WO2009130831A1 - 感温インジケータ及び感温インジケータ装置 - Google Patents
感温インジケータ及び感温インジケータ装置 Download PDFInfo
- Publication number
- WO2009130831A1 WO2009130831A1 PCT/JP2009/000584 JP2009000584W WO2009130831A1 WO 2009130831 A1 WO2009130831 A1 WO 2009130831A1 JP 2009000584 W JP2009000584 W JP 2009000584W WO 2009130831 A1 WO2009130831 A1 WO 2009130831A1
- Authority
- WO
- WIPO (PCT)
- Prior art keywords
- temperature
- capsule
- sensitive indicator
- temperature sensitive
- indicator
- Prior art date
Links
- 239000002775 capsule Substances 0.000 claims abstract description 84
- 239000000463 material Substances 0.000 claims abstract description 53
- 238000003825 pressing Methods 0.000 claims abstract description 40
- 239000004033 plastic Substances 0.000 claims abstract description 13
- 229920003023 plastic Polymers 0.000 claims abstract description 13
- 230000002745 absorbent Effects 0.000 claims description 13
- 239000002250 absorbent Substances 0.000 claims description 13
- 239000007791 liquid phase Substances 0.000 claims description 11
- 239000000126 substance Substances 0.000 claims description 8
- 230000000994 depressogenic effect Effects 0.000 claims description 6
- 239000002562 thickening agent Substances 0.000 claims description 4
- 238000007789 sealing Methods 0.000 abstract description 2
- 239000011540 sensing material Substances 0.000 abstract 3
- 239000000047 product Substances 0.000 description 29
- 239000000049 pigment Substances 0.000 description 10
- 238000010521 absorption reaction Methods 0.000 description 8
- 239000000853 adhesive Substances 0.000 description 8
- 230000001070 adhesive effect Effects 0.000 description 8
- 239000000975 dye Substances 0.000 description 8
- 229930195733 hydrocarbon Natural products 0.000 description 8
- 150000002430 hydrocarbons Chemical class 0.000 description 8
- 238000004040 coloring Methods 0.000 description 7
- 239000004215 Carbon black (E152) Substances 0.000 description 5
- 238000004519 manufacturing process Methods 0.000 description 5
- 239000000499 gel Substances 0.000 description 4
- 238000007726 management method Methods 0.000 description 4
- 239000000203 mixture Substances 0.000 description 4
- 229920000139 polyethylene terephthalate Polymers 0.000 description 4
- 239000005020 polyethylene terephthalate Substances 0.000 description 4
- 239000000243 solution Substances 0.000 description 4
- 238000003860 storage Methods 0.000 description 4
- 238000000465 moulding Methods 0.000 description 3
- 230000002093 peripheral effect Effects 0.000 description 3
- 239000012466 permeate Substances 0.000 description 3
- 239000000758 substrate Substances 0.000 description 3
- 229920003002 synthetic resin Polymers 0.000 description 3
- 239000000057 synthetic resin Substances 0.000 description 3
- 238000009834 vaporization Methods 0.000 description 3
- 230000008016 vaporization Effects 0.000 description 3
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 3
- 241000208822 Lactuca Species 0.000 description 2
- 235000003228 Lactuca sativa Nutrition 0.000 description 2
- 239000004820 Pressure-sensitive adhesive Substances 0.000 description 2
- 244000061456 Solanum tuberosum Species 0.000 description 2
- 235000002595 Solanum tuberosum Nutrition 0.000 description 2
- 230000004308 accommodation Effects 0.000 description 2
- 235000013527 bean curd Nutrition 0.000 description 2
- 235000013405 beer Nutrition 0.000 description 2
- 235000014171 carbonated beverage Nutrition 0.000 description 2
- 238000009833 condensation Methods 0.000 description 2
- 230000005494 condensation Effects 0.000 description 2
- -1 cut flowers Substances 0.000 description 2
- 238000009826 distribution Methods 0.000 description 2
- 239000003814 drug Substances 0.000 description 2
- 238000001035 drying Methods 0.000 description 2
- 238000005562 fading Methods 0.000 description 2
- 235000013305 food Nutrition 0.000 description 2
- 230000008595 infiltration Effects 0.000 description 2
- 238000001764 infiltration Methods 0.000 description 2
- 239000012528 membrane Substances 0.000 description 2
- 230000035515 penetration Effects 0.000 description 2
- 239000004065 semiconductor Substances 0.000 description 2
- 238000007493 shaping process Methods 0.000 description 2
- 239000007790 solid phase Substances 0.000 description 2
- 239000006104 solid solution Substances 0.000 description 2
- 241000894006 Bacteria Species 0.000 description 1
- 229920002799 BoPET Polymers 0.000 description 1
- VYPSYNLAJGMNEJ-UHFFFAOYSA-N Silicium dioxide Chemical compound O=[Si]=O VYPSYNLAJGMNEJ-UHFFFAOYSA-N 0.000 description 1
- 238000004891 communication Methods 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 238000006073 displacement reaction Methods 0.000 description 1
- 230000007613 environmental effect Effects 0.000 description 1
- 235000013611 frozen food Nutrition 0.000 description 1
- 230000007774 longterm Effects 0.000 description 1
- 230000007257 malfunction Effects 0.000 description 1
- 239000000155 melt Substances 0.000 description 1
- 238000002844 melting Methods 0.000 description 1
- 230000008018 melting Effects 0.000 description 1
