CN110746533A - Preparation method of acrylate back coating liquid and preparation method of carbon ribbon - Google Patents
Preparation method of acrylate back coating liquid and preparation method of carbon ribbon Download PDFInfo
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- CN110746533A CN110746533A CN201910933022.6A CN201910933022A CN110746533A CN 110746533 A CN110746533 A CN 110746533A CN 201910933022 A CN201910933022 A CN 201910933022A CN 110746533 A CN110746533 A CN 110746533A
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- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08F—MACROMOLECULAR COMPOUNDS OBTAINED BY REACTIONS ONLY INVOLVING CARBON-TO-CARBON UNSATURATED BONDS
- C08F220/00—Copolymers of compounds having one or more unsaturated aliphatic radicals, each having only one carbon-to-carbon double bond, and only one being terminated by only one carboxyl radical or a salt, anhydride ester, amide, imide or nitrile thereof
- C08F220/02—Monocarboxylic acids having less than ten carbon atoms; Derivatives thereof
- C08F220/10—Esters
- C08F220/12—Esters of monohydric alcohols or phenols
- C08F220/14—Methyl esters, e.g. methyl (meth)acrylate
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B41—PRINTING; LINING MACHINES; TYPEWRITERS; STAMPS
- B41J—TYPEWRITERS; SELECTIVE PRINTING MECHANISMS, i.e. MECHANISMS PRINTING OTHERWISE THAN FROM A FORME; CORRECTION OF TYPOGRAPHICAL ERRORS
- B41J31/00—Ink ribbons; Renovating or testing ink ribbons
- B41J31/05—Ink ribbons having coatings other than impression-material coatings
- B41J31/06—Ink ribbons having coatings other than impression-material coatings the coatings being directly on the base material, i.e. below impression transfer material; Ink ribbons having base material impregnated with material other than impression material
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- C—CHEMISTRY; METALLURGY
- C09—DYES; PAINTS; POLISHES; NATURAL RESINS; ADHESIVES; COMPOSITIONS NOT OTHERWISE PROVIDED FOR; APPLICATIONS OF MATERIALS NOT OTHERWISE PROVIDED FOR
- C09D—COATING COMPOSITIONS, e.g. PAINTS, VARNISHES OR LACQUERS; FILLING PASTES; CHEMICAL PAINT OR INK REMOVERS; INKS; CORRECTING FLUIDS; WOODSTAINS; PASTES OR SOLIDS FOR COLOURING OR PRINTING; USE OF MATERIALS THEREFOR
- C09D143/00—Coating compositions based on homopolymers or copolymers of compounds having one or more unsaturated aliphatic radicals, each having only one carbon-to-carbon double bond, and containing boron, silicon, phosphorus, selenium, tellurium, or a metal; Coating compositions based on derivatives of such polymers
- C09D143/04—Homopolymers or copolymers of monomers containing silicon
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- Chemical Kinetics & Catalysis (AREA)
- Medicinal Chemistry (AREA)
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- Life Sciences & Earth Sciences (AREA)
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Abstract
The invention discloses a preparation method of an acrylate back coating liquid and a preparation method of a carbon ribbon, 1) 60-68 parts of methyl methacrylate, 5-10 parts of butyl acrylate, 22-35 parts of dimethyl siloxane methacrylate, 0.5-0.8 part of an initiator and 100-120 parts of a solvent are prepared as raw materials; 2) polymerization reaction: a preparation method of a carbon ribbon comprises the following steps of diluting a back coating solution prepared by the preparation method of an acrylate back coating solution and coating, wherein the back coating solution is diluted by a solvent: the mass portion of the solvent is 100, and the mass portion of the back coating liquid is 1.5-3. The carbon ribbon prepared by the invention has good heat resistance and smoothness.
Description
Technical Field
The invention relates to the technical field of thermal transfer printing, in particular to a preparation method of an acrylate back coating liquid and a preparation method of a carbon ribbon.
