JPH03111261A - Gas-barrier cap and its molding method - Google Patents
Gas-barrier cap and its molding methodInfo
- Publication number
- JPH03111261A JPH03111261A JP1245721A JP24572189A JPH03111261A JP H03111261 A JPH03111261 A JP H03111261A JP 1245721 A JP1245721 A JP 1245721A JP 24572189 A JP24572189 A JP 24572189A JP H03111261 A JPH03111261 A JP H03111261A
- Authority
- JP
- Japan
- Prior art keywords
- liquid crystal
- crystal resin
- cap
- cap body
- thermoplastic liquid
- 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.)
- Pending
Links
- 238000000034 method Methods 0.000 title claims abstract description 8
- 238000000465 moulding Methods 0.000 title description 4
- 229920005989 resin Polymers 0.000 claims abstract description 44
- 239000011347 resin Substances 0.000 claims abstract description 44
- 239000004973 liquid crystal related substance Substances 0.000 claims abstract description 32
- 229920001169 thermoplastic Polymers 0.000 claims abstract description 25
- 239000004416 thermosoftening plastic Substances 0.000 claims abstract description 25
- 230000004888 barrier function Effects 0.000 claims abstract description 12
- 238000004519 manufacturing process Methods 0.000 claims abstract description 6
- FJKROLUGYXJWQN-UHFFFAOYSA-N 4-hydroxybenzoic acid Chemical compound OC(=O)C1=CC=C(O)C=C1 FJKROLUGYXJWQN-UHFFFAOYSA-N 0.000 abstract description 10
- 238000001746 injection moulding Methods 0.000 abstract description 10
- -1 polyethylene Polymers 0.000 abstract description 7
- 239000004743 Polypropylene Substances 0.000 abstract description 5
- 229920001577 copolymer Polymers 0.000 abstract description 5
- 239000000463 material Substances 0.000 abstract description 5
- 239000004698 Polyethylene Substances 0.000 abstract description 3
- 239000007788 liquid Substances 0.000 abstract description 3
- 229920000573 polyethylene Polymers 0.000 abstract description 3
- 229920005992 thermoplastic resin Polymers 0.000 abstract description 3
- UPHOPMSGKZNELG-UHFFFAOYSA-N 2-hydroxynaphthalene-1-carboxylic acid Chemical compound C1=CC=C2C(C(=O)O)=C(O)C=CC2=C1 UPHOPMSGKZNELG-UHFFFAOYSA-N 0.000 abstract description 2
- 229920000515 polycarbonate Polymers 0.000 abstract description 2
- 239000004417 polycarbonate Substances 0.000 abstract description 2
- 229920000728 polyester Polymers 0.000 abstract description 2
- 229920000379 polypropylene carbonate Polymers 0.000 abstract description 2
- OBOXTJCIIVUZEN-UHFFFAOYSA-N [C].[O] Chemical compound [C].[O] OBOXTJCIIVUZEN-UHFFFAOYSA-N 0.000 abstract 2
- 239000007789 gas Substances 0.000 description 9
- 238000002347 injection Methods 0.000 description 9
- 239000007924 injection Substances 0.000 description 9
- LYCAIKOWRPUZTN-UHFFFAOYSA-N Ethylene glycol Chemical compound OCCO LYCAIKOWRPUZTN-UHFFFAOYSA-N 0.000 description 6
- KKEYFWRCBNTPAC-UHFFFAOYSA-N Terephthalic acid Chemical compound OC(=O)C1=CC=C(C(O)=O)C=C1 KKEYFWRCBNTPAC-UHFFFAOYSA-N 0.000 description 4
- 229940090248 4-hydroxybenzoic acid Drugs 0.000 description 3
- QVGXLLKOCUKJST-UHFFFAOYSA-N atomic oxygen Chemical compound [O] QVGXLLKOCUKJST-UHFFFAOYSA-N 0.000 description 3
- 229910052760 oxygen Inorganic materials 0.000 description 3
- 239000001301 oxygen Substances 0.000 description 3
- 239000002985 plastic film Substances 0.000 description 3
- 229920001155 polypropylene Polymers 0.000 description 3
- 230000001954 sterilising effect Effects 0.000 description 3
- 238000004659 sterilization and disinfection Methods 0.000 description 3
- KAUQJMHLAFIZDU-UHFFFAOYSA-N 6-Hydroxy-2-naphthoic acid Chemical compound C1=C(O)C=CC2=CC(C(=O)O)=CC=C21 KAUQJMHLAFIZDU-UHFFFAOYSA-N 0.000 description 2
- CURLTUGMZLYLDI-UHFFFAOYSA-N Carbon dioxide Chemical compound O=C=O CURLTUGMZLYLDI-UHFFFAOYSA-N 0.000 description 2
