JP2005154147A - Squeak preventive roller - Google Patents
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- JP2005154147A JP2005154147A JP2004292300A JP2004292300A JP2005154147A JP 2005154147 A JP2005154147 A JP 2005154147A JP 2004292300 A JP2004292300 A JP 2004292300A JP 2004292300 A JP2004292300 A JP 2004292300A JP 2005154147 A JP2005154147 A JP 2005154147A
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- 230000003449 preventive effect Effects 0.000 title abstract 3
- PAPBSGBWRJIAAV-UHFFFAOYSA-N ε-Caprolactone Chemical compound O=C1CCCCCO1 PAPBSGBWRJIAAV-UHFFFAOYSA-N 0.000 claims abstract description 31
- 239000003431 cross linking reagent Substances 0.000 claims abstract description 26
- 229920005862 polyol Polymers 0.000 claims abstract description 16
- 150000003077 polyols Chemical class 0.000 claims abstract description 14
- 150000002009 diols Chemical class 0.000 claims abstract description 11
- 229920005830 Polyurethane Foam Polymers 0.000 claims abstract description 6
- 239000011496 polyurethane foam Substances 0.000 claims abstract description 6
- 230000001588 bifunctional effect Effects 0.000 claims abstract description 4
- 239000004970 Chain extender Substances 0.000 claims description 11
- WERYXYBDKMZEQL-UHFFFAOYSA-N butane-1,4-diol Chemical compound OCCCCO WERYXYBDKMZEQL-UHFFFAOYSA-N 0.000 claims description 10
- 230000002265 prevention Effects 0.000 claims description 10
- UPMLOUAZCHDJJD-UHFFFAOYSA-N 4,4'-Diphenylmethane Diisocyanate Chemical compound C1=CC(N=C=O)=CC=C1CC1=CC=C(N=C=O)C=C1 UPMLOUAZCHDJJD-UHFFFAOYSA-N 0.000 claims description 7
- 241000628997 Flos Species 0.000 claims description 5
- DNIAPMSPPWPWGF-VKHMYHEASA-N (+)-propylene glycol Chemical compound C[C@H](O)CO DNIAPMSPPWPWGF-VKHMYHEASA-N 0.000 claims description 4
- YPFDHNVEDLHUCE-UHFFFAOYSA-N 1,3-propanediol Substances OCCCO YPFDHNVEDLHUCE-UHFFFAOYSA-N 0.000 claims description 4
- 229920000166 polytrimethylene carbonate Polymers 0.000 claims description 4
- 239000003795 chemical substances by application Substances 0.000 abstract description 4
- 238000005299 abrasion Methods 0.000 abstract description 2
- 239000006260 foam Substances 0.000 description 15
- XSTXAVWGXDQKEL-UHFFFAOYSA-N Trichloroethylene Chemical compound ClC=C(Cl)Cl XSTXAVWGXDQKEL-UHFFFAOYSA-N 0.000 description 14
- 230000000052 comparative effect Effects 0.000 description 10
- 229920001730 Moisture cure polyurethane Polymers 0.000 description 6
- 238000005266 casting Methods 0.000 description 6
- 229920002635 polyurethane Polymers 0.000 description 6
- 239000004814 polyurethane Substances 0.000 description 6
- 238000000926 separation method Methods 0.000 description 6
- WNLRTRBMVRJNCN-UHFFFAOYSA-L adipate(2-) Chemical compound [O-]C(=O)CCCCC([O-])=O WNLRTRBMVRJNCN-UHFFFAOYSA-L 0.000 description 5
- ZJCCRDAZUWHFQH-UHFFFAOYSA-N Trimethylolpropane Chemical compound CCC(CO)(CO)CO ZJCCRDAZUWHFQH-UHFFFAOYSA-N 0.000 description 4
- 239000005056 polyisocyanate Substances 0.000 description 4
- 229920001228 polyisocyanate Polymers 0.000 description 4
- 230000002159 abnormal effect Effects 0.000 description 3
- -1 and in particular Substances 0.000 description 3
- CDQSJQSWAWPGKG-UHFFFAOYSA-N butane-1,1-diol Chemical compound CCCC(O)O CDQSJQSWAWPGKG-UHFFFAOYSA-N 0.000 description 3
