JPH04119154A - Production of absorbing material - Google Patents
Production of absorbing materialInfo
- Publication number
- JPH04119154A JPH04119154A JP2226679A JP22667990A JPH04119154A JP H04119154 A JPH04119154 A JP H04119154A JP 2226679 A JP2226679 A JP 2226679A JP 22667990 A JP22667990 A JP 22667990A JP H04119154 A JPH04119154 A JP H04119154A
- Authority
- JP
- Japan
- Prior art keywords
- water
- absorbing
- weight
- absorbing polymer
- parts
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Granted
Links
- 238000004519 manufacturing process Methods 0.000 title claims description 12
- 239000011358 absorbing material Substances 0.000 title abstract description 6
- 229920000642 polymer Polymers 0.000 claims abstract description 44
- 239000000463 material Substances 0.000 claims abstract description 31
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims abstract description 27
- 239000002245 particle Substances 0.000 claims abstract description 23
- 238000002156 mixing Methods 0.000 claims abstract description 11
- 229920006037 cross link polymer Polymers 0.000 claims abstract description 5
- SMZOUWXMTYCWNB-UHFFFAOYSA-N 2-(2-methoxy-5-methylphenyl)ethanamine Chemical compound COC1=CC=C(C)C=C1CCN SMZOUWXMTYCWNB-UHFFFAOYSA-N 0.000 claims abstract description 4
- NIXOWILDQLNWCW-UHFFFAOYSA-N 2-Propenoic acid Natural products OC(=O)C=C NIXOWILDQLNWCW-UHFFFAOYSA-N 0.000 claims abstract description 4
- 239000000178 monomer Substances 0.000 claims abstract description 4
- 239000002250 absorbent Substances 0.000 claims description 37
- 230000002745 absorbent Effects 0.000 claims description 36
- NIXOWILDQLNWCW-UHFFFAOYSA-M Acrylate Chemical compound [O-]C(=O)C=C NIXOWILDQLNWCW-UHFFFAOYSA-M 0.000 claims description 2
- 239000008187 granular material Substances 0.000 claims description 2
- 150000003839 salts Chemical class 0.000 abstract description 5
- 229920000098 polyolefin Polymers 0.000 abstract description 3
- 206010021639 Incontinence Diseases 0.000 abstract description 2
- 210000004251 human milk Anatomy 0.000 abstract 1
- 235000020256 human milk Nutrition 0.000 abstract 1
- 238000010521 absorption reaction Methods 0.000 description 12
- 239000000835 fiber Substances 0.000 description 8
- 238000000034 method Methods 0.000 description 6
- 230000000694 effects Effects 0.000 description 5
- 239000007788 liquid Substances 0.000 description 5
- 239000011159 matrix material Substances 0.000 description 5
- -1 acrylic ester Chemical class 0.000 description 4
- 229920000578 graft copolymer Polymers 0.000 description 4
- 229920005992 thermoplastic resin Polymers 0.000 description 4
- 229920001577 copolymer Polymers 0.000 description 3
- PEDCQBHIVMGVHV-UHFFFAOYSA-N Glycerine Chemical compound OCC(O)CO PEDCQBHIVMGVHV-UHFFFAOYSA-N 0.000 description 2
- 239000001913 cellulose Substances 0.000 description 2
- 229920002678 cellulose Polymers 0.000 description 2
- 239000003431 cross linking reagent Substances 0.000 description 2
- 238000010438 heat treatment Methods 0.000 description 2
- 230000002209 hydrophobic effect Effects 0.000 description 2
- 238000000465 moulding Methods 0.000 description 2
- 239000002504 physiological saline solution Substances 0.000 description 2
- 239000000843 powder Substances 0.000 description 2
- UWFRVQVNYNPBEF-UHFFFAOYSA-N 1-(2,4-dimethylphenyl)propan-1-one Chemical compound CCC(=O)C1=CC=C(C)C=C1C UWFRVQVNYNPBEF-UHFFFAOYSA-N 0.000 description 1
- RYPKRALMXUUNKS-UHFFFAOYSA-N 2-Hexene Natural products CCCC=CC RYPKRALMXUUNKS-UHFFFAOYSA-N 0.000 description 1
- NLHHRLWOUZZQLW-UHFFFAOYSA-N Acrylonitrile Chemical compound C=CC#N NLHHRLWOUZZQLW-UHFFFAOYSA-N 0.000 description 1
