low cost.

  In other words, the object of the present invention is to be thin and small, hygienic, cost-effective, and confused with the contents of herbal medicines and medicines or health foods. An object of the present invention is to provide a deodorizing sheet that does not invite.

In order to solve the above problems, first, the means taken by the invention according to claim 1 will be described with reference numerals used in the description of the embodiments described later.
“A sheet for deodorization in which films 20 and 20 are integrated on both sides of the composite paper 10,
The composite paper 10 is formed by a papermaking technique so as to be composed of 5 to 60% by weight of granular activated carbon 12 and the remaining paper fiber 11 in a dry weight, and is formed into a sheet having a thickness of 0.3 mm to 4.0 mm. ,
An inner film 21 that is softened or melted at the time of thermocompression bonding and bonded to the composite paper 10 side, and an outer film 22 that has a higher melting point than the inner film 21 and is integrated outside the inner film 21. Configure
It turned into integral film 20 in Table back both sides so that the end face 13 of the double slip sheet 10 is exposed, deodorizing sheet, characterized in that the touching to the outside air at least the end face 13 "
It is.

  That is, the deodorizing sheet according to claim 1 has a basic form in which the films 20 and 20 are integrated on both the front and back surfaces of the composite paper 10 as shown in FIG. 1 (a) and FIG. However, the composite paper 10 is formed by a papermaking technique. In other words, the composite paper 10 is formed by papermaking a slurry in which paper fibers 11, granular activated carbon 12, and necessary papermaking components are dispersed using a paper machine, and in particular, the granular activated carbon 12 is 5 in dry weight. ˜60% by weight, with the remainder being paper fibers 11. Thus, if the composite paper 10 is formed by papermaking technology, the composite paper 10 can be continuously formed in a short time, and as a result, the entire deodorizing sheet can be manufactured at a very low cost. is there.

  The reason why the granular activated carbon 12 constituting the composite paper 10 needs to be 5 to 60% by weight in terms of dry weight is that if it is less than 5% by weight, deodorization by the granular activated carbon 12 cannot be performed sufficiently, If the amount is more than 60% by weight, it is difficult to hold the paper fiber 11, and the granular activated carbon 12 is easily dropped from the deodorizing sheet. Among them, the granular activated carbon 12 constituting the composite paper 10 is preferably 10 to 40% by weight in terms of dry weight because it has the best balance.

  In addition, the raw sheet consisting of the granular activated carbon 12 and the remaining paper fiber 11 needs to be dried to form a sheet having a thickness of 0.3 mm to 4.0 mm as in the papermaking technology. The reason is that if the thickness is less than 0.3 mm, not only can the amount of granular activated carbon 12 necessary for deodorization be sufficiently secured, but also other items such as a bag or a manual in the container in which the deodorizing sheet is placed. This is because the distinction cannot be made. On the other hand, if the thickness of the sheet is greater than 4.0 mm, not only is it difficult to form a sheet, but the entire deodorizing sheet becomes too thick and bulky, meaning that the sheet is no longer meaningful.

  Furthermore, this deodorizing sheet needs to integrate the film 20 on both the front and back surfaces of the composite paper 10 constituting the sheet. When integrating each film 20 with the composite paper 10, various methods such as using an adhesive or using the softening or melting of the film 20 when the film 20 is thermocompression bonded to the composite paper 10 are used. Means can be applied. In other words, the film 20 itself to be integrated on both the front and back sides of the composite paper 10 does not necessarily need to be softened or melted by the above-described hot press, and is, for example, a polypropylene film or an aluminum foil. It will be good.

  The reason why the film 20 must be integrated on both the front and back sides of the composite paper 10 is to prevent the granular activated carbon 12 in the composite paper 10 from falling off. In addition, as shown in FIG. 2 or FIG. 3, the film 20 can be subjected to printing 23 such as a product name of the deodorizing sheet and a cautionary note.

  And this deodorizing sheet | seat is what contacts external air at least in the end surface 13, as shown also in FIG.1 and FIG.2. The end surface 13 of the deodorizing sheet has a large number of complicated hole ends in the composite paper 10 formed in a mesh shape and very small by the paper fibers 11, and the outside air passes through these many openings in the outside air. This “smell” is adsorbed by the granular activated carbon 12 in the composite paper 10. That is, the deodorizing sheet is deodorized from the end face 13.

