JP2003192816A - Polyethylene terephthalate-based resin composition and foam molding method for the same - Google Patents
Polyethylene terephthalate-based resin composition and foam molding method for the sameInfo
- Publication number
- JP2003192816A JP2003192816A JP2001399628A JP2001399628A JP2003192816A JP 2003192816 A JP2003192816 A JP 2003192816A JP 2001399628 A JP2001399628 A JP 2001399628A JP 2001399628 A JP2001399628 A JP 2001399628A JP 2003192816 A JP2003192816 A JP 2003192816A
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- Japan
- Prior art keywords
- polyethylene terephthalate
- resin composition
- weight
- parts
- terephthalate 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.)
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- Manufacture Of Porous Articles, And Recovery And Treatment Of Waste Products (AREA)
- Extrusion Moulding Of Plastics Or The Like (AREA)
- Molding Of Porous Articles (AREA)
Abstract
Description
【０００１】[0001]
【発明の属する技術分野】本発明は、ポリエチレンテレ
フタレート系樹脂組成物及びその発泡成形方法に関し、
更に詳しくは、成形性が良好で、表面性及び耐衝撃性に
優れた発泡成形体を与えるポリエチレンテレフタレート
系樹脂組成物及びその発泡成形方法に関する。TECHNICAL FIELD The present invention relates to a polyethylene terephthalate resin composition and a foam molding method thereof,
More specifically, the present invention relates to a polyethylene terephthalate resin composition which gives a foamed molded product having good moldability and excellent surface properties and impact resistance, and a foam molding method thereof.
【０００２】[0002]
【従来の技術】ポリエチレンテレフタレート系樹脂（以
下、ペット樹脂と記す）は、機械的性質や化学的性質に
優れているため、延伸配向により結晶化と機械的強度を
向上させたペット繊維及びペットフィルム、延伸ブロー
成形によるペットボトルの用途等に広く利用されてい
る。しかしながら、これらの加工方法は、いずれもペッ
ト樹脂の結晶性を利用して延伸配向による強度向上を達
成したものであり、これらの延伸による加工方法以外の
押出成形、特に低発泡（異形）押出成形に関しては、ほ
とんど注目されていないのが実情である。2. Description of the Related Art Polyethylene terephthalate resin (hereinafter referred to as "pet resin") is excellent in mechanical properties and chemical properties. Therefore, PET fiber and pet film improved in crystallization and mechanical strength by stretch orientation. It is widely used for PET bottles by stretch blow molding. However, all of these processing methods utilize the crystallinity of PET resin to achieve strength improvement by stretching orientation, and extrusion molding other than processing methods by these stretching, especially low foaming (profile) extrusion molding As for, the fact is that little attention is paid to it.
【０００３】我が国では、平成１２年４月から「容器包
装に係る分別収集及び再商品化の促進等に関する法律」
が施行されているが、例えば、膨大な量のペットボトル
のリサイクルについては、従来のような延伸配向による
繊維、フィルム及びブロー成形以外の新規加工技術につ
いては、殆ど提案されていないのが現状である。例え
ば、特開平２００１−１２９８６７号公報には、リサイ
クルＰＥＴ樹脂を用いた発泡体の製造方法が提案されて
いるが、廃棄の際の焼却炉を傷めないように、プラスチ
ック成分比率を３０％以下に抑えることを特徴とするも
ので、また緩衝材や断熱材の所謂高発泡体の製造を目的
とするものである。In Japan, since April 2000, "Law concerning the separate collection of containers and packaging and promotion of recycling"
However, for the recycling of enormous amounts of PET bottles, for example, fibers, films, and new processing techniques other than blow molding by conventional stretch orientation have hardly been proposed at present. is there. For example, Japanese Unexamined Patent Publication No. 2001-129867 proposes a method for producing a foam using a recycled PET resin. However, in order not to damage the incinerator at the time of disposal, the plastic component ratio is 30% or less. The present invention is characterized in that it is suppressed, and the purpose is to manufacture a so-called high foam material such as a cushioning material and a heat insulating material.