- CERQOIWHTDAKMF-UHFFFAOYSA-N Methacrylic acid Chemical compound CC(=C)C(O)=O CERQOIWHTDAKMF-UHFFFAOYSA-N 0.000 description 1
- 229920003171 Poly (ethylene oxide) Polymers 0.000 description 1
- 229920002845 Poly(methacrylic acid) Polymers 0.000 description 1
- 239000004698 Polyethylene Substances 0.000 description 1
- 239000002202 Polyethylene glycol Substances 0.000 description 1
- FAPWRFPIFSIZLT-UHFFFAOYSA-M Sodium chloride Chemical compound [Na+].[Cl-] FAPWRFPIFSIZLT-UHFFFAOYSA-M 0.000 description 1
- 229920002472 Starch Polymers 0.000 description 1
- 239000007864 aqueous solution Substances 0.000 description 1
- 210000000481 breast Anatomy 0.000 description 1
- 125000003178 carboxy group Chemical group [H]OC(*)=O 0.000 description 1
- 238000004132 cross linking Methods 0.000 description 1
- 238000001035 drying Methods 0.000 description 1
- 230000004927 fusion Effects 0.000 description 1
- 235000011187 glycerol Nutrition 0.000 description 1
- 230000005484 gravity Effects 0.000 description 1
- 238000003898 horticulture Methods 0.000 description 1
- 239000008235 industrial water Substances 0.000 description 1
- 230000014759 maintenance of location Effects 0.000 description 1
- 239000002184 metal Substances 0.000 description 1
- 239000003595 mist Substances 0.000 description 1
- 239000003348 petrochemical agent Substances 0.000 description 1
- 239000004014 plasticizer Substances 0.000 description 1
- 229920001467 poly(styrenesulfonates) Polymers 0.000 description 1
- 229920002239 polyacrylonitrile Polymers 0.000 description 1
- 229920000728 polyester Polymers 0.000 description 1
- 229920000573 polyethylene Polymers 0.000 description 1
- 229920001223 polyethylene glycol Polymers 0.000 description 1
- 229920002717 polyvinylpyridine Polymers 0.000 description 1
- 229920000036 polyvinylpyrrolidone Polymers 0.000 description 1
- 239000001267 polyvinylpyrrolidone Substances 0.000 description 1
- 235000013855 polyvinylpyrrolidone Nutrition 0.000 description 1
- 238000004321 preservation Methods 0.000 description 1
- 239000011780 sodium chloride Substances 0.000 description 1
- 238000005507 spraying Methods 0.000 description 1
- 239000008107 starch Substances 0.000 description 1
- 235000019698 starch Nutrition 0.000 description 1
- 150000005846 sugar alcohols Polymers 0.000 description 1
- 239000004094 surface-active agent Substances 0.000 description 1
- 230000008961 swelling Effects 0.000 description 1
- 229920003169 water-soluble polymer Polymers 0.000 description 1
- 239000002023 wood Substances 0.000 description 1
- 239000004711 α-olefin Substances 0.000 description 1
Landscapes
- Materials For Medical Uses (AREA)
- Orthopedics, Nursing, And Contraception (AREA)
- Compositions Of Macromolecular Compounds (AREA)
- Nonwoven Fabrics (AREA)
- Absorbent Articles And Supports Therefor (AREA)
Abstract
Description
【発明の詳細な説明】
（産業上の利用分野）
本発明は、吸収材の製法に関する。詳しく述べると、そ
れ単独で優れた吸収特性および成形性を有し、しかも繊
維マトリックス中に配合した場合に極めて優れた効果を
発揮する吸収材の製法に関する。DETAILED DESCRIPTION OF THE INVENTION (Field of Industrial Application) The present invention relates to a method for producing an absorbent material. More specifically, the present invention relates to a method for producing an absorbent material that has excellent absorption properties and moldability on its own, and exhibits extremely excellent effects when blended into a fiber matrix.
（従来技術）
従来、親水性繊維素で被覆された吸水性重合体粒子およ
びそれらを含有する吸収体が開示されている（特開昭５
１−３５．６８５号および特開昭５８−１６３，４３８
号）。また、疎水性繊維ウェブの一部が吸水性重合体中
に埋め込まれてなる吸収材およびそれらを用いた吸収体
についても知られている（特開昭６１−６２，４６３号
および特開平１−１３５．３５０号）。(Prior Art) Water-absorbing polymer particles coated with hydrophilic cellulose and absorbent bodies containing them have been disclosed (Japanese Patent Application Laid-Open No. 5-11111).
