Preparation method of anti-fingerprint smudginess plastic and anti-fingerprint smudginess plastic

Abstract

The invention relates to a preparation method of an anti-fingerprint smudginess plastic and the anti-fingerprint smudginess plastic. The preparation method comprises the following steps: step S1, mixing the following compound components to obtain a mixed material; wherein the mass ratio of the compound components is as follows: 90-110 parts of thermoplastic plastic particles, 1-3 parts of an anti-fingerprint agent, 0.2-1 part of a dispersing agent and 0.1-0.5 part of an antioxidant; s2, adding the mixed material into a double-screw extruder for melt blending, and performing extrusion granulation; and S3, carrying out injection molding on the pelletized material to obtain a fingerprint smudginess-resistant plastic finished product. A melt blending method is adopted, the process is simple, and industrial production is easy to realize; the raw materials used in the invention are low in price, small in addition amount and obvious in cost advantage; and the anti-fingerprint agent is uniformly dispersed in the plastic matrix, so that the anti-fingerprint smudginess performance is lasting and stable.

Description

Technical Field

[0001] The invention belongs to the technical field of polymer materials, and particularly relates to a preparation method of anti-fingerprint and anti-fouling plastic and the anti-fingerprint and anti-fouling plastic. Background Art

[0002] Plastic products, thanks to their significant advantages such as lightness, durability, and low cost, have gained widespread application in daily life and industrial production. From daily necessities to industrial parts, plastic products are ubiquitous, greatly satisfying people's diverse needs.

[0003] However, traditional plastics have significant flaws. Their surfaces are easily stained by fingerprints and stains. Once left, these marks not only severely impact the product's aesthetics but are also difficult to clean and thoroughly remove. This issue is particularly pronounced in high-end product applications, directly limiting the expansion and application of plastic products in this market.

[0004] To address the above-mentioned issues, the industry currently uses the following methods to improve the anti-fingerprint and anti-fouling properties of plastic surfaces: the first is a surface coating method, which involves coating the plastic surface with an anti-fingerprint coating such as a fluorine-containing coating or a silicone oil coating. This method has a relatively simple process, but the coating has poor wear resistance and is prone to wear and shedding during use, and its durability cannot meet the requirements of long-term use. The second is a surface modification method, which involves changing the chemical structure of the plastic surface through technical means such as plasma treatment and ultraviolet light irradiation to improve its hydrophobicity and oleophobicity. Although this method can achieve a long-lasting anti-fingerprint effect, the process is complex, and the required equipment and technical requirements are high, resulting in a significant increase in cost. The third is a product surface texture treatment method, which involves applying special texture treatment to the mold surface, such as making a frosted texture, to reduce the visual impact of fingerprint adhesion to a certain extent. However, this method fails to fundamentally solve the problem of fingerprint adhesion, and the mold manufacturing process is complex and costly. At the same time, it is not applicable to products with high-gloss appearance requirements, and has significant application limitations.

[0005] Therefore, the present invention provides a method for preparing anti-fingerprint and anti-fouling plastic to solve the above technical problems. Summary of the Invention

[0006] In view of the above problems, the purpose of the present invention is to provide a method for preparing anti-fingerprint and anti-fouling plastics, which can solve the problems of complicated existing plastic processes, high costs, and poor anti-fingerprint and anti-fouling effects.

[0007] In a first aspect, an embodiment of the present invention provides a method for preparing a fingerprint-resistant plastic, the method comprising the following steps:

[0008] Step S1, mixing the following compound components to obtain a mixed material; wherein the mass ratio of the compound components is: 90-110 parts of thermoplastic plastic particles, 1-3 parts of anti-fingerprint agent, 0.2-1 parts of dispersant and 0.1-0.5 parts of antioxidant;

[0009] Step S2, adding the mixed material into a twin-screw extruder for melt blending, and extruding into granules;

[0010] Step S3: injection molding the granulated material to obtain a fingerprint-resistant plastic product.

[0011] Preferably, the anti-fingerprint agent is a fluorine-containing compound or an organosilicon compound.

[0012] Preferably, in step S1, the fluorine-containing compound is perfluoroalkyl acrylate, the organosilicon compound is polydimethylsiloxane, and the mass fractions of the perfluoroalkyl acrylate and the polydimethylsiloxane are both 0.5% to 5%.

[0013] Preferably, the dispersant is zinc stearate or polyethylene wax, and its mass fraction is 0.1% to 1%.

[0014] Preferably, the antioxidant is pentaerythritol tetrakis[β-(3,5-di-tert-butyl-4-hydroxyphenyl)propionate] or dilauryl thiodipropionate, and its mass fraction is 0.1% to 0.5%.

