JPH0463836A - Production of heat-resistant resin container - Google Patents
Production of heat-resistant resin containerInfo
- Publication number
- JPH0463836A JPH0463836A JP2173859A JP17385990A JPH0463836A JP H0463836 A JPH0463836 A JP H0463836A JP 2173859 A JP2173859 A JP 2173859A JP 17385990 A JP17385990 A JP 17385990A JP H0463836 A JPH0463836 A JP H0463836A
- Authority
- JP
- Japan
- Prior art keywords
- resin
- sheet
- molding
- terephthalate resin
- container
- 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
- 238000004519 manufacturing process Methods 0.000 title claims description 11
- 229920006015 heat resistant resin Polymers 0.000 title claims description 4
- 239000011347 resin Substances 0.000 claims abstract description 70
- 229920005989 resin Polymers 0.000 claims abstract description 70
- 229920000139 polyethylene terephthalate Polymers 0.000 claims abstract description 36
- 239000005020 polyethylene terephthalate Substances 0.000 claims abstract description 36
- 229920001707 polybutylene terephthalate Polymers 0.000 claims abstract description 35
- 238000000465 moulding Methods 0.000 claims abstract description 19
- -1 polybutylene Polymers 0.000 claims abstract description 18
- 238000010438 heat treatment Methods 0.000 claims abstract description 5
- 239000011342 resin composition Substances 0.000 claims abstract description 5
- 238000007666 vacuum forming Methods 0.000 claims abstract description 4
- 238000000071 blow moulding Methods 0.000 claims description 9
- 238000000034 method Methods 0.000 claims description 9
- 239000004033 plastic Substances 0.000 claims description 6
- 229920003023 plastic Polymers 0.000 claims description 6
- 238000001816 cooling Methods 0.000 claims description 3
- 238000003475 lamination Methods 0.000 claims 1
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims 1
- 229920001748 polybutylene Polymers 0.000 abstract 1
- 239000000463 material Substances 0.000 description 7
- 239000000203 mixture Substances 0.000 description 7
- 239000004743 Polypropylene Substances 0.000 description 5
- 238000002156 mixing Methods 0.000 description 5
- 229920001155 polypropylene Polymers 0.000 description 5
- 238000002425 crystallisation Methods 0.000 description 4
- 230000008025 crystallization Effects 0.000 description 4
- 230000004888 barrier function Effects 0.000 description 3
- 239000000945 filler Substances 0.000 description 3
- 239000002216 antistatic agent Substances 0.000 description 2
- 239000003795 chemical substances by application Substances 0.000 description 2
- 229920001577 copolymer Polymers 0.000 description 2
- 239000003205 fragrance Substances 0.000 description 2
- 239000003365 glass fiber Substances 0.000 description 2
- 229920001519 homopolymer Polymers 0.000 description 2
- 238000001746 injection moulding Methods 0.000 description 2
- 229920001230 polyarylate Polymers 0.000 description 2
- 239000000126 substance Substances 0.000 description 2
- 239000004094 surface-active agent Substances 0.000 description 2
- YLZOPXRUQYQQID-UHFFFAOYSA-N 3-(2,4,6,7-tetrahydrotriazolo[4,5-c]pyridin-5-yl)-1-[4-[2-[[3-(trifluoromethoxy)phenyl]methylamino]pyrimidin-5-yl]piperazin-1-yl]propan-1-one Chemical compound N1N=NC=2CN(CCC=21)CCC(=O)N1CCN(CC1)C=1C=NC(=NC=1)NCC1=CC(=CC=C1)OC(F)(F)F YLZOPXRUQYQQID-UHFFFAOYSA-N 0.000 description 1
- 229920000219 Ethylene vinyl alcohol Polymers 0.000 description 1
- 239000004677 Nylon Substances 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 238000010828 elution Methods 0.000 description 1
- 229920006351 engineering plastic Polymers 0.000 description 1
- 235000015203 fruit juice Nutrition 0.000 description 1
- 235000011389 fruit/vegetable juice Nutrition 0.000 description 1
- 230000004927 fusion Effects 0.000 description 1
- 239000012535 impurity Substances 0.000 description 1
- 238000010030 laminating Methods 0.000 description 1
