JPH0123938Y2 - - Google Patents
Info
- Publication number
- JPH0123938Y2 JPH0123938Y2 JP14012881U JP14012881U JPH0123938Y2 JP H0123938 Y2 JPH0123938 Y2 JP H0123938Y2 JP 14012881 U JP14012881 U JP 14012881U JP 14012881 U JP14012881 U JP 14012881U JP H0123938 Y2 JPH0123938 Y2 JP H0123938Y2
- Authority
- JP
- Japan
- Prior art keywords
- bottle
- resin layer
- saturated polyester
- molded body
- polyester resin
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Expired
Links
- 229920005989 resin Polymers 0.000 claims description 35
- 239000011347 resin Substances 0.000 claims description 35
- 229920001225 polyester resin Polymers 0.000 claims description 34
- 239000004645 polyester resin Substances 0.000 claims description 34
- 229920006395 saturated elastomer Polymers 0.000 claims description 34
- 238000010438 heat treatment Methods 0.000 claims description 21
- 230000002093 peripheral effect Effects 0.000 claims description 21
- 230000002087 whitening effect Effects 0.000 claims description 13
- 239000003086 colorant Substances 0.000 claims description 6
- 239000010410 layer Substances 0.000 description 32
- 238000000071 blow moulding Methods 0.000 description 10
- 239000000047 product Substances 0.000 description 10
- 238000002425 crystallisation Methods 0.000 description 8
- 230000008025 crystallization Effects 0.000 description 8
- 238000000034 method Methods 0.000 description 7
- 230000001105 regulatory effect Effects 0.000 description 6
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 6
- 239000012530 fluid Substances 0.000 description 5
- 238000000465 moulding Methods 0.000 description 5
- 239000000049 pigment Substances 0.000 description 5
- 239000000126 substance Substances 0.000 description 5
- 239000004594 Masterbatch (MB) Substances 0.000 description 4
- 230000000694 effects Effects 0.000 description 4
- 239000002994 raw material Substances 0.000 description 3
- XEEYBQQBJWHFJM-UHFFFAOYSA-N Iron Chemical compound [Fe] XEEYBQQBJWHFJM-UHFFFAOYSA-N 0.000 description 2
- 150000001298 alcohols Chemical class 0.000 description 2
- 238000004040 coloring Methods 0.000 description 2
- 238000001816 cooling Methods 0.000 description 2
- 150000002148 esters Chemical class 0.000 description 2
- 230000001771 impaired effect Effects 0.000 description 2
- 238000001746 injection moulding Methods 0.000 description 2
- 239000007788 liquid Substances 0.000 description 2
- 238000002844 melting Methods 0.000 description 2
- 230000008018 melting Effects 0.000 description 2
- 239000002344 surface layer Substances 0.000 description 2
- 230000004888 barrier function Effects 0.000 description 1
- 238000007664 blowing Methods 0.000 description 1
- 239000000919 ceramic Substances 0.000 description 1
- 235000019993 champagne Nutrition 0.000 description 1
- 230000008859 change Effects 0.000 description 1
- 239000013065 commercial product Substances 0.000 description 1
- 230000001276 controlling effect Effects 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 239000000945 filler Substances 0.000 description 1
- 230000009477 glass transition Effects 0.000 description 1
- 230000006872 improvement Effects 0.000 description 1
- 229910052742 iron Inorganic materials 0.000 description 1
- 230000001678 irradiating effect Effects 0.000 description 1
- 238000004519 manufacturing process Methods 0.000 description 1
- 239000000203 mixture Substances 0.000 description 1
- 238000003825 pressing Methods 0.000 description 1
- 230000009467 reduction Effects 0.000 description 1
- 230000003068 static effect Effects 0.000 description 1
- ANRHNWWPFJCPAZ-UHFFFAOYSA-M thionine Chemical compound [Cl-].C1=CC(N)=CC2=[S+]C3=CC(N)=CC=C3N=C21 ANRHNWWPFJCPAZ-UHFFFAOYSA-M 0.000 description 1
- 238000013022 venting Methods 0.000 description 1
Description
【考案の詳細な説明】
「産業上の利用分野」
本考案は、飽和ポリエステル樹脂による２軸延
伸ブロー成形体からなる壜体に関するものであ
り、２軸延伸による十分な機械的諸強度の向上と
化学薬品類に対する安定性とを導入することので
きない壜体底部においても、２軸延伸が導入され
ている壜胴部と同様の機械的諸強度の向上と化学
薬品類に対する安定性と耐熱性とを具備する飽和
ポリエステル樹脂製壜体を提供するものである。[Detailed description of the invention] "Industrial application field" The present invention relates to a bottle made of a biaxially stretched blow-molded product made of saturated polyester resin, and it is possible to achieve sufficient mechanical strength through biaxial stretching. Even in the bottom of the bottle, where stability against chemicals cannot be introduced, the same mechanical strength improvement and stability against chemicals and heat resistance as in the body of the bottle where biaxial stretching has been introduced can be achieved. A saturated polyester resin bottle is provided.
