JPS597046A - Synthetic-resin laminated board enabling sharp cutting by laser beam - Google Patents

Abstract

(57)【要約】本公報は電子出願前の出願データであるた
め要約のデータは記録されません。(57) [Summary] This bulletin contains application data before electronic filing, so abstract data is not recorded.

Description

【発明の詳細な説明】 この発明はレーザ光線によってシャープな切断が可能な
合成樹脂積層板に関する。DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a synthetic resin laminate that can be cut sharply with a laser beam.

一般にレーザ光線によって合成樹脂積層板を切断するに
肖り、合成樹脂積層板が熱硬化性合成樹脂から形成され
たものであると、その厚味が２ｍｍ以下の場合はシャー
プな切断面を構成して容易に切断されるが、厚味が厚く
なるに従って合成樹脂は融解現象を起してシャープな切
断が困難となり切断面は凹凸状となり、又熱可塑性合成
樹脂から形成されたものであると、合成樹脂は融解流動
して切断面が凹凸状となる詐りか、切断長さが長ければ
長い程切断幅が拡大し、厚味方向においては、レーザ光
線の投射表面から裏面に行くに従って切断幅が拡大して
、垂直切断が難かしく、何れにしても厚味の厚い合成樹
脂積層板をレーザを用いて切断し、シャープな切断面を
形成せしめることは困難であった。　　　　　。Generally speaking, when cutting a synthetic resin laminate using a laser beam, if the synthetic resin laminate is made of thermosetting synthetic resin and its thickness is 2 mm or less, a sharp cut surface will be formed. However, as the thickness increases, the synthetic resin melts, making it difficult to cut sharply and the cut surface becomes uneven. Perhaps it is because the synthetic resin melts and flows and the cut surface becomes uneven, but the longer the cutting length, the wider the cutting width becomes. When enlarged, vertical cutting is difficult, and in any case, it is difficult to cut a thick synthetic resin laminate using a laser to form a sharp cut surface. .

この発明は厚味が厚くてもレーザ光線によりシャープな
切断が可能な合成樹脂積層板を得ることを目的としてな
されたものであって、種々検討の結果２１１１１ｔ＋以
下の厚味を有し、合成樹脂含有率が５〜３５重量％の熱
硬化性合成樹脂層と、熱硬化性合成樹脂層と同等乃至１
０倍以下の厚味を有し、合成樹脂含有率が５〜３５重量
％の熱可塑性合成樹脂層とを交互に然も最外表裏両面は
熱硬化性合成樹脂層となるように重ね合せてなる積層板
が本発明の目的を達成し得ることを確認した。This invention was made for the purpose of obtaining a synthetic resin laminate that can be cut sharply with a laser beam even if it is thick, and as a result of various studies, it has a thickness of 21111t+ or less, and is made of synthetic resin. A thermosetting synthetic resin layer with a content of 5 to 35% by weight, and a thermosetting synthetic resin layer with a content of 5 to 35% by weight.
Thermoplastic synthetic resin layers having a thickness of 0 times or less and having a synthetic resin content of 5 to 35% by weight are alternately stacked so that the outermost front and back surfaces are thermosetting synthetic resin layers. It has been confirmed that the following laminate can achieve the object of the present invention.

本発明において使用される合成樹脂は、積層板の製造に
使用される通常の合成樹脂が使用され、熱硬化性合成樹
脂層形成基材は、フェノール樹脂。The synthetic resin used in the present invention is a common synthetic resin used for manufacturing laminates, and the thermosetting synthetic resin layer forming base material is a phenol resin.

ポリエステル樹脂、メラミン樹脂等の熱硬化性樹脂をク
ラフトパルプ、或いはクラフト紙からなる基材シートに
常法により含浸乾燥し、合成樹脂含有率が５〜３５重量
％の所謂プリプレグの状態に準備され、又熱可塑性合成
樹脂層形成基材はアクリル樹脂、　酢酸ビニル樹脂、ア
クリロニトリルスチレンブタジェンゴム、ポリアミド樹
脂等の熱可塑性樹脂溶液やエマルジョンを前記と同様の
基材シートに常法により含浸或いは塗布乾燥して合成樹
脂含有率が５〜３５重量％のシート状に準備される。A base sheet made of kraft pulp or kraft paper is impregnated with a thermosetting resin such as polyester resin or melamine resin by a conventional method and dried to prepare a so-called prepreg having a synthetic resin content of 5 to 35% by weight. The base material for forming the thermoplastic synthetic resin layer is obtained by impregnating or coating a thermoplastic resin solution or emulsion such as acrylic resin, vinyl acetate resin, acrylonitrile styrene butadiene rubber, polyamide resin, etc. on the same base sheet as above and drying it by a conventional method. A sheet having a synthetic resin content of 5 to 35% by weight is prepared.

