JPH0356176B2 - - Google Patents
Info
- Publication number
- JPH0356176B2 JPH0356176B2 JP57127243A JP12724382A JPH0356176B2 JP H0356176 B2 JPH0356176 B2 JP H0356176B2 JP 57127243 A JP57127243 A JP 57127243A JP 12724382 A JP12724382 A JP 12724382A JP H0356176 B2 JPH0356176 B2 JP H0356176B2
- Authority
- JP
- Japan
- Prior art keywords
- layer
- hollow body
- cellophane
- outer layer
- hollow
- 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
- 229920000298 Cellophane Polymers 0.000 claims description 22
- 238000002844 melting Methods 0.000 claims description 5
- 230000008018 melting Effects 0.000 claims description 5
- 229920005992 thermoplastic resin Polymers 0.000 claims description 4
- 239000010410 layer Substances 0.000 description 51
- 239000012790 adhesive layer Substances 0.000 description 6
- 229920005989 resin Polymers 0.000 description 5
- 239000011347 resin Substances 0.000 description 5
- 230000037303 wrinkles Effects 0.000 description 4
- 230000004888 barrier function Effects 0.000 description 3
- 238000010438 heat treatment Methods 0.000 description 3
- 238000000034 method Methods 0.000 description 3
- 238000000465 moulding Methods 0.000 description 3
- 230000003746 surface roughness Effects 0.000 description 3
- 230000001070 adhesive effect Effects 0.000 description 2
- 238000007664 blowing Methods 0.000 description 2
- 230000000694 effects Effects 0.000 description 2
- 238000010101 extrusion blow moulding Methods 0.000 description 2
- 229920001903 high density polyethylene Polymers 0.000 description 2
- 239000004700 high-density polyethylene Substances 0.000 description 2
- 229920001684 low density polyethylene Polymers 0.000 description 2
- 239000004702 low-density polyethylene Substances 0.000 description 2
- 239000002356 single layer Substances 0.000 description 2
- 239000004743 Polypropylene Substances 0.000 description 1
- BZHJMEDXRYGGRV-UHFFFAOYSA-N Vinyl chloride Chemical compound ClC=C BZHJMEDXRYGGRV-UHFFFAOYSA-N 0.000 description 1
- 239000000853 adhesive Substances 0.000 description 1
- 230000015572 biosynthetic process Effects 0.000 description 1
- 230000000903 blocking effect Effects 0.000 description 1
- 238000004040 coloring Methods 0.000 description 1
- 239000000470 constituent Substances 0.000 description 1
- 239000002826 coolant Substances 0.000 description 1
- 238000001816 cooling Methods 0.000 description 1
- 239000002537 cosmetic Substances 0.000 description 1
- 230000002950 deficient Effects 0.000 description 1
- 235000013305 food Nutrition 0.000 description 1
- 238000010102 injection blow moulding Methods 0.000 description 1
- 238000010103 injection stretch blow moulding Methods 0.000 description 1
- 238000010030 laminating Methods 0.000 description 1
- 239000000463 material Substances 0.000 description 1
- 229920003023 plastic Polymers 0.000 description 1
- 239000004033 plastic Substances 0.000 description 1
- -1 polypropylene Polymers 0.000 description 1
- 229920001155 polypropylene Polymers 0.000 description 1
- 229920002994 synthetic fiber Polymers 0.000 description 1
- 229920003002 synthetic resin Polymers 0.000 description 1
- 239000000057 synthetic resin Substances 0.000 description 1
- 229920001169 thermoplastic Polymers 0.000 description 1
- 239000004416 thermosoftening plastic Substances 0.000 description 1
Landscapes
- Containers Having Bodies Formed In One Piece (AREA)
- Laminated Bodies (AREA)
Description
【発明の詳細な説明】
この発明は食品や化粧品などの容器として使用
される複層中空成形体に関するものである。DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a multilayer hollow molded body used as a container for foods, cosmetics, etc.
同質または異質の合成樹脂をもつて構成した複
層中空成形体は、単層の場合よりも諸効果にすぐ
れ、種々の容器として広く使用されつつある。し
かし従来の複層中空成形体では、その成形方法か
ら層間に印刷を施すことができず、また構成素材
のダイ内流動性に関する制約や成形により生じた
多量のバリの再利用が困難であるなどの問題があ
つた。 BACKGROUND OF THE INVENTION Multi-layer hollow molded bodies made of the same or different synthetic resins have better effects than single-layered bodies, and are being widely used as various containers. However, with conventional multilayer hollow molded bodies, printing cannot be performed between the layers due to the molding method, and there are also restrictions on the fluidity of the constituent materials within the die, and the difficulty of reusing the large amount of burrs generated during molding. There was a problem.