- WPYMKLBDIGXBTP-UHFFFAOYSA-N benzoic acid Chemical compound OC(=O)C1=CC=CC=C1 WPYMKLBDIGXBTP-UHFFFAOYSA-N 0.000 description 2
- 239000011888 foil Substances 0.000 description 2
- 239000002184 metal Substances 0.000 description 2
- 239000000203 mixture Substances 0.000 description 2
- 239000000123 paper Substances 0.000 description 2
- 229920006255 plastic film Polymers 0.000 description 2
- QGNLHMKIGMZKJX-UHFFFAOYSA-N 3-chloro-4-hydroxybenzoic acid Chemical compound OC(=O)C1=CC=C(O)C(Cl)=C1 QGNLHMKIGMZKJX-UHFFFAOYSA-N 0.000 description 1
- 239000005711 Benzoic acid Substances 0.000 description 1
- OKTJSMMVPCPJKN-UHFFFAOYSA-N Carbon Chemical compound [C] OKTJSMMVPCPJKN-UHFFFAOYSA-N 0.000 description 1
- 229920001328 Polyvinylidene chloride Polymers 0.000 description 1
- 239000002253 acid Substances 0.000 description 1
- 235000010233 benzoic acid Nutrition 0.000 description 1
- 229910052799 carbon Inorganic materials 0.000 description 1
- 239000001569 carbon dioxide Substances 0.000 description 1
- 229910002092 carbon dioxide Inorganic materials 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 239000005038 ethylene vinyl acetate Substances 0.000 description 1
- 229920001200 poly(ethylene-vinyl acetate) Polymers 0.000 description 1
- 229920000139 polyethylene terephthalate Polymers 0.000 description 1
- 239000005020 polyethylene terephthalate Substances 0.000 description 1
- 239000005033 polyvinylidene chloride Substances 0.000 description 1
- YQUVCSBJEUQKSH-UHFFFAOYSA-N protochatechuic acid Natural products OC(=O)C1=CC=C(O)C(O)=C1 YQUVCSBJEUQKSH-UHFFFAOYSA-N 0.000 description 1
- 238000001179 sorption measurement Methods 0.000 description 1
- WKOLLVMJNQIZCI-UHFFFAOYSA-N vanillic acid Chemical compound COC1=CC(C(O)=O)=CC=C1O WKOLLVMJNQIZCI-UHFFFAOYSA-N 0.000 description 1
- TUUBOHWZSQXCSW-UHFFFAOYSA-N vanillic acid Natural products COC1=CC(O)=CC(C(O)=O)=C1 TUUBOHWZSQXCSW-UHFFFAOYSA-N 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
- B29C45/00—Injection moulding, i.e. forcing the required volume of moulding material through a nozzle into a closed mould; Apparatus therefor
- B29C45/16—Making multilayered or multicoloured articles
-
- 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
- B29K2105/00—Condition, form or state of moulded material or of the material to be shaped
- B29K2105/0079—Liquid crystals
-
- 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
- B29K2995/00—Properties of moulding materials, reinforcements, fillers, preformed parts or moulds
- B29K2995/0037—Other properties
- B29K2995/0065—Permeability to gases
- B29K2995/0067—Permeability to gases non-permeable
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
- B29L—INDEXING SCHEME ASSOCIATED WITH SUBCLASS B29C, RELATING TO PARTICULAR ARTICLES
- B29L2031/00—Other particular articles
- B29L2031/26—Sealing devices, e.g. packaging for pistons or pipe joints
- B29L2031/265—Packings, Gaskets
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
- B29L—INDEXING SCHEME ASSOCIATED WITH SUBCLASS B29C, RELATING TO PARTICULAR ARTICLES
- B29L2031/00—Other particular articles
- B29L2031/56—Stoppers or lids for bottles, jars, or the like, e.g. closures
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
- B29L—INDEXING SCHEME ASSOCIATED WITH SUBCLASS B29C, RELATING TO PARTICULAR ARTICLES
- B29L2031/00—Other particular articles
- B29L2031/56—Stoppers or lids for bottles, jars, or the like, e.g. closures
- B29L2031/565—Stoppers or lids for bottles, jars, or the like, e.g. closures for containers
Abstract
Description
【発明の詳細な説明】
（産業上の利用分野）
本発明は熱可塑性液晶樹脂を利用した酸素バリヤー性キ
ャップと成型品の製造方法に関する。DETAILED DESCRIPTION OF THE INVENTION (Field of Industrial Application) The present invention relates to a method for manufacturing an oxygen barrier cap and a molded product using a thermoplastic liquid crystal resin.
