JP2005185231A - Deodorizing sheet for pet animal - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a deodorizing agent and a deodorizing sheet for a pet, having durable and excellent deodorizing effect on disagreeable odor such as the body smell of the pet, feces and odor generated from the keeping environment of the pet, or the like, such as ammonia, mercaptans, hydrogen sulfide, amines, butyric acid, acetic acid, indole, skatole and aldehydes, and disposable by incineration. <P>SOLUTION: The deodorizing sheet is produced by supporting a non-alkaline lignin sulfonic acid salt composition on a porous carrier such as a cellulosic carrier. The sheet having excellent deodorizing power and easy handleability is produced by this method. <P>COPYRIGHT: (C)2005,JPO&NCIPI

Description

  The present invention has various odors derived from pets such as dogs and cats living in the same living space as human beings, and particularly has an excellent deodorizing effect against bad odors and is an environmentally friendly deodorant for pets that can be easily disposed of. The present invention relates to a deodorizing method using the sheet and the pet deodorizing sheet.

  In recent years, pet booms have increased the number of pets living in the same living space as humans, expanded use of accommodation facilities and multipurpose facilities with pets, increased airtightness of living spaces due to life maturity, amenity-oriented life Due to the spread of styles, etc., it is necessary to deal with odors caused by pets. Therefore, development of a deodorizing sheet for pets that has a high deodorizing and deodorizing effect and is inexpensive is desired.

The deodorizing sheet for pets is composed of a porous carrier, for example, a non-woven fabric impregnated with a carrier or a carrier containing a deodorizing liquid, and is easy to handle, but when the amount of the deodorizing agent impregnated is increased. If the deodorizing agent is a liquid product, the drug oozes out, and if the deodorizing agent is a solid, there is a lack of powder and the amount of the deodorant contained is limited.
In addition, as a deodorant for pets, livestock and humans,
A method of using a gel-like substance such as agar containing a meat scented component, pineapple, orange or carrot extract (for example, Patent Document 1)
A method of transferring alcohol to propionic acid, n-butyric acid, n-valeric acid, i-valeric acid, which is a malodorous component, containing lipase and alcohol having lower fatty acid esterification activity (for example, Patent Document 2)
A method of obtaining a deodorant by mixing a wood extract and a fragrance with alginic acid, gelling with calcium chloride, further crosslinking with glutaraldehyde, and enclosing the wood extract and fragrance in the gel (for example, Patent Document 3)
A method using a deodorizing sheet in which a dry powder containing wood vinegar is sandwiched between two nonwoven fabrics (for example, Patent Document 4)
A mousse or spray deodorant using a flavonoid having a deodorizing effect (for example, Patent Document 5)
A method of using an active ingredient of wheat bran extract with an aqueous solution containing an organic acid such as lactic acid or citric acid as a deodorant (eg, Patent Document 6)
A method using a deodorant containing alkali metal hydrogen carbonate and alum as active ingredients (for example, Patent Document 7)
Cleaning and disinfecting disinfecting solution in which sodium chloride, potassium peroxide monosulfate, cationic surfactant, and plant enzyme are added to deodorant components mainly composed of wood vinegar and humus soil extract (for example, Patent Document 8)
As a method of using lignin sulfonic acid, as a first stage generated in sludge etc., ammonia and amines are removed by washing complex malodorous gas with citric acid, acetic acid, etc., and lignin sulfone adjusted to alkali as the second stage. A method of removing sulfur compounds such as mercaptans by treating with an acid solution is known (for example, Patent Document 9).
There are known deodorants obtained by drying lignin-containing materials such as sawdust, chips, peat moss, and bark as they are or after containing about 30 to 50% dilute sulfuric acid in a volume ratio of about 30 to 50%. (For example, Patent Document 10)
JP-A-6-261646 JP-A-9-225015 JP 5-168363 Japanese Patent Laid-Open No. 5-23027 JP 2000-354623 A JP-A-6-125972 JP 7-163641 A JP-A-11-29423 JP 4-54844 JP 53-14187

  Moreover, what is called a masking method using the aroma of a fragrance | flavor is also used for the deodorant for pets and the deodorizing sheet for pets which are marketed generally. However, these are suitable for a relatively low concentration of malodorous gas, but when the malodor is strong, there are many cases where the odor component is combined and the discomfort is increased.

