JPS61115922A - Production of crosslinked urea/formaldehyde polymer particle - Google Patents
Production of crosslinked urea/formaldehyde polymer particleInfo
- Publication number
- JPS61115922A JPS61115922A JP23746084A JP23746084A JPS61115922A JP S61115922 A JPS61115922 A JP S61115922A JP 23746084 A JP23746084 A JP 23746084A JP 23746084 A JP23746084 A JP 23746084A JP S61115922 A JPS61115922 A JP S61115922A
- Authority
- JP
- Japan
- Prior art keywords
- urea
- formaldehyde
- polymer particles
- crosslinked
- hammer mill
- 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
Abstract
Description
【発明の詳細な説明】
〔産業上の利用分野〕
本発明によって得られる架橋尿素ホルムアルデヒドポリ
マー粒子は紙製品の不透明度を増加させン
るための充填剤として有用なものであり、本発明は上記
架橋尿素ホルムアルデヒドポリマー粒子を連続的に生産
性よく製造する方法、特に架橋尿素ホルムアルデヒド樹
脂の粉砕方法に関するものである。DETAILED DESCRIPTION OF THE INVENTION [Industrial Field of Application] The crosslinked urea formaldehyde polymer particles obtained by the present invention are useful as fillers for increasing the opacity of paper products, and the present invention The present invention relates to a method for continuously producing crosslinked urea formaldehyde polymer particles with good productivity, and in particular to a method for pulverizing crosslinked urea formaldehyde resin.
架橋尿素ホルムアルデヒドポリマー粒子が紙製品の不透
明度を増加させるための充填剤として有用なものである
こと及びその製造法として尿素とホルムアルデヒドとの
初期給金物と酸性水溶液とを混合して混合液を固化せし
め、その固化物を粉砕して架橋尿素ホルムアルデヒドポ
リマー粒子を得る方法があることは、特開昭５４−１３
５８９３号、同５７−５３５１９号などに記載されてい
るところである。Cross-linked urea-formaldehyde polymer particles are useful as fillers for increasing the opacity of paper products, and a method for producing the same includes mixing an initial charge of urea and formaldehyde with an acidic aqueous solution and solidifying the mixture. However, it is known that there is a method to obtain crosslinked urea formaldehyde polymer particles by pulverizing the solidified product, as disclosed in Japanese Patent Application Laid-Open No. 54-13.
It is described in No. 5893, No. 57-53519, etc.
この架橋尿素ホルムアルデヒドポリマー粒子は平均粒子
径が０．１〜１．０μの個々の粒子（以下１次粒子と略
称）が平均粒子径で１〜３０μ、好ましくは１〜１０μ
に凝集したもの（以下２次粒子と略称）である。These cross-linked urea formaldehyde polymer particles have an average particle size of 1 to 30 μ, preferably 1 to 10 μ.
(hereinafter abbreviated as secondary particles).
しかしながら、従来技術の範囲では、架橋尿素ホルムア
ルデヒド樹脂の固化物を工場的規模で連続的かつ能率的
に粉砕処理して目的とするポリマ−粒子を得る具体的方
法は未だ提案されていない。However, within the scope of the prior art, a specific method for obtaining desired polymer particles by continuously and efficiently pulverizing a solidified crosslinked urea formaldehyde resin on a factory scale has not yet been proposed.
この問題が解決されない限り工場的規模で連続的に架橋
尿素ホルムアルデヒドポリマー粒子を製造することは困
難である。Unless this problem is solved, it will be difficult to continuously produce crosslinked urea formaldehyde polymer particles on a factory scale.
ところで、上記架橋尿素ホルムアルデヒド樹脂の固化物
は、工場的規模で製造する場合、大きいものでは、平面
が３０ｃＷＬ×３０ｃＩｒしくらいの板状のものになる
こともあるので、これを−挙に紙製品の填料として使用
できる平均２次粒径１．０〜３０ること及び生産性のよ
い工程であることを条件とすれば、この粉砕処理は段階
的粉砕工程とならざるを得ない。例えば、粗粉砕工程及
び微粉砕工程を組合せ、それぞれに最も効果的な粉砕手
段を採用することが必要である。本発明は、このような
工程の流れの中において粗粉砕工程の粉砕手段を重点的
検討対象としたものである。By the way, when the solidified product of the cross-linked urea formaldehyde resin is manufactured on a factory scale, it may be a large plate with a plane of about 30 cWL x 30 cIr. This pulverization process must be a stepwise pulverization process, provided that the average secondary particle size is 1.0 to 30, which can be used as a filler, and that the process has good productivity. For example, it is necessary to combine a coarse grinding process and a fine grinding process and adopt the most effective grinding means for each. The present invention focuses on the pulverizing means of the coarse pulverizing process in the flow of such processes.
