CN105911059B

CN105911059B - Acid-sensitive discoloration instruction device

Info

Publication number: CN105911059B
Application number: CN201610442423.8A
Authority: CN
Inventors: 刘永生; 郭欣; 刘文恒; 覃玲
Original assignee: Shenzhen Nine Stars Printing and Packaging Group Co Ltd
Current assignee: Shenzhen Nine Stars Printing and Packaging Group Co Ltd
Priority date: 2016-06-17
Filing date: 2016-06-17
Publication date: 2019-02-15
Anticipated expiration: 2036-06-17
Also published as: CN105911059A

Abstract

The present invention relates to a kind of acid-sensitive discoloration instruction devices.A kind of acid-sensitive discoloration instruction device, comprising: marker, marker include adsorbent and be adsorbed on the intracorporal indication composition of the absorption；Basal layer, for carrying the marker, the marker is laminated in the surface of the basal layer；Substrate layer covers the instruction layer surface, and the substrate layer is transparent material, and the substrate layer connect to form the host body that can obstruct gas with the edge seal of the basal layer, and the marker is contained in the enclosure space of the host body；Starter, it is connect with the edge of the substrate layer, the starter can drive the substrate layer to move to the direction far from the basal layer, be unfolded into the edge of the substrate layer and the basal layer and supply the volatile acid from the gap that the enclosure space is volatilized.Above-mentioned acid-sensitive discoloration instruction device facilitates adjustment color change cycle.

Description

Acid-sensitive discoloration instruction device

Technical field

The present invention relates to a kind of acid-sensitive discoloration instruction devices.

Background technique

General product has the perishable products such as service life or shelf-life, especially food, beverage and drug Storage when be easy to happen it is putrid and deteriorated, in order to reduce packaging in oxygen, avoid under oxygen atmosphere go bad, generally use vacuum Packaging or controlled atmospheric packing, and the date of production and shelf-life are printed in outer packing so that whether people are to expired judging.So And if product packaging is opened or begins to use, how effectively to record opening or is particularly important using the time.

Existing acid-sensitive discoloration instruction device includes basal layer, the marker for being formed in the substrate surface and protection Layer, marker include instruction unit and reference section, and instruction unit is covered in instruction unit surface to instruction by printing preparation, protective layer Portion is protected, and with the increase of product use time, the volatile acid in instruction unit can gradually volatilize with the extension of time, To which the color that pH indicator is shown can generate variation, making for product may determine that according to the color of instruction unit and reference section comparison With time or opening time.Protective layer is covered on the surface of marker, plays a protective role to marker, needs to have good Gas permeability so that volatile acid is volatilized by protective layer, while in order to avoid the influence that protective layer pair changes colour with instruction unit, being led to Material of the material for often pH value being selected to be in neutrality as protective layer.

However, protective layer is covered on the surface of marker, play a protective role, needs to have good ventilative to marker Property, so that volatile acid enters marker by protective layer and is reacted, while in order to avoid protective layer pair and instruction unit become Color adversely affects, material of the material for usually pH value being selected to be in neutrality as protective layer.However the gas transmission rate of protective layer The color change cycle of time-indicating arrangement can be had an impact, the gas transmission rate for adjusting protective layer is more difficult.

Summary of the invention

Based on this, it is necessary to provide a kind of acid-sensitive discoloration instruction device for facilitating adjustment color change cycle.

A kind of acid-sensitive discoloration instruction device, comprising:

Marker, marker include adsorbent and are adsorbed on the intracorporal indication composition of absorption, and the instruction is combined In terms of mass fraction, the volatile acid including 0.01 part~20 parts of pH indicators and 0.1 part~50 parts, the pH value refers to object Show agent be selected from m-cresol purple, thymolphthalein, o-cresolphthalein, bromthymol blue, cresol red, cetyltrimethyl ammonium sun from At least one of son, dimethyl diaminophenazine chloride, phenol red, rhodamine, Sulforhodamine 101 and thymol blue, the volatile acid are volatilization Property carboxylic acid；

Basal layer, for carrying the marker, the marker is laminated in the surface of the basal layer；

Substrate layer, covers the instruction layer surface, and the substrate layer is transparent material, the substrate layer and the basal layer Edge seal connect the host body to be formed and can obstruct gas, the marker is contained in the enclosure space of the host body；

Starter is connect with the edge of the substrate layer, and the starter can drive the substrate layer to far from institute The direction movement for stating basal layer, is unfolded into the edge of the substrate layer and the basal layer for the volatile acid described in The gap of enclosure space volatilization.

The indication composition further includes 10 parts~100 parts of solvent in one of the embodiments, and the solvent is selected from At least one of ethyl alcohol, methanol, isopropanol, acetone and water.

The fringe region of the fringe region of the substrate layer and the basal layer is bonded in one in one of the embodiments, It rises and forms bonding part.

The acid-sensitive discoloration instruction device further includes for reducing bonding part partial region in one of the embodiments, The dielectric layer of cohesive force, the dielectric layer be set to the bonding part, the dielectric layer cover the substrate layer fringe region or The part of the surface product of the fringe region of the basal layer, and the edge from the bonding part far from the marker is to the bonding Portion extends close to the edge of the marker, and the starter and the substrate layer connect corresponding to the edge of the position of dielectric layer It connects.

In one of the embodiments, the material of the dielectric layer be selected from selected from common ink, UV gloss oil, organic silicone oil and At least one of anodized aluminium.

The starter is in one of the embodiments, for convenience of the handgrip held, the starter and the base Material layer is integrally formed, and is extended outwardly from the edge that the substrate layer is equipped with the region of the dielectric layer.

The junction of the starter and the substrate layer is formed with impression in one of the embodiments,.

It in one of the embodiments, further include the comparison layer for being formed in the substrate layer surface, the comparison layer includes Observation window and comparison portion, the observation window correspond to the marker, and the comparison portion provides reference color or other information.

It in one of the embodiments, further include being laminated in the surface for comparing layer to be used to protect the guarantor for comparing layer Sheath.

The indication composition further includes 0.05 part~30 parts of alkali in one of the embodiments, and the alkali is selected from hydrogen At least one of sodium oxide molybdena, magnesium hydroxide, potassium hydroxide and lithium hydroxide.

Above-mentioned acid-sensitive discoloration instruction device, by adjusting the adjustment color change cycle that can be convenient of size in gap；Instruction Layer in adsorbent by adsorbing indication composition, and it is not necessary that adhesive etc. is added, indicating effect is more accurate；In use, Starter is gently pullled, gives substrate layer one upward active force, since the presence of dielectric layer reduces dielectric layer place portion The cohesive force of the bonding part of position is opened easily in the position of setting dielectric layer, a breathable gap occurs, so that Volatile acid is volatilized by gap from the inside of host body, and acid-sensitive discoloration instruction device is activated, and volatile acid is from host body Inside volatilization, the pH value in marker changes, and with the change of pH value color gradient occurs for pH indicator, works as finger When showing that the shelf-life after the color change cycle of layer opens packaging with product is consistent, people can be aobvious by comparing reference color and observation window The color shown intuitively is concluded that when the color that observation window is shown is close to starting color, shows that product is very fresh, can It is safe to use, when the color that observation window is shown and close intermediate color, shows that product has placed a period of time, do not go bad, answer It uses as early as possible, when the color and terminal colour that observation window is shown are close, show that product has gone bad, should not continue to use.It is acid-sensitive The marker of discoloration instruction device is felt by absorption preparation, and technique is relatively easy.

Detailed description of the invention

Fig. 1 is the structural schematic diagram of the acid-sensitive discoloration instruction device of an embodiment；

Fig. 2 is the partial structure diagram for comparing layer and starter of the acid-sensitive discoloration instruction device in Fig. 1；

Fig. 3 is the structural schematic diagram of the acid-sensitive discoloration instruction device of another embodiment；

Fig. 4 is the partial structure diagram for comparing layer and starter of the acid-sensitive discoloration instruction device in Fig. 3；

Fig. 5 is the structural schematic diagram of the acid-sensitive discoloration instruction device of another embodiment；

Fig. 6 is the structural schematic diagram of the acid-sensitive discoloration instruction device of another embodiment.

Specific embodiment

It is described in further detail below mainly in combination with specific embodiments and drawings acid labile discoloration instruction device.

Referring to Fig. 1, the acid-sensitive discoloration instruction device 100 of an embodiment includes basal layer 110, substrate layer 120, refers to Show layer 130, dielectric layer 150, compare layer 160, protective layer 170, adhesive layer 180, peeling layer 185 and starter 190.

