Manufacturing method of porous plastic, porous plastic, wrist strap and wearable equipment
Through the porous plastic production method, water-soluble particles and additives are used to form porous plastic, which solves the problem of insufficient breathability of limiting parts of wearable equipment, reduces production costs and improves the breathability and mechanical properties of the product. It is suitable for Wristbands and limiting components for wearable devices.
Patent Information
- Application Number
- CN202310764551.4
- Authority / Receiving Office
- CN · China
- Patent Type
- Applications(China)
- Current Assignee / Owner
- Filing Date
- 2023-06-27
- Publication Date
- 2024-12-27
AI Technical Summary
The plastic limiting parts of wearable devices are close to the human skin, resulting in sweat and water vapor that cannot be effectively eliminated, resulting in a decrease in user experience, especially those with sensitive skin, which may experience allergic symptoms such as redness, swelling, and itching. The existing improved methods have increased the cost of mold production. and accuracy requirements affect yield rate.
The porous plastic production method is adopted to mix, mold and heat treatment by preset ratios of raw glue, water-soluble particulate matter and additives to form plastic with porous structure, remove water-soluble particulate matter to improve breathability, and there is no need for a specific mold. Reduce production costs.
It achieves good breathability and mechanical properties, reduces production costs, improves product yield and user experience, and reduces sensitization. It is suitable for wristbands and limiting components of wearable devices.
Smart Images
Figure CN119192655A_ABST
Abstract
Description
Technical Field
[0001] The present disclosure relates to the field of plastic technology, and in particular to a method for manufacturing porous plastic, porous plastic, a wristband and a wearable device. Background Art
[0002] Wearable devices usually use plastic products to make their limiting parts worn on the human body. When users use wearable devices, because the plastic products are in close contact with human skin, sweat and water vapor discharged from the human skin cannot be effectively removed, which greatly reduces the user experience. Especially for people with sensitive skin, this phenomenon can easily cause users to experience allergic symptoms such as redness, swelling, and itching.
[0003] At present, in order to solve this problem, various manufacturers usually improve the structure of the limiting components made of plastic products, such as designing a hollow limiting component, or designing a limiting component with concave or convex patterns on the surface to improve the air permeability of the limiting component. However, the above method is likely to increase the production cost of the mold used to form the limiting component, and has high requirements on the mold precision, which is likely to affect the yield rate. Summary of the invention
[0004] In order to overcome the problems existing in the related art, the present disclosure provides a method for manufacturing porous plastic, porous plastic, wristband and wearable device.
[0005] According to a first aspect of the present disclosure, a method for manufacturing a porous plastic is provided, and the method for manufacturing the porous plastic comprises:
[0006] Provides preset ratios of raw rubber, water-soluble particles and additives;
[0007] Under the first preset condition, the raw rubber, water-soluble particles and additives in the preset ratio are mixed to obtain a mixed rubber;
[0008] Under the second preset condition, the mixed rubber is subjected to a molding process to obtain an initial structure;
[0009] Performing water-soluble treatment on the initial structure to remove the water-soluble particles in the initial structure to obtain a semi-finished plastic with a porous structure;
[0010] Under a third preset condition, the semi-finished plastic is heat treated to obtain the porous plastic.
[0011] In some embodiments of the present disclosure, the preset ratio is expressed in parts by mass as:
[0012] Raw rubber: 100 parts by mass; water-soluble particles: 25-85 parts by mass; additives: 1-5 parts by mass.
[0013] In some embodiments of the present disclosure, the particle size of the water-soluble particulate matter is 0.45 μm-102.36 μm.
[0014] In some embodiments of the present disclosure, the water-soluble particulate matter includes inorganic salts and / or sugars;
[0015] The inorganic salts include one or more of sodium chloride, potassium chloride, sodium sulfate, potassium sulfate, sodium iodide, potassium iodide, and magnesium carbonate; the sugars include one or more of sucrose, glucose, fructose, maltose, and oligosaccharides.
