JP3845801B2 - Foreign object detection method - Google Patents
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Description
本発明は、パック食品等の包装食品内に混入した毛髪等の異物をＸ線を照射して検出する異物検出方法に関するものである。 The present invention relating to foreign substances such as the hair entrained within packaging foods such as pack food foreign object detecting method for detecting X-ray was irradiated.
周知の通り、近年、パック食品等の包装食品内への異物混入が大きな問題となっており、食品製造メーカでは、ＰＬ法に則って製造工程に金属探知機やＸ線検査装置を導入して異物混入防止に努めている。 As is well known, in recent years, contamination of packaged foods such as packed foods has become a major problem, and food manufacturers have introduced metal detectors and X-ray inspection equipment in the manufacturing process in accordance with the PL method. Efforts are made to prevent contamination.
前記包装食品に混入した異物を検査する装置としては、例えば、ベルトコンベアによって搬送される肉類等の食品中にＸ線を照射して微粒子トナーにより形成されたＸ線透過画像に反射照明を当てながらＴＶカメラで直接とりこんで撮像し、異物をリアルタイムで検査する食品用異物自動検査装置（特許文献１参照）や搬送される食品を撮像する撮像装置と該撮像装置で撮像された光学像を２値化する２値化手段と該２値化手段で２値化したデータの内、毛髪の形状を部分特徴として抽出する部分特徴抽出手段とを設けて一定以上の長さをもった直線又は曲線の線状体であるか否かを判定することによりパック食品の中に毛髪が混入しているか否かを探知するパック食品の毛髪探知装置（特許文献２参照）が提案されている。 As an apparatus for inspecting foreign matters mixed in the packaged food, for example, while irradiating X-rays on food such as meat conveyed by a belt conveyor and applying reflected illumination to an X-ray transmission image formed by fine particle toner A food foreign matter automatic inspection device (see Patent Document 1) that directly captures and captures a foreign object in real time with a TV camera, an image pickup device that picks up food being conveyed, and an optical image picked up by the image pickup device are binarized. A binarizing means for converting the data into binarization means and a partial feature extracting means for extracting the shape of the hair as a partial feature from the data binarized by the binarizing means so that a straight line or a curve having a certain length or more is provided. There has been proposed a packaged food hair detection device (see Patent Document 2) that detects whether or not hair is mixed in a packaged food by determining whether or not it is a linear body.
なお、約２〜40重量％の水溶性又は水分散性固着性樹脂と電解質と約30〜90重量％の水と０〜30重量％のアルコールと約５〜50重量％の液化ガス噴射剤とを含むエアゾール水性組成物を毛髪に噴霧して特別の型や形態の髪形を保持するスタイリング助剤組成物（特許文献３参照）が知られている。 In addition, about 2 to 40% by weight of water-soluble or water-dispersible fixing resin, electrolyte, about 30 to 90% by weight of water, 0 to 30% by weight of alcohol, and about 5 to 50% by weight of liquefied gas propellant There is known a styling aid composition (see Patent Document 3) that retains a hairstyle of a special type or form by spraying an aqueous aerosol composition containing a hair onto the hair.
しかし、金属探知機や前記食品用異物自動検査装置等のＸ線検査装置では、毛髪、木片、紙片、布片、薄いプラスチック片、ゴム片、砂を高精度をもって検出することは難しく、完全に除去できない場合があった。 However, it is difficult to detect hair, wood pieces, paper pieces, cloth pieces, thin plastic pieces, rubber pieces, and sand with high precision by using X-ray inspection devices such as metal detectors and automatic food foreign matter inspection devices. Sometimes it could not be removed.
また、食品包装工程においては、検知が非常に難しい毛髪の混入を防ぐために作業者に帽子の着用を義務付けているが、混入を完全に防止することはできないという問題点があり、さらに、前記パック食品の毛髪探知装置では、予め設定された形状以外の形をした髪の毛は探知できないという問題点があった。 In addition, in the food packaging process, an operator is required to wear a hat to prevent hair contamination that is very difficult to detect, but there is a problem that contamination cannot be completely prevented. The food hair detection apparatus has a problem in that hair having a shape other than a preset shape cannot be detected.
