Color-changing inks, trigger inks, and friction-changing labels

Abstract

The present invention discloses a color-changing ink, a trigger ink, and a friction-changing color label. The color-changing ink comprises the following components: 15 to 45 parts of a first binder, 3 to 10 parts of pheophytin, and 20 to 50 parts of a first solvent; the trigger ink comprises the following components: 15 to 45 parts of a second binder, 1 to 5 parts of a substitute, and 20 to 50 parts of a second solvent, wherein the substitute can undergo a color-changing substitution reaction with the pheophytin. The friction-changing color label comprises a stacked substrate layer and a color-changing layer, wherein the color-changing layer comprises a color-changing region and a trigger region arranged at intervals, wherein the color-changing region is printed with the color-changing ink, and the trigger region is printed with the trigger ink. When a user rubs the color-changing layer of the friction-changing label back and forth with their hands, the substitute component in the trigger region can be transferred to the color-changing region, causing the specific metal ions in the substitute to undergo a color-changing substitution reaction with the pheophytin, thereby achieving a friction-changing color effect.

Description

Technical Field

[0001] The present invention relates to the technical field of inks, and in particular to a color-changing ink, a trigger ink and a friction-changing color label. Background Art

[0002] Chinese patent publication number CN1186408C discloses a friction-changeable color ink. Its color-changing principle involves adding a special tribochromic material, a perylene compound, to the ink. When rubbed with a certain force, the printed mark changes color. However, this friction-changeable color ink has two problems: first, the friction process requires considerable force, and second, the color-changing material used is highly carcinogenic, potentially posing a risk to the human body.

[0003] In view of this, it is necessary to provide a color-changing ink, a trigger ink and a friction-changing color label to solve the above problems. Summary of the Invention

[0004] A first aspect of the present invention provides a color-changing ink.

[0005] A color-changing ink, wherein the raw materials for preparing the color-changing ink include the following components, measured in parts by mass:

[0006] 15 to 45 parts of the first connecting material;

[0007] 3 to 10 parts of pheophytin; and

[0008] 20 to 50 parts of the first solvent.

[0009] In one embodiment, the pheophytin is selected from at least one of pheophytin a, pheophytin b, pheophytin c, pheophytin d, pheophytin protochlorophyll and pheophytin bacteriochlorophyll.

[0010] In one embodiment, the pheophytin is pyropheophytin.

[0011] In one embodiment, 0.5 to 2 parts of a pressure-sensitive adhesive are further included.

[0012] In one embodiment, 0.1 to 0.5 parts of an organic moisture absorbent is further included.

[0013] A second aspect of the present invention provides a trigger ink for triggering the color-changing ink according to any one of the first aspects of the present invention.

[0014] A trigger ink for activating the color-changing ink according to any one of the first aspects of the present invention, wherein the raw materials for preparing the trigger ink include the following components, measured in parts by mass:

[0015] 15 to 45 parts of the second connecting material;

[0016] 1 to 5 parts of a substitute; and

[0017] 20 to 50 parts of the second solvent;

[0018] The substituent can undergo a color-changing substitution reaction with pheophytin.

[0019] In one embodiment, the substituent is a compound containing copper ions, zinc ions, or calcium ions.

[0020] In one embodiment, 1 to 3 parts of solid lubricating adsorbent material are further included.

[0021] In one embodiment, the solid lubricating adsorbent material is graphite and boron nitride.

[0022] The third aspect of the present invention further provides a friction-chromic label.

[0023] A friction-changing color label, comprising:

[0024] substrate layers; and

[0025] A color-changing layer is stacked on top of the substrate layer, and the color-changing layer includes a color-changing area and a triggering area arranged at intervals. The color-changing area is obtained by printing the color-changing ink described in any one of the first aspects of the present invention, and the triggering area is obtained by printing the triggering ink described in any one of the second aspects of the present invention.

[0026] The above-mentioned friction color-changing label has a color-changing area and a trigger area separated by a distance. When the user rubs the color-changing layer of the label back and forth with his hands, the substitute component in the trigger area can be transferred to the color-changing area, so that the specific metal ions in the substitute react with pheophytin to undergo a color-changing substitution reaction, thereby achieving a friction color-changing effect.

