JPH08252896A - Multilayer structure polyester sheet and packaging vessel made thereof - Google Patents
Multilayer structure polyester sheet and packaging vessel made thereofInfo
- Publication number
- JPH08252896A JPH08252896A JP7086297A JP8629795A JPH08252896A JP H08252896 A JPH08252896 A JP H08252896A JP 7086297 A JP7086297 A JP 7086297A JP 8629795 A JP8629795 A JP 8629795A JP H08252896 A JPH08252896 A JP H08252896A
- Authority
- JP
- Japan
- Prior art keywords
- sheet
- block copolymer
- polyester sheet
- resin
- skin 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.)
- Pending
Links
Landscapes
- Laminated Bodies (AREA)
- Compositions Of Macromolecular Compounds (AREA)
- Containers Having Bodies Formed In One Piece (AREA)
Abstract
Description
【０００１】[0001]
【産業上の利用分野】本発明は多層構造ポリエステルシ
ート及びそれからなる包装容器に関する。更に詳しくは
透明で、かつ耐衝撃性の経時的低下が少ない多層構造ポ
リエステルシート及びそれからなる包装容器に関する。BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a multilayer polyester sheet and a packaging container made of the same. More specifically, the present invention relates to a polyester sheet having a multilayer structure, which is transparent and whose impact resistance is less likely to decrease with time, and a packaging container made of the same.
【０００２】[0002]
【従来の技術】ポリエステル、特にポリエチレンテレフ
タレート（以下ＰＥＴと記す）は、機械的特性、耐熱
性、耐薬品性、寸法安定性等が優れているために繊維、
フィルム、プラスチックとして広く利用されている。最
近、ＰＥＴを原料とするシートを素材として作られた成
形物は容易に成形可能でかつ良好な透明性、光沢、ガス
透過性を有するため、種々の商品包装のための容器等と
して利用する試みがなされている。2. Description of the Related Art Polyester, especially polyethylene terephthalate (hereinafter referred to as PET), has excellent mechanical properties, heat resistance, chemical resistance, dimensional stability, etc.
Widely used as films and plastics. Recently, molded products made from PET sheets as raw materials can be easily molded and have good transparency, luster, and gas permeability, so attempts to use them as containers for packaging various products. Has been done.
【０００３】しかしながら、これらの包装容器は経時的
な物性の低下が起こり、この点を改善することが必要で
ある。前記のＰＥＴを原料とするシートから作られた包
装容器は、多湿度雰囲気中で長時間放置すると耐衝撃性
が著しく低下する。たとえば、輸出用家電品のブリスタ
ーケースなどは輸送時の船室内でしばしば認められる比
較的高い温度（５０℃）及び湿度（８０％ＲＨ）中に長
時間放置すると、耐衝撃性が低下して割れやすくなると
いう欠点を有しておりその改善が望まれていた。However, the physical properties of these packaging containers deteriorate with time, and it is necessary to improve this point. The impact resistance of the packaging container made of the above-mentioned sheet made of PET is remarkably deteriorated when left for a long time in a high humidity atmosphere. For example, a blister case for household appliances for export, if left for a long time in the relatively high temperature (50 ° C) and humidity (80% RH) that are often observed in the cabin during transportation, the impact resistance decreases and cracks occur. It has a drawback that it becomes easy, and its improvement has been desired.
【０００４】[0004]
【発明が解決しようとする課題】従って、本発明の目的
とするところは前記のＰＥＴを原料とするシートの欠点
をなくし、高温多湿度下で放置した場合の耐衝撃性の経
時的低下が少なく、かつ透明性、包装容器への二次加工
性に優れるシートを提供することにある。SUMMARY OF THE INVENTION Therefore, the object of the present invention is to eliminate the above-mentioned drawbacks of the sheet made of PET and to reduce the deterioration of impact resistance with time when the sheet is left under high temperature and high humidity. Another object of the present invention is to provide a sheet which is excellent in transparency and secondary processability into a packaging container.
【０００５】[0005]
【課題を解決するための手段】本発明者らはかかる目的
で鋭意研究を重ねた結果、ＰＥＴと特定のブロック共重
合体との樹脂組成物をスキン層とする多層構造シートに
おいて、スキン層に用いるＰＥＴとブロック共重合体と
の重量比率を規定することによって、耐衝撃性の経時的
低下が少なく、透明性、二次加工性および外観に優れた
多層構造シートがえられることを見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 studies conducted by the present inventors for such a purpose, in a multilayer structure sheet having a resin composition of PET and a specific block copolymer as a skin layer, It has been found that by defining the weight ratio of the PET to be used and the block copolymer, a multilayer structure sheet having less deterioration in impact resistance over time and excellent in transparency, secondary processability and appearance can be obtained. Has reached.
