Preparation method of watchband and watchband

Abstract

The invention provides a preparation method of a watchband and the watchband, and the preparation method comprises the following steps: mixing fluororubber, a cross-linking reaction auxiliary agent, a filler and a first recycled rubber material in a preset state according to a preset mass part to obtain an initial rubber material; performing the initial sizing material to obtain a sizing material with a preset shape; carrying out oil pressure treatment on the rubber material with the preset shape under a first preset condition, so that the rubber material with the preset shape is vulcanized for the first time, and a rubber material vulcanized for the first time is obtained; and trimming the rubber material vulcanized for the first time to obtain the watchband and a second recycled rubber material. According to the watchband preparation method, oil pressure rubber waste generated in the watchband preparation process can be recycled, and the material loss is reduced.

Description

Technical Field

[0001] The present invention relates to the field of watch strap manufacturing, and in particular to a method for preparing a watch strap and a watch strap. Background Art

[0002] Fluororubber is oil-resistant, dirt-resistant, high and low temperature-resistant, and has stable chemical properties, so it is widely used as the strap material for smart wearable products. In the hydraulic process of the fluororubber strap preparation process, due to the difference between the strap shape and the shape of the material pretreatment, in order to ensure the yield rate, a certain amount of material is usually left and squeezed around the shape through hydraulic pressure to form hydraulic rubber waste, which needs to be removed to obtain the strap. However, the hydraulic waste has been vulcanized during the preparation of the strap and can no longer be put into production, so it can only be scrapped, resulting in material loss and increasing the cost of strap production. Summary of the invention

[0003] In order to solve the problems existing in the related art, the present disclosure provides a method for preparing a watch strap and a watch strap.

[0004] According to a first aspect of an exemplary embodiment of the present disclosure, there is provided a method for preparing a watch strap, the method comprising:

[0005] Mixing the fluororubber, the cross-linking reaction aid, the filler and the first recycled rubber material in a preset state according to preset weight fractions to obtain an initial rubber material;

[0006] Preforming the initial rubber material to obtain a rubber material with a preset shape;

[0007] The rubber material having a preset shape is subjected to an oil pressure treatment under a first preset condition, so that the rubber material having a preset shape is first vulcanized to obtain a first vulcanized rubber material;

[0008] The first vulcanized rubber material is trimmed to obtain the watch strap and the second recycled rubber material.

[0009] In some exemplary embodiments, the preset mass fraction includes:

[0010]

[0011]

[0012] In some exemplary embodiments, subjecting the rubber material having a preset shape to an oil pressure treatment under a first preset condition so that the rubber material having a preset shape undergoes a first vulcanization includes:

[0013] The rubber material with the preset shape is heated and pressurized under the first preset condition, so that 20 to 75% of the rubber material with the preset shape is vulcanized.

[0014] In some exemplary embodiments, the first preset condition includes:

[0015] The first preset temperature is 150 to 190 degrees Celsius, and the first preset time is 50 to 150 seconds.

[0016] In some exemplary embodiments, the preset state is a powder state; and the preparation method further comprises:

[0017] The first recycled rubber material is crushed into a powder state.

[0018] In some exemplary embodiments, crushing the first recycled rubber material into a powder state includes one or more of the following methods:

[0019] Crushing the first recycled rubber material into the powder state by mechanical grinding;

[0020] The first recycled rubber material is frozen with liquid nitrogen and then ground into the powder state.

[0021] In some exemplary embodiments, the particle size of the first recycled rubber material in a preset state is 0.04 to 105.23 μm, preferably 0.08 to 80.32 μm.

[0022] In some exemplary embodiments, fluororubber, a cross-linking reaction aid, a filler, and a first recycled rubber material in a preset state are mixed according to preset weight fractions to obtain an initial rubber material, including:

[0023] Mixing the fluororubber, the cross-linking reaction aid and the filler to obtain a first rubber compound;

[0024] The first rubber material and the first recycled rubber material in a preset state are mixed to obtain the initial rubber material.

[0025] In some exemplary embodiments, mixing the first rubber material with the first recycled rubber material in a preset state comprises:

[0026] The first rubber material and the first recycled rubber material in a preset state are mixed in an open mill for a first preset number of times; wherein each mixing includes:

[0027] Perform the triangle packing process for a second preset number of times, or perform the thin pass process for a third preset duration.

