JPH0426285B2 - - Google Patents

Info

Publication number
JPH0426285B2
JPH0426285B2 JP61246117A JP24611786A JPH0426285B2 JP H0426285 B2 JPH0426285 B2 JP H0426285B2 JP 61246117 A JP61246117 A JP 61246117A JP 24611786 A JP24611786 A JP 24611786A JP H0426285 B2 JPH0426285 B2 JP H0426285B2
Authority
JP
Japan
Prior art keywords
laminate
temperature
strip
shaped
strips
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.)
Expired - Lifetime
Application number
JP61246117A
Other languages
Japanese (ja)
Other versions
JPS6398433A (en
Inventor
Yasuo Azumabayashi
Keiji Haga
Keiji Myamoto
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.)
Panasonic Electric Works Co Ltd
Original Assignee
Matsushita Electric Works 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 Matsushita Electric Works Ltd filed Critical Matsushita Electric Works Ltd
Priority to JP61246117A priority Critical patent/JPS6398433A/en
Publication of JPS6398433A publication Critical patent/JPS6398433A/en
Publication of JPH0426285B2 publication Critical patent/JPH0426285B2/ja
Granted legal-status Critical Current

Links

Landscapes

  • Laminated Bodies (AREA)
  • Casting Or Compression Moulding Of Plastics Or The Like (AREA)
  • Moulding By Coating Moulds (AREA)

Description

【発明の詳細な説明】[Detailed description of the invention]