[0016] In some embodiments of the present disclosure, the raw rubber includes one or more of fluororubber, silicone rubber, natural rubber, ethylene-propylene rubber, nitrile rubber, hydrogenated nitrile rubber, butyl rubber, and thermoplastic elastomer;
[0017] Wherein, the fluororubber includes one or more of type 23 fluororubber, type 24 fluororubber, type 26 fluororubber, type 46 fluororubber, and type 246 fluororubber;
[0018] The silicone rubber includes one or more of methyl silicone rubber, methyl vinyl silicone rubber, methyl phenyl vinyl silicone rubber, and fluorosilicone rubber;
[0019] The thermoplastic elastomer includes thermoplastic polyurethane elastomer or styrene-butadiene thermoplastic elastomer.
[0020] In some embodiments of the present disclosure, the auxiliary agent includes one or more of sulfur, a peroxide crosslinking agent, a platinum catalyst, an ammonium crosslinking agent, and triallyl isocyanurate.
[0021] In some embodiments of the present disclosure, the water-soluble treatment of the initial structure includes:
[0022] washing the initial structure with deionized water to make it water-soluble; and / or,
[0023] The initial structure is subjected to water-soluble treatment by ultrasonic cleaning.
[0024] In some embodiments of the present disclosure, the first preset condition includes: a mixing temperature of 60° C.-130° C., and a mixing time of 7 min-30 min.
[0025] In some embodiments of the present disclosure, the molding process includes a molding process or an injection molding process;
[0026] The second preset conditions include: a processing temperature of 160° C.-185° C., and a processing time of 5 min-12 min.
[0027] In some embodiments of the present disclosure, the third preset condition includes: the heat treatment temperature is 150° C.-185° C.;
[0028] When the raw rubber is fluororubber and / or silicone rubber, the heat treatment time is 1h-4h;
[0029] When the raw rubber is a thermoplastic elastomer, the heat treatment time is 5 min-12 min.
[0030] According to a second aspect of the present disclosure, a porous plastic is provided. The porous plastic is manufactured by the method for manufacturing the porous plastic provided by the first aspect of the present disclosure.
[0031] According to a third aspect of the present disclosure, a wristband is provided, wherein the wristband is made of the porous plastic provided by the second aspect of the present disclosure.
[0032] According to a fourth aspect of the present disclosure, a wearable device is provided, wherein the wearable device includes a device body and the wristband provided by the third aspect of the present disclosure.
[0033] The technical solution provided by the embodiments of the present disclosure may include the following beneficial effects: the present disclosure uses water-soluble particles as one of the raw materials for making porous plastics, the water-soluble particles do not dissolve during mixing and shaping to remain in the initial structure, and a semi-finished plastic with a porous structure is obtained by removing the water-soluble particles in the initial structure through water-soluble treatment, and the porous plastic is obtained by heat-treating the semi-finished plastic. The method provided by the present disclosure does not require the introduction of an organic foaming agent, and the production process is environmentally friendly. In addition, without setting up a specific mold, by improving the preparation of raw materials and the production method to form a porous plastic with good air permeability, the production cost is reduced and the yield of the product formed by the porous plastic is improved.
[0034] It is to be understood that the foregoing general description and the following detailed description are exemplary and explanatory only and are not restrictive of the present disclosure. BRIEF DESCRIPTION OF THE DRAWINGS
[0035] The accompanying drawings, which are incorporated in and constitute a part of this specification, illustrate embodiments consistent with the invention and, together with the description, serve to explain the principles of the invention.
[0036] Figure 1 is a flow chart of a method for manufacturing porous plastic according to an exemplary embodiment.
[0037] Figure 2 is a cross-sectional view showing an initial structure according to an exemplary embodiment.
[0038] Figure 3 is a cross-sectional view of a semi-finished plastic product according to an exemplary embodiment. DETAILED DESCRIPTION
[0039] Exemplary embodiments will be described in detail herein, examples of which are shown in the accompanying drawings. When the following description refers to the drawings, the same numbers in different drawings represent the same or similar elements unless otherwise indicated. The embodiments described in the following exemplary embodiments do not represent all embodiments consistent with the present invention. Instead, they are merely examples of devices and methods consistent with some aspects of the present invention as detailed in the appended claims.