【０００４】[0004]
【発明が解決しようとする課題】ペット樹脂を押出成形
する場合、ペット樹脂の特性によりドローダウンが大き
く、溶融体での形状保持及びサイジングダイでの賦形が
困難である。またペット樹脂は溶融粘度、溶融張力が低
いため、発泡剤の分解ガス圧にセルが耐え切れず破泡し
てしまい、表面が平滑で正常なスキン層を有する独立起
泡の発泡体が得られない、という問題を含んでいる。更
に、ペット樹脂は分子内にエステル結合を有するため、
成形時にエステル結合が加水分解され、機械的強度、特
に耐衝撃性が低下するという問題もあり、これがリサイ
クルペット樹脂の再利用を妨げる原因の一つとなってい
る。When a PET resin is extrusion-molded, a drawdown is large due to the characteristics of the PET resin, and it is difficult to maintain the shape in the melt and shape it in the sizing die. In addition, since the PET resin has a low melt viscosity and melt tension, the cell cannot withstand the decomposition gas pressure of the foaming agent and the cells are broken, resulting in an independent foam having a smooth surface and a normal skin layer. There is a problem that there is no. Furthermore, since PET resin has an ester bond in the molecule,
There is also a problem that the ester bond is hydrolyzed at the time of molding, and the mechanical strength, particularly the impact resistance is lowered, which is one of the causes that hinder the reuse of recycled PET resin.
【０００５】本発明はかかる実情に鑑み、上記の如き従
来技術の問題を解決し、成形性が良好で、表面性、耐衝
撃性に優れた発泡成形体を与える樹脂組成物及びその発
泡成形方法を提供するものである。In view of the above circumstances, the present invention solves the above-mentioned problems of the prior art, and provides a resin composition which gives a foamed molded product having good moldability, surface properties and impact resistance, and a foam molding method thereof. Is provided.
【０００６】[0006]
【課題を解決するための手段】本発明者は上記課題を解
決するべく鋭意研究の結果、特定の改質剤と特定の加工
助剤を配合することにより、所期の目的が達成されるこ
とを見い出し本発明に到達したものである。Means for Solving the Problems As a result of intensive research to solve the above problems, the present inventor has achieved a desired object by blending a specific modifier and a specific processing aid. They have found the present invention and reached the present invention.
【０００７】即ち、本発明の請求項１は、ペット樹脂
（Ａ）、スチレン系エラストマー改質剤及び／又はアク
リル系改質剤（Ｂ）、アクリル系ＰＴＦＥ加工助剤
（Ｃ）及び発泡剤（Ｄ）からなることを特徴とするペッ
ト樹脂組成物を内容とする。That is, the first aspect of the present invention is that the pet resin (A), the styrene elastomer modifier and / or the acrylic modifier (B), the acrylic PTFE processing aid (C) and the foaming agent ( A pet resin composition comprising D).
【０００８】本発明の請求項２は、更に、カルボジイミ
ドからなる加水分解抑制剤（Ｅ）を配合してなる請求項
１記載のペット樹脂組成物を内容とする。A second aspect of the present invention further includes the pet resin composition according to the first aspect, further comprising a hydrolysis inhibitor (E) made of carbodiimide.
【０００９】本発明の請求項３は、（Ａ）成分が６０〜
１００重量部、（Ｂ）成分が５〜４０重量部、（Ｃ）成
分及び（Ｄ）成分が、（Ａ）成分と（Ｂ）成分との合計
１００重量部に対し、それぞれ１〜１０重量部及び０．
１〜５重量部である請求項１記載のペット樹脂組成物を
内容とする。In the third aspect of the present invention, the component (A) is 60 to 60%.
100 parts by weight, 5 to 40 parts by weight of the component (B), 1 to 10 parts by weight of the components (C) and (D) with respect to 100 parts by weight of the total of the components (A) and (B). And 0.
The pet resin composition according to claim 1, which is 1 to 5 parts by weight.
【００１０】本発明の請求項４は、（Ｅ）成分が、
（Ａ）成分と（Ｂ）との合計１００重量部に対し、１〜
３重量部である請求項２記載のペット樹脂組成物を内容
とする。According to claim 4 of the present invention, the component (E) is
1 to 100 parts by weight of the total of the component (A) and the component (B)
The pet resin composition according to claim 2, which is 3 parts by weight.
【００１１】本発明の請求項５は、ペット樹脂（Ａ）
が、リサイクルペット樹脂である請求項１〜４のいずれ
か１項に記載のペット樹脂組成物を内容とする。A fifth aspect of the present invention is a pet resin (A).