- 150000001875 compounds Chemical class 0.000 description 3
- 229920001971 elastomer Polymers 0.000 description 3
- 238000005187 foaming Methods 0.000 description 3
- 238000004519 manufacturing process Methods 0.000 description 3
- 229920001610 polycaprolactone Polymers 0.000 description 3
- ULWHHBHJGPPBCO-UHFFFAOYSA-N propane-1,1-diol Chemical compound CCC(O)O ULWHHBHJGPPBCO-UHFFFAOYSA-N 0.000 description 3
- 239000003381 stabilizer Substances 0.000 description 3
- 239000000126 substance Substances 0.000 description 3
- ALQLPWJFHRMHIU-UHFFFAOYSA-N 1,4-diisocyanatobenzene Chemical compound O=C=NC1=CC=C(N=C=O)C=C1 ALQLPWJFHRMHIU-UHFFFAOYSA-N 0.000 description 2
- 230000003712 anti-aging effect Effects 0.000 description 2
- 238000009826 distribution Methods 0.000 description 2
- 239000004088 foaming agent Substances 0.000 description 2
- IQPQWNKOIGAROB-UHFFFAOYSA-N isocyanate group Chemical group [N-]=C=O IQPQWNKOIGAROB-UHFFFAOYSA-N 0.000 description 2
- 239000000463 material Substances 0.000 description 2
- 239000000203 mixture Substances 0.000 description 2
- QXJQHYBHAIHNGG-UHFFFAOYSA-N trimethylolethane Chemical compound OCC(C)(CO)CO QXJQHYBHAIHNGG-UHFFFAOYSA-N 0.000 description 2
- 150000004072 triols Chemical group 0.000 description 2
- SBJCUZQNHOLYMD-UHFFFAOYSA-N 1,5-Naphthalene diisocyanate Chemical compound C1=CC=C2C(N=C=O)=CC=CC2=C1N=C=O SBJCUZQNHOLYMD-UHFFFAOYSA-N 0.000 description 1
- VDHWOHDSOHPGPC-UHFFFAOYSA-N 3,3-dihydroxyoxepan-2-one Chemical compound OC1(O)CCCCOC1=O VDHWOHDSOHPGPC-UHFFFAOYSA-N 0.000 description 1
- 239000000654 additive Substances 0.000 description 1
- 230000000996 additive effect Effects 0.000 description 1
- 125000000217 alkyl group Chemical group 0.000 description 1
- 239000003963 antioxidant agent Substances 0.000 description 1
- 230000003078 antioxidant effect Effects 0.000 description 1
- 230000005587 bubbling Effects 0.000 description 1
- 238000011109 contamination Methods 0.000 description 1
- 238000004132 cross linking Methods 0.000 description 1
- 239000000428 dust Substances 0.000 description 1
- 125000000524 functional group Chemical group 0.000 description 1
- 238000000034 method Methods 0.000 description 1
- 238000002156 mixing Methods 0.000 description 1
- 239000002994 raw material Substances 0.000 description 1
- 230000001953 sensory effect Effects 0.000 description 1
- RUELTTOHQODFPA-UHFFFAOYSA-N toluene 2,6-diisocyanate Chemical compound CC1=C(N=C=O)C=CC=C1N=C=O RUELTTOHQODFPA-UHFFFAOYSA-N 0.000 description 1
- 238000011144 upstream manufacturing Methods 0.000 description 1
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 1
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- Polyurethanes Or Polyureas (AREA)
- Sheets, Magazines, And Separation Thereof (AREA)
Abstract
Description
本発明は、発泡ポリウレタンからなる鳴き防止ロールに関し、特に、複写機、ファクシミリ、各種プリンター等の各種ＯＡ機器等の各種給紙、搬送を行う給紙搬送用ロール、及びリバースロールなどの紙葉類分離ロールに用いて好適な鳴き防止ロールに関する。 The present invention relates to an anti-squealing roll made of foamed polyurethane, and in particular, paper sheets such as various paper feeding / conveying rolls for various OA devices such as copying machines, facsimile machines, and various printers, and reverse rolls. The present invention relates to a squeal prevention roll suitable for use in a separation roll.
