阅读说明：本技术 一种长效全防热敏材料及其制作方法 (Long-acting full-prevention thermosensitive material and preparation method thereof ) 是由 谷洪涛 李泰明 于 2019-10-15 设计创作，主要内容包括：本发明公开了长效全防热敏材料及其制作方法,所述长效全防热敏材料由下而上依次包括基材层、热敏层、塑封层、高温保护涂层。其中,基材层可使用纸张或薄膜作为本长效全防热敏材料的基础载体；热敏层为通用型的对热敏感材料,遇高温可发色；塑封层使用透明PET薄膜或透明PP薄膜作为阻隔层；塑封层高温保护涂层采用有机硅聚合物、交联剂和催化剂的混合物,经涂布并高温下进行聚合反应而形成,可有效防止塑封层遇高温发生融化。本发明的长效全防热敏材料可长期保存打印内容,具有结构更薄,成本更低的优点。(The invention discloses a long-acting full-protection heat-sensitive material and a manufacturing method thereof. Wherein, the substrate layer can use paper or film as the basic carrier of the long-acting total heat-proof material; the heat-sensitive layer is a general heat-sensitive material and can develop color when meeting high temperature; the plastic packaging layer uses a transparent PET film or a transparent PP film as a barrier layer; the plastic packaging layer high-temperature protective coating is formed by coating and carrying out polymerization reaction at high temperature by adopting a mixture of an organic silicon polymer, a cross-linking agent and a catalyst, and can effectively prevent the plastic packaging layer from melting when meeting high temperature. The long-acting full-heat-proof thermal sensitive material can store printing contents for a long time and has the advantages of thinner structure and lower cost.)

1. A long-acting full-heat-proof material and a manufacturing method thereof are characterized in that: the long-acting full-anti-heat-sensitive material sequentially comprises a base material layer (1), a heat-sensitive layer (2), a plastic packaging layer (3) and a high-temperature protective coating (4) from bottom to top, and the manufacturing method of the long-acting full-anti-heat-sensitive material comprises the following steps:

step one; adding 3-4 parts of hydrosilation cross-linking agent into each 100 parts of polydimethylsiloxane, stirring for a plurality of minutes at a stable rotating speed, slowly adding 2-3 parts of organic platinum catalyst, stirring for a plurality of minutes at a stable rotating speed to obtain a mixture A, and waiting for further treatment;

step two; coating the mixture A obtained in the step one on the surface of a plastic packaging layer (3) at a coating weight of 0.5 g/square meter to 1 g/square meter for further treatment;

step three; baking the plastic packaging layer (3) coated in the step two to enable the mixture A to generate polymerization reaction, curing to form a high-temperature protective coating (4), and waiting for further treatment;

step four: coating the liquid heat-sensitive layer (2) on the substrate layer (1) in a roller coating or curtain coating mode, compounding the plastic packaging layer (3) and the high-temperature protective coating (4) on the liquid heat-sensitive layer (2), and waiting for further treatment;

step five: baking the plastic package layer (3), the high-temperature protective coating (4) and the liquid thermosensitive layer (2) in the fourth step, evaporating water in the liquid thermosensitive layer (2) to form the solid thermosensitive layer (2), and rolling the base material layer (1), the thermosensitive layer (2), the plastic package layer (3) and the high-temperature protective coating (4) simultaneously to integrate the base material layer (1), the thermosensitive layer (2), the plastic package layer (3) and the high-temperature protective coating (4) into a whole, so that the long-acting full-protection thermosensitive material is obtained.

2. The method for preparing a long-acting full-heat-proof thermal sensitive material as claimed in claim 1, wherein: in the first step, the polydimethylsiloxane and the crosslinking agent are stirred at 1450 rpm for 10 minutes, and after the catalyst is added, the polydimethylsiloxane and the crosslinking agent are stirred at 1450 rpm for 10 minutes.

3. The method for preparing a long-acting full-heat-proof thermal sensitive material as claimed in claim 1, wherein: in the second step, the coated plastic packaging layer (3) is baked for 6S-12S in the environment of 100-149 ℃, so that the mixture A can be subjected to polymerization reaction fully; and step five, baking the plastic packaging layer (3), the high-temperature protective coating (4) and the liquid thermosensitive layer in an environment of 80 ℃.

4. The method for preparing a long-acting full-heat-proof thermal sensitive material as claimed in claim 1, wherein: the outer side of the base material layer (1) is coated with a glue coating layer (6), and the glue coating layer (6) is made of pressure-sensitive adhesive.

5. The method for preparing a long-acting full-heat-proof thermal sensitive material as claimed in claim 1, wherein: glue (5) is coated between the thermosensitive layer (2) and the plastic packaging layer (3).

6. The method for preparing a long-acting full-heat-proof thermal sensitive material as claimed in claim 1, wherein: the substrate layer (1) is paper or a film.

7. The method for preparing a long-acting full-heat-proof thermal sensitive material as claimed in claim 1, wherein: the plastic packaging layer (3) is a transparent high-temperature-resistant polyester film or a transparent polypropylene film.

8. The method for preparing a long-acting full-heat-proof thermal sensitive material as claimed in claim 1, wherein: the heat-sensitive layer (2) is made of a thermal sensitive material of a fluorane type and can generate color at high temperature.

Technical Field

The invention relates to an information carrier for variable information printing, in particular to a long-acting full-protection thermosensitive material and a manufacturing method thereof.

