JPH0241225A - Molded form of styrene resin biaxial orientation sheet - Google Patents
Molded form of styrene resin biaxial orientation sheetInfo
- Publication number
- JPH0241225A JPH0241225A JP19070188A JP19070188A JPH0241225A JP H0241225 A JPH0241225 A JP H0241225A JP 19070188 A JP19070188 A JP 19070188A JP 19070188 A JP19070188 A JP 19070188A JP H0241225 A JPH0241225 A JP H0241225A
- Authority
- JP
- Japan
- Prior art keywords
- molded
- syndiotactic polystyrene
- polystyrene resin
- density
- dimensional change
- 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
- 229920005989 resin Polymers 0.000 title claims abstract description 16
- 239000011347 resin Substances 0.000 title claims abstract description 16
- PPBRXRYQALVLMV-UHFFFAOYSA-N Styrene Chemical compound C=CC1=CC=CC=C1 PPBRXRYQALVLMV-UHFFFAOYSA-N 0.000 title description 6
- 229920010524 Syndiotactic polystyrene Polymers 0.000 claims abstract description 18
- 238000000465 moulding Methods 0.000 claims abstract description 11
- IJGRMHOSHXDMSA-UHFFFAOYSA-N Atomic nitrogen Chemical compound N#N IJGRMHOSHXDMSA-UHFFFAOYSA-N 0.000 claims abstract description 8
- 238000002834 transmittance Methods 0.000 claims abstract description 7
- OAICVXFJPJFONN-UHFFFAOYSA-N Phosphorus Chemical compound [P] OAICVXFJPJFONN-UHFFFAOYSA-N 0.000 claims abstract description 4
- XUIMIQQOPSSXEZ-UHFFFAOYSA-N Silicon Chemical group [Si] XUIMIQQOPSSXEZ-UHFFFAOYSA-N 0.000 claims abstract description 4
- 229910052757 nitrogen Inorganic materials 0.000 claims abstract description 4
- 229910052760 oxygen Inorganic materials 0.000 claims abstract description 4
- 239000001301 oxygen Substances 0.000 claims abstract description 4
- 229910052698 phosphorus Inorganic materials 0.000 claims abstract description 4
- 239000011574 phosphorus Substances 0.000 claims abstract description 4
- 125000001424 substituent group Chemical group 0.000 claims abstract description 4
- OKTJSMMVPCPJKN-UHFFFAOYSA-N Carbon Chemical compound [C] OKTJSMMVPCPJKN-UHFFFAOYSA-N 0.000 claims abstract description 3
- 229910052799 carbon Inorganic materials 0.000 claims abstract description 3
- 125000005843 halogen group Chemical group 0.000 claims abstract description 3
- 125000004435 hydrogen atom Chemical group [H]* 0.000 claims abstract description 3
- QVGXLLKOCUKJST-UHFFFAOYSA-N atomic oxygen Chemical compound [O] QVGXLLKOCUKJST-UHFFFAOYSA-N 0.000 claims description 3
- 239000000126 substance Substances 0.000 claims 1
- 238000010438 heat treatment Methods 0.000 abstract description 8
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 abstract description 5
- 238000009835 boiling Methods 0.000 abstract description 4
- 238000010411 cooking Methods 0.000 abstract description 4
- MYMOFIZGZYHOMD-UHFFFAOYSA-N Dioxygen Chemical compound O=O MYMOFIZGZYHOMD-UHFFFAOYSA-N 0.000 abstract 1
- 229910052710 silicon Inorganic materials 0.000 abstract 1
- 238000000034 method Methods 0.000 description 10
- 239000004793 Polystyrene Substances 0.000 description 7
- 229920002223 polystyrene Polymers 0.000 description 7
- 238000001816 cooling Methods 0.000 description 6
- 238000002425 crystallisation Methods 0.000 description 6
- 230000008025 crystallization Effects 0.000 description 6
- 238000002844 melting Methods 0.000 description 6
- 230000008018 melting Effects 0.000 description 6
