JP2001105431A - Sheet molding compound - Google Patents
Sheet molding compoundInfo
- Publication number
- JP2001105431A JP2001105431A JP28802199A JP28802199A JP2001105431A JP 2001105431 A JP2001105431 A JP 2001105431A JP 28802199 A JP28802199 A JP 28802199A JP 28802199 A JP28802199 A JP 28802199A JP 2001105431 A JP2001105431 A JP 2001105431A
- Authority
- JP
- Japan
- Prior art keywords
- smc
- glass fiber
- glass
- fibers
- reinforcing material
- 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
Landscapes
- Reinforced Plastic Materials (AREA)
- Manufacture Of Macromolecular Shaped Articles (AREA)
Abstract
Description
【0001】[0001]
【発明の属する技術分野】本発明は、成形品の強度が高
く、かつ強度の均一性に優れたシートモールディングコ
ンパウンド(以下、SMCと称する)に関する。BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a sheet molding compound (hereinafter, referred to as SMC) having high strength of a molded article and excellent strength uniformity.
【0002】[0002]
【従来の技術】SMCは、一般に、熱硬化性樹脂組成物
に、長さが通常は80mm以下、最も多くの場合は長さ
が25mm前後である比較的短いガラス繊維切断物、即
ちガラスチョップドストランド(以下、CSと称する)
を強化材として含有させ、増粘してなるシート状の成形
材料で、所望の大きさに裁断してプレス成形機の金型に
入れて加圧および加熱するだけで成形品が得られるもの
である。2. Description of the Related Art SMC is generally used in thermosetting resin compositions to cut relatively short glass fiber having a length of usually 80 mm or less, most often about 25 mm, that is, a glass chopped strand. (Hereinafter referred to as CS)
Is contained as a reinforcing material, and is a sheet-like molding material obtained by increasing the viscosity, and a molded product can be obtained by simply cutting into a desired size, putting into a mold of a press molding machine, and pressing and heating. is there.
【0003】しかしながら、上記CSを含有するSMC
を成形して得た成形品の場合、特に水タンクパネル、ケ
ーシング、自動車部品、ハウジングなどに代表される構
造部材として適用するには、成形品の強度が不十分であ
るので、このような用途においてでも適用可能な十分な
強度を有する成形品を得るために、長さが比較的長いガ
ラス長繊維または連続ガラス繊維を強化材として用いた
SMC(以下、L−SMCと称する)が知られている。[0003] However, SMC containing the above CS
In the case of a molded article obtained by molding a molded article, the strength of the molded article is insufficient to apply as a structural member typified by a water tank panel, a casing, an automobile part, a housing, and the like. In order to obtain a molded product having a sufficient strength that can be applied even in SMC, an SMC (hereinafter, referred to as L-SMC) using a relatively long glass continuous fiber or a continuous glass fiber as a reinforcing material is known. I have.
【0004】例えば、特開平9−155861号公報に
は、強化材としての長さが500〜4000mmのガラ
ス繊維を渦状無方向に分散させたL−SMCが開示され
ており、特開平5−301221号公報には、強化材と
しての連続ガラス繊維を無方向に分散させたL−SMC
が開示されている。[0004] For example, Japanese Patent Application Laid-Open No. 9-155561 discloses an L-SMC in which glass fibers having a length of 500 to 4000 mm as a reinforcing material are spirally dispersed in a non-directional manner. JP-A No. 1993-1989 discloses L-SMC in which continuous glass fiber as a reinforcing material is non-directionally dispersed.
Is disclosed.
【0005】また、強化材としてCSと、長さが比較的
長いガラス長繊維または連続ガラス繊維との両者を併用
したL−SMCも知られており、例えば、特開昭59−
24726号公報には、長さ80mm以上(好ましくは
120〜2000mm)の比較的長いガラス長繊維と長
さ10〜50mmのCSとを強化材として併用したL−
SMCが開示されており、特開平5−301220号公
報には、連続ガラス繊維と長さ12〜50mmのCSと
を強化材として併用したL−SMCが開示されている。[0005] Further, L-SMC using both CS as a reinforcing material and relatively long glass continuous fibers or continuous glass fibers is also known.
Japanese Patent No. 24726 discloses L- using a relatively long glass filament having a length of 80 mm or more (preferably 120 to 2000 mm) and a CS having a length of 10 to 50 mm in combination.
An SMC is disclosed, and JP-A-5-301220 discloses an L-SMC using continuous glass fiber and CS having a length of 12 to 50 mm as a reinforcing material.
【0006】[0006]
【発明が解決しようとする課題】L−SMCを含むSM
Cは、一般的に次のような方法によって連続的に製造さ
れている(図1参照)。即ち、2枚の熱可塑性樹脂フィ
ルムの一方に熱硬化性樹脂組成物を塗布して樹脂層を形
成させ、その樹脂層の上に強化材であるガラス繊維を散
布して強化材層を形成させる。また、他方の熱可塑性樹
脂フィルムにも熱硬化性樹脂組成物を塗布して樹脂層を
形成させた後、二つの樹脂層で強化材層がサンドイッチ
されるように両者を重ね合わせる。続いて、これをロー
ルプレス装置やベルトプレス装置を用いて狭圧して熱硬
化性樹脂組成物を強化材に含浸させ、所定量を巻き取る
か、折り畳むかしてから包装した後、所定時間の熟成を
経て熱硬化性樹脂組成物を増粘させてSMCとする。SUMMARY OF THE INVENTION SM including L-SMC
C is generally manufactured continuously by the following method (see FIG. 1). That is, a thermosetting resin composition is applied to one of two thermoplastic resin films to form a resin layer, and a glass fiber as a reinforcing material is sprayed on the resin layer to form a reinforcing material layer. . Further, after the thermosetting resin composition is applied to the other thermoplastic resin film to form a resin layer, the two are overlapped so that the reinforcing material layer is sandwiched between the two resin layers. Subsequently, the thermosetting resin composition is impregnated with the reinforcing material by narrowing the pressure using a roll press device or a belt press device, and a predetermined amount is wound up or folded, and then packed, and then, After aging, the thermosetting resin composition is thickened to form SMC.
