JPH0531799A - Manufacture of transparent heat resistant container - Google Patents
Manufacture of transparent heat resistant containerInfo
- Publication number
- JPH0531799A JPH0531799A JP21281491A JP21281491A JPH0531799A JP H0531799 A JPH0531799 A JP H0531799A JP 21281491 A JP21281491 A JP 21281491A JP 21281491 A JP21281491 A JP 21281491A JP H0531799 A JPH0531799 A JP H0531799A
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- Japan
- Prior art keywords
- temperature
- resin
- weight
- parts
- resin composition
- 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.)
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- Compositions Of Macromolecular Compounds (AREA)
- Processing And Handling Of Plastics And Other Materials For Molding In General (AREA)
- 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
【０００１】[0001]
【産業上の利用分野】本発明は透明耐熱容器の製造方
法、特には電子レンジなどに用いられる透明な耐熱プラ
スチック容器や加熱殺菌、ホットフィルが可能な透明容
器の製造方法に関するものである。BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a method for producing a transparent heat-resistant container, and more particularly to a method for producing a transparent heat-resistant plastic container used in a microwave oven or the like and a transparent container capable of heat sterilization and hot filling.
【０００２】[0002]
【従来の技術】従来、電子レンジに用いられるワンウェ
イタイプのプラスチック容器の素材としては、フィラ−
入りのポリプロピレン（ＰＰ）、および結晶化させたポ
リエチレンテレフタレ−ト（クリスタライズド−ＰＥ
Ｔ）が広く用いられているがこれらの樹脂は不透明のも
のが多く、透明容器の素材としては非結晶のポリエチレ
ンテレフタレ−ト（アモルファス−ＰＥＴ）、ポリ塩化
ビニル（ＰＶＣ）などの樹脂が知られているが、これら
には耐熱性に欠けるという不利がある。2. Description of the Related Art Conventionally, fillers have been used as materials for one-way type plastic containers used in microwave ovens.
Filled polypropylene (PP) and crystallized polyethylene terephthalate (Crystalized-PE
Although T) is widely used, most of these resins are opaque, and as a material for transparent containers, amorphous polyethylene terephthalate (amorphous-PET), polyvinyl chloride (PVC), and other resins are known. However, these have the disadvantage of lacking heat resistance.
【０００３】また、透性で耐熱性を有するプラスチック
素材としては、例えばポリアリレ−ト（ＰＡＲ）、ポリ
カ−ボネ−ト（ＰＣ）、ポリメチルペンテン（ＴＰＸ）
などが知られているが、これらの樹脂からなる容器は通
常インジェクション成形によって製造されるために、他
の成形法による場合に比べて金型の製作が難しく、コス
トも高いという不利があるために、販売ロットの小さい
ワンウエイタイプの容器の製造には適当でないという問
題点がある。Examples of the transparent and heat-resistant plastic material include polyarylate (PAR), polycarbonate (PC) and polymethylpentene (TPX).
However, since containers made of these resins are usually manufactured by injection molding, it is difficult to manufacture a mold and costs are high compared to other molding methods. However, there is a problem that it is not suitable for manufacturing a one-way type container with a small sales lot.
【０００４】そのため、このような用途には真空成形
法、圧空成形法、真空圧空成形法またはプレス成形法に
よる方法が検討されており、この成形に使用されるプラ
スチック材料の中では特にポリブチレンテレフタレ−ト
（以下ＰＢＴと略記する。）系樹脂が耐熱性に優れ、他
のエンジニアリングプラスチックに比べ価格も比較的安
価であり、これはまたさらに価格の安いポリエチレンテ
レフタレ−ト（以下ＰＥＴと略記する）系樹脂との相溶
性もよいことから、これらを配合した混合樹脂組成物が
耐熱包装材料用として好ましいものとして、本発明者ら
はＰＢＴ系樹脂とＰＥＴ系樹脂とからなる樹脂組成物を
素材とし、これを加熱調整された金型内で加熱成形する
方法を提案している（特願平２-173859 号明細書参
照）。Therefore, a vacuum molding method, a pressure molding method, a vacuum pressure molding method or a press molding method has been investigated for such applications, and among the plastic materials used for this molding, polybutylene terephthalate is particularly preferable. Tartrate (hereinafter abbreviated as PBT) -based resin has excellent heat resistance and is relatively inexpensive compared to other engineering plastics, which is a cheaper polyethylene terephthalate (hereinafter abbreviated as PET). The mixed resin composition containing them is preferable as a heat-resistant packaging material because they have good compatibility with the above-mentioned resins. Therefore, the present inventors have proposed a resin composition comprising a PBT-based resin and a PET-based resin. As a raw material, a method has been proposed in which the material is heat-molded in a heat-controlled die (see Japanese Patent Application No. 2-173859).
