Sketch erasing pen as well as preparation method and application thereof

Abstract

The invention relates to the technical field of painting tools, and discloses a sketch erasing pen and a preparation method and application thereof, and the sketch erasing pen comprises an erasing head and a pen connector. The sketch erasing pen has flexibility and an extension function, the problems of a traditional erasing pen are solved, more possibilities and convenience are brought in the sketch drawing process, and the drawing efficiency and the quality of works are remarkably improved. In addition, the wiping head has extremely high durability, which is mainly attributed to the application of materials such as a polyurethane base material and SEBS, and the materials enable the wiping head to be more wear-resistant, so that the service life of the wiping head is effectively prolonged.

Description

Technical Field

[0001] The invention relates to the technical field of painting tools, in particular to a sketch erasing pen and a preparation method and application thereof. Background Art

[0002] Sketch erasing pens are one of the commonly used tools in painting. They are mainly used to adjust and modify sketch works, and to achieve the desired artistic effect by erasing or blurring lines. Traditional erasing pens are mostly made of materials such as paper, cloth or leather, but these materials often have problems such as easy wear, difficulty in controlling the strength, and single wiping effect during use. Therefore, an improved sketch erasing pen is needed, which can provide more diverse and precise wiping effects, and has better durability and ease of use.

[0003] At the same time, the design of traditional rubbing pens is mostly not capable of combining with charcoal pencils, which leads to inconvenience in use, insufficient detail processing, low efficiency, and failure to meet the high requirements of sketch painting. Therefore, it is imperative to improve the traditional rubbing pens. Summary of the invention

[0004] In view of this, the present invention proposes a sketch erasing pen and a preparation method and application thereof, aiming to provide a new sketch erasing pen, which can not only provide diversified and precise erasing effects but also has better durability and ease of use.

[0005] The present invention provides a method for preparing an erasing head for a sketch erasing pen, comprising: After the polyurethane base material and SEBS are evenly mixed, alumina powder, montmorillonite, wollastonite powder and titanium dioxide are added and stirred evenly, and then AC foaming agent and cross-linking agent are added and stirred evenly to obtain a mixture; After removing bubbles from the mixture, the mixture is placed in a mold for foaming and curing; After the foaming and curing are completed, the mixture is cooled to room temperature to obtain the eraser head for the sketch eraser.

[0006] Preferably, the preparation method of the SEBS comprises: The styrene-butadiene-styrene block copolymer and the solvent are mixed and stirred to dissolve to obtain a uniform solution; a nickel catalyst is added to the uniform solution, and hydrogen is introduced after vacuuming, and stirred to react at 100±3° C.; after the reaction is completed, the catalyst and the solution are removed to obtain the SEBS.

[0007] Preferably, the AC foaming agent is azodicarbonamide; And / or, the cross-linking agent is isocyanate.

[0008] Preferably, the temperature at which the mixture is placed in the mold for foaming and curing is 80±5° C., and the curing time is at least 1 hour.

[0009] The present invention also provides an erasing head for a sketch erasing pen, and the erasing head for a sketch erasing pen is prepared by the above-mentioned preparation method.

[0010] The present invention also proposes an application of the above-mentioned eraser head for sketch eraser, and the application includes at least any one of the following: A1) Application of the eraser head for sketch erasing pen in erasing sketches; A2) Application of the sketch eraser head to erase pencil or charcoal marks; A3) Application of the eraser head for sketching in sketch drawing; A4) Application of the erasing head for sketch erasing pens in the preparation of rubbing and erasing products.

[0011] Preferably, the rubbing product is a sketch erasing pen.

[0012] It is understandable that the existing traditional erasable pens have the following disadvantages: Poor flexibility: Traditional erasable pens are usually integrated and cannot be directly combined with charcoal pencils. They need to be held separately when used, which increases the number of steps in the painting process and reduces convenience.

[0013] Lack of extension function: Traditional erasers cannot be connected to charcoal pencils or pencils. When the charcoal pencil becomes shorter, it becomes inconvenient to hold it, especially when dealing with details, it is difficult to grasp the accuracy.