- 238000002156 mixing Methods 0.000 description 1
- 238000012544 monitoring process Methods 0.000 description 1
- 239000011148 porous material Substances 0.000 description 1
- 239000000843 powder Substances 0.000 description 1
- 238000003908 quality control method Methods 0.000 description 1
- 230000000630 rising effect Effects 0.000 description 1
- 229920006395 saturated elastomer Polymers 0.000 description 1
- 230000035945 sensitivity Effects 0.000 description 1
- 239000000741 silica gel Substances 0.000 description 1
- 229910002027 silica gel Inorganic materials 0.000 description 1
- 239000007779 soft material Substances 0.000 description 1
- 230000000007 visual effect Effects 0.000 description 1
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Images
Classifications
-
- 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
Definitions
- the present invention relates to a temperature-sensitive indicator and a temperature-sensitive indicator device that are shown irreversibly in order to leave a history that the temperature has become equal to or higher than a predetermined temperature, and in particular, has it been exposed to an environment that is equal to or higher than a predetermined temperature?
- the present invention relates to a temperature sensitive indicator and a temperature sensitive indicator device that can visually recognize whether or not.
- a display core 53 is placed on the upper end surface of the wall 51a. Further, the upper surface of the display core 53 and the outer peripheral surface of the wall 51 a are covered with a cap 54.
- the cap 54 is formed in a convex shape, a so-called dome shape, and is formed such that the center portion is depressed into a concave shape when a certain external force is applied. Further, the display core 53 is held between the cap 54 and the wall portion 51a, and the display core 53 is held.
- An adhesive 55 is formed on the back surface of the substrate 51, and a release liner 56 is provided so as to cover the adhesive 55.
- the release liner 56 is peeled off, the base 51 is attached to a product or product, and then the central portion of the cap 54 is pushed in with a finger, and the display core 53 is inserted into the porous pad 52. Contact.
- the dye of the porous pad 52 changes from the solid phase to the liquid phase, and the colored chemical substance becomes the display core 53 and the porous material. Due to the concentration gradient between the pads 52, the porous pads 52 move to the display core 53.
- the concentration gradient between the pads 52 the porous pads 52 move to the display core 53.
- a temperature sensitive indicator in which a temperature sensitive material is encapsulated has been proposed.
- This temperature sensitive indicator will be described with reference to FIGS.
- a temperature-sensitive indicator 60 is obtained by mixing a base 61 and an oil-soluble pigment, pigment or dye placed on the base 61 into a linear hydrocarbon or a mixture composed of a linear hydrocarbon.
- a capsule 62 containing a thing (so-called colored wax) and a filter paper 63 provided so as to cover the capsule 62 are provided.
- this temperature sensitive indicator 60 When using this temperature sensitive indicator 60, the capsule 61 is pressed from above the filter paper 63 with a finger, and the capsule 62 is crushed. As a result, when the temperature exceeds a predetermined temperature, the colored wax dissolves and the oil-soluble pigment, pigment or dye penetrates into the filter paper. Therefore, by visually recognizing the coloring state of the filter paper 62, it can be determined whether or not the product or the like has been exposed to an environment of a predetermined temperature or higher even once.
- the capsule is merely placed on a flat substrate, there is a problem that when the capsule is pressed with a finger, for example, the capsule escapes and it is difficult to destroy the capsule. .
- the temperature of the finger may be detected and the filter paper may be colored, and there is a possibility that it is erroneously determined that the product has been exposed to an environment of a predetermined temperature or higher.
- the colored wax is vaporized even after the capsule is broken and the temperature sensitive indicator is activated.
- the transparent sheet which consists of a plastic material which covers the upper surface of the said display label.
- a transparent sheet for example, a laminate seal
- the temperature sensitive material absorbed by the absorbing member can be protected from ultraviolet rays, fading, drying, vaporization, and the like. Further, it is possible to prevent moisture from entering the absorbing member from the outside, and it is possible to prevent condensation at a low temperature in the absorbing member.
- One end portion of the absorbing member is placed on the upper portion of the concave portion containing the capsule, and the through hole of the display label is formed toward the outer periphery of the display label except for the upper portion of the concave portion. It is desirable.
