JP2005279349A - Deodorizing water absorbent - Google Patents
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- JP2005279349A JP2005279349A JP2004093990A JP2004093990A JP2005279349A JP 2005279349 A JP2005279349 A JP 2005279349A JP 2004093990 A JP2004093990 A JP 2004093990A JP 2004093990 A JP2004093990 A JP 2004093990A JP 2005279349 A JP2005279349 A JP 2005279349A
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本発明は、消臭性吸水剤に関する。さらに詳しくは、吸収性物品に好適に使用しうる消臭性吸水剤に関する。 The present invention relates to a deodorant water-absorbing agent. More specifically, the present invention relates to a deodorant water-absorbing agent that can be suitably used for absorbent articles.
吸収性物品は、紙オムツ、生理用ナプキン、失禁パッド等の衛生材料、ペット用の尿吸収材料等をはじめ、パッキング材等の土木建築用資材、ドリップ吸収剤、保冷材等の食品鮮度保持用材料、土壌用保水材等の農園芸用物品等の種々の分野で使用されている。 Absorbent articles include sanitary materials such as paper diapers, sanitary napkins, incontinence pads, urine absorbing materials for pets, etc., civil engineering and building materials such as packing materials, drip absorbents, cold preservation materials, etc. It is used in various fields such as materials, agricultural and horticultural articles such as soil water retention materials.
中でも、衛生材料等において、体液、特に尿、血液、汗等を吸収した吸収性物品が、不快な臭いを発生することが問題となっている。これらの臭いは、皮膚および消化管に存在しているバクテリアが、尿素、タンパク質等の体液の成分を分解する酵素を生産し、体液の成分が分解されることによって発生する腐敗臭であると考えられる。特に尿の場合、これらの腐敗臭の主成分は、アンモニア、トリメチルアミン等の含窒素化合物、メタンチオール、硫化水素等の含硫黄化合物類等とされている。 Among these, in sanitary materials and the like, there is a problem that an absorbent article that absorbs bodily fluids, particularly urine, blood, sweat and the like, generates an unpleasant odor. These odors are considered to be rotting odors that are produced when bacteria present in the skin and digestive tract produce enzymes that break down body fluid components such as urea and protein, and the body fluid components are degraded. It is done. Particularly in the case of urine, the main components of these rotten odors are nitrogen-containing compounds such as ammonia and trimethylamine, and sulfur-containing compounds such as methanethiol and hydrogen sulfide.
これらの臭いを消臭するために、活性炭、ゼオライト等の臭気成分吸着剤と吸水性樹脂を混合した吸収体等が知られている（特許文献１および２）。 In order to deodorize these odors, an absorbent body in which an odor component adsorbent such as activated carbon or zeolite and a water absorbent resin are mixed is known (Patent Documents 1 and 2).
しかしながら、吸着剤と吸水性樹脂とは共に粉体であり、均一に混合することが難しい。一方、吸着剤の粒径を小さくすればするほど、その吸着効果が優れているが、粒径を小さくすると、混合する際に粉立ちが激しく工業的に生産することが困難である。 However, both the adsorbent and the water-absorbent resin are powders, and it is difficult to mix them uniformly. On the other hand, the smaller the particle size of the adsorbent, the better the adsorbing effect. However, when the particle size is reduced, powdering is severe when mixing and it is difficult to produce industrially.
本発明の目的は、消臭成分の粒径が小さい場合でも容易に吸水性樹脂と混合することができ、消臭能力に優れた消臭性吸水剤を提供することにある。 An object of the present invention is to provide a deodorant water-absorbing agent that can be easily mixed with a water-absorbent resin even when the particle size of the deodorant component is small and has an excellent deodorizing ability.
すなわち、本発明は、（Ａ）吸水性樹脂と、（Ｂ）無水マレイン酸含有共重合体と、（Ｃ）無機金属化合物と、を含むことを特徴とする消臭性吸水剤に関する。 That is, the present invention relates to a deodorant water absorbent comprising (A) a water absorbent resin, (B) a maleic anhydride-containing copolymer, and (C) an inorganic metal compound.