本発明者らは、上記従来の欠点が、複層パリソ
ンを複層中空成形体に吹込成形する点にあること
に気付き、他の手段を種々研究した結果、容器と
しての力学的性能の大部分を保証する中空体を成
形してのち、その中空体と外層を構成するフイル
ムとを接合することが最もよいことを見出したの
である。さらに中空成形体のガスバリヤ性向上、
印刷の容易性、光沢性、伸びなどからセロフアン
を外層のためのフイルムとして使用することが良
いことをも見出したのである。 The present inventors realized that the above-mentioned conventional drawback lies in the fact that the multilayer parison is blow-molded into a multilayer hollow molded body, and as a result of researching various other methods, it was found that most of the mechanical performance as a container is They discovered that it is best to mold a hollow body that guarantees the same and then bond the hollow body to the film that constitutes the outer layer. Furthermore, the gas barrier properties of the hollow molded body are improved.
They also discovered that it is good to use cellophane as a film for the outer layer because of its ease of printing, gloss, and elongation.
母体となる中空体は従来から一般に使用されて
いる成形方法、たとえば押出吹込成形方法、射出
吹込成形方法、射出延伸吹込成形方法などを用い
て製造されたものでよく、樹脂としては、高密度
ポリエチレンを始め塩化ビニール、ポリプロピレ
ンなど容器として使用されている樹脂のすべてを
適用させ得る。 The hollow body serving as the base body may be manufactured using a conventionally commonly used molding method, such as an extrusion blow molding method, an injection blow molding method, an injection stretch blow molding method, etc., and the resin is high density polyethylene. It can be applied to all resins used for containers, including vinyl chloride and polypropylene.
また上記セロフアンは、単層あるいは積層のい
ずれでもよく、積層もセロフアン同志に限定され
ず、熱可塑性樹脂のフイルムを積層したものでも
よい。この場合、熱可塑性樹脂は中空体を形成す
る樹脂と同質のものかまたは接着性の強いものが
好ましい。更にまた印刷層は、セロフアンが単層
のものでは内側、積層よりなるときには層間にそ
れぞれ設けられ、場合によつては複層化ののちに
外層表面に施してもよい。 Further, the above-mentioned cellophane may be either a single layer or a laminate, and the laminate is not limited to cellophane, and may be a laminate of thermoplastic resin films. In this case, the thermoplastic resin is preferably of the same quality as the resin forming the hollow body or one with strong adhesive properties. Furthermore, the printing layer may be provided on the inner side if the cellophane is a single layer, or between the layers if the cellophane is a laminated layer, or may be provided on the surface of the outer layer after multilayering as the case may be.
中空体形成層とセロフアンを主体とする外層と
の複層化は、予め準備された金型を使用して行わ
れる。金型は熱媒及び冷媒の通路を型部材内に有
するものがよい。また複層化に際する外層の形態
は、中空体の全部を覆う状態に形成されている場
合、中空体の胴部のみを取巻く状態に形成されて
いる場合、ラベルの如き状態にある場合などがあ
り、それらは目的に応じて任意に選択される。 Multilayering of the hollow body forming layer and the outer layer mainly composed of cellophane is performed using a mold prepared in advance. The mold preferably has passages for heat medium and coolant within the mold member. In addition, the form of the outer layer during multi-layering may be such as when it is formed to cover the entire hollow body, when it is formed to surround only the body of the hollow body, and when it is formed like a label. There are many options, and they can be selected arbitrarily depending on the purpose.
また上記金型内における複層化は加熱及び加圧
下において行われる。加熱のみにより中空体の外
層を溶融あるいは軟化して両者を一体的に接合
し、複層化しただけでは、中空体形成層と外層と
の密着が不完全となつて、仕上り状態が悪いばか
りか、外層に皺が生じ易く、多量の不良品が出来
る。 In addition, multilayering in the mold is performed under heating and pressure. If the outer layer of the hollow body is melted or softened by heating alone and the two are integrally joined to create a multilayer structure, the adhesion between the hollow body forming layer and the outer layer will be incomplete, and the finish will not only be poor. , the outer layer tends to wrinkle, resulting in a large number of defective products.