[0028] In some exemplary embodiments, the first preset number of times is 3 to 6 times, the second preset number of times is 5 to 12 times, and the third preset duration is 3 to 7 minutes.

[0029] In some exemplary embodiments, the preparation method further comprises:

[0030] The watch strap is vulcanized for a second time under a second preset condition to obtain a watch strap after the second vulcanization.

[0031] In some exemplary embodiments, vulcanizing the strap for a second time under a second preset condition comprises:

[0032] The watch strap is heated under a second preset condition so that more than 95% of the rubber in the watch strap is vulcanized.

[0033] In some exemplary embodiments, the second preset condition includes:

[0034] The second preset temperature is 160 to 210 degrees Celsius, and the second preset time is 1.5 to 4 hours.

[0035] In some exemplary embodiments, the fluororubber includes one or more of the following:

[0036] Type 23 fluororubber, type 24 fluororubber, type 26 fluororubber, type 46 fluororubber and type 246 fluororubber.

[0037] In some exemplary embodiments, the cross-linking reaction aid includes one or more of the following:

[0038] Peroxide crosslinking agents, bisphenol crosslinking agents, amine crosslinking agents, platinum crosslinking agents and TAIC crosslinking agents.

[0039] In some exemplary embodiments, the filler includes one or more of the following:

[0040] Carbon black, white carbon, diatomaceous earth, talc, calcium silicate, calcium carbonate, barium sulfate, magnesium carbonate, and zinc oxide.

[0041] According to a second aspect of an exemplary embodiment of the present disclosure, a watch strap is provided. The watch strap is manufactured according to the above-mentioned method for manufacturing the watch strap.

[0042] The beneficial effects of the present disclosure include but are not limited to: in the watch strap preparation method provided by the present disclosure, the first recycled rubber material is the hydraulic rubber waste generated in the process of preparing the watch strap, the first recycled rubber material in a preset state is used as the raw material for preparing the watch strap, and is mixed with fluororubber, cross-linking reaction auxiliary agent and filler according to preset mass fractions, and then pre-formed, hydraulically pressed and trimmed to obtain the required watch strap and the second recycled rubber material, wherein the second recycled rubber material can be used as the raw material for the next round of watch strap preparation to prepare the watch strap. The watch strap preparation method can recycle the hydraulic rubber waste generated in the process of preparing the watch strap, reduce material loss, improve material utilization, save the cost of watch strap production, and is low-carbon and environmentally friendly.

[0043] 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

[0044] The accompanying drawings incorporated into the specification and constituting a part of the specification illustrate embodiments of the present disclosure and are used together with the description to explain the principles of the embodiments of the present disclosure. In these drawings, similar reference numerals are used to represent similar elements. The drawings described below are some embodiments of the present disclosure, rather than all embodiments. For those skilled in the art, other drawings can be obtained based on these drawings without paying creative work.

[0045] Figure 1 A schematic diagram of a method for preparing a watchband according to an exemplary embodiment of the present disclosure;

[0046] Figure 2 This is a schematic flow chart of an exemplary embodiment of the present disclosure for mixing fluororubber, a cross-linking reaction aid, a filler and a first recycled rubber in a preset state according to preset mass fractions to obtain an initial rubber. DETAILED DESCRIPTION

[0047] In order to make the purpose, technical solutions and advantages of the embodiments of the present disclosure clearer, the technical solutions of the present disclosure will be clearly and completely described below in combination with the embodiments of the present disclosure. Obviously, the described embodiments are part of the embodiments of the present disclosure, rather than all of the embodiments. Based on the embodiments in the present disclosure, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present disclosure. It should be noted that the embodiments in the present disclosure and the features in the embodiments can be arbitrarily combined with each other without conflict.

[0048] Fluororubber is widely used as the strap material of smart wearable products. In the hydraulic process of the preparation of fluororubber straps, due to the difference between the strap shape and the shape of the material pre-processing, in order to ensure the yield rate, a certain amount of material is usually left and squeezed around the shape through hydraulic pressure to form hydraulic rubber waste, which needs to be removed to obtain the strap. However, the hydraulic waste has been vulcanized during the preparation of the strap and can no longer be put into production, so it can only be scrapped, resulting in material loss and increasing the cost of strap production.

