JP2963083B2 - Method for producing patterned foam molded article and patterned foam molded article - Google Patents
Method for producing patterned foam molded article and patterned foam molded articleInfo
- Publication number
- JP2963083B2 JP2963083B2 JP10073089A JP7308998A JP2963083B2 JP 2963083 B2 JP2963083 B2 JP 2963083B2 JP 10073089 A JP10073089 A JP 10073089A JP 7308998 A JP7308998 A JP 7308998A JP 2963083 B2 JP2963083 B2 JP 2963083B2
- Authority
- JP
- Japan
- Prior art keywords
- molded article
- resin
- resin composition
- foam molded
- decorative
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Expired - Lifetime
Links
Landscapes
- Laminated Bodies (AREA)
- Extrusion Moulding Of Plastics Or The Like (AREA)
- Molding Of Porous Articles (AREA)
Description
【0001】[0001]
【発明の属する技術分野】本発明は、模様付き発泡成形
体の製法およびこの製法によって得られる模様付き発泡
成形体に関する。BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a method for producing a patterned foam molded article and a patterned foam molded article obtained by the production method.
【0002】[0002]
【従来の技術】従来から、表面に大理石などの模様や木
目やエンボス調などの立体的模様を現出させた発泡成形
体は、軽量で耐熱性、デザイン性に優れているため、タ
イル、木材、金属板、石材などの代替品として種々の分
野で利用されている。この種の模様付き発泡成形体は、
ポリ塩化ビニルなどの基材樹脂に発泡剤を配合した組成
物を連続的に押し出し発泡成形させたのち、表面に塗
装、印刷、シート貼りまたはエンボス加工などを行うこ
とによって製造されている。しかしながら、このような
従来法においては、成形後に付加的な加工処理を必要と
するばかりでなく、模様を施した表層部が、建材などと
して使用する場合、施行作業および施行後の屋外暴露な
どによる光線、温度変化、水分などによって変色、退
色、変質、剥離、消失するなどという耐候性、耐水性の
問題があり、屋外や水回りでの使用、長期間の使用など
には適さないという欠点がある。また、成形用金型に加
工して模様を現出させる方法も取られているが、同じ模
様しか現出せず、専用の金型が必要であり、表面の凸凹
によって模様を形成しているために、模様が消失しやす
い。2. Description of the Related Art Conventionally, foamed moldings having a surface such as marble or a three-dimensional pattern such as wood grain or embossing on the surface are lightweight, excellent in heat resistance, and excellent in design. It is used in various fields as a substitute for metal plates and stones. This type of patterned foam molded article is
It is manufactured by continuously extruding and foaming a composition in which a foaming agent is blended with a base resin such as polyvinyl chloride, and then performing painting, printing, sheet sticking or embossing on the surface. However, in such a conventional method, not only additional processing is required after molding, but also when the patterned surface layer is used as a building material, etc., due to the implementation work and outdoor exposure after the implementation. There is a problem of weather resistance and water resistance such as discoloration, fading, deterioration, peeling, and disappearing due to light, temperature change, moisture, etc., and it is not suitable for use outdoors, around water, long-term use, etc. is there. In addition, there is also a method in which a pattern is made by processing into a molding die, but only the same pattern is made to appear, and a dedicated mold is required, and the pattern is formed by unevenness on the surface. In addition, patterns tend to disappear.
【0003】近年においては、押し出し機スクリューの
先端部やダイヘッドなどを特殊な構造にすることによっ
て、低発泡成形体の表面に立体的に木目や大理石模様を
つける方法が採用されるようになってきているが、特殊
な構造を有する発泡体成形装置を必要とするだけでな
く、表面の凸凹によって、単純な曲線や直線などの模様
を形成しているために、模様が消失しやすくまた複雑で
多様な模様を現出させることは困難である。In recent years, a method of three-dimensionally giving a grain or marble pattern to the surface of a low-foaming molded article by adopting a special structure at the tip of an extruder screw or a die head has been adopted. However, not only does it require a foam molding device with a special structure, but it also forms patterns such as simple curves and straight lines due to the unevenness of the surface. It is difficult to make various patterns appear.
