JPS59225911A - Manufacture of matted resin molding - Google Patents
Manufacture of matted resin moldingInfo
- Publication number
- JPS59225911A JPS59225911A JP58100905A JP10090583A JPS59225911A JP S59225911 A JPS59225911 A JP S59225911A JP 58100905 A JP58100905 A JP 58100905A JP 10090583 A JP10090583 A JP 10090583A JP S59225911 A JPS59225911 A JP S59225911A
- Authority
- JP
- Japan
- Prior art keywords
- polyvinyl alcohol
- mold
- filler
- parts
- resin
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Pending
Links
Classifications
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
- B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
- B29C33/00—Moulds or cores; Details thereof or accessories therefor
- B29C33/42—Moulds or cores; Details thereof or accessories therefor characterised by the shape of the moulding surface, e.g. ribs or grooves
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
- B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
- B29C33/00—Moulds or cores; Details thereof or accessories therefor
- B29C33/56—Coatings, e.g. enameled or galvanised; Releasing, lubricating or separating agents
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
- B29K—INDEXING SCHEME ASSOCIATED WITH SUBCLASSES B29B, B29C OR B29D, RELATING TO MOULDING MATERIALS OR TO MATERIALS FOR MOULDS, REINFORCEMENTS, FILLERS OR PREFORMED PARTS, e.g. INSERTS
- B29K2995/00—Properties of moulding materials, reinforcements, fillers, preformed parts or moulds
- B29K2995/0018—Properties of moulding materials, reinforcements, fillers, preformed parts or moulds having particular optical properties, e.g. fluorescent or phosphorescent
- B29K2995/0024—Matt surface
Landscapes
- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Moulds For Moulding Plastics Or The Like (AREA)
- Moulding By Coating Moulds (AREA)
- Shaping Of Tube Ends By Bending Or Straightening (AREA)
Abstract
Description
【発明の詳細な説明】
本発明は表面光沢の少ない艶消し成形品の製造方法に関
するものである。DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a method for producing a matte molded article with low surface gloss.
従来、不飽和ポリエステル樹脂を用いたＦＲＰやレジン
コンクリート成形品を製造する際、美観や耐候性、耐薬
品性を必要とする成形品ではゲルコートを表面層として
形成させることが一般的である。かかる成形品は通常光
沢のある表面平滑な面を有するが、デザイン上あるいは
光学的な見地から、艷のない成形品が求められる場合が
ある。Conventionally, when manufacturing FRP or resin concrete molded products using unsaturated polyester resin, it is common to form a gel coat as a surface layer for molded products that require good appearance, weather resistance, and chemical resistance. Such molded products usually have a glossy and smooth surface, but from a design or optical standpoint, molded products without ribs are sometimes required.
この艶消し成形品を製造する方法としては、従来、型の
面をサンドブラスト法で粗面とした型を用いる方法があ
った。即ち粗くした型面にゲルコートの塗布、裏打ち層
の積層の順序で成形、硬化させた後、脱型して、艶消し
樹脂成形品を得る方法が一般的であった。しかし、この
方法では型を作製する際に最終仕上げ工程でサンドブラ
ストする必要があり、しかも型面が粗く、平滑性を失う
為、離型性に劣るという欠点がある。又、同一成形型で
光沢のある成形品を得たい時には再度型面を磨（必要が
あり、非常に不便であった。Conventionally, a method for manufacturing this matte molded product has been to use a mold whose surface has been roughened by sandblasting. That is, the general method was to apply a gel coat to a roughened mold surface, stack a backing layer, and then mold and cure, followed by demolding to obtain a matte resin molded product. However, this method requires sandblasting in the final finishing step when producing the mold, and the mold surface is rough and loses smoothness, resulting in poor mold releasability. Furthermore, if you want to obtain a glossy molded product using the same mold, it is necessary to polish the mold surface again, which is extremely inconvenient.
本発明者は、艶消し樹脂成形品の従来製造方法がもつ、
これらの種々の欠点を改良すべく鋭意検討した結果、成
形型表面にポリビニルアルコール溶液と充填剤とからな
る配合物を塗布することにより、艶消し樹脂成形品が容
易に得られることを見出し、本発明を完成するに至った
。The present inventor has discovered that the conventional manufacturing method of matte resin molded products has
As a result of intensive studies to improve these various drawbacks, we discovered that matte resin molded products can be easily obtained by applying a compound consisting of a polyvinyl alcohol solution and a filler to the surface of the mold, and we have developed this book. The invention was completed.
