A thermal transfer material for information recording of PE heat-shrinkable tube and a preparation process thereof

Abstract

The present application relates to the technical field of heat transfer printing material, in particular to a PE heat shrinkable tube information recording heat transfer printing material and a preparation process thereof, which comprises, from bottom to top, a heat-resistant layer, a substrate, a stripping layer, a protective layer and a color development connecting layer; the substrate is a PET film; the heat-resistant layer mainly functions to increase the smoothness of the PE heat shrinkable tube information recording heat transfer printing material, improve the smoothness of the running tape, and reduce static electricity; the stripping layer mainly functions to improve the printing fineness, friction resistance and alcohol resistance; the protective layer mainly functions to improve the alcohol resistance of the product; and the color development connecting layer mainly functions to improve the adhesion and color density (OD value) of the product. The present application solves the problems of poor printing effect and poor universality of the conventional carbon tape on the PE heat shrinkable tube, and can improve the fineness, friction resistance and alcohol resistance of the product.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of heat transfer materials, in particular to a PE heat shrink tube information recording heat transfer material and a preparation process thereof. BACKGROUND

[0002] PE heat shrink tubes are widely used in the fields of electronics, construction, etc., and therefore information recording is crucial in these fields. Existing information recording technologies include heat transfer, inkjet printing, and screen printing, etc., among which heat transfer technology is a commonly used method. However, there are numerous heat shrink tube manufacturers on the market, and the surface characteristics, quality, and standards of heat shrink tubes from each manufacturer are different, in addition to the fact that the printing performance such as resolution of each model of line printer is different, which also requires heat transfer ribbons to have better universality and higher printing performance. At present, among existing heat transfer ribbons on the market, a ribbon can only be used for heat shrink tubes from a specific manufacturer or a few manufacturers, and does not have universality.

[0003] In view of the problems of existing ribbons in the heat shrink tube printing market, the present application provides a heat transfer material for PE heat shrink tube information recording and a preparation process thereof, aiming to solve the problems of poor transfer effect of traditional ribbons on PE heat shrink tubes, poor universality, etc., and at the same time improve the product fineness, friction resistance, alcohol resistance, etc. SUMMARY

[0004] The purpose of the present application is to overcome the above-mentioned problems in the prior art and develop a heat transfer material for PE heat shrink tube information recording and a preparation process thereof.

[0005] To achieve the above-mentioned purpose, the present application is implemented according to the following technical solutions:

[0006] A heat transfer material for PE heat shrink tube information recording comprises, from bottom to top, a heat-resistant layer, a substrate, and a release layer.

[0007] The heat-resistant layer has a thickness of 0.3-0.5 μm and is made of raw materials with the following mass percentages: 3-5 wt% of acrylic-modified silicone resin, 1-2 wt% of polyester resin or polyurethane, 1-2 wt% of first filler, 1-6 wt% of auxiliary agent, and 85-90 wt% of first solvent.

[0008] The substrate has a thickness of 5-7 μm.

[0009] The release layer has a thickness of 0.8-1.2 μm and is made of raw materials with the following mass percentages: 5-10 wt% of EVA resin, 15-20 wt% of second filler, and 70-80 wt% of first solvent.

[0010] A protective layer with a thickness of 0.3-0.5 μm is made of raw materials with the following mass percentage: 5-10 wt% of acrylic resin, 5-10 wt% of the third filler, 80-90 wt% of the second solvent;

[0011] A color developing adhesive layer with a thickness of 0.8-1 μm is made of raw materials with the following mass percentage: 10-20 wt% of the pigment system, 20-40 wt% of the resin system, 5-10 wt% of the dispersant, and 30-50 wt% of the third solvent.

[0012] Preferably, the auxiliary agent includes a stabilizer, a leveling agent, and an antistatic agent; the first filler includes silicon dioxide; the first solvent includes toluene and butanone, and the mass ratio of toluene and butanone is 2:1.