[0040] Wearable devices usually use plastic products to make their limiting parts worn on the human body. When users use wearable devices, because the plastic products are in close contact with human skin, sweat and water vapor discharged from the human skin cannot be effectively removed, which greatly reduces the user experience. Especially for people with sensitive skin, this phenomenon can easily cause users to experience allergic symptoms such as redness, swelling, and itching.
[0041] At present, in order to solve this problem, various manufacturers usually improve the structure of the limiting components made of plastic products, such as designing a hollow limiting component, or designing a limiting component with concave or convex patterns on the surface to improve the air permeability of the limiting component. However, the above method is likely to increase the production cost of the mold used to form the limiting component, and has high requirements on the mold precision, which is likely to affect the yield rate.
[0042] In view of this, the present disclosure provides a method for making porous plastic, comprising: providing raw rubber, water-soluble particles and additives in a preset ratio, and mixing the raw rubber, water-soluble particles and additives in a preset ratio under a first preset condition to obtain a mixed rubber. Under a second preset condition, the mixed rubber is subjected to a shaping treatment to obtain an initial structure, and the initial structure is subjected to a water-soluble treatment to remove the water-soluble particles in the initial structure to obtain a semi-finished plastic with a porous structure. Under a third preset condition, the semi-finished plastic is heat-treated to obtain a porous plastic. The method provided by the present disclosure does not require the introduction of an organic foaming agent, and the production process is environmentally friendly. In addition, without the need to set a specific mold, the porous plastic with good air permeability is formed by improving the preparation of raw materials and the production method, thereby reducing production costs and improving the yield of products made of porous plastics.
[0043] An exemplary embodiment of the present disclosure provides a method for making a porous plastic, referring to Figure 1 As shown, Figure 1 FIG. 1 is a flow chart of a method for making porous plastic according to an exemplary embodiment. The method for making porous plastic includes the following steps:
[0044] Step S100, providing raw rubber, water-soluble particles and additives in a preset ratio;
[0045] Step S200, under a first preset condition, mixing raw rubber, water-soluble particles and additives in a preset ratio to obtain a mixed rubber;
[0046] Step S300, performing shaping treatment on the rubber mixture under the second preset condition to obtain an initial structure;
[0047] Step S400, performing water-soluble treatment on the initial structure to remove water-soluble particles in the initial structure, thereby obtaining a semi-finished plastic with a porous structure;
[0048] Step S500: heat-treating the semi-finished plastic under a third preset condition to obtain a porous plastic.
[0049] In step S100, raw rubber, water-soluble particles and additives are raw materials for forming porous plastics. The raw rubber, water-soluble particles and additives are set in a preset ratio. The preset ratio can be the mass percentage or mass ratio between the various raw materials preset by the technicians, so that the formed porous plastic has good air permeability and mechanical properties. In some embodiments, the preset ratio is expressed in mass parts as: raw rubber: 100 mass parts; water-soluble particles: 25-85 mass parts; additives: 1-5 mass parts.
[0050] Among them, the raw rubber is the matrix material for forming porous plastic, that is, the rubber material that has not been vulcanized. The raw rubber can be, for example, silicone rubber, fluororubber, natural rubber and other common rubber materials for forming plastic. The raw rubber can include, for example, one of fluororubber, silicone rubber, natural rubber, ethylene-propylene rubber, nitrile rubber, hydrogenated nitrile rubber, butyl rubber and thermoplastic elastomer; among them, fluororubber includes one or more of 23-type fluororubber, 24-type fluororubber, 26-type fluororubber, 46-type fluororubber and 246-type fluororubber; silicone rubber includes one or more of methyl silicone rubber, methyl vinyl silicone rubber, methyl phenyl vinyl silicone rubber and fluorosilicone rubber; thermoplastic elastomer includes thermoplastic polyurethane elastomer (Thermoplastic Urethane, TPU) or styrene-butadiene-styrene thermoplastic elastomer (SBS).