すなわち本発明は、成形型表面にポリビニルアルコール
溶液と充填剤とからなる配合物を塗布し、乾燥した後、
熱硬化性樹脂を用いて成形することを特徴とする艶消し
樹脂成形品の製造方法を提供するものである。That is, in the present invention, a mixture consisting of a polyvinyl alcohol solution and a filler is applied to the surface of the mold, and after drying,
The present invention provides a method for manufacturing a matte resin molded product, which is characterized by molding using a thermosetting resin.
本発明の方法によれば、型は一般的な平滑で光沢のある
型を使用し、サンドブラスト等の型の粗面化処理をする
ことなく、光沢のある成形品と艶消しの成形品とを交互
に成形することも可能であり、経済的である。更に本発
明に使用するポリビニルアルコールは乾燥して金型表面
に薄いフィルムを形成するものであり、離型効果に優れ
るものである。しかも成形後、該フィルムは水洗により
容易に溶出するものであり、成形型及び成形品には何ら
悪影響を及ぼすことはない。According to the method of the present invention, a general smooth and glossy mold is used, and a glossy molded product and a matte molded product can be produced without roughening the mold such as sandblasting. It is also possible and economical to mold them alternately. Furthermore, the polyvinyl alcohol used in the present invention dries to form a thin film on the surface of the mold, and has an excellent mold release effect. Furthermore, after molding, the film is easily eluted by washing with water, and does not have any adverse effect on the mold or the molded product.
本発明に使用するポリビニルアルコール溶液としては、
ケン化度が５０モル％以上で、重合度が３００〜３００
゜のポリビニルアルコールを、水、低級アルコール、酢
酸エチル等の単独又は混合溶剤に溶かした溶液が適当で
あり、その固型分濃度は通常５〜７０重量％、好ましく
は１０〜５００〜５０重量。固型分が７０重重量を超え
ると分子量の大きいポリビニルアルコールでは溶液粘度
が高くなり、均一な塗膜を得ることが難しく、固型分が
５重量％未満では塗膜厚が薄くなり、フィルムが破れ易
くなるので好ましくない。The polyvinyl alcohol solution used in the present invention includes:
Saponification degree is 50 mol% or more, polymerization degree is 300-300
A solution prepared by dissolving polyvinyl alcohol of 0.2°C in a single or mixed solvent such as water, lower alcohol, or ethyl acetate is suitable, and the solid content concentration thereof is usually 5 to 70% by weight, preferably 10 to 500 to 50% by weight. When the solid content exceeds 70% by weight, the solution viscosity becomes high with polyvinyl alcohol having a large molecular weight, making it difficult to obtain a uniform coating, while when the solid content is less than 5% by weight, the coating thickness becomes thin and the film becomes thin. This is not preferable because it tends to tear easily.
本発明に使用する充填剤としては、従来公知のプラスチ
ック用充填剤がいずれも使用できる。例えばシリカ、タ
ルク、クレー、マイカ、アルミナ、炭酸カルシウム、水
酸化アルミニウム、硫酸バリウム等が挙げられ、なかで
もシリカ、タルク、クレーが好ましい。充填剤の粒径は
特に限定されないが、通常平均粒径０．００１〜１００
μｍ１好ましくは０．００５〜５０μｍのものの中から
任意に選択される。As the filler used in the present invention, any conventionally known filler for plastics can be used. Examples include silica, talc, clay, mica, alumina, calcium carbonate, aluminum hydroxide, barium sulfate and the like, with silica, talc and clay being preferred. The particle size of the filler is not particularly limited, but usually has an average particle size of 0.001 to 100.
μm1 is preferably arbitrarily selected from 0.005 to 50 μm.
充填剤の添加量は、ポリビニルアルコール溶液の固型分
１００重量部に対して通常０．２〜１（ｌ置部、好まし
くは０．２〜５重量部である。添加量が０．２ｆｔＦ＃
部未満では十分な艶消し効果が得られず、１０重量部を
超えると塗膜の凸凹が大きくなり、成形時に樹脂成形品
表面に充填剤の一部が浸入し、付着してくるので、好ま
しくない。The amount of filler added is usually 0.2 to 1 part, preferably 0.2 to 5 parts by weight, per 100 parts by weight of the solid content of the polyvinyl alcohol solution.