[0013] Preferably, the stabilizer is di-n-butyltin dilaurate, the antistatic agent is any one of long-chain alkyl quaternary ammonium salt, alkyl sulfonate, alkyl phosphate, dithio carbamate, and ethoxylated fatty alkyl amine; the leveling agent is a polyether-modified silicone water-based leveling agent, and the mass ratio of the stabilizer, the antistatic agent, and the leveling agent is 1:1:1.

[0014] Preferably, the second filler includes wax powder and silicon dioxide, and the mass ratio of the wax powder and silicon dioxide is (5-10):1.

[0015] Preferably, the third filler includes silicon dioxide and carbon black, and the mass ratio of the silicon dioxide and carbon black is 1:(5-10); the second solvent includes toluene and butanone, and the mass ratio of toluene and butanone is 1:1.

[0016] Preferably, the pigment system is made of raw materials with the following weight percentage: 30-40 wt% of carbon black, 30-40 wt% of iron oxide, and 25-35 wt% of silicon dioxide, and the average particle size of the carbon black, the silicon dioxide, and the iron oxide is ≤3 μm.

[0017] The resin system is made of raw materials with the following weight percentage: 10-20 wt% of chloroether resin, 30-40 wt% of phenolic resin, 30-40 wt% of terpene resin, and 20-30 wt% of petroleum resin; the glass transition temperature of the chloroether resin is ≥110℃, and the weight average molecular weight is ≤100,000; the softening point of the phenolic resin and the terpene resin is between 100-120℃, the glass transition temperature of the petroleum resin is ≤100℃, and the weight average molecular weight is greater than 50,000;

[0018] The dispersant is a copolymer of polyester and amide, and the amount added is 4-10% of the pigment system.

[0019] The third solvent is composed of the following raw materials in percentage by weight: butanone 20-30%, cyclohexanone 20-30%, toluene 40-50%, the purity of the toluene, butanone and cyclohexanone being greater than or equal to 99%.

[0020] The chloroether resin in the formula of the color developing adhesive layer has stable ether bond structure and good flexibility between chain segments, so that the chloroether resin has excellent weather resistance and good adhesion to the printing substrate; the phenolic resin has hydroxyl groups which can react with PE material to improve the adhesion; the terpene resin has high glass transition temperature and large molecular weight, so that the terpene resin can improve the state of ink, improve the coloring capacity of pigments and improve the coating environment; the petroleum resin does not contain polar or functional groups in the molecular structure and has no chemical activity, so that the petroleum resin has good stability and is used to improve the alcohol resistance of the product.

[0021] Preferably, the substrate adopts a PET film, so that the problem of broken carbon tape in the carbon tape printing process can be well solved.

[0022] The application further provides a preparation process of the PE heat shrinkable tube information recording heat transfer printing material.

[0023] S1, preparation of the heat-resistant layer

[0024] S11, a certain amount of first solvent is kept at 55-65 DEG C for 1-2 h in a material kettle, and the proportionally weighed acrylic modified silicone resin, polyester resin or polyurethane is dissolved, and the solid content is 10%;

[0025] S12, after cooling to room temperature, the proportionally weighed first filler is added, and stirring is carried out at a rotating speed of 700-800 rpm for 20-30 min;

[0026] S13, the first solvent is further diluted to a solid content of 5% and is coated on a PET film with a thickness of 5-7 mu m, a ceramic anilox roll with a precision of 300-400 lines is used to coat the PET film in the first coating head of a gravure coater, the coating speed is 60-100 m / min, the drying temperature is 60-100 DEG C, the drying time is 8-13 s, and a first combined film is obtained;

[0027] S2, preparation of the peeling layer

[0028] S21, the proportionally weighed first solvent is kept at 55-65 DEG C for 1-2 h in a material kettle, and the proportionally weighed EVA resin is dissolved to be clear and transparent, and the solid content is 20%;

[0029] S22. After cooling to room temperature, add the second filler weighed in proportion, and grind it with a sand mill at a rate of 5 kg / min for 3-5 times to make the average particle size of the material between 0.8-1 μm, and obtain an ink liquid with a viscosity between 30-50 cp.