【０００５】[0005]
【発明が解決しようとする課題】しかして、この方法だ
けでは厚物の加熱成形前のシ−トを得るために混合物の
ＰＥＴの割合を多くすると、加熱成形後に透明性が失な
われるという問題があることから、本発明者らは徐冷に
よりシ−トを製造するか、加熱成形前のシ−トをアニ−
ルする方法を提案した（特願平3-96243 号明細書参照）
が、これには徐冷、アニ−ルが必要とされるし、この徐
冷にはアニ−ルほど効果がなく、アニ−ルにはコストア
ップとなり、品質不安定要因になるという問題点があ
る。However, with this method alone, if the proportion of PET in the mixture is increased in order to obtain a sheet prior to thermoforming of a thick product, the transparency will be lost after thermoforming. Therefore, the present inventors have manufactured the sheet by slow cooling or annealed the sheet before heat molding.
Proposed a method to do this (see Japanese Patent Application No. 3-96243)
However, this requires slow cooling and anneal, and this slow cooling is not as effective as anneal, and the cost of anneal increases, which is a factor of unstable quality. is there.
【０００６】[0006]
【課題を解決するための手段】本発明はこのような不利
を解決した透明耐熱性容器の製造方法に関するものであ
り、これは少なくとも１種のポリブチレンテレフタレ−
ト系樹脂１〜100 重量部と少なくとも１種のポリエチレ
ンテレフタレ−ト系樹脂99〜０重量部とよりなる樹脂組
成物100 重量部（ただしポリブチレンテレフタレ−ト単
独重合体100 重量部を除く）を透明シ−トに成膜し、得
られた透明シ−トをガラス転移点以上で冷結晶化温度よ
りも低い温度に予備加熱したのち、30℃以上100 ℃以下
に温度調整されたプラグを用いてシ−トの成形部分を20
％以上延伸し、ついで冷結晶化温度以上で、かつ使用さ
れる樹脂のうち融点の低い方の樹脂の融点よりも低い温
度に加熱調整された金型内で容器成形することを特徴と
するものである。SUMMARY OF THE INVENTION The present invention relates to a method for producing a transparent heat-resistant container which has solved such disadvantages, which is at least one polybutylene terephthalate.
100 parts by weight of a resin composition consisting of 1 to 100 parts by weight of a resin and 99 to 0 parts by weight of a polyethylene terephthalate resin (excluding 100 parts by weight of a polybutylene terephthalate homopolymer). ) On a transparent sheet, and the obtained transparent sheet is preheated to a temperature lower than the cold crystallization temperature above the glass transition point, and then the temperature is adjusted to 30 ° C or higher and 100 ° C or lower. 20 to the molded part of the sheet
% Or more, and then molded into a container in a mold whose temperature is adjusted to a temperature higher than the cold crystallization temperature and which is lower than the melting point of the resin having a lower melting point. Is.