[0049] In the related art, the recycling of vulcanized fluororubber is mainly focused on fully vulcanized fluororubber, for example, the fully vulcanized fluororubber partially or completely replaces the raw fluororubber. However, the vulcanization of fluororubber requires heating, and the vulcanized and unvulcanized fluororubbers have different thermal expansion coefficients. When the recycled vulcanized fluororubber is used as a filler and vulcanized together with the unvulcanized fluororubber, the rubber will generate internal stress due to the different thermal expansion coefficients during the heat vulcanization process, so that the rubber materials cannot be well combined, resulting in the phenomenon of reduced performance of the recycled rubber.

[0050] Based on this, the exemplary embodiment of the present disclosure provides a method for preparing a watch strap, such as Figure 1 As shown, the preparation method comprises:

[0051] S100: mixing the fluororubber, the cross-linking reaction aid, the filler and the first recycled rubber material in a preset state according to preset weight fractions to obtain an initial rubber material.

[0052] The hydraulic rubber waste generated in the process of preparing the watch strap is recycled and processed so that the hydraulic rubber waste becomes a preset state to obtain a first recycled rubber material in the preset state. The first recycled rubber material in the preset state is used as a raw material for preparing the watch strap and is put into the subsequent watch strap preparation process. The hydraulic rubber waste generated in the production process can be recycled, thereby reducing material loss and saving the cost of watch strap production.

[0053] The fluororubber, the cross-linking reaction aid, the filler and the first recycled rubber in a preset state are mixed according to preset mass fractions, for example, they can be mixed in an open mill to obtain an initial rubber for subsequent watch strap preparation.

[0054] S200: preforming the initial rubber material to obtain a rubber material with a preset shape.

[0055] The initial rubber material obtained in step S100 is extruded through an extruder to preform the initial rubber material to obtain a rubber material with a preset shape; or, if the initial rubber material obtained in step S100 is a sheet-shaped initial rubber material with a certain thickness, the initial rubber material can also be preformed by cutting to obtain a rubber material with a preset shape. For example, the preset shape of the preformed material can be a shape close to the desired watch strap.

[0056] S300: performing an oil pressure treatment on the rubber material having a preset shape under a first preset condition, so that the rubber material having the preset shape undergoes a first vulcanization, thereby obtaining a first vulcanized rubber material.

[0057] The rubber material with a preset shape obtained in step S200 is placed in a mold, wherein the mold has the shape of the prepared watch strap, and the mold is subjected to oil pressure treatment under first preset conditions, so that the components in the rubber material with the preset shape undergo a chemical reaction under the conditions of heat and pressure, that is, vulcanization occurs, so that the rubber in the rubber material is cross-linked from linear macromolecules to three-dimensional network macromolecules, so that the rubber material forms a first vulcanized rubber material with excellent properties such as high strength, high elasticity, high wear resistance, and corrosion resistance, and the first vulcanized rubber material has initially the shape of the prepared watch strap.

[0058] S400: trimming the first vulcanized rubber to obtain a watch strap and a second recycled rubber.

[0059] When the rubber material with a preset shape is subjected to oil pressure treatment under the first preset condition in step S300, oil pressure rubber waste will be squeezed around the rubber material shape to form. Therefore, after the oil pressure vulcanization is completed, the first vulcanized rubber material needs to be trimmed or trimmed to remove the oil pressure rubber waste formed by squeezing around the first vulcanized rubber shape, so that the first vulcanized rubber material finally forms the shape of a watch strap to obtain a watch strap. In addition, the trimmed oil pressure rubber waste is recycled to obtain a second recycled rubber material. After the second recycled rubber material is subjected to certain treatment to form a preset state, it can be used as a raw material for preparing the watch strap and put into the next round of watch strap preparation process, which can reduce material loss and save the cost of watch strap production.

[0060] In the watch strap preparation method provided by the exemplary embodiment of the present disclosure, the first recycled rubber material is the hydraulic rubber waste generated in the process of preparing the watch strap. The first recycled rubber material in a preset state is used as the raw material for preparing the watch strap, and is mixed with fluororubber, a cross-linking reaction aid and a filler according to preset mass fractions, and then pre-formed, hydraulically pressed and trimmed to obtain the required watch strap and the second recycled rubber material. The second recycled rubber material can be used as the raw material for the next round of watch strap preparation to prepare the watch strap. The watch strap preparation method can recycle the hydraulic rubber waste generated in the process of preparing the watch strap, reduce material loss, improve material utilization, save the cost of watch strap production, and is low-carbon and environmentally friendly.

