JPH05293823A - Bmc formed body - Google Patents

Bmc formed body

Info

Publication number
JPH05293823A
JPH05293823A JP12807792A JP12807792A JPH05293823A JP H05293823 A JPH05293823 A JP H05293823A JP 12807792 A JP12807792 A JP 12807792A JP 12807792 A JP12807792 A JP 12807792A JP H05293823 A JPH05293823 A JP H05293823A
Authority
JP
Japan
Prior art keywords
glass
bmc
chopped strand
filaments
formed body
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.)
Pending
Application number
JP12807792A
Other languages
Japanese (ja)
Inventor
Isao Taguchi
功 田口
Toshiaki Takagi
俊明 高木
Masayuki Arioka
雅行 有岡
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Nippon Electric Glass Co Ltd
Original Assignee
Nippon Electric Glass Co Ltd
Priority date (The priority date 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 date listed.)
Filing date
Publication date
Application filed by Nippon Electric Glass Co Ltd filed Critical Nippon Electric Glass Co Ltd
Priority to JP12807792A priority Critical patent/JPH05293823A/en
Publication of JPH05293823A publication Critical patent/JPH05293823A/en
Pending legal-status Critical Current

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Abstract

PURPOSE:To obtain a high strength BMC formed body while the excellent characteristics of BMC forming method is held by a method wherein the ratio of the number of glass filaments of unsplit chopped strand to the total number of glass filaments of a BMC formed body. reinforced with the glass chopped strand is made to be large than the specified value. CONSTITUTION:The ratio of the number of glass filaments consisting of unsplit glass chopped strand to the total number of glass filaments in a BMC formed body. Thus, glass fiber has the average length of fiber of 700mum, resulting in obtaining a high strength formed body. The unsplit chopped strand is prepared by bonding 10 or more filaments to one another. In order to enhance the adhesion between resin and the filament under few split state, binder, the solubility in styrene of which is 40% or less and the impregnating time of unsaturated polyester resin in which is 10min or less, is preferable used as the binder to be applied to the glass filament.

Description

【発明の詳細な説明】Detailed Description of the Invention

【0001】[0001]

【産業上の利用分野】本発明は、表面に集束剤が塗布さ
れたガラスフィラメント群を集束してガラスストランド
として後、切断することによって得られるガラスチョッ
プドストランドが強化材として用いられてなるBMC
(バルク・モールディング・コンパウンド)成形体に関
するものである。
BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a BMC in which glass chopped strands obtained by bundling a group of glass filaments coated with a sizing agent on the surface thereof and then cutting the glass filaments are used as a reinforcing material.
(Bulk molding compound) The present invention relates to a molded product.

【0002】[0002]

【従来の技術】一般にガラス繊維を製造する場合、溶融
ガラスをブッシング底部に形成された多数のノズルから
ガラスフィラメント群として引き出し、これらのガラス
フィラメントの表面に集束剤を塗布して集束することに
よってガラスストランドとする方法が採られ、さらにこ
のガラスストランドを1.5〜25mmの長さに切断す
ることによってガラスチョップドストランドが作製され
る。
2. Description of the Related Art Generally, when manufacturing glass fibers, molten glass is drawn out from a large number of nozzles formed at the bottom of a bushing as a group of glass filaments, and the surface of these glass filaments is coated with a sizing agent to focus the glass. A method of forming a strand is adopted, and further, this glass strand is cut into a length of 1.5 to 25 mm to produce a glass chopped strand.

【0003】熱硬化性不飽和ポリエステル樹脂の成形法
のひとつであるBMC成形法は、このようなガラスチョ
ップドストランドと、不飽和ポリエステル樹脂、低収縮
剤、充填剤等からなるコンパウンドとを混練、熟成した
後、射出成形や圧縮成形によって成形する方法である。
The BMC molding method, which is one of the methods for molding a thermosetting unsaturated polyester resin, mixes and ages such glass chopped strands with a compound composed of an unsaturated polyester resin, a low-shrinking agent, a filler and the like. After that, it is a method of molding by injection molding or compression molding.

【0004】[0004]

【発明が解決しようとする課題】このBMC成形法によ
って作製される成形体は、耐熱性、寸法安定性、表面平
滑性に優れているが、高い強度が得られないという欠点
があり、高強度が要求される用途には不向きとされてい
る。
The molded article produced by this BMC molding method is excellent in heat resistance, dimensional stability, and surface smoothness, but has the drawback that high strength cannot be obtained. Is not suitable for applications that require.