  The end face 13 automatically appears as shown in FIGS. 1A and 1B by cutting a deodorizing sheet composed of the composite paper 10 and the film 20 having a large area into a predetermined size. The deodorizing sheet as shown in FIG. 5 does not have to be a deodorizing sheet in which the cuts 24 are formed in the film 20 or a deodorizing sheet in which the cuts 16 are formed as shown in FIG. This is where the deodorizing function of the internal granular activated carbon 12 is exhibited. In other words, even if the notch 24 shown in FIG. 5 and the notch 16 shown in FIG. 6 are not provided, the deodorizing function can be exhibited only by the presence of the end face 13. It means “at least”.

Therefore, deodorant sheet of claim 1, in the first place, a hygienic and can be smaller and rather thin, it is possible to reduce the cost, yet Chinese medicine, pharmaceuticals or health food, There is no confusion with it.

And about this sheet for deodorizing, the film 20 is softened or melted at the time of thermocompression bonding, and the inner film 21 is bonded to the composite paper 10 side, and the melting point is higher than the inner film 21, The outer film 22 is integrated.

That is, in the deodorizing sheet according to claim 1, as shown in FIGS. 3 (a) and 3 (b), the film 20 is softened or melted during thermocompression bonding and bonded to the composite paper 10 side. 21 and an outer film 22 having a melting point higher than that of the inner film 21 and integrated with the outer side of the inner film 21.

The inner film 21 constituting the film 20 is softened or melted when the film 20 is thermocompression bonded to both the front and back surfaces of the composite paper 10, and is bonded to the composite paper 10 side by this softening or melting. Is. This is because the softened or melted inner film 21 is entangled with at least the paper fibers 11 constituting the composite paper 10 and the outer film 22 on the outer side is held.

Of course, when the inner film 21 is softened or melted, the outer film 22 is not softened or melted, and the form as the film is maintained. For this reason, at the time of this thermocompression bonding, the film 20 does not adhere to the hot plate, and the thermocompression work can be performed smoothly.

As a result of the above, the film 20 can be simply applied to the surface of the composite paper 10 by thermocompression bonding, not only when the organic binder is mixed in the composite paper 10 but also when the organic binder is not mixed. Integration with the composite paper 10 is achieved by the means.

Therefore, secondly, the deodorizing sheet according to the first aspect can more easily integrate the film 20 with the surface of the composite paper 10.

Further, in order to solve the above-mentioned problems, the means taken by the invention according to claim 2
“Composite paper 10 contains 1 to 20% by weight of synthetic resin fiber 14 which is softened or melted by hot pressing”
It is that.

  The deodorizing sheet according to claim 2 is, as shown in FIG. 3B and FIG. 4, as a constituent material of the composite paper 10, 1 to 20% by weight of a synthetic resin fiber 14 that is softened or melted by hot pressing. Is different from that according to the first aspect. Therefore, in the following, only the description centering on the synthetic resin fiber 14 will be given, and the same reference numerals are used for the composite paper 10, the paper fiber 11, the granular activated carbon 12 and the end face 13 in FIG. These detailed explanations are omitted as shown in FIG.

  That is, the deodorizing sheet according to claim 2 is obtained by integrating the film 20 on both the front and back surfaces of the composite paper 10 in the same manner as the deodorizing sheet of claim 1 described above. Means for adhering the granular activated carbon 12 to the paper fiber 11 is devised as follows.

  That is, in this deodorizing sheet, synthetic resin fibers 14 that are softened or melted by hot pressing are mixed in the composite paper 10 that should hold the granular activated carbon 12, and the synthetic resin fibers 14 are made of adhesive by hot pressing. It is intended to play a role. That is, the synthetic resin fiber 14 is softened or melted by heat at the time of hot pressing, thereby bonding the composite paper 10 and the film 20 on both sides of the front and back, and bonding the granular activated carbon 12 to the paper fiber 11. It plays the role of an agent.