[0061] In the exemplary embodiment provided in the present disclosure, the preset mass parts include: 80 to 120 parts of fluororubber, 1 to 5 parts of cross-linking reaction aid, 10 to 50 parts of filler, and 5 to 50 parts of first recycled rubber in a preset state.

[0062] The first recycled rubber material in the preset state is obtained by processing the hydraulic waste generated in the previous watch strap preparation process. The first recycled rubber material in the preset state is a vulcanized rubber material, and the vulcanized fluororubber and the unvulcanized fluororubber have different thermal expansion coefficients. When the first recycled rubber material in the preset state is used as a raw material to prepare the watch strap, during the heat vulcanization process, the vulcanized first recycled rubber material and the unvulcanized fluororubber lack chemical bonds, which will generate internal stress due to different thermal expansion coefficients, so that the rubber materials cannot be well combined, resulting in the performance of the vulcanized rubber material being reduced. Therefore, the mass fraction of the first recycled rubber material in the preset state and the mass fraction of the fluororubber, the cross-linking reaction auxiliary agent, and the filler need to be controlled within a suitable range, so that the mass ratio of each component is within a suitable range, so as to realize the chemical bond cross-linking between the first recycled rubber material and the new fluororubber material, improve the combination between the rubber materials, and minimize the performance reduction of the prepared watch strap product due to differences in thermal expansion coefficients, mechanical properties, etc. between the rubber materials.

[0063] In the exemplary embodiment provided in the present disclosure, the mass fraction of the first recycled rubber in a preset state is controlled to be 5-50 parts, the mass fraction of fluororubber is controlled to be 80-120 parts, the mass fraction of the cross-linking reaction auxiliary agent is controlled to be 1-5 parts, and the mass fraction of the filler is controlled to be 10-50 parts. Within the mass fraction range of each component, the first recycled rubber and the new fluororubber material can form chemical bonds for cross-linking, thereby improving the bonding between the rubbers and minimizing the reduction in performance of the prepared watch strap product due to differences in thermal expansion coefficients, mechanical properties, etc. between the rubbers. If the content of the first recycled rubber in the preset state is too high, only interface bonding will exist after the rubber material is vulcanized, thereby reducing the performance of the prepared watch strap. If the content of the first recycled rubber in the preset state is too low, the hardness of the prepared watch strap will be insufficient, thereby causing difficulties in subsequent grinding, crushing, trimming, and other processes.

[0064] In the exemplary embodiments provided in the present disclosure, the fluororubber includes one or more of type 23 fluororubber, type 24 fluororubber, type 26 fluororubber, type 46 fluororubber and type 246 fluororubber.

[0065] Type 23 fluororubber, type 24 fluororubber, type 26 fluororubber, type 46 fluororubber and type 246 fluororubber are all rubber materials with excellent heat resistance, oxidation resistance, oil resistance, corrosion resistance and atmospheric aging resistance. The watch straps prepared using the above fluororubber materials as raw materials have excellent performance and can be widely used in smart wearable products to meet the usage and wearing needs of users.

[0066] In the exemplary embodiments provided in the present disclosure, the cross-linking reaction auxiliary agent includes one or more of a peroxide cross-linking agent, a bisphenol cross-linking agent, an amine cross-linking agent, a platinum cross-linking agent and a TAIC cross-linking agent.

[0067] Cross-linking reaction aids, also known as vulcanizing agents, are compounds with reactive groups. Peroxide cross-linking agents, bisphenol cross-linking agents, amine cross-linking agents, platinum cross-linking agents and TAIC cross-linking agents are all good cross-linking reaction aids. They can react with the matrix polymer in the rubber compound and enter the structure, so that the rubber in the initial rubber compound is cross-linked from linear macromolecules to three-dimensional network macromolecules under conditions of heat and pressure, thereby forming a watch strap with excellent properties such as high strength, high elasticity, high wear resistance and corrosion resistance.

[0068] In an exemplary embodiment provided by the present disclosure, the filler includes one or more of carbon black, white carbon, diatomaceous earth, talc, calcium silicate, calcium carbonate, barium sulfate, magnesium carbonate, and zinc oxide.

[0069] Adding fillers such as carbon black, white carbon black, diatomaceous earth, talcum powder, calcium silicate, calcium carbonate, barium sulfate, magnesium carbonate, and zinc oxide to the raw materials for preparing the watch strap can enhance the mechanical properties of the watch strap, for example, the flexibility, wear resistance, and tear resistance of the watch strap can be enhanced.

