JP5281549B2 - Non-woven fabric for FRP reinforcement - Google Patents
Non-woven fabric for FRP reinforcement Download PDFInfo
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- JP5281549B2 JP5281549B2 JP2009257983A JP2009257983A JP5281549B2 JP 5281549 B2 JP5281549 B2 JP 5281549B2 JP 2009257983 A JP2009257983 A JP 2009257983A JP 2009257983 A JP2009257983 A JP 2009257983A JP 5281549 B2 JP5281549 B2 JP 5281549B2
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- 239000004745 nonwoven fabric Substances 0.000 title claims abstract description 77
- 230000002787 reinforcement Effects 0.000 title claims description 14
- 239000011230 binding agent Substances 0.000 claims abstract description 53
- 239000000835 fiber Substances 0.000 claims abstract description 53
- 229920000139 polyethylene terephthalate Polymers 0.000 claims abstract description 50
- 239000005020 polyethylene terephthalate Substances 0.000 claims abstract description 50
- 230000003014 reinforcing effect Effects 0.000 claims abstract description 40
- 239000004925 Acrylic resin Substances 0.000 claims abstract description 24
- 229920000178 Acrylic resin Polymers 0.000 claims abstract description 24
- -1 polyethylene terephthalate Polymers 0.000 claims abstract description 10
- 238000002844 melting Methods 0.000 claims abstract description 6
- 230000008018 melting Effects 0.000 claims abstract description 6
- 229920005792 styrene-acrylic resin Polymers 0.000 claims abstract description 3
- 239000011347 resin Substances 0.000 claims description 35
- 229920005989 resin Polymers 0.000 claims description 35
- PPBRXRYQALVLMV-UHFFFAOYSA-N Styrene Chemical compound C=CC1=CC=CC=C1 PPBRXRYQALVLMV-UHFFFAOYSA-N 0.000 claims description 34
- XTXRWKRVRITETP-UHFFFAOYSA-N Vinyl acetate Chemical compound CC(=O)OC=C XTXRWKRVRITETP-UHFFFAOYSA-N 0.000 claims description 5
- 125000000391 vinyl group Chemical group [H]C([*])=C([H])[H] 0.000 claims description 2
- 229920002554 vinyl polymer Polymers 0.000 claims description 2
- 239000004744 fabric Substances 0.000 abstract 1
- 239000003365 glass fiber Substances 0.000 description 24
- 230000037303 wrinkles Effects 0.000 description 18
- 229920000728 polyester Polymers 0.000 description 15
- 238000000034 method Methods 0.000 description 14
- NIXOWILDQLNWCW-UHFFFAOYSA-N acrylic acid group Chemical group C(C=C)(=O)O NIXOWILDQLNWCW-UHFFFAOYSA-N 0.000 description 13
- 230000000903 blocking effect Effects 0.000 description 8
- 239000000839 emulsion Substances 0.000 description 8
- 238000010276 construction Methods 0.000 description 7
- 238000009787 hand lay-up Methods 0.000 description 7
- 239000003795 chemical substances by application Substances 0.000 description 6
- 230000000052 comparative effect Effects 0.000 description 6
- 239000006260 foam Substances 0.000 description 6
- 238000004519 manufacturing process Methods 0.000 description 6
- 239000000463 material Substances 0.000 description 6
- 238000000465 moulding Methods 0.000 description 6
- 229920000642 polymer Polymers 0.000 description 6
- 229920001567 vinyl ester resin Polymers 0.000 description 5
- 229920005822 acrylic binder Polymers 0.000 description 4
- 229920001577 copolymer Polymers 0.000 description 4
- 238000011156 evaluation Methods 0.000 description 4
- 239000012779 reinforcing material Substances 0.000 description 4
- 239000002002 slurry Substances 0.000 description 4
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 4
- 238000004804 winding Methods 0.000 description 4
- 238000005470 impregnation Methods 0.000 description 3
- 239000002904 solvent Substances 0.000 description 3
- RFVNOJDQRGSOEL-UHFFFAOYSA-N 2-hydroxyethyl octadecanoate Chemical compound CCCCCCCCCCCCCCCCCC(=O)OCCO RFVNOJDQRGSOEL-UHFFFAOYSA-N 0.000 description 2
- 229920000049 Carbon (fiber) Polymers 0.000 description 2
- PNEYBMLMFCGWSK-UHFFFAOYSA-N aluminium oxide Inorganic materials [O-2].[O-2].[O-2].[Al+3].[Al+3] PNEYBMLMFCGWSK-UHFFFAOYSA-N 0.000 description 2
- 229920006231 aramid fiber Polymers 0.000 description 2
- 230000015572 biosynthetic process Effects 0.000 description 2
- 239000004917 carbon fiber Substances 0.000 description 2
- 239000000306 component Substances 0.000 description 2
- 238000005520 cutting process Methods 0.000 description 2
- 230000001771 impaired effect Effects 0.000 description 2
- 239000012784 inorganic fiber Substances 0.000 description 2
- 238000003825 pressing Methods 0.000 description 2
- 239000002994 raw material Substances 0.000 description 2
- 239000012783 reinforcing fiber Substances 0.000 description 2
- 239000005368 silicate glass Substances 0.000 description 2
- 230000008719 thickening Effects 0.000 description 2
- 229920002748 Basalt fiber Polymers 0.000 description 1
- 229920002472 Starch Polymers 0.000 description 1
- 150000001336 alkenes Chemical class 0.000 description 1
- 239000004760 aramid Substances 0.000 description 1
- 230000037237 body shape Effects 0.000 description 1
- QHIWVLPBUQWDMQ-UHFFFAOYSA-N butyl prop-2-enoate;methyl 2-methylprop-2-enoate;prop-2-enoic acid Chemical compound OC(=O)C=C.COC(=O)C(C)=C.CCCCOC(=O)C=C QHIWVLPBUQWDMQ-UHFFFAOYSA-N 0.000 description 1
- 239000000919 ceramic Substances 0.000 description 1
- 230000008859 change Effects 0.000 description 1
- 239000000805 composite resin Substances 0.000 description 1
- 238000007796 conventional method Methods 0.000 description 1
- 239000008358 core component Substances 0.000 description 1
- 230000018044 dehydration Effects 0.000 description 1
- 238000006297 dehydration reaction Methods 0.000 description 1
- 230000003111 delayed effect Effects 0.000 description 1
- 238000011161 development Methods 0.000 description 1
- 239000002270 dispersing agent Substances 0.000 description 1
- 238000001035 drying Methods 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 230000007613 environmental effect Effects 0.000 description 1
- 238000010438 heat treatment Methods 0.000 description 1
- 238000010030 laminating Methods 0.000 description 1
- 238000003475 lamination Methods 0.000 description 1
- 239000007788 liquid Substances 0.000 description 1
- 238000010297 mechanical methods and process Methods 0.000 description 1
- 239000000155 melt Substances 0.000 description 1
- VNWKTOKETHGBQD-UHFFFAOYSA-N methane Chemical compound C VNWKTOKETHGBQD-UHFFFAOYSA-N 0.000 description 1
- JRZJOMJEPLMPRA-UHFFFAOYSA-N olefin Natural products CCCCCCCC=C JRZJOMJEPLMPRA-UHFFFAOYSA-N 0.000 description 1
- 239000010893 paper waste Substances 0.000 description 1
- 230000000704 physical effect Effects 0.000 description 1
- 230000008569 process Effects 0.000 description 1
- 238000012545 processing Methods 0.000 description 1
- 238000003672 processing method Methods 0.000 description 1
- 230000009467 reduction Effects 0.000 description 1
- 238000003892 spreading Methods 0.000 description 1
- 230000007480 spreading Effects 0.000 description 1
- 235000019698 starch Nutrition 0.000 description 1
- 239000008107 starch Substances 0.000 description 1
- 238000003756 stirring Methods 0.000 description 1
- 229920001187 thermosetting polymer Polymers 0.000 description 1
- 239000002699 waste material Substances 0.000 description 1
Landscapes
- Paper (AREA)
- Nonwoven Fabrics (AREA)
Abstract
Description
本発明は、無機繊維とＰＥＴ芯鞘バインダー繊維を含有するＦＲＰ補強用不織布に関する。 The present invention relates to a non-woven fabric for reinforcing FRP containing inorganic fibers and PET core-sheath binder fibers.