【０００７】すなわち、本発明者らは透明性にすぐれて
おり、かつ耐熱性もすぐれている容器の製造方法につい
て種々検討した結果、ＰＢＴ系樹脂１〜100重量部とＰ
ＥＴ系樹脂99〜０重量部から構成される樹脂組成物を成
膜し、この膜状物を樹脂組成物のガラス転移点以上で冷
結晶化温度より低い温度に予備加熱してから、30℃〜10
0 ℃に温度調整されたプラグでシ−トの成形部分を20％
以上延伸してから、所定温度に加熱した金型内で容器成
形すると、透明で耐熱性のよい容器を得ることができる
ことを見出し、このときの予熱温度、プラグ、金型の加
熱温度などについての検討を進めて本発明を完成させ
た。以下にこれをさらに詳述する。That is, the present inventors have conducted various studies on a method for producing a container having excellent transparency and heat resistance, and as a result, 1 to 100 parts by weight of PBT resin and P
A resin composition composed of 99 to 0 parts by weight of the ET resin is formed into a film, and the film-like material is preheated to a temperature not lower than the glass transition point of the resin composition and lower than the cold crystallization temperature. ~Ten
20% of the molded part of the sheet with a plug whose temperature is adjusted to 0 ° C
It was found that a transparent and heat-resistant container can be obtained by forming the container in a mold heated to a predetermined temperature after stretching as described above, and regarding the preheating temperature at this time, the plug, the heating temperature of the mold, etc. The present invention was completed by proceeding with the examination. This will be described in more detail below.
【０００８】[0008]
【作用】本発明は透明耐熱容器の製造方法に関するもの
であり、これはＰＢＴ系樹脂とＰＥＴ系樹脂とからなる
樹脂組成物（ＰＢＴ単独重合体のみを除く）を成膜し、
これを樹脂組成物のガラス転移点以上で、かつ冷結晶温
度より低い温度に予備加熱し、プラグでシ−トの成形部
分を20％以上延伸し、加熱調整された金型内で容器成形
するものである。The present invention relates to a method for producing a transparent heat-resistant container, which comprises forming a resin composition (excluding only PBT homopolymer) of a PBT resin and a PET resin into a film,
This is preheated to a temperature not lower than the glass transition point of the resin composition and lower than the cold crystallization temperature, the molded portion of the sheet is stretched by 20% or more with a plug, and molded into a container in a heat-controlled mold. It is a thing.
【０００９】本発明において用られる樹脂組成物は少な
くとも１種のＰＢＴ樹脂１〜１００重量部と少なくとも
１種のＰＥＴ樹脂９９〜０重量部とからなる合計が１０
０重量部（ただしＰＢＴ単独重合体のみで１００重量部
の場合を除く）のものであり、より具体的には（ａ）１
種のＰＢＴ樹脂１〜９９重量部と１種のＰＥＴ樹脂９９
〜１重量部とからなる合計の樹脂量が１００重量部、ま
たは（ｂ）１種のＰＢＴ樹脂０〜９９重量部とこれより
も結晶化速度の遅い１種のＰＢＴ樹脂１００〜１重量部
とからなる合計の樹脂量が１００重量部、または（ｃ）
ＰＢＴ樹脂とＰＥＴ樹脂から３種類以上を選び、全体と
してＰＢＴ系樹脂１〜１００重量部とＰＥＴ樹脂９９〜
０重量部とからなる合計の樹脂量が１００重量部からな
るものであり、これらのうち少なくとも１つは結晶性の
樹脂である。The resin composition used in the present invention comprises 1 to 100 parts by weight of at least one PBT resin and 99 to 0 parts by weight of at least one PET resin, for a total of 10 parts.
0 parts by weight (excluding the case where only 100 parts by weight of PBT homopolymer is used), and more specifically (a) 1
1 to 99 parts by weight of one kind of PBT resin and one kind of PET resin 99
To 100 parts by weight, or (b) 0 to 99 parts by weight of one PBT resin and 100 to 1 parts by weight of one PBT resin having a slower crystallization rate. The total amount of resin consisting of 100 parts by weight, or (c)
Three or more types are selected from PBT resin and PET resin, and PBT resin 1 to 100 parts by weight and PET resin 99 to
The total amount of the resin, which is 0 part by weight, is 100 parts by weight, and at least one of them is a crystalline resin.