「従来の技術」
飽和ポリエステル樹脂による２軸延伸ブロー成
形体からなる壜体は、ガスバリヤー性、透明性、
耐衝撃性、衛生特性等において優れた性質を有し
ており、主として液体充填用の壜体として広く利
用されているものである。``Prior art'' A bottle made of a biaxially stretched blow-molded body made of saturated polyester resin has excellent gas barrier properties, transparency,
It has excellent properties such as impact resistance and sanitary properties, and is widely used mainly as a bottle for filling liquids.
しかして、前記飽和ポリエステル樹脂による２
軸延伸ブロー成形体からなる壜体における前述の
諸特性は、２軸延伸による分子の配向によつて得
られているものであり、２軸延伸ブロー成形時の
延伸が十分にかけられないままで成形されてしま
う壜体底部には、前記２軸延伸による諸特性を導
入し得ないため、例えば、高濃度のアルコール類
やエステル類を含有する内容物が充填された場合
には、前記壜体底部の内周面がアルコール類やエ
ステル類に侵されて壜内周面側からの白化が発生
したり、あるいは、２軸延伸ブロー成形時におけ
る残留応力の緩和現象が促進されてクレージング
現象が発生したり等の問題を有しているばかりで
なく、前記壜体底部における耐熱性が十分でない
ため、熱充填時において前記底部が変形し易く、
その外観が損なわれることとなつたり、さらに
は、所定量の容積を収容し得なくなることが生ず
る等の欠点を有している。 Therefore, 2
The above-mentioned properties of the bottle made of an axially stretched blow-molded product are obtained by the orientation of molecules through biaxial stretching, and the bottle is formed without sufficient stretching during biaxially stretched blow molding. Since the various properties due to the biaxial stretching cannot be introduced to the bottom of the bottle, which is otherwise The inner circumferential surface of the bottle may be attacked by alcohols or esters, causing whitening from the inner circumferential side of the bottle, or the relaxation of residual stress during biaxial stretch blow molding may be accelerated, causing a crazing phenomenon. Not only do they have problems such as leakage, but also the bottom part of the bottle does not have sufficient heat resistance, so the bottom part is easily deformed during hot filling.
It has drawbacks such as its appearance being impaired and furthermore, it may not be able to accommodate a predetermined amount of volume.
また、前記２軸延伸ブロー成形時の延伸が十分
にかけられないままで成形されてしまう壜体底部
は、該部分における機械的強度が十分でなく、例
えば、壜体の底部中央部分が壜体内部方向へ凸出
するシヤンパンタイプの壜体の場合に、内圧が付
加されるような内容物が充填されると、前記底部
が壜体外方へ凸出するような変形が生ずるため、
静置安定性が悪くなるだけでなく、外観不良によ
つて商品として流通し得なくなるという欠点をも
有している。 In addition, the bottom of the bottle, which is formed without being sufficiently stretched during the biaxial stretch blow molding, does not have sufficient mechanical strength at that part. In the case of a champagne type bottle that protrudes in the direction, when it is filled with contents that apply internal pressure, the bottom part is deformed so as to protrude outward from the bottle.
Not only does it have poor static stability, but it also has the disadvantage that it cannot be distributed as a commercial product due to poor appearance.
このため、飽和ポリエステル樹脂による２軸延
伸ブロー成形体からなる壜体を成形する際に、壜
体底部に対して壜胴部と同様の加熱処理を行なう
（壜体底部を、例えば、加熱金型に接触させる、
外周面から高周波によつて加熱する、外周面から
熱風や赤外線によつて加熱する）ことによつて、
前記底部における飽和ポリエステル樹脂を結晶化
させ、前記部分に機械的強度や耐熱性等の諸特性
を導入している。 For this reason, when molding a bottle made of a biaxially stretched blow-molded body made of saturated polyester resin, the bottom of the bottle is subjected to the same heat treatment as the body of the bottle (for example, the bottom of the bottle is heated in a heating mold). contact with,
(heating from the outer circumferential surface with high frequency waves, heating from the outer circumferential surface with hot air or infrared rays),
The saturated polyester resin in the bottom portion is crystallized to provide the portion with various properties such as mechanical strength and heat resistance.
