JP2016217679A - Method and device for drying glass fiber wound body - Google Patents
Method and device for drying glass fiber wound body Download PDFInfo
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本発明は、水分を含んだ集束剤が塗布されたガラス繊維を巻き取ることによって形成される例えばロービング、ケーキ等のガラス繊維巻回体を乾燥させる乾燥方法及び乾燥装置に関する。 The present invention relates to a drying method and a drying apparatus for drying glass fiber windings such as rovings and cakes formed by winding glass fibers coated with moisture-containing sizing agent.
一般に、ガラス繊維は、その製造工程で、水分を含んだガラス繊維集束剤が塗布され、湿った状態でコレット、ボビン等に巻き取られ、ガラス繊維巻回体となる。そして、その後、電磁波加熱（誘電加熱）器等によって、ガラス繊維巻回体のガラス繊維は乾燥される（例えば特許文献１参照）。 In general, glass fiber is coated with a glass fiber sizing agent containing moisture in the manufacturing process, and is wound around a collet, bobbin or the like in a wet state to form a glass fiber wound body. Thereafter, the glass fiber of the glass fiber wound body is dried by an electromagnetic heating (dielectric heating) device or the like (see, for example, Patent Document 1).
ところで、電磁波は、ガラス繊維中に含まれる水分子にエネルギーを付与し、ガラス繊維巻回体を均一に加熱できるため、多量の水分を含んだガラス繊維を短時間に乾燥させることには適している。しかし、水分子が蒸発してしまうとそれ以上加熱する能力はないため、集束剤を被膜化（キュア）させる能力は十分ではない。そのため、集束剤を十分に被膜化するためには誘電加熱以降の工程でガラス繊維巻回体を加熱する必要がある。一方で、ガラス繊維巻回体を過度に加熱すると、過度に集束剤が被膜化され、これに起因して過度の着色等の弊害が生じる可能性がある。 By the way, the electromagnetic wave imparts energy to water molecules contained in the glass fiber and can uniformly heat the glass fiber wound body, so that it is suitable for drying glass fiber containing a large amount of moisture in a short time. Yes. However, if the water molecules evaporate, there is no ability to heat any more, so the ability to coat the sizing agent is not sufficient. Therefore, in order to sufficiently coat the sizing agent, it is necessary to heat the glass fiber wound body in the steps after dielectric heating. On the other hand, when the glass fiber wound body is excessively heated, the sizing agent is excessively formed into a film, which may cause adverse effects such as excessive coloring.
本発明は、上記事情に鑑み、短時間でガラス繊維に含まれる水分を十分に乾燥させ、集束剤を適度に被膜化することが可能なガラス繊維巻回体の乾燥方法及び乾燥装置を提供することを技術的課題とする。 In view of the above circumstances, the present invention provides a glass fiber wound body drying method and drying apparatus capable of sufficiently drying moisture contained in glass fibers in a short time and capable of appropriately forming a sizing agent. This is a technical issue.
上記課題を解決するために創案された本発明に係るガラス繊維巻回体の乾燥方法は、水分を含んだ集束剤が塗布されたガラス繊維を巻き取ることによって形成されるガラス繊維巻回体を乾燥させる乾燥方法であって、前記ガラス繊維巻回体を誘電加熱で乾燥させる第１乾燥工程と、前記第１乾燥工程で乾燥された前記ガラス繊維巻回体を雰囲気加熱で乾燥させる第２乾燥工程とを備えたことに特徴づけられる。ここで、雰囲気加熱とは、加熱対象に対して、外部から、伝導、放射、対流等によって熱を付与する加熱のことを意味し、例えば熱風加熱や赤外線加熱等が挙げられる（以下、同様）。 In order to solve the above problems, a method for drying a glass fiber wound body according to the present invention includes a glass fiber wound body formed by winding a glass fiber coated with a sizing agent containing moisture. A drying method for drying, a first drying step for drying the glass fiber wound body by dielectric heating, and a second drying for drying the glass fiber wound body dried in the first drying step by atmospheric heating. And a process. Here, the atmosphere heating means heating that gives heat to the object to be heated from the outside by conduction, radiation, convection, etc., and examples thereof include hot air heating and infrared heating (the same applies hereinafter). .
