JP3037998B2 - Polyethylene terephthalate resin sheet and molded product - Google Patents
Polyethylene terephthalate resin sheet and molded productInfo
- Publication number
- JP3037998B2 JP3037998B2 JP2307117A JP30711790A JP3037998B2 JP 3037998 B2 JP3037998 B2 JP 3037998B2 JP 2307117 A JP2307117 A JP 2307117A JP 30711790 A JP30711790 A JP 30711790A JP 3037998 B2 JP3037998 B2 JP 3037998B2
- Authority
- JP
- Japan
- Prior art keywords
- talc
- sheet
- molded product
- polyethylene terephthalate
- core layer
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Expired - Fee Related
Links
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- Laminated Bodies (AREA)
- Blow-Moulding Or Thermoforming Of Plastics Or The Like (AREA)
- Compositions Of Macromolecular Compounds (AREA)
Description
【発明の詳細な説明】 （産業上の利用分野） 本発明は、主に食品や玩具あるいは電気部品の包装容
器、ブリスターパック等に用いられる、透明性、スリッ
プ性及びスタッキング性に優れたポリエチレンテレフタ
レート樹脂組成物、シート及び成形品に関する。The present invention relates to a polyethylene terephthalate having excellent transparency, slip property and stacking property which is mainly used for packaging containers for foods, toys or electric parts, blister packs and the like. The present invention relates to a resin composition, a sheet, and a molded product.
（従来の技術） ポリエチレンテレフタレート樹脂シート（以下ポリエ
ステルシートという）を成形した容器は、特に透明性、
機械的性能及び食品衛生性に優れ食品や玩具あるいは電
気部品の包装容器、ブリスターパック等にポリスチレン
樹脂製や塩化ビニル樹脂製の成形品と共に使用されてい
る。(Prior art) A container formed from a polyethylene terephthalate resin sheet (hereinafter referred to as a polyester sheet) is particularly transparent,
It is excellent in mechanical performance and food hygiene, and is used in packaging containers for foods, toys or electric parts, blister packs and the like, together with molded products made of polystyrene resin or vinyl chloride resin.
然るにポリエステルシートの表面は、平滑で透明性に
優れているが、その半面滑り性が悪く、シートを押出成
形する際には、ロールへの巻きずれが発生し易く、特に
0.5mm以下の薄物においては良好なロールシートが得ら
れ難い。However, the surface of the polyester sheet is smooth and excellent in transparency, but its half-side slippage is poor, and when extruding the sheet, it is easy to cause winding deviation to a roll, especially
With a thin material of 0.5 mm or less, it is difficult to obtain a good roll sheet.
さらにこのシートを熱成形して得られた成形品は、積
み重ねした際に成形品が一枚ずつ剥がれ難いというスタ
ッキング性の問題がある。Furthermore, molded articles obtained by thermoforming this sheet have a problem of stacking properties, in which the molded articles are difficult to peel off one by one when stacked.
従来からこれらの問題を解決する手段としては、有機
系の滑剤・可塑性を内部に練り込む方法やシリコンオイ
ル等潤滑剤をシートあるいは成形品の表面に塗布する方
法が知られている。Conventionally, as a means for solving these problems, a method of kneading an organic lubricant or plasticity into the inside or a method of applying a lubricant such as silicone oil to the surface of a sheet or a molded product is known.
（発明が解決しようとする課題） しかしながら、前者の方法では成形加熱時にポリエス
テル樹脂の結晶化を促進することにより、得られた成形
品の透明性を著しく低下させたり、加工途中で滑剤・可
塑剤が蒸発揮散して成形品でのスタッキング性の効果が
低下し有効ではない。(Problems to be Solved by the Invention) However, in the former method, the crystallization of the polyester resin is promoted at the time of molding heating, so that the transparency of the obtained molded article is remarkably reduced, and the lubricant and the plasticizer are processed during the processing. Is not effective because the effect of stacking on molded products is reduced due to evaporation.
また、後者の方法は成形加工後の処理のため安定した
スリップ性、スタッキング性が得られるが、表面の濡れ
指数を下げ印刷適性やシート適性が劣る欠点があり用途
が限定されている。In the latter method, stable slip properties and stacking properties can be obtained due to the treatment after molding, but there are drawbacks in that the wettability index of the surface is lowered and the suitability for printing and the sheet are inferior.