[0051] Since water-soluble particles are only soluble in water or polar solvents, in the subsequent mixing and shaping process, water-soluble particles are dispersed in the raw rubber in the form of solid particles, that is, in the subsequent steps, water-soluble particles can be coated in the initial structure, and after the water-soluble particles are removed and heat-treated, a porous plastic with a porous structure can be obtained (described in detail later). In the case where the raw rubber has a fixed mass of 100 parts by mass, when the water-soluble particles are too much, although the air permeability of the porous plastic finally formed is enhanced, too many pores will cause the mechanical properties of the porous plastic to decrease; when the water-soluble particles are too few, the pores in the porous plastic are less, and the demand for air permeability cannot be met. Therefore, the water-soluble particles are controlled to be in a suitable mass to balance the mechanical properties and air permeability of the porous plastic formed later. Exemplarily, the mass of the water-soluble particles is 25-85 parts by mass, preferably 30-80 parts by mass, more preferably 40-65 parts by mass, and more preferably 50-55 parts by mass.
[0052] Exemplarily, the particle size range of the water-soluble particulate matter is 0.45 μm-102.36 μm, so that the pore size of the pores formed in the porous plastic is between 0.45 μm-102.36 μm. When the particle size of the water-soluble particulate matter is too large, although the air permeability of the porous plastic is enhanced, the excessive pores will cause the mechanical properties and reliability of the formed porous plastic to decrease; when the particle size of the water-soluble particulate matter is too small, the pores in the porous plastic are small and the air permeability requirements cannot be met. Controlling the particle size of the water-soluble particulate matter within a suitable range can balance the mechanical properties and air permeability of the subsequently formed porous plastic. In some embodiments, the particle size range of the water-soluble particulate matter is 0.5 μm-100 μm. In other embodiments, the particle size range of the water-soluble particulate matter is 1 μm-50 μm.
[0053] Exemplarily, the melting point of the water-soluble particulate matter should be higher than the process temperature during the manufacturing process of the porous plastic to avoid the water-soluble particulate matter being unable to maintain the form of solid particulate matter during the manufacturing process, thereby ensuring that the porous plastic finally formed has a porous structure. In some embodiments, the water-soluble particulate matter can be an inorganic salt, or a sugar, or a mixture of an inorganic salt and a sugar. Exemplarily, the inorganic salt can include one or more of sodium chloride, potassium chloride, sodium sulfate, potassium sulfate, sodium iodide, potassium iodide, and magnesium carbonate, and the sugar can include one or more of sucrose, glucose, fructose, maltose, and oligosaccharides, and the present disclosure is not limited to this.
[0054] Auxiliary agents can play an auxiliary role in the refining and molding process of raw rubber, and auxiliary agents can include auxiliary agents with different functions such as crosslinking agents and accelerators. Wherein, under suitable process conditions, the crosslinking agent can cause a chemical reaction between the linear molecular chain in the raw rubber and the crosslinking agent, or cause the linear molecular chains in the raw rubber to react chemically with each other, so that the linear molecular chains in the raw rubber are crosslinked to form a three-dimensional network structure, so as to enhance the elastic strength, wear resistance and mechanical strength of the porous plastic formed. Accelerators can promote the activation of the crosslinking agent, thereby accelerating the crosslinking reaction between the crosslinking agent and the effective molecule, so as to shorten the time of the crosslinking reaction, reduce the crosslinking temperature, thereby increasing the output and reducing the cost. In the case where the raw rubber has a fixed mass of 100 mass parts, the auxiliary agent is controlled to be in a suitable mass to ensure that the porous plastic formed has good mechanical properties. Exemplarily, the mass of the auxiliary agent is 1-5 mass parts, preferably 2-4 mass parts.