Basal layer 110 is for carrying marker 130.Basal layer 110 has good air-tightness, gas can be prevented to penetrate Basal layer 110.The material of basal layer 110 be polyethylene (PE), polypropylene (PP), polyethylene terephthalate (PET) or Surface recombination has the composite material of above-mentioned material.Composite material can be common PET/aluminium foil/heat-sealing PET composite material ("/" Represent stacking, similarly hereinafter), common PP/ aluminium foil/heat-sealing CPP composite material, LDPE/ aluminium foil/PP composite material, HDPE/ aluminium foil/PET Composite material.Wherein CPP represents un-stretched polypropylene.Pass through printing or compound opaque material in one of the embodiments, The methods of, non-transparent material is set by basal layer 110.Certainly, it should be noted that the material of basal layer 110 is not limited to Material is stated, other materials with good hot-melt bonding performance and air-tightness all can serve as the material of basal layer 110.

Substrate layer 120 is used to cooperatively form the host body 140 for accommodating marker 130 with basal layer 110.Substrate layer 120 have good transparency, so as to observe the face for the marker 130 being housed in host body 140 by substrate layer 120 Color.Substrate layer 120 plays printing and compares 160 carrying of layer, air barrier effect and the effect with 110 hot melt adhesive of basal layer, With good transparency, the material of substrate layer 120 is polyethylene (PE), polypropylene (PP), polyethylene terephthalate (PET) or surface recombination has the composite transparent material of above-mentioned material.Composite transparent material can answer for common PET/heat-sealing PET Condensation material, common PP/ seal CPP composite material, LDPE/PP composite material, HDPE/PET composite material.Certainly, it needs to illustrate , the material of substrate layer 120 is not limited to above-mentioned material, other materials with the good transparency, hot sticky performance and air-tightness Material all can serve as the material of substrate layer 120.

Basal layer 110 and substrate layer 120 are stacked together, marker 130 between basal layer 110 and substrate layer 120, And cover the middle part of basal layer 110.The fringe region of basal layer 110 and the fringe region of substrate layer 120 are sealed to be formed Bonding part 125, to form one with good air-tightness, the closed accommodating space that gas can be prevented to pass through.It is illustrating Embodiment in, bonding part 125 be annular, have certain width.Substrate layer 120 and base in one of the embodiments, The contact surface material of bottom 110 is identical, so that identical high molecular material at high temperature can be by intermolecular when hot melt adhesive Gluing-free is realized in fusion.Certainly, in other examples, the marginal zone of the fringe region of basal layer 110 and substrate layer 120 Domain can be adhesively-bonded together to form bonding part 125 by glue.

Dielectric layer 150 is between basal layer 110 and substrate layer 120, and dielectric layer 150 is set to bonding part 125, and covers The partial region at 110 edge of basal layer, for reducing the cohesive force of 125 partial region of bonding part.In the illustrated embodiment, Dielectric layer 150 covers the part of the surface product of the fringe region of substrate layer 120 or the fringe region of basal layer 110.Dielectric layer 150 is Sheet, width of the dielectric layer 150 in the bonding part 125 at the position where the size of the width direction of bonding part 125 and dielectric layer 150 Spend identical, 150 autoadhesion portion 125 of dielectric layer extends to bonding part 125 far from marker 130 close to the side of marker 130 Side.The material of dielectric layer 150 is selected from least one of common ink, UV gloss oil, organic silicone oil and anodized aluminium.In bonding part 125 setting dielectric layers 150 facilitate so as to reduce cohesive force at the position of setting dielectric layer 150 by the substrate of this position Layer 110 separates the gap to be formed and be volatilized away for volatile acid with substrate layer 120.The width in gap is 1mm~50mm.

Marker 130 is contained in the accommodating space of host body 140.Marker 130 is including adsorbent and is adsorbed on absorption The indication composition of body.Carrier of the adsorbent as carrying indication composition, has micropore property to adsorb indication composition. The pH value of adsorbent itself is in neutrality in one of the embodiments, so as to avoid impacting indication composition.It inhales The material of attached body is microporous teflon membran, glass fibre porous film, microporous polypropylene membrane, pure pulp fibres, nylon fiber Or cloth, certainly, it should be noted that any pH value is in neutrality, and the material that can absorb liquid through capillary action can be made For the material of adsorbent.Adsorbent with a thickness of 1 μm~2000 μm, the average pore size of adsorbent micropore is 1nm~5000nm.

Specifically in the illustrated embodiment, indication composition is acid-sensitive indication composition.Indicating liquid includes pH value Indicator and solvent.Indication composition includes pH indicator and volatile acid.Indication composition is by adsorbing indicating liquid Volatile acid is sprayed in adsorbent, after solvent seasoning to obtain.Indicating liquid is in terms of mass fraction, including 0.01 part~20 parts PH indicator, 10 parts~100 parts of solvent.0.1 part is sprayed after being adsorbed on the indicating liquid solvent evaporation drying in adsorbent ~50 parts of volatile acid obtain indicant combination, indication composition include 0.01 part~20 parts pH indicator and 0.1 part ~50 parts of volatile acid.Certainly, in other embodiments, indication composition include 0.01 part~20 parts pH indicator, 10 parts~100 parts of solvent and 0.1 part~50 parts of volatile acid, are directly adsorbed on adsorbent for indication composition.

Indication composition further includes 0.05 part~30 parts of alkali in one of the embodiments,.Alkali is selected from sodium hydroxide, hydrogen At least one of magnesia, potassium hydroxide and lithium hydroxide.When preparation, by alkali with a small amount of water dissolve mixed with other components or Directly in a solvent by alkali soluble solution.

PH indicator changes sensitivity to pH value, and color change occurs as pH value changes.First between pH indicator is selected from Phenol violet (MCP), thymolphthalein, o-cresolphthalein, bromthymol blue (BTB), cresol red, cetyltrimethyl ammonium cation (CTA), at least one of dimethyl diaminophenazine chloride (NR), phenol red (PR), rhodamine (R6G), Sulforhodamine 101 and thymol blue.It answers Work as understanding, the material of other pairs of pH sensitives all can be used as pH indicator.

Volatile acid has volatility, for changing the pH value of indication composition.Volatile acid is carboxylic acid.Carboxylic acid is selected from second At least one of acid, propionic acid, butyric acid and other higher carbon chain carboxylic acids.It is appreciated that other have volatile acid Matter also can be used as volatile acid.

Solvent is for dissolving pH indicator.Solvent is selected from least one of ethyl alcohol, methanol, isopropanol, acetone and water. It is appreciated that the fluent material that other dissolvable pH indicators and pH value are in neutrality all can be used as solvent.

Alkali is used to expand the pH value variation range of instruction component, and after alkali is added in indicating liquid, initial pH value is in alkalinity, Spray excessive volatile acid after being adsorbed by drying, volatile acid is reacted with highly basic generates strong base-weak acid salt, due to volatile acid with Alkali is compared to excessively, and pH value is in acidity, with the volatilization of volatile acid, indicates that component pH value gradually rises, when volatile acid is complete After full volatilization, instruction component is because strong base weak acid salt hydrolysis is in alkalinity, i.e., after addition alkali, indicates that the pH value variation range of component can be from Acidity becomes alkalinity (the instruction component pH value variation range that alkali is not added is to become neutral from acidity), makes the color for indicating component Variation becomes apparent from.Alkali is at least one of soluble highly basic such as sodium hydroxide, potassium hydroxide, magnesium hydroxide, lithium hydroxide.When So, it is added without alkali, can also be served the same role using alkaline adsorption body.

Indication composition is carbon dioxide sensitivity indication composition in one of the embodiments, at this time acid-sensitive discoloration Instruction device is carbon dioxide sensitivity discoloration instruction device.Indication composition is done by the way that indicating liquid to be adsorbed in adsorbent It is obtained after dry.Indicating liquid includes pH indicator, carbon dioxide adsorbent and solvent.Indication composition includes pH value instruction Agent and carbon dioxide adsorbent.Indicating liquid is in terms of mass fraction in one of the embodiments, including 0.01 part~20 parts PH indicator, 0.1 part~80 parts of carbon dioxide adsorbent and 10 parts~100 parts of solvent.It is adsorbed in adsorbent Indicating liquid solvent evaporation drying after obtain indicant combination, indication composition includes 0.01 part~20 parts of pH indicator And 0.1 part~80 parts of carbon dioxide adsorbent.Certainly, in other examples, indication composition and indicating liquid Form it is identical, including 0.01 part~20 parts of pH indicators, 0.1 part~80 parts of carbon dioxide adsorbent and 10 parts ~100 parts of solvent, indicating liquid is adsorbed in adsorbent, is not necessarily to drying.

PH indicator changes sensitivity to pH value, occurs as indication composition pH value changes, the color of pH indicator Also it changes.PH indicator is selected from m-cresol purple (MCP), thymolphthalein, o-cresolphthalein, bromthymol blue (BTB), first Phenol red, cetyltrimethyl ammonium cationic (CTA), dimethyl diaminophenazine chloride (NR), phenol red (PR), rhodamine (R6G), Sulforhodamine At least one of 101 and thymol blue.It is appreciated that other also can be used as pH indicator to the material of pH sensitive.