従来、高強度の繊維補強樹脂複合成型体（ＦＲＰ）を得るため、未硬化若しくは半硬化の樹脂に、補強材として高強度のガラス繊維・カーボン繊維・アラミド繊維等を主体として構成されたシート状の基材を積層・貼り合わせることにより、加圧ローラー等で樹脂を含浸し硬化させる一般的にハンドレイアップ成型と呼ばれる方法が広く採用されている。 Conventionally, in order to obtain a high-strength fiber-reinforced resin composite molded body (FRP), a sheet-shaped material mainly composed of high-strength glass fiber, carbon fiber, aramid fiber, etc. as a reinforcing material in an uncured or semi-cured resin In general, a method called hand lay-up molding, in which resin is impregnated with a pressure roller or the like and cured by laminating and bonding the base materials, is widely used.
このような強化繊維シート（基材）の形成に結合剤として使用されるバインダーについては、従来さまざまな検討がなされており、例えば特許文献１には、オレフィン系の芯鞘バインダー繊維を使用した補強用不織布が開示されている。 Various studies have been made on binders used as binders in the formation of such reinforcing fiber sheets (base materials). For example, Patent Document 1 discloses reinforcement using olefin-based sheath-core binder fibers. Nonwoven fabrics are disclosed.
また、特許文献２には、熱硬化性樹脂用硬化剤が付着してなる強化繊維が開示されている。 Patent Document 2 discloses a reinforcing fiber formed by adhering a curing agent for a thermosetting resin.
これらはいずれも、主に成型後のＦＲＰの強度を高めるための方法であり、ある一定の成果を上げている。 These are all methods mainly for increasing the strength of the FRP after molding, and have achieved certain results.
ところで、特許文献１に採用されている芯鞘構造の繊維状バインダーは、不織布用途として他用途にも広く使用されているが、不織布用バインダーとして強度を発現させるだけでなく、先ず鞘部の融点よりも低い温度で不織布を製造した後に型に押し込み、鞘部が溶融する温度より高い温度にさらすことで成型性に有用であることが特許文献３〜６に開示されている。 By the way, the fibrous binder having a core-sheath structure adopted in Patent Document 1 is widely used for other purposes as a nonwoven fabric application. It is disclosed in Patent Documents 3 to 6 that it is useful for moldability by producing a non-woven fabric at a lower temperature and then pressing it into a mold and exposing it to a temperature higher than the temperature at which the sheath part melts.
ＦＲＰでは、タンクなどの曲面から構成される成型体形状が少なくなく、これらの形状の成型体への補強材の施工方法としては、機械的な方法を採用するには複雑で、手作業で半硬化の樹脂を成型体に塗り、繊維シート（以下「ＦＲＰ補強用不織布」と言う）を乗せてローラー等で樹脂を繊維シートに浸み込ませる工法を採ることが多い。 In FRP, there are not a few molded body shapes composed of curved surfaces such as tanks, and as a method of applying a reinforcing material to a molded body of these shapes, it is complicated to adopt a mechanical method, and it is difficult to manually In many cases, a cured resin is applied to a molded body, a fiber sheet (hereinafter referred to as “FRP reinforcing nonwoven fabric”) is placed, and the resin is immersed in the fiber sheet with a roller or the like.
このような用途に使用される、ＦＲＰ補強用不織布は、必須特性として曲面への優れた沿型性・追従性が要求される。 The FRP reinforcing nonwoven fabric used for such applications is required to have excellent conformability and followability to curved surfaces as an essential characteristic.
そのため、ガラス長繊維を主体とし、ポリエステル系バインダーを使用した不織布が商品化されており、現在広く使用されている。ポリエステル系バインダーは、ＦＲＰに使用される樹脂の溶剤として一般的な、スチレンに良く溶解するため、半硬化樹脂に貼り付けた際、容易に強度を失い、曲面に追従し、なじみやすい。 Therefore, nonwoven fabrics mainly composed of long glass fibers and using polyester binders have been commercialized and are currently widely used. Polyester binders dissolve well in styrene, which is a common solvent for resins used in FRP. Therefore, when pasted on semi-cured resin, the polyester binder easily loses strength, follows a curved surface, and is easily adapted.
現在使用されている不織布は、曲面への追従性を考慮し、少量のポリエステル系バインダーを使用している。
しかし、これらの不織布は、ポリエステル系バインダーがブロッキングしやすいため、不織布を巻き取りにして保管する際、合紙が必要である。そのため、巻取りが大きくなってしまい、特に手作業で巻取りから必要な量の不織布を切り出す作業の負荷が大きい上、合い紙が廃棄物として大量に発生し、環境上問題となる。
Currently used nonwoven fabrics use a small amount of polyester binder in consideration of the ability to follow a curved surface.
However, since these polyester nonwoven fabrics are easily blocked by the polyester binder, slip sheets are required when the nonwoven fabric is wound and stored. For this reason, winding becomes large, and the load of the work of cutting out a necessary amount of nonwoven fabric from winding is particularly large, and a large amount of slip paper is generated as waste, which is an environmental problem.
また、樹脂に貼り付けた際の曲面施工性を重視するあまり、強度が不十分で腰が弱いため、使用寸法に裁断した基材の取り扱い作業、施工現場への取り回し作業において形状が変形したり、破損などの不具合が生じる事がある。 In addition, because the emphasis is on the ease of curved surface construction when pasted on resin, the strength is insufficient and the waist is weak, so the shape may be deformed in the handling work of the base material cut to the size used and the handling work to the construction site Failures such as damage may occur.