[0030] S23. When coating, a ceramic anilox roller with a precision of 250-350 lines is used to coat the side of the first composite film away from the heat-resistant layer on the second coating head of the gravure coating machine. The coating speed is 60-100m / min, the drying temperature is 80-100℃, and the drying time is 4-8s to obtain the second composite film.

[0031] S3. Preparation of the protective layer

[0032] S31. Under conditions of 55-65℃, keep the second solvent weighed in proportion in the reaction vessel for 1-2 hours to dissolve the acrylic resin weighed in proportion until it is clear and transparent, with a solid content of 10-15%;

[0033] S32. After cooling to room temperature, add the third filler weighed in proportion, and grind it with a sand mill at a rate of 5 kg / min for 3-5 passes to make the average particle size of the material between 0.8-1.2 μm.

[0034] S33. During coating, a ceramic anilox roller with a precision of 120-150 lines is used to coat the release layer of the second composite film on the third coating head of the gravure coating machine. The coating speed is 60-100m / min, the drying temperature is 80-100℃, and the drying time is 7-10s to obtain the third composite film.

[0035] S4. Preparation of the colorimetric adhesive layer

[0036] S41. Weigh the third solvent according to the proportion, add it to the mixing vessel equipped with a heating diaphragm and a stirring device, and start stirring;

[0037] S42. Add the weighed resin system to the dissolving vessel, turn on the heating, and control the temperature at 50-60℃ until it is completely dissolved and transparent.

[0038] S43. After the material in the refrigeration vessel is cooled to room temperature, the pigment system and dispersant are added in proportion and stirred evenly. Then, the mixture is transferred to a horizontal sand mill and ground at a grinding speed of 5-10 kg / min. After grinding, the heat transfer ink for recording information on PE heat shrink tubing is obtained. The heat transfer ink has a solid content of 30-32% and an average particle size of 1.5-1.6 μm. It is considered qualified if there is no sediment at the bottom of the material bucket after standing for 30 minutes.

[0039] S44. During coating, a ceramic anilox roller with a precision of 300-400 lines is used to coat the protective layer of the third composite film on the fourth coating head of the gravure coating machine. The coating speed is 60-100 m / min, the drying temperature is 80-100℃, and the drying time is 8-13 s, thus obtaining the heat transfer material for information recording of the PE heat shrink tubing.

[0040] In this invention, the heat-resistant layer primarily functions to increase the smoothness of the heat transfer material used for recording information on PE heat shrink tubing, improve tape feeding smoothness, reduce static electricity, and provide excellent protection for the printhead. The acrylic-modified silicone resin in the heat-resistant layer, through the introduction of silicon groups, enhances its inherent abrasion resistance, high-temperature resistance, and adhesion. Both polyester resin and polyurethane are highly adhesive resins. The first filler increases the abrasion resistance of the adhesive backing, reducing wear and peeling caused by friction. The stabilizer prevents the adhesive backing from softening and decomposing, thus affecting heat resistance. The release layer primarily functions to improve transfer precision, abrasion resistance, and alcohol resistance. EVA resin has excellent film-forming properties, and the second filler provides smoothness and abrasion resistance, further improving abrasion resistance. The protective layer primarily functions to improve the product's alcohol resistance. The acrylic resin is preferably a high-Tg, high-molecular-weight resin, which improves the ribbon's alcohol resistance and abrasion resistance. The carbon black is preferably a carbon black with strong adhesion to acrylic resin and strong color development ability. The main function of the color-developing adhesive layer is to improve the product's adhesion and color density (OD value).

[0041] Compared with the prior art, the beneficial effects of the present invention are as follows:

[0042] 1) In this invention, due to its unique pigment system, the uniformity of the ink system is ensured by silicon dioxide, providing good coating conditions, and a series of viscoelastic resins are used to ensure the adhesion of the ink, improve the internal surface tension, ensure the smoothness of the coating surface and the glossy black characteristics of the coating surface, and the high molecular weight and high glass transition temperature of the resin in it ensure its alcohol resistance and abrasion resistance.