No. 1-35.685 and JP-A-58-163,438
issue). In addition, absorbent materials in which a portion of a hydrophobic fiber web is embedded in a water-absorbing polymer and absorbent bodies using the same are also known (Japanese Patent Application Laid-open Nos. 61-62,463 and 1989- 135.350).
（発明が解決しようとする課題）
しかしながら、前者の場合、例えば親水性繊維素で被覆
された吸水性重合体を親水性繊維マトリックス中に分散
せしめた場合に得られた吸収体の液体吸収能は、吸水性
重合体単独の場合に比べて向上するものの、液吸収後の
湿潤強度は不十分で、特にその成形強度の点からマトリ
ックス中の吸水性重合体濃度には限界があった。(Problem to be Solved by the Invention) However, in the former case, for example, when a water-absorbing polymer coated with hydrophilic cellulose is dispersed in a hydrophilic fiber matrix, the liquid absorption capacity of the absorbent material obtained is However, the wet strength after liquid absorption is insufficient, and there is a limit to the concentration of the water-absorbing polymer in the matrix, especially from the viewpoint of molding strength.
一方、後者の場合、湿潤強度、成形強度は向上するもの
の、繊維ウェブが吸収性重合体内部に埋め込まれている
ために、繊維による膨潤規制が起こり、その吸収特性が
優れず、また製造に手間暇がかかる等といった問題点が
あった。On the other hand, in the latter case, although the wet strength and molding strength are improved, since the fiber web is embedded inside the absorbent polymer, swelling is restricted by the fibers, the absorption properties are not excellent, and the manufacturing process is laborious. There were problems such as time consuming.
したがって、本発明の目的は、吸収材の新規な製法を提
供することにある。本発明の他の目的は、それ単独で優
れた吸収特性および成形性を有し、しかも繊維マトリッ
クス中に配合した場合に極めて優れた効果（湿潤安定性
、保形性、分散性、吸収特性等を発揮する吸収材の製法
を提供することにある。Therefore, an object of the present invention is to provide a new method for producing absorbent materials. Another object of the present invention is to have excellent absorption properties and moldability by itself, and to have extremely excellent effects (wet stability, shape retention, dispersibility, absorption properties, etc.) when blended into a fiber matrix. The objective is to provide a manufacturing method for an absorbent material that exhibits the following properties.
（問題を解決するための手段）
これらの諸口的は、吸水性重合体１００重世部および合
成パルプ１〜８０重量部を１〜４０重量部の水存在下に
混合することを特徴とする吸収材の製法により達成され
る。(Means for Solving the Problem) These methods are characterized in that 100 parts by weight of a water-absorbing polymer and 1 to 80 parts by weight of synthetic pulp are mixed in the presence of 1 to 40 parts by weight of water. This is achieved through the manufacturing method of the wood.
（作用）
本発明における吸水性重合体としては、一般に吸水性を
有するものであれば何れでも良く、例えば（メタ）アク
リル酸またはその塩を主成分とし、場合により架橋剤を
添加してなる水溶性のエチレン性不飽和単量体の（架橋
）重合体の他、ポリエチレンオキシド、ポリビニルピロ
リドン、スルホン化ポリスチレンおよびポリビニルピリ
ジンの架橋体、デンプン−ポリ （メタ）アクリロニト
リルグラフト共重合体のケン化物、デンプン−ポリ（メ
タ）アクリル酸（およびその塩）グラフト共重合体（お
よびその架橋体）、デンプン−ポリ（メタ）アクリルエ
ステルグラフト共重合体（およびその架橋体）、デンプ
ン−ポリ（メタ）アクリルエステルグラフト共重合体の
加水分解物等を挙げることができる。好ましくは、アク
リル酸またはアクリル酸塩を主成分とする水溶性エチレ
ン性不飽和単量体の（架橋）重合体であり、より好まし
くはアクリル酸（塩）架橋重合体であり、その製造法は
いずれであっても良い。またこれらの吸水性重合体は２
種以上用いても良い。用いられる吸水性重合体は、５ｇ
／ｇ以上、好ましくは２０〜Ｂｏｇ／ｇ、最も好ましく
は３５〜６０ｇ／ｇの生理食塩水を吸収し得るものであ
り、実質的に乾燥した粒子である。吸水性重合体は、通
常その特性からある程度の水分を含有しているが、ここ
で言う実質的に乾燥したとは、通常の雰囲気下でそれぞ
れの粒子が互いに粘着し得ない状態を言う。粒子の形状
としは球状、顆粒状、不定形状、発泡体等の粉末状や繊
維状のものを用いることができ、それらは単粒子であっ
てもまた造粒物であっても良く、粒子表面近傍に架橋密
度勾配を持たせたものであってもよい。粉末の場合、そ
の粒子径は重量平均粒子径が１０〜１，０００ミクロン
のものが皐く、好ましくは１００〜７００ミクロンの範