[0027] The friction color-changing label has the following advantages: 1) the substituent component in the trigger area can be transferred to the color-changing area by just gentle friction, thereby achieving a convenient color-changing effect; 2) the color-changing ink and the trigger ink do not contain harmful substances, and are safe and reliable. BRIEF DESCRIPTION OF THE DRAWINGS

[0028] Figure 1 This is a schematic structural diagram of a friction color changing label according to one embodiment;

[0029] Figure 2 Schematic diagram of the structure of a friction color-changing label in another embodiment. DETAILED DESCRIPTION

[0030] To make the above-mentioned objects, features, and advantages of the present invention more readily apparent, specific embodiments of the present invention are described in detail below with reference to the accompanying drawings. The following description sets forth numerous specific details to facilitate a full understanding of the present invention. However, the present invention can be implemented in many other ways than those described herein, and those skilled in the art may make similar modifications without departing from the scope of the present invention. Therefore, the present invention is not limited to the specific embodiments disclosed below.

[0031] It should be noted that when an element is referred to as being "fixed to" another element, it may be directly on the other element or there may be an intermediate element. When an element is considered to be "connected" or "communicating" with another element, it may be directly connected to the other element or there may be an intermediate element. The terms "upper," "lower," "vertical," "horizontal," "left," "right," and similar expressions used herein are for illustrative purposes only and do not represent the only implementation methods.

[0032] The color-changing ink, trigger ink and friction-changing color label provided by the present invention will be further described in detail below mainly with reference to the accompanying drawings and specific embodiments.

[0033] The color-changing ink of one embodiment is prepared from raw materials comprising the following components, measured in parts by mass: 15 to 45 parts of a first vehicle, 3 to 10 parts of pheophytin, and 20 to 50 parts of a first solvent.

[0034] The first connecting material has a mass fraction of 15 to 45 parts and can be dissolved in the first solvent. In the color-changing ink, the first connecting material plays a role in drying and forming a film, so that the color-changing ink can be firmly attached to the surface of the object after drying.

[0035] It should be understood that any vehicle sold on the market can be used as the first vehicle of the color-changing ink of the present invention.

[0036] Pheophytin is obtained by replacing the magnesium atoms in the porphyrin ring of chlorophyll with hydrogen atoms, and its mass fraction is 3 to 10 parts. Pheophytin acts as a pigment in color-changing inks. Pheophytin has a primary color of brown. When pheophytin comes into contact with specific metal ions in the substituent, the hydrogen atoms in the porphyrin ring of the pheophytin undergo a color-changing substitution reaction with the specific metal ions in the substituent, forming a metal-ion-substituted chlorophyll. In this process, its color changes to the secondary color of green.

[0037] Optionally, the pheophytin is selected from at least one of pheophytin a, pheophytin b, pheophytin c, pheophytin d, pheophytin protochlorophyll and pheophytin bacteriochlorophyll.

[0038] Furthermore, pheophytin is pyropheophytin, which can also undergo a substitution color change reaction with specific metal ions. Compared with pheophytin, in the molecular structure of pyropheophytin, in addition to the magnesium ion being replaced, the methyl ester group is also removed, and the keto group of the ring is also converted to an enol form. Surprisingly, due to this change in molecular structure, on the one hand, pyropheophytin has higher photostability and thermal stability than pheophytin; on the other hand, pyropheophytin has a darker first color brown than conventional pheophytin, resulting in a more obvious color change when undergoing a color change substitution reaction with specific metal ions.

[0039] The first solvent is used to dissolve the first connecting material, and its weight ratio is 20 to 50 parts. Optionally, the first solvent is water or an organic solvent.

[0040] Preferably, the first solvent is an organic solvent, which can dissolve pheophytin, thereby improving the dispersion effect of the color-changing ink.

[0041] In another embodiment, the color-changing ink further includes 0.1 to 1 parts of a pH regulator. By adding the pH regulator, the color-changing ink maintains a weakly acidic environment. On the one hand, in a weakly acidic environment, hydrogen ions can prevent brown pheophytin from combining with magnesium ions to reform green chlorophyll, causing the color-changing ink to produce an interfering color change; on the other hand, the weakly acidic environment can promote the conversion of pheophytin into pyropheophytin, which is beneficial to improving the light stability and thermal stability of pheophytin.

[0042] In another embodiment, the color-changing ink further comprises 0.5 to 2 parts of a pressure-sensitive adhesive. By adding a predetermined amount of the pressure-sensitive adhesive, the color-changing ink exhibits weak tack after drying. When a user rubs the security label with their finger, the tackiness is not too strong to prevent friction. Furthermore, the color-changing ink adheres to and transfers to the substituent in the triggering ink, thereby improving contact efficiency between the substituent and pheophytin, thereby enhancing the friction-changing effect.

[0043] Optionally, the pressure-sensitive adhesive is selected from at least one of polyvinyl acetate, acrylic emulsion and natural rubber. The above adhesive not only makes the color-changing ink weakly sticky, but also has the feature of being removable, so that the color-changing ink will not stick to other objects due to its stickiness after drying.

