WO2013077287A1 - 感熱インジケーター - Google Patents
感熱インジケーター Download PDFInfo
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- WO2013077287A1 WO2013077287A1 PCT/JP2012/079941 JP2012079941W WO2013077287A1 WO 2013077287 A1 WO2013077287 A1 WO 2013077287A1 JP 2012079941 W JP2012079941 W JP 2012079941W WO 2013077287 A1 WO2013077287 A1 WO 2013077287A1
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01K—MEASURING TEMPERATURE; MEASURING QUANTITY OF HEAT; THERMALLY-SENSITIVE ELEMENTS NOT OTHERWISE PROVIDED FOR
- G01K11/00—Measuring temperature based upon physical or chemical changes not covered by groups G01K3/00, G01K5/00, G01K7/00 or G01K9/00
- G01K11/06—Measuring temperature based upon physical or chemical changes not covered by groups G01K3/00, G01K5/00, G01K7/00 or G01K9/00 using melting, freezing, or softening
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01K—MEASURING TEMPERATURE; MEASURING QUANTITY OF HEAT; THERMALLY-SENSITIVE ELEMENTS NOT OTHERWISE PROVIDED FOR
- G01K11/00—Measuring temperature based upon physical or chemical changes not covered by groups G01K3/00, G01K5/00, G01K7/00 or G01K9/00
- G01K11/12—Measuring temperature based upon physical or chemical changes not covered by groups G01K3/00, G01K5/00, G01K7/00 or G01K9/00 using changes in colour, translucency or reflectance
Definitions
- the present invention relates to a heat-sensitive indicator that irreversibly displays that a predetermined temperature has been reached.
- thermosensitive indicators that irreversibly displays that the temperature of the atmosphere has exceeded a predetermined temperature is used. By checking this thermal indicator, it can be confirmed whether the storage temperature has exceeded the upper limit of the control temperature during the transportation of the product or the like.
- heat sensitive indicators are described in, for example, Patent Documents 1 to 3 below.
- the thermosensitive indicators described in the following Patent Documents 1 to 3 include a colored hot-melt material that melts at a predetermined temperature and an absorbent that penetrates or absorbs the melt of the colored hot-melt material, such as a partition film. It is partitioned off without contacting each other by the partition member.
- the partition member When using such a heat-sensitive indicator, the partition member is destroyed below the melting temperature of the colored hot-melt material, the colored hot-melt material contacts the absorber, and the temperature of the atmosphere in which the heat-sensitive indicator is placed rises.
- the colored hot-melt material is melted by the above, the melted colored hot-melt material is absorbed by the absorber and colors the absorber. The coloring of the absorber does not disappear even if the temperature of the atmosphere in which the heat-sensitive indicator is placed falls below the melting point of the colored hot-melt material.
- JP-A-5-72054 Japanese Patent Laid-Open No. 6-50825 JP 2010-175350 A
- the temperature of the atmosphere in which the heat-sensitive indicator is placed has been raised above the melting temperature of the colored heat-fusible substance by checking the presence or absence of coloring of the absorber. Can be checked.
- the colored hot-melt material may gradually permeate the absorber to color the absorber. In such a case, the display of the heat sensitive indicator is erroneously displayed, causing erroneous determination.
- the present invention has been made to solve the above-mentioned problems, and at a temperature lower than the melting temperature of the colored hot-melt material, the colored hot-melt material is prevented from being absorbed by the absorber, and the colored hot-melt property is reduced. It is an object of the present invention to provide a heat-sensitive indicator capable of displaying an accurate temperature by reliably absorbing a melt of a colored hot-melt material into an absorber when a temperature equal to or higher than the melting temperature of the material is reached.
- the heat-sensitive indicator according to claim 1, which has been made to achieve the above object, is an elongated ampoule bottle in which a colored heat-sensitive material that melts at a predetermined temperature to become a colored melt is enclosed.
