JP2010032374A - Inspection device of multilayered molded object - Google Patents

Inspection device of multilayered molded object Download PDF

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JP2010032374A
JP2010032374A JP2008195054A JP2008195054A JP2010032374A JP 2010032374 A JP2010032374 A JP 2010032374A JP 2008195054 A JP2008195054 A JP 2008195054A JP 2008195054 A JP2008195054 A JP 2008195054A JP 2010032374 A JP2010032374 A JP 2010032374A
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light
molded body
multilayer molded
barrier layer
oxygen barrier
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Masahiro Yamada
雅宏 山田
Kenta Hayashi
林　　謙太
Koji Ishikawa
浩二 石川
Taizo Iwamura
泰造 岩村
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Dai Nippon Printing Co Ltd
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Dai Nippon Printing Co Ltd
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Abstract

<P>PROBLEM TO BE SOLVED: To provide an inspection device of a multilayered molded object detecting the presence of an oxygen barrier layer, as a structure constituted so as not only to be adapted even to the multilayered molded object other than a transparent object but also to detect even partial lamination failure. <P>SOLUTION: The inspection device 1 of the multilayered molded object 10 for inspecting the presence of the oxygen barrier layer 10b of the multilayered molded object 10 is equipped with a light emitting means 2 for irradiating the multilayered molded object 10 with light, a light detecting means 3 for detecting the light transmitted through the multilayered molded object 10 and a discrimination means 5 for determining that the oxygen barrier layer 10b is not provided to the multilayered molded object 10 in a case that the light detecting means 3 discriminates that light satisfying the following condition formula (1), that is, 3,100 cm<SP>-1</SP><L<3,550 cm<SP>-1</SP>(wherein L is the wavenumber of the light discriminated by the discrimination means 5) is contained in light having a predetermined wavenumber and determining that the oxygen barrier layer 10b is provided to the multilayered molded object 10 in a case that the light detecting means 3 discriminates that the light satisfying the following condition formula (1) is not contained. <P>COPYRIGHT: (C)2010,JPO&INPIT

Description

本発明は、多層成形体に対して酸化防止のための酸素バリア層の有無を検査する多層成形体検査装置に関するものである。   The present invention relates to a multilayer molded body inspection apparatus that inspects a multilayer molded body for the presence or absence of an oxygen barrier layer for preventing oxidation.

従来から、酸素や水蒸気の透過を防止するために、中間層としてナイロン樹脂をベースとしたバリア層が設けられた多層透明体がある。この多層透明体のバリア層の有無を検査する装置として、多層透明体に光源から光を照射し、その光によって生じる乱反射の状態をカメラで撮像し、検査する装置がある（特許文献１）。
特開２００７−２５６０７６号公報 Conventionally, in order to prevent permeation of oxygen and water vapor, there is a multilayer transparent body provided with a barrier layer based on nylon resin as an intermediate layer. As an apparatus for inspecting the presence or absence of the barrier layer of the multilayer transparent body, there is an apparatus that irradiates light from a light source to the multilayer transparent body, images a state of irregular reflection caused by the light, and inspects it with a camera (Patent Document 1).
JP 2007-256076 A

しかしながら、上記従来の多層成形体検査装置は、検査対象が透明体でなければならなかった。また、部分的な積層不良等を検出することが困難であった。   However, in the conventional multilayer molded body inspection apparatus, the inspection object must be a transparent body. In addition, it is difficult to detect a partial stacking failure or the like.

本発明は従来技術のこのような問題点に鑑みてなされたものであり、その目的は、透明体以外の多層成形体に対しても適用可能であり、部分的な積層不良も検出可能な構成として酸素バリア層の有無を検出する多層成形体検査装置を提供することである。   The present invention has been made in view of such problems of the prior art, and the object thereof is applicable to multilayer molded bodies other than transparent bodies, and can detect partial stacking faults. The present invention provides a multilayer molded body inspection apparatus that detects the presence or absence of an oxygen barrier layer.