本発明は、このような問題を解決するものであり、ポ
リエチレンテレフタレート樹脂に特定されたタルクを添
加することにより、この樹脂組成物を用いて作製したシ
ートは、透明性と機械的強度にすぐれ、しかもシート表
面のスリップ性が良好となり、シート原反の巻きずれも
なく、さらに成形後に積み重ねられた成形品は、スタッ
キング性と印刷適性に問題が生じないことを見い出し、
本発明を完成するに至った。The present invention solves such a problem, and by adding talc specified to the polyethylene terephthalate resin, a sheet produced using this resin composition has excellent transparency and mechanical strength, In addition, the slip property of the sheet surface is improved, there is no slippage of the sheet material, and it is found that the molded articles stacked after molding do not cause problems in stacking properties and printability.
The present invention has been completed.
（課題を解決するための手段） すなわち本発明はポリエチレンテレフタレート樹脂と
平均粒子径が10μｍ以下のタルクを0.01〜１重量％含有
してなることを特徴とするポリエチレンテレフタレート
樹脂組成物、該樹脂組成物を用いたシート及びその成形
品である。(Means for Solving the Problems) That is, the present invention provides a polyethylene terephthalate resin composition comprising a polyethylene terephthalate resin and 0.01 to 1% by weight of talc having an average particle diameter of 10 μm or less, and the resin composition. And a molded product thereof.
本発明に用いられるポリエチレンテレフタレート樹脂
（以下PET樹脂という）はエチレングリコール、テレフ
タル酸の重縮合によって得られるが、この他、グリコー
ル成分としては、ジエチレングリコール、1,4−テトラ
メチレングリコール、1,4−シクロヘキサンジメタノー
ル、ヘプタメチレングリコールを、ジカルボン酸成分と
しては、イソフタル酸、1,5−ナフタレンジカルボン
酸、アジピン酸等をモノマーとして成分の全量又は一部
を置き換えて使用することもできる。The polyethylene terephthalate resin (hereinafter referred to as PET resin) used in the present invention is obtained by polycondensation of ethylene glycol and terephthalic acid, and other glycol components include diethylene glycol, 1,4-tetramethylene glycol, and 1,4- Cyclohexane dimethanol and heptamethylene glycol can be used as dicarboxylic acid components, with isophthalic acid, 1,5-naphthalenedicarboxylic acid, adipic acid and the like as monomers, with all or some of the components replaced.
次に、本発明に用いられるタルクは、マグネシウムの
含水ケイ酸塩鉱物であるMg3Si4O10(OH)2を主成分とし
て、この他、Al2O3,FeO,Mn3O4，Na2O，K2O等不純物とし
て含むこともできるものであり、さらに表面処理剤が施
されているものでも差し支えない。タルクの一次粒子の
平均粒子径は、10μｍ以下であることが好ましく、平均
粒子径が10μｍを越えるものでは、タルクを含有したPE
T樹脂組成物から得られるシート及び成形品の透明性が
低下し好ましくない。Next, talc used in the present invention contains Mg 3 Si 4 O 10 (OH) 2 , which is a hydrated silicate mineral of magnesium, as a main component, and also Al 2 O 3 , FeO, Mn 3 O 4 , It can be contained as impurities such as Na 2 O and K 2 O, and may be one to which a surface treatment agent has been applied. The average particle diameter of the primary particles of talc is preferably 10 μm or less, if the average particle diameter exceeds 10 μm, PE containing talc
The transparency of sheets and molded articles obtained from the T resin composition is undesirably reduced.
また、全タルクは全組成物中に0.01重量％〜１重量
％、好ましくは0.1重量％〜0.5重量％含有するものであ
り、全組成物中への含有量が0.01重量％未満では、成形
時のシートのスリップ性が不足しシートロールの巻きず
れを生じ、さらにシートを熱成形して得られた成形品の
スタッキング性が低下する。In addition, the total talc is contained in the entire composition in an amount of 0.01% by weight to 1% by weight, preferably 0.1% by weight to 0.5% by weight. In addition, the slip property of the sheet is insufficient, the winding of the sheet roll is shifted, and the stacking property of a molded product obtained by thermoforming the sheet is reduced.