[0043] 2) The heat transfer ribbon provided by this invention has the advantages of strong versatility, good abrasion resistance, and applicability to PE heat shrink tubing produced by different manufacturers.

[0044] 3) Through a special ink formula, the carbon ribbon of this invention can achieve high-quality information recording, meeting various information recording needs of PE heat shrink tubing.

[0045] In summary, this invention solves the problems of poor transfer effect and poor versatility of traditional carbon ribbons on PE heat shrink tubing, while also improving the product's precision, abrasion resistance, and alcohol resistance. Detailed Implementation

[0046] The present invention will be further described below with reference to specific embodiments. The illustrative embodiments and descriptions herein are used to explain the present invention, but are not intended to limit the present invention.

[0047] Example 1

[0048] This embodiment proposes a heat transfer material for recording information on PE heat shrink tubing.

[0049] From bottom to top, they include:

[0050] The heat-resistant layer, with a thickness of 0.3 μm, is made from the following raw materials in the following mass percentages: 3 wt% acrylic-modified silicone resin, 2 wt% polyester resin, 2 wt% silica, 3 wt% additives, and 90 wt% first solvent; the first solvent includes toluene and methyl ethyl ketone (MEK), with a mass ratio of toluene to MEK of 2:1. The additives include a stabilizer, a leveling agent, and an antistatic agent; the stabilizer is di-n-butyltin dilaurate, and the antistatic agent is alkyl phosphate; the leveling agent is a polyether-modified silicone water-based leveling agent, and the mass ratio of the stabilizer, antistatic agent, and leveling agent is 1:1:1.

[0051] Substrate: PET film with a thickness of 5μm;

[0052] The release layer, with a thickness of 0.8 μm, is made of the following raw materials in the following mass percentages: 5 wt% EVA resin, 15 wt% second filler, and 80 wt% first solvent; the second filler includes wax powder and silica, and the mass ratio of wax powder to silica is 10:1.

[0053] The protective layer, with a thickness of 0.3 μm, is made from the following raw materials in the following mass percentages: 5 wt% acrylic resin, 5 wt% third filler, and 90 wt% second solvent; the third filler includes silica and carbon black, and the mass ratio of silica to carbon black is 1:10; the second solvent includes toluene and methyl ethyl ketone, and the mass ratio of toluene to methyl ethyl ketone is 1:1.

[0054] The color-developing adhesive layer, with a thickness of 0.8 μm, is made from the following raw materials in the following mass percentages: 10 wt% pigment system, 35 wt% resin system, 5 wt% dispersant and 50 wt% third solvent.

[0055] The pigment system is composed of the following raw materials by weight percentage: 30 wt% carbon black, 40 wt% iron oxide, and 30 wt% silicon dioxide, with the average particle size of carbon black, silicon dioxide, and iron oxide ≤ 3 μm.

[0056] The resin system is composed of the following raw materials in weight percentages: 10 wt% chloroether resin, 30 wt% phenolic resin, 30 wt% terpene resin, and 30 wt% petroleum resin. The chloroether resin has a glass transition temperature ≥110℃ and a weight-average molecular weight ≤100,000. The phenolic resin and terpene resin have softening points between 100-120℃, and the petroleum resin has a glass transition temperature ≤100℃ and a weight-average molecular weight greater than 50,000.

[0057] The dispersant is a copolymer of polyester and amide, and its addition amount is 4% of the pigment system;

[0058] The third solvent is composed of the following raw materials in weight percentage: 20% butanone, 30% cyclohexanone, and 50% toluene, wherein the purity of the toluene, butanone, and cyclohexanone is ≥99%.