[0055] In some embodiments, the auxiliary agent includes one or more of sulfur, peroxide crosslinking agent, platinum catalyst, ammonium crosslinking agent, triallyl isocyanurate (TAIC), and the above auxiliary agents can cause the molecular chains in the raw rubber to undergo crosslinking reaction (commonly known as vulcanization reaction). Exemplarily, the peroxide crosslinking agent generally refers to a crosslinking agent having a peroxide group (-OO-) in the molecule, and according to the different types of groups, the peroxide crosslinking agent can include dialkyl peroxides, peroxyketals, diacyl peroxides and the like. Among them, dialkyl peroxides may include diisopropylbenzene peroxide (commonly known as DCP), di(tert-butylperoxyisopropyl)benzene (commonly known as BIPB) and 2,5-dimethyl-2,5-bis(tert-butylperoxy)hexane (commonly known as double two five); peroxy ketal may include 1,1-bis(tert-butylperoxy)-3,3,5-trimethylcyclohexane (commonly known as 3M); diacyl peroxide may include di(2,4-dichlorobenzoyl) peroxide, which is commonly known as double two four. Ammonium crosslinking agents may include N, N-secinnamyl-1,6-hexanediamine (commonly known as No. 3 vulcanizing agent), triethylenetetramine, tetraethylenepentamine, etc.
[0056] It should be noted that since the structural characteristics of thermoplastic elastomers are different resin segments and rubber segments composed of chemical bonds, they themselves have the physical and mechanical properties of vulcanized rubber. Therefore, when thermoplastic elastomer is selected as the raw rubber material, there is no need to add additives.
[0057] In step S200, raw rubber, water-soluble particles and additives are put into a mixing device, such as an internal mixer or an open mixer, and the raw rubber, water-soluble particles and additives are uniformly dispersed under the mechanical action of the equipment to obtain a mixed rubber. In the mixed rubber, the water-soluble particles are uniformly dispersed in the form of solid particles, so that the porous plastic formed subsequently has a uniform material distribution, so that the mechanical properties of the porous plastic and the pore distribution therein are uniform, and have good air permeability and reliability. The first preset condition can be the operating parameters of the mixing equipment set by the technician according to the composition and ratio of each raw material put into the mixing equipment, for example, it can include mixing temperature and mixing time. Exemplarily, the mixing temperature can be any temperature value between 60°C-130°C, and the mixing time can be 7min-30min. In some embodiments, the mixing time can be adjusted based on the mixing temperature, and the higher the mixing temperature, the shorter the mixing time.
[0058] In step S300, when the rubber compound is molded, different processes such as calendaring, extrusion or compression molding can be used to form an initial structure of a desired shape and size. The initial structure formed can be the shape and size of the product to be made of the porous plastic, or any other shape, and the porous plastic formed by the initial structure is subsequently used to make a product of the desired shape. Figure 2 As shown, Figure 2 1 is a cross-sectional view of an initial structure shown as an example, in which the water-soluble particles 10 are dispersed in the initial structure 100 in the form of solid particles. The second preset condition may be an operating parameter of the molding equipment set by the technician according to the components of each raw material in the rubber compound, for example, the processing temperature and processing time of the molding equipment.
[0059] In some embodiments, the molding process may include a molding process or an injection molding process. For example, for a rubber compound formed by different types of raw rubber, a molding process suitable for the component can be selected so that the porous plastic made of the initial structure has better mechanical properties. For example, when a rubber compound formed by silicone rubber and / or fluororubber is molded, a molding process can be used; when a rubber compound formed by a thermoplastic elastomer is molded, an injection molding process can be used. When the rubber compound is molded, the second preset condition may specifically include a processing time and a processing temperature of the molding process. The processing temperature of the molding process may be any temperature value between 160°C and 185°C, and the processing time of the molding process may be 5min-12min. In some embodiments, the processing time of the molding process can be adjusted based on the processing temperature. The higher the processing temperature, the shorter the corresponding processing time.