- RTZKZFJDLAIYFH-UHFFFAOYSA-N Diethyl ether Chemical compound CCOCC RTZKZFJDLAIYFH-UHFFFAOYSA-N 0.000 description 4
- 230000009477 glass transition Effects 0.000 description 4
- PBKONEOXTCPAFI-UHFFFAOYSA-N 1,2,4-trichlorobenzene Chemical compound ClC1=CC=C(Cl)C(Cl)=C1 PBKONEOXTCPAFI-UHFFFAOYSA-N 0.000 description 3
- ZWEHNKRNPOVVGH-UHFFFAOYSA-N 2-Butanone Chemical compound CCC(C)=O ZWEHNKRNPOVVGH-UHFFFAOYSA-N 0.000 description 3
- OKKJLVBELUTLKV-UHFFFAOYSA-N Methanol Chemical compound OC OKKJLVBELUTLKV-UHFFFAOYSA-N 0.000 description 3
- 238000005481 NMR spectroscopy Methods 0.000 description 3
- YXFVVABEGXRONW-UHFFFAOYSA-N Toluene Chemical compound CC1=CC=CC=C1 YXFVVABEGXRONW-UHFFFAOYSA-N 0.000 description 3
- 238000004519 manufacturing process Methods 0.000 description 3
- LFQSCWFLJHTTHZ-UHFFFAOYSA-N Ethanol Chemical compound CCO LFQSCWFLJHTTHZ-UHFFFAOYSA-N 0.000 description 2
- VEXZGXHMUGYJMC-UHFFFAOYSA-N Hydrochloric acid Chemical compound Cl VEXZGXHMUGYJMC-UHFFFAOYSA-N 0.000 description 2
- XEEYBQQBJWHFJM-UHFFFAOYSA-N Iron Chemical compound [Fe] XEEYBQQBJWHFJM-UHFFFAOYSA-N 0.000 description 2
- 238000006243 chemical reaction Methods 0.000 description 2
- 239000000470 constituent Substances 0.000 description 2
- 235000013305 food Nutrition 0.000 description 2
- 238000005227 gel permeation chromatography Methods 0.000 description 2
- 125000001997 phenyl group Chemical group [H]C1=C([H])C([H])=C(*)C([H])=C1[H] 0.000 description 2
- 230000000704 physical effect Effects 0.000 description 2
- JIAARYAFYJHUJI-UHFFFAOYSA-L zinc dichloride Chemical compound [Cl-].[Cl-].[Zn+2] JIAARYAFYJHUJI-UHFFFAOYSA-L 0.000 description 2
- OCJBOOLMMGQPQU-UHFFFAOYSA-N 1,4-dichlorobenzene Chemical compound ClC1=CC=C(Cl)C=C1 OCJBOOLMMGQPQU-UHFFFAOYSA-N 0.000 description 1
- 238000004458 analytical method Methods 0.000 description 1
- 239000011203 carbon fibre reinforced carbon Substances 0.000 description 1
- 238000001739 density measurement Methods 0.000 description 1
- 229940117389 dichlorobenzene Drugs 0.000 description 1
- 238000001035 drying Methods 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- XGZNHFPFJRZBBT-UHFFFAOYSA-N ethanol;titanium Chemical compound [Ti].CCO.CCO.CCO.CCO XGZNHFPFJRZBBT-UHFFFAOYSA-N 0.000 description 1
- 239000011261 inert gas Substances 0.000 description 1
- 229910052742 iron Inorganic materials 0.000 description 1
- 238000005259 measurement Methods 0.000 description 1
- 238000000691 measurement method Methods 0.000 description 1
- CPOFMOWDMVWCLF-UHFFFAOYSA-N methyl(oxo)alumane Chemical compound C[Al]=O CPOFMOWDMVWCLF-UHFFFAOYSA-N 0.000 description 1
- 239000012046 mixed solvent Substances 0.000 description 1
- 239000000203 mixture Substances 0.000 description 1
- 239000003921 oil Substances 0.000 description 1
- 238000004806 packaging method and process Methods 0.000 description 1
- 229920001596 poly (chlorostyrenes) Polymers 0.000 description 1
- -1 polyalkylstyrene Polymers 0.000 description 1
- 229920003056 polybromostyrene Polymers 0.000 description 1
- 229920000642 polymer Polymers 0.000 description 1
- 238000006116 polymerization reaction Methods 0.000 description 1
- 238000005096 rolling process Methods 0.000 description 1
- 238000010183 spectrum analysis Methods 0.000 description 1
- 229910001220 stainless steel Inorganic materials 0.000 description 1
