JPH0429529B2 - - Google Patents
Info
- Publication number
- JPH0429529B2 JPH0429529B2 JP57115161A JP11516182A JPH0429529B2 JP H0429529 B2 JPH0429529 B2 JP H0429529B2 JP 57115161 A JP57115161 A JP 57115161A JP 11516182 A JP11516182 A JP 11516182A JP H0429529 B2 JPH0429529 B2 JP H0429529B2
- Authority
- JP
- Japan
- Prior art keywords
- thermoplastic resin
- temperature
- molded
- sheet
- heated
- 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 - Lifetime
Links
- 229920005992 thermoplastic resin Polymers 0.000 claims description 23
- 238000002425 crystallisation Methods 0.000 claims description 10
- 230000008025 crystallization Effects 0.000 claims description 10
- 238000004519 manufacturing process Methods 0.000 claims description 8
- 238000002844 melting Methods 0.000 claims description 8
- 230000008018 melting Effects 0.000 claims description 8
- 238000000034 method Methods 0.000 claims description 8
- 238000010438 heat treatment Methods 0.000 claims description 7
- 230000009477 glass transition Effects 0.000 claims description 6
- 229920000728 polyester Polymers 0.000 claims description 6
- 229920000098 polyolefin Polymers 0.000 claims description 2
- 229920006026 co-polymeric resin Polymers 0.000 claims 1
- 239000000203 mixture Substances 0.000 claims 1
- -1 polyethylene terephthalate Polymers 0.000 description 12
- 230000001954 sterilising effect Effects 0.000 description 5
- 238000004659 sterilization and disinfection Methods 0.000 description 5
- QQVIHTHCMHWDBS-UHFFFAOYSA-N isophthalic acid Chemical group OC(=O)C1=CC=CC(C(O)=O)=C1 QQVIHTHCMHWDBS-UHFFFAOYSA-N 0.000 description 4
- 238000000465 moulding Methods 0.000 description 4
- 229920000139 polyethylene terephthalate Polymers 0.000 description 4
- 239000005020 polyethylene terephthalate Substances 0.000 description 4
- LYCAIKOWRPUZTN-UHFFFAOYSA-N Ethylene glycol Chemical compound OCCO LYCAIKOWRPUZTN-UHFFFAOYSA-N 0.000 description 3
- KKEYFWRCBNTPAC-UHFFFAOYSA-N Terephthalic acid Chemical group OC(=O)C1=CC=C(C(O)=O)C=C1 KKEYFWRCBNTPAC-UHFFFAOYSA-N 0.000 description 3
- 239000004743 Polypropylene Substances 0.000 description 2
- ATUOYWHBWRKTHZ-UHFFFAOYSA-N Propane Chemical compound CCC ATUOYWHBWRKTHZ-UHFFFAOYSA-N 0.000 description 2
- 230000004888 barrier function Effects 0.000 description 2
- 230000000052 comparative effect Effects 0.000 description 2
- 238000001816 cooling Methods 0.000 description 2
- XNGIFLGASWRNHJ-UHFFFAOYSA-N phthalic acid Chemical group OC(=O)C1=CC=CC=C1C(O)=O XNGIFLGASWRNHJ-UHFFFAOYSA-N 0.000 description 2
- 229920001225 polyester resin Polymers 0.000 description 2
- 239000004645 polyester resin Substances 0.000 description 2
- 229920001155 polypropylene Polymers 0.000 description 2
- 229920000874 polytetramethylene terephthalate Polymers 0.000 description 2
- 229920005989 resin Polymers 0.000 description 2
- 239000011347 resin Substances 0.000 description 2
- 238000007666 vacuum forming Methods 0.000 description 2
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 2
- OFOBLEOULBTSOW-UHFFFAOYSA-N Malonic acid Chemical compound OC(=O)CC(O)=O OFOBLEOULBTSOW-UHFFFAOYSA-N 0.000 description 1
- 239000004698 Polyethylene Substances 0.000 description 1
- 239000000853 adhesive Substances 0.000 description 1
- 230000001070 adhesive effect Effects 0.000 description 1
- 125000001931 aliphatic group Chemical group 0.000 description 1
