JP2002037909A - Polyester-based resin expanded sheet and method for producing the same - Google Patents
Polyester-based resin expanded sheet and method for producing the sameInfo
- Publication number
- JP2002037909A JP2002037909A JP2000231349A JP2000231349A JP2002037909A JP 2002037909 A JP2002037909 A JP 2002037909A JP 2000231349 A JP2000231349 A JP 2000231349A JP 2000231349 A JP2000231349 A JP 2000231349A JP 2002037909 A JP2002037909 A JP 2002037909A
- Authority
- JP
- Japan
- Prior art keywords
- polyester resin
- based resin
- polyester
- main component
- thermoplastic polyester
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Pending
Links
Abstract
Description
【０００１】[0001]
【発明の属する技術分野】本発明は、ポリエステル系樹
脂発泡シート及びその製造方法に関する。The present invention relates to a polyester resin foam sheet and a method for producing the same.
【０００２】[0002]
【従来の技術】従来より、雑貨用あるいは店舗の装飾・
表示用の低発泡樹脂シートとして、発泡倍率が３倍以下
のポリ塩化ビニル樹脂発泡シートやポリスチレン樹脂発
泡シートが多用されており、また、ポリエチレンテレフ
タレート樹脂発泡シートなども上市されている。2. Description of the Related Art Conventionally, for decoration of goods or stores
As a low-foaming resin sheet for display, a foamed polyvinyl chloride resin sheet or a foamed polystyrene resin sheet having an expansion ratio of 3 times or less is widely used, and a foamed polyethylene terephthalate resin sheet is also on the market.
【０００３】[0003]
【発明が解決しようとする課題】しかしながら、ポリ塩
化ビニル樹脂発泡シートは、火災時に有害な塩化水素ガ
スを含んだ煙を多量に発生するため、人体に悪影響を与
え、非難行動や消火活動を妨げるという問題があり、ポ
リスチレン樹脂発泡シートは脆弱で割れやすいという問
題があった。However, the foamed sheet of polyvinyl chloride resin generates a large amount of smoke containing harmful hydrogen chloride gas at the time of fire, which has an adverse effect on the human body and hinders fire fighting and fire fighting. There is a problem that the polystyrene resin foam sheet is fragile and easily broken.
【０００４】また、ポリエチレンテレフタレート樹脂発
泡シートは、ポリエチレンテレフタレート樹脂が結晶性
であるため、後加工（例えば印刷、塗装、接着、打抜
き、加熱曲げ、真空成形など）が難しいという問題があ
った。Further, the polyethylene terephthalate resin foam sheet has a problem that post-processing (for example, printing, painting, bonding, punching, heat bending, vacuum forming, etc.) is difficult because the polyethylene terephthalate resin is crystalline.
【０００５】本発明は上記の問題に鑑みなされたもの
で、その目的とするところは、良好な後加工性と衝撃強
度を備えた粘り強いポリエステル系樹脂発泡シートと、
その製造方法を提供することにある。The present invention has been made in view of the above problems, and has as its object to provide a tough polyester resin foam sheet having good post-processability and impact strength.
It is to provide a manufacturing method thereof.
【０００６】[0006]
【課題を解決するための手段】上記の目的を達成するた
め、本発明の請求項１に係るポリエステル系樹脂発泡シ
ートは、非結晶性又は結晶化度の低い熱可塑性ポリエス
テル系樹脂を主成分とし、その一部が架橋された分子構
造をもつ、低発泡倍率の独立気泡を備えた発泡シートで
あることを特徴とする。In order to achieve the above object, a foamed polyester resin sheet according to claim 1 of the present invention comprises a non-crystalline or low-crystalline thermoplastic polyester resin as a main component. , Characterized in that it is a foamed sheet provided with closed cells having a low foaming ratio and a partially crosslinked molecular structure.