〔技術分野〕 この発明は、ダブルベルトプレス等を用いる積
層板の製法に関する。 〔背景技術〕 積層板を能率良く得る方法として、連続工法が
ある。この連続工法にも種々の方法があるが、そ
の一つに成形工程を上下一対の熱盤、たとえば、
スチールベルトを用いて行う方法がある。 従来、この方法は、帯状のプリプレグや帯状の
銅箔等を含む複数枚の帯状材料を同温度に設定さ
れた上下一対のスチールベルト(熱盤)感に連続
的に送り込み、その上下一対のスチールベルト間
で連続的に積層成形する工程を経て、積層板を得
るようにするものであつた。 ところが、この方法によれば、硬化前、一旦、
樹脂が溶融状態になるため、重力によつて、重ね
合わされた複数枚の帯状材料の下側で樹脂リツチ
となり、硬化収縮で反りが発生して、得られる積
層板が凸状の積層板になつてしまつていた。 そこで、このような欠点を解消しようとして、
上側の帯状材料のテンシヨンを強くするとか、帯
状のプリプレグが複数枚用いられているときに
は、下側のプリプレグの樹脂コンテントを少なく
する等の手法が試みられているが、テンシヨンを
強くすることにより得られる積層板の寸法変化率
が大きくなつたり、樹脂コンテントを少なくする
ことによりプリプレグの互換性がなくなつたりす
ると言う欠点があつた。 〔発明の目的〕 以上の事情に鑑みて、この発明は、得られる積
層板の寸法変化率が大きくなつたり、プリプレグ
の互換性がなくなつたりすることがなく、反りが
極めて小さい積層板を得ることができる積層板の
製法を提供することを目的とする。 〔発明の開示〕 前記目的を達成するため、発明者らは、種々実
験研究を重ねた結果、上下一対の熱盤の温度に差
をもたせ、上側の熱盤の温度を下側の熱盤の温度
より5℃以上高くすることにより、反りが極めて
小さい積層板が得られると言うことを見出し、こ
の発明を完成した。 すなわち、この発明は、帯状のプリプレグ1枚
以上を含む複数枚の帯状材料を上下一対の熱盤間
で連続的に積層成形する工程を含む積層板の製法
において、上側の熱盤の温度が下側の熱盤の温度
より5℃以上高くされていることを特徴とする積
層板の製法をその要旨としている。 以下に、この発明を、その一実施例をあらわす
図面を参照しながら詳しく説明する。 第1図は、この発明にかかる積層板の製法の一
実施例をあらわしている。図にみるように、3枚
の帯状のプリプレグ1の両側に帯状の金属箔2が
それぞれ配置されるようにして、これら複数枚の
帯状材料を連続的にダブルベルトプレス3に送り
込む。ダブルベルトプレス3は、僅かな間隔を置
いて上下に配置された一対のスチールベルト3
0,31を備えている。スチールベルト30,3
1は、それぞれ離間した2個のロール32,33
に巻き掛けられていて、ロールの回転により、間
に送り込まれた複数枚の帯状材料を図中、矢印A
方向に送り出すように走行している。スチールベ
ルト30,31は、熱盤となつていて、これらの
温度は、上側のスチールベルト30の温度T1
下側のスチールベルト31の温度T2より5℃以
上高くされている。たとえば、上側のスチールベ
ルトの温度T1が185℃とされ、下側のスチールベ
ルトの温度T2が175℃とされている。ダブルベル
トプレス3に送り込まれた、すなわち、ダブルベ
ルトプレスの上下一対のスチールベルト30,3
1間に送り込まれた帯状のプリプレグ1および帯
状の金属箔2等の複数枚の帯状材料は、連続的に
スチールベルト30,31間で加熱されるととも
に20Kg/cm2程度の圧力で加圧されることにより積
層成形されて、帯状の積層体4となる。このよう
にして得られた帯状の積層体4を、この後、アフ
タキユア炉に通し、アフターキユアしてから、カ
ツタ6等で所望の大きさに切断するようにして積
層板7を得るようにする。 以上にみるように、この積層板の製法は、上下
一対のスチールベルト30,31間で複数枚の帯
状材料を積層成形する際に、上側のスチールベル
ト30の温度T1が下側のスチールベルト31の
温度T2より5℃以上高くされている。そのため、
反りが極めて小さな積層板を得ることができるの
である。しかも、この製法は、従来の製法のよう
に、テンシヨンを強くしたり、樹脂コンテントを
少なくしたりすることがないため、得られる積層
板の寸法変化率が大きくなつたり、プリプレグの
互換性がなくなつたりするような欠点がないもの
である。 この発明に用いられる複数枚の帯状材料は、全
てが帯状のプリプレグであつてもよく、帯状の銅
箔等の金属箔など、他の帯状材料を含んでいても
よい。要するに、複数枚の帯状材料に帯状のプリ
プレグを1枚以上含んでいればよい。熱盤は、前
記実施例のようにスチールベルトであつてもよい
し、平板状のものであつてもよい。成形圧力は、
低圧、高圧を問わない。 この発明において、上側の熱盤の温度は下側の
熱盤の温度より5℃以上高くされていることが必
要である。さらには、10℃以上とすることが効果
を向上させるうえで望ましい。 つぎに、実施例と比較例とを示す。 (実施例) 帯状のガラス布(日東紡績株式会社製WE18G、
203g/m2、厚み0.18mm)に下記に示す配合割合の
エポキシ樹脂ワニスを含浸させてレジンコンテン
ト40wt%の帯状のプリプレグをつくつた。この
帯状のプリプレグ3枚の両側にそれぞれ帯状の銅
箔(厚み18μm)を配し、これらを上下一対の熱
盤間で20Kg/cm2、3分間の条件で積層成形して、
帯状の積層体を得た。このときの上下の熱盤の温
度は、上側の熱盤の温度を185℃、下側の熱盤の
温度を175℃とした。得られた帯状の積層体を170
℃で30分間アフターキユアした後、切断して500
mm×500mmの大きさで厚み0.6mmの積層板を得た。 〔エポキシ樹脂ワニス〕 エピコート1001 100重量部 (シエル化学株式会社製) ジシアンジアミド 4重量部 ベンジルジメチルアミン 0.2重量部 エチルオキシトール 100重量部 (比較例) 上側の熱盤の温度を180℃、下側の熱盤の温度
を180℃とした以外は、前記実施例と同様にして
積層板を得た。 以上、得られた積層板について、それぞれ反り
の測定を行つた。反りの測定は、得られた状態で
の反り(成形後の反り)とエツチング後の反りと
170℃で1時間加熱した後の反りとについて行つ
た。その結果を第1表に示す。
[Technical Field] The present invention relates to a method for manufacturing a laminate using a double belt press or the like. [Background Art] As a method for efficiently obtaining laminates, there is a continuous construction method. There are various methods for this continuous construction method, but one of them is to perform the forming process using a pair of upper and lower heating plates, such as
There is a method using a steel belt. Conventionally, this method involves continuously feeding multiple strips of material, including strips of prepreg and strips of copper foil, through a pair of upper and lower steel belts (heating discs) set at the same temperature. A laminate plate was obtained through a process of continuous lamination forming between belts. However, according to this method, before curing,
Since the resin is in a molten state, gravity causes the resin to become rich on the underside of the multiple stacked strips, causing warping due to curing shrinkage, resulting in the resulting laminate becoming a convex laminate. It was closed. Therefore, in an attempt to eliminate these shortcomings,
Attempts have been made to increase the tension of the upper strip material, or to reduce the resin content of the lower prepreg when multiple prepreg strips are used, but there is no gain by increasing the tension. The disadvantages are that the dimensional change rate of the laminate becomes large and that the prepreg becomes incompatible by reducing the resin content. [Object of the Invention] In view of the above circumstances, the present invention provides a laminate with extremely small warpage without increasing the dimensional change rate of the obtained laminate or losing compatibility of prepregs. The purpose of the present invention is to provide a method for manufacturing a laminate that can [Disclosure of the Invention] In order to achieve the above object, the inventors have conducted various experiments and researches, and as a result, they created a temperature difference between a pair of upper and lower heating plates, and made the temperature of the upper heating plate higher than that of the lower heating plate. They discovered that a laminate with extremely small warpage could be obtained by increasing the temperature by 5°C or more, and completed this invention. That is, the present invention provides a laminate manufacturing method that