上記目的を達成する本発明の多層成形体検査装置は、多層成形体の酸素バリア層の有無を検査する多層成形体検査装置において、光を前記多層成形体に照射する発光手段と、前記多層成形体から透過された光を受光する受光手段と、前記受光手段が受光した光に以下の条件式（１）を満足する光が含まれていると判別した場合、多層成形体に酸素バリア層がないと判別し、以下の条件式（１）を満足する光が含まれていないと判別した場合、多層成形体に酸素バリア層があると判別する判別手段と、を備えたことを特徴とする。
３１００ｃｍ-1＜Ｌ＜３５５０ｃｍ-1 ・・・（１）
ただし、Ｌは判別手段が判別する光の波数である。 The multilayer molded body inspection apparatus of the present invention that achieves the above object is a multilayer molded body inspection apparatus for inspecting the presence or absence of an oxygen barrier layer in a multilayer molded body, and a light emitting means for irradiating the multilayer molded body with light, and the multilayer molding. A light receiving means for receiving light transmitted from the body, and when the light received by the light receiving means is determined to contain light satisfying the following conditional expression (1), an oxygen barrier layer is formed on the multilayer molded body: And determining means for determining that the multilayer molded body has an oxygen barrier layer when it is determined that light that satisfies the following conditional expression (1) is not included. .
3100cm -1 <L <3550cm -1 ··· (1)
However, L is the wave number of the light which a discrimination means discriminate | determines.

また、前記受光手段は、所定の波長帯域のみ選択して受光するバンドパスフィルタを有することを特徴とする。   The light receiving means may include a band pass filter that selects and receives only a predetermined wavelength band.

また、前記判別手段が多層成形体に酸素バリア層がないと判断した場合、警報を発信する警報手段を有することを特徴とする。   Moreover, when the said determination means determines that there is no oxygen barrier layer in a multilayer molded object, it has an alarm means which transmits an alarm.

本発明の多層成形体検査装置によれば、透明体以外の多層成形体に対しても適用可能であり、部分的な積層不良も検出可能な構成として酸素バリア層の有無を検出することができる。   According to the multilayer molded body inspection apparatus of the present invention, it can be applied to multilayer molded bodies other than transparent bodies, and the presence or absence of an oxygen barrier layer can be detected as a configuration capable of detecting partial stacking faults. .

以下、図面を参照にして本実施形態の多層成形体検査装置を説明する。   Hereinafter, the multilayer molded body inspection apparatus of the present embodiment will be described with reference to the drawings.

図１は、多層成形体検査装置１を示す図である。図中、１は多層成形体検査装置、２は発光手段、３は受光手段としてのフォトダイオード、５は判別手段、６は警報手段、１０は多層成形体としての多層カップである。   FIG. 1 is a view showing a multilayer molded body inspection apparatus 1. In the figure, 1 is a multilayer molded body inspection device, 2 is a light emitting means, 3 is a photodiode as a light receiving means, 5 is a discrimination means, 6 is an alarm means, and 10 is a multilayer cup as a multilayer molded body.

多層成形体検査装置１は、多層カップ１０の酸素バリア層の有無を検査するものであって、所定の波数帯域幅をもつ光を多層カップ１０に照射する発光手段２と、多層カップ１０から透過された光を受光するフォトダイオード３と、を備えている。   The multilayer molded body inspection apparatus 1 inspects the presence or absence of an oxygen barrier layer in the multilayer cup 10, and emits light having a predetermined wave number bandwidth to the multilayer cup 10, and is transmitted from the multilayer cup 10. And a photodiode 3 for receiving the emitted light.

