JP2006249176A - Resin composition - Google Patents
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- JP2006249176A JP2006249176A JP2005065295A JP2005065295A JP2006249176A JP 2006249176 A JP2006249176 A JP 2006249176A JP 2005065295 A JP2005065295 A JP 2005065295A JP 2005065295 A JP2005065295 A JP 2005065295A JP 2006249176 A JP2006249176 A JP 2006249176A
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- polyethylene terephthalate
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Abstract
Description
本発明は樹脂組成物、とくに透明性、耐熱性、及びシート形状からの熱成形性に優れたポリエステル系樹脂組成物に関する。 The present invention relates to a resin composition, particularly a polyester resin composition excellent in transparency, heat resistance, and thermoformability from a sheet shape.
ポリエチレンテレフタレートは優れた透明性と表面光沢を有し、飲料水のボトル、食品の包装材などに広く利用されている。そのため、家庭などから廃棄物として出されるポリエチレンテレフタレートの量も増加しているため、これをリサイクルして繊維製品、シート・フィルムなどの原料として利用されている。 Polyethylene terephthalate has excellent transparency and surface gloss, and is widely used in drinking water bottles, food packaging materials, and the like. For this reason, since the amount of polyethylene terephthalate discharged from households and the like is increasing, it is recycled and used as a raw material for textiles, sheets and films.
しかしながらポリエチレンテレフタレートは、透明性はあるものの耐熱性に乏しく、耐熱性を必要とする用途、例えば電子部品搬送用のキャリアテープやキャリアトレイには使用できないという問題がある。 However, although polyethylene terephthalate is transparent, it has poor heat resistance and has a problem that it cannot be used in applications requiring heat resistance, such as carrier tapes and carrier trays for transporting electronic components.
そこで、耐熱性を向上させるためにポリカーボネート樹脂を添加することが考えられる。この場合、ポリエチレンテレフタレートにポリカーボネート樹脂を配合した組成物より得られるシート・フィルムにおいて耐熱性の向上は見られるものの、上記のキャリアテープなどに用いるため所望の形状に熱成形しようとすると、シートを加熱する際にポリエチレンテレフタレートの結晶化による白化がみられ所望の製品を得ることができないという別の問題が発生する。 Therefore, it is conceivable to add a polycarbonate resin in order to improve heat resistance. In this case, although heat resistance is improved in a sheet / film obtained from a composition in which a polycarbonate resin is blended with polyethylene terephthalate, the sheet is heated when attempting to thermoform it into a desired shape for use in the carrier tape or the like. In this case, whitening due to crystallization of polyethylene terephthalate is observed, and another problem that a desired product cannot be obtained occurs.
本発明は、上記問題を解決し、ポリエチレンテレフタレートの透明性を維持し、耐熱性及びシート形状からの熱成形性に優れたポリエステル系樹脂組成物を提供することを目的とする。 An object of the present invention is to solve the above problems, and to provide a polyester resin composition that maintains the transparency of polyethylene terephthalate and is excellent in heat resistance and thermoformability from a sheet shape.
本発明者は、ポリエチレンテレフタレートにポリカーボネート樹脂および特定のポリエステルを添加することにより上記目的が達成できることを見出したものである。つまり、本発明は、ポリエステル系樹脂とポリカーボネート樹脂とが配合された樹脂組成物で、このポリエステル系樹脂とポリカーボネート樹脂との配合比が６０〜４０／４０〜６０であり、ポリエステル系樹脂は、ポリエチレンテレフタレート（Ａ）及び、テレフタル酸からなるジカルボン酸成分と、５０〜６０モル％の１、４−シクロヘキサンジメタノ−ルと５０〜４０モル％のエチレングリコ−ルからなるジオール成分とから構成されたポリエステル（Ｂ）との混合物であり、（Ａ）／（Ｂ）が４２〜８５／５８〜１５であることを特徴とする樹脂組成物を要旨とする。 The present inventor has found that the above object can be achieved by adding a polycarbonate resin and a specific polyester to polyethylene terephthalate. That is, the present invention is a resin composition in which a polyester resin and a polycarbonate resin are blended. The blend ratio of the polyester resin and the polycarbonate resin is 60 to 40/40 to 60, and the polyester resin is polyethylene. It was composed of terephthalate (A) and a dicarboxylic acid component composed of terephthalic acid, and a diol component composed of 50 to 60 mol% 1,4-cyclohexanedimethanol and 50 to 40 mol% ethylene glycol. The gist of the resin composition is a mixture with polyester (B), wherein (A) / (B) is 42 to 85/58 to 15.