囲のものである。(Function) The water-absorbing polymer used in the present invention may be any polymer that generally has water-absorbing properties, such as a water-soluble polymer containing (meth)acrylic acid or its salt as a main component and optionally containing a crosslinking agent. In addition to (crosslinked) polymers of ethylenically unsaturated monomers, crosslinked products of polyethylene oxide, polyvinylpyrrolidone, sulfonated polystyrene and polyvinylpyridine, saponified products of starch-poly(meth)acrylonitrile graft copolymers, starch - Poly(meth)acrylic acid (and its salt) graft copolymer (and its crosslinked product), starch-poly(meth)acrylic ester graft copolymer (and its crosslinked product), starch-poly(meth)acrylic ester Examples include hydrolysates of graft copolymers. Preferably, it is a (crosslinked) polymer of a water-soluble ethylenically unsaturated monomer containing acrylic acid or an acrylate as a main component, and more preferably an acrylic acid (salt) crosslinked polymer. Either one is fine. In addition, these water-absorbing polymers are
More than one species may be used. The water-absorbing polymer used is 5g
/g/g, preferably 20-Bog/g, most preferably 35-60 g/g, and are substantially dry particles. Water-absorbing polymers usually contain a certain amount of water due to their characteristics, but the term "substantially dry" as used herein refers to a state in which the individual particles cannot stick to each other under a normal atmosphere. The shape of the particles may be spherical, granular, irregularly shaped, foamed powder, etc., or fibrous. They may be single particles or granules, and the particle surface may be It may also have a crosslinking density gradient in the vicinity. In the case of powder, the weight average particle size is preferably in the range of 10 to 1,000 microns, preferably in the range of 100 to 700 microns.
本発明で使用される合成パルプは、熱可塑性樹脂をパル
プ状にしたものであって、それ自体公知である。熱可塑
性樹脂として、ポリオレフィン、ポリエステル、ポリア
クリロニトリル、その他の疎水性の熱可塑性樹脂を例示
できるが、特にポリエチレン、ポリプロピレン、エチレ
ン−プロピレン共重合体、エチレン−１−ブテン共重合
体、プロピレン−１−ブテン共重合体、エチレン−４−
メチル−１−ペンテン共重合体等のα−オレフィンの１
種または２種以上からなるポリオレフィンが、その親水
性を著しく改良できるので好ましい。The synthetic pulp used in the present invention is a pulp made from a thermoplastic resin, and is known per se. Examples of thermoplastic resins include polyolefin, polyester, polyacrylonitrile, and other hydrophobic thermoplastic resins, particularly polyethylene, polypropylene, ethylene-propylene copolymer, ethylene-1-butene copolymer, propylene-1- Butene copolymer, ethylene-4-
1 of α-olefins such as methyl-1-pentene copolymer
Polyolefins consisting of one species or two or more species are preferred because their hydrophilicity can be significantly improved.
熱可塑性樹脂から合成パルプを製造する方法は、例えば
特公昭４７−２１．８９８号、特公昭４７−３２，１３
３号および特公昭５２−４７．０４９号に開示されてい
る。このものは、例えば５ＷＰ（三井石油化学社製）
、ＰＵＬＰＥＸ （バーキュレス社製）といった商品名
で入手可能である。Methods for producing synthetic pulp from thermoplastic resins are described, for example, in Japanese Patent Publication No. 47-21.898 and Japanese Patent Publication No. 47-32.13.
No. 3 and Japanese Patent Publication No. 52-47.049. For example, 5WP (manufactured by Mitsui Petrochemicals)
and PULPEX (manufactured by Vercules).
