JP5115919B2 - Surface decoration method for synthetic resin tube - Google Patents

Surface decoration method for synthetic resin tube Download PDF

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JP5115919B2
JP5115919B2 JP2007022207A JP2007022207A JP5115919B2 JP 5115919 B2 JP5115919 B2 JP 5115919B2 JP 2007022207 A JP2007022207 A JP 2007022207A JP 2007022207 A JP2007022207 A JP 2007022207A JP 5115919 B2 JP5115919 B2 JP 5115919B2
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decorative layer
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忠克 高村
覚久 椋本
雅文 日野
保幸 今泉
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Yoshino Kogyosho Co Ltd
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Description

本発明は、合成樹脂の押出成形品であるチューブ体の表面加飾方法に関するものであり、特に成形により外表面に凹凸模様を形成する方法に関する。   The present invention relates to a method for decorating the surface of a tube body which is an extruded product of a synthetic resin, and more particularly to a method for forming a concavo-convex pattern on an outer surface by molding.

たとえば特許文献1には、木目調模様を有する多層ブロー成形品を連続的に安定して安価に生産するためのダイス及びブロー成形方法に係る記載があり、着色層の流路に、着色層樹脂の流入を制限する櫛歯状遮断手段、あるいはダム状遮断手段を配設した多層ブロー成形用ダイスを用いた成形方法が記載されている。
特開平11−48321号公報
For example, Patent Document 1 has a description relating to a die and a blow molding method for continuously and inexpensively producing a multilayer blow molded product having a woodgrain pattern, and a colored layer resin is provided in a flow path of the colored layer. Describes a molding method using a multi-layer blow molding die provided with comb-like blocking means or dam-shaped blocking means for restricting inflow of dams.
JP 11-48321 A

本発明は、押出成形品であるチューブ体の外表面に木目調のような多様な模様を色調だけでなく、凹凸によって現出する方法を創出することを課題とし、視覚的には凹凸による陰影が現出し、指先等を触れることにより触感的にも凹凸が十分に認識される今までにない加飾効果を有するチューブ容器を提供することを目的とする。   An object of the present invention is to create a method of displaying various patterns such as wood grain on the outer surface of a tube body, which is an extrusion-molded product, not only by color tone but also by unevenness. An object of the present invention is to provide a tube container having an unprecedented decorative effect in which irregularities are sufficiently recognized even by tactile sensation by touching a fingertip or the like.

上記技術的課題を解決する本発明の内、請求項1記載の発明の方法は、
合成樹脂製チューブ体の表面加飾方法であって、
少なくとも、基体層を形成する円環状基体層流路とこの基体層の外側に加飾層を形成する円環状の加飾層流路を有する多層共押出し成形用ダイスを用い、基体層に加飾層を積層したチューブ体を引取機により伸張させながら成形する方法において、
加飾層を形成する加飾層樹脂には、MIが1.0g/10分以下の範囲であるポリエチレン樹脂、若しくはMFRが1.0g/10分以下の範囲であるポリプロピレン樹脂を使用すること、
加飾層流路における、円環状基体層流路への合流点直前部分に流路クリアランスを周期状に遮断する遮断リングを配設すること、
加飾層樹脂の溶融粘度と、遮断リングによる加飾層流路の周期状の断と、引取機による引取速度の組み合わせにより合流点における加飾層と基体層との積層界面で加飾層に流動乱れを発生せしめると共に、ダイス出口における、ダイスエル効果と引取機による伸張効果により加飾層樹脂を突条状に変形せしめ、成形品外表面に凹凸模様を形成すること、
にある。
Among the present invention for solving the above technical problems, the method of the invention according to claim 1 comprises:
A surface decoration method for a synthetic resin tube body,
At least, a multilayer co-extrusion die having a decorative layer flow path of annular forming a decorative layer on the outside of the annular base layer channel and the base layer forming the substrate layer, decorative the substrate layer In a method of forming a tube body in which layers are laminated while being stretched by a take-up machine,
For the decorative layer resin forming the decorative layer , use a polyethylene resin having an MI of 1.0 g / 10 min or less, or a polypropylene resin having an MFR of 1.0 g / 10 min or less ,
Disposing a blocking ring that periodically blocks the flow path clearance in the decorative layer flow path, immediately before the merging point to the annular base layer flow path,
And the melt viscosity of the decorative layer resin, and the cycle-like barrier break of the decorative layer flow path by the blocking ring, a combination of take-off speed by the take-up device, decorative in lamination interface between the decorative layer and the substrate layer in converging together allowed to generate a flow disturbance in the layer, that the die exit, a decorative layer resin deform the ridge shape by stretching effect due to die swell effect and the take-up device, to form a concave convex pattern in the molded article outer surface,
It is in.

