JPH039821A - Polycarbonate container - Google Patents
Polycarbonate containerInfo
- Publication number
- JPH039821A JPH039821A JP1143154A JP14315489A JPH039821A JP H039821 A JPH039821 A JP H039821A JP 1143154 A JP1143154 A JP 1143154A JP 14315489 A JP14315489 A JP 14315489A JP H039821 A JPH039821 A JP H039821A
- Authority
- JP
- Japan
- Prior art keywords
- polycarbonate
- molecular weight
- injection
- container
- thickness
- 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.)
- Granted
Links
- 239000004417 polycarbonate Substances 0.000 title claims abstract description 30
- 229920000515 polycarbonate Polymers 0.000 title claims abstract description 30
- 238000002347 injection Methods 0.000 claims abstract description 6
- 239000007924 injection Substances 0.000 claims abstract description 6
- 238000001746 injection moulding Methods 0.000 abstract description 7
- 238000000034 method Methods 0.000 abstract description 6
- BVKZGUZCCUSVTD-UHFFFAOYSA-L Carbonate Chemical compound [O-]C([O-])=O BVKZGUZCCUSVTD-UHFFFAOYSA-L 0.000 abstract description 4
- ATUOYWHBWRKTHZ-UHFFFAOYSA-N Propane Chemical compound CCC ATUOYWHBWRKTHZ-UHFFFAOYSA-N 0.000 abstract description 4
- 238000004519 manufacturing process Methods 0.000 abstract description 4
- 239000002243 precursor Substances 0.000 abstract description 4
- 238000010438 heat treatment Methods 0.000 abstract description 3
- YGYAWVDWMABLBF-UHFFFAOYSA-N Phosgene Chemical compound ClC(Cl)=O YGYAWVDWMABLBF-UHFFFAOYSA-N 0.000 abstract description 2
- ROORDVPLFPIABK-UHFFFAOYSA-N diphenyl carbonate Chemical compound C=1C=CC=CC=1OC(=O)OC1=CC=CC=C1 ROORDVPLFPIABK-UHFFFAOYSA-N 0.000 abstract description 2
- 239000001294 propane Substances 0.000 abstract description 2
- 239000000243 solution Substances 0.000 abstract description 2
- 238000007500 overflow downdraw method Methods 0.000 abstract 1
- 235000013305 food Nutrition 0.000 description 11
- 239000004793 Polystyrene Substances 0.000 description 9
- 229920002223 polystyrene Polymers 0.000 description 9
- IISBACLAFKSPIT-UHFFFAOYSA-N bisphenol A Chemical compound C=1C=C(O)C=CC=1C(C)(C)C1=CC=C(O)C=C1 IISBACLAFKSPIT-UHFFFAOYSA-N 0.000 description 4
- 229930185605 Bisphenol Natural products 0.000 description 2
- 230000000052 comparative effect Effects 0.000 description 2
- ISWSIDIOOBJBQZ-UHFFFAOYSA-N Phenol Chemical compound OC1=CC=CC=C1 ISWSIDIOOBJBQZ-UHFFFAOYSA-N 0.000 description 1
- 239000006085 branching agent Substances 0.000 description 1
- 125000002915 carbonyl group Chemical group [*:2]C([*:1])=O 0.000 description 1
- -1 carbonyl halides Chemical class 0.000 description 1
- 239000003054 catalyst Substances 0.000 description 1
- 230000007423 decrease Effects 0.000 description 1
- 238000001035 drying Methods 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 238000011156 evaluation Methods 0.000 description 1
- 239000000155 melt Substances 0.000 description 1
- 238000000465 moulding Methods 0.000 description 1
- 239000008188 pellet Substances 0.000 description 1
- 230000001737 promoting effect Effects 0.000 description 1
- 239000002994 raw material Substances 0.000 description 1
Classifications
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B65—CONVEYING; PACKING; STORING; HANDLING THIN OR FILAMENTARY MATERIAL
- B65D—CONTAINERS FOR STORAGE OR TRANSPORT OF ARTICLES OR MATERIALS, e.g. BAGS, BARRELS, BOTTLES, BOXES, CANS, CARTONS, CRATES, DRUMS, JARS, TANKS, HOPPERS, FORWARDING CONTAINERS; ACCESSORIES, CLOSURES, OR FITTINGS THEREFOR; PACKAGING ELEMENTS; PACKAGES
- B65D1/00—Containers having bodies formed in one piece, e.g. by casting metallic material, by moulding plastics, by blowing vitreous material, by throwing ceramic material, by moulding pulped fibrous material, by deep-drawing operations performed on sheet material
- B65D1/02—Bottles or similar containers with necks or like restricted apertures, designed for pouring contents
- B65D1/0207—Bottles or similar containers with necks or like restricted apertures, designed for pouring contents characterised by material, e.g. composition, physical features
Abstract
Description
【発明の詳細な説明】
〈産業上の利用分野〉
本発明は、ポリカーボネート製容器、特に薄肉深絞りの
ポリカーボネート製容器に関する。DETAILED DESCRIPTION OF THE INVENTION <Industrial Application Field> The present invention relates to a polycarbonate container, particularly a thin-walled deep-drawn polycarbonate container.