  The amount of the synthetic resin fiber 14 needs to be 1 to 20% by weight. When the amount of the synthetic resin fiber 14 is 1% by weight or less, the adhesion of the granular activated carbon 12 to the paper fiber 11 is not good, and not only the granular activated carbon 12 is easily dropped from the composite paper 10, This is because the film 20 cannot be sufficiently bonded to the composite paper 10, that is, cannot be integrated. On the contrary, if the amount of the synthetic resin fiber 14 is more than 20% by weight, the synthetic resin fiber 14 softened or melted by heat at the time of hot pressing not only easily fills the gap in the composite paper 10, but also the granular activated carbon 12 This is because the holding space is relatively reduced and the odor absorbing space or odor passage space in the composite paper 10 is reduced, so that the function as a deodorizing material cannot be sufficiently achieved. Among them, the amount of the synthetic resin fiber 14 in the base paper composed of the paper fiber 11 and the synthetic resin fiber 14 is most preferably about 10% by weight.

  As shown in FIG. 4, the synthetic resin fibers 14 partially appear on both the front and back surfaces of the composite paper 10 formed by the papermaking technique. The other portions of the synthetic resin fibers 14 are the paper fibers 11 and the granular shapes. The composite paper 10 is entangled with the activated carbon 12. Therefore, if the synthetic resin fibers 14 are softened or melted when the film 20 is pressed against both the front and back surfaces of the composite paper 10 by hot pressing, the synthetic resin fibers 14 on the surface side of the composite paper 10 in particular are The film 20 is adhered, and the film 20 is integrated on both the front and back surfaces of the composite paper 10. Of course, since the granular activated carbon 12 is also bonded to the paper fiber 11 at this time, the granular activated carbon 12 is prevented from falling off from the composite paper 10.

  As shown in FIG. 3B and FIG. 4, the inner surface of the film 20 can be printed 23 for various displays. That is, in the completed deodorizing sheet, the print 23 can be inside or inside the film 20, and even if the herbal medicine or candy touches the deodorizing sheet, the ink on the print 23 remains on the food side. Can be eliminated. In addition, when such a print 23 is made on the inner surface, the print 23 is not made on the entire inner surface of the film 20, so that there is a sufficient adhesion portion of the softened or melted synthetic resin fiber 14 serving as an adhesive. It is secured.

  Further, as will be described later, the film 20 may have a double structure of an inner film 21 and an outer film 22 integrated on the outer side thereof, but may be a single layer. In addition to simplifying the production of the deodorizing sheet, commercially available products can be used sufficiently, and as a result, the cost of the entire deodorizing sheet can be greatly reduced.

  In addition, since this film 20 must pass an odor through the inner composite paper 10, for example, the film 20 may have a certain degree of air permeability by increasing the degree of stretching, or if the degree of stretching is low. Alternatively, it may have a large number of air holes or may be formed with cuts 24 as shown in FIG.

  Therefore, the deodorizing sheet of claim 2 exhibits the same function as that of claim 1, and the integration of the film 20 on both the front and back surfaces of the composite paper 10 and the adhesion of the granular activated carbon 12 to the paper fiber 11. Thus, the granular activated carbon 12 is prevented from falling off the composite paper 10, and the printing 23 can be formed on the inner side.

In order to solve the above problem, the means taken by the invention according to claim 3 is the deodorizing sheet according to claim 1 or 2,
“The composite paper 10 further includes an organic binder made of 1 to 10% by weight of a synthetic resin.”
It is.

  As shown in FIG. 2, the organic binder actively adheres the granular activated carbon 12 to the paper fiber 11 in the composite paper 10. That is, this organic binder becomes a slurry raw material together with the paper fibers 11 and the granular activated carbon 12 when the composite paper 10 is formed by the paper making technique. After the paper making, the adhesion between the paper fibers 11 and the granular activated carbon 12 Further, these are bonded to the synthetic resin fibers 14.

  The organic binder must be contained in the composite paper 10 in an amount of 1 to 10% by weight in both the case of the deodorizing sheet of claim 1 and the case of the deodorizing sheet of claim 2. In the case of the sheet, the composite paper 10 is composed of this amount of the organic binder, 5 to 60% by weight of the granular activated carbon 12 in dry weight, and the remaining paper fiber 11. The composite paper 10 is composed of the binder, 1 to 20 wt% of the synthetic resin powder 14, 5 to 60 wt% of the granular activated carbon 12 and the remaining paper fiber 11 in terms of dry weight.

