Efficient release roller, preparation method thereof and label printer

Abstract

The invention discloses an efficient release roller, a preparation method thereof and a label printer. The preparation method of the efficient release roller comprises the following steps: obtaining the shaft core main body for later use; coating an adhesive on the outer surface of the shaft core main body; an injection mold is assembled, the shaft core body coated with the adhesive is placed in the injection mold, a liquid material is injected into the injection mold, heating forming is conducted, and an elastic protective sleeve arranged on the shaft core body in a sleeving mode is obtained; and coating the outer surface of the protective sleeve with a coating, and carrying out curing treatment to obtain a coating layer. The high-efficiency release roller produced by the preparation method is mainly used on a driving part of a small backing-paper-free label printer and can be used for backing-paper-free label printing, the printing effect is improved, and energy consumption in the production process is reduced.

Description

Technical Field

[0001] The present application relates to the technical field of label printing, and particularly to an efficient release roller, a preparation method thereof, and a label printer. Background Art

[0002] In the prior art, the small label printers generally use label papers with backing papers, and the cost of using the backing papers and environmental protection issues will follow. The label printers without backing papers will be the main force in the future market demand, and the demand for efficient release rollers used in the corresponding driving parts of the label printers without backing papers will increase greatly. In the prior art, the efficient release roller is obtained by spraying a coating on the surface of a metal shaft. The efficient release roller obtained by spraying on the surface of the metal shaft is heavy in weight, which will increase the weight of the label printer. There is a problem that the small characters on the label paper are not clear on the efficient release roller sprayed on the surface of the metal shaft. The efficient release roller sprayed on the surface of the metal shaft needs to use a special high-temperature oven during preparation, and the energy consumption is too high. Summary of the Invention

[0003] Based on this, it is necessary to provide a preparation method for an efficient release roller. The efficient release roller prepared by the preparation method of the present invention can be used for label printing without backing paper, improve the printing effect, and reduce the energy consumption during the production process.

[0004] An embodiment of the present application provides a preparation method for an efficient release roller.

[0005] A preparation method for an efficient release roller includes the following steps:

[0006] Obtain a core body for standby;

[0007] Coat an adhesive on the outer surface of the core body to form a connection layer;

[0008] Place the core body coated with the adhesive into an injection mold, inject a liquid material into the injection mold, and heat and mold it to obtain a protective sleeve sleeved on the core body;

[0009] And coat a coating on the outer surface of the protective sleeve, and obtain a coating layer after curing treatment.

[0010] In some embodiments, the preparation method for the efficient release roller further includes the following steps: after obtaining the core body, polish the part of the core body that needs to be coated with the adhesive to remove the anti-rust coating, so as to improve the friction between the core body and the protective sleeve.

[0011] In some embodiments, the adhesive includes one or several of reactive adhesives.

[0012] In some of the embodiments, the inner wall of the injection mold has a plurality of lines, the depth of the lines is 0.01 mm to 0.1 mm, and adjacent lines are not connected.

[0013] In some embodiments, during the heating molding, the heating temperature is 140° C. to 150° C., and the heating time is 10 min to 15 min.

[0014] In some of the embodiments, the preparation method of the high-efficiency release roller also includes the following steps: after heating and molding, the protective cover sleeved on the shaft core body is cut and subjected to secondary heating treatment, and the heating temperature during the secondary heating treatment is 180°C~200°C and the heating time is 60min~80min.

[0015] In some embodiments, the coating includes methyl silicone oil, a diluent and a catalyst, wherein the mass ratio of the methyl silicone oil, the diluent and the catalyst is (100~120):(400~600):(1~5).

[0016] In some embodiments, the coating layer has a thickness of 4 μm to 10 μm.

[0017] In some embodiments, the curing process comprises the following steps: curing the sprayed product at a temperature of 150° C. to 180° C. for 0.5 h to 1 h.

[0018] An embodiment of the present application also provides a high-efficiency release roller.

[0019] A high-efficiency release roller is prepared by adopting the above-mentioned preparation method.

[0020] An embodiment of the present application also provides a label printer.

[0021] A label printer comprises a printer body and the above-mentioned high-efficiency release roller.