〈従来技術〉
従来、使い捨ての食品用容器等にポリスチレンが多用さ
れている。即ち、ポリスチレンは良好な透明性を有し且
つ加工が容易であるが故に使い捨ての食品用容器等に多
用されている。<Prior Art> Conventionally, polystyrene has been widely used for disposable food containers and the like. That is, polystyrene has good transparency and is easy to process, so it is often used in disposable food containers and the like.
近年、使い捨ての食品容器には、加熱加工した食品の充
填、食品を充填したままでの加熱処理、冷凍倉庫での保
管、更には食品を充填したままでの電子レンジでの調理
等の要望が強く、耐熱性や耐冷性が要求され、ポリスチ
レンでは対応できない状況に芋っている。しかも、ポリ
スチレンは耐雨９Ｊ性が劣るため、輸送時の破損、使用
時の取扱難さ等重大な欠点もある。In recent years, there have been demands for disposable food containers to be filled with heat-processed food, heat treated with food still in them, stored in frozen warehouses, and even cooked in microwave ovens with food still in them. Polystyrene is required to be strong and resistant to heat and cold, making it difficult to meet the needs of polystyrene. Moreover, since polystyrene has poor rain resistance (9J), it has serious drawbacks such as breakage during transportation and difficulty in handling during use.
〈発明の目的〉
本発明の目的は、上記欠点のない食品用容器を提供せん
とするにある。<Object of the invention> The object of the invention is to provide a food container free from the above-mentioned drawbacks.
本発明者は、透明性、耐熱性、耐衝撃性のいずれにも優
れたポリカーボネートを用いて食品用容器を製造せんと
試みたところ、粘度平均分子ｆｉ ２Ｇ、 ０００以上
の汎用ポリカーボネートでは、薄肉深絞りの容器、特に
肉厚１ａ＋ｍ以下で、且っＬ／Ｔが１００以上の薄肉容
器を射出成形によって工業的規模でｙＪ造することは不
可能であった。The present inventor attempted to manufacture food containers using polycarbonate, which has excellent transparency, heat resistance, and impact resistance, and found that general-purpose polycarbonate with a viscosity average molecular fi of 2G, 000 or more was thin and deep. It has been impossible to manufacture drawn containers, especially thin-walled containers with a wall thickness of 1 a+m or less and a L/T of 100 or more, on an industrial scale by injection molding.