  The amount of the organic binder made of this synthetic resin must be 1 to 10% by weight in the composite paper 10. The reason is that if the amount of the organic binder is less than 1% by weight, This is because falling off of the activated carbon 12 from the composite paper 10 cannot be sufficiently prevented. On the other hand, when the amount exceeds 10% by weight, the organic binder clogs the fine pores of the granular activated carbon 12, and the activated carbon 12 is caused by the granular activated carbon 12. This is because the possibility of inhibiting the deodorizing effect is increased.

  As described above, since the organic binder adheres the granular activated carbon 12 to the paper fiber 11, the granular activated carbon 12 does not easily fall off the composite paper 10. In other words, when the deodorized sheet is manufactured, the granular activated carbon 12 does not fall off and adhere to the other. Therefore, the granular activated carbon 12 does not pollute the surroundings and is hygienic. . Of course, even when completed as a deodorizing sheet, this organic binder prevents the granular activated carbon 12 from falling off from the end face 13, so that it has a function not to pollute herbal medicine, pharmaceuticals, health foods as well as the surroundings. Have.

  Therefore, the deodorizing sheet according to claim 3 exhibits the same function as that of claim 1 or 2 and also positively adheres the granular activated carbon 12 to the paper fiber 11 due to the presence of the organic binder. It is.

In order to solve the above problems, the means taken by the invention according to claim 4 is the deodorizing sheet according to claims 1 to 3,
“The granular activated carbon 12 has an average particle diameter of 1 to 50 microns.”
It is.

  Each granular activated carbon 12 has a large number of micropores for adsorbing odors, but these micropores adsorb odors in the outside air unless they are open on the surface side. Can not. These fine pores communicate with the inside of each granular activated carbon 12, and the smaller the total volume of the fine pores in each granular activated carbon 12 with respect to the surface area of the granular activated carbon 12, the more effective the adsorption of odors. The In other words, each granular activated carbon 12 effectively adsorbs odor as the specific surface area increases or the average particle diameter decreases.

  Therefore, in the deodorizing sheet according to claim 4, the deodorizing function is enhanced by adopting the granular activated carbon 12 having an average particle diameter of 1 to 50 microns. The average particle size of each granular activated carbon 12 needs to be 1 to 50 microns. First, if the average particle size of each granular activated carbon 12 is smaller than 1 micron, the entanglement with the paper fibers 11 may be good. This is because the granular activated carbon 12 having a very high price is used, and the deodorizing sheet itself cannot be made inexpensive.

  On the other hand, when the average particle diameter of each granular activated carbon 12 is larger than 50 microns, the entanglement with respect to the paper fiber 11 does not become good, and it is easy to fall off, and the Chinese medicine, the medicine, or the health food is polluted. Because. In addition, the granular activated carbon 12 having an average particle size larger than 50 microns cannot sufficiently utilize the internal micropores for deodorization, and the deodorizing function of the entire deodorizing sheet is inferior.

  Therefore, the deodorizing sheet according to the fourth aspect exhibits functions similar to those of the first to third aspects and can further enhance the deodorizing function.

The above organic binder is like the invention according to claim 5,
"The organic binder is an acrylic resin or latex"
It can be.

  Since an organic binder made of acrylic resin or latex can be obtained at low cost, the paper fiber 11 and the granular activated carbon 12 can be bonded at low cost.

Therefore, deodorization sheet according to claim 5 which employs an organic binder composed of the acrylic or latex, cheaper by the organic binder, Ru Nodea the granular activated carbon 12 has become that hardly a effective shedding.