【0007】上記のような製造方法においては、強化材
としてのCSを用いたSMCの場合には、ガラス繊維の
長さが比較的短いので、樹脂層の上にCSを散布する量
がSMCの全幅にわたって均一になるように制御しやす
い。しかし、L−SMCの場合にはガラス繊維の長さが
長いので、幅方向の両端部分においては、樹脂層の端縁
と強化材層の端縁とを一致させて、強化材の含有率を幅
方向の中央部分と一致させるように制御することが難し
い。故に、樹脂層の端縁から強化材がはみ出してしまっ
たり、逆に、強化材の散布量が少なくなってL−SMC
の両端部分に熱硬化性樹脂組成物の比率が高い(強化材
の含有率が低い)部分が生じる場合が多かった。後者の
場合に具体的には、図4に示すように、L−SMCの幅
を1000mmとした場合、その幅の両端から内側へ2
00mm前後までの範囲の幅において、中心側から両端
に向かって強化材の含有率が、幅方向の中央部分の正規
の値から次第に低下していく傾向にあった。In the above manufacturing method, in the case of SMC using CS as a reinforcing material, since the length of glass fiber is relatively short, the amount of spraying CS on the resin layer is limited by the amount of SMC. It is easy to control to be uniform over the entire width. However, in the case of L-SMC, since the length of the glass fiber is long, at both ends in the width direction, the edge of the resin layer and the edge of the reinforcing material layer are made to coincide with each other, and the content of the reinforcing material is reduced. It is difficult to control so as to match the central part in the width direction. Therefore, the reinforcing material protrudes from the edge of the resin layer, and conversely, the amount of the reinforcing material sprayed is reduced and L-SMC is reduced.
In many cases, a portion where the ratio of the thermosetting resin composition was high (the content of the reinforcing material was low) was formed at both ends of the sample. Specifically, in the latter case, as shown in FIG. 4, when the width of the L-SMC is set to 1000 mm, two inwards from both ends of the width.
At a width in the range of about 00 mm, the content of the reinforcing material tended to gradually decrease from the normal value in the center in the width direction from the center side toward both ends.
【0008】上記のような樹脂層の端縁から強化材がは
み出してしまったL−SMCでは、成形に際して強化材
がはみ出した部分を切除してから成形する必要があるた
め、作業が煩雑であるとともに、製品の歩留まりが低く
なるという問題があった。一方、両端部分に強化材の含
有率が低い部分が生じたL−SMCでは、成形して得た
成形品の末端(周縁部分)に微細なクラック(ヘアーク
ラック)が発生し、成形品の強度や外観が損なわれると
いう問題があった。In the case of the L-SMC in which the reinforcing material has protruded from the edge of the resin layer as described above, it is necessary to cut off the portion where the reinforcing material has protruded during molding, and then to perform molding. At the same time, there has been a problem that the yield of products is low. On the other hand, in the L-SMC in which a portion having a low content of the reinforcing material is formed at both ends, fine cracks (hair cracks) are generated at the ends (peripheral portions) of the molded product obtained by molding, and the strength of the molded product is increased. And the appearance is impaired.
【0009】また、L−SMCの単位面積当たりの重量
(厚さ)を小さくすれば、幅方向の中央部分と両端部分
との強化材含有率の差も小さくなる(含有率の低下の度
合いが小さくなる)ので、成形品のヘアーラックの発生
を抑えることができる。しかしながら、L−SMCの単
位面積重量を小さくすると、成形する際に金型へより多
くの枚数のL−SMCを装入しなければならず、成形時
の作業性や生産性を著しく損ねるという問題が生じてし
まう。When the weight (thickness) per unit area of the L-SMC is reduced, the difference in the reinforcing material content between the central portion and both end portions in the width direction is also reduced (the degree of the reduction in the content is reduced). (Reduced size), so that the generation of hair racks in the molded product can be suppressed. However, when the unit area weight of the L-SMC is reduced, a larger number of L-SMCs must be charged into a mold at the time of molding, which significantly impairs workability and productivity during molding. Will occur.
【0010】さらに、強化材としてCSと、長さが比較
的長いガラス長繊維または連続ガラス繊維との両者を併
用したL−SMCであっても、上記と同様の問題が避け
られない。また、両端部分において低くなっている強化
材(ガラス繊維)の含有率を中央部分での正規の強化材
の含有率と同じ値にしようとして、L−SMCの全幅に
わたってCSの散布量を増やすと、中央部分においては
強化材含有率が高くなり過ぎて、樹脂組成物がガラス繊
維に含浸し難くなって、得られる成形品の強度が低下し
たり、外観が悪くなったりするという問題もあった。[0010] Furthermore, even in the case of L-SMC using both CS as a reinforcing material and a relatively long glass long fiber or continuous glass fiber, the same problem as described above cannot be avoided. Further, in order to make the content of the reinforcing material (glass fiber) lowered at both ends to the same value as the content of the regular reinforcing material at the center, the amount of CS spread over the entire width of L-SMC is increased. However, in the central portion, the content of the reinforcing material becomes too high, so that the resin composition is hardly impregnated into the glass fiber, resulting in a problem that the strength of the obtained molded product is reduced or the appearance is deteriorated. .
【0011】CSとガラス長繊維とを併用したL−SM
Cにおいて、ガラス繊維への樹脂組成物の含浸度合いを
高めるために、強化材(ガラス繊維)の含有率を全体的
に下げることも考えられるが、この場合には、得られる
成形品の機械的強度が低下してしまうので、現実的な対
策にはなり得ない。従って、本発明の目的は、SMCに
おいて、強化材の幅方向のはみ出しがなく、かつ強化材
の含有率がSMCの幅方向において全体的に実質的に同
一であり、クラックなどの欠陥が生じることなく優れた
強度と強度の均一性を有する成形品を与えるSMCを提
供することである。L-SM combining CS and long glass fiber
In C, in order to increase the degree of impregnation of the resin composition into the glass fiber, it is conceivable to decrease the content of the reinforcing material (glass fiber) as a whole. Since the strength is reduced, it cannot be a practical measure. Therefore, an object of the present invention is to prevent the reinforcement in the SMC from protruding in the width direction, and the content of the reinforcement is substantially substantially the same in the width direction of the SMC, and defects such as cracks are generated. An object of the present invention is to provide an SMC which gives a molded article having excellent strength and uniformity of strength.
【0012】[0012]
【課題を解決するための手段】本発明は、熱硬化性樹脂
組成物にガラス繊維を強化材として配合し、増粘してな
るSMCにおいて、SMCの全幅にわたってガラス長繊
維または連続ガラス繊維が無方向に分散され、かつSM
Cの全幅をXmmとした場合、幅方向の両端部分には、
該端縁から内側へ0.05×Xmm〜0.3×Xmmま
での範囲の幅で、ガラス短繊維が分散されていることを
特徴とするSMCを提供する。SUMMARY OF THE INVENTION According to the present invention, there is provided an SMC obtained by compounding a thermosetting resin composition with glass fiber as a reinforcing material and increasing the viscosity of the SMC. Distributed in the direction and SM
When the total width of C is X mm, at both ends in the width direction,
Provided is an SMC characterized in that short glass fibers are dispersed in a width in a range from 0.05 × X mm to 0.3 × X mm inward from the edge.
【0013】[0013]
【発明の実施の形態】次に好ましい実施の形態を挙げて
本発明を詳細に説明する。本発明のSMCは、図1のA
部の幅方向の拡大断面図である図2に示されるように、
上下の樹脂層の間に、強化材であるガラス長繊維または
連続ガラス繊維22およびガラス短繊維21がサンドイ
ッチ構造状に包含されている。また、図1のB部の拡大
平面図である図3に示すように、ガラス長繊維または連
続ガラス繊維32が、SMCの全幅にわたって無方向に
分散しており、かつ幅方向両端部にはガラス短繊維31
が分散され、SMCの幅全体にわたってガラス繊維の含
有率が実質的に同一になるようにされている。Next, the present invention will be described in detail with reference to preferred embodiments. The SMC according to the present invention is shown in FIG.