本発明においては、上記熱硬化性合成樹脂層形成基材及
び熱可塑性合成樹脂層形成基４Ａは、それぞれを積層成
形した際に熱硬化性合成樹脂層の厚さが２　ｍｉｎ以下
、熱可塑性合成樹脂層の厚さが熱硬化性合成樹脂層と同
等乃至１０倍以下の厚さとなるように調製される。各形
成暴利は、上記の厚みの範囲内で任意枚数重ねて使用す
ることも可能である。In the present invention, the thermosetting synthetic resin layer-forming base material and the thermoplastic synthetic resin layer-forming group 4A are such that the thickness of the thermosetting synthetic resin layer is 2 min or less when laminated and molded, respectively. The thickness of the resin layer is adjusted to be equal to or 10 times or less thick than that of the thermosetting synthetic resin layer. It is also possible to stack any number of sheets of each sheet within the above thickness range.

ついでこれら合成樹脂層形成暴利を交互に然も最外表裏
両面に熱硬化性樹脂層が形成されるよう重ね合せ常法に
より加熱加圧硬化成型し全体の厚味が２ｍｍ以」二の厚
みを有する積層板に成型する。Next, these synthetic resin layer formation layers are layered alternately so that a thermosetting resin layer is formed on both the outermost front and back surfaces, and the resin is cured and molded by heating and pressure using a conventional method to obtain a total thickness of 2 mm or more. Molded into a laminate with

かくして得られた本発明の積層板はこれにレーザ光線を
照射すると極めてシャープな切断をもって切断される積
層板の厚さは３０ｍｍ以下特に２０ｍｍ以下が最適で、
積層板全体の厚味が３０ｍｍを超えるとレーザ光線によ
ってシャープな断面を得ることは困難である。又使用す
るレーザ光線は高出力のものであればその種類を問わな
いが、高出力炭酸ガスレーザが取扱い」二からも最も適
当で、例えば波長　１０．６μＩｎ出力４２５Ｗの炭酸
ガスレーザなどが使用される。When the thus obtained laminate of the present invention is irradiated with a laser beam, the laminate can be cut with extremely sharp cuts.The thickness of the laminate is preferably 30 mm or less, particularly 20 mm or less.
If the thickness of the entire laminate exceeds 30 mm, it is difficult to obtain a sharp cross section with a laser beam. The type of laser beam used does not matter as long as it has a high output, but a high-output carbon dioxide laser is most suitable, for example, a carbon dioxide laser with a wavelength of 10.6 μIn and an output of 425 W is used.

本発明において合成樹脂含有率を５〜３５重量％と規定
した理由は合成樹脂含有率が５重量％未満の場合、基材
シートに幻する樹脂の量が少いため、基材シート相互間
の接着結合が充分に得られず、層間剥離を起して積層板
としての使用に耐えず、又３５重Ｍ％を超えたときはレ
ーザ光線による切断の結果、切断面に樹脂の融解流動に
よる凹凸が観取されシャープな切断面が得られないから
である。又熱硬化性樹脂層と熱可塑性樹脂層の組合せは
種々考えられるが、レーザ光線によりシャープな断面を
得ることの出来る最適な組合せは熱硬化性樹脂層と熱可
塑性樹脂層がそれぞれ同等の厚味をもって交互に形成さ
れ、かつ最外表裏両面に熱硬化性樹脂層が形成された場
合である。The reason why the synthetic resin content is defined as 5 to 35% by weight in the present invention is that when the synthetic resin content is less than 5% by weight, the amount of resin appearing on the base sheet is small, so the adhesion between the base sheets Sufficient bonding may not be obtained, causing delamination and making the laminate unsuitable for use as a laminate.Also, if the weight exceeds 35% by weight, cutting with a laser beam will result in unevenness on the cut surface due to the melting and flowing of the resin. This is because it is difficult to obtain a sharp cut surface. Various combinations of the thermosetting resin layer and the thermoplastic resin layer are possible, but the optimal combination that allows a sharp cross section to be obtained with a laser beam is one in which the thermosetting resin layer and the thermoplastic resin layer have the same thickness. This is a case in which thermosetting resin layers are formed alternately on both the outermost front and back surfaces.