【０００６】すなわち、本発明は多層構造ポリエステル
シートにおいて該多層構造ポリエステルシートが、
（ａ）極限粘度が０．６〜１．０dl／ｇのＰＥＴ樹脂７
０〜９０重量部と、（ｂ）ポリ（１，４ブチレンテレフ
タレート）をハードセグメントとしポリテトラメチレン
グリコールをソフトセグメントとするブロック共重合体
１０〜３０重量部から得られる樹脂組成物からなるスキ
ン層と、極限粘度が０．６〜１．０dl／ｇのＰＥＴ樹脂
からなるコア層との多層構造ポリエステルシートであっ
て、スキン層とコア層の重量比率が１０：９０〜４０：
６０であることを特徴とする多層構造ポリエステルシー
ト、およびそれからなる包装容器に関するものである。That is, the present invention provides a multilayer polyester sheet, wherein the multilayer polyester sheet is
(A) PET resin 7 having an intrinsic viscosity of 0.6 to 1.0 dl / g
A skin layer composed of 0 to 90 parts by weight and 10 to 30 parts by weight of a block copolymer (b) having poly (1,4 butylene terephthalate) as a hard segment and polytetramethylene glycol as a soft segment. And a core layer made of PET resin having an intrinsic viscosity of 0.6 to 1.0 dl / g, wherein the weight ratio of the skin layer to the core layer is 10:90 to 40:
The present invention relates to a multi-layered polyester sheet having a number of 60 and a packaging container made of the same.
【０００７】本発明に用いられるＰＥＴ樹脂は、テレフ
タル酸またはそのエステル形成性誘導体（例えば低級ア
ルキルエステル等）と、エチレングリコールまたはその
エステル形成性誘導体（例えばモノカルボン酸エステル
エチレンオキサイド等）とを公知の方法によって重縮合
せしめて得られるものであるが、本来の物性を損なわな
い範囲の他の共重合成分を含んでいても良い。As the PET resin used in the present invention, terephthalic acid or its ester-forming derivative (eg lower alkyl ester) and ethylene glycol or its ester-forming derivative (eg monocarboxylic acid ester ethylene oxide) are known. Although it can be obtained by polycondensation by the above method, it may contain other copolymerization component within the range not impairing the original physical properties.
【０００８】このような共重合可能な成分としてはナフ
タレンジカルボン酸などの芳香族ジカルボン酸、アジピ
ン酸、セバシン酸などの脂肪族ジカルボン酸、ジエチレ
ングリコール、１，４−ブタンジオール、ネオペンチル
グリコール、１，４−シクロヘキサンジメタノールなど
のジオール、ポリエチレングリコール、ポリ（テトラメ
チレンオキシド）グリコールなどのポリアルキレングリ
コールなどが挙げられる。これらの共重合成分の配合量
は通常１０モル％以下、好ましくは５モル％以下であ
る。Examples of such copolymerizable components include aromatic dicarboxylic acids such as naphthalenedicarboxylic acid, aliphatic dicarboxylic acids such as adipic acid and sebacic acid, diethylene glycol, 1,4-butanediol, neopentyl glycol, 1, Examples thereof include diol such as 4-cyclohexanedimethanol, polyethylene glycol, polyalkylene glycol such as poly (tetramethylene oxide) glycol, and the like. The blending amount of these copolymerization components is usually 10 mol% or less, preferably 5 mol% or less.
【０００９】本発明に用いられるＰＥＴ樹脂の極限粘度
は０．６〜１．０dl／ｇ、好ましくは０．７〜０．９dl
／ｇである。極限粘度が０．６dl／ｇより低い場合はブ
ロック共重合体を配合しても、耐衝撃性の十分な向上が
見られない。また、極限粘度が１．０dl／ｇより高い場
合は、樹脂流動性が悪くなり、シート製膜が困難とな
る。The intrinsic viscosity of the PET resin used in the present invention is 0.6 to 1.0 dl / g, preferably 0.7 to 0.9 dl.
/ G. When the intrinsic viscosity is lower than 0.6 dl / g, the impact resistance is not sufficiently improved even if the block copolymer is blended. Further, when the intrinsic viscosity is higher than 1.0 dl / g, the resin fluidity becomes poor and it becomes difficult to form a sheet.