そこで、本発明者は、従来と同様のＸ線の照射による異物検査方法であってもパック食品等の包装食品に混入した異物を容易に検出することができる新規技術手段の具現化をはかるべく研究・実験を重ねた結果、胃の検査においてはバリウムを飲んだ後に胃のＸ線透視を行っていることに着目し、該バリウムが包装食品に混入した異物に付着していれば、該異物の大小、形に関係なくＸ線の照射により容易に検出することができ、しかも、人体に無害であるバリウムを含んだ噴霧剤を作業者の頭髪にスプレーして作業に従事させるなどの手段により、包装食品に混入して異物となる可能性の高いものに前もってスプレーしておけばよいという刮目すべき知見を得、前記技術的課題を達成したものである。 Therefore, the present inventor intends to realize a new technical means that can easily detect foreign matters mixed in packaged foods such as packed foods, even with the same foreign substance inspection method by X-ray irradiation as in the past. As a result of repeated research and experiment, paying attention to the X-ray fluoroscopy of the stomach after drinking barium in the examination of the stomach, if the barium adheres to foreign matter mixed in packaged food, It can be easily detected by X-ray irradiation regardless of the size and shape, and spraying a spray containing barium, which is harmless to the human body, on the operator's hair and engaging the work. The above technical problem has been achieved by obtaining a remarkable knowledge that it is only necessary to spray in advance on the food that is likely to be mixed into the packaged food and become a foreign substance.
前記技術的課題は、次の通りの本発明によって解決できる。 The technical problem can be solved by the present invention as follows.
即ち、本発明に係る異物検出方法は、組成剤と噴射剤との混合容積比が液体状態で40：60〜70：30であり、前記組成剤が硫酸バリウム20〜50重量％と水溶性樹脂５〜20重量％と分散剤１〜５重量％と希釈溶剤25〜74重量％とを含んでなる異物検出用スプレー組成物を包装食品内に混入して異物となるものに前もってスプレーして当該包装食品内に混入した毛髪等の異物をＸ線を照射して検出するものである。 That is, engagement Ru foreign object detecting method according to the present invention, 40 mixing volume ratio of the composition agent and propellant in a liquid state: 60-70: A 30, wherein the composition agent and 20-50% by weight barium sulfate water A foreign matter detection spray composition comprising 5 to 20% by weight of a functional resin, 1 to 5% by weight of a dispersant, and 25 to 74% by weight of a diluent solvent is sprayed in advance on a packaged food. Te is the also you detect foreign substances such as the hair mixed in the packaging in food irradiated with X-rays.
また、本発明は、前記異物検出方法において、水溶性樹脂をアクリル酸エステル又はポバールとしたものである。 The present invention also provides a pre Kikoto object detecting method, in which the water-soluble resin was an acrylic acid ester or PVA.
また、本発明は、前記異物検出方法において、分散剤を二酸化ケイ素粉末としたものである。 The present invention also provides a pre Kikoto object detecting method, the dispersing agent is obtained by a silicon dioxide powder.
さらに、本発明は、前記異物検出方法において、希釈溶剤をアルコール又はアルコールと水との混合液としたものである。 Furthermore, the present invention provides a pre Kikoto object detecting method, in which the diluent was a mixture of an alcohol or alcohol and water.
本発明によれば、パック食品等の包装食品に混入した異物をＸ線の照射によって容易に検出することができるＸ線による異物検出方法を提供することができる。 ADVANTAGE OF THE INVENTION According to this invention, the foreign material detection method by X-ray which can detect easily the foreign material mixed in packaged foods, such as pack food, by X-ray irradiation can be provided.
従って、本発明の産業上利用性は非常に高いといえる。 Therefore, it can be said that the industrial applicability of the present invention is very high.
以下、本発明の実施の形態について説明する。 Hereinafter, embodiments of the present invention will be described.