【0004】比較的最近においては、薄片状粉末を含有
する加飾・表層用樹脂組成物および発泡剤を含有する内
層用樹脂組成物を、それぞれ別々の押し出し機を用いて
溶融状態で合流させ、サイジングダイ内へ共押し出し
し、前記サイジングダイ内で低発泡一体成形を行い、模
様付き発泡成形体を製造する方法も開発されているが、
この方法で得られる模様付き発泡成形体の表面には光沢
がなく、外観不良のためその用途は限定されている。さ
らに、最近では、材料としてのポリ塩化ビニルの使用
は、その製品の廃棄処理の際にダイオキシンなどを発生
させるため、好ましくないことが明らかになっている。
しかし、軽量性、断熱性かつデザイン性に優れている上
記模様付き発泡成形体は、近来ますます各種内外装分野
そのほか家電、雑貨分野の各種部材として、表面に光沢
を有し堅牢で耐水性、耐候性に優れたものを求められて
いる。[0004] Relatively recently, a resin composition for decorating / surface layer containing flaky powder and a resin composition for inner layer containing foaming agent are combined in a molten state using separate extruders, respectively . coextruded into a sizing die, provides low foaming molded within said sizing die, but also a method of producing a patterned foamed molded have been developed,
The surface of the foamed molded article obtained by this method has no gloss and its use is limited due to poor appearance. Furthermore, recently, it has become clear that the use of polyvinyl chloride as a material is not preferable because dioxin and the like are generated at the time of disposal of the product.
However, the above-mentioned patterned foamed moldings, which are lightweight, heat-insulating and excellent in design, are coming to the interior and exterior fields, as well as home appliances and sundries in various fields. What is excellent in weather resistance is required.
【0005】[0005]
【発明が解決しようとする課題】本発明は、上記従来技
術の課題を背景になされたもので、堅牢性、耐水性、耐
薬品性、耐候性に優れ、複雑で多様な模様が現出され
た、表層が透明で美しい光沢がある模様付き発泡成形体
を提供することを目的とする。SUMMARY OF THE INVENTION The present invention has been made in view of the above-mentioned problems of the prior art, and has excellent robustness, water resistance, chemical resistance, and weather resistance, and has complex and various patterns. It is another object of the present invention to provide a patterned foamed molded product having a beautiful glossy surface layer.
【0006】[0006]
【課題を解決するための手段】本発明は、熱可塑性樹脂
を含有する透明な表層用樹脂、薄片状粉末および熱可塑
性樹脂を含有する加飾・中層用樹脂組成物ならびに発泡
剤を含有する内層用熱可塑性樹脂組成物をそれぞれ別々
の押し出し機を用いて溶融状態で合流させ、サイジング
ダイ内へ共押し出しし、前記サイジングダイ内で低発泡
一体成形を行うことを特徴とする、模様付き発泡成形体
の製法、およびその製法によって得られる模様付き発泡
成形体を提供するものである。SUMMARY OF THE INVENTION The present invention provides a transparent resin for a surface layer containing a thermoplastic resin, a resin composition for a decorative / middle layer containing a flaky powder and a thermoplastic resin, and an inner layer containing a foaming agent. The thermoplastic resin compositions are joined together in a molten state using separate extruders and sizing
The present invention provides a method for producing a patterned foam molded article, which is co-extruded into a die and performs low foam integral molding in the sizing die , and a patterned foam molded article obtained by the production method.
【0007】[0007]
【発明の実施の形態】本発明に用いられる表層用樹脂に
含有される熱可塑性樹脂としては、ポリカーボネート、
ABS樹脂、AS樹脂、AAS樹脂などのアクリル系樹
脂またはポリスチレン系樹脂などが挙げられるが、成形
品の光沢、透明性、強度、耐候性、耐水性、耐薬品性、
取り扱いの容易さなどから、特にアクリル系樹脂が好ま
しい。本発明に使用されるアクリル系樹脂としては、ポ
リメチルメタクリレート、メチルメタクリレート−ブチ
ルアクリレート共重合体、メチルメタクリレート−スチ
レン共重合体などのメタクリル酸エステルの重合体およ
び共重合体などが挙げられるが、具体的には、ダイセル
化学工業株式会社製のメチルメタクリレート−スチレン
樹脂であるセビアンMAS10、MAS20、MAS3
0、住友化学工業株式会社製のメタクリル樹脂であるス
ミペックLG、MG、MH、ダイセル化学工業株式会社
製のポリスチレンであるGP10、GP20、GP31
などが挙げられる。上記熱可塑性樹脂は、1種単独で使
用することも、あるいは2種以上を混合して用いること
もできる。これらの樹脂を使用することにより、得られ
る本発明の模様付き発泡成形体は、表面が透明で優れた
光沢を有し、変色や劣化を受けず、優れた堅牢性、耐水
性、耐薬品性、耐候性を示す。DESCRIPTION OF THE PREFERRED EMBODIMENTS The thermoplastic resin contained in the resin for the surface layer used in the present invention includes polycarbonate,
ABS resin, AS resin, acrylic resin such as AAS resin or polystyrene resin, etc., and the gloss, transparency, strength, weather resistance, water resistance, chemical resistance,
Acrylic resin is particularly preferred from the viewpoint of easy handling. Examples of the acrylic resin used in the present invention include polymethyl methacrylate, methyl methacrylate-butyl acrylate copolymer, and methacrylic acid ester polymers and copolymers such as methyl methacrylate-styrene copolymer. Specifically, Sebian MAS10, MAS20, MAS3, which is a methyl methacrylate-styrene resin manufactured by Daicel Chemical Industries, Ltd.