「考案が解決しようとする課題」
ところで、前述の飽和ポリエステル樹脂による
２軸延伸ブロー成形体からなる壜体において、壜
体底部に対して機械的強度等を熱処理によつて付
与する前述の方法によるものは、殆ど延伸のかか
つていない壜体底部の全部分に亙つて飽和ポリエ
ステル樹脂が結晶化してしまうため、結晶化によ
つて発生した球晶のために前記壜体底部が白色化
してしまい、このことが外観を著しく損なうこと
となり、場合によつては前記結晶化による白色化
が、商品価値を失墜させることにもなるという欠
点を有している。``Problem to be solved by the invention'' By the way, in the bottle made of the above-mentioned biaxially stretched blow-molded body made of saturated polyester resin, the above-mentioned method of imparting mechanical strength etc. to the bottom of the bottle through heat treatment can be applied. However, since the saturated polyester resin crystallizes over the entire bottom of the bottle, which has never been stretched, the bottom of the bottle turns white due to the spherulites generated by crystallization. This has the drawback that the appearance is significantly impaired, and in some cases, the whitening caused by the crystallization can also cause a loss of commercial value.
これに対して本考案は、壜体底部において、壜
体の商品価値に大きな影響を与える白色化による
外観の不良がなく、しかも、前記部分の機械的諸
特性、耐化学薬品性、耐熱性等に優れた性質を有
する飽和ポリエステル樹脂製壜体を提供するもの
である。 In contrast, the present invention eliminates the appearance defects caused by whitening at the bottom of the bottle, which greatly affects the commercial value of the bottle, and also improves the mechanical properties, chemical resistance, heat resistance, etc. of the bottom of the bottle. The object of the present invention is to provide a saturated polyester resin bottle having excellent properties.
「課題を解決するための手段」
本考案の飽和ポリエステル樹脂製壜体は、着色
剤を含有する飽和ポリエステル樹脂によつて成形
されているバリソンを２軸延伸ブロー成形に付す
ことによつて得られたものであり、前記着色剤を
含有する飽和ポリエステル樹脂の単一樹脂層によ
つてその全壁部が構成されているものである。"Means for Solving the Problems" The saturated polyester resin bottle of the present invention is obtained by subjecting a balisong molded from a saturated polyester resin containing a colorant to biaxial stretch blow molding. The entire wall is composed of a single resin layer of a saturated polyester resin containing the colorant.
前記本考案の壜体は、該壜体の底部の壜体内周
面側に位置する部分のみが、熱処理による結晶化
樹脂層からなる白色化樹脂層で形成されているも
のであつて、しかも、前記結晶化樹脂層における
白色化（灰白色化〜乳白色化等による白色化）
が、該結晶化樹脂層の外側すなわち壜体外周面側
に位置する着色樹脂層によつて、外部からは視認
され得ない程度に隠蔽されているものである。 In the bottle of the present invention, only the portion of the bottom of the bottle located on the inner peripheral surface side of the bottle is formed of a whitened resin layer made of a crystallized resin layer formed by heat treatment, and furthermore, Whitening in the crystallized resin layer (whitening due to graying to milky whitening, etc.)
However, it is hidden to such an extent that it cannot be visually recognized from the outside by the colored resin layer located outside the crystallized resin layer, that is, on the side of the outer peripheral surface of the bottle.
前記構成からなる本考案の飽和ポリエステル樹
脂製壜体は、顔料、染料等の着色剤を含有する飽
和ポリエステル樹脂を成形用原料とする射出成形
等によつて得られたパリソン、通常は有底円筒形
状をなすパリソンを、２軸延伸ブロー成形に付し
た後に、殆ど未延伸のままになつている壜体底部
に対して、壜体内周面側からの熱処理を施すこと
によつて得られるものであり、前記壜体内周面側
からの熱処理によつて、前記壜体底部における壜
体内周面側に位置する部分のみが結晶化による白
色化層とされている壜体が得られるものである。 The saturated polyester resin bottle of the present invention having the above structure is a parison, usually a cylinder with a bottom, obtained by injection molding or the like using a saturated polyester resin containing a coloring agent such as a pigment or dye as a molding raw material. It is obtained by subjecting the shaped parison to biaxial stretch blow molding and then heat-treating the bottom of the bottle, which remains almost unstretched, from the inner circumferential side of the bottle. By the heat treatment from the inner peripheral surface side of the bottle, a bottle is obtained in which only the portion of the bottom of the bottle located on the inner peripheral surface side of the bottle has a whitened layer due to crystallization.
したがつて、前記壜体底部内周面側からの熱処
理の際には、熱処理の熱の影響が壜体底部の外周
面側に位置する樹脂層にまで及ぶことのないよう
に、前記熱処理中、壜体底部の外周面を冷却する
ことによつて、前記外周面側に位置する樹脂層が
結晶化温度以下の温度を維持し得るようにしてお
くことが必要である。 Therefore, during the heat treatment from the inner circumferential side of the bottom of the bottle, it is necessary to It is necessary to cool the outer peripheral surface of the bottom of the bottle so that the resin layer located on the outer peripheral surface side can maintain a temperature below the crystallization temperature.