上述のとおり、本発明は段階的粉砕工程における粗粉砕
工程を検討対象としたものであるが、この粗粉砕工程の
粉砕手段として採用する装置或は機械としては、上記の
大きさの架橋尿素ホルムアルデヒド樹脂の固化物を連続
的に受入れ遅滞することなく微粉砕機が受入れられる程
度（粒径１〜２ ｍｓ （らい）にまで固化物を粉砕で
きるものでなければならない。As mentioned above, the subject of the present invention is the coarse pulverization process in the stepwise pulverization process, and the apparatus or machine used as the pulverization means in this coarse pulverization process is a cross-linked urea formaldehyde of the above size. It must be capable of continuously accepting the solidified resin and pulverizing the solidified material to a particle size of 1 to 2 ms that can be accepted by the pulverizer without delay.
本発明者らの検討した結果によれば、上記問題解決の手
段として、上記架橋尿素ホルムアルデヒド樹脂の固化物
を一挙に微粉砕機に供給できる程度にまで粉砕すること
は困難であり、結局二段階粗粉砕を行なうのが適当であ
るというのが発明者らの結論である。According to the results of studies conducted by the present inventors, as a means to solve the above problem, it is difficult to pulverize the solidified product of the crosslinked urea formaldehyde resin to the extent that it can be fed to the pulverizer all at once, and in the end, it is carried out in two stages. The inventors have concluded that coarse pulverization is appropriate.
また、二段階粗粉砕に組み合せて用いる装置或は機械に
ついても種々のものが考えられるが、効率面から考えて
本発明者らが得た結論は第一段階でパドルスクリューを
用いて固化物を粗粉砕しながら第二段階へ送り、第二段
階でハンマーミル（ハンマークラッシャーというも同じ
、以下同様）を用いて微粉砕機で受入れられる程度にま
で粉砕するのが最適手段であるということである。In addition, various devices or machines can be considered to be used in combination with the two-stage coarse pulverization, but from an efficiency standpoint, the conclusion reached by the present inventors is that in the first stage, a paddle screw is used to remove the solidified material. The optimal method is to send the material to the second stage while coarsely crushing it, and in the second stage, use a hammer mill (also referred to as a hammer crusher, hereinafter the same) to crush it to a level that can be accepted by a fine crusher. .
本発明で用いるパドルスクリュー及びハンマーミルにつ
いて若干の説明を加えれば、本発明で用いるパドルスク
リューとしては、通常使用されているようなものでもさ
しつかえない。例えば１本のスクリュー回転軸にパドル
を取付けたものでもよいし、パドルを取付けた２本のス
クリュー回転軸を配置し互に反対方向に回転して輸送物
を積極的に粉砕しながら輸送するようにしたものでもよ
い。スクＩＪ、−コンベアーは通常混合輸送を目的とす
るものであるが、本発明で粉砕処理する架橋尿素ホルム
アルデヒド樹脂の固化物は微細粒子の極めて大きい凝集
体であるのでパドルスクリューを用いることによって固
化物を輸送と同時に予備的粗粉砕することができるので
好適であり、固形物の粉砕処理能力も大きい。If a few explanations are given regarding the paddle screw and hammer mill used in the present invention, the paddle screw used in the present invention may be one that is commonly used. For example, a paddle may be attached to one screw rotating shaft, or two screw rotating shafts with paddles attached may be arranged and rotated in opposite directions to actively crush the transported object while transporting it. It is also possible to use A conveyor is usually used for mixed transportation, but since the solidified crosslinked urea formaldehyde resin to be pulverized in the present invention is an extremely large aggregate of fine particles, a paddle screw is used to transport the solidified material. It is suitable because it can carry out preliminary coarse pulverization at the same time as transportation, and has a large capacity for pulverizing solids.
本発明で用いるハンマーミルも、特に本発明用に改良さ
れたものである必要はなく、通常販売使用されているも
のでよい。The hammer mill used in the present invention does not need to be particularly improved for the present invention, and may be one that is commonly sold and used.
以下、本発明の作用、効果を工程に従って具体的に説明
することにより、実施例に代える。Hereinafter, the functions and effects of the present invention will be specifically explained according to the steps, instead of examples.
尿素とホルムアルデヒドとを反応させて得た尿素ホルム
アルデヒド初期縮合物と酸性水溶液とを混合して固化さ
せた架橋尿素ホルムアルデヒド樹脂の板状固化物を２本
の回転軸を配置したパドルスクリューに供給する。上記
固化物はパドルスクリューによってハンマーミルに送ら
れる間に予備的に粉砕されて粒径１〜２ｃｌｒＬの球状
物にまで粉砕されてハンマーミルに入る。ハンマーミル
では、上部から水を加えて流動性を保ちながら、この球
状物はさらに粗粉砕されて微粉砕機に受入れられる程度
の粒径１〜２ｉ＋ｔの粒子にまで粉砕される。A plate-shaped solidified crosslinked urea formaldehyde resin obtained by mixing a urea formaldehyde initial condensate obtained by reacting urea and formaldehyde with an acidic aqueous solution and solidifying it is supplied to a paddle screw equipped with two rotating shafts. While the solidified material is sent to the hammer mill by a paddle screw, it is preliminarily pulverized into spherical particles having a particle size of 1 to 2 clrL, and then enters the hammer mill. In the hammer mill, water is added from the top to maintain fluidity, and the spherical material is further coarsely ground into particles having a particle size of 1 to 2i+t that can be accepted by a fine grinder.