本願発明者らは、チューブ体の押出し成形においてさまざまな成形条件で着色した加飾層による加飾効果を検討をする中で、薄肉に積層する場合に加飾層樹脂の流動態様が合流点で多様に変動し、基体層との積層界面で加飾層の流動状態に大きな乱れが発生し、この加飾層の流動状態の乱れに起因する色調変化に係る多様な模様を現出できること、
また、遮断手段で加飾層流路の合流点直前部分の流路クリアランスを周期状に遮断する実験を行うと、高い溶融粘度(以下、高粘度と記す。)の樹脂の場合には溶融樹脂の流動を完全には遮断できず、さらにダイス出口でダイスエル効果が発揮され、引取機による伸張効果が相俟って、上記した積層界面での加飾層の流動状態の大きな乱れに伴なう色調変化に係る多様な模様に沿って、加飾層が径方向に弾性回復し、突条状に変形すること、を見出し、上記請求項1記載の発明に至った。
The inventors of the present application are examining the decoration effect of the decorative layer colored under various molding conditions in the extrusion molding of the tube body, and the flow mode of the decorative layer resin is the confluence when laminating thinly. A variety of variations occur, and a large disturbance occurs in the flow state of the decorative layer at the lamination interface with the base layer, and a variety of patterns related to the color change caused by the disturbance of the flow state of the decorative layer can appear.
In addition, when an experiment is performed to periodically block the flow path clearance immediately before the merging point of the decorative layer flow path by the blocking means, in the case of a resin having a high melt viscosity (hereinafter referred to as high viscosity), a molten resin In addition, the die swell effect is exhibited at the die outlet, and the stretching effect by the take-up machine is combined with the above-mentioned large disturbance in the flow state of the decorative layer at the laminated interface. The inventors have found that the decorative layer elastically recovers in the radial direction along a variety of patterns related to the color change and deforms into a ridge shape, and the invention according to claim 1 has been reached.

すなわち、この請求項1の方法は上記した共押出成形における、薄肉に積層される加飾層の積層界面での流動に係る乱れと、そして高粘度の加飾層樹脂のダイス出口におけるダイスエル効果と、引取機による伸張効果を利用したものである。特に合流点直前の流路を遮断手段で遮断しようとする際には、この高粘度の加飾層樹脂に大きな圧縮力が印加され、この際に貯蔵された弾性的なエネルギーがダイス出口で解放され大きなダイスエル効果が発揮され、引取機による伸張効果が相俟って加飾層による突条を顕著に発現させることができる。   That is, the method of claim 1 is the above-described co-extrusion molding, the disturbance relating to the flow at the lamination interface of the thin decorative layer, and the die swell effect at the die outlet of the high viscosity decorative layer resin. , Utilizing the extension effect by the take-up machine. In particular, when trying to block the flow path just before the junction with a blocking means, a large compressive force is applied to this highly viscous decorative layer resin, and the elastic energy stored at this time is released at the die outlet. In addition, a large die swell effect is exhibited, and the extension effect by the take-up machine can be combined to remarkably develop the protrusions by the decorative layer.

なお、加飾層用と基体層の合成樹脂は同種の樹脂とすることにより、接着層を設ける必要もなく、生産性、成形性の点で有利であるが、用途、性能、外観等を考慮して異種の樹脂を組み合わせて使用することもできる。
また、加飾層と基体層の間に必要に応じて中間層を形成することもできるが、この場合には薄肉の加飾層が中間層に合流状に積層される際における流動の乱れを利用することになる。
Note that the synthetic resin for the decorative layer and the base layer are the same type of resin, so there is no need to provide an adhesive layer, which is advantageous in terms of productivity and moldability, but considering the application, performance, appearance, etc. Thus, different resins can be used in combination.
In addition, an intermediate layer can be formed between the decorative layer and the base layer as necessary, but in this case, the flow disturbance when the thin decorative layer is laminated on the intermediate layer in a confluent state is prevented. Will be used.