- the absorbing member is formed in an elongated shape, and one end portion of the absorbing member is placed on the upper portion of the concave portion containing the capsule, and the through hole of the display label excludes the upper portion of the concave portion, You may make it form along the longitudinal direction of the said absorption member.
- it is preferable that a plurality of the through holes of the display label are formed at a predetermined distance. With such an absorbing member, the colored state of the absorbing member can be confirmed through the through-hole.
- the distance of the colored portion from the position where the capsule is placed (if a plurality of through-holes are arranged, the colored through According to the positions of the holes), it is possible to easily identify the time of exposure to an environment of a predetermined temperature or higher or a predetermined temperature or lower. Further, even if the temperature sensitive material dissolves below the predetermined temperature and the upper part of the concave portion in which the capsule is accommodated is colored, the display window of the display label is separated from the concave portion. Therefore, it is possible to prevent the product from being erroneously recognized as being exposed to an environment of a predetermined temperature or higher.
- the temperature sensitive material or the capsule is preferably colored or colored with a predetermined color.
- a color to be colored is set for each type of temperature sensitive material (set temperature, set lineup).
- set temperature, set lineup it is possible to easily identify by visual observation whether the capsule or the temperature sensitive material is a product that operates at many times.
- it since it can be easily identified, it is possible to prevent misconfiguration of workers not only in the consumer but also in the manufacturing process.
- coloring a capsule you may apply
- the capsule may have a double structure, and only the outer capsule (wall or membrane) may be colored.
- the temperature sensitive indicator apparatus concerning this invention is equipped with the said temperature sensitive indicator and the case which accommodates the said temperature sensitive indicator, and the said temperature sensitive indicator is mounted in the said case.
- the capsule is broken by pressing the capsule by the pressing means, and the capsule is broken by reducing the influence of the temperature of the finger to be pressed. it can. Further, since the capsule is sealed in the concave portion of the main body base made of a plastic material, and the pressing portion is located immediately above the concave portion, a strong pressing force is applied to the concave portion via the display panel and the absorbing member. For this reason, a crevice can be crushed easily and it can destroy reliably, without escaping a capsule.
- the pressing means is a pressing portion projecting downward formed in a central portion of the cover formed in a convex dome shape that can be depressed, and the cover is depressed so that the capsule is It is desirable to destroy the capsule by pressing with the pressing portion.
- the pressing means is a pressing portion projecting downward formed in a central portion of the cover formed in a convex dome shape that can be depressed, and the cover is depressed so that the capsule is It is desirable to destroy the capsule by pressing with the pressing portion. In this way, by forming the pressing means on the cover, the number of parts can be reduced and heat can be produced at low cost while insulating the heat of the finger.
- the temperature-sensitive indicator has one or a plurality of protrusions that are formed on a cover that covers the temperature-sensitive indicator or that protrudes toward the inner space of the cover that is provided separately, and the protrusions serve as the temperature-sensitive indicator.
- the temperature sensitive indicator is locked and held in the case. In this way, by holding the temperature-sensitive indicator with the protrusion formed on the cover or provided separately, the capsule due to the curvature of the temperature-sensitive indicator when the temperature-sensitive indicator is pressed by the pressing means, etc. It is possible to prevent the displacement of the sealed recess.
- the capsule can be easily broken when using the temperature sensitive indicator including the capsule containing the temperature sensitive material. By being affected by temperature, it is possible to prevent erroneous recognition that the product has been exposed to an environment of a predetermined temperature or higher.
- FIGS. 1 to 3 is an exploded perspective view showing a temperature sensitive indicator device according to one embodiment of the present invention
- FIG. 2 is a cross-sectional view showing a state before the temperature sensitive indicator device shown in FIG. 1 is installed
- FIG. It is sectional drawing which shows the state after the setting of the temperature sensitive indicator apparatus shown in FIG.
- the temperature-sensitive indicator device 1 includes a disk-shaped (plate-shaped) base 2 that serves as a base, a temperature-sensitive indicator 3 placed on the top of the base 2, and the temperature-sensitive indicator 3.
- Transparent synthetic resin for example, formed by a hat (rimmed hat) shape to cover the whole from above, and its edge (horizontal part) is joined to the edge of the base body 2 (for example, by ultrasonic welding)
- an adhesive or adhesive material is preferably formed on the back surface of the base 2 serving as a base in order to securely attach the temperature sensitive indicator device 1 to a product or product.
- a release paper (not shown) is provided on the adhesive and the pressure-sensitive adhesive material, and that the release paper is peeled off when used.
- the temperature-sensitive indicator 3 includes a main body base 4 made of a plastic material (for example, a PET film) in which a concave portion 4a is formed at a central portion, a capsule 5 that is contained in the concave portion 4a and contains a temperature-sensitive material, The elongated absorbent member 6 placed on the upper part of the recess 4a, a plurality of the cover 5 covering the absorbent member 6 and sealing the capsule 5 in the recess 4a, and a part of the upper surface of the absorbent member 6 is exposed. Display window 7a (through hole).