本発明の吸収材の製法は、吸水性重合体１００重量部お
よび合成パルプ１〜８０重量部、好ましくは１〜３０重
位部を１〜４０重量部、好ましくは５〜３５重量部の水
存在下に混合することに特徴がある。混合時に、特定量
の水が存在することにより吸水性重合体粒子表面が軟化
され、多分岐状の合成パルプが、吸水性重合体を包み込
むように付着する。その結果、後述するように種々の効
果が発現する。吸水性重合体に対し新たに添加される水
の量は前記のとおりである。水の量が１重置部未満では
、合成パルプが吸水性重合体の表面を被覆できず、固定
化されないために、本発明の効果は得られない。逆に４
０重量部を越えると、繊維の一部が重合体内部に埋め込
まれるために吸水能力が低下し、また、余分な乾燥を必
要とするので好ましくない。必要により、水は吸収材の
吸収特性、柔軟性を向上させることを目的としてグリセ
リン、ポリエチレングリコール等の吸水性重合体の可塑
剤、多価金属塩、エチレングリコールジグリシジルエー
テル等のカルボキシル基含有吸水性重合体の架橋剤や界
面活性剤、多価アルコール等を含有していても良い。The method for producing the absorbent material of the present invention comprises adding 100 parts by weight of a water-absorbing polymer and 1 to 80 parts by weight, preferably 1 to 30 parts by weight, of a synthetic pulp in the presence of 1 to 40 parts by weight, preferably 5 to 35 parts by weight of water. It is characterized by being mixed at the bottom. During mixing, the presence of a specific amount of water softens the surface of the water-absorbing polymer particles, and the multi-branched synthetic pulp adheres to the water-absorbing polymer so as to envelop it. As a result, various effects are produced as described below. The amount of water newly added to the water-absorbing polymer is as described above. If the amount of water is less than 1 part, the synthetic pulp cannot cover the surface of the water-absorbing polymer and is not immobilized, so that the effects of the present invention cannot be obtained. On the contrary, 4
If the amount exceeds 0 parts by weight, part of the fibers will be embedded inside the polymer, resulting in a decrease in water absorbing ability, and additional drying will be required, which is not preferable. If necessary, water can be added to plasticizers of water-absorbing polymers such as glycerin and polyethylene glycol, polyvalent metal salts, and carboxyl group-containing water-absorbing materials such as ethylene glycol diglycidyl ether to improve the absorption characteristics and flexibility of the absorbent material. It may also contain a crosslinking agent for a polymer, a surfactant, a polyhydric alcohol, and the like.
本発明において吸水性重合体に対する、合成パルプおよ
び水の量は、目的や用途に応じて適宜上記範囲内におい
て任意に選択可能である。本発明の吸収材は、特定量の
水の存在下に吸水性重合体粒子を合成パルプと混合する
という簡便な方法により製造することができる。例えば
、（イ）水を吸収させた吸水性重合体粒子に合成パルプ
を添加混合する、（ロ）吸水性重合体粒子に水で湿潤さ
せた合成パルプを添加混合する、（ハ）吸水性重合体粒
子と合成パルプをトライブレンドしたのち、水を添加し
混合する等の方法を挙げることができる。添加される水
は水溶液状、液滴状、水蒸気、ミスト（微小？＆滴）等
種々の形態で添加可能である。上記混合には例えば、ニ
ーダ−ミキサー流動床混合機、スクリュー回転式混合機
等を用いることができるが特に限定されない。In the present invention, the amounts of synthetic pulp and water relative to the water-absorbing polymer can be arbitrarily selected within the above range depending on the purpose and use. The absorbent material of the present invention can be manufactured by a simple method of mixing water-absorbing polymer particles with synthetic pulp in the presence of a specific amount of water. For example, (a) adding and mixing synthetic pulp to water-absorbing polymer particles that have absorbed water, (b) adding and mixing synthetic pulp moistened with water to water-absorbing polymer particles, (c) adding and mixing water-absorbing polymer particles and Examples of methods include tri-blending the combined particles and synthetic pulp, and then adding and mixing water. The water to be added can be added in various forms such as an aqueous solution, droplets, water vapor, and mist (microscopic drops). For the above-mentioned mixing, for example, a kneader mixer, a fluidized bed mixer, a screw rotary mixer, etc. can be used, but there is no particular limitation.