また、加飾層の外側に、さらに、低粘度の透明性を有する合成樹脂を極く薄肉に積層することにより、この層がクリアトップ層としての機能を発揮して、容器全体を高品位な光沢状態とすることができる。
このクリアトップ層は極く薄肉で低粘度の樹脂製であるので、加飾層のダイスエル効果はこのクリアトップ層に阻害されることなく十分発揮され、このクリアトップ層は加飾層の突条に沿ってこの加飾層を被覆する。
In addition, by laminating a synthetic resin having low viscosity and transparency on the outside of the decorative layer so as to be extremely thin, this layer can function as a clear top layer, and the entire container can be made of high quality. It can be in a glossy state.
Since this clear top layer is made of an extremely thin and low-viscosity resin, the die swell effect of the decorative layer is fully demonstrated without being obstructed by this clear top layer, and this clear top layer is a protrusion of the decorative layer. The decorative layer is covered along

また、加飾層流路を円環状として、遮断手段を遮断リングとすることにより、チューブ体の全周に亘って、加飾層を積層し、凹凸模様を現出させることができる。 Moreover , a decoration layer can be laminated | stacked over the perimeter of a tube body by making a decoration layer flow path into an annular | circular shape, and a interruption | blocking means as a interruption | blocking ring, and an uneven | corrugated pattern can be revealed.

また、加飾層樹脂をMIが1.0g/10分以下の範囲であるPE樹脂を使用することにより、遮断手段による圧縮力の印加効果と相俟って、ダイスエル効果を十分発揮させることができる。
なお、MIが小さすぎると、すなわち溶融粘度が高すぎると凹凸模様が破断する等の成形の不安定が生じるので、MIの下限は遮断手段による加飾層流路の遮断の態様とも組み合わせて決める。
ここで、MI(メルトインデックス)はJIS K7210に準拠し、190℃、2.16Kg荷重で測定したものである。
Moreover , by using PE resin whose MI is in the range of 1.0 g / 10 min or less as the decorative layer resin, the effect of applying the compressive force by the blocking means can be sufficiently exerted. Can do.
If the MI is too small, that is, if the melt viscosity is too high, instability of molding such as breakage of the concavo-convex pattern occurs, so the lower limit of MI is determined in combination with the mode of blocking the decorative layer flow path by the blocking means. .
Here, MI (melt index) is based on JIS K7210 and measured at 190 ° C. under a load of 2.16 kg.

また、加飾層樹脂をMFRが1.0g/10分以下の範囲であるPP樹脂製とすることにより、遮断手段に圧縮力の印加効果と相俟って、ダイスエル効果を十分発揮させることができる。
なお、MFRが小さすぎると、すなわち溶融粘度が高すぎると凹凸模様が破断する等の成形の不安定が生じるので、MFRの下限は遮断手段による加飾層流路の遮断の態様とも組み合わせて決める。
ここで、MFR(メルトフローレイト)はJIS K7210に準拠し、230℃、2.16Kg荷重の条件で測定したものである。
In addition , by making the decorative layer resin made of PP resin with an MFR in the range of 1.0 g / 10 min or less, combined with the effect of applying compressive force to the blocking means, the die swell effect can be sufficiently exerted. Can do.
If the MFR is too small, that is, if the melt viscosity is too high, instability of molding such as the concavo-convex pattern is broken, the lower limit of the MFR is determined in combination with the mode of blocking the decorative layer flow path by the blocking means. .
Here, MFR (melt flow rate) is measured in accordance with JIS K7210 under the conditions of 230 ° C. and 2.16 kg load.

請求項記載の発明の方法は、請求項の発明において、加飾層による突条の突出高さの最大値を0.05mm以上になるようにしたこと、にある。 The method of the invention described in claim 2 resides in that, in the invention of claim 1 , the maximum value of the protrusion height of the protrusion by the decorative layer is set to 0.05 mm or more.