また、多層成形体検査装置１は、フォトダイオード３が光を受光した場合、多層カップ１０に酸素バリア層がないと判断する判別手段５を有し、判別手段５が多層カップ１０に酸素バリア層がないと判断した場合、ランプを点灯したり、警報音を発信する警報手段６を有する。   In addition, the multilayer molded body inspection apparatus 1 includes a determination unit 5 that determines that the multilayer cup 10 has no oxygen barrier layer when the photodiode 3 receives light, and the determination unit 5 includes the oxygen barrier layer in the multilayer cup 10. When it is determined that there is no alarm, the alarm means 6 for turning on the lamp or transmitting an alarm sound is provided.

発光手段２は、赤外線を発光する赤外光源２ａからなる。フォトダイオード３は、赤外光源２ａの発光する光のうち約２９５０ｎｍ〜３０５０ｎｍの波長帯域のみ選択して受光させるバンドパスフィルタ３ａを有する。なお、発光手段２側にバンドパスフィルタを備えてもよい。   The light emitting means 2 includes an infrared light source 2a that emits infrared light. The photodiode 3 has a band-pass filter 3a that selects and receives only the wavelength band of about 2950 nm to 3050 nm from the light emitted from the infrared light source 2a. A band pass filter may be provided on the light emitting means 2 side.

図２は、検査対象となる多層カップ１０を示す図である。図２（ａ）は多層カップ１０の斜視図、図２（ｂ）は多層カップ１０の一部の断面図である。多層カップ１０は、図に示すように、ＰＰ（ポリプロピレン）からなる保護層１０ａの間に、酸化防止のための酸素バリア層１０ｂを有するものである。   FIG. 2 is a view showing the multilayer cup 10 to be inspected. 2A is a perspective view of the multilayer cup 10, and FIG. 2B is a cross-sectional view of a part of the multilayer cup 10. As shown in the drawing, the multilayer cup 10 has an oxygen barrier layer 10b for preventing oxidation between protective layers 10a made of PP (polypropylene).

酸素バリア層１０ｂは、ＥＶＯＨ（エチレン−ビニルアルコール共重合樹脂）又はＭＸＤ６等からなる。本実施形態では、ＥＶＯＨを適用する。   The oxygen barrier layer 10b is made of EVOH (ethylene-vinyl alcohol copolymer resin) or MXD6. In the present embodiment, EVOH is applied.

ＥＶＯＨは、エチレンと酢酸ビニル共重合物の加水分解により得られるものである。また、ＥＶＯＨは、ポリビニルアルコールの高ガスバリア性を有し、カップ等の酸素バリア材として用いられている。   EVOH is obtained by hydrolysis of ethylene and vinyl acetate copolymer. EVOH has a high gas barrier property of polyvinyl alcohol and is used as an oxygen barrier material such as a cup.

図３は、ＥＶＯＨとＰＰの波数に対するスペクトルデータを示すグラフである。図３（ａ）はＥＶＯＨに対するグラフ、図３（ｂ）はＰＰに対するグラフである。図３から明らかなように、波数３２００〜３５５０ｃｍ-1の波長帯域において、図３（ａ）に示すＥＶＯＨでは、点線で示すように高い吸収率をもち、図３（ｂ）に示すＰＰでは、吸収率がほとんどない。 FIG. 3 is a graph showing spectrum data with respect to wave numbers of EVOH and PP. FIG. 3A is a graph for EVOH, and FIG. 3B is a graph for PP. As is clear from FIG. 3, in the wavelength band of wave numbers 3200 to 3550 cm −1 , EVOH shown in FIG. 3A has a high absorption rate as shown by a dotted line, and PP shown in FIG. There is almost no absorption rate.

多層成形体検査装置１は、この性質を利用して、多層カップ１０にＥＶＯＨ等の酸素バリア層１０ｂが存在するか否かを検出するものである。その作用について説明する。   The multilayer molded body inspection apparatus 1 uses this property to detect whether or not the oxygen barrier layer 10b such as EVOH is present in the multilayer cup 10. The operation will be described.