Is a recycled pet resin, and the pet resin composition according to any one of claims 1 to 4 is included.
【００１２】本発明の請求項６は、請求項１〜４のいず
れか１項に記載のペット樹脂組成物を押出成形機により
混練、加熱、溶融して大気中に押し出すことを特徴とす
るペット樹脂組成物の発泡成形方法を内容とする。A sixth aspect of the present invention is characterized in that the pet resin composition according to any one of the first to fourth aspects is kneaded, heated and melted by an extruder and extruded into the atmosphere. A foam molding method for a resin composition is provided.
【００１３】本発明の請求項７は、発泡倍率が２倍以下
である請求項６記載のペット樹脂組成物の発泡成形方法
を内容とする。A seventh aspect of the present invention relates to a method for foam-molding a pet resin composition according to the sixth aspect, wherein the expansion ratio is 2 times or less.
【００１４】[0014]
【発明の実施の形態】本発明に用いられるペット樹脂は
好ましくは８０％以上のエチレンテレフタレート繰り返
し単位を含むものが用いられる。エチレンテレフタレー
トの繰り返し単位が８０％未満では、ペット樹脂の特徴
である優れた機械的性質、化学的性質が十分に発揮され
ない傾向がある。本発明においては、リサイクルペット
樹脂も好適に用いることができ、エコマーク認定基準で
あるリサイクルペット樹脂の含有量７０％以上をクリア
ーすることも可能である。BEST MODE FOR CARRYING OUT THE INVENTION The PET resin used in the present invention preferably contains 80% or more of ethylene terephthalate repeating units. When the repeating unit of ethylene terephthalate is less than 80%, the excellent mechanical properties and chemical properties, which are characteristics of the PET resin, tend not to be sufficiently exhibited. In the present invention, recycled pet resin can also be suitably used, and it is possible to meet the content of recycled pet resin of 70% or more, which is the Eco Mark certification standard.
【００１５】本発明に用いられる（Ｂ）成分であるスチ
レン系エラストマーからなる改質剤としては、例えば、
アロン化成株式会社製の「ＡＲＰ−１１００」（商品
名）、アクリル系改質剤としては、例えば、三菱レイヨ
ン株式会社製の「メタブレンＳＨ−１６）（商品名）等
が挙げられ、これらは、単独又は組み合わせて用いられ
る。Examples of the modifier (B) used in the present invention, which comprises the styrene elastomer, include:
"ARP-1100" (trade name) manufactured by Aron Kasei Co., Ltd., and examples of the acrylic modifier include "Metablene SH-16" (trade name) manufactured by Mitsubishi Rayon Co., Ltd. Used alone or in combination.
【００１６】本発明に用いられるアクリル系ＰＴＦＥ
（ポリテトラフルオロエチレン）加工助剤（Ｃ）として
は、例えば、三菱レイヨン株式会社製の「メタブレンＡ
−３０００」（商品名）が挙げられる。Acrylic PTFE used in the present invention
Examples of the (polytetrafluoroethylene) processing aid (C) include “Metablene A” manufactured by Mitsubishi Rayon Co., Ltd.
-3000 "(trade name).
【００１７】本発明に用いられる発泡剤（Ｄ）として
は、例えば、重炭酸ナトリウム、炭酸ナトリウム、重炭
酸アンモニウム、炭酸アンモニウム等の無機系発泡剤、
Ｎ，Ｎ′−ジメチル−Ｎ，Ｎ′−ジニトロソ・テレフタ
ルアミド、Ｎ，Ｎ′−ジニトロソ・ペンタメチレン・テ
トラミン等のニトロソ化合物、アゾジカルボンアミド、
アゾジカルボキサミド、アゾビスイソブチロトリル、ア
ゾジアミノベンゼン、バリウム・アゾジカルボキシレー
ト等の化合物、ベンゼンスルホニルヒドラジド、トルエ
ンスルホニルヒドラジド、Ｐ，Ｐ′−オキシビス等のス
ルホニルヒドラジド化合物、カルシウムアジド、４，
４′−ジフェニルジスルホニルアジド、ｐ−トルエンス
ルホニルアジド等のアジド化合物等が挙げられ、これら
は単独で又は必要に応じ２種以上組み合わせて用いられ
る。Examples of the foaming agent (D) used in the present invention include inorganic foaming agents such as sodium bicarbonate, sodium carbonate, ammonium bicarbonate and ammonium carbonate,
Nitroso compounds such as N, N'-dimethyl-N, N'-dinitroso terephthalamide, N, N'-dinitroso pentamethylene tetramine, azodicarbonamide,
Compounds such as azodicarboxamide, azobisisobutyrotolyl, azodiaminobenzene, barium azodicarboxylate, benzenesulfonyl hydrazide, toluenesulfonyl hydrazide, sulfonyl hydrazide compounds such as P, P'-oxybis, calcium azide, 4,
Examples thereof include azide compounds such as 4′-diphenyldisulfonyl azide and p-toluenesulfonyl azide, and these may be used alone or in combination of two or more as necessary.
