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JP2005028794A - Vinyl chloride resin molding - Google Patents

Vinyl chloride resin molding Download PDF

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Publication number
JP2005028794A
JP2005028794A JP2003271857A JP2003271857A JP2005028794A JP 2005028794 A JP2005028794 A JP 2005028794A JP 2003271857 A JP2003271857 A JP 2003271857A JP 2003271857 A JP2003271857 A JP 2003271857A JP 2005028794 A JP2005028794 A JP 2005028794A
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Prior art keywords
vinyl chloride
chloride resin
molded body
molded
resin composition
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Japanese (ja)
Inventor
Takeshi Hachiman
健 八幡
Toru Yokota
透 横田
Tadashi Amano
正 天野
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Shin Etsu Chemical Co Ltd
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Shin Etsu Chemical Co Ltd
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Priority to JP2003271857A priority Critical patent/JP2005028794A/en
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Abstract

<P>PROBLEM TO BE SOLVED: To provide a vinyl chloride resin molding having excellent mechanical characteristics, excellent weatherability, and a low coefficient of linear expansion. <P>SOLUTION: The molding is composed of a molding substrate part of a vinyl chloride resin composition which has lowered the coefficient of linear expansion of the molding by adding 5-100 pts. wt. of an inorganic filler into 100 pts. wt. of the vinyl chloride resin and a molding surface layer part of a resin material of high weatherability. <P>COPYRIGHT: (C)2005,JPO&NCIPI

Description

本発明は、機械的特性及び耐候性に優れ、熱に対する寸法変化が小さい塩化ビニル系樹脂からなる、特に屋外用建材に適した成形体に関する。   The present invention relates to a molded article made of a vinyl chloride resin that is excellent in mechanical properties and weather resistance and has a small dimensional change with respect to heat, and is particularly suitable for outdoor building materials.

塩化ビニル樹脂は成形性、経済性に優れ、且つ、その成形体が難燃性、耐候性に優れているため、パイプ、継手、窓枠等の硬質建材用に幅広く使用されている。 通常これらに用いられる硬質塩化ビニル樹脂の成形体は金属に比べて線膨張率が大きく、特に建材に用いた場合、気温の変化あるいは直射日光の照射による蓄熱等により寸法が変化し、接続部、止め具部分に応力がかかって破損したり、また変形・歪みが発生したりしてしまうことがある。これらの問題を解決するために、従来から、無機系材料を添加して線膨張率を低下させ且つ、耐熱性を向上させる方法がとられている(例えば、特開平10−292080号、特開2002−80670号等)。
しかし、これらの無機系物質を添加した成形体を屋外で長時間使用すると、成形体の表面に無機物質が析出してくる、いわゆるチョーキング現象が発生するという問題がある。特に濃色系の製品ではチョーキング成分が白っぽく目立っため、成形体の美観を損ねるというの問題から、これら無機系物質を添加した成形体は屋外の用途には適さなかった。
特開平10−292080号公報 特開2002−80670号公報
Vinyl chloride resins are widely used for hard building materials such as pipes, joints, and window frames because they are excellent in moldability and economy, and their molded products have excellent flame resistance and weather resistance. Usually, the molded body of hard vinyl chloride resin used for these has a large linear expansion coefficient compared to metal, especially when used for building materials, the dimensions change due to changes in temperature or heat storage due to direct sunlight irradiation, The stopper part may be damaged due to stress, or may be deformed or distorted. In order to solve these problems, conventionally, an inorganic material is added to reduce the coefficient of linear expansion and improve the heat resistance (for example, Japanese Patent Laid-Open No. 10-292080, Japanese Patent Laid-open No. 2002-80670).
However, when a molded body to which these inorganic substances are added is used outdoors for a long time, there is a problem that a so-called choking phenomenon occurs in which the inorganic substance is deposited on the surface of the molded body. In particular, in the dark-colored products, since the choking component is conspicuous and whitish, the molded body to which these inorganic substances are added is not suitable for outdoor use due to the problem of deteriorating the appearance of the molded body.
JP-A-10-292080 JP 2002-80670 A

解決しようとする課題は、熱に対する線膨張性を低く抑えつつ、かつ機械的特性、耐候性にも優れた塩化ビニル系樹脂成形体を提供することにある。   The problem to be solved is to provide a vinyl chloride-based resin molded article that is excellent in mechanical properties and weather resistance while keeping the linear expansion against heat low.