As shown in FIG. 2 which is an enlarged cross-sectional view in the width direction of the portion,
Between the upper and lower resin layers, glass long fibers or continuous glass fibers 22 and glass short fibers 21 as a reinforcing material are contained in a sandwich structure. Further, as shown in FIG. 3 which is an enlarged plan view of a portion B in FIG. 1, glass long fibers or continuous glass fibers 32 are dispersed in a non-direction over the entire width of the SMC, and glass is provided at both ends in the width direction. Short fiber 31
Is dispersed so that the glass fiber content is substantially the same over the entire width of the SMC.
【0014】なお、図2および図3は、理解が容易であ
るように、SMCの幅方向の両端部にはガラス長繊維ま
たは連続ガラス繊維が存在しないように描かれている
が、実際には、ガラス長繊維または連続ガラス繊維は、
これらの繊維がSMCの両端縁からはみ出さないように
分散されているので、SMCの両端部にはある程度の含
有率でガラス長繊維または連続ガラス繊維が存在してい
る。Although FIGS. 2 and 3 are drawn so that long glass fibers or continuous glass fibers do not exist at both ends in the width direction of the SMC for easy understanding, in actuality, FIG. , Glass long fiber or continuous glass fiber,
Since these fibers are dispersed so as not to protrude from both ends of the SMC, glass long fibers or continuous glass fibers exist at both ends of the SMC at a certain content.
【0015】また、上記において「実質的に同一」と
は、SMCを成形し、本発明の目的が達成される範囲で
あれば、ガラス繊維の含有率に差があっても許容される
ことを意味し、具体的には両端部分のガラス繊維の総含
有率は「中央部分のガラス繊維の含有率±15重量%、
好ましくは±10重量%」の範囲である。例えば、SM
Cの幅方向中央部分のガラス繊維の含有率が40重量%
であれば、SMCの両端部分のガラス繊維の総含有率が
25〜55重量%、好ましくは30〜50重量%になる
ようにすればよい。ここで、両端部分のガラス繊維の
「総含有率」とは、ガラス長繊維または連続ガラス繊維
と、ガラス短繊維との両者を合わせた含有率のことであ
る。[0015] In the above, "substantially the same" means that the SMC is molded and a difference in glass fiber content is permissible as long as the object of the present invention is achieved. Meaning, specifically, the total content of glass fibers at both ends is “the content of glass fibers at the center ± 15% by weight,
It is preferably in the range of ± 10% by weight. For example, SM
The content of glass fiber in the center in the width direction of C is 40% by weight.
If so, the total content of glass fibers at both ends of the SMC may be 25 to 55% by weight, preferably 30 to 50% by weight. Here, the “total content” of the glass fibers at both ends is the combined content of both glass long fibers or continuous glass fibers and short glass fibers.
【0016】以下、使用する材料および製造方法を挙げ
て本発明をさらに詳しく説明する。本発明で使用する熱
硬化性樹脂組成物とは、熱硬化性樹脂に必要に応じて充
填材やその他の添加剤を配合したものであって、従来公
知のSMCに使用されている熱硬化性樹脂組成物と同様
である。例えば、熱硬化性樹脂としては、不飽和ポリエ
ステル樹脂、ビニルエステル樹脂、フェノール樹脂、エ
ポキシ樹脂などが用いられるが、好ましくは不飽和ポリ
エステル樹脂、ビニルエステル樹脂が用いられる。これ
らの熱硬化性樹脂には通常スチレンなどのモノマー成分
が添加されており、さらに必要に応じてポリスチレンな
どの非反応性の熱可塑性樹脂などが添加され、最終的な
組成物はペースト状となっている。Hereinafter, the present invention will be described in more detail with reference to the materials used and the manufacturing method. The thermosetting resin composition used in the present invention is a thermosetting resin obtained by blending a filler and other additives as necessary with the thermosetting resin. Same as the resin composition. For example, as the thermosetting resin, an unsaturated polyester resin, a vinyl ester resin, a phenol resin, an epoxy resin or the like is used, and preferably, an unsaturated polyester resin or a vinyl ester resin is used. These thermosetting resins are usually added with a monomer component such as styrene, and if necessary, a non-reactive thermoplastic resin such as polystyrene is added, so that the final composition becomes a paste. ing.
【0017】充填材は、用途に応じて種々のものが種々
の割合で混合使用されるが、通常の混合比率は、熱硬化
性樹脂100重量部に対して200重量部以下である。
充填材としては、例えば、炭酸カルシウム、水酸化アル
ミニウム、ガラス微粉末、ガラスバルーンなどが用いら
れるが、通常は、炭酸カルシウム、水酸化アルミニウム
が使用される。さらに熱硬化性樹脂組成物中には、必要
に応じて、重合開始剤、離型剤、着色剤、低収縮剤、増
粘剤およびその他の公知の添加剤を適宜含有させること
ができ、これらは常法に従って混合使用される。As the filler, various fillers are mixed and used in various ratios depending on the application. The usual mixing ratio is 200 parts by weight or less with respect to 100 parts by weight of the thermosetting resin.
As the filler, for example, calcium carbonate, aluminum hydroxide, glass fine powder, glass balloon and the like are used, and usually, calcium carbonate and aluminum hydroxide are used. Furthermore, in the thermosetting resin composition, if necessary, a polymerization initiator, a release agent, a coloring agent, a low shrinkage agent, a thickener and other known additives can be appropriately contained, and these Are mixed and used according to a conventional method.
【0018】本発明では、強化材として用いるガラス繊
維として、フィラメント径が直径で6〜16μmである
フィラメントを多数集束させて得た、番手が500〜5
000g/km(Tex)であるガラス繊維が好ましく
用いられる。すなわち、フィラメント径が6μm未満で
は、ガラス繊維自体の生産性が低く、コスト高となり現
実的でない。また、16μmを超える場合には、フィラ
メントの比表面積が減り、熱硬化性樹脂との接触面積が
少なくなって、成形品の強度が低下する場合がある。In the present invention, the glass fiber used as the reinforcing material is obtained by bundling a large number of filaments having a diameter of 6 to 16 μm and having a count of 500 to 5.
Glass fibers of 000 g / km (Tex) are preferably used. That is, if the filament diameter is less than 6 μm, the productivity of the glass fiber itself is low, and the cost is high, which is not practical. On the other hand, if it exceeds 16 μm, the specific surface area of the filament decreases, the contact area with the thermosetting resin decreases, and the strength of the molded product may decrease.