（従来の技術）
熱可塑性液晶樹脂は液体状態においても配向性を示す樹
脂で、このため、耐熱性、酸素や炭酸ガス等のガスバリ
ヤ−性、寸法安定性、低熱膨張性、低収縮性に優れてい
る。たま、エチレン−酢酸ビニル共重合体ケン化物やポ
リ塩化ビニリデン等の他のガスバリヤ−性樹脂と異なり
、水分の吸着によるガスバリヤ−性の劣化も生じない。(Prior art) Thermoplastic liquid crystal resin is a resin that exhibits orientation even in the liquid state, and therefore has excellent heat resistance, gas barrier properties against oxygen and carbon dioxide, dimensional stability, low thermal expansion, and low shrinkage. ing. Additionally, unlike other gas barrier resins such as saponified ethylene-vinyl acetate copolymer and polyvinylidene chloride, the gas barrier properties do not deteriorate due to moisture adsorption.
このように、熱可塑性液晶樹脂はガスバリヤ−性樹脂と
して優れている。しかし、この樹脂は高価なため、他の
安価な樹脂と共押出し成形して、ガスバリヤ−の成型物
を得る方法が提案されている（特開昭６２−１８７０３
３号公報）。Thus, thermoplastic liquid crystal resins are excellent as gas barrier resins. However, since this resin is expensive, a method has been proposed in which a gas barrier molded product is obtained by coextrusion molding with other inexpensive resins (Japanese Patent Laid-Open No. 18703/1983).
Publication No. 3).
（発明が解決しようとする課題）
しかし、熱可塑性液晶樹脂は溶融時に特殊な流動挙動を
示すため、共押出しできる樹脂は特定のものに限られて
いた０例えば、熱可塑性液晶樹脂とポリエチレン又はポ
リプロピレンと共押出成形することは困難であり、事実
上不可能なのである。(Problem to be solved by the invention) However, since thermoplastic liquid crystal resin exhibits special flow behavior when melted, the resins that can be coextruded are limited to specific ones. For example, thermoplastic liquid crystal resin and polyethylene or polypropylene Coextrusion molding is difficult and virtually impossible.
そこで、本発明は、任意の材質のキャップ本体に薄い熱
可塑性液晶樹脂層を設けることができる方法と、得られ
るキャップを提供することを目的とする。SUMMARY OF THE INVENTION Therefore, an object of the present invention is to provide a method for providing a thin thermoplastic liquid crystal resin layer on a cap body made of an arbitrary material, and to provide a cap obtained.
（課題を解決するための手段）
この目的を達成するため、請求項（１）の発明は、キャ
ンプ本体の内面に、熱可塑性液晶樹脂層を設けて成るガ
スバリヤ−性キャップを提供する。(Means for Solving the Problems) To achieve this object, the invention of claim (1) provides a gas barrier cap comprising a thermoplastic liquid crystal resin layer provided on the inner surface of a camp body.
また、請求項（２）の発明は、成型品本体の表面に、空
隙を介してコア側金型を当接し、この空隙に熱可塑性液
晶樹脂を射出して一体化することを特徴とする成型品の
製造方法を提供する。成型品本体とは例えばキャップ本
体であり、成型品とは例えばキャップである。Further, the invention of claim (2) is characterized in that a core-side mold is brought into contact with the surface of the molded product body through a gap, and a thermoplastic liquid crystal resin is injected into the gap to integrate the molded product. provide a manufacturing method for the product. The molded product body is, for example, a cap body, and the molded product is, for example, a cap.