[0044] In another embodiment, the color-changing ink further includes 0.1 to 0.5 parts of an organic desiccant. By adding a certain amount of the organic desiccant, on the one hand, the organic desiccant has polarity and can dissolve pheophytin, allowing pheophytin to maintain a high molecular movement rate; on the other hand, the organic desiccant can maintain a certain water content in the color-changing ink. When the user transfers the substitute component to the top of the color-changing ink through friction, the higher water content helps promote the hydrolysis of the substitute, so that the substitute is in an ionic state, thereby promoting a color-changing substitution reaction between pheophytin and specific metal ions.

[0045] Optionally, the organic moisture absorbent is selected from at least one of ethylene glycol, propylene glycol, and N-methylpyrrolidone.

[0046] In another embodiment, the color-changing ink further includes 0.5 to 1 parts of an antioxidant. By adding an appropriate amount of antioxidant, the antioxidant properties of pheophytin can be enhanced, preventing pheophytin from oxidizing and fading, thereby enhancing the stability of the color-changing ink.

[0047] Optionally, antioxidants include but are not limited to: tea polyphenols, vitamin E, anthocyanidins, lutein and ascorbyl palmitate.

[0048] A trigger ink according to one embodiment is used to trigger the color-changing ink. The raw materials for preparing the trigger ink include the following components, measured by mass: 15 to 45 parts of a second binder, 1 to 5 parts of a substitute, and 20 to 50 parts of a second solvent.

[0049] The second binder has a mass fraction of 15 to 45 parts and can be dissolved in the second solvent. In the trigger ink, the second binder plays a role in drying and forming a film, so that the trigger ink can adhere to the surface of the object after drying.

[0050] It should be understood that any vehicle available on the market can be used as the second vehicle of the trigger ink of the present invention.

[0051] The substituent has a mass fraction of 1 to 5 parts, and contains specific metal ions that can undergo a color-changing substitution reaction with pheophytin, thereby causing the color-changing ink to undergo a color-changing reaction.

[0052] Specifically, the specific metal ions that can undergo color-changing substitution reactions with pheophytin include copper ions, zinc ions and calcium ions. Copper ions, zinc ions and calcium ions can respectively undergo color-changing substitution reactions with pheophytin to generate copper-substituted chlorophyll, zinc-substituted chlorophyll and calcium-substituted chlorophyll with a second color of green. Copper-substituted chlorophyll, zinc-substituted chlorophyll and calcium-substituted chlorophyll have excellent light stability and heat stability and are often used to make plant specimens.

[0053] Optionally, the copper ion-containing substitutes include, but are not limited to, copper sulfate, copper chloride, copper hydroxide, copper nitrate, and fatty acid copper.

[0054] Optionally, the zinc ion-containing substituent includes, but is not limited to, zinc hydroxide, zinc chloride, zinc nitrate, zinc carbonate, and zinc carbonate.

[0055] Optionally, the calcium ion-containing substitute includes but is not limited to: calcium oxide, calcium hydroxide, calcium chloride, and calcium sulfate.

[0056] Preferably, the specific metal ion contained in the substituent is zinc ion, which is non-toxic and harmless and has high safety.

[0057] The second solvent is used to dissolve the second connecting material and the substituent, and its weight ratio is 20 to 50. Optionally, the second solvent is water or an organic solvent.

[0058] In another embodiment, the trigger ink further comprises 1 to 3 parts of a solid lubricating adsorbent material. The solid lubricating adsorbent material has lubricating and adsorbing properties. The addition of the solid lubricating adsorbent material helps to improve the transfer efficiency of the substitute when the user rubs the trigger ink surface with his fingers.

[0059] Specifically, the solid lubricating adsorption material has a layered molecular structure, and the molecular levels are combined together by van der Waals forces. During the friction process, the molecular levels are easily delaminated and fall off, which helps to improve the friction transfer efficiency of the triggering ink; in addition, the solid lubricating adsorption material has a large porosity in its molecular structure, which makes it have strong adsorption properties. It can adsorb specific metal ions in the substituent. When the solid lubricating adsorption material is transferred with friction, the specific metal ions are also transferred, which is beneficial to improve the efficiency of the color-changing substitution reaction.

[0060] Optionally, the solid lubricating material includes but is not limited to graphite and boron nitride.

[0061] Preferably, the solid lubricating material is boron nitride, which is white in color and is also called white graphite. It will not cause color interference to the triggering ink and the color-changing substitution reaction.