- 239000010935 stainless steel Substances 0.000 description 1
- 230000001954 sterilising effect Effects 0.000 description 1
- 238000004659 sterilization and disinfection Methods 0.000 description 1
- 150000003440 styrenes Polymers 0.000 description 1
- 125000003011 styrenyl group Polymers [H]\C(*)=C(/[H])C1=C([H])C([H])=C([H])C([H])=C1[H] 0.000 description 1
- 230000002087 whitening effect Effects 0.000 description 1
- 239000011592 zinc chloride Substances 0.000 description 1
- 235000005074 zinc chloride Nutrition 0.000 description 1
Landscapes
- Blow-Moulding Or Thermoforming Of Plastics Or The Like (AREA)
- Shaping By String And By Release Of Stress In Plastics And The Like (AREA)
Abstract
Description
【発明の詳細な説明】
（産業上の利用分野）
本発明は、シンジオタックチックポリスチレン系樹脂二
軸延伸シートを成形してなる成形体に関し、たとえば電
子レンジ用容器として含油脂食品を加熱調理する際にも
変形を起こさない高温耐油性を兼ね備えた容器として利
用できる新規な成形体に関する。Detailed Description of the Invention (Field of Industrial Application) The present invention relates to a molded article formed by molding a syndiotactic polystyrene resin biaxially oriented sheet, and is used, for example, as a container for a microwave oven to heat and cook oil- and fat-containing foods. The present invention relates to a novel molded product that can be used as a container that does not deform even when heated and has high temperature oil resistance.
（従来技術）
ポリスチレンの二軸延伸シートの成形体はその透明性、
剛性に優れていることから軽量容器等に大量に使用され
ている。しかしこれら容器は耐熱性に劣るため、沸騰水
に直接接触する用途や、近年急速に普及した電子レンジ
による加熱調理用途には全く使用されていない。(Prior art) Moldings of biaxially stretched polystyrene sheets are characterized by their transparency,
Due to its excellent rigidity, it is used in large quantities for lightweight containers, etc. However, since these containers have poor heat resistance, they are not used at all for applications in which they come into direct contact with boiling water or for heating in microwave ovens, which have become rapidly popular in recent years.
（発明が解決しようとする課題）
本発明は上記の問題点を解決した、即ち、耐熱性があり
、沸騰水に直接接触する用途、電子レンジによる加熱調
理用途に使用しえる成形体を提供するものである。(Problems to be Solved by the Invention) The present invention solves the above problems, that is, provides a molded article that is heat resistant and can be used for applications that come into direct contact with boiling water and for cooking in a microwave oven. It is something.
（課題を解決するための手段）
すなわち本発明はシンジオタックチックポリスチレン系
樹脂を成形してなる成形体であって■該シンジオタック
チックポリスチレン系樹脂が式
（式中、Ｒは水素原子、ハロゲン原子、あるいは炭素、
酸素、窒素、リンまたは珪素原子を含む置換基を示し、
ｎは１〜３の整数を示す。）■該成形体の全光線透過率
が９０％以上の透明性を有し、該成形体の２５°Ｃにお
ける密度が１．００〜１．１５であり、且つ１２０ ’
Ｃの乾熱オーブン中で５分間加熱した時の該成形体の寸
法変化率が５％未満であることを特徴とする、シンジオ
タックチックポリスチレン系樹脂シートを成形してなる
成形体を提供するものである。(Means for Solving the Problems) That is, the present invention provides a molded article formed by molding a syndiotactic polystyrene resin, wherein the syndiotactic polystyrene resin has the formula (in the formula, R is a hydrogen atom, halogen atom or carbon,
indicates a substituent containing oxygen, nitrogen, phosphorus or silicon atoms,
n represents an integer of 1 to 3. )■ The molded product has transparency with a total light transmittance of 90% or more, the density of the molded product at 25°C is 1.00 to 1.15, and 120'
To provide a molded article formed by molding a syndiotactic polystyrene resin sheet, which has a dimensional change rate of less than 5% when heated for 5 minutes in a dry heat oven (C). It is something.