得られた吸収材は、合成パルプにより吸水性重合体粒子
表面が被覆されておりその様子は電子顕微鏡で観察でき
る。吸収材の大きさについては特に限定されないが、０
．０５〜５＋ｎｍ、特に０．１〜３ｍｍの大きさが好ま
しい。In the obtained absorbent material, the surface of the water-absorbing polymer particles is coated with synthetic pulp, and the appearance can be observed using an electron microscope. The size of the absorbent material is not particularly limited, but
．． A size of 0.05 to 5+ nm, especially 0.1 to 3 mm is preferred.
（実施例） 以下、実施例を挙げて説明する。(Example) Examples will be described below.
実施例１
吸水性重合体（商品名： ［アクアリックＣＡＪ（重量
平均粒径４００ミクロン）二日本触媒化学工業（株）製
）１００重量部および合成パルプ（商品名：ＳＷＰ ｒ
ＵＬ−４１５Ｊ ：三井石油化学（株）製）７重量部を
２５重量部の水を噴霧しながら混合して本発明の吸収材
（１）を得た。Example 1 100 parts by weight of water-absorbing polymer (trade name: [Aqualic CAJ (weight average particle size 400 microns) manufactured by Nippon Shokubai Chemical Co., Ltd.) and synthetic pulp (trade name: SWP r)
Absorbent material (1) of the present invention was obtained by mixing 7 parts by weight of UL-415J (manufactured by Mitsui Petrochemicals Co., Ltd.) while spraying 25 parts by weight of water.
実施例２
合成パルプの量を２５重量部とした以外は実施例１と同
様にして本発明の吸収材（２）を得た。Example 2 An absorbent material (2) of the present invention was obtained in the same manner as in Example 1 except that the amount of synthetic pulp was 25 parts by weight.
実施例３
合成パルプの量を１７重世部とした以外は実施例１と同
様にして本発明の吸収材（３）を得た。Example 3 An absorbent material (3) of the present invention was obtained in the same manner as in Example 1 except that the amount of synthetic pulp was changed to 17 parts.
実施例４
水の皿を１０重歯部とした以外は実施例３と同様にして
本発明の吸収材（４）を得た。Example 4 An absorbent material (4) of the present invention was obtained in the same manner as in Example 3 except that the water dish was made into a 10-fold toothed portion.
実施例５
吸収材（１）〜（４）を、それぞれ坪量０．００１３
ｇ ／ ｃｌのティッシュペーパーで挟持した後、１５
０℃で５分間加熱処理して吸水性重合体がティッシュベ
ーパー間に固定された吸水性シートを得た。吸収材（２
）および（３）を用いた吸水性シートはそれぞれ０．
９％生理食塩水を１８ ｇ ／ ｇおよび２０ ｇ／ｇ
吸収し、しかも、吸水後の重合体の脱落は認められなか
った。Example 5 Absorbent materials (1) to (4) each have a basis weight of 0.0013
After clamping with g/cl tissue paper, 15
A water absorbent sheet in which the water absorbent polymer was fixed between tissue vapors was obtained by heat treatment at 0° C. for 5 minutes. Absorbent material (2
) and (3) respectively.
9% saline at 18 g/g and 20 g/g
The polymer was absorbed, and no shedding of the polymer after water absorption was observed.
実施例６
吸収材（１）を粉砕パルプ１４０重ｎ部と乾式混合し、
その後バッチ式空気抄造装置を用いてウェブに成形した
。得られたウェブを１５０℃で１０分間加熱処理して吸
水性重合体がつ５ニブ中に固定された吸水性ウェブを作
成した。得られた吸水性ウェブは、３０ｇ／ｃＪの荷重
下で１６ｇ／ｇの生理食塩水を吸収し、液吸収後も重合
体の脱落は認められなかった。Example 6 Absorbent (1) was dry mixed with 140 parts by weight of pulverized pulp,
Thereafter, it was formed into a web using a batch type air forming apparatus. The obtained web was heat-treated at 150° C. for 10 minutes to produce a water-absorbing web in which the water-absorbing polymer was fixed in five nibs. The obtained water-absorbent web absorbed 16 g/g of physiological saline under a load of 30 g/cJ, and no dropout of the polymer was observed even after absorbing the liquid.