また、ハンドレイアップもしくはその他の成型方法で施工する際、シワになったり、樹脂の浸透が不均一になりやすく、作業に熟練を要する。 Moreover, when constructing by hand lay-up or other molding methods, wrinkles or resin permeation is likely to be uneven, and skill is required for the work.
また、バインダーのブロッキングに起因して、使用予定基材の定型裁断品を保管しておいた場合、抜き取る時の取り扱に時間がかかる。 In addition, due to the blocking of the binder, when the pre-cut base material of the base material to be used is stored, it takes time to handle it when it is extracted.
更に、ＦＲＰ補強用不織布の地合が不均一であるため、積層、含浸作業時に不織布が破れやすく、ポリエステル系バインダーの含有率を管理する事に高い熟練技術が必要であった。 Furthermore, since the formation of the FRP reinforcing nonwoven fabric is uneven, the nonwoven fabric is easily broken during lamination and impregnation operations, and high skill is required to control the content of the polyester binder.
そこで、この発明の目的は、保管する際に合い紙が必要なく、施工作業に必要十分な強度と腰を持ち、均一性に優れるＦＲＰ補強用不織布を提供することである。 Accordingly, an object of the present invention is to provide a non-woven fabric for reinforcing FRP that does not require an interleaf when storing, has sufficient strength and waist necessary for construction work, and is excellent in uniformity.
本発明者らは、ポリエチレンテレフタレート／変性ポリエチレンテレフタレート芯鞘構造バインダー（以下「ＰＥＴ芯鞘バインダー繊維」と記載する）を使用することにより、ブロッキングなどの問題が無く、しかもＦＲＰに使用される溶剤であるスチレンに接すると速やかに強度を失い、曲面に馴染みやすくなることを見出し、更に、ある一定の割合でＰＥＴ芯鞘バインダー繊維を含有する場合に限り、一定量のアクリルバインダーを使用しても、スチレンに接した場合速やかに強度を失い、しかも施工時の強度・腰は十分に強い不織布を製造できることを見出し本発明に到達した。 By using a polyethylene terephthalate / modified polyethylene terephthalate core-sheath structure binder (hereinafter referred to as “PET core-sheath binder fiber”), the present inventors have no problems such as blocking, and are solvents used for FRP. It is found that when it comes into contact with a certain styrene, it quickly loses its strength and becomes familiar with the curved surface, and even when it contains a PET core-sheath binder fiber at a certain ratio, even if a certain amount of acrylic binder is used, The present inventors have found that a nonwoven fabric that loses strength promptly when it comes into contact with styrene and that has a sufficiently strong strength and waist during construction can be produced.
芯鞘構造バインダー繊維は、前述のとおり、成型後の不織布の強度の向上に有用であること、或いは、型に押し込み、加熱成型する場合の成型性の向上に有用であることは公知であるが、スチレンなどの溶媒に接したときに溶解拡散し強度を失う性質をＦＲＰ補強用不織布に利用した技術は、これまで見出されていなかった。 As described above, the core-sheath binder fiber is known to be useful for improving the strength of the nonwoven fabric after molding, or useful for improving moldability when it is pressed into a mold and heat-molded. No technology has been found so far in which the non-woven fabric for reinforcing FRP has the property of dissolving and diffusing when in contact with a solvent such as styrene and losing strength.
前記の問題点を解決するために、本発明は以下の発明を包含する。 In order to solve the above problems, the present invention includes the following inventions.
（１）主体繊維とバインダー繊維、さらにアクリル樹脂、酢ビ・アクリル樹脂若しくはスチレン・アクリル樹脂から選択される樹脂を含有するＦＲＰ補強用不織布であって、該バインダー繊維が、ポリエチレンテレフタレートを芯とし、芯部よりも融点の低い変性ポリエチレンテレフタレートを鞘とする芯鞘バインダー繊維であり、該アクリル樹脂、酢ビ・アクリル樹脂若しくはスチレン・アクリル樹脂から選択される樹脂の含有量が不織布に対し１〜７質量％であり、且つ、芯鞘バインダー繊維の含有量が５〜２０質量％であることを特徴とするＦＲＰ補強用不織布。
（２）不織布が、湿式不織布である、請求項１に記載のＦＲＰ補強用不織布。
(1) An FRP reinforcing nonwoven fabric containing a main fiber and a binder fiber , and further a resin selected from acrylic resin, vinyl acetate / acrylic resin or styrene / acrylic resin , wherein the binder fiber has polyethylene terephthalate as a core, Ri sheath binder fibers der to the lower modified polyethylene terephthalate melting point and the sheath than the core portion, 1 content of resins selected from the acrylic resins, vinyl acetate-acrylic resins or styrene-acrylic resin to the nonwoven fabric A non-woven fabric for reinforcing FRP, characterized in that the content is 7% by mass and the content of the core-sheath binder fiber is 5-20% by mass .
(2) non-woven fabric is a wet-laid nonwoven fabric, FRP reinforcing nonwoven fabric according to claim 1.
本発明のＦＲＰ用補強材は、ＰＥＴ芯鞘バインダーを使用しているため、従来のポリエステル系バインダーを使用した不織布のようにブロッキングは発生しない。そのため、合い紙が不要であり、従来の合い紙を使用せざるを得なかったＦＲＰ補強材よりも巻取りを小さくできるので、手作業で巻取りから必要な量の不織布を切り出す作業の負荷が従来に比べて少なく、廃棄物である合い紙が発生しない。 Since the reinforcing material for FRP of the present invention uses a PET core-sheath binder, blocking does not occur unlike a non-woven fabric using a conventional polyester binder. For this reason, an interleaf is unnecessary, and the winding can be made smaller than the conventional FRP reinforcing material that had to use the interleaf. Therefore, the load of the work of manually cutting out the necessary amount of nonwoven fabric from the winding is increased. Compared to the conventional method, waste paper is not generated.
更に、適切な量のアクリルバインダーを使用することができるため、十分な強度と腰がある不織布とすることができる。そのため、使用寸法に裁断した機材の取り扱い作業、施工現場への取り回し作業において、形状が変形したり破損したりしにくい。 Furthermore, since an appropriate amount of an acrylic binder can be used, a nonwoven fabric with sufficient strength and stiffness can be obtained. For this reason, it is difficult for the shape to be deformed or damaged in handling work of equipment cut to use dimensions and handling work to the construction site.
また、ＰＥＴ芯鞘バインダー繊維のＦＲＰ補強用不織布への使用比率の変更、また使用比率が一定でも加工方法（製造過程での工程変更）により、最終的に用途・使用方法から要望される特性に微妙に対処が可能である。 In addition, changes in the usage ratio of PET core-sheath binder fibers to FRP-reinforced non-woven fabrics, and even if the usage ratio is constant, the processing method (process change in the manufacturing process) will eventually result in the desired characteristics from the application / use method It can be dealt with delicately.
更にある一定の割合でＰＥＴ芯鞘バインダー繊維を含有するものについて、一定量のアクリルバインダーを併用したものについては、最終的に用途・使用方法から要望される特性により適切な対処が可能である。 Furthermore, about what contains a PET core-sheath binder fiber in a certain fixed ratio, and what used a certain amount of acrylic binder together, it can respond appropriately by the characteristic finally requested | required from a use and a usage method.