この構成では、第１乾燥工程の誘電加熱によって短時間でガラス繊維巻回体のガラス繊維に含まれる水分を十分に乾燥させることができる。また、第１乾燥工程で乾燥されたガラス繊維巻回体に対し、第２乾燥工程の雰囲気加熱によって、集束剤を適度に被膜化することできる。すなわち、本発明のガラス繊維巻回体の乾燥装置によれば、短時間でガラス繊維に含まれる水分を十分に乾燥させ、集束剤を適度に被膜化することが可能である。 In this configuration, the moisture contained in the glass fiber of the glass fiber wound body can be sufficiently dried in a short time by the dielectric heating in the first drying step. Moreover, a sizing agent can be appropriately formed into a film by heating the atmosphere of the second drying step on the glass fiber wound body dried in the first drying step. That is, according to the glass fiber wound body drying apparatus of the present invention, it is possible to sufficiently dry the moisture contained in the glass fiber in a short time and form the sizing agent appropriately.
上記の構成において、前記第２乾燥工程の加熱温度が１２０℃〜１４０℃であることが好ましい。 Said structure WHEREIN: It is preferable that the heating temperature of a said 2nd drying process is 120 to 140 degreeC.
この構成であれば、着色を防止しつつ、集束剤を十分に被膜化することができる。 If it is this structure, a sizing agent can fully be formed into a film, preventing coloring.
上記の構成において、前記第２乾燥工程の加熱時間が１時間〜５時間であることが好ましい。 Said structure WHEREIN: It is preferable that the heating time of a said 2nd drying process is 1 hour-5 hours.
この構成であれば、更に確実に、着色を防止しつつ、集束剤を十分に被膜化することができる。 If it is this structure, a sizing agent can fully be formed into a film, preventing a coloring more reliably.
上記の構成において、前記第１乾燥工程の誘電加熱に、周波数が４〜８０ＭＨｚである高周波を使用することが好ましい。 Said structure WHEREIN: It is preferable to use the high frequency whose frequency is 4-80 MHz for the dielectric heating of a said 1st drying process.
この構成であれば、第１乾燥工程でガラス繊維巻回体を適度に乾燥させることが可能である。 If it is this structure, it is possible to dry a glass fiber winding body moderately at a 1st drying process.
上記の構成において、前記ガラス繊維のガラス組成が、酸化物基準の質量％で、ＳｉＯ2 ５２〜６２％、Ａｌ2Ｏ3 １０〜１６％、Ｂ2Ｏ3 ０〜８％、ＭｇＯ ０〜５％、ＣａＯ １６〜２５％及びＲ2Ｏ（但し、Ｒは、Ｌｉ、Ｎａ及びＫのうちの少なくとも１つ） ０〜２％であり、前記集束剤として、ウレタン系、エポキシ系、酢酸ビニル系の何れか１つを使用することが好ましい。 In the above configuration, the glass composition of the glass fiber,% by mass on the oxide basis, SiO 2 52~62%, Al 2 O 3 10~16%, B 2 O 3 0~8%, MgO 0~5 %, CaO 16-25% and R 2 O (where R is at least one of Li, Na and K) 0-2%, and the sizing agent includes urethane, epoxy, vinyl acetate It is preferable to use any one of these.
この構成であれば、ほとんど導電性が無いガラス繊維巻回体の製品を製造することができる。 If it is this structure, the product of the glass fiber winding body which hardly has electroconductivity can be manufactured.
上記課題を解決するために創案された本発明に係るガラス繊維巻回体の乾燥装置は、水分を含んだ集束剤が塗布されたガラス繊維を巻き取ることによって形成されるガラス繊維巻回体を乾燥させる乾燥装置であって、前記ガラス繊維巻回体を誘電加熱で乾燥させる第１乾燥手段と、前記第１乾燥手段で乾燥された前記ガラス繊維巻回体を雰囲気加熱で乾燥させる第２乾燥手段とを備えたことに特徴づけられる。 The glass fiber wound body drying apparatus according to the present invention, which has been created in order to solve the above-mentioned problems, includes a glass fiber wound body formed by winding glass fibers coated with a sizing agent containing moisture. A drying device for drying, the first drying means for drying the glass fiber wound body by dielectric heating, and the second drying for drying the glass fiber wound body dried by the first drying means by atmospheric heating. It is characterized by having means.