請求項記載の上記方法により、加飾層による突条の突出高さの最大値を0.05mm以上になるようにすることにより、視覚的には光の方向により陰影が十分に現出し彫刻状の視覚効果が発揮されると共に、指先等を触れることにより触感的にも凹凸が十分に認識される。 According to the method of claim 2, by making the maximum protrusion height of the ridges by the decorative layer to be 0.05 mm or more, the shading appears sufficiently depending on the direction of light visually. As a result, the unevenness is sufficiently recognized by touching the fingertip or the like.

請求項記載の発明の方法は、請求項1または2の発明において、木目調の凹凸模様を現出させたこと、にある。 According to a third aspect of the present invention, there is provided the method according to the first or second aspect , wherein a grainy uneven pattern is made to appear.

請求項記載の上記方法により、加飾層用樹脂の溶融粘度、遮断手段による遮断方法、そして引取速度の組み合わせにより、様々な態様の木目調の模様を現出することができる。 According to the method of claim 3 , various patterns of wood grain can be revealed by a combination of the melt viscosity of the decorative layer resin, the blocking method by the blocking means, and the take-off speed.

請求項記載の発明の方法は、請求項1、2または3の発明において、加飾層樹脂を着色樹脂として、凹凸模様に沿って色調変化を現出させたこと、にある。 According to a fourth aspect of the present invention, in the first, second, or third aspect of the invention, the decoration layer resin is used as a colored resin to cause a change in color tone along a concavo-convex pattern.

請求項記載の上記方法により、たとえば基体層樹脂に白色に着色したものを、加飾層樹脂に赤、青、緑等の有色に着色したものを用いることにより、外表面の凹凸模様に沿って色調変化に係る模様を現出させることができ、また着色部分が浮き上がったような視覚効果も発揮される。 By using the above-described method according to claim 4 , for example, the base layer resin colored in white, and the decorative layer resin colored in red, blue, green, or the like is used to follow the uneven pattern on the outer surface. As a result, a pattern related to a change in color tone can be made to appear, and a visual effect that a colored portion is lifted is also exhibited.

本発明は、上記した加飾方法に係るものであり、以下に示す効果を奏する。
請求項1記載の発明にあっては、
共押出成形における、薄肉に積層される加飾層の界面での流動に係る乱れと、高粘度の加飾層樹脂のダイスエル特性と、引取機による伸張効果を利用したものであり、合流点直前の流路を遮断手段で遮断しようとする際には、高粘度の加飾層樹脂に大きな圧縮力が印加され、この際に貯蔵された弾性的なエネルギーがダイス出口で解放され大きなダイスエル効果が発揮され、引取機による伸張効果も相俟って、加飾層による突条を顕著に発現させることができる。
The present invention relates to the decoration method described above, and has the following effects.
In the invention of claim 1,
In co-extrusion molding, it utilizes the turbulence related to the flow at the interface of the decorative layer laminated thin, the die swell characteristics of the high-viscosity decorative layer resin, and the stretch effect by the take-up machine. When trying to block the flow path with the blocking means, a large compressive force is applied to the high-viscosity decorative layer resin, and the elastic energy stored at this time is released at the die outlet, resulting in a large die swell effect. It is demonstrated and, together with the stretching effect by the take-up machine, the protrusions by the decorative layer can be remarkably expressed.

また、加飾層流路を円環状として、遮断手段を遮断リングとすることにより、チューブ体の全周に亘って、加飾層を積層し、凹凸模様を現出させることができる。 Moreover , a decoration layer can be laminated | stacked over the perimeter of a tube body by making a decoration layer flow path into an annular | circular shape, and a interruption | blocking means as a interruption | blocking ring, and an uneven | corrugated pattern can be revealed.

また、加飾層樹脂をMIが1.0以下の範囲であるPE樹脂製とすることにより、遮断手段による圧縮力印加効果と相俟って、ダイスエル効果を十分発揮させることができる。 Further , by making the decorative layer resin made of PE resin having a MI of 1.0 or less, the die swell effect can be sufficiently exhibited in combination with the compressive force application effect by the blocking means.