【０００７】この発泡シートは、主成分の熱可塑性ポリ
エステル系樹脂が非結晶性又は結晶化度の低い樹脂であ
り、しかも、その一部のポリエステル系樹脂を架橋させ
ることで、発泡成形時の熱可塑性ポリエステル系樹脂の
加水分解による粘度や物性の低下を防止しているため、
粘り強く衝撃強度や後加工性が良好である。また、通常
のポリエステル系樹脂はリサイクルにより加水分解して
物性低下を招くが、本発明の発泡シートは、上記のよう
に架橋させることで加水分解による物性低下を防止でき
るため、リサイクル性にも優れている。結晶性又は結晶
化度の高いポリエステル系樹脂は、架橋させても粘り強
い後加工性の良好な発泡体を得ることができないので不
適当である。In this foamed sheet, the thermoplastic polyester-based resin as the main component is an amorphous resin or a resin having a low degree of crystallinity. To prevent the reduction of viscosity and physical properties due to hydrolysis of the plastic polyester resin,
It is tenacious and has good impact strength and post-processability. In addition, ordinary polyester-based resins are hydrolyzed by recycling to cause deterioration in physical properties, but the foamed sheet of the present invention is excellent in recyclability because cross-linking as described above can prevent deterioration in physical properties due to hydrolysis. ing. Polyester-based resins having high crystallinity or crystallinity are not suitable because a cross-linked foam having good tough post-processability cannot be obtained.
【０００８】主成分の熱可塑性ポリエステル系樹脂とし
ては、請求項２に記載したような共重合体、即ち、ポリ
エチレンテレフタレートのエチレングリコールの１０〜
５０モル％をシクロヘキサンジメタノールで置き換えた
共重合体が好適であり、このような主成分樹脂は請求項
３に記載したようにシートの８０重量％を占めることが
好ましい。また、このポリエステル系樹脂を架橋させる
架橋剤としては、請求項４に記載したようなエポキシ変
性樹脂が好適である。[0008] The thermoplastic polyester resin as the main component is a copolymer as described in claim 2, ie, 10 to 10 of ethylene glycol of polyethylene terephthalate.
A copolymer in which 50 mol% is replaced by cyclohexanedimethanol is preferred, and such a main component resin preferably occupies 80% by weight of the sheet. Further, as a crosslinking agent for crosslinking the polyester-based resin, an epoxy-modified resin as described in claim 4 is preferable.
【０００９】次に、本発明の請求項５に係るポリエステ
ル系樹脂発泡シートの製造方法は、非結晶性又は結晶化
速度の遅い熱可塑性ポリエステル系樹脂に発泡剤と架橋
剤を配合し、発泡及び架橋させながら押出成形すること
を特徴とする。Next, a method for producing a polyester resin foam sheet according to claim 5 of the present invention is to mix a foaming agent and a crosslinking agent with a non-crystalline or thermoplastic polyester resin having a low crystallization rate to form a foamed sheet. It is characterized by extrusion molding while crosslinking.
【００１０】この製造方法では、非結晶性又は結晶化速
度の遅い熱可塑性ポリエステル系樹脂を使用することに
よって、得られる発泡シートの樹脂の結晶化度を零又は
低く抑えると共に、架橋剤で熱可塑性ポリエステル系樹
脂の一部を架橋することによって、押出発泡成形時のポ
リエステル系樹脂の加水分解による粘度や物性の低下を
防止しているため、発泡剤の熱分解で均一微細な独立気
泡が形成され、耐衝撃性や後加工性の良好な粘り強いポ
リエステル系樹脂発泡シートを得ることができる。ま
た、架橋により、通常必要な樹脂の乾燥が不要になると
いう省エネルギー性も実現できる。In this production method, by using a non-crystalline or low-crystallization thermoplastic polyester resin, the degree of crystallinity of the resin of the foamed sheet to be obtained is suppressed to zero or low, and a thermoplastic resin is used with a crosslinking agent. By cross-linking a part of the polyester-based resin, the viscosity and physical properties of the polyester-based resin are prevented from deteriorating due to hydrolysis during extrusion foaming. Thus, a tough polyester resin foam sheet having good impact resistance and good post-processing properties can be obtained. In addition, the cross-linking can also realize energy saving that drying of a resin which is normally required is not required.
【００１１】次に、本発明の請求項６に係る製造方法
は、上記請求項５の製造方法において、発泡及び架橋さ
せながら押出した発泡体をポリシングロールで押圧して
シート化することを特徴とする。Next, a manufacturing method according to a sixth aspect of the present invention is characterized in that, in the manufacturing method according to the fifth aspect, a foam extruded while foaming and crosslinking is pressed by a polishing roll into a sheet. I do.