- 125000003118 aryl group Chemical group 0.000 description 1
- 238000009835 boiling Methods 0.000 description 1
- 238000009833 condensation Methods 0.000 description 1
- 230000005494 condensation Effects 0.000 description 1
- 230000008602 contraction Effects 0.000 description 1
- 229920001577 copolymer Polymers 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 238000001938 differential scanning calorimetry curve Methods 0.000 description 1
- 150000002009 diols Chemical class 0.000 description 1
- 125000002573 ethenylidene group Chemical group [*]=C=C([H])[H] 0.000 description 1
- 238000001125 extrusion Methods 0.000 description 1
- 235000013305 food Nutrition 0.000 description 1
- 239000000463 material Substances 0.000 description 1
- 238000005259 measurement Methods 0.000 description 1
- 239000000155 melt Substances 0.000 description 1
- 125000002496 methyl group Chemical group [H]C([H])([H])* 0.000 description 1
- ABMFBCRYHDZLRD-UHFFFAOYSA-N naphthalene-1,4-dicarboxylic acid Chemical group C1=CC=C2C(C(=O)O)=CC=C(C(O)=O)C2=C1 ABMFBCRYHDZLRD-UHFFFAOYSA-N 0.000 description 1
- VAWFFNJAPKXVPH-UHFFFAOYSA-N naphthalene-1,6-dicarboxylic acid Chemical group OC(=O)C1=CC=CC2=CC(C(=O)O)=CC=C21 VAWFFNJAPKXVPH-UHFFFAOYSA-N 0.000 description 1
- RXOHFPCZGPKIRD-UHFFFAOYSA-N naphthalene-2,6-dicarboxylic acid Chemical group C1=C(C(O)=O)C=CC2=CC(C(=O)O)=CC=C21 RXOHFPCZGPKIRD-UHFFFAOYSA-N 0.000 description 1
- 238000004806 packaging method and process Methods 0.000 description 1
- 229920000573 polyethylene Polymers 0.000 description 1
- 229920002635 polyurethane Polymers 0.000 description 1
- 239000004814 polyurethane Substances 0.000 description 1
- 229920000915 polyvinyl chloride Polymers 0.000 description 1
- 239000004800 polyvinyl chloride Substances 0.000 description 1
- 239000001294 propane Substances 0.000 description 1
- YPFDHNVEDLHUCE-UHFFFAOYSA-N propane-1,3-diol Chemical compound OCCCO YPFDHNVEDLHUCE-UHFFFAOYSA-N 0.000 description 1
- 229920003002 synthetic resin Polymers 0.000 description 1
- 239000000057 synthetic resin Substances 0.000 description 1
- 150000003504 terephthalic acids Chemical group 0.000 description 1
- 238000003856 thermoforming Methods 0.000 description 1
- 230000000930 thermomechanical effect Effects 0.000 description 1
- 229920001169 thermoplastic Polymers 0.000 description 1
- 239000004416 thermosoftening plastic Substances 0.000 description 1
Classifications
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
- B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
- B29C51/00—Shaping by thermoforming, i.e. shaping sheets or sheet like preforms after heating, e.g. shaping sheets in matched moulds or by deep-drawing; Apparatus therefor
- B29C51/26—Component parts, details or accessories; Auxiliary operations
- B29C51/42—Heating or cooling
- B29C51/426—Producing specific thermal regimes during thermoforming to obtain particular properties
Landscapes
- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Casting Or Compression Moulding Of Plastics Or The Like (AREA)
- Blow-Moulding Or Thermoforming Of Plastics Or The Like (AREA)
- Processing And Handling Of Plastics And Other Materials For Molding In General (AREA)
- Moulds For Moulding Plastics Or The Like (AREA)
Description
【発明の詳細な説明】
本発明は耐熱容器の製造方法に関し、特にポリ
エチレンテレフタレートに代表される結晶性熱可
塑性合成樹脂による耐熱容器の製造方法に関する