【００１８】本発明のペット樹脂組成物における
（Ａ）、（Ｂ）、（Ｃ）、（Ｄ）各成分の配合割合は、
（Ａ）成分が５０〜１００重量部、好ましくは７０〜９
０重量部、（Ｂ）成分が５〜４０重量部、好ましくは１
０〜３０重量部、（Ｃ）成分が、（Ａ）成分と（Ｂ）成
分との合計１００重量部に対し１〜１０重量部、好まし
くは２〜５重量部、及び（Ｄ）成分が、（Ａ）成分と
（Ｂ）成分との合計１００重量部に対して、０．１〜５
重量部、好ましくは０．３〜３重量部である。（Ａ）〜
（Ｄ）の各成分が上記範囲外となると、本発明の目的と
する、成形性が良好で、表面性、耐衝撃性に優れた発泡
成形体を与えるペット樹脂組成物が得られ難い。The proportions of the components (A), (B), (C) and (D) in the pet resin composition of the present invention are as follows:
Component (A) is 50 to 100 parts by weight, preferably 70 to 9
0 parts by weight, 5 to 40 parts by weight of component (B), preferably 1
0 to 30 parts by weight, the component (C) is 1 to 10 parts by weight, preferably 2 to 5 parts by weight, and the component (D) is based on 100 parts by weight of the total of the components (A) and (B). 0.1 to 5 per 100 parts by weight of the total of the components (A) and (B).
Parts by weight, preferably 0.3 to 3 parts by weight. (A) ~
When each component of (D) is out of the above range, it is difficult to obtain a pet resin composition which is an object of the present invention and which gives a foamed molded product having good moldability and excellent surface properties and impact resistance.
【００１９】本発明のペット樹脂組成物は、更に、加水
分解抑制剤（Ｅ）を含有させることができ、これにより
ペットが加水分解されて低分子量化することにより、溶
融粘度が低下したり、耐衝撃性が低下することが防止さ
れる。このような加水分解抑制剤としては、例えば、日
清紡株式会社製の「カルボジライト」（商品名）が挙げ
られる。（Ｅ）成分の配合量は、上記（Ａ）成分と
（Ｂ）成分との合計１００重量部に対し、１〜３重量
部、好ましくは１〜２重量部である。（Ｅ）成分が１重
量部未満では加水分解の抑制効果が不十分となり、一
方、３重量部を越えると成形性や機械的強度等が低下す
る傾向がある。The pet resin composition of the present invention may further contain a hydrolysis inhibitor (E), whereby the pet is hydrolyzed to have a low molecular weight, whereby the melt viscosity is lowered, It is possible to prevent the impact resistance from decreasing. Examples of such a hydrolysis inhibitor include "Carbodilite" (trade name) manufactured by Nisshinbo Co., Ltd. The blending amount of the component (E) is 1 to 3 parts by weight, preferably 1 to 2 parts by weight, based on 100 parts by weight of the total of the components (A) and (B). If the amount of component (E) is less than 1 part by weight, the effect of suppressing hydrolysis will be insufficient, while if it exceeds 3 parts by weight, moldability and mechanical strength will tend to be reduced.
【００２０】本発明のペット樹脂組成物には、通常、添
加剤として用いられる顔料や染料等の着色剤、充填剤の
他、更に、紫外線吸収剤、滑剤、可塑剤、核剤、帯電防
止剤、難燃剤、抗菌、強化充填剤等を１種又は２種以上
組み合わせて添加してもさしつかえない。In the pet resin composition of the present invention, in addition to coloring agents such as pigments and dyes, which are usually used as additives, and fillers, ultraviolet absorbers, lubricants, plasticizers, nucleating agents and antistatic agents are further added. The flame retardant, antibacterial agent, reinforcing filler, etc. may be added alone or in combination of two or more kinds.