鞘部は圧力の少ない状態で熱がかかると、繊維間の交点の接着面積が小さいため、ふんわりとして、それでいてそれなりの強度を持った製品が得られる。
このように製造されたＦＲＰ補強用不織布は、スチレンに接してから強度を失うまでの時間が短いため、より複雑な形状の成型にも優れた均一沿型性を持つ。そのため、三次元曲面が多く、凹凸を持つ物、つまりタンクの蓋など半球面状のもの、大型玩具、イベント成型物などに適する。
When heat is applied to the sheath in a state where the pressure is low, the bonding area at the intersection between the fibers is small, so that a product with a moderate strength can be obtained.
Since the FRP reinforcing nonwoven fabric manufactured in this way has a short time from contact with styrene until it loses strength, it has excellent uniform conformity even in molding of more complicated shapes. Therefore, it is suitable for objects having many three-dimensional curved surfaces and having irregularities, that is, hemispherical objects such as tank lids, large toys, and event moldings.
一方、ＰＥＴ芯鞘バインダー繊維の鞘部は、圧力の比較的大きい状態で熱がかかると、繊維間の交点の接着面積が大きくなるため、スチレンに接してから強度を失うまでの時間が長くなる。
このように製造されたＦＲＰ補強用不織布は、以下のような用途に適する。
すなわち、円筒形のＦＲＰを製造する場合などには、ハンドレイアップではなく、成型型を回転させながらＦＲＰ補強用不織布を巻きつける場合などもあるが、この様な場合、樹脂が浸透してすぐに強度を失うと、加工中にＦＲＰ補強用不織布が断紙してしまうため、ある程度の時間を経た後にＦＲＰ補強用不織布が強度を失うほうが好ましい。
このような場合、ＦＲＰ補強用不織布を製造する際、熱量を与えているときに、シートに圧力を加えることで、スチレンに接してから強度を失うまでの時間を長く調整したＦＲＰ補強用不織布が適する。
On the other hand, if the sheath of the PET core-sheath binder fiber is heated in a relatively high pressure state, the bonding area at the intersection between the fibers increases, so the time from contact with styrene until loss of strength is lengthened. .
The FRP reinforcing non-woven fabric produced in this way is suitable for the following uses.
That is, when manufacturing a cylindrical FRP, there is a case where the nonwoven fabric for reinforcing the FRP is wound while rotating the mold instead of the hand lay-up, but in such a case, the resin immediately penetrates. If the strength is lost, the non-woven fabric for reinforcing FRP breaks during processing. Therefore, it is preferable that the non-woven fabric for reinforcing FRP loses strength after a certain period of time.
In such a case, when manufacturing the non-woven fabric for reinforcing FRP, when the amount of heat is applied, by applying pressure to the sheet, the non-woven fabric for reinforcing FRP that has been adjusted to a long time from contact with styrene until loss of strength is obtained. Suitable.
すなわち、製造工程で加えられる熱量・圧力を調整することで、用途に適合したＦＲＰ補強用不織布を製造することができる。 In other words, by adjusting the amount of heat and pressure applied in the production process, it is possible to produce an FRP-reinforced non-woven fabric suitable for the application.
以下、本発明を更に詳細に説明する。 Hereinafter, the present invention will be described in more detail.
本発明で使用される主体繊維は、特に限定するものではないが、寸法安定性に優れる強度が高い繊維が適切である。例示するならば、アラミド繊維などのような高強度の有機繊維、ガラス繊維、カーボン繊維、セラミック繊維、バサルト繊維などの無機繊維が挙げられるが、一般的にはコストが比較的安価であり、寸法安定性に優れるガラス繊維が多く使用される。 The main fiber used in the present invention is not particularly limited, but a fiber having high strength and excellent dimensional stability is suitable. Examples include inorganic fibers such as high-strength organic fibers such as aramid fibers, glass fibers, carbon fibers, ceramic fibers, and basalt fibers. In general, the cost is relatively low, and the dimensions Many glass fibers having excellent stability are used.
本発明に使用されるＰＥＴ芯鞘バインダー繊維は、芯成分が通常のポリエステルであり、鞘成分にはポリエステルを変性することで通常のポリエステルよりも融点を低下させたものであれば特に限定されるものではない。一例として、ＰＥＴ芯鞘バインダー繊維の芯部融点が２３０℃で鞘部融点が１１０℃のものや、特許文献７に開示されているようなものが挙げられる。 The PET core-sheath binder fiber used in the present invention is particularly limited as long as the core component is a normal polyester and the sheath component has a melting point lower than that of a normal polyester by modifying the polyester. It is not a thing. As an example, the core melting point of the PET core-sheath binder fiber is 230 ° C., the sheath melting point is 110 ° C., and those disclosed in Patent Document 7.
本発明におけるＦＲＰ補強用不織布は、ＰＥＴ芯鞘バインダー繊維以外のバインダーも、要求される強度等の物性に応じて適宜使用することができる。ＰＥＴ芯鞘バインダー以外の繊維としては、ＥＶＡ樹脂、酢ビ・アクリル樹脂、アクリル樹脂、スチレン・アクリル樹脂などのエマルジョン、或いは粒状若しくは繊維状のＰＶＡ、液状のＰＶＡ、でんぷん等が挙げられる。これらのバインダーは、多量に添加するとスチレンへの溶解性が悪くなるため沿型性が損ねられる。そのため、添加量は必要最低量にとどめることが肝要である。 In the non-woven fabric for reinforcing FRP in the present invention, binders other than PET core-sheath binder fibers can be appropriately used according to the required physical properties such as strength. Examples of fibers other than the PET core-sheath binder include EVA resins, vinyl acetate / acrylic resins, acrylic resins, emulsions such as styrene / acrylic resins, or granular or fibrous PVA, liquid PVA, starch, and the like. When these binders are added in a large amount, the solubility in styrene is deteriorated, so that the conformability is impaired. Therefore, it is important to keep the amount added to the minimum necessary amount.
本発明において、ＰＥＴ芯鞘バインダー繊維以外のバインダーとして、アクリル樹脂が比較的スチレンへの溶解性を阻害しにくく、少量でも腰・強度が発現しやすいため、特に好適である。アクリル樹脂の種類は特に限定されるものではなく、一般的なアクリル酸エステル共重合体、酢酸ビニル・アクリル酸エステル共重合体、スチレン・アクリル酸エステル共重合体、アクリル酸エステルとメタクリル酸エステル、メタクリル酸ヒドロキシエステル共重合体などのエマルジョン等が好適である。
In the present invention, as a binder other than the PET core-sheath binder fiber, an acrylic resin is relatively suitable because it is relatively difficult to inhibit solubility in styrene, and even a small amount easily develops waist and strength. The type of acrylic resin is not particularly limited, and is a general acrylic ester copolymer, vinyl acetate / acrylic ester copolymer, styrene / acrylic ester copolymer, acrylic ester and methacrylate ester, Emulsions such as methacrylic acid hydroxy ester copolymers are preferred.