【００１０】本発明において使用される上記した樹脂組
成物はシ−トに成形され、ついで容器成形されるのであ
るが、これはシ−トを予備加熱後プラグを用いて延伸し
たのち、真空成形機、圧送成形機、真空圧空成形機、プ
レス成形機において容器に成形される。この予備加熱は
この加熱温度が樹脂組成物のガラス転移点より低いとシ
−トが軟化し切らないために伸ばすことができず、また
冷却化温度以上とするとシ−トが結晶化してしまってや
はり伸ばすことができなくなるので、樹脂組成物のガラ
ス転移点以上で冷結晶温度より低い温度の範囲とする必
要がある。The above-mentioned resin composition used in the present invention is molded into a sheet and then into a container. The sheet is preheated, stretched with a plug and then vacuum-molded. A container, a molding machine, a pressure molding machine, a vacuum pressure molding machine, and a press molding machine. If the heating temperature is lower than the glass transition point of the resin composition, the sheet cannot be stretched because the sheet is not softened completely, and if the heating temperature is higher than the cooling temperature, the sheet is crystallized. Since the film cannot be stretched again, it is necessary to set the temperature in the range above the glass transition point of the resin composition and below the cold crystallization temperature.
【００１１】また、この予備加熱されたシ−トはついで
プラグにより引伸ばされるのであるが、このプラグにつ
いてはそれが30℃より低い温度であるとプラグとの接触
部分が冷されてその部分が伸びなくなり、また100 ℃よ
り高い温度とするとプラグとの接触部分が冷結晶化温度
まで加熱されて結晶化してその部分が伸びなくなるか、
あるいは透明性を失なってしまうので、これは30℃以上
100 ℃以下とすることがよい。このように温度調整され
たプラグによってシ−トは20％以上延伸され、この延伸
部分はつぎの加熱金型内での成形時にも透明性を維持す
ることができるのであるが、この延伸は100 ％より大き
くすると延伸時に破れやすくなるので注意を要する。The preheated sheet is then stretched by a plug. When the temperature of the plug is lower than 30 ° C., the contact portion with the plug is cooled and the sheet is cooled. If the temperature does not elongate and the temperature is higher than 100 ° C, the contact part with the plug will be heated to the cold crystallization temperature and crystallize and the part will not elongate.
Or since it loses transparency, this is over 30 ℃
It is better to keep the temperature below 100 ° C. By the temperature-controlled plug, the sheet is stretched by 20% or more, and the stretched portion can maintain transparency even during the subsequent molding in the heating mold, but this stretching is 100%. If it is larger, it will be easily broken during stretching, so care must be taken.
【００１２】この延伸されたシ−トはついで加熱金型内
で容器に成形されるのであるが、この金型の温度は樹脂
組成物の冷結晶化温度より低いと成形が難しく、金型内
での結晶化も進みにくくなり、これをここに使用する樹
脂組成物を構成する樹脂のうちの融点の低い樹脂の融点
よりも高い温度とするとシ−トが融解してしまうので、
これは樹脂組成物の冷結晶化温度以上で、使用される樹
脂のうち融点の低い樹脂の融点より低い温度に加熱調整
することが必要とされ、これによれば目的とする容器を
透明で耐熱性の高いものとして得ることができる。This stretched sheet is then molded into a container in a heating mold. If the temperature of this mold is lower than the cold crystallization temperature of the resin composition, molding will be difficult and the inside of the mold will be difficult. It also becomes difficult to proceed with crystallization, and if the temperature is higher than the melting point of the resin having a low melting point among the resins constituting the resin composition used here, the sheet will melt,
This requires that the temperature is adjusted to a temperature lower than the cold crystallization temperature of the resin composition and lower than the melting point of the resin having a low melting point, which makes the target container transparent and heat-resistant. It can be obtained as a highly productive product.
【００１３】[0013]
【実施例】つぎに本発明の実施例、比較例をあげる。
実施例１、比較例１〜２
ＰＢＴ樹脂、ジュラネックス600 ＦＰ［ポリプラスチッ
ク（株）製商品名］のペレット60重量部と、ＰＥＴ樹脂
・ＦＦＳ−30Ｍ[ 鐘紡（株）製商品名］のペレット40重
量部とを押出機に供給し、再びペレット化したものを直
径50mmφの押出機に供給し、650mm 幅のＴダイを取りつ
けて厚さ0.8mm のシ−トを成膜した。EXAMPLES Next, examples and comparative examples of the present invention will be described. Example 1, Comparative Examples 1-2 PBT resin, 60 parts by weight of Duranex 600 FP [trade name of Polyplastics Co., Ltd.] pellets, and PET resin FFS-30M [trade name of Kanebo Co., Ltd.] pellets 40 parts by weight was fed to the extruder, and the pelletized product was fed to an extruder having a diameter of 50 mmφ, and a T die having a width of 650 mm was attached to form a sheet having a thickness of 0.8 mm.