本発明の消臭性吸水剤は、無水マレイン酸含有共重合体と無機金属化合物を含んでいるため消臭能力に優れている。また、本発明の消臭性吸水剤の好適な例においては、無水マレイン酸含有共重合体および無機金属化合物が基材に担持されているため、消臭成分の粒径が小さい場合でも容易に吸水性樹脂と混合することができる。 The deodorant water-absorbing agent of the present invention is excellent in deodorizing ability because it contains a maleic anhydride-containing copolymer and an inorganic metal compound. In a preferred example of the deodorant water-absorbing agent of the present invention, since the maleic anhydride-containing copolymer and the inorganic metal compound are supported on the base material, it is easy even when the particle size of the deodorant component is small. Can be mixed with water-absorbing resin.
本発明に用いられる（Ａ）吸水性樹脂としては、例えば、アクリル酸塩重合体の架橋物、デンプン／アクリル酸塩グラフト共重合体の加水分解生成物の架橋物、ビニルアルコール／アクリル酸塩共重合体の架橋物、無水マレイン酸グラフトポリビニルアルコールの架橋物、架橋イソブチレン／無水マレイン酸共重合体、ポリアクリル酸部分中和物架橋体、酢酸ビニル／アクリル酸エステル共重合体のケン化物等が挙げられる。これらの中でも、大量の水を吸収することができ、多少の荷重をかけても吸収した水を分子内に保持することができる観点からアクリル酸塩重合体の架橋物が好適に用いられる。 Examples of the water-absorbing resin (A) used in the present invention include crosslinked products of acrylate polymers, crosslinked products of hydrolysis products of starch / acrylate graft copolymers, and vinyl alcohol / acrylate copolymers. Cross-linked polymer, cross-linked maleic anhydride grafted polyvinyl alcohol, cross-linked isobutylene / maleic anhydride copolymer, cross-linked polyacrylic acid partial neutralized product, saponified vinyl acetate / acrylic ester copolymer, etc. Can be mentioned. Among these, a crosslinked product of an acrylate polymer is preferably used from the viewpoint that a large amount of water can be absorbed and the absorbed water can be retained in the molecule even when a certain load is applied.
吸水性樹脂の製造方法としては、逆相懸濁重合法、水溶液重合法等の公知の方法が挙げられる。このような吸水性樹脂としては、アクリル酸塩重合体の架橋物として、住友精化株式会社の商品名；アクアキープ等の一般に市販されているものを用いることができる。 Examples of the method for producing the water-absorbent resin include known methods such as a reverse phase suspension polymerization method and an aqueous solution polymerization method. As such a water-absorbent resin, a commercially available product such as a trade name of Sumitomo Seika Co., Ltd .; Aquakeep can be used as a cross-linked product of an acrylate polymer.
本発明に用いられる（Ｂ）無水マレイン酸含有共重合体としては、メチルビニルエーテル／無水マレイン酸共重合体、スチレン／無水マレイン酸共重合体、イソブチレン／無水マレイン酸共重合体、メトキシエチレン／無水マレイン酸共重合体、エチレン／無水マレイン酸共重合体、酢酸ビニル／無水マレイン酸共重合体、エチレン／エチルアクリレート／無水マレイン酸共重合体、ジビニルエーテル／無水マレイン酸共重合体、スチレン／イソブチレン／無水マレイン酸共重合体、スルホン化スチレン／イソブチレン／無水マレイン酸共重合体等が挙げられる。中でも、アンモニア、トリメチルアミン等の含窒素化合物を消臭する効果が高い観点から、メチルビニルエーテル／無水マレイン酸共重合体、スチレン／無水マレイン酸共重合体またはイソブチレン／無水マレイン酸共重合体が好適に用いられる。 Examples of the (B) maleic anhydride-containing copolymer used in the present invention include methyl vinyl ether / maleic anhydride copolymer, styrene / maleic anhydride copolymer, isobutylene / maleic anhydride copolymer, methoxyethylene / anhydride Maleic acid copolymer, ethylene / maleic anhydride copolymer, vinyl acetate / maleic anhydride copolymer, ethylene / ethyl acrylate / maleic anhydride copolymer, divinyl ether / maleic anhydride copolymer, styrene / isobutylene / Maleic anhydride copolymer, sulfonated styrene / isobutylene / maleic anhydride copolymer, and the like. Of these, methyl vinyl ether / maleic anhydride copolymer, styrene / maleic anhydride copolymer or isobutylene / maleic anhydride copolymer is preferred from the viewpoint of high deodorizing effect on nitrogen-containing compounds such as ammonia and trimethylamine. Used.