本発明者は、ポリカーボネートを射出成形で肉厚１１Ｉ
以下で且つＬ／Ｔが１００以上の薄肉容器を成形するこ
とを意図してポリカーボネートの分子量を低下させるこ
とを検討した。しかしながら、この分子量を低下させる
に従って、その耐衝撃性は急激に低下し、ポリスチレン
並になる。例えば１ ／ ８ ″アイゾツトノツチ付衝
撃値で、ポリスチレンは２〜２．５ ｋｇｆ ｃｍ／ｃ
ｍであるのに対し、粘度平均分子ωｉｓ、ｏｏｏのポリ
カーボネートは１〜５ ｋｇｆ ｃｍ／ｃｍとポリス
チレンと同程度まで低下する。このため、低分子量ポリ
カーボネートの使用を一旦は断念した。しかし、念のた
め低分子量ポリカーボネートを使用して薄肉容器を射出
成形したところ、驚くべきことに、充分な強度を有する
容器が得られることを知った。本発明前は、この知見に
基いて、史に、検討を重ねた結果、特定節回の分子量を
持つ低分子子ポリカーボネー１−を射出成形すれば、目
的とする実用１浸れた薄肉深絞りの？ｙ器、特に肉厚１
１以下で且つＬ／Ｔが１００以上の薄肉容器が得られる
ことを究明し、本発明に到達したものである。なお、こ
こでいうＬ／ＴのＬはキャビティのゲートから最遠部ま
での距離、王はその間の厚さである。The present inventor made polycarbonate with a wall thickness of 11I by injection molding.
In the following, we investigated reducing the molecular weight of polycarbonate with the intention of molding a thin-walled container with L/T of 100 or more. However, as this molecular weight is lowered, its impact resistance rapidly decreases and becomes comparable to polystyrene. For example, the impact value of polystyrene with a 1/8 inch isotnotch is 2 to 2.5 kgf cm/c.
m, whereas the viscosity average molecular weight of polycarbonate is 1 to 5 kgf cm/cm, which is the same level as polystyrene. For this reason, we temporarily abandoned the use of low molecular weight polycarbonate. However, when they injection-molded a thin container using low molecular weight polycarbonate just in case, they surprisingly found that they were able to obtain a container with sufficient strength. Prior to the present invention, based on this knowledge, as a result of repeated studies, it was found that if low molecular weight polycarbonate 1- with a molecular weight of a specific number of degrees was injection molded, it would be possible to achieve the desired practical use by thin deep drawing. of? Y vessel, especially wall thickness 1
It was discovered that a thin walled container with a L/T of 1 or less and a L/T of 100 or more could be obtained, and the present invention was achieved. In addition, L of L/T here is the distance from the gate of the cavity to the farthest part, and the distance is the thickness therebetween.
〈発明の構成〉
本発明は、粘度平均分子量１４，０００〜１８，０００
のポリカーボネートを射出成形してなる肉厚１＋ｍ以下
で［１つＬ／Ｔが１００以上のポリカーボネート製容器
に係るものである。<Structure of the invention> The present invention provides a viscosity average molecular weight of 14,000 to 18,000.
This relates to a polycarbonate container with a wall thickness of 1+m or less and a L/T of 100 or more, which is made by injection molding polycarbonate.
本発明で使用するポリカーボネートは、２，２−ビス（
４−ヒドロキシフ１ニル）プロパン［ビスフェノールＡ
Ｊを主たる原料とし、これとカーボネート前駆体とを溶
液法又は溶融法で反応させて得られるものである。カー
ボネート前駆体としてはカルボニルハライド、カルボニ
ルエステル又はハロホルタ−１−等があげられ、具体的
にはホスゲン、ジフェニルカーボネート、ビスフェノー
ルへのジハロホルメート等である。ポリカーボネートを
製造するに当たり、ビスフェノール△の一部を他の２
ｆ１１６フエノールで置換えることができ、また適当な
分子ｍ調節剤、反応を促進するための触媒、加工性改善
のための分岐剤等必要に応じて使用することができる。The polycarbonate used in the present invention is 2,2-bis(
4-Hydroxyphinyl)propane [bisphenol A
It is obtained by using J as the main raw material and reacting it with a carbonate precursor by a solution method or a melt method. Examples of carbonate precursors include carbonyl halides, carbonyl esters, and haloformates, such as phosgene, diphenyl carbonate, and dihaloformates to bisphenol. When manufacturing polycarbonate, a part of bisphenol △ is mixed with other two.
It can be replaced with f116 phenol, and a suitable molecular m regulator, a catalyst for promoting the reaction, a branching agent for improving processability, etc. can be used as necessary.