Background
The thermal transfer ribbon is also called a bar code thermal transfer ribbon, is an important material in the printing of a bar code printer, and is mainly matched with the bar code printer by adopting a thermal transfer printing technology. In the specific use process, under the action of heat and pressure of a printing head of the bar code printer, characters and bar code information on the bar code carbon ribbon are transferred to the label. The bar code carbon ribbon structurally comprises an ink layer, an inner coating, a ribbon base and a back coating which are sequentially stacked. The back coating is a coating coated on the back of the carbon ribbon and can play a role in reducing the abrasion of the printing head, reducing the generation of static electricity and improving the heat conduction.
The carbon ribbon back coating specifically comprises: where in direct contact with the printhead of the printer, the role of the ribbon backing is to protect the printhead during unwinding of the ribbon (from a wound state), provide excellent thermal conductivity so that ink can be transferred to the media, thereby reducing the formation of static electricity which is detrimental to the printer and printer operator, and thus extending the useful life of the printhead. In the thermal transfer process, the thermal transfer ribbon needs to bear the high temperature instantaneously generated by the thermal printing head, so a back coating layer is required to be coated on one side of the base material (PET film), the back coating layer not only needs to have higher heat resistance, but also needs to have good smoothness so as to ensure the smoothness of the transfer process, and more importantly, the back coating layer and the base material have excellent adhesion performance so as to ensure that the glue does not fall off in the long-time transfer process and avoid the pollution of the printing head. The back coating which is used at home at first is a two-component system of an organic silicon resin reinforcing agent, and has the defects of high curing temperature, poor adhesion performance to a base material and short service life. With the development of the industry, acrylic resin is gradually adopted to modify organic silicon, the adhesive force of the back coating material to a base material is enhanced, but the brittleness of the coating is increased, the noise is larger during printing, and the coating is easy to adhere to a printing head, so that the printing head is polluted, and the printing quality is reduced.
The invention introduces organosilicon molecular chain into polymer (acrylate) to improve its performance, which can make full use of various superior performances of organosilicon and make full use of the characteristics of large usage amount and low cost of general polymer.
In conclusion, in order to solve the problems of the existing carbon ribbon back coating, the invention provides a preparation method and a preparation method of an acrylate back coating liquid with good comprehensive performance and good use effect by introducing an organic silicon molecular chain into a polyacrylate polymer of the back coating.
Disclosure of Invention
The invention aims to solve the problems existing in the prior art and provides a polypropylene/polyvinylidene fluoride blending modified material and a preparation method thereof.
In order to achieve the purpose, the invention adopts the following technical scheme:
the preparation method of the acrylic ester back coating liquid comprises the following raw materials in parts by weight:
1) raw material preparation
60-68 parts of methyl methacrylate, 5-10 parts of butyl acrylate, 22-35 parts of dimethyl siloxane methacrylate, 0.5-0.8 part of initiator and 100-120 parts of solvent;
2) polymerisation reaction
Carrying out polymerization reaction on 60-68 parts of methyl methacrylate, 5-10 parts of butyl acrylate, 22-35 parts of dimethyl siloxane methacrylate, 0.6-0.8 part of initiator and 100-120 parts of solvent to prepare the back coating liquid, wherein the temperature is 60-90 ℃ in the reaction process.
Preferably, the initiator is benzoyl peroxide, and is added in three times, wherein the first addition amount is 0.2-0.5 part.
Preferably, the mass ratio of the dimethyl siloxane methacrylate to the total monomers is 22-35%.
A preparation method of a carbon ribbon comprises the step of diluting a back coating liquid prepared by the preparation method of an acrylate back coating liquid and then coating, wherein the back coating liquid is diluted by a solvent to the mass concentration of 1.5% -3%.
Preferably, the temperature of the oven in the coating process is 100-120 ℃.
Preferably, the coating weight in the coating process is 0.05-0.10 g/m2。
Preferably, the solvent is butanone and toluene in a mass ratio of 1: 1.
Compared with the existing product, the preparation method of the acrylate back coating liquid and the preparation method of the carbon ribbon provided by the invention have the following beneficial effects: 1) the preparation method of the acrylic ester back coating liquid introduces an organic silicon molecular chain into a branched chain of an acrylic ester polymer through free radical polymerization to prepare organic silicon modified acrylic ester back coating emulsion with excellent heat resistance, smoothness and adhesive property; 2) the cost of raw materials in the preparation process of the back coating emulsion is low; 3) the prepared back coating emulsion is used for the carbon ribbon, so that the service life of the carbon ribbon is effectively prolonged, and the problems of carbon ribbon breakdown caused by poor heat resistance, printing head pollution caused by poor smoothness and poor adhesion property of the back coating and a base material, high printing noise caused by brittleness of a coating material and the like are solved due to the good heat resistance and the good smoothness.