[0062] See also Figure 1 A friction color-changing label according to one embodiment includes a substrate layer 10 and a color-changing layer 20 .

[0063] The substrate layer 10 is used to support the color-changing layer 20 .

[0064] Optional materials for the substrate layer 10 include, but are not limited to, PVC film, PET film, PP film, and paper.

[0065] The color-changing layer 20 is stacked on the substrate layer 10. The color-changing layer 20 includes a color-changing area 21 and a triggering area 22 that are spaced apart. The color-changing area 21 is printed by any of the color-changing inks described above, and the triggering area 22 is printed by any of the triggering inks described above.

[0066] It should be understood that the spacing setting can be a left and right spacing setting, an upper and lower spacing setting, or an inner and outer spacing setting.

[0067] In this embodiment, the trigger area 22 and the color changing area 21 are arranged inside and outside the concentric circle. When the user's finger rubs on the color changing layer 20, it can be ensured that the material falling off from the trigger area 22 will be transferred to the color changing area 21, thereby causing a color change substitution reaction.

[0068] In another embodiment, see Figure 2 The friction color changing label further includes a protective layer 30, which is removably laminated on the side of the color changing layer 20 away from the substrate layer 10. The protective layer 30 is used to protect the color changing layer 20 and prevent the pheophytin in the color changing ink from being oxidized. When in use, the protective layer 30 can be removed.

[0069] In the above-mentioned friction color-changing label, the color-changing area 21 and the trigger area 22 are arranged at intervals. When the user rubs the label color-changing layer 20 back and forth with his hands, the substitute component in the trigger area 22 can be transferred to the color-changing area 21, so that the specific metal ions in the substitute react with pheophytin to undergo a color-changing substitution reaction, thereby achieving the friction color-changing effect.

[0070] The friction color-changing label has the following advantages: 1) the substituent component in the trigger area 22 can be transferred to the color-changing area 21 by just gentle friction, thereby achieving a convenient color-changing effect; 2) the color-changing ink and the trigger ink do not contain harmful substances, and are safe and reliable.

[0071] The following are specific examples.

[0072] Example 1

[0073] A first aspect of this embodiment provides a color-changing ink comprising 15 parts of a first binder, 3 parts of pheophytin a, and 20 parts of a first solvent. The first binder is polyvinyl butyral (brand name: Wanwei) supplied by Shanghai Chenqi Chemical Technology Co., Ltd.; pheophytin a is available under the product number ZWK-167-13771 and supplied by Shanghai Zhenzhun Biotechnology Co., Ltd.; and the first solvent is ethanol.

[0074] A second aspect of this embodiment provides a trigger ink comprising 15 parts of a second binder, 1 part of a substitute, and 20 parts of a second solvent. The second binder is a water-soluble acrylic resin, model SK6450Y-1, supplied by Shanghai Shuai Ke Chemical Co., Ltd.; the substitute is zinc sulfate, model yj160, supplied by Langfang Qianyao Technology Co., Ltd.; and the second solvent is water.

[0075] The third aspect of this embodiment provides a friction color change label. Figure 1 and Figure 2 The friction color-changing label includes a substrate layer 10 and a color-changing layer 20. The substrate layer 10 is paper. The color-changing layer 20 includes a color-changing area 21 and a trigger area 22 arranged at intervals, and the color-changing area 21 and the trigger area 22 are arranged in concentric circles. The color-changing area 21 is printed by the color-changing ink provided by the first aspect of this embodiment, and the trigger area 22 is printed by the trigger ink provided by the second aspect of this embodiment.

[0076] In the above-mentioned friction color-changing label, the color-changing area 21 and the trigger area 22 are arranged at intervals. When the user rubs the label color-changing layer 20 back and forth with his hands, the substitute component in the trigger area 22 can be transferred to the color-changing area 21, so that the specific metal ions in the substitute react with pheophytin to undergo a color-changing substitution reaction, thereby achieving the friction color-changing effect.

[0077] The friction color-changing label has the following advantages: 1) during the friction process, only light friction is required to transfer the substituent component in the trigger area 22 to the color-changing area 21, thereby achieving a convenient color-changing effect; 2) the color-changing ink and the trigger ink do not contain harmful substances, and are safe and reliable.