また、加飾層樹脂をMFRが1.0以下の範囲であるPP樹脂製とすることにより、遮断手段による圧縮力印加効果と相俟って、ダイスエル効果を十分発揮させることができる。 Further , by making the decorative layer resin made of PP resin having an MFR in the range of 1.0 or less, the die swell effect can be sufficiently exhibited in combination with the compressive force application effect by the blocking means.

請求項記載の発明にあっては、加飾層による突条の突出高さの最大値を0.05mm以上とすることにより、光による陰影が十分に現出して彫刻状の視覚効果が発揮されると共に、指先等を触れることにより触感的にも凹凸が十分に認識される。 In the invention according to claim 2, by setting the maximum protrusion height of the protrusions by the decorative layer to 0.05 mm or more, the shading due to light appears sufficiently and a sculptural visual effect is exhibited. At the same time, when the fingertip or the like is touched, the unevenness is sufficiently recognized tactilely.

請求項記載の発明にあっては、加飾層樹脂の溶融粘度、遮断手段による遮断態様、そして引取速度の組み合わせにより、様々な態様の木目調の模様を現出することができる。 In the invention according to the third aspect, various patterns of wood grain can be revealed by a combination of the melt viscosity of the decorative layer resin, the blocking mode by the blocking means, and the take-off speed.

請求項記載の発明にあっては、外表面の凹凸模様に沿って色調変化に係る模様を現出させることができ、また着色部分が浮き上がったような視覚効果も発揮される。 In the invention described in claim 4, a pattern relating to a change in color tone can be made to appear along the uneven pattern on the outer surface, and a visual effect such that a colored portion is lifted is also exhibited.

以下、本発明の実施形態を図面を参照しながら説明する。
図1は本願の加飾方法によって加飾されたチューブ体1の一端にヘッド部4を取り付けたチューブ容器の正面図(写真)、図2は図1中のA−A線近傍の拡大正面図、図3は図2中のA−A線に沿って容器の外表面の凹凸状態を、胴部壁を平断面状にして示す説明図である。
なお、このチューブ容器の底部はまだシールをしない開放状態である。
Embodiments of the present invention will be described below with reference to the drawings.
1 is a front view (photograph) of a tube container in which a head portion 4 is attached to one end of a tube body 1 decorated by the decorating method of the present application, and FIG. 2 is an enlarged front view in the vicinity of the line AA in FIG. FIG. 3 is an explanatory view showing the uneven state of the outer surface of the container along the line AA in FIG.
In addition, the bottom part of this tube container is the open state which is not sealed yet.

チューブ体1は共にPE樹脂製の加飾層2と基体層3の積層体であり、基体層3は白色に着色され、その層厚さの平均値は0.45mmであり、機械的強度、耐薬品性等のチューブ体としての基本的な機能を担う。
また、加飾層2は赤、青、緑等の有色に着色され、この加飾層2により木目調の模様が全周に亘って現出している。
The tube body 1 is a laminate of a decorative layer 2 and a base layer 3 both made of PE resin, the base layer 3 is colored white, the average value of the layer thickness is 0.45 mm, mechanical strength, Responsible for the basic functions of the tube body such as chemical resistance.
The decorative layer 2 is colored in colors such as red, blue, and green, and the decorative layer 2 reveals a woodgrain pattern all around.

さらにこの模様を詳細に見ると、図2と図3から判るように、加飾層2は平坦な基体層3の外表面に多数の突条2aを形成し、この多数の突条2aが外表面全体に少し縦方向に引き伸ばされたネットワークを形成し、凹凸模様Mが現出している。そしてこの突条2aの突出高さは、0.2〜0.3mm程度であり、視覚的には光による陰影が現出し、指先等を触れることにより触感的にも凹凸模様Mが十分に認識される。   Further, when this pattern is seen in detail, as can be seen from FIGS. 2 and 3, the decorative layer 2 forms a large number of protrusions 2a on the outer surface of the flat base layer 3, and the large number of protrusions 2a are formed on the outer surface. A network stretched slightly in the vertical direction is formed on the entire surface, and the uneven pattern M appears. The projecting height of the protrusion 2a is about 0.2 to 0.3 mm, and a shadow by light appears visually, and the uneven pattern M is sufficiently recognized tactilely by touching a fingertip or the like. Is done.