なお、前記壜体底部において、壜体の内周面側
に位置する部分のみを、結晶化によつて白色化さ
せる際の熱処理はいかなる方法で行なわれても良
く、例えば、特開昭54−102377号公報に説明され
ている方法を利用した熱処理方法、すなわち、
２軸延伸ブロー成形後、得られた２軸延伸ブロ
ー成形体を金型から脱型し、次いで、熱処理用の
金型内に前記成形体を移し、該金型内にて前記成
形体に熱処理を施す方法において、
２軸延伸ブロー成形体の外郭形状と同一の立体
形状を具備するキヤビテイーを有し、かつ、前記
成形体における壜体底部（殆ど未延伸のままにな
つている部分）に対接する前記キヤビテイー側表
面の領域の下部には冷却装置が設けられており、
それ以外のキヤビテイ側表面の領域の下部には温
度調節用の液体が循環する温度調節用の流体通路
が設けられている熱処理用の金型内に、前記２軸
延伸ブロー成形体を装着し、
次いで、前記成形体の殆ど未延伸のままに残つ
ている壜体底部に対接するキヤビテイ側表面の領
域を、２軸延伸ブロー成形体の樹脂の結晶化温度
以下に冷却し、それ以外のキヤビテイ側の表面の
領域を、前記温度調節用流体通路内を循環してい
る温度調節用流体によつて、２軸延伸ブロー成形
体の融点以下の熱処理温度に保持すると共に、前
記成形体の内部に加圧気体を吹き込み、該成形体
の内壁面側から押圧することによつて、成形体の
外周壁面を前記キヤビテイの表面に密接、保形し
ながら、前記２軸延伸ブロー成形体の内部からの
赤外線ヒーター等による輻射エネルギーを照射す
ることによつて、前記温度調節用流体の温度より
も高く、また、前記２軸延伸ブロー成形体におけ
る飽和ポリエステル樹脂のガラス転移点以上でし
かも融点以下の温度での熱処理を行ない、
しかる後に、前記２軸延伸ブロー成形体の内部
より熱源を取り出し、成形体の壁部の温度を前記
温度調節用流体の温度付近に降下させ、さらに、
前記成形体内の加圧気体を抜気した後、さらに、
熱処理用金型から前述の２軸延伸ブロー成形体を
離型し、取り出すことからなる
熱処理方法を利用し得る。 Note that the heat treatment for whitening only the portion of the bottom of the bottle located on the inner circumferential surface side of the bottle through crystallization may be carried out by any method. A heat treatment method using the method described in Publication No. 102377, that is, after biaxial stretch blow molding, the obtained biaxial stretch blow molded body is removed from the mold, and then placed in a heat treatment mold. In the method of transferring the molded body and heat-treating the molded body in the mold, the molded body has a cavity having the same three-dimensional shape as the outer shape of the biaxially stretched blow-molded body, and A cooling device is provided below the region of the cavity side surface that is in contact with the bottom of the bottle (the part that remains almost unstretched);
The biaxially stretched blow-molded body is installed in a heat treatment mold in which a temperature regulating fluid passage through which a temperature regulating liquid circulates is provided in the lower part of the other cavity side surface area; Next, the area of the cavity side surface of the molded body that is in contact with the bottom of the bottle, which remains almost unstretched, is cooled to below the crystallization temperature of the resin of the biaxially stretched blow molded body, and the other cavity side The surface area of the molded body is maintained at a heat treatment temperature below the melting point of the biaxially stretched blow molded body by the temperature regulating fluid circulating in the temperature regulating fluid passage, and the inside of the molded body is heated. By blowing pressurized gas and pressing from the inner wall side of the molded body, infrared rays from inside the biaxially stretched blow-molded body are held while the outer peripheral wall surface of the molded body is kept in close contact with the surface of the cavity. By irradiating radiant energy from a heater or the like, the temperature is higher than the temperature regulating fluid, and is at a temperature higher than the glass transition point of the saturated polyester resin in the biaxially stretched blow-molded product but lower than the melting point. Heat treatment is performed, and then a heat source is taken out from inside the biaxially stretched blow molded body to lower the temperature of the wall portion of the molded body to around the temperature of the temperature regulating fluid, and further,
After venting the pressurized gas in the molded body, further,
A heat treatment method may be used which consists of releasing and taking out the biaxially stretched blow-molded body from the heat treatment mold.