本発明は、熱に対する線膨張性を低く抑えつつ、かつ機械的特性、耐候性にも優れた塩化ビニル系樹脂成形体を得るために、塩化ビニル系樹脂100重量部に対して、無機充填剤を5から100重量部添加することを最も主要な特徴とする。   The present invention provides an inorganic filler with respect to 100 parts by weight of a vinyl chloride resin in order to obtain a vinyl chloride resin molded article having excellent mechanical properties and weather resistance while keeping the linear expansion against heat low. The main feature is the addition of 5 to 100 parts by weight.

本発明により、機械的特性及び耐候性に優れ、熱に対する寸法変化が少ない、特に屋外での建材用途に適した塩化ビニル系樹脂成形体が得られる。   According to the present invention, it is possible to obtain a vinyl chloride resin molded article that is excellent in mechanical properties and weather resistance, has little dimensional change with respect to heat, and is particularly suitable for outdoor building materials.

以下に本発明を更に詳細に説明する。
本発明において使用される塩化ビニル系樹脂は、塩化ビニル単独重合体、塩化ビニル及び塩化ビニルと共重合可能な単量体との、塩化ビニルを50重量%以上含有する塩化ビニル系共重合体である。このような塩化ビニルと共重合可能な単量体としては、例えば、酢酸ビニル、プロピオン酸ビニル等のビニルエステル;アクリル酸、メタクリル酸;アクリル酸メチル、アクリル酸エチル等のアクリル酸エステル;メタクリル酸メチル、メタクリル酸エチル等のメタクリル酸エステル;エチレン、プロピレン等のオレフィン;アクリロニトリル;スチレン;塩化ビニリデン等が挙げられる。
The present invention is described in further detail below.
The vinyl chloride resin used in the present invention is a vinyl chloride homopolymer, a vinyl chloride copolymer containing 50% by weight or more of vinyl chloride with vinyl chloride and a monomer copolymerizable with vinyl chloride. is there. Examples of such monomers copolymerizable with vinyl chloride include vinyl esters such as vinyl acetate and vinyl propionate; acrylic acid and methacrylic acid; acrylic acid esters such as methyl acrylate and ethyl acrylate; methacrylic acid Examples thereof include methacrylic acid esters such as methyl and ethyl methacrylate; olefins such as ethylene and propylene; acrylonitrile; styrene; vinylidene chloride.

本発明における塩化ビニル系樹脂の平均重合度は400〜3,000の範囲であり、好ましくは平均重合度700〜1,300である。平均重合度が400未満では、得られる成形体の衝撃強度、引張り強度、伸び等の機械的特性に劣り、また、平均重合度が3,000を超えると成形時における塩化ビニル系樹脂の溶融粘度が高くなり成形が困難となる。溶融粘度を低下させるために成形温度を上昇させると、塩化ビニル系樹脂の分解を起こしてしまい、良好な成形体が得られない。   The average polymerization degree of the vinyl chloride resin in the present invention is in the range of 400 to 3,000, preferably 700 to 1,300. If the average degree of polymerization is less than 400, the resulting molded article is inferior in mechanical properties such as impact strength, tensile strength, and elongation. If the average degree of polymerization exceeds 3,000, the melt viscosity of the vinyl chloride resin at the time of molding. Becomes high and molding becomes difficult. If the molding temperature is raised to lower the melt viscosity, the vinyl chloride resin will be decomposed and a good molded product cannot be obtained.