[0014] Limited ability to process details: Most traditional erasers have wide heads, making it difficult to achieve the effect of wiping fine brushstrokes. They are not suitable for fine depiction or shaping of layers in sketches, which affects the delicacy of the picture.

[0015] Time-consuming and laborious: Traditional erasers are inconvenient to use and require frequent switching between charcoal pencils and erasers, which increases the drawing time. It is impossible to achieve an integrated design and lacks sufficient control, which affects the drawing efficiency.

[0016] The shaping effect is average: the wiping effect of the traditional rubbing pen may not be uniform enough, and the roughness and softness cannot be balanced, making it difficult to shape the layering and delicacy of the picture.

[0017] In view of this, the present invention also proposes a sketch erasing pen, which comprises a pen receiving device and the above-mentioned sketch erasing pen erasing head; The sketch eraser head is used to erase pencil or charcoal marks; The eraser is connected to one end of the pen holder; A connecting hole is provided at one end of the pen connector away from the erasing head, and the connecting hole is used to connect with a sketching tool.

[0018] Preferably, the wiping head is in the shape of a spindle.

[0019] Preferably, the eraser head is fixedly connected or detachably connected to one end of the pen receiver.

[0020] Compared with the prior art, the present invention has the following beneficial effects: The product of the present invention provides a variety of precise wiping effects, meeting various needs in sketching, including blurring, rubbing and detail processing; its durability is significantly improved, thanks to the use of materials such as polyurethane base material and SEBS, the rubbing head is not easy to wear, thereby extending the service life; ease of use is also enhanced, the rubbing head is designed to be spindle-shaped, which is easy to operate, and the detachable design allows the replacement of worn rubbing heads, further improving the use efficiency; through the design of the pen holder, integration with sketching tools (such as charcoal pencils) is achieved, the operating steps in the painting process are simplified, and the convenience and efficiency of painting are improved; the optimized preparation method gives the rubbing head a better balance of softness and roughness, which helps to better shape the layering and delicacy of the picture; the sketch erasing pen of the present invention has a lengthening function, even if the charcoal pencil is shortened, it can continue to be used through the pen holder, maintaining the accuracy and convenience of operation; in addition, the sketch erasing pen of the present invention can also be used to prepare rubbing products, such as sketch erasing pens, further expanding the types and application range of painting tools.

[0021] In summary, the sketch erasing pen and its preparation method and application of the present invention not only solve the problems existing in traditional erasing pens, but also provide more possibilities and conveniences in sketch painting, and significantly improve painting efficiency and work quality. BRIEF DESCRIPTION OF THE DRAWINGS

[0022] Various other advantages and benefits will become apparent to those of ordinary skill in the art by reading the detailed description of the preferred embodiments below. The accompanying drawings are only for the purpose of illustrating the preferred embodiments and are not to be considered as limiting the present invention. Moreover, the same reference symbols are used throughout the accompanying drawings to represent the same components. In the accompanying drawings: Figure 1 This is one of the finished pictures of the sketch eraser of the present invention; Figure 2 The second finished product diagram of the sketch eraser of the present invention. DETAILED DESCRIPTION

[0023] Exemplary embodiments of the present disclosure will be described in more detail below with reference to the accompanying drawings. Although exemplary embodiments of the present disclosure are shown in the accompanying drawings, it should be understood that the present disclosure can be implemented in various forms and should not be limited by the embodiments described herein. On the contrary, these embodiments are provided in order to enable a more thorough understanding of the present disclosure and to fully convey the scope of the present disclosure to those skilled in the art. It should be noted that, in the absence of conflict, the embodiments of the present invention and the features described in the embodiments can be combined with each other. The present invention will be described in detail below with reference to the accompanying drawings and in combination with the embodiments.

[0024] Embodiment 1 Preparation of the Eraser Head for Sketch Eraser 1. Materials 1. Base material: Polyurethane (milky white foam matrix, providing softness).