無水マレイン酸含有共重合体の使用量は、吸水性樹脂１００重量部に対して、０．１〜６重量部、好ましくは０．３〜３重量部であることが望ましい。無水マレイン酸含有共重合体の使用量が０．１重量部未満の場合、アンモニア、トリメチルアミン等の含窒素化合物に対する消臭能力が低下するおそれがある。また、使用量が６重量部を超える場合、基材に担持させにくくなるおそれがある The amount of maleic anhydride-containing copolymer used is 0.1 to 6 parts by weight, preferably 0.3 to 3 parts by weight, based on 100 parts by weight of the water-absorbing resin. If the amount of maleic anhydride-containing copolymer used is less than 0.1 parts by weight, the deodorizing ability for nitrogen-containing compounds such as ammonia and trimethylamine may be reduced. Moreover, when the amount used exceeds 6 parts by weight, it may be difficult to support the substrate.
本発明に用いられる（Ｃ）無機金属化合物としては、例えば、酸化カルシウム、酸化マグネシウム、酸化アルミニウム、酸化亜鉛、酸化銅、酸化鉄、酸化チタン等の金属酸化物；水酸化亜鉛、水酸化チタン、水酸化カルシウム、水酸化マグネシウム、水酸化アルミニウム等の金属水酸化物；硫酸第一鉄、硫酸銅、硫酸亜鉛、硝酸銅、塩化カルシウム等の無機金属塩等が挙げられる。これらの中では、メタンチオール、硫化水素等の含硫黄化合物の消臭に優れている観点から酸化亜鉛が好適に用いられる。 Examples of the inorganic metal compound (C) used in the present invention include metal oxides such as calcium oxide, magnesium oxide, aluminum oxide, zinc oxide, copper oxide, iron oxide, and titanium oxide; zinc hydroxide, titanium hydroxide, Metal hydroxides such as calcium hydroxide, magnesium hydroxide, and aluminum hydroxide; inorganic metal salts such as ferrous sulfate, copper sulfate, zinc sulfate, copper nitrate, and calcium chloride. Among these, zinc oxide is preferably used from the viewpoint of excellent deodorization of sulfur-containing compounds such as methanethiol and hydrogen sulfide.
無機金属化合物の使用量は、吸水性樹脂１００重量部に対して、０．１〜４重量部、好ましくは０．２〜２重量部であることが望ましい。無機金属化合物の使用量が０．１重量部未満の場合、メタンチオール、硫化水素等の含硫黄化合物に対する消臭能力が低下するおそれがある。また、使用量が４重量部を超える場合、基材に担持させにくくなるおそれがある。 The amount of the inorganic metal compound used is 0.1 to 4 parts by weight, preferably 0.2 to 2 parts by weight, with respect to 100 parts by weight of the water absorbent resin. When the usage-amount of an inorganic metal compound is less than 0.1 weight part, there exists a possibility that the deodorizing capability with respect to sulfur containing compounds, such as methanethiol and hydrogen sulfide, may fall. Moreover, when the usage-amount exceeds 4 weight part, there exists a possibility that it may become difficult to carry | support on a base material.
本発明の消臭性吸水剤においては、消臭成分の粒径が小さい場合でも容易に吸水性樹脂と混合することができる観点から、無水マレイン酸含有共重合体および無機金属化合物が基材に担持されているのが好ましい。 In the deodorant water-absorbing agent of the present invention, the maleic anhydride-containing copolymer and the inorganic metal compound are used as the base material from the viewpoint that they can be easily mixed with the water-absorbent resin even when the particle size of the deodorant component is small. It is preferably supported.