【0019】また、ガラス繊維の番手が500g/km
未満の場合、SMCに必要とされるガラス繊維含有率を
得るためには多数のガラス繊維本数が必要となり、ガラ
ス繊維を散布した強化材の層が嵩高なものとなって、熱
硬化性樹脂組成物の含浸がしずらくなり、未含浸部分が
生じ、この部分が加圧成形後、内部剥離を生じる原因に
なることがあるため、成形品の強度に悪影響を及ぼしや
すい。また、番手が5000g/kmを超える場合に
は、ガラス繊維が太すぎて、ガラス繊維のSMC内にお
ける分布が不均一になり易く、この場合も成形品の強度
が不均一となり易い。The count of glass fiber is 500 g / km.
If it is less than this, a large number of glass fibers are required to obtain the glass fiber content required for SMC, and the reinforcing material layer in which the glass fibers are scattered becomes bulky, and the thermosetting resin composition The impregnation of the material becomes difficult, and an unimpregnated portion is generated. This portion may cause internal peeling after the pressure molding, and therefore, the strength of the molded product is easily adversely affected. When the count exceeds 5000 g / km, the glass fiber is too thick, and the distribution of the glass fiber in the SMC tends to be uneven. In this case, the strength of the molded product tends to be uneven.
【0020】本発明では、図2および図3に図解的に示
すように、上記の如きガラス繊維として長さが異なる2
種のガラス繊維21および31、ならびに22および3
2を用いる。SMC23,33の全幅わたって分散させ
るガラス繊維は、500〜4000mmのガラス長繊維
または連続ガラス繊維(切断されておらず、連続してい
るガラス繊維)である。このガラス長繊維の長さが50
0mm未満であると、このガラス長繊維をSMC内にお
いて無方向に均一に分散させることが難しく、4000
mmを超えると切断装置が大掛かりなものになってしま
って現実的ではない。なお、連続ガラス繊維であれば、
切断装置を用いることなく、連続ガラス繊維を無方向に
均一に分散させることができる。In the present invention, as schematically shown in FIGS. 2 and 3, glass fibers having different lengths as described above are used.
Seed glass fibers 21 and 31, and 22 and 3
2 is used. The glass fibers dispersed over the entire width of the SMCs 23 and 33 are glass long fibers of 500 to 4000 mm or continuous glass fibers (glass fibers that are not cut but continuous). The length of this glass filament is 50
If the length is less than 0 mm, it is difficult to uniformly disperse the glass long fibers in the SMC in the non-direction, and it is difficult to disperse the glass filaments in the SMC.
If it exceeds mm, the cutting device becomes large-scale and is not practical. In addition, if it is continuous glass fiber,
The continuous glass fibers can be uniformly dispersed in the non-direction without using a cutting device.
【0021】本発明で用いるガラス短繊維の長さは5〜
100mmであり、好ましくは25〜50mmである。
長さが5mm未満の場合には、SMCの両端部分に相当
する成形品の部分の強度が局部的に弱くなる。一方、1
00mmを超えると、樹脂層の端縁と強化材層の端縁と
を一致させるように散布状態を制御することが難しくな
る。The short glass fiber used in the present invention has a length of 5 to 5.
It is 100 mm, preferably 25 to 50 mm.
If the length is less than 5 mm, the strength of the part of the molded product corresponding to both ends of the SMC becomes locally weak. Meanwhile, 1
If it exceeds 00 mm, it becomes difficult to control the spraying state so that the edge of the resin layer and the edge of the reinforcing material layer coincide with each other.
【0022】上記ガラス長繊維または連続ガラス繊維
(A)およびガラス短繊維(B)のSMCに対する含有
率は、ガラス繊維全体としてSMC全体の重量を基準に
20〜60重量%であることが好ましく、より好ましく
は25〜40重量%である。ガラス繊維の含有率が、S
MCに対して20重量%未満では、所望の強度の成形品
を得ることができず、60重量%を超えると、SMC製
造時において熱硬化性樹脂組成物のガラス繊維への含浸
が難しく、未含浸部で加圧成形後、成形品の内部剥離を
生ずるなど、成形品に対して強度的に悪影響を及ぼす場
合があり、実際的でない。The content of the glass long fiber or continuous glass fiber (A) and short glass fiber (B) with respect to SMC is preferably 20 to 60% by weight based on the weight of the entire SMC as a whole glass fiber. More preferably, it is 25 to 40% by weight. The glass fiber content is S
If the amount is less than 20% by weight with respect to MC, a molded article having a desired strength cannot be obtained. If the amount exceeds 60% by weight, it is difficult to impregnate the thermosetting resin composition into glass fibers at the time of SMC production. After pressure molding in the impregnated part, the molded article may have an adverse effect on strength, such as internal peeling of the molded article, which is not practical.
【0023】SMCの幅方向両端部における上記ガラス
繊維全体を100重量部とした場合に、ガラス長繊維ま
たは連続ガラス繊維Aとガラス短繊維Bとの重量比は
A:B=60〜95:40〜5、好ましくは50〜8
0:50〜20であり、前述の通りSMCの全幅にわた
りガラス繊維の含有率を実質的に同一に近づけるように
することが好ましい。散布する幅にもよるが、ガラス長
繊維または連続ガラス繊維Aの比率が高すぎると、得ら
れるSMCの幅方向端縁からガラス長繊維または連続ガ
ラス繊維Aがはみ出したり、中央部のガラス長繊維また
は連続ガラス繊維Aの含有率が高くなり過ぎ、後の加工
が煩雑であったり、また、幅方向端部のガラス繊維含有
率が相対的に低下し、全幅にわたってガラス繊維の含有
率を平均化するのが難しい。一方、ガラス長繊維または
連続ガラス繊維Aの比率が低過ぎると、成形品の強度の
向上が少ない。When the entire glass fiber at both ends in the width direction of the SMC is 100 parts by weight, the weight ratio of the long glass fiber or continuous glass fiber A to the short glass fiber B is A: B = 60 to 95:40. -5, preferably 50-8
0:50 to 20 and it is preferable to make the glass fiber content substantially the same over the entire width of the SMC as described above. If the ratio of the long glass fiber or the continuous glass fiber A is too high, the long glass fiber or the continuous glass fiber A may protrude from the edge in the width direction of the obtained SMC, or the long glass fiber in the center may vary depending on the spraying width. Or, the content of the continuous glass fiber A becomes too high, and the subsequent processing is complicated, or the glass fiber content at the end in the width direction relatively decreases, and the content of the glass fiber is averaged over the entire width. Difficult to do. On the other hand, when the ratio of the long glass fiber or the continuous glass fiber A is too low, the strength of the molded product is not improved much.