【００１２】このようにポリシングロールで押圧する
と、発泡シートの厚み規制や発泡倍率の調整を行うこと
ができ、表面肌の美しいポリエステル系樹脂発泡シート
を得ることができる。By pressing with a polishing roll in this way, it is possible to regulate the thickness of the foam sheet and adjust the expansion ratio, and it is possible to obtain a polyester resin foam sheet having a beautiful surface.
【００１３】[0013]
【発明の実施の形態】以下、本発明の具体的な実施形態
を詳述する。DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS Hereinafter, specific embodiments of the present invention will be described in detail.
【００１４】本発明のポリエステル系樹脂発泡シート
は、均一微細な独立気泡を有する厚さ１〜１５ｍｍ程度
のシート状ないし板状の発泡シートであり、そのままで
又は後加工を施して、店舗の装飾シートや表示シート、
或は、雑貨用の原料シートとして使用されるものであ
る。The polyester resin foam sheet of the present invention is a sheet or plate-like foam sheet having a thickness of about 1 to 15 mm and having uniform and fine closed cells. Sheets and display sheets,
Alternatively, it is used as a material sheet for miscellaneous goods.
【００１５】この発泡シートの主成分となる樹脂は、非
結晶性又は結晶化度の低い熱可塑性ポリエステル系樹脂
であり、具体的には、ポリエチレンテレフタレートのエ
チレングリコールの１０〜５０モル％をシクロヘキサン
ジメタノールで置き換えた共重合体が好適に使用され
る。この共重合体は、テレフタル酸とエチレングリコー
ルとシクロヘキサンジメタノールの組合わせからなる共
重合体であって、エチレンテレフタレートとシクロヘキ
サンジメチレンテレフタレートがランダムもしくはブロ
ック状に連結した構造の共重合体であり、上記のように
エチレングリコールの１０〜５０モル％がシクロヘキサ
ンジメタノールで置き換えられたもの、即ち、シクロヘ
キサンジメチレンテレフタレートが１０〜５０モル％を
占める共重合体は、非結晶性ないし低結晶化度の樹脂で
あるため、粘り強く割れ難い発泡シートを得ることが可
能となる。The resin which is the main component of the foamed sheet is a non-crystalline or low-crystalline thermoplastic polyester resin. Specifically, 10 to 50 mol% of ethylene glycol of polyethylene terephthalate is cyclohexanediethylene glycol. A copolymer replaced with methanol is preferably used. This copolymer is a copolymer composed of a combination of terephthalic acid, ethylene glycol and cyclohexane dimethanol, and is a copolymer having a structure in which ethylene terephthalate and cyclohexane dimethylene terephthalate are connected in a random or block manner, As described above, a copolymer in which 10 to 50 mol% of ethylene glycol is replaced by cyclohexane dimethanol, that is, a copolymer in which cyclohexane dimethylene terephthalate accounts for 10 to 50 mol%, has a non-crystalline or low crystallinity. Because it is a resin, it is possible to obtain a foamed sheet that is tenacious and difficult to break.
【００１６】特に、ポリエチレンテレフタレートのエチ
レングリコールの３０モル％前後がシクロヘキサンジメ
タノールで置き換えられた共重合体、つまり、シクロヘ
キサンジメチレンテレフタレートが３０モル％前後を占
めエチレンテレフタレートが７０モル％前後を占める共
重合体は、ポリエステル樹脂の中で唯一の完全な非結晶
性の樹脂であるため、極めて好適に使用される。In particular, a copolymer in which about 30 mol% of ethylene glycol in polyethylene terephthalate is replaced by cyclohexane dimethanol, that is, cyclohexane dimethylene terephthalate accounts for about 30 mol% and ethylene terephthalate accounts for about 70 mol%. Polymers are very preferably used because they are the only completely non-crystalline resins among polyester resins.