- 230000014759 maintenance of location Effects 0.000 description 1
- 239000002184 metal Substances 0.000 description 1
- 229920001778 nylon Polymers 0.000 description 1
- 239000005022 packaging material Substances 0.000 description 1
- 229920000515 polycarbonate Polymers 0.000 description 1
- 239000004417 polycarbonate Substances 0.000 description 1
- 229920001225 polyester resin Polymers 0.000 description 1
- 239000004645 polyester resin Substances 0.000 description 1
- 229920000306 polymethylpentene Polymers 0.000 description 1
- 239000011116 polymethylpentene Substances 0.000 description 1
- 229920005672 polyolefin resin Polymers 0.000 description 1
- 239000004800 polyvinyl chloride Substances 0.000 description 1
- 239000005033 polyvinylidene chloride Substances 0.000 description 1
- 238000004080 punching Methods 0.000 description 1
- 230000001954 sterilising effect Effects 0.000 description 1
- 238000004659 sterilization and disinfection Methods 0.000 description 1
- 230000002087 whitening effect Effects 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
- B29C51/002—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 characterised by the choice of material
-
- 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
- B29C49/00—Blow-moulding, i.e. blowing a preform or parison to a desired shape within a mould; Apparatus therefor
- B29C49/0005—Blow-moulding, i.e. blowing a preform or parison to a desired shape within a mould; Apparatus therefor characterised by the material
-
- 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
- B29C49/00—Blow-moulding, i.e. blowing a preform or parison to a desired shape within a mould; Apparatus therefor
- B29C49/42—Component parts, details or accessories; Auxiliary operations
- B29C49/78—Measuring, controlling or regulating
- B29C49/786—Temperature
- B29C2049/7861—Temperature of the preform
- B29C2049/7862—Temperature of the preform characterised by temperature values or ranges
-
- 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
- B29C2791/00—Shaping characteristics in general
- B29C2791/004—Shaping under special conditions
- B29C2791/006—Using vacuum
-
- 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
- B29C51/10—Forming by pressure difference, e.g. vacuum
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
- B29K—INDEXING SCHEME ASSOCIATED WITH SUBCLASSES B29B, B29C OR B29D, RELATING TO MOULDING MATERIALS OR TO MATERIALS FOR MOULDS, REINFORCEMENTS, FILLERS OR PREFORMED PARTS, e.g. INSERTS
- B29K2067/00—Use of polyesters or derivatives thereof, as moulding material
- B29K2067/006—PBT, i.e. polybutylene terephthalate
Landscapes
- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Manufacturing & Machinery (AREA)
- Casting Or Compression Moulding Of Plastics Or The Like (AREA)
- Blow-Moulding Or Thermoforming Of Plastics Or The Like (AREA)
- Compositions Of Macromolecular Compounds (AREA)
- Manufacture Of Macromolecular Shaped Articles (AREA)
- Processing And Handling Of Plastics And Other Materials For Molding In General (AREA)
Abstract
Description
【発明の詳細な説明】
［産業上の利用分野］
本発明は、例えば電子レンジに用いられるブラスチック
容器や加熱殺菌、ホットフィルが可能な容器の製造方法
に関する。DETAILED DESCRIPTION OF THE INVENTION [Industrial Application Field] The present invention relates to a method of manufacturing a plastic container used, for example, in a microwave oven, or a container that can be heat sterilized or hot-filled.
［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ブのプラ
スチック容器の素材としては、フィラー入りのポリプロ
ピレン（ＰＰ）、およびポリエチレンテレフタレート（
Ｃ−ＰＥＴ）が広く用いられているにれらは不透明のも
のが多く、一部には透明性を有するポリプロピレン単体
を素材としたものもあるが、耐熱性に欠ける問題がある
。[Prior Art] Conventionally, the materials for one-way plastic containers used in microwave ovens include filler-containing polypropylene (PP) and polyethylene terephthalate (PP).
C-PET), which are widely used, are often opaque, and some are made from transparent polypropylene alone, but they lack heat resistance.