[0078] Example 2

[0079] A first aspect of this embodiment provides a color-changing ink comprising 30 parts of a first binder, 6 parts of pheophytin a, 35 parts of a first solvent, and 0.5 parts of a pressure-sensitive adhesive. The first binder is a water-soluble acrylic resin, model SK6450Y-1, supplied by Shanghai Shuai Ke Chemical Co., Ltd.; pheophytin a is available as ZWK-167-13771, supplied by Shanghai Zhenzhun Biotechnology Co., Ltd.; the first solvent is water; and the pressure-sensitive adhesive is an acrylic emulsion, model 603A, supplied by Dongguan Wanjiang Jianda Adhesive Products Co., Ltd.

[0080] The color-changing ink, by adding a predetermined amount of pressure-sensitive adhesive, has a weak stickiness characteristic after drying, which helps to improve the contact efficiency between the substitute and pheophytin, thereby enhancing the friction color-changing effect.

[0081] A second aspect of this embodiment provides a trigger ink comprising 30 parts of a second binder, 3 parts of a substitute, 35 parts of a second solvent, and 1 part of a solid lubricant adsorbent. The second binder is a water-soluble acrylic resin, model SK6450Y-1, supplied by Shanghai Shuai Ke Chemical Co., Ltd.; the substitute is analytical-grade copper sulfate, item number 0074, supplied by Langfang Qianyao Technology Co., Ltd.; the second solvent is water; and the solid lubricant adsorbent is boron nitride powder supplied by Shandong Fangyuan High-Conductivity Ceramics Co., Ltd.

[0082] The trigger ink, by adding a solid lubricating adsorbent material, helps to improve the transfer efficiency of the substitute when the user rubs the ink surface with his fingers.

[0083] Example 3

[0084] A first aspect of this embodiment provides a color-changing ink comprising 45 parts of a first binder, 10 parts of pheophytin a, 50 parts of a first solvent, 1 part of a pressure-sensitive adhesive, and 0.5 parts of an organic moisture absorbent. The suppliers of the first binder, pheophytin a, and the pressure-sensitive adhesive are the same as those in Example 2, and the organic moisture absorbent is glycerin.

[0085] The above-mentioned color-changing ink is made by adding a certain amount of organic desiccant. On the one hand, the organic desiccant is polar and can dissolve pheophytin, allowing pheophytin to maintain a high molecular movement rate; on the other hand, the organic desiccant can maintain a certain water content in the color-changing ink. When the user transfers the substitute component to the top of the color-changing ink through friction, the higher water content helps to promote the hydrolysis of the substitute, thereby promoting the color-changing substitution reaction between pheophytin and specific metal ions.

[0086] A second aspect of this embodiment provides a trigger ink comprising 45 parts of a second binder, 5 parts of a substitute, 50 parts of a second solvent, and 3 parts of a solid lubricant adsorbent. The second binder, substitute, and solid lubricant adsorbent are of the same type and supplier as in Example 2.

[0087] The above-described embodiments merely illustrate several implementations of the present invention, and while their descriptions are relatively specific and detailed, they should not be construed as limiting the scope of the patent. It should be noted that a person skilled in the art would be able to make numerous variations and improvements without departing from the spirit of the present invention, all of which fall within the scope of protection of the present invention. Therefore, the scope of protection of the patent for this invention shall be determined by the appended claims.

Claims

1. A friction color changing label, characterized in that: include: substrate layer; as well as a color-changing layer, laminated on the substrate layer, comprising color-changing regions and triggering regions spaced apart, the color-changing regions being printed with color-changing ink, and the triggering regions being printed with triggering ink; The raw materials for preparing the color-changing ink include the following components measured by mass: 15 to 45 parts of the first connecting material; 3 to 10 parts of pheophytin; and 20 to 50 parts of the first solvent; The raw materials for preparing the trigger ink include the following components measured by mass: 15 to 45 parts of the second connecting material; 1 to 5 parts of a substitute; and 20 to 50 parts of the second solvent; The substituent can undergo a color-changing substitution reaction with pheophytin; The substituent is a compound containing copper ions, zinc ions or calcium ions.

2. The friction color changing label according to claim 1, characterized in that: The pheophytin is selected from at least one of pheophytin a, pheophytin b, pheophytin c, pheophytin d, propheophytin, pyropheophytin and bacteriopheophytin.

3. The friction color changing label according to claim 2, characterized in that: The color-changing ink further comprises 0.5 to 2 parts by mass of a pressure-sensitive adhesive.

4. The friction color changing label according to claim 3, characterized in that: The color-changing ink further comprises 0.1 to 0.5 parts of an organic moisture absorbent by weight.

5. The friction color changing label according to claim 1, characterized in that: The trigger ink further comprises 1 to 3 parts by mass of a solid lubricating adsorption material.

6. The friction color changing label according to claim 5, characterized in that: The solid lubricating adsorption materials are graphite and boron nitride.

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