【００１７】ポリエチレンテレフタレートのエチレング
リコールの５０モル％以上がシクロヘキサンジメタノー
ルで置き換えられた共重合体や、エチレングリコールの
１０モル％未満がシクロヘキサンジメタノールで置き換
えられた共重合体は、結晶化度の増大によって耐衝撃性
が低下し、粘り強い発泡シートを得ることが困難となる
ので好ましくない。A copolymer in which 50% by mole or more of ethylene glycol in polyethylene terephthalate is replaced by cyclohexane dimethanol or a copolymer in which less than 10% by mole of ethylene glycol is replaced by cyclohexane dimethanol have a low crystallinity. The impact resistance is reduced by the increase, and it becomes difficult to obtain a tenacious foam sheet, which is not preferable.
【００１８】上記の非結晶性ないし結晶化度の低い共重
合体は、未架橋であれば、発泡成形時に加水分解される
ため物性の低下を招くことになるが、本発明では、主成
分の上記共重合体の一部を架橋剤で架橋しているため、
発泡成形時に加水分解による物性や粘性の低下が防止さ
れ、粘り強く衝撃強度や後加工性（例えば印刷、塗装、
接着、打抜き、加熱曲げ、真空成形等）の良好な発泡シ
ートが得られるのである。If the above-mentioned non-crystalline or low-crystallinity copolymer is not cross-linked, it is hydrolyzed at the time of foam molding, which results in a decrease in physical properties. Because part of the copolymer is cross-linked with a cross-linking agent,
A reduction in physical properties and viscosity due to hydrolysis during foam molding is prevented, and the impact strength and post-processability (for example, printing, painting,
Thus, a foamed sheet having good adhesion, punching, heating bending, vacuum forming, etc.) can be obtained.
【００１９】架橋剤としては、エポキシ化スチレン・ブ
タジエン・スチレンブロック共重合体、エポキシ化ブタ
ジエンゴムなどのエポキシ変性樹脂が好適に使用され
る。この架橋剤の配合量は、主成分の熱可塑性ポリエス
テル系樹脂１００重量部に対して０．５〜２０重量部程
度とすることが好ましく、０．５重量部未満では充分な
物性改善効果が得られず、一方、２０重量部より多く配
合すると、密な架橋により発泡シートが硬く脆くなると
いった不都合を生じる。As the crosslinking agent, epoxy-modified resins such as epoxidized styrene / butadiene / styrene block copolymer and epoxidized butadiene rubber are preferably used. The amount of the crosslinking agent is preferably about 0.5 to 20 parts by weight based on 100 parts by weight of the thermoplastic polyester resin as the main component. When the amount is less than 0.5 part by weight, a sufficient effect of improving physical properties is obtained. On the other hand, if the amount is more than 20 parts by weight, there is a disadvantage that the foamed sheet becomes hard and brittle due to dense crosslinking.
【００２０】主成分の樹脂として使用される前記非結晶
性の共重合体には、ポリエチレンテレフタレートその他
のポリエステル樹脂を混合してもよいが、その場合には
主成分の共重合体が発泡シートの８０重量％以上を占め
るように、他のポリエステル樹脂を少量混合することが
望ましい。他のポリエステル樹脂の混合量が多過ぎて主
成分の共重合体の占める率が８０％未満になると、発泡
シートの粘り強さや衝撃強度が低下するといった不都合
を生じる。The non-crystalline copolymer used as the main component resin may be mixed with polyethylene terephthalate or another polyester resin. In this case, the main component copolymer is used as the foamed sheet. It is desirable to mix a small amount of another polyester resin so as to account for 80% by weight or more. If the mixing ratio of the main component copolymer is less than 80% due to too large a mixing amount of the other polyester resin, inconvenience such as a decrease in the tenacity and impact strength of the foamed sheet occurs.
【００２１】この発泡シートの発泡倍率は、前述した用
途に適合するように１．１〜３．０倍程度と低く抑えら
れる。尚、発泡倍率の調整は、後述する発泡剤の添加量
やシートの厚み規制によって行われる。The expansion ratio of this foamed sheet is suppressed to as low as about 1.1 to 3.0 times so as to conform to the above-mentioned applications. The expansion ratio is adjusted by adjusting the amount of a foaming agent to be described later and the thickness of the sheet.