  In the case of conventional pet deodorant sheets, when the sheet is impregnated with a drug, the impregnated drug begins to drip, resulting in a lack of powder and the like. I could not say. In terms of deodorizing effect, complex malodors such as ammonia, mercaptans, hydrogen sulfide and other sulfur-based amines, butyric acid, acetic acid, indole, skatole or aldehydes can be easily and efficiently deodorized. No deodorant has been known that has sustainability, is advantageous in terms of cost, and has a small environmental impact at the time of disposal. Even in the method using lignin sulfonic acid (Japanese Patent Publication No. 4-5484), two-stage treatment is required as described above, and citric acid or the like is used for removing ammonia, hydrogen sulfide and mercaptans in the first stage. It is not an inexpensive method because it requires a large amount of organic acid. If a composite gas containing ammonia, hydrogen sulfide, and mercaptan is treated with lignin sulfonic acid on the alkali side (pH 9.5 to 10) according to this method, there is a high possibility that the odors will be increased.

  As a result of intensive studies on a pet deodorant sheet having strong deodorizing power and excellent durability, the present inventors have supported a lignin sulfonate whose aqueous solution is non-alkaline on a porous carrier, for example, a mesh. It has been found that by wrapping with a processed product, a deodorizing sheet for pets that exhibits an excellent deodorizing effect and is easy to handle can be obtained. In particular, in order to express the effect, it is achieved by using an acidic lignin sulfonate having an aqueous solution pH of 6 or less.

  A pet deodorant sheet obtained by supporting a non-alkaline lignin sulfonate composition on a porous carrier such as cellulose fiber, drying it, and covering it with a meshed nonwoven fabric, etc., is generated from the body odor, manure and living environment of the pet Ammonia, mercaptan, hydrogen sulfide, amines, butyric acid, acetic acid, indole, skatole, aldehydes and other odors are extremely effective and durable and can be easily discarded after use (eg incineration) Disposal is possible.

  The lignin sulfonate used in the present invention is obtained from a sulfite pulp cooking liquor produced as a by-product in a process (digestion process) of producing sulfite pulp using hardwood, softwood or mixed chips thereof as a raw material in consideration of economic aspects. It is desirable to separate and produce, but it can also be obtained from herbs. The sulfite pulp cooking methods include an acidic sulfite method, a bisulfite method, a slightly acidic sulfite method, and a neutral sulfite method, and the pH of the sulfite pulp cooking solution ranges from acidic to alkaline. As a method for obtaining lignin sulfonate from sulfite pulp cooking liquor, for example, calcium hydroxide is added, and dissolved lignin sulfonate is once fractionated as basic calcium lignin sulfonate, and then redissolved in minerals. A method of caulking, ultrafiltration membrane purification, and the like are known. In the present invention, the pH of the sulfite pulp cooking liquor can be adjusted as it is. The lignin sulfonate may be used as the lignin sulfonic acid itself, excluding salts by dialysis, ion exchange and the like.

  The structure of lignin sulfonic acid is a polyelectrolyte having a network structure having phenolic hydroxyl groups, carboxyl groups, etc. in addition to sulfone groups, and exhibits surface activity such as dispersibility and chelating properties (lignin chemistry: Uni Publication). As described above, the lignin sulfonate of the present invention is obtained by adjusting pH, concentration, purification, and base substitution and concentration as necessary, as necessary. The form of the salt of lignin sulfonate is not particularly limited, but is particularly limited as long as the salt can be formed from metals such as sodium, potassium, magnesium, calcium, iron, zinc, copper, aluminum, manganese, cobalt, and organic substances. However, any one of them or a mixture of them can be used. Further, these metals may form a complex. Among these, magnesium, calcium, and sodium are desirable in view of handling properties and cost.