0, Sumipec LG, MG, MH, methacrylic resin manufactured by Sumitomo Chemical Co., Ltd., GP10, GP20, GP31, polystyrene manufactured by Daicel Chemical Industries, Ltd.
And the like. The above thermoplastic resins can be used alone or in combination of two or more. By using these resins, the patterned foam molded article of the present invention obtained has a transparent surface, excellent gloss, no discoloration or deterioration, and excellent fastness, water resistance and chemical resistance. And weather resistance.
【0008】また、本発明に用いられる加飾・中層用樹
脂組成物に含有される薄片状粉末としては、具体的に
は、炭酸カルシウム、ケイ酸カルシウム、クレー、カオ
リン、タルク、シリカ、ケイソウ土、雲母、アスベス
ト、硫酸バリウム、硫酸アルミニウム、硫酸カルシウ
ム、炭酸マグネシウム、二硫化モリブデン、ガラス繊
維、ガラス球、シラスバルーン、グラファイトなどの薄
片状の無機粉末、アルミナ、銅などの薄片状の金属粉
末、熱硬化性樹脂(エポキシ樹脂、不飽和ポリエステル
樹脂など)などの薄片状の難溶融性合成樹脂粉末などが
挙げられる。加飾・中層用樹脂組成物に含有される薄片
状粉末の種類を変えることにより、加飾・中層部に種々
の模様を発現させることができる。例えば、御影石調や
大理石模様などの模様を現出するには有色無機粉末、あ
るいは薄片状、繊維状の難溶融性合成樹脂素材が挙げら
れ、またその組み合わせ方により、木目、エンボス柄な
どの立体的な模様を現出することができる。上記薄片状
粉末は、1種単独で使用することも、あるいは2種以上
を混合して用いることもできる。The flaky powder contained in the decorative / middle layer resin composition used in the present invention is, for example, calcium carbonate, calcium silicate, clay, kaolin, talc, silica, diatomaceous earth. Flaky inorganic powder such as mica, asbestos, barium sulfate, aluminum sulfate, calcium sulfate, magnesium carbonate, molybdenum disulfide, glass fiber, glass sphere, shirasu balloon, graphite, flaky metal powder such as alumina, copper, etc. Flaky hard-to-melt synthetic resin powders such as thermosetting resins (epoxy resins, unsaturated polyester resins, etc.) are exemplified. By changing the type of flaky powder contained in the decorative / middle layer resin composition, various patterns can be exhibited in the decorative / middle layer portion. For example, to produce patterns such as granite or marble, colored inorganic powder or flake-like or fibrous hard-to-melt synthetic resin materials can be used. It can show a typical pattern. The flaky powder can be used alone or as a mixture of two or more.
【0009】薄片状粉末の粒径(重量平均粒径)は、通
常、50〜1,800μm、好ましくは150〜1,7
00μmであり、50μm未満の場合には、発泡成形体
表面部に模様が十分に現出せず、一方、1,800μm
を超えると、押し出しスリットを詰まらせ、吐出障害を
もたらす。The particle size (weight average particle size) of the flaky powder is usually 50 to 1,800 μm, preferably 150 to 1,7 μm.
When the thickness is less than 50 μm, the pattern does not sufficiently appear on the surface of the foamed molded product, and on the other hand, 1,800 μm
Exceeding the limit causes clogging of the extrusion slit, resulting in ejection failure.
【0010】薄片状粉末の配合量は、加飾・中層用樹脂
組成物中に、通常、0.05〜4重量%、好ましくは
0.1〜3重量%であり、0.05重量%未満の場合に
は、加飾・中層部表面に所望の模様が得難く、一方、5
重量%を超えると、加飾・中層部が内層発泡体から剥離
しやすくなるだけでなく、加飾・中層用樹脂組成物のペ
レット化が困難となる。The compounding amount of the flaky powder is usually from 0.05 to 4% by weight, preferably from 0.1 to 3% by weight, and preferably less than 0.05% by weight in the decorative / middle layer resin composition. In the case of, it is difficult to obtain a desired pattern on the surface of the decorative / middle layer.