As described above in detail, in the present invention, as illustrated in the above embodiment,
“A sheet for deodorization in which films 20 and 20 are integrated on both sides of the composite paper 10,
The composite paper 10 is formed by a papermaking technique so as to be composed of 5 to 60% by weight of granular activated carbon 12 and the remaining paper fiber 11 in a dry weight, and is formed into a sheet having a thickness of 0.3 mm to 4.0 mm. ,
An inner film 21 that is softened or melted at the time of thermocompression bonding and bonded to the composite paper 10 side, and an outer film 22 that has a higher melting point than the inner film 21 and is integrated outside the inner film 21. Configure
Turned into integral film 20 in Table back both sides so that the end face 13 of the double slip sheet 10 is exposed, you have to touch the outside air at least the end face 13 "
The main features of its structure are that it can be made thin and small, is hygienic, can be reduced in cost, and can be used with herbal medicines, pharmaceuticals, or health food contents. confusion also without incurring, further, it is possible to provide a deodorizing sheet capable of performing integrated to the composite sheet 10 surface of the film 20 more easily.

That is, according to the deodorizing sheet according to the present invention,
(1) It was thin and small, suitable for deodorization by placing it in a packaging bag or packaging container. (2) Deodorant for herbal medicine, medicine or health food that would be adjacent. (3) Manufactured easily and at low cost. (4) To make a deodorizing sheet that does not cause confusion with the contents. It is an excellent effect that can satisfy all the requirements.

BRIEF DESCRIPTION OF THE DRAWINGS The deodorizing sheet which concerns on this invention is shown, (a) is a perspective view at the time of making an external shape square, (b) is a perspective view which made the external shape circular. It is an expanded longitudinal cross-sectional view of the sheet for deodorizing shown in FIG. The deodorizing sheet is partially enlarged, (a) is a partially enlarged longitudinal sectional view of the deodorizing sheet according to claim 1, and (b) is a partially enlarged longitudinal sectional view of the deodorizing sheet according to claim 2. It is. 3 is a partially enlarged exploded sectional view showing a state in which both films 20 are being pressure-bonded to the composite paper 10 as a deodorizing sheet according to claim 2. FIG. The other Example of the sheet | seat for the same deodorizing is shown, (a) is a perspective view, (b) is the elements on larger scale of the 1-1 line part of (a). The further another Example of the sheet for deodorizing is shown, (a) is a perspective view, (b) is the elements on larger scale of the 2-2 line part of (a). It is a perspective view of the sheet for deodorizing shown by patent documents 3.

Next, the deodorizing sheet as an embodiment shown in the drawings of the invention according to each claim configured as described above will be described. FIG. 1 and FIG. 2 show the deodorizing sheet according to claim 1 and to, respectively that of the FIG. 3 (a) and (b) shows partially enlarged cross-sectional view of a deodorizing sheet according to claim 1 and claim 2.

  The deodorizing sheet shown in FIG. 1 is obtained by integrating the film 20 on both the front and back sides of the composite paper 10 located in the center as shown in FIGS. 2 and 3A. Is manufactured by dispersing paper fibers 11 and granular activated carbon 12 in a slurry and paper-making them by paper-making technology. In other words, the composite paper 10 is basically formed by papermaking a slurry in which paper fibers 11 and granular activated carbon 12 are dispersed by a paper machine. The amount is 60% by weight, and the remainder is paper fiber 11.

  As the material of the paper fiber 11, pulp typified by so-called paper pulp is used, and this pulp is natural cellulose fiber such as NBKP, LBKP, linter (cotton) pulp or the like.

  The granular activated carbon 12 constituting the composite paper 10 preferably has a smaller average particle diameter, but in the present embodiment, one having a particle size of 1 to 50 microns is adopted. In particular, in this embodiment, it can be obtained at a relatively low cost, the deodorizing function is effective, and the deodorizing sheet itself can be formed into a sheet, that is, sufficient entanglement with the paper fiber 11 can be easily performed by a general papermaking technique. For this reason, a micron of 1 to 50 microns was adopted. Examples of activated carbon that can be granulated to this extent include coconut shell activated carbon and charcoal.

  The granular activated carbon 12 constituting the composite paper 10 needs to have a dry weight of 5 to 60% by weight, because the deodorizing by the granular activated carbon 12 cannot be sufficiently performed when the amount is less than 5% by weight. If the amount is more than 60% by weight, the retention by the paper fibers 11 is difficult to complete, and the granular activated carbon 12 is easily dropped from the deodorizing sheet. Among these, when the content of the granular activated carbon 12 constituting the composite paper 10 is 10 to 40% by weight in terms of dry weight, it has a sufficient deodorizing function and very little dropping off, and the most balanced one. became.