【００２１】本発明のペット樹脂組成物は、押出成形機
により混練、加熱、溶融して大気中に押し出すことによ
り発泡成形体とされる。発泡倍率は表面性の良好な発泡
成形体を得るためには、通常、１．１〜２．５倍、好ま
しくは１．２〜２．０倍である。発泡倍率が１．１倍未
満では、発泡成形体の重量が大きくなって軽量化が不十
分となるばかりでなく、木質風合に富む発泡成形体が得
られ難い。一方、発泡倍率が２．５倍を越えると、表面
に肌荒れや破泡が現れ、表面性が低下するとともに、耐
衝撃性が低下する。The pet resin composition of the present invention is kneaded, heated and melted by an extruder to be extruded into the air to obtain a foamed molded product. The expansion ratio is usually 1.1 to 2.5 times, preferably 1.2 to 2.0 times in order to obtain a foamed molded product having a good surface property. When the expansion ratio is less than 1.1 times, not only is the weight of the foamed molded product increased and the weight reduction becomes insufficient, but it is difficult to obtain a foamed molded product rich in wood texture. On the other hand, when the expansion ratio exceeds 2.5 times, the surface becomes rough and foam is broken, and the surface property is lowered and the impact resistance is lowered.
【００２２】本発明のペット樹脂組成物は、手摺、取っ
手、段差スロープ、配線カバー、造作材、建材等に有用
なペット樹脂発泡成形体を提供することができる。The pet resin composition of the present invention can provide a foamed PET resin product useful for handrails, handles, step slopes, wiring covers, construction materials, building materials and the like.
【００２３】[0023]
【実施例】以下、本発明を実施例及び比較例に基づいて
更に詳細に説明するが、本発明はこれらにより何ら制限
されるものではない。EXAMPLES The present invention will be described in more detail based on the following examples and comparative examples, but the present invention is not limited thereto.
【００２４】実施例１〜１３、比較例１〜３
リサイクルペット樹脂を用いた、表１に示す配合のペッ
ト樹脂組成物を下記の押出条件により押出成形し、３５
mmの丸棒状の発泡成形体を得、該成形体について表面
性、耐衝撃性及び成形性を下記の基準により評価した。
結果を表１に示す。Examples 1 to 13 and Comparative Examples 1 to 3 A PET resin composition containing recycled pet resin and having the composition shown in Table 1 was extruded under the following extrusion conditions, and 35
A round rod-shaped foamed molded product having a size of mm was obtained, and the molded product was evaluated for surface property, impact resistance and moldability according to the following criteria.
The results are shown in Table 1.
【００２５】 （押出条件） 押出成形機：６５mm一軸押出機 押出温度（℃）：Ｃ１ ２２０〜２４０、 Ｃ２ ２４０〜２５０ Ｃ３ ２５０〜２７０、 Ｃ４ ２５０〜２７０ Ｄ ２５０〜２６０[0025] (Extrusion conditions) Extruder: 65mm single screw extruder Extrusion temperature (° C): C1 220 to 240, C2 240 to 250 C3 250-270, C4 250-270 D 250-260
【００２６】（物性の評価方法）
表面性：
○ 樹脂の発泡が有効に行われ、成形体の表面が滑らか
で肌荒れも認められない。
△ 成形体の表面に部分的に肌荒れ、破泡が認められ
る。
× 成形体の表面全体に肌荒れ、破泡が認められる。(Evaluation method of physical properties) Surface property: The resin is effectively foamed, the surface of the molded product is smooth and no rough skin is observed. △ The surface of the molded product is partially roughened and bubbles are observed. × The surface of the molded body is roughened and bubbles are observed.
【００２７】耐衝撃性：
○ 高さ２ｍの高さより落下させた際、割れの発生が認
められない。
△ 高さ２ｍの高さより落下させた際、一部割れの発生
が認められる。
× 高さ２ｍの高さより落下させた際、全体に割れの発
生が認められる。Impact resistance: o No cracking is observed when dropped from a height of 2 m. Δ Partial cracking is observed when dropped from a height of 2 m. C. When dropped from a height of 2 m, cracks are observed throughout.