- the tubular body wound so as to be and the ampoule bottle are inserted and enclosed in a space surrounded by the impermeable film of the tubular body, and the color of the absorbent film is visible from the outside
- at least part of the ampoule bottle at a melting temperature of the colored heat-sensitive material or less, and at least part of the colored heat-sensitive material that is solid in the space surrounded by the impermeable film A part is discharged or ready to be discharged before the solid state When the colored heat-sensitive material is melted, the colored melt is absorbed from the
- the heat-sensitive indicator according to claim 2 is the heat-sensitive indicator according to claim 1, wherein the colored heat-sensitive material contains a coloring material in a hot-melt material that melts at a predetermined temperature.
- the heat-sensitive indicator according to claim 3 is the one according to claim 1 or 2, wherein the impervious film of the composite film is a metal film, and the absorbent film of the composite film is paper. It is characterized by being.
- the thermal indicator according to claim 4 is the one according to claim 3, wherein the metal film is an aluminum foil or an aluminum vapor deposition film.
- the thermal indicator according to claim 5 is the one according to claim 1 or 2, wherein the impervious film of the composite film is a resin film, and the absorbent film of the composite film is paper. It is characterized by being.
- the heat-sensitive indicator according to claim 6 is the one according to any one of claims 1 to 5, wherein the tube is a resin-made transparent tube, and at least a part of the ampoule bottle.
- the tube is elastically deformed when it is broken.
- the heat sensitive indicator described in claim 7 is the one described in any one of claims 1 to 6, wherein the ampoule bottle is made of glass.
- the heat-sensitive indicator according to claim 8 is the heat-sensitive indicator according to any one of claims 1 to 7, wherein an amount of the colored heat-sensitive material enclosed is a capacity when the colored melt is formed. Is an amount that is 1% or more of the capacity of the tube.
- the heat-sensitive indicator according to claim 9 is the one described in any one of claims 1 to 8, characterized in that the colored heat-sensitive material has a melting temperature of 10 ° C. at the highest. To do.
- the heat-sensitive indicator according to the present invention destroys at least a part of an ampoule bottle and places at least a part of a solid colored heat-sensitive material in a space surrounded by an impermeable film of a composite film that wraps the ampoule bottle. Discharge or ready for discharge. For this reason, the solid colored heat-sensitive material and the absorbent film of the composite film are in a non-contact state when the colored sensitive material is not melted, and the situation where the solid colored heat-sensitive material penetrates into the absorbent film can be prevented. . Thus, when the solid colored heat-sensitive material discharged into the space surrounded by the impervious film of the composite film is melted into a colored melt, the colored melt is a composite film.
- the heat-sensitive indicator according to the present invention colors the absorbent film for the first time. Therefore, the temperature of the atmosphere in which the heat-sensitive indicator is placed is the melting point of the colored heat-sensitive material. It is possible to reliably show the above, and the reliability can be improved.
- FIG. 1A is a longitudinal sectional view of the thermal indicator 10
- FIG. 1B is a transverse sectional view taken along the line XX shown in FIG. 1A.
- the heat-sensitive indicator 10 shown in FIG. 1 is formed by winding a composite film 15 so that an elongate glass ampoule bottle 12 in which a colored heat-sensitive material is sealed is laminated so that the vicinity of both ends overlaps each other. It is inserted into the space 14 a of the cylindrical body 14 and enclosed in a transparent resin tube 16. The colored heat-sensitive material sealed in the ampoule bottle 12 is melted at a predetermined temperature to become a colored melt.
- the ampule bottle 12 preferably has a diameter of 1 to 10 mm.
- the colored melt tends to be difficult to be discharged from the fold of the ampoule bottle 12 as described later, and in the ampoule bottle 12 having a diameter of more than 10 mm, the ampoule bottle 12 tends to be difficult to break. .
- the composite film 15 forming the cylindrical body 14 into which the ampoule bottle 12 is inserted is one surface of the impermeable film 15a in which the colored melt of the colored heat-sensitive material is impermeable.
- An absorptive film 15b that absorbs the colored melt is joined to the side. For this reason, the ampoule bottle 12 is inserted into the space 14a surrounded by the impermeable membrane 15a.
- the impermeable film 15a may be a resin film or a metal film, but by adopting a metal film, the thermal conductivity of the composite film 15 can be improved, and the thermal sensitivity of the thermal indicator 10 can be improved. It can be improved.