従来、各種ＯＡ機器の給紙・搬送用のロールは、搬送力が大きく、耐摩耗性に優れることが求められていたが、近年、給紙時の紙等との摩擦による振動により、いわゆる鳴き現象が生じるという点が問題視されている。 Conventionally, rolls for paper feed / conveyance of various OA devices have been required to have a large carrying force and excellent wear resistance. However, in recent years, the so-called squeal has been caused by vibration caused by friction with paper or the like during paper feeding. The point that the phenomenon occurs is regarded as a problem.
例えば、給紙部の重送防止に用いられる分離ロールには、その耐摩耗性、原稿非汚染性の点から、一般的には発泡ポリウレタンが用いられるが、紙さばき後、例えば、給紙ベルトと分離ロールとがつれまわりする際にブブブ、キューという鳴きが発生する。 For example, for the separation roll used for preventing double feeding of the paper feeding unit, polyurethane foam is generally used from the viewpoint of abrasion resistance and document non-contamination, but after paper separation, for example, a paper feeding belt When the roll and the separation roll are swung around, a squeak is heard.
そのため、従来鳴き対策として、種々の検討がなされている。例えば、本出願人は、低硬度化を図りつつ耐久性に優れ、紙粉の影響を受けず安定した摩擦係数を維持することができ、且つ鳴きが発生しない給紙搬送用ロール（特許文献１参照）や、基材のプレポリマーを規定することにより摩擦係数安定性を向上させ鳴きが発生しないようにした部材を提案している（特許文献２参照）。しかしながら、未だ十分な対策品は出現していない。 For this reason, various studies have been made as countermeasures against noise. For example, the present applicant has excellent durability while reducing hardness, can maintain a stable coefficient of friction without being affected by paper dust, and does not generate noise (Patent Document 1). And a member that improves the coefficient of friction stability and prevents squealing by defining a prepolymer of the base material (see Patent Document 2). However, sufficient countermeasure products have not yet appeared.
本発明はこのような事情に鑑み、給紙搬送用ロール及び紙葉類分離ロールに用いて、耐摩耗性に優れ、且つ鳴きを防止することができる鳴き防止ロールを提供することを課題とする。 In view of such circumstances, it is an object of the present invention to provide a squeal prevention roll that is excellent in wear resistance and that can prevent squealing, by being used for a paper feed and roll and a paper sheet separation roll. .
本発明者は、上記課題を解決するために鋭意研究を重ねた結果、カプロラクトン系ポリウレタンプレポリマーを基材とし架橋剤に３官能以上のカプロラクトン系ポリオールを使用することが、鳴きに対してきわめて有効であるという新たな知見を得て、本発明を完成させた。 As a result of intensive studies to solve the above problems, the present inventor is extremely effective against squeaking by using a caprolactone-based polyurethane prepolymer as a base material and using a tri- or higher functional caprolactone-based polyol as a crosslinking agent. The present invention was completed by obtaining new knowledge that
かかる本発明の第１の態様は、カプロラクトン系ジオールを用いたプレポリマーに、２官能短鎖ジオールからなる鎖延長剤と３官能以上のポリオールからなる架橋剤とを用いて得た発泡ポリウレタンからなる鳴き防止ロールであって、前記架橋剤が数平均分子量２００以上３０００以下のカプロラクトン系ポリオールであることを特徴とする鳴き防止ロールにある。 The first aspect of the present invention comprises a polyurethane foam obtained by using a prepolymer using a caprolactone-based diol and a chain extender comprising a bifunctional short-chain diol and a crosslinking agent comprising a trifunctional or higher polyol. The anti-squealing roll, wherein the cross-linking agent is a caprolactone-based polyol having a number average molecular weight of 200 or more and 3000 or less.