基材としては、特に限定されないが、コットン、レーヨン、ポリプロピレン、ポリエチレン、ポリエステル、アクリル繊維等の不織布、織布、糸、モノフィラメント、紙等が挙げられる。中でも、紙が好適に用いられる。 Although it does not specifically limit as a base material, Nonwoven fabrics, such as cotton, rayon, a polypropylene, polyethylene, polyester, an acrylic fiber, a woven fabric, a thread | yarn, a monofilament, paper etc. are mentioned. Among these, paper is preferably used.
無水マレイン酸含有共重合体と無機金属化合物の基材に対する担持量は、基材１００重量部に対して合計で０．１〜５０重量部、好ましくは１〜３０重量部であることが望ましい。担持量が０．１重量部未満の場合、消臭効果が得られないおそれがある。また、担持量が５０重量部を超える場合、基材に担持させにくくなるおそれがある。 The amount of the maleic anhydride-containing copolymer and inorganic metal compound supported on the base material is 0.1 to 50 parts by weight, preferably 1 to 30 parts by weight, based on 100 parts by weight of the base material. If the loading amount is less than 0.1 parts by weight, the deodorizing effect may not be obtained. Moreover, when the carrying amount exceeds 50 parts by weight, it may be difficult to carry the material on the base material.
基材に担持させる方法としては、基材に塗布、含浸する方法、あるいは基材が紙の場合には、紙にすき込む方法等が挙げられる。中でも、紙にすき込む方法が好適に用いられる。 Examples of the method of supporting the substrate include a method of applying and impregnating the substrate, and a method of squeezing into the paper when the substrate is paper. Among these, a method of scribing into paper is preferably used.
無水マレイン酸含有共重合体および無機金属化合物を担持させた基材は、粉砕機、シュレッダー等を用いて、０．１〜１ｍｍ角に粉砕、裁断して用いることが好ましい。 The substrate on which the maleic anhydride-containing copolymer and the inorganic metal compound are supported is preferably used after being pulverized and cut into 0.1 to 1 mm square using a pulverizer, a shredder or the like.
本発明の消臭性吸水剤を製造する方法としては、特に限定されず、吸水性樹脂と、無水マレイン酸含有共重合体と、無機金属化合物とを単に混合してもよいが、予め無水マレイン酸含有共重合体および無機金属化合物を担持させた基材を粉砕、裁断したものと、吸水性樹脂を混合する方法が好ましい。 A method for producing the deodorant water-absorbing agent of the present invention is not particularly limited, and a water-absorbing resin, a maleic anhydride-containing copolymer, and an inorganic metal compound may be simply mixed. A method of mixing a water-absorbing resin with a pulverized and cut base material supporting an acid-containing copolymer and an inorganic metal compound is preferred.
無水マレイン酸含有共重合体および無機金属化合物を担持させた基材の使用量は、吸水性樹脂１００重量部に対して０．５〜４０重量部、好ましくは１〜２０重量部であることが望ましい。担持させた基材の使用量が０．５重量部未満の場合、消臭効果が得られないおそれがある。また、担持させた基材の使用量が４０重量部を超える場合、吸水速度、吸水量等の吸水性能が低下するおそれがある。 The amount of the base material on which the maleic anhydride-containing copolymer and the inorganic metal compound are supported is 0.5 to 40 parts by weight, preferably 1 to 20 parts by weight with respect to 100 parts by weight of the water absorbent resin. desirable. If the amount of the supported substrate is less than 0.5 parts by weight, the deodorizing effect may not be obtained. Moreover, when the usage-amount of the carry | supported base material exceeds 40 weight part, there exists a possibility that water absorption performance, such as a water absorption speed and a water absorption amount, may fall.