includes a step of continuously laminating and forming a plurality of strips of material including one or more strips of prepreg between a pair of upper and lower heating plates, in which the temperature of the upper heating plate is lowered. The gist of this is a method for manufacturing a laminate, which is characterized in that the temperature is 5°C or more higher than the temperature of the side heating plate. Hereinafter, the present invention will be explained in detail with reference to the drawings showing one embodiment thereof. FIG. 1 shows an embodiment of the method for manufacturing a laminate according to the present invention. As shown in the figure, strip-shaped metal foils 2 are placed on both sides of three strip-shaped prepregs 1, and these strips of material are continuously fed into a double belt press 3. The double belt press 3 consists of a pair of steel belts 3 placed one above the other with a slight interval between them.
0.31. steel belt 30,3
1 is two rolls 32, 33 spaced apart from each other.
The arrow A in the figure indicates the multiple strips of material that are wound around the rollers and fed in between by the rotation of the rolls.
It runs as if sending it out in a certain direction. The steel belts 30 and 31 serve as hot discs, and their temperature is such that the temperature T 1 of the upper steel belt 30 is higher than the temperature T 2 of the lower steel belt 31 by 5° C. or more. For example, the temperature T 1 of the upper steel belt is 185°C, and the temperature T 2 of the lower steel belt is 175°C. A pair of upper and lower steel belts 30, 3 of the double belt press are fed into the double belt press 3.
A plurality of strip materials such as the prepreg strip 1 and the strip metal foil 2 fed between the steel belts 30 and 31 are continuously heated between the steel belts 30 and 31 and pressurized with a pressure of about 20 kg/cm 2 . By doing so, the laminate is formed into a strip-shaped laminate 4. The thus obtained strip-shaped laminate 4 is then passed through an after-cure furnace to be after-cured, and then cut into a desired size with a cutter 6 or the like to obtain a laminate 7. As described above, this method of manufacturing a laminate is such that when a plurality of strips of material are laminated between a pair of upper and lower steel belts 30 and 31, the temperature T 1 of the upper steel belt 30 is lower than that of the lower steel belt. The temperature is 5°C or more higher than the temperature T 2 of No. 31. Therefore,
This makes it possible to obtain a laminate with extremely small warpage. Moreover, unlike conventional manufacturing methods, this manufacturing method does not strengthen the tension or reduce the resin content, so the dimensional change rate of the resulting laminate increases and the prepregs become incompatible. It does not have any flaws that make it easy to get used to. The plurality of strip-shaped materials used in the present invention may all be strip-shaped prepregs, or may contain other strip-shaped materials such as strip-shaped metal foils such as copper foil. In short, it is sufficient if the plurality of strip-shaped materials include one or more strip-shaped prepregs. The heating plate may be a steel belt as in the above embodiment, or may be a flat plate. The molding pressure is
Doesn't matter whether it's low pressure or high pressure. In this invention, the temperature of the upper heating plate needs to be 5° C. or more higher than the temperature of the lower heating plate. Furthermore, in order to improve the effect, it is desirable to set the temperature to 10°C or higher. Next, examples and comparative examples will be shown. (Example) Band-shaped glass cloth (WE18G manufactured by Nittobo Co., Ltd.,
(203 g/m 2 , thickness 0.18 mm) was impregnated with epoxy resin varnish having the proportion shown below to prepare a strip-shaped prepreg with a resin content of 40 wt%. A strip of copper foil (thickness: 18 μm) was arranged on both sides of each of the three prepreg strips, and these were laminated and molded between a pair of upper and lower heating plates at a pressure of 20 kg/cm 2 for 3 minutes.
A strip-shaped laminate was obtained. At this time, the temperature of the upper and lower heating plates was 185°C, and the temperature of the lower heating plate was 175°C. The obtained strip-shaped laminate is 170
After cure for 30 minutes at ℃, cut and heat at 500℃.
A laminate with a size of mm x 500 mm and a thickness of 0.6 mm was obtained. [Epoxy resin varnish] Epicote 1001 100 parts by weight (manufactured by Ciel Chemical Co., Ltd.) Dicyandiamide 4 parts by weight Benzyldimethylamine 0.2 parts by weight Ethyloxytol 100 parts by weight (comparative example) A laminate was obtained in the same manner as in the previous example except that the temperature of the heating plate was 180°C. Warpage was measured for each of the laminates obtained above. Warpage measurement is based on warpage in the obtained state (warpage after molding) and warpage after etching.
Warpage after heating at 170°C for 1 hour was examined. The results are shown in Table 1.