本発明の第２の態様は、第１の態様において、前記カプロラクトン系ポリオールの数平均分子量が５００以上２０００以下であることを特徴とする鳴き防止ロールにある。 According to a second aspect of the present invention, in the first aspect, the caprolactone-based polyol has a number average molecular weight of 500 or more and 2,000 or less.
本発明の第３の態様は、第１または２の態様において、前記鎖延長剤が、１，４−ブタンジオール及び１，３−プロパンジオールの少なくとも一方であることを特徴とする鳴き防止ロールにある。 A third aspect of the present invention provides the anti-squealing roll according to the first or second aspect, wherein the chain extender is at least one of 1,4-butanediol and 1,3-propanediol. is there.
本発明の第４の態様は、第１〜３の何れかの態様において、前記プレポリマーが４，４’−ジフェニルメタンジイソシアネート（ＭＤＩ）を用いて製造されたものであることを特徴とする鳴き防止ロールにある。 According to a fourth aspect of the present invention, in any one of the first to third aspects, the prepolymer is produced using 4,4′-diphenylmethane diisocyanate (MDI). In the roll.
本発明の第５の態様は、第１〜４の何れかの態様において、前記発泡ポリウレタンが、メカニカルフロスで発泡されていることを特徴とする鳴き防止ロールにある。 According to a fifth aspect of the present invention, in any one of the first to fourth aspects, the polyurethane foam is foamed with mechanical floss.
本発明では、カプロラクトン系ジオールとポリイソシアネートとを用いたカプロラクトン系ポリウレタンプレポリマーから製造される発泡ポリウレタンに、架橋剤として３官能以上のカプロラクトン系ポリオールを用いることにより、異音発生（鳴き）が防止されるとともに、耐摩耗性が向上するという効果を奏する。 In the present invention, generation of abnormal noise (squeal) is prevented by using a tri- or higher functional caprolactone polyol as a cross-linking agent in a foamed polyurethane produced from a caprolactone polyurethane prepolymer using a caprolactone diol and a polyisocyanate. In addition, the wear resistance is improved.
本発明の鳴き防止ロールは、従来から知られている発泡ポリウレタンのうち、ポリε−カプロラクトン系ジオールと、ポリイソシアネートと、鎖延長剤および架橋剤とを用いてプレポリマー法により製造されるものである。 The squeal prevention roll of the present invention is produced by a prepolymer method using a polyε-caprolactone-based diol, a polyisocyanate, a chain extender and a crosslinking agent among conventionally known foamed polyurethanes. is there.
さらに詳述すると、カプロラクトン系プレポリマーは、ポリε−カプロラクトン系ジオールと過剰のポリイソシアネート化合物とを反応させたもので、イソシアネート基が残存したものである。このカプロラクトン系プレポリマーの残存したイソシアネート基が、鎖延長剤及び架橋剤と反応することにより、ポリウレタンを製造することができる。 More specifically, the caprolactone-based prepolymer is obtained by reacting a polyε-caprolactone-based diol with an excess of a polyisocyanate compound, and has an isocyanate group remaining. A polyurethane can be produced by reacting the remaining isocyanate group of the caprolactone-based prepolymer with a chain extender and a crosslinking agent.