また、１重量％を越えるとPET樹脂との均一な分散性
が低下して、得られたシートの透明性が低下し、甚だし
くはブツとして存在し外観上問題があり、さらにシート
を熱成形して得られた成形品に偏肉を生じる原因とな
る。On the other hand, if it exceeds 1% by weight, the uniform dispersibility with the PET resin is reduced, and the transparency of the obtained sheet is lowered. This causes uneven thickness in the molded product obtained by the above method.
このように、PET樹脂組成物へのタルクの含有量は、
タルクを適当量配合することにより、透明性を損なわず
にスリップ性及びスタッキング性に優れたPETシート及
びその成形品が得られるが、樹脂組成物へのタルクの含
有量が増加すると透明性の低下をきたす。Thus, the content of talc in the PET resin composition,
By blending an appropriate amount of talc, a PET sheet excellent in slip property and stacking property and a molded product thereof can be obtained without impairing transparency, but the transparency decreases when the content of talc in the resin composition increases. Cause.
シートのスリップ性及び成形品のスタッキング性は、
シート及び成形品それぞれの表面部分の性能が関与して
おり、そこでタルク添加の効果をあげるには、シートの
タルク高含有部分をコア層に比較してスキン層とした多
層構造とすることが望ましい。The slip property of the sheet and the stacking property of the molded product
The performance of the surface portion of each of the sheet and the molded product is involved, and in order to improve the effect of talc addition, it is desirable to have a multilayer structure in which the talc-rich portion of the sheet is a skin layer compared to the core layer .
特に、本発明のシートが、コア層に含有するタルク濃
度がスキン層に含有するタルク濃度の50％以下である多
層構造にあっては、スキン層：コア層の肉厚比率が1:1
〜９の範囲からなるシートが好ましく、シートのスキン
層とコア層との溶融粘度差に起因するスキン層が受ける
剪断力は、タルクの結晶配列に影響を与え、シートを単
層構成にてタルクを均一に配合したものに比較して、シ
ートのスリップ性及び成形品のスタッキング性が向上す
る。In particular, when the sheet of the present invention has a multilayer structure in which the talc concentration contained in the core layer is 50% or less of the talc concentration contained in the skin layer, the thickness ratio of the skin layer to the core layer is 1: 1.
The shear force applied to the skin layer due to the difference in melt viscosity between the skin layer and the core layer of the sheet affects the crystal arrangement of talc, and the sheet is formed into a single layer talc. As compared with the case where the compound is uniformly blended, the slip property of the sheet and the stacking property of the molded product are improved.
本発明で得られた多層シートにあっては、タルク含有
スキン層は、コア層の両表面に均等厚みであることが好
ましいが、コア層の片面であっても差し支えない。In the multilayer sheet obtained by the present invention, the talc-containing skin layer preferably has a uniform thickness on both surfaces of the core layer, but may have only one surface of the core layer.
ここで、シート中のコア層に含有するタルク濃度がス
キン層に含有するタルク濃度の50％を越える場合及びス
キン層：コア層の肉厚比率でスキン層の肉厚が1:1を越
えると、シートがより単層に近つくことになるので透明
性の効果は減少し、スキン層：コア層の肉厚比率でスキ
ン層の肉厚が1:9より未満では、スキン層表面にコア層
のタルクが露出を生じ、シート表面の曇り度が増加する
と共に、シートに傷を発生させる。Here, when the talc concentration contained in the core layer in the sheet exceeds 50% of the talc concentration contained in the skin layer, and when the thickness of the skin layer exceeds 1: 1 in the thickness ratio of the skin layer: the core layer. If the thickness of the skin layer is less than 1: 9 at the skin layer: core layer thickness ratio, the effect of the transparency is reduced because the sheet becomes closer to a single layer, and the skin layer has a core layer on the surface. Of talc causes exposure, increasing the haze on the sheet surface and causing scratches on the sheet.
本発明の樹脂組成物は、必要に応じて着色剤、酸化防
止剤、熱安定剤及びタルク以外の充填剤等を添加するこ
ともできる。The resin composition of the present invention may contain a coloring agent, an antioxidant, a heat stabilizer, a filler other than talc, and the like, if necessary.