  In the present invention, the pH of the lignin sulfonate is not particularly limited as long as the deodorizing effect is not reduced, but it may be non-alkaline, more preferably acidic pH. When the pH is too alkaline, the deodorizing effect of the malodorous substance is lowered, and the malodorous substance of the malodorous substance is increased, which is not preferable.

  Further, in the practice of the present invention, in addition to lignin sulfonate, water-absorbing agent, hygroscopic agent, insecticide, insect repellent, bactericidal agent, bacteriostatic agent, anti-fungal agent and the like, as well as existing deodorant or deodorant Substances such as activated carbon, silica gel, chlorine compounds (aluminum chloride, etc.), oxides (zinc white), ethylene glycols, boron compounds, amine substances (hexamine, etc.), metal ions (silver, copper, iron ions, etc.) ), Natural type (chlorophyll, plant extract, wood vinegar, etc.), etc. can be used in combination to enhance the function as a deodorizing sheet more synergistically. The blending amount of lignin sulfonate can be arbitrarily adjusted so as not to affect the deodorizing action.

  In the present invention, the term “support” refers to attaching, adsorbing, impregnating, chemical bonding, etc., lignin sulfonic acid or a salt thereof as it is to a porous carrier.

  The porous carrier means a carrier having a large number of pores, and there is no particular limitation on the pore diameter and shape, pore volume, pore density, specific surface area, and the like. Specifically, inorganic porous carriers such as activated carbon, zeolite, activated carbon fiber, silica gel, activated clay, alumina, diatomaceous earth, and organic polymer porous carriers such as pulp, fiber, paper, cloth, nonwoven fabric, wood, and wood powder Can be used arbitrarily. The material form at the time of use is also arbitrary.

  Among these carriers, considering that there is little addition to the environment at the time of disposal or disposal, it is particularly preferable that pulp, paper, fiber, cloth, nonwoven fabric, etc. mainly composed of cellulose, and mainly wood. Wood powder and chips.

  Examples of pulps include bleached or bleached pulp obtained by subjecting softwood and hardwood to sulfite pulping, kraft pulping, alkali pulping, mechanical pulping, or linter pulp, waste paper pulp, etc. . Since these are excellent in moisture retention, they are advantageous for impregnating lignin sulfonate.

  For example, a deodorizing sheet for pets formed by impregnating sulfite pulp with acid lignin sulfonate, drying, and covering with regenerated cellulose fiber is made of ammonia, melpeptane, hydrogen sulfide, amines, butyric acid, acetic acid , Indole, skatole, and aldehydes, etc., exhibiting an extremely excellent effect on deodorizing odors typified by, and having durability, and being incinerated after use, the disposal method is easy, and It is a deodorant that does not cause any problems even if it is used as a carbon source during livestock dung fermentation.

As an example of production of the above lignin sulfonate composition method, cellulose fibers previously added to a Nauta mixer type mixer are added and impregnated. The drying temperature after impregnation is not particularly limited, but it is sufficient to dry at 60 ° C. for about 1 day.
The constitutional ratio (parts by weight) of the lignin sulfonate composition and the carrier is not particularly limited as long as the deodorizing effect is not impaired and there is no significant separation from the carrier.

  It is desirable that the lignin sulfonate composition prepared as described above is impregnated with a regenerated cellulose fiber such as a nonwoven fabric or rayon, and is subjected to a mesh process with good air permeability. The mesh spacing is not particularly limited as long as it is smaller than the size of the cellulose fiber impregnated with the lignin sulfonate composition, and the mesh spacing is erased by wrapping the cellulose fiber impregnated with lignin sulfonate by an operation such as heat sealing. Handling of the odor sheet can be facilitated.