【００１４】ついでこのシ−トを60℃に予備加熱したの
ち、これを30℃、60℃、100 ℃に温度調整したプラグを
用いて成形部分を20％延伸し、これを金型温度160 ℃で
真空成形し、得られた容器についての成形性、透明性、
耐熱性をしらべたところ、表１に示したとおりの結果が
得られたが、比較のためにこのプラグの温度を20℃、11
0 ℃としたほかは上記と同様に処理して容器を作ったと
ころ、このものの成形性、透明性、耐熱性については表
１に併記したとおりの結果が得られた。Then, this sheet was preheated to 60 ° C., and the molded portion was stretched by 20% using a plug whose temperature was adjusted to 30 ° C., 60 ° C. and 100 ° C., and the mold temperature was 160 ° C. Vacuum molding with moldability, transparency of the resulting container,
When the heat resistance was examined, the results shown in Table 1 were obtained. For comparison, the temperature of this plug was set to 20 ° C and 11 ° C.
When a container was prepared by treating in the same manner as above except that the temperature was 0 ° C., the results as shown in Table 1 were obtained regarding the moldability, transparency and heat resistance of this container.
【００１５】[0015]
【表１】 [Table 1]
【００１６】実施例２、比較例３〜４
ＰＢＴ樹脂、ジュラネックス600 ＦＰ（前出)70 重量部
とＰＥＴ樹脂・ＦＦＳ30Ｍ（前出)30 重量部とを配合し
た混合樹脂Ａと上記したＰＢＴ樹脂40重量部と上記した
ＰＥＴ樹脂60重量部とを配合した混合樹脂Ｂとを、50mm
φまたは30mmφの押出機に250mm φの２種３層マルチマ
ニホ−ルドダイを取りつけたものに供給し、共押出しし
てＡとＢの厚さの割合がＡ／Ｂ／Ａ＝１／４／１である
厚さ1.5mm のシ−トに成膜した。Example 2, Comparative Examples 3 to 4 PBT resin, Duranex 600 FP (previously mentioned) 70 parts by weight and PET resin / FFS30M (previously mentioned) 30 parts by weight mixed resin A and the above-mentioned PBT resin A mixed resin B containing 40 parts by weight and 60 parts by weight of the PET resin described above is mixed with 50 mm.
It is supplied to a φ or 30 mm φ extruder equipped with a 250 mm φ 2-type 3-layer multi-manifold die, and coextruded so that the thickness ratio of A and B is A / B / A = 1/4/1. The film was formed on a sheet having a thickness of 1.5 mm.
【００１７】ついでこのシ−トを60℃に予備加熱し、60
℃に温度調整されたプラグにより成形部分を20％延伸さ
せたのち、160 ℃に温度調整された直径100mm、深さ100m
m の雌形の金型で真空成形して容器を成形し、その透明
性と耐熱性をしらべたところ、表２に示したとおりの結
果が得られた。しかし、比較のためにこのプラグによる
延伸を５〜15％としたのち、直径100mm、深さ50mmの雌形
の金型で真空成形した容器、および上記においてプラグ
を使用せず、したがって延伸せずに160 ℃に加熱された
直径100mm、深さ20mmの雌形の金型で真空成形して得た容
器についての透明性、耐熱性をしらべたところ、このも
のは表２に併記したとおりの結果を示した。The sheet is then preheated to 60 ° C.
The molded part is stretched by 20% with a plug whose temperature is adjusted to ℃, then the temperature is adjusted to 160 ℃ and the diameter is 100 mm and the depth is 100 m.
