JPH06199978A - Polyurethane composition, abrasion-resistant and low-hardness polyurethane foam and paper sheet conveying roll - Google Patents
Polyurethane composition, abrasion-resistant and low-hardness polyurethane foam and paper sheet conveying rollInfo
- Publication number
- JPH06199978A JPH06199978A JP4358980A JP35898092A JPH06199978A JP H06199978 A JPH06199978 A JP H06199978A JP 4358980 A JP4358980 A JP 4358980A JP 35898092 A JP35898092 A JP 35898092A JP H06199978 A JPH06199978 A JP H06199978A
- Authority
- JP
- Japan
- Prior art keywords
- polyurethane
- polyurethane foam
- composition
- hardness
- heat
- 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
Landscapes
- Delivering By Means Of Belts And Rollers (AREA)
- Manufacture Of Porous Articles, And Recovery And Treatment Of Waste Products (AREA)
- Compositions Of Macromolecular Compounds (AREA)
- Polyurethanes Or Polyureas (AREA)
Abstract
Description
【０００１】[0001]
【産業上の利用分野】本発明は、ポリウレタン組成物及
び耐摩耗性低硬質ポリウレタンフォーム並びに紙葉搬送
ロールに関するものである。BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a polyurethane composition, an abrasion-resistant and low-rigidity polyurethane foam, and a sheet-conveying roll.
【０００２】[0002]
【従来の技術】ポリウレタンフォームは配合により様々
の発泡度、硬度、耐摩耗性のものが得られることは良く
知られており、また、その実施も成されている。このよ
うにポリウレタンフォームにおいて、硬度が高いものは
耐摩耗性にも優れていることが通例である。2. Description of the Related Art It is well known that polyurethane foams having various degrees of foaming, hardness, and abrasion resistance can be obtained by blending, and the implementation thereof has been carried out. As described above, a polyurethane foam having a high hardness is usually excellent in abrasion resistance.
【０００３】一方、ポリウレタンフォームの使用者にお
いて、近来、低い硬度で優れた耐摩耗性を発揮するもの
が要求されるようになってきた。すなわち、例えば紙葉
搬送ロールに用いるポリウレタンフォームのように、低
い硬度で紙を確実に送ると同時に、優れた耐摩耗性も発
揮されるものが要求されている。On the other hand, users of polyurethane foam have recently been required to exhibit excellent abrasion resistance with low hardness. That is, for example, a polyurethane foam used for a paper transport roll is required to reliably feed paper with low hardness and at the same time exhibit excellent abrasion resistance.
【０００４】[0004]
【発明が解決しようとする課題】従来、ポリウレタンフ
ォームを得るための方法としては、フロンや塩化メチレ
ンの蒸発を利用する方法と、水とイソシアネートとの反
応による炭酸ガス発泡を利用する方法を主流とした。Conventionally, as a method for obtaining a polyurethane foam, a method utilizing evaporation of freon or methylene chloride and a method utilizing carbon dioxide gas foaming by a reaction between water and an isocyanate have been mainly used. did.
【０００５】しかし、前者の方法に依る発泡形成体は、
低硬度品が得られるも耐摩耗性が悪いと言う問題が生じ
た。そして、後者の方法に依る水発泡形成体は耐摩耗性
が優れているが、低硬度を得ることが不可能であった。However, the foam-forming material produced by the former method is
Although a low hardness product was obtained, there was a problem that the wear resistance was poor. The water foam-forming product obtained by the latter method has excellent wear resistance, but it was impossible to obtain low hardness.
【０００６】本発明の目的は、上記したような従来にお
ける問題点を解消し、低硬度にしてかつ耐摩耗性に優れ
た新規のポリウレタンフォームを提供することにある。An object of the present invention is to solve the above-mentioned conventional problems and to provide a novel polyurethane foam having low hardness and excellent abrasion resistance.
【課題を解決するための手段】本発明は、ポリウレタン
プレポリマーと水とを含んだポリウレタン組成物におい
て、熱膨張性マイクロカプセルを配合することに依っ
て、低硬度にしてかつ耐摩耗性に優れた新規なポリウレ
タンフォームを提供し、依って、前記した従来における
問題を解消したものである。The present invention provides a polyurethane composition containing a polyurethane prepolymer and water, which has a low hardness and is excellent in abrasion resistance by blending heat-expandable microcapsules. By providing a novel polyurethane foam, the conventional problems described above are solved.
【０００７】[0007]
【実施例】本発明は、液状ポリウレタンプレポリマーと
水とを含むポリウレタン組成物において、熱膨張性マイ
クロカプセルを配合したことを特徴とするものである。EXAMPLE The present invention is characterized in that a heat-expandable microcapsule is blended in a polyurethane composition containing a liquid polyurethane prepolymer and water.