ポリカーボネートの粘度平均分子量は、１４．０００〜
１８．０００、好ましくは１４，５００〜１７，０００
である。ポリカーボネートの粘度平均分子ｍが、１４．
０００より低いと、充分な強度を有する容器は得られ難
く、１８．０００より高くなると、目的とする薄肉深絞
りの容器、特に肉厚１＋ｍ以下で且つＬ／Ｔが１００以
上の薄肉容器を射出成形し難くなる。The viscosity average molecular weight of polycarbonate is 14.000~
18,000, preferably 14,500-17,000
It is. The viscosity average molecule m of polycarbonate is 14.
If it is lower than 000, it will be difficult to obtain a container with sufficient strength, and if it is higher than 18.000, it will be difficult to obtain a container with sufficient strength. It becomes difficult to mold.
かかるポリカーボネートを射出成形するに当っては、格
別な条件を採用する必要はなく、通常シリンダー先端加
熱帯温度２８０〜３８０℃、射出圧力８００〜３０００
ｋ（Ｊ／ ｃｌｉ、金型温度８０〜１４０℃の鞘囲から
適宜選択される。なかでも射出圧力を例えば１０００ｋ
Ｏ／ＣＩｉ以上と高く設定するのが好ましい。When injection molding such polycarbonate, there is no need to adopt special conditions, and the cylinder tip heating zone temperature is usually 280-380°C and the injection pressure is 800-3000°C.
k (J/cli, the shell circumference is appropriately selected from a mold temperature of 80 to 140°C. Among them, the injection pressure is set to, for example, 1000 k
It is preferable to set it as high as O/CIi or more.
本発明でいう容器は、肉厚１１Ｉｌｌ以下で、且つＬ／
Ｔが１００以上の薄肉容器である。肉厚が１１ＩＩより
厚い容器、及び／又はＬ／Ｔが１００未満の容器は、本
発明によらずとも、粘度平均分子量２０．０００〜３０
．０００の汎用のポリカーボネートで成形可能である。The container referred to in the present invention has a wall thickness of 11 Ill or less and L/L
It is a thin-walled container with T of 100 or more. Containers with a wall thickness of more than 11II and/or containers with an L/T of less than 100 may have a viscosity average molecular weight of 20.000 to 30, even if not according to the present invention.
．． 000 general-purpose polycarbonate.
また、その形状は、特に制限する必要はなく、例えばコ
ツプ状、深皿状、封状等任意の形状のものであってよい
。Further, the shape thereof does not need to be particularly limited, and may be any shape, such as a cup shape, a deep dish shape, or a seal shape.
〈発明の効果〉
本発明によれば、従来考え及ばなかった薄肉深絞りのポ
リカーボネート製容器、特に肉厚１ｍｍ以下で且つ１７
丁が１００以上の薄肉のポリカーボネート製透明容器の
提供を始めて可能にし、従来より要望されていた加熱加
工した食品の充填、食品を充填したままでの加熱処理、
冷凍倉庫での保管、更には食品を充填したままでの電子
レンジでの調理等が可能で且つ輸送時に破損し難く、取
扱い易い薄肉深絞りの透明容器の提供を可能にしたもの
である。<Effects of the Invention> According to the present invention, a thin-walled deep-drawn polycarbonate container, which has not been thought of in the past, especially a container made of thin-walled deep-drawn polycarbonate with a wall thickness of 1 mm or less and
For the first time, we have made it possible to provide thin-walled transparent polycarbonate containers with a thickness of 100 or more, and we have been able to fill them with heat-processed foods, which has been requested in the past, and heat-treat them while they are filled with food.
To provide a thin, deep-drawn transparent container that can be stored in a frozen warehouse and furthermore cooked in a microwave oven while filled with food, is not easily damaged during transportation, and is easy to handle.
〈実施例〉
以下に実施例をあげて更に説明する。なお、容器の評価
は下記の方法によった。<Example> Examples will be given below for further explanation. The containers were evaluated using the following method.
耐熱性＝１２５℃のｍＭ中に１２０分間放置して変形の
有無を調べた。変形しないものを
○、変形したものを×で示した。Heat resistance = The presence or absence of deformation was examined after being left in mM at 125°C for 120 minutes. Those that were not deformed were shown as ○, and those that were deformed were shown as ×.