本発明のPET樹脂とタルクとの混合方法としては、シ
ート成形時に押出機に直接投入する方法、PET樹脂とタ
ルクとを固体状態に混合した後に押出機にて溶融混練し
てペレット化し、シート押出し時に使用する方法、又は
PET樹脂にタルクを高充填したマスターバッチペレット
を作製しておき、シート作製時にPET樹脂で希釈して使
用する方法のいずれであっても差し支えない。As a method of mixing the PET resin and talc of the present invention, a method of directly charging the extruder at the time of sheet forming, mixing the PET resin and talc in a solid state, melt kneading with an extruder, pelletizing, and extruding the sheet. Sometimes used methods, or
Any method may be used in which a master batch pellet in which PET resin is highly filled with talc is prepared, and the sheet is diluted with the PET resin during sheet production.
（実施例） 以下実施例により本発明をさらに詳細に説明する。(Examples) Hereinafter, the present invention will be described in more detail with reference to Examples.
尚、シート及び成形品の物性測定は、次のように測定
した。The physical properties of the sheet and the molded article were measured as follows.
（１） 透明性、表面曇り度 各実施例、比較例のシート及び成形品から測定用のサ
ンプルを切り出し、JIS K−6718に準拠して測定した。(1) Transparency, surface haze A sample for measurement was cut out from the sheets and molded products of the examples and comparative examples, and measured in accordance with JIS K-6718.
（２） 静摩擦係数 各実施例、比較例のシートから測定用のサンプルを切
り出し、JIS K−7125に準拠して測定した。(2) Static friction coefficient A sample for measurement was cut out from the sheets of the examples and comparative examples, and measured in accordance with JIS K-7125.
（３） スタッキング性 各実施例、比較例のシートを用いて真空成形機で深さ
20mm,縦60mm,横120mmの成形品を作製した。この各成形
品５個の積み重ねた上に、1kgの荷重を１分間かけた後
の各成形品の引き剥がし易さを下記に基準で測定した。(3) Stacking properties Depth with a vacuum forming machine using the sheets of the examples and comparative examples
A molded product of 20 mm, 60 mm in length and 120 mm in width was produced. After the five molded products were stacked, a 1 kg load was applied for 1 minute, and then the ease of peeling of each molded product was measured based on the following criteria.
○：成形品１個ずつが自重で剥がれる。：: Each molded product is peeled off by its own weight.
△：成形品１個ずつが手で容易に剥がれる。Δ: Each molded product was easily peeled off by hand.
×：成形品１個ずつが手で剥がれ難い。X: It is difficult to peel off each molded product by hand.
実施例１〜４、比較例１〜３ 結晶化装置付脱湿乾燥機にて予め水分量を50ppm以下
としたPET樹脂（イーストマンコダック社製、商品名PET
9902）と平均粒子径５μｍのタルクとを表−１に示す
割合にて混合した。Examples 1 to 4 and Comparative Examples 1 to 3 A PET resin (trade name PET manufactured by Eastman Kodak Co., Ltd.) having a water content of 50 ppm or less in advance by a dehumidifying dryer with a crystallization device.
9902) and talc having an average particle diameter of 5 μm were mixed at the ratio shown in Table 1.
それぞれの樹脂組成物を40mm押出機にて押出温度260
〜280℃の範囲で溶融し、Ｔダイで0.4mm厚の透明シート
を作製し、さらに該シートを真空成形機で成形品を作製
した後、それぞれの物性を測定した。測定結果を表−１
に示す。Each resin composition was extruded with a 40 mm extruder at an extrusion temperature of 260.
After melting at a temperature in the range of 280 ° C., a transparent sheet having a thickness of 0.4 mm was prepared with a T-die, and the sheet was formed into a molded product by a vacuum forming machine. Table 1 shows the measurement results.
Shown in
PET樹脂単味及びタルク含有量が0.005重量％では、ス
リップ性及びスタッキング性が劣り、タルク含有量が1.
5重量％では透明性が低下する。When the PET resin alone and the talc content are 0.005% by weight, the slip property and the stacking property are inferior, and the talc content is 1.
At 5% by weight, the transparency is reduced.
実施例５〜７、比較例４〜５ 結晶化装置付脱湿乾燥機にて予め水分量を50ppm以下
としたPET樹脂（イーストマンコダック社製、商品名PET
9921W）に表−２に示す各平均粒子径のタルクをタルク
含有量が0.3重量％となるように混合した。Examples 5 to 7, Comparative Examples 4 to 5 PET resin (made by Eastman Kodak Co., Ltd., trade name: PET) having a water content of 50 ppm or less in advance by a dehumidifying dryer equipped with a crystallization device.
9921W) and talc having the average particle diameters shown in Table 2 were mixed so that the talc content was 0.3% by weight.