（発明の詳細な説明）
本発明に係るキャップ本体は任意の材質から成るもので
良い０例えば、ポリエチレン、ポリプロピレン、ポリカ
ーボネート等の熱可塑性樹脂の射出成型物であって良い
。あるいはまた紙やプラスチックフィルム又は金属箔を
基材とするラベルを金型内に！！置し、上記樹脂を射出
してラベルと一体に成型したものでも良い。所望ならば
、紙、プラスチックフィルム又はシート、金属箔又はこ
れらの積層物から成型したものでも良い。(Detailed Description of the Invention) The cap body according to the present invention may be made of any material; for example, it may be an injection molded product of a thermoplastic resin such as polyethylene, polypropylene, or polycarbonate. Or put a label based on paper, plastic film or metal foil inside the mold! ! It may also be one in which the label is placed and the resin is injected and molded integrally with the label. If desired, it may be molded from paper, plastic film or sheet, metal foil, or laminates thereof.
また、本発明に係る熱可塑性液晶樹脂は液体状態で配向
性を有するもので、ポリエステル系液晶樹脂が知られて
いる。すなわち、ヒドロキシナフトインクアシッドとヒ
ドロキシベンゾイックアシッドとの共重合物、ヒドロキ
シベンゾイックアシッドとエチレングリコールとテレフ
タール酸の共重合物等である。なお、ヒドロキシナフト
イックアシッドとしては２−ヒドロキシ−６−ナフトエ
酸、ヒドロキシベンゾイックアシッドとしては、４−ヒ
ドロキシ−３−クロロ安息香酸、バニリン酸、バラヒド
ロキシ安息香酸、あるいは４−ヒドロキシ−３−メチル
安息香酸等が例示できる０本発明においては、これらは
いずれも使用でき、これらのうちの２種類以上の混合物
であっても良い。Further, the thermoplastic liquid crystal resin according to the present invention has orientation properties in a liquid state, and polyester liquid crystal resins are known. That is, they include a copolymer of hydroxynaphthoin acid and hydroxybenzoic acid, a copolymer of hydroxybenzoic acid, ethylene glycol, and terephthalic acid, and the like. The hydroxynaphthoic acid is 2-hydroxy-6-naphthoic acid, and the hydroxybenzoic acid is 4-hydroxy-3-chlorobenzoic acid, vanillic acid, parahydroxybenzoic acid, or 4-hydroxy-3-methyl. Examples include benzoic acid. In the present invention, any of these can be used, and a mixture of two or more of them may be used.
また、ポリエチレンテレフタレート等の他の熱可塑性樹
脂を添加混合した物であっても良い。Further, it may be a mixture of other thermoplastic resins such as polyethylene terephthalate.
熱可塑性液晶樹脂層はキャップ本体の内面に設けられる
。内面とは容器に当接する側の面である。A thermoplastic liquid crystal resin layer is provided on the inner surface of the cap body. The inner surface is the side that comes into contact with the container.
第１図及び第２図は本発明のキャップの例を示す断面図
で、（１）はキャップ本体、（２）は熱可塑性液晶樹脂
層である。熱可塑性液晶樹脂層（２）は０．３ｍｍの厚
さがあれば十分である。FIGS. 1 and 2 are cross-sectional views showing an example of the cap of the present invention, in which (1) is the cap body and (2) is the thermoplastic liquid crystal resin layer. A thickness of 0.3 mm is sufficient for the thermoplastic liquid crystal resin layer (2).
また樹脂が高価なため、１ｍｍ以下の厚さで良い。Further, since the resin is expensive, the thickness may be 1 mm or less.
キャップ本体（１）が熱可塑性液晶樹脂層（２）と接着
し難い材質の場合には、第２図に示すように、キャップ
本体（１）の内面に逆テーパー形状を有する凹部（ａ）
を設け、熱可塑性液晶樹脂層（２）の突起と嵌合させれ
ば良い。凹部（ａ）は必要に応じて複数設けることがで
きる。If the cap body (1) is made of a material that is difficult to adhere to the thermoplastic liquid crystal resin layer (2), as shown in FIG.
may be provided and fitted with the protrusion of the thermoplastic liquid crystal resin layer (2). A plurality of recesses (a) can be provided as necessary.
熱可塑性液晶樹脂層（２）は、第３図に示すような方法
で設けることができる。すなわち、キャップ本体（１）
の内面に、空隙（４）を介して金型（３）を当接し、こ
の空隙に熱可塑性液晶樹脂（２）を射出する。The thermoplastic liquid crystal resin layer (2) can be provided by a method as shown in FIG. That is, the cap body (1)
A mold (3) is brought into contact with the inner surface of the mold through a gap (4), and a thermoplastic liquid crystal resin (2) is injected into the gap.