【0024】また、図2および図3に示すように、SM
Cの全幅をXmm(例えば1000mm)とした場合、
ガラス短繊維Bを配合する幅方向の両端部分の幅Yは、
該端縁から内側へY=0.05×Xmm〜0.3×Xm
m(例えば50〜300mm)までの範囲の幅であり、
好ましくはY=0.15×Xmm〜0.25×Xmmま
での範囲の幅である。幅Yが広すぎる時には、SMCの
幅方向中央部分の周辺にガラス繊維含有率が高くなり過
ぎる部分ができて、樹脂組成物の未含浸部分が生じて、
最終的に得られる成形品の強度が不足したり外観が悪化
し、また、幅Yが狭すぎると、両端部分にガラス繊維含
有率が低い部分ができて、本発明の効果を充分に得るこ
とができない。As shown in FIG. 2 and FIG.
When the entire width of C is X mm (for example, 1000 mm),
The width Y of both ends in the width direction in which the short glass fiber B is blended is
Inward from the edge Y = 0.05 × Xmm to 0.3 × Xm
m (for example, 50 to 300 mm),
Preferably, the width is in the range of Y = 0.15 × Xmm to 0.25 × Xmm. When the width Y is too wide, a portion where the glass fiber content becomes too high is formed around the central portion in the width direction of the SMC, and an unimpregnated portion of the resin composition occurs,
If the strength of the finally obtained molded product is insufficient or the appearance is deteriorated, and if the width Y is too narrow, portions having a low glass fiber content are formed at both end portions, and the effect of the present invention can be sufficiently obtained. Can not.
【0025】以上の如き本発明のSMCの幅は通常75
0〜1200mmであり、単位面積当たりの重量は2〜
8kg/m2であることが好ましい。このような単位面
積当たりの重量とすることにより、材料の歩留が向上す
るとともに、成形時に成形装置へのSMCのチャージの
自由度が向上し、作業性が向上するThe width of the SMC of the present invention as described above is usually 75
0 to 1200 mm, and the weight per unit area is 2 to
It is preferably 8 kg / m 2 . By setting the weight per unit area as described above, the yield of the material is improved, and the degree of freedom of charging the SMC to the molding apparatus at the time of molding is improved, and the workability is improved.
【0026】本発明のSMCの製造方法は、上記のよう
に長さが異なる2種のガラス繊維AおよびBを用いる以
外は、従来公知のSMCの製造装置を一部変更して行な
うことができる。図1は本発明で使用するSMC製造装
置の一例を示す概略図である。本装置では、樹脂タンク
1,3に前述の熱硬化性樹脂組成物2,4を仕込み、樹
脂タンク1,3から供給された樹脂組成物2,4をドク
ターナイフ5,7により熱可塑性樹脂フィルム(例え
ば、ポリエチレンフィルムなど)6,8の内面上に塗布
してフィルム上に樹脂層を形成する。The method for producing an SMC of the present invention can be carried out by partially modifying a conventionally known apparatus for producing an SMC, except that two kinds of glass fibers A and B having different lengths are used as described above. . FIG. 1 is a schematic diagram showing an example of an SMC manufacturing apparatus used in the present invention. In this apparatus, the above-mentioned thermosetting resin compositions 2 and 4 are charged into the resin tanks 1 and 3, and the resin compositions 2 and 4 supplied from the resin tanks 1 and 3 are thermoplastic resin films by doctor knives 5 and 7. The resin layer is formed on the inner surface of each of the films 6 and 8 (for example, a polyethylene film) by coating the film on the inner surface.
【0027】一方の熱可塑性樹脂フィルム8の内面上に
塗布した樹脂層の上にケーキ9から引き出された連続ガ
ラス繊維10を互いに反対方向に回転する2つのロール
からなるガラス繊維供給装置11によって、樹脂層の両
端縁から連続ガラス繊維12がはみ出さないように無方
向にできるだけ均一に散布させる。この際、連続ガラス
繊維12に代えてガラス長繊維を用いる場合には、ガラ
ス繊維供給装置11をロービングカッター(C部の拡大
変更図参照)に変更し、切断刃13aを有するカッター
ロール13とピンチロール14との組み合わせにより連
続ガラス繊維10を所定の長さに切断して、連続ガラス
繊維12の場合と同様にガラス長繊維を無方向に均一に
散布させればよい。The continuous glass fibers 10 drawn from the cake 9 are placed on the resin layer applied on the inner surface of one thermoplastic resin film 8 by a glass fiber supply device 11 composed of two rolls rotating in opposite directions. The continuous glass fibers 12 are sprayed as uniformly as possible in the non-direction so that the continuous glass fibers 12 do not protrude from both ends of the resin layer. At this time, when long glass fibers are used in place of the continuous glass fibers 12, the glass fiber supply device 11 is changed to a roving cutter (see the enlarged view of the portion C), and the cutter roll 13 having the cutting blade 13a is pinched. The continuous glass fiber 10 may be cut into a predetermined length by a combination with the roll 14, and the glass long fiber may be uniformly sprinkled in the non-direction similarly to the case of the continuous glass fiber 12.
【0028】さらに、ロービング15をガラス繊維供給
装置16においてロービングカッター17で切断して得
られたガラス短繊維18を、上記熱可塑性樹脂フィルム
8の樹脂層上の両側端部に所定の幅で散布させ、次いで
上記2枚の熱可塑性樹脂フィルム6,8の樹脂層が形成
された内面同士を重ね合わせ、脱泡・含浸ロール19に
てガラス繊維強化材に樹脂組成物を含浸および混入した
後、巻取ロール20により巻取り、熟成および増粘を行
い、本発明のSMCを得ることができる。なお、ガラス
長繊維または連続ガラス繊維とガラス短繊維を散布およ
び分散させる順番は、上述の順番でも、あるいは逆で
も、同時若しくは交互に2層以上重ねて分散させてもよ
い。Further, short glass fibers 18 obtained by cutting the rovings 15 with a roving cutter 17 in a glass fiber supply device 16 are sprayed on both sides of the thermoplastic resin film 8 at a predetermined width on the resin layer. Then, the inner surfaces of the two thermoplastic resin films 6 and 8 on which the resin layers are formed are overlapped with each other, and the glass fiber reinforced material is impregnated with the resin composition and mixed with the defoaming / impregnating roll 19. The SMC of the present invention can be obtained by winding, aging and thickening by the winding roll 20. The order in which the long glass fiber or the continuous glass fiber and the short glass fiber are scattered and dispersed may be the above-described order or may be reversed, or two or more layers may be simultaneously or alternately stacked and dispersed.
【0029】また、熱可塑性樹脂フィルム6,8の内面
に、熱硬化性樹脂組成物2,4による樹脂層を形成する
方法としては、前述のドクターナイフ5,7による方法
以外にもカーテンコート、シャワーコートおよびスプレ
ーコートなどが使用できる。本発明のSMCの製造にお
いて、ガラス繊維の供給装置11,16に用いる各1対
のロールは、通常のゴム製ロールでもよいが、少なくと
も一方が金属あるいは硬質プラスチック製である方が、
ガラス繊維を滑ることなく引き出す上で好ましく、さら
に好ましくは、金属あるいは硬質プラスチック製ロール
の長手方向に溝または突起を有するものを用いるのがよ
い。As a method of forming a resin layer of the thermosetting resin compositions 2 and 4 on the inner surfaces of the thermoplastic resin films 6 and 8, besides the method using the doctor knives 5 and 7, curtain coating, Shower coats and spray coats can be used. In the production of the SMC of the present invention, each pair of rolls used for the glass fiber supply devices 11 and 16 may be a normal rubber roll, but it is preferable that at least one of the rolls is made of metal or hard plastic.