アクリル樹脂の含有量は、ＦＲＰ補強用不織布に対し１〜７質量％であり、且つ、ＰＥＴ芯鞘バインダー繊維の含有量が５〜２０質量％であることが好ましい。アクリル樹脂を含有させることにより、ＦＲＰ補強用不織布は腰と強度が増し、ハンドリングが容易になるが、アクリル樹脂の含有量が７質量％超えたり、ＰＥＴ芯鞘バインダーの含有量が５質量％に満たない場合、スチレンに接した場合に強度が失われず、沿型性が損なわれる。 The content of the acrylic resin is preferably 1 to 7% by mass with respect to the nonwoven fabric for reinforcing FRP, and the content of the PET core-sheath binder fiber is preferably 5 to 20% by mass. By including an acrylic resin, the nonwoven fabric for reinforcing FRP has increased waist and strength and is easy to handle. However, the acrylic resin content exceeds 7% by mass, and the PET core-sheath binder content reaches 5% by mass. If it is less, the strength is not lost when it comes into contact with styrene, and the conformality is impaired.
アクリル樹脂は、強度と腰の発現には有用であるが、スチレンへの溶解性に乏しいため、多量に添加すると沿型性が損なわれる。そのため、添加量は７質量％以下が適切である。７質量％を超える場合であっても、ＰＥＴ芯鞘バインダー繊維を５％以上含有すれば、十分な沿型性が得られる。しかし、ＰＥＴ芯鞘バインダー繊維の含有量が少ない場合、アクリル樹脂の添加量が７％以下であっても、スチレンに接した場合におけるＦＲＰ補強用不織布の強度低下が十分でないため、十分な沿型性が得られない。 Acrylic resin is useful for the development of strength and waist, but its solubility in styrene is poor. Therefore, the addition amount is suitably 7% by mass or less. Even when the content exceeds 7% by mass, sufficient conformity can be obtained if the PET core-sheath binder fiber is contained in an amount of 5% or more. However, when the content of the PET core-sheath binder fiber is small, even if the amount of acrylic resin added is 7% or less, the strength reduction of the non-woven fabric for reinforcing FRP when it comes into contact with styrene is not sufficient, Sex cannot be obtained.
一方、芯鞘バインダーの含有量が２０質量％を超えると、ＦＲＰを製造するための樹脂に多量のＰＥＴ芯鞘バインダー繊維の鞘部が溶け込む。ＰＥＴ芯鞘バインダー繊維の鞘部成分が多量に溶け込んだ樹脂は粘度が上昇し、ＦＲＰ製造時に発生する泡が抜けにくくなるという不具合が発生する。 On the other hand, when the content of the core-sheath binder exceeds 20% by mass, a large amount of the sheath part of the PET core-sheath binder fiber dissolves in the resin for producing FRP. The resin in which a large amount of the sheath component of the PET core-sheath binder fiber is dissolved has a problem that the viscosity is increased and bubbles generated during the production of FRP are difficult to escape.
本発明におけるＦＲＰ補強用不織布は、湿式抄紙法によって製造された、湿式不織布であることが、より好ましい。湿式不織布は、水に繊維を分散させ、水の粘度を適宜調整し、脱水速度をコントロールすることにより、乾式不織布等に比べ均一性に優れ、強度バラツキの少ないＦＲＰ補強用不織布を得ることができる。 The non-woven fabric for reinforcing FRP in the present invention is more preferably a wet non-woven fabric produced by a wet papermaking method. A wet nonwoven fabric can be obtained by dispersing fibers in water, adjusting the viscosity of water appropriately, and controlling the dehydration rate, thereby obtaining a nonwoven fabric for reinforcing FRP that is superior in uniformity and less in strength variation than a dry nonwoven fabric or the like. .
本発明のＦＲＰ補強用不織布は、長網抄紙機、短網抄紙機、傾斜ワイヤー型抄紙機等、既知の抄紙機を用いることによって可能である。 The nonwoven fabric for reinforcing FRP of the present invention can be obtained by using a known paper machine such as a long paper machine, a short paper machine, or an inclined wire type paper machine.
＜実施例＞
以下に実施例を挙げて本発明をより具体的に説明するが、勿論本発明はこれらによって限定されるものではない。なお、実施例において％とあるのは特に断わらない限り質量％を表す。
<Example>
EXAMPLES The present invention will be described more specifically with reference to the following examples. However, the present invention is not limited to these examples. In Examples,% means mass% unless otherwise specified.
＜実施例１＞
繊維長２５ｍｍ、繊維径１９μｍのアルミナ珪酸ガラス繊維（以下「ガラス繊維Ａ」と記す。）と、繊維長１３ｍｍ、繊維径１７μｍのアルミナ珪酸ガラス繊維（以下「ガラス繊維Ｂ」と記す。）と、繊維径２デニール、繊維長５ｍｍの芯鞘ＰＥＴ繊維（クラレ製 「Ｎ−７２０」、以下「芯鞘ＰＥＴ」と記す。）を水中に投入し、あらかじめ溶解した分散剤（花王製、「エマノーン３１９９」）を原料に対し０．５％となるよう添加し、攪拌して繊維を分散させ、１．０％濃度のガラス繊維スラリーを作成した。このスラリーを用いて湿式抄紙法でウエブを作成し、加熱加圧した後、アクリル樹脂エマルジョン（昭和高分子製、「ＡＧ−１００」、以下「アクリルＥｍ．」と記す。）を含浸法で添加し、過熱乾燥後、ＦＲＰ補強用不織布を製造した。
ガラス繊維Ａ３０％、ガラス繊維Ｂ４６％、芯鞘ＰＥＴ２２％、アクリルＥｍ．２％となるよう配合し製造した。
<Example 1>
An alumina silicate glass fiber (hereinafter referred to as “glass fiber A”) having a fiber length of 25 mm and a fiber diameter of 19 μm, an alumina silicate glass fiber (hereinafter referred to as “glass fiber B”) having a fiber length of 13 mm and a fiber diameter of 17 μm, A core-sheath PET fiber having a fiber diameter of 2 denier and a fiber length of 5 mm (“Kuraray“ N-720 ”, hereinafter referred to as“ core-sheath PET ”) was poured into water and dissolved in advance (Kao,“ Emanon 3199 ”). )) Was added to 0.5% with respect to the raw material, and stirred to disperse the fibers to prepare a 1.0% glass fiber slurry. Using this slurry, a web was prepared by wet papermaking, heated and pressurized, and then added with an acrylic resin emulsion (Showa Polymer, “AG-100”, hereinafter referred to as “acrylic Em.”) By an impregnation method. Then, after heating and drying, a nonwoven fabric for reinforcing FRP was produced.
Glass fiber A 30%, glass fiber B 46%, core sheath PET 22%, acrylic Em. Blended and manufactured to 2%.