When the container was molded by vacuum molding with a female mold of m 2, and its transparency and heat resistance were examined, the results shown in Table 2 were obtained. However, for the purpose of comparison, after the drawing by this plug was set to 5 to 15%, the container was vacuum-formed with a female mold having a diameter of 100 mm and a depth of 50 mm, and the plug was not used in the above, and therefore the drawing was not performed We examined the transparency and heat resistance of a container obtained by vacuum forming with a female mold of 100 mm in diameter and 20 mm in depth heated to 160 ℃. The results are shown in Table 2 together. showed that.
【００１８】[0018]
【表２】 [Table 2]
【００１９】[0019]
【発明の効果】本発明は透明耐熱容器の製造方法に関す
るものであり、これは前記したように少なくとも１種の
ＰＢＴ系樹脂１〜100 重量部と少なくとも１種のＰＥＴ
系樹脂99〜０重量部よりなる樹脂組成物を透明シ−トに
成膜し、これを樹脂組成物のガラス転移点以上で冷結晶
化温度よりも低い温度に予備加熱したのち、30℃以上 1
00℃以下に温度調整されたプラグにより成形部分を20％
以上延伸させ、ついで冷結晶化温度以上で、かつ使用す
る樹脂のうち融点の低い方の樹脂の融点よりも低い温度
に加熱調整された金型内で容器成形することを特徴とす
るものであるが、これによればコストアップ、品質不安
定の要因となるアニ−ルなどの方法によることなく、比
較例厚手でも透明で、しかも耐熱性のすぐれた容器を容
易に、かつ安価に製造することができるという有利性が
与えられる。The present invention relates to a method for producing a transparent heat-resistant container, which comprises 1 to 100 parts by weight of at least one PBT resin and at least one PET as described above.
A resin composition comprising 99 to 0 parts by weight of a base resin is formed into a film on a transparent sheet, and the film is preheated at a temperature not lower than the glass transition point of the resin composition and lower than the cold crystallization temperature, and then 30 ° C or higher. 1
20% of the molded part with a plug whose temperature is adjusted to below 00 ℃
It is characterized in that it is stretched as described above, and then molded in a mold that is heated and adjusted to a temperature not lower than the cold crystallization temperature and lower than the melting point of the resin having a lower melting point among the resins used. However, according to this method, it is possible to easily and inexpensively manufacture a container which is transparent even in the comparative example thick and excellent in heat resistance, without using a method such as anneal which causes cost increase and quality instability. The advantage of being able to
───────────────────────────────────────────────────── フロントページの続き (51)Int.Cl.5 識別記号 庁内整理番号 ＦＩ 技術表示箇所 Ｃ０８Ｌ 67/00 ＬＰＤ 8933−4Ｊ // Ｂ２９Ｋ 67:00 Ｂ２９Ｌ 22:00 4Ｆ ─────────────────────────────────────────────────── ─── Continuation of front page (51) Int.Cl. 5 Identification code Office reference number FI technical display location C08L 67/00 LPD 8933-4J // B29K 67:00 B29L 22:00 4F
Claims (3)
−ト系樹脂１〜100重量部と少なくとも１種のポリエチ
レンテレフタレ−ト系樹脂99〜０重量部とよりなる樹脂
組成物100 重量部（ただしポリブチレンテレフタレ−ト
単独重合体100 重量部を除く）を透明シ−トに成膜し、
得られた透明シ−トを樹脂組成物のガラス転移点以上で
冷結晶化温度よりも低い温度に予備加熱したのち、30℃
以上100 ℃以下に温度調整されたプラグを用いてシ−ト
の成形部分を20％以上延伸し、ついで冷結晶化温度以上
でかつ用いた樹脂のうち融点の低い方の樹脂の融点より
も低い温度に加熱調整された金型内で容器成形すること
を特徴とする透明耐熱容器の製造方法。1. A resin composition comprising 100 parts by weight of 1 to 100 parts by weight of at least one polybutylene terephthalate resin and 99 to 0 parts by weight of at least one polyethylene terephthalate resin (however, Polybutylene terephthalate homopolymer (excluding 100 parts by weight) is formed into a film on a transparent sheet,
The obtained transparent sheet is preheated to a temperature lower than the cold crystallization temperature above the glass transition point of the resin composition and then 30 ° C.