[0060] It should be noted that during the molding process, a certain temperature will be provided to the rubber compound for a certain period of time. The additives in the rubber compound will cause some rubber molecular chains to cross-link. However, due to the short duration, the additives in the initial structure of the molding are not completely reacted. In other words, part of the cross-linking reaction is not completed, and not all rubber molecules are cross-linked.
[0061] In step S400, Figure 2 and Figure 3 As shown, Figure 3 It is a cross-sectional view of a semi-finished plastic as an example. Since the water-soluble particles 10 in the initial structure 100 are easily soluble in water and polar solvents such as methanol and ethanol, when the initial structure 100 is subjected to a water-soluble treatment, the initial structure 100 can be placed in clean water or a polar solvent so that the water-soluble particles 10 in the initial structure 100 are dissolved and removed, thereby leaving pores 20 inside the semi-finished plastic 200 obtained after the water-soluble treatment, so as to obtain a semi-finished plastic 200 with a porous structure.
[0062] In some embodiments, when the initial structure is treated to be water-soluble, deionized water can be used to clean the initial structure. For example, the initial structure can be immersed in deionized water for a certain period of time, or the initial structure can be rinsed with deionized water with a certain water pressure to dissolve the water-soluble particles in the initial structure.
[0063] In other embodiments, the initial structure can be treated with water solubility by ultrasonic cleaning, and deionized water or polar solvents such as methanol and ethanol can be used as cleaning liquid. During ultrasonic cleaning, the water-soluble particles in the initial structure can be slowly dissolved in the cleaning liquid, and at the same time, the high-frequency oscillation signal emitted by the ultrasonic generator is converted into high-frequency mechanical oscillation by the transducer, and the ultrasonic wave is radiated into the cleaning liquid through the cleaning tank wall, and bubbles are generated in the cleaning liquid, and the bubbles are broken as the cleaning liquid is compressed, generating a large number of microbubbles. The microbubbles keep vibrating under the action of ultrasonic waves, so that the partially dissolved water-soluble particles are fatigued and the water-soluble particles are separated from the initial structure.
[0064] In other embodiments, the initial structure may be first cleaned with deionized water and then ultrasonically cleaned to improve the effectiveness of the water-soluble treatment, prevent some water-soluble particles from remaining inside the initial structure, and prevent water-soluble particles from causing stress to the product during the use of the product formed by the porous plastic, thereby improving the reliability of the product and further improving the air permeability of the porous plastic.
[0065] In step S500, heat treatment is to provide a specific temperature to the semi-finished plastic with a porous structure, and the additives in the semi-finished plastic work to make the rubber molecular chains completely cross-linked, and the rubber molecular chains react chemically with each other to form a three-dimensional network structure, thereby obtaining a porous plastic with good elastic strength, mechanical strength and wear resistance. The third preset condition can be the equipment operation parameters set by the technician according to the composition of each raw material forming the semi-finished plastic, for example, it can include heat treatment time and heat treatment temperature.
[0066] Exemplarily, the temperature range for heat treatment of semi-finished plastics can be 150°C-185°C. Specifically, for semi-finished plastics formed by different types of raw rubber, a heat treatment process that is more suitable for the component can be selected so that the porous plastic formed has better mechanical properties. For example, when heat treating semi-finished plastics formed by silicone rubber and / or fluororubber, the heat treatment temperature can be between 160°C-185°C. Since auxiliary agents need to be set in silicone rubber and / or fluororubber for cross-linking, a longer heat treatment time needs to be set. The heat treatment time can be between 1h-4h, so that the rubber molecules in the semi-finished plastic can fully cross-link, and at the same time, the stress in the semi-finished plastic can be eliminated, so that the porous plastic formed has good mechanical properties. Exemplarily, the heat treatment time can be adjusted based on the heat treatment temperature. The higher the heat treatment temperature, the shorter the corresponding heat treatment time.
[0067] When the semi-finished plastic formed by the thermoplastic elastomer is heat treated, the heat treatment temperature can be between 150°C and 180°C. Since the semi-finished plastic formed by the thermoplastic elastomer does not contain additives, it does not need to be cross-linked, so a shorter heat treatment time can be set, and the heat treatment time can be between 5min and 12min. Heat treatment of the semi-finished plastic formed by the thermoplastic elastomer can eliminate the residual stress in the semi-finished plastic, and at the same time shape the semi-finished plastic so that the porous plastic formed by it has good mechanical properties.