Drawings
FIG. 1 is a schematic diagram of the structure of a carbon ribbon prepared by the present invention.
The reference numerals indicate 1-PET film, 2-back coating structure (where ○○○ represents organic chain and ◇◇◇ represents silicone chain), 3-primer layer, 4-ink layer.
Detailed Description
In order to make the objects, technical solutions and advantages of the present invention more clear, the present invention is further described with reference to the following embodiments:
examples 1 to 9 reactions were carried out according to the following procedures
The preparation method of the acrylic ester back coating liquid comprises the following raw materials in parts by weight:
1) raw material preparation
60-68 parts of methyl methacrylate, 5-10 parts of butyl acrylate, 22-35 parts of dimethyl siloxane methacrylate, 0.5-0.8 part of initiator and 100-120 parts of solvent;
2) step of polymerization
Carrying out polymerization reaction on 60-68 parts of methyl methacrylate, 5-10 parts of butyl acrylate, 22-35 parts of dimethyl siloxane methacrylate, 0.6-0.8 part of initiator and 100-120 parts of solvent to prepare the back coating liquid, wherein the temperature is 60-90 ℃ in the reaction process. Wherein, the initiator is preferably benzoyl peroxide and is added for three times, and the first addition amount is 0.2-0.5 part.
A preparation method of a carbon ribbon comprises the step of diluting a back coating liquid prepared by the preparation method of an acrylate back coating liquid and then coating, wherein the back coating liquid is diluted by a solvent, and the mass part of the solvent is 100 parts, and the mass part of the back coating liquid is 1.5-3 parts. The temperature of the oven is controlled to be 100-120 ℃ in the coating process, and the coating process is carried outThe coating weight is 0.05-0.10 g/m2. The solvent is butanone and toluene with the mass ratio of 1: 1.
The heat resistance and the smoothness of the back coating are regulated and controlled by adjusting the part of the silicon-containing monomer, namely the acrylate active organic silicon
The following is illustrated by specific examples:
TABLE 1 influence of the parts by mass of the silicon-containing monomers on the Heat resistance and slip Properties of the backcoatings
| W (organosilicon)/parts | Heat resistance | Printing noise/dB | Contamination of print head | |
| Example 1 | 10 | 4/18 | 88 | More white residue |
| Example 2 | 18 | 4/20 | 85 | More white residue |
| Example 3 | 28 | 4/22 | 80 | Has no residue |
| Example 4 | 35 | 4/22 | 78 | Has no residue |
Note: the proportion of the silicon-containing monomer is the proportion of the acrylate active organic silicon monomer in all monomers in the synthesis process, and the synthesis time is 11 h. The properties shown in the table are all 0.05-0.08 g/m in coating weight2Is measured within the range of (1).
As can be seen from Table 1, when the silicon-containing monomer is present in an amount of 10 to 18 parts by mass, the heat resistance is poor and the printing noise is large; furthermore, the back coating liquid has poor smoothness and more white residues. When the silicon-containing monomer accounts for 28-35%, the performances are optimal, no white residue is left, the printing noise is low, and the heat resistance is good.
The amount of BPO, the first initiator, was adjusted to control the molecular weight of the synthesized product. The following is illustrated by specific examples:
TABLE 2 influence of the amount of first initiator added on the toughness and heat resistance of the backcoatings
| m (BPO)/part | Mn/g.mol-1 | Brittleness/toughness | Heat resistance | Printing noise/dB | Contamination of print head | |
| Example 5 | 1.6 | 21800 | Is relatively brittle | Is preferably used | 89 | More white residue |
| Example 6 | 0.3 | 56900 | Is tougher | Is preferably used | 80 | Has no residue |
Note: the silicon-containing monomers account for 28 percent, the synthesis time is 11 hours, and the coating weight of the back coating during coating is controlled to be 0.05-0.08 g/m2. The amount of BPO indicated in the table above is the amount of initiator added for the first time; molecular weight was determined by GPC; the brittleness and toughness were obtained by observing the state of the back coating liquid after drying.