Carbon dioxide adsorbent can absorb the sour gas carbon dioxide in air, and then changes the pH of indication composition Value.Carbon dioxide adsorbent is in quaternary ammonium salt, sodium hydroxide, lithium hydroxide, barium hydroxide, potassium hydroxide and sodium bicarbonate At least one.Quaternary ammonium salt is selected from tetrabutylammonium hydroxide, tetraethyl ammonium hydroxide, tetramethyl in one of the embodiments, At least one of ammonium hydroxide and tetrapropylammonium hydroxide.

Solvent can dissolve PH indicator and carbon dioxide adsorbent.Solvent be selected from ethyl alcohol, methanol, isopropanol, acetone and At least one of water.It is appreciated that other dissolvable pH indicators and carbon dioxide adsorbent and pH value were in neutrality Fluent material all can be used as solvent.

Indication composition is oxygen sensitive indication composition in one of the embodiments, and acid-sensitive discoloration indicates at this time Device is oxygen sensitive discoloration instruction device.Indication composition is obtained after dry by the way that indicating liquid to be adsorbed in adsorbent. Indicating liquid includes oxygen sensitive dyestuff, reducing agent and solvent.Indication composition includes oxygen sensitive dyestuff and reducing agent.Instruction Liquid in terms of mass fraction, including 0.01 part~20 parts of oxygen sensitive dyestuffs, 0.01 part~50 parts of reducing agent and 10 parts~ 100 parts of solvent.Indicant combination, indication composition packet are obtained after the indicating liquid solvent evaporation drying being adsorbed in adsorbent Include 0.01 part~20 parts of oxygen sensitive dyestuff and 0.01 part~50 parts of reducing agent.Certainly, in other examples, indicate Composition is identical with the composition of indicating liquid, including 0.01 part~20 parts of oxygen sensitive dyestuffs, 0.01 part~50 parts Reducing agent and 10 parts~100 parts of solvent, indicating liquid is adsorbed in adsorbent, is not necessarily to drying.

Oxygen sensitive dyestuff has two kinds of forms of oxidized and reduced, respectively corresponds two different colors, oxidation state Oxygen sensitive dyestuff can be reduced agent reduction, reduction-state is in after reduction, the oxygen sensitive dyestuff of reduction-state can send out with oxygen Color change occurs for raw redox reaction, reaction process.Oxygen sensitive dye selection thiazine dye, oxazine dye, azine dye At least one of material, indophenol dye and bipseudoindoxyl dye.Most common oxygen sensitive active dyestuff is methylene blue.Thiazine dye choosing From at least one of methylene blue, thionine and toluidine blue.Oxazine dye is in resazurin, Safranine O and celestine blue At least one.Azine dye is selected from least one of m-cresol purple and reddish black A.Indophenol dye is dichloroindophenol.Indigo dye Material is selected from least one of indigo and indigo-blue famille rose.It should be appreciated that other oxidation-reduction indicators also can be used as the present invention Oxygen sensitive dyestuff.

Reducing agent can reduction-oxidation state oxygen sensitive dyestuff, make it have with oxygen occur redox reaction energy Power.Reducing agent is selected from dithionite, the oxidation product of dithionite, sulphite, boron hydrogen sodium sulfite, hydroboration At least one of sodium, glucose.Dithionite can be sodium dithionite.The oxidation product of dithionite selects At least one of sodium thiosulfate and bisulfites freely.Bisulfites be selected from sodium hydrogensulfite, potassium bisulfite and At least one of magnesium bisulfite.Sulphite is selected from least one of calcium sulfite, potassium sulfite and magnesium sulfite.It answers Work as understanding, it is other can reduction-oxidation state oxygen sensitive dyestuff substance, also can be used as reducing agent of the invention.

Solvent is used for dissolved oxygen sensitive dye and reducing agent.Solvent is in ethyl alcohol, methanol, isopropanol, acetone and water At least one.It is appreciated that the fluent material that other dissolvable oxygen sensitive dyestuffs and reducing agent and pH value are in neutrality all may be used As solvent.

Indication composition is alkali sensitivity indication composition in one of the embodiments, the dress of acid-sensitive discoloration instruction at this time It is set to alkali sensitivity discoloration instruction device.Indicating liquid includes pH indicator and solvent.Indication composition includes pH indicator And volatile base.Indication composition sprays volatile base by the way that indicating liquid to be adsorbed in adsorbent, after solvent seasoning and obtains. Indicating liquid is in terms of mass fraction, the solvent including 0.01 part~20 parts of pH indicators and 10 parts~100 parts.It is adsorbed on 0.1 part~50 parts of volatile base is sprayed after indicating liquid solvent evaporation drying in attached body obtains indicant combination, key group Closing object includes 0.01 part~20 parts of pH indicator and 0.1 part~50 parts of volatile base.Certainly, in other embodiments, Indication composition includes 0.01 part~20 parts of pH indicator, 10 parts~100 parts of solvent and 0.1 part~50 parts of volatility Indication composition is directly adsorbed on adsorbent by alkali.

Indication composition further includes 0.05 part~30 parts of acid in one of the embodiments,.Acid is selected from HCl, H₂SO₄And HNO₃At least one of.When preparation, acid is added in the form of hydrochloric acid, the concentrated sulfuric acid or concentrated nitric acid, what number said before referred to It is hydrochloric acid, effective component (HCl, H in the concentrated sulfuric acid or concentrated nitric acid₂SO₄Or HNO₃) number, do not include the water wherein contained.

PH indicator changes sensitivity to pH value, and color change occurs as pH value changes.First between pH indicator is selected from Phenol violet (MCP), thymolphthalein, o-cresolphthalein, bromthymol blue (BTB), cresol red, cetyltrimethyl ammonium cation (CTA), at least one of dimethyl diaminophenazine chloride (NR), phenol red (PR), rhodamine (R6G), Sulforhodamine 101 and thymol blue.It can To understand, the material of other pairs of pH sensitives all can be used as pH indicator of the invention.

Volatile base has volatility, for changing the pH value of indication composition.Volatile base is selected from ammonium hydroxide, hydroxide At least one of ammonium, propylamine, n-butylamine, n-hexylamine and n-octyl amine.It should be appreciated that other have volatile alkaline matter It can be used as volatile base.

It is sour that for expanding the pH value variation range of instruction component, after acid is added in indicating liquid, initial pH value is in acidity, Excessive volatile base is sprayed after absorption indicating liquid is dry, volatile base is reacted with strong acid generates strong acid weak base salt, due to waving Hair property alkali is with acid compared to excessive, and pH value is in alkalinity, and with the volatilization of volatile base, instruction component pH value is gradually decreased, when waving After hair property alkali volatilizees completely, instruction component is because strong acid weak base salt hydrolysis is in acidity, that is, after acid being added, indicates the pH value variation of component Range can become acid (the instruction component pH value variation range that acid is not added is to become neutral from alkalinity) from alkalinity, make key group The color change of part becomes apparent from.Certainly, it is added without acid, can also be served the same role using acid adsorbent.

Please refer to Fig. 1 and Fig. 2, the surface that layer 160 is formed in substrate layer 120 is compared.Comparing layer 160 includes observation window 162 and comparison portion 164.Observation window 162 is located at the middle part of comparison layer 160 in order to observe the color of marker 130, in diagram In embodiment, 162 face marker 130 of observation window.In the illustrated embodiment, it compares 160 middle part hollow out of layer and forms sight Window 162 is examined, certainly, in other embodiments, observation window 162 can be transparent material, be not necessarily to hollow out.Comparison portion 164 mentions Color or other information for reference, the comparison mark as marker 130, comparison portion 164 can be by printing on 120 surface of substrate layer Scopiform at.Reference color can be the terminal colour of indication composition discoloration, and certainly, reference color also may include indication composition Starting color, in the illustrated embodiment, comparison portion 164 includes three kinds of reference colors, provides indication composition respectively Starting color, intermediate color and terminal colour.When the color that marker 130 is shown is starting color, acid-sensitive discoloration is indicated The product that instruction device 100 indicates is more fresh, when the color that marker 130 is shown is intermediate color, indicates that product will use up It is fast to use, when the color that marker 130 is shown is terminal colour, indicate that product has gone bad.Certainly, as needed, with reference to face Color can be set to graduated colors.

Protective layer 170 is laminated in the surface for comparing layer 160 to protect comparison layer 160.Protective layer 170 can for protection oil reservoir or Protective film layer.The material of protective layer 170 in water-based gloss oil, aqueous mute oil, UV gloss oil PET film and PP film at least one Kind.

Adhesive layer 180 is formed in a side surface of the basal layer 110 far from marker 130.Adhesive layer 180 is for referring to discoloration Showing device 100 is adhered to the surface of other articles, and the material of adhesive layer 180 is in acrylic resin, pressure sensitive adhesive and polyurethane At least one.

Peeling layer 185 is adhered to the surface of adhesive layer 180.Preferably, peeling layer 185 for glassine paper or is coated with silicone oil Paper, so as to the sur-face peeling by peeling layer 185 from adhesive layer 180.