以下、本発明について詳細に説明する。The present invention will be explained in detail below.
まず上記■の構成要件、すなわち、式
（式中、Ｒは水素原子、ハロゲン原子、あるいは炭素、
酸素、窒素、リンまたは珪素原子を含む置換基を示し、
ｎは１〜３の整数を示す。）高立体規則性のシンジオタ
ックチックポリスチレン系樹脂は、炭素−炭素結合から
形成される主鎖に対して、側鎖であるフェニル、または
置換フェニル基が主として交互に反対方向に位置する立
体構造を有するものであって、そのタクチシテーは核磁
気共鳴法（ＮＭＲ法）により定量される。このＮＭＲ法
により測定されるタクチシテーは連続する複数個の構成
単位の存在する割合、例えば二個の場合にはダイアツド
、三個の場合にはトリアット、五個の場合にはペンタッ
ドで表すことができるが本発明で言うシンジオタックチ
ックポリスチレン系樹脂の構造は、通常ダイアツドで８
５％以上、もしくはペンタッドで５０％以上のシンジオ
タックチック構造を有するものを意味する。First, the constituent elements of the above (■) are as follows:
indicates a substituent containing oxygen, nitrogen, phosphorus or silicon atoms,
n represents an integer of 1 to 3. ) Highly stereoregular syndiotactic polystyrene resins have a three-dimensional structure in which phenyl side chains or substituted phenyl groups are mainly located alternately in opposite directions with respect to the main chain formed from carbon-carbon bonds. The tacticity is determined by nuclear magnetic resonance (NMR). Tacticity measured by this NMR method can be expressed as the proportion of consecutive constituent units, such as diats for two units, triats for three units, and pentads for five units. However, the structure of the syndiotactic polystyrene resin referred to in the present invention is usually 8 diads.
It means having a syndiotactic structure of 5% or more, or 50% or more in terms of pentads.
次にゲルパーミネーションクロマトグラフィー（１，２
，４−）ジクロロベンゼン中、１３０°Ｃで測定）によ
り測定される重量平均分子量は１．ＸｉＯ’〜５Ｘ１０
’の範囲で４選ぶことが好ましい。Next, gel permeation chromatography (1,2
, 4-) in dichlorobenzene at 130°C) is 1. XiO'~5X10
It is preferable to select 4 in the range '.
該シンジオタックチックポリスチレン系樹脂としては、
ポリスチレンをはじめ、ポリアルキルスチレンやポリハ
ロゲン化スチレン、ポリハロゲン置換アルキルスチレン
、ポリアルコキシスチレン、ポリカルボキシアルキルス
チレン、ポリアルキルエーテルスチレンなどの種々の核
置換ポリスチレンが挙げられる。核置換ポリスチレンの
具体例としては、ポリメチルスチレン、ポリジメチルス
チレン、ポリブチルスチレン、ポリクロロスチレン、ポ
リブロモスチレン、ポリフルオロスチレン、ポリメトキ
シスチレン、ポリエトキシスチレン、ポリカルボキシス
チレン、ポリビニルベンジルプロピルエーテル、ポリト
リメチルシリルスチレンなどが挙げられる。As the syndiotactic polystyrene resin,
Various nuclear-substituted polystyrenes such as polystyrene, polyalkylstyrene, polyhalogenated styrene, polyhalogen-substituted alkylstyrene, polyalkoxystyrene, polycarboxyalkylstyrene, and polyalkyl ether styrene can be mentioned. Specific examples of nuclear-substituted polystyrene include polymethylstyrene, polydimethylstyrene, polybutylstyrene, polychlorostyrene, polybromostyrene, polyfluorostyrene, polymethoxystyrene, polyethoxystyrene, polycarboxystyrene, polyvinylbenzylpropyl ether, Examples include polytrimethylsilylstyrene.
次に第■の構成要件である全光線透過率が９０％以上の
透明性を有し、２５°Ｃにおける密度が１、ＯＯ〜１．
１５であり、且つ１２０ ’Ｃの乾熱オーブン中で５分
間加熱した時の寸法変化率が５％未満である成形体を得
る成形方法について述べる。Next, the second component is transparency with a total light transmittance of 90% or more, and a density at 25°C of 1, OO to 1.