It is preferable to pull out the glass fiber without slipping, and it is more preferable to use a metal or hard plastic roll having a groove or a protrusion in the longitudinal direction.
【0030】また、ガラス長繊維または連続ガラス繊維
の供給方法としては、この他にも以下の方法が考えられ
る。すなわち、小型の互いに逆方向に回転する各1対の
ロールによって、ガラス繊維を供給しながら、SMC製
造装置の幅方向にこの供給装置を往復させる、あるい
は、この供給装置をSMC製造装置の幅方向に複数個並
べることにより、樹脂層上にガラス繊維を散布させる方
法である。この場合のロールも、少なくとも一方が金属
あるいは硬質プラスチック製であることが、ガラス繊維
を滑ることなく引き出すうえで好ましい。The following methods are also conceivable as a method for supplying long glass fibers or continuous glass fibers. That is, the supply device is reciprocated in the width direction of the SMC manufacturing device while supplying glass fiber by a pair of small rolls rotating in opposite directions, or the supply device is moved in the width direction of the SMC manufacturing device. In this method, a plurality of glass fibers are scattered on the resin layer by arranging a plurality of glass fibers. In this case, it is preferable that at least one of the rolls is made of metal or hard plastic in order to pull out the glass fiber without slipping.
【0031】さらに、他の方法としては、高速空気流と
共にノズルからガラス長繊維または連続ガラス繊維を吹
き出しながら、このノズルをSMC製造装置の幅方向に
往復させるか、あるいはSMC製造装置の幅方向に複数
個のノズルを設けて樹脂組成物にガラス長繊維または連
続ガラス繊維を散布させてよい。Further, as another method, the nozzle is reciprocated in the width direction of the SMC manufacturing device while blowing glass long fiber or continuous glass fiber from the nozzle together with the high-speed air flow, or in the width direction of the SMC manufacturing device. A plurality of nozzles may be provided to spray long glass fibers or continuous glass fibers on the resin composition.
【0032】[0032]
【実施例】次に実施例および比較例を挙げて本発明をさ
らに具体的に説明する。下記の材料および方法を用い
て、表1に記載のようにそれぞれ製造条件を変えて実施
例および比較例のSMCを得た。Next, the present invention will be described more specifically with reference to examples and comparative examples. Using the following materials and methods, SMCs of Examples and Comparative Examples were obtained by changing the manufacturing conditions as shown in Table 1 respectively.
【0033】1.熱硬化性樹脂組成物 熱硬化性樹脂組成物(ペースト)としては、以下の成分
を以下の量比で混合した組成物を使用した。 ・不飽和ポリエステル樹脂(樹脂固形分約60重量%、スチレンモノマー約40 重量%) 78重量部 ・ポリスチレン溶液(ポリスチレン約30重量%、スチレンモノマー約70重量 %) 12重量部 ・顔料 5重量部 ・硬化剤(触媒、TBPB) 1重量部 ・離型剤(ステアリン酸亜鉛) 3重量部 ・充填剤(炭酸カルシウム) 100重量部 ・増粘剤(酸化マグネシウム) 0.6重量部1. Thermosetting resin composition As the thermosetting resin composition (paste), a composition obtained by mixing the following components in the following quantitative ratio was used. 78 parts by weight of unsaturated polyester resin (resin solid content: about 60% by weight, styrene monomer: about 40% by weight) 12 parts by weight of polystyrene solution (about 30% by weight of polystyrene, about 70% by weight of styrene monomer) 5 parts by weight of pigment 1 part by weight of curing agent (catalyst, TBPB) ・ 3 parts by weight of release agent (zinc stearate) ・ 100 parts by weight of filler (calcium carbonate) ・ 0.6 part by weight of thickener (magnesium oxide)
【0034】2.強化材としてのガラス繊維 強化材としてのガラス長繊維としては、フィラメント
径:11μm、番手:1084g/kmの連続ガラス繊
維を長さ:1000mmに切断したものを使用し、樹脂
層の両端部からはみ出さないようにして樹脂層の全幅に
わたって散布した。ガラス短繊維としては、フィラメン
ト径:13μm、番手:4800g/kgのガラスロー
ビングを長さ:25mmに切断したものを使用して、樹
脂層の両端部分の端縁から内側へ200mmまでの幅に
散布した。2. Glass Fiber as Reinforcing Material As continuous glass fiber as a reinforcing material, a continuous glass fiber having a filament diameter of 11 μm and a count of 1084 g / km cut into a length of 1000 mm is used and protrudes from both ends of the resin layer. It was sprayed over the entire width of the resin layer so as not to do so. As the short glass fiber, a glass roving having a filament diameter of 13 μm and a count of 4800 g / kg cut into a length of 25 mm is used, and is scattered inward from the edges at both ends of the resin layer to a width of 200 mm. did.
【0035】3.SMCの製造 (実施例1)図1に示す装置を用いて、幅1200mm
のポリエチレンフィルム6,8の内面に前記熱硬化性樹
脂組成物2,4による幅1000mm、厚み約1mmの
樹脂層を形成しつつ、フィルム8に形成した樹脂層の全
幅にわたって前記ガラス長繊維を散布し、樹脂層の両端
部分の端縁から内側に向けて200mmの幅に前記ガラ
ス短繊維を散布した。その後は図1に示すように常法に
従って、表1に示す単位面積当たりの重量およびガラス
繊維含有率の本発明のSMCを製造した。3. Example 1 Production of SMC (Example 1) Using the apparatus shown in FIG.
While forming a resin layer having a width of 1000 mm and a thickness of about 1 mm by the thermosetting resin compositions 2 and 4 on the inner surfaces of the polyethylene films 6 and 8, the glass long fibers are sprayed over the entire width of the resin layer formed on the film 8. Then, the short glass fibers were sprayed in a width of 200 mm inward from the edges of both ends of the resin layer. Thereafter, the SMC of the present invention having a weight per unit area and a glass fiber content shown in Table 1 was produced according to a conventional method as shown in FIG.
【0036】(実施例2)実施例1においてガラス短繊
維の散布量を変えた以外は実施例1と同様にして、表1
に示す単位面積当たりの重量およびガラス繊維含有率の
本発明のSMCを製造した。Example 2 The procedure of Example 1 was repeated, except that the amount of short glass fibers was changed.
The SMC of the present invention having a weight per unit area and a glass fiber content shown in Table 1 was produced.