[0070] In the exemplary embodiment provided by the present disclosure, the preset state is a powder state. The method for preparing the watch strap further includes: crushing the first recycled rubber material into a powder state.

[0071] The first recycled rubber is the rubber waste generated by trimming and removing the edges after oil pressure in the previous watch strap production process. The rubber waste generated by trimming and removing the edges after oil pressure has different shapes and particle sizes. If it is directly put into production, it will be detrimental to the mixing of raw materials and the subsequent vulcanization of rubber. Therefore, before the first recycled rubber is used as the raw material for preparing the watch strap and put into the subsequent watch strap preparation, in order to ensure the consistency of the raw material particle size, the first recycled rubber needs to be crushed into a powder state.

[0072] In an exemplary embodiment provided in the present disclosure, crushing the first recycled rubber material into a powder state includes: mechanically grinding the first recycled rubber material into a powder state or freezing the first recycled rubber material with liquid nitrogen and then grinding it into a powder state.

[0073] The first recycled rubber is the rubber waste generated by trimming and removing the edges after oil pressure in the previous strap production process. The rubber waste generated by trimming and removing the edges after oil pressure has different shapes and particle sizes. If it is directly put into production, it is not conducive to the mixing of raw materials and the subsequent vulcanization of rubber. Therefore, before the first recycled rubber is used as the raw material for preparing the strap and put into the subsequent strap preparation, in order to ensure the consistency of the raw material particle size, the first recycled rubber needs to be crushed into a powder state. Among them, the first recycled rubber can be crushed into a powder state by mechanical grinding, or by grinding after freezing with liquid nitrogen. Mechanical grinding can crush the first recycled rubber into a powder state by a mechanical crusher or a mechanical grinder. For example, the first recycled rubber can be put into a mechanical crusher, and the airflow is sprayed into the body of the mechanical crusher at a certain pressure to generate a high-speed rotating vortex, so that the first recycled rubber in the body rotates at a high speed with the airflow, and during the rotation, the blocks or particles of the first recycled rubber collide, impact and grind each other, so that the first recycled rubber is crushed into a powder state. Grinding after freezing with liquid nitrogen can be performed by ultra-low temperature freezing with liquid nitrogen and then grinding and crushing the first recycled rubber material into a powder state.

[0074] In the exemplary embodiment provided in the present disclosure, the particle size of the first recycled rubber material in a preset state is 0.04 to 105.23 μm, preferably 0.08 to 80.32 μm.

[0075] In order to ensure the consistency of the particle size of the raw materials, the particle size of the first recycled rubber after crushing should be in the range of 0.04 to 105.23 μm, which can reach the preset state, that is, the powder state, to meet the requirements of subsequent production of watch straps. Preferably, the particle size of the first recycled rubber in the preset state is 0.08 to 80.32 μm, which can better meet the requirements of subsequent production of watch straps.

[0076] In the exemplary embodiment provided by the present disclosure, fluororubber, a cross-linking reaction aid, a filler and a first recycled rubber material in a preset state are mixed according to preset mass fractions to obtain an initial rubber material, such as Figure 2 As shown, including:

[0077] S101: mixing fluororubber, a cross-linking reaction aid and a filler to obtain a first rubber compound.

[0078] In this step, 80 to 120 parts by mass of fluororubber, 1 to 5 parts by mass of a cross-linking reaction aid and 10 to 50 parts by mass of a filler are mixed. For example, 80 to 120 parts by mass of fluororubber, 1 to 5 parts by mass of a cross-linking reaction aid and 10 to 50 parts by mass of a filler can be added to an open mill and mixed so that the fluororubber, the cross-linking reaction aid and the filler are evenly mixed to obtain a first rubber compound.

[0079] S102: Mixing the first rubber material with the first recycled rubber material in a preset state to obtain an initial rubber material.

[0080] 5 to 50 parts by weight of the first recycled rubber in a preset state are added to the first rubber obtained in step S101 and mixed to obtain an initial rubber to be used in subsequent watch strap preparation.

[0081] In an exemplary embodiment provided by the present disclosure, mixing a first rubber compound and a first recycled rubber compound in a preset state includes: mixing the first rubber compound and the first recycled rubber compound in a preset state in an open mixing mill for a first preset number of times; wherein each mixing includes: performing a triangle bagging process for a second preset number of times, or performing a thin-pass process for a third preset length of time.