Starter 190 is used to open the enclosure space of the formation of host body 140, makes volatile acid from inside host body 140 Volatilization is gone out.In the illustrated embodiment, starter 190 is the handgrip for facilitating gripping.Starter 190 and substrate Layer 120 corresponds to the edge connection of the position of dielectric layer 150.To give substrate layer 120 1 by pullling starter 190 Upward active force, since the presence of dielectric layer 150 reduces the cohesive force of the bonding part 125 at 150 place position of dielectric layer, The position that dielectric layer 150 is arranged is opened easily, and a breathable gap occurs, so that volatile acid passes through gap certainly The inside of host body 140 is volatilized away, and acid-sensitive discoloration instruction device 100 is activated.

In the illustrated embodiment, starter 190 is rectangular patch, is three-decker, first layer and substrate layer 120 It is integrally formed, second is integrally formed with layer 160 is compared, and third layer and protective layer 170 are integrally formed, and starter 190 is from base The edge of material layer 120 extends outwardly.

In the illustrated embodiment, starter 190 and substrate layer 120, the connection for comparing layer 160 and protective layer 170 Place is formed with impression 192, so that starter 190 tilts slightly to the direction far from basal layer 110, is held with facilitating.

Above-mentioned acid-sensitive discoloration instruction device 100, by adjusting the adjustment color change cycle that can be convenient of size in gap；Refer to Show layer by adsorbing indication composition in adsorbent, it is not necessary that adhesive etc. is added, indicating effect is more accurate；It uses When, starter 190 is gently pullled, gives substrate layer 120 1 upward active forces, since the presence of dielectric layer 150 reduces The cohesive force of the bonding part 125 at 150 place position of dielectric layer is opened easily in the position of setting dielectric layer 150, occurs one Breathable gap, so that volatile acid is volatilized by gap from the inside of host body 140, acid-sensitive discoloration instruction device 100 are activated, and volatile acid volatilizees from the inside of host body 140, and the pH value in marker changes, pH indicator with The change of pH value color gradient occurs, when the color change cycle of marker 130 and product open the shelf-life after packing it is consistent when, People can intuitively be concluded that the color when observation window is shown by the color that comparison reference color and observation window are shown When close to starting color, show that product is very fresh, can be safe to use, when the color that observation window is shown and close intermediate color, Show that product has placed a period of time, does not go bad, should use as early as possible, when the color and terminal colour that observation window is shown are close, Show that product has gone bad, should not continue to use.For the marker of acid-sensitive discoloration instruction device by absorption preparation, technique is relatively simple It is single.

It should be further noted that passing through the discoloration for the adjustable marker 130 of concentration for adjusting indicating liquid ingredient Period by adjusting the thickness of marker 130 and the aperture of adsorbent micropore, is adsorbed on adsorbent certainly so as to control The total amount of interior indication composition.By adjusting the cross-sectional width in gap, adjustable acid-sensitive discoloration instruction device 100 starts When the size in gap that is formed, to control the evaporation rate of volatile acid, and then control color change cycle.

Referring to Fig. 3, the acid-sensitive discoloration instruction device 200 of an embodiment includes basal layer 210, substrate layer 220, refers to Show layer 230, compare layer 260, protective layer 270, adhesive layer 280, peeling layer 285 and starter 290.

Basal layer 210 is for carrying marker 230.Basal layer 210 has good air-tightness, gas can be prevented to penetrate Basal layer 210.The material of basal layer 210 be polyethylene (PE), polypropylene (PP), polyethylene terephthalate (PET) or Surface recombination has the composite material of above-mentioned material.Composite material can be common PET/aluminium foil/heat-sealing PET composite material, general Logical PP/ aluminium foil/heat-sealing CPP composite material, LDPE/ aluminium foil/PP composite material, HDPE/ aluminium foil/PET composite material.Wherein one In a embodiment, by the methods of printing or compound opaque material, non-transparent material is set by basal layer 210.Certainly, it needs It is noted that the material of basal layer 210 is not limited to above-mentioned material, other materials with good hot sticky performance and air-tightness It all can serve as the material of basal layer 210.

Substrate layer 220 is used to cooperatively form the host body 240 for accommodating marker 230 with basal layer 210.Substrate layer 220 have good transparency, so as to observe the face for the marker 230 being housed in host body 240 by substrate layer 220 Color.The material of substrate layer 220 is polyethylene (PE), polypropylene (PP), polyethylene terephthalate (PET) or surface recombination There is the composite transparent material of above-mentioned material.Composite transparent material can be common PET/heat-sealing PET composite material, common PP/ Seal CPP composite material, LDPE/PP composite material, HDPE/PET composite material.Certainly, it should be noted that substrate layer 220 Material be not limited to above-mentioned material, other materials with the good transparency, hot sticky performance and air-tightness all can serve as base The material of material layer 220.

Basal layer 210 and substrate layer 220 are stacked together, marker 230 between basal layer 210 and substrate layer 220, And cover the middle part of basal layer 210.The fringe region of basal layer 210 and the fringe region of substrate layer 220 are sealed to be formed Bonding part 225, to form one with good air-tightness, the closed accommodating space that gas can be prevented to pass through.Wherein In one embodiment, substrate layer 220 is identical as the contact surface material of basal layer 210, so that identical material exists when hot melt adhesive Under high temperature gluing-free can be realized by intermolecular fusion.Certainly, in other examples, the marginal zone of basal layer 210 The fringe region of domain and substrate layer 220 can be adhesively-bonded together to form bonding part 225 by glue.

Marker 230 is contained in the accommodating space of host body 240.Marker 230 is including adsorbent and is adsorbed on absorption The indication composition of body.Carrier of the adsorbent as carrying indication composition, has micropore property to adsorb indication composition. The pH value of adsorbent itself is in neutrality, so as to avoid adversely affecting indication composition.The material of adsorbent is poly- Tetrafluoroethene microporous barrier, glass fibre porous film, microporous polypropylene membrane, pure pulp fibres, nylon fiber or cloth need certainly Illustrate, any pH value is in neutrality, and the material that can absorb liquid through capillary action all can serve as the material of adsorbent.

PH indicator changes sensitivity to pH value, and color change occurs as pH value changes.First between pH indicator is selected from Phenol violet (MCP), thymolphthalein, o-cresolphthalein, bromthymol blue (BTB), cresol red, cetyltrimethyl ammonium cation (CTA), at least one of dimethyl diaminophenazine chloride (NR), phenol red (PR), rhodamine (R6G) Sulforhodamine 101 and thymol blue.It can be with Understand, the material of other pairs of pH sensitives all can be used as pH indicator of the invention.

Please refer to Fig. 3 and Fig. 4, the surface that layer 260 is formed in substrate layer 220 is compared.Comparing layer 260 includes observation window 262 and comparison portion 264.Observation window 262 is located at the middle part of comparison layer 260 in order to observe the color of marker 230, in diagram In embodiment, 262 face marker 230 of observation window.In the illustrated embodiment, it compares 260 middle part hollow out of layer and forms sight Window 262 is examined, certainly, in other embodiments, observation window 262 can be transparent material, be not necessarily to hollow out.Comparison portion 264 mentions Color or other information for reference, the comparison mark as marker 230, comparison portion 264 can be by printing on 220 surface of substrate layer Scopiform at.Reference color can be the terminal colour of indication composition discoloration, and certainly, reference color also may include indication composition Starting color, in the illustrated embodiment, comparison portion 264 includes three kinds of reference colors, provides indication composition respectively Starting color, intermediate color and terminal colour.When the color that marker 230 is shown is starting color, acid-sensitive discoloration is indicated The product that instruction device 200 indicates is more fresh, when the color that marker 230 is shown is intermediate color, indicates that product will use up It is fast to use, when the color that marker 230 is shown is terminal colour, indicate that product has gone bad.Certainly, as needed, with reference to face Color can be set to graduated colors.

Protective layer 270 is laminated in the surface for comparing layer 260 to protect comparison layer 260.Protective layer 270 can for protection oil reservoir or Protective film layer.The material of protective layer 270 in water-based gloss oil, aqueous mute oil, UV gloss oil PP film and PET film at least one Kind.

Adhesive layer 280 is formed in a side surface of the basal layer 210 far from marker 230.Adhesive layer 280 is for referring to discoloration Showing device 200 is adhered to the material of the surface adhesive layer 280 of other articles in acrylic resin, pressure sensitive adhesive and polyurethane It is at least one.

Peeling layer 285 is adhered to the surface of adhesive layer 280.Preferably, peeling layer 285 for glassine paper or is coated with silicone oil Paper, so as to the sur-face peeling by peeling layer 285 from adhesive layer 280.

Starter 290 is used to open the enclosure space of the formation of host body 240, makes volatile acid from inside host body 240 Volatilization is gone out.

In the illustrated embodiment, starter 290 includes venthole 292 and the sealing for closing venthole 292 Part 294.Venthole 292 is opened in host body 240, for the opening of host body 240 to be made volatile acid volatilization escape, specifically, Venthole 292 through protective layer 270, compare layer 260 and substrate layer 220, so as to so that volatile acid host body 240 inside Volatilization escape, acid-sensitive discoloration instruction device 200 are activated.292 aperture of venthole is 1mm~15mm.