[0022] The above-mentioned high-efficiency release roller, the high-efficiency release roller produced by the preparation method of the present application is mainly used on the driving component of a small linerless label printer, can be used for linerless label printing, improves printing effect, and reduces energy consumption during the production process.

[0023] Furthermore, the high-efficiency release roller of the present application can reduce the weight and inelasticity of the high-efficiency release roller, which can cause unclear small fonts, by selecting a silicone substrate. The special texture on the inner surface of the molding mold can produce special texture on the surface of the high-efficiency release roller product, reducing the contact area to avoid the risk of paper sticking. The use of low-temperature molded non-stick coating allows the use of ordinary heating equipment in production, thereby reducing energy consumption in the production process and reducing production costs. BRIEF DESCRIPTION OF THE DRAWINGS

[0024] To more clearly illustrate the technical solutions in the embodiments of the present application, the following will briefly introduce the drawings required for the description of the embodiments. Obviously, the drawings in the following description are only some embodiments of the present application. For those skilled in the art, without creative efforts, other drawings can also be obtained based on these drawings.

[0025] To more fully understand the present application and its beneficial effects, the following will be described in conjunction with the drawings. Among them, the same reference numerals in the following description represent the same parts.

[0026] Figure 1 Schematic diagram of an efficient release roller according to an embodiment of the present invention.

[0027] Description of reference numerals

[0028] 10. Efficient release roller; 100. Axle core body; 200. Connection layer; 300. Protective sleeve; 400. Coating layer. Specific embodiments

[0029] To make the above objects, features, and advantages of the present invention more obvious and understandable, the following will describe the specific embodiments of the present invention in detail with reference to the drawings. Many specific details are set forth in the following description in order to fully understand the present invention. However, the present invention can be implemented in many other ways different from those described herein. Those skilled in the art can make similar improvements without departing from the connotation of the present invention. Therefore, the present invention is not limited by the specific embodiments disclosed below.

[0030] In the description of the present invention, it should be understood that the terms "center", "longitudinal", "transverse", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "clockwise", "counterclockwise", "axial", "radial", "circumferential", etc. indicate the orientation or positional relationship based on the orientation or positional relationship shown in the drawings. It is only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation. Therefore, it should not be construed as a limitation of the present invention.

[0031] In the present invention, unless otherwise clearly defined or limited, terms such as "installed", "connected", "linked", "fixed", etc. shall be understood in a broad sense. For example, it may be a fixed connection, a detachable connection, or integrated; it may be a mechanical connection or an electrical connection; it may be directly connected or indirectly connected through an intermediate medium, and it may be the communication inside two components or the interaction relationship between two components, unless otherwise clearly defined. For those of ordinary skill in the art, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0032] In the present invention, unless otherwise clearly defined or limited, the first feature being "on" or "under" the second feature may mean that the first and second features are in direct contact, or the first and second features are in indirect contact through an intermediate medium. Moreover, the first feature being "above", "over" and "on top of" the second feature may mean that the first feature is directly above or obliquely above the second feature, or merely indicates that the first feature has a higher horizontal height than the second feature. The first feature being "under", "beneath" and "underneath" the second feature may mean that the first feature is directly below or obliquely below the second feature, or merely indicates that the first feature has a lower horizontal height than the second feature.

[0033] In the description of the present invention, the meaning of "several" is more than one, the meaning of "multiple" is more than two, and understandings such as "greater than", "less than", "exceeding", etc. do not include the corresponding number, while understandings such as "above", "below", "within", etc. include the corresponding number. If there is a description of "first" and "second", it is only for the purpose of distinguishing technical features and cannot be understood as indicating or implying relative importance or implicitly indicating the quantity of the indicated technical features or implicitly indicating the sequence relationship of the indicated technical features.

[0034] In this article, "optionally", "optional", "option" mean having or not having, that is, any one selected from two parallel options of "having" or "not having". If "optional" appears in multiple places in a technical solution, unless otherwise specified and there is no contradiction or mutual restriction relationship, each "optional" is independent. In this application, descriptions such as "optionally contain" and "optionally include" mean "containing or not containing".