- the absorptive film 15b bonded to the one surface side of the impermeable film 15a may be a film that absorbs the colored melt, and paper, particularly filter paper, can be preferably used. Since the absorbent film 15b of the composite film 15 forms the outer peripheral surface of the cylindrical body 14, the color of the absorbent film 15b can be visually recognized from the outside of the transparent tube 16.
- the colored heat-sensitive material enclosed in the ampoule bottle 12 is one in which a coloring material is contained in a heat-meltable substance that melts at a predetermined temperature to be detected, particularly a predetermined temperature that exceeds the intended freezing or refrigeration temperature. It can be used suitably.
- This hot-melt material can be appropriately selected depending on the upper limit temperature of the temperature management atmosphere using the thermal indicator 10. For example, when the upper limit temperature of the temperature management atmosphere is room temperature or lower, a hot-melt material having a melting temperature of room temperature or lower can be employed so that the melting temperature of the colored heat-sensitive material is room temperature or lower. In particular, when the upper limit temperature of the temperature management atmosphere is a low temperature of 10 ° C.
- a hot-melt material having a melting temperature of 10 ° C. or lower can be employed so that the melting temperature of the colored heat-sensitive material is 10 ° C. or lower.
- the upper limit temperature of the temperature control atmosphere is 0 ° C.
- water can be adopted as the hot melt material
- the upper limit temperature of the temperature control atmosphere is ⁇ 12 ° C.
- ethylene glycol is used as the hot melt material.
- the upper limit temperature of the temperature control atmosphere is -18 ° C
- flaxseed oil is used as the hot melt material
- the upper limit temperature of the temperature control atmosphere is -11 ° C
- dibutyl sebacate is used as the hot melt material, and the temperature control atmosphere.
- 2-octanone can be adopted as the hot-melt material.
- the coloring material added to the hot-melt material is not particularly limited as long as it is dissolved or dispersed in the hot-melt material.
- natural coloring materials or synthetic coloring materials can be used.
- edible blue, and oil red RR, rose bengal, and the like can also be used.
- the amount of the colored heat-sensitive material enclosed in the ampoule bottle 12 is such that the capacity when the colored heat-sensitive material becomes a colored melt is 1% or more of the capacity of the tube 16 in which the ampoule bottle 12 is enclosed, especially 5 It is preferable that the amount be at least%.
- the amount of the colored heat-sensitive material enclosed in the ampoule bottle 12 is less than 1% of the capacity of the tube 16 when it becomes a colored melt, the outer side of the tube 16 indicates that the absorbent film 15b is colored. It tends to be difficult to see.
- the heat-sensitive indicator 10 shown in FIG. 1 breaks at least a part of the ampule bottle 12 at a melting temperature or lower of the colored heat-sensitive material enclosed in the ampule bottle 12 and is in a solid state. At least a part of the colored heat-sensitive material is discharged or brought into a dischargeable state.
- the ampoule bottle 12 is broken, the destructive force of the ampoule bottle 12 is applied through the tube 16, so that the tube 16 is also elastically deformed. However, when the destructive force is removed, the tube 16 is restored to its original shape. Returns to elasticity.
- the transparent resin for forming the tube 16 those having elasticity below the melting temperature of the colored heat-sensitive material can be used, and those having a glass transition point of 0 ° C. or less are preferable.
- a polypropylene resin or a polyethylene resin can be preferably used.
- the ampule bottle 12 can be easily broken by bending the straight tubular tube 16 together with the ampule bottle 12 and folding the ampule bottle 12.
- the thermal indicator 10 shown in FIG. 1 When the thermal indicator 10 shown in FIG. 1 is used, the thermal indicator 10 is placed in an atmosphere below the melting temperature of the colored thermal sensitive material and sealed in the ampule bottle 12 as shown in FIG.
- the colored heat-sensitive material is a solid colored heat-sensitive material 18a.
- FIG. 2B the straight tube 16 is bent together with the ampoule bottle 12 in the temperature controlled atmosphere, the ampoule bottle 12 is folded, and the space 14a of the cylindrical body 14 is colored solid.
- the heat sensitive material 18a is brought into a dischargeable state.
- the space 14a is surrounded by the impermeable film 15a of the composite film 14 as shown in FIG.
- the bent tube 16 bends without being bent, and when the bent force is removed, the tube 16 is elastically restored to the original straight tube shape.