上記の通り、本発明の樹脂組成物は、ポリエチレンテレフタレート（Ａ）とポリエステル（Ｂ）とからなるポリエステル系樹脂にポリカーボネート樹脂を配合することにより、ポリエチレンテレフタレート樹脂の透明性を維持しつつ、耐熱性およびシート形状からの熱成形性の向上が図られ、家庭などから回収されたポリエチレンテレフタレートをより広い用途に利用できる。 As described above, the resin composition of the present invention has heat resistance while maintaining the transparency of the polyethylene terephthalate resin by blending the polycarbonate resin with the polyester resin composed of the polyethylene terephthalate (A) and the polyester (B). Further, the thermoformability is improved from the sheet shape, and the polyethylene terephthalate collected from homes can be used for a wider range of applications.
本発明のポリエステル系樹脂は、ポリエチレンテレフタレート（Ａ）と、テレフタル酸からなるジカルボン酸成分と、５０〜６０モル％の１、４−シクロヘキサンジメタノ−ルと５０〜４０モル％のエチレングリコ−ルからなるジオール成分とから構成されたポリエステル（Ｂ）とよりなり、（Ａ）／（Ｂ）が４２〜８５／５８〜１５である必要がある。ポリエチレンテレフタレート（Ａ）の比率が８５％を超えると透明性を損なう。また、シート形状のものを熱成形する際、予め加熱してゆくとポリエチレンテレフタレートの結晶化が進行し、シートが固化してしまうためあるいは白化現象がみられるため、熱成形性が損なわれるので好ましくない。逆に４２％未満では、熱成形の際、加熱時にシートのドローダウンが大きくなり易く、熱成形品にシワが発生し易くなるので好ましくない。 The polyester resin of the present invention comprises polyethylene terephthalate (A), a dicarboxylic acid component comprising terephthalic acid, 50 to 60 mol% 1,4-cyclohexanedimethanol and 50 to 40 mol% ethylene glycol. It is necessary to be (A) / (B) 42-85 / 58-15. When the ratio of polyethylene terephthalate (A) exceeds 85%, transparency is impaired. In addition, when thermoforming a sheet-shaped material, crystallization of polyethylene terephthalate proceeds in advance, and the sheet solidifies or a whitening phenomenon is observed. Absent. On the other hand, if it is less than 42%, during thermoforming, the drawdown of the sheet tends to increase during heating, and wrinkles tend to occur in the thermoformed product, which is not preferable.
本発明のポリエステル系樹脂とポリカーボネート樹脂との配合比は、６０〜４０／４０〜６０である必要がある。ポリカーボネート樹脂の比率が４０％未満では耐熱性に劣り好ましくない。逆に６０％を超えると、シートを所望の形状に熱成形する際、加熱に要する時間が長くなり、結晶化・白化の抑制が困難で、熱成形品が得られにくいので好ましくない。 The compounding ratio of the polyester resin and the polycarbonate resin of the present invention needs to be 60 to 40/40 to 60. If the ratio of the polycarbonate resin is less than 40%, the heat resistance is inferior, which is not preferable. On the other hand, if it exceeds 60%, when the sheet is thermoformed into a desired shape, the time required for heating becomes long, it is difficult to suppress crystallization and whitening, and it is difficult to obtain a thermoformed product, which is not preferable.
本発明の樹脂組成物は、通常の押出成形によりシート形状の製品とすることができ、この製品を真空成形等の熱成形により所望の形状の成形品を得ることができる。 The resin composition of the present invention can be made into a sheet-shaped product by ordinary extrusion molding, and a molded product having a desired shape can be obtained by thermoforming such as vacuum molding.