図4は上記したチューブ体1の押出成形装置に係る概略説明図であり、この図4に示される成形装置は加飾層2と基体層3を積層したチューブ体を共押出成形するためのダイス11と、冷却賦形部21と、引取り機22とから構成されている。   FIG. 4 is a schematic explanatory diagram relating to the extrusion molding apparatus for the tube body 1 described above. The molding apparatus shown in FIG. 4 is a die for co-extrusion molding of a tube body in which the decorative layer 2 and the base layer 3 are laminated. 11, a cooling shaping portion 21, and a take-up machine 22.

ダイス11には、円環状の加飾層流路12と円環状基体層流路13が配設されており、基体層樹脂は押出機からなる樹脂供給装置(図示省略)から供給口13aに供給され、加飾層樹脂は押出機31とアキュムレータ32から構成される樹脂供給装置30から、プランジャ33の動作により供給口12aに供給される。
そして、各供給口12a、13aに供給された各樹脂は加飾層流路12と円環状基体層流路13を流動し、合流点14で合流、積層し、さらに下流に形成される円環状の合流路15を経て円筒状積層体としてダイス出口16から押し出される。
The die 11 is provided with an annular decorative layer channel 12 and an annular base layer channel 13, and the base layer resin is supplied to a supply port 13 a from a resin supply device (not shown) made of an extruder. Then, the decorative layer resin is supplied from the resin supply device 30 including the extruder 31 and the accumulator 32 to the supply port 12a by the operation of the plunger 33.
And each resin supplied to each supply port 12a, 13a flows through the decoration layer flow path 12 and the annular | circular shaped base | substrate layer flow path 13, merges at the confluence | merging point 14, is laminated | stacked, and the annular | circular shape formed downstream. It is extruded from the die outlet 16 as a cylindrical laminate through the combined flow path 15.

そして、この円筒状積層体は、引取り機22により伸張され、縮径、及び層厚を減少しながらフォーマー21aを介して冷却賦形部21に進入し、水冷等の手段により軸心18の径にサイジングされチューブ体1が成形される。   The cylindrical laminate is stretched by the take-up machine 22 and enters the cooling shaping portion 21 via the former 21a while reducing the diameter and the layer thickness. The tube body 1 is formed by sizing to a diameter.

図5は図4中、一点鎖線の円で囲った合流点14近傍の拡大図であり、加飾層流路12の遮断手段である遮断リング17の配設状態(図4では図示を省略している。)を縦断して示す概略説明図である。この遮断リング17は、左右方向に摺動可能に配設され、合流点14直前の加飾層流路12の流路クリアランスSを制御するものである。   FIG. 5 is an enlarged view of the vicinity of the junction 14 surrounded by an alternate long and short dash line in FIG. 4, and an arrangement state of a blocking ring 17 that is a blocking means for the decorative layer channel 12 (illustration is omitted in FIG. 4). It is the schematic explanatory drawing which shows vertically. The blocking ring 17 is arranged to be slidable in the left-right direction, and controls the flow path clearance S of the decorative layer flow path 12 immediately before the junction 14.

[実施例]
図4、5に示した装置を用い、図1に示される外表面が加飾されたチューブ体1の押出成形する場合には、下に示す合成樹脂を使用し、遮断リング17により周期的に流路を遮断して、引取機22の引取り速度Vを調整して引き延しながらチューブ体を押出成形する。
基体層樹脂 PE(MI1.9)+白色マスターバッチ
加飾層樹脂 PE(MI0.4)+着色マスターバッチ
[Example]
When extruding the tube body 1 with the outer surface shown in FIG. 1 decorated using the apparatus shown in FIGS. 4 and 5, the synthetic resin shown below is used, and the blocking ring 17 periodically The tube body is extruded while the flow path is blocked and the take-up speed V of the take-up machine 22 is adjusted and stretched.
Base layer resin PE (MI1.9) + white masterbatch decorative layer resin PE (MI0.4) + colored masterbatch