  The pet deodorant and pet deodorant sheet of the present invention are generated from pet living environment and pet excrement, such as ammonia, mercaptan, hydrogen sulfide, amines, butyric acid, acetic acid, indole, skatole, aldehydes, etc. The present invention provides a deodorizing sheet for pets which has a deodorizing effect excellent in deodorizing odors typified by the above and its sustainability, and is inexpensive and safe.

  The deodorizing sheet for pets of the present invention uses a repellent porous carrier such as cellulose fiber or activated carbon as a carrier, and can be incinerated after handling the role as a deodorant and is easy to handle.

[Action]
The pet deodorant sheet of the present invention eliminates malodors typified by ammonia, mercaptan hydrogen sulfide, amines, butyric acid, acetic acid, indole, skatole, aldehydes, etc. generated from pet breeding environment and pet excrement. It has a deodorizing effect excellent in odor and its sustainability, and is easy to handle.

  The reason why the deodorant of the present invention has an excellent deodorizing effect on the malodorous component is not clear, but the lignin sulfonate has a network shape having a sulfonic acid group, a phenolic hydroxyl group, a carboxyl group, and the like. It is considered that the polymer having the structure is important in order to exert its effect.

  Examples of the present invention will be specifically described below, but the present invention is not limited thereto. Odor was determined by a sensory test with eight panelists.

[Example 1]
After concentrating the sulfite pulp cooking liquid obtained by the hardwood Mg-based acidic sulfite cooking method with an evaporator, the pH was adjusted with caustic soda to obtain a lignin sulfonate having a solid content of 50%. The pH measured by diluting this lignin sulfonate to 5% solids was 4.0, and the salt forms were magnesium and sodium salts. 50 g of this lignin sulfonate (25 g in solid equivalent) was impregnated in 100 g of a hardwood-derived sulfite pulp sheet (trade name LTT, Nippon Paper Industries Co., Ltd.). Thereafter, the lignin sulfonic acid impregnated pulp was dried in a blow dryer at 60 ° C. for 24 hours, and then covered with a mesh-processed non-woven fabric, and both ends were prepared by heat sealing treatment.

[Example 2]
After concentrating the sulfite pulp effluent obtained by the conifer Ca-based acidic sulfite cooking method with an evaporator, the pH was adjusted with calcium hydroxide to obtain a lignin sulfonate having a solid content of 50%. The pH measured by diluting this lignin sulfonate to 5% solids was 4.5, and the salt form was a calcium salt. 50 g of this lignin sulfonate (25 g in solid equivalent) was impregnated in 100 g of a sulphite pulp sheet derived from conifers (trade name NT, Nippon Paper Industries Co., Ltd.). Thereafter, the same operation as in Production Example 1 was performed for preparation.

[Example 3]
After concentrating the sulfite pulp effluent obtained by the conifer Ca-based acidic sulfite cooking method with an evaporator, the pH was adjusted with potassium hydroxide to obtain a lignin sulfonate having a solid content of 50%. The pH measured by diluting this lignin sulfonate to 5% solids was 4.5, and the salt forms were sodium and potassium salts. 50 g of this lignin sulfonate (25 g in solid equivalent) was impregnated in 100 g of a sulphite pulp sheet derived from conifers (trade name NT, Nippon Paper Industries Co., Ltd.). Thereafter, the same operation as in Production Example 1 was performed for preparation.

[Comparative Example 1]
After concentrating the sulfite pulp effluent obtained by the hardwood Mg-based acidic sulfite cooking method with an evaporator, the pH was adjusted with caustic soda to obtain a lignin sulfonate having a solid content of 50%. The pH measured by diluting this lignin sulfonate to 5% solids was 10.0, and the salt forms were magnesium and sodium salts. 250 g of this lignin sulfonate (125 g in solid conversion) was impregnated in 500 g of a sulphite pulp sheet derived from conifers (trade name NT, Nippon Paper Industries Co., Ltd.). Thereafter, the same operation as in Production Example 1 was performed for preparation.