[0068] In an exemplary embodiment, the present disclosure further provides a porous plastic, which is produced by the method for producing the porous plastic provided in the above-mentioned embodiment of the present disclosure. Since no organic foaming agent is introduced to form pores during the production process of the porous plastic, the porous plastic has good air permeability and mechanical strength while also having low allergenicity. When the product made of the porous plastic comes into contact with the user's skin, the user's experience can be improved. In addition, when it is necessary to produce a large number of porous plastics with air permeability, the difference between different batches of porous plastics produced by the same process is small, which has industrial practicality.
[0069] In an exemplary embodiment, the present disclosure further provides a wristband, which can be a fixed structure for fixing an item on a user's wrist, such as a watch strap, a wristband, or a wristband set on a mobile phone, a water cup, an earphone box, and other convenient items, and the present disclosure does not limit this. The wristband is made of the porous plastic provided in the above embodiment of the present disclosure. For example, the porous plastic can be used as a raw material, and the porous plastic can be shaped, trimmed, polished, sprayed, etc. according to the required shape and size of the wristband to form a wristband. Exemplarily, in the process of making the porous plastic, when the mixed rubber is molded, a mold or molding parameters can be set according to the required shape and size of the wristband, and the initial structure formed is the shape of the wristband, so that the porous plastic formed is the required wristband, and the present disclosure does not limit this. The wristband provided by the present disclosure has good air permeability and mechanical strength, and also has low sensitization. When the wristband contacts the user's skin, the occurrence of sensitive phenomena can be reduced, and the user's use experience can be improved.
[0070] In an exemplary embodiment, the present disclosure also provides a wearable device, which may include, for example, mobile phones, watches, bracelets and other devices that can be worn on the user's body, and the wearable device includes the wristband and device body provided in the above embodiments. The device body is used to realize the main functions of the wearable device, and the wristband can be fixedly connected to the device body or detachably connected. Through the wristband, the user can fix the device body on the user's body, for example, on the user's wrist. Since the wristband of the wearable device has good air permeability and mechanical strength, and also has low allergenicity, when the user wears and fixes the wearable device, when the wristband contacts the user's skin, the occurrence of sensitivity can be reduced, thereby improving the user's experience and user satisfaction.
[0071] In order to more clearly explain the technical solution of the present disclosure, the following are specific embodiments of using the manufacturing method provided by the present disclosure to manufacture porous plastics, wherein the components, mass parts, manufacturing process parameters used in each embodiment and the performance parameters of the formed porous plastics are shown in Tables 1 to 2.
[0072] Table 1 Components, manufacturing processes and performance parameters of porous plastics corresponding to Examples 1-8
[0073]
[0074] Table 2 Components, manufacturing processes and performance parameters of porous plastics corresponding to Examples 9-16 It can be seen from the above embodiments that the method for making porous plastic provided by the present disclosure, without adding an organic foaming agent, can make the formed porous plastic have a porous structure by using water-soluble particles as one of the preparation raw materials, without the need to use a special mold, thereby saving production costs. By controlling the ratio between the preparation raw materials and the key process parameters in the production process, the formed porous plastic has good tensile strength, which can reach up to 14.5MPa, ensuring that the wristband and wearable device made of porous plastic have good mechanical reliability. In addition, the porous plastic formed by the present disclosure also has a high elongation at break, that is, the porous plastic has good softness, elasticity and toughness, and is not easy to break when subjected to external impact force, which can improve the service life and reliability of the wristband and wearable device made of porous plastic.
[0075] Those skilled in the art will readily appreciate other embodiments of the present invention after considering the specification and practicing the invention disclosed herein. This application is intended to cover any variations, uses or adaptations of the present invention that follow the general principles of the present invention and include common knowledge or customary techniques in the art that are not disclosed in this disclosure. The specification and examples are to be considered exemplary only, and the true scope and spirit of the present invention are indicated by the following claims.