[0059] The preparation process of the heat transfer material used for recording information on the aforementioned PE heat shrink tubing includes the following steps:

[0060] S1. Preparation of the heat-resistant layer

[0061] S11. Under conditions of 55-65℃, a certain amount of the first solvent is kept in a reaction vessel for 1-2 hours to dissolve the acrylic-modified silicone resin, polyester resin or polyurethane weighed in proportion, with a solid content of 10%.

[0062] S12. After cooling to room temperature, add the first filler weighed in proportion and stir at 700-800 rpm for 20-30 minutes.

[0063] S13 is then diluted with the first solvent to a solid content of 5% and coated onto a PET film with a thickness of 5-7μm. During coating, a ceramic anilox roller with a precision of 300-400 lines is used on the first coating head of a gravure coating machine. The coating speed is 60-100m / min, the drying temperature is 60-100℃, and the drying time is 8-13s to obtain the first composite film.

[0064] S2. Preparation of the release layer

[0065] S21. Under conditions of 55-65℃, the first solvent weighed in proportion is kept in the reaction vessel for 1-2 hours to dissolve the EVA resin weighed in proportion until it is clear and transparent, with a solid content of 20%.

[0066] S22. After cooling to room temperature, add the second filler weighed in proportion, and grind it with a sand mill at a rate of 5 kg / min for 3-5 times to make the average particle size of the material between 0.8-1 μm, and obtain an ink liquid with a viscosity between 30-50 cp.

[0067] S23. When coating, a ceramic anilox roller with a precision of 250-350 lines is used to coat the side of the first composite film away from the heat-resistant layer on the second coating head of the gravure coating machine. The coating speed is 60-100m / min, the drying temperature is 80-100℃, and the drying time is 4-8s to obtain the second composite film.

[0068] S3. Preparation of the protective layer

[0069] S31. Under conditions of 55-65℃, keep the second solvent weighed in proportion in the reaction vessel for 1-2 hours to dissolve the acrylic resin weighed in proportion until it is clear and transparent, with a solid content of 10-15%;

[0070] S32. After cooling to room temperature, add the third filler weighed in proportion, and grind it with a sand mill at a rate of 5 kg / min for 3-5 passes to make the average particle size of the material between 0.8-1.2 μm.

[0071] S33. During coating, a ceramic anilox roller with a precision of 120-150 lines is used to coat the release layer of the second composite film on the third coating head of the gravure coating machine. The coating speed is 60-100m / min, the drying temperature is 80-100℃, and the drying time is 7-10s to obtain the third composite film.

[0072] S4. Preparation of the colorimetric adhesive layer

[0073] S41. Weigh the third solvent according to the proportion, add it to the mixing vessel equipped with a heating diaphragm and a stirring device, and start stirring;

[0074] S42. Add the weighed resin system to the dissolving vessel, turn on the heating, and control the temperature at 50-60℃ until it is completely dissolved and transparent.

[0075] S43. After the material in the refrigeration vessel is cooled to room temperature, the pigment system and dispersant are added in proportion and stirred evenly. Then, the mixture is transferred to a horizontal sand mill and ground at a grinding speed of 5-10 kg / min. After grinding, the heat transfer ink for recording information on PE heat shrink tubing is obtained. The heat transfer ink has a solid content of 30-32% and an average particle size of 1.5-1.6 μm. It is considered qualified if there is no sediment at the bottom of the material bucket after standing for 30 minutes.

[0076] S44. During coating, a ceramic anilox roller with a precision of 300-400 lines is used to coat the protective layer of the third composite film on the fourth coating head of the gravure coating machine. The coating speed is 60-100 m / min, the drying temperature is 80-100℃, and the drying time is 8-13 s, thus obtaining the heat transfer material for information recording of the PE heat shrink tubing.

[0077] Example 2

[0078] The difference from Example 1 is that, in this example, the thickness of the heat-resistant layer is 0.4 μm, and it is made from the following raw materials in the following mass percentages: 4 wt% acrylic modified silicone resin, 2 wt% polyurethane, 2 wt% silica, 4 wt% additives, and 88 wt% first solvent; the antistatic agent is ethoxylated aliphatic alkylamine.