- a plastic material for example, a PET film
- the absorbing member 6 and the temperature sensitive material absorbed by the absorbing member 6 can be protected from ultraviolet rays, fading, drying, vaporization, and the like. Moreover, it can prevent that a water
- the temperature sensitive indicator 3 can be used alone, by using the case made of the base 2 and the cover 9, the capsule containing the temperature sensitive material can be more easily broken, The melting of the temperature sensitive material due to the temperature of the finger can be reliably prevented.
- the temperature sensitive indicator 3 is used alone without being covered with the cover 9, it is desirable to form an adhesive or an adhesive on the lower surface of the main body base 4. At that time, it is preferable that a release paper (not shown) is provided on the adhesive and the pressure-sensitive adhesive material, and that the release paper is peeled off when used.
- the temperature-sensitive indicator 3 will be described in more detail.
- the main body base 4 is formed in a circular shape in plan view, and a recess 4a for accommodating the capsule 5 is formed in the center thereof, so that the periphery of the main body base 4 is formed. It has an annular horizontal portion 4b. As shown in the drawing, the elongated absorbing member 6 is placed on the upper portion of the horizontal portion 4b along the radial direction of the main body base 4 so that one end portion thereof is positioned on the upper portion of the capsule 5.
- the horizontal part 4b of the base body 4 and the lower surface of the display label 7 are bonded together, whereby the absorbing member 6 is sandwiched in a sandwich shape, so that the absorbing member 6 is prevented from falling off and displaced, and the capsule 5 Is sealed in the recess 4a.
- the upper surface of the absorbent member 6 is exposed from a plurality of (three in the figure) display windows 7a provided at a predetermined distance along the radial direction of the display label 7 (that is, the longitudinal direction of the absorbent member 6). It is made to do.
- a plurality of display windows 7a are provided as a preferred example.
- the display window is replaced with the plurality of display windows 7a.
- One through hole formed elongated along the absorbing member 6 may be used.
- the display window 7a is not provided on the upper portion of the recess 4a as shown in FIG. With such a configuration, even when the capsule 5 is broken, the temperature sensitive material dissolves below a predetermined temperature, and even if one end of the absorbent member 6 (the portion covering the recess 4a) is colored, the display window 7a Therefore, coloring of the absorbing member 6 is not visible, and erroneous recognition can be prevented. Further, when a portion (absorbing member 4) visible from the display window 7a is colored (colored) on the upper surface of the display label 7, a cautionary note indicating that the display label 7 has been placed in an environment of a predetermined temperature or higher. Is described.
- the capsule 5 or the temperature sensitive material contained therein is colored or colored with a predetermined color. For example, by setting the color to be colored for each type of temperature-sensitive material (set temperature, set-up lineup), it is easy to visually identify how many times the capsule 5 or temperature-sensitive material operates. Can do. In addition, since it can be easily identified, it is possible to prevent misconfiguration of workers not only in the consumer but also in the manufacturing process.
- a coloring material may be applied after the capsule is molded, or the material may be colored by adding a colored powder during the capsule molding.
- the capsule may have a double structure, and only the outer capsule (wall or membrane) may be colored.
- the temperature-sensitive material contained in the capsule 5 is, for example, a so-called colored wax in which oil-soluble pigments, pigments or dyes are mixed in a linear hydrocarbon or a mixture composed of a linear hydrocarbon. Can do. It is desirable to mix a thickener with the colored wax. In this case, variation in the permeation characteristics of the wax in the liquid phase into the absorbing member 6 can be suppressed.
- a thickener for example, Septon (registered trademark) having good compatibility with wax can be used.
- the temperature sensitive material may be a chemical substance that does not dissolve in water but melts and changes color at a predetermined temperature. In the following description, a colored wax will be described as an example.
- the absorption member 6 should just be what can absorb a temperature sensitive material, and conventionally used filter paper, a porous body (a film, sponge, etc.), a silica gel, etc. can be used.
- the cover 9 is formed in a hat shape as described above, and has a convex portion 9a covering the entire temperature sensitive indicator 3, and an annular horizontal portion 9b formed around the convex portion 9a.
- the convex portion 9a will be described in more detail.
- the convex portion 9a includes an upright portion 9c that rises substantially vertically from the horizontal portion 9b, and a shoulder portion 9d that has an arcuate cross section formed at the top of the upright portion 9c.
- a so-called dome-shaped inclined surface portion 9e rising from the shoulder portion 9d toward the center portion and a pressing portion 9f (pressing means) provided so as to protrude downward in the center of the inclined surface portion 9e are provided.
- the inclined surface portion 9e When the external force from above acts, the inclined surface portion 9e is formed so as to be depressed and deformed from a convex shape to a concave shape as shown in FIG.