- the solid colored heat-sensitive material 18a in a state in which the tube 16 returned to the straight shape can be discharged into the space 14a of the cylindrical body 14, and the colored melt is the cylindrical body. 14 is placed vertically in a temperature-controlled atmosphere so as to be in a position where it accumulates on the end face of 14. In such a state, the solid colored heat-sensitive material 18a is not in contact with the absorbent film 15b, and the color of the absorbent film 15b is visible from the outside of the tube 16 as shown in FIG. It can only be done.
- the ampoule bottle 12 when the ampoule bottle 12 is folded, a part of the solid colored heat-sensitive material 18a is broken into powder and / or lump, and powder and / or lump of colored heat from the fold of the ampoule bottle 12 is obtained.
- the sensitive material 18a may be discharged into the space 14a of the cylindrical body 14 in some cases. Even in this case, the powdery and / or massive colored heat-sensitive material 18a in the space 14a is in contact with the impermeable film 15a of the cylindrical body 14, but is not in contact with the absorbent film 15b. From the outside of the tube 16, only the color of the absorbent film 15b is visible as shown in FIG.
- the thermal indicator 10 shown in FIG. 2 (c) placed in the temperature controlled atmosphere is melted and colored as shown in FIG. 2 (d) when the temperature controlled atmosphere is equal to or higher than the melting temperature of the colored heat sensitive material 18a.
- the melt 18b accumulates in the vicinity of the end face of the cylindrical body 14 together with the massive colored heat-sensitive material 18a that has been melted and reduced in size.
- the colored melt 18b collected near the end face of the cylindrical body 14 also immerses the end of the absorbent film 15b. For this reason, the colored melt 18b is absorbed from the end of the absorbent film 15b to form the colored part 20 in the absorbent film 15b as shown in FIG.
- the colored portion 20 remains irreversibly even if the temperature management atmosphere becomes equal to or lower than the melting temperature of the colored heat-sensitive material 18a, and the temperature management atmosphere rises above the melting temperature of the solid colored heat-sensitive material 18a. Indicates that it has been warmed.
- the colored portion 20 can be sufficiently visually recognized from the outside of the tube 16 when the size is about 1/3 or more of the area of the absorbent film 15b.
- the solid colored heat-sensitive material 18a which can be discharged into the space 14a of the cylindrical body by folding the ampoule bottle 12, has its colored melt Only the liquid 18b is absorbed by the absorbent film 15b of the cylindrical body 14 and colors the absorbent film 15b. For this reason, the possibility of erroneous display due to the solid colored heat-sensitive material 18a penetrating into the absorbent film 15b can be eliminated, and the reliability of the heat-sensitive indicator 10 can be improved.
- the thermal indicator 10 shown in FIGS. 1 to 3 is placed vertically in a temperature controlled atmosphere, it may be placed horizontally.
- coloring of the absorptive film 15b is started from the part of the absorptive film 15b where both ends of the composite film 15 forming the cylindrical body 14 are laminated.
- the ampule bottle 12 is bent and folded together with the tube 16, but the ampule bottle 12 is crushed by hitting the tube 16 with a hammer or the like, and the powdered colored heat-sensitive material 18 a is removed from the ampule bottle 12 to the cylindrical body 14. It may be discharged into the space 14a.
- the solid colored heat-sensitive material 18a is in the form of particles, when the ampoule bottle 12 is folded as shown in FIG. 2 (b), it can be discharged from the fold into the space 14a of the cylindrical body 14. It is. Also in this case, the particulate colored heat-sensitive material 18a is in contact with the impervious film 15a of the tubular body 14 even when discharged into the space 14a of the tubular body 14, but the absorbent film 15b and From the outside of the tube 16, only the color of the absorbent film 15b is visible as shown in FIG.
- Example 1 A colored heat-sensitive material was prepared by adding 1 g of red pepper pigment as a coloring material to 100 g of linseed oil having a melting temperature of ⁇ 19 ° C. as a heat-melting substance. 0.45 ml of this colored heat-sensitive material was sealed in a glass ampoule bottle 12 (outer diameter 4 mm, length 55 mm). Next, an aluminum vapor deposition film as the impermeable film 15a is formed on one side of the paper as the absorbent film 15b on the transparent polyethylene resin tube 16 (inner diameter 5 mm, length 70 mm, inner volume about 1.3 ml).