When the content is more than 10% by weight, not only the decorative / middle layer portion is easily peeled off from the inner layer foam, but also it becomes difficult to pelletize the decorative / middle layer resin composition.
【0011】上記薄片状粉末を配合して加飾・中層用樹
脂組成物に含有される熱可塑性樹脂としては、ABS樹
脂、AS樹脂、AAS樹脂などやポリスチレン、スチレ
ン−メチルメタクリレート共重合体、スチレン−ブタジ
エン共重合体などのスチレンの重合体および共重合体な
どのポリスチレン系樹脂、ポリメチルメタクリレート、
メチルメタクリレート−ブチルアクリレート共重合体な
どのメタクリル酸エステルの重合体および共重合体など
のアクリル系樹脂などが挙げられる。好ましくは、メル
トインデックス(200℃、5kg荷重)2〜30g/
10分のポリスチレン系樹脂または同メルトインデック
ス1〜10g/10分のアクリル系樹脂であり、特に好
ましくはポリスチレン系樹脂、メチルメタクリレート−
スチレン系樹脂であり、例えば、ダイセル化学工業株式
会社製のポリスチレンであるGP10、GP20、GP
31、および同社製のメチルメタクリレート−スチレン
系樹脂であるセビアンMAS10、MAS20、MAS
30などが挙げられる。上記熱可塑性樹脂は、1種単独
で使用することも、あるいは2種以上を混合して用いる
こともできる。これらの樹脂を使用することにより、模
様付き発泡成形体は、変色や劣化を受けず優れた堅牢
性、耐水性、耐薬品性、耐候性を示す。The thermoplastic resin contained in the decorative / middle layer resin composition by mixing the above flaky powder includes ABS resin, AS resin, AAS resin, polystyrene, styrene-methyl methacrylate copolymer, and styrene. -Styrene polymers such as butadiene copolymers and polystyrene resins such as copolymers, polymethyl methacrylate,
Examples include methacrylic acid ester polymers such as methyl methacrylate-butyl acrylate copolymers and acrylic resins such as copolymers. Preferably, the melt index (200 ° C., 5 kg load) 2 to 30 g /
A polystyrene resin for 10 minutes or an acrylic resin having a melt index of 1 to 10 g / 10 minutes, particularly preferably a polystyrene resin or methyl methacrylate-
GP10, GP20, GP, which are styrene resins, for example, polystyrene manufactured by Daicel Chemical Industries, Ltd.
31 and Sebian MAS 10, MAS 20, MAS which are methyl methacrylate-styrene resins manufactured by the company
30 and the like. The above thermoplastic resins can be used alone or in combination of two or more. By using these resins, the patterned foamed molded article exhibits excellent robustness, water resistance, chemical resistance, and weather resistance without undergoing discoloration or deterioration.
【0012】さらに、内層用熱可塑性樹脂組成物に含有
される熱可塑性樹脂としては、ポリカーボネート、アク
リル系樹脂、ABS樹脂、AS樹脂、AAS樹脂などの
ポリスチレン系樹脂などが挙げられるが好ましくはポリ
スチレン系樹脂である。ポリスチレン系樹脂としては、
ABS樹脂、AS樹脂、AAS樹脂などや、ポリスチレ
ン、スチレン−メチルメタクリレート共重合体、スチレ
ン−ブタジエン共重合体などのスチレンの重合体および
共重合体などが挙げられる。上記熱可塑性樹脂は、1種
単独で使用することも、あるいは2種以上を混合して用
いることもできる。内層用熱可塑性樹脂組成物に含有さ
れる発泡剤としては、例えば、重炭酸ナトリウム、炭酸
アンモニウム、アゾジカルボンアミド、ベンゼンスルホ
ニルヒドラジドなどの固体状発泡剤などが挙げられる。
上記発泡剤は、1種単独で使用することも、あるいは2
種以上を混合して用いることもできる。発泡剤の配合比
は、内層用熱可塑性樹脂組成物中に、通常、0.1〜1
0重量%、好ましくは0.2〜5重量%である。0.1
重量%未満では発泡が不十分であり、一方、10重量%
を超えると、発泡倍率が高すぎて、脱泡、表面が荒れる
などの問題が起こる。Further, examples of the thermoplastic resin contained in the thermoplastic resin composition for the inner layer include polystyrene resins such as polycarbonate, acrylic resin, ABS resin, AS resin, and AAS resin. Resin. As polystyrene resin,
Examples include ABS resins, AS resins, AAS resins, and the like, and polymers and copolymers of styrene such as polystyrene, styrene-methyl methacrylate copolymer, and styrene-butadiene copolymer. The above thermoplastic resins can be used alone or in combination of two or more. Examples of the foaming agent contained in the thermoplastic resin composition for the inner layer include solid foaming agents such as sodium bicarbonate, ammonium carbonate, azodicarbonamide, and benzenesulfonyl hydrazide.