本発明における目的の一つである、塩化ビニル系樹脂の線膨張を低く抑えるには、無機充填剤の添加が必須である。無機物質としては、粒状、層状あるいは繊維状のものが使用可能であり、特にアスペクト比の高いものが有効である。これらを挙げると、ガラス繊維、炭酸カルシウム、水酸化アルミニウム、水酸化マグネシウム、酸化チタン、シリカ、アルミナ、ウォラストナイト、ゾノトライト、セビオライト、ホウ酸アルミニウム、チタン酸カリウム、タルク、マイカ、クレー及びそれらから選ばれる1種または2種以上の添加が可能である。添加量は塩化ビニル系樹脂100重量部に対して5から100重量部、好ましくは、10から80重量部が必要である。5重量部未満では所定の線膨張率が得られず、100重量部を超えると、溶融粘度が著しく高くなり、成形が困難となる。塩化ビニル系樹脂との相溶性及び補強効果を向上させるために、上記無機充填剤表面に、例えば、シランカップリング剤、チタネート系カップリング剤、有機脂肪酸等を処理したものも使用できる。   In order to suppress the linear expansion of the vinyl chloride resin, which is one of the objects in the present invention, addition of an inorganic filler is essential. As the inorganic substance, granular, layered or fibrous materials can be used, and those having a particularly high aspect ratio are effective. These include glass fiber, calcium carbonate, aluminum hydroxide, magnesium hydroxide, titanium oxide, silica, alumina, wollastonite, zonotlite, ceviolite, aluminum borate, potassium titanate, talc, mica, clay and from them One or more selected additives can be added. The addition amount is 5 to 100 parts by weight, preferably 10 to 80 parts by weight, based on 100 parts by weight of the vinyl chloride resin. If the amount is less than 5 parts by weight, the predetermined linear expansion coefficient cannot be obtained. In order to improve the compatibility with the vinyl chloride resin and the reinforcing effect, for example, a surface obtained by treating the surface of the inorganic filler with a silane coupling agent, a titanate coupling agent, an organic fatty acid, or the like can be used.

これら、無機充填剤を添加することにより、線膨張率を4.0×10-5/℃以下に調整することが可能となり、本発明の成形体の線膨張率は、鉄、アルミニウム等の金属の値に近いものとなる。本発明で用いる成形体基材部の線膨係数は1.0〜4.0×10-5/℃の範囲にあることが好ましい。無機系充填剤を大量に添加した場合、機械的特性、特に、耐衝撃性が低下し、運搬、施工時及び使用時に破損する恐れがある。この様な場合、耐衝撃性改良剤が使用される。耐衝撃性改良剤としては、アクリロニトリル―ブタジエン―スチレン共重合体(ABS樹脂)、メタクリル酸メチル―ブタジエン―スチレン共重合体(MBS樹脂)、アクリル系ポリマー、塩素化ポリエチレン等のゴム状物を含む樹脂を用いることができる。これによりアイゾッド衝撃強度を5.0kJ/m2以上に調整することが可能である。成形体基材部のアイゾッド衝撃強度は5.0〜50kJ/m2の範囲にあることが好ましい。 By adding these inorganic fillers, it becomes possible to adjust the linear expansion coefficient to 4.0 × 10 −5 / ° C. or less, and the linear expansion coefficient of the molded body of the present invention is a metal such as iron or aluminum. It is close to the value of. The linear expansion coefficient of the molded body base used in the present invention is preferably in the range of 1.0 to 4.0 × 10 −5 / ° C. When a large amount of an inorganic filler is added, mechanical properties, particularly impact resistance, is reduced, and there is a risk of damage during transportation, construction, and use. In such cases, impact modifiers are used. Examples of impact modifiers include rubber-like materials such as acrylonitrile-butadiene-styrene copolymer (ABS resin), methyl methacrylate-butadiene-styrene copolymer (MBS resin), acrylic polymer, and chlorinated polyethylene. Resin can be used. Thereby, the Izod impact strength can be adjusted to 5.0 kJ / m 2 or more. It is preferable that the Izod impact strength of the molded body base is in the range of 5.0 to 50 kJ / m 2 .

上記塩化ビニル系樹脂を成形する際には、熱分解を抑制するために安定剤を添加する必要がある。安定剤としては、Pb系、Sn系、Ca/Zn系等の一般的に硬質塩化ビニル系樹脂に用いられるものが使用可能であるが、Sn系は液状であって、物性、特に熱的特性が低下する可能性があるため、Pb系、Ca/Zn系等の粉体系安定剤の使用がより好ましい。   When molding the vinyl chloride resin, it is necessary to add a stabilizer in order to suppress thermal decomposition. As stabilizers, those generally used for hard vinyl chloride resins such as Pb, Sn, and Ca / Zn can be used. However, Sn is liquid and has physical properties, particularly thermal characteristics. Therefore, it is more preferable to use a powder type stabilizer such as Pb type or Ca / Zn type.