[0076] It should be understood that the present invention is not limited to the exact construction that has been described above and shown in the drawings and that various modifications and changes may be made without departing from the scope thereof. The scope of the present invention is limited only by the appended claims.
Claims
1. A method for making porous plastic, characterized in that: The method for making the porous plastic comprises: Provides preset ratios of raw rubber, water-soluble particles and additives; Under the first preset condition, the raw rubber, water-soluble particles and additives in the preset ratio are mixed to obtain a mixed rubber; Under the second preset condition, the mixed rubber is subjected to a molding process to obtain an initial structure; Performing water-soluble treatment on the initial structure to remove the water-soluble particles in the initial structure to obtain a semi-finished plastic with a porous structure; Under a third preset condition, the semi-finished plastic is heat treated to obtain the porous plastic.
2. The method for making porous plastic according to claim 1, characterized in that: The preset ratio is expressed in parts by mass as: Raw rubber: 100 parts by mass; Water-soluble particles: 25-85 parts by mass; Additives: 1-5 parts by weight.
3. The method for making porous plastic according to claim 1 or 2, characterized in that: The particle size of the water-soluble particles is 0.45 μm-102.36 μm.
4. The method for making porous plastic according to claim 3, characterized in that: The water-soluble particulate matter includes inorganic salts and / or sugars; The inorganic salts include one or more of sodium chloride, potassium chloride, sodium sulfate, potassium sulfate, sodium iodide, potassium iodide, and magnesium carbonate; the sugars include one or more of sucrose, glucose, fructose, maltose, and oligosaccharides.
5. The method for making porous plastic according to claim 1 or 2, characterized in that: The raw rubber includes one or more of fluororubber, silicone rubber, natural rubber, ethylene-propylene rubber, nitrile rubber, hydrogenated nitrile rubber, butyl rubber, and thermoplastic elastomer; Wherein, the fluororubber includes one or more of type 23 fluororubber, type 24 fluororubber, type 26 fluororubber, type 46 fluororubber, and type 246 fluororubber; The silicone rubber includes one or more of methyl silicone rubber, methyl vinyl silicone rubber, methyl phenyl vinyl silicone rubber, and fluorosilicone rubber; The thermoplastic elastomer includes thermoplastic polyurethane elastomer or styrene-butadiene thermoplastic elastomer.
6. The method for making porous plastic according to claim 1 or 2, characterized in that: The auxiliary agent includes one or more of sulfur, a peroxide crosslinking agent, a platinum catalyst, an ammonium crosslinking agent, and triallyl isocyanurate.
7. The method for making porous plastic according to claim 1, characterized in that: The water-soluble treatment of the initial structure comprises: washing the initial structure with deionized water to make it water-soluble; and / or, The initial structure is subjected to water-soluble treatment by ultrasonic cleaning.
8. The method for making porous plastic according to claim 1, characterized in that: The first preset conditions include: a mixing temperature of 60° C.-130° C., and a mixing time of 7 min.-30 min.
9. The method for making porous plastic according to claim 1, characterized in that: The molding process includes a molding process or an injection molding process; The second preset conditions include: a processing temperature of 160° C.-185° C., and a processing time of 5 min-12 min.
10. The method for making porous plastic according to claim 5, characterized in that: The third preset condition includes: the heat treatment temperature is 150°C-185°C; When the raw rubber is fluororubber and / or silicone rubber, the heat treatment time is 1h-4h; When the raw rubber is a thermoplastic elastomer, the heat treatment time is 5 min-12 min.
11. A porous plastic, characterized in that: The porous plastic is manufactured by the method for manufacturing the porous plastic according to any one of claims 1 to 10.
12. A wristband, characterized in that: The wristband is made of the porous plastic described in claim 11.
13. A wearable device, characterized in that: The wearable device comprises a device body and the wristband according to claim 12.