透明で耐熱性を有するプラスチック素材としては、例え
ば、ボリアリレート（ＰＡＲ） 、ポリカーボネイト（
ｐｃ）、ポリメチルペンテン（ＴＰＸ）等が知られてお
り、それらは、通常インジェクション成形によって容器
に製造される。Examples of transparent and heat-resistant plastic materials include polyarylate (PAR) and polycarbonate (
pc), polymethylpentene (TPX), etc. are known, and they are usually manufactured into containers by injection molding.
また、ブロー成形用透明容器の素材としては、従来、ポ
リエチレンテレフタレート（以下 ＰＥＴと略記する。Furthermore, polyethylene terephthalate (hereinafter abbreviated as PET) has conventionally been used as a material for transparent containers for blow molding.
）、ポリ塩化ビニル（ＰＶＣ）などが知られている。), polyvinyl chloride (PVC), and the like are known.
［発明が解決しようとする課題］
しかし、インジェクション成形の場合、他の成形に比へ
金型の作製が厄介で、そのコストも高く、また肉厚の薄
いものができないなどの理由により、販売ロットの小さ
いワンウェイタイブの容器としては適当でない。そのた
め、このような用途には真空、圧空、真空圧空成形また
はプレス成形されたものが用いられている。[Problems to be solved by the invention] However, in the case of injection molding, compared to other molding methods, it is more difficult to create a mold, the cost is high, and it is not possible to produce thin-walled products, so sales lots are limited. It is not suitable as a small one-way type container. Therefore, for such uses, materials formed by vacuum, compressed air, vacuum-pressure molding, or press molding are used.
一般に、真空、圧空、真空圧空成形、プレス成形は、プ
ラスチック材料製のシートをヒーター熱板等で加熱し、
シートが軟化したところで、金型に密着固化させる方法
が行なわれている。In general, vacuum, compressed air, vacuum-pressure forming, and press molding involve heating a sheet of plastic material with a heater hot plate, etc.
Once the sheet has softened, a method is used in which it is tightly solidified in a mold.
この成形に使用されるプラスチック材料の中で特にポリ
ブチレンテレフタレート（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、さらに価格の安い
ＰＥＴ系樹脂との相溶性が良く、これを配合使用できる
ので耐熱包装材料用として望ましい。Among the plastic materials used for this molding, especially polybutylene terephthalate (hereinafter abbreviated as PBT).
The PET-based resin has excellent heat resistance and is relatively inexpensive compared to other engineering plastics. Furthermore, it has good compatibility with the cheaper PET-based resin, and can be used in combination with the PET-based resin, making it desirable as a heat-resistant packaging material.
また、ＰＢＴ系樹脂はＰＥＴ系樹脂と相互融着性を有し
、その混合物は適度の透明性を有する。Further, the PBT resin has mutual fusion properties with the PET resin, and the mixture thereof has appropriate transparency.
さらに、ＰＥＴ系樹脂はＰＢＴ系樹脂に比べ結晶化速度
が遅いため、比較的厚手のものの透明シートを得ること
ができる。Furthermore, since PET resin has a slower crystallization speed than PBT resin, a relatively thick transparent sheet can be obtained.
しかし、ＰＢＴ系樹脂は前述のように耐熱性には優れて
いるが結晶化のスピードが速く、すぐに白化するため、
透明なシートを得るためには厚さ０．２ｍｍが限界であ
り、それ以上厚い透明なシートは難しく、また、０．２
ｍｍ以下の透明なシートでも結晶化スピードが速いため
、通常の真空、圧空真空圧空、プレス成形では困難とさ
れている。However, as mentioned above, although PBT resin has excellent heat resistance, it crystallizes quickly and turns white quickly.
In order to obtain a transparent sheet, the maximum thickness is 0.2 mm, and it is difficult to obtain a transparent sheet thicker than 0.2 mm.
Because the crystallization speed is fast even for a transparent sheet with a diameter of less than mm, it is difficult to form it using ordinary vacuum, compressed air, vacuum pressure, or press molding.