[0015] Preferably, the step S1 specifically includes the following steps:

[0016] The thermoplastic plastic particles, the anti-fingerprint agent, the dispersant and the antioxidant are weighed in parts by mass and mixed at 40-60° C. for 15-30 minutes.

[0017] Preferably, the step S2 specifically includes the following steps:

[0018] The mixed material is fed into a twin-screw extruder, melt-blended at a feeding section temperature of 160-180° C., a melting section temperature of 190-210° C., and a homogenizing section temperature of 200-220° C., and extruded into granules.

[0019] Preferably, the screw speed of the twin-screw extruder is 200-400 r / min, and the die head temperature is 195-205°C.

[0020] Preferably, the step S3 specifically includes the following steps:

[0021] The granulated material is injection molded, wherein the mold temperature is 60-80° C. and the injection pressure is 80-120 MPa, to obtain the anti-fingerprint and anti-fouling plastic product.

[0022] In a second aspect, an embodiment of the present invention provides a fingerprint-resistant plastic, which is prepared based on the above-mentioned method for preparing the fingerprint-resistant plastic.

[0023] Compared with the related art, the present invention obtains a mixture by mixing compound components according to a mass ratio of: 90 to 110 parts of thermoplastic plastic particles, 1 to 3 parts of anti-fingerprint agent, 0.2 to 1 part of dispersant and 0.1 to 0.5 parts of antioxidant; adding the mixture into a twin-screw extruder for melt blending and extrusion granulation; injection molding the granulated material to obtain an anti-fingerprint and anti-fouling plastic finished product; the melt blending method adopts a simple process and is easy to achieve industrial production; the raw materials used in the present invention are low in price and added in a small amount, with obvious cost advantages; the anti-fingerprint agent is uniformly dispersed in the plastic matrix, and the anti-fingerprint and anti-fouling performance is long-lasting and stable. BRIEF DESCRIPTION OF THE DRAWINGS

[0024] Figure 1 The present invention provides a flowchart of a method for preparing a fingerprint-resistant plastic. DETAILED DESCRIPTION

[0025] The following will clearly and completely describe the technical solutions in the embodiments of the present invention in conjunction with the accompanying drawings. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without making creative efforts are within the scope of protection of the present invention.

[0026] First, please refer to the attached Figure 1 The present invention provides a method for preparing an anti-fingerprint and anti-fouling plastic, the preparation method comprising the following steps:

[0027] Step S1, mixing the following compound components to obtain a mixed material; wherein the mass ratio of the compound components is: 90-110 parts of thermoplastic plastic particles, 1-3 parts of anti-fingerprint agent, 0.2-1 parts of dispersant and 0.1-0.5 parts of antioxidant;

[0028] Step S2, adding the mixed material into a twin-screw extruder for melt blending, and extruding into granules;

[0029] Step S3: injection molding the granulated material to obtain a fingerprint-resistant plastic product.

[0030] Specifically, a mixture is prepared by mixing thermoplastic plastic particles, an anti-fingerprint agent, a dispersant, and an antioxidant; the mixture is added to a twin-screw extruder for melt blending and extrusion granulation; and the granulated material is injection molded to obtain a fingerprint-resistant plastic product. This melt blending method is simple and easily scalable. The raw materials used in the present invention are inexpensive and the amount added is small, resulting in significant cost advantages. The anti-fingerprint agent is evenly dispersed in the plastic matrix, resulting in long-lasting and stable anti-fingerprint performance. Furthermore, the present invention is applicable to a variety of thermoplastics, such as polycarbonate, polymethyl methacrylate, and polypropylene.

[0031] In this embodiment, the anti-fingerprint agent is a fluorine-containing compound or an organosilicon compound.

[0032] In this embodiment, in step S1, the fluorine-containing compound is perfluoroalkyl acrylate, the organosilicon compound is polydimethylsiloxane, and the mass fractions of the perfluoroalkyl acrylate and the polydimethylsiloxane are both 0.5% to 5%.

[0033] In this embodiment, the dispersant is zinc stearate or polyethylene wax, and its mass fraction is 0.1% to 1%.

[0034] In this embodiment, the antioxidant is pentaerythritol tetrakis[β-(3,5-di-tert-butyl-4-hydroxyphenyl)propionate] or dilauryl thiodipropionate, and the mass fraction thereof is 0.1% to 0.5%.