カプロラクトン系プレポリマーを製造するためのポリε−カプロラクトン系ジオールとしては、数平均分子量が１０００〜４０００のものを用いることができる。また、ポリイソシアネート化合物としては、２，６−トルエンジイソシアネート（ＴＤＩ）、４，４’−ジフェニルメタンジイソシアネート（ＭＤＩ）、パラフェニレンジイソシアネート（ＰＰＤＩ）、１，５−ナフタレンジイソシアネート（ＮＤＩ）、３，３−ジメチルジフェニル−４，４’−ジイソシアネート（ＴＯＤＩ）などを挙げることができる。特に、性能およびコスト面で好適なものはＭＤＩである。 As a poly (epsilon) -caprolactone type | system | group diol for manufacturing a caprolactone type | system | group prepolymer, a thing with a number average molecular weight of 1000-4000 can be used. Examples of the polyisocyanate compound include 2,6-toluene diisocyanate (TDI), 4,4′-diphenylmethane diisocyanate (MDI), paraphenylene diisocyanate (PPDI), 1,5-naphthalene diisocyanate (NDI), 3,3- Examples thereof include dimethyldiphenyl-4,4′-diisocyanate (TODI). In particular, MDI is preferable in terms of performance and cost.
本発明において、架橋剤として用いる３官能以上のカプロラクトン系ポリオールは、数平均分子量が２００以上３０００以下、さらに好ましくは数平均分子量５００以上２０００以下のものであり、一般的にポリウレタンの製造時に用いられる架橋剤よりも分子量の大きい長鎖ポリオールである。ここで、３官能以上のカプロラクトン系ポリオールとは、εカプロラクトンから合成されるポリオールであり、トリオールであれば例えば下記式（１）で表すことができる。３官能以上のカプロラクトン系ポリオールは、アジペート系など他の３官能以上のポリオールと比較すると、分子量分布が狭くなるといった特性を持つ。このような構造を有する化合物を架橋剤とすると、長鎖によるゆとりのある架橋が均一になされ製造されるポリウレタンは振動を吸収しやすくなり、また、カプロラクトン系ポリウレタンプレポリマーと架橋剤との相溶性がよいため、鳴きを防止することができると推測される。また、分子量分布が狭いため、良好な耐摩耗性を示す。 In the present invention, the trifunctional or higher functional caprolactone polyol used as a crosslinking agent has a number average molecular weight of 200 or more and 3000 or less, more preferably a number average molecular weight of 500 or more and 2000 or less, and is generally used in the production of polyurethane. It is a long-chain polyol having a molecular weight larger than that of the crosslinking agent. Here, the tri- or higher functional caprolactone-based polyol is a polyol synthesized from ε-caprolactone, and can be represented by, for example, the following formula (1) as long as it is a triol. The trifunctional or higher functional caprolactone-based polyol has a characteristic that the molecular weight distribution is narrower than other trifunctional or higher functional polyols such as adipate. When a compound having such a structure is used as a cross-linking agent, the polyurethane produced by uniform cross-linking with a long chain is likely to absorb vibration, and the compatibility between the caprolactone-based polyurethane prepolymer and the cross-linking agent is increased. Therefore, it is estimated that squealing can be prevented. Moreover, since the molecular weight distribution is narrow, good wear resistance is exhibited.
また、鎖延長剤は、２官能短鎖ジオールであり、例えば、数平均分子量が８０〜１６０の短鎖ジオールであり、例えば、プロパンジオール（ＰＤ）及びブタンジオール（ＢＤ）の少なくとも一方を用いるが、勿論、二種以上混合して用いてもよい。ここで、プロパンジオールとしては１，３−プロパンジオールが、ブタンジオールとしては１，４−ブタンジオールが代表的なものであり、１，３−プロパンジオール及び１，４−ブタンジオールは性能およびコスト面で好適であるが、これに限定されるものではない。 The chain extender is a bifunctional short chain diol, for example, a short chain diol having a number average molecular weight of 80 to 160. For example, at least one of propanediol (PD) and butanediol (BD) is used. Of course, two or more kinds may be mixed and used. Here, 1,3-propanediol is representative as propanediol, and 1,4-butanediol is representative as butanediol, and 1,3-propanediol and 1,4-butanediol are performance and cost. However, the present invention is not limited to this.