The above foaming agents can be used alone or
Mixtures of more than one species can be used. The compounding ratio of the foaming agent is usually 0.1 to 1 in the thermoplastic resin composition for the inner layer.
0% by weight, preferably 0.2 to 5% by weight. 0.1
If the amount is less than 10% by weight, the foaming is insufficient.
When the ratio exceeds, the expansion ratio is too high, and problems such as defoaming and surface roughening occur.
【0013】上記表層用樹脂、薄片状粉末を含有する加
飾・中層用樹脂組成物および発泡剤を含有する内層用熱
可塑性樹脂組成物には、それぞれ、公知の滑剤、軟化
剤、無機充填剤、着色剤、耐熱安定剤、帯電防止剤、耐
候安定剤、老化防止剤、抗菌剤、防カビ剤、木粉などの
セルロース系物質などを適宜加えて混合することができ
る。上記表層用樹脂、加飾・中層用樹脂組成物および内
層用熱可塑性樹脂組成物は、通常、あらかじめペレット
状に成形したのち、以下の共押し出し成形処理に付され
る。The above-mentioned resin for the surface layer, the resin composition for the decorating / middle layer containing the flaky powder, and the thermoplastic resin composition for the inner layer containing the foaming agent include a known lubricant, softener and inorganic filler, respectively. Colorants, heat stabilizers, antistatic agents, weathering stabilizers, antioxidants, antibacterial agents, fungicides, cellulosic substances such as wood flour, etc. can be added and mixed as appropriate. The above surface layer resin, decorative / middle layer resin composition, and inner layer thermoplastic resin composition are usually formed into pellets in advance, and then subjected to the following coextrusion processing.
【0014】共押し出し装置としては、従来から一般に
プラスチックの共押し出し成形体の製造に使用されてい
るものを利用できる。特に好適な装置としては、表層用
樹脂を押し出すためのシングル押し出し機、加飾・中層
用樹脂組成物を押し出すためのシングル押し出し機およ
び内層用熱可塑性樹脂組成物を押し出すためのシングル
押し出し機を備えたセルカプロセス異形押し出し金型、
すなわちダイスおよびサイジングダイである。As the co-extrusion apparatus, any one conventionally used for producing a co-extrusion molding of plastic can be used. Particularly preferred devices include a single extruder for extruding a surface layer resin, a single extruder for extruding a decorative / middle layer resin composition, and a single extruder for extruding an inner layer thermoplastic resin composition. Cerca process deformed extrusion mold,
That is, a die and a sizing die .
【0015】押し出し温度は、押し出し処理される組成
物の種類および組成によって選択されるが、通常、10
0〜300℃である。押し出し機から溶融状態で押し出
される内層用熱可塑性樹脂組成物は、ダイス内へ吐出さ
れると同時に、別の押し出し機から溶融状態で押し出さ
れる加飾・中層用樹脂組成物と熱融着し、さらに加飾・
中層用樹脂組成物は、別の押し出し機から溶融状態で押
し出される表層用樹脂と熱融着して、所望の形態に一体
成形される。The extrusion temperature is selected depending on the type and composition of the composition to be extruded.
0-300 ° C. The thermoplastic resin composition for the inner layer extruded in a molten state from the extruder is simultaneously discharged to the die , and heat-fused with the resin composition for a decorating / middle layer extruded in a molten state from another extruder, Further decoration
The resin composition for the middle layer is heat-sealed with the resin for the surface layer extruded in a molten state from another extruder, and is integrally molded into a desired form.
