Method for realizing soft rubber hand feeling on hard plastic part

Abstract

The invention relates to a method for achieving the soft rubber hand feeling on a hard plastic part, and belongs to the field of plastic processing.The method for achieving the soft rubber hand feeling on the hard plastic part comprises the following steps that S1, the hard plastic part with a micropore structure on the surface is prepared; s2, preparing a flexible glue solution; s3, the surface of the hard plastic part is coated with the prepared soft glue solution, and the soft glue solution permeates into the micropore structure; and S4, the soft glue solution is subjected to curing treatment, and soft glue layers are formed on the surface of the hard plastic part and the hole walls of the micropore structures. According to the method for achieving the soft rubber hand feeling on the hard plastic part, the soft rubber solution is prepared and smeared on the surface of the hard plastic part, the evenly-covered elastic layer is formed after curing, the soft touch feeling is formed on the surface of the hard plastic part, and the stiff defect of traditional hard plastic is remarkably overcome.

Description

Technical Field

[0001] The present invention relates to the field of plastic processing, and particularly to a method for achieving a soft rubber feel on a rigid plastic part. Background Art

[0002] In the traditional plastic part processing field, the surface of rigid plastic parts is smooth, hard, and feels cold, lacking comfort and being difficult to meet the increasing demand of people for the feel of products. Although soft rubber materials feel soft and comfortable, their properties such as strength and wear resistance are poor, and it is difficult to be used alone in products with high strength requirements. However, in traditional plastic processing technologies, the effect of achieving a soft feel on rigid plastic parts is poor, affecting the user experience. Moreover, the soft layer is prone to falling off and the fixing effect is not good. Therefore, further improvement is needed. Summary of the Invention

[0003] Based on this, in view of the problem of poor effect of achieving a soft feel on rigid plastic parts in traditional plastic processing technologies, it is necessary to provide a method for achieving a soft rubber feel on a rigid plastic part.

[0004] A method for achieving a soft rubber feel on a rigid plastic part includes the following steps: S1, preparing a rigid plastic part with a microporous structure on the surface; S2, preparing a soft rubber solution; S3, coating the prepared soft rubber solution on the surface of the rigid plastic part so that the soft rubber solution penetrates into the microporous structure; S4, subjecting the soft rubber solution to a curing treatment to form a soft rubber layer on the surface of the rigid plastic part and the pore walls of the microporous structure.

[0005] The present application discloses a method for achieving a soft rubber feel on a rigid plastic part. By preparing a soft rubber solution and coating it on the surface of the rigid plastic part, an evenly covered elastic layer is formed after curing, so that a soft touch is formed on the surface of the rigid plastic part, significantly improving the rigid defect of traditional rigid plastics. After the soft rubber solution penetrates into the micropores and cures, bumps with the same number as the micropores are formed on the soft rubber layer, and the bumps can cooperate with the micropores, so that the anti - shedding ability of the soft rubber layer is stronger. Moreover, during the curing or molding process, the microscopic or macroscopic structures of the soft rubber solution and the rigid plastic part are combined with each other. By using the intermolecular force of the soft rubber solution and the principle that the soft rubber solution has a stronger anti - shedding ability in the microporous structure, the interfacial bonding force between the soft rubber solution and the rigid plastic part is enhanced, forming a better fixing effect. This design greatly improves the adhesion between the soft rubber layer and the rigid plastic part, overcoming the pain points of easy peeling and falling off of traditional coatings. Moreover, the soft rubber layer can remain stable under complex environments such as long - term friction, temperature and humidity changes, avoiding the touch degradation caused by interface failure and extending the service life of the product.

[0006] In one embodiment, the pore size of the microporous structure is 10 - 100 μm. With the pore size of the microporous structure being 10 - 100 μm, the pore size of the microporous structure is not too small such that the soft glue solution is difficult to be fully infiltrated, resulting in a small interfacial bonding force between the soft glue solution and the rigid plastic part during the curing process, and thus the soft glue layer is not easily peeled off and detached. The pore size of the microporous structure is not too large such that the properties of the rigid plastic part, such as strength and wear resistance, are poor. This balanced design enables the plastic part to achieve a good soft touch while retaining its original rigidity.