If the amount is less than 10 parts by weight, a sufficient matting effect will not be obtained, and if it exceeds 10 parts by weight, the unevenness of the coating will become large and some of the filler will penetrate and adhere to the surface of the resin molded product during molding, so it is preferable. do not have.
ポリビニルアルコールに充填剤を添加した配合物は、ハ
ケやスプレーで型の表面に塗布され、常温又は３０〜６
０℃で強制的に乾燥を行う。型は金属又は樹脂型で通常
の光沢のある型を用いることができる。The mixture of fillers added to polyvinyl alcohol is applied to the surface of the mold with a brush or spray and kept at room temperature or at 30 to 60°C.
Force drying at 0°C. The mold may be a metal or resin mold, and an ordinary glossy mold can be used.
本発明でゲルコートあるいは裏打ち層に使用する熱硬化
性樹脂としては、フェノール樹脂、エポキシ樹脂、ビニ
ルエステル樹脂、不飽和ポリエステル樹脂等が挙げられ
、裏打ち層は、ガラス繊維、有機繊維等の補強材や炭酸
カルシウム、水酸化アルミニウム等の充填剤を含有する
ことができる。Examples of thermosetting resins used in the gel coat or backing layer in the present invention include phenolic resins, epoxy resins, vinyl ester resins, and unsaturated polyester resins. It can contain fillers such as calcium carbonate and aluminum hydroxide.
以下に本発明を実施例により具体的に説明するが、本発
明はこの実施例により制限されるものではない。尚、例
中の部および％はすべて重量基準である。EXAMPLES The present invention will be specifically explained below with reference to Examples, but the present invention is not limited to these Examples. In addition, all parts and percentages in the examples are based on weight.
実施例１
デンカポバールト２４〔電気化学工業側聞ポリビニルア
ルコール、ケン化度７日、重合度２４００）４０部をメ
タノール４５部、酢酸エチル１５部からなる混合溶剤に
溶かして得られたポリビニルアルコール溶液１００部と
アエロジル２００（日本アエロジル社製シリカ、平均粒
径０．０１２μｍ）１部とからなる配合物をＦＲＰｉＲ
内装壁型に１０ｇ ／ｄの割合でスプレー塗布し、４０
℃で１０分間乾燥した。Example 1 Polyvinyl alcohol solution obtained by dissolving 40 parts of Denka Povalt 24 (Denka Kagaku Kogyo side polyvinyl alcohol, degree of saponification 7 days, degree of polymerization 2400) in a mixed solvent consisting of 45 parts of methanol and 15 parts of ethyl acetate. 100 parts of Aerosil and 1 part of Aerosil 200 (silica manufactured by Nippon Aerosil Co., Ltd., average particle size 0.012 μm) was FRPiR.
Spray it on the interior wall mold at a rate of 10g/d,
It was dried at ℃ for 10 minutes.
次いでポリライト ＧＣ−２３０（大日本インキ化学工
業ｎｍ不飽和ポリエステル樹脂〕１００部、ポリトンブ
ルーＪ−８４１（同社製着色剤）１０部、６％コバルト
溶液０．４部、メチルエチルケトンパーオキサイド１部
からなるゲルコートをスプレー塗布し、硬化させた後、
ポリライト ＰＨ−１３３（大日本インキ化学工業側製
コバルト含有不飽和ポリエステル樹脂〕 １００部に対
してメチルエチルケトンパーオキサイドを１部の割合で
混合して得られた裏打ち用不飽和ポリエステル樹脂と４
５０ ｇ／Ｉのチョツプドストランドマット３枚とを、
ガラスＩａ＃４＃含有率が３０％になる割合でハンドレ
イ積層し、硬化させた後、脱型して厚さ３顛の内装壁用
不飽和ポリエステル樹脂成形品を得た。得られた成形品
のゲルコート表面にはポリビニルアルコールフィルムが
付着していたが、水洗で簡単に落ち、水洗して得られた
成形品のゲルコート表面は完全な艶消しタイプとなって
いた。Next, from 100 parts of Polylite GC-230 (Dainippon Ink & Chemicals nm unsaturated polyester resin), 10 parts of Polyton Blue J-841 (colorant manufactured by the same company), 0.4 part of 6% cobalt solution, and 1 part of methyl ethyl ketone peroxide. After spraying and curing the gel coat,
Polylite PH-133 (Cobalt-containing unsaturated polyester resin manufactured by Dainippon Ink and Chemicals) An unsaturated polyester resin for backing obtained by mixing 1 part of methyl ethyl ketone peroxide to 100 parts of 4
3 pieces of chopped strand mat of 50 g/I,
After hand-laid lamination with a glass Ia#4# content of 30% and curing, the mold was demolded to obtain an unsaturated polyester resin molded product for interior walls with a thickness of 3 layers. A polyvinyl alcohol film was attached to the gel coat surface of the molded product obtained, but it was easily removed by washing with water, and the gel coat surface of the molded product obtained after washing with water had a completely matte type.