それぞれの樹脂組成物を、実施例１と同様な方法にて
シート及び成形品を作製した後、物性を測定した。測定
結果を表−２に示す。After preparing a sheet and a molded product from each resin composition in the same manner as in Example 1, physical properties were measured. Table 2 shows the measurement results.
PET樹脂単味ではスタッキング性が劣り、タルクの平
均粒子径が15μｍを越えると透明性が低下する。Plain PET resin has poor stacking properties, and if the average particle diameter of talc exceeds 15 μm, transparency decreases.
実施例８〜10、比較例６〜９ 結晶化装置付脱湿乾燥機にて予め水分量を50ppm以下
としたPET樹脂（イーストマンコダック社製、商品名PET
9921W）に平均粒子径５μｍのタルクをタルク含有量が
0.5重量％となるように混合した樹脂組成物をスキン層
とし、同様に結晶化装置付脱湿乾燥機にて予め水分量を
50ppm以下としたPET樹脂（イーストマンコダック社製、
商品名PET 9921W）をコア層として、40mm押出機２台と
２種３層のフィードブロックを使用して表−３に示すス
キン層：コア層の比率の0.4mm厚の２種３層シートを作
製し、ついで実施例１と同様に製品を作製した後、物性
を測定した。測定結果を表−３に示す。Examples 8 to 10, Comparative Examples 6 to 9 PET resin whose moisture content was previously reduced to 50 ppm or less by a dehumidifying dryer equipped with a crystallizer (made by Eastman Kodak Company, trade name: PET)
9921W) with talc having an average particle size of 5 μm
The resin composition mixed to be 0.5% by weight was used as a skin layer.
PET resin (manufactured by Eastman Kodak Co., Ltd.
Using two 40 mm extruders and two types of three-layer feed blocks using a core layer of trade name PET 9921W), a 0.4 mm thick two-type three-layer sheet having a skin layer: core layer ratio shown in Table 3 was used. After the product was manufactured and then a product was manufactured in the same manner as in Example 1, physical properties were measured. Table 3 shows the measurement results.
タルク含有単層系に比較してスキン層：コア層の肉厚
比率を1:1〜９とした３層構造とすることにより透明性
及びスタッキング性がさらに優れる。Compared to a talc-containing single layer system, the three-layer structure in which the thickness ratio of the skin layer to the core layer is 1: 1 to 9 further enhances transparency and stacking properties.
実施例11〜13、比較例10 結晶化装置付脱湿乾燥機にて予め水分量を50ppm以下
としたPET樹脂（イーストマンコダック社製、商品名PET
9921W）に平均粒子径５μｍのタルクをタルク含有量が
0.5重量％となるように混合した樹脂組成物をスキン層
とし、同様に結晶化装置付脱湿乾燥機にて予め水分量を
50ppm以下としたPET樹脂（イーストマンコダック社製、
商品名PET 9921W）に平均粒子径５μｍのタルクを表−
４に示す各タルク含有量となるように混合した樹脂組成
物をコア層として、40mm押出機２台と２種３層のフィー
ドブロックを使用してスキン層：コア層の肉厚比率が1:
2の0.4mm厚の２種３層シートを作製し、ついで実施例１
と同様に製品を作製した後、物性を測定した。測定結果
を表−４に示す。Examples 11 to 13 and Comparative Example 10 PET resin having a water content of 50 ppm or less in advance using a dehumidifying dryer equipped with a crystallizer (made by Eastman Kodak Company, trade name: PET)
9921W) with talc having an average particle size of 5 μm
The resin composition mixed to be 0.5% by weight was used as a skin layer.
PET resin (manufactured by Eastman Kodak Co., Ltd.
Talc with an average particle size of 5 μm is listed in the product name PET 9921W).
As a core layer, a resin composition mixed so as to have the respective talc contents shown in FIG. 4 was used as a core layer, and two 40 mm extruders and two types and three layers of feed blocks were used so that the skin layer: core layer thickness ratio was 1:
2. A two-layer, three-layer sheet having a thickness of 0.4 mm was prepared.
After producing a product in the same manner as in the above, physical properties were measured. Table 4 shows the measurement results.
コア層のタルク含有量をスキン層のタルク含有量の50
％以下とした多層構成系は透明性及びスタッキング性共
に良好であり、50％を越える多層構成系は共にやや低下
し単層系により近くなる。Reduce the talc content of the core layer by 50% of the talc content of the skin layer.