＜実施例２＞
ガラス繊維Ｂ５８％、芯鞘ＰＥＴ５％、アクリルＥｍ．７％となるよう配合した以外は、実施例１と同様に製造した。
<Example 2>
Glass fiber B 58%, core-sheath PET 5%, acrylic Em. It was manufactured in the same manner as in Example 1 except that the content was 7%.
＜実施例３＞
ガラス繊維Ｂ６２％、芯鞘ＰＥＴ３％、アクリルＥｍ．５％となるよう配合した以外は、実施例１と同様に製造した。
<Example 3>
Glass fiber B 62%, core sheath PET 3%, acrylic Em. Manufactured in the same manner as in Example 1 except that the content was 5%.
＜実施例４＞
ガラス繊維Ｂ４３％、芯鞘ＰＥＴ２０％、アクリルＥｍ．７％となるよう配合した以外は、実施例１と同様に製造した。
<Example 4>
Glass fiber B 43%, core-sheath PET 20%, acrylic Em. It was manufactured in the same manner as in Example 1 except that the content was 7%.
＜実施例５＞
ガラス繊維Ｂ５０％、芯鞘ＰＥＴ２０％、アクリルＥｍ．１％となるよう配合した以外は、実施例１と同様に製造した。
<Example 5>
Glass fiber B 50%, core-sheath PET 20%, acrylic Em. It was manufactured in the same manner as in Example 1 except that the content was 1%.
＜実施例６＞
ガラス繊維Ｂ６４％、芯鞘ＰＥＴ５％、アクリルＥｍ．１％となるよう配合した以外は、実施例１と同様に製造した。
<Example 6>
Glass fiber B64%, core-sheath PET 5%, acrylic Em. It was manufactured in the same manner as in Example 1 except that the content was 1%.
＜実施例７＞
ガラス繊維Ｂ６０％、芯鞘ＰＥＴ５％、アクリルＥｍ．５％となるよう配合した以外は、実施例１と同様に製造した。
<Example 7>
Glass fiber B 60%, core sheath PET 5%, acrylic Em. Manufactured in the same manner as in Example 1 except that the content was 5%.
＜実施例８＞
ガラス繊維Ｂ４５％、芯鞘ＰＥＴ２０％、アクリルＥｍ．５％となるよう配合した以外は、実施例１と同様に製造した。
<Example 8>
Glass fiber B 45%, core-sheath PET 20%, acrylic Em. Manufactured in the same manner as in Example 1 except that the content was 5%.
＜実施例９＞
ガラス繊維Ｂ６１％、芯鞘ＰＥＴ８％、アクリルＥｍ．の変わりに酢ビ・アクリルエマルジョン（日本合成化学製、「モビニール７８０Ａ」）を１％となるよう配合した以外は、実施例１と同様に製造した。
<Example 9>
Glass fiber B61%, core-sheath PET 8%, acrylic Em. It was manufactured in the same manner as in Example 1 except that vinyl acetate / acrylic emulsion (manufactured by Nippon Synthetic Chemical Co., Ltd., “Movinyl 780A”) was blended to 1%.
＜実施例１０＞
ガラス繊維Ｂ６１％、芯鞘ＰＥＴ８％、アクリルＥｍ．の変わりにスチレン・アクリル樹脂エマルジョン（日本合成化学製、「モビニール１７５２」）を１％となるよう配合した以外は、実施例１と同様に製造した。
<Example 10>
Glass fiber B61%, core-sheath PET 8%, acrylic Em. A styrene / acrylic resin emulsion (manufactured by Nippon Synthetic Chemical Co., Ltd., “Movinyl 1752”) was prepared in the same manner as in Example 1 except that it was mixed to 1%.
＜比較例１＞
ガラス繊維Ａと、ガラス繊維Ｂを水中に投入し、あらかじめ溶解した分散剤（花王製、「エマノーン３１９９」）を原料に対し０．５％となるよう添加し、攪拌して繊維を分散させ、１．０％濃度のガラス繊維スラリーを作成した。この際、芯鞘ＰＥＴバインダーは使用しなかった。
このスラリーを用いて湿式抄紙法でウエブを作成し、加熱加圧した後、水溶性ポリエステルエマルジョン（互応化学工業製、「プラスコートＺ−８８０」）を含浸法で添加し、過熱乾燥後、ＦＲＰ補強用不織布を製造した。
ガラス繊維Ａ３０％、ガラス繊維Ｂ６０％、水溶性ポリエステル・エマルジョンが１０％の配合となるように製造した。
<Comparative Example 1>
Glass fiber A and glass fiber B are poured into water, a pre-dissolved dispersant (manufactured by Kao, “Emanon 3199”) is added to 0.5% with respect to the raw material, and the fiber is dispersed by stirring. A 1.0% concentration glass fiber slurry was prepared. At this time, the core-sheath PET binder was not used.
Using this slurry, a web was prepared by wet papermaking, heated and pressurized, and then a water-soluble polyester emulsion (manufactured by Kyoyo Chemical Co., Ltd., “Plus Coat Z-880”) was added by an impregnation method. A reinforcing nonwoven fabric was produced.
Manufactured such that 30% glass fiber, 60% glass fiber, and 10% water-soluble polyester emulsion were blended.
＜比較例２＞
ガラス繊維Ｂ６７％、水溶性ポリエステル・エマルジョンの変わりにアクリルＥｍ．３％となるよう配合した以外は比較例１と同様に製造した。
<Comparative example 2>
Instead of glass fiber B67%, water-soluble polyester emulsion, acrylic Em. Manufactured in the same manner as Comparative Example 1 except that the content was 3%.
実施例及び比較例の評価結果を表１及び表２に示す。
実施例はいずれも、シートを、合い紙無しで重ねておいてもブロッキングが発生しなかった。
また、１ｍ角程度の大きさのＦＲＰ補強用不織布を手作業で運んだり、広げたりする際に変形・破れが発生しにくく、更に、球面や円筒面などの曲面への沿型性に優れ、施工時にシワが発生しにくい。
また、半硬化のＦＲＰ補強用樹脂に施工する際、樹脂とＦＲＰ補強用不織布の間に発生する泡抜けにも問題がない。
また、ＰＥＴ芯鞘バインダーを２２％配合した実施例１は、ＦＲＰ用樹脂の増粘により、泡抜けが若干遅くなる傾向は認められたが、実用上問題になるほどではなかった。
その他の実施例では、ＦＲＰ用樹脂の増粘により泡抜けが遅くなる傾向は認められないか、認められたとしても僅かであり実用上問題となることはなかった。
The evaluation results of Examples and Comparative Examples are shown in Table 1 and Table 2.
In all of the examples, blocking did not occur even when the sheets were stacked without an interleaf.
In addition, deformation and tearing are less likely to occur when manually carrying or spreading a non-woven fabric for reinforcing FRP with a size of about 1 m square, and it has excellent conformability to curved surfaces such as spherical surfaces and cylindrical surfaces. Wrinkles are unlikely to occur during construction.
In addition, when applying to a semi-cured FRP reinforcing resin, there is no problem with bubble removal generated between the resin and the FRP reinforcing nonwoven fabric.