この発明の具体的実施例、比較例について説明する。用いた原料は次の通りである。 Specific examples and comparative examples of the present invention will be described. The raw materials used are as follows.
ポリカーボネート樹脂：商品名「Ｌ−１２５０ＷＱ」、帝人化成社製
ポリエチレンテレフタレート（Ａ）：回収されたボトルからの再生ポリエチレンテレフタレート
ポリエステル（Ｂ）：商品名「ＳＫＹＧＲＥＥＮ Ｊ２００３」、ＳＫケミカル社製
Polycarbonate resin: Trade name “L-1250WQ”, manufactured by Teijin Chemicals Co., Ltd. Polyethylene terephthalate (A): Recycled polyethylene terephthalate from recovered bottle Polyester (B): Trade name “SKYGREEN J2003”, manufactured by SK Chemicals
＜実施例１〜５、比較例１〜８＞
上記各原料を表１および表２に示した配合割合で混合し、押出成形することにより厚さ０．５ｍｍのシートを得た。得られたシートについて、ＡＳＴＭ Ｄ１００３に準じてヘーズを測定することにより透明性を評価した。また熱成形性の評価として、得られたシートを展開倍率２倍の雄型を用い、ヒーター温度４００〜４２０℃で真空成形した。透明性を保ち真空成形できたものを○、真空成形できるがシワの発生しやすいものを△、結晶化が進行し固化してしまい真空成形できない、あるいはある程度真空成形できても結晶化による白化がみられたものを×と評価した。別に上記配合原料を射出成形することにより、荷重たわみ温度（ＪＩＳ Ｋ７１９１）の試験片を作製し同温度を測定した。これら結果を表１および表２に示す。
<Examples 1-5, Comparative Examples 1-8>
The above raw materials were mixed at the blending ratios shown in Tables 1 and 2, and extruded to obtain a sheet having a thickness of 0.5 mm. The obtained sheet was evaluated for transparency by measuring haze according to ASTM D1003. In addition, as an evaluation of thermoformability, the obtained sheet was vacuum-formed at a heater temperature of 400 to 420 ° C. using a male mold having a double expansion ratio. ○ which can be vacuum-formed while maintaining transparency, △ which can be vacuum-formed but easily wrinkled, crystallization progresses and solidifies and cannot be vacuum-formed, or even if it can be vacuum-formed to some extent, whitening due to crystallization What was seen was evaluated as x. Separately, a test piece having a deflection temperature under load (JIS K7191) was produced by injection molding the above-described blended raw material, and the same temperature was measured. These results are shown in Tables 1 and 2.
表１および表２から明らかなように、本発明に係る実施例１〜５においては、熱成形が可能であり、併せて透明性、耐熱性においても優れていることがわかる。これに対し、ポリエチレンテレフタレート（Ａ）とポリエステル（Ｂ）との比率が本発明の技術範囲を逸脱する比較例１〜４においては、熱成形性と透明性ともに、あるいは何れかが劣るといった問題がある。また、ポリエステル系樹脂とポリカーボネート樹脂との配合比率が本発明の技術範囲外である比較例５〜８においては、熱成形性あるいは耐熱性に劣ることがわかる。 As is apparent from Tables 1 and 2, in Examples 1 to 5 according to the present invention, it can be seen that thermoforming is possible and that both transparency and heat resistance are excellent. On the other hand, in Comparative Examples 1 to 4 in which the ratio of the polyethylene terephthalate (A) to the polyester (B) deviates from the technical scope of the present invention, there is a problem that either the thermoformability and the transparency are inferior. is there. Moreover, it turns out that it is inferior to thermoformability or heat resistance in the comparative examples 5-8 whose compounding ratio of a polyester-type resin and polycarbonate resin is outside the technical scope of this invention.