[0025] 2. Elasticity enhancer: low hardness thermoplastic elastomer (SEBS, styrene-ethylene-butylene-styrene block copolymer), providing certain elasticity and durability. The preparation method of styrene-ethylene-butylene-styrene block copolymer includes: mixing styrene-butadiene-styrene block copolymer (SBS) copolymer and solvent (cyclohexane) in a ratio of 1:10, adding the mixture to a high-pressure reactor, stirring and dissolving, so that the SBS copolymer is completely dissolved in the solvent to form a uniform solution. Add Ni catalyst at a ratio of 0.5% of the mass of SBS, close the reactor, and evacuate it to remove the residual air in the reactor, and slowly introduce high-purity hydrogen to reach the pressure required for the reaction (3MPa). Heat the reactor and control the temperature at 100±3℃. Start the stirring device and maintain the stirring rate at 200rpm to ensure that the reaction proceeds uniformly. After the hydrogenation reaction is completed, stop heating and stirring, filter the product solution through a filtering device to remove the catalyst. The filtered solution is placed in a vacuum distillation device, and the solvent is recovered by vacuum evaporation. After the solvent is evaporated, solid SEBS can be obtained.

[0026] 3. Matte particles: Silica powder (particle size about 10-50 microns), providing a rough feeling.

[0027] 4. Special additives: Montmorillonite: Increases adsorption and helps erase pencil marks.

[0028] Wollastonite powder: enhances wear resistance.

[0029] Titanium Dioxide: White pigment that enhances the opalescent color.

[0030] 5. Foaming agent: AC foaming agent (azodicarbonamide) helps the material form a porous structure and increase softness.

[0031] 6. Cross-linking agent: isocyanate, which improves material strength and durability.

[0032] 2. Preparation Equipment 1. Mixer: used to mix raw materials evenly.

[0033] 2. Mould: used for forming.

[0034] 3. Vacuum degassing device: removes bubbles generated during the mixing process.

[0035] 4. Curing oven: control the temperature for curing.

[0036] 3. Specific preparation process Step 1: Ingredients Weigh each component according to the following weight ratio: Polyurethane base material: 60 parts; SEBS elastomer: 10 parts; Alumina powder: 5 parts; Montmorillonite: 5 parts; Wollastonite powder: 5 parts; Titanium dioxide: 2 parts; AC foaming agent: 2 parts; Cross-linking agent: 1 part.

[0037] Step 2: Mix 1. Mix the polyurethane base material and SEBS elastomer in a mixer, set the stirring speed to 500 rpm, and control the temperature at 50±3℃ to fully mix the base materials.

[0038] 2. Gradually add alumina powder, montmorillonite, wollastonite powder and titanium dioxide and continue stirring for 5 minutes to ensure that the solid powder is evenly distributed.

[0039] 3. Finally, add AC foaming agent and cross-linking agent and stir for 2 minutes.

[0040] Step 3: Vacuum degassing The mixture was transferred to a vacuum degasser and evacuated to -0.1 MPa for 5 min to remove bubbles.

[0041] Step 4: Mold Forming 1. Pour the degassed mixture into the prepared mold and gently shake the mold to further degas.

[0042] 2. Place the mold in a curing oven for foaming and curing.

[0043] Step 5: Foaming and curing 1. Set the curing oven temperature to 80°C and the curing time to 1 hour.

[0044] 2. During the curing process, the AC foaming agent will decompose, generate gas and foam the material to form a porous structure. At the same time, the cross-linking agent acts on the material to form a slightly rough structure on its surface.

[0045] Step 6: Cooling and demoulding 1. Take out the mold and cool to room temperature.

[0046] 2. Remove the wiper from the mold and trim the edges to the desired shape.

[0047] 4. Features and Effects Softness: Provided by polyurethane and SEBS, the wipe head is soft and elastic.

[0048] Rough feel: Aluminum oxide micro powder provides a matte feel that helps to effectively erase pencil or charcoal marks.

[0049] Adsorption: The addition of montmorillonite enhances the adsorption of the mop surface, which helps to remove fine particles.