ものである。ポリエチレンテレフタレートの如き
ポリエステル樹脂は強度、剛性に富みかつガス遮
断性に優れ真空成形、圧空成形等熱成形用素材と
して有用であるが、成形された容器の耐熱性は、
ポリエステルのガラス転位温度Tgに依存し（ポ
リエチレンテレフタレートの場合75℃）、Tg以上
に加熱された場合、成形時の応力緩和による変
形、いわゆるもどり現象が生じ食品等の包装容器
としては、ボイル、レトルト等加熱殺菌処理等を
必要とする用途に応じて使用する事が出来ずその
用途展開は限定されていた。
本発明はこのような事情に鑑みて、その耐熱性
を向上させることを目的とするもので、すなわ
ち、熱可塑性樹脂Ａより成るシート又は熱可塑性
樹脂Ａとこれより融点TnB又は軟化点TsBが低い
熱可塑性樹脂Ｂとの積層体から成るシートを、熱
可塑性樹脂Ａのガラス転移温度TgA以上結晶化温
度TCA以下に加熱して、真空、圧空又は熱プレス
等の方法で成形し、成形された形状を維持したま
ま熱可塑性樹脂Ａの結晶化温度TCA以上融点TnA
以下に加熱して結晶化することを特徴とする耐熱
容器の製造方法である。
本発明で用いられる熱可塑性樹脂Ａシートと
は、テレフタル酸、イソフタル酸、フタル酸、
１，４−ナフタリンジカルボン酸、２，５−ナフ
タリンジカルボン酸、２，６−ナフタリンジカル
ボン酸、メチル基等で置換されたテレフタル酸、
イソフタル酸等の芳香族ジカルボン酸、エチレン
グリコール、プロパンジオール−１，３、プロパ
ンジオール−１，２、ブタンジオール−１，３、
ヘキサンジオール−１，６、トリメチルヘキサン
ジオール−１，６、２，2′−ジメチル・ビス−
（4′−ヒドロキシエチオシフエニル）プロパン等
ジオールとの縮合ポリエステル又は前記芳香族ジ
カルボン酸と脂肪族−および又は環状ジオールよ
り成る共重合ポリエステル等であり原則的には結
晶性を有するものであるが溶融押出法により押出
し急冷する事により、無定形状態を維持されるポ
リエステルシートである。
これら熱可塑性樹脂Ａの熱的性質は走査差動熱
量計DSC、又は熱機械分析TMAにより測定され
る。DSC、TMAによるポリエステル樹脂の分析
は、一般的に第１図及び第２図で示される。
前記熱可塑性樹脂Ａは、ガラス転移点TgA以上
のある温度に加熱することにより結晶化が始ま
る。この温度を、本明細書（特許請求の範囲を含
む）において、結晶化温度TCAと呼び、第１図、
第２図でTcで示す様にDSCではTg−Tn間の発熱
ピークとして観察され、TMAではTg−Tn間の
収縮ピークとして観察される。
熱可塑性樹脂Ａシートは単独でも用いる事が出
来るが、ヒートシート等の手段により密閉容器と
して用いる場合は不適当な場合があり、ポリエチ
レン、ポリプロピレン等ヒートシールが可能なポ
リオレフイン、ポリ塩化ビニル、ポリ塩化ビニリ
デン、等他の熱可塑性樹脂Ｂシート又はフイルム
と積層した２層以上の積層体を用いる事も可能で
あるが、熱可塑性樹脂Ｂの融点TnB又は軟化点
TSBは熱可塑性樹脂Ａの融点TnA以下である事が
必要である。
本発明における耐熱容器の製造はこの様な熱可
塑性樹脂Ａシート又はこの積層体をTgA以上TCA
以下の温度に加熱し成形金型内に挿入真空又は圧
空さらに熱プレス等の手段により成形、成形され
た形状を維持したまゝ熱可塑性樹脂Ａの結晶化温
度TCA以上、融点TnA以下の温度に加熱結晶化せ
しめる事により達成される。この様にして得られ
た耐熱容器はTgA以上の温度に加熱を行つても前
記の様な成形品のもどりによる変形は発生せず、
食品等の包装容器として用いた場合、ボイル殺菌
又は加圧水蒸気、加熱水等によるレトルト殺菌等
の加熱殺菌処理に耐え得る耐熱性を有し、かつ強
度、剛性、さらにガス遮断性に秀れ包装容器とし
て非常に有用なものとなる。
又成形容器の加熱結晶化処理は、前記成形金型
をTCA以上TnA以下の温度に加温する事により達
成される。
以下本発明の実施例について記載する。
実施例 １
ポリテトラメチレンテレフタレート樹脂を押出
機により300℃の加工温度にてＴ型ダイより冷却
ロール上に押出し厚み400μの急冷シートを得た。
このシートの一部をDSCにより熱分析を行い第
１図に示した吸発熱ピークよりガラス転移温度
TgA89℃結晶化温度TCA128℃融点TnA260℃との
測定結果を得た。
次いでこのシート１を第３図に示した成形機に
より成形を行つた。成形手順は予めヒーター２に
よりシート温度110℃に加熱し、金型３内に挿入
し、加圧成形を行つた。この時金型３は上下共埋
め込ヒーター４により150℃に加熱し成形された
シート（容器）は金型３内で15秒間保持された後
金型３より取出し成形容器を得た。
実施例 ２
ポリエチレンテレフタレート樹脂を実施例−１
と同様な手段により厚み400μのシートを得、さ
らにこのシートの一部をDSCにより熱分析を行
いガラス転位温度TgA75℃、結晶化温度TC130℃、
融点TnA258℃の結果を得た。さらにこのシート
をポリウレタン接着剤によりドライラミネーター
で厚み60μのポリプロピレンフイルムとラミネー
トを行い積層シートを得た。
得られた積層シートを実施例−１と同じ手順に
て成形を行い成形容器を得た。
比較例 １
実施例−１で製造されたポリテトラメチレンテ
レフタレートシートを公知の真空成形法により成
形を行い成形容器を得た。尚この時のシート温度
は120℃、金型温度は12℃であつた。
実施例 ３
前記実施例及び比較例に示した手段により得ら
れた成形容器をそれぞれ95℃の熱水で60分、120
℃の加熱水蒸気で30分ボイル、レトルト殺菌処理
を行つた時の容器の概観を評価しこれを表−１に
示した。
【表】DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a method for manufacturing a heat-resistant container, and more particularly to a method for manufacturing a heat-resistant container using a crystalline thermoplastic synthetic resin typified by polyethylene terephthalate. Polyester resins such as polyethylene terephthalate are strong, rigid, and have excellent gas barrier properties, making them useful as materials for thermoforming such as vacuum forming and pressure forming.