Sealing element 294 is barrier film, the material of sealing element 294 be selected from PET film, PP film, PVC film, aluminizer and comprising At least one of composite material of above-mentioned material.Sealing element 294 affixes to protective layer 270 and closes by bonding glue-line 296 Venthole 292.In the illustrated embodiment, 294 one end of sealing element extends to form the handgrip for facilitating gripping.In use, catching Handgrip removes sealing element 294, so that volatile acid is volatilized away from the inside of host body 240 to open venthole 292.Bonding The material of glue-line 296 is selected from least one of UV glue, pressure sensitive adhesive and acrylic resin.

Above-mentioned acid-sensitive discoloration instruction device 200 passes through the adjustment color change cycle for adjusting the size of venthole can be convenient；Make Used time gently pulls starter 290, and sealing element 294 is removed, and opens venthole 292 to which volatile acid passes through venthole It volatilizees away from the inside of host body 240, acid-sensitive discoloration instruction device 200 is activated, and volatile acid is from host body 240 Portion volatilizees away, and the pH value of marker changes, and with the change of pH value color gradient occurs for pH indicator, works as marker When 230 color change cycle is consistent with the shelf-life after product opening packaging, people can be aobvious by comparing reference color and observation window The color shown intuitively is concluded that when the color that observation window is shown is close to starting color, shows that product is very fresh, can It is safe to use, when the color that observation window is shown and close intermediate color, shows that product has placed a period of time, do not go bad, answer It uses as early as possible, when the color and terminal colour that observation window is shown are close, show that product has gone bad, should not continue to use.It is acid-sensitive The marker of discoloration instruction device is felt by absorption preparation, and technique is relatively easy.

It should be further noted that passing through the discoloration for the adjustable marker 230 of concentration for adjusting indicating liquid ingredient Period by adjusting the thickness of marker 230 and the aperture of adsorbent micropore, is adsorbed on adsorbent certainly so as to control The total amount of interior indication composition.By adjusting the aperture of venthole 292, so that the rate of volatile acid volatilization is controlled, thus Control color change cycle.

Referring to Fig. 5, the structure of the acid-sensitive discoloration instruction device 300 of an embodiment and acid-sensitive discoloration instruction device 100 structure is roughly the same, and acid-sensitive discoloration instruction device 300 includes basal layer 310, substrate layer 320, marker 330, medium Layer 350, protective layer 370, adhesive layer 380, peeling layer 385 and starter 390, difference is, acid-sensitive discoloration instruction dress Setting 300 does not include comparing layer, and other structures are identical as the structure of sensitive discoloration instruction device 100.

Specifically, basal layer 310 is for carrying marker 330.Basal layer 310 has good air-tightness, can prevent Gas penetrates basal layer 310.The material of basal layer 310 is polyethylene (PE), polypropylene (PP), polyethylene terephthalate (PET) or surface recombination has the composite material of above-mentioned material.Composite material can be compound for common PET/aluminium foil/heat-sealing PET Material ("/" represents stacking, similarly hereinafter), common PP/ aluminium foil/heat-sealing CPP composite material, LDPE/ aluminium foil/PP composite material, HDPE/ Aluminium foil/PET composite material.Wherein CPP represents un-stretched polypropylene.In one of the embodiments, by printing or it is compound not Basal layer 310 is set non-transparent material by the methods of transparent material.Certainly, it should be noted that the material of basal layer 310 It is not limited to above-mentioned material, other materials with good hot-melt bonding performance and air-tightness all can serve as basal layer 310 Material.

Substrate layer 320 is used to cooperatively form the host body 340 for accommodating marker 330 with basal layer 310.Substrate layer 320 have good transparency, so as to observe the face for the marker 330 being housed in host body 340 by substrate layer 320 Color.Substrate layer 320 plays air barrier and the effect with 310 hot melt adhesive of basal layer, has good transparency, substrate layer 320 material is that polyethylene (PE), polypropylene (PP), polyethylene terephthalate (PET) or surface recombination have above-mentioned material The composite transparent material of material.Composite transparent material can seal CPP and answer for common PET/heat-sealing PET composite material, common PP/ Condensation material, LDPE/PP composite material, HDPE/PET composite material.Certainly, it should be noted that the material of substrate layer 320 is unlimited In above-mentioned material, other materials with the good transparency, hot sticky performance and air-tightness all can serve as the material of substrate layer 320 Material.

Basal layer 310 and substrate layer 320 are stacked together, marker 330 between basal layer 310 and substrate layer 320, And cover the middle part of basal layer 310.The fringe region of basal layer 310 and the fringe region of substrate layer 320 are sealed to be formed Bonding part 325, to form one with good air-tightness, the closed accommodating space that gas can be prevented to pass through.It is illustrating Embodiment in, bonding part 325 be annular, have certain width.Substrate layer 320 and base in one of the embodiments, The contact surface material of bottom 310 is identical, so that identical material at high temperature can be real by intermolecular fusion when hot melt adhesive Existing gluing-free.Certainly, in other examples, the fringe region of the fringe region of basal layer 310 and substrate layer 320 can be with Bonding part 325 is adhesively-bonded together to form by glue.

Dielectric layer 350 is between basal layer 310 and substrate layer 320, and dielectric layer 350 is set to bonding part 325, and covers The partial region at 310 edge of basal layer, for reducing the cohesive force of 325 partial region of bonding part.In the illustrated embodiment, Dielectric layer 350 covers the part of the surface product of the fringe region of substrate layer 320 or the fringe region of basal layer 310.Dielectric layer 350 is Sheet, width of the dielectric layer 350 in the bonding part 325 at the position where the size of the width direction of bonding part 325 and dielectric layer 350 Spend identical, 350 autoadhesion portion 325 of dielectric layer extends to bonding part 325 far from marker 330 close to the side of marker 330 Side.The material of dielectric layer 350 is selected from least one of common ink, UV gloss oil, organic silicone oil and anodized aluminium.In bonding part 325 setting dielectric layers 350 facilitate so as to reduce cohesive force at the position of setting dielectric layer 350 by the substrate of this position Layer 310 separates the gap to be formed and be volatilized away for volatile acid with substrate layer 320.The width in gap is 1mm~50mm.

Marker 330 is carbon dioxide sensitivity marker, oxygen sensitive marker, acid-sensitive marker or the instruction of alkali sensitivity Layer.

Marker 330 is contained in the accommodating space of host body 340.Marker 330 is including adsorbent and is adsorbed on absorption The indication composition of body.Carrier of the adsorbent as carrying indication composition, has micropore property to adsorb indication composition. The pH value of adsorbent itself is in neutrality, so as to avoid impacting indication composition.The material of adsorbent is polytetrafluoro Ethylene microporous barrier, glass fibre porous film, microporous polypropylene membrane, pure pulp fibres, nylon fiber or cloth need to illustrate certainly , the material that any pH value is in neutrality, and can absorb liquid through capillary action all can serve as the material of adsorbent.Absorption Body with a thickness of 1 μm~1000 μm, the average pore size of adsorbent micropore is 1nm~5000nm.

Indication composition is carbon dioxide sensitivity indication composition, oxygen sensitive indication composition, acid-sensitive instruction combination Object or alkali sensitivity indication composition.

Protective layer 370 is laminated in 320 surface of substrate layer to protect substrate layer 320.Protective layer 370 can be protection oil reservoir or guarantor Cuticular layer.The material of protective layer 370 in water-based gloss oil, aqueous mute oil, UV gloss oil PET film and PP film at least one Kind.

Adhesive layer 380 is formed in a side surface of the basal layer 310 far from marker 330.Adhesive layer 380 is for referring to discoloration Showing device 300 is adhered to the material of the surface adhesive layer 380 of other articles in acrylic resin, pressure sensitive adhesive and polyurethane It is at least one.

Peeling layer 385 is adhered to the surface of adhesive layer 380.Preferably, peeling layer 385 for glassine paper or is coated with silicone oil Paper, so as to the sur-face peeling by peeling layer 385 from adhesive layer 380.

Starter 390 is used to open the enclosure space of the formation of host body 340, waves volatile acid from host body 340 It sends out.In the illustrated embodiment, starter 390 is the handgrip for facilitating gripping.Starter 390 and substrate layer 320 correspond to the edge connection of the position of dielectric layer 350.To, by pullling starter 390, to substrate layer 320 1 to On active force set since the presence of dielectric layer 350 reduces the cohesive force of the bonding part 325 at 350 place position of dielectric layer The position for setting dielectric layer 350 is opened easily, and a breathable gap occurs, so that volatile acid is received certainly by gap The inside of volume 340 is volatilized away, and acid-sensitive discoloration instruction device 300 is activated.