- a communication hole (not shown) is provided in the joint between the horizontal portion 9b of the cover 9 and the edge portion of the base body 2 so as to extract air from the accommodation space of the temperature sensitive indicator 3, and thereby the inclined surface portion 9e. After being depressed and deformed into a concave shape, it is designed not to return.
- the said communicating hole is formed in the diameter from which a water
- the pressing portion 9f on the inclined surface portion 9e that can be deformed by depression, it is possible to give a feeling of snapping when the pressing portion 9f is pushed in with a finger, and the capsule 5 is surely secured by the reversal force of the inclined surface portion 9e. Can be destroyed by pressing. Further, by forming the pressing portion 9f on the cover 9 as described above, the number of parts can be reduced and the manufacturing can be made at low cost.
- the temperature sensitive indicator 3 is covered with the convex portion 9a.
- the outer peripheral portion of the temperature sensitive indicator 3 is locked to the inner peripheral surface of the upright portion 9c.
- the temperature sensitive indicator 3 is positioned, and the pressing portion 9 f of the cover 9 is configured to be positioned above the central portion of the display label 7.
- one or a plurality of (three in the figure) projections 9g projecting toward the accommodation space of the temperature sensitive indicator 3 (the space in the cover 9) are formed on the shoulder 9d of the cover 9. The protrusion 9 g is locked to the upper surface of the temperature sensitive indicator 3, and the temperature sensitive indicator 3 is held in the cover 9.
- the depression 4a in which the capsule 5 is sealed is caused by the curvature of the temperature sensitive indicator 3 when the temperature sensitive indicator 3 is pressed by the pressing portion 9f. Misalignment can be prevented.
- the display label 7 is pressed as shown in FIG. 3 by pushing the pressing portion 9f of the cover 9 downward with a finger.
- the central part of the slab is pushed downward, the recess 4a made of a plastic material is easily crushed, and the capsule 5 is destroyed.
- the cover 9 is formed of a transparent member so that the colored (colored) state of the absorbing member 6 can be easily visually recognized from above via the display window 7a.
- the temperature sensitive indicator device 1 configured as described above is stored in the state shown in FIG. In this state, since the colored wax is covered with the capsule 5, even when exposed to an environment of a predetermined temperature or higher, the colored wax is prevented from being vaporized and does not penetrate into the absorbing member 6. Long-term transportation and storage at room temperature are possible, and product defects due to malfunctions are suppressed.
- the pressing portion 9f is pressed from above the cover 9 with a finger, the inclined surface portion 9e is deformed into a concave shape, and the pressing portion 9f is moved downward. Let With the downward movement of the pressing portion 9f, the temperature sensitive indicator 3 is pressed against the base 2, the main body base 4a is crushed, the capsule 5 is destroyed, and the set state is established.
- the capsule 5 is sealed in the recess 4a of the main body base 4 made of a plastic material, and the pressing portion 9f is positioned immediately above the recess 4a.
- a strong pressing force is applied to the recess 4 a through 6. For this reason, the recessed part 4a is easily crushed and can be reliably destroyed without escaping the capsule 5.
- the pressing portion 9f has a shape protruding downward from the center of the inclined surface portion 9e of the cover 9 and is formed of a heat insulating member. Heat transfer is prevented. Even if the temperature sensitive indicator 3 is used (set) directly on the product without using the cover 9, the display window 7 a of the display label 7 remains in the capsule 5 even if the colored wax dissolves to some extent at a temperature lower than the predetermined temperature. Is away from the recessed portion 4a in which is stored, the coloring is not visible from the display window 7a, and erroneous recognition can be prevented.
- the absorbing member 6 has an elongated shape and a plurality of display windows 7a are formed along the longitudinal direction thereof, the colored state changes in order from the display window 7a close to the position of the capsule 5 with time (see FIG. 4 (c) infiltration part 6a). That is, the colored wax begins to solidify after being exposed to the predetermined temperature or higher and then the permeation is stopped, and the environment of the predetermined temperature or higher is obtained by observing the colored state of each display window 7a. The exposure time can be easily identified. In addition, in the case where the temperature becomes equal to or lower than the predetermined temperature after being exposed to the predetermined temperature or more, the colored wax repeatedly permeates and stops in the absorbent member 6 each time. You can also know.
- the temperature-sensitive indicator using a colored gel that becomes a liquid phase at a predetermined temperature or lower should be suitably used for products and products whose quality deteriorates when frozen, such as lettuce, potato, tofu, and carbonated beverage (beer). Can do.
- the cover 9 is made of a transparent synthetic resin.
- the cover 9 is made of a synthetic resin having a characteristic of becoming clouded or clouded at a predetermined temperature or higher, such as A-PET (amorphous PET).
- A-PET amorphous PET
- the cover 9 itself can also be used as a temperature sensitive indicator.