[0007] In one embodiment, the porosity of the microporous structure is 20 - 80%. Definition of porosity: Porosity refers to the proportion of the pore volume in the total volume of the material. With the porosity of the microporous structure being 20 - 80%, the moderate porosity provides sufficient space for the infiltration of the soft glue solution. Considering that the pore size of the microporous structure is small and the volume of the material is large, there are numerous micropores, ensuring that the soft glue solution can fully infiltrate the numerous micropores and form a uniformly covered soft glue layer, thereby forming multiple anchoring points between the soft glue layer and the micropores, enhancing the interfacial bonding force between the soft glue solution and the plastic part, and making the soft glue layer not easily fall off. Moreover, it will not lead to too high porosity resulting in loss of substrate strength.

[0008] In one embodiment, the pore size of the microporous structure is 50 μm. The optimal pore size of the microporous structure is 50 μm, which can avoid insufficient infiltration of the soft glue solution due to too small pore size. For example, the soft glue solution only covers the surface of the substrate, and the soft glue layer at the micropores is less likely to be affected by external factors and fall off. The large number of joints between the soft glue layer and the micropores is beneficial to enhancing the anchoring points of the soft glue layer, and can effectively disperse the influence of external factors such as pressure. The stability and reliability of the soft glue layer are better. Moreover, it can also avoid the loss of substrate strength due to too large pore size, such as the thin pore wall being easily broken, ensuring the strength of the rigid plastic part and not affecting the use of the rigid plastic part.

[0009] In one embodiment, the porosity of the microporous structure is 50%. With the porosity of the microporous structure preferably being 50%, it can provide sufficient infiltration space for the soft glue solution, ensure that the solution fully infiltrates the pore wall and forms a continuous coverage, while retaining enough solid structure to maintain the rigidity of the rigid plastic part. This design can form multiple anchoring points between the soft glue layer and the micropores while maintaining the strength of the rigid plastic part. The stability and reliability of the soft glue layer are good. This design greatly enhances the interfacial bonding force between the soft glue solution and the plastic part, thereby improving the adhesion between the soft glue layer and the rigid plastic part, and making the soft glue layer not easily fall off.

[0010] In one embodiment, the specific steps of step S1 are as follows: A micro-scale or nano-scale microporous structure is formed on the surface of the rigid plastic part by one or more of injection molding, mold etching, and laser engraving. Definition of mold etching: Microporous textures are prefabricated on the surface of the mold by chemical or physical means to ensure the consistency of the pore structure of each plastic part in mass production. These three processes of injection molding, mold etching, and laser engraving can be used alone or in combination, which can take into account both mass production efficiency and high-precision requirements, and break through the design limitations of traditional single processes.

[0011] In one embodiment, the specific steps of step S2 are as follows: S21. Heat the thermoplastic elastomer to a molten state to obtain a molten thermoplastic elastomer; S22. Mix the molten thermoplastic elastomer, solvent, and additive according to a mass ratio to prepare a soft glue solution. By heating the thermoplastic elastomer (TPE) to a molten state, the solid thermoplastic elastomer is transformed into a liquid state, which is convenient for making a soft glue solution and is more convenient to coat on the rigid plastic part. The addition of the thermoplastic elastomer and additive can bring a soft glue feel. The solvent has a diluting effect, so the addition of the solvent can dissolve and mix various materials together to prepare a soft glue solution with a certain viscosity and fluidity. The addition of the solvent can significantly improve the fluidity and permeability of the soft glue solution, so that the soft glue solution can smoothly penetrate into the microporous structure to form a stable soft glue layer, improving the soft feel. The soft glue solution prepared by this method has both a soft touch and anti-deformation ability, and is not easy to harden, crack, or deform during long-term use, with strong practicability.

[0012] In one embodiment, the thermoplastic elastomer is one or more of styrenic thermoplastic elastomers, polyurethane thermoplastic elastomers, and polyolefin thermoplastic elastomers. By using one of styrenic thermoplastic elastomers (SBS), polyurethane thermoplastic elastomers (TPU), and polyolefin thermoplastic elastomers (TPO) alone or in combination, a soft glue solution that forms a soft glue layer with a soft touch after curing can be made. By selecting different thermoplastic elastomers, the soft hardness of the finally formed soft glue layer can be adjusted to meet user requirements.

[0013] In one embodiment, the mass ratio of the molten thermoplastic elastomer, the solvent and the additive is 10:80:10. With the mass proportion of the molten thermoplastic elastomer being 10%, it can provide a stable soft rubber feel and avoid the excessive viscosity of the soft rubber solution caused by too high a concentration, which affects the fluidity and permeability of the soft rubber solution. With the mass proportion of the additive being 10%, it can optimize the soft rubber feel of the soft rubber layer. With the mass proportion of the solvent being 80%, it can significantly improve the fluidity of the soft rubber solution, enabling the materials to be fully mixed to form a soft rubber solution. This preferred ratio enables the soft rubber solution to spread evenly on the hard plastic part, thereby forming a soft rubber layer with a uniform soft texture.