In the illustrated embodiment, starter 390 is rectangular patch, is two-layer structure, first layer and substrate layer 320 It is integrally formed, the second layer and protective layer 370 are integrally formed, and the edge of starter 390 from substrate layer 320 extends outwardly.

In the illustrated embodiment, the junction of starter 390 and substrate layer 320 and protective layer 370 is formed with pressure Trace 392 is held so that starter 390 tilts slightly to the direction far from basal layer 310 with facilitating.

Above-mentioned acid-sensitive discoloration instruction device 300, by adjusting the adjustment color change cycle that can be convenient of size in gap；Make Used time gently pulls starter 390, gives substrate layer 320 1 upward active forces, since the presence of dielectric layer 350 reduces The cohesive force of the bonding part 325 at 350 place position of dielectric layer is opened easily in the position of setting dielectric layer 350, occurs one Breathable gap, volatile acid are volatilized by gap from the inside of host body 340,300 quilt of acid-sensitive discoloration instruction device Activation, volatile acid volatilize from the inside of host body 340, and the pH value in marker changes, and pH indicator is with pH Color gradient occurs for the change of value, when the shelf-life after the color change cycle of marker 330 opens packaging with product is consistent, people It can be intuitively concluded that when the color that marker is shown is close to starting color by comparing, show that product is very fresh, Can be safe to use, when the color that marker is shown and close intermediate color, shows that product has placed a period of time, do not go bad, It should use as early as possible, when the color and terminal colour that marker is shown are close, show that product has gone bad, should not continue to use.Acid For the marker of sensitive discoloration instruction device by absorption preparation, technique is relatively easy.

Acid-sensitive discoloration instruction device 300 can cooperate individual colorimetric card to use, or print in the specification of product Colorimetric card, colorimetric card provide reference color or other information.

Referring to Fig. 6, the structure of the acid-sensitive discoloration instruction device 400 of an embodiment and acid-sensitive discoloration instruction device 200 structure is roughly the same, and acid-sensitive discoloration instruction device 400 includes basal layer 410, substrate layer 420, marker 430, protection Layer 470, adhesive layer 480, peeling layer 485 and starter 490, difference is, acid-sensitive discoloration instruction device 400 does not include Layer is compared, other structures are identical as the structure of sensitive discoloration instruction device 200.

Basal layer 410 is for carrying marker 430.Basal layer 410 has good air-tightness, gas can be prevented to penetrate Basal layer 410.The material of basal layer 410 be polyethylene (PE), polypropylene (PP), polyethylene terephthalate (PET) or Surface recombination has the composite material of above-mentioned material.Composite material can be common PET/aluminium foil/heat-sealing PET composite material ("/" Represent stacking, similarly hereinafter), common PP/ aluminium foil/heat-sealing CPP composite material, LDPE/ aluminium foil/PP composite material, HDPE/ aluminium foil/PET Composite material.Wherein CPP represents un-stretched polypropylene.Pass through printing or compound opaque material in one of the embodiments, The methods of, non-transparent material is set by basal layer 410.Certainly, it should be noted that the material of basal layer 410 is not limited to Material is stated, other materials with good hot sticky performance and air-tightness all can serve as the material of basal layer 410.

Substrate layer 420 is used to cooperatively form the host body 440 for accommodating marker 430 with basal layer 410.Substrate layer 420 have good transparency, so as to observe the face for the marker 430 being housed in host body 440 by substrate layer 420 Color.The material of substrate layer 420 is polyethylene (PE), polypropylene (PP), polyethylene terephthalate (PET) or surface recombination There is the composite transparent material of above-mentioned material.Composite transparent material can be common PET/heat-sealing PET composite material, common PP/ Seal CPP composite material, LDPE/PP composite material, HDPE/PET composite material.Certainly, it should be noted that substrate layer 420 Material be not limited to above-mentioned material, other materials with the good transparency, hot sticky performance and air-tightness all can serve as base The material of material layer 420.

Basal layer 410 and substrate layer 420 are stacked together, marker 430 between basal layer 410 and substrate layer 420, And cover the middle part of basal layer 410.The fringe region of basal layer 410 and the fringe region of substrate layer 420 are sealed to be formed Bonding part 425, to form one with good air-tightness, the closed accommodating space that gas can be prevented to pass through.Wherein In one embodiment, substrate layer 420 is identical as the contact surface material of basal layer 410, so that identical material exists when hot melt adhesive Under high temperature gluing-free can be realized by intermolecular fusion.Certainly, in other examples, the marginal zone of basal layer 410 The fringe region of domain and substrate layer 420 can be adhesively-bonded together to form bonding part 425 by glue.

Marker 430 is carbon dioxide sensitivity marker, oxygen sensitive marker, acid-sensitive marker or the instruction of alkali sensitivity Layer.

Marker 430 is contained in the accommodating space of host body 440.Marker 430 is including adsorbent and is adsorbed on absorption The indication composition of body.Carrier of the adsorbent as carrying indication composition, has micropore property to adsorb indication composition. The pH value of adsorbent itself is in neutrality, so as to avoid adversely affecting indication composition.The material of adsorbent is poly- Tetrafluoroethene microporous barrier, glass fibre porous film, microporous polypropylene membrane, pure pulp fibres, nylon fiber or cloth need certainly Illustrate, any pH value is in neutrality, and the material that can absorb liquid through capillary action all can serve as the material of adsorbent. Adsorbent with a thickness of 1 μm~2000 μm, the average pore size of adsorbent micropore is 1nm~5000nm.

Protective layer 470 is laminated in the surface of substrate layer 420 to protect substrate layer 420.Protective layer 470 can for protection oil reservoir or Protective film layer.The material of protective layer 470 in water-based gloss oil, aqueous mute oil, UV gloss oil PP film and PET film at least one Kind.

Adhesive layer 480 is formed in a side surface of the basal layer 410 far from marker 430.Adhesive layer 480 is for referring to discoloration Showing device 400 is adhered to the material of the surface adhesive layer 480 of other articles in acrylic resin, pressure sensitive adhesive and polyurethane It is at least one.

Peeling layer 485 is adhered to the surface of adhesive layer 480.Preferably, peeling layer 485 for glassine paper or is coated with silicone oil Paper, so as to the sur-face peeling by peeling layer 485 from adhesive layer 480.

Starter 490 is used to open the enclosure space of the formation of host body 440, makes volatile acid from inside host body 440 Volatilization is gone out.

In the illustrated embodiment, starter 490 includes venthole 492 and the sealing for closing venthole 492 Part 494.Venthole 492 is opened in host body 440, for the opening of host body 440 to be made volatile acid volatilization escape, specifically, Venthole 492 run through protective layer 470 and substrate layer 420, so as to so that volatile acid host body 440 inside volatilize escape, Acid-sensitive discoloration instruction device 400 is activated.492 aperture of venthole is 1mm~15mm.

Sealing element 494 is barrier film, the material of sealing element 494 be selected from PET film, PP film, PVC film, aluminizer and comprising At least one of composite material of above-mentioned material.Sealing element 494 affixes to protective layer 470 and closes by bonding glue-line 496 Venthole 492.The material for bonding glue-line 496 is selected from least one of UV glue, pressure sensitive adhesive and polyurethane.In the embodiment party of diagram In formula, 494 one end of sealing element extends to form the handgrip for facilitating gripping.In use, handgrip is caught to remove sealing element 494, thus 492 volatile acid of venthole is opened from the volatilization escape of the inside of host body 440.

Above-mentioned acid-sensitive discoloration instruction device 400, by adjusting the adjustment color change cycle that can be convenient of diameter of venthole； In use, gently pullling starter 490, sealing element 494 is removed, opens venthole 492 so that volatile acid passes through Venthole volatilizees from the inside of host body 440 escapes, and acid-sensitive discoloration instruction device 400 is activated, and volatile acid passes through ventilation Hole is volatilized escape from the inside of host body 440, and the pH value of marker changes, the color of marker with changing, when When the color change cycle of marker 430 is consistent with the shelf-life after product opening packaging, people, which can pass through, compares reference color and sight It examines the color that window is shown intuitively to be concluded that when the color that observation window is shown is close to starting color, shows product very It is fresh, can be safe to use, when the color that observation window is shown and close intermediate color, show that product has placed a period of time, not It is rotten, it should use as early as possible, when the color and terminal colour that observation window is shown are close, show that product has gone bad, should not continue to make With.For the marker of acid-sensitive discoloration instruction device by absorption preparation, technique is relatively easy.

Acid-sensitive discoloration instruction device 400 can cooperate individual colorimetric card to use, or print in the specification of product Colorimetric card.

Hereinafter, being illustrated in connection with specific embodiments.

Embodiment 1

The acid-sensitive discoloration instruction device structure of embodiment 1 is as shown in Figure 1, include basal layer 110, substrate layer 120, instruction Layer 130, compares layer 160, protective layer 170, adhesive layer 180, peeling layer 185 and starter 190 at dielectric layer 150.