前記本考案の飽和ポリエステル樹脂製壜体の壜
体抵部における白色化は、２軸延伸ブロー成形体
として得られている壜体の底部において、殆ど延
伸を受けることなく残つてしまう部分の壜体内周
面側に位置する部分に形成されているものであつ
て、前記白色化部分の厚さは、壜体の色調、壜体
に利用されている着色剤の種類、その含有量等に
よつて相違するもので、前記白色化部分の外周面
側に位置する非白色化、着色樹脂層の存在が、前
記白色化部分を隠蔽し得るものであれば良い。 The whitening in the bottle body part of the saturated polyester resin bottle of the present invention is caused by the whitening in the bottom part of the bottle obtained as a biaxially stretched blow-molded product, which is the part of the bottle that remains without being stretched. It is formed on the part located on the peripheral surface side, and the thickness of the whitened part depends on the color tone of the bottle, the type of coloring agent used in the bottle, its content, etc. It is sufficient that the presence of the non-whitened, colored resin layer located on the outer peripheral surface side of the whitened portion can hide the whitened portion.
「実施例」
以下、本考案の飽和ポリエステル樹脂製壜体の
具体的な構成を、製造実施例をもつて説明する。"Example" Hereinafter, the specific structure of the saturated polyester resin bottle of the present invention will be explained with reference to manufacturing examples.
実施例 １
飽和ポリエステル樹脂「RT−543（東洋紡績
(株)）」500重量部と、着色マスターバツチ「RX−
808（日本ピグメント(株)）」100重量部との混合物を
成形用原料とする射出成形を行なうことによつ
て、肉厚約2.5mmの黒緑色の有底円筒状のパリソ
ンを得た。Example 1 Saturated polyester resin “RT-543 (Toyobo Co., Ltd.)
Co., Ltd.” 500 parts by weight and colored masterbatch “RX-
808 (Nippon Pigment Co., Ltd.)" and 100 parts by weight was used as a molding raw material to obtain a dark green cylindrical parison with a black-green bottom and a wall thickness of approximately 2.5 mm.
なお、前記着色マスターバツチ「RX−808」
は、飽和ポリエステル樹脂「RT−543（東洋紡績
(株)）」100重量部と、顔料［シアニンブルー、アゾ
レイキ顔料（黄）、四三酸化鉄系顔料］0.4222重
量部とからなる着色飽和ポリエステル樹脂であ
る。 In addition, the coloring master batch "RX-808"
is a saturated polyester resin “RT-543” (Toyobo Co., Ltd.)
Co., Ltd.'' and 0.4222 parts by weight of pigments [cyanine blue, Azoreiki pigment (yellow), triiron tetroxide pigment].
次いで、前記有底円筒状のパリソンを、２軸延
伸ブロー成形機ASB150（日精ASB機械製）によ
る２軸延伸ブロー成形に付し、重量35g、容量
900mlの円筒形状の２軸延伸ブロー成形体を得た。 Next, the bottomed cylindrical parison was subjected to biaxial stretch blow molding using a biaxial stretch blow molding machine ASB150 (manufactured by Nissei ASB Machinery) to obtain a weight of 35 g and a volume of
A 900 ml cylindrical biaxially stretched blow-molded product was obtained.
しかる後に、前記得られた２軸延伸ブロー成形
体を、内部加熱方式による熱処理用金型内に装着
し、前記成形体の底部を保持する底部コア型部分
を19℃に、壜胴部部分を保持するコア型部分を91
〜96℃に、それぞれ温度調節しながら、前記成形
体の内部に加圧気体（圧力９Kg／cm2）を吹き込ん
で、前記成形体の外周面を前記金型の内周面に密
接させると共に、300〜400℃に加熱されているロ
ツドヒーター（350W、100V）を前記２軸延伸ブ
ロー成形体の内部に挿入し、該成形体の全内周面
を約30秒間加熱した。 Thereafter, the obtained biaxially stretched blow-molded body was placed in a heat treatment mold using an internal heating method, and the bottom core mold portion that holds the bottom of the molded body was heated to 19°C, and the bottle body portion was heated to 19°C. 91 core mold part to hold
Blow pressurized gas (pressure 9 Kg/cm 2 ) into the molded body while adjusting the temperature to ~96°C to bring the outer circumferential surface of the molded body into close contact with the inner circumferential surface of the mold, A rod heater (350W, 100V) heated to 300 to 400°C was inserted into the biaxially stretched blow-molded body, and the entire inner peripheral surface of the molded body was heated for about 30 seconds.
なお、前記２軸延伸ブロー成形体に対するロツ
ドヒーターによる加熱は、成形体の底部内周面に
対しては、接近加熱で行なつた。 The biaxially stretched blow-molded body was heated by a rod heater, and the inner circumferential surface of the bottom portion of the biaxially stretched blow-molded body was heated in close proximity.