また、耐熱性を向上させる目的で、塩素化塩化ビニル樹脂、耐熱性ABS樹脂、アクリロニトリル―スチレン共重合体(AS樹脂)、αメチルスチレン―スチレン―アクリロニトリル共重合体等の耐熱性向上剤を添加することも有効である。
その他、線膨張性、機械的特性、耐熱性、熱安定性、成形性等の特性を低下させない範囲で、安定化助剤、滑剤、難燃剤、着色剤などの添加剤を加えることもできる。
Addition of heat resistance improvers such as chlorinated vinyl chloride resin, heat resistant ABS resin, acrylonitrile-styrene copolymer (AS resin), α-methylstyrene-styrene-acrylonitrile copolymer for the purpose of improving heat resistance It is also effective to do.
In addition, additives such as a stabilizing aid, a lubricant, a flame retardant, and a colorant can be added within a range not deteriorating characteristics such as linear expansion, mechanical properties, heat resistance, thermal stability, and moldability.

無機系充填剤を大量に添加した場合、成形時の溶融粘度が高くなるため成形困難となる。本発明では、上記添加剤を調整して、フローテスターでの180℃における溶融粘度が、4.0×103Pa・s以下、好ましくは、0.5〜4.0×103Pa・sにすることにより、成形を容易にする。溶融粘度の調整には、特に塩化ビニル系樹脂の平均重合度及び滑剤による調整が有効である。 When a large amount of inorganic filler is added, the melt viscosity at the time of molding becomes high, which makes molding difficult. In the present invention, by adjusting the additive, the melt viscosity at 180 ° C. in a flow tester, 4.0 × 10 3 Pa · s or less, preferably, 0.5~4.0 × 10 3 Pa · s By making it easy to form. For adjusting the melt viscosity, it is particularly effective to adjust the average polymerization degree of the vinyl chloride resin and the lubricant.

本発明では線膨張率を低く抑えるために無機充填剤を添加する必要がある。塩化ビニル系樹脂は本来耐候性の高い樹脂であるが、無機充填剤の添加により、チョーキングが発生し易くなる。これを解決するのが本発明のもう一つの目的であり、そのために本発明では表層を耐候性の高い樹脂材質で被覆する。   In the present invention, it is necessary to add an inorganic filler in order to keep the linear expansion coefficient low. Vinyl chloride-based resins are inherently highly weather-resistant resins, but the addition of inorganic fillers tends to cause choking. It is another object of the present invention to solve this, and for this purpose, in the present invention, the surface layer is coated with a resin material having high weather resistance.

本発明における耐候性の高い樹脂材料としては、耐候性を高めた塩化ビニル系樹脂及びアクリル樹脂を使用する方法が挙げられる。
耐候性を高めた塩化ビニル系樹脂としては、塩化ビニル系樹脂に、(1)ベンゾフェノン系、ベンゾトリアゾール系、ベンゾエート系等の紫外線吸収剤、(2)フェノール系、リン酸系、イオウ系等の酸化防止剤、(3)水酸化銅、酸化銅、炭酸銅、硫酸銅、塩化銅等の無機銅化合物、有機カルボン酸、ベンゾトリアゾール系化合物の有機銅塩化物及びそれらとハイドロタルサイトとを併用したもの等のチョーキング防止剤などを添加したものが用いられる。また、成形体が白色系の場合には、ルチル型の酸化チタンまたは、それをシリカ、アルミナ等で表面処理したものの添加が効果的である。また、表層部の耐候性を更に高めるもう一つの方法として、アクリル樹脂による被覆も有効である。
本発明における、耐候性の高い樹脂材料は、耐候性試験の色差測定で、色差(ΔE)が、2.4以下、好ましくは、0.2〜1.5の範囲内のもが用いられる。
Examples of the resin material having high weather resistance in the present invention include a method using a vinyl chloride resin and an acrylic resin having improved weather resistance.
As vinyl chloride resins with improved weather resistance, vinyl chloride resins include (1) UV absorbers such as benzophenone, benzotriazole, and benzoate, and (2) phenol, phosphoric acid, and sulfur. Antioxidants, (3) Inorganic copper compounds such as copper hydroxide, copper oxide, copper carbonate, copper sulfate, copper chloride, organic carboxylic acids, organic copper chlorides of benzotriazole compounds and their combined use with hydrotalcite What added anti-choking agents etc., such as what was carried out, is used. In addition, when the molded body is white, it is effective to add rutile type titanium oxide or a surface-treated titanium oxide or the like. As another method for further improving the weather resistance of the surface layer portion, coating with an acrylic resin is also effective.
The resin material having high weather resistance in the present invention has a color difference (ΔE) of 2.4 or less, preferably 0.2 to 1.5 in the color difference measurement of the weather resistance test.