% Or less, the transparency and the stacking property are both good, and the multilayer composition exceeding 50% is slightly lower and closer to a single-layer system.
（発明の効果） 以上のとおり本発明は、PET樹脂を主体にシート及び
成形品を作製する際に、特定されたタルクを含有させる
ことにより、PET樹脂本来の透明性を損なうことなく、
良好なスリップ性とスタッキング性を得る効果を有する
ものである。 (Effects of the Invention) As described above, the present invention includes a specified talc when producing a sheet and a molded product mainly using a PET resin without impairing the original transparency of the PET resin.
It has the effect of obtaining good slip properties and stacking properties.
───────────────────────────────────────────────────── フロントページの続き (56)参考文献 特開 昭63−183935（ＪＰ，Ａ) 特開 昭60−127349（ＪＰ，Ａ) 特開 昭60−71659（ＪＰ，Ａ) 特開 昭59−206456（ＪＰ，Ａ) 特開 平４−153038（ＪＰ，Ａ) 特開 平４−65239（ＪＰ，Ａ) (58)調査した分野(Int.Cl.7，ＤＢ名) C08L 67/00 - 67/08 B32B 27/36 C08K 3/00 - 13/08 ──────────────────────────────────────────────────続 き Continuation of the front page (56) References JP-A-63-183935 (JP, A) JP-A-60-127349 (JP, A) JP-A-60-71659 (JP, A) 206456 (JP, A) JP-A-4-153038 (JP, A) JP-A-4-65239 (JP, A) (58) Fields investigated (Int. Cl. 7 , DB name) C08L 67/00-67 / 08 B32B 27/36 C08K 3/00-13/08
Claims (3)
粒子径が10μｍ以下のタルクを0.2〜１重量％含有して
なるポリエチレンテレフタレート樹脂組成物をスキン層
とし、ポリエチレンテレフタレート樹脂をコア層とし
て、該スキン層：コア層の肉厚比率が1:1〜９であり、
透明性が87％以上なることを特徴とする多層シート。1. A skin layer comprising a polyethylene terephthalate resin composition and a polyethylene terephthalate resin composition containing 0.2 to 1% by weight of talc having an average particle diameter of 10 μm or less, and a polyethylene terephthalate resin as a core layer. The thickness ratio of the core layer is 1: 1 to 9,
A multilayer sheet having a transparency of 87% or more.
度の50％以下であることを特徴とする請求項１に記載の
多層シート。2. The multilayer sheet according to claim 1, wherein the talc concentration of the core layer is 50% or less of the talc concentration of the skin layer.
形してなる成形品。3. A molded article obtained by thermoforming the multilayer sheet according to claim 1.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP2307117A JP3037998B2 (en) | 1990-11-15 | 1990-11-15 | Polyethylene terephthalate resin sheet and molded product |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP2307117A JP3037998B2 (en) | 1990-11-15 | 1990-11-15 | Polyethylene terephthalate resin sheet and molded product |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPH04180957A JPH04180957A (en) | 1992-06-29 |
| JP3037998B2 true JP3037998B2 (en) | 2000-05-08 |
Family
ID=17965235
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP2307117A Expired - Fee Related JP3037998B2 (en) | 1990-11-15 | 1990-11-15 | Polyethylene terephthalate resin sheet and molded product |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JP3037998B2 (en) |
Families Citing this family (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US6500890B2 (en) | 2000-12-15 | 2002-12-31 | Wellman, Inc. | Polyester bottle resins having reduced frictional properties and methods for making the same |
| US7759449B2 (en) | 2000-12-15 | 2010-07-20 | Wellman, Inc. | Methods for introducing additives into polyethylene terephthalate |
| US7655291B2 (en) * | 2003-10-14 | 2010-02-02 | Toray Plastics (America), Inc. | Smooth co-extruded polyester film including talc and method for preparing same |
| FR2944024B1 (en) * | 2009-04-01 | 2012-06-08 | Cgl Pack Service | THERMOFORMABLE MATERIAL IN SHEET. |
-
1990
- 1990-11-15 JP JP2307117A patent/JP3037998B2/en not_active Expired - Fee Related
Also Published As
| Publication number | Publication date |
|---|---|
| JPH04180957A (en) | 1992-06-29 |
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