続いて、前記ロツドヒーターを成形体内から引
き出し、その後約20秒間そのままに保持すること
によつて冷却した後、２軸延伸ブロー成形体を脱
型し、本考案の１実施例品たる飽和ポリエステル
樹脂製壜体を得た。 Next, the rod heater was pulled out from the molded body, and after cooling by holding it as it was for about 20 seconds, the biaxially stretched blow molded body was removed from the mold, and a mold made of saturated polyester resin, which is an example of the present invention, was removed. I got the bottle.
得られた前記壜体の底部における最大肉厚は約
2.2mmであり、その断面を観察したところ、図面
に示されるように、壜体底部Ｐにおける壜体の内
周面側の厚さ約1.5mmの部分が結晶化による白濁
色化樹脂層３とされており、その外側の外周面層
部分たる着色樹脂層２は黒緑色を呈しており、壜
体の外部から前記壜体底部Ｐを視た際には、壜体
底部Ｐの内周面側の前記白濁色化樹脂層３におけ
る白色状態は、該白濁色化樹脂層３の外側に位置
する着色樹脂層２の存在によつて隠蔽されている
ため、壜体底部全体が壜胴部１の色調とほとんど
連続する違和感のない同一色調を呈していた。 The maximum wall thickness at the bottom of the obtained bottle is approximately
2.2 mm, and when its cross section was observed, as shown in the drawing, the approximately 1.5 mm thick portion on the inner peripheral surface side of the bottle bottom P was a cloudy-colored resin layer 3 due to crystallization. The colored resin layer 2, which is the outer peripheral surface layer, has a black-green color, and when the bottom P of the bottle is viewed from outside the bottle, the inner peripheral surface of the bottom P of the bottle is visible. The white state of the cloudy resin layer 3 is hidden by the presence of the colored resin layer 2 located outside the cloudy resin layer 3, so the entire bottom of the bottle is covered with the bottle body 1. The color tone was almost continuous and the same color tone without any sense of incongruity.
また、前記飽和ポリエステル樹脂製壜体に85℃
の熱水を充填したところ、前記熱水充填による壜
体底部の変形もなく、熱水の充填前と同様な静置
安定性を有していた。 In addition, the saturated polyester resin bottle was heated at 85°C.
When the bottle was filled with hot water, there was no deformation of the bottom of the bottle due to the hot water filling, and the bottle had the same standing stability as before filling with hot water.
実施例 ２
飽和ポリエステル樹脂「RT−543（東洋紡績
(株)）」700重量部と、着色マスターバツチ「RX−
766（日本ピグメント(株)）」100重量部との混合物を
成形用原料とする射出成形を行なうことによつ
て、肉厚約2.5mmの茶色の有底円筒状のパリソン
を得た。Example 2 Saturated polyester resin “RT-543 (Toyobo Co., Ltd.)
Co., Ltd.” 700 parts by weight and colored masterbatch “RX-
A brown cylindrical parison with a bottom and a wall thickness of about 2.5 mm was obtained by injection molding using a mixture of 100 parts by weight of "766 (Nippon Pigment Co., Ltd.)" as a molding raw material.
なお、前記着色マスターバツチ「RX−766」
は、飽和ポリエステル樹脂「RT−543（東洋紡績
(株)）」100重量部と、顔料［四三酸化鉄、赤色鉄］
2.352重量部とからなる着色飽和ポリエステル樹
脂である。 In addition, the coloring master batch "RX-766"
is a saturated polyester resin “RT-543” (Toyobo Co., Ltd.)
Co., Ltd.” 100 parts by weight and pigment [triiron tetroxide, red iron]
2.352 parts by weight of a colored saturated polyester resin.
次いで、前記有底円筒状のパリソンを、２軸延
伸ブロー成形機ASB150（日精ASB機械製）によ
る２軸延伸ブロー成形に付し、重量35g、容量
900mlの円筒壜体形状の２軸延伸ブロー成形体を
得た。 Next, the bottomed cylindrical parison was subjected to biaxial stretch blow molding using a biaxial stretch blow molding machine ASB150 (manufactured by Nissei ASB Machinery) to obtain a weight of 35 g and a volume of
A biaxially stretched blow-molded product in the shape of a 900 ml cylindrical bottle was obtained.