【０００８】なお、上記した液状ポリウレタンプレポリ
マーと熱膨張性マイクロカプセルとの配合比率である
が、これは液状ポリウレタンプレポリマー１００重量部
に対して熱膨張性マイクロカプセルを０．２５乃至１．
０重量部を配合することが望ましい。すなわち、熱膨張
性マイクロカプセルを０．２５重量部以下とした場合、
低硬度品を得ることが出来ず、また、逆に１．０重量部
以上では、発泡が荒くなったり、フォームが出来なくな
るためである。The blending ratio of the liquid polyurethane prepolymer and the heat-expandable microcapsules is as follows. This is based on 100 parts by weight of the liquid polyurethane prepolymer.
It is desirable to add 0 part by weight. That is, when the amount of the heat-expandable microcapsules is 0.25 parts by weight or less,
This is because it is not possible to obtain a low-hardness product, and conversely, if it is 1.0 part by weight or more, foaming becomes rough or foam cannot be formed.
【０００９】また、上記した熱膨張性マイクロカプセル
であるが、これを熱可塑性樹脂と気体とから成るように
して実施することも可能である。また、当該熱膨張性マ
イクロカプセルの熱軟化点は６０℃以上であることが望
ましい。なぜならば、６０℃以下であると、混合撹拌中
にカプセルが熱膨張して成形不能と言うような事態を招
いてしまうからである。Although the above-mentioned heat-expandable microcapsules are used, it is also possible to implement them by using a thermoplastic resin and a gas. Further, the thermal softening point of the heat-expandable microcapsules is preferably 60 ° C. or higher. The reason is that if the temperature is 60 ° C. or lower, the capsules are thermally expanded during mixing and stirring, which causes a situation such that molding is impossible.
【００１０】また、本発明は、液状ポリウレタンプレポ
リマーと水とを含むポリウレタン組成物を、所定の形状
に成形して成るポリウレタンフォームにおいて、当該ポ
リウレタン組成物には熱膨張性マイクロカプセルを配合
して耐摩耗性低硬度ポリウレタンフォームを形成するよ
うにした実施例も技術内容に包含する。The present invention also provides a polyurethane foam formed by molding a polyurethane composition containing a liquid polyurethane prepolymer and water into a predetermined shape, wherein the polyurethane composition is blended with thermally expandable microcapsules. An embodiment adapted to form a wear resistant low hardness polyurethane foam is also included in the technical content.
【００１１】更に、上記したポリウレタンフォームにお
いて、当該ポリウレタン組成物が、液状ポリウレタンプ
レポリマー１００重量部に対して熱膨張性マイクロカプ
セルが０．２５乃至１．０重量部配合するように成すこ
とが望ましい。Further, in the above-mentioned polyurethane foam, it is desirable that the polyurethane composition is blended with 0.25 to 1.0 part by weight of the heat-expandable microcapsule with respect to 100 parts by weight of the liquid polyurethane prepolymer. .
【００１２】尚、前述した熱膨張マイクロカプセルであ
るが、これは、熱可塑性樹脂の殻の中に低沸点物を保持
させたものであり、その熱可塑性樹脂としては塩化ビニ
リデン、アクリロニトリル等の共重合物、低沸点物とし
てはイソブタン等の低沸点炭化水素が挙げられる。The above-mentioned thermally expanded microcapsules are those in which a low boiling point material is held in the shell of a thermoplastic resin, and the thermoplastic resin is vinylidene chloride, acrylonitrile, or the like. Examples of the polymer and the low-boiling substance include low-boiling hydrocarbons such as isobutane.
【００１３】図１は本発明に係る低硬度紙葉搬送ロール
を表したものであって、１は紙葉搬送ロール、２は軸芯
体、３はポリウレタンフォーム層を示す。すなわち本発
明は、軸芯上にゴムを被覆して成る紙葉搬送ロールにお
いて、当該ゴムとして、熱膨張性マイクロカプセルを配
合させて成る耐摩耗性低硬度ポリウレタンフォームを用
いた紙葉搬送ロールも技術範囲に包含するものである。FIG. 1 shows a low-hardness paper sheet conveying roll according to the present invention, wherein 1 is a paper sheet conveying roll, 2 is a mandrel, and 3 is a polyurethane foam layer. That is, the present invention also relates to a paper sheet conveyance roll having a shaft core coated with rubber, and also a paper sheet conveyance roll using a wear-resistant low-hardness polyurethane foam formed by blending thermally expandable microcapsules as the rubber. It is included in the technical scope.