[0035] In this article, unless otherwise stated, each reaction step can be carried out in the order described in the text, or can be carried out not in the order described in the text. For example, other steps may be included between each reaction step, and the reaction steps can also be appropriately reordered. This can be determined by those skilled in the art according to common knowledge and experience. Preferably, the reaction methods in this article are carried out in sequence.

[0036] In the present application, when it comes to a numerical interval (i.e., a numerical range), unless otherwise specified, the distribution of the optional numerical values ​​in the numerical interval is considered to be continuous, and includes the two numerical endpoints (i.e., the minimum and maximum values) of the numerical interval, and each numerical value between the two numerical endpoints. Unless otherwise specified, when the numerical interval only refers to an integer in the numerical interval, it includes the two endpoint integers of the numerical range, and each integer between the two endpoints, which is equivalent to directly listing each integer. When multiple numerical ranges are provided to describe features or characteristics, these numerical ranges can be combined. In other words, unless otherwise specified, the numerical range disclosed in the present application should be understood to include any and all sub-ranges included therein. The "numerical value" in the numerical interval can be any quantitative value, such as a number, a percentage, a ratio, etc. "Numerical interval" allows for a broad range of quantitative intervals such as percentage intervals, ratio intervals, and ratio intervals.

[0037] Unless otherwise defined, all technical and scientific terms used herein have the same meaning as those commonly understood by those skilled in the art to which the present invention belongs. The terms used herein in the specification of the present invention are only for the purpose of describing specific embodiments and are not intended to limit the present invention. The term "and / or" used herein includes any and all combinations of one or more of the related listed items.

[0038] The embodiment of the present application provides a high-efficiency release roller to solve at least one of the following problems of the high-efficiency release roller obtained by spraying a coating on the surface of a metal shaft in the existing prior art: (1) The high-efficiency release roller obtained by spraying a coating on the surface of the metal shaft is heavy, which will increase the weight of the label printer; (2) The high-efficiency release roller sprayed on the surface of the metal shaft has the problem that the small font on the label paper is not clear; (3) The high-efficiency release roller sprayed on the surface of the metal shaft requires a special high-temperature oven when preparing, which consumes too much energy. The high-efficiency release roller will be described below in conjunction with the accompanying drawings.

[0039] The high-efficiency release roller 10 provided in the embodiment of the present application is exemplary, see Figure 1 As shown, Figure 1 The schematic diagram of the structure of the high-efficiency release roller 10 provided in the embodiment of the present application. The high-efficiency release roller 10 of the present application can be used for label printers. In order to more clearly illustrate the structure of the high-efficiency release roller 10, the high-efficiency release roller 10 will be introduced in conjunction with the accompanying drawings.

[0040] Exemplarily, a method for preparing a high-efficiency release roller comprises the following steps:

[0041] Obtain the shaft core body 100 and set it aside.

[0042] An adhesive is coated on the outer surface of the shaft core body 100 to form a connection layer for connecting the outer surface of the shaft core body 100 and the protective cover 300 .

[0043] The shaft core body 100 coated with adhesive is placed in an injection mold, and liquid material is injected into the injection mold, and heated to form the protective cover 300 sleeved on the shaft core body 100 .

[0044] Furthermore, a coating is applied on the outer surface of the protective cover 300 , and a coating layer 400 is obtained after a curing treatment.

[0045] The above-mentioned high-efficiency release roller 10, the high-efficiency release roller 10 produced by the preparation method of the present application is mainly used on the driving component of a small-sized linerless label printer, and can be used for linerless label printing, thereby improving the printing effect and reducing energy consumption during the production process.

[0046] In some embodiments, the liquid material includes liquid silicone, and correspondingly, the elastic protective cover 300 is a silicone cover.

[0047] In some of the embodiments, the preparation method of the high-efficiency release roller 10 also includes the following steps: after obtaining the shaft core body 100, the part of the shaft core body 100 that needs to be coated with adhesive is polished to remove the anti-rust coating and increase the friction between the shaft core body 100 and the protective cover 300.

[0048] In some of the embodiments, the adhesive includes one or more reactive adhesives.

[0049] In some embodiments, the reactive adhesive includes one or more of epoxy, polyurethane, silicone, acrylic, and anaerobic adhesives.