【0005】本発明の目的は、BMC成形法によって作
製される成形体の優れた特性を保持したまま、高い強度
を有するBMC成形体を提供することである。
An object of the present invention is to provide a BMC molded product having high strength while maintaining the excellent properties of the molded product produced by the BMC molding method.

【0006】[0006]

【課題を解決するための手段】本発明者等は、上記目的
を達成すべく、種々の研究を重ねた結果、BMC成形法
によって作製した成形体が高い強度を有さない理由は、
強化材として用いられるガラスチョップドストランドが
コンパウンドと混練される工程や、その後の射出成形工
程あるいは圧縮成形工程において、全てのガラスチョッ
プドストランドがガラスフィラメント(モノフィラメン
ト)に解繊し、残存体積平均ガラス繊維長(以下、平均
繊維長という)が500μm以下の長さにまで短く切断
破壊され、強化材としてほとんど作用しなくなるためで
あることを見いだし、本発明を提案するに至った。
Means for Solving the Problems As a result of various studies conducted by the present inventors in order to achieve the above object, the reason why a molded body produced by the BMC molding method does not have high strength is as follows.
All glass chopped strands are defibrated into glass filaments (monofilaments) in the process in which the glass chopped strands used as a reinforcing material are kneaded with the compound, and the subsequent injection molding process or compression molding process, and the residual volume average glass fiber length It has been found that (hereinafter, referred to as average fiber length) is cut and broken to a length of 500 μm or less and hardly acts as a reinforcing material, and the present invention has been proposed.

【0007】すなわち本発明のBMC成形体は、表面に
集束剤が塗布されたガラスフィラメント群を集束してガ
ラスストランドとした後、切断することによって得られ
るガラスチョップドストランドが強化材として用いられ
てなるBMC成形体において、ガラスフィラメントの全
本数に対し、未解繊ガラスチョップドストランドを構成
するガラスフィラメントの本数が0.1%以上であるこ
とを特徴とする。
That is, the BMC molded product of the present invention comprises glass chopped strands obtained by bundling a group of glass filaments coated with a sizing agent on the surface thereof and then cutting the glass filaments as a reinforcing material. In the BMC molded body, the number of glass filaments constituting the undefibrated glass chopped strand is 0.1% or more with respect to the total number of glass filaments.

【0008】また本発明においては、集束剤のスチレン
溶解度が40%以下であり、且つ、不飽和ポリエステル
樹脂の含浸時間が10分以内であることを特徴とする。
Further, in the present invention, the styrene solubility of the sizing agent is 40% or less, and the impregnation time of the unsaturated polyester resin is within 10 minutes.

【0009】[0009]

【作用】本発明のBMC成形体は、ガラスフィラメント
の全本数に対し、未解繊ガラスチョップドストランドを
構成するガラスフィラメントの本数が0.1%以上残存
するため、この未解繊ガラスチョップドストランドは切
断されにくく、切断されても700μm以上の平均繊維
長を有している。
In the BMC molded product of the present invention, since the number of glass filaments constituting the undisentangled glass chopped strands is 0.1% or more with respect to the total number of glass filaments, the undisentangled glass chopped strands are It is difficult to cut, and even if cut, it has an average fiber length of 700 μm or more.

【0010】本発明において、ガラスフィラメントの全
本数に対し、未解繊ガラスチョップドストランドを構成
するガラスフィラメントの本数が0.1%以上であれ
ば、高い強度の成形体が得られるが、より顕著な作用効
果を得るためには、この値が0.5%以上であることが
望ましい。ここで未解繊ガラスチョップドストランドと
は、10本以上のガラスフィラメントが接着してなるガ
ラスチョップドストランドのことである。
In the present invention, when the number of glass filaments constituting the undisentangled glass chopped strand is 0.1% or more based on the total number of glass filaments, a molded product having high strength can be obtained, but it is more remarkable. In order to obtain various effects, it is desirable that this value be 0.5% or more. Here, the undisentangled glass chopped strand is a glass chopped strand formed by adhering 10 or more glass filaments.