まず、多層成形体検査装置１の発光手段２とフォトダイオード３の間に、多層カップ１０を配置する。続いて、発光手段２が光を多層カップ１０に照射する。続いて、フォトダイオード３が多層カップ１０から透過された光のうちバンドパスフィルタ３ａにより、約２９５０ｎｍ〜３０５０ｎｍの波長帯域のみ選択して受光する。   First, the multilayer cup 10 is disposed between the light emitting means 2 and the photodiode 3 of the multilayer molded body inspection apparatus 1. Subsequently, the light emitting means 2 irradiates the multilayer cup 10 with light. Subsequently, the photodiode 3 selects and receives only the wavelength band of about 2950 nm to 3050 nm by the band pass filter 3 a out of the light transmitted from the multilayer cup 10.

判別手段５は、受光した光が、以下の条件式（１）を満足する光を含むか否かを判別し、以下の条件式（１）を満足する光が含まれていると判別した場合、多層カップ１０に酸素バリア層１０ｂがないと判断し、以下の条件式（１）を満足する光が含まれていないと判別した場合、多層カップ１０に酸素バリア層１０ｂがあると判断するものである。
３１００ｃｍ-1＜Ｌ＜３５５０ｃｍ-1 ・・・（１）
ただし、Ｌは判別手段５が判別する光の波数である。 The determination unit 5 determines whether or not the received light includes light that satisfies the following conditional expression (1), and determines that the light that satisfies the following conditional expression (1) is included: When it is determined that the multilayer cup 10 does not have the oxygen barrier layer 10b and it is determined that the light satisfying the following conditional expression (1) is not included, it is determined that the multilayer cup 10 has the oxygen barrier layer 10b. It is.
3100cm -1 <L <3550cm -1 ··· (1)
However, L is the wave number of the light which the discrimination means 5 discriminate | determines.

また、判別手段５は、受光した光が、以下の条件式（２）を満足する光を含むか否かを判別するものであることがより好ましい。
３２００ｃｍ-1＜Ｌ＜３５００ｃｍ-1 ・・・（２）
ただし、Ｌは判別手段５が判別する光の波数である。 Further, it is more preferable that the discriminating means 5 discriminates whether or not the received light includes light that satisfies the following conditional expression (2).
3200 cm −1 <L <3500 cm −1 (2)
However, L is the wave number of the light which the discrimination means 5 discriminate | determines.

さらに、判別手段５が判別する光の波数Ｌは約３３４４ｃｍ-1であることがより好ましい。 Further, the wave number L of the light discriminated by the discriminating means 5 is more preferably about 3344 cm −1 .

図４は、フォトダイオード３の出力を示すグラフである。このグラフでは、非透明の白いＰＰの間にＥＶＯＨの層を有する多層カップ、透明のＰＰの間にＥＶＯＨの層を有する多層カップ、透明のＰＰの間にＭＸＤ６の層を有する多層カップ及びＰＰ単層のカップの場合の出力を示している。なお、このグラフでは、透過光を検出した場合に電圧が低くなるように表されている。また、横軸は実験回数、縦軸は電圧を示す。   FIG. 4 is a graph showing the output of the photodiode 3. This graph shows a multilayer cup with a layer of EVOH between non-transparent white PP, a multilayer cup with a layer of EVOH between transparent PP, a multilayer cup with a layer of MXD6 between transparent PP and a single PP The output for a layer cup is shown. In this graph, the voltage is shown to be low when transmitted light is detected. The horizontal axis represents the number of experiments, and the vertical axis represents the voltage.

まず、発光手段２とフォトダイオード３の間に何も配置しない状態での出力は、約６．２４２［Ｖ］であった。次に、発光手段２とフォトダイオード３の間に、非透明の白いＰＰの間にＥＶＯＨの層を有する多層カップ１０を配置した場合の出力は、紙面に対して最も左の上に凸の部分Ａであり、約６．２５７［Ｖ］であった。   First, the output when nothing was arranged between the light emitting means 2 and the photodiode 3 was about 6.242 [V]. Next, the output when the multilayer cup 10 having the EVOH layer between the non-transparent white PP is arranged between the light emitting means 2 and the photodiode 3 is a leftmost convex portion with respect to the paper surface. A, which was approximately 6.257 [V].