[0050] In some of the embodiments, the adhesive is selected as dowDY39-051A / B model, purchased from Dow Chemical-China Co., Ltd.

[0051] In some embodiments, the inner wall of the injection mold has a plurality of lines, the depth of the lines is 0.01 mm to 0.1 mm, and adjacent lines are not connected. The depth of the lines includes but is not limited to: 0.01 mm, 0.02 mm, 0.05 mm, 0.06 mm, 0.07 mm, 0.08 mm, 0.1 mm, or a range between any two of the foregoing.

[0052] In some embodiments, the texture of the inner wall of the injection mold is prepared by EDM discharge etching process. EDM (Electrical Discharge Machining) discharge etching process is a precision machining method that uses the spark erosion effect to remove materials. It is mainly used on hard or complex-shaped conductive materials that are difficult to process by traditional machining methods, such as mold manufacturing, aviation parts, electronic components, etc.

[0053] Working principle of EDM discharge etching process: EDM process is based on the principle of electric spark discharge, that is, a certain voltage is applied between the workpiece and the tool electrode, and it is immersed in an insulating working fluid. When the tool electrode approaches the workpiece to a certain distance, due to the large enough electric field strength, the working fluid is broken down to form an instantaneous high-temperature and high-pressure spark channel. The local high temperature generated by the spark channel is sufficient to melt or vaporize the material on the surface of the workpiece. As the spark goes out, the molten material is carried away by the working fluid, thereby achieving material removal.

[0054] In this application, the process features of the EDM discharge etching process are as follows: (1) High precision: It can realize very complex geometric shapes, with the smallest size reaching micron level. (2) No cutting force: There is no direct mechanical contact during the processing, so no mechanical stress deformation will be caused to the workpiece. (3) Suitable for hard materials: It can process materials with very high hardness or very brittle materials, such as cemented carbide, hardened steel, titanium alloy, etc. (4) Small heat-affected zone: Although there is a thermal process involved, the heat-affected zone can be minimized by controlling the parameters. (5) High degree of automation: Modern EDM equipment is usually equipped with advanced control systems to achieve a highly automated processing process.

[0055] In some embodiments, during heat forming, the heating temperature is 140°C to 150°C, and the heating time is 10min to 15min. During heat forming, the heating temperature includes but is not limited to: 140°C, 145°C, 150°C, or a range between any two of the foregoing. During heat forming, the heating time includes but is not limited to: 10min, 13min, 15min, or a range between any two of the foregoing.

[0056] In some embodiments, the preparation method of the high-efficiency release roller 10 further includes the following steps: after heating and molding, the protective sleeve 300 sleeved on the shaft core body 100 is cut and subjected to secondary heating treatment, and the heating temperature during the secondary heating treatment is 180°C~200°C, and the heating time is 60min~80min. During the secondary heating treatment, the value of the heating temperature includes but is not limited to: 180°C, 190°C, 200°C or a range between any two of the foregoing. During the secondary heating treatment, the value of the heating time includes but is not limited to: 60min, 70min, 80min or a range between any two of the foregoing.

[0057] In some of these embodiments, the coating includes a silicone oil compound, a diluent, and a catalyst, wherein the mass ratio of the silicone oil, the diluent, and the catalyst is (100 - 120):(400 - 600):(1 - 5). For example, the mass ratio of methyl silicone oil, the diluent, and the catalyst is 100:400:1. Another example, the mass ratio of the silicone oil, the diluent, and the catalyst is 120:600:5. Another example, the mass ratio of the silicone oil, the diluent, and the catalyst is 110:500:3. In this application, a non-stick coating with a low-temperature catalyst is selected for spraying to form a coating layer 400, which further improves the non-stick property of the high-efficiency release roller 10 and enhances the printing effect of the high-efficiency release roller 10. The production process of the non-stick coating can adopt a normal-temperature process, reducing the energy consumption in the production process of the high-efficiency release roller 10.

[0058] In some of these embodiments, the diluent includes one or several of white gasoline and n-heptane.

[0059] In some of these embodiments, the thickness of the coating layer 400 is 4μm - 10μm. During the secondary heat treatment, the values of the thickness of the coating layer 400 include but are not limited to: 4μm, 5μm, 6μm, 7μm, 8μm, 10μm, or the range between any two of the foregoing.