[0079] The substrate thickness is 6μm;

[0080] The release layer has a thickness of 1 μm and is made from the following raw materials in the following mass percentages: 7 wt% EVA resin, 18 wt% second filler, and 75 wt% first solvent; the mass ratio of wax powder to silica in the second filler is 5:1.

[0081] The protective layer has a thickness of 0.4 μm and is made from the following raw materials in the following mass percentages: 8 wt% acrylic resin, 7 wt% third filler, and 85 wt% second solvent; the mass ratio of silica to carbon black in the third filler is 1:8.

[0082] The color-developing adhesive layer, with a thickness of 0.9 μm, is made from the following raw materials in the following mass percentages: 15 wt% pigment system, 30 wt% resin system, 10 wt% dispersant and 45 wt% third solvent.

[0083] The pigment system is composed of the following raw materials by weight percentage: 35 wt% carbon black, 30 wt% iron oxide, and 35 wt% silicon dioxide, with the average particle size of carbon black, silicon dioxide, and iron oxide ≤ 3 μm.

[0084] The resin system is composed of the following raw materials in weight percentages: 15 wt% chlorinated ether resin, 35 wt% phenolic resin, 30 wt% terpene resin, and 20 wt% petroleum resin.

[0085] The dispersant is a copolymer of polyester and amide, and its addition amount is 7% of the pigment system;

[0086] The third solvent is composed of the following raw materials in weight percentage: 25% butanone, 30% cyclohexanone, and 45% toluene, wherein the purity of the toluene, butanone, and cyclohexanone is ≥99%.

[0087] Example 3

[0088] The difference from Example 1 is that, in this example, the thickness of the heat-resistant layer is 0.5 μm, and it is made from the following raw materials in the following mass percentages: 5 wt% acrylic modified silicone resin, 2 wt% polyurethane, 2 wt% silica, 6 wt% additives, and 85 wt% first solvent.

[0089] The substrate thickness is 7μm;

[0090] The release layer has a thickness of 1.2 μm and is made from the following raw materials in the following mass percentages: 10 wt% EVA resin, 20 wt% second filler, and 70 wt% first solvent; in the second filler, the mass ratio of wax powder to silica is 8:1.

[0091] The protective layer has a thickness of 0.5 μm and is made from the following raw materials in the following mass percentages: 10 wt% acrylic resin, 10 wt% third filler, and 80 wt% second solvent; in the third filler, the mass ratio of silica to carbon black is 1:5.

[0092] The color-developing adhesive layer, with a thickness of 1 μm, is made from the following raw materials in the following mass percentages: 20 wt% pigment system, 40 wt% resin system, 10 wt% dispersant and 30 wt% third solvent.

[0093] The pigment system is composed of the following raw materials by weight percentage: 40 wt% carbon black, 35 wt% iron oxide, and 25 wt% silicon dioxide, with the average particle size of carbon black, silicon dioxide, and iron oxide ≤ 3 μm.

[0094] The resin system is composed of the following raw materials in weight percentages: 20 wt% chlorinated ether resin, 30 wt% phenolic resin, 30 wt% terpene resin, and 20 wt% petroleum resin.

[0095] The dispersant is a copolymer of polyester and amide, and its addition amount is 10% of the pigment system;

[0096] The third solvent is composed of the following raw materials in weight percentage: 30% butanone, 30% cyclohexanone, and 40% toluene, wherein the purity of the toluene, butanone, and cyclohexanone is ≥99%.

[0097] The products obtained in Examples 1, 2, and 3 were tested under the following conditions:

[0098] 1. Abrasion resistance test: The test conditions are a 500-gram load, A4 paper as the friction medium, and a test cycle of no less than 50 cycles.

[0099] 2. Alcohol resistance test: The test conditions are 75% alcohol concentration, 500g load, standard cloth (alcohol-supporting medium), and the number of tests is not less than 20.