[0082] The first rubber material and the first recycled rubber material in a preset state are mixed in an open mill for a first preset number of times, so that the first rubber material and the first recycled rubber material in the preset state are evenly mixed to obtain an initial rubber material to be used for subsequent watch strap preparation. The mixing method includes triangle packing or thin pass processing. Triangle packing is the process of flattening the rubber material and then folding it in half. Through the second preset number of triangle packing processes, the first rubber material and the first recycled rubber material in the preset state can be evenly mixed; thin pass refers to the rubber material passing very thinly through the two rollers of the open mill. Through the third preset time of thin pass processing, the first rubber material and the first recycled rubber material in the preset state can be evenly mixed.

[0083] In the exemplary embodiment provided in the present disclosure, the first preset number of times is 3 to 6 times, the second preset number of times is 5 to 12 times, and the third preset duration is 3 to 7 minutes.

[0084] The first rubber material and the first recycled rubber material in a preset state are mixed in an open mixing mill for 3 to 6 times, i.e., through 5 to 12 times of triangle bagging treatment, or through 3 to 7 minutes of thin pass treatment, so that the first rubber material and the first recycled rubber material in a preset state can be mixed evenly to obtain an initial rubber material to be used for subsequent watch strap preparation.

[0085] In an exemplary embodiment provided in the present disclosure, a rubber material having a preset shape is subjected to oil pressure treatment under first preset conditions so that the rubber material having the preset shape undergoes a first vulcanization, including: heating and pressurizing the rubber material having the preset shape under first preset conditions so that 20 to 75% of the rubber material having the preset shape undergoes vulcanization.

[0086] A rubber material with a preset shape is placed in a mold, wherein the mold has the shape of the prepared watch strap, and the mold is heated and pressurized under first preset conditions, so that 20 to 75% of the rubber components in the rubber material with the preset shape undergo a chemical reaction under the conditions of heat and pressure, that is, vulcanization occurs, so that the rubber in the rubber material is cross-linked from linear macromolecules to three-dimensional network macromolecules, thereby forming a first vulcanized rubber material with excellent properties such as high strength, high elasticity, high wear resistance, and corrosion resistance, and the first vulcanized rubber material has initially possessed the shape of the prepared watch strap. Among them, 20 to 75% of the rubber components in the rubber are vulcanized, that is, incomplete vulcanization occurs, so that after the rubber is trimmed and removed after the first vulcanization, the second recycled rubber can be used as a raw material for preparing watch straps and used for the preparation of the next round of watch straps. In the vulcanization process of the next round of watch strap preparation, the second recycled rubber and the new fluororubber rubber form chemical bonds to crosslink, improve the bonding performance of the rubber, and minimize the performance reduction of the prepared watch strap due to differences in thermal expansion coefficients, mechanical properties, etc. between the rubbers. Otherwise, when the fully vulcanized rubber is used as a raw material to prepare the watch strap, there will be no or less chemical bonds between the fully vulcanized recycled rubber and the new fluororubber rubber. During the heat vulcanization process, the problem of weak interface bonding between the rubbers will occur due to the difference in thermal expansion coefficients, which will lead to reduced mechanical properties of the prepared watch strap, causing the watch strap to break or reduce the life of the watch strap.

[0087] In an exemplary embodiment provided in the present disclosure, the first preset condition includes: a first preset temperature of 150 to 190 degrees Celsius, and a first preset time of 50 to 150 seconds.

[0088] A rubber material having a preset shape is placed in a mold, wherein the mold has the shape of the prepared watch strap. The mold is heated at a first preset temperature of 150 to 190 degrees Celsius for a first preset time of 50 to 150 seconds, so that 20 to 75% of the rubber material having the preset shape can be vulcanized.

[0089] In an exemplary embodiment provided by the present disclosure, the preparation method further includes: vulcanizing the watch strap for a second time under a second preset condition to obtain the watch strap after the second vulcanization.

[0090] Vulcanizing the watch strap for the second time under the second preset conditions after the first vulcanization can improve the mechanical properties of the watch strap, so that the produced watch strap can better meet the user's usage and wearing needs.

[0091] In the exemplary embodiments provided in the present disclosure, in order to ensure the quality of the manufactured watch strap product, the watch strap can be trimmed, de-edged, and polished before and after the second vulcanization of the watch strap under the second preset conditions, so that the watch strap can better meet the appearance requirements.