液晶樹脂は、第４図に示すように、高いシェア比におい
て粘度が低い、ここで、シェア比は、射出キャビティの
厚さ方向の距離（Ｔ）で樹脂速度（Ｖ）を微分した値（
ｄ ｖ ／ ｄ Ｔ ）である、なお、比較のため、汎
用の樹脂のシェア比と見掛けの粘度との関係を第４図に
示す。As shown in Figure 4, the viscosity of liquid crystal resin is low when the shear ratio is high. Here, the shear ratio is the value obtained by differentiating the resin velocity (V) with the distance (T) in the thickness direction of the injection cavity (
d v / d T ).For comparison, FIG. 4 shows the relationship between the shear ratio and the apparent viscosity of a general-purpose resin.
また、樹脂の流動長しとキャビティの厚み（Ｔ）の比（
Ｌ／Ｔ）と、射出速度の比を第５図に示す。Also, the ratio of resin flow length to cavity thickness (T) (
FIG. 5 shows the ratio of L/T) and injection speed.
図から分かるように、高速度でＬ／Ｔが大きくなり、空
隙（４）が狭くても十分に射出成形できる。As can be seen from the figure, L/T increases at high speeds, and sufficient injection molding is possible even if the gap (4) is narrow.
例えば、径１００ｍｍのキャップ本体に、厚さ０゜３ｍ
ｍの液晶樹脂層（２）を設けることができる。For example, a cap body with a diameter of 100mm has a thickness of 0°3m.
m liquid crystal resin layers (2) can be provided.
なお、キャップ本体（１）が射出成形物である場合は、
キャップ本体（１）を射出成形した後、金型（３）を移
動させて空隙（４）を設け、引き続いて液晶樹脂（２）
を射出成形することができる。あるいはコア側金型（金
型（３）の反対側の金型）を抜き、別のコア側金型を当
接して液晶樹脂（２）を射出成形しても良い。In addition, if the cap body (1) is an injection molded product,
After injection molding the cap body (1), the mold (3) is moved to create a gap (4), and then the liquid crystal resin (2) is molded.
can be injection molded. Alternatively, the liquid crystal resin (2) may be injection molded by removing the core side mold (the mold on the opposite side of the mold (3)) and abutting another core side mold.
（実施例１）
型締カフ５ｔｏｎの射出成形機により、ポリプロピレン
樹脂を射出成型して、キャップ本体を製造した。キャッ
プ本体は第２図に示す形状で、径１００ｍｍである。射
出成形はバレル温度２２０〜２４０°Ｃ１ノズル温度２
４０℃で行なった。(Example 1) A cap body was manufactured by injection molding polypropylene resin using a 5 ton injection molding machine. The cap body has the shape shown in FIG. 2 and has a diameter of 100 mm. For injection molding, barrel temperature 220-240°C1 nozzle temperature2
It was carried out at 40°C.
得られたキャップ本体を型締力５０ｔｏｎの他の射出成
形機に設置した。コア側金型とキャップ本体との間を０
．３ｍｍに設置し、この空隙に、パラヒドロキシ安息香
酸と２−ヒドロキシ−６−ナフトエ酸の共重合体から成
る熱可塑性液晶樹脂を射出した。射出成形はバレル温度
３１０〜３２０°Ｃ、ノズル温度３２０ ’Ｃで行なっ
た。The obtained cap body was installed in another injection molding machine with a mold clamping force of 50 tons. 0 between the core side mold and the cap body
．． A thermoplastic liquid crystal resin made of a copolymer of parahydroxybenzoic acid and 2-hydroxy-6-naphthoic acid was injected into this gap. Injection molding was carried out at a barrel temperature of 310-320°C and a nozzle temperature of 320'C.
（実施例２） 二色射出成型機を用いた。(Example 2) A two-color injection molding machine was used.