【００２２】以上のようなポリエステル系樹脂発泡シー
トは、非結晶性又は結晶化速度の遅い前記の熱可塑性ポ
リエステル系樹脂（共重合体）に発泡剤と前記の架橋剤
を配合して押出機の内部で加熱、溶融、混練し、発泡及
び架橋させながら押出機先端の金型より押出成形するこ
とによって効率良く製造される。押出機としては、１本
又は２本のスクリューを内蔵した単軸又は二軸押出機が
使用される。The above-mentioned foamed polyester resin sheet is prepared by blending a foaming agent and the above-mentioned crosslinking agent with the above-mentioned thermoplastic polyester resin (copolymer) which is non-crystalline or has a low crystallization rate. It is manufactured efficiently by extruding from the mold at the tip of the extruder while heating, melting, kneading, foaming and crosslinking inside. As the extruder, a single or twin screw extruder incorporating one or two screws is used.
【００２３】発泡剤としては、押出成形時の押出機の内
部温度以下の温度で熱分解してガスを発生する化学発泡
剤、例えば、アゾジカルボンアミド、重炭酸ナトリウ
ム、バリウムアゾジカルボキシレート等が好適に使用さ
れる。発泡剤の添加量は、発泡シートの発泡倍率を考慮
して、樹脂分１００重量部に対し０．２〜５重量部の範
囲内で適宜調整することが好ましい。発泡剤の添加量が
０．２重量部より少ないと、十分な発泡効果が得られ
ず、５重量部より多いと、発泡時に発生する水分やアン
モニアガス等が多すぎて架橋剤の効果がなくなるため、
物性的に弱い発泡シートが得られたり、独立気泡（セ
ル）の形成が不可能になったりする。Examples of the foaming agent include a chemical foaming agent which generates a gas by being thermally decomposed at a temperature not higher than the internal temperature of the extruder at the time of extrusion molding, for example, azodicarbonamide, sodium bicarbonate, barium azodicarboxylate and the like. It is preferably used. It is preferable that the addition amount of the foaming agent is appropriately adjusted in the range of 0.2 to 5 parts by weight with respect to 100 parts by weight of the resin component in consideration of the expansion ratio of the foamed sheet. If the amount of the foaming agent is less than 0.2 parts by weight, a sufficient foaming effect cannot be obtained. If the amount is more than 5 parts by weight, moisture and ammonia gas generated at the time of foaming are too large, and the effect of the crosslinking agent is lost. For,
A foam sheet having weak physical properties may be obtained, or formation of closed cells (cells) may not be possible.
【００２４】このような発泡剤を前記の架橋剤と共に前
記の熱可塑性ポリエステル系樹脂に配合し、押出機の内
部で該樹脂の融点以上の温度に加熱して溶融させながら
均一に混練すると、該樹脂の一部が架橋剤によって架橋
されると共に、発泡剤が押出機の内部で熱分解してガス
を発生し、溶融樹脂を押出機先端の金型から押出したと
きに急激な減圧により発泡して発泡シートが形成され
る。そのとき、架橋によって熱可塑性ポリエステル系樹
脂の加水分解による粘度や物性の低下が防止されるた
め、発泡時に気泡壁の破壊を生じることがなく、均一で
微細な独立気泡を有する発泡シートが形成される。しか
も、主成分の熱可塑性ポリエステル系樹脂は非結晶性で
あるか、又は、結晶化速度が遅く押出し後の冷却中に速
やかに結晶化しないものであるため、粘り強くて衝撃強
度や後加工性の良好なポリエステル系樹脂発泡シートが
形成される。When such a foaming agent is blended with the above-mentioned thermoplastic polyester resin together with the above-mentioned crosslinking agent, and is heated to a temperature not lower than the melting point of the resin inside the extruder and uniformly kneaded while being melted. A part of the resin is cross-linked by the cross-linking agent, and the blowing agent thermally decomposes inside the extruder to generate gas, and when the molten resin is extruded from the die at the tip of the extruder, it is foamed due to rapid pressure reduction. Thus, a foam sheet is formed. At that time, since the cross-linking prevents a decrease in viscosity or physical properties due to hydrolysis of the thermoplastic polyester-based resin, a foam sheet having uniform and fine closed cells is formed without destruction of cell walls at the time of foaming. You. Moreover, the thermoplastic polyester-based resin as the main component is non-crystalline or has a low crystallization rate and does not crystallize quickly during cooling after extrusion, so it is tenacious and has an impact strength and post-processability. A good polyester resin foam sheet is formed.