【0037】(比較例1)実施例1においてガラス短繊
維の散布を樹脂層の全幅にわたって行なった以外は、実
施例1と同様にして、表1に示す単位面積当たりの重量
およびガラス繊維含有率の比較例のSMCを製造した。Comparative Example 1 The weight per unit area and the glass fiber content shown in Table 1 were obtained in the same manner as in Example 1 except that the short glass fibers were sprayed over the entire width of the resin layer. SMC of Comparative Example was manufactured.
【0038】(比較例2)実施例1においてガラス長繊
維の散布量を変え、かつガラス短繊維の散布を樹脂層の
全幅にわたって行なった以外は、実施例1と同様にし
て、表1に示す単位面積当たりの重量およびガラス繊維
含有率の比較例のSMCを製造した。 (比較例3)実施例1においてSMCの単位面積当たり
の重量およびガラス長繊維の散布量を変え、かつガラス
短繊維の散布を行なわなかった以外は、実施例1と同様
にして、表1に示す単位面積当たりの重量およびガラス
繊維含有率の比較例のSMCを製造した。(Comparative Example 2) Table 1 is shown in the same manner as in Example 1 except that the amount of long glass fiber was changed and the short glass fiber was sprayed over the entire width of the resin layer. Comparative SMCs of weight per unit area and glass fiber content were produced. (Comparative Example 3) Table 1 was prepared in the same manner as in Example 1 except that the weight per unit area of the SMC and the amount of long glass fibers were changed and the short glass fibers were not sprayed. Comparative SMCs of the indicated weight per unit area and glass fiber content were produced.
【0039】(比較例4)実施例1においてガラス短繊
維の散布を行なわなかった以外は、実施例1と同様にし
て、表1に示す単位面積当たりの重量およびガラス繊維
含有率の比較例のSMCを製造した。(Comparative Example 4) In the same manner as in Example 1, except that the short glass fibers were not sprayed, the weight per unit area and the glass fiber content of Comparative Examples shown in Table 1 were changed. SMC was manufactured.
【0040】4.SMCの成形 上記で得られたSMCの性能を調べるために、それぞれ
のSMCを1000×1000mmに裁断したものを、
実施例1、2、比較例1、2、4では4枚重ね、比較例
3では7枚重ねて、上型=135℃、下型=145℃の
金型へ装入して、成形圧力:100kg/cm2で加熱
加圧成形して評価用のサンプルとした。成形品の形状は
矩形の浅い箱型であり、成形品の厚みは4mmとした。4. Molding of SMC In order to examine the performance of the SMC obtained above, each SMC cut to 1000 × 1000 mm was
In Examples 1 and 2, and Comparative Examples 1, 2, and 4, four sheets were stacked, and in Comparative Example 3, seven sheets were stacked and charged into a mold having an upper mold of 135 ° C and a lower mold of 145 ° C. It was heated and pressed at 100 kg / cm 2 to obtain a sample for evaluation. The shape of the molded product was a rectangular shallow box shape, and the thickness of the molded product was 4 mm.
【0041】5.評価方法 SMCでのガラス繊維の含浸性(ガラス繊維への樹脂
の含浸度合い) カッターナイフを用いて、各SMCを厚さ方向の中央か
ら引き剥がし、その表面(引き剥がす前は内側だった
面)を目視によって観察し、ガラス繊維への樹脂の含浸
度合いを評価する。ガラス繊維が白く浮き出ている部分
は、樹脂が含浸していない部分なので、そのような部分
がある場合には「×(不良)」、無い場合には「○
(良)」と評価した。 SMCの端部の状態 SMCの端部からガラス繊維がはみ出しているか否かを
確認して、はみ出していない場合には「適正」とした。5. Evaluation method Impregnating property of glass fiber in SMC (degree of resin impregnation into glass fiber) Each SMC was peeled off from the center in the thickness direction using a cutter knife, and its surface (the surface that was inside before peeling) Is visually observed to evaluate the degree of impregnation of the glass fiber with the resin. The part where the glass fiber is raised white is the part that is not impregnated with the resin, so if there is such a part, “× (defective)”;
(Good). " State of the end of the SMC It was confirmed whether or not the glass fiber protruded from the end of the SMC.
【0042】成形品の外観 成形品が金型の形状通りに得られて、外観に欠点がない
場合には「○」と評価し、外観に欠点(膨れ、クラッ
ク、反り、波打ちなど)があったり、成形品の表面に光
沢が無い場合には「×」と評価した。 成形品の端部のクラック 矩形の浅い箱型である成形品の端部(箱型の開口部の外
周部分の縁の周辺)を目視で観察し、微細なクラック
(ヘアークラック)の有無を確認した。 成形品の曲げ強さ JIS K 7055に準拠した方法で測定した。上記
の評価結果を下記表1に示す。Appearance of Molded Article When the molded article was obtained according to the shape of the mold and had no defect in appearance, it was evaluated as “○”, and there was a defect (swelling, crack, warpage, wavy, etc.) in appearance. And when the surface of the molded article was not glossy, it was evaluated as “x”. Crack at the end of the molded product Visually observe the end of the rectangular shallow box-shaped molded product (around the edge of the outer periphery of the box-shaped opening) and check for the presence of minute cracks (hair cracks) did. Flexural strength of molded article Measured by a method based on JIS K 7055. The above evaluation results are shown in Table 1 below.
【0043】[0043]
【表1】 [Table 1]
【0044】上記表1から明らかであるように、実施例
1および2ではガラス含有率30〜40重量%で、含浸
不良のないSMCが得られたが、ガラス繊維の含有率が
両端部では適正であるが、中央部では高い比較例1で
は、SMCに含浸不良があり、成形品に膨れが発生し
た。また、全体的にガラス含有率を下げた比較例2で
は、含浸不良はないが、ガラス含有率が低いために、成
形品の強度が実施例に比べて低く目的の強度が得られな
かった。また、実施例2では良好なSMCが得られた
が、比較例3では、SMCの単位面積重量が低いため
に、端部のガラス含有率の低下が少なく良好なSMCが
得られるが、単位面積重量が低いことが成形作業におい
てSMCのチャージ枚数(プライ数)を増加させざるを
得ず、作業性に劣っている。また、実施例1および2で
は成形品の末端にヘアークラックは発生しなかったが、
比較例1および4では成形品末端にヘアークラックが発
生し、良好な成形品は得られなかった。As is clear from Table 1 above, in Examples 1 and 2, SMC having a glass content of 30 to 40% by weight and free from impregnation failure was obtained, but the glass fiber content was adequate at both ends. However, in Comparative Example 1 where the center was high, the impregnation failure was found in the SMC, and the molded product swelled. In Comparative Example 2 in which the glass content was lowered as a whole, there was no impregnation failure, but the strength of the molded product was lower than that of the example, and the desired strength could not be obtained because the glass content was low. Further, in Example 2, good SMC was obtained, but in Comparative Example 3, since the unit area weight of SMC was low, there was little decrease in the glass content at the end and good SMC was obtained. The low weight necessitates an increase in the number of charged SMCs (the number of plies) in the molding operation, resulting in poor workability. In Examples 1 and 2, hair cracks did not occur at the end of the molded product.