この構成であれば、冒頭で説明した構成と実質的に同様の作用及び効果を得ることができる。 With this configuration, substantially the same operations and effects as the configuration described at the beginning can be obtained.
以上のように本発明によれば、短時間でガラス繊維に含まれる水分を十分に乾燥させ、集束剤を適度に被膜化することが可能なガラス繊維巻回体の乾燥方法及び乾燥装置を提供することができる。 As described above, according to the present invention, there is provided a drying method and a drying apparatus for a glass fiber wound body capable of sufficiently drying moisture contained in glass fibers in a short time and capable of appropriately forming a sizing agent. can do.
以下、本発明を実施するための形態について図面に基づき説明する。 Hereinafter, embodiments for carrying out the present invention will be described with reference to the drawings.
図１は、本発明の実施形態に係るガラス繊維巻回体の乾燥装置を示す概略斜視図である。このガラス繊維巻回体の乾燥装置１は、ガラス繊維巻回体２を乾燥させる乾燥装置である。乾燥装置１は、ガラス繊維巻回体２を誘電加熱で乾燥させる第１乾燥手段３と、第１乾燥手段３で乾燥されたガラス繊維巻回体２を雰囲気加熱で乾燥させる第２乾燥手段４と、ガラス繊維巻回体２を搬送する搬送手段５とを備える。なお、第１乾燥手段３による乾燥工程と第２乾燥手段４による乾燥工程は、それぞれ、本発明のガラス繊維巻回体の乾燥方法の第１乾燥工程と第２乾燥工程に対応する。 FIG. 1 is a schematic perspective view showing a glass fiber wound body drying apparatus according to an embodiment of the present invention. The glass fiber wound body drying apparatus 1 is a drying apparatus that dries the glass fiber wound body 2. The drying apparatus 1 includes a first drying unit 3 that dries the glass fiber wound body 2 by dielectric heating, and a second drying unit 4 that dries the glass fiber wound body 2 dried by the first drying unit 3 by atmospheric heating. And a conveying means 5 for conveying the glass fiber wound body 2. In addition, the drying process by the 1st drying means 3 and the drying process by the 2nd drying means 4 are respectively corresponded to the 1st drying process and the 2nd drying process of the drying method of the glass fiber winding body of this invention.
図２に拡大して示すガラス繊維巻回体２は、水分を含んだ集束剤が塗布されたガラス繊維を巻き取ることによって形成されるものである。ガラス繊維巻回体２は、直接巻き取り法によって製造されるガラスロービング（ＤＷＲ）の製品となるものである。つまり、ガラス繊維巻回体２を、乾燥装置１によって、集束剤に含まれる水分を蒸発させると、集束剤の被膜が形成された状態となり、ＤＷＲの製品となる。 A glass fiber wound body 2 shown in an enlarged manner in FIG. 2 is formed by winding up glass fibers coated with a sizing agent containing moisture. The glass fiber wound body 2 is a glass roving (DWR) product manufactured by a direct winding method. In other words, when the moisture contained in the sizing agent is evaporated from the glass fiber wound body 2 by the drying device 1, a sizing agent coating is formed and a DWR product is obtained.
乾燥させる前のガラス繊維巻回体２は、以下のような工程によって形成される。まず、各種の無機ガラス原料を高温状態に加熱されたガラス溶融槽に投入し、この内部で溶融した後に、白金製ブッシングより引き出された溶融ガラスを複数のガラスフィラメントに引き伸ばし、それぞれのガラスフィラメントの表面に集束剤を塗布する。次いで、これらの複数のガラスフィラメントを引き揃えて、ガラスストランド２ａとし、回転するコレットに綾を掛けながら巻き取る。これによって、乾燥させる前のガラス繊維巻回体２が形成される。 The glass fiber wound body 2 before being dried is formed by the following process. First, various inorganic glass raw materials are put into a glass melting tank heated to a high temperature state, and after melting inside this, the molten glass drawn from a platinum bushing is stretched to a plurality of glass filaments. Apply sizing agent to the surface. Subsequently, these glass filaments are drawn together to form a glass strand 2a, which is wound up with a twill on a rotating collet. Thereby, the glass fiber winding body 2 before making it dry is formed.