ここで、鎖延長剤と架橋剤との総量に対して架橋剤を１５重量％以上用いるのが好ましく、好ましくは鎖延長剤：架橋剤＝８５：１５〜５０：５０、さらに好ましくは鎖延長剤：架橋剤＝８０：２０〜６０：４０である。架橋剤が１５重量％より少ないと、硬度が高くなり鳴きが発生する。また、５０重量％より多いと、耐久性が低下し、ロールとしての機能を果たさなくなる。 Here, the crosslinking agent is preferably used in an amount of 15% by weight or more based on the total amount of the chain extender and the crosslinking agent, preferably the chain extender: crosslinking agent = 85: 15-50: 50, more preferably the chain extender. : Crosslinking agent = 80: 20 to 60:40. If the cross-linking agent is less than 15% by weight, the hardness increases and squeal occurs. On the other hand, when the amount is more than 50% by weight, the durability is lowered and the roll function is not achieved.
本発明の鳴き防止ロールは、上述した原料を配合後、発泡成形すればよいが、所定の添加剤を添加してもよい。例えば、発泡剤、整泡剤、老化防止剤、酸化防止剤などを添加してもよい。また、発泡は発泡剤による発泡でもよいが、整泡剤を添加して機械的に発泡させるメカニカルフロスでの発泡でもよい。 The squeal prevention roll of the present invention may be foam-molded after blending the above-mentioned raw materials, but a predetermined additive may be added. For example, you may add a foaming agent, a foam stabilizer, anti-aging agent, antioxidant, etc. The foaming may be foaming with a foaming agent, but may be foaming with a mechanical floss that is foamed mechanically by adding a foam stabilizer.
本発明の鳴き防止ロールのゴム硬度（Ａｓｋｅｒ Ｃ）は、用途や製造条件に応じて適宜決定すればよいが、給紙搬送用ロール、特に、リバースロールとして用いる場合には、ゴム硬度３５〜７５°（Ａｓｋｅｒ Ｃ）とするのが好ましい。 The rubber hardness (Asker C) of the squeal prevention roll of the present invention may be appropriately determined according to the use and production conditions, but when used as a paper feed / conveying roll, particularly a reverse roll, the rubber hardness is 35 to 75. It is preferable to set it as (Asker C).
図１は、本発明の鳴き防止ロールをリバースロールとして用いた様子を示す説明図である。図１に示すように、リバースロール１０は、給紙駆動ベルト２１に対向して設けられ、この上流側には、紙葉類３０をピックアップするピックアップロール２２が設けられている。
FIG. 1 is an explanatory view showing a state where the squeal prevention roll of the present invention is used as a reverse roll. As shown in FIG. 1, the
このようなリバースロール１０では、紙さばき後、リバースロール１０が給紙駆動ベルト２１と連れ回りする際に、ブブブ、キューというスティックスリップ音が発生する場合があるが、本発明の鳴き防止ロールを用いると、このような鳴きが著しく低減される。
In such a
以下、実施例により本発明をさらに詳細に説明するが、これらの実施例は本発明の範囲を何ら限定するものではない。 EXAMPLES Hereinafter, although an Example demonstrates this invention further in detail, these Examples do not limit the scope of the present invention at all.
（実施例１）
カプロラクトン系ポリウレタンプレポリマー（ＲＶ２６００：大日本インキ化学工業株式会社製）１００重量部に、整泡剤、老化防止剤を添加し、メカニカルフロスで５分間攪拌した。その後、硬化剤として、鎖延長剤１，４−ブタンジオール／架橋剤εカプロラクトントリオール（プラクセル３０８：分子量８５０）＝７０／３０の混合物を１４重量部、水０．０５重量部とを混合し、メカニカルフロスで１分間攪拌したものを、１２０℃に加熱した金型に注型密度０．４ｇ／ｃｍ３（注型量／注型金型）となるように注型し、４０分後に取り出した。得られたロールを研磨し、突っ切りし、外径φ２７ｍｍ×内径φ１７ｍｍ×幅２６ｍｍのロール発泡体を得た。
(Example 1)
A foam stabilizer and an anti-aging agent were added to 100 parts by weight of a caprolactone-based polyurethane prepolymer (RV2600: manufactured by Dainippon Ink and Chemicals, Inc.), and the mixture was stirred with a mechanical floss for 5 minutes. Thereafter, as a curing agent, 14 parts by weight of a mixture of chain extender 1,4-butanediol / crosslinking agent ε-caprolactone triol (Placcel 308: molecular weight 850) = 70/30 and 0.05 part by weight of water are mixed, What was stirred for 1 minute with mechanical floss was poured into a mold heated to 120 ° C. to a casting density of 0.4 g / cm 3 (casting amount / casting mold) and taken out after 40 minutes. . The obtained roll was polished and cut off to obtain a roll foam of outer diameter φ27 mm × inner diameter φ17 mm × width 26 mm.