[0092] In an exemplary embodiment provided by the present disclosure, vulcanizing the watch strap for a second time under the second preset conditions includes: heating the watch strap under the second preset conditions so that more than 95% of the rubber in the watch strap is vulcanized.

[0093] The watch strap that has undergone the first vulcanization is heated under the second preset conditions, so that more than 95% of the rubber in the watch strap is vulcanized, that is, it is infinitely close to complete vulcanization, which can improve the mechanical properties of the watch strap and make the prepared watch strap better meet the user's usage and wearing needs.

[0094] In the exemplary embodiment provided in the present disclosure, the second preset condition includes: the second preset temperature is 160 to 210 degrees Celsius, and the second preset time is 1.5 to 4 hours.

[0095] The watch strap after the first vulcanization is heated at a second preset temperature of 160 to 210 degrees Celsius for a second preset time of 1.5 to 4 hours, so that more than 95% of the rubber in the watch strap will be vulcanized, that is, infinitely close to complete vulcanization, so as to improve the mechanical properties of the watch strap, so that the produced watch strap can better meet the user's usage and wearing needs.

[0096] In order to more clearly explain the technical solution of the present disclosure, the watchband is prepared according to the method for preparing the watchband provided in the exemplary embodiment of the present disclosure. Some examples 1-3 of preparing the watchband are listed below.

[0097] Example 1

[0098] The hydraulic rubber waste generated in the previous round of watch strap preparation process is used as the first recycled rubber material, which is ground and crushed into a powder state with a particle size of 0.04 to 105.23 μm to obtain the first recycled rubber material in a preset state.

[0099] 80 parts by mass of fluororubber, 1 part by mass of a cross-linking reaction aid, and 10 parts by mass of a filler are mixed in an open mill to uniformly mix the fluororubber, the cross-linking reaction aid, and the filler to obtain a first rubber compound;

[0100] 5 parts by weight of the first recycled rubber in a preset state are added to the first rubber, and mixed in an open mill for 3 to 6 times to obtain an initial rubber; wherein each mixing includes 5 to 12 times of triangle bagging, or 3 to 7 minutes of thin pass treatment.

[0101] The initial rubber material is preformed by cutting or extruding through an extruder to obtain a rubber material with a preset shape.

[0102] A rubber material having a preset shape is placed in a mold, and the mold is heated at a first preset temperature of 190 degrees Celsius for a first preset time of 150 seconds, so that 75% of the rubber material having the preset shape is vulcanized to obtain a first vulcanized rubber material.

[0103] The first vulcanized rubber is trimmed or debonded to remove the hydraulic rubber waste formed by squeezing around the first vulcanized rubber shape, so that the first vulcanized rubber finally forms the shape of the strap. In addition, the trimmed hydraulic rubber waste is recycled to obtain the second recycled rubber, which is mechanically ground and crushed to form a powder state with a particle size of 0.04 to 105.23 μm, which can be used as a raw material for strap preparation and put into the next round of strap preparation process.

[0104] After the watch strap is shaped and polished, it is placed at a second preset temperature of 210 degrees Celsius and heated for a second preset time of 1.5 hours, so that more than 95% of the rubber in the watch strap is vulcanized, i.e., the second vulcanization. The watch strap after the second vulcanization is polished again to finally obtain the desired watch strap product.

[0105] Example 2

[0106] The hydraulic rubber waste generated in the previous round of watch strap preparation process is used as the first recycled rubber material, which is frozen with liquid nitrogen and then ground into a powder state with a particle size of 0.08 to 80.32 μm to obtain the first recycled rubber material in a preset state.

[0107] 100 parts by mass of fluororubber, 3 parts by mass of a cross-linking reaction aid and 50 parts by mass of a filler are mixed in an open mill to uniformly mix the fluororubber, the cross-linking reaction aid and the filler to obtain a first rubber compound;

[0108] 50 parts by weight of the first recycled rubber in a preset state are added to the first rubber, and mixed in an open mill for 3 to 6 times to obtain an initial rubber; wherein each mixing includes 5 to 12 times of triangle bagging, or 3 to 7 minutes of thin pass treatment.

[0109] The initial rubber material is preformed by cutting or extruding through an extruder to obtain a rubber material with a preset shape.