強 度：容器の最上部を掴んで押し潰した後解放し、解
放後の状態で示した。破壊さ
れないものをＯ１破壊し〕たものを×で示した。Strength: The top of the container was grasped and crushed, then released, and the state after release is shown. Those that were not destroyed were shown as ×.
実施例１〜５及び比較例１〜３
第１表記載の粘度平均分子間のごスフエノールＡから得
られたポリカーボネートベレットを１２０℃で８Ｆｊ：
１間乾燥した後、３オンスの射出成形機を用いて表記載
の条件で、底部直径６Ｑａ＋ｍ、土部直径７０■膳、高
さ５０１ＩＩｌのコツプを成形した。Examples 1 to 5 and Comparative Examples 1 to 3 Polycarbonate pellets obtained from sphenol A with viscosity average molecular weight listed in Table 1 were heated at 120°C to 8Fj:
After drying for 1 hour, a pot having a bottom diameter of 6Qa+m, a base diameter of 70mm, and a height of 501IIl was molded using a 3-ounce injection molding machine under the conditions listed in the table.
得られたコツプの評価結果を第１表に示した。The evaluation results of the obtained chips are shown in Table 1.
更に、比較のため市販のポリスチレンを用いて実施例１
と同一形状のコツプを射出成形（比較例３）し、同様に
評価したところ耐熱性、強度のいずれもＸであった。Furthermore, for comparison, Example 1 was prepared using commercially available polystyrene.
When a cup having the same shape as the above was injection molded (Comparative Example 3) and evaluated in the same manner, it was found to be X in both heat resistance and strength.
（以下余白）
表中の設定温度はシリンダーの先端加熱帯の設定温度で
ある。(Left below) The set temperature in the table is the set temperature of the heating zone at the tip of the cylinder.
Claims (1)
ボネートを射出成形してなる肉厚１ｍｍ以下で且つＬ／
Ｔが１００以上のポリカーボネート製容器。Made of injection molded polycarbonate with a viscosity average molecular weight of 14,000 to 18,000, with a wall thickness of 1 mm or less and L/
Polycarbonate container with T of 100 or more.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP14315489A JPH0659665B2 (en) | 1989-06-07 | 1989-06-07 | Polycarbonate container |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP14315489A JPH0659665B2 (en) | 1989-06-07 | 1989-06-07 | Polycarbonate container |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPH039821A true JPH039821A (en) | 1991-01-17 |
| JPH0659665B2 JPH0659665B2 (en) | 1994-08-10 |
Family
ID=15332178
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP14315489A Expired - Fee Related JPH0659665B2 (en) | 1989-06-07 | 1989-06-07 | Polycarbonate container |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPH0659665B2 (en) |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH0661337A (en) * | 1992-06-19 | 1994-03-04 | Internatl Business Mach Corp <Ibm> | Movile container |
| US6568105B1 (en) | 1997-10-23 | 2003-05-27 | Ando Electric Co., Ltd. | External cavity laser type light source |
| DE102010000450A1 (en) | 2009-02-25 | 2010-09-02 | Toyota Jidosha Kabushiki Kaisha, Toyota-shi | Method for the production of a hollow cast part with an internal cavity, comprises arranging a cavity-forming element with a hollow section open to part and an integral microporous element mounted on the element, in a mold |
-
1989
- 1989-06-07 JP JP14315489A patent/JPH0659665B2/en not_active Expired - Fee Related
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH0661337A (en) * | 1992-06-19 | 1994-03-04 | Internatl Business Mach Corp <Ibm> | Movile container |
| US6568105B1 (en) | 1997-10-23 | 2003-05-27 | Ando Electric Co., Ltd. | External cavity laser type light source |
| DE102010000450A1 (en) | 2009-02-25 | 2010-09-02 | Toyota Jidosha Kabushiki Kaisha, Toyota-shi | Method for the production of a hollow cast part with an internal cavity, comprises arranging a cavity-forming element with a hollow section open to part and an integral microporous element mounted on the element, in a mold |
Also Published As
| Publication number | Publication date |
|---|---|
| JPH0659665B2 (en) | 1994-08-10 |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| LAPS | Cancellation because of no payment of annual fees |