そして、熱硬化性樹脂層の厚味を２ｍｍ以下、熱可塑性
樹脂層の厚味をそれと同等乃至１０倍以下とし、かつ全
体の厚味が２ｍｍを超える積層板に成型するために、合
成樹脂含有率が５〜３５重量％のクラフトパルプ、クラ
フト紙からなるそれぞれの合成樹脂層形成暴利を、何層
づつ組合せて成型ずれば良いかは、既に実験的経験的に
良く知られたところであるが、一般に２０〜７０シのプ
レス圧で成型すると、合成樹脂含有率５〜３５重量％の
クラフトパルプ、クラフト紙からなる合成樹脂層形成基
材の場合、プレス後の厚味はプレス前の厚味の９０〜５
０％となり、従って７０５のプレス圧ならばプレス前の
厚味のほぼ１／２が成型品の厚味となるのである。Then, in order to form a laminate with a thermosetting resin layer thickness of 2 mm or less, a thermoplastic resin layer thickness of the same or 10 times or less, and a total thickness of more than 2 mm, synthetic resin-containing It is already well known experimentally and empirically how many layers should be combined and molded for each synthetic resin layer forming method consisting of kraft pulp and kraft paper with a ratio of 5 to 35% by weight. Generally, when molded with a press pressure of 20 to 70 cm, in the case of a synthetic resin layer forming base material made of kraft pulp or kraft paper with a synthetic resin content of 5 to 35% by weight, the thickness after pressing will be the same as the thickness before pressing. 90-5
Therefore, if the press pressure is 705, the thickness of the molded product will be approximately 1/2 of the thickness before pressing.

以下本発明を実施例により示すが使用される熱硬化性合
成樹脂、熱可塑性合成樹脂は実施例に示されたものに限
るものではなく、互に相溶性のある合成樹脂であるなら
ば使用することが出来、又熱硬化性樹脂層と熱可塑性樹
脂層の組合せも、本発明の限定範囲内にある限り、実施
例に示されたものに限定されるものでないことは勿論で
ある。The present invention will be illustrated below with reference to Examples, but the thermosetting synthetic resins and thermoplastic synthetic resins used are not limited to those shown in the Examples, and any synthetic resins that are compatible with each other may be used. It goes without saying that the combination of the thermosetting resin layer and the thermoplastic resin layer is not limited to those shown in the examples as long as it falls within the scope of the present invention.

実施例１ フェノール１．０モル、ボルムアルデヒド１，２モ／ｌ
／、　Ｎｌ−１４ｃＨ−１０，０４モル、　Ｎａ０ｌ−
１０，Ｑ　１％／ｌ／からなる組成物を９５°Ｃ９０分
間反応し、脱水後メタノールで稀釈し、粘度３ｏｃｐｓ
（３０°Ｃ）固形分６０重量％のメタノール溶性フェノ
ール樹脂ワニスを得た。Example 1 1.0 mol of phenol, 1.2 mol/l of bomaldehyde
/, Nl-14cH-10,04 mol, Na0l-
A composition consisting of 10,Q 1%/l/ was reacted at 95°C for 90 minutes, dehydrated, diluted with methanol, and the viscosity was 3 ocps.
(30°C) A methanol-soluble phenolic resin varnish with a solid content of 60% by weight was obtained.

次に厚味０．３　ｍｍｍ坪量１５謂 ラフトパルプに前記フェノール樹脂ワニスを含浸、絞液
乾燥し樹脂（＝Ｊ着量１８重量％のフェノール樹脂含浸
ブリブレグシ・−トを得た。Next, so-called raft pulp having a thickness of 0.3 mm and a basis weight of 15 was impregnated with the phenolic resin varnish, squeezed and dried to obtain a phenol resin-impregnated brev reg sheet having a resin (=J coverage of 18% by weight).