PE樹脂製の加飾層樹脂のMIが0.4程度と、高粘度の場合には遮断リング17より流路は完全に遮断することは困難であり、溶融樹脂は高い圧縮力下、極く僅かな隙間を流動することにより、大きな流動の乱れが発生した状態で合流点14で基体層13に積層され、ダイス出口16では、遮断リング17部分で貯蔵された弾性的なエネルギーが解放され大きなダイスエル効果が発揮され、加飾層2による突条2aが形成され、さらに引取り機22による伸張効果が相俟って図1に見られる木目調(縦方向に伸長したネットワーク状)の凹凸模様が形成される。   When the MI of the decorative layer resin made of PE resin is as high as about 0.4, it is difficult to completely block the flow path from the blocking ring 17, and the molten resin is extremely under high compressive force. By flowing through a small gap, a large flow turbulence is generated and laminated on the base layer 13 at the confluence 14, and at the die outlet 16, the elastic energy stored in the blocking ring 17 portion is released and large. The die-swell effect is formed, the protrusion 2a is formed by the decorative layer 2, and the unevenness pattern of the wood grain (network shape extending in the vertical direction) seen in FIG. Is formed.

以上、実施例に沿って本発明の実施の形態を説明したが、本発明の作用効果はこれら実施例に限定されものではない。
たとえば、上記実施例では省略したが、加飾層2外側にさらにMIが10程度の低粘度の無着色のPEを薄肉に、加飾層2による凹凸模様Mに沿って積層することもでき、このPE樹脂による層がクリアトップ層としての機能を発揮して、容器全体を高品位な光沢状態とすることができる。
As mentioned above, although embodiment of this invention was described along the Example, the effect of this invention is not limited to these Examples.
For example, although omitted in the above embodiment, a low-viscosity non-colored PE having an MI of about 10 is further thinly laminated on the outer side of the decorative layer 2 along the uneven pattern M by the decorative layer 2, The layer made of this PE resin exhibits a function as a clear top layer, and the entire container can be brought into a high-grade glossy state.

また、加飾層樹脂をPP樹脂とすることもでき、基材層と加飾層を異種の合成樹脂製として積層することもできる。また、ダイの構造、遮断手段により流路クリアランスの時間的な変動パターンも様々に組み合わせることができる。
Moreover, decorating layer resin can also be made into PP resin, and a base material layer and a decorating layer can also be laminated | stacked as a product made from a different kind of synthetic resin. In addition, the temporal variation pattern of the channel clearance can be variously combined by the die structure and the blocking means.

本発明のチューブ体の表面加飾方法は上記説明したようなものであり、加飾層により形成される突条により、視覚的には凹凸による陰影が現出し、指先等を触れることにより触感的にも凹凸が十分に認識されると云う、今までにない加飾効果を有するものであり、チューブ容器等の分野で幅広い用途展開が期待される。   The method of decorating the surface of the tube body of the present invention is as described above, and the projections formed by the decorating layer visually cause shadows due to unevenness to appear and touch the fingertips etc. In addition, it has an unprecedented decorative effect that irregularities are sufficiently recognized, and is expected to be used in a wide range of applications in the field of tube containers and the like.

本発明の加飾方法により加飾されたチューブ体を用いたチューブ容器の正面図である。It is a front view of the tube container using the tube body decorated by the decorating method of this invention. 図1中のA−A線近傍の拡大正面図である。It is an enlarged front view of the AA line vicinity in FIG. 図2中のA−A線に沿って容器の外表面の凹凸状態を、胴部壁を平断面状にして示す説明図である。It is explanatory drawing which shows the uneven | corrugated state of the outer surface of a container along the AA line in FIG. 本発明の加飾方法に係る押出成形装置の一例を示す概略説明図である。It is a schematic explanatory drawing which shows an example of the extrusion molding apparatus which concerns on the decorating method of this invention. 遮断手段の配設状態を縦断して示す概略説明図である。It is a schematic explanatory drawing which shows the arrangement | positioning state of the interruption | blocking means longitudinally.