【0011】ガラスチョップドストランドの解繊は、ガ
ラス繊維の表面に塗布される集束剤のスチレン溶解度が
低い程、少なくなり、また集束剤に対する不飽和ポリエ
ステル樹脂の含浸時間が遅い程、ガラスチョップドスト
ランドと樹脂との接着性が悪くなり、十分な補強効果が
得られ難くなるため、スチレン溶解度が40%以下で、
且つ、不飽和ポリエステル樹脂の含浸時間が10分以内
の集束剤を用いることが好ましい。
The defibration of the glass chopped strands decreases as the styrene solubility of the sizing agent applied to the surface of the glass fibers decreases and the impregnation time of the unsaturated polyester resin into the sizing agent decreases, resulting in the formation of glass chopped strands. If the styrene solubility is 40% or less, the adhesiveness with the resin deteriorates and it becomes difficult to obtain a sufficient reinforcing effect.
Moreover, it is preferable to use a sizing agent having an unsaturated polyester resin impregnation time of 10 minutes or less.

【0012】[0012]

【実施例】以下、本発明のBMC成形体を実施例及び比
較例に基づいて詳細に説明する。
EXAMPLES Hereinafter, the BMC molded article of the present invention will be described in detail based on Examples and Comparative Examples.

【0013】(実施例1)まずポリウレタンエマルジョ
ン5.0重量%、アクリルシラン0.3重量%、第4級
アンモニウム塩0.1重量%を含有し、スチレン溶解度
が30%であり、不飽和ポリエステル樹脂の含浸時間が
7分である集束剤を準備した。
Example 1 First, 5.0% by weight of polyurethane emulsion, 0.3% by weight of acrylic silane and 0.1% by weight of quaternary ammonium salt were contained, and the solubility of styrene was 30%. A sizing agent having a resin impregnation time of 7 minutes was prepared.

【0014】この集束剤を2000本のガラスフィラメ
ントの表面に塗布、集束してガラスストランドを得た
後、6mmの長さに切断することによってガラスチョッ
プドストランドを作製した。
This sizing agent was applied to the surface of 2000 glass filaments, and then bundled to obtain glass strands, which were then cut to a length of 6 mm to prepare glass chopped strands.

【0015】その後、このガラスチョップドストランド
20重量%と、表1に示すコンパウンド80重量%とを
混練、熟成し、射出成形法によって所定の形状に成形す
ることによってBMC成形体を得た。
Thereafter, 20% by weight of this glass chopped strand and 80% by weight of the compound shown in Table 1 were kneaded, aged and molded into a predetermined shape by injection molding to obtain a BMC molded body.

【0016】[0016]

【表1】 [Table 1]

【0017】こうして作製したBMC成形体を切断し、
その断面を走査電子顕微鏡(以下、SEMという)によ
って写真撮影し、ガラスフィラメントの全本数に対する
未解繊ガラスチョップドストランドを構成するガラスフ
ィラメントの本数を調べたところ、0.5%であった。
The BMC molded body thus produced is cut,
The cross-section was photographed with a scanning electron microscope (hereinafter referred to as SEM), and the number of glass filaments constituting the undisentangled glass chopped strand with respect to the total number of glass filaments was examined and found to be 0.5%.

【0018】またこのBMC成形体を640℃で焼却
し、塩酸により炭酸カルシウムを溶解した後、濾過、乾
燥し、残ったガラスフィラメントを写真撮影して、その
平均繊維長を測定したところ、約700μmであった。
Further, this BMC molded body was incinerated at 640 ° C., after dissolving calcium carbonate with hydrochloric acid, it was filtered and dried, and the remaining glass filament was photographed and its average fiber length was measured to be about 700 μm. Met.

【0019】さらにこの成形体のシャルピー衝撃強度を
測定したところ、8.0kgf・cm/cm2 と高く、
さらに衝撃強度試験によって破断した面をSEMによっ
て観察したところ、ガラス繊維と樹脂が良好に接着して
いることが確認できた。
Further, when the Charpy impact strength of this molded article was measured, it was as high as 8.0 kgf · cm / cm 2 ,
Further, when the surface ruptured by the impact strength test was observed by SEM, it was confirmed that the glass fiber and the resin were well bonded.