Wherein, the material of basal layer 110 is common PET/aluminium foil/heat-sealing PET composite material, the material of substrate layer 120 For common PET/heat-sealing PET composite material, when heat-sealing, the heat-sealing PET of basal layer is contacted with the heat-sealing PET material of substrate layer, The hot melt adhesive at the temperature and pressure effect of heat-sealing version.Marker 130 includes adsorbent and the key group for being adsorbed on adsorbent Object is closed, the material of adsorbent is microporous teflon membran, and with a thickness of 10 μm, the average pore size of adsorbent micropore is 30nm, is referred to Show that composition includes 0.01 part of phenol red and 0.1 part of glacial acetic acid.

The fringe region of basal layer 110 and the fringe region of substrate layer 120 are sealed to form bonding part 125, bonding Portion 125 is annular, and width 10mm, the material of dielectric layer 150 is UV gloss oil.

Comparing layer 160 includes buff, light yellow and three kinds of colors of light red, provides the starting face of indication composition respectively Color, intermediate color and terminal colour.

The material of protective layer 170 is PET film, and the material of adhesive layer 180 is pressure sensitive adhesive, and the material of peeling layer 185 is glass Glass paper.

In use, pullling starter 190, give substrate layer 120 1 upward active forces, due to depositing for dielectric layer 150 In the cohesive force for the bonding part 125 for reducing 150 place position of dielectric layer, it is opened easily in the position of setting dielectric layer 150, There is a breathable gap, width is 5mm at the minimum in gap.At this point, the instruction device is activated, volatile acid passes through It volatilizees and escapes in the host body 140 that gap is made of underlayment 110 and substrate layer 120, the pH value of indication composition changes, The pH sensitive dye colour for including in indication composition gradually becomes light yellow from buff, eventually becomes light red, at 4 DEG C Under environment, color change cycle is 20 hours.Since the pH value of marker adsorbent is in neutrality, absorption instruction component not with it is any The substance of pH value non-neutral contacts (except volatile acid), influence to indicate component discoloration factor only one, that is, pass through absorption The volatilization of volatile acid changes colour, and therefore, the discoloration clocking effect accuracy of instruction device substantially enhances.

Traditional instruction device is needed using instruction ink printing instruction layer for the printing adaptability requirement for meeting ink It joined a large amount of binder and a small amount of auxiliary agent in ink, there are two the factors for influencing ink discoloration: first is that passing through volatilization Property acid volatilization change colour, second is that, influenced to change colour by non-neutral substance in ink composition.It is demonstrated experimentally that binder and Auxiliary agent pH value causes both sides to influence: on the one hand, due to joined a large amount of bonding in non-neutral (mostly weakly acidic) Agent causes to indicate that component is diluted, lighter, on the other hand, indicates that the initial ph value of component because volatile acid is in acidity, adds After the binder and auxiliary agent (mostly weakly acidic) that enter non-neutral, ink entirety pH value is reduced, and the color of pH sensitive dyestuff becomes Shallowly, both sides factor causes ink colour saturation relatively low jointly, and ink is in light yellow after printing, that is, is in the face of " fresh " state Color is light yellow.Volatile acid volatilization in component is indicated after activation, in transformation region ink, color is caused to change, due to viscous It ties agent accounting in cured printing ink and is greater than 70%, therefore, pH value (faintly acid) determines that the terminal colour of ink is weak yellow, I.e. ink can only fade to weak yellow from light yellow, and color change interval is small.By above-mentioned comparison it is found that using instruction provided by the invention Device can greatly improve the color change interval of instruction accuracy and instruction device.

Embodiment 2

The acid-sensitive discoloration instruction device structure of embodiment 2 is as shown in Figure 1, include basal layer 110, substrate layer 120, instruction Layer 130, compares layer 160, protective layer 170, adhesive layer 180, peeling layer 185 and starter 190 at dielectric layer 150.

Wherein, the material of basal layer 110 is common PET/aluminium foil/heat-sealing PET composite material, the material of substrate layer 120 For common PET/heat-sealing PET composite material, when heat-sealing, the heat-sealing PET of basal layer is contacted with the heat-sealing PET material of substrate layer, The hot melt adhesive at the temperature and pressure effect of heat-sealing version.Marker 130 includes adsorbent and the key group for being adsorbed on adsorbent Object is closed, the material of adsorbent is microporous teflon membran, and with a thickness of 10 μm, the average pore size of adsorbent micropore is 30nm, is referred to Show that composition includes 0.01 part of phenol red, 0.05 part of sodium hydroxide and 0.1 part of glacial acetic acid.

Comparing layer 160 includes buff, orange and three kinds of colors of peony, provides the starting face of indication composition respectively Color, intermediate color and terminal colour.

In use, pullling starter 190, give substrate layer 120 1 upward active forces, due to depositing for dielectric layer 150 In the cohesive force for the bonding part 125 for reducing 150 place position of dielectric layer, it is opened easily in the position of setting dielectric layer 150, There is a breathable gap, width is 5mm at the minimum in gap.At this point, the instruction device is activated, volatile acid passes through It volatilizees and escapes in the host body 140 that gap is made of underlayment 110 and substrate layer 120, the pH value of indication composition changes, The pH sensitive dye colour for including in indication composition gradually becomes orange from buff, after volatile acid volatilizees completely, Hydrolysis of the component because of strong base-weak acid salt sodium acetate is indicated in alkalinity, therefore, instruction component eventually becomes peony.In 4 DEG C of ring Under border, color change cycle is 14 hours.Since the pH value of marker adsorbent is in neutrality, absorption instruction component not with any pH Be worth non-neutral substance contact (except volatility acid and alkali), influence indicate component discoloration factor only one, that is, pass through suction The volatilization for receiving volatile acid changes colour, and therefore, the discoloration clocking effect accuracy of instruction device substantially enhances.

Embodiment 3

The acid-sensitive discoloration instruction device structure of embodiment 3 is as shown in Figure 1, include basal layer 110, substrate layer 120, instruction Layer 130, compares layer 160, protective layer 170, adhesive layer 180, peeling layer 185 and starter 190 at dielectric layer 150.

Wherein, the material of basal layer 110 is common PP/ aluminium foil/heat-sealing CPP composite material, and the material of substrate layer 120 is general Logical PP/ seals CPP composite material, when heat-sealing, the heat-sealing CPP material of the heat-sealing CPP and substrate layer of basal layer, in heat-sealing version Temperature and pressure act on lower hot melt adhesive.Marker 130 includes adsorbent and the indication composition for being adsorbed on adsorbent, absorption The material of body is glass fibre porous film, and with a thickness of 2000 μm, the average pore size of adsorbent micropore is 5000nm, indication composition Propionic acid including 20 parts of m-cresol purples and 50 parts.

The fringe region of basal layer 110 and the fringe region of substrate layer 120 are sealed to form bonding part 125, bonding Portion 125 is annular, and width 10mm, the material of dielectric layer 150 is organic silicone oil.

Comparing layer 160 includes buff, light yellow and weak three kinds of colors of yellow, provides the starting face of indication composition respectively Color, intermediate color and terminal colour.

The material of protective layer 170 is PP film, and the material of adhesive layer 180 is polyurethane, and the material of peeling layer 185 is coating There is the paper of silicone oil.

In use, pullling starter 190, give substrate layer 120 1 upward active forces, due to depositing for dielectric layer 150 In the cohesive force for the bonding part 125 for reducing 150 place position of dielectric layer, it is opened easily in the position of setting dielectric layer 150, There is a breathable gap, width is 10mm at the minimum in gap.In the environment of 4 DEG C, acid-sensitive discoloration instruction device Color change cycle be 14 days.

Embodiment 4

The acid-sensitive discoloration instruction device structure of embodiment 4 is as shown in Figure 1, include basal layer 110, substrate layer 120, instruction Layer 130, compares layer 160, protective layer 170, adhesive layer 180, peeling layer 185 and starter 190 at dielectric layer 150.

Wherein, the material of basal layer 110 is common PP/ aluminium foil/heat-sealing CPP composite material, and the material of substrate layer 120 is general Logical PP/ seals CPP composite material, when heat-sealing, the heat-sealing CPP material of the heat-sealing CPP and substrate layer of basal layer, in heat-sealing version Temperature and pressure act on lower hot melt adhesive.Marker 130 includes adsorbent and the indication composition for being adsorbed on adsorbent, absorption The material of body is glass fibre porous film, and with a thickness of 2000 μm, the average pore size of adsorbent micropore is 5000nm, indication composition Including 20 parts of m-cresol purples, 10 parts of potassium hydroxide and 50 parts of propionic acid.

Comparing layer 160 includes buff, orange and three kinds of colors of aubergine, provides the starting face of indication composition respectively Color, intermediate color and terminal colour.

In use, pullling starter 190, give substrate layer 120 1 upward active forces, due to depositing for dielectric layer 150 In the cohesive force for the bonding part 125 for reducing 150 place position of dielectric layer, it is opened easily in the position of setting dielectric layer 150, There is a breathable gap, width is 10mm at the minimum in gap.