Further, in Example 1 in which 22% of the PET core / sheath binder was blended, the tendency of the bubble removal to be slightly delayed due to the thickening of the resin for FRP was recognized, but this was not a problem in practical use.
In other examples, there was no tendency to slow down bubble removal due to thickening of the resin for FRP, or even if it was recognized, there was little problem and there was no practical problem.
一方、比較例１のようにＰＥＴ芯鞘バインダーを使用せず、水溶性ポリエステルバインダーを使用した場合、ＦＲＰ補強用シートを合い紙を使用しないで重ねておいておくと、ブロッキング（シート同士がくっついてしまう現象）が発生したため、１枚を剥がし取る際に破れが発生し、使用不能となった。そのため、合い紙を使用しない限り、このＦＲＰ補強用不織布は使用できなかった。
また、１ｍ角程度の大きさのＦＲＰ補強用不織布を手作業で運んだり、広げたりする際、実施例と比較して、変形・破れが発生しやすかった。
On the other hand, when the PET core-sheath binder is not used as in Comparative Example 1 and the water-soluble polyester binder is used, if the FRP reinforcing sheets are stacked without using the interleaf, blocking (sheets stick to each other) Phenomenon) occurred, and tearing occurred when one piece was peeled off, making it unusable. For this reason, this non-woven fabric for reinforcing FRP could not be used unless interleaving paper was used.
In addition, when a nonwoven fabric for reinforcing FRP having a size of about 1 square meter was manually carried or spread, deformation and tearing were more likely to occur compared to the examples.
また、比較例２のようにＰＥＴ芯鞘バインダーを使用せず、アクリルバインダーのみでＦＲＰ補強用不織布を製造した場合、ＦＲＰ樹脂に接触してもＦＲＰ補強用不織布が強度を失わず、曲面への沿型性に劣り、曲面施工時にシワが発生した。 Moreover, when the nonwoven fabric for FRP reinforcement is manufactured only with an acrylic binder without using a PET core-sheath binder as in Comparative Example 2, the nonwoven fabric for FRP reinforcement does not lose its strength even when it comes into contact with the FRP resin. It was inferior in conformity, and wrinkles occurred during curved surface construction.
（評価方法）
＜シートを重ねて置いた場合のブロッキングの発生＞
ＦＲＰ補強用不織布を１ｍ角に切断し、合い紙を挟まずに２０枚重ねて気温３０℃の部屋に２時間放置した後、ＦＲＰ補強用不織布を上から１枚ずつ取り上げた。
その際、全て１枚１枚バラバラに取り上げられた場合、「ブロッキング発生無し」と評価し、ＦＲＰ補強用不織布同士がくっついている、又はくっついていて１枚を剥がし取る際に破れが発生した場合を「ブロッキング発生」と評価した。
(Evaluation method)
<Occurrence of blocking when sheets are stacked>
The nonwoven fabric for reinforcing FRP was cut into 1 m squares, stacked with 20 sheets without sandwiching interleaf paper, and left in a room at a temperature of 30 ° C. for 2 hours, and then the nonwoven fabric for reinforcing FRP was picked up one by one from the top.
At that time, when all the sheets are taken apart one by one, it is evaluated that there is no blocking, and the non-woven fabric for FRP reinforcement is stuck together, or when tearing occurs when one piece is peeled off Was evaluated as “blocking occurrence”.
＜ＦＲＰ補強用不織布取り扱い時の変形・破断の発生しにくさ＞
１ｍ角に裁断したＦＲＰ補強用不織布を作業者２名で広げてシワを伸ばし、運搬する作業を行った際の変形・破断の起こしやすさを
＜変形・破断が起こりにくい＞◎、○、△、×、××、＜変形・破断が起こりやすい＞
の５段階で評価した。
<Difficult to deform / break when handling non-woven fabric for FRP reinforcement>
Spread the non-woven fabric for FRP reinforcement cut to 1m square with two workers, stretch the wrinkles, and improve the ease of deformation / breakage when carrying the work <deformation / breakage is less likely> ◎, ○, △ , ×, XX, <deformable / breakable>
It was evaluated in five stages.
＜タンクの蓋（半球面状）への沿型性＞
半球状の型にＰＥＴ製剥離シートを貼り、その上にＦＲＰ用樹脂半球状の型にＰＥＴ製剥離シートを貼り、その上にＦＲＰ用樹脂（６％Ｃｏ−Ｎａｐｈ．入りビス系ビニルエステル （昭和高分子（株）：リポキシ Ｒ８０６ Ｂ） １００ｐｈｒ硬化剤 （５５％−ＭＥＫＰＯ）０．７ ｐｈｒ）を塗布した。
その樹脂に、ハンドレイアップ工法でＦＲＰ補強用不織布を施工し、その際、ＦＲＰ補強用不織布が速やかに強度を失い型になじんだものを◎（良）、強度を失いにくく、型になじみにくいものを××（悪）として、
＜型へなじみやすい＞◎、○、△、×、××＜型へなじみにくい＞の５段階で評価した。
<Conformity to tank lid (hemispherical shape)>
A PET release sheet is affixed to a hemispherical mold, a PET release sheet is affixed to the FRP resin hemispherical mold, and a FRP resin (bis vinyl ester containing 6% Co-Naph. (Showa) Polymer Co., Ltd .: Lipoxy R806 B) 100 phr curing agent (55% -MEKPO) 0.7 phr) was applied.
A non-woven fabric for FRP reinforcement is applied to the resin by the hand lay-up method. At that time, the non-woven fabric for FRP reinforcement quickly loses its strength and becomes familiar with the mold. Make things xx (evil),
<Familiar to mold> A, O, Δ, X, XX <Familiar with mold> was evaluated in five levels.
＜タンクの蓋（半球面状）に施工した場合のシワの発生のしにくさ＞
半球状の型にＰＥＴ製剥離シートを貼り、その上にＦＲＰ用樹脂半球状の型にＰＥＴ製剥離シートを貼り、その上にＦＲＰ用樹脂（６％Ｃｏ−Ｎａｐｈ．入りビス系ビニルエステル （昭和高分子製：リポキシ Ｒ８０６ Ｂ） １００ｐｈｒ硬化剤 （５５％−ＭＥＫＰＯ）０．７ ｐｈｒ）を塗布した。
その樹脂に、ハンドレイアップ工法でＦＲＰ補強用不織布を施工し、その際のシワの発生のしにくさを、
＜良＞容易にシワ無く施工できた、
↓
シワを伸ばすため、何度もローラーでこすらなければならなかったもの
↓
＜悪＞ハンドレイアップ工法ではシワが解消できなかったものとして評価し、
＜しわが発生しにくい＞◎、○、△、×、××＜しわが発生しやすい＞の５段階で評価した。
<Difficult to generate wrinkles when applied to tank lid (hemispherical shape)>
A PET release sheet is affixed to a hemispherical mold, a PET release sheet is affixed to the FRP resin hemispherical mold, and a FRP resin (bis vinyl ester containing 6% Co-Naph. (Showa) Polymer: Lipoxy R806 B) 100 phr curing agent (55% -MEKPO) 0.7 phr) was applied.