【0020】(実施例2)ポリウレタンエマルジョン1
0.0重量%、アクリルシラン0.3重量%、第4級ア
ンモニウム塩0.1重量%を含有し、スチレン溶解度が
30%、不飽和ポリエステル樹脂の含浸時間が8分の集
束剤を準備し、実施例1と同様の方法でBMC成形体を
得た。
(Example 2) Polyurethane emulsion 1
Prepare a sizing agent containing 0.0% by weight, 0.3% by weight of acrylic silane and 0.1% by weight of quaternary ammonium salt, having a styrene solubility of 30% and an unsaturated polyester resin impregnation time of 8 minutes. A BMC molded body was obtained in the same manner as in Example 1.

【0021】こうして作製したBMC成形体を実施例1
と同様にしてガラスフィラメントの全本数に対する未解
繊ガラスチョップドストランドを構成するガラスフィラ
メントの本数を調べたところ、0.7%であり、また平
均繊維長は、約730μmであった。
The BMC molded body thus produced was used in Example 1.
When the number of glass filaments constituting the undisentangled glass chopped strand was examined with respect to the total number of glass filaments in the same manner as in, the result was 0.7%, and the average fiber length was about 730 μm.

【0022】さらにこの成形体のシャルピー衝撃強度と
樹脂との接着性を実施例1と同様に調べたところ、衝撃
強度は、8.1kgf・cm/cm2 であり、またガラ
ス繊維と樹脂が良好に接着していることが確認できた。
Further, when the Charpy impact strength of this molded article and the adhesiveness with the resin were examined in the same manner as in Example 1, the impact strength was 8.1 kgf · cm / cm 2 , and the glass fiber and the resin were good. It was confirmed that it was adhered to.

【0023】(比較例1)ポリウレタンエマルジョン1
0.0重量%、アクリルシラン0.3重量%、第4級ア
ンモニウム塩0.1重量%を含有し、スチレン溶解度が
50%、不飽和ポリエステル樹脂の含浸時間が8分であ
る集束剤を準備し、実施例と同じ方法でBMC成形体を
得た。
Comparative Example 1 Polyurethane Emulsion 1
Prepare a sizing agent containing 0.0% by weight, 0.3% by weight of acrylic silane, and 0.1% by weight of quaternary ammonium salt, having a styrene solubility of 50% and an unsaturated polyester resin impregnation time of 8 minutes. Then, a BMC molded body was obtained by the same method as in the example.

【0024】こうして作製したBMC成形体を実施例1
と同様にしてガラスフィラメントの全本数に対する未解
繊ガラスチョップドストランドを構成するガラスフィラ
メントの本数を調べたところ、0%であり、また平均繊
維長は、約500μmであった。
The BMC compact thus produced was used in Example 1.
When the number of glass filaments constituting the undisentangled glass chopped strand was checked with respect to the total number of glass filaments in the same manner as in, the result was 0%, and the average fiber length was about 500 μm.

【0025】さらにこの成形体のシャルピー衝撃強度と
樹脂との接着性を調べたところ、ガラス繊維と樹脂が良
好に接着していることが確認できたが、衝撃強度が7.
1kgf・cm/cm2 と実施例に比べて低かった。
Further, when the Charpy impact strength of this molded article and the adhesiveness with the resin were examined, it was confirmed that the glass fiber and the resin were well adhered, but the impact strength was 7.
The value was 1 kgf · cm / cm 2 , which was lower than that of the example.

【0026】尚、集束剤のスチレン溶解度の測定は、ま
ず20gのガラスチョップドストランドをビーカーに入
れ、このビーカーにスチレンモノマー300ccを注
ぎ、30分保持した。次いで、ガラスチョップドストラ
ンドを絞り、風乾した後、その強熱減量(C1 %)を測
定し、予め測定しておいた強熱減量(C0 %)の値を用
いて、
The styrene solubility of the sizing agent was measured by first placing 20 g of glass chopped strands in a beaker and pouring 300 cc of styrene monomer into the beaker and holding for 30 minutes. Then, after squeezing the glass chopped strand and air-drying, the ignition loss (C 1 %) thereof is measured, and the value of the ignition loss (C 0 %) measured in advance is used,

【0027】[0027]

【数1】 [Equation 1]

【0028】の式により算出した。It was calculated by the following equation.