表層部の厚さは特に限定しないが、薄すぎると紫外線が透過して基材部にまで達する恐れがあるので、50μm以上が好ましい。しかし、一方、表層部は高価な配合剤または樹脂を用いるので、不必要に厚すぎると、コスト高となってしまうので、500μmを超えない値が好ましい。また、表層部には色彩、艶、木目調等を施すことにより、意匠性の高い成形体を得ることも可能である。
表層部及び基材部の成形方法及び基材部の被覆方法としては、塩化ビニル系樹脂等のプラスチックで一般的に用いられる成形法が可能であるが、中でも多層成形が容易で安定した生産が可能である押出成形が好ましい。
The thickness of the surface layer portion is not particularly limited, but if it is too thin, ultraviolet rays may be transmitted and reach the base material portion, so 50 μm or more is preferable. However, on the other hand, since an expensive compounding agent or resin is used for the surface layer portion, if it is unnecessarily too thick, the cost becomes high. Therefore, a value not exceeding 500 μm is preferable. Moreover, it is also possible to obtain a molded article with high designability by applying color, gloss, wood grain, etc. to the surface layer portion.
As a method for molding the surface layer portion and the base material portion and a method for coating the base material portion, a molding method generally used for plastics such as vinyl chloride resin is possible, but among them, multilayer molding is easy and stable production is possible. Extrusion that is possible is preferred.

以下に実施例を挙げて本発明を具体的に説明するが、本発明はこれらによって限定されるものではない。   EXAMPLES The present invention will be specifically described below with reference to examples, but the present invention is not limited to these examples.

実施例中で使用した各種配合剤の出所及びその特性、商品名は以下の通りである。なお、表1から表3の各配合剤の欄の数字は全て重量部である。
塩化ビニル樹脂
TK−800(信越化学工業製、平均重合度800)
TK−1,000(信越化学工業製、平均重合度1,000)
アクリル樹脂
アクリペット IR H50(三菱レイヨン製)
無機充填材
マイカ;300D(クラレ製)
炭酸カルシウム;NCC−1010(日東粉化工業製)
チタン酸カリウムウィスカー;ティスモ(大塚化学製)
ホウ酸アルミニウムウィスカー;アルボレックスY(四国化成工業製)
熱安定剤
三塩基性硫酸鉛;TS−E(日東化成工業製)
二塩基性ステアリン酸鉛;DBL(日東化成工業製)
ステアリン酸鉛;Pb−St(日東化成工業製)
ステアリン酸カルシウム;Ca−St(日本油脂製)
ステアリン酸亜鉛;Zn―st(日東化成工業製)
ジペンタエリスリトールアジピン酸エステル;プレンライザーST2(味の素製)
加工助剤、耐衝撃性改良剤
アクリル系加工助剤;P−570A(三菱レイヨン製)
P−551A(三菱レイヨン製)
アクリルゴム;S−2001(三菱レイヨン製)
MBS;C−223S(三菱レイヨン製)
その他の成分
エステル系滑剤;G−21(コグニス製)
ポリエチレン系滑剤;ハイワックス220MP(三井石油化学工業製)
紫外線吸収剤;チヌビンP(チバガイギー製)
チョーキング防止剤;ATC−7R(旭電化工業製)
顔料(ブラウン); MAICROLITH BROWN 5R−K/KP(チバ・スペシャルティ・ケミカルズ製)
酸化チタン;R3L−SN(堺化学製)
The origin of various compounding agents used in the examples, their characteristics, and trade names are as follows. In addition, all the numbers in the column of each compounding agent of Table 1 to Table 3 are parts by weight.
Vinyl chloride resin TK-800 (manufactured by Shin-Etsu Chemical Co., Ltd., average polymerization degree 800)
TK-1,000 (manufactured by Shin-Etsu Chemical Co., Ltd., average polymerization degree 1,000)
Acrylic resin Acrypet IR H50 (Mitsubishi Rayon)
Inorganic filler Mica; 300D (Kuraray)
Calcium carbonate; NCC-1010 (manufactured by Nitto Flour Industry)
Potassium titanate whisker; Tismo (Otsuka Chemical)
Aluminum borate whisker; Arborex Y (manufactured by Shikoku Chemicals)
Heat stabilizer Tribasic lead sulfate; TS-E (Nitto Kasei Kogyo)
Dibasic lead stearate; DBL (Nitto Kasei Kogyo)
Lead stearate; Pb-St (manufactured by Nitto Kasei Kogyo)
Calcium stearate; Ca-St (manufactured by NOF Corporation)
Zinc stearate; Zn-st (manufactured by Nitto Kasei Kogyo)
Dipentaerythritol adipic acid ester; Pleniser ST2 (Ajinomoto)
Processing aid, impact modifier Acrylic processing aid; P-570A (Mitsubishi Rayon)
P-551A (Mitsubishi Rayon)
Acrylic rubber; S-2001 (Mitsubishi Rayon)
MBS; C-223S (Mitsubishi Rayon)
Other ingredients Ester lubricant; G-21 (manufactured by Cognis)
Polyethylene lubricant; high wax 220MP (Mitsui Petrochemical Industries)
UV absorber; Tinuvin P (Ciba Geigy)
Anti-choking agent; ATC-7R (Asahi Denka Kogyo)
Pigment (Brown); MAICROLIGHT BROW 5R-K / KP (manufactured by Ciba Specialty Chemicals)
Titanium oxide; R3L-SN (manufactured by Sakai Chemical)