また、前記ブロー成形用素材としてのＰｖＣ１ＰＥＴ単
体品は耐熱単体穴け、ジュースなどの果汁飲料のホット
フィル方式やレトルトなどの加熱殺菌方式には不向きで
ある。Furthermore, the PvC1PET single product as the material for blow molding is unsuitable for heat-resistant single hole punching, hot fill methods for fruit juice drinks such as juice, and heat sterilization methods such as retorts.
したがって、本発明の課題は、ＰＢＴ系樹脂を用いて真
空、圧空、真空圧空成形、プレス成形することにより、
電子レンジ用として耐熱性、透明性を有する良好な容器
やブロー成形によって耐熱性、透明性を有するボトル容
器の製造方法を提供することにある。Therefore, the problem of the present invention is to perform vacuum, compressed air, vacuum-pressure molding, and press molding using PBT resin.
It is an object of the present invention to provide a container having good heat resistance and transparency for use in a microwave oven, and a method for producing a bottle container having heat resistance and transparency by blow molding.
［課題を解決するための手段］
本発明者は、上記課題を解決するために鋭意研究した結
果、前記特許請求の範囲の請求項１ないし５に記載の要
件から成る耐熱性樹脂容器の製造方法が上記課題を効果
的に解決し得ることを見出した。[Means for Solving the Problems] As a result of intensive research to solve the above problems, the present inventor has developed a method for manufacturing a heat-resistant resin container comprising the requirements set forth in claims 1 to 5 of the claims. It has been found that the above problems can be effectively solved.
以下、本発明を具体的に説明する。The present invention will be specifically explained below.
本発明に用いられるＰＢＴ系樹脂は、単独重合体および
共重合体であり、ＰＥＴ系樹脂は、単独重合体および共
重合体である。PBT resins used in the present invention are homopolymers and copolymers, and PET resins are homopolymers and copolymers.
本発明においては、ＰＢＴ系樹脂とＰＥＴ系樹脂との混
合物は広い配合割合で用いられる。その割合はＰＢＴ系
樹脂１０〜１００重量部に対してＰＥＴ系樹脂９０〜０
重量部である。ＰＢＴ系樹脂が１０重量部未満、ＰＥＴ
系樹脂が９０重量部以上になると、金型内で結晶化させ
ても透明性を得ることができないので好ましくない。In the present invention, a mixture of PBT resin and PET resin is used in a wide range of blending ratios. The ratio is 90 to 0 parts by weight of PET resin to 10 to 100 parts by weight of PBT resin.
Parts by weight. Less than 10 parts by weight of PBT resin, PET
If the amount of the system resin exceeds 90 parts by weight, transparency cannot be obtained even if the resin is crystallized in the mold, which is not preferable.
さらに、本発明におけるＰＢＴ系樹脂とＰＥＴ系樹脂と
の混合物のより好ましい配合割合としては、ＰＥＴ系樹
脂３０重量部以下、ＰＢＴ系樹脂７０重量部以上であり
、ＰＥＴ系樹脂の比率を上げていくに従がって、透明性
が悪くなるのでＰＥＴ系樹脂３０重量部以下にするのが
よい。Furthermore, a more preferable blending ratio of the mixture of PBT resin and PET resin in the present invention is 30 parts by weight or less of PET resin and 70 parts by weight or more of PBT resin, and the ratio of PET resin is increased. As a result, transparency deteriorates, so it is preferable to limit the amount of PET resin to 30 parts by weight or less.
本発明において、上記組成物を真空、圧空、真空圧空成
形、プレス成形およびブロー成形により容器を製造する
場合のシートまたはパリソン温度は３０℃〜１００℃の
範囲である。この温度が３０℃より低いとシートまたは
パリソンを伸ばすことができず、１００℃より高いと成
形する前にシートまたはパリソンが結晶化してしまい、
同様にシートまたはパリソンを伸ばすことができない。In the present invention, the sheet or parison temperature is in the range of 30°C to 100°C when a container is manufactured from the above composition by vacuum, air pressure, vacuum pressure forming, press molding, and blow molding. If this temperature is lower than 30°C, the sheet or parison cannot be stretched, and if it is higher than 100°C, the sheet or parison will crystallize before being formed.