It depends on the glass transition temperature Tg of polyester (75°C in the case of polyethylene terephthalate), and when heated above Tg, deformation due to stress relaxation during molding, a so-called rebound phenomenon, occurs. It could not be used in applications that required heat sterilization, etc., and its application development was limited. In view of these circumstances, the present invention aims to improve the heat resistance of thermoplastic resin A, or a sheet made of thermoplastic resin A, or thermoplastic resin A and its melting point T nB or softening point T sB. A sheet made of a laminate with thermoplastic resin B having a low temperature is heated to a temperature above the glass transition temperature T gA and below the crystallization temperature T CA of thermoplastic resin A, and molded by a method such as vacuum, compressed air or hot press, Crystallization temperature of thermoplastic resin A T CA or higher while maintaining the molded shape Melting point T nA
This is a method for producing a heat-resistant container, which is characterized by heating and crystallizing as follows. The thermoplastic resin A sheet used in the present invention includes terephthalic acid, isophthalic acid, phthalic acid,
1,4-naphthalene dicarboxylic acid, 2,5-naphthalene dicarboxylic acid, 2,6-naphthalene dicarboxylic acid, terephthalic acid substituted with methyl group, etc.
Aromatic dicarboxylic acids such as isophthalic acid, ethylene glycol, propanediol-1,3, propanediol-1,2, butanediol-1,3,
Hexanediol-1,6, trimethylhexanediol-1,6,2,2'-dimethyl bis-
(4'-Hydroxyethiocyphenyl) A condensation polyester with a diol such as propane, or a copolymer polyester consisting of the aromatic dicarboxylic acid and an aliphatic and/or cyclic diol, etc., and in principle has crystallinity. This is a polyester sheet that maintains its amorphous state by extruding it using a melt extrusion method and rapidly cooling it. The thermal properties of these thermoplastic resins A are measured by differential scanning calorimeter DSC or thermomechanical analysis TMA. Analysis of polyester resins by DSC and TMA is generally shown in FIGS. 1 and 2. The thermoplastic resin A begins to crystallize when heated to a certain temperature above the glass transition point T gA . This temperature is referred to as the crystallization temperature T CA in this specification (including the claims), and is shown in FIG.
As shown by Tc in FIG. 2, it is observed as an exothermic peak between T g and T n in DSC, and as a contraction peak between T g and T n in TMA. Thermoplastic resin A sheet can be used alone, but it may not be suitable when used as a sealed container by means such as a heat sheet, and polyolefins that can be heat-sealed such as polyethylene and polypropylene, polyvinyl chloride, and polychloride. It is also possible to use a laminate of two or more layers laminated with other thermoplastic resin B sheets or films such as vinylidene, but the melting point T nB or softening point of thermoplastic resin B
T SB needs to be less than or equal to the melting point T nA of thermoplastic resin A. The heat-resistant container according to the present invention is produced by using such a thermoplastic resin A sheet or this laminate at a temperature of T gA or more T CA
It is heated to the following temperature and inserted into a molding die and molded by means such as vacuum or compressed air or hot press, while maintaining the molded shape . This is achieved by heating to a certain temperature to cause crystallization. The heat-resistant container obtained in this way does not undergo deformation due to the molded product returning as described above even when heated to a temperature higher than T gA .