実施例７
吸収材（４）を３０重量部の粉砕パルプからなる２枚の
ウェブ間に挟持し、その後１５０℃で加熱処理して吸水
性重合体が２層のパルプ間に固定されてなる吸水性ウェ
ブを得た。得られた吸水性ウェブは荷重下で１２ｇ／ｇ
の生理食塩水を吸収し、しかも液吸収後もポリマーの脱
落は認められなかった。Example 7 Absorbent material (4) was sandwiched between two webs made of 30 parts by weight of pulverized pulp, and then heated at 150°C to fix the water-absorbing polymer between the two layers of pulp. Got a sex web. The resulting absorbent web has a weight of 12 g/g under load.
of physiological saline, and no shedding of the polymer was observed even after absorbing the liquid.
（発明の効果）
本発明で得られた吸収材は以下の特徴を有するものであ
る。(Effects of the Invention) The absorbent material obtained by the present invention has the following characteristics.
単独で用いた場合には、
（１）表面が合成パルプで被覆されているためにママコ
が生じない。When used alone, (1) the surface is coated with synthetic pulp, so no lumps occur;
（２）加熱という単純な工程だけで吸水性重合体粒子が
結合した成形体を得ることができる。しかも、得られた
成形体は、粒子間に間隙を有したままで結合することが
可能で、得られた成形体はウィッキング特性に優れる。(2) A molded article in which water-absorbing polymer particles are bonded can be obtained by a simple process of heating. Furthermore, the obtained molded product can be bonded with gaps between the particles, and the obtained molded product has excellent wicking properties.
（３）粒子単独の場合よりもカサ比重が小さくそのため
他の基材（例えば粉砕パルプ）中への均一分散が容易と
いった特徴を有している。(3) Since the bulk specific gravity is smaller than that of particles alone, it has the characteristic that it is easy to uniformly disperse into other base materials (for example, pulverized pulp).
また、本発明の吸収材を繊維マトリックス中に配し、加
熱処理することにより、
（４）得られた吸収体の乾燥時・湿潤時の強度を向上す
ることができる。Furthermore, by placing the absorbent material of the present invention in a fiber matrix and heat-treating it, (4) the dry and wet strength of the resulting absorbent body can be improved.
（５）得られた吸収体中の吸水材濃度を、吸水性重合体
の吸収効率を低下させることなしに、従来では不可能で
あった範囲にまであげることができる。(5) The concentration of the water-absorbing material in the obtained absorbent body can be increased to a range that was previously impossible without reducing the absorption efficiency of the water-absorbing polymer.
（６）ばらばらに分散した吸水性重合体粒子表面部で合
成パルプによる融着が起こり、しかも包み込んだ形で融
着しているために、液吸収時に吸水性重合体同志のゲル
ブロックを防止でき、しかも膨潤した吸水性重合体粒子
のゲル強度をアップでき、脱落を防止できる。(6) Fusion by the synthetic pulp occurs on the surface of the dispersed water-absorbing polymer particles, and since they are fused in an encased manner, it is possible to prevent gel blocks between the water-absorbing polymer particles when absorbing liquid. Moreover, the gel strength of the swollen water-absorbing polymer particles can be increased and they can be prevented from falling off.
（７）得られた吸収体のウィッキング性能、吸収量およ
び弾性を飛輩的に向上できる。(7) The wicking performance, absorption capacity, and elasticity of the obtained absorbent body can be significantly improved.
本発明では上記の特性を有する吸収材を簡便かつ安価の
方法で製造することができる。したがって、本発明の吸
収材は、生理用ナプキン、紙おむつ、失禁パッド、母乳
パッド、医療用パッド等の医用ならびに衛材分野の吸水
材に最適である。また、鮮度保持材、農園芸用保水材、
工業用吸水材等保水ならびに吸水の必要な種々の用途に
使用できる。According to the present invention, an absorbent material having the above characteristics can be manufactured by a simple and inexpensive method. Therefore, the absorbent material of the present invention is most suitable for water-absorbing materials in the medical and hygiene fields, such as sanitary napkins, disposable diapers, incontinence pads, breast pads, and medical pads. In addition, freshness preservation materials, water retention materials for agriculture and horticulture,
It can be used in various applications that require water retention and water absorption, such as industrial water absorption materials.
Claims (4)
８０重量部を１〜４０重量部の水存在下に混合すること
を特徴とする吸収材の製法。(1) 100 parts by weight of water-absorbing polymer and 1 to 100 parts of synthetic pulp
A method for producing an absorbent material, which comprises mixing 80 parts by weight in the presence of 1 to 40 parts by weight of water.