  Further, the raw sheet consisting of the granular activated carbon 12 and the remaining paper fibers 11 is dried as in the papermaking technology. In that case, the amount of granular activated carbon 12 necessary for deodorization can be sufficiently secured, and the sheet In order to prevent the sheet from becoming too thick and bulky, the sheet was formed into a sheet having a thickness of 0.3 mm to 4.0 mm. In particular, when the thickness was made into a sheet shape of 1.2 mm to 3.5 mm, the sheet had a sufficiently preferable rigidity as a deodorizing sheet.

  Furthermore, the deodorizing sheet of this embodiment was formed by integrating films 20 on both the front and back surfaces of the composite paper 10 as shown in FIGS. 1 and 2. When integrating each film 20 with the composite paper 10, various methods such as using an adhesive or using the softening or melting of the film 20 when the film 20 is thermocompression bonded to the composite paper 10 are used. Means can be applied. The reason why the film 20 is integrated on both the front and back surfaces of the composite paper 10 is to prevent the granular activated carbon 12 in the composite paper 10 from falling off.

  The film 20 may simply be a single sheet. In this embodiment, polypropylene is used. However, the film 20 may be a polyethylene terephthalate (PET) sheet or an aluminum foil. It is. In addition, the film 20 is conveniently provided with air permeability. For this purpose, microfilm is formed in the film 20 by increasing the degree of stretching of the film 20 itself, or by punching or inserting a needle. Or forming the cuts 16 into the cuts 24 and the entire sheet for deodorization.

  In order to sufficiently utilize the softening or melting of the film 20 itself when the film 20 is thermocompression bonded to the composite paper 10, as shown in FIGS. It is good to comprise by the inner film 21 softened or fuse | melted at the time of thermocompression bonding and adhere | attached on the composite paper 10 side, and the outer film 22 whose melting | fusing point is higher than this inner film 21, and is integrated on the outer side of the inner film 21.

  The inner film 21 is softened or melted when the film 20 is thermocompression-bonded to both the front and back surfaces of the composite paper 10, and is entangled with at least the paper fibers 11 constituting the composite paper 10, and holds the outer film 22 on the outer side. Will remain. When the inner film 21 is softened or melted, the outer film 22 is not softened or melted, and the form as the film is maintained. For this reason, at the time of thermocompression bonding of the film 20, the film 20 does not adhere to the hot plate, and the thermocompression work can be performed smoothly.

  Further, as shown in FIG. 3, the film 20 is provided with a print 23 such as a trade name or a cautionary note of the deodorizing sheet. The film 20 is integrated with the composite paper 10. At this time, the print 23 is set on the inner side. Since the film 20 when the printing 23 is applied on the inside needs to be transparent or translucent, in that case, the material of the film 20 is polypropylene (the softening temperature of the synthetic resin fiber 14 or the organic binder in the composite paper 10). A synthetic resin material having a higher softening temperature may be employed. Of course, when the film 20 is formed by the inner film 21 and the outer film 22, as shown in FIGS. 3A and 3B, the inner side of the inner film 21 or the outer film 22 is used. It is preferable to form the print 23.

  The temperature of the hot press for integrating the film 20 on both the front and back surfaces of the composite paper 10 is 80 to 200 degrees, but this temperature is such that the inner film 21 is softened or melted, for example, 80 degrees to It is appropriately adjusted to 150 degrees.

  And this deodorizing sheet | seat is what contacts external air at least at the end surface 13, as shown also in FIG. The end surface 13 of the deodorizing sheet has a large number of complicated hole ends in the composite paper 10 formed in a mesh shape and very small by the paper fibers 11, and the outside air passes through these many openings in the outside air. This “smell” is adsorbed by the granular activated carbon 12 in the composite paper 10. That is, the deodorizing sheet is deodorized from the end face 13.