When used as a packaging container for foods, etc., it has heat resistance that can withstand heat sterilization such as boil sterilization, retort sterilization using pressurized steam, heated water, etc., and has excellent strength, rigidity, and gas barrier properties. It will be very useful as a. The heating crystallization treatment of the molded container is achieved by heating the mold to a temperature of T CA or more and T nA or less. Examples of the present invention will be described below. Example 1 A polytetramethylene terephthalate resin was extruded from a T-shaped die onto a cooling roll using an extruder at a processing temperature of 300°C to obtain a rapidly cooled sheet having a thickness of 400 μm.
A part of this sheet was thermally analyzed by DSC, and the glass transition temperature was determined from the endothermic peak shown in Figure 1.
The measurement results were as follows: T gA 89°C Crystallization temperature T CA 128°C Melting point T nA 260°C. Next, this sheet 1 was molded using a molding machine shown in FIG. In the molding procedure, the sheet was heated in advance to a temperature of 110° C. by heater 2, inserted into mold 3, and pressure molded. At this time, the mold 3 was heated to 150° C. by heaters 4 embedded in both the upper and lower sides, and the molded sheet (container) was held in the mold 3 for 15 seconds and then taken out from the mold 3 to obtain a molded container. Example 2 Polyethylene terephthalate resin Example-1
A sheet with a thickness of 400μ was obtained by the same method as above, and a part of this sheet was thermally analyzed by DSC to find that the glass transition temperature T gA was 75℃, the crystallization temperature Tc was 130℃,
A melting point T nA of 258°C was obtained. Further, this sheet was laminated with a polypropylene film having a thickness of 60 μm using a dry laminator using a polyurethane adhesive to obtain a laminated sheet. The obtained laminated sheet was molded in the same manner as in Example-1 to obtain a molded container. Comparative Example 1 The polytetramethylene terephthalate sheet produced in Example 1 was molded by a known vacuum forming method to obtain a molded container. At this time, the sheet temperature was 120°C and the mold temperature was 12°C. Example 3 Molded containers obtained by the methods shown in the above Examples and Comparative Examples were soaked in hot water at 95°C for 60 minutes for 120 minutes.
The appearance of the container was evaluated after boiling and retort sterilization with heated steam at ℃ for 30 minutes, and the results are shown in Table 1. 【table】
第１図、第２図はそれぞれ結晶性熱可塑性樹脂
のDSC曲線、TMA曲線、第３図は本発明の製造
工程を示す説明図。
１……シート、２……ヒーター、３……金型、
４……埋め込みヒーター。
FIG. 1 and FIG. 2 are DSC curves and TMA curves of crystalline thermoplastic resin, respectively, and FIG. 3 is an explanatory diagram showing the manufacturing process of the present invention. 1... Sheet, 2... Heater, 3... Mold,
4...Embedded heater.
Claims (1)
樹脂Ａとこれより融点TnB又は軟化点TSBが低い
熱可塑性樹脂Ｂとの積層体から成るシートを、熱
可塑性樹脂Ａのガラス転移温度TgA以上結晶化温
度TCA以下に加熱して、真空、圧空又は熱プレス
等の方法で成形し、成形された形状を維持したま
ま熱可塑性樹脂Ａの結晶化温度TCA以上融点TnA
以下に加熱して結晶化することを特徴とする耐熱
容器の製造方法。 ２ 熱可塑性樹脂Ａが縮合ポリエステル又はポリ
エステル共重合樹脂であることを特徴とする前記
第１項記載の製造方法。 ３ 熱可塑性樹脂Ｂがポリオレフイン又はその配
合物であることを特徴とする前記第１項又は第２
項記載の製造方法。 ４ 金型を加熱することにより、成形されたシー
トを熱可塑性樹脂Ａの結晶化温度TCA以上融点
TnA以下に加熱することを特徴とする前記第１項
〜第３項のいずれかに記載の製造方法。[Claims] 1. A sheet made of thermoplastic resin A or a sheet made of a laminate of thermoplastic resin A and thermoplastic resin B whose melting point T nB or softening point T SB is lower than that of thermoplastic resin A. It is heated to a glass transition temperature T gA or higher and a crystallization temperature T CA or lower, and then molded using a method such as vacuum, air pressure, or hot press, and the crystallization temperature T CA or higher of thermoplastic resin A is melted while maintaining the molded shape. T nA
A method for producing a heat-resistant container, which comprises heating and crystallizing the container as follows. 2. The manufacturing method according to item 1 above, wherein the thermoplastic resin A is a condensed polyester or a polyester copolymer resin. 3. The above item 1 or 2, wherein the thermoplastic resin B is a polyolefin or a blend thereof.