- the formed aluminum vapor-deposited paper (25 mm ⁇ 50 mm) (off metal 55K manufactured by Takeo Co., Ltd.) is used as the composite film 15, and the composite film 15 is wound so that the aluminum vapor-deposited surface (the surface of the impermeable film 15a) is inside. It was inserted as a cylindrical body 14. Further, after inserting the glass ampoule bottle 12 in which the colored heat-sensitive material is sealed into the space 14a of the cylindrical body 14 in the tube 16, both ends of the tube 16 are heat-sealed and sealed to produce the heat-sensitive indicator 10. did. The amount of the colored heat-sensitive material enclosed in the ampule bottle 12 is about 35% with respect to the capacity of the tube 16.
- thermosensitive indicator 10 After pre-cooling the thermosensitive indicator 10 at ⁇ 28 ° C. for 2 hours, the tube 16 is bent and the ampoule bottle 12 is folded. As shown in FIG. 2 (c), the aluminum vapor deposition surface (surface of the impermeable film 15a) The temperature control was started so that the solid colored heat-sensitive material 18a could be discharged into the space 14a surrounded by the. At this point, the white color of the paper (absorbent film 15b) is only visible from the outside of the tube 16. Thereafter, after the ambient temperature of ⁇ 28 ° C. is raised by 1 ° C., it is allowed to stand for 1 hour in that state, and is again raised to 1 ° C.
- the color change temperature was defined as when the colored portion 20 in which an area of 1/3 or more of) was colored red was formed.
- the discoloration temperature of the thermosensitive indicator 10 was ⁇ 19 ° C., which was substantially equal to the melting temperature of linseed oil as a hot-melt material.
- Example 2 A heat-sensitive indicator 10 was produced in the same manner as in Example 1 except that ethylene glycol having a melting temperature of ⁇ 12.9 ° C. was used as the hot-melt material instead of the linseed oil as the hot-melt material in Example 1. did.
- the color change temperature of the produced thermosensitive indicator 10 was measured in the same manner as in Example 1.
- the color change temperature of the thermosensitive indicator 10 was ⁇ 13 ° C., which was substantially equal to the melting temperature of ethylene glycol.
- Example 3 Instead of linseed oil as the hot melt material of Example 1, water having a melting temperature of 0 ° C. is used as the hot melt material, and instead of the red pepper pigment as the coloring material, blue edible blue No. 2 A heat-sensitive indicator 10 was produced in the same manner as in Example 1 except that was used. The color change temperature of the produced thermosensitive indicator 10 was measured in the same manner as in Example 1. The color change temperature of the thermosensitive indicator 10 was 0 ° C., which was equal to the melting temperature of water.
- Example 4 The amount of the colored heat-sensitive material sealed in the ampule bottle 12 of Example 1 was changed from 0.45 ml (about 35% with respect to the capacity of the tube 16) to 0.1 ml (about 8% with respect to the capacity of the tube 16).
- a heat-sensitive indicator 10 was produced in the same manner as in Example 1 except that.
- the color change temperature of the produced thermosensitive indicator 10 was measured in the same manner as in Example 1.
- the color change temperature of the thermosensitive indicator 10 was ⁇ 19 ° C., which was not different from Example 1.
- thermosensitive indicator 10 was produced in the same manner as in Example 1 except that the tubular body 14 wound so that the film surface (the surface of the impermeable film 15a) was on the inside was inserted into the tube 16.
- the color change temperature of the produced thermosensitive indicator 10 was measured in the same manner as in Example 1.
- the color change temperature of the thermosensitive indicator 10 was ⁇ 19 ° C., which was not different from Example 1.
- Example 6 A heat-sensitive indicator 11 was produced in the same manner as in Example 1 except that water-resistant paper (Opa MMW100 manufactured by Nippon Papillia Paper Co., Ltd.) was used instead of the composite film 15 of Example 1. The color change temperature of the produced thermosensitive indicator 11 was measured in the same manner as in Example 1. The color change temperature of the thermal indicator 11 was ⁇ 19 ° C., which was not different from Example 1.