[Comparative Example 2]
After concentrating the sulfite pulp cooking liquid obtained by the hardwood Mg-based acidic sulfite cooking method with an evaporator, the pH was adjusted with caustic soda to obtain a lignin sulfonate having a solid content of 50%. The pH measured by diluting this lignin sulfonate to 5% solids was 4.0, and the salt forms were magnesium and sodium salts. The lignin sulfonate 0.5g (solid conversion 0.025g) was impregnated in hardwood derived sulfite pulp sheet (trade name LTT, Nippon Paper Industries Co., Ltd.) 400g. Thereafter, the same operation as in Production Example 1 was performed for preparation.

[Comparative Example 3]
It was prepared in the same manner as in Example 1 except that a commercially available wood vinegar solution (wood vinegar produced by Toyochu Co., Ltd.) was used.

[Comparative Example 4]
It was prepared in the same manner as in Example 1 except that lignin sulfonate was not used.

  Table 1 shows a list of constituent components of Examples 1 to 3 and Comparative Examples 1 to 4.

[Deodorization test 1]
Deodorizing effect of pet manure odor A deodorization test for odor derived from cat manure was performed.
300 g of the samples used in Examples 1 to 3 and Comparative Examples 1 to 4 were laid on a commercially available toilet pad for pets, and each adult cat fed the same food was allowed to defecate freely for 2 days. The odor was compared by sensory evaluation with 8 panelists. Sensory evaluation used the 6-step odor intensity | strength display method used for the malodor control standard etc. based on the malodor prevention method. The results are shown in Table 6. It turns out that Examples 1-3 are excellent in the deodorizing effect compared with Comparative Examples 1-4.

６段階臭気強度
０：無臭
１：やっと感知できるニオイ
２：何のニオイであるかがわかる弱いニオイ
３：らくに感知できるニオイ
４：強いニオイ
５：強烈なニオイ

6-level odor intensity 0: Odorless 1: Smell that can be finally detected 2: Weak odor that shows what odor is 3: Smell that can be easily detected 4: Strong odor 5: Strong odor

[Deodorization test 2]
Deodorizing effect of pet manure odor A deodorizing test was conducted for dog-derived odor.
Examples 1-3, respectively sample 300g was used in Comparative Examples 1 to 4 laid on a commercially available pet toilet pad and allowed free defecation 2 days beagle each one animal dogs fed the same diet, size 20 m ² The smell of the sealed space of 2m in height was compared by sensory evaluation with 8 panelists. Sensory evaluation used the 6-step odor intensity | strength display method used for the malodor control standard etc. based on the malodor prevention method. The results are shown in Table 6. It turns out that Examples 1-3 are excellent in the deodorizing effect compared with Comparative Examples 1-4.

６段階臭気強度
０：無臭
１：やっと感知できるニオイ
２：何のニオイであるかがわかる弱いニオイ
３：らくに感知できるニオイ
４：強いニオイ
５：強烈なニオイ

6-level odor intensity 0: Odorless 1: Smell that can be finally detected 2: Weak odor that shows what odor is 3: Smell that can be easily detected 4: Strong odor 5: Strong odor

Claims (4)

A pet deodorizing sheet comprising a porous carrier carrying lignin sulfonate. 2. The pet deodorizing sheet according to claim 1, wherein the main component of the porous carrier is cellulose. 3. The pet according to claim 1, comprising at least one drug selected from a water-absorbing agent, a hygroscopic agent, an acaricide, a bactericide, a bacteriostatic agent, an insecticide and an insecticide. Deodorant sheet. A method for deodorizing pet-derived odors using the deodorant sheet according to claim 1, 2 or 3.