(表層部用塩化ビニル系樹脂コンパウンドの調製法)
表1に示した各配合剤を容量100リットルのミキサーで撹拌・混合し、ミキサー内の樹脂温度が120℃に達した時点で、容量200リットルのクーリングミキサーに排出し、得られたコンパウンドを50℃まで冷却した。
(Preparation method of vinyl chloride resin compound for surface layer)
Each compounding agent shown in Table 1 was agitated and mixed with a 100 liter mixer, and when the resin temperature in the mixer reached 120 ° C., the mixture was discharged into a 200 liter cooling mixer, and the resulting compound was mixed with 50 compounds. Cooled to ° C.

(表層材用塩化ビニル系樹脂コンパウンドの調製)
表1に示した各配合剤を、容量300リットルのミキサーに投入、撹拌・混合し、ミキサー内の樹脂温度が120℃に達した時点で、容量500リットルのクーリングミキサーに排出し、得られたコンパウンドを50℃まで冷却した。なお、
表1における表層材Dについては、アクリル系樹脂(アクリペットIRH50)を用いた。
(基材部用塩化ビニル系樹脂コンパウンドの調製)
表2及び表3に示した各配合剤を容量300リットルのミキサーに投入し、攪拌、混合し、ミキサー内の樹脂温度が120℃に達した時点で、容量500リトルのクーリングミキサー中に排出し、得られたコンパウンドを50℃まで冷却した。
(Preparation of vinyl chloride resin compound for surface material)
Each compounding agent shown in Table 1 was put into a 300 liter mixer, stirred and mixed, and when the resin temperature in the mixer reached 120 ° C., the mixture was discharged into a 500 liter cooling mixer. The compound was cooled to 50 ° C. In addition,
For the surface layer material D in Table 1, an acrylic resin (ACRYPET IRH50) was used.
(Preparation of vinyl chloride resin compound for base material)
Each compounding agent shown in Table 2 and Table 3 is put into a 300 liter mixer, stirred and mixed. When the resin temperature in the mixer reaches 120 ° C., it is discharged into a 500 liter cooling mixer. The resulting compound was cooled to 50 ° C.

(成形体の作製)
基材部用と表層部用の材料を50mmφ単軸押出成形機(ジー・エム・エンジニアリング製)2台を用いてそれぞれ混練し、溶融樹脂を中空異型金型に導入することにより二層押出成形を行った。金型部温度は195℃であった。成形体の表層部の厚さは0.2mm、基材部の厚さは2.4mmであった。
(Production of molded body)
Two-layer extrusion molding is performed by kneading the material for the base material and the surface layer using two 50mmφ single-screw extruders (manufactured by GM Engineering), respectively, and introducing the molten resin into a hollow mold. Went. The mold part temperature was 195 ° C. The thickness of the surface layer portion of the molded body was 0.2 mm, and the thickness of the base material portion was 2.4 mm.