ガラスストランド２ａの直径は、例えば１ｍｍ〜１０ｍｍである。ガラスストランド２ａは、例えば１００本〜１００００本のガラスフィラメントで構成される。ガラスストランド２ａとなるガラスフィラメントの直径は、例えば１μｍ〜１００μｍである。 The diameter of the glass strand 2a is, for example, 1 mm to 10 mm. The glass strand 2a is composed of, for example, 100 to 10000 glass filaments. The diameter of the glass filament used as the glass strand 2a is 1 micrometer-100 micrometers, for example.
無機ガラス原料は、Ｅガラスのガラス組成（無アルカリガラス組成）となるように調合される。Ｅガラスのガラス組成は、酸化物基準の質量％で、ＳｉＯ2 ５２〜６２％、Ａｌ2Ｏ3 １０〜１６％、Ｂ2Ｏ3 ０〜８％、ＭｇＯ ０〜５％、ＣａＯ １６〜２５％及びＲ2Ｏ（但し、Ｒは、Ｌｉ、Ｎａ及びＫのうちの少なくとも１つ） ０〜２％である。 An inorganic glass raw material is prepared so that it may become the glass composition (non-alkali glass composition) of E glass. Glass composition of E glass, in weight percent on the oxide basis, SiO 2 52~62%, Al 2 O 3 10~16%, B 2 O 3 0~8%, 0~5% MgO, CaO 16~25 % And R 2 O (where R is at least one of Li, Na and K) 0 to 2%.
ガラスフィラメントに塗布される集束剤としては、ウレタン系、エポキシ系、酢酸ビニル系の何れもが適用可能である。これらの集束剤には、樹脂の他に、潤滑剤やシランカップリング剤を添加することができる。 As the sizing agent applied to the glass filament, any of urethane, epoxy, and vinyl acetate can be applied. In addition to the resin, a lubricant or a silane coupling agent can be added to these sizing agents.
第１乾燥手段３は、その内側の両側方に誘電加熱のための電極が配設されている。第１乾燥手段３による誘電加熱は、ガラス繊維巻回体２内の水分子を回転又は振動させるための条件であれば特に制限は無く、誘電加熱に高周波を使用する場合は、周波数が例えば４〜８０ＭＨｚのものを使用できる。また、誘電加熱にマイクロ波を使用してもよい。 The first drying means 3 is provided with electrodes for dielectric heating on both inner sides. The dielectric heating by the first drying means 3 is not particularly limited as long as it is a condition for rotating or vibrating the water molecules in the glass fiber wound body 2. When a high frequency is used for dielectric heating, the frequency is, for example, 4 Up to 80 MHz can be used. Further, microwaves may be used for dielectric heating.
第１乾燥手段３による加熱時間は、水分が十分に乾燥できる時間以上であれば特に制限はなく、水分が乾燥した後は温度が上昇しないので、過剰に時間を延ばしても製品の品質に問題は無い。 The heating time by the first drying means 3 is not particularly limited as long as the moisture can be sufficiently dried, and the temperature does not rise after the moisture is dried, so there is a problem in the quality of the product even if the time is excessively extended. There is no.
第２乾燥手段４による雰囲気加熱としては、例えば熱風加熱や赤外線加熱等が挙げられる。雰囲気加熱として熱風加熱を採用している場合には、第２乾燥手段４は、その内側の両側方に、熱風を生じるための熱源と、熱風を送風するためのファンが配設されている。雰囲気加熱として赤外線加熱を採用している場合には、第２乾燥手段４は、その内側の両側方に、赤外線ヒータが配設されている。 Examples of the atmosphere heating by the second drying means 4 include hot air heating and infrared heating. When hot air heating is adopted as the atmosphere heating, the second drying means 4 is provided with a heat source for generating hot air and a fan for blowing the hot air on both inner sides. In the case where infrared heating is employed as the atmosphere heating, the second drying means 4 is provided with infrared heaters on both inner sides.