In the environment of 4 DEG C, the color change cycle of acid-sensitive discoloration instruction device is 10 days.

Embodiment 5

The acid-sensitive discoloration instruction device structure of embodiment 5 is as shown in Figure 1, include basal layer 110, substrate layer 120, instruction Layer 130, compares layer 160, protective layer 170, adhesive layer 180, peeling layer 185 and starter 190 at dielectric layer 150.

Wherein, the material of basal layer 110 is LDPE/ aluminium foil/PP composite material, and the material of substrate layer 120 is multiple for LDPE/PP Condensation material, when heat-sealing, the LDPE of basal layer and the LDPE material of substrate layer, the heat at the temperature and pressure effect of heat-sealing version Fusible conjunction.Marker 130 includes adsorbent and the indication composition for being adsorbed on adsorbent, and the material of adsorbent is that glass fibre is micro- Pore membrane, with a thickness of 1 μm, the average pore size of adsorbent micropore is 1nm, indication composition include 10 parts cresol red, 10 parts of hydrogen-oxygens Change magnesium and 40 parts of butyric acid.

The fringe region of basal layer 110 and the fringe region of substrate layer 120 are sealed to form bonding part 125, bonding Portion 125 is annular, and the material of dielectric layer 150 is anodized aluminium.

The material of protective layer 170 is water-based gloss oil, and the material of adhesive layer 180 is acrylic resin, the material of peeling layer 185 For glassine paper.

In use, pullling starter 190, give substrate layer 120 1 upward active forces, due to depositing for dielectric layer 150 In the cohesive force for the bonding part 125 for reducing 150 place position of dielectric layer, it is opened easily in the position of setting dielectric layer 150, There is a breathable gap, width is 3mm at the minimum in gap.

In the environment of 4 DEG C, the color change cycle of acid-sensitive discoloration instruction device is 20 days.

Embodiment 6

The acid-sensitive discoloration instruction device structure of embodiment 6 is as shown in figure 5, include basal layer 310, substrate layer 320, instruction Layer 330, dielectric layer 350, protective layer 370, adhesive layer 380, peeling layer 385 and starter 390.

Wherein, the material of basal layer 310 is HDPE/ aluminium foil/PET composite material, and the material of substrate layer 320 is HDPE/PET Composite material, when heat-sealing, the HDPE of basal layer is contacted with the HDPE material of substrate layer, at the temperature and pressure effect of heat-sealing version Hot melt adhesive.Marker 330 includes adsorbent and the indication composition for being adsorbed on adsorbent, and the material of adsorbent is polytetrafluoroethyl-ne Alkene microporous barrier, with a thickness of 500 μm, the average pore size of adsorbent micropore is 2000nm, and indication composition includes 10 parts of thymol Blue, 20 parts of sodium hydroxides and 50 parts of acetic anhydride.

The fringe region of basal layer 310 and the fringe region of substrate layer 320 are sealed to form bonding part 325, bonding Portion 325 is annular, and the material of dielectric layer 350 is common ink.

The material of protective layer 370 is PET film, and the material of adhesive layer 380 is pressure sensitive adhesive, and the material of peeling layer 385 is glass Glass paper.

In use, pullling starter 390, give substrate layer 320 1 upward active forces, due to depositing for dielectric layer 350 In the cohesive force for the bonding part 325 for reducing 350 place position of dielectric layer, it is opened easily in the position of setting dielectric layer 350, There is a breathable gap, width is 4mm at the minimum in gap.

It compares card and includes yellow, green and blue three kinds of colors, respectively the starting color of offer indication composition, intermediate face Color and terminal colour.

In the environment of 4 DEG C, the color change cycle of acid-sensitive discoloration instruction device is 18 days.

Embodiment 7

The structure of the acid-sensitive discoloration instruction device of embodiment 7 is roughly the same with embodiment 1, and difference is, gap Width is 8mm at minimum, and in the environment of 4 DEG C, color change cycle is 14 hours.

Embodiment 8

The structure of the acid-sensitive discoloration instruction device of embodiment 8 is roughly the same with embodiment 2, and difference is, gap Width is 8mm at minimum, and in the environment of 4 DEG C, color change cycle is 10 hours.

Embodiment 9

The structure of the acid-sensitive discoloration instruction device of embodiment 9 is roughly the same with embodiment 3, and difference is, gap Width is 15mm at minimum, and in the environment of 4 DEG C, color change cycle is 10 days.

Embodiment 10

The structure of the acid-sensitive discoloration instruction device of embodiment 10 is roughly the same with embodiment 4, and difference is, gap Width is 15mm at minimum, and in the environment of 4 DEG C, color change cycle is 8 days.

Embodiment 11

The structure of the acid-sensitive discoloration instruction device of embodiment 11 is roughly the same with embodiment 5, and difference is, gap Width is 5mm at minimum, and in the environment of 4 DEG C, color change cycle is 14 days.

Embodiment 12

The structure of the acid-sensitive discoloration instruction device of embodiment 12 is roughly the same with embodiment 6, and difference is, gap Width is 8mm at minimum, and in the environment of 4 DEG C, color change cycle is 10 days.

Each technical characteristic of embodiment described above can be combined arbitrarily, for simplicity of description, not to above-mentioned reality It applies all possible combination of each technical characteristic in example to be all described, as long as however, the combination of these technical characteristics is not deposited In contradiction, all should be considered as described in this specification.

The embodiments described above only express several embodiments of the present invention, and the description thereof is more specific and detailed, but simultaneously It cannot therefore be construed as limiting the scope of the patent.It should be pointed out that coming for those of ordinary skill in the art It says, without departing from the inventive concept of the premise, various modifications and improvements can be made, these belong to protection of the invention Range.Therefore, the scope of protection of the patent of the invention shall be subject to the appended claims.

Claims

1. a kind of acid-sensitive discoloration instruction device characterized by comprising

Marker, marker include adsorbent and are adsorbed on the intracorporal indication composition of the absorption, the indication composition with Mass fraction meter, the volatile acid including 10 parts~20 parts of pH indicators and 40 parts~50 parts, the pH indicator choosing From m-cresol purple, thymolphthalein, o-cresolphthalein, bromthymol blue, cresol red, cetyltrimethyl ammonium cation, neutrality At least one of red, phenol red, rhodamine, Sulforhodamine 101 and thymol blue, the volatile acid are volatile carboxylic acid；

Substrate layer, covers the instruction layer surface, and the substrate layer is transparent material, the side of the substrate layer and the basal layer Edge is tightly connected the host body to be formed and can obstruct gas, and the marker is contained in the enclosure space of the host body；

Starter is connect with the edge of the substrate layer, and the starter can drive the substrate layer to far from the base The direction of bottom moves, and is unfolded into the edge of the substrate layer and the basal layer and supplies the volatile acid from the closing The gap of space volatilization.

2. acid-sensitive discoloration instruction device according to claim 1, which is characterized in that the indication composition further includes 10 Part~100 parts of solvent, the solvent is selected from least one of ethyl alcohol, methanol, isopropanol, acetone and water.

3. acid-sensitive discoloration instruction device according to claim 1, which is characterized in that the fringe region of the substrate layer with The fringe region of the basal layer is adhesively-bonded together to form bonding part.

4. acid-sensitive discoloration instruction device according to claim 3, which is characterized in that the acid-sensitive discoloration instruction device It further include for reducing the dielectric layer of the cohesive force of bonding part partial region, the dielectric layer is set to the bonding part, is given an account of Matter layer covers the part of the surface product of the fringe region of the substrate layer or the fringe region of the basal layer, and from the bonding part Edge far from the marker extends to the edge of the close marker of the bonding part, the starter and the base Material layer corresponds to the edge connection of the position of dielectric layer.

5. acid-sensitive discoloration instruction device according to claim 4, which is characterized in that the material of the dielectric layer is selected from general At least one of logical ink, UV gloss oil, organic silicone oil and anodized aluminium.

6. acid-sensitive discoloration instruction device according to claim 4, which is characterized in that the starter is for convenience of gripping Handgrip, the starter and the substrate layer be integrally formed, and the side in the region of the dielectric layer is equipped with from the substrate layer Edge extends outwardly.

7. acid-sensitive discoloration instruction device according to claim 6, which is characterized in that the starter and the substrate The junction of layer is formed with impression.

8. acid-sensitive discoloration instruction device according to claim 1, which is characterized in that further include being formed in the substrate layer The comparison layer on surface, the comparison layer include observation window and comparison portion, and the observation window corresponds to the marker, the comparison Portion provides reference color.

9. acid-sensitive discoloration instruction device according to claim 8, which is characterized in that further include being laminated in the comparison layer Surface be used for protect it is described compare layer protective layer.

10. acid-sensitive discoloration instruction device according to claim 1, which is characterized in that the indication composition further includes 0.05 part~30 parts of alkali, the alkali are selected from least one of sodium hydroxide, magnesium hydroxide, potassium hydroxide and lithium hydroxide.