[0060] In some of these embodiments, the curing treatment includes the following steps: curing the sprayed product at a temperature of 150°C - 180°C for 0.5h - 1h. For example, during the curing treatment, the sprayed product is placed in an oven and cured at a temperature of 150°C for 1h. Another example, during the curing treatment, the sprayed product is placed in an oven and cured at a temperature of 180°C for 0.5h.

[0061] In some of these embodiments, the curing treatment cures the sprayed product by placing it in an oven.

[0062] An embodiment of this application also provides a high-efficiency release roller 10.

[0063] A high-efficiency release roller 10 is prepared by using the above preparation method.

[0064] In some of these embodiments, the high-efficiency release roller 10 includes a core body 100, a connection layer 200, an elastic protective sleeve 300, and a coating layer 400. The core body 100 and the protective sleeve 300 are connected through the connection layer 200, and the coating layer 400 is formed on the outer surface of the elastic protective sleeve 300.

[0065] In some of these embodiments, the protective sleeve 300 has elasticity. The protective sleeve 300 having elasticity can solve the problem of unclear small fonts.

[0066] In some embodiments, the protective cover 300 is a silicone cover. The silicone cover made of a silicone substrate can reduce the weight of the protective cover 300 and the overall weight of the high-efficiency release roller 10.

[0067] In some embodiments, the outer surface of the protective cover 300 has textures. The protective cover 300 has special textures on the outer surface of the mold by special processing of the inner surface of the mold, so as to reduce the contact area between the protective cover 300 and the coating layer 400 and the paper, thereby reducing or avoiding the risk of paper sticking.

[0068] In some embodiments, the outer surface of the protective cover 300 has a plurality of textures.

[0069] In some embodiments, the lines on the outer surface of the protective cover 300 are not connected. It should be noted that the lines on the outer surface are not connected, which means that the lines extend in independent directions, and the extension can be a straight line or a curve. Adjacent lines are independent of each other and do not interfere with each other.

[0070] In some embodiments, the texture on the outer surface of the protective cover 300 may be a long strip-shaped groove extending along the length direction of the protective cover 300 .

[0071] In some embodiments, the depth of the lines is 0.01 mm to 0.1 mm. The depth of the lines can be 0.01 mm, 0.02 mm, 0.05 mm, 0.06 mm, 0.07 mm, 0.08 mm, 0.1 mm or other values ​​and ranges between any two of the above values.

[0072] In some embodiments, the thickness of the connection layer 200 is 0.01 mm to 0.1 mm. The thickness of the connection layer 200 may be 0.01 mm, 0.03 mm, 0.05 mm, 0.07 mm, 0.1 mm or other values ​​and ranges between any two of the above values.

[0073] In some embodiments, the thickness of the protective cover 300 is 0.1 mm to 1 mm. The thickness of the protective cover 300 can be 0.1 mm, 0.3 mm, 0.5 mm, 0.7 mm, 1 mm or other values ​​and a range between any two of the above values.

[0074] In some embodiments, the coating layer 400 has a thickness of 4 μm to 10 μm. The thickness of the coating layer 400 may be 4 μm, 5 μm, 6 μm, 7 μm, 8 μm, 9 μm, 10 μm or other values ​​and a range between any two of the above values.

[0075] In some embodiments, the shaft core body 100 may be a metal shaft. It should be noted that the shaft core body 100 is generally a columnar structure, and the protective sleeve 300 is generally a circular ring structure. The protective sleeve 300 is sleeved on the shaft core body 100. In terms of size, the sum of the outer diameter of the shaft core body 100 and the outer diameter of the connecting layer 200 is equal to the inner diameter of the protective sleeve 300.

[0076] In some of the embodiments, the outer diameter and length of the shaft core body 100 can be set according to actual needs to match the corresponding printer body.

[0077] An embodiment of the present application also provides a label printer.

[0078] A label printer comprises a printer body and the above-mentioned high-efficiency release roller 10.

[0079] Example 1

[0080] This embodiment provides a high-efficiency release roller 10 .