15, and the dimensional change rate when heated for 5 minutes in a dry heat oven at 120'C is less than 5%.
まず上記のシンジオタックチックポリスチレン系樹脂を
、実質上無定系のシートに成形する。成形方法としては
、シンジオタックチックポリスチレン系樹脂の融点以上
の温度で、プレスまたはＴダイなどを用いて成形したシ
ートを、冷却プレスまたは冷却ロールを用いて、好まし
くは１５０°Ｃ／分以上の冷却速度で急冷することによ
り、実質上、無定形のシートを得ることができる。この
際、冷却速度が遅いと結晶化が進行しシートの不透明化
や脆化の原因となる。First, the syndiotactic polystyrene resin described above is molded into a substantially amorphous sheet. As for the forming method, a sheet formed using a press or a T-die at a temperature higher than the melting point of the syndiotactic polystyrene resin is heated preferably at 150°C/min or higher using a cooling press or cooling roll. By rapidly cooling at a cooling rate, a substantially amorphous sheet can be obtained. At this time, if the cooling rate is slow, crystallization progresses, causing the sheet to become opaque and brittle.
次にこのようにして得られた、実質上無定形のシートを
、そのガラス転移温度以上、冷結晶化温度以下の温度範
囲において延伸する。Next, the substantially amorphous sheet thus obtained is stretched in a temperature range above its glass transition temperature and below its cold crystallization temperature.
前記のガラス転移温度や冷結晶化温度は、シンジオタッ
クチックポリスチレン系樹脂の種類やミクロタクテシテ
イによって異なるが、たとえばシンジオタクチシティが
９９％以上のポリスチレンにおいては、ガラス転移温度
は９３°Ｃ１冷結晶化温度は１４４°Ｃであり、融点は
２６８°Ｃであった。The glass transition temperature and cold crystallization temperature mentioned above vary depending on the type and microtacticity of the syndiotactic polystyrene resin, but for example, in polystyrene with syndiotacticity of 99% or more, the glass transition temperature is 93°C1. The cold crystallization temperature was 144°C and the melting point was 268°C.
延伸温度が前記温度範囲を逸脱すると所望の物性を有す
る延伸シートが得られず本発明の目的を達成することが
出来ない。If the stretching temperature is outside the above temperature range, a stretched sheet having desired physical properties cannot be obtained and the object of the present invention cannot be achieved.
また延伸方法については、例えば圧延装置や伸張延伸装
置などを用い、同時又は逐次二軸延伸などの方法を用い
ることができる。As for the stretching method, a method such as simultaneous or sequential biaxial stretching can be used, for example, using a rolling device, a stretching device, or the like.
さらに、この延伸シートを緊張下に、冷結晶化温度以上
、融点未満の温度において熱処理することが必要である
。この熱処理の時間は１０分ないし二時間程度で充分で
ある。このような熱処理を行わないと、充分に満足しう
る物性を有する熱処理シートが得られない。Furthermore, it is necessary to heat-treat the stretched sheet under tension at a temperature above the cold crystallization temperature and below the melting point. A time of about 10 minutes to two hours is sufficient for this heat treatment. If such heat treatment is not performed, a heat treated sheet having sufficiently satisfactory physical properties cannot be obtained.
この様にして得られた熱処理シートから成形体を得る方
法としては、熱板接触加熱式圧空成形法を採用すること
ができる。これは加熱された熱板に熱処理シートを接触
させて保持した状態で加熱し、所定温度に達した後、熱
処理シートを型内に圧空にて押し広げる様式の成形方法
である。成形条件としては、熱板の温度が樹脂の軟化温
度（ビカット軟化点）より３０ないし４５°Ｃの温度範
囲を選択し、加熱時間は４〜８秒を選択することができ
る。As a method for obtaining a molded article from the heat-treated sheet thus obtained, a hot plate contact heating type pressure forming method can be adopted. This is a molding method in which a heat-treated sheet is heated while being held in contact with a heated hot plate, and after reaching a predetermined temperature, the heat-treated sheet is expanded into a mold using compressed air. As the molding conditions, the temperature of the hot plate can be selected in a temperature range of 30 to 45°C higher than the softening temperature (Vicat softening point) of the resin, and the heating time can be selected to be 4 to 8 seconds.