To the resin, apply a non-woven fabric for FRP reinforcement by the hand lay-up method, and make it difficult for wrinkles to occur.
<Good> Easily constructed without wrinkles,
↓
What had to be rubbed with rollers many times to stretch out wrinkles
↓
<Evil> The hand lay-up method was evaluated as a wrinkle that could not be resolved.
<Wrinkle is unlikely to occur> The evaluation was made in five stages: ◎, ○, Δ, ×, XX <Wrinkle is likely to occur>.
＜パイプ（円筒形）への沿型性＞
パイプ状の型の表面にＰＥＴ剥離シートを巻き、その上にＦＲＰ用樹脂（６％Ｃｏ−Ｎａｐｈ．入りビス系ビニルエステル （昭和高分子製：リポキシ Ｒ８０６ Ｂ） １００ｐｈｒ硬化剤 （５５％−ＭＥＫＰＯ）０．７ ｐｈｒ）を塗布した。
その状態で、パイプ状の型を回転させることによってＦＲＰ補強用不織布をパイプ表面に施工した。
その際、ＦＲＰ補強用不織布が速やかに型になじんだものを◎（良）、型になじむのに時間がかかり、生産効率の低いもの、或いは型になじまなかったものを××（悪）として、型へのなじみやすさを
＜型へなじみやすい＞◎、○、△、×、××＜型へなじみにくい＞の５段階で評価した。
<Conformity to pipe (cylindrical)>
A PET release sheet is wound around the surface of a pipe-shaped mold, and a FRP resin (bis-vinyl ester containing 6% Co-Naph. (Showa Polymer: Lipoxy R806 B)) 100 phr curing agent (55% -MEKPO) 0.7 phr) was applied.
In this state, a non-woven fabric for FRP reinforcement was applied to the pipe surface by rotating the pipe-shaped mold.
At that time, the FRP reinforcing nonwoven fabric quickly conforms to the mold as ◎ (good), it takes time to adapt to the mold, the production efficiency is low, or the one that did not conform to the mold as xx (bad) The ease of fitting into the mold was evaluated in five levels: <easy to fit into the mold> ◎, ○, Δ, ×, xx <not easy to fit into the mold>.
＜パイプ（円筒形）に施工した場合のシワの発生のしにくさ＞
パイプ状の型の表面にＰＥＴ剥離シートを巻き、その上にＦＲＰ用樹脂（６％Ｃｏ−Ｎａｐｈ．入りビス系ビニルエステル （昭和高分子製：リポキシ Ｒ８０６ Ｂ） １００ｐｈｒ硬化剤 （５５％−ＭＥＫＰＯ）０．７ ｐｈｒ）を塗布した。
その状態で、パイプ状の型を回転させることによってＦＲＰ補強用不織布をパイプ表面に施工した。
その際、ＦＲＰ補強用不織布にシワが発生しないもの、或いはシワが発生しても僅かにローラーでこする程度でシワが解消されたものを◎（良）、シワが発生しやすく、ローラーで何度もこすらなければシワが解消しないもの、或いはローラーでこすってもシワが解消しないものを××（悪）として、
＜しわが発生しにくい＞◎、○、△、×、××＜しわが発生しやすい＞の５段階で評価した。
<Difficult to generate wrinkles when constructed on a pipe (cylindrical)>
A PET release sheet is wound around the surface of a pipe-shaped mold, and a FRP resin (bis-vinyl ester containing 6% Co-Naph. (Showa Polymer: Lipoxy R806 B)) 100 phr curing agent (55% -MEKPO) 0.7 phr) was applied.
In this state, a non-woven fabric for FRP reinforcement was applied to the pipe surface by rotating the pipe-shaped mold.
At that time, FRP reinforcing non-woven fabric that does not wrinkle, or wrinkle that has been eliminated by wrinkling slightly with a roller is ◎ (good). If the wrinkle does not disappear if it is not rubbed again, or if the wrinkle does not disappear even if it is rubbed with a roller,
<Wrinkle is unlikely to occur> The evaluation was made in five stages: ◎, ○, Δ, ×, XX <Wrinkle is likely to occur>.
＜樹脂の泡の抜けやすさ（脱泡性）＞
半球状の型にＰＥＴ製剥離シートを貼り、その上にＦＲＰ用樹脂半球状の型にＰＥＴ製剥離シートを貼り、その上にＦＲＰ用樹脂（６％Ｃｏ−Ｎａｐｈ．入りビス系ビニルエステル （昭和高分子製：リポキシ Ｒ８０６ Ｂ） １００ｐｈｒ硬化剤 （５５％−ＭＥＫＰＯ）０．７ ｐｈｒ）を塗布した。
その樹脂に、ハンドレイアップ工法でＦＲＰ補強用不織布を施工し、その際に発生した泡が速やかに抜けたものを◎、樹脂が増粘して、泡抜けが遅くなり、泡を除去するためにローラーで何度もこすらなければならなかったもの、或いはローラー等でこすっても泡が除去できなかったものを××として、
泡の抜けやすさを
＜泡が抜けやすい＞◎、○、△、×、××＜泡が抜けにくい＞の５段階で評価した。
<Ease of removal of resin foam (defoaming property)>
A PET release sheet is affixed to a hemispherical mold, a PET release sheet is affixed to the FRP resin hemispherical mold, and a FRP resin (bis vinyl ester containing 6% Co-Naph. (Showa) Polymer: Lipoxy R806 B) 100 phr curing agent (55% -MEKPO) 0.7 phr) was applied.
In order to remove the foam, the resin is thickened and the foam removal slows down by applying a non-woven fabric for FRP reinforcement to the resin by the hand lay-up method. XX is the one that had to be rubbed many times with a roller, or that the foam could not be removed by rubbing with a roller etc.
The ease of foam removal was evaluated in five levels: <Ease of foam removal> A, O, Δ, X, XX <Bubble is difficult to escape>.
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| JP6179326B2 (en) * | 2013-09-30 | 2017-08-16 | 王子ホールディングス株式会社 | Non-woven fabric for fiber reinforced plastic reinforcement |
| JP6369287B2 (en) * | 2013-10-28 | 2018-08-08 | 王子ホールディングス株式会社 | Fiber reinforced plastic sheet |
| JP6493147B2 (en) * | 2014-10-20 | 2019-04-03 | 王子ホールディングス株式会社 | Nonwoven fabric, method for producing nonwoven fabric, and fiber-reinforced plastic molded body |
| KR101646455B1 (en) * | 2015-04-03 | 2016-08-08 | (주)엘지하우시스 | Porous fiber reinforced composite material and method for preparing the same |
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| JP6528824B2 (en) * | 2017-10-06 | 2019-06-12 | 王子ホールディングス株式会社 | Sheet for fiber-reinforced plastic molding and fiber-reinforced plastic molding |
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