【００２８】成形性：
○ ドローダウンがなく、成形性が良好である。
△ 多少のドローダウンがあり、成形性がやや不良であ
る。
× ドローダウン大きく、成形困難である。Moldability: Good moldability without drawdown. Δ There is some drawdown, and moldability is somewhat poor. × Large drawdown and difficult to mold.
【００２９】[0029]
【表１】 [Table 1]
【００３０】尚、表１中、各成分の商品名及びメーカー
名は下記のとおりである。
（Ｂ１）改質剤 ＡＲＰ−１１００ アロン化成
（Ｂ２）改質剤 メタブレンＳＨ−１６ 三菱レイヨン
（Ｃ）加工助剤 メタブレンＡ−３０００ 三菱レイヨン
（Ｄ１）発泡剤 ＨＫ−４０Ｂ（重炭酸ナトリウム）
ベーリンガー・インゲルハイム
（Ｄ２）発泡剤 ＨＢ−２０１（アゾ化合物） 永和化成
（Ｅ）加水分解抑制剤 カルボジライト 日清紡
着色剤 ＳＢ−ＨＰ−１２９９Ａ レジノカラー
造核剤 ＰＫＰ−５３ 富士タルクIn Table 1, the trade name and manufacturer name of each component are as follows. (B1) Modifier ARP-1100 Aron Chemical (B2) Modifier METABLEN SH-16 Mitsubishi Rayon (C) Processing Aid METABLEN A-3000 Mitsubishi Rayon (D1) Foaming Agent HK-40B (sodium bicarbonate) Boehringer Ingelheim (D2) Foaming agent HB-201 (azo compound) Eiwa Kasei (E) Hydrolysis inhibitor Carbodilite Nisshinbo Coloring agent SB-HP-1299A Resinocolor Nucleating agent PKP-53 Fuji Talc
【００３１】表１の結果から明かなように、本発明のペ
ット樹脂組成物によれば、溶融粘度が向上するとともに
ドローダウンが防止され、成形性が良好であり、また表
面性及び耐衝撃性に優れた発泡成形体を得ることができ
る。特に、発泡倍率が２．０倍以下の発泡成形体は表面
性及び耐衝撃性に優れ、軽量性及び木質風合いに富み、
内外装材等の各種建材として好適である。As is clear from the results shown in Table 1, according to the pet resin composition of the present invention, the melt viscosity is improved, drawdown is prevented, the moldability is good, and the surface property and impact resistance are good. It is possible to obtain an excellent foamed molded article. In particular, a foamed molded product having a foaming ratio of 2.0 times or less has excellent surface properties and impact resistance, is light in weight and rich in wood texture,
It is suitable as various building materials such as interior and exterior materials.
【００３２】また、本発明によれば、特定の改質剤
（Ｂ）及び加工助剤（Ｃ）、更には、これらと特定の加
水分解抑制剤（Ｅ）との使用により、溶融粘度が向上
し、且つドローダウンが防止されるため、リサイクルペ
ット樹脂を用いても、成形性が良好で、表面性及び耐衝
撃性に優れた発泡成形体を得ることができ、資源の節
約、環境保全にも貢献するものである。Further, according to the present invention, the melt viscosity is improved by using the specific modifier (B) and the processing aid (C), and further by using them together with the specific hydrolysis inhibitor (E). In addition, since drawdown is prevented, even if recycled PET resin is used, it is possible to obtain a foamed molded product that has good moldability and excellent surface properties and impact resistance, and saves resources and protects the environment. Also contributes.
【００３３】[0033]
【発明の効果】以上のとおり、本発明のペット樹脂組成
物は、成形性が良好であり、表面性及び耐衝撃性に優れ
た発泡成形体を提供することができる。特に、発泡倍率
が２．０倍以下の発泡成形体は、表面性及び耐衝撃性に
優れ、軽量性及び木質風合いに富み、内外装材等の各種
建材として有用である。さらに、本発明のペット樹脂組
成物は、リサイクルペット樹脂を用いても、成形性が良
好で、表面性及び耐衝撃性に優れた発泡成形体を得るこ
とができるので、資源の節約、環境保全にも貢献するも
のである。INDUSTRIAL APPLICABILITY As described above, the PET resin composition of the present invention has good moldability and can provide a foamed molded article having excellent surface properties and impact resistance. In particular, a foamed molded product having a foaming ratio of 2.0 times or less has excellent surface properties and impact resistance, is light in weight and rich in wood texture, and is useful as various building materials such as interior and exterior materials. Furthermore, the PET resin composition of the present invention has good moldability even when a recycled PET resin is used, and it is possible to obtain a foamed molded article having excellent surface properties and impact resistance, thus saving resources and protecting the environment. It also contributes to.