Similarly, sheets or parisons cannot be stretched.
また、本発明における真空、圧空、真空圧空成形、プレ
ス成形、ブロー成形時の金型温度は、設定されたシート
またはパリソン温度より高い温度で成形される。これら
の金型温度としてより好ましい範囲としては７０℃〜２
２４℃である。この金型温度が７０℃より低いと成形し
にくく、金型内での結晶化も進まなく、また、使用され
るＰＢＴ系樹脂の軟化点が２２４℃のため２２４℃を超
えると成形不能となり好ましくない。Further, the mold temperature during vacuum, pressure forming, vacuum pressure forming, press molding, and blow molding in the present invention is higher than the set sheet or parison temperature. A more preferable range of these mold temperatures is 70°C to 2
It is 24°C. If the mold temperature is lower than 70°C, it will be difficult to mold and crystallization will not proceed within the mold, and since the softening point of the PBT resin used is 224°C, molding will become impossible if it exceeds 224°C, which is preferable. do not have.
本発明の他の製造方法においては、ＰＢＴ系樹脂、ＰＥ
Ｔ系樹脂、およびこの両樹脂を前記範囲割合で配合した
混合樹脂から選択される少なくとも２種を共押出しまた
はラミネートしたものが使用される。In another manufacturing method of the present invention, PBT resin, PE
A product obtained by coextruding or laminating at least two selected from T-based resin and a mixed resin containing both resins in the proportions within the above range is used.
この樹脂の組合せは、例えば、ＰＢＴ系樹脂単体、ＰＢ
Ｔ系樹脂−ＰＢＴ系樹脂、ＰＢＴ系樹脂−ＰＥＴ系樹脂
、ＰＢＴ系樹脂−ＰＥＴ系樹脂とＰＢＴ系樹脂の混合物
、ＰＥＴ系樹脂−ＰＥＴ系樹脂とＰＢＴ系樹脂の混合物
、ＰＢＴ系樹脂−ＰＥＴ系樹脂−ＰＢＴ系樹脂などが挙
げられる。This combination of resins includes, for example, PBT resin alone, PB
T-based resin - PBT-based resin, PBT-based resin - PET-based resin, PBT-based resin - mixture of PET-based resin and PBT-based resin, PET-based resin - mixture of PET-based resin and PBT-based resin, PBT-based resin - PET-based resin Examples include resin-PBT resin.
本発明に用いられるＰＢＴ系樹脂には、必要に応じて帯
電防止剤、防曇剤等の界面活性剤やガラス繊維等のフィ
ラーなど有機物および無機物を添加することは任意であ
る。It is optional to add organic and inorganic substances such as surfactants such as antistatic agents and antifogging agents and fillers such as glass fibers to the PBT resin used in the present invention, if necessary.
さらに、この樹脂層に少なくとも１層のバリヤー層を設
けることもできる。Furthermore, this resin layer can also be provided with at least one barrier layer.
このバリヤー層の樹脂としては、ポリ塩化ビニリデン（
ＰＶＤＣ）、エチレン−ビニルアルコール共重合物（Ｅ
ＶＯＨ） 、各種ナイロン樹脂等が挙げられる。The resin for this barrier layer is polyvinylidene chloride (
PVDC), ethylene-vinyl alcohol copolymer (E
VOH), various nylon resins, etc.
［実施例］
実施例】
ＰＢＴ （ポリプラスチックス社製商品名、６００ＦＰ
）とＰＥＴ（鐘紡社製商品名、ＴＫ−３）とを第１表に
示す割合で５０φの押出機に供給し、６５０ｍｍ巾のＴ
ダイを取り付けて成膜して、得られたシートの透明限界
厚さを測定したところ、第１表に示すような結果が得ら
れた。[Example] Example] PBT (Product name manufactured by Polyplastics Co., Ltd., 600FP
) and PET (manufactured by Kanebo Co., Ltd., trade name, TK-3) were fed into a 50φ extruder in the proportions shown in Table 1, and a 650mm wide T
When a die was attached to form a film and the transparent limit thickness of the obtained sheet was measured, the results shown in Table 1 were obtained.