しかる後に、前記２軸延伸ブロー成形体を、該
成形体における口部が下方になるように設定され
ている熱処理用の金型内にセツトし、前記成形体
の底部を保持する底部コア型の部分を19℃に温調
すると共に、セラミツク被覆されているロツドヒ
ーター（350W、100V）を前記成形体の口部から
成形体内部に挿入し、底部内周面を接近加熱する
ことによつて、本考案の１実施例品たる飽和ポリ
エステル樹脂製壜体を得た。 Thereafter, the biaxially stretched blow molded product is placed in a heat treatment mold that is set so that the mouth of the molded product faces downward, and a bottom core mold that holds the bottom of the molded product is inserted. While controlling the temperature of the part to 19°C, a ceramic-coated rod heater (350W, 100V) is inserted into the molded body from the mouth of the molded body, and the inner peripheral surface of the bottom part is closely heated. A saturated polyester resin bottle, which is an example of the invention, was obtained.
得られた前記壜体の底部における最大肉厚は約
2.0mmであり、その断面を観察したところ、壜体
の内周面側の厚さ約1.5mmに亙る部分が、結晶化
による白濁色化樹脂層とされており、その外側の
外周面層部分は、茶色に着色されており、壜体の
外部から前記底部を視た際には、該底部内周面側
の前記白濁色化樹脂層は、該白濁色化樹脂層の外
側に位置する着色樹脂層の存在によつて隠蔽され
ており、壜体底部全体は壜胴部の色調とほとんど
連続する違和感のない同一色調を呈していた。 The maximum wall thickness at the bottom of the obtained bottle is approximately
2.0 mm, and when we observed its cross section, we found that the approximately 1.5 mm thick portion on the inner circumference side of the bottle was a cloudy-white resin layer due to crystallization, and the outer circumferential layer on the outside is colored brown, and when the bottom is viewed from the outside of the bottle, the cloudy resin layer on the inner peripheral surface side of the bottom is colored brown, and the cloudy resin layer on the inner circumference side of the bottom is colored brown, and the cloudy resin layer on the inner peripheral surface side of the bottom is colored brown. This was hidden by the presence of the resin layer, and the entire bottom of the bottle exhibited the same color tone that was almost continuous with the color tone of the body of the bottle and did not give any sense of discomfort.
また、前記飽和ポリエステル樹脂製壜体に85℃
の熱水を充填したところ、前記熱水充填による壜
体底部の変形もなく、熱水の充填前と同様な静置
安定性を有していた。 In addition, the saturated polyester resin bottle was heated at 85°C.
When the bottle was filled with hot water, there was no deformation of the bottom of the bottle due to the hot water filling, and the bottle had the same standing stability as before filling with hot water.
「本考案の作用、効果」
本考案の飽和ポリエステル樹脂製壜体は、着色
剤を含有する飽和ポリエステル樹脂による２軸延
伸ブロー成形体からなる単一樹脂層の壜体であつ
て、前記壜体の底部における壜体内周面側に位置
する部分のみが、熱処理による結晶化樹脂層で形
成されており、しかも、前記結晶化樹脂層におけ
る白色化が、該結晶化樹脂層の外側に位置する着
色樹脂層によつて、外部からは視認され得ない程
度に隠蔽されているものである。"Operations and Effects of the Present Invention" The saturated polyester resin bottle of the present invention is a single resin layer bottle made of a biaxially stretched blow-molded body made of a saturated polyester resin containing a colorant, Only the portion of the bottom of the bottle located on the inner circumferential surface side of the bottle is formed of a heat-treated crystallized resin layer, and the whitening in the crystallized resin layer is different from the colored portion located outside the crystallized resin layer. It is hidden by the resin layer to such an extent that it cannot be visually recognized from the outside.
しかして、本考案の飽和ポリエステル樹脂製壜
体は、壜体底部を構成している壁部のうちの壜体
内周面側に位置する部分が、熱処理による結晶化
樹脂層で形成されているために、底部全体が熱処
理による結晶化樹脂層で形成されている従来の飽
和ポリエステル樹脂による２軸延伸ブロー成形体
からなる壜体の場合と同様に、耐化学薬品性が良
好であり、壜体底部が内填物中のアルコール類や
エステル類等に侵されたり、さらにはこれが原因
で、壜体の成形時の残留応力の緩和減少が促進さ
れることによるクレージング現象が発生したりす
るようなことがなく、また、加えられる圧力に対
して簡単に変形するようなこともなく、さらに
は、熱充填の際の熱によつて分子配向の変化を受
けることもないため、熱充填での変形に伴う載置
安定性の欠如等もなく、前記壜体底部には、機械
的強度、耐化学薬品性、耐熱性等において、優れ
た作用、効果が奏されるものである。 However, in the saturated polyester resin bottle of the present invention, the portion of the wall forming the bottom of the bottle, located on the inner peripheral surface side of the bottle, is formed of a crystallized resin layer formed by heat treatment. In addition, as in the case of a bottle made of a conventional biaxially stretched blow-molded body made of saturated polyester resin, the entire bottom of which is formed of a heat-treated crystallized resin layer, the bottom of the bottle has good chemical resistance. be attacked by alcohols, esters, etc. in the inner filler, and furthermore, this may cause a crazing phenomenon due to accelerated relaxation and reduction of residual stress during molding of the bottle. In addition, it does not easily deform due to the applied pressure, and furthermore, the molecular orientation does not change due to the heat during hot filling, so it does not easily deform during hot filling. There is no accompanying lack of placement stability, and the bottom of the bottle exhibits excellent functions and effects in terms of mechanical strength, chemical resistance, heat resistance, and the like.