In Comparative Examples 1 and 4, hair cracks occurred at the end of the molded product, and good molded products could not be obtained.
【0045】[0045]
【発明の効果】以上の如き本発明によれば、SMCにお
いて、強化材の幅方向のはみ出しがなく、かつ強化材の
含有率がSMCの幅方向において実質的に同一であり、
クラックなどの欠陥が生じることなく優れた強度と強度
の均一性を有する成形品を与えるSMCを提供すること
ができる。また、SMC中のガラス繊維の単位面積当た
りの重量を向上させることができるので、成形品の端部
に髪の毛状のヘアークラックが発生することがなく、成
形品に優れた強度を与えることができる。According to the present invention as described above, the SMC does not protrude in the width direction of the reinforcing material, and the content of the reinforcing material is substantially the same in the width direction of the SMC.
The present invention can provide an SMC that provides a molded product having excellent strength and strength uniformity without generating defects such as cracks. Further, since the weight per unit area of the glass fiber in the SMC can be improved, hair-shaped hair cracks do not occur at the end of the molded product, and the molded product can be given excellent strength. .
【図1】 本発明のSMCの製造を説明する図。FIG. 1 is a diagram illustrating the manufacture of an SMC of the present invention.
【図2】 本発明のSMCの幅方向の断面を図解的に説
明する図。FIG. 2 is a diagram schematically illustrating a cross section in the width direction of the SMC of the present invention.
【図3】 本発明のSMCのガラス繊維の分散形態を図
解的に説明する図。FIG. 3 is a diagram schematically illustrating a dispersion form of glass fibers of the SMC of the present invention.
【図4】 従来のL−SMC中のガラス長繊維の分布を
説明する図。FIG. 4 is a view for explaining the distribution of long glass fibers in a conventional L-SMC.
【符号の説明】 1,3:樹脂タンク 2,4:熱硬化性樹脂組成物 5,7:ドクターナイフ 6,8:熱可塑性樹脂フィルム 9:ケーキ 10:連続ガラス繊維 11,16:ガラス繊維供給装置 12:連続ガラス繊維 13:カッターロール 14:ピンチロール 15:ロービング 17:ロービングカッター 18:ガラス短繊維 19:脱泡・含浸ロール 20:巻取ロール 21,31:ガラス短繊維 22,32:ガラス長繊維または連続ガラス繊維 23,33:SMC[Description of Signs] 1,3: Resin tank 2,4: Thermosetting resin composition 5,7: Doctor knife 6,8: Thermoplastic resin film 9: Cake 10: Continuous glass fiber 11,16: Supply glass fiber Apparatus 12: continuous glass fiber 13: cutter roll 14: pinch roll 15: roving 17: roving cutter 18: short glass fiber 19: defoaming / impregnating roll 20: winding roll 21, 31: short glass fiber 22, 32: glass Long fiber or continuous glass fiber 23,33: SMC
フロントページの続き (51)Int.Cl.7 識別記号 FI テーマコート゛(参考) B29K 105:08 B29K 105:08 309:08 309:08 (72)発明者 幾田 哲二 東京都千代田区神田鍛冶町3丁目6番地3 旭ファイバーグラス株式会社内 Fターム(参考) 4F072 AA02 AA04 AA07 AA09 AB09 AB33 AB34 AD05 AD13 AD23 AD38 AG03 AG15 AH20 AJ33 AK05 Continued on the front page (51) Int.Cl. 7 Identification FI FI Theme Court II (Reference) B29K 105: 08 B29K 105: 08 309: 08 309: 08 (72) Inventor Tetsuji Ikuda 3-chome, Kanda Kajicho, Chiyoda-ku, Tokyo 6F3 Asahi Fiberglass Co., Ltd. F term (reference) 4F072 AA02 AA04 AA07 AA09 AB09 AB33 AB34 AD05 AD13 AD23 AD38 AG03 AG15 AH20 AJ33 AK05
Claims (5)
材として配合し、増粘してなるシートモールディングコ
ンパウンド(SMC)において、SMCの全幅わたって
ガラス長繊維または連続ガラス繊維が無方向に分散さ
れ、かつSMCの全幅をXmmとした場合、幅方向の両
端部分には、該端縁から内側へ0.05×Xmm〜0.
3×Xmmまでの範囲の幅で、ガラス短繊維が分散され
ていることを特徴とするSMC。1. In a sheet molding compound (SMC) obtained by mixing glass fiber as a reinforcing material with a thermosetting resin composition and increasing viscosity, glass long fibers or continuous glass fibers are directed in a non-directional manner over the entire width of the SMC. When the entire width of the SMC is dispersed and the SMC is X mm, both ends in the width direction are 0.05 × X mm to 0.
SMC characterized in that short glass fibers are dispersed in a width of up to 3 × X mm.
mmであり、かつガラス短繊維の長さが5〜100mm
である請求項1に記載のSMC。2. The glass filament has a length of 500 to 4000.
mm, and the length of the short glass fiber is 5 to 100 mm.
The SMC of claim 1, wherein
維または連続ガラス繊維(A)と、ガラス短繊維(B)
とが、A:B=60〜95:40〜5の重量比である請
求項1または2に記載のSMC。3. A long glass fiber or a continuous glass fiber (A) and a short glass fiber (B) at both ends in the width direction.
The SMC according to claim 1 or 2, wherein A is a weight ratio of A: B = 60 to 95:40 to 5.
kg/m2である請求項1〜3の何れか1項に記載のS
MC。4. The weight per unit area of SMC is 2-8.
S according to any one of claims 1 to 3 is kg / m 2
MC.
たって実質的に同一である請求項1〜4の何れか1項に
記載のSMC。5. The SMC according to claim 1, wherein the content of the glass fibers is substantially the same over the entire width of the SMC.
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WO2023120091A1 (en) * | 2021-12-23 | 2023-06-29 | Dic株式会社 | Sheet molding compound and method for manufacturing same |
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KR102082764B1 (en) * | 2019-11-28 | 2020-04-27 | 주식회사 한국 에이씨엠 | SMC composite continuous molding apparatus using fiber dispersion supply unit and continuous molding method for manufacturing SMC composite |
KR102082771B1 (en) * | 2019-11-28 | 2020-04-27 | 주식회사 한국 에이씨엠 | SMC composite continuous molding apparatus using fiber dispersion supply unit and continuous molding method for manufacturing SMC composite |
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WO2023120091A1 (en) * | 2021-12-23 | 2023-06-29 | Dic株式会社 | Sheet molding compound and method for manufacturing same |
JP7468804B2 (en) | 2021-12-23 | 2024-04-16 | Dic株式会社 | Sheet molding compound and its manufacturing method |
CN114311732A (en) * | 2021-12-31 | 2022-04-12 | 江阴四方游泳康复产业股份有限公司 | Forming process of swimming pool wall plate |
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