本実施の形態におけるＸ線による異物検出用スプレー組成物は、組成剤と噴射剤との混
合容積比が液体状態で40：60〜70：30の割合で配合されている。そして、前記組成剤は硫酸バリウム20〜50重量％と水溶性樹脂５〜20重量％と分散剤１〜５重量％と希釈溶剤25〜74重量％とが配合されているものである。
Foreign object detection spray compositions according to X-rays definitive in this embodiment, 40 mixing volume ratio of the composition agent and propellant in a liquid state: 60 to 70: are blended with 30 ratio. The composition contains 20 to 50% by weight of barium sulfate, 5 to 20% by weight of a water-soluble resin, 1 to 5% by weight of a dispersant, and 25 to 74% by weight of a diluent solvent.
前記硫酸バリウムの配合量は組成剤全体量に対して20〜50重量％が適量であり、20重量％未満では、Ｘ線の遮蔽効果が低下するために複数回スプレーしなければならず、また、50重量％を越えれば、スプレー時に良好な霧が得られないので、好ましくない。 The blending amount of the barium sulfate is 20 to 50% by weight with respect to the total amount of the composition, and if it is less than 20% by weight, the X-ray shielding effect is reduced, and it must be sprayed several times. If it exceeds 50% by weight, a good mist cannot be obtained during spraying.
前記水溶性樹脂の配合量は組成剤全体量に対して５〜20重量％配合すれば、水やアルコールに容易に溶解し、乾燥後はべたつきがなく、また、柔軟性をもち、水やお湯で洗い流せるので、好ましく、５重量％未満では、毛髪等の対象物に密着しずらく硫酸バリウムが定着しないで剥離し易いので、好ましくなく、20重量％を越えれば、作業者の頭髪に噴霧する場合、当該頭髪にごわつきが発生して不快感を与えるので、好ましくない。当該水溶性樹脂は硫酸バリウムを毛髪等の対象物に定着させるものであり、アクリル酸エステルやポバール（ポリビニルアルコール）を使用すれば、噴霧剤のガスや硫酸バリウムとの相溶性がよく、頭髪にも使用できるので、好ましい。 If the blending amount of the water-soluble resin is 5 to 20% by weight based on the total amount of the composition, it dissolves easily in water and alcohol, does not become sticky after drying, has flexibility, water and hot water. Preferably, if it is less than 5% by weight, it is difficult to adhere to an object such as hair and barium sulfate is not fixed, and it is easy to peel off. If it exceeds 20% by weight, it is sprayed on the operator's hair. In such a case, the hair is unsteady and uncomfortable, which is not preferable. The water-soluble resin fixes barium sulfate to objects such as hair. If acrylic acid ester or poval (polyvinyl alcohol) is used, it has good compatibility with spray gas and barium sulfate, and it can be applied to hair. Can also be used.
前記分散剤は、硫酸バリウムと希釈溶剤と噴霧剤との大きな比重差を解消するために使用するものであり、二酸化ケイ素の超微粉を使用すれば、疎水性が良いので、好ましく、適量は組成剤全体量に対して１〜５重量％であり、１重量％未満では、硫酸バリウムが沈殿して使用時に異物検出用スプレー組成物の入ったエアゾール缶を振っても均一に分散できずに噴出口に詰まり易く、霧が均一な濃度にならないので、好ましくなく、５重量％を越えて配合しても更なる効果は得られず、毛髪等の対象物に密着しずらくなるので、好ましくない。 The dispersant is used to eliminate a large specific gravity difference among barium sulfate, a diluent solvent, and a propellant, and if ultrafine powder of silicon dioxide is used, it is preferable because the hydrophobicity is good. 1-5% by weight with respect to the total amount of the agent. If it is less than 1% by weight, barium sulfate is precipitated and sprayed without being dispersed evenly even if the aerosol can containing foreign matter detection spray composition is shaken at the time of use. It is not preferable because it tends to clog the outlet and the mist does not have a uniform concentration, and even if it exceeds 5% by weight, no further effect can be obtained and it is difficult to adhere to objects such as hair, which is not preferable. .