[0014] In one embodiment, the thermoplastic elastomer is a styrenic thermoplastic elastomer. By selecting a styrenic thermoplastic elastomer as the soft rubber material, the cured soft rubber layer can have a certain elasticity and a soft touch, effectively eliminating the stiffness of the hard plastic part. Moreover, the styrenic elastomer has excellent fluidity in the molten state and can be fully mixed with the solvent and the additive to form a homogeneous solution, making the soft rubber layer have a uniform soft touch.

[0015] In one embodiment, the solvent is toluene. With toluene as the solvent, toluene has a strong dissolving ability for styrenic thermoplastic elastomers, and can quickly form a stable and homogeneous soft rubber solution with the molten thermoplastic elastomer and the additive, making the soft rubber solution easier to penetrate into the microporous structure. Moreover, toluene has a low cost, which can create better economic benefits.

[0016] In one embodiment, the additive is a plasticizer. By selecting a plasticizer as the additive to form a soft rubber solution, the plasticizer can penetrate between the molecular chains of the thermoplastic elastomer, weaken the intermolecular force, and make the cured soft rubber layer exhibit soft and resilient characteristics, eliminating the rigid touch of the hard plastic. This design applied to components that require frequent contact can significantly improve user comfort.

[0017] In one embodiment, the specific steps of step S3 are as follows: The soft rubber solution is uniformly coated on the surface of the hard plastic part by one or more of spraying, dip coating, brushing and roll coating, and left standing for 10 minutes to allow the soft rubber solution to penetrate into the microporous structure. The separate use or combined use of spraying, dip coating, brushing and roll coating enables the sol solution to be uniformly coated on the hard plastic part, with good flexibility. The 10-minute standing time provides sufficient time for the soft rubber solution to fully penetrate into the microporous structure, laying a good foundation for subsequent curing, and enabling the subsequent curing to form a soft rubber layer with a uniform and soft touch.

[0018] In one embodiment, the specific steps of step S4 are as follows: Place the hard plastic part coated with the soft glue solution in an oven at a set temperature for a set time to form a soft glue layer on the surface of the hard plastic part and the pore walls of the microporous structure. Since the curing process is carried out in the oven, the constant temperature environment of the oven enables the soft glue solution to form a soft glue layer with a uniform and soft touch on the hard plastic part, resulting in a better curing effect and better meeting the needs of users.

[0019] In one embodiment, the set temperature is 80 degrees Celsius. By setting the temperature to 60 - 120 degrees Celsius, preferably 80 degrees Celsius, it is possible to accelerate the formation of the soft glue layer while avoiding the possibility of softening and deformation of the soft glue layer caused by high temperature.

[0020] In one embodiment, the set time is 30 minutes. By setting the time to 10 - 60 minutes, preferably 30 minutes, it is possible to significantly shorten the production cycle on the premise of thorough curing, taking into account both the molding quality and efficiency, and improving economic benefits. BRIEF DESCRIPTION OF THE DRAWINGS

[0021] Figure 1 It is a schematic flow chart of a method for achieving a soft glue feel on a hard plastic part; Figure 2 It is a schematic flow chart of step S2. DETAILED DESCRIPTION OF THE EMBODIMENTS

[0022] In order to more clearly understand the above - mentioned objects, features, and advantages of the present invention, the present invention will be further described in detail below with reference to the drawings and specific embodiments. It should be noted that, without conflict, the embodiments of the present application and the features in the embodiments can be combined with each other.

[0023] In the following description, many specific details are set forth to fully understand the present invention. However, the present invention can also be implemented in other ways different from those described herein. Therefore, the protection scope of the present invention is not limited by the specific embodiments disclosed below.

[0024] As Figure 1 shown, this embodiment discloses a method for achieving a soft glue feel on a hard plastic part, including the following steps: S1. Prepare a hard plastic part with a microporous structure on its surface; S2. Prepare a soft glue solution; S3. Coat the prepared soft glue solution on the surface of the hard plastic part so that the soft glue solution penetrates into the microporous structure; S4. Cure the soft glue solution to form a soft glue layer on the surface of the hard plastic part and the pore walls of the microporous structure.