─────────────────────────────────────────────────────
─────────────────────────────────────────────────── ───
【手続補正書】[Procedure amendment]
【提出日】平成１４年１月８日（２００２．１．８）[Submission date] January 8, 2002 (2002.1.8)
【手続補正１】[Procedure Amendment 1]
【補正対象書類名】明細書[Document name to be amended] Statement
【補正対象項目名】０００４[Correction target item name] 0004
【補正方法】変更[Correction method] Change
【補正内容】[Correction content]
【０００４】[0004]
【発明が解決しようとする課題】ペット樹脂を押出成形
する場合、ペット樹脂の特性によりドローダウンが大き
く、溶融体での形状保持及びサイジングダイでの賦形が
困難である。またペット樹脂は溶融粘度、溶融張力が低
いため、発泡剤の分解ガス圧にセルが耐え切れず破泡し
てしまい、表面が平滑で正常なスキン層を有する独立気
泡の発泡体が得られない、という問題を含んでいる。更
に、ペット樹脂は分子内にエステル結合を有するため、
成形時にエステル結合が加水分解され、機械的強度、特
に耐衝撃性が低下するという問題もあり、これがリサイ
クルペット樹脂の再利用を妨げる原因の一つとなってい
る。When a PET resin is extrusion-molded, a drawdown is large due to the characteristics of the PET resin, and it is difficult to maintain the shape in the melt and shape it in the sizing die. In addition, since the PET resin has a low melt viscosity and melt tension, the cells cannot withstand the decomposition gas pressure of the foaming agent and the cells are broken, and a foam with closed cells having a smooth surface and a normal skin layer cannot be obtained. , Is included. Furthermore, since PET resin has an ester bond in the molecule,
There is also a problem that the ester bond is hydrolyzed at the time of molding, and the mechanical strength, particularly the impact resistance is lowered, which is one of the causes that hinder the reuse of recycled PET resin.
───────────────────────────────────────────────────── フロントページの続き (51)Int.Cl.7 識別記号 ＦＩ テーマコート゛(参考） Ｂ２９Ｋ 105:04 Ｂ２９Ｋ 105:04 105:26 105:26 Ｃ０８Ｌ 67:02 ＺＡＢ Ｃ０８Ｌ 67:02 ＺＡＢ Ｆターム(参考） 4F074 AA32 AA39 AA66 AG20 BA03 BA04 BA13 BA14 BA16 BA18 CA22 CC04Y CC22X CC26Z DA02 DA34 4F207 AA13 AA17 AA24 AA45 AA50 AB02 AC01 AG20 KA01 KA11 KF04 ─────────────────────────────────────────────────── ─── Continuation of front page (51) Int.Cl. 7 Identification code FI theme code (reference) B29K 105: 04 B29K 105: 04 105: 26 105: 26 C08L 67:02 ZAB C08L 67:02 ZAB F term ( Reference) 4F074 AA32 AA39 AA66 AG20 BA03 BA04 BA13 BA14 BA16 BA18 CA22 CC04Y CC22X CC26Z DA02 DA34 4F207 AA13 AA17 AA24 AA45 AA50 AB02 AC01 AG20 KA01 KA11 KF04
Claims (7)
（Ａ）、スチレン系エラストマー改質剤及び／又はアク
リル系改質剤（Ｂ）、アクリル系ＰＴＦＥ加工助剤
（Ｃ）及び発泡剤（Ｄ）からなることを特徴とするポリ
エチレンテレフタレート系樹脂組成物。1. A polyethylene terephthalate resin (A), a styrene elastomer modifier and / or an acrylic modifier (B), an acrylic PTFE processing aid (C) and a foaming agent (D). A characteristic polyethylene terephthalate resin composition.