前記希釈溶剤としては、アルコール（例えば、エタノール、プロパノール、イソプロパノール、ブタノール等の低級アルコール）単独若しくはアルコールと水との混合液を使用すればよく、スプレー時の霧の状態や噴霧後の乾燥時間により選択すればよい。希釈溶剤の適量は組成剤全体量に対して25〜74重量％である。 As the dilution solvent, alcohol (for example, lower alcohol such as ethanol, propanol, isopropanol, butanol, etc.) alone or a mixture of alcohol and water may be used, depending on the state of mist during spraying and the drying time after spraying. Just choose. An appropriate amount of the diluent solvent is 25 to 74% by weight based on the total amount of the composition.
前記噴霧剤としては、ＬＰＧ（液化石油ガス）、ＬＰＧとＤＭＥ（ジメチルエーテル）との混合液化ガス又はＤＭＥを使用すればよく、前記希釈溶剤にアルコールを使用した場合にはＬＰＧを使用し、アルコールと水との混合液を使用した場合には水の量によって溶解性が悪くなるので、ＬＰＧとＤＭＥとの混合液化ガス又はＤＭＥを使用するのがよい。 As the propellant, LPG (liquefied petroleum gas), a mixed liquefied gas of LPG and DME (dimethyl ether) or DME may be used. When alcohol is used as the diluting solvent, LPG is used. When a mixed solution with water is used, the solubility becomes worse depending on the amount of water, so it is preferable to use a mixed liquefied gas of LPG and DME or DME.
組成剤と噴射剤との配合割合は混合容積比が液体状態で組成剤：噴射剤が40：60〜70：30の比になるようにすれば、適度なスプレー状態のエアゾールが得られるので、好ましく、組成剤が40容量％未満では、有効組成が少なくなると共に、噴霧剤が多くなるので、必要以上に霧が飛散し、実用に適さないから、好ましくなく、組成剤が70容量％を越えれば、噴霧剤が少なくなるので、組成物を霧状にしにくくなって棒状になったり、温度低下により噴霧しにくくなるから、好ましくない。 If the mixing volume ratio of the composition and propellant is such that the mixing volume ratio is in the liquid state and the composition: propellant ratio is 40:60 to 70:30, an aerosol in an appropriate spray state can be obtained. Preferably, if the composition is less than 40% by volume, the effective composition is decreased and the amount of the spray is increased. Therefore, the mist is scattered more than necessary, which is not suitable for practical use. In this case, the amount of the propellant is reduced, which is not preferable because the composition is difficult to be atomized to become a stick or difficult to spray due to a decrease in temperature.
前記異物検出用スプレー組成物は、先ず、硫酸バリウム20〜50重量％と水溶性樹脂５〜20重量％と分散剤１〜５重量％と希釈溶剤25〜74重量％とを均一に混合して組成剤原液を調合する。次いで、前記組成剤原液をスプレー缶に充填した後、噴霧用バルブを装着して固定し、組成剤と噴射剤との混合容積比が液体状態で40：60〜70：30の割合となるように噴射剤を前記スプレー缶に充填する。 The foreign matter detection spray composition is prepared by first uniformly mixing 20 to 50% by weight of barium sulfate, 5 to 20% by weight of a water-soluble resin, 1 to 5% by weight of a dispersant, and 25 to 74% by weight of a diluent solvent. A composition stock solution is prepared. Then, after filling the composition stock solution into a spray can, a spray valve is attached and fixed so that the mixing volume ratio of the composition to the propellant is 40:60 to 70:30 in the liquid state. The spray can is filled with the propellant.