The molded part of the sheet is stretched by 20% or more using a plug whose temperature is adjusted to 100 ° C or lower, and then lower than the melting point of the resin having the lower melting point than the one used at the cold crystallization temperature or higher and used. A method for producing a transparent heat-resistant container, which comprises molding the container in a mold whose temperature has been adjusted.
−ト系樹脂１〜100重量部と少なくとも１種のポリエチ
レンテレフタレ−ト系樹脂99〜０重量部からなる樹脂組
成物合計 100重量部の中から少なくとも２種を選択し、
それぞれを急冷して成膜したのち積層した積層透明シ−
ト、またはこの選択された２種以上の組成物を共押出し
た直後に急冷して得られた積層透明シ−トを使用する樹
脂組成物のうちの最も高いガラス転移点以上、使用する
樹脂組成物のうちの最も低い冷結晶化温度よりも低い温
度に予備加熱したのち、30℃以上100 ℃以下に温度調整
されたプラグを用いてシ−トの成形部分を20％以上延伸
し、ついで使用する樹脂組成物のうちの最も高い冷結晶
化温度以上、使用する樹脂組成物のうち最も低い融点よ
りも低い温度に加熱調整された金型内で容器成形するこ
とを特徴とする透明耐熱容器の製造方法。2. A total of 100 parts by weight of a resin composition comprising 1 to 100 parts by weight of at least one polybutylene terephthalate resin and 99 to 0 parts by weight of at least one polyethylene terephthalate resin. Select at least 2 kinds from
Laminated transparent sheet that is formed by rapidly cooling and forming films
Or a resin composition to be used which has the highest glass transition point or higher among resin compositions using a laminated transparent sheet obtained by quenching immediately after coextruding two or more selected compositions. After preheating to a temperature lower than the lowest cold crystallization temperature of the products, the molded part of the sheet is stretched by 20% or more using a plug whose temperature is adjusted to 30 ° C or more and 100 ° C or less, and then used. Of the highest cold crystallization temperature of the resin composition to be above, the transparent heat-resistant container characterized in that it is molded in a mold heat adjusted to a temperature lower than the lowest melting point of the resin composition used. Production method.
ロ−ル、冷却ベルト、または水中で急冷して結晶化度の
低い透明な状態で固化させたのち、プラグを用いて延伸
させ、加熱成形する請求項１または２に記載した透明耐
熱容器の製造方法。3. A molten sheet obtained by extrusion molding of a resin is rapidly cooled in a cooling roll, a cooling belt, or water to be solidified in a transparent state with low crystallinity, and then stretched using a plug. The method for producing a transparent heat-resistant container according to claim 1 or 2, wherein the heat-resistant container is heat-molded.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP21281491A JPH0531799A (en) | 1991-07-30 | 1991-07-30 | Manufacture of transparent heat resistant container |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP21281491A JPH0531799A (en) | 1991-07-30 | 1991-07-30 | Manufacture of transparent heat resistant container |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JPH0531799A true JPH0531799A (en) | 1993-02-09 |
Family
ID=16628804
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP21281491A Pending JPH0531799A (en) | 1991-07-30 | 1991-07-30 | Manufacture of transparent heat resistant container |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPH0531799A (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2004048071A1 (en) * | 2002-11-26 | 2004-06-10 | Seiji Kagawa | Method for producing polybutylene terephthalate film |
| JP2006169430A (en) * | 2004-12-17 | 2006-06-29 | Sekisui Plastics Co Ltd | Thermoformed article and process for producing the same |
-
1991
- 1991-07-30 JP JP21281491A patent/JPH0531799A/en active Pending
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2004048071A1 (en) * | 2002-11-26 | 2004-06-10 | Seiji Kagawa | Method for producing polybutylene terephthalate film |
| JP2006169430A (en) * | 2004-12-17 | 2006-06-29 | Sekisui Plastics Co Ltd | Thermoformed article and process for producing the same |
| JP4619767B2 (en) * | 2004-12-17 | 2011-01-26 | 積水化成品工業株式会社 | Manufacturing method of thermoformed product |
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