[0100] The test results show that the product's abrasion resistance and alcohol resistance both meet the corresponding requirements for recording PE heat shrink tubing information.

[0101] The products in each embodiment underwent general testing, and the test results are as follows:

[0102] The print on PE heat shrink tubing is clear and burr-free, and it is compatible with various manufacturers (such as Wolfe, Haojiang, and Elec), different colors (red, yellow, and blue), and different specifications of PE heat shrink tubing (cross-sectional area of ​​2-6mm²). This ribbon is also compatible with many mainstream wire marking printers on the market, such as MAX, Canon, and Shuofang.

[0103] The technical solutions of the present invention are not limited to the specific embodiments described above. Any technical modifications made in accordance with the technical solutions of the present invention fall within the protection scope of the present invention.

Claims

1. A heat transfer material for recording information on PE heat shrink tubing, characterized in that, From bottom to top, they include: The heat-resistant layer, with a thickness of 0.3-0.5 μm, is made from the following raw materials in the following mass percentages: 3-5 wt% acrylic-modified silicone resin, 1-2 wt% polyester resin or polyurethane, 1-2 wt% first filler, 1-6 wt% additives, and 85-90 wt% first solvent; Substrate; thickness 5-7μm; The release layer, with a thickness of 0.8-1.2 μm, is made from the following raw materials in the following mass percentages: 5-10 wt% EVA resin, 15-20 wt% second filler, and 70-80 wt% first solvent; The protective layer, with a thickness of 0.3-0.5 μm, is made from the following raw materials in the following mass percentages: 5-10 wt% acrylic resin, 5-10 wt% third filler, and 80-90 wt% second solvent; The color-developing adhesive layer, with a thickness of 0.8-1 μm, is made from the following raw materials in the following mass percentages: 10-20 wt% pigment system, 20-40 wt% resin system, 5-10 wt% dispersant, and 30-50 wt% third solvent; The pigment system is composed of the following raw materials by weight percentage: 30-40 wt% carbon black, 30-40 wt% iron oxide, and 25-35 wt% silicon dioxide, with the average particle size of carbon black, silicon dioxide, and iron oxide ≤ 3 μm. The resin system is composed of the following raw materials in weight percentages: 10-20 wt% chloroether resin, 30-40 wt% phenolic resin, 30-40 wt% terpene resin, and 20-30 wt% petroleum resin. The chloroether resin has a glass transition temperature ≥110℃ and a weight-average molecular weight ≤100,000. The phenolic resin and terpene resin have softening points between 100-120℃, and the petroleum resin has a glass transition temperature ≤100℃ and a weight-average molecular weight greater than 50,000. The dispersant is a copolymer of polyester and amide, and the amount added is 4-10% of the pigment system; The third solvent is composed of the following raw materials in weight percentage: 20-30% butanone, 20-30% cyclohexanone, and 40-50% toluene, wherein the purity of the toluene, butanone, and cyclohexanone is ≥99%.

2. The heat transfer material for recording information on PE heat shrink tubing according to claim 1, characterized in that, The additives include stabilizers, leveling agents, and antistatic agents; the first filler includes silica; and the first solvent includes toluene and methyl ethyl ketone (MEK), with a mass ratio of toluene to MEK of 2:

1.

3. The heat transfer material for recording information on PE heat shrink tubing according to claim 2, characterized in that, The stabilizer is dibutyltin dilaurate, and the antistatic agent is any one of long-chain alkyl quaternary ammonium salt, alkyl sulfonate, alkyl phosphoric acid, dithiocarbamate, and ethoxylated aliphatic alkylamine; the leveling agent is a polyether-modified organosilicon waterborne leveling agent, and the mass ratio of stabilizer, antistatic agent and leveling agent is 1:1:

1.

4. The heat transfer material for recording information on PE heat shrink tubing according to claim 1, characterized in that, The second filler comprises wax powder and silica, and the mass ratio of wax powder to silica is (5-10):

1.