この皺の発生を防止するために、中空体を加圧
し膨脹させることが必要となる。型閉じ後におい
て中空体内に加えられた圧力は、中空体形成層を
外層と共にキヤビテイ面へと押圧する。しかもそ
の押圧は中空体形成層を押し拡げるように作用
し、外層は一緒に押し伸ばされながら中空体形成
層と接着する。 In order to prevent the occurrence of wrinkles, it is necessary to pressurize and expand the hollow body. The pressure applied within the hollow body after mold closure presses the hollow body forming layer together with the outer layer towards the cavity surface. Moreover, the pressure acts to spread the hollow body forming layer, and the outer layer is adhered to the hollow body forming layer while being pushed and stretched together.
上記内圧は、型閉じしたのちに中空体内に所要
気圧の空気を吹込むことにより容易に付与するこ
とができる。しかも金型内における中空体の膨脹
は均一であるから、複層化面積や形態に大きく左
右されず、中空体形成層とセロフアンを主体とす
る外層との複層化は常に確実となり、皺の発生も
生じ難い。 The above internal pressure can be easily applied by blowing air at the required pressure into the hollow body after the mold is closed. Moreover, since the hollow body expands uniformly within the mold, it is not greatly affected by the multilayer area or form, and the multilayer formation of the hollow body forming layer and the outer layer mainly made of cellophane is always ensured, thereby eliminating wrinkles. It is also difficult to occur.
更にこの発明を図面の例により詳説する。 Further, the present invention will be explained in detail with reference to the drawings.
図中１は複層中空成形体、２は熱可塑性樹脂に
よる中空体、３はセロフアン層３ａを主体とする
外層である。 In the figure, 1 is a multilayer hollow molded body, 2 is a hollow body made of thermoplastic resin, and 3 is an outer layer mainly composed of a cellophane layer 3a.
上記外層３は第２図に示すように、中空体形成
層２ａの表面にその中空体形成層２ａの溶融ある
いは軟化をもつて一体的に接合される場合と、第
３図に例示するように、接着層３ｂの溶融あるい
は軟化が加わることにより接合される場合とがあ
る。 As shown in FIG. 2, the outer layer 3 is integrally joined to the surface of the hollow body forming layer 2a by melting or softening the hollow body forming layer 2a, and as shown in FIG. In some cases, the bonding is performed by melting or softening the adhesive layer 3b.
上記外層３がセロフアン層３ａのみからなると
きには、セロフアン層３ａの内側、即ち接着面に
任意の印刷層３ｃを設けることができ、また接着
層３ｂを有する場合には、その接着層３ｂとセロ
フアン層３ａの間に印刷層３ｃが設けられる。更
にまた図は省略したが、複数枚のセロフアンフイ
ルムを多層に積層して外層３を構成したときに
は、そのセロフアンフイルムの間に印刷層を設け
ることもできる。 When the outer layer 3 consists only of the cellophane layer 3a, an arbitrary printed layer 3c can be provided on the inside of the cellophane layer 3a, that is, on the adhesive surface, and when it has an adhesive layer 3b, the adhesive layer 3b and the cellophane layer A printing layer 3c is provided between the layers 3a. Furthermore, although not shown in the drawings, when the outer layer 3 is constructed by laminating a plurality of cellophane films in multiple layers, a printing layer may be provided between the cellophane films.
このセロフアンフイルムの多層化によつて外層
３におけるガスバリヤ性は一段と向上する。また
印刷層３ｃは内容物の表示以外にも、中空体２が
透明なときには、遮光の目的をもつて設けてもよ
く、セロフアンフイルムを着色して遮光を行つた
ときと同じような効果を奏する。 By making the cellophane film multi-layered, the gas barrier properties of the outer layer 3 are further improved. In addition to displaying the contents, the printing layer 3c may also be provided for the purpose of blocking light when the hollow body 2 is transparent, and it can provide the same effect as when coloring a cellophane film to block light. play.
上記外層３における接着層３ｂは、中空体２を
構成する樹脂と同一の樹脂によるのが好ましい。
このときには中空体形成層２ａと接着層３ｂとの
溶融あるいは軟化に相互の結付きが一層確実とな
るからである。 The adhesive layer 3b in the outer layer 3 is preferably made of the same resin as the resin constituting the hollow body 2.
This is because at this time, the mutual bonding of the hollow body forming layer 2a and the adhesive layer 3b by melting or softening becomes more reliable.