第 １ 表
金品およびＰＥＴ単体では１．０ｍｍ厚まで透明品を製
造することができたが、冷却ロールの温度を高くすると
同条件で押出したシートも透明性が失なわれ、成形も不
能となった。1. Transparent products up to a thickness of 1.0 mm could be manufactured using sheet metal products and PET alone, but when the temperature of the cooling roll was increased, sheets extruded under the same conditions also lost their transparency, making it impossible to form them. Ta.
実施例２
５０φまたは３０φの押出機に、２５０ｍｍ巾の２種３
層マルチマニホールドダイを取り付け、ＰＢＴ （ポリ
プラスチックス社製商品名、６００ＦＰ）とＰＥＴ（鐘
紡社製商品名、τに−３）の割合を変えて共押出しを行
ない製膜し、得られた４種のシートの透明性を調べ、そ
の結果を第２表に示した。Example 2 2 kinds 3 of 250 mm width in a 50φ or 30φ extruder
A layered multi-manifold die was attached, and the ratio of PBT (trade name, manufactured by Polyplastics Co., Ltd., 600FP) and PET (trade name, manufactured by Kanebo Co., Ltd., τ = -3) was changed to perform coextrusion to form a film. The transparency of the seed sheets was examined and the results are shown in Table 2.
第 ２ 表
この結果から明らかなように、ＰＢＴ単体では、透明限
界厚さが０．２ｍｍであったのに対し、混Ｏ：透明性有
り。Table 2 As is clear from the results, the transparent limit thickness of PBT alone was 0.2 mm, whereas the mixed O: transparent.
×：透明性無し
この表から明らかなように、シート阻３およびシート嵐
４のようにＰＢＴの総厚さが０．２ｍｍを越えると透明
性が失われ白化現象を起こした。また、シート磁２に示
すようにＰＥＴの総厚さを０、５ｍｍまで増加させても
透明性は失われることはなかった。×: No transparency As is clear from this table, when the total thickness of PBT exceeded 0.2 mm, as in Sheet Ii 3 and Sheet Arashi 4, transparency was lost and a whitening phenomenon occurred. Further, as shown in sheet magnet 2, transparency was not lost even when the total thickness of PET was increased to 0.5 mm.
実施例３
実施例１または実施例２の押出機を用いて製膜し、得ら
れたシートのシート温度、金型温度等の条件を変えて成
形を行ない、得られた容器の耐熱性、透明性を調へた結
果、第３表に示すとおりであった。Example 3 A film was formed using the extruder of Example 1 or Example 2, and the resulting sheet was molded by changing the sheet temperature, mold temperature, etc., and the heat resistance and transparency of the resulting container were improved. The results of examining the gender are shown in Table 3.
この結果から明らかなように、ＰＥＴ系樹脂単体の場合
を除き、シートの温度が１００℃より高いと金型成形前
にシートの結晶化が急速に進み、真空成形は不可能であ
った。As is clear from this result, except in the case of PET resin alone, when the sheet temperature was higher than 100° C., the sheet rapidly crystallized before molding, making vacuum forming impossible.
また、金型温度が７０℃より低いと容器の耐熱性が弱か
った。Further, when the mold temperature was lower than 70°C, the heat resistance of the container was weak.
実施例４
実施例１で用いたＰＢＴとＰＥＴとの混合比率を変えた
組成物を、ブロー成形機（シンシナティミクロン社製、
Ｒ１（Ｂ−Ｖ ）を用いてブロー成形を行い、それぞれ
について透明性、耐熱性等を調べた。その結果を各混合
比率とともに第４表に示した。Example 4 A composition with a different mixing ratio of PBT and PET used in Example 1 was molded using a blow molding machine (manufactured by Cincinnati Micron,
Blow molding was performed using R1 (B-V), and the transparency, heat resistance, etc. of each was examined. The results are shown in Table 4 along with each mixing ratio.