[0035] In this embodiment, step S1 specifically includes the following steps:

[0036] The thermoplastic plastic particles, the anti-fingerprint agent, the dispersant, and the antioxidant are weighed in parts by mass and mixed at 40-60° C. for 15-30 minutes. Specifically, the thermoplastic plastic particles, the perfluoroalkyl acrylate, the polyethylene wax, and the antioxidant are weighed in parts by mass and mixed at 40-60° C. for 15-30 minutes.

[0037] In this embodiment, step S2 specifically includes the following steps:

[0038] The mixed material is fed into a twin-screw extruder, melt-blended at a feeding section temperature of 160-180° C., a melting section temperature of 190-210° C., and a homogenizing section temperature of 200-220° C., and extruded into granules.

[0039] In this embodiment, the screw speed of the twin-screw extruder is 200-400 r / min, and the die head temperature is 195-205°C.

[0040] Specifically, the mixed material is fed into a twin-screw extruder. The temperature of 160-180°C in the feed section initially softens the material, facilitating screw conveying. The high temperatures of 190-210°C in the melting section and 200-220°C in the homogenization section completely melt the thermoplastic plastic particles, fully dissolving and evenly dispersing the anti-fingerprint agent, dispersant, and antioxidant in the plastic matrix to form a stable blend. The screw speed is controlled at 200-400 r / min to ensure that the material is subjected to sufficient shear and stirring in the extruder, further enhancing the mixing uniformity of the components. The die temperature is set at 195-205°C to ensure that the blended material is extruded with an appropriate viscosity. After cooling and shaping, extrusion granulation is completed. This step achieves deep fusion of the components through precise temperature and speed control, laying the foundation for the anti-fingerprint and physical properties of the finished product. At the same time, the granulated material is convenient for subsequent injection molding operations.

[0041] In this embodiment, step S3 specifically includes the following steps:

[0042] The granulated material is injection molded, wherein the mold temperature is 60-80° C. and the injection pressure is 80-120 MPa, to obtain a fingerprint-resistant plastic product.

[0043] Specifically, the granulated material is injection molded under the conditions of a mold temperature of 60 to 80°C and an injection pressure of 80 to 120 MPa. The appropriate mold temperature helps the material to cool and shape quickly, avoids internal stress concentration caused by too rapid cooling or product deformation caused by too slow cooling, and ensures the dimensional accuracy and appearance quality of the product. The injection pressure ensures that the material can quickly and fully fill the mold cavity to form a complete and dense plastic product. After this step, the blended material that was uniformly mixed and had stable performance in the early stage is converted into an anti-fingerprint and dirt-resistant plastic product with a specific shape, which stably retains the anti-fingerprint performance on the product surface. At the same time, the product has good mechanical properties and performance to meet the needs of different application scenarios.

[0044] Example 1

[0045] The present invention provides a method for preparing a fingerprint-resistant plastic, the method comprising the following steps:

[0046] S1. Evenly mix 100 parts of polycarbonate particles, 2 parts of perfluoroalkyl acrylate, 0.5 parts of zinc stearate, and 0.2 parts of pentaerythritol tetrakis[β-(3,5-di-tert-butyl-4-hydroxyphenyl)propionate].

[0047] S2. Add the mixed material into a twin-screw extruder for melt blending and extrusion granulation.

[0048] S3, injection molding the granulated material to obtain a fingerprint-resistant polycarbonate product.

[0049] Example 2

[0050] The present invention provides a method for preparing a fingerprint-resistant plastic, the method comprising the following steps:

[0051] S1. Evenly mix 100 parts of polymethyl methacrylate particles, 1 part of polydimethylsiloxane, 0.3 parts of polyethylene wax, and 0.1 parts of dilauryl thiodipropionate.

[0052] S2. Add the mixed material into a twin-screw extruder for melt blending and extrusion granulation.

[0053] S3, injection molding the granulated material to obtain a fingerprint-resistant polymethyl methacrylate product.

[0054] Comparative Example 1

[0055] The present invention provides a method for preparing a fingerprint-resistant plastic, the method comprising the following steps:

[0056] S1. Evenly mix 100 parts of polycarbonate particles, 0.5 parts of zinc stearate, and 0.2 parts of pentaerythritol tetrakis[β-(3,5-di-tert-butyl-4-hydroxyphenyl)propionate].

[0057] S2. Add the mixed material into a twin-screw extruder for melt blending and extrusion granulation.

[0058] S3, injection molding the granulated material to obtain a fingerprint-resistant polycarbonate product.

[0059] It can be seen that the process of Comparative Example 1 is the same as that of Example 1, but no anti-fingerprint agent is added to prepare a common polycarbonate product.