[0050] Wear resistance: Wollastonite powder enhances the wear resistance of the material and prolongs the service life of the wiper head.

[0051] Milky white appearance: The addition of titanium dioxide makes the material appear uniform milky white, which has a good visual effect.

[0052] The eraser head obtained by this process not only has a soft feel, but also has appropriate roughness and adsorption capacity, making it suitable for high-quality sketch drawing.

[0053] Test Example 1 The performance of the wiper prepared in Example 1 was tested.

[0054] 1. Test process 1. Hardness test Purpose: To test the hardness of the eraser tip to ensure it is suitable for use on paper and not too hard or too soft.

[0055] Experimental method: Use Shore A hardness tester to test the hardness of the eraser head. Test 5 times at different positions of the eraser head and take the average value as the hardness value.

[0056] Experimental steps: Place the rubbing head sample on the hardness tester test platform and ensure it is stable. Press the hardness tester vertically on the rubbing head surface and record the reading. Repeat the test at different positions and take the average value.

[0057] 2. Wear resistance test Purpose: To evaluate the wear resistance of the wiper head and ensure that it is not easily worn during use.

[0058] Experimental method: Wear resistance test was performed using a friction tester.

[0059] The rubbing motion is simulated on the paper surface, and the wear is measured at a certain load and reciprocating number.

[0060] Experimental steps: Install the rubbing head on the friction tester. Set the load to 1N and the number of reciprocating motions to 1000 times. After the test, weigh the mass loss of the rubbing head and calculate the wear rate.

[0061] 3. Adsorption test Purpose: To evaluate the ability of eraser tips to absorb pencil or charcoal particles.

[0062] Experimental method: Draw pencil marks on standard paper, wipe it with an eraser, and measure the percentage of residual particles on the paper after wiping.

[0063] Experimental steps: Use an HB pencil to smear a certain area on a standard paper. Use an eraser to wipe the mark 5 times to ensure uniformity. Use image analysis software (ImageJ) to analyze the wiped paper and measure the proportion of residual particles.

[0064] 4. Roughness test Purpose: To evaluate the roughness of the eraser surface to ensure adequate erasing capability.

[0065] Experimental method: Use a surface roughness meter to measure the Ra (arithmetic mean roughness) value of the wiper surface.

[0066] Experimental steps: Place the surface of the wiper under the roughness meter and measure the surface roughness of 1 cm in length. Measure 3 times at different positions and take the average value as the roughness result.

[0067] 2. Results Table 1 shows the performance test results.

[0068] Table 1 Performance Indicators Test Method Data Results unit Remark hardness Shore Hardness Tester 25 ShoreA Average value (5 times) Wear resistance Friction testing machine 0.005 g Mass loss after 1000 frictions Adsorption Image analysis 5 % Percentage of residual particles Roughness Surface Roughness Tester 50 μm Ra value According to the results in Table 1, the hardness of the eraser head is 25 ShoreA, indicating that it has appropriate softness and is suitable for erasing pencil or charcoal marks on paper without damaging the paper. The abrasion resistance test shows that after 1000 frictions, the mass loss of the eraser head is 0.005 grams, which shows that the eraser head has good wear resistance and can withstand long-term use. The adsorption test result is 5%, indicating that the eraser head has a good adsorption capacity for pencil or charcoal particles and can effectively remove marks. The roughness test result is an Ra value of 50 microns, which shows that the surface of the eraser head has sufficient roughness to provide an effective erasing effect.

[0069] In summary, this eraser performs well in terms of hardness, wear resistance, adsorption and roughness, meeting the needs of high-quality sketching. Its soft texture and good adsorption capacity make it an ideal choice for professional artists and enthusiasts. In addition, the milky white appearance of the eraser also adds to its beauty, making it not only highly functional but also visually appealing during use.

[0070] Example 2

[0071] The pen holder and the eraser head prepared in Example 1 are used to prepare an eraser pen. The prepared finished product is as follows: Figure 1-2 shown.