【００１０】本発明に用いられるブロック共重合体は、
ポリ（１，４ブチレンテレフタレート）をハードセグメ
ントとしポリテトラメチレングリコールをソフトセグメ
ントとするブロック共重合体であり、ポリ（１，４ブチ
レンテレフタレート）成分とポリテトラメチレングリコ
ール成分との重量比率は５０：５０〜８５：１５の範囲
にあることが好ましい。ポリ（１，４ブチレンテレフタ
レート）成分とポリテトラメチレングリコール成分の重
量比率が前記範囲外の場合、耐衝撃性の十分な向上が見
られない。The block copolymer used in the present invention is
A block copolymer having poly (1,4 butylene terephthalate) as a hard segment and polytetramethylene glycol as a soft segment, and the weight ratio of the poly (1,4 butylene terephthalate) component to the polytetramethylene glycol component is 50: It is preferably in the range of 50 to 85:15. When the weight ratio of the poly (1,4 butylene terephthalate) component and the polytetramethylene glycol component is out of the above range, the impact resistance is not sufficiently improved.
【００１１】本発明において、多層構造ポリエステルシ
ートのスキン層に用いられる樹脂組成物は、ＰＥＴ樹脂
７０〜９０重量部と、ポリ（１，４ブチレンテレフタレ
ート）をハードセグメントとしポリテトラメチレングリ
コールをソフトセグメントとするブロック共重合体１０
〜３０重量部からなる。ブロック共重合体が１０重量部
未満では、耐衝撃性の十分な向上がみられず、また３０
重量部を超えると多層構造シートの結晶化速度が速くな
り、シートの熱成形時に結晶化による白化が起こる。In the present invention, the resin composition used for the skin layer of the multilayer polyester sheet comprises 70 to 90 parts by weight of PET resin, poly (1,4 butylene terephthalate) as a hard segment and polytetramethylene glycol as a soft segment. Block copolymer 10
-30 parts by weight. If the amount of the block copolymer is less than 10 parts by weight, the impact resistance is not sufficiently improved,
When it exceeds the weight part, the crystallization speed of the multilayer structure sheet is increased, and whitening due to crystallization occurs during thermoforming of the sheet.
【００１２】樹脂組成物を得るための方法としては、任
意の方法を採用しえるがＰＥＴ樹脂とブロック共重合体
を二軸混練機等を用いてあらかじめ溶融下に混練しペレ
ット化するのが好ましい。As a method for obtaining the resin composition, any method can be adopted, but it is preferable to knead the PET resin and the block copolymer with a biaxial kneader or the like in advance under melting to pelletize. .
【００１３】本発明の多層構造ポリエステルシートとは
前記のＰＥＴ樹脂および樹脂組成物を通常の成膜手段に
よって得た実質的に未延伸状態のシートである。本発明
の多層構造ポリエステルシートの密度は、１．３４ｇ／
ｃｍ3 以下であり、実質的に非晶質のものである。シー
トの密度が１．３４ｇ／ｃｍ3 よりも大きいと、シート
の透明性が低下し、またシートの衝撃強度が低くなるた
め好ましくない。かかる非晶質の多層構造ポリエステル
シートは、本発明の組成物を押出機により溶融混合せし
めた後、一般の多層押出し用ダイから吐出せしめ冷却ド
ラムにより急冷することにより得られる。The multilayer polyester sheet of the present invention is a substantially unstretched sheet obtained by the above-mentioned PET resin and resin composition by a usual film forming means. The multilayer structure polyester sheet of the present invention has a density of 1.34 g /
cm 3 or less, which is substantially amorphous. When the density of the sheet is higher than 1.34 g / cm 3 , the transparency of the sheet is lowered and the impact strength of the sheet is lowered, which is not preferable. Such an amorphous multilayer polyester sheet is obtained by melt-mixing the composition of the present invention with an extruder and then discharging it from a general multilayer extrusion die and quenching it with a cooling drum.
【００１４】本発明の多層構造ポリエステルシートの構
成は、コア層の両側にスキン層がある三層シートであ
る。そして、スキン層とコア層の重量比率が１０：９０
〜４０：６０であることが好ましく、２０：８０〜３
０：７０であることがより好ましい。スキン層の重量比
率が１０重量％より小さい場合は、耐衝撃性の十分な向
上が見られず、また４０重量％より大きい場合は、ブロ
ック共重合体の重量構成率が高くなるためコスト高にな
る欠点がある。The multilayer polyester sheet of the present invention is a three-layer sheet having skin layers on both sides of a core layer. The weight ratio of the skin layer and the core layer is 10:90.