上述のように、中空体形成層２ａとの接合によ
り中空体２の外層３を構成するセロフアン層３ａ
は、セロフアンフイルムによる多層化が可能であ
り、内層印刷は勿論のこと後印刷も容易にでき、
ガスバリヤ性にも優り、光沢もよく、合成のよう
に帯電することもないなどの利点を有する。 As mentioned above, the cellophane layer 3a that constitutes the outer layer 3 of the hollow body 2 by bonding with the hollow body forming layer 2a
can be multi-layered using cellophane film, making it easy to print on the inner layer as well as after printing.
It has advantages such as excellent gas barrier properties, good gloss, and does not get charged unlike synthetic materials.
以下に実施例を示して本発明をさらに詳細に説
明する。 The present invention will be explained in more detail by showing Examples below.
実施例
密度0.945ｇ／cm3、溶融指数0.3ｇ／minの高密
度ポリエチレンを使用して、50mmφ押出中空成形
機にて容量300c.c.の丸瓶を成形した。Example Using high-density polyethylene with a density of 0.945 g/cm 3 and a melting index of 0.3 g/min, a round bottle with a capacity of 300 c.c. was molded using a 50 mmφ extrusion blow molding machine.
予め準備しておいたセロフアン複層フイルム
（セロフアン30μ厚／印刷層／低密度ポリエチレ
ン50μ厚）で、低密度ポリエチレン層側を内側に
して瓶胴部を包み、再度金型内に装着した。金型
を熱媒により130℃まで加熱すると同時に瓶口部
よりブロー圧に等しい５Kg／cm2の圧力を加えた。 The bottle body was wrapped with the cellophane multilayer film prepared in advance (cellophane 30 μm thick/printed layer/low density polyethylene 50 μm thick) with the low density polyethylene layer side facing inside, and the bottle was placed in the mold again. The mold was heated to 130° C. using a heating medium, and at the same time a pressure of 5 kg/cm 2 equal to the blowing pressure was applied from the bottle mouth.
冷却固化を待つて取出された丸瓶の胴部は、セ
ロフアン自体が熱可塑性ではないにも拘わらず、
皺の発生がなく、またフイルム層と母体となる瓶
表面との間に空気や泡も残らず、光沢のよいもの
得られた。さらに母体の瓶の表面粗さ（JIS
BO601）は、1.8μであつたが複層化した部分の表
面粗さは0.2μとなり、極めて平滑であつた。 The body of the round bottle, which was taken out after cooling and solidifying, was made of plastic, even though the cellophane itself is not thermoplastic.
There were no wrinkles, no air or bubbles remained between the film layer and the base bottle surface, and a product with good gloss was obtained. In addition, the surface roughness of the base bottle (JIS
BO601) had a surface roughness of 1.8μ, but the surface roughness of the multilayered portion was 0.2μ, which was extremely smooth.
図面はこの発明に係る複層中空成形体を例示す
るもので、第１図は一部縦断正面図、第２図及び
第３図は複層化状態を示す部分断面図である。
１…複層中空成形体、２…中空体、２ａ…中空
体形成層、３…外層、３ａ…セロフアン層、３ｂ
…接着層、３ｃ…印刷層。
The drawings illustrate a multilayer hollow molded body according to the present invention, and FIG. 1 is a partially vertical front view, and FIGS. 2 and 3 are partial sectional views showing a multilayered state. DESCRIPTION OF SYMBOLS 1... Multilayer hollow molded body, 2... Hollow body, 2a... Hollow body forming layer, 3... Outer layer, 3a... Cellophane layer, 3b
...adhesive layer, 3c...printing layer.
Claims (1)
の溶融あるいは軟化により接合したセロフアンに
より構成した複層中空成形体。1. A multilayer hollow molded body in which the outer layer of a thermoplastic resin hollow body is made of cellophane bonded by melting or softening the hollow body.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP57127243A JPS5916741A (en) | 1982-07-21 | 1982-07-21 | Double-layer hollow shape |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP57127243A JPS5916741A (en) | 1982-07-21 | 1982-07-21 | Double-layer hollow shape |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPS5916741A JPS5916741A (en) | 1984-01-27 |
| JPH0356176B2 true JPH0356176B2 (en) | 1991-08-27 |
Family
ID=14955242
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP57127243A Granted JPS5916741A (en) | 1982-07-21 | 1982-07-21 | Double-layer hollow shape |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPS5916741A (en) |
-
1982
- 1982-07-21 JP JP57127243A patent/JPS5916741A/en active Granted
Also Published As
| Publication number | Publication date |
|---|---|
| JPS5916741A (en) | 1984-01-27 |
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