- the cover 9 is clouded when the environmental temperature at which the temperature sensing indicator device 1 is installed becomes equal to or higher than a predetermined temperature, so that two temperature managements including temperature management by the temperature sensing indicator 3 are possible.
- the absorption member 6 showed what was formed in elongate shape, in the temperature sensitive indicator which concerns on this invention, it is not limited to elongate shape. That is, one end portion of the absorbing member 6 is placed on the upper portion of the concave portion 4a in which the capsule 5 is accommodated, and the through hole of the display label 7 is directed toward the outer periphery of the display label 7 except for the upper portion of the concave portion 4a. As long as it is formed.
- a member formed in a spiral shape can be used as the absorbent member 6 formed as described above. In this case, the central portion of the absorbent member 6 is placed on the upper portion of the concave portion 4 a that houses the capsule 5.
- the temperature-sensitive indicator according to the present invention is suitably used in the fields of production, distribution and storage of products, products, etc. that require temperature control, such as fresh foods, frozen foods, cut flowers, pharmaceuticals, and semiconductor materials.
- FIG. 1 is an exploded perspective view showing a temperature sensitive indicator device according to an embodiment of the present invention.
- 2 is a cross-sectional view showing a state before setting of the temperature-sensitive indicator device shown in FIG.
- FIG. 3 is a cross-sectional view showing a state after the temperature-sensitive indicator device shown in FIG. 1 is set.
- FIG. 4 is a cross-sectional view illustrating a state in which the colored wax permeates the absorbent member in the temperature-sensitive indicator device after setting illustrated in FIG. 3.
- FIG. 5 is a cross-sectional view showing a conventional temperature sensitive indicator.
- FIG. 6 is a cross-sectional view showing a state before setting the temperature sensitive indicator shown in FIG.
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Abstract
Description
そのため、こうした商品、製品の温度管理は生産時のみならず、流通時、保管時において厳格に温度管理を行なう必要があり、その温度管理を継続的に監視していく手段のひとつとして、感温インジケータが用いられている。
そして、この感温インジケータ50が付けられた製品等が所定温度以上に晒されると、多孔質パット52の染料が固相から液相に変化し、着色された化学物質が表示芯53と多孔質パット52の間の濃度勾配により、多孔質パット52から表示芯53に移動する。その結果、表示芯53の着色状態を視認することにより、当該製品等が一度でも所定温度以上の環境に晒されたか否かを判断することができる。
また、そのような感温インジケータにあっては、その作動後においても化学物質の溶液が気化し、履歴が消えてしまうという虞があった。