【0016】この場合、表層、加飾・中層、内層の厚み
には特に限定はないが、一般的には表層厚を0.01〜
2mm程度、加飾・中層厚を0.2〜2mm程度、内層
厚を3〜50mm程度にするのが好ましい。押し出し量
および引取速度には、特に限定はないが、通常はそれぞ
れ5〜100kg/時間および0.3〜3m/分であ
る。また、内層の発泡倍率は、通常、1.2〜4倍程度
である。In this case, the thickness of the surface layer, the decorative / middle layer, and the inner layer is not particularly limited.
It is preferable that the thickness of the decorative / middle layer is about 0.2 to 2 mm, and the thickness of the inner layer is about 3 to 50 mm. The extrusion amount and the take-off speed are not particularly limited, but are usually 5 to 100 kg / hour and 0.3 to 3 m / minute, respectively. The expansion ratio of the inner layer is usually about 1.2 to 4 times.
【0017】以上のようにして、表層用樹脂、加飾・中
層用樹脂組成物および内層用熱可塑性樹脂組成物の三層
構造を有する模様付き発泡成形体を得ることができる。
本発明の発泡成形体は、表面が透明で光沢があり堅牢で
耐水性、耐薬品性、耐候性に優れているため、各種内外
装分野、特に、建材分野、サニタリー分野、家具や食器
などの什器類などの分野そのほか家電、雑貨分野の各種
部材として使用することができる。As described above, a patterned foam molded article having a three-layer structure of the surface layer resin, the decorative / middle layer resin composition, and the inner layer thermoplastic resin composition can be obtained.
The foamed molded article of the present invention has a transparent and glossy surface, is robust, is water-resistant, has excellent chemical and weather resistance, and is therefore excellent in various interior / exterior fields, particularly in the building materials field, sanitary field, furniture and tableware, and the like. It can be used as various components in the field of furniture, home appliances and miscellaneous goods.
【0018】[0018]
【実施例】以下、実施例(および比較例)を挙げ、本発
明を更に具体的に説明するが、本発明はこれらにより限
定されるものではない。また、実施例および比較例中、
各種測定項目は、下記に従った。EXAMPLES Hereinafter, the present invention will be described more specifically with reference to examples (and comparative examples), but the present invention is not limited thereto. In Examples and Comparative Examples,
Various measurement items followed the following.
【0019】成形品表面外観 成形品表面状態を、下記の評価基準に従って目視評価し
た。 ○;平滑で、透明感があり外観良好 ×;凸凹があるか、不透明であり外観不良硬度試験 JIS K5400に基づいて、鉛筆硬度を測定した。 Surface appearance of molded article The surface condition of the molded article was visually evaluated according to the following evaluation criteria. ;: Smooth, transparent, good appearance ×: Irregular or opaque, poor appearance hardness test Pencil hardness was measured based on JIS K5400.
【0020】耐水性 成形品表面に水を滴下し、5日間放置した後の表面状態
を、下記の評価基準に従って目視評価した。 ○;表面変化なく、外観良好 ×;表面が膨潤してシワが形成され、外観不良耐薬品性 成形品表面に5%塩酸を滴下し、24時間放置した後の
表面状態を、下記の評価基準に従って目視評価した。 ○;表面変化なく、外観良好 ×;表面が膨潤してシワが形成され、外観不良耐候性 サンシャインウェザーメータ(スガ試験機株式会社製)
を用いて、ブラックパネル温度63℃、降雨ありの条件
下で耐候性試験を行ない、100時間後の成形品表面状
態を、下記の評価基準に従って目視評価した。 ○;表面変化なしで、外観非常に良好 ×;表面に凸凹生成、変色、不透明化などが起こり外観
不良Water was dropped on the surface of the water- resistant molded article, and after standing for 5 days, the surface condition was visually evaluated according to the following evaluation criteria. ;: No change in surface, good appearance ×: surface swells to form wrinkles, poor appearance 5% hydrochloric acid was dropped on the surface of the chemically resistant molded article, and the surface condition after standing for 24 hours was evaluated according to the following evaluation criteria. Was visually evaluated according to the following. ○: no change in surface, good appearance ×: surface swells to form wrinkles, poor appearance, weather resistance Sunshine weather meter (manufactured by Suga Test Instruments Co., Ltd.)