1 ;チューブ体
2 ;加飾層
2a;突条
3 ;基体層
4 ;ヘッド部
11;ダイス
12;加飾層流路
12a;供給口
13;円環状基体層流路
13a;供給口
14;合流点
15;合流路
16;出口
17;遮断リング(遮断手段)
18;軸心
21;冷却賦形部
21a;フォーマー
22;引取機
30;樹脂供給装置
31;押出機
32;アキュムレータ
33;プランジャ
V ;引取り速度
M ;模様
S ;クリアランス
DESCRIPTION OF SYMBOLS 1; Tube body 2; Decoration layer 2a; Projection 3; Base layer 4; Head part 11; Die 12; Decoration layer flow path 12a; Supply port 13: Toroidal base layer flow path 13a; Point 15; Joint channel 16; Outlet 17; Shut-off ring (blocking means)
18; shaft 21; cooling shaping part 21a; former 22; take-up machine 30; resin supply device 31; extruder 32; accumulator 33; plunger V; take-up speed M;

Claims (4)

少なくとも、基体層(3)を形成する円環状基体層流路(13)と該基体層(3)の外側に加飾層(2)を形成する円環状の加飾層流路(12)を有する多層共押出し成形用ダイス(11)を用い、基体層(3)に加飾層(2)を積層したチューブ体(1)を引取機(22)により伸張をさせながら成形する方法において、
前記加飾層(2)を形成する加飾層樹脂には、MIが1.0g/10分以下の範囲であるポリエチレン樹脂、若しくはMFRが1.0g/10分以下の範囲であるポリプロピレン樹脂を使用し、
前記加飾層流路(12)における、円環状基体層流路(13)への合流点(14)直前部分に流路クリアランス(S)を周期状に遮断する遮断リング(17)を配設し、
前記加飾層樹脂の溶融粘度と、遮断リング(17)による加飾層流路(12)の周期状の断と、引取機(22)による引取速度(V)の組み合わせにより、前記合流点(14)における加飾層(2)と基体層(3)との積層界面で該加飾層(2)に流動乱れを発生せしめると共に、
ダイス出口(16)における、ダイスエル効果と引取機(22)による伸張効果により加飾層樹脂を突条状に変形せしめ、成形品外表面に凹凸模様(M)を形成することを特徴とした合成樹脂製チューブ体の表面加飾方法。
At least an annular base layer channel forming the base layer (3) (13) and said substrate layer (3) decorative layer flow path of annular forming decorative layer (2) on the outside of the (12) In a method of forming a tube body (1) in which a decorative layer (2) is laminated on a base layer (3) while being stretched by a take-up machine (22) using a multilayer coextrusion die (11) having,
For the decorative layer resin forming the decorative layer (2) , a polyethylene resin having an MI of 1.0 g / 10 min or less or a polypropylene resin having an MFR of 1.0 g / 10 min or less is used . use,
In the decorative layer flow path (12), a blocking ring (17) for periodically blocking the flow path clearance (S ) is disposed immediately before the junction (14) to the annular base layer flow path (13). And
And the melt viscosity of the decorative layer resin, and the cycle-like barrier break of the decorative layer flow path by the blocking ring (17) (12), by a combination of take-off speed by the take-up device (22) (V), pre-Symbol merged At the point (14), the decorative layer (2) and the base layer (3) are caused to flow turbulence in the decorative layer (2) at the lamination interface ,
In the die exit (16), a decorative layer resin deform the ridge shape by stretching effect due to die swell effect and the take-up device (22), and characterized by forming a concave convex pattern (M) to the molded article outer surface Surface decoration method for synthetic resin tube bodies.
加飾層(2)による突条(2a)の突出高さの最大値を0.05mm以上になるようにした請求項記載の合成樹脂製チューブ体の表面加飾方法。 The decorative layer (2) surface decoration method of the synthetic resin tube of claim 1, wherein the maximum value of the projection height of the ridges (2a) to be equal to or greater than 0.05mm by. 木目調の凹凸模様(M)を現出させた請求項1または2記載の合成樹脂製チューブ体の表面加飾方法。 The method for decorating the surface of a synthetic resin tube body according to claim 1 or 2, wherein a grainy concavo-convex pattern (M) is revealed. 加飾層樹脂を着色樹脂として、凹凸模様(M)に沿って色調変化を現出させた請求項1、2または3記載の合成樹脂製チューブ体の表面加飾方法。 The method for decorating the surface of a synthetic resin tube body according to claim 1, 2 or 3, wherein the decorative layer resin is used as a colored resin, and a change in color tone is made to appear along the concavo-convex pattern (M).
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