  As shown in FIGS. 1A and 1B, the end surface 13 is formed by cutting a deodorizing sheet made of a composite paper 10 and a film 20 having a large area into a predetermined size. Automatically appear as square or circular. On the end face 13 that is positively formed on the deodorizing sheet, granular activated carbon 12 for deodorizing may appear directly, but rather, it is formed between the paper fiber 11 and the granular activated carbon 12. It is important that a large number of openings in the space are exposed from the end face 13. This is because the outside air can come into contact with each granular activated carbon 12 present in the composite paper 10 through the openings opened in these end faces 13, and the deodorization by each granular activated carbon 12 is caused by these. This is because it is effectively done through the opening.

  In addition, as shown in FIG. 5, you may implement as a deodorizing sheet | seat which formed the notch 24 in the film 20, or a deodorizing sheet | seat which formed the notch | incision 16 as shown in FIG. . The notch 24 is intended to further expose the end face 13 of the composite paper 10 that is not the cut end face from the film 20 of the deodorizing sheet, and further exhibits the deodorizing function by the granular activated carbon 12 inside the deodorizing sheet. It is. Further, the cut 16 shown in FIG. 6 is formed by punching or the like at the same time as cutting the outer shape after the film 20 is integrated with the composite paper 10, and the end surface of the composite paper 10 is exposed to the outside air from the cut 16. You will face it.

  3 (b) and FIG. 4, the composite paper 10 has a dry weight of 5 to 60% by weight of granular activated carbon 12, and 1 to 20% by weight of a synthetic resin fiber 14 that is softened or melted by hot pressing. And the embodiment of the sheet | seat for a deodorizing formed by the papermaking technique so that it may consist of remaining paper fiber 11 and made into the sheet form whose thickness is 0.3 mm-4.0 mm is shown.

  Synthetic resin fibers 14, paper fibers 11, and granular activated carbon 12 were dispersed in a slurry, and composite paper 10 was made from the slurry by a normal paper making method. In addition, when using the synthetic resin fiber 14, 0.3 weight% of polymer coagulants are added in a slurry.

  The composite paper 10 may further contain an organic binder made of 1 to 10% by weight of a synthetic resin. This is because the organic binder can more positively adhere the granular activated carbon 12 to the paper fiber 11 in the composite paper 10 as shown in FIG. In other words, this organic binder can be used to bond the paper fibers 11 and the granular activated carbon 12 after the paper making, if these are used as the slurry raw material together with the paper fibers 11 and the granular activated carbon 12 when the composite paper 10 is formed by the paper making technique. And the synthetic resin fiber 14 can be bonded.

The composite paper 10 thus made was squeezed out of moisture by applying a pressure machine to obtain a raw sheet having a thickness of 0.5 to 5 mm, and the raw sheet was deodorized by using a deodorizer .

DESCRIPTION OF SYMBOLS 10 Composite paper 11 Paper fiber 12 Granular activated carbon 13 End surface 14 Synthetic resin fiber 15 Exposed surface 16 Notch 20 Film 21 Inner film 22 Outer film 23 Printing 24 Notch

Claims (5)

It is a sheet for deodorization in which films are integrated on both sides of the composite paper,
The composite paper is formed by a papermaking technique so as to consist of 5 to 60% by weight of granular activated carbon in dry weight and the remaining paper fiber, and is formed into a sheet having a thickness of 0.3 mm to 4.0 mm.
The film is composed of an inner film that is softened or melted at the time of thermocompression bonding and bonded to the composite paper side, and an outer film that has a higher melting point than the inner film and is integrated on the outside of the inner film,
The turned into integrally the full Irumu Table back both sides so that the end face of the double slip sheet is exposed, deodorizing sheet, characterized in that the touching to the outside air at least the end face.   2. The deodorizing sheet according to claim 1, wherein the composite paper includes 1 to 20 wt% of a synthetic resin fiber that is softened or melted by hot pressing.   The deodorizing sheet according to claim 1, wherein the composite paper further includes an organic binder made of 1 to 10% by weight of a synthetic resin.   The deodorizing sheet according to any one of claims 1 to 3, wherein the granular activated carbon has an average particle diameter of 1 to 50 microns. The deodorizing sheet according to claim 3, wherein the organic binder is an acrylic resin or latex.

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