As can be seen from the above table, in example 5, when the amount of the initiator BPO added for the first time is 1.6 parts, the molecular weight of the synthesized product is low, the back coating liquid is brittle after being dried, the adhesion performance with the substrate is reduced, and the back coating liquid is easy to fall off from the substrate during printing, so that a large amount of white residues are left on the printing head, and the printing noise is large; in example 6, when the amount of the first initiator added, BPO, was 0.5g, the molecular weight was large, and the final product was excellent in toughness and heat resistance and good in various properties.
When the carbon ribbon is prepared, various properties of the prepared carbon ribbon are controlled by the concentration of the back coating liquid and the coating weight. The following is illustrated by specific examples:
TABLE 3 influence of the concentration of the back coating liquid during the preparation of the carbon ribbon on the heat resistance of the carbon ribbon and the print head
| W (Back coating liquid)/%) | Coating weight/g.m-2 | Heat resistance | Printing noise/dB | Contamination of print head | |
| Example 6 | 1％ | 0.03～0.04 | 4/20 | 84 | Small amount of white residue |
| Example 7 | 1.5％ | 0.05～0.06 | 4/22 | 80 | No pollution |
| Example 8 | 3％ | 0.08～0.10 | 4/24 | 78 | No pollution |
| Example 9 | 4％ | 0.12～0.14 | 4/24 | 78 | More white residue |
Note: the heat resistance shown in the above table means the highest energy level (i.e., breakdown level) that the thermal ribbon can withstand, and "4" in 4/20 indicates the printing speed of the printer, "20" indicates the printing energy level of the printer, and 4/20 indicates that the thermal ribbon breaks down when the printing speed is 4 and the energy level is 20. The printing noise was measured by continuously printing 10 decibels on the medium used. The printing head pollution is to continuously print 20000 pieces of printing head on the common coated paper and observe whether the printing head is polluted or not, which directly reflects the smoothness and the bonding performance of the back coating liquid.
In the preparation process of the carbon ribbon, the prepared back coating liquid is diluted by using a solvent, wherein the solvent is butanone and toluene with the mass ratio of 1: 1. The back coating liquid is diluted to 1%, 1.5%, 3% and 4% respectively, and it can be seen from table 3 that when the back coating liquid is diluted to 1.5% -3%, the comprehensive performance is good, and the printing head has no white pollution. When coating, the coating amount of the back coating is low, and the heat transfer performance is good. However, if the coating amount of the back coat is too low, the heat resistance is lowered and the slip property is also lowered. Therefore, the coating amount of the back coating is controlled within a certain reasonable interval. The research shows that when the coating weight of the back coating is 0.05-0.10 g/m2When the printing machine is used, the printing effect is good, the transverse codes and the vertical codes are neat and clear, and the edge of the bar code boundary is not chipped; when the coating amount is less than 0.05/m2When the coating is used, the heat resistance of the back coating is poor, and the carbon ribbon is broken down; when the coating amount is more than 0.10g/m2In time, the bar code boundary is easy to be short of the edge, and the printing effect is poor.
In summary, as shown in FIG. 1, there is a schematic diagram of the structure of the carbon ribbon prepared by the present invention, wherein 1-PET film, 2-back coating structure (wherein ○○○ represents organic chain, ◇◇◇ represents organosilicon chain), 3-primer layer, and 4-ink layer.
According to the invention, an organic silicon molecular chain is introduced into the acrylic polymer through free radical polymerization, and the prepared back coating emulsion is diluted by a solvent for coating, so that the carbon ribbon prepared by coating has excellent performance: the heat resistance, the smoothness and the adhesive property are good. The back coating liquid prepared by the preparation method of the acrylate back coating liquid can effectively solve the problems of carbon ribbon breakdown caused by poor heat resistance, printing head pollution caused by poor smoothness and poor adhesion property of a back coating layer and a base material and high printing noise caused by brittleness of a coating material in the printing process, and is low in cost and long in service life.