この結果から明らかなようにＰＥＴの混合比率が高くな
ると成形はしやすくなるが、逆に透明性は悪くなるとい
う結果が得られた。ＰＢＴ系樹脂単体に関しては、結晶
化スピードが速く、成形ができなかった。As is clear from these results, as the mixing ratio of PET increases, molding becomes easier, but transparency deteriorates. Regarding PBT resin alone, the crystallization speed was fast and molding was not possible.
［発明の効果コ
本発明の製造方法によれば、ＰＢＴ系樹脂シート、ＰＢ
Ｔ系樹脂およびＰＥＴ系樹脂の混合樹脂シート、または
それらの樹脂を共押出しまたはラミネートされたシート
を低温で真空、圧空、真空圧空、プレス成形し、高温金
型中で結晶化させること、あるいは上記樹脂組成物また
は積層物を所定の条件の下でブロー成形することにより
、１４０℃以上の耐熱性があり、透明性を持った容器を
効果的に製造することができる。[Effects of the Invention] According to the manufacturing method of the present invention, PBT-based resin sheets, PB
A mixed resin sheet of T-based resin and PET-based resin, or a coextruded or laminated sheet of these resins, is vacuum, compressed air, vacuum pressure air, press molded at low temperature and crystallized in a high temperature mold, or the above By blow-molding a resin composition or a laminate under predetermined conditions, it is possible to effectively produce a container that is heat resistant to 140° C. or higher and has transparency.
また、本発明に用いられるポリエステル系の樹脂は、ポ
リプロピレン樹脂等のようなオレフィン系樹脂にみられ
るように加熱しても臭いを発生することはなく、保香性
が高いため、香りを重視する用途の容器としても使用す
ることができる。In addition, the polyester resin used in the present invention does not emit an odor even when heated, unlike olefin resins such as polypropylene resin, and has high fragrance retention, so fragrance is important. It can also be used as a container.
さらに、本発明に使用される樹脂に耐電防止剤、防曇剤
等の界面活性剤やガラス繊維等のフィラーなどの有機物
や無機物を添加しない場合、高温時の不純物の溶出も非
常に少ないため、ベーキングキャリアテープ、ベーキン
グトレイとしての応用も可能である。また、本発明に使
用される樹脂層を設けることにより、ガスバリアー性の
すぐれたレトルト処理等に適合する耐熱性のある容器と
することも可能である。Furthermore, if organic or inorganic substances such as surfactants such as antistatic agents and antifogging agents and fillers such as glass fibers are not added to the resin used in the present invention, the elution of impurities at high temperatures is extremely small. It can also be used as a baking carrier tape or baking tray. Furthermore, by providing the resin layer used in the present invention, it is possible to provide a heat-resistant container with excellent gas barrier properties and suitable for retort processing.
Claims (1)
量部とポリエチレンテレフタレート系樹脂９０〜０重量
部を含む樹脂組成物を成膜し、得られたシートを３０〜
１００℃に加熱し、ついで前記シート温度よりも高い温
度に加熱調整された金型内で真空成形、圧空成形、真空
圧空成形、プレス成形により成形することを特徴とする
結晶性の耐熱性樹脂容器の製造方法。 ２、ポリブチレンテレフタレート系樹脂、ポリエチレン
テレフタレート系樹脂、およびポリブチレンテレフタレ
ート系樹脂１０〜１００重量部とポリエチレンテレフタ
レート系樹脂９０〜０重量部の混合樹脂から選択される
少なくとも２種を共押出しまたはラミネートにより積層
したシートを３０〜１００℃に加熱し、前記シート温度
よりも高い温度に加熱調整された金型内で真空成形、圧
空成形、真空圧空成形またはプレス成形することを特徴
とする結晶性の耐熱性樹脂容器の製造方法。 ３、樹脂を押出して形成された溶融シートを冷却ロール
、冷却ベルト、または水中で急冷し、結晶化度の低い透
明な状態で固化された後、加熱成形する請求項１または
２に記載の製造方法。 ４、請求項１〜２で用いる樹脂組成物あるいは積層物を
コールドパリソン方式により成形した成形物を３０〜１
００℃に加熱し、ついで金型をその温度よりも高い温度
に加熱調整し、ブロー成形することを特徴とする結晶性
の耐熱樹脂容器の製造方法。 ５、コールドパリソン法により成形され成形物を、加熱
成形にさきだって急冷して結晶化度の低い透明な状態で
固化させる請求項４に記載の製造方法。[Claims] 1. A resin composition containing 10 to 100 parts by weight of a polybutylene terephthalate resin and 90 to 0 parts by weight of a polyethylene terephthalate resin is formed into a film, and the resulting sheet is