[0081] The high-efficiency release roller 10 comprises a shaft core body 100, a connecting layer 200, an elastic protective cover 300 and a coating layer 400. The shaft core body 100 and the protective cover 300 are connected by the connecting layer 200, and the coating layer 400 is formed on the outer surface of the protective cover 300. The outer surface of the protective cover 300 has textures.

[0082] The high-efficiency release roller 10 of this embodiment is prepared by the following preparation method.

[0083] A method for preparing a high-efficiency release roller comprises the following steps:

[0084] (1) Obtain the shaft core body 100 and grind the portion of the shaft core body 100 where the adhesive needs to be coated to remove the anti-rust coating and improve the friction between the shaft core body 100 and the protective sleeve 300.

[0085] (2) A reactive adhesive (dow DY39-051A / B) is coated on the outer surface of the shaft core body 100 to form a connecting layer 200 . The thickness of the connecting layer 200 is 0.1 mm.

[0086] (3) Assemble the injection mold. The inner wall of the injection mold is prepared with a number of lines using the EDM discharge etching process. The depth of the lines is 0.07 mm, and adjacent lines are not connected. Place the shaft core body 100 coated with adhesive in the injection mold, inject liquid silicone into the injection mold, and heat it at a temperature of 140°C for 15 minutes to form a silicone protective cover 300 with a certain elasticity after the liquid silicone is cured. The injection mold can be reused after cleaning. It should be noted that the connecting layer 200 is in a non-cured state when heated, and when cooled, it can achieve the connection between the outer surface of the shaft core body 100 and the protective cover 300.

[0087] (4) The protective cover 300 sleeved on the shaft core body 100 is cut and subjected to secondary heating treatment at a temperature of 180° C. for 80 min to obtain the protective cover 300 sleeved on the shaft core body 100 . The thickness of the protective cover 300 is 1 mm.

[0088] (5) Prepare a coating, wherein the mass ratio of silicone oil, diluent white spirit and catalyst is 100:400:1.

[0089] (6) A coating is applied on the outer surface of the protective cover 300, and the sprayed product is placed in an oven at 150° C. for curing for 1 hour. After the curing treatment, a coating layer 400 with a thickness of 4 μm is obtained.

[0090] Example 2

[0091] This embodiment provides a high-efficiency release roller 10 .

[0092] The high-efficiency release roller 10 comprises a shaft core body 100, a connecting layer 200, an elastic protective cover 300 and a coating layer 400. The shaft core body 100 and the protective cover 300 are connected by the connecting layer 200, and the coating layer 400 is formed on the outer surface of the protective cover 300. The outer surface of the protective cover 300 has textures.

[0093] The high-efficiency release roller 10 of this embodiment is prepared by the following preparation method.

[0094] A method for preparing a high-efficiency release roller comprises the following steps:

[0095] (1) Obtain the shaft core body 100 and grind the portion of the shaft core body 100 where the adhesive needs to be coated to remove the anti-rust coating and improve the friction between the shaft core body 100 and the protective sleeve 300.

[0096] (2) A reactive adhesive (dow DY39-051A / B) was applied to the outer surface of the shaft core body 100 to form a connecting layer 200 . The thickness of the connecting layer 200 was 0.1 mm.

[0097] (3) Assemble the injection mold. The inner wall of the injection mold is prepared with a plurality of lines by EDM discharge etching process. The depth of the lines is 0.05 mm, and the adjacent lines are not connected. The shaft core body 100 coated with adhesive is placed in the injection mold, and liquid silicone is injected into the injection mold. The mold is heated and formed at a temperature of 140°C for 15 minutes. After the liquid silicone is cured, a silicone protective cover 300 with a certain elasticity is formed. The injection mold can be reused after cleaning.

[0098] (4) The protective cover 300 sleeved on the shaft core body 100 is cut and subjected to a secondary heating treatment at a temperature of 180° C. for 80 min to obtain the protective cover 300 sleeved on the shaft core body 100 . The thickness of the protective cover 300 is 10 mm.

[0099] (5) A coating is prepared, wherein the mass ratio of silicone oil, diluent and catalyst is 120:600:5.