- Example 7 A heat-sensitive indicator 12 was produced in the same manner as in Example 6 except that isopropyl myristate having a melting temperature of 9 ° C. was used as the hot-melt material instead of the linseed oil as the hot-melt material in Example 6.
- the color change temperature of the produced thermosensitive indicator 12 was measured in the same manner as in Example 1.
- the color change temperature of the thermosensitive indicator 12 was 9 ° C., which was equal to the melting temperature of isopropyl myristate.
- Example 8 A heat-sensitive indicator 12 was produced in the same manner as in Example 6 except that diethyl sebacate having a melting temperature of 3 ° C. was used as the hot-melt material instead of the linseed oil as the hot-melt material in Example 6.
- the color change temperature of the produced thermosensitive indicator 12 was measured in the same manner as in Example 1.
- the color change temperature of the thermosensitive indicator 12 was 3 ° C., which was equal to the melting temperature of diethyl sebacate.
- Example 9 A heat-sensitive indicator 12 was produced in the same manner as in Example 6 except that dibutyl sebacate having a melting temperature of ⁇ 10 ° C. was used as the hot-melt material instead of the linseed oil as the hot-melt material in Example 6. .
- the color change temperature of the produced thermosensitive indicator 12 was measured in the same manner as in Example 1.
- the discoloration temperature of the thermosensitive indicator 12 was ⁇ 10 ° C., which was equal to the melting temperature of dibutyl sebacate.
- Example 10 A heat-sensitive indicator 12 was produced in the same manner as in Example 6 except that 2-octanone having a melting temperature of ⁇ 20 ° C. was used as the hot-melt material instead of the linseed oil as the hot-melt material in Example 6. .
- the color change temperature of the produced thermosensitive indicator 12 was measured in the same manner as in Example 1.
- the color change temperature of the thermal indicator 12 was -20 ° C., which was equal to the melting temperature of 2-octanone.
- thermosensitive indicator 10 was produced in the same manner as in Example 1 except that only the filter paper was used instead of the composite film 15 in Example 1.
- the color change temperature of the produced thermosensitive indicator 10 was measured in the same manner as in Example 1.
- the color change temperature of the heat sensitive indicator 10 was ⁇ 26 ° C., and the filter paper was discolored even when the colored heat sensitive material was solid. This is because the solid colored heat-sensitive material has permeated into the filter paper.
- thermosensitive indicator 10 In the same manner as in Example 1 except that the amount of the colored heat-sensitive material enclosed in the ampule bottle 12 of Example 1 was changed to 0.01 ml (about 0.8% with respect to the capacity of the tube 16), the heat-sensitive indicator 10 was made.
- the discoloration temperature of the produced thermosensitive indicator 10 was measured in the same manner as in Example 1. Although a slight red spot appeared on the paper of the composite film 14 (absorbent film 15b), the formation of the colored portion 20 was recognized. In addition, the color change temperature could not be determined.
- thermosensitive indicator according to the present invention can be suitably used for management of storage temperature of frozen foods and frozen foods, or temperature management of pharmaceuticals, blood, specimens, etc. in the medical field.
- 10 is a thermosensitive indicator
- 12 is an ampoule bottle
- 14 is a cylindrical body
- 14a is a space
- 15 is a composite membrane
- 15a is an impermeable membrane
- 15b is an absorptive membrane
- 16 is a tube
- 18a is a solid colored heat sensitive The material
- 18b is a colored melt
- 20 is a colored portion.