但し、担持された無水マレイン酸含有共重合体および無機金属化合物の量として、吸水性樹脂１００重量部に対して、無水マレイン酸含有共重合体は０．１〜６重量部、好ましくは０．３〜３重量部、無機金属化合物は０．１〜４重量部、好ましくは０．２〜２重量部の範囲とする。 However, the amount of the maleic anhydride-containing copolymer and the inorganic metal compound supported is 0.1 to 6 parts by weight, preferably 0. 3 to 3 parts by weight, the inorganic metal compound is 0.1 to 4 parts by weight, preferably 0.2 to 2 parts by weight.
本発明の消臭性吸水剤は、例えば、紙オムツ、生理用ナプキン、失禁パッド等の衛生材料等に好適に用いられる。 The deodorant water-absorbing agent of the present invention is suitably used for sanitary materials such as paper diapers, sanitary napkins, and incontinence pads.
以下、実施例および比較例により本発明をさらに詳しく説明するが、本発明はこれらの実施例により何ら限定されるものではない。 EXAMPLES Hereinafter, although an Example and a comparative example demonstrate this invention further in detail, this invention is not limited at all by these Examples.
実施例１
パルプ２．４ｇ、ポリアクリルアミド０．１ｇ、ポリビニルアルコール０．１ｇ、メチルビニルエーテル／無水マレイン酸共重合体（ＩＳＰジャパン株式会社の商品名；ガントレッツＡＮ１１９、平均粒径１０〜２０μｍ）０．４ｇ、酸化亜鉛（平均粒径３０μｍ）０．２５ｇを製紙試験機に投入し、目付け２４ｇ／ｍ２、厚み５０μｍの紙を得た。得られた紙を０．３〜０．５ｍｍ角に粉砕したもの１ｇと吸水性樹脂（住友精化株式会社の商品名；アクアキープＳＡ６０Ｓ）２０ｇとを混合して消臭性吸水剤を得た。
Example 1
2.4 g of pulp, 0.1 g of polyacrylamide, 0.1 g of polyvinyl alcohol, methyl vinyl ether / maleic anhydride copolymer (trade name of ISP Japan Co., Ltd .; GANTREZ AN119, average particle size 10-20 μm) 0.4 g, oxidation Zinc (average particle size 30 μm) 0.25 g was charged into a paper making tester to obtain a paper with a basis weight of 24 g / m 2 and a thickness of 50 μm. 1 g of the obtained paper ground to 0.3 to 0.5 mm square and 20 g of a water absorbent resin (trade name of Sumitomo Seika Co., Ltd .; Aquakeep SA60S) were mixed to obtain a deodorant water absorbent. .
実施例２
パルプ２．６ｇ、ポリアクリルアミド０．１ｇ、ポリビニルアルコール０．１ｇ、スチレン／無水マレイン酸共重合物（アトフィナジャパン株式会社の商品名；ＳＭＡ−１０００Ｐ、平均粒径６０μｍ）０．２ｇ、イソブチレン／無水マレイン酸共重合物（クラレ株式会社の商品名；イソバン０６、平均粒径３５０μｍ）０．２ｇ、酸化亜鉛（平均粒径３０μｍ）０．２５ｇを製紙試験機に投入し、目付け３０ｇ／ｍ２、厚み５５μｍの紙を得た。得られた紙を０．５〜０．８ｍｍ角に粉砕したもの１ｇと吸水性樹脂（住友精化株式会社の商品名；アクアキープＳＡ６０Ｓ）２０ｇとを混合して消臭性吸水剤を得た。
Example 2
Pulp 2.6 g, Polyacrylamide 0.1 g, Polyvinyl alcohol 0.1 g, Styrene / maleic anhydride copolymer (trade name of Atofina Japan Co., Ltd .; SMA-1000P, average particle size 60 μm) 0.2 g, isobutylene / A maleic anhydride copolymer (trade name of Kuraray Co., Ltd .; Isoban 06, average particle size 350 μm) 0.2 g and zinc oxide (average particle size 30 μm) 0.25 g were charged into a papermaking tester, with a basis weight of 30 g / m 2. A paper having a thickness of 55 μm was obtained. 1 g of the obtained paper ground to 0.5 to 0.8 mm square and 20 g of a water absorbent resin (trade name of Sumitomo Seika Co., Ltd .; Aquakeep SA60S) were mixed to obtain a deodorant water absorbent. .