第２乾燥手段４による加熱温度は、１２０℃〜１４０℃が好ましい。加熱温度が１２０℃未満の場合には、集束剤の被膜化をすすめることが難しく、加熱温度が１４０℃を超える場合には、着色し過ぎる可能性がある。この観点から、加熱温度は、１２２℃〜１３８℃がより好ましく、１２５℃〜１３５℃が最も好ましい。 The heating temperature by the second drying means 4 is preferably 120 ° C to 140 ° C. When the heating temperature is less than 120 ° C., it is difficult to promote the formation of the sizing agent, and when the heating temperature exceeds 140 ° C., there is a possibility that the coloring is excessive. In this respect, the heating temperature is more preferably 122 ° C to 138 ° C, and most preferably 125 ° C to 135 ° C.
第２乾燥手段４による加熱時間は、１時間〜５時間が好ましい。加熱時間が１時間未満の場合には、集束剤の被膜化が十分にできず、加熱時間が５時間を超える場合には、着色しすぎる可能性がある。この観点から、加熱時間は、１．５時間〜４．５時間がより好ましく、２時間〜４時間が最も好ましい。 The heating time by the second drying means 4 is preferably 1 hour to 5 hours. When the heating time is less than 1 hour, the sizing agent cannot be sufficiently coated, and when the heating time exceeds 5 hours, the sizing agent may be colored too much. In this respect, the heating time is more preferably 1.5 hours to 4.5 hours, and most preferably 2 hours to 4 hours.
なお、第２乾燥手段４による雰囲気加熱として、熱風加熱を採用した場合、ガラス繊維巻回体２の外層はすぐに温度が上昇するが、内部の水が蒸発するために長い加熱時間が必要となる。そのため、ガラス繊維巻回体２の外層は長時間高温にさらされることになり、着色しすぎる可能性がある。 In addition, when hot air heating is employ | adopted as atmosphere heating by the 2nd drying means 4, although the temperature of the outer layer of the glass fiber winding body 2 rises immediately, since internal water evaporates, a long heating time is required. Become. Therefore, the outer layer of the glass fiber wound body 2 is exposed to a high temperature for a long time, and may be colored too much.
本実施形態では、搬送手段５は、コンベアで構成され、白矢印で示すように、ガラス繊維巻回体２を、連続的に、第１乾燥手段３に搬入及び搬出し、その後、第２乾燥手段４に搬入及び搬出する。しかし、搬送手段５は、これに限定されず、例えば台車等の別の手段で構成されてもよい。また、搬送手段５は、例えば、第１乾燥手段３にガラス繊維巻回体２を搬入及び搬出するコンベアと、第２乾燥手段４にガラス繊維巻回体２を搬入及び搬出するコンベアと、これらのコンベアの間でガラス繊維巻回体２を搬送する台車とで構成されてもよい。 In this embodiment, the conveyance means 5 is comprised with a conveyor, and as shown by the white arrow, the glass fiber winding body 2 is continuously carried in and out of the 1st drying means 3, and it is 2nd drying after that. Carry in and out means 4. However, the conveying means 5 is not limited to this, and may be constituted by another means such as a carriage. The conveying means 5 includes, for example, a conveyor that carries the glass fiber wound body 2 into and out of the first drying means 3, a conveyor that carries the glass fiber wound body 2 into and out of the second drying means 4, and these It may be comprised with the trolley | bogie which conveys the glass fiber winding body 2 between these conveyors.
また、本実施形態では、第１乾燥手段３と第２乾燥手段４のそれぞれにおいて、ガラス繊維巻回体２を１個ずつ乾燥しているが、バッチ式で、ガラス繊維巻回体２を複数個ずつ乾燥してもよい。また、第１乾燥手段３と第２乾燥手段４のそれぞれの内部に、ガラス繊維巻回体２が配置された時に、搬送手段５によるガラス繊維巻回体２の移動を停止してもよいし、搬送手段５によるガラス繊維巻回体２の移動を継続したままでもよい。 Moreover, in this embodiment, in each of the 1st drying means 3 and the 2nd drying means 4, although the glass fiber winding body 2 is dried one by one, it is a batch type and a plurality of glass fiber winding bodies 2 are provided. You may dry it piece by piece. Further, when the glass fiber wound body 2 is disposed in each of the first drying means 3 and the second drying means 4, the movement of the glass fiber wound body 2 by the conveying means 5 may be stopped. The movement of the glass fiber wound body 2 by the conveying means 5 may be continued.