〔発明の効果〕〔Effect of the invention〕

以上に説明してきたように、この発明にかかる
積層板の製法は、帯状のプリプレグ1枚以上を含
む複数枚の帯状材料を上下一対の熱盤間で連続的
に積層成形する工程を含む積層板の製法におい
て、上側の熱盤の温度が下側の熱盤の温度より5
℃以上高くされていることを特徴としているた
め、得られる積層板の寸法変化率が大きくなつた
り、プリプレグの互換性がなくなつたりすること
がなく、反りが極めて小さい積層板を得ることが
できる。
As explained above, the method for manufacturing a laminate according to the present invention includes the step of continuously laminating and forming a plurality of strip-shaped materials including one or more strip-shaped prepregs between a pair of upper and lower heating plates. In the manufacturing method, the temperature of the upper heating plate is 55% higher than the temperature of the lower heating plate.
℃ or more, the dimensional change rate of the resulting laminate will not increase or the prepreg will become incompatible, making it possible to obtain a laminate with extremely small warpage. .

【図面の簡単な説明】[Brief explanation of drawings]

第1図はこの発明にかかる積層板の製法の一実
施例をあらわす説明図、第2図は積層板の反りの
測定方法をあらわす説明図である。 1……帯状のプリプレグ、2……帯状の金属
箔、30,31……スチールベルト、7……積層
板。
FIG. 1 is an explanatory diagram showing an embodiment of the method for manufacturing a laminate according to the present invention, and FIG. 2 is an explanatory diagram showing a method for measuring warpage of a laminate. 1... Band-shaped prepreg, 2... Band-shaped metal foil, 30, 31... Steel belt, 7... Laminated plate.

Claims (1)

【特許請求の範囲】[Claims] 1 帯状のプリプレグ1枚以上を含む複数枚の帯
状材料を上下一対の熱盤間で連続的に積層成形す
る工程を含む積層板の製法において、上側の熱盤
の温度が下側の熱盤の温度より5℃以上高くされ
ていることを特徴とする積層板の製法。
1. In a laminate manufacturing method that includes the step of continuously laminating and forming a plurality of strips of material including one or more strips of prepreg between a pair of upper and lower heating plates, the temperature of the upper heating plate is higher than that of the lower heating plate. A method for manufacturing a laminate, characterized in that the temperature is 5°C or more higher than the temperature.
JP61246117A 1986-10-15 1986-10-15 Manufacture of laminated sheet Granted JPS6398433A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP61246117A JPS6398433A (en) 1986-10-15 1986-10-15 Manufacture of laminated sheet

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP61246117A JPS6398433A (en) 1986-10-15 1986-10-15 Manufacture of laminated sheet

Publications (2)

Publication Number Publication Date
JPS6398433A JPS6398433A (en) 1988-04-28
JPH0426285B2 true JPH0426285B2 (en) 1992-05-07

Family

ID=17143734

Family Applications (1)

Application Number Title Priority Date Filing Date
JP61246117A Granted JPS6398433A (en) 1986-10-15 1986-10-15 Manufacture of laminated sheet

Country Status (1)

Country Link
JP (1) JPS6398433A (en)

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPH066298B2 (en) * 1989-01-07 1994-01-26 大同鋼板株式会社 Heat insulation panel manufacturing method

Also Published As

Publication number Publication date
JPS6398433A (en) 1988-04-28

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