（実施例２）
注型密度０．６ｇ／ｃｍ３とした以外は実施例１と同様にしてロール発泡体を得た。
(Example 2)
A roll foam was obtained in the same manner as in Example 1 except that the casting density was 0.6 g / cm 3 .
（実施例３）
注型密度０．８ｇ／ｃｍ３とした以外は実施例１と同様にしてロール発泡体を得た。
Example 3
A roll foam was obtained in the same manner as in Example 1 except that the casting density was 0.8 g / cm 3 .
（実施例４）
架橋剤としてεカプロラクトントリオール（プラクセル３０８：分子量８５０）のかわりに、εカプロラクトントリオール（プラクセル３２０：分子量２０００）を用いた以外は実施例２と同様にしてロール発泡体を得た。
Example 4
A roll foam was obtained in the same manner as in Example 2 except that ε-caprolactone triol (Placcel 320: molecular weight 2000) was used instead of ε-caprolactone triol (Placcel 308: molecular weight 850) as a crosslinking agent.
（比較例１）
架橋剤として、εカプロラクトントリオールのかわりにトリメチロールプロパン（ＴＭＰ）を用いた以外は実施例１と同様にしてロール発泡体を得た。
(Comparative Example 1)
A roll foam was obtained in the same manner as in Example 1 except that trimethylolpropane (TMP) was used in place of ε-caprolactone triol as a crosslinking agent.
（比較例２）
注型密度０．８ｇ／ｃｍ３とした以外は比較例１と同様にしてロール発泡体を得た。
(Comparative Example 2)
A roll foam was obtained in the same manner as in Comparative Example 1 except that the casting density was 0.8 g / cm 3 .
（比較例３）
架橋剤として、トリメチロールプロパン（ＴＭＰ）のかわりにトリメチロールエタン（ＴＭＥ）を用いた以外は比較例２と同様にしてロール発泡体を得た。
(Comparative Example 3)
A roll foam was obtained in the same manner as in Comparative Example 2 except that trimethylolethane (TME) was used in place of trimethylolpropane (TMP) as a crosslinking agent.
（比較例４）
架橋剤としてεカプロラクトントリオール（プラクセル３０８：分子量８５０）のかわりに、アジペート系トリオール（クラポールＦ２０１０：クラレ製）を用いた以外は実施例２と同様にしてロール発泡体を得た。
(Comparative Example 4)
A roll foam was obtained in the same manner as in Example 2, except that adipate triol (Kurapol F2010: manufactured by Kuraray Co., Ltd.) was used instead of ε-caprolactone triol (Placcel 308: molecular weight 850) as a crosslinking agent.
（試験例１）
各実施例および比較例のロール発泡体について、ゴム硬度（Ａｓｋｅｒ Ｃ）を測定した。結果を表１に示す。
(Test Example 1)
About the roll foam of each Example and the comparative example, rubber hardness (Asker C) was measured. The results are shown in Table 1.