[0025] The present application discloses a method for achieving a soft rubber feel on a rigid plastic part. By formulating a soft rubber solution and coating it on the surface of the rigid plastic part, an elastic layer that evenly covers is formed after curing, so that a soft touch is formed on the surface of the rigid plastic part, significantly improving the rigid defect of traditional rigid plastics. After the soft rubber solution penetrates into the micropores and cures, bumps with the same number as the micropores are formed on the soft rubber layer, and the bumps can cooperate with the micropores, so that the anti-shedding ability of the soft rubber layer is stronger. Moreover, during the curing or molding process, the microscopic or macroscopic structures of the soft rubber solution and the rigid plastic part are combined with each other. By using the intermolecular force of the soft rubber solution and the principle that the soft rubber solution has a stronger anti-shedding ability in the microporous structure, the interfacial bonding force between the soft rubber solution and the rigid plastic part is enhanced, forming a better fixing effect. This design greatly improves the adhesion between the soft rubber layer and the rigid plastic part, overcoming the pain points of easy peeling and shedding of traditional coatings. Moreover, the soft rubber layer can still remain stable under complex environments such as long-term friction, temperature and humidity changes, avoiding the touch degradation caused by interface failure and extending the service life of the product.

[0026] In addition to the features of the above embodiments, this embodiment further defines that: the pore diameter of the microporous structure is 10-100 μm. With the pore diameter of the microporous structure being 10-100 μm, the pore diameter of the microporous structure will not be too small, making it difficult for the soft rubber solution to be fully infiltrated, resulting in a small interfacial bonding force between the soft rubber solution and the rigid plastic part during the curing process, so that the soft rubber layer is not easily peeled off and detached. The pore diameter of the microporous structure will not be too large, resulting in poor properties such as the strength and wear resistance of the rigid plastic part. This balanced design enables the plastic part to achieve a good soft feel while retaining its original rigidity.

[0027] In addition to the features of the above embodiments, this embodiment further defines that: the porosity of the microporous structure is 20-80%. Definition of porosity: Porosity refers to the proportion of the pore volume in the total volume of the material. With the porosity of the microporous structure being 20-80%, the moderate porosity provides sufficient space for the penetration of the soft rubber solution. Combining with the smaller pore diameter of the microporous structure and the larger volume of the material, there are numerous micropores, ensuring that the soft rubber solution can fully infiltrate the numerous micropores and form a uniformly covered soft rubber layer, thus forming multiple anchoring points between the soft rubber layer and the micropores, enhancing the interfacial bonding force between the soft rubber solution and the plastic part, and making the soft rubber layer not easily shed. Moreover, it will not cause too high porosity resulting in loss of substrate strength.

[0028] In addition to the features of the above embodiments, this embodiment further defines that the pore diameter of the microporous structure is 50 μm. The optimal pore diameter of the microporous structure is 50 μm, which can avoid insufficient penetration of the soft glue solution due to too small pore diameter, for example, the soft glue solution only covers the surface of the substrate, and the soft glue layer at the micropores is less likely to fall off due to external factors. The large number of joints between the soft glue layer and the micropores is beneficial to enhancing the anchoring points of the soft glue layer, and can effectively disperse the influence of external factors such as pressure, etc. The stability and reliability of the soft glue layer are better. Moreover, it can also avoid the loss of the strength of the substrate due to too large pore diameter, for example, the pore wall is too thin and easy to break, etc., ensuring the strength of the rigid plastic part and not affecting the use of the rigid plastic part.

[0029] In addition to the features of the above embodiments, this embodiment further defines that the porosity of the microporous structure is 50%. By preferably setting the porosity of the microporous structure to 50%, it can provide sufficient penetration space for the soft glue solution, ensure that the solution fully wets the pore wall and forms a continuous coverage, while retaining enough solid structure to maintain the rigidity of the rigid plastic part. This design can form multiple anchoring points between the soft glue layer and the micropores while maintaining the strength of the rigid plastic part, and the stability and reliability of the soft glue layer are good. This design greatly enhances the interfacial bonding force between the soft glue solution and the plastic part, thereby improving the adhesion between the soft glue layer and the rigid plastic part, making the soft glue layer not easy to fall off.

[0030] In addition to the features of the above embodiments, this embodiment further defines that the specific steps of step S1 are as follows: A microscale or nanoscale microporous structure is formed on the surface of the rigid plastic part by one or more of injection molding, mold etching, and laser engraving. Definition of mold etching: Microporous textures are prefabricated on the surface of the mold by chemical or physical means to ensure the consistency of the pore structure of each plastic part in mass production. These three processes of injection molding, mold etching, and laser engraving can be used alone or in combination, which can take into account the mass production efficiency and high-precision requirements, and break through the design limitations of traditional single processes.