この成形体は１２０°Ｃの乾熱オーブン中で５分間加熱
した時の成形体の寸法変化率が５％未満であることを特
徴とするものである。This molded product is characterized by a dimensional change rate of less than 5% when heated for 5 minutes in a dry heat oven at 120°C.
食品包装容器としてこの成形体を用いる場合には、蒸気
滅菌条件で評価した場合には寸法変化、白化、外観の変
化のないことが必要であり、本発明の成形体はこの分野
で特に有用である。When using this molded product as a food packaging container, it is necessary that there be no dimensional change, whitening, or change in appearance when evaluated under steam sterilization conditions, and the molded product of the present invention is particularly useful in this field. be.
以下、実施例を用いて本発明を具体的に説明する。Hereinafter, the present invention will be specifically explained using Examples.
（実施例） １、全光線透過率の測定法 ＡＳＴＭ−０１００３に準じて測定した。(Example) 1.Measurement method of total light transmittance Measured according to ASTM-01003.
２、密度の測定法（ＪＩＳＫ７１１２−Ｃ法）２５°Ｃ
において、水−エタノール−二塩化亜鉛の混合溶媒を用
いて浮沈法で測定を行なった。2. Density measurement method (JISK7112-C method) 25°C
Measurements were carried out by the float-sink method using a mixed solvent of water, ethanol, and zinc dichloride.
実施例１
（１） シンジオタックチックポリスチレンの製造不
活性ガスで置換した内容積１５００ｍｆｆｉのステンレ
ス製オートクレーブに、トルエン６００ ｍｌメチルア
ルミノキサン（東洋ストファー製） １２０１′ｄとテ
トラエトキシチタン０．６ ｍｍｏｌを加え、次いでス
チレン６００ ｍｌを加え５０°Ｃ二時間重合反応を行
った。反応終了後、塩酸、メタノールにより反応を停止
し、生成ポリマーをろ別後、乾燥した。この結果得られ
たポリスチレン９２ｇであった。Example 1 (1) Production of syndiotactic polystyrene 600 ml of toluene, methylaluminoxane (manufactured by Toyo Stoffer) 1201'd, and 0.6 mmol of tetraethoxytitanium were placed in a stainless steel autoclave with an internal volume of 1500 mffi and purged with inert gas. Then, 600 ml of styrene was added and a polymerization reaction was carried out at 50°C for two hours. After the reaction was completed, the reaction was stopped with hydrochloric acid and methanol, and the resulting polymer was filtered off and dried. The resulting polystyrene was 92 g.
このポリスチレンのメチルエチルケトン不溶部の含有率
は９６％であって、この不溶部の立体規則性は１３ＣＮ
ＭＲスペクトル解析の結果、９９％以上シンジオタック
チック構造であった。またこのシンジオタックチックポ
リスチレンのゲルパーミネーショーンクロマトグラフイ
−（１，２，４トリクロルベンゼン中、１３０°Ｃで測
定）により測定される重量平均分子量は４８．７Ｘ１０
’であり、示差走査熱量計を用いて測定した融点は２５
６°Ｃ５および２６６ ”Ｃであった。The content of the methyl ethyl ketone insoluble part in this polystyrene is 96%, and the stereoregularity of this insoluble part is 13CN
As a result of MR spectrum analysis, it was found that 99% or more had a syndiotactic structure. Furthermore, the weight average molecular weight of this syndiotactic polystyrene measured by gel permeation chromatography (measured at 130°C in 1,2,4 trichlorobenzene) is 48.7×10
', and the melting point measured using a differential scanning calorimeter is 25
6°C5 and 266''C.
（２） シンジオタックチックポリスチレンニ軸延伸
シートの製造
前記のシンジオタックチックポリスチレンを、３１０°
Ｃのプレスで溶融、成形後、冷却プレスを用いて、室温
まで象、冷し、透明な密度１．０５ｇ／ｃｍ３の実質上
無定形のシートを得た。(2) Production of syndiotactic polystyrene biaxially stretched sheet The syndiotactic polystyrene was
After melting and molding in a press of C, the mixture was cooled to room temperature using a cooling press to obtain a transparent substantially amorphous sheet having a density of 1.05 g/cm 3 .