本実施の形態によれば、前記異物検出用スプレー組成物をパック食品等の包装食品の製造工程において混入する可能性の高い異物となるものに前もってスプレーしておけば、当該包装食品に混入した異物をＸ線の照射により容易に検出することができ、特に、当該異物検出用スプレー組成物を食品包装工程における作業者の頭髪にスプレーすることにより、包装食品に混入した頭髪をＸ線の照射により容易に検出することができる。 According to the present embodiment, if the spray composition for detecting foreign matter is sprayed in advance to a foreign matter that is likely to be mixed in the manufacturing process of packaged food such as packed food, it is mixed into the packaged food. Foreign matter can be easily detected by X-ray irradiation, and in particular, by spraying the foreign substance detection spray composition onto the operator's hair in the food packaging process, the hair mixed in the packaged food is irradiated with X-rays. Can be easily detected.
硫酸バリウム20重量％、水溶性樹脂としてアクリル酸エステル15重量％、分散剤として二酸化ケイ素粉末３重量％及び希釈溶剤としてイソプロパノール62重量％配合した組成剤原液を調合してスプレー缶に充填した。続いて、噴射剤としてＬＰＧを用意した。そして、混合容積比が液体状態で組成剤原液：噴射剤が40：60の割合となるように該噴射剤を前記スプレー缶に充填してＸ線による異物検出用スプレー組成物を得た。 A composition stock solution containing 20% by weight of barium sulfate, 15% by weight of an acrylate ester as a water-soluble resin, 3% by weight of silicon dioxide powder as a dispersant and 62% by weight of isopropanol as a diluent was prepared and filled into a spray can. Subsequently, LPG was prepared as a propellant. The propellant was filled in the spray can so that the composition volume ratio was liquid and the composition stock solution: propellant ratio was 40:60 to obtain a spray composition for detecting foreign matter by X-ray.
硫酸バリウム35重量％、水溶性樹脂としてポバール20重量％、分散剤として二酸化ケイ素粉末１重量％及び希釈溶剤としてエタノール70重量部と水30重量部との混合液44重量％配合した組成剤原液を調合してスプレー缶に充填した。続いて、噴射剤としてＤＭＥを用意した。そして、混合容積比が液体状態で組成剤原液：噴射剤が50：50の割合となるように該噴射剤を前記スプレー缶に充填してＸ線による異物検出用スプレー組成物を得た。 A composition solution containing 35% by weight of barium sulfate, 20% by weight of PVA as a water-soluble resin, 1% by weight of silicon dioxide powder as a dispersant, and 44% by weight of a mixed solution of 70 parts by weight of ethanol and 30 parts by weight of water as a diluent solvent. Formulated and filled into spray cans. Subsequently, DME was prepared as a propellant. Then, the propellant was filled in the spray can so that the composition volume ratio was liquid and the ratio of the composition stock solution to the propellant was 50:50 to obtain a spray composition for detecting foreign matter by X-rays.
硫酸バリウム50重量％、水溶性樹脂としてポバール５重量％、分散剤として二酸化ケイ素粉末５重量％及び希釈溶剤としてイソプロパノール70重量部と水30重量部との混合液40重量％配合した組成剤原液を調合してスプレー缶に充填した。続いて、噴射剤としてＤＭＥ30重量部とＬＰＧ70重量部との混合液化ガスを用意した。そして、混合容積比が液体状態で組成剤原液：噴射剤が70：30の割合となるように該噴射剤を前記スプレー缶に充填してＸ線による異物検出用スプレー組成物を得た。 A composition solution containing 50% by weight of barium sulfate, 5% by weight of poval as a water-soluble resin, 5% by weight of silicon dioxide powder as a dispersant, and 40% by weight of a mixture of 70 parts by weight of isopropanol and 30 parts by weight of water as a diluent solvent. Formulated and filled into spray cans. Subsequently, a mixed liquefied gas of 30 parts by weight of DME and 70 parts by weight of LPG was prepared as a propellant. Then, the propellant was filled in the spray can so that the composition volume ratio was in a liquid state and the ratio of composition stock solution: propellant was 70:30 to obtain a spray composition for detecting foreign matter by X-rays.