比較例
吸水性樹脂（住友精化株式会社の商品名；アクアキープＳＡ６０Ｓ）２０ｇのみを用いた。
Comparative Example Only 20 g of a water absorbent resin (trade name of Sumitomo Seika Co., Ltd .; Aquakeep SA60S) was used.
評価
実施例で得られた消臭性吸水剤および比較例で用いた吸水性樹脂に１００ｇの水を加えて膨潤させた。５Ｌ容のテドラーバッグに得られた膨潤物を入れ、臭気成分としてアンモニア５００ｐｐｍ、硫化水素１００ｐｐｍをそれぞれ含有する窒素５Ｌを充填し、２５℃で放置した。０．２５時間後、０．５時間後、１時間後、２時間後、３時間後の各臭気成分の濃度を測定した。
Evaluation 100 g of water was added to the deodorant water-absorbing agent obtained in the examples and the water-absorbent resin used in the comparative examples to swell. The obtained swelling was put into a 5 L Tedlar bag, filled with 5 L of nitrogen containing 500 ppm of ammonia and 100 ppm of hydrogen sulfide as odor components, and left at 25 ° C. The concentration of each odor component after 0.25 hours, 0.5 hours, 1 hour, 2 hours, 3 hours was measured.
なお、アンモニアの濃度は、北川式検知管（ガステック社の商品名；Ｎｏ．３Ｍ、検出限界２ｐｐｍ）を用いて測定した。また、硫化水素の濃度は、ガスクロマトグラフィーで検出器ＦＰＤ、カラムＴＣＥＰを用いて測定した。結果を表１および表２に示す。 In addition, the density | concentration of ammonia was measured using the Kitagawa type | formula detection tube (Brand name of GASTEC; No.3M, detection limit 2ppm). The concentration of hydrogen sulfide was measured by gas chromatography using a detector FPD and a column TCEP. The results are shown in Tables 1 and 2.
表１および表２より、本発明の消臭性吸水剤は、消臭能力に優れていることがわかる。
From Table 1 and Table 2, it can be seen that the deodorant water-absorbing agent of the present invention is excellent in deodorizing ability.
Claims (7)
2. (A) 0.1 to 6 parts by weight of a maleic anhydride-containing copolymer and (C) 0.1 to 4 parts by weight of an inorganic metal compound with respect to 100 parts by weight of a water absorbent resin. Deodorant water absorbing agent of any one of -6.
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| JP (1) | JP2005279349A (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US11357880B2 (en) | 2018-08-06 | 2022-06-14 | Daiki Co., Ltd. | Water absorption treatment material and method for manufacturing the same |
Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH02307528A (en) * | 1989-05-19 | 1990-12-20 | Dainippon Printing Co Ltd | Composition for water absorbing sheet |
| JP2000079159A (en) * | 1998-07-03 | 2000-03-21 | Sanyo Chem Ind Ltd | Deodorant/antibacterial water absorbing agent and its production and absorbent article |
| JP2000225180A (en) * | 1998-11-30 | 2000-08-15 | Toru Okada | Deodorant |
-
2004
- 2004-03-29 JP JP2004093990A patent/JP2005279349A/en active Pending
Patent Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH02307528A (en) * | 1989-05-19 | 1990-12-20 | Dainippon Printing Co Ltd | Composition for water absorbing sheet |
| JP2000079159A (en) * | 1998-07-03 | 2000-03-21 | Sanyo Chem Ind Ltd | Deodorant/antibacterial water absorbing agent and its production and absorbent article |
| JP2000225180A (en) * | 1998-11-30 | 2000-08-15 | Toru Okada | Deodorant |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US11357880B2 (en) | 2018-08-06 | 2022-06-14 | Daiki Co., Ltd. | Water absorption treatment material and method for manufacturing the same |
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