また、第１乾燥手段３及び第２乾燥手段４の搬入口及び搬出口には、シャッターがあってもよいし、なくてもよい。 In addition, there may or may not be a shutter at the entrance and exit of the first drying means 3 and the second drying means 4.
以上のように構成された本実施形態のガラス繊維巻回体２の乾燥装置１では、以下の効果を享受できる。 In the drying device 1 of the glass fiber wound body 2 of the present embodiment configured as described above, the following effects can be enjoyed.
第１乾燥手段３の誘電加熱によって短時間でガラス繊維巻回体２のガラス繊維に含まれる水分を十分に乾燥させることができる。また、第１乾燥手段３で乾燥されたガラス繊維巻回体２に対し、第２乾燥手段４の雰囲気加熱によって、集束剤を適度に被膜化することできる。すなわち、本実施形態のガラス繊維巻回体２の乾燥装置１によれば、短時間でガラス繊維に含まれる水分を十分に乾燥させ、集束剤を適度に被膜化することが可能である。 The water contained in the glass fiber of the glass fiber wound body 2 can be sufficiently dried in a short time by the dielectric heating of the first drying means 3. Further, the glass fiber wound body 2 dried by the first drying unit 3 can be appropriately coated with the sizing agent by heating the atmosphere of the second drying unit 4. That is, according to the drying device 1 of the glass fiber wound body 2 of the present embodiment, it is possible to sufficiently dry the moisture contained in the glass fiber in a short time and form the sizing agent appropriately.
本願の発明者らは、本発明に係るガラス繊維巻回体２の乾燥装置１に関連して、乾燥方法が異なるガラス繊維巻回体２を作製し、その開繊幅と走行毛羽量を評価した。 The inventors of the present application produce a glass fiber wound body 2 having a different drying method in relation to the drying apparatus 1 for the glass fiber wound body 2 according to the present invention, and evaluate the spread width and the running fluff amount. did.
図３を参照しつつ、開繊幅と走行毛羽量を説明する。図３は、ガラス繊維巻回体２から長繊維ペレット６を製造する工程を示す。ガラス繊維巻回体２から引き出されたガラスストランド２ａを３本のテンションバー７に通す。ガラスストランド２ａは、テンションバー７上でテンションをかけられて広がる。そして、３本のテンションバー７に通されて広がったガラスストランド２ａは、含浸装置８内で溶解された熱可塑性樹脂８ａに通され、熱可塑性樹脂８ａを含浸させられる。熱可塑性樹脂８ａを含浸させられたガラスストランド２ａは、冷却され、切断ロール９で連続的に切断され、長繊維ペレット６が形成される。 The spread width and the running fluff amount will be described with reference to FIG. FIG. 3 shows a process of manufacturing the long fiber pellet 6 from the glass fiber wound body 2. The glass strand 2 a drawn out from the glass fiber wound body 2 is passed through the three tension bars 7. The glass strand 2a is spread on the tension bar 7 under tension. Then, the glass strands 2a spread through the three tension bars 7 are passed through the thermoplastic resin 8a dissolved in the impregnation device 8 and impregnated with the thermoplastic resin 8a. The glass strand 2a impregnated with the thermoplastic resin 8a is cooled and continuously cut by the cutting roll 9, and the long fiber pellet 6 is formed.
開繊幅とは、テンションバー７上でテンションをかけられて広がったガラスストランド２ａの幅である。走行毛羽量とは、１本のガラスストランド２ａを３００ｍ／分の速度でテンションバー７上を５分間連続走行させた後における３本のテンションバー７に付着及びテンションバー７下に堆積しているガラスストランド２ａから脱落したガラスフィラメントの合計質量である。 The spread width is the width of the glass strand 2a spread on the tension bar 7 under tension. The amount of running fluff is adhered to and deposited on the three tension bars 7 after the glass strand 2a is continuously run on the tension bar 7 for 5 minutes at a speed of 300 m / min. It is the total mass of the glass filaments that have fallen off the glass strand 2a.