【００２５】上記の製造方法においては、押出し直後の
発泡体をポリシングロールで押圧してシート化すること
が望ましく、このようにポリシングロールでシート化す
ると、発泡シートを所定の厚みに規制でき、それによっ
て発泡倍率を調整することもでき、また、発泡シートの
表面肌をきれいに仕上げることもできる。In the above-mentioned manufacturing method, it is desirable that the foam immediately after extrusion is pressed by a polishing roll to form a sheet. By forming the sheet with the polishing roll in this way, the foam sheet can be regulated to a predetermined thickness. Thus, the expansion ratio can be adjusted, and the surface skin of the foam sheet can be finely finished.
【００２６】次に、本発明の更に具体的な実施例と比較
例を説明する。Next, more specific examples and comparative examples of the present invention will be described.
【００２７】［実施例１］ポリエチレンテレフタレート
のエチレングリコールの一部をシクロヘキサンジメタノ
ールで置き換えた非晶質である共重合体（イーストマン
ケミカル社製のＰＥＴＧ１４４７１）１００重量部に対
し、架橋剤としてエポキシ化スチレン・ブタジエン・ス
チレンブロック共重合体を２重量部、発泡剤としてアゾ
ジカルボンアミドを０．６重量部配合し、これを二軸押
出機に投入した。そして、押出機内部で２１０℃に加
熱、溶融させて均一に混練した後、押出機先端の金型よ
り発泡させながら押出し、これをポリシングロールで押
圧してシート化することにより、厚さ３ｍｍ、発泡倍率
１．８倍の完全非結晶性のポリエステル系樹脂発泡シー
トを製造した。Example 1 100 parts by weight of an amorphous copolymer (PETG14471 manufactured by Eastman Chemical Co.) in which part of ethylene glycol in polyethylene terephthalate was replaced with cyclohexanedimethanol, and epoxy as a crosslinking agent 2 parts by weight of styrene / butadiene / styrene block copolymer and 0.6 parts by weight of azodicarbonamide as a foaming agent were blended and charged into a twin-screw extruder. Then, after being heated and melted at 210 ° C. inside the extruder and uniformly kneaded, the mixture is extruded while being foamed from a die at the tip of the extruder, and is pressed into a sheet by a polishing roll to have a thickness of 3 mm. A completely non-crystalline polyester resin foam sheet having an expansion ratio of 1.8 was produced.
【００２８】この発泡シートについて、ＪＩＳ Ｋ ６
７４５のシャルピー衝撃強さの試験方法により衝撃強度
を測定したところ、５ｋＪ／ｍ2 であった。This foamed sheet is made according to JIS K6
When the impact strength was measured by a Charpy impact strength test method of 745, it was 5 kJ / m 2 .
【００２９】また、この発泡シートの後加工性の良否を
調べるために、ジクロロメタンで接着試験を行ったとこ
ろ、結晶化することなく密着し充分な接着強度を発現し
た。更に、印刷適性を調べたところ、塩化ビニル樹脂発
泡シートと同程度の良好な適性を有していた。Further, in order to examine the quality of the post-processability of the foamed sheet, an adhesion test was conducted with dichloromethane. As a result, the foamed sheet adhered without crystallization and exhibited a sufficient adhesion strength. Further, when the printing suitability was examined, it was found to be as good as the vinyl chloride resin foam sheet.
【００３０】［比較例１］厚さ３ｍｍ、発泡倍率２倍の
ポリスチレン発泡シート（ａ）と、厚さ３ｍｍ、発泡倍
率２倍のポリエチレンテレフタレート発泡シート（ｂ）
を準備し、それぞれの発泡シートについて実施例１と同
様に衝撃強度と後加工性の良否を調べた。Comparative Example 1 A polystyrene foam sheet (a) having a thickness of 3 mm and an expansion ratio of 2 times, and a polyethylene terephthalate foam sheet (b) having a thickness of 3 mm and an expansion ratio of 2 times
Was prepared, and the impact strength and post-processability of each foam sheet were examined in the same manner as in Example 1.