次に、発光手段２とフォトダイオード３の間に、透明のＰＰの間にＥＶＯＨの層を有する多層カップ１０を配置した場合の出力は、紙面に対して左から２番目の上に凸の部分Ｂであり、約６．２５７［Ｖ］であった。次に、発光手段２とフォトダイオード３の間に、透明のＰＰの間にＭＸＤ６の層を有する多層カップ１０を配置した場合の出力は、紙面に対して左から３番目の上に凸の部分Ｃであり、約６．２５７［Ｖ］であった。   Next, when the multilayer cup 10 having the EVOH layer between the transparent PP and the light emitting means 2 and the photodiode 3 is arranged, the output is the second convex part from the left with respect to the paper surface. B, about 6.257 [V]. Next, when the multilayer cup 10 having the MXD 6 layer is disposed between the transparent PP and the light emitting means 2 and the photodiode 3, the output is the third convex part from the left with respect to the paper surface. C, which was approximately 6.257 [V].

次に、透明ＰＰ単層のカップを配置した場合の出力は、紙面に対して最も右の上に凸の部分Ｄであり、約６．２５［Ｖ］であった。   Next, the output when the transparent PP single-layer cup was arranged was the portion D that is convex to the rightmost with respect to the paper surface, and was about 6.25 [V].

図４に示すように、ＥＶＯＨ等の酸素バリア層を有する多層カップと、酸素バリアを有しないＰＰ単層カップとは、約６．２５３［Ｖ］付近を境として、出力電圧が明確に異なる。   As shown in FIG. 4, the multi-layer cup having an oxygen barrier layer such as EVOH and the PP single-layer cup having no oxygen barrier clearly differ in output voltage around about 6.253 [V].

したがって、多層成形体検査装置１により検査対象となるカップが酸素バリア層を有するか否かを容易に判別することができる。また、比較的に安価で容易に作成可能であり、メンテナンス性もよい。   Therefore, it is possible to easily determine whether or not the cup to be inspected has the oxygen barrier layer by the multilayer molded body inspection apparatus 1. In addition, it can be easily produced at a relatively low cost and has good maintainability.

さらに、多層成形体検査装置１又は多層カップ１０を移動可能とすることにより、カップ全体を走査するように構成すれば、全体的な不良も、部分的な積層不良も検出可能となり、好ましい。   Furthermore, if the multilayer molded body inspection apparatus 1 or the multilayer cup 10 is made movable so that the entire cup is scanned, it is possible to detect both overall defects and partial stacking defects.

図５は他の実施形態を示す図である。図６に示す実施形態では、受光手段として、フォトダイオード３に代えて、赤外カメラ４を適用したものである。赤外カメラ４を適用することにより、ＥＶＯＨ等の酸素バリア層の有無を視覚的に判断することが可能となる。   FIG. 5 is a diagram showing another embodiment. In the embodiment shown in FIG. 6, an infrared camera 4 is applied as the light receiving means in place of the photodiode 3. By applying the infrared camera 4, it is possible to visually determine the presence or absence of an oxygen barrier layer such as EVOH.

なお、本実施形態では、バンドパスフィルタ３ａを用いた方法について説明しているがバンドパスフィルタ３ａを用いずに全波長の光を照射し、受光手段３の出力信号にFFT（フーリエ変換）をかけて、所定の波長の有無により酸素バリア層の有無を判別する方法でも実施可能である。   In the present embodiment, the method using the bandpass filter 3a is described. However, light of all wavelengths is irradiated without using the bandpass filter 3a, and the output signal of the light receiving means 3 is subjected to FFT (Fourier transform). In addition, the present invention can also be implemented by a method for determining the presence or absence of an oxygen barrier layer based on the presence or absence of a predetermined wavelength.