開繊幅が大きく、走行毛羽量が少ない程、作業性に優れていることを示す。開繊幅が大きい程、含浸装置８で熱可塑性樹脂を含浸し易くなる。また、走行毛羽量が少ない程、無駄が少ないことになる。集束剤の被膜化の程度が、強ければ強い程、走行毛羽量が少なくなる一方、開繊幅が小さくなる傾向がある。 The larger the spread width and the smaller the amount of running fluff, the better the workability. The larger the spread width, the easier the impregnation apparatus 8 impregnates the thermoplastic resin. Further, the smaller the amount of running fluff, the less waste. The stronger the sizing agent is coated, the smaller the amount of running fluff and the smaller the spread width.
評価対象のガラス繊維巻回体２は、次のように作製した。まずＥガラスのガラス組成となるように調合した各種ガラス原料をガラス熔融炉中で熔解し、均質な状態にした。次いで、この熔融ガラスをガラス熔融炉の成形域に備えられたブッシングへと導いて、耐熱性ノズルから引き出し、ガラスフィラメントの直径が１７μｍとなるように冷却条件、巻き取り条件等を調整した状態で成形した。引き出されたガラスフィラメントを、このように直径を整えた状態で冷却し、次いで予め準備した各種のガラス繊維集束剤を集束剤塗布装置であるアプリケータローラによって均等に塗布した。 The glass fiber wound body 2 to be evaluated was produced as follows. First, various glass raw materials prepared so as to have a glass composition of E glass were melted in a glass melting furnace to obtain a homogeneous state. Next, the molten glass is led to a bushing provided in a molding region of a glass melting furnace, pulled out from a heat-resistant nozzle, and in a state in which cooling conditions and winding conditions are adjusted so that the diameter of the glass filament becomes 17 μm. Molded. The drawn glass filament was cooled in such a state that the diameter was adjusted, and then various kinds of glass fiber sizing agents prepared in advance were applied evenly by an applicator roller as a sizing agent application device.
このようにガラスフィラメント表面にガラス繊維用集束剤が塗布されたガラスフィラメントを集束器（ギャザリングシューとも呼ぶ）によって４０００本を束ねて１本のガラスストランド２ａとし、さらに紙管に巻き取ってガラス繊維巻回体２とした。このガラスストランド２ａの直径は、約５ｍｍであった。 In this way, 4000 pieces of glass filaments having a glass fiber sizing agent coated on the surface thereof are bundled together by a bundling device (also called a gathering shoe) to form one glass strand 2a, which is further wound around a paper tube to obtain glass fibers. A wound body 2 was obtained. The glass strand 2a had a diameter of about 5 mm.
ガラス繊維巻回体２に塗布されたガラス繊維集束剤の成分は、アミノシラン０．５ｗｔ％、エーテル系ウレタン１０ｗｔ％、潤滑剤０．５ｗｔ％であった。 The components of the glass fiber sizing agent applied to the glass fiber roll 2 were aminosilane 0.5 wt%, ether urethane 10 wt%, and lubricant 0.5 wt%.
このように作製したガラス繊維巻回体２を、次に挙げる乾燥条件で乾燥させた。なお、乾燥後のガラス繊維巻回体２全体の重量に対する乾燥後のガラス繊維集束剤の量（ガラス繊維巻回体へのガラス繊維集束剤の付着量）は、０．５ｗｔ％であった。 The glass fiber wound body 2 produced in this way was dried under the following drying conditions. The amount of the glass fiber sizing agent after drying with respect to the weight of the entire glass fiber wound body 2 after drying (the amount of the glass fiber sizing agent attached to the glass fiber wound body) was 0.5 wt%.