[0060] In summary, the following performance tests were performed on the plastic products prepared in Example 1, Example 2, and Comparative Example 1:

[0061] Fingerprint adhesion test: Press the plastic surface with your finger and observe the fingerprint residue.

[0062] The test results are shown in Table 1 below:

[0063] Table 1 - Test results

[0064] project Example 1 Example 2 Comparison Document 1 Fingerprint attachment No obvious fingerprints No obvious fingerprints Obvious fingerprints

[0065] Therefore, the anti-fingerprint plastic prepared by the present invention has excellent anti-fingerprint properties and can be widely used in electronic products, household appliances and other fields. The melt blending method is simple and easy to industrialize. The raw materials used in the present invention are inexpensive and the addition amount is small, which has a significant cost advantage. The anti-fingerprint agent is evenly dispersed in the plastic matrix, and the anti-fingerprint properties are long-lasting and stable.

[0066] In a second aspect, embodiments of the present invention provide a fingerprint-resistant plastic, produced using the aforementioned method. This plastic utilizes inexpensive raw materials and requires minimal additives, resulting in significant cost advantages. The anti-fingerprint agent is evenly dispersed throughout the plastic matrix, providing long-lasting and stable anti-fingerprint performance.

[0067] It should be noted that the above-described embodiments are to be understood as illustrative and not limiting of the scope of protection of the present invention, which is subject to the claims. It will be apparent to those skilled in the art that non-essential improvements and adjustments to the present invention, without departing from the spirit and scope of the present invention, still fall within the scope of protection of the present invention.

Claims

1. A method for preparing anti-fingerprint and anti-fouling plastic, characterized in that: The preparation method comprises the following steps: Step S1, mixing the following compound components to obtain a mixed material; wherein the mass ratio of the compound components is: 90-110 parts of thermoplastic plastic particles, 1-3 parts of anti-fingerprint agent, 0.2-1 parts of dispersant and 0.1-0.5 parts of antioxidant; Step S2, adding the mixed material into a twin-screw extruder for melt blending, and extruding into granules; Step S3: injection molding the granulated material to obtain a fingerprint-resistant plastic product.

2. The method for preparing anti-fingerprint and anti-fouling plastic according to claim 1, characterized in that: The anti-fingerprint agent is a fluorine-containing compound or an organosilicon compound.

3. The method for preparing the anti-fingerprint and anti-fouling plastic according to claim 2, characterized in that: In the step S1, the fluorine-containing compound is perfluoroalkyl acrylate, the organosilicon compound is polydimethylsiloxane, and the mass fractions of the perfluoroalkyl acrylate and the polydimethylsiloxane are both 0.5% to 5%.

4. The method for preparing anti-fingerprint and anti-fouling plastic according to claim 1, characterized in that: The dispersant is zinc stearate or polyethylene wax, and its mass fraction is 0.1% to 1%.

5. The method for preparing anti-fingerprint and anti-fouling plastic according to claim 1, characterized in that: The antioxidant is pentaerythritol tetrakis[β-(3,5-di-tert-butyl-4-hydroxyphenyl)propionate] or dilauryl thiodipropionate, and its mass fraction is 0.1% to 0.5%.

6. The method for preparing anti-fingerprint and anti-fouling plastic according to claim 1, characterized in that: The step S1 specifically includes the following steps: The thermoplastic plastic particles, the anti-fingerprint agent, the dispersant and the antioxidant are weighed in parts by mass and mixed at 40-60° C. for 15-30 minutes.

7. The method for preparing anti-fingerprint and anti-fouling plastic according to claim 1, characterized in that: The step S2 specifically includes the following steps: The mixed material is fed into a twin-screw extruder, melt-blended at a feeding section temperature of 160-180° C., a melting section temperature of 190-210° C., and a homogenizing section temperature of 200-220° C., and extruded into granules.

8. The method for preparing anti-fingerprint and anti-fouling plastic according to claim 7, characterized in that: The screw speed of the twin-screw extruder is 200-400 r / min, and the die head temperature is 195-205° C.

9. The method for preparing anti-fingerprint and anti-fouling plastic according to claim 1, characterized in that: The step S3 specifically includes the following steps: The granulated material is injection molded, wherein the mold temperature is 60-80° C. and the injection pressure is 80-120 MPa, to obtain the anti-fingerprint and anti-fouling plastic product.

10. A fingerprint-resistant plastic, characterized in that: The anti-fingerprint and anti-fouling plastic is prepared based on the preparation method of the anti-fingerprint and anti-fouling plastic according to any one of claims 1 to 9.

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