一方厚味０．３　ｍＩｎ坪量１５０　ｇ／ｍ２の未對ク
ラフト紙に固形分４５重量％のスチレンブタジェンゴム
ラテックスを含浸、絞液乾燥して樹脂ｆｑ着量２１重量
％の熱可塑性合−盛樹脂含有シートを得た。On the other hand, virgin kraft paper with a thickness of 0.3 mIn and a basis weight of 150 g/m2 was impregnated with styrene-butadiene rubber latex with a solid content of 45% by weight, squeezed and dried to form a thermoplastic compound with a resin fq coverage of 21% by weight. A resin-containing sheet was obtained.

次いで前記フェノール樹脂含浸プリプレグシート１０枚
と、熱可塑性合成樹脂含有シート９枚を１枚づつ、しか
も、フェノール樹脂含浸プリプレグシートが最外表裏両
面層を構成するように交互に重ね合せブレス圧６０り温
度　１５０’Ｃ，加熱時間７０分、冷却時間３０分て加
圧成型し製品厚さ３．７　ｍｍの合成樹脂積層板を得た
。Next, the 10 phenol resin-impregnated prepreg sheets and the 9 thermoplastic synthetic resin-containing sheets were alternately stacked one by one so that the phenol resin-impregnated prepreg sheets constituted the outermost front and back layers, and were pressed under a pressure of 60. A synthetic resin laminate having a thickness of 3.7 mm was obtained by pressure molding at a temperature of 150'C, a heating time of 70 minutes, and a cooling time of 30 minutes.

この積層板に液長１０．６μｍｍ出力４２５Ｗの炭酸カ
スレーザを照射し、２枚の積層板に切断したところ、そ
の断面は極めて平滑且シャープであった。When this laminate was irradiated with a carbon dioxide gas laser having a liquid length of 10.6 μmm and an output of 425 W and cut into two laminates, the cross section was extremely smooth and sharp.

実施例２ 実施例１で得られたフェノール樹脂含浸プリプレグシー
ト２７枚と、実施例１で得られた熱可塑性合成樹脂含有
シート２４枚とをフェノール樹脂プリプレグシートが最
外表裏両面層を構成するように３枚ずつ交互に重ね合せ
、プレス圧３０〜湿度１５０　’Ｃ加熱時間７０分冷却
時間４０分でＪＪｕ圧成型成型層板を成型し厚さ１１．
５ｍｍの積層板を得た。Example 2 27 phenolic resin-impregnated prepreg sheets obtained in Example 1 and 24 thermoplastic synthetic resin-containing sheets obtained in Example 1 were combined so that the phenolic resin prepreg sheets constituted the outermost front and back double-sided layers. JJu pressure molded laminates were formed by stacking three sheets alternately at a pressure of 30 to a humidity of 150'C, heating time 70 minutes and cooling time 40 minutes to a thickness of 11.
A 5 mm laminate was obtained.

この積層板に実施例１と同一条件のレーザ光線を照射し
、積層板の中央部を円形に切断したところ円形に穴のあ
いた積層板とその穴に嵌合する円板とを得、その両断面
は実施例］と同様平滑且つシャープであった。This laminate was irradiated with a laser beam under the same conditions as in Example 1, and the central part of the laminate was cut into a circular shape, resulting in a laminate with a circular hole and a disc that fit into the hole. The cross section was smooth and sharp as in Example].

実施例３ ポリエステル樹脂　　　　　６５重ｊｔｔ％（商品名リ
ゴラツク＄２６ｏｏ、昭和高分子株式会社製） ジアリルフタレートプレポリマー３０重ｆｔ％（商品名
ダツププレボリマー、大阪傅達株式会社製） ジアリルフタレートモノマー　　　５重量％からなる組
成物をア七トン：トルニジ−２：１の混合溶媒で稀釈し
、続いて固形分１００重量部に対し触媒としてターシャ
ルブチルパーオキシイソブロピルカーボネート］、、５
重量部を添加偕拌して粘度４０　ＣＰＳ　（３０°Ｃ）
固形分６５％のジアリルフタレート変性ポリエステル樹
脂ワニスを得た。Example 3 Polyester resin 65% by weight (trade name: RIGOLATSUKU $26oo, manufactured by Showa Kobunshi Co., Ltd.) Diaryl phthalate prepolymer 30% by weight (trade name: DAP Prebolymer, manufactured by Osaka Futatsu Co., Ltd.) Diaryl phthalate monomer 5 % by weight was diluted with a 2:1 mixed solvent of a7ton:tornizi, and then tert-butylperoxyisopropyl carbonate was added as a catalyst to 100 parts by weight of solids.
Add parts by weight and stir until the viscosity is 40 CPS (30°C)
A diallylphthalate-modified polyester resin varnish with a solid content of 65% was obtained.