【0029】また集束剤の不飽和ポリエステル樹脂の含
浸時間は、20gのガラスチョップドストランドをビー
カーに入れ、次いでこのビーカーに不飽和ポリエステル
樹脂200gを注ぎ、ガラスチョップドストランドが透
明になるのを目視で観察できるまでに要した時間を計っ
たものである。
Further, the impregnation time of the unsaturated polyester resin as the sizing agent was determined by placing 20 g of glass chopped strands in a beaker and then pouring 200 g of the unsaturated polyester resin into the beaker and visually observing that the glass chopped strands became transparent. It is a measure of the time required to complete it.

【0030】さらにシャルピー衝撃強度は、JISK7
111の方法によって測定したものである。
Further, the Charpy impact strength is JISK7
It is measured by the method of 111.

【0031】[0031]

【発明の効果】以上のように本発明のBMC成形体は、
BMC成形法によって作製される成形体の有する優れた
特性を保持したまま、高い強度を有しているため、高強
度が要求される各種の用途に使用することが可能であ
る。
As described above, the BMC molded body of the present invention is
Since the molded product produced by the BMC molding method has high strength while maintaining excellent properties, it can be used for various applications requiring high strength.

Claims (2)

【特許請求の範囲】[Claims] 【請求項1】 表面に集束剤が塗布されたガラスフィラ
メント群を集束してガラスストランドとした後、切断す
ることによって得られるガラスチョップドストランドが
強化材として用いられてなるBMC成形体において、ガ
ラスフィラメントの全本数に対し、未解繊ガラスチョッ
プドストランドを構成するガラスフィラメントの本数が
0.1%以上であることを特徴とするBMC成形体。
1. A BMC molded product comprising a glass chopped strand obtained by bundling a glass filament group having a sizing agent applied to the surface thereof to form a glass strand, and then cutting the glass filament, as a reinforcing material. The number of glass filaments constituting the undisentangled glass chopped strand is 0.1% or more with respect to the total number of the above.
【請求項2】 集束剤のスチレン溶解度が40%以下で
あり、且つ、不飽和ポリエステル樹脂の含浸時間が10
分以内であることを特徴とする請求項1のBMC成形
体。
2. The styrene solubility of the sizing agent is 40% or less, and the impregnation time of the unsaturated polyester resin is 10%.
The BMC molded product according to claim 1, which is within a minute.
JP12807792A 1992-04-21 1992-04-21 Bmc formed body Pending JPH05293823A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP12807792A JPH05293823A (en) 1992-04-21 1992-04-21 Bmc formed body

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP12807792A JPH05293823A (en) 1992-04-21 1992-04-21 Bmc formed body

Publications (1)

Publication Number Publication Date
JPH05293823A true JPH05293823A (en) 1993-11-09

Family

ID=14975863

Family Applications (1)

Application Number Title Priority Date Filing Date
JP12807792A Pending JPH05293823A (en) 1992-04-21 1992-04-21 Bmc formed body

Country Status (1)

Country Link
JP (1) JPH05293823A (en)

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US6278504B1 (en) 1996-01-25 2001-08-21 Lg. Philips Lcd Co., Ltd. Thin film transistor for liquid crystal display device having a semiconductor layer's width smaller than a width of the gate, drain and source electrodes
FR2831160A1 (en) 2001-10-23 2003-04-25 Asahi Fiber Class Company Ltd Chopped glass fibres for polyester resin-fibre composite moldings, especially reflecting mirrors for car head lamps, impregnated with a sizing agent containing a urethane resin, a vinyl acetate resin and a coupling agent
JP2006199972A (en) * 2001-10-23 2006-08-03 Fiber Glass Japan Co Ltd Chopped strands and molded product of unsaturated polyester resin bmc employing them

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US6278504B1 (en) 1996-01-25 2001-08-21 Lg. Philips Lcd Co., Ltd. Thin film transistor for liquid crystal display device having a semiconductor layer's width smaller than a width of the gate, drain and source electrodes
FR2831160A1 (en) 2001-10-23 2003-04-25 Asahi Fiber Class Company Ltd Chopped glass fibres for polyester resin-fibre composite moldings, especially reflecting mirrors for car head lamps, impregnated with a sizing agent containing a urethane resin, a vinyl acetate resin and a coupling agent
US6787226B2 (en) 2001-10-23 2004-09-07 Asahi Fiber Glass Company Limited Chopped strands and molded product of unsaturated polyester resin BMC employing them
JP2006199972A (en) * 2001-10-23 2006-08-03 Fiber Glass Japan Co Ltd Chopped strands and molded product of unsaturated polyester resin bmc employing them

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