主成分とする水溶性のエチレン性単量体の架橋重合体で
ある請求項１記載の吸収材の製法。(2) The method for producing an absorbent material according to claim 1, wherein the water-absorbing polymer is a crosslinked polymer of a water-soluble ethylenic monomer containing acrylic acid or an acrylate as a main component.
し１〜３０重量部の範囲である請求項１記載の吸収材の
製法。(3) The method for producing an absorbent material according to claim 1, wherein the amount of synthetic pulp is in the range of 1 to 30 parts by weight per 100 parts by weight of the water-absorbing polymer.
平均粒子径を有する粒状物である請求項１記載の吸収材
の製法。(4) The method for producing an absorbent material according to claim 1, wherein the water-absorbing polymer is a granular material having a weight average particle diameter of 10 to 1,000 microns.
Priority Applications (5)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP2226679A JPH0819609B2 (en) | 1990-08-30 | 1990-08-30 | Absorbent manufacturing method |
| US07/752,054 US5368918A (en) | 1990-08-30 | 1991-08-29 | Absorbent material comprising absorbent polymeric particulate material coated with synthetic pulp |
| DE1991630444 DE69130444T2 (en) | 1990-08-30 | 1991-08-30 | Absorbent material, absorbent body and process for its manufacture |
| EP19910307984 EP0478150B1 (en) | 1990-08-30 | 1991-08-30 | Absorbent material, absorbent body, and method for production thereof |
| US08/283,181 US5599763A (en) | 1990-08-30 | 1994-08-03 | Absorbent material, absorbent body, and method for production thereof |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP2226679A JPH0819609B2 (en) | 1990-08-30 | 1990-08-30 | Absorbent manufacturing method |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPH04119154A true JPH04119154A (en) | 1992-04-20 |
| JPH0819609B2 JPH0819609B2 (en) | 1996-02-28 |
Family
ID=16848956
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP2226679A Expired - Fee Related JPH0819609B2 (en) | 1990-08-30 | 1990-08-30 | Absorbent manufacturing method |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPH0819609B2 (en) |
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH06248187A (en) * | 1993-02-24 | 1994-09-06 | Sanyo Chem Ind Ltd | Water absorbent |
| JP2016073443A (en) * | 2014-10-06 | 2016-05-12 | 三井化学株式会社 | Absorber and sanitary article |
| KR20200071662A (en) * | 2018-12-11 | 2020-06-19 | 주식회사 엘지화학 | Method for Preparing Super Absorbent Polymer, and Super Absorbent Polymer |
| US11383221B2 (en) | 2018-12-12 | 2022-07-12 | Lg Chem, Ltd. | Preparation method of super absorbent polymer |
Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS63288258A (en) * | 1987-05-19 | 1988-11-25 | 株式会社 光洋 | Production of composite material of fibrous material and high-molecular absorbent |
| JPH0274254A (en) * | 1988-09-08 | 1990-03-14 | Uni Charm Corp | Absorbing body for absorbable article and preparation thereof |
-
1990
- 1990-08-30 JP JP2226679A patent/JPH0819609B2/en not_active Expired - Fee Related
Patent Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS63288258A (en) * | 1987-05-19 | 1988-11-25 | 株式会社 光洋 | Production of composite material of fibrous material and high-molecular absorbent |
| JPH0274254A (en) * | 1988-09-08 | 1990-03-14 | Uni Charm Corp | Absorbing body for absorbable article and preparation thereof |
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH06248187A (en) * | 1993-02-24 | 1994-09-06 | Sanyo Chem Ind Ltd | Water absorbent |
| JP2016073443A (en) * | 2014-10-06 | 2016-05-12 | 三井化学株式会社 | Absorber and sanitary article |
| KR20200071662A (en) * | 2018-12-11 | 2020-06-19 | 주식회사 엘지화학 | Method for Preparing Super Absorbent Polymer, and Super Absorbent Polymer |
| JP2021513589A (en) * | 2018-12-11 | 2021-05-27 | エルジー・ケム・リミテッド | High water absorption resin manufacturing method and high water absorption resin |
| US11383221B2 (en) | 2018-12-12 | 2022-07-12 | Lg Chem, Ltd. | Preparation method of super absorbent polymer |
Also Published As
| Publication number | Publication date |
|---|---|
| JPH0819609B2 (en) | 1996-02-28 |
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