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Abstract
Description
熱溶融性物質としての溶融温度が-19℃のアマニ油100gに、着色材としての赤色の唐辛子色素1gを加えて着色熱感応材を調整した。この着色熱感応材0.45mlを、ガラス製のアンプル瓶12(外径4mm、長さ55mm)に封入した。次に、透明なポリエチレン樹脂製のチューブ16(内径5mm、長さ70mm、内容量約1.3ml)に、吸収性膜15bとしての紙の一面側に不透過性膜15aとしてのアルミ蒸着膜が形成されたアルミ蒸着紙(25mm×50mm)(竹尾株式会社製オフメタル55K)を複合膜15として用い、アルミ蒸着面(不透過性膜15aの面)が内側になるように複合膜15を巻いて筒状体14として挿入した。更に、チューブ16内の筒状体14の空間14aに、着色熱感応材を封入したガラスアンプル瓶12を挿入した後、チューブ16の両端部を加熱融着して密閉し、感熱インジケーター10を作製した。尚、着色熱感応材のアンプル瓶12への封入量は、チューブ16の容量に対して約35%である。
実施例1の熱溶融性物質としてのアマニ油に代えて、溶融温度が-12.9℃のエチレングリコールを熱溶融性物質に用いた他は実施例1と同様にして、感熱インジケーター10を作製した。作製した感熱インジケーター10の変色温度を、実施例1と同様にして測定した。この感熱インジケーター10の変色温度は-13℃であり、エチレングリコールの溶融温度と略等しかった。
実施例1の熱溶融性物質としてのアマニ油に代えて、溶融温度が0℃の水を熱溶融性物質に用い、且つ着色材としての赤色の唐辛子色素に代えて、青色の食用青色2号を用いた他は実施例1と同様にして、感熱インジケーター10を作製した。作製した感熱インジケーター10の変色温度を、実施例1と同様にして測定した。この感熱インジケーター10の変色温度は0℃であり、水の溶融温度と等しかった。
実施例1のアンプル瓶12への着色熱感応材の封入量を0.45ml(チューブ16の容量に対して約35%)から0.1ml(チューブ16の容量に対して約8%)に変更した他は実施例1と同様にして、感熱インジケーター10を作製した。作製した感熱インジケーター10の変色温度を、実施例1と同様にして測定した。この感熱インジケーター10の変色温度は-19℃であり、実施例1と変わらなかった。
実施例1の複合膜15に代えて、吸収性膜15bとしての濾紙の一面側に、不透過性膜15aとしてのポリエチレンフィルムを粘着材で貼着したラミネート加工紙を複合膜15に用い、ポリエチレンフィルム面(不透過性膜15aの面)が内側になるように巻いた筒状体14をチューブ16に挿入した他は実施例1と同様にして、感熱インジケーター10を作製した。作製した感熱インジケーター10の変色温度を、実施例1と同様にして測定した。この感熱インジケーター10の変色温度は-19℃であり、実施例1と変わらなかった。
実施例1の複合膜15に代えて、耐水紙(日本パピリア製紙株式会社製オーパーMMW100)を用いた他は実施例1と同様にして、感熱インジケーター11を作製した。作製した感熱インジケーター11の変色温度を、実施例1と同様にして測定した。この感熱インジケーター11の変色温度は-19℃であり、実施例1と変わらなかった。
実施例6の熱溶融性物質としてのアマニ油に代えて、溶融温度が9℃のミリスチン酸イソプロピルを熱溶融性物質に用いた他は実施例6と同様にして、感熱インジケーター12を作製した。作製した感熱インジケーター12の変色温度を、実施例1と同様にして測定した。この感熱インジケーター12の変色温度は9℃であり、ミリスチン酸イソプロピルの溶融温度と等しかった。
実施例6の熱溶融性物質としてのアマニ油に代えて、溶融温度が3℃のセバシン酸ジエチルを熱溶融性物質に用いた他は実施例6と同様にして、感熱インジケーター12を作製した。作製した感熱インジケーター12の変色温度を、実施例1と同様にして測定した。この感熱インジケーター12の変色温度は3℃であり、セバシン酸ジエチルの溶融温度と等しかった。
実施例6の熱溶融性物質としてのアマニ油に代えて、溶融温度が-10℃のセバシン酸ジブチルを熱溶融性物質に用いた他は実施例6と同様にして、感熱インジケーター12を作製した。作製した感熱インジケーター12の変色温度を、実施例1と同様にして測定した。この感熱インジケーター12の変色温度は―10℃であり、セバシン酸ジブチルの溶融温度と等しかった。
実施例6の熱溶融性物質としてのアマニ油に代えて、溶融温度が-20℃の2-オクタノンを熱溶融性物質に用いた他は実施例6と同様にして、感熱インジケーター12を作製した。作製した感熱インジケーター12の変色温度を、実施例1と同様にして測定した。この感熱インジケーター12の変色温度は―20℃であり、2-オクタノンの溶融温度と等しかった。