[0100] (6) A coating is applied on the outer surface of the protective cover 300, and the sprayed product is placed in an oven at 180°C for curing for 0.5 h. After the curing treatment, a coating layer 400 with a thickness of 10 μm is obtained.

[0101] Comparative Example 1

[0102] This comparative example provides a high-efficiency release roller.

[0103] The high-efficiency release roller of this comparative example is substantially the same as that of Example 1, except that the coating layer is not included in this comparative example.

[0104] The high-efficiency release roller comprises a shaft core body, a connecting layer and an elastic protective sleeve, wherein the shaft core body and the protective sleeve are connected by the connecting layer. The outer surface of the protective sleeve has textures.

[0105] The high-efficiency release roller of this comparative example is prepared by a method substantially the same as that of Example 1, except that this comparative example does not contain steps (5) and (6).

[0106] In Comparative Example 1, there is no coating layer, resulting in insufficient release properties on the surface of the protective cover, and paper sticking problems may occur during use.

[0107] Comparative Example 2

[0108] This comparative example provides a high-efficiency release roller.

[0109] The high-efficiency release roller of this comparative example is substantially the same as that of Example 2, except that this comparative example does not contain a connecting layer.

[0110] The high-efficiency release roller comprises a shaft core body, an elastic protective sleeve and a coating layer, wherein the coating layer is formed on the outer surface of the protective sleeve. The outer surface of the protective sleeve has textures.

[0111] The high-efficiency release roller of this comparative example is prepared by using a method substantially the same as that of Example 1, except that this comparative example does not contain step (2).

[0112] In Comparative Example 2, no adhesive is contained, resulting in the protective sleeve and the shaft core falling off during the use of the finished product and making it unusable.

[0113] Comparative Example 3

[0114] This comparative example provides a high-efficiency release roller.

[0115] The high-efficiency release roller of this comparative example is substantially the same as that of Example 2, except that, in this comparative example, the injection mold does not contain any texture.

[0116] The high-efficiency release roller comprises an axis core body, a connecting layer, an elastic protective sleeve and a coating layer. The axis core body and the protective sleeve are connected by the connecting layer, and the coating layer is formed on the outer surface of the protective sleeve.

[0117] The high-efficiency release roller of this comparative example is prepared by using a preparation method substantially the same as that of Example 2, except that in this comparative example, the inner wall of the injection mold in step (3) does not contain any texture.

[0118] In comparative example 3, the inner wall of the injection mold in step (3) does not contain any texture, so that the outer surface of the protective cover does not have any texture, resulting in an excessively large coefficient of friction on the surface of the protective cover, causing paper sticking.

[0119] Comparative Example 4

[0120] This comparative example provides a high-efficiency release roller.

[0121] The high-efficiency release roller of this comparative example is basically the same as that of Example 2, except that in this comparative example, in the coating of step (5), the mass ratio of methyl silicone oil, diluent white spirit and catalyst is 50:600:5.

[0122] The high-efficiency release roller comprises an axis core body, a connecting layer, an elastic protective sleeve and a coating layer. The axis core body and the protective sleeve are connected by the connecting layer, and the coating layer is formed on the outer surface of the protective sleeve.

[0123] The high-efficiency release roller of this comparative example is prepared by a preparation method substantially the same as that of Example 2, except that in this comparative example, in the coating of step (5), the mass ratio of methyl silicone oil, diluent white spirit and catalyst is 50:600:5.

[0124] In Comparative Example 4, the silicone oil content is too low, resulting in a shortened service life of the coating layer.

[0125] Comparative Example 5

[0126] This comparative example provides an efficient release roller.

[0127] The efficient release roller of this comparative example is basically the same as that of Example 2, except that in this comparative example, in the coating in step (5), the mass ratio of methyl silicone oil, diluent and catalyst is 120:600:0.3.

[0128] The efficient release roller includes a core body, a connection layer, an elastic protective sleeve and a coating layer. The core body and the protective sleeve are connected through the connection layer, and the coating layer is formed on the outer surface of the protective sleeve.

[0129] The efficient release roller of this comparative example is prepared by the same preparation method as that of Example 2, except that in this comparative example, in the coating in step (5), the mass ratio of silicone oil, diluent and catalyst is 120:600:0.3.