実施例２
ポリビニルアルコール溶液としてデンカポバールＢ−０
５〔電気化学工業Ｉａｔａポリビニルアルコール、ケン
化度８日、重合度５００）４０部を水３０部、メタノー
ル３０部からなる混合溶剤に溶かして得られたポリビニ
ルアルコール溶液を用いアエロジル２００１部の代りに
平均粒径３０μｍのタルク４部、裏打ち用不飽和ポリエ
ステル樹脂とチョツプドストランドマットの代りにエビ
クロンＲ−８５０Ｃ大日本インキ化学工業側製エポキシ
樹脂）１００部に対してラソカマイドＷＨ−０５０（同
社製エポキシ樹脂用硬化剤）を３０部、炭酸カルシウム
を２１０部、寒水石を３１０部の割合で混合して得られ
たレジンコンクリートを用いた以外は、実施例１と同様
にして、艶のないゲルコートを有するレジンコンクリー
トパネルを得た。Example 2 Denkapoval B-0 as polyvinyl alcohol solution
5 [Denki Kagaku Kogyo Iata polyvinyl alcohol, saponification degree 8 days, polymerization degree 500] A polyvinyl alcohol solution obtained by dissolving 40 parts of Denki Kagaku Kogyo Iata polyvinyl alcohol in a mixed solvent consisting of 30 parts of water and 30 parts of methanol was used instead of 2001 parts of Aerosil. 4 parts of talc with an average particle size of 30 μm, 100 parts of Lasocamide WH-050 (manufactured by Dainippon Ink & Chemicals) to 100 parts of Evicron R-850C epoxy resin (manufactured by Dainippon Ink and Chemicals) in place of the unsaturated polyester resin for backing and the chopped strand mat. A matte gel coat was prepared in the same manner as in Example 1, except that resin concrete obtained by mixing 30 parts of epoxy resin curing agent), 210 parts of calcium carbonate, and 310 parts of angar stone was used. A resin concrete panel was obtained.
Claims (1)
なる配合物を塗布し、乾燥した後、熱硬化性樹脂を用い
て成形することを特徴とする艶消し樹脂成形品の製造方
法。A method for producing a matte resin molded article, which comprises applying a mixture of a polyvinyl alcohol solution and a filler to the surface of a mold, drying it, and then molding it with a thermosetting resin.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP58100905A JPS59225911A (en) | 1983-06-08 | 1983-06-08 | Manufacture of matted resin molding |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP58100905A JPS59225911A (en) | 1983-06-08 | 1983-06-08 | Manufacture of matted resin molding |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JPS59225911A true JPS59225911A (en) | 1984-12-19 |
Family
ID=14286353
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP58100905A Pending JPS59225911A (en) | 1983-06-08 | 1983-06-08 | Manufacture of matted resin molding |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPS59225911A (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE19619838C1 (en) * | 1996-05-17 | 1998-01-22 | L Armee Horst Talmon | Mould separating agent |
| WO1998015592A1 (en) * | 1996-10-07 | 1998-04-16 | E.I. Du Pont De Nemours And Company | Controlled gloss fluoropolymer films |
-
1983
- 1983-06-08 JP JP58100905A patent/JPS59225911A/en active Pending
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE19619838C1 (en) * | 1996-05-17 | 1998-01-22 | L Armee Horst Talmon | Mould separating agent |
| WO1998015592A1 (en) * | 1996-10-07 | 1998-04-16 | E.I. Du Pont De Nemours And Company | Controlled gloss fluoropolymer films |
| US5972472A (en) * | 1996-10-07 | 1999-10-26 | E. I. Du Pont De Nemours And Company | Process of forming controlled gloss fluoropolymer films |
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