【００１４】表１は従来の水発泡組成物の比較例１，
２、熱膨張性マイクロカプセルのみを配合した比較例
３、水を含むポリウレタンに熱膨張性マイクロカプセル
を配合した組成物の比較例４，５について、配合、発泡
性、フォームの硬さ、耐摩耗指数を比較した表である。Table 1 is a comparative example 1 of a conventional water-foaming composition.
2, Comparative Example 3 in which only the heat-expandable microcapsules were mixed, Comparative Examples 4 and 5 of the composition in which polyurethane containing water was mixed with the heat-expandable microcapsules It is the table which compared the index.
【００１５】表２は本発明に係るポリウレタンフォーム
組成物の実施例１乃至実施例７について、配合、発泡
性、フォームの硬さ、耐摩耗指数を比較した表である。Table 2 is a table comparing the composition, foamability, foam hardness, and abrasion resistance index of Examples 1 to 7 of the polyurethane foam composition according to the present invention.
【００１６】試験方法であるが、フォームの硬さについ
てはSRIS0101−1968に基づいて測定した。更に、耐摩耗
指数はBS−903 PartA−９法に基づいて、２０℃にてウ
イリアムス摩耗試験を行い、水発泡組成物の比較例１の
摩耗値を１００としたときの指数で示した。As for the test method, the hardness of the foam was measured according to SRIS0101-1968. Furthermore, the abrasion resistance index was shown as an index when the abrasion value of Comparative Example 1 of the water-foamed composition was set to 100 by carrying out a Williams abrasion test at 20 ° C. based on BS-903 Part A-9 method.
【００１７】[0017]
【表１】 [Table 1]
【００１８】[0018]
【表２】 [Table 2]
【００１９】表１から確認されるように、従来の水０．
６重量部配合の比較例１はフォームが硬く、水０．８重
量部配合の比較例２は発泡が荒く不均一で発泡性が悪
い。熱膨張性マイクロカプセルを２重量部配合の比較例
３は表面近傍と中心部の発泡が不均一で発泡性が悪い。
そして、水を含むポリウレタンに熱膨張性マイクロカプ
セルを０．１重量部配合の比較例４はフォームの硬さが
高く、また、１．２５重量部配合の比較例５は発泡が荒
くて発泡性が悪く、耐摩耗性の低下が大きい。As can be seen from Table 1, conventional water 0.
In Comparative Example 1 containing 6 parts by weight, the foam is hard, and in Comparative Example 2 containing 0.8 parts by weight of water, the foaming is rough and uneven, and the foamability is poor. In Comparative Example 3 containing 2 parts by weight of heat-expandable microcapsules, the foaming in the vicinity of the surface and in the center is not uniform and the foamability is poor.
Further, Comparative Example 4 in which 0.1 part by weight of the heat-expandable microcapsule is mixed with polyurethane containing water has a high foam hardness, and Comparative Example 5 in which 1.25 parts by weight is mixed has rough foaming and foaming property. Is poor and wear resistance is greatly reduced.
【００２０】一方、表２から確認されるように、上記表
１に表した各比較例に対し、水を含むポリウレタン組成
物に熱膨張性マイクロカプセル０．２５乃至１．０重量
部配合した実施例１乃至実施例７は、何れも発泡性に優
れ、フォームの硬さも４５度以下の低硬度を示し、耐摩
耗性も優れていることが判明した。On the other hand, as can be seen from Table 2, in each of the comparative examples shown in Table 1 above, 0.25 to 1.0 parts by weight of heat-expandable microcapsules was added to a polyurethane composition containing water. It was found that all of Examples 1 to 7 were excellent in foaming property, the foam had low hardness of 45 degrees or less, and the abrasion resistance was excellent.
【００２１】[0021]
【発明の効果】本発明は、ポリウレタンプレポリマーと
水とを含んだポリウレタン組成物において、熱膨張性マ
イクロカプセルを配合することに依って、良好なる成形
性を呈すると共に、低硬度にしてかつ耐摩耗性に優れた
新規なポリウレタンフォームの提供が可能化される。従
って、従来のように、低硬度品が得られるも耐摩耗性が
悪いと言う問題が生じたり、耐摩耗性には優れているが
低硬度品を得ることを不可能とすると言うような問題
は、本発明にあってはこれを一掃することと成る。INDUSTRIAL APPLICABILITY The present invention provides a polyurethane composition containing a polyurethane prepolymer and water, by blending heat-expandable microcapsules, exhibits good moldability, low hardness, and high resistance. It is possible to provide a novel polyurethane foam having excellent wear resistance. Therefore, as in the conventional case, there is a problem that a low hardness product is obtained but the wear resistance is poor, or a problem that it is impossible to obtain a low hardness product although it is excellent in wear resistance. In the present invention, this will be eliminated.