実施例：誘電加熱器で８時間乾燥させて水分率を０．１％以下にさせたのち、熱風加熱により１２０℃で２時間保持した。
比較例１：誘電加熱器で８時間乾燥させて水分率を０．１％以下にさせた。
比較例２：熱風加熱により１２０℃で１２時間保持した。
Example: After drying with a dielectric heater for 8 hours to reduce the moisture content to 0.1% or less, it was kept at 120 ° C. for 2 hours by heating with hot air.
Comparative Example 1: The moisture content was reduced to 0.1% or less by drying with a dielectric heater for 8 hours.
Comparative Example 2: It was held at 120 ° C. for 12 hours by hot air heating.
乾燥後のガラス繊維巻回体２について、走行毛羽量と開繊幅を計測した。この結果を表１に示す。 About the glass fiber wound body 2 after drying, the amount of running fluff and the spread width were measured. The results are shown in Table 1.
表１から、実施例が、比較例１と比較例２との間の開繊幅及び走行毛羽量であることが分かる。つまり、本発明の実施例では、開繊幅及び走行毛羽量の両方について、バランス良く得ることができる。すなわち、本発明の実施例では、集束剤が適度に被膜化されたと言える。 From Table 1, it can be seen that the example is the spread width and the running fluff amount between Comparative Example 1 and Comparative Example 2. That is, in the Example of this invention, it can obtain with good balance about both the spread width and the amount of running fluff. That is, in the examples of the present invention, it can be said that the sizing agent was appropriately coated.
本発明は、上記実施形態に限定されず、その技術的思想の範囲内で、様々な変形が可能である。例えば、上記実施形態では、ガラス繊維巻回体２は、直接巻き取り法によって製造されるものであったが、溶融ガラスを一旦ケーキに巻き取り、乾燥後に複数のケーキを引き揃え、再度円筒状に巻き取る場合のケーキであってもよい。 The present invention is not limited to the above embodiment, and various modifications are possible within the scope of the technical idea. For example, in the said embodiment, although the glass fiber winding body 2 was manufactured by the direct winding method, a molten glass is once wound up to a cake, and after drying several cakes, it is cylindrical again It may be a cake in the case of winding.
１ ガラス繊維巻回体の乾燥装置
２ ガラス繊維巻回体
３ 第１乾燥手段
４ 第２乾燥手段
DESCRIPTION OF SYMBOLS 1 Drying apparatus of glass fiber winding body 2 Glass fiber winding body 3 1st drying means 4 2nd drying means
Claims (6)
前記ガラス繊維巻回体を誘電加熱で乾燥させる第１乾燥工程と、前記第１乾燥工程で乾燥された前記ガラス繊維巻回体を雰囲気加熱で乾燥させる第２乾燥工程とを備えたことを特徴とするガラス繊維巻回体の乾燥方法。 A drying method for drying a glass fiber wound body formed by winding glass fiber coated with a moisture-containing sizing agent,
A first drying step for drying the glass fiber wound body by dielectric heating, and a second drying step for drying the glass fiber wound body dried by the first drying step by atmospheric heating. A method for drying a glass fiber wound body.
前記集束剤として、ウレタン系、エポキシ系、酢酸ビニル系の何れか１つを使用することを特徴とする請求項１〜４の何れか１項に記載のガラス繊維巻回体の乾燥方法。 Glass composition of the glass fiber,% by mass on the oxide basis, SiO 2 52~62%, Al 2 O 3 10~16%, B 2 O 3 0~8%, 0~5% MgO, CaO 16~ 25% and R 2 O (where R is at least one of Li, Na and K) 0-2%;
The method for drying a glass fiber wound body according to any one of claims 1 to 4, wherein any one of urethane, epoxy, and vinyl acetate is used as the sizing agent.
前記ガラス繊維巻回体を誘電加熱で乾燥させる第１乾燥手段と、前記第１乾燥手段で乾燥された前記ガラス繊維巻回体を雰囲気加熱で乾燥させる第２乾燥手段とを備えたことを特徴とするガラス繊維巻回体の乾燥装置。 A drying apparatus for drying a glass fiber wound body formed by winding glass fiber coated with a moisture-containing sizing agent,
A first drying means for drying the glass fiber wound body by dielectric heating, and a second drying means for drying the glass fiber wound body dried by the first drying means by atmospheric heating. A glass fiber wound body drying apparatus.
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