[0031] As Figure 2As shown, in addition to the features of the above embodiments, this embodiment further defines that the specific steps of step S2 are as follows: S21. Heat the thermoplastic elastomer to a molten state to obtain a molten thermoplastic elastomer; S22. Mix the molten thermoplastic elastomer, solvent and additives according to a mass ratio to prepare a soft glue solution. By heating the thermoplastic elastomer (TPE) to a molten state, the solid thermoplastic elastomer is transformed into a liquid state, which is convenient for making a soft glue solution and more convenient for coating on hard plastic parts. The addition of the thermoplastic elastomer and additives can bring a soft glue feel, and the solvent has a diluting effect. Therefore, the addition of the solvent can dissolve and mix various materials together to prepare a soft glue solution with a certain viscosity and fluidity. The addition of the solvent can significantly improve the fluidity and permeability of the soft glue solution, so that the soft glue solution can smoothly penetrate into the microporous structure to form a stable soft glue layer and improve the soft feel. The soft glue solution made by this method has both a soft touch and anti-deformation ability, and is not easy to harden, crack or deform after long-term use, and has strong practicability.

[0032] In addition to the features of the above embodiments, this embodiment further defines that the thermoplastic elastomer is one or more of styrenic thermoplastic elastomers, polyurethane thermoplastic elastomers and polyolefin thermoplastic elastomers. By using one of styrenic thermoplastic elastomers (SBS), polyurethane thermoplastic elastomers (TPU) and polyolefin thermoplastic elastomers (TPO) alone or in combination, a soft glue solution that forms a soft glue layer with a soft touch after curing can be made. By selecting different thermoplastic elastomers, the soft hardness of the finally formed soft glue layer can be adjusted to meet the user's needs.

[0033] In addition to the features of the above embodiments, this embodiment further defines that the mass ratio of the molten thermoplastic elastomer, solvent and additives is 10:80:10. By the mass fraction of the molten thermoplastic elastomer being 10%, it can provide a stable soft glue feel and avoid the viscosity of the soft glue solution being too high due to too high a concentration, which affects the fluidity and permeability of the soft glue solution. By the mass fraction of the additives being 10%, it can optimize the soft glue feel of the soft glue layer. By the mass fraction of the solvent being 80%, it can significantly improve the fluidity of the soft glue solution, so that the materials are fully mixed to form a soft glue solution. This preferred ratio enables the soft glue solution to spread evenly on the hard plastic part, thereby forming a soft glue layer with a uniform soft feel.

[0034] In addition to the features of the above embodiments, this embodiment further defines that: the thermoplastic elastomer is a styrenic thermoplastic elastomer. By selecting a styrenic thermoplastic elastomer as the soft rubber material, the cured soft rubber layer can have a certain elasticity and a soft touch, effectively eliminating the stiffness of the hard plastic parts. Moreover, styrenic elastomers have excellent fluidity in the molten state and can be fully mixed with solvents and additives to form a homogeneous solution, giving the soft rubber layer a uniform soft touch.

[0035] In addition to the features of the above embodiments, this embodiment further defines that: the solvent is toluene. Since the solvent is toluene, toluene has a strong dissolving ability for styrenic thermoplastic elastomers and can quickly form a stable and homogeneous soft rubber solution with the molten thermoplastic elastomer and additives, making it easier for the soft rubber solution to penetrate into the microporous structure. Moreover, toluene has a low cost, which can create better economic benefits.

[0036] In addition to the features of the above embodiments, this embodiment further defines that: the additive is a plasticizer. By selecting a plasticizer as the additive to form a soft rubber solution, the plasticizer can penetrate between the molecular chains of the thermoplastic elastomer, weakening the intermolecular forces and making the cured soft rubber layer exhibit soft and elastic characteristics, eliminating the hard touch of the hard plastic. This design applied to components that require high-frequency contact can significantly improve user comfort.

[0037] In addition to the features of the above embodiments, this embodiment further defines that: the specific steps of step S3 are as follows: the soft rubber solution is uniformly coated on the surface of the hard plastic part by one or more of spraying, dipping, brushing, and rolling, and left standing for 10 minutes to allow the soft rubber solution to penetrate into the microporous structure. The separate use or combined use of spraying, dipping, brushing, and rolling enables the sol solution to be uniformly coated on the hard plastic part, with good flexibility. The 10-minute standing time provides sufficient time for the soft rubber solution to fully penetrate into the microporous structure, laying a good foundation for subsequent curing and enabling the subsequent curing to form a soft rubber layer with a uniform and soft touch.