【図１】本発明に係る低硬度紙葉搬送ロールを表した横
断面図である。FIG. 1 is a cross-sectional view showing a low-hardness paper sheet transporting roll according to the present invention.
１ 紙葉搬送ロール ２ 軸芯体 ３ ポリウレタンフォーム層 1 Paper transport roll 2 Axial core 3 Polyurethane foam layer
Claims (7)
含むポリウレタン組成物において、熱膨張性マイクロカ
プセルを配合したことを特徴とするポリウレタンフォー
ム組成物。1. A polyurethane foam composition comprising a liquid polyurethane prepolymer and water, in which heat-expandable microcapsules are blended.
量部に対して熱膨張性マイクロカプセルを０．２５乃至
１．０重量部を配合したことを特徴とする請求項１に記
載のポリウレタンフォーム組成物。2. The polyurethane foam composition according to claim 1, wherein 0.25 to 1.0 part by weight of the heat-expandable microcapsule is mixed with 100 parts by weight of the liquid polyurethane prepolymer.
脂と気体とから成ることを特徴とする請求項１に記載の
ポリウレタンフォーム組成物。3. The polyurethane foam composition according to claim 1, wherein the heat-expandable microcapsules are composed of a thermoplastic resin and a gas.
６０℃以上であることを特徴とする請求項１に記載のポ
リウレタンフォーム組成物。4. The polyurethane foam composition according to claim 1, wherein the heat-expandable microcapsules have a heat softening point of 60 ° C. or higher.
含むポリウレタン組成物を、所定の形状に成形して成る
ポリウレタンフォームにおいて、当該ポリウレタン組成
物には熱膨張性マイクロカプセルを配合したことを特徴
とする耐摩耗性低硬度ポリウレタンフォーム。5. A polyurethane foam formed by molding a polyurethane composition containing a liquid polyurethane prepolymer and water into a predetermined shape, wherein the polyurethane composition is blended with thermally expandable microcapsules. Abrasion resistant low hardness polyurethane foam.
含むポリウレタン組成物を、所定の形状に成形して成る
ポリウレタンフォームにおいて、当該ポリウレタン組成
物が、液状ポリウレタンプレポリマー１００重量部に対
して熱膨張性マイクロカプセルが０．２５乃至１．０重
量部配合したことを特徴とする請求項５に記載の耐摩耗
性低硬度ポリウレタンフォーム。6. A polyurethane foam formed by molding a polyurethane composition containing a liquid polyurethane prepolymer and water into a predetermined shape, wherein the polyurethane composition has a thermal expansion coefficient relative to 100 parts by weight of the liquid polyurethane prepolymer. The abrasion-resistant low-hardness polyurethane foam according to claim 5, wherein 0.25 to 1.0 part by weight of the microcapsules is blended.
ールにおいて、当該ゴムとして、熱膨張性マイクロカプ
セルを配合させて成る耐摩耗性低硬度ポリウレタンフォ
ームを用いたことを特徴とする紙葉搬送ロール。7. A paper-sheet conveying roll having a shaft core covered with rubber, wherein abrasion-resistant low-hardness polyurethane foam prepared by blending thermally expandable microcapsules is used as the rubber. Paper transport roll.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP35898092A JP3166139B2 (en) | 1992-12-25 | 1992-12-25 | Paper transport roll |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP35898092A JP3166139B2 (en) | 1992-12-25 | 1992-12-25 | Paper transport roll |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPH06199978A true JPH06199978A (en) | 1994-07-19 |
| JP3166139B2 JP3166139B2 (en) | 2001-05-14 |
Family
ID=18462113
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP35898092A Expired - Fee Related JP3166139B2 (en) | 1992-12-25 | 1992-12-25 | Paper transport roll |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JP3166139B2 (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| KR100574828B1 (en) * | 1997-12-31 | 2006-12-22 | 주식회사 케이씨씨 | A composition of water paint having decorative proporty |
| JP2012240281A (en) * | 2011-05-18 | 2012-12-10 | Kyowa Leather Cloth Co Ltd | Method of manufacturing synthetic resin skin material and synthetic resin skin material |
-
1992
- 1992-12-25 JP JP35898092A patent/JP3166139B2/en not_active Expired - Fee Related
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| KR100574828B1 (en) * | 1997-12-31 | 2006-12-22 | 주식회사 케이씨씨 | A composition of water paint having decorative proporty |
| JP2012240281A (en) * | 2011-05-18 | 2012-12-10 | Kyowa Leather Cloth Co Ltd | Method of manufacturing synthetic resin skin material and synthetic resin skin material |
Also Published As
| Publication number | Publication date |
|---|---|
| JP3166139B2 (en) | 2001-05-14 |
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| Date | Code | Title | Description |
|---|---|---|---|
| LAPS | Cancellation because of no payment of annual fees |