【００３１】その結果、シャルピー衝撃強さは、ポリス
チレン発泡シート（ａ）が１．０ｋＪ／ｍ2 、ポリエチ
レンテレフタレート発泡シート（ｂ）が３．１ｋＪ／ｍ
2 と低かった。また、溶剤接着試験の結果、ポリスチレ
ン発泡シート（ａ）は実用的な接着強度を発現したが、
ポリエチレンテレフタレート発泡シート（ｂ）は溶剤で
結晶化するため簡単に剥離し、実用的な接着強度を発現
しなかった。As a result, the Charpy impact strength of the polystyrene foam sheet (a) was 1.0 kJ / m 2 , and that of the polyethylene terephthalate foam sheet (b) was 3.1 kJ / m.
It was 2 and low. As a result of the solvent adhesion test, the polystyrene foam sheet (a) exhibited practical adhesive strength.
The polyethylene terephthalate foam sheet (b) was easily separated because of crystallization with a solvent, and did not exhibit practical adhesive strength.
【００３２】以上の実施例１および比較例１の結果か
ら、比較例１のポリスチレン発泡シート（ａ）は衝撃強
度が著しく劣り、また、比較例１の結晶性のポリエチレ
ンテレフタレート発泡シート（ｂ）は後加工性（接着
性）が劣っているのに対し、本発明の非結晶性のポリエ
ステル系樹脂発泡シートは、衝撃強度も後加工性（接着
性、印刷適性）も良好であることが分かる。From the results of Example 1 and Comparative Example 1 described above, the polystyrene foam sheet (a) of Comparative Example 1 has significantly poor impact strength, and the crystalline polyethylene terephthalate foam sheet (b) of Comparative Example 1 has While the post-processability (adhesion) is inferior, the non-crystalline polyester resin foam sheet of the present invention has good impact strength and post-processability (adhesion, printability).
【００３３】[0033]
【発明の効果】以上の説明から明らかなように、本発明
のポリエステル系樹脂発泡シートは、後加工性が良好
で、衝撃強度が大きく粘り強い発泡シートであり、本発
明の製造方法によって効率良く量産することができる。As is apparent from the above description, the polyester resin foam sheet of the present invention is a foam sheet having good post-processability, high impact strength and tenacity, and can be efficiently mass-produced by the production method of the present invention. can do.
───────────────────────────────────────────────────── フロントページの続き (72)発明者 野田 恒文 大阪市中央区安土町２丁目３番13号 タキ ロン株式会社内 (72)発明者 岡本 恵吉 大阪市中央区安土町２丁目３番13号 タキ ロン株式会社内 Ｆターム(参考） 4F074 AA66A AA66N AB02 BA03 BA13 BA15 BB03 CA22 CC22X DA02 DA12 DA45 ──────────────────────────────────────────────────続 き Continuing on the front page (72) Inventor Tsunefumi Noda 2-3-13 Azuchicho, Chuo-ku, Osaka City Inside Takiron Co., Ltd. (72) Keikichi Okamoto 2-3-13 Azuchicho, Chuo-ku, Osaka City No. Takiron Co., Ltd. F-term (reference) 4F074 AA66A AA66N AB02 BA03 BA13 BA15 BB03 CA22 CC22X DA02 DA12 DA45
Claims (6)
エステル系樹脂を主成分とし、その一部が架橋された分
子構造をもつ、低発泡倍率の独立気泡を備えたポリエス
テル系樹脂発泡シート。1. A polyester resin foam sheet comprising a non-crystalline or low-crystallinity thermoplastic polyester resin as a main component and a closed-cell with a low expansion ratio, having a partially crosslinked molecular structure. .
ポリエチレンテレフタレートのエチレングリコールの１
０〜５０モル％をシクロヘキサンジメタノールで置き換
えた共重合体である請求項１に記載のポリエステル系樹
脂発泡シート。2. A thermoplastic polyester resin as a main component,
Polyethylene terephthalate ethylene glycol 1
The polyester resin foam sheet according to claim 1, which is a copolymer in which 0 to 50 mol% is replaced with cyclohexanedimethanol.
める割合が８０重量％以上である請求項１又は請求項２
に記載のポリエステル系樹脂発泡シート。3. The method according to claim 1, wherein the proportion of the thermoplastic polyester resin as a main component is 80% by weight or more.