硫酸バリウム20重量％、水溶性樹脂としてアクリル酸エステル５重量％、分散剤として二酸化ケイ素粉末１重量％及び希釈溶剤としてイソプロパノール70重量部と水30重量部との混合液74重量％配合した組成剤原液を調合してスプレー缶に充填した。続いて、噴射剤としてＤＭＥ70重量部とＬＰＧ30重量部との混合液化ガスを用意した。そして、混合容積比が液体状態で組成剤原液：噴射剤が60：40の割合となるように該噴射剤を前記スプレー缶に充填してＸ線による異物検出用スプレー組成物を得た。 A composition containing 20% by weight of barium sulfate, 5% by weight of an acrylic ester as a water-soluble resin, 1% by weight of silicon dioxide powder as a dispersant, and 74% by weight of a mixture of 70 parts by weight of isopropanol and 30 parts by weight of water as a diluent solvent. The stock solution was prepared and filled into a spray can. Subsequently, a mixed liquefied gas of 70 parts by weight of DME and 30 parts by weight of LPG was prepared as a propellant. Then, the propellant was filled in the spray can so that the composition volume ratio was liquid and the ratio of composition stock solution: propellant was 60:40 to obtain a spray composition for detecting foreign matter by X-ray.
硫酸バリウム50重量％、水溶性樹脂としてアクリル酸エステル20重量％、分散剤として二酸化ケイ素粉末５重量％及び希釈溶剤としてイソプロパノール25重量％配合した組成剤原液を調合してスプレー缶に充填した。続いて、噴射剤としてＬＰＧを用意した。そして、混合容積比が液体状態で組成剤原液：噴射剤が45：55の割合となるように該噴射剤を前記スプレー缶に充填しＸ線による異物検出用スプレー組成物を得た。 A composition stock solution containing 50% by weight of barium sulfate, 20% by weight of acrylic acid ester as a water-soluble resin, 5% by weight of silicon dioxide powder as a dispersant, and 25% by weight of isopropanol as a diluent was prepared and filled into a spray can. Subsequently, LPG was prepared as a propellant. Then, the propellant was filled into the spray can so that the composition volume ratio was liquid and the ratio of composition stock solution: propellant was 45:55 to obtain a spray composition for detecting foreign matter by X-ray.
比較例１：硫酸バリウム19重量％、水溶性樹脂としてアクリル酸エステル21重量％、分散剤として二酸化ケイ素粉末６重量％及び希釈溶剤としてイソプロパノール54重量％配合した組成剤原液を調合してスプレー缶に充填した。続いて、噴射剤としてＬＰＧを用意した。そして、混合容積比が液体状態で組成剤原液：噴射剤が39：61の割合となるように該噴射剤を前記スプレー缶に充填してスプレー組成物を得た。 Comparative Example 1: A stock solution containing 19% by weight of barium sulfate, 21% by weight of an acrylate ester as a water-soluble resin, 6% by weight of silicon dioxide powder as a dispersant, and 54% by weight of isopropanol as a diluent solvent was prepared into a spray can. Filled. Subsequently, LPG was prepared as a propellant. Then, the propellant was filled into the spray can so that the composition volume ratio was in a liquid state and the composition stock solution: propellant ratio was 39:61 to obtain a spray composition.
比較例２：硫酸バリウム51重量％、水溶性樹脂としてポバール４重量％、分散剤として二酸化ケイ素粉末0.9 重量％及び希釈溶剤としてイソプロパノール70重量部と水30重量部との混合液44.1重量％配合した組成剤原液を調合してスプレー缶に充填した。続いて、噴射剤としてＤＭＥを用意した。そして、混合容積比が液体状態で組成剤原液：噴射剤が71：29の割合となるように該噴射剤を前記スプレー缶に充填してスプレー組成物を得た。 Comparative Example 2: 51% by weight of barium sulfate, 4% by weight of poval as a water-soluble resin, 0.9% by weight of silicon dioxide powder as a dispersant, and 44.1% by weight of a mixed solution of 70 parts by weight of isopropanol and 30 parts by weight of water as a diluent solvent A composition stock solution was prepared and filled into a spray can. Subsequently, DME was prepared as a propellant. Then, the propellant was filled into the spray can so that the composition volume ratio was in a liquid state and the composition stock solution: propellant ratio was 71:29 to obtain a spray composition.