（試験例２）
各実施例および比較例のロール発泡体をリバースロールとして、実機（リコー社製：ｉｍａｇｉｏ ＭＦ １５３０ １５枚／分の低速機）に取り付け、第二原図（薄紙）（Ａ４）を４０〜６０枚給紙した際の鳴き（異音）発生を官能試験にて確認した。なお、試験は常温常湿（２３℃、５５％ＲＨ）環境下で行った。結果を表１に示す。
(Test Example 2)
The roll foam of each Example and Comparative Example was used as a reverse roll and attached to an actual machine (manufactured by Ricoh: imagio MF 1530, 15 sheets / min.), And the second original drawing (thin paper) (A4) was fed 40-60 sheets. The occurrence of squeal (abnormal noise) when paper was made was confirmed by a sensory test. The test was conducted in an environment of normal temperature and normal humidity (23 ° C., 55% RH). The results are shown in Table 1.
この結果、架橋剤としてεカプロラクトントリオールを用いた実施例１〜４のロール発泡体は異音が観察されず、実施例２や実施例３に示すように硬度が高くても、鳴きの発生を防止することができることが分かった。一方、比較例１〜３のロール発泡体では鳴きが発生し、比較例１に示すように硬度が比較的低くても本試験例のように低速機では鳴きが発生することが分かった。また、εカプロラクトントリオールを用いると架橋剤の分子量が大きい実施例４でも鳴きを防止することができたが、アジペート系トリオールでは鳴きが発生した。 As a result, no abnormal noise was observed in the roll foams of Examples 1 to 4 using ε-caprolactone triol as a crosslinking agent, and even if the hardness was high as shown in Examples 2 and 3, the occurrence of squeal was observed. It was found that it can be prevented. On the other hand, it was found that squeal occurred in the roll foams of Comparative Examples 1 to 3, and squeal occurred in the low speed machine as in this test example even if the hardness was relatively low as shown in Comparative Example 1. Further, when ε-caprolactone triol was used, squeal could be prevented even in Example 4 where the molecular weight of the crosslinking agent was large, but squeal occurred in the adipate triol.
（試験例３）
カプロラクトン系ポリウレタンプレポリマー（ＲＶ２６００：大日本インキ化学工業株式会社製）１００重量部に、εカプロラクトントリオール（プラクセル３０８：分子量８５０、プラクセル３２０：分子量２０００、プラクセルＬ３３０ＡＬ：分子量８５０ ダイセル化学工業製）又はアジペート系トリオール（クラポールＦ２０１０：分子量２０００、クラポールＦ３０１０：分子量３０００ クラレ製）を官能基モル数が等しくなるようにした表２に示す量を５０℃でそれぞれ混合して攪拌し、トリオールが６０秒より早く溶解したものを◎、６０秒〜１２０秒で溶解したものを○、溶解するのに１２０秒より多く経過したものを△として相溶性を評価した。結果を表２に示す。
(Test Example 3)
Caprolactone-based polyurethane prepolymer (RV2600: manufactured by Dainippon Ink & Chemicals, Inc.) in 100 parts by weight, ε-caprolactone triol (Placcel 308: molecular weight 850, Plaxel 320: molecular weight 2000, Plaxel L330AL: molecular weight 850 manufactured by Daicel Chemical Industries) or adipate System triols (Kurapol F2010: molecular weight 2000, Kurapol F3010: molecular weight 3000 made by Kuraray) were mixed at 50 ° C. with the amounts shown in Table 2 so that the number of moles of functional groups was equal, and the triol was faster than 60 seconds. The solubility was evaluated as ◎, the solution dissolved in 60 seconds to 120 seconds as ◯, and the solution that passed more than 120 seconds to be dissolved as Δ. The results are shown in Table 2.
この結果、εカプロラクトントリオールはカプロラクトン系ポリウレタンプレポリマーと相溶性がよかった。また、分子量が同じもので比較すると、アジペート系トリオールより、εカプロラクトントリオールの方が相溶性が高いことが明らかとなった。 As a result, ε-caprolactone triol was compatible with the caprolactone-based polyurethane prepolymer. In addition, when the same molecular weights were compared, it was revealed that ε-caprolactone triol is more compatible than adipate triol.
１０ リバースロール
２１ 給紙駆動ベルト
２２ ピックアップロール
３０ 紙葉類
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