この実質上無定形のシートを示差走査熱量計を用いて熱
量分析を行ったところ、ガラス転移温度は９３°Ｃ１冷
結晶化温度は１４４°Ｃ１融点は２６８°Ｃであった。When this substantially amorphous sheet was subjected to calorimetric analysis using a differential scanning calorimeter, the glass transition temperature was 93°C, the cold crystallization temperature was 144°C, and the melting point was 268°C.
このシートをシートストレッチャにより１１０°Ｃで延
伸倍率３． ＯＸ ３． Ｏの同時二軸延伸を行い、更
に延伸後、シートストレッチャにセットしたまま１６０
°Ｃで３０分間熱処理した。This sheet was stretched with a sheet stretcher at 110°C at a stretching ratio of 3. OX 3. Simultaneous biaxial stretching of
Heat treated at °C for 30 minutes.
得られたシートは密度１．１０ ｇ ７ｃｍ”全光線透
過率が９２．５％の透明性を有するものであった。The obtained sheet had a density of 1.10 g, 7 cm'' and transparency with a total light transmittance of 92.5%.
（３）開口部１７０Ｘ１１０ｍｍ、底部１５０ｍｍＸ９
０肛、深さ４０ｍｍの角トレーの製造■成形機；藤田鉄
工■製 熱板加熱接触式圧空成形機
■成形条件；熱板表面温度 １８０°Ｃ加熱時間 ６秒
、形成時間 ３秒
形成圧力 ３．０ｋｇ／ｃｍ’
上記、二輪延伸シートをもちい、■９■の成形条件で成
形し、角型トレーを得た。(3) Opening 170 x 110 mm, bottom 150 mm x 9
Manufacturing of square trays with 0 holes and depth of 40 mm ■Forming machine: Hot plate heating contact type air pressure forming machine manufactured by Fujita Iron Works ■Forming conditions: Hot plate surface temperature 180°C Heating time 6 seconds, Forming time 3 seconds Forming pressure 3 .0 kg/cm' Using the two-wheel stretched sheet described above, molding was performed under the molding conditions of ■9■ to obtain a square tray.
この成形体の全光線透過率は９１％、密度は１、１１
ｇ ７ｃｍ３であった。The total light transmittance of this molded body is 91%, and the density is 1.11
g 7cm3.
この成形体を１２０°Ｃの乾燥オーブン中で５分間加熱
した時の成形体深さの寸法変化率を測定したところ、寸
法変化率０．５６％であった。When this molded body was heated in a drying oven at 120° C. for 5 minutes, the dimensional change rate of the depth of the molded body was measured, and the dimensional change rate was 0.56%.
（発明の効果）
本発明によれば、耐熱性があり、沸騰水に直接接触する
用途、電子レンジによる加熱調理用途に使用しえる成形
体を提供するものである。(Effects of the Invention) According to the present invention, there is provided a molded article that is heat resistant and can be used for applications in which it comes into direct contact with boiling water and for cooking in a microwave oven.
特許出願人 旭化成工業株式会社Patent applicant: Asahi Kasei Industries, Ltd.
Claims (1)
を成形してなる成形体であつて ［１］該シンジオタツクチツクポリスチレン系樹脂が式 ▲数式、化学式、表等があります▼で示される繰り返し
単位を有し、 （式中、Ｒは水素原子、ハロゲン原子、あるいは炭素、
酸素、窒素、リンまたは珪素原子を含む置換基を示し、
ｎは１〜３の整数を示す。） ［２］該成形体の全光線透過率が９０％以上の透明性を
有し、該成形体の２５℃における密度が１．００〜１．
１５であり、且つ１２０℃の乾熱オーブン中で５分間加
熱した時の該成形体の寸法変化率が５％未満であること
を特徴とする、シンジオタツクチツクポリスチレン系樹
脂シートを成形してなる成形体(1) A molded article formed by molding a syndiotactic polystyrene resin sheet, [1] The syndiotactic polystyrene resin has a repeating unit represented by the formula ▲There are mathematical formulas, chemical formulas, tables, etc.▼ (wherein R is a hydrogen atom, a halogen atom, or carbon,
indicates a substituent containing oxygen, nitrogen, phosphorus or silicon atoms,
n represents an integer of 1 to 3. ) [2] The molded product has transparency with a total light transmittance of 90% or more, and the density of the molded product at 25°C is 1.00 to 1.