次いで厚味０．３　ｍｍ　＋坪量］　５　Ｑ　ｇ７ｆｎ
’の未朔クラフトパルプに前記ポリエステル樹脂ワニス
を含浸絞液乾燥し樹脂ｆｑ着量３０重量％のポリエステ
ル樹脂含浸プリプレグシートを得た。Next, thickness 0.3 mm + basis weight] 5 Q g7fn
A prepreg sheet impregnated with a polyester resin having a resin fq coverage of 30 wt.

かくて得られたプリプレグシート１０枚と、実施例１で
得られた熱可塑性合成樹脂含有シート８枚を２枚ずつ、
しかもポリエステル樹脂含浸プリプレグシートが最外表
裏両面層を構成するように交互に重ね合ぜ、プレス圧３
０〜温度１５０°Ｃ加熱時間５０分冷却時間３０分て加
圧成型し厚さ４．８ｍｍの積層板を得た。10 prepreg sheets thus obtained and 2 sheets each of 8 thermoplastic synthetic resin-containing sheets obtained in Example 1,
In addition, the polyester resin-impregnated prepreg sheets are alternately layered to form the outermost front and back layers, and the press pressure is 3
A laminate having a thickness of 4.8 mm was obtained by pressure molding at a temperature of 0 to 150° C. for a heating time of 50 minutes and a cooling time of 30 minutes.

この積層板をレーザ光線により実施例１と同一条件で切
断したところ、平滑且つシャープな切断面を得た。When this laminate was cut with a laser beam under the same conditions as in Example 1, a smooth and sharp cut surface was obtained.

実施例４ 実施例３で得られたポリエステル樹脂含浸プリプレグシ
ート５枚と、厚味１．８ｍｍ、坪ｉｔ９００　ｇ／ｍ’
の未−クラフトパルプに、実施例１と同様に固形分４５
゛重量％のスチレンブタジェンゴムラテックスを含浸絞
液乾燥して得られた樹脂付着量１５重量％の熱可塑性合
成樹脂含有シート４枚とをポリエステル樹脂含浸プリプ
レグシートが最外表裏両面層を構成するように１枚ずつ
交互に重ね合せプレス圧２０′￥１湿度１５０°Ｃ加熱
時間６０分冷却時間３０分で加圧成型し厚さ８．１　ｍ
ｍの積層板を得た。得られた積層板をレーザ光線で細か
な曲線をえかいて切断したところ、極めてシャープな曲
線をえかき断面平滑な切片ひ得、ジグソーパズルとして
そのま＼利用することがてきた。Example 4 Five polyester resin-impregnated prepreg sheets obtained in Example 3, thickness 1.8 mm, tsubo it 900 g/m'
In the same manner as in Example 1, the solid content was added to the un-kraft pulp of 45%.
Four sheets containing a thermoplastic synthetic resin with a resin adhesion of 15% by weight obtained by impregnating and squeezing drying styrene-butadiene rubber latex with a polyester resin impregnated prepreg sheet constitute the outermost front and back layers. Layer each sheet alternately as shown in the image below. Pressing pressure 20' ¥1 Humidity 150°C Heating time 60 minutes Cooling time 30 minutes Pressure molding to a thickness of 8.1 m
A laminate of m was obtained. When the resulting laminate was cut by drawing fine curves with a laser beam, the extremely sharp curves were drawn and a section with a smooth cross section was obtained, which could be used as is as a jigsaw puzzle.

実施例５ 実施例３で得られたポリエステル樹脂含浸プリプレグシ
ート１０枚と、厚味０．３　ｍｍ　、坪量１５０　ｇ／
ｍ”の未−クラフト紙に固形分４７重量％の塩化ビニリ
デンラテックスを塗布乾燥して得られた樹脂付着量２９
重量％の熱可塑性合成樹脂シート９枚をポリエステル樹
脂含浸プリプレグシートが最外表裏両面層を構成するよ
うに、１枚ずつ交互に重ね合せプレス圧２０〜湿度１４
０℃加熱時間６０分冷却時間３０分の条件で加圧成型し
厚味が４．７　ｍｍの積層板を得た。Example 5 Ten polyester resin-impregnated prepreg sheets obtained in Example 3, thickness 0.3 mm, basis weight 150 g/
Resin adhesion amount obtained by coating and drying vinylidene chloride latex with a solid content of 47% by weight on 1000 ft. unfinished kraft paper.
% by weight thermoplastic synthetic resin sheets were alternately stacked one by one so that the polyester resin-impregnated prepreg sheet constituted the outermost front and back double-sided layers and pressed at a pressure of 20 to 14% humidity.
A laminate having a thickness of 4.7 mm was obtained by pressure molding under the conditions of heating at 0° C. for 60 minutes and cooling for 30 minutes.