以上、本発明の多層成形体検査装置を実施形態に基づいて説明してきたが、本発明はこれら実施形態に限定されず種々の変形が可能である。   As mentioned above, although the multilayer molded object inspection apparatus of this invention has been demonstrated based on embodiment, this invention is not limited to these embodiment, A various deformation | transformation is possible.

多層成形体検査装置を示す図である。It is a figure which shows a multilayer molded object inspection apparatus. 検査対象となる多層カップを示す図である。It is a figure which shows the multilayer cup used as a test object. ＥＶＯＨとＰＰの波数に対するスペクトルデータを示すグラフである。It is a graph which shows the spectrum data with respect to the wave number of EVOH and PP. フォトダイオードの出力を示すグラフである。It is a graph which shows the output of a photodiode. 他の実施形態を示す図である。It is a figure which shows other embodiment.

符号の説明Explanation of symbols

１…多層成形体検査装置
２…赤外光源（発光手段）
３…フォトダイオード（受光手段）
４…赤外カメラ（受光手段）
５…判別手段
６…警報手段
１０…多層カップ（多層成形体） DESCRIPTION OF SYMBOLS 1 ... Multilayer molded object inspection apparatus 2 ... Infrared light source (light emission means)
3 ... Photodiode (light receiving means)
4. Infrared camera (light receiving means)
5 ... Discriminating means 6 ... Alarm means 10 ... Multi-layer cup (multi-layer molded product)

Claims (3)

多層成形体の酸素バリア層の有無を検査する多層成形体検査装置において、
光を前記多層成形体に照射する発光手段と、
前記多層成形体から透過された光を受光する受光手段と、
前記受光手段が受光した光に以下の条件式（１）を満足する光が含まれていると判別した場合、多層成形体に酸素バリア層がないと判別し、以下の条件式（１）を満足する光が含まれていないと判別した場合、多層成形体に酸素バリア層があると判別する判別手段と、
を備えた
ことを特徴とする多層成形体検査装置。
３１００ｃｍ-1＜Ｌ＜３５５０ｃｍ-1 ・・・（１）
ただし、Ｌは判別手段が判別する光の波数である。 In the multilayer molded body inspection device that inspects the presence or absence of the oxygen barrier layer of the multilayer molded body,
A light emitting means for irradiating the multilayer molded body with light;
A light receiving means for receiving light transmitted from the multilayer molded body;
When it is determined that the light received by the light receiving means includes light that satisfies the following conditional expression (1), it is determined that the multilayer molded body does not have an oxygen barrier layer, and the following conditional expression (1) is satisfied: A discriminating means for discriminating that the multilayer molded body has an oxygen barrier layer when it is discriminated that no satisfactory light is contained;
A multilayer molded body inspection apparatus comprising:
3100cm -1 <L <3550cm -1 ··· (1)
However, L is the wave number of the light which a discrimination means discriminate | determines. 前記受光手段は、所定の波長帯域のみ選択して受光するバンドパスフィルタを有する
ことを特徴とする請求項１に記載の多層成形体検査装置。 The multilayer molded body inspection apparatus according to claim 1, wherein the light receiving unit includes a bandpass filter that selects and receives only a predetermined wavelength band. 前記判別手段が多層成形体に酸素バリア層がないと判断した場合、警報を発信する警報手段を有することを特徴とする請求項１又は請求項２に記載の多層成形体検査装置。   3. The multilayer molded body inspection apparatus according to claim 1, further comprising an alarm unit that issues an alarm when the determining unit determines that the multilayer molded body has no oxygen barrier layer. 4.
JP2008195054A 2008-07-29 2008-07-29 Inspection device of multilayered molded object Pending JP2010032374A (en)

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