(溶融粘度測定)
基材部用材料を6インチロールでシート化後、裁断し溶融粘度測定に供した。測定はフローテスター(CFT−500A:島津製作所製)を使用し、荷重:100kgf、ダイスノズル径:1mm、ダイスノズル長:10mm、プランジャー断面積:1cm2、温度:180℃の定温法で行った。
(Melt viscosity measurement)
The base material was formed into a sheet with a 6-inch roll, then cut and subjected to melt viscosity measurement. The measurement is performed by using a flow tester (CFT-500A: manufactured by Shimadzu Corporation) by a constant temperature method of load: 100 kgf, die nozzle diameter: 1 mm, die nozzle length: 10 mm, plunger cross-sectional area: 1 cm 2 , temperature: 180 ° C. It was.

(アイゾッド衝撃強度測定)
基材部用材料を6インチロールでシート化後、70tプレスで板を作製した。所定の大きさに切り出した後、フライス処理して測定に供した。測定法はJISK7110法(タイプAノッチ)で行った。
(Izod impact strength measurement)
After the base material was formed into a sheet with a 6-inch roll, a plate was produced with a 70 t press. After cutting out to a predetermined size, it was milled and subjected to measurement. The measuring method was JISK7110 method (type A notch).

(線膨張率測定)
基材部用材料を6インチロールでシート化後、70tプレスで板を作製した。所定の大きさに切り出した後、フライス処理して線膨張測定に供した。線膨張測定は熱機械試験機:TM−7000(アルバック理工製)を使用して行った。
(Measurement of linear expansion coefficient)
After the base material was formed into a sheet with a 6-inch roll, a plate was produced with a 70 t press. After cutting out to a predetermined size, it was milled and subjected to linear expansion measurement. The linear expansion measurement was performed using a thermomechanical tester: TM-7000 (manufactured by ULVAC-RIKO).

(耐候性試験)
表層部用材料と基材部用材料の共押出によって得られた成形体を所定の大きさに切り出して耐候性試験に供した。耐候性試験はアイスーパーUVテスターSUV−W231(岩崎電気製)で行った。試験時間は48時間であった。
(Weather resistance test)
A molded body obtained by co-extrusion of the surface layer material and the base material was cut into a predetermined size and subjected to a weather resistance test. The weather resistance test was conducted with an iSuper UV tester SUV-W231 (Iwasaki Electric Co., Ltd.). The test time was 48 hours.

(色差測定)
耐候性試験前後のサンプルの色差(ΔE)を、分光色差計:SE−2000(日本電色工業製)を使用して測定した。
(Color difference measurement)
The color difference (ΔE) of the sample before and after the weather resistance test was measured using a spectral color difference meter: SE-2000 (manufactured by Nippon Denshoku Industries Co., Ltd.).

(実施例の総括)
本発明の実施例及び比較例の結果を表2及び表3に示す。
実施例1から7は耐候性と機械的特性及び低線膨張性に優れていることが実証された。それに対して、無機充填剤を添加していない比較例1では耐候性には優れるが、線膨張率が高いことが示され、また、表層部に耐候性の劣る表層材Cを用いた比較例2では、機械的特性は優れるが、耐候性が劣ることが示され、また、表層部に耐候性の優れた原料を用いなかった比較例3、4では、機械的特性に優れ、低線膨張率であったが、チョーキングにより成形体の外観が大きく損なわれた。
以上の結果から、本発明の塩化ビニル系樹脂成形体は機械的特性、耐候性に優れ、且つ、低線膨張率を示すものであることが実証された。
(Summary of Examples)
Tables 2 and 3 show the results of Examples and Comparative Examples of the present invention.
Examples 1 to 7 were demonstrated to be excellent in weather resistance, mechanical properties, and low linear expansion. On the other hand, in Comparative Example 1 in which no inorganic filler was added, although the weather resistance was excellent, it was shown that the linear expansion coefficient was high, and the comparative example using the surface layer material C having poor weather resistance in the surface layer part 2 shows excellent mechanical properties but poor weather resistance, and Comparative Examples 3 and 4 in which a raw material having excellent weather resistance was not used for the surface layer portion had excellent mechanical properties and low linear expansion. However, the appearance of the molded product was greatly impaired by choking.
From the above results, it was demonstrated that the vinyl chloride resin molded article of the present invention is excellent in mechanical properties and weather resistance and exhibits a low coefficient of linear expansion.