比較例３：硫酸バリウム19重量％、水溶性樹脂としてアクリル酸エステル４重量％、分散剤として二酸化ケイ素粉末２重量％及び希釈溶剤としてイソプロパノール70重量部と水30重量部との混合液75重量％配合した組成剤原液を調合してスプレー缶に充填した。続いて、噴射剤としてＤＭＥ50重量部とＬＰＧ50重量部との混合液化ガスを用意した。そして、混合容積比が液体状態で組成剤原液：噴射剤が35：65の割合となるように該噴射剤を前記スプレー缶に充填してスプレー組成物を得た。 Comparative Example 3: Barium sulfate 19% by weight, acrylic acid ester 4% by weight as water-soluble resin, silicon dioxide powder 2% by weight as dispersing agent, and 75% by weight of a mixture of 70 parts by weight of isopropanol and 30 parts by weight of water as a diluent solvent The blended composition stock solution was prepared and filled into a spray can. Subsequently, a mixed liquefied gas of 50 parts by weight of DME and 50 parts by weight of LPG was prepared as a propellant. Then, the propellant was filled into the spray can so that the composition volume ratio was in a liquid state and the composition stock solution: propellant ratio was 35:65 to obtain a spray composition.
比較例４：硫酸バリウム51重量％、水溶性樹脂としてポバール21重量％、分散剤として二酸化ケイ素粉末４重量％及び希釈溶剤としてイソプロパノール24重量％配合した組成剤原液を調合してスプレー缶に充填した。続いて、噴射剤としてＬＰＧを用意した。そして、混合容積比が液体状態で組成剤原液：噴射剤が75：25の割合となるように該噴射剤を前記スプレー缶に充填してスプレー組成物を得た。 Comparative Example 4: A composition solution containing 51% by weight of barium sulfate, 21% by weight of poval as a water-soluble resin, 4% by weight of silicon dioxide powder as a dispersant and 24% by weight of isopropanol as a diluent was prepared and filled into a spray can. . Subsequently, LPG was prepared as a propellant. Then, the propellant was filled into the spray can so that the composition volume ratio was liquid and the composition stock solution: propellant ratio was 75:25 to obtain a spray composition.
前記実施例１〜実施例５の各異物検出用スプレー組成物及び前記比較例１〜４の各スプレー組成物について、噴霧試験と異物検出試験とを行った。噴霧試験は、平板を壁面に取付け、該平板から垂直に30cm離れた位置からスプレーして、噴霧の飛散状態が直径７cm範囲内にあるか否かを目視により観察し、５秒間噴射した場合の硫酸バリウムが当該直径の中心部に多く、周辺部に少なく分散されて付着しているか否かについて目視により観察した。また、異物検出試験は、頭髪に噴霧した後、毛髪を抜いて該毛髪をスライスハムの中に入れてパックした第一サンプル包装食品と未処理の毛髪を入れた第二サンプル包装食品と毛髪の混入していない第三サンプル包装食品とを蛍光紙の上に載せて上方からＸ線を照射し、Ｘ線により発光した蛍光紙のＸ線透過画像を40万画素白黒ＣＣＤカメラ（Ｆ値：1.2 ）で撮像して目視により異物が視認できるか否かを確認した。なお、Ｘ線照射条件はＸ線管に60kV（管電流 3.5mA）の管電圧，１秒間印加によった。 A spray test and a foreign matter detection test were performed on each of the foreign matter detection spray compositions of Examples 1 to 5 and each of the spray compositions of Comparative Examples 1 to 4. In the spray test, a flat plate is attached to a wall surface, sprayed from a position 30 cm vertically from the flat plate, and whether or not the sprayed state is within a 7 cm diameter range is visually observed and sprayed for 5 seconds. It was visually observed whether or not barium sulfate was dispersed in a large amount at the center of the diameter and was dispersed and adhered to the periphery. In addition, the foreign matter detection test was performed by spraying hair onto the hair, removing the hair, putting the hair into sliced ham, and packing the first sample packaged food containing untreated hair and the second sample packaged food. A third sample packaged food that has not been mixed is placed on fluorescent paper and irradiated with X-rays from above. ) And confirmed whether or not a foreign object can be visually confirmed. The X-ray irradiation conditions were such that 60 kV (tube current 3.5 mA) was applied to the X-ray tube for 1 second.