The above description is only for the preferred embodiment of the present invention, and not intended to limit the scope of the present invention, and all equivalent modifications made by the present invention are within the scope of the present invention.
Claims (7)
1. The preparation method of the acrylate back coating liquid is characterized by comprising the following raw materials in parts by weight:
1) raw material preparation
60-68 parts of methyl methacrylate, 5-10 parts of butyl acrylate, 22-35 parts of dimethyl siloxane methacrylate, 0.5-0.8 part of initiator and 100-120 parts of solvent;
2) polymerisation reaction
60-68 parts of methyl methacrylate, 5-10 parts of butyl acrylate, 22-35 parts of dimethyl siloxane methacrylate, 0.6-0.8 part of initiator and 100-120 parts of solvent are subjected to polymerization reaction to prepare the back coating liquid, wherein the temperature is 60-90 ℃ in the reaction process, and the reaction time is 10-11 hours.
2. The preparation method of the acrylate back coating liquid according to claim 1, wherein the initiator is benzoyl peroxide, and the initiator is added in three times, and the amount of the initiator added for the first time is 0.2-0.5 parts.
3. The method for preparing the acrylate back coating liquid according to claim 1, wherein the dimethyl siloxane methacrylate is 28 to 35 parts.
4. A method for producing a carbon ribbon, characterized in that the back coating liquid produced by the method for producing an acrylic ester back coating liquid according to any one of claims 1 to 3 is diluted and applied, and the back coating liquid is diluted with a solvent: the mass portion of the solvent is 100, and the mass portion of the back coating liquid is 1.5-3.
5. The method for preparing the carbon ribbon as claimed in claim 4, wherein the temperature of the oven in the coating process is 100-120 ℃.
6. The method for producing a carbon ribbon as claimed in claim 5, wherein the amount of coating is 0.05 to 0.10g/m in the coating process2。
7. The method for preparing the carbon ribbon as claimed in claim 4, wherein the solvent is butanone and toluene in a mass ratio of 1: 1.
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113928034A (en) * | 2021-10-13 | 2022-01-14 | 石家庄沃佳玛智能科技有限公司 | Method for manufacturing scratch-resistant thermal transfer printing ribbon |
| CN114656601A (en) * | 2022-03-31 | 2022-06-24 | 浙江天浩数码科技有限公司 | Preparation method of acrylate modified organic silicon polymer and application of acrylate modified organic silicon polymer in thermal transfer ribbon |
Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107903364A (en) * | 2017-11-23 | 2018-04-13 | 河南省科学院化学研究所有限公司 | Barcode ribbon back coating resin and preparation method thereof and barcode ribbon back coating liquid and its application |
| CN110183925A (en) * | 2019-05-23 | 2019-08-30 | 新乡市新贝尔信息材料有限公司 | A kind of solid material block and preparation method thereof applied for heat transfer colour ribbon back |
-
2019
- 2019-09-29 CN CN201910933022.6A patent/CN110746533A/en active Pending
Patent Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107903364A (en) * | 2017-11-23 | 2018-04-13 | 河南省科学院化学研究所有限公司 | Barcode ribbon back coating resin and preparation method thereof and barcode ribbon back coating liquid and its application |
| CN110183925A (en) * | 2019-05-23 | 2019-08-30 | 新乡市新贝尔信息材料有限公司 | A kind of solid material block and preparation method thereof applied for heat transfer colour ribbon back |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113928034A (en) * | 2021-10-13 | 2022-01-14 | 石家庄沃佳玛智能科技有限公司 | Method for manufacturing scratch-resistant thermal transfer printing ribbon |
| CN114656601A (en) * | 2022-03-31 | 2022-06-24 | 浙江天浩数码科技有限公司 | Preparation method of acrylate modified organic silicon polymer and application of acrylate modified organic silicon polymer in thermal transfer ribbon |
| CN114656601B (en) * | 2022-03-31 | 2024-04-09 | 浙江天浩数码科技有限公司 | Preparation method of acrylic ester modified organosilicon polymer and application of acrylic ester modified organosilicon polymer in thermal transfer printing carbon belt |
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