図において、感温インジケータ60は、基体61と、前記基体61上に載置された、油溶性色素、顔料又は染料を、直鎖炭化水素または直鎖炭化水素の組成からなる混合体に混合したもの(いわゆる着色ワックス)が内包されたカプセル62と、前記カプセル62を覆うように設けられたろ紙63とを備えている。
また、カプセルを破壊した際、指の温度を検出し、ろ紙が着色する場合があり、当該製品が所定温度以上の環境に晒されたと誤って判断される虞があった。
さらには、カプセルが破壊され、感温インジケータが作動した後においても、着色ワックスが気化してしまうという課題があった。
このように、本発明に係る感温インジケータにあっては、カプセルが可塑性材料からなる本体ベースの凹部内に封止されているため、押圧することにより凹部を容易に潰し、カプセルを逃がすことなく確実に破壊することができる。
このように可塑性材料からなる透明シート(例えばラミネートシール)により表示ラベルの上面を覆うことで、吸収部材に吸収された感温材を紫外線、色褪せ、乾燥、気化等から保護することができる。
また、外部から吸収部材に水分が浸入することを防ぐことができ、吸収部材内における低温時の結露を防止することができる。
このような吸収部材であれば、吸収部材の着色状態が前記貫通孔を通じて確認できるため、カプセルが置かれた位置からの着色部分の距離(貫通孔が複数並べられている場合は、着色した貫通孔の位置)により、所定温度以上あるいは所定温度以下の環境に晒された時間を容易に識別することができる。
また、所定温度未満で感温材が溶解し、カプセルが収容された凹部の上部が着色しても、表示ラベルの表示窓は前記凹部から離れているため、表示窓から吸収部材の着色が見えず、当該製品が所定温度以上の環境に晒されたと誤った認識がなされることを防止することができる。
このように、所定温度以下で液相となる化学物質を用いた感温インジケータは、レタス、じゃがいも、豆腐、炭酸飲料(ビール)等、凍結すると品質が劣化する商品、製品に好適に用いることができる。
また、前記感温材には、増粘剤を混合することが望ましく、その場合、周囲温度のばらつきに対する、液相となった感温材の前記吸収部材への浸透特性のばらつきを抑えることができる。
尚、カプセルに着色する場合、カプセル成形後に着色材を塗布してもよいし、或いは、カプセル成形時に材料に着色粉末を加えて着色してもよい。また、カプセルを2重構造とし、外側のカプセル(壁または膜)のみを着色するようにしてもよい。
また、カプセルが可塑性材料からなる本体ベースの凹部内に封止され、押圧部は前記凹部の直上部に位置するため、表示パネル及び吸収部材を介して前記凹部に強い押圧力が加えられる。このため、凹部を容易に潰し、カプセルを逃がすことなく確実に破壊することができる。
このように、カバーに押圧手段を形成することにより、指の熱を断熱しつつ、部品点数を削減でき、安価に製作することができる。
このように、カバーに形成された、或いは別体で設けられた突起部で感温インジケータを保持することにより、押圧手段で感温インジケータを押圧した際の感温インジケータの湾曲等による、カプセルが封止された凹部の位置ずれを防止することができる。
この透明シート8で表示ラベル7の上面を覆うことにより、吸収部材6及び吸収部材6に吸収された感温材を紫外線、色褪せ、乾燥、気化等から保護することができる。
また、外部から吸収部材6に水分が浸入することを防ぐことができ、吸収部材6内における低温時の結露を防止することができる。
また、この感温インジケータ3をカバー9で覆わず単体で用いる場合には、本体ベース4の下面に接着剤あるいは粘着材を形成するのが望ましい。その際、接着材、粘着材の上に剥離紙(図示せず)を設け、使用する際、この剥離紙を剥がして使用するように構成するのが好ましい。
図示するように細長形状に形成された吸収部材6は、その一端部が、前記カプセル5の上部に位置するように本体ベース4の径方向に沿って水平部4bの上部に載置される。そして、基体ベース4の水平部4bと表示ラベル7の下面とが貼り合わされることにより、吸収部材6がサンドイッチ状に狭持され、吸収部材6の脱落、位置ずれが防止されると共に、カプセル5が凹部4a内に封止される。
尚、本実施の形態においては、前記表示窓7aは複数設けられるものを好ましい例として示すが、本発明の感温インジケータにあっては、前記表示窓は、前記複数の表示窓7aに替えて、吸収部材6に沿って細長く形成された1つの貫通孔であってもよい。
また、表示ラベル7の上面には、表示窓7aから見える部分(前記吸収部材4)が着色(発色)している場合には、所定温度以上の環境下に置かれたことを示す注意書き等が記載されている。
尚、カプセル5に着色する場合、カプセル成形後に着色材を塗布してもよいし、或いは、カプセル成形時に材料に着色粉末を加えて着色してもよい。また、カプセルを2重構造とし、外側のカプセル(壁または膜)のみを着色するようにしてもよい。
また、感温材としては、水に溶解せず、所定温度にて溶融、変色する化学物質であっても良い。尚、以下の説明においては、着色ワックスを例に説明する。
また、吸収部材6は感温材を吸収できるものであればよく、従来から用いられている、ろ紙、多孔質体(フィルム、スポンジ等)、シリカゲル等を用いることができる。
前記凸部9aについて、より詳しく説明すると、凸部9aは、前記水平部9bから略垂直に立ち上がった立上部9cと、前記立上部9cの頂部に形成された断面円弧状の肩部9dと、前記肩部9dから中心部に向かって昇る、いわゆるドーム状の傾斜面部9eと、傾斜面部9eの中央に下方に突出して設けられた押圧部9f(押圧手段)とを備えている。
また、押圧部9fを陥没変形可能な傾斜面部9eに設けることにより、指で押圧部9fを押し込んだ際に、スナップ感を与えることができ、また、傾斜面部9eの反転力により確実にカプセル5を押圧して破壊することができる。
また、前記のようにカバー9に押圧部9fを形成することにより、部品点数を削減でき、安価に製作することができる。
さらには、カバー9の肩部9dには、感温インジケータ3の収容空間(カバー9内の空間)に向けて突出する1つまたは複数(図では3つ)の突起部9gが形成され、この突起部9gが感温インジケータ3の上面に係止し、感温インジケータ3がカバー9内に保持されている。