˜40: 60, preferably 20: 80-3
It is more preferably 0:70. When the weight ratio of the skin layer is less than 10% by weight, the impact resistance is not sufficiently improved, and when it is more than 40% by weight, the weight composition ratio of the block copolymer becomes high, resulting in high cost. There is a drawback.
【００１５】本発明の多層構造ポリエステルシートは前
述の通り、コア層の両側にスキン層がある三層シートで
あるが、両側のスキン層の割合が極端に相違すると製膜
時にシート表面の凹凸が著しくなるため好ましくなく、
両側のスキン層の重量比率は４０：６０〜５０：５０の
範囲とすることが好ましい。As described above, the multilayer polyester sheet of the present invention is a three-layer sheet having a skin layer on both sides of the core layer. However, if the ratio of the skin layers on both sides is extremely different, unevenness of the sheet surface may occur during film formation. It is not preferable because it becomes remarkable,
The weight ratio of the skin layers on both sides is preferably in the range of 40:60 to 50:50.
【００１６】本発明の包装容器は、本発明の多層構造ポ
リエステルシートを熱成形して得られる。熱成形は、シ
ートを加熱軟化せしめて所望の型に押し当て、型と材料
の間隙にある空気を除去し大気圧により型に密着せしめ
て成形する真空成形、あるいは大気圧以上の圧縮空気に
よりシートを型に密着せしめる圧空成形、および真空、
圧空を併用する成形などが適用できる。The packaging container of the present invention is obtained by thermoforming the multilayer polyester sheet of the present invention. Thermoforming is performed by heating and softening the sheet and pressing it against the desired mold, removing the air in the gap between the mold and the material and adhering it to the mold at atmospheric pressure, or forming the sheet with compressed air above atmospheric pressure. Pressure molding, which makes the mold adhere to the mold, and vacuum,
It is possible to apply molding that uses compressed air together.
【００１７】[0017]
【発明の効果】本発明の多層構造ポリエステルシートお
よびそれからなる包装容器は、優れた透明性を有し、高
温多湿度下でも耐衝撃性の経時的低下が少なく、各種包
装容器として広く使用できる。INDUSTRIAL APPLICABILITY The multilayer polyester sheet of the present invention and the packaging container made of the same have excellent transparency and little deterioration in impact resistance over time even under high temperature and high humidity, and can be widely used as various packaging containers.
【００１８】[0018]
【実施例】以下実施例により本発明を詳述する。なお、
主な物性値の測定条件は表１に示した。EXAMPLES The present invention will be described in detail below with reference to examples. In addition,
The measurement conditions for the main physical properties are shown in Table 1.
【００１９】[0019]
【表１】 [Table 1]
【００２０】実施例１〜４ 比較例１〜４ エチレングリコールとテレフタル酸からなる極限粘度が
０．７４dl／ｇのＰＥＴ樹脂とポリ（１，４ブチレンテ
レフタレート）をハードセグメントとしポリテトラメチ
レングリコールをソフトセグメントとするブロック共重
合体（共重合比率は、ポリテトラメチレングリコール成
分１７重量％）とをスクリュー径３０ｍｍの二軸混練機
を用いて溶融ブレンド（ブレンド比率は表２に記載）
し、ペレット状の樹脂組成物（Ａ）を得た。３つの１軸
押出し機を備えた幅８０ｃｍのＴダイを有する多層シー
ト押出し機を用い、原料として上記の樹脂組成物（Ａ）
をスキン層に、エチレングリコールとテレフタル酸から
なる極限粘度が０．７４dl／ｇのＰＥＴ樹脂をコア層に
表２に示した割合で使用して厚み０．３ｍｍの三層シー
トを押し出した。押出し機のシリンダー温度は２８０
℃、Ｔダイの温度は２９０℃、冷却ローラーの温度は３
０℃で行った。シートの極限粘度、密度、透明性（ヘー
ズ）の測定結果を表２に示す。得られたシートを、５０
℃、８０％ＲＨ雰囲気中に最大５０時間放置し、耐衝撃
性（５０％破壊エネルギー）の変化を測定した。結果を
表３に示す。このシートを単発真空熱成形機を用いて、
予熱温度３００℃で内径１０ｃｍ、深さ５５ｍｍの円柱
状の容器を成形し、賦形性良好な成形品を得るのに要し
たシートの予熱時間幅で成形性を評価した。評価基準
は、予熱時間幅が１０秒以上のものを（○）、１０秒以
下のものを（×）とした。結果を表３に併せて示す。得
られた成形品を５０℃、８０％ＲＨ雰囲気中に５０時間
放置した後、水を充填し、所定の高さから底部を下にし
て落下させた場合の成形品の割れを測定する落下衝撃テ
ストを実施した。評価基準は、５個の成形品のうち１つ
も割れなかった場合は（○）、１つでも割れた場合は
（×）とした。結果を表４に示す。Examples 1 to 4 Comparative Examples 1 to 4 PET resin consisting of ethylene glycol and terephthalic acid having an intrinsic viscosity of 0.74 dl / g and poly (1,4 butylene terephthalate) as a hard segment and polytetramethylene glycol as a soft segment. Melt blending with a block copolymer as a segment (copolymerization ratio is 17% by weight of polytetramethylene glycol component) using a biaxial kneader with a screw diameter of 30 mm (blending ratio is shown in Table 2).