Polyester resin foam sheet according to 1.
部が、エポキシ変性樹脂からなる架橋剤によって架橋さ
れている請求項１ないし請求項３のいずれかに記載のポ
リエステル系樹脂発泡シート。4. The polyester resin foam sheet according to claim 1, wherein a part of the thermoplastic polyester resin as a main component is cross-linked by a cross-linking agent comprising an epoxy-modified resin.
リエステル系樹脂に発泡剤と架橋剤を配合し、発泡及び
架橋させながら押出成形することを特徴とするポリエス
テル系樹脂発泡体の製造方法。5. A process for producing a polyester resin foam, comprising mixing a foaming agent and a crosslinking agent with a thermoplastic polyester resin having a non-crystalline or low crystallization rate, and extruding the mixture while foaming and crosslinking. .
ポリシングロールで押圧してシート化することを特徴と
する請求項５に記載の製造方法。6. The method according to claim 5, wherein the extruded foam while foaming and crosslinking is pressed by a polishing roll to form a sheet.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP2000231349A JP2002037909A (en) | 2000-07-26 | 2000-07-26 | Polyester-based resin expanded sheet and method for producing the same |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP2000231349A JP2002037909A (en) | 2000-07-26 | 2000-07-26 | Polyester-based resin expanded sheet and method for producing the same |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JP2002037909A true JP2002037909A (en) | 2002-02-06 |
Family
ID=18724199
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP2000231349A Pending JP2002037909A (en) | 2000-07-26 | 2000-07-26 | Polyester-based resin expanded sheet and method for producing the same |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JP2002037909A (en) |
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| KR20130005240A (en) * | 2011-07-05 | 2013-01-15 | 닛토덴코 가부시키가이샤 | Polyester elastomer foam and foam material |
| WO2013179944A1 (en) * | 2012-05-28 | 2013-12-05 | 日東電工株式会社 | Resin foam and foam member |
| WO2013179947A1 (en) * | 2012-05-28 | 2013-12-05 | 日東電工株式会社 | Resin foam, foam member, foam member laminate, and electric or electronic devices |
| WO2013179946A1 (en) * | 2012-05-28 | 2013-12-05 | 日東電工株式会社 | Resin foam and foam member |
| WO2013179945A1 (en) * | 2012-05-28 | 2013-12-05 | 日東電工株式会社 | Resin foam and foam member |
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Cited By (12)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| KR20130005240A (en) * | 2011-07-05 | 2013-01-15 | 닛토덴코 가부시키가이샤 | Polyester elastomer foam and foam material |
| WO2013179944A1 (en) * | 2012-05-28 | 2013-12-05 | 日東電工株式会社 | Resin foam and foam member |
| WO2013179947A1 (en) * | 2012-05-28 | 2013-12-05 | 日東電工株式会社 | Resin foam, foam member, foam member laminate, and electric or electronic devices |
| WO2013179946A1 (en) * | 2012-05-28 | 2013-12-05 | 日東電工株式会社 | Resin foam and foam member |
| WO2013179945A1 (en) * | 2012-05-28 | 2013-12-05 | 日東電工株式会社 | Resin foam and foam member |
| JP2014005443A (en) * | 2012-05-28 | 2014-01-16 | Nitto Denko Corp | Resin foam and foam component |
| JP2014005445A (en) * | 2012-05-28 | 2014-01-16 | Nitto Denko Corp | Resin foam and foam component |
| JP2014005444A (en) * | 2012-05-28 | 2014-01-16 | Nitto Denko Corp | Resin foam and foam component |
| JP5509370B1 (en) * | 2012-05-28 | 2014-06-04 | 日東電工株式会社 | Resin foam, foam member, foam laminate, and electrical or electronic equipment |
| JP2014139287A (en) * | 2012-05-28 | 2014-07-31 | Nitto Denko Corp | Resin foam, foaming member, foaming member laminate, electric or electronic equipment |
| CN104350092A (en) * | 2012-05-28 | 2015-02-11 | 日东电工株式会社 | Resin foam and foam member |
| CN104470980B (en) * | 2012-05-28 | 2017-06-23 | 日东电工株式会社 | Foamed resin and bubble generation member |
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