実施例１に記載の方法でポリプロピレンをキャップ本体
に成型した後、コア側金型を移動させて０．３ｍｍの空
隙を設け、金型全体をもう１つの射出ユニットに移動さ
せた。射出ノズルから、バラヒドロキシ安息香酸とエチ
レングリコールとテレフタール酸の共重合体から成る熱
可塑性液晶樹脂を射出した。射出成形は、バレル温度２
４０〜２６０°Ｃ、ノズル温度２６０ ”Ｃで行なった
。After molding polypropylene into a cap body using the method described in Example 1, the core side mold was moved to create a gap of 0.3 mm, and the entire mold was moved to another injection unit. A thermoplastic liquid crystal resin consisting of a copolymer of parahydroxybenzoic acid, ethylene glycol, and terephthalic acid was injected from an injection nozzle. For injection molding, barrel temperature 2
It was carried out at a temperature of 40-260°C and a nozzle temperature of 260''C.
（効果）
請求項（１）記載の発明によれば、水分の存否に係わら
ず、酸素や炭素ガス等のガスバリヤ−性に優れたキャッ
プを安価に得ることができる。かかるキャップは、ボイ
ル殺菌又はレトルト殺菌等の温熱殺菌処理を施す容器の
キャップに最適である。(Effects) According to the invention described in claim (1), it is possible to obtain a cap with excellent gas barrier properties against oxygen, carbon gas, etc., at a low cost, regardless of the presence or absence of moisture. Such a cap is most suitable as a cap for a container subjected to thermal sterilization treatment such as boil sterilization or retort sterilization.
また請求項（２）記載の発明によれば、任意の材質の成
型品本体に熱可塑性液晶樹脂を積層一体化することがで
きる。液晶樹脂は極めて薄い層に形成できるから、ガス
バリヤ−性に優れた成型品を安価に製造できる。Further, according to the invention described in claim (2), the thermoplastic liquid crystal resin can be laminated and integrated on the molded product body made of any material. Since liquid crystal resin can be formed into an extremely thin layer, molded products with excellent gas barrier properties can be manufactured at low cost.
第１図及び第２図は本発明に係るキャップの例を示す断
面図、第３図は製造方法を示す説明図、第４図はシェア
比と粘度の関係を示すグラフ、第５図は射出速度と成形
性の関係を示すグラフである。
（１）・・・・キャップ本体
（２）・・・・熱可塑性液晶樹脂
（３）・・・・金型
（４）・・・・空隙
特
許 出 願 人
凸版印刷株式会社
代表者 鈴木和夫
１蟹（禁ぐＫ）
且Figures 1 and 2 are cross-sectional views showing examples of caps according to the present invention, Figure 3 is an explanatory view showing the manufacturing method, Figure 4 is a graph showing the relationship between shear ratio and viscosity, and Figure 5 is an injection It is a graph showing the relationship between speed and formability. (1) Cap body (2) Thermoplastic liquid crystal resin (3) Mold (4) Air gap patent Applicant Toppan Printing Co., Ltd. Representative Kazuo Suzuki 1 Crab (forbidden K) and
Claims (2)
けて成るガスバリヤー性キャップ。(1) A gas barrier cap consisting of a thermoplastic liquid crystal resin layer provided on the inner surface of the cap body.
、この空隙に熱可塑性液晶樹脂を射出して一体化するこ
とを特徴とする成型品の製造方法。(2) A method for manufacturing a molded product, which comprises bringing a mold into contact with the surface of the molded product body through a gap, and injecting a thermoplastic liquid crystal resin into the gap to integrate the molded product.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP1245721A JPH03111261A (en) | 1989-09-21 | 1989-09-21 | Gas-barrier cap and its molding method |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP1245721A JPH03111261A (en) | 1989-09-21 | 1989-09-21 | Gas-barrier cap and its molding method |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JPH03111261A true JPH03111261A (en) | 1991-05-13 |
Family
ID=17137816
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP1245721A Pending JPH03111261A (en) | 1989-09-21 | 1989-09-21 | Gas-barrier cap and its molding method |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPH03111261A (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH0699998A (en) * | 1992-09-16 | 1994-04-12 | Toyo Seikan Kaisha Ltd | Resin cap |
| WO2008034733A1 (en) * | 2006-09-22 | 2008-03-27 | Fischbach Kg Kunststoff-Technik | Packaging container and method of producing the same |
-
1989
- 1989-09-21 JP JP1245721A patent/JPH03111261A/en active Pending
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH0699998A (en) * | 1992-09-16 | 1994-04-12 | Toyo Seikan Kaisha Ltd | Resin cap |
| WO2008034733A1 (en) * | 2006-09-22 | 2008-03-27 | Fischbach Kg Kunststoff-Technik | Packaging container and method of producing the same |
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