このように感温インジケータ3が突起部9gで保持されることにより、押圧部9fで感温インジケータ3を押圧した際の感温インジケータ3の湾曲等による、カプセル5が封止された凹部4aの位置ずれを防止することができる。
また、カバー9は透明な部材で形成されており、吸収部材6の着色(発色)状態を上方から表示窓7aを介し容易に視認することができるようになされている。
この押圧部9fの下方への移動に伴い、感温インジケータ3が基体2に対して押圧され、本体ベース4aが潰されてカプセル5が破壊され、セット状態になされる。
尚、カバー9を用いず、感温インジケータ3を直接、当該製品に使用(セット)する場合も含め、所定温度未満で着色ワックスがある程度溶解しても、表示ラベル7の表示窓7aはカプセル5が収容された凹部4aから離れているため、表示窓7aから着色は見えず、誤認識を防止することができる。
吸収部材6への着色ワックスの浸透が進行すると、その着色状態(発色状態)は、カバー9の上方から、透明なカバー9、透明シート8、表示ラベル7の表示窓7aを通して視認することができる(図4(b)の浸透部6a)。これにより、当該製品が一度でも所定温度以上の環境に晒されたか否かを判断することができる。
また、所定温度以上に晒された後、所定温度以下になることが複数回にわたる場合、その都度、着色ワックスは吸収部材6への浸透と停止を繰り返すため、所定時間に晒された積算時間を知ることもできる。
このように、所定温度以下で液相となる着色されたゲルを用い感温インジケータは、レタス、じゃがいも、豆腐、炭酸飲料(ビール)等、凍結すると品質が劣化する商品、製品に好適に用いることができる。
その場合、A感温インジケータ装置1を設置した環境温度が所定温度以上となった場合にカバー9が曇るため、感温インジケータ3による温度管理を含め2つの温度管理が可能である。
2 基体
3 感温インジケータ
4 本体ベース
4a 凹部
4b 水平部
5 カプセル
6 吸収部材
7 表示ラベル
7a 表示窓(貫通孔)
8 透明シート
9 カバー
9a 凸部
9b 水平部
9c 立上部
9d 肩部
9e 傾斜面部
9f 押圧部(押圧手段)
Claims (11)
- 感温材が内包されたカプセルを破壊することによって、温度が所定温度以上あるいは所定温度以下になったことを不可逆的に示す感温インジケータであって、
凹部が形成された可塑性材料からなる本体ベースと、
前記凹部内に収容された、感温材が内包されたカプセルと、
前記凹部の上部に載置された吸収部材と、
前記吸収部材を覆うと共に前記カプセルを前記凹部内に封止し、前記吸収部材の上面の一部が露出する貫通孔が形成された表示ラベルとを有し、
前記表示ラベルが押圧されることにより、前記本体ベースの凹部が潰され、前記カプセルが破壊されることを特徴とする感温インジケータ。 - 前記表示ラベルの上面を覆う可塑性材料からなる透明シートを有することを特徴とする請求項1に記載された感温インジケータ。
- 前記吸収部材の一端部が前記カプセルを収容した凹部の上部に載置されると共に、前記表示ラベルの前記貫通孔が、前記凹部の上部を除き、前記表示ラベルの外周方向に向かって形成されていることを特徴とする請求項1または請求項2に記載された感温インジケータ。
- 前記吸収部材は細長形状に形成され、前記吸収部材の一端部が前記カプセルを収容した凹部の上部に載置されると共に、前記表示ラベルの前記貫通孔が、前記凹部の上部を除き、前記吸収部材の長手方向に沿って形成されていることを特徴とする請求項3に記載された感温インジケータ。
- 前記表示ラベルの前記貫通孔は、所定の距離をおいて複数形成されていることを特徴とする請求項3または請求項4に記載された感温インジケータ。
- 前記感温材は、所定温度以上あるいは所定温度以下で液相となる化学物質であることを特徴とする請求項1乃至請求項5のいずれかに記載の感温インジケータ。
- 前記感温材には増粘剤が混合されていることを特徴とする請求項6に記載の感温インジケータ。
- 前記感温材または前記カプセルは所定の色に着色されていることを特徴とする請求項1乃至請求項7のいずれかに記載された感温インジケータ。
- 前記請求項1乃至請求項8に記載の感温インジケータと、前記感温インジケータを収容するケースとを備え、
前記ケースは、前記感温インジケータが載置される板状の基体と、前記基体上に載置された前記感温インジケータを覆うカバーと、前記カバーに形成された、或いは別体で設けられた前記感温インジケータを押圧する押圧手段とを有し、
前記押圧手段により前記感温インジケータが押圧されることにより、前記カプセルが破壊されることを特徴とする感温インジケータ装置。 - 前記押圧手段は、陥没可能な凸状のドーム型形状に形成された前記カバーの中央部に形成された、下方に突出した押圧部であり、
前記カバーを陥没させて、前記カプセルを前記押圧部により押圧することにより、前記カプセルを破壊することを特徴とする請求項9に記載の感温インジケータ装置。 - 前記感温インジケータを覆うカバーに形成された、或いは別体で設けられた前記カバー内空間に向けて突出する1つまたは複数の突起部を有し、
前記突起部が前記感温インジケータに係止し、前記感温インジケータが前記ケース内に保持されることを特徴とする請求項9または請求項10に記載の感温インジケータ装置。
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US20110168079A1 (en) | 2011-07-14 |
CN102016527A (zh) | 2011-04-13 |
JP2009264891A (ja) | 2009-11-12 |
CN102016527B (zh) | 2012-08-29 |
US8707887B2 (en) | 2014-04-29 |
JP5415712B2 (ja) | 2014-02-12 |
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