, A weather resistance test was conducted under conditions of a black panel temperature of 63 ° C. and rainfall, and the surface state of the molded article after 100 hours was visually evaluated according to the following evaluation criteria. ;: Very good appearance without surface change ×: Irregular appearance, discoloration, opacity, etc. on the surface, resulting in poor appearance
【0021】実施例1 表層用樹脂としてアクリル系樹脂(ダイセル化学工業株
式会社製、セビアンMAS20)を用いた。加飾・中層
用樹脂組成物として、ポリスチレン系樹脂(ダイセル化
学工業株式会社製、GP31)100gに薄片状粉末と
して有色酸化アルミナ1gを均一に分散させた樹脂組成
物を、ペレット形態に押し出し成形したものを用いた。
内層用熱可塑性樹脂組成物として、ポリスチレン系樹脂
(ダイセル化学工業株式会社製、GP31)にアゾジカ
ルボンアミドを0.7重量%ドライブレンドしてペレッ
ト状樹脂組成物を調製した。共押し出し成形装置として
は、表層、加飾・中層、内層用共、それぞれシングル押
し出し機を備えたセルカプロセス異形押し出し機、すな
わちダイスおよびサイジングダイを使用した。各押し出
し機へ上記表層用アクリル系樹脂、ペレット状の加飾・
中層用樹脂組成物およびペレット状の内層用熱可塑性樹
脂組成物をそれぞれ供給し、常法にしたがって共押し出
し成形を行ない三層構造を有する平板状発泡成形体を製
造した。上記評価方法で成形品表面外観、硬度、耐水
性、耐薬品性の評価を行った。共押し出し成形条件およ
び得られた発泡成形体の評価結果を表1に示す。Example 1 An acrylic resin (Sebian MAS20, manufactured by Daicel Chemical Industries, Ltd.) was used as a resin for the surface layer. A resin composition in which 1 g of colored alumina oxide as a flaky powder was uniformly dispersed in 100 g of a polystyrene resin (GP31, manufactured by Daicel Chemical Industries, Ltd.) as a decorative / middle layer resin composition was extruded into a pellet form. Was used.
As the thermoplastic resin composition for the inner layer, 0.7% by weight of azodicarbonamide was dry-blended with a polystyrene resin (GP31, manufactured by Daicel Chemical Industries, Ltd.) to prepare a pellet-shaped resin composition. As co-extrusion molding equipment, for the surface layer, decorative / middle layer, and inner layer, a single extruder is used for each of the CELCA process profile extrusion machine ,
A die and a sizing die were used. Acrylic resin for surface layer, pellet-shaped decoration
The resin composition for the middle layer and the thermoplastic resin composition for the inner layer in the form of pellets were respectively supplied, and co-extrusion was carried out according to a conventional method to produce a flat foamed molded article having a three-layer structure. The molded article surface appearance, hardness, water resistance, and chemical resistance were evaluated by the above evaluation methods. Table 1 shows the conditions of the coextrusion molding and the evaluation results of the obtained foamed molded product.
【0022】実施例2 加飾・中層用樹脂組成物として、アクリル系樹脂(ダイ
セル化学工業株式会社製、セビアンMAS20)を使用
した以外は、実施例1と同様の操作を行ない三層構造を
有する平板状発泡成形体を製造した。実施例1と同様の
評価方法で成形品表面外観、硬度、耐水性、耐薬品性の
評価を行った。共押し出し成形条件および得られた発泡
成形体の評価結果を表1に示す。Example 2 The same operation as in Example 1 was carried out except that an acrylic resin (Sebian MAS20, manufactured by Daicel Chemical Industries, Ltd.) was used as the resin composition for the decorating / middle layer, and the resin composition had a three-layer structure. A flat foam molded article was produced. The surface appearance, hardness, water resistance and chemical resistance of the molded product were evaluated in the same manner as in Example 1. Table 1 shows the conditions of the coextrusion molding and the evaluation results of the obtained foamed molded product.
【0023】比較例1 加飾・表層用樹脂組成物として、アクリル系樹脂(ダイ
セル化学工業株式会社製、セビアンMAS20)100
gに、薄片状粉末として有色酸化アルミナ1gを均一に
分散させた樹脂組成物をペレット形態に押し出し成形し
たものを用いた。内層用熱可塑性樹脂組成物として、ポ
リスチレン系樹脂(ダイセル化学工業株式会社製、GP
31)にアゾジカルボンアミドを0.7重量%ドライブ
レンドしてペレット状樹脂組成物を調製した。共押し出
し成形装置としては、加飾・表層、内層用共シングル押
し出し機を使用し、セルカプロセス異形押し出し機(ダ
イスおよびサイジングダイ)を使用した。各シングル押
し出し機へ上記ペレット状の加飾・表層用アクリル系樹
脂およびペレット状内層用熱可塑性樹脂組成物をそれぞ
れ供給し、常法にしたがって共押し出し成形を行ない二
層構造を有する平板状発泡成形体を製造した。上記評価
方法で成形品表面外観、硬度、耐水性、耐薬品性の評価
を行った。共押し出し成形条件および得られた発泡成形
体の評価結果を表1に示す。Comparative Example 1 An acrylic resin (Sebian MAS20, manufactured by Daicel Chemical Industries, Ltd.) 100 was used as a decorative / surface layer resin composition.