Claims (1)
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP2005065295A JP2006249176A (en) | 2005-03-09 | 2005-03-09 | Resin composition |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP2005065295A JP2006249176A (en) | 2005-03-09 | 2005-03-09 | Resin composition |
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| Publication Number | Publication Date |
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| JP2006249176A true JP2006249176A (en) | 2006-09-21 |
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| JP2005065295A Pending JP2006249176A (en) | 2005-03-09 | 2005-03-09 | Resin composition |
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Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2007231200A (en) * | 2006-03-02 | 2007-09-13 | Mitsubishi Plastics Ind Ltd | Thermoplastic resin sheet |
| KR100856747B1 (en) | 2007-07-04 | 2008-09-04 | 에스케이케미칼주식회사 | Blend of polyester with polycarbonate having superior transparency and heat resistance |
| JP2013540875A (en) * | 2010-10-28 | 2013-11-07 | エスケー ケミカルズ カンパニー リミテッド | Polyester / polycarbonate blend with excellent thermal and color stability |
| WO2014017415A1 (en) | 2012-07-24 | 2014-01-30 | 三菱瓦斯化学株式会社 | Thermoplastic resin composition and sheet using same |
| KR101405869B1 (en) * | 2007-07-19 | 2014-06-12 | 에스케이케미칼주식회사 | Method for Preparing Polyester/Polycarbonate Blend with Advanced Color Stability |
Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH03244656A (en) * | 1990-02-23 | 1991-10-31 | Toyobo Co Ltd | Polyester resin composition, and packaging material made therefrom |
| JPH03259952A (en) * | 1990-03-12 | 1991-11-20 | Toyobo Co Ltd | Polyester resin composition and packaging material made therefrom |
| JPH06228425A (en) * | 1993-02-05 | 1994-08-16 | Toyobo Co Ltd | Polyester resin composition and packing material using the same |
| JP2002012748A (en) * | 2000-06-29 | 2002-01-15 | Tsutsunaka Plast Ind Co Ltd | Resin composition |
-
2005
- 2005-03-09 JP JP2005065295A patent/JP2006249176A/en active Pending
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH03244656A (en) * | 1990-02-23 | 1991-10-31 | Toyobo Co Ltd | Polyester resin composition, and packaging material made therefrom |
| JPH03259952A (en) * | 1990-03-12 | 1991-11-20 | Toyobo Co Ltd | Polyester resin composition and packaging material made therefrom |
| JPH06228425A (en) * | 1993-02-05 | 1994-08-16 | Toyobo Co Ltd | Polyester resin composition and packing material using the same |
| JP2002012748A (en) * | 2000-06-29 | 2002-01-15 | Tsutsunaka Plast Ind Co Ltd | Resin composition |
Cited By (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2007231200A (en) * | 2006-03-02 | 2007-09-13 | Mitsubishi Plastics Ind Ltd | Thermoplastic resin sheet |
| KR100856747B1 (en) | 2007-07-04 | 2008-09-04 | 에스케이케미칼주식회사 | Blend of polyester with polycarbonate having superior transparency and heat resistance |
| WO2009005318A1 (en) * | 2007-07-04 | 2009-01-08 | Sk Chemicals Co., Ltd. | Blend of polyester and polycarbonate having transparency and heat resistance |
| JP2010532407A (en) * | 2007-07-04 | 2010-10-07 | エスケー ケミカルズ カンパニー リミテッド | Polyester / polycarbonate blend with transparency and heat resistance |
| KR101405869B1 (en) * | 2007-07-19 | 2014-06-12 | 에스케이케미칼주식회사 | Method for Preparing Polyester/Polycarbonate Blend with Advanced Color Stability |
| JP2013540875A (en) * | 2010-10-28 | 2013-11-07 | エスケー ケミカルズ カンパニー リミテッド | Polyester / polycarbonate blend with excellent thermal and color stability |
| WO2014017415A1 (en) | 2012-07-24 | 2014-01-30 | 三菱瓦斯化学株式会社 | Thermoplastic resin composition and sheet using same |
| US9453127B2 (en) | 2012-07-24 | 2016-09-27 | Mitsubishi Gas Chemical Company, Inc. | Thermoplastic resin composition and sheet using same |
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