[0072] The pen holder is cylindrical and has connection holes at both ends. The connection hole at one end of the pen holder is connected to the eraser head, and the connection method can be fixed connection or detachable connection. The connection hole at the other end of the pen holder is used to connect drawing tools (such as pencils, colored pencils, pastels, charcoal pencils, etc.). The shape and size of the eraser head can be adjusted as needed to adapt to different types of drawing tools and erasing needs.

[0073] In the process of preparing the eraser pen, first fix the eraser head in the connection hole at one end of the pen holder. The fixing method can be through bonding, snapping, threading or other mechanical connection methods. Make sure that the eraser head is firmly connected to the pen holder so that it will not fall off easily during use.

[0074] Next, insert the painting tool into the other end of the pen holder. If the diameter of the painting tool matches the connection hole, a tight fit can be achieved; if the diameter does not match, use an appropriate adapter or adjust the size of the pen holder connection hole to ensure that the painting tool can be firmly fixed on the eraser pen.

[0075] Finally, the erasing pen prepared by the above steps can be used for drawing conveniently and can be quickly switched to erasing mode when needed, greatly improving the efficiency of drawing and erasing. The appearance and function of the finished erasing pen can be designed and optimized according to actual needs to meet the usage habits and preferences of different users.

[0076] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of the present invention rather than to limit it. Although the present invention has been described in detail with reference to the above embodiments, ordinary technicians in the relevant field should understand that the specific implementation methods of the present invention can still be modified or replaced by equivalents. Any modification or equivalent replacement that does not depart from the spirit and scope of the present invention should be covered within the scope of protection of the claims of the present invention.

Claims

1. A method for preparing an eraser head for a sketch eraser, characterized in that: include: After the polyurethane base material and SEBS are evenly mixed, alumina powder, montmorillonite, wollastonite powder and titanium dioxide are added and stirred evenly, and then AC foaming agent and cross-linking agent are added and stirred evenly to obtain a mixture; After removing bubbles from the mixture, the mixture is placed in a mold for foaming and curing; After the foaming and curing are completed, the mixture is cooled to room temperature to obtain the eraser head for the sketch eraser.

2. The preparation method according to claim 1, characterized in that: The preparation method of the SEBS comprises: The styrene-butadiene-styrene block copolymer and the solvent are mixed and stirred to dissolve to obtain a uniform solution; a nickel catalyst is added to the uniform solution, and hydrogen is introduced after vacuuming, and stirred to react at 100±3° C.; after the reaction is completed, the catalyst and the solution are removed to obtain the SEBS.

3. The preparation method according to claim 1, characterized in that: The AC foaming agent is azodicarbonamide; And / or, the cross-linking agent is isocyanate.

4. The preparation method according to claim 1, characterized in that: The mixture is placed in a mold for foaming and curing at a temperature of 80±5°C and a curing time of at least 1 hour.

5. A sketch eraser head, characterized in that: The erasing head for sketch erasing pens is prepared by the preparation method described in any one of claims 1 to 4.

6. An application of the eraser head for sketch erasers as claimed in claim 5, characterized in that: The application includes at least one of the following: A1) Application of the eraser head for sketch erasing pen in erasing sketches; A2) Application of the sketch eraser head to erase pencil or charcoal marks; A3) Application of the eraser head for sketching in sketch drawing; A4) Application of the erasing head for sketch erasing pens in the preparation of rubbing and erasing products.

7. The use according to claim 6, characterized in that: The rubbing product is a sketch rubbing pen.

8. A sketch erasing pen, characterized in that: The sketch eraser comprises a pen holder and the sketch eraser head according to claim 5; The sketch eraser head is used to erase pencil or charcoal marks; The eraser is connected to one end of the pen holder; A connecting hole is provided at one end of the pen connector away from the erasing head, and the connecting hole is used to connect with a sketching tool.

9. The sketch erasing pen according to claim 8, characterized in that: The shape of the wiping head is spindle-shaped.

10. The sketch erasing pen according to claim 8, characterized in that: The eraser head is fixedly connected or detachably connected to one end of the pen receiver.

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