[0038] In addition to the features of the above embodiments, this embodiment further defines that: the specific steps of step S4 are as follows: the hard plastic part coated with the soft rubber solution is placed in an oven at a set temperature for a set time to form a soft rubber layer on the surface of the hard plastic part and the pore walls of the microporous structure. Since the curing process is carried out in the oven, the constant temperature environment of the oven enables the soft rubber solution to form a soft rubber layer with a uniform and soft touch on the hard plastic part, with a better curing effect and more in line with user requirements.

[0039] In addition to the features of the above embodiments, this embodiment further defines that: the set temperature is 80 degrees Celsius. By setting the temperature to 60 - 120 degrees Celsius, preferably 80 degrees Celsius, it is possible to accelerate the formation of the soft glue layer while avoiding the possibility of softening and deformation of the soft glue layer caused by high temperature.

[0040] In addition to the features of the above embodiments, this embodiment further defines that: the set time is 30 minutes. By setting the time to 10 - 60 minutes, preferably 30 minutes, it is possible to significantly shorten the production cycle on the premise of thorough curing, taking into account both the molding quality and efficiency, and improving economic benefits.

[0041] The above embodiments only represent several implementation manners of the present invention, and the description thereof is relatively specific and detailed, but it should not be construed as a limitation on the scope of the invention patent. 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 belong to the protection scope of the present invention. Therefore, the protection scope of the present invention patent shall be subject to the appended claims.

Claims

1. A method for achieving a soft-glue feel on a hard plastic part, characterized in that: The steps include: S1. Preparing a hard plastic part having a microporous structure on the surface; S2, preparing soft gel solution; S3, coating the prepared soft glue solution on the surface of the hard plastic part, so that the soft glue solution penetrates into the microporous structure; S4, curing the soft glue solution to form a soft glue layer on the surface of the hard plastic part and the pore wall of the microporous structure.

2. The method for achieving a soft-glue feel on a hard plastic part according to claim 1, characterized in that: The pore size of the microporous structure is 10-100 μm; And / or the porosity of the microporous structure is 20-80%.

3. The method for achieving a soft-glue feel on a hard plastic part according to claim 1, characterized in that: The pore size of the microporous structure is 50 μm; And / or the porosity of the microporous structure is 50%.

4. The method for achieving a soft-glue feel on a hard plastic part according to claim 1, characterized in that: The specific steps of step S1 are as follows: forming a micron-scale or nano-scale microporous structure on the surface of the hard plastic part by one or more methods selected from injection molding, mold etching and laser engraving.

5. The method for achieving a soft-glue feel on a hard plastic part according to claim 1, characterized in that: The specific steps of step S2 are as follows: S21, heating the thermoplastic elastomer to a molten state to obtain a molten thermoplastic elastomer; S22, mixing the molten thermoplastic elastomer, the solvent and the additive according to a mass ratio to prepare a soft glue solution.

6. The method for achieving a soft-glue feel on a hard plastic part according to claim 5, characterized in that: The thermoplastic elastomer is one or more of styrene-based thermoplastic elastomer, polyurethane-based thermoplastic elastomer and polyolefin-based thermoplastic elastomer.

7. The method for achieving a soft-glue feel on a hard plastic part according to claim 5, characterized in that: The mass ratio of the molten thermoplastic elastomer, the solvent and the additive is 10:80:10; and / or the thermoplastic elastomer is a styrene-based thermoplastic elastomer; and / or the solvent is toluene; And / or the auxiliary agent is a plasticizer.

8. The method for achieving a soft-glue feel on a hard plastic part according to claim 1, characterized in that: The specific steps of step S3 are as follows: the soft glue solution is evenly coated on the surface of the hard plastic part by one or more methods of spraying, dipping, brushing and rolling, and left to stand for 10 minutes to allow the soft glue solution to penetrate into the microporous structure.

9. The method for achieving a soft-glue feel on a hard plastic part according to claim 1, characterized in that: The specific steps of step S4 are as follows: placing the hard plastic part coated with the soft glue solution into an oven at a set temperature for a set time to form a soft glue layer on the surface of the hard plastic part and on the pore walls of the microporous structure.

10. The method for achieving a soft-glue feel on a hard plastic part according to claim 9, characterized in that: The set temperature is 80 degrees Celsius; And / or the set time is 30 minutes.

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