A resin composition in which 1 g of colored alumina oxide was uniformly dispersed as flaky powder and extruded into a pellet form was used. As the thermoplastic resin composition for the inner layer, a polystyrene resin (available from Daicel Chemical Industries, Ltd., GP
31) Azodicarbonamide was dry-blended with 0.7% by weight to prepare a pellet-shaped resin composition. The co-extrusion apparatus, decorative-surface layer, using the inner-layer co single extruder, Cerca process variant extruder (da
Chairs and sizing dies ). The above-mentioned pellet-shaped acrylic resin for decorating and surface layer and the thermoplastic resin composition for the pellet-shaped inner layer are supplied to each single extruder, and co-extrusion molding is performed according to a conventional method to obtain a two-layer flat plate foam molding. Body manufactured. The molded article surface appearance, hardness, water resistance, and chemical resistance were evaluated by the above evaluation methods. Table 1 shows the conditions of the coextrusion molding and the evaluation results of the obtained foamed molded product.
【0024】[0024]
【表1】 [Table 1]
【0025】[0025]
【発明の効果】本発明によって得られる模様付き発泡成
形体は、複雑多様な模様が現出され、表層部、加飾・中
層部および低発泡内層部が熱融着で一体化された三層構
造を有するため、表面が透明で光沢があり堅牢で耐水
性、耐薬品性、耐候性に優れており、各種内外装分野、
特に、建材分野、サニタリー分野、家具や食器などの什
器類などの分野そのほか、家電、雑貨分野の各種部材と
して使用することができる。The foamed molded article obtained by the present invention has a complex three-layered structure in which the surface layer, the decorative / middle layer, and the low-foaming inner layer are integrated by heat fusion. Due to its structure, the surface is transparent, glossy, robust, and excellent in water resistance, chemical resistance, and weather resistance.
In particular, it can be used as various materials in the fields of building materials, sanitary, furniture and tableware, as well as in the field of home appliances and sundries.
───────────────────────────────────────────────────── フロントページの続き (58)調査した分野(Int.Cl.6,DB名) B32B 1/00 - 35/00 B29C 47/00 - 47/96 B29C 67/20 - 67/24 ──────────────────────────────────────────────────続 き Continued on the front page (58) Fields surveyed (Int. Cl. 6 , DB name) B32B 1/00-35/00 B29C 47/00-47/96 B29C 67/20-67/24
Claims (2)
脂、薄片状粉末および熱可塑性樹脂を含有する加飾・中
層用樹脂組成物ならびに発泡剤を含有する内層用熱可塑
性樹脂組成物をそれぞれ別々の押し出し機を用いて溶融
状態で合流させ、サイジングダイ内へ共押し出しし、前
記サイジングダイ内で低発泡一体成形をおこなうことを
特徴とする、模様付き発泡成形体の製法。1. A resin for a transparent surface layer containing a thermoplastic resin, a resin composition for a decorative / middle layer containing a flaky powder and a thermoplastic resin, and a thermoplastic resin composition for an inner layer containing a foaming agent, respectively. A method for producing a patterned foam molded article, comprising: merging in a molten state using separate extruders, coextruding into a sizing die , and performing low-foam integral molding in the sizing die .
様付き発泡成形体。2. A patterned foam molded article obtained by the method according to claim 1.
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP10073089A JP2963083B2 (en) | 1998-03-09 | 1998-03-09 | Method for producing patterned foam molded article and patterned foam molded article |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP10073089A JP2963083B2 (en) | 1998-03-09 | 1998-03-09 | Method for producing patterned foam molded article and patterned foam molded article |
Publications (2)
Publication Number | Publication Date |
---|---|
JPH11254573A JPH11254573A (en) | 1999-09-21 |
JP2963083B2 true JP2963083B2 (en) | 1999-10-12 |
Family
ID=13508276
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JP10073089A Expired - Lifetime JP2963083B2 (en) | 1998-03-09 | 1998-03-09 | Method for producing patterned foam molded article and patterned foam molded article |
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JP4810525B2 (en) * | 2007-12-27 | 2011-11-09 | フクビ化学工業株式会社 | Three-layer extrusion molding |
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