この積層板にレーザ光線を照射して歯車型に切断したと
ころ、切断後何等仕上加工を必要とせずそのま一歯車と
して使用出来るシャ、　　−ブ且つ平滑な切断面を得た
。When this laminated plate was irradiated with a laser beam and cut into a gear shape, a sharp and smooth cut surface was obtained that could be used as a single gear without any finishing work after cutting.

比較実施例 前記実施例１で得られたフェノール樹脂含浸プリプレグ
シートを、１０枚重ね合せプレス圧７０鵞温度１５０°
Ｃ加熱時間４０分冷却時間２０分で゛加圧成型し厚さ１
．５　ｍｍの積層板を得た。この積層板に前記各実施例
と同一条件のレーザ光線を照射し積層板を切断したとこ
ろシャープ且つ平滑な断面を得たが、枚数を２０枚重ね
合せ同一条件で成型した厚味が３、１　ｍｍの積層板は
、レーザ光線による切断面の樹脂が融解しケロイド状と
なってシャープな断面は得られなかった。Comparative Example Ten phenol resin-impregnated prepreg sheets obtained in Example 1 were stacked together at a press pressure of 70 and a temperature of 150°.
C Heating time: 40 minutes Cooling time: 20 minutes Pressure molding to a thickness of 1
．． A 5 mm laminate was obtained. When this laminate was irradiated with a laser beam under the same conditions as in the previous examples and the laminate was cut, a sharp and smooth cross section was obtained. In the case of a laminate of mm in diameter, the resin on the cut surface caused by the laser beam melted and became keloid-like, and a sharp cross section could not be obtained.

また、熱可塑性合成樹脂層のみからなる積層板につきレ
ーザ光線による切断を試みたが、熱可塑性樹脂は比較的
容易に熱分解が起り切断部の拡大融着等を起してシャー
プな断面はとうてい得られなかった。In addition, we attempted to cut a laminate consisting only of a thermoplastic synthetic resin layer using a laser beam, but thermoplastic resin thermally decomposes relatively easily and causes expansion and fusion of the cut portion, making it difficult to obtain a sharp cross section. I couldn't get it.

以上詳細に述べた実施例で説明した通り、本発明の構成
からなる積層板はその厚味が２ｍｍを超えるような厚い
ものであってもレーザ光線の照射によって極めてシャー
プ且つ平滑に切断され、然もジグソー等によっては実施
することが出来ないような細かな曲線形状のものも自由
に且つ安定した精度をもつユ切断することができた。As explained in the detailed examples above, even if the laminated plate having the structure of the present invention is thicker than 2 mm, it can be cut extremely sharply and smoothly by laser beam irradiation. It was also possible to freely and stably cut objects with fine curved shapes that cannot be cut with a jigsaw or the like.

Claims (1)

【特許請求の範囲】[Claims] ２ｍｍ以下の厚味を有し、合成樹脂含有率が５〜３５重
量％の熱硬化性合成樹脂層と、熱硬化性合成樹脂層と同
等乃至１０倍以下の厚味を有し、合成樹脂含有率が５〜
３５重量％の熱可塑性合成樹脂層とを交互に、然も最外
表裏両面は熱硬化性合成樹脂層となるように重ね合せて
なる、レーザ光線によりシャープな切断が可能な合成樹
脂積層板。A thermosetting synthetic resin layer with a thickness of 2 mm or less and a synthetic resin content of 5 to 35% by weight, and a thermosetting synthetic resin layer with a thickness equal to or less than 10 times that of the thermosetting synthetic resin layer and containing synthetic resin. Rate is 5~
A synthetic resin laminate that can be sharply cut with a laser beam, which is made by laminating 35% by weight thermoplastic synthetic resin layers alternately so that the outermost front and back surfaces are thermosetting synthetic resin layers.