また、本考案の飽和ポリエステル樹脂製壜体
は、壜体底部を構成している壁部のうちの壜体外
周面側に位置する部分が、白色化を伴うことのな
い着色樹脂層で形成されており、該樹脂層の存在
が、前述の壜体内周面側に位置する部分の白色化
樹脂層を隠蔽しているので、壜体底部と壜体胴部
とには、連続する違和感の無い色調が呈現される
ものであつて、特に透明性において優れた作用を
奏する飽和ポリエステル樹脂の２軸延伸ブロー成
形体からなる壜体で、白色化によつて強化されて
いる底部を具備する壜体の場合に問題となつてい
る外観不良の問題が無く、意匠効果において優れ
た作用を奏するものである。 In addition, in the saturated polyester resin bottle of the present invention, the portion of the wall constituting the bottom of the bottle that is located on the outer peripheral surface of the bottle is formed of a colored resin layer that does not whiten. The presence of this resin layer hides the aforementioned whitened resin layer located on the peripheral surface side of the bottle, so there is no sense of discomfort between the bottom of the bottle and the body of the bottle. A bottle made of a biaxially stretched blow-molded product of a saturated polyester resin that exhibits a color tone and has an excellent effect particularly in terms of transparency, and the bottle has a bottom portion reinforced by whitening. There is no problem of poor appearance, which is a problem in the case of , and it has an excellent design effect.
図は本考案の飽和ポリエステル樹脂製壜体の要
部をなす壜体底部部分を示す断面図である。
１……壜体胴部、Ｐ……壜体底部、２……外周
面層部分たる着色樹脂層、３……白色化樹脂層。
The figure is a cross-sectional view showing the bottom portion of the bottle, which is the main part of the saturated polyester resin bottle of the present invention. 1... Bottle body, P... Bottle bottom, 2... Colored resin layer serving as the outer peripheral surface layer portion, 3... Whitening resin layer.
Claims (1)
２軸延伸ブロー成形体からなる単一樹脂層の壜体
において、前記壜体の底部における壜体内周面側
に位置する部分のみが、熱処理による結晶化樹脂
層で形成されており、しかも、前記結晶化樹脂層
における白色化が、該結晶化樹脂層の外側に位置
する着色樹脂層によつて、外部からは視認され得
ない程度に隠蔽されていることを特徴とする飽和
ポリエステル樹脂製壜体。 In a single-resin-layer bottle made of a biaxially stretched blow-molded body made of a saturated polyester resin containing a colorant, only the portion of the bottom of the bottle located on the inner peripheral surface side of the bottle is coated with a crystallized resin layer formed by heat treatment. Furthermore, the whitening in the crystallized resin layer is hidden by the colored resin layer located outside the crystallized resin layer to such an extent that it cannot be visually recognized from the outside. Features a saturated polyester resin bottle.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP14012881U JPS5852108U (en) | 1981-09-21 | 1981-09-21 | Saturated polyester resin bottle body |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP14012881U JPS5852108U (en) | 1981-09-21 | 1981-09-21 | Saturated polyester resin bottle body |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPS5852108U JPS5852108U (en) | 1983-04-08 |
| JPH0123938Y2 true JPH0123938Y2 (en) | 1989-07-21 |
Family
ID=29933296
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP14012881U Granted JPS5852108U (en) | 1981-09-21 | 1981-09-21 | Saturated polyester resin bottle body |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPS5852108U (en) |
Families Citing this family (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH0788035B2 (en) * | 1986-05-26 | 1995-09-27 | 株式会社吉野工業所 | Primary molded product made of synthetic resin |
| JP6628513B2 (en) * | 2015-07-14 | 2020-01-08 | 株式会社吉野工業所 | Container manufacturing method |
| JP6628512B2 (en) * | 2015-07-14 | 2020-01-08 | 株式会社吉野工業所 | Container manufacturing method |
-
1981
- 1981-09-21 JP JP14012881U patent/JPS5852108U/en active Granted
Also Published As
| Publication number | Publication date |
|---|---|
| JPS5852108U (en) | 1983-04-08 |
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