15, and the dimensional change rate of the molded product is less than 5% when heated for 5 minutes in a dry heat oven at 120 ° C. molded body
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP19070188A JP2628891B2 (en) | 1988-08-01 | 1988-08-01 | Molded article of biaxially stretched styrene resin sheet |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP19070188A JP2628891B2 (en) | 1988-08-01 | 1988-08-01 | Molded article of biaxially stretched styrene resin sheet |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPH0241225A true JPH0241225A (en) | 1990-02-09 |
| JP2628891B2 JP2628891B2 (en) | 1997-07-09 |
Family
ID=16262413
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP19070188A Expired - Lifetime JP2628891B2 (en) | 1988-08-01 | 1988-08-01 | Molded article of biaxially stretched styrene resin sheet |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JP2628891B2 (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| EP0563812A2 (en) * | 1992-03-30 | 1993-10-06 | Idemitsu Kosan Company Limited | Styrenic resin laminate and molding thereof |
-
1988
- 1988-08-01 JP JP19070188A patent/JP2628891B2/en not_active Expired - Lifetime
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| EP0563812A2 (en) * | 1992-03-30 | 1993-10-06 | Idemitsu Kosan Company Limited | Styrenic resin laminate and molding thereof |
| EP0563812A3 (en) * | 1992-03-30 | 1994-01-26 | Idemitsu Kosan Co |
Also Published As
| Publication number | Publication date |
|---|---|
| JP2628891B2 (en) | 1997-07-09 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| AU605811B2 (en) | Process for producing crystalline vinyl aromatic polymers having mainly a sydiotactic structure | |
| JPH01110122A (en) | Production of syndiotactic polystyrenic film | |
| TW397841B (en) | Styrenic polymer and molded article | |
| JPH04502635A (en) | Thermoformable polyaryletherketone sheet | |
| ES2092982T3 (en) | MOLDED STRETCHED ARTICLES OF STYRENE RESIN AND PROCEDURE FOR ITS MANUFACTURE. | |
| JP2888856B2 (en) | Syndiotactic polystyrene transparent film | |
| JP2748935B2 (en) | Syndiotactic polystyrene film | |
| JPH02252706A (en) | Production of styrene polymer | |
| JP2790636B2 (en) | Stretched film for food packaging | |
| JPH0241225A (en) | Molded form of styrene resin biaxial orientation sheet | |
| JP2911501B2 (en) | Method for producing styrenic polymer | |
| JP2742099B2 (en) | Smoothness film | |
| JPH01182348A (en) | Molded product of styrene based polymer and production thereof | |
| JP4926335B2 (en) | Chemically resistant polystyrene resin composition and molded article with excellent transparency | |
| JPH03114728A (en) | Manufacture of rolled article | |
| JPS6218339B2 (en) | ||
| JPS6398431A (en) | Molding method of styrene series polymer | |
| JP2000313754A (en) | Shrink film | |
| JPH01201350A (en) | Production of styrene resin composition and its molding | |
| JPH0255122A (en) | Biaxially oriented heat-resistant styrenic resin sheet | |
| JPS61148237A (en) | Molded polyester article and production thereof | |
| JPH01182347A (en) | Production of styrene based resin composition and molded product thereof | |
| JP2820964B2 (en) | Purification method of styrenic polymer | |
| Lodefier et al. | Sequences distribution of poly (ethylene terephthalate‐isophthalate) copolymers: Experimental TREF study and numerical simulation | |
| JP3590632B2 (en) | Purification method of styrenic polymer |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| FPAY | Renewal fee payment (event date is renewal date of database) |
Free format text: PAYMENT UNTIL: 20080418 Year of fee payment: 11 |
|
| FPAY | Renewal fee payment (event date is renewal date of database) |
Free format text: PAYMENT UNTIL: 20090418 Year of fee payment: 12 |
|
| EXPY | Cancellation because of completion of term | ||
| FPAY | Renewal fee payment (event date is renewal date of database) |
Free format text: PAYMENT UNTIL: 20090418 Year of fee payment: 12 |