Background

The prior heat-sensitive paper and heat-sensitive film are widely applied as convenient and cheap variable information carriers, especially in the fields of express delivery, logistics, retail and the like, but the variable information cannot be stored for a long time (the effective storage time of the prior material is 1-24 months), the surface can only conditionally resist water, oil, plasticizer and alcohol, but does not have the performances of acid solution and alkali solution, and the application range of the heat-sensitive paper and the heat-sensitive film is greatly limited, such as archival data and the like which need to be stored for a long time. When the adhesive tape is used in the field of pressure-sensitive adhesives (also called adhesive stickers), a layer of base paper is required to be matched to be used as a carrier, and the adhesive tape can not be used without the base paper, so that great resource waste and environmental pollution are caused.

Disclosure of Invention

The invention aims to solve the technical problems that unconditional water resistance, oil resistance, plasticizer resistance, alcohol resistance, acid resistance solution and alkaline resistance solution on the surface cannot be realized and the long-acting preservation time of more than 15 years cannot be realized by aiming at the defects of the existing thermosensitive paper and thermosensitive film, and provides a long-acting full-heat-proof material and a preparation method thereof.

The invention realizes the purpose through the following technical scheme: the long-acting full-anti-heat-sensitive material sequentially comprises a base material layer, a heat-sensitive layer, a plastic packaging layer and a high-temperature protective coating from bottom to top, and the manufacturing method of the long-acting full-anti-heat-sensitive material comprises the following steps:

step one; adding 3-4 parts of hydrosilation cross-linking agent into each 100 parts of polydimethylsiloxane, stirring for a plurality of minutes at a stable rotating speed, slowly adding 2-3 parts of organic platinum catalyst, stirring for a plurality of minutes at a stable rotating speed to obtain a mixture A, and waiting for further treatment;

step two; coating the mixture A obtained in the step one on the surface of a plastic packaging layer at a coating weight of 0.5 g/square meter-1 g/square meter for further treatment;

step three; baking the plastic packaging layer coated in the step two to enable the mixture A to generate polymerization reaction, curing to form a high-temperature protective coating, and waiting for further treatment;

step four: coating the liquid heat-sensitive layer on the substrate layer in a roller coating or curtain coating mode, compounding the plastic packaging layer and the high-temperature protective coating on the liquid heat-sensitive layer, and waiting for further treatment;

step five: and C, baking the plastic package layer, the high-temperature protective coating and the liquid thermosensitive layer in the fourth step, evaporating water in the liquid thermosensitive layer to form a solid thermosensitive layer, and rolling the base material layer, the thermosensitive layer, the plastic package layer and the high-temperature protective coating to integrate the base material layer, the thermosensitive layer, the plastic package layer and the high-temperature protective coating into a whole to obtain the long-acting full-protection thermosensitive material.

In a further preferred embodiment of the present invention, in the first step, the polydimethylsiloxane and the crosslinking agent are stirred at 1450 rpm for 10 minutes, and after the catalyst is added, the mixture is stirred at 1450 rpm for 10 minutes, so that the three components are sufficiently and uniformly distributed to form the mixture a.

As a further optimization scheme of the invention, in the second step, the coated plastic package layer is baked for 6S-12S in the environment of 100-149 ℃, so that the mixture A can fully generate polymerization reaction; and step five, baking the plastic packaging layer, the high-temperature protective coating and the liquid thermosensitive layer in an environment of 80 ℃ to evaporate water in the thermosensitive layer without developing color.

As a further optimized scheme of the invention, the outer side of the base material layer is coated with the glue coating layer, and the glue coating layer adopts pressure-sensitive adhesive, can be used for being stuck on the surface of a stuck object and is convenient to use.

As a further optimization scheme of the invention, glue is coated between the thermosensitive layer and the plastic packaging layer, so that the thermosensitive layer and the plastic packaging layer are bonded into a whole.

As a further optimization scheme of the invention, the substrate layer is paper or a film, and can be respectively suitable for a non-liquid soaking environment and a liquid soaking environment.

As a further optimized scheme of the invention, the plastic packaging layer is a transparent high-temperature-resistant polyester film or a transparent polypropylene film. The transparent high-temperature-resistant polyester film or the transparent polypropylene film can effectively realize the separation of water, oil, plasticizer, alcohol and the like, and acidic solution and alkaline solution, and increase the storage time of the pictures and texts.

As a further optimized scheme of the invention, the thermosensitive layer is made of a thermal sensitive material of a fluorane type and develops color at high temperature.

The invention has the beneficial effects that:

through setting up the plastic envelope layer, can effectively realize the separation to water, oil, plasticizer, alcohol etc to and acid solution, alkaline solution, prevent that the heat-sensitive layer from being invaded and moistened, effectively improved the save time of the back picture and text of printing.

Through setting up the high temperature protective layer, can prevent effectively that the plastic envelope layer from receiving the high temperature film in the twinkling of an eye and being melted.

Through coating pressure sensitive adhesive, form printable pressure sensitive adhesive label, need not the end and input the button, can effectively practice thrift the cost, and because there is not the end, effectively reduced this long-term thickness of preventing temperature sensing material entirely, can improve the consumptive material length more than 40% to handheld printer, change consumptive material frequency and reduce more than 40%, effectively practiced thrift manpower and materials.

Drawings

FIG. 1 is a schematic structural diagram of a long-acting total thermosensitive prevention material of the present invention;

FIG. 2 is a schematic view of a second structure of the long-acting total heat-resistant material of the present invention;

FIG. 3 is a schematic view of a third structure of the long-acting total heat-resistant material of the present invention;

1-a substrate layer, 2-a heat-sensitive layer, 3-a plastic packaging layer, 4-a high-temperature protective coating, 5-glue and 6-a glue coating.

Detailed Description

The present application will now be described in further detail with reference to the drawings, it should be noted that the following detailed description is given for illustrative purposes only and is not to be construed as limiting the scope of the present application, as those skilled in the art will be able to make numerous insubstantial modifications and adaptations to the present application based on the above disclosure.