Then, a pellet-shaped resin composition (A) was obtained. Using a multilayer sheet extruder having a T die with a width of 80 cm equipped with three uniaxial extruders, the above resin composition (A) was used as a raw material.
Was used as a skin layer, and a PET resin having an intrinsic viscosity of 0.74 dl / g composed of ethylene glycol and terephthalic acid was used as a core layer in a ratio shown in Table 2 to extrude a three-layer sheet having a thickness of 0.3 mm. Extruder cylinder temperature is 280
℃, T die temperature is 290 ℃, cooling roller temperature is 3
Performed at 0 ° C. Table 2 shows the measurement results of the intrinsic viscosity, density and transparency (haze) of the sheet. 50 sheets obtained
The sample was left in an atmosphere of 80 ° C and 80% RH for a maximum of 50 hours, and changes in impact resistance (50% breaking energy) were measured. The results are shown in Table 3. Using a single-shot vacuum thermoforming machine for this sheet,
A cylindrical container having an inner diameter of 10 cm and a depth of 55 mm was molded at a preheating temperature of 300 ° C., and the preheating time width of the sheet required to obtain a molded article having good shapeability was evaluated for moldability. As the evaluation criteria, the one having a preheating time width of 10 seconds or more was (◯) and the one having a preheating time width of 10 seconds or less was (x). The results are also shown in Table 3. The resulting molded product is left in an atmosphere of 50% C and 80% RH for 50 hours, then filled with water and measured for cracks when the molded product is dropped with the bottom down from a predetermined height. Drop impact The test was conducted. The evaluation standard was (◯) when none of the five molded products cracked, and (x) when even one cracked. The results are shown in Table 4.
【００２１】[0021]
【表２】 [Table 2]
【００２２】[0022]
【表３】 [Table 3]
【００２３】[0023]
【表４】 [Table 4]
【００２４】実施例５〜８ 比較例５〜８ 実施例１〜４において、スキン層に用いる樹脂組成物を
エチレングリコールとテレフタル酸からなる極限粘度が
０．７４dl／ｇのＰＥＴ樹脂とポリ（１，４ブチレンテ
レフタレート）をハードセグメントとしポリテトラメチ
レングリコールをソフトセグメントとするブロック共重
合体（共重合比率は、ポリテトラメチレングリコール成
分４３重量％）とをスクリュー径３０ｍｍの二軸混練機
を用いてブレンドした樹脂組成物（Ｂ）とする以外は同
様の評価を行った。Examples 5 to 8 Comparative Examples 5 to 8 In Examples 1 to 4, the resin composition used for the skin layer was made of ethylene glycol and terephthalic acid, a PET resin having an intrinsic viscosity of 0.74 dl / g, and poly (1). , 4 butylene terephthalate) as a hard segment and polytetramethylene glycol as a soft segment (copolymerization ratio is 43% by weight of polytetramethylene glycol component) and a twin screw kneader with a screw diameter of 30 mm. The same evaluation was performed except that the blended resin composition (B) was used.