前記実施例１〜実施例５の各異物検出用スプレー組成物はいずれも噴霧の飛散状態が直径７cm範囲内にあり、５秒間噴射した場合の硫酸バリウムは直径の中心部に多く、周辺部に少なく分散されて付着していた。 In each of the spray compositions for detecting foreign matter of Examples 1 to 5, the sprayed state is within a range of 7 cm in diameter, and barium sulfate when sprayed for 5 seconds is much in the center of the diameter, and in the periphery. A little dispersed and adhered.
また、実施例１〜実施例５の各異物検出用スプレー組成物を付着させた毛髪が混入した第一サンプル包装食品はいずれにおいても図１（No.1：第一サンプル包装食品における蛍光紙表面のＸ線透過画像を倍率１にて示す図面代用写真）に示すように容易に認識することができた。 In addition, the first sample packaged food mixed with the hair to which each of the foreign substance detection spray compositions of Examples 1 to 5 is mixed is shown in FIG. 1 (No.1: Fluorescent paper surface in the first sample packaged food) This X-ray transmission image was easily recognized as shown in a drawing-substituting photograph showing a magnification of 1.
前記比較例１，３の各スプレー組成物はいずれも噴霧の飛散状態が直径７cm範囲内にあり、５秒間噴射した場合の硫酸バリウムは直径の中心部に多く、周辺部に少なく分散されて付着していたが、当該各スプレー組成物を付着させた毛髪が混入した第一サンプル包装食品は図２（No.2：第二サンプル包装食品における蛍光紙表面のＸ線透過画像を倍率１にて示す図面代用写真）及び図３（No.3：第三サンプル包装食品における蛍光紙表面のＸ線透過画像を倍率１にて示す図面代用写真）に示すように第二・第三サンプル包装食品と同様に毛髪を認識することができなかった。なお、頭髪への噴霧時間を長くして滴る程に噴霧した毛髪においては確認することはできたが、頭髪の乾燥に長時間を要し、作業効率が大幅に低下すると共に、作業者に非常な不快感を与え、実用には到底適さないものであった。 In each of the spray compositions of Comparative Examples 1 and 3, the sprayed state is within a range of 7 cm in diameter, and barium sulfate when sprayed for 5 seconds is more concentrated in the center of the diameter and less dispersed in the periphery. However, the first sample packaged food mixed with the hair to which each of the spray compositions is attached is shown in FIG. 2 (No. 2: X-ray transmission image of fluorescent paper surface in the second sample packaged food at a magnification of 1 The second and third sample packaged foods as shown in FIG. 3 (No.3: No.3: the substitute photo for the X-ray transmission image of the fluorescent paper surface of the third sample packaged food at a magnification of 1) Similarly, the hair could not be recognized. Although it was possible to confirm that the hair was sprayed to the extent that it was dripped by extending the spraying time to the hair, it took a long time to dry the hair, which greatly reduced the work efficiency and was very It was unpleasant and unsuitable for practical use.
また、比較例２，４の各スプレー組成物はバリウムが沈殿して噴霧口にて目詰まりを起こし、噴霧の飛散状態も悪く、エアゾールとして実用に適さないものであった。 Further, each of the spray compositions of Comparative Examples 2 and 4 was not suitable for practical use as an aerosol because barium was precipitated and clogged at the spray port, and the sprayed state was poor.
パック食品等の包装食品内へ混入した異物をＸ線の照射によって検出するＸ線検査方法に利用することができる。 It can utilize for the X-ray inspection method which detects the foreign material mixed in packaged foods, such as pack food, by X-ray irradiation.
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