このようにして得られる粗粉砕粒子は、さらに微粉砕機
にかけられて、目的物である架橋尿素ホルムアルデヒド
ポリマー粒子にまで微粉砕されることになる。The coarsely pulverized particles thus obtained are further subjected to a pulverizer to be pulverized into the target crosslinked urea formaldehyde polymer particles.
本発明方法により粗粉砕されたものは、いかなる微粉砕
機、例えば自由粉砕機、コロイドミルなどに適用しても
よい。The material coarsely ground by the method of the present invention may be applied to any fine grinder, such as a free grinder or a colloid mill.
紙製品の不透明度を増加させるための充填剤として使用
できる架橋尿素ホルムアルデヒドポリマー粒子を連続的
に生産性よく製造する工程においては、架橋尿素ホルム
アルデヒド樹脂の固化物をいかに効果的に粉砕処理でき
るかが、その工程の死命を制する要件の１つである。In the process of continuously and efficiently manufacturing cross-linked urea-formaldehyde polymer particles that can be used as a filler to increase the opacity of paper products, it is important to effectively crush the solidified cross-linked urea-formaldehyde resin. , is one of the requirements that determines the life and death of the process.
本発明によれば固化物は停滞することなくしかも、目的
とする粒度まで極めて円滑に粉砕することができる。し
たがって本発明によれば連続的に生産性よく、架橋尿素
ホルムアルデヒドポリマー粒子を製造することができる
。According to the present invention, the solidified material does not stagnate and can be crushed extremely smoothly to the desired particle size. Therefore, according to the present invention, crosslinked urea formaldehyde polymer particles can be manufactured continuously and with good productivity.
Claims (1)
アルデヒド初期縮合物と酸性水溶液とを連続的に混合し
て混合液を反応固化せしめ、その固化物を粉砕して架橋
尿素ホルムアルデヒドポリマー粒子を製造する方法にお
いて、上記粉砕工程の一部にパドルスクリュー及びハン
マーミルを連結して使用することを特徴とする架橋尿素
ホルムアルデヒドポリマー粒子の製造法。In a method for manufacturing crosslinked urea formaldehyde polymer particles by continuously mixing a urea formaldehyde initial condensate obtained by reacting urea and formaldehyde with an acidic aqueous solution, reacting and solidifying the mixed solution, and pulverizing the solidified product, A method for producing crosslinked urea-formaldehyde polymer particles, characterized in that a paddle screw and a hammer mill are used in connection with a part of the above-mentioned pulverization step.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP23746084A JPS61115922A (en) | 1984-11-13 | 1984-11-13 | Production of crosslinked urea/formaldehyde polymer particle |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP23746084A JPS61115922A (en) | 1984-11-13 | 1984-11-13 | Production of crosslinked urea/formaldehyde polymer particle |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPS61115922A true JPS61115922A (en) | 1986-06-03 |
| JPH0365805B2 JPH0365805B2 (en) | 1991-10-15 |
Family
ID=17015663
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP23746084A Granted JPS61115922A (en) | 1984-11-13 | 1984-11-13 | Production of crosslinked urea/formaldehyde polymer particle |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPS61115922A (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| EP1741536A1 (en) * | 2005-07-06 | 2007-01-10 | Purac Biochem BV | Method for comminuting polymeric shaped articles by milling |
Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS57133146A (en) * | 1981-02-10 | 1982-08-17 | Mitsui Toatsu Chem Inc | Preparation of urea resin filler |
-
1984
- 1984-11-13 JP JP23746084A patent/JPS61115922A/en active Granted
Patent Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS57133146A (en) * | 1981-02-10 | 1982-08-17 | Mitsui Toatsu Chem Inc | Preparation of urea resin filler |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| EP1741536A1 (en) * | 2005-07-06 | 2007-01-10 | Purac Biochem BV | Method for comminuting polymeric shaped articles by milling |
| WO2007003659A1 (en) * | 2005-07-06 | 2007-01-11 | Purac Biochem Bv | Method for comminuting polymeric shaped articles by milling |
| US7762482B2 (en) | 2005-07-06 | 2010-07-27 | Purac Biochem Bv | Method for comminuting polymeric shaped articles by milling |
Also Published As
| Publication number | Publication date |
|---|---|
| JPH0365805B2 (en) | 1991-10-15 |
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