【００２５】比較例９ 実施例３において、３つの１軸押出し機を備えた幅８０
ｃｍのＴダイを有する多層シート押出し機を用い、原料
としてスキン層、コア層ともに、エチレングリコールと
テレフタル酸からなる極限粘度が０．７５dl／ｇのＰＥ
Ｔ樹脂を使用して厚み０．３ｍｍの三層シートを押し出
す以外は同様の評価を行った。以上の結果を表５〜７に
示す。COMPARATIVE EXAMPLE 9 In Example 3, width 80 with three single screw extruders
PE with an intrinsic viscosity of 0.75 dl / g consisting of ethylene glycol and terephthalic acid as raw materials for both the skin layer and the core layer, using a multi-layer sheet extruder having a cm T-die.
The same evaluation was performed except that a three-layer sheet having a thickness of 0.3 mm was extruded using T resin. The above results are shown in Tables 5-7.
【００２６】[0026]
【表５】 [Table 5]
【００２７】[0027]
【表６】 [Table 6]
【００２８】[0028]
【表７】 [Table 7]
Claims (2)
のポリエチレンテレフタレート樹脂７０〜９０重量部、
（ｂ）ポリ（１，４ブチレンテレフタレート）をハード
セグメントとしポリテトラメチレングリコールをソフト
セグメントとするブロック共重合体１０〜３０重量部か
ら得られる樹脂組成物からなるスキン層と、極限粘度が
０．６〜１．０dl／ｇのポリエチレンテレフタレート樹
脂からなるコア層との多層構造ポリエステルシートであ
って、スキン層とコア層の重量比率が１０：９０〜４
０：６０の範囲にあることを特徴とする多層構造ポリエ
ステルシートおよびそれからなる包装容器。1. (a) Intrinsic viscosity of 0.6 to 1.0 dl / g
70 to 90 parts by weight of polyethylene terephthalate resin,
(B) A skin layer made of a resin composition obtained from 10 to 30 parts by weight of a block copolymer having poly (1,4 butylene terephthalate) as a hard segment and polytetramethylene glycol as a soft segment, and an intrinsic viscosity of 0. A multilayer polyester sheet with a core layer made of a polyethylene terephthalate resin of 6 to 1.0 dl / g, wherein the weight ratio of the skin layer to the core layer is 10:90 to 4
A multilayered polyester sheet and a packaging container comprising the same, which are in the range of 0:60.
レフタレート）成分とポリテトラメチレングリコール成
分の重量比率が５０：５０〜８５：１５の範囲にあるブ
ロック共重合体である請求項１に記載の多層構造ポリエ
ステルシートおよびそれからなる包装容器。2. The component (b) is a block copolymer in which the weight ratio of the poly (1,4 butylene terephthalate) component to the polytetramethylene glycol component is in the range of 50:50 to 85:15. And the packaging container made of the same.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP7086297A JPH08252896A (en) | 1995-03-16 | 1995-03-16 | Multilayer structure polyester sheet and packaging vessel made thereof |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP7086297A JPH08252896A (en) | 1995-03-16 | 1995-03-16 | Multilayer structure polyester sheet and packaging vessel made thereof |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JPH08252896A true JPH08252896A (en) | 1996-10-01 |
Family
ID=13882911
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP7086297A Pending JPH08252896A (en) | 1995-03-16 | 1995-03-16 | Multilayer structure polyester sheet and packaging vessel made thereof |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPH08252896A (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2010041854A3 (en) * | 2008-10-08 | 2010-11-04 | Skc Co., Ltd. | Multilayered weatherable film for solar cell |
| CN103895304A (en) * | 2012-12-28 | 2014-07-02 | 苏州度辰新材料有限公司 | Solar energy back panel and preparation method thereof |
-
1995
- 1995-03-16 JP JP7086297A patent/JPH08252896A/en active Pending
Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2010041854A3 (en) * | 2008-10-08 | 2010-11-04 | Skc Co., Ltd. | Multilayered weatherable film for solar cell |
| US20110192459A1 (en) * | 2008-10-08 | 2011-08-11 | Skc Co., Ltd. | Multilayered weatherable film for solar cell |
| KR101327470B1 (en) * | 2008-10-08 | 2013-11-08 | 에스케이씨 주식회사 | weatherable solar cell films having multi-layer |
| US9028952B2 (en) | 2008-10-08 | 2015-05-12 | Skc Co., Ltd. | Multilayered weatherable film for solar cell |
| CN103895304A (en) * | 2012-12-28 | 2014-07-02 | 苏州度辰新材料有限公司 | Solar energy back panel and preparation method thereof |
| CN103895304B (en) * | 2012-12-28 | 2015-12-09 | 苏州度辰新材料有限公司 | A kind of solar energy backboard and preparation method thereof |
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