[0130] In Comparative Example 5, the content of the catalyst is too small, resulting in an extended vulcanization time.

[0131] Perform performance tests on the efficient release rollers 10 in Example 1, Example 2 and Comparative Examples 1 to 5. The test results are shown in Table 1.

[0132] Table 1

[0133]

[0134] In summary, for the efficient release roller 10 of the present application, by selecting a silica gel substrate, the weight of the efficient release roller 10 can be reduced and the problem of unclear small characters caused by lack of elasticity can be avoided. Through the special treatment of the inner surface of the molding die to form patterns, special patterns are formed on the surface of the efficient release roller 10 product, and the contact area is reduced, which can reduce or avoid the risk of paper sticking; selecting a non-stick coating for low-temperature molding can choose ordinary heating equipment in production, reduce energy consumption during production, and reduce production costs.

[0135] In the above embodiments, the descriptions of each embodiment have their own emphases. For the parts not detailed in a certain embodiment, reference can be made to the relevant descriptions of other embodiments.

[0136] The technical features of the above-described embodiments can be combined arbitrarily. For the sake of brevity of description, not all possible combinations of the technical features in the above embodiments are described. However, as long as there is no contradiction in the combination of these technical features, it should be considered as the scope recorded in this specification.

[0137] The above-described embodiments merely represent several implementation manners of the present invention. The description thereof is relatively specific and detailed, but it should not be construed as a limitation to the scope of the patent for the present invention. It should be noted that for those of ordinary skill in the art, without departing from the concept of the present invention, several modifications and improvements can still be made, and these all fall within the protection scope of the present invention. Therefore, the protection scope of the patent for the present invention shall be subject to the appended claims.

Claims

1. A method for preparing a high-efficiency release roller, characterized in that: The steps include: Get the shaft core body and set it aside; Applying adhesive on the outer surface of the shaft core body to form a connecting layer; Placing the shaft core body coated with adhesive in an injection mold, injecting liquid material into the injection mold, and heating and molding to obtain a protective sleeve sleeved on the shaft core body; And, coating is applied on the outer surface of the protective sleeve, and a coating layer is obtained after curing.

2. The method for preparing a high-efficiency release roller according to claim 1, characterized in that: The method for preparing the high-efficiency release roller also includes the following steps: after obtaining the shaft core body, grinding the portion of the shaft core body that needs to be coated with adhesive to remove the anti-rust coating and increase the friction between the shaft core body and the protective sleeve.

3. The method for preparing a high-efficiency release roller according to claim 1, characterized in that: The adhesive includes one or more reactive adhesives.

4. The method for preparing a high-efficiency release roller according to claim 1, characterized in that: The inner wall of the injection mold has a plurality of lines, the depth of the lines is 0.01 mm to 0.1 mm, and adjacent lines are not connected.

5. The method for preparing a high-efficiency release roller according to any one of claims 1 to 4, characterized in that: During the heating molding, the heating temperature is 140° C. to 150° C., and the heating time is 10 min to 15 min.

6. The method for preparing a high-efficiency release roller according to any one of claims 1 to 4, characterized in that: The preparation method of the high-efficiency release roller also includes the following steps: after heating and molding, cutting the protective sleeve sleeved on the shaft core body, and performing a secondary heating treatment, the heating temperature during the secondary heating treatment is 180°C~200°C, and the heating time is 60min~80min.

7. The method for preparing a high-efficiency release roller according to any one of claims 1 to 4, characterized in that: The coating comprises methyl silicone oil, a diluent and a catalyst, wherein the mass ratio of the methyl silicone oil, the diluent and the catalyst is (100-120): (400-600): (1-5).

8. The method for preparing a high-efficiency release roller according to any one of claims 1 to 4, characterized in that: The coating layer has a thickness of 4 μm to 10 μm; And / or, the curing treatment comprises the following steps: curing the sprayed product at a temperature of 150° C. to 180° C. for 0.5 h to 1 h.

9. A high-efficiency release roller, characterized in that: The method is prepared according to any one of claims 1 to 8.

10. A label printer, characterized in that: The invention comprises a printer body and the high-efficiency release roller as claimed in claim 9.

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