A crystalline heat-resistant resin container that is heated to 100°C and then molded by vacuum forming, pressure forming, vacuum pressure forming, or press molding in a mold heated to a temperature higher than the sheet temperature. manufacturing method. 2. At least two selected from polybutylene terephthalate resin, polyethylene terephthalate resin, and a mixed resin of 10 to 100 parts by weight of polybutylene terephthalate resin and 90 to 0 parts by weight of polyethylene terephthalate resin by coextrusion or lamination. A crystalline heat-resistant product characterized by heating a laminated sheet to 30 to 100°C and performing vacuum forming, pressure forming, vacuum pressure forming, or press forming in a mold heated to a temperature higher than the sheet temperature. A method for manufacturing a plastic container. 3. The production according to claim 1 or 2, wherein the molten sheet formed by extruding the resin is rapidly cooled using a cooling roll, a cooling belt, or in water, solidified in a transparent state with low crystallinity, and then heated and molded. Method. 4. A molded product obtained by molding the resin composition or laminate used in claims 1 to 2 by a cold parison method to 30 to 1
1. A method for producing a crystalline heat-resistant resin container, which comprises heating the container to 00°C, then heating a mold to a temperature higher than that temperature, and performing blow molding. 5. The manufacturing method according to claim 4, wherein the molded product formed by the cold parison method is rapidly cooled prior to heat molding to solidify it in a transparent state with a low degree of crystallinity.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP2173859A JP2553228B2 (en) | 1990-06-30 | 1990-06-30 | Method for manufacturing heat-resistant resin container |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP2173859A JP2553228B2 (en) | 1990-06-30 | 1990-06-30 | Method for manufacturing heat-resistant resin container |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPH0463836A true JPH0463836A (en) | 1992-02-28 |
| JP2553228B2 JP2553228B2 (en) | 1996-11-13 |
Family
ID=15968468
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP2173859A Expired - Lifetime JP2553228B2 (en) | 1990-06-30 | 1990-06-30 | Method for manufacturing heat-resistant resin container |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JP2553228B2 (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO1997038845A1 (en) * | 1996-04-18 | 1997-10-23 | Nippon Steel Chemical Co., Ltd. | Multi-layered blow molded body and multi-layered blow molding method |
| WO2023002964A1 (en) * | 2021-07-19 | 2023-01-26 | 東洋製罐株式会社 | Lamination film and microwave oven pouch |
Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS5418374A (en) * | 1977-07-12 | 1979-02-10 | Teijin Ltd | Frozen food wrapper |
| JPH01121335A (en) * | 1987-11-05 | 1989-05-15 | Teijin Ltd | Polyester sheet and thermoforms therefrom |
-
1990
- 1990-06-30 JP JP2173859A patent/JP2553228B2/en not_active Expired - Lifetime
Patent Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS5418374A (en) * | 1977-07-12 | 1979-02-10 | Teijin Ltd | Frozen food wrapper |
| JPH01121335A (en) * | 1987-11-05 | 1989-05-15 | Teijin Ltd | Polyester sheet and thermoforms therefrom |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO1997038845A1 (en) * | 1996-04-18 | 1997-10-23 | Nippon Steel Chemical Co., Ltd. | Multi-layered blow molded body and multi-layered blow molding method |
| CN1064304C (en) * | 1996-04-18 | 2001-04-11 | 新日铁化学株式会社 | Multi-layered blow molded body and multi-layered blow molding method |
| WO2023002964A1 (en) * | 2021-07-19 | 2023-01-26 | 東洋製罐株式会社 | Lamination film and microwave oven pouch |
Also Published As
| Publication number | Publication date |
|---|---|
| JP2553228B2 (en) | 1996-11-13 |
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