実施例1の複合膜15に代えて、濾紙のみを用いた他は実施例1と同様にして、感熱インジケーター10を作製した。作製した感熱インジケーター10の変色温度を、実施例1と同様にして測定した。この感熱インジケーター10の変色温度は-26℃であり、着色熱感応材が固体状であっても濾紙は変色した。固体状の着色熱感応材が濾紙内に浸透したことに因る。
実施例1のアンプル瓶12への着色熱感応材の封入量を0.01ml(チューブ16の容量に対して約0.8%)に変更した他は実施例1と同様にして、感熱インジケーター10を作製した。作製した感熱インジケーター10の変色温度を、実施例1と同様にして測定したが、複合膜14の紙(吸収性膜15b)にわずかに赤点が出現したものの、着色部20の形成は認められず、変色温度の判定はできなかった。
Claims (9)
- 所定温度で溶融して着色融液となる着色熱感応材が封入された細長のアンプル瓶と、前記着色熱感応材の着色融液が不透過の不透過性膜の一面側に、前記着色融液を吸収する吸収性膜が接合されている複合膜が、前記不透過性膜が内側となるように巻かれた筒状体と、前記アンプル瓶が前記筒状体の前記不透過性膜で囲まれた空間内に挿入されて封入され、前記吸収性膜の色彩が外側から視認可能のチューブとから構成され、
前記着色熱感応材の溶融温度以下で前記アンプル瓶の少なくとも一部を破壊して、前記不透過性膜で囲まれた空間内に固体状の前記着色熱感応材の少なくとも一部が排出し又は排出可能な状態とし、前記固体状の前記着色熱感応材が溶融したとき、前記着色融液が前記筒状体の端面に位置する前記吸収性膜の端部から吸収されて、前記吸収性膜に着色部が形成されていることを前記チューブの外側から視認できることを特徴とする感熱インジケーター。 - 前記熱感応材が、所定温度で溶融する熱溶融性物質に着色材が含有されていることを特徴とする請求項1に記載の感熱インジケーター。
- 前記複合膜の不透過膜が金属膜であり、前記複合膜の吸収性膜が紙であることを特徴とする請求項1又は請求項2に記載の感熱インジケーター。
- 前記金属膜が、アルミ箔又はアルミ蒸着膜であることを特徴とする請求項3に記載の感熱インジケーター。
- 前記複合膜の不透過膜が樹脂フィルムであり、前記複合膜の吸収性膜が紙であることを特徴とする請求項1又は請求項2に記載の感熱インジケーター。
- 前記チューブが、樹脂製の透明チューブであって、前記アンプル瓶の少なくとも一部を破壊する際に、前記チューブが弾性変形することを特徴とする請求項1~5のいずれか一項に記載の感熱インジケーター。
- 前記アンプル瓶が、ガラス製であることを特徴とする請求項1~6のいずれか一項に記載の感熱インジケーター。
- 前記着色熱感応材の封入量が、前記着色融液となったときの容量が前記チューブの容量の1%以上となる量であることを特徴とする請求項1~7のいずれか一項に記載の感熱インジケーター。
- 前記着色熱感応材の溶融温度が高くても10℃であることを特徴とする請求項1~8のいずれか一項に記載の感熱インジケーター。
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GB1410383.2A GB2511684B (en) | 2011-11-25 | 2012-11-19 | Heat-sensitive indicator |
US14/356,797 US8910585B2 (en) | 2011-11-25 | 2012-11-19 | Thermal indicator |
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JPH0650825A (ja) | 1992-08-03 | 1994-02-25 | Nichiyu Giken Kogyo Kk | 感熱インジケータ |
JPH0843224A (ja) * | 1994-08-01 | 1996-02-16 | Matsushita Electric Ind Co Ltd | 圧力検知装置 |
JPH1062269A (ja) * | 1996-08-22 | 1998-03-06 | Asahi Electric Works Ltd | 過熱検出表示装置 |
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JPS5032980A (ja) * | 1973-07-23 | 1975-03-29 | ||
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JP2016057273A (ja) * | 2014-09-12 | 2016-04-21 | 株式会社サクラクレパス | 感熱インジケータ |
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CN103998907A (zh) | 2014-08-20 |
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