Figure 2005028794
Figure 2005028794

Figure 2005028794
Figure 2005028794

Figure 2005028794
Figure 2005028794

Claims (8)

塩化ビニル系樹脂100重量部に対して、無機充填剤を5から100重量部添加することにより、成形体の線膨張率を低下させた、塩化ビニル系樹脂組成物の成形体基材部と、高耐候性樹脂材料の成形体表層部からなる成形体。   A molded body substrate portion of a vinyl chloride resin composition in which the linear expansion coefficient of the molded body is reduced by adding 5 to 100 parts by weight of an inorganic filler with respect to 100 parts by weight of the vinyl chloride resin, A molded body comprising a surface layer portion of a molded body of a highly weather-resistant resin material. 基材部が塩化ビニル系樹脂100重量部に対して、ガラス繊維、炭酸カルシウム、水酸化アルミニウム、水酸化マグネシウム、酸化チタン、シリカ、アルミナ、ウォラストナイト、ゾノトライト、セビオライト、ホウ酸アルミニウム、チタン酸カリウム、タルク、マイカ、クレーからなる群から選ばれる1種以上の無機充填剤を5から100重量部添加した塩化ビニル系樹脂組成物を成形したものであることを特徴とする請求項1に記載の成形体。 Base material is 100 parts by weight of vinyl chloride resin, glass fiber, calcium carbonate, aluminum hydroxide, magnesium hydroxide, titanium oxide, silica, alumina, wollastonite, zonotlite, ceviolite, aluminum borate, titanic acid The vinyl chloride resin composition obtained by adding 5 to 100 parts by weight of one or more inorganic fillers selected from the group consisting of potassium, talc, mica, and clay is molded. Molded body. 基材部の線膨張率が4.0×10-5/℃以下であることを特徴とする請求項1または請求項2に記載の成形体。 The linear expansion coefficient of a base material part is 4.0 * 10 < -5 > / degrees C or less, The molded object of Claim 1 or Claim 2 characterized by the above-mentioned. 基材部原料の塩化ビニル系樹脂組成物のフローテスターによる180℃における溶融粘度が、4.0×103Pa・s以下であることを特徴とする請求項1から3の何れか1項に記載の成形体 4. The melt viscosity at 180 ° C. by a flow tester of the vinyl chloride resin composition as the base material is 4.0 × 10 3 Pa · s or less. 5. The molded body described 基材部原料の塩化ビニル系樹脂組成物のアイゾット衝撃強度が5.0kJ/m2以上であることを特徴とする請求項1から4の何れか1項に記載の成形体。 The molded article according to any one of claims 1 to 4, wherein an Izod impact strength of the vinyl chloride resin composition of the base material is 5.0 kJ / m 2 or more. 表層部が耐候性の高い塩化ビニル系樹脂組成物の成形体からなることを特徴とする請求項1から5の何れか1項に記載の成形体。   The molded body according to any one of claims 1 to 5, wherein the surface layer portion is formed of a molded article of a vinyl chloride resin composition having high weather resistance. 表層部がアクリル系樹脂成形体からなることを特徴とする請求項1から5の何れか1項に記載の成形体。   The molded body according to any one of claims 1 to 5, wherein the surface layer portion comprises an acrylic resin molded body. 屋外用建材に使用することを特徴とする請求項1から7の何れか1項に記載の成形体。   The molded article according to any one of claims 1 to 7, wherein the molded article is used for an outdoor building material.
JP2003271857A 2003-07-08 2003-07-08 Vinyl chloride resin molding Pending JP2005028794A (en)

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Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2007253430A (en) * 2006-03-23 2007-10-04 Mitsubishi Plastics Ind Ltd Vinyl chloride type resin laminate and its manufacturing method

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2007253430A (en) * 2006-03-23 2007-10-04 Mitsubishi Plastics Ind Ltd Vinyl chloride type resin laminate and its manufacturing method

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