なる請求項１記載のポリエチレンテレフタレート系樹脂
組成物。2. The polyethylene terephthalate resin composition according to claim 1, which further comprises a hydrolysis inhibitor (E).
（Ｂ）成分が５〜４０重量部、（Ｃ）成分及び（Ｄ）成
分が、（Ａ）成分と（Ｂ）成分との合計１００重量部に
対し、それぞれ１〜１０重量部及び０．１〜５重量部で
ある請求項１記載のポリエチレンテレフタレート系樹脂
組成物。3. The component (A) is contained in an amount of 60 to 100 parts by weight,
The component (B) is 5 to 40 parts by weight, and the components (C) and (D) are 1 to 10 parts by weight and 0.1, respectively, based on 100 parts by weight of the total of the components (A) and (B). The polyethylene terephthalate resin composition according to claim 1, which is -5 parts by weight.
との合計１００重量部に対し、１〜３重量部である請求
項２記載のポリエチレンテレフタレート系樹脂組成物。4. The polyethylene terephthalate resin composition according to claim 2, wherein the component (E) is 1 to 3 parts by weight based on 100 parts by weight of the total of the components (A) and (B).
（Ａ）が、リサイクルポリエチレンテレフタレート系樹
脂である請求項１〜４のいずれか１項に記載のポリエチ
レンテレフタレート系樹脂組成物。5. The polyethylene terephthalate resin composition according to any one of claims 1 to 4, wherein the polyethylene terephthalate resin (A) is a recycled polyethylene terephthalate resin.
リエチレンテレフタレート系樹脂組成物を押出成形機に
より混練、加熱、溶融して大気中に押し出すことを特徴
とするポリエチレンテレフタレート系樹脂組成物の発泡
成形方法。6. A polyethylene terephthalate resin composition comprising the polyethylene terephthalate resin composition according to any one of claims 1 to 4 which is kneaded, heated, melted and extruded into the air by an extruder. Foam molding method for products.
のポリエチレンテレフタレート系樹脂組成物の発泡成形
方法。7. The method for foam-molding a polyethylene terephthalate resin composition according to claim 6, wherein the expansion ratio is 2 or less.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP2001399628A JP2003192816A (en) | 2001-12-28 | 2001-12-28 | Polyethylene terephthalate-based resin composition and foam molding method for the same |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP2001399628A JP2003192816A (en) | 2001-12-28 | 2001-12-28 | Polyethylene terephthalate-based resin composition and foam molding method for the same |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JP2003192816A true JP2003192816A (en) | 2003-07-09 |
Family
ID=27604573
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP2001399628A Pending JP2003192816A (en) | 2001-12-28 | 2001-12-28 | Polyethylene terephthalate-based resin composition and foam molding method for the same |
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| Country | Link |
|---|---|
| JP (1) | JP2003192816A (en) |
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2011080051A (en) * | 2009-09-14 | 2011-04-21 | Sekisui Chem Co Ltd | Ethylene-vinyl acetate-based resin composition |
| JP2012067204A (en) * | 2010-09-24 | 2012-04-05 | Sekisui Chem Co Ltd | Vinyl resin composition molding and flame-retardant sheet |
| JP2014019750A (en) * | 2012-07-13 | 2014-02-03 | Matsumoto Yushi Seiyaku Co Ltd | Polyester resin composition and use thereof |
| KR20160096240A (en) * | 2015-02-04 | 2016-08-16 | 이호영 | Extruded plastics |
-
2001
- 2001-12-28 JP JP2001399628A patent/JP2003192816A/en active Pending
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2011080051A (en) * | 2009-09-14 | 2011-04-21 | Sekisui Chem Co Ltd | Ethylene-vinyl acetate-based resin composition |
| JP2012067204A (en) * | 2010-09-24 | 2012-04-05 | Sekisui Chem Co Ltd | Vinyl resin composition molding and flame-retardant sheet |
| JP2014019750A (en) * | 2012-07-13 | 2014-02-03 | Matsumoto Yushi Seiyaku Co Ltd | Polyester resin composition and use thereof |
| KR20160096240A (en) * | 2015-02-04 | 2016-08-16 | 이호영 | Extruded plastics |
| KR101674503B1 (en) * | 2015-02-04 | 2016-11-10 | 이호영 | Extruded plastics |
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