Manufacturing method described in section. 4 By heating the mold, the molded sheet is heated to a temperature higher than the crystallization temperature T CA of thermoplastic resin A or its melting point.
The manufacturing method according to any one of the above items 1 to 3, characterized in that heating is performed to a temperature below T nA .
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP11516182A JPS595019A (en) | 1982-07-02 | 1982-07-02 | Manufacture of heat-resisting container |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP11516182A JPS595019A (en) | 1982-07-02 | 1982-07-02 | Manufacture of heat-resisting container |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPS595019A JPS595019A (en) | 1984-01-11 |
| JPH0429529B2 true JPH0429529B2 (en) | 1992-05-19 |
Family
ID=14655837
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP11516182A Granted JPS595019A (en) | 1982-07-02 | 1982-07-02 | Manufacture of heat-resisting container |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPS595019A (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPWO2007088833A1 (en) * | 2006-01-31 | 2009-06-25 | 吉村化成株式会社 | Thermoforming method of biodegradable laminated sheet |
Families Citing this family (12)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS60212325A (en) * | 1984-04-07 | 1985-10-24 | Mitsui Petrochem Ind Ltd | Manufacture of container made of polyethylene terephthalate |
| JPS6179626A (en) * | 1984-09-28 | 1986-04-23 | Idemitsu Petrochem Co Ltd | Annealing device of resin base plate |
| JPS62127223A (en) * | 1985-11-29 | 1987-06-09 | Teijin Ltd | Hot molding of polyester sheet |
| JP2588301B2 (en) * | 1989-08-18 | 1997-03-05 | ポリプラスチックス株式会社 | Heat-resistant container |
| JP2551854B2 (en) * | 1990-02-16 | 1996-11-06 | 積水化成品工業株式会社 | Forming method of expanded polyethylene terephthalate sheet |
| IE68430B1 (en) * | 1990-08-12 | 1996-06-12 | Polysheet Ireland Ltd | A method and apparatus for forming an article of PET material |
| JP2971934B2 (en) * | 1990-10-17 | 1999-11-08 | ポリプラスチックス株式会社 | Manufacturing method of transparent heat-resistant container |
| JP3610288B2 (en) * | 2000-08-03 | 2005-01-12 | 三菱レイヨン株式会社 | Polyester resin composition, polyester sheet and molded article thereof |
| JP2003191320A (en) * | 2001-12-25 | 2003-07-08 | Sumitomo Chem Co Ltd | Easy-to-peel molded body |
| JP4916149B2 (en) * | 2005-09-09 | 2012-04-11 | 花王株式会社 | Method for producing composite molded body |
| JP4899707B2 (en) * | 2006-08-09 | 2012-03-21 | 大日本印刷株式会社 | Method for producing heat-resistant PET container |
| JP5667804B2 (en) * | 2010-07-13 | 2015-02-12 | 積水化成品工業株式会社 | Light reflector and manufacturing method thereof |
Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS5440870A (en) * | 1977-07-25 | 1979-03-31 | Bellaplast Gmbh | Method of manufacturing thin wall product from crystalline thermoplastic material by heat molding |
-
1982
- 1982-07-02 JP JP11516182A patent/JPS595019A/en active Granted
Patent Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS5440870A (en) * | 1977-07-25 | 1979-03-31 | Bellaplast Gmbh | Method of manufacturing thin wall product from crystalline thermoplastic material by heat molding |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPWO2007088833A1 (en) * | 2006-01-31 | 2009-06-25 | 吉村化成株式会社 | Thermoforming method of biodegradable laminated sheet |
Also Published As
| Publication number | Publication date |
|---|---|
| JPS595019A (en) | 1984-01-11 |
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