5. The heat transfer material for recording information on PE heat shrink tubing according to claim 1, characterized in that, The third filler comprises silica and carbon black, with a mass ratio of silica to carbon black of 1:(5-10), and the second solvent comprises toluene and methyl ethyl ketone, with a mass ratio of toluene to methyl ethyl ketone of 1:

1.

6. The heat transfer material for recording information on PE heat shrink tubing according to claim 1, characterized in that, The substrate is made of PET film.

7. The preparation process of the heat transfer material for information recording on PE heat shrink tubing according to any one of claims 1 to 6, characterized in that, Includes the following steps: S1. Preparation of the heat-resistant layer S11. Under conditions of 55-65℃, a certain amount of the first solvent is kept in a reaction vessel for 1-2 hours to dissolve the acrylic modified silicone resin, polyester resin or polyurethane weighed in proportion, with a solid content of 10%. S12. After cooling to room temperature, add the first filler weighed in proportion and stir at 700-800 rpm for 20-30 minutes. S13 is then diluted with the first solvent to a solid content of 5% and coated onto a PET film with a thickness of 5-7μm. During coating, a ceramic anilox roller with a precision of 300-400 lines is used on the first coating head of a gravure coating machine. The coating speed is 60-100m / min, the drying temperature is 60-100℃, and the drying time is 8-13s to obtain the first composite film. S2. Preparation of the release layer S21. Under conditions of 55-65℃, the first solvent weighed in proportion is kept in the reaction vessel for 1-2 hours to dissolve the EVA resin weighed in proportion until it is clear and transparent, with a solid content of 20%. S22. After cooling to room temperature, add the second filler weighed in proportion, and grind it with a sand mill at a rate of 5 kg / min for 3-5 times to make the average particle size of the material between 0.8-1 μm, and obtain an ink liquid with a viscosity between 30-50 cp. S23. When coating, a ceramic anilox roller with a precision of 250-350 lines is used to coat the side of the first composite film away from the heat-resistant layer on the second coating head of the gravure coating machine. The coating speed is 60-100m / min, the drying temperature is 80-100℃, and the drying time is 4-8s to obtain the second composite film. S3. Preparation of the protective layer S31. Under conditions of 55-65℃, keep the second solvent weighed in proportion in the reaction vessel for 1-2 hours to dissolve the acrylic resin weighed in proportion until it is clear and transparent, with a solid content of 10-15%; S32. After cooling to room temperature, add the third filler weighed in proportion, and grind it with a sand mill at a rate of 5 kg / min for 3-5 passes to make the average particle size of the material between 0.8-1.2 μm. S33. During coating, a ceramic anilox roller with a precision of 120-150 lines is used to coat the release layer of the second composite film on the third coating head of the gravure coating machine. The coating speed is 60-100m / min, the drying temperature is 80-100℃, and the drying time is 7-10s to obtain the third composite film. S4. Preparation of the colorimetric adhesive layer S41. Weigh the third solvent according to the proportion, add it to the mixing vessel equipped with a heating diaphragm and a stirring device, and start stirring; S42. Add the weighed resin system to the dissolving vessel, turn on the heating, and control the temperature at 50-60℃ until it is completely dissolved and transparent. S43. After the material in the refrigeration vessel is cooled to room temperature, the pigment system and dispersant are added in proportion and stirred evenly. Then, the mixture is transferred to a horizontal sand mill and ground at a grinding speed of 5-10 kg / min. After grinding, the heat transfer ink for recording information on PE heat shrink tubing is obtained. The heat transfer ink has a solid content of 30-32% and an average particle size of 1.5-1.6 μm. It is considered qualified if there is no sediment at the bottom of the material bucket after standing for 30 minutes. S44. During coating, a ceramic anilox roller with a precision of 300-400 lines is used to coat the protective layer of the third composite film on the fourth coating head of the gravure coating machine. The coating speed is 60-100 m / min, the drying temperature is 80-100℃, and the drying time is 8-13 s, thus obtaining the heat transfer material for information recording of the PE heat shrink tubing.