[0110] A rubber material having a preset shape is placed in a mold, and the mold is heated at a first preset temperature of 150 degrees Celsius for a first preset time of 50 seconds, so that 20% of the rubber material having the preset shape is vulcanized to obtain a first vulcanized rubber material.

[0111] The first vulcanized rubber is trimmed or debonded to remove the hydraulic rubber waste formed by squeezing around the first vulcanized rubber shape, so that the first vulcanized rubber finally forms the shape of the strap. In addition, the trimmed hydraulic rubber waste is recycled to obtain the second recycled rubber, which is then ground and pulverized by liquid nitrogen to form a powder with a particle size of 0.08 to 80.32 μm, which can be used as a raw material for the preparation of the strap to be put into the next round of the strap preparation process.

[0112] After the watch strap is shaped and polished, it is placed at a second preset temperature of 160 degrees Celsius and heated for a second preset time of 4 hours, so that more than 95% of the rubber in the watch strap is vulcanized, i.e., the second vulcanization. The watch strap after the second vulcanization is polished again to finally obtain the desired watch strap product.

[0113] Example 3

[0114] The hydraulic rubber waste generated in the previous round of watch strap preparation process is used as the first recycled rubber material. After being frozen with liquid nitrogen, it is ground and crushed into a powder state with a particle size of 30.28 to 58.95 μm to obtain the first recycled rubber material in a preset state.

[0115] Mixing 90 to 100 parts by weight of fluororubber, 2 to 4 parts by weight of a crosslinking reaction aid and 35 parts by weight of a filler in an open mill to uniformly mix the fluororubber, the crosslinking reaction aid and the filler to obtain a first rubber compound;

[0116] 37 parts by weight of the first recycled rubber material in a preset state is added to the first rubber material, and mixed in an open mill for 3 to 6 times to obtain an initial rubber material; wherein each mixing includes 5 to 12 times of triangle bagging, or 3 to 7 minutes of thin pass treatment.

[0117] The initial rubber material is preformed by cutting or extruding through an extruder to obtain a rubber material with a preset shape.

[0118] A rubber material having a preset shape is placed in a mold, and the mold is heated at a first preset temperature of 160 degrees Celsius for a first preset time of 85 seconds, so that 54% of the rubber material having the preset shape is vulcanized to obtain a first vulcanized rubber material.

[0119] The first vulcanized rubber is trimmed or debonded to remove the hydraulic rubber waste formed by squeezing around the first vulcanized rubber shape, so that the first vulcanized rubber finally forms the shape of the strap. In addition, the trimmed hydraulic rubber waste is recycled to obtain the second recycled rubber, which is ground and pulverized by liquid nitrogen to form a powder with a particle size of 30.28 to 58.95 μm, which can be used as a raw material for the preparation of the strap to be put into the next round of the strap preparation process.

[0120] After the watch strap is shaped and polished, it is placed at a second preset temperature of 190 degrees Celsius and heated for a second preset time of 3 hours, so that more than 95% of the rubber in the watch strap is vulcanized, i.e., the second vulcanization. The watch strap after the second vulcanization is polished again to finally obtain the desired watch strap product.

[0121] The exemplary embodiment of the present disclosure provides a watchband, which is manufactured according to the above-mentioned method for manufacturing the watchband. The watchband manufactured according to the above-mentioned method for manufacturing the watchband has excellent performance, can be widely used in smart wearable products, and can meet the use and wearing needs of users.

[0122] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of the present disclosure, rather than to limit them. Although the present disclosure has been described in detail with reference to the above embodiments, a person skilled in the art should understand that the technical solutions described in the above embodiments can still be modified, or some of the technical features can be replaced by equivalents; and these modifications or replacements do not deviate the essence of the corresponding technical solutions from the spirit and scope of the technical solutions of the embodiments of the present disclosure.

Claims

1. A method for preparing a watch strap, characterized in that: The preparation method comprises: Mixing the fluororubber, the cross-linking reaction aid, the filler and the first recycled rubber material in a preset state according to preset weight fractions to obtain an initial rubber material; The initial rubber material is subjected to preforming treatment to obtain a rubber material having a preset shape; The rubber material with the preset shape is subjected to oil pressure treatment under the first preset condition, so that the rubber material with the preset shape is first vulcanized to obtain the first vulcanized rubber material; The first vulcanized rubber material is trimmed to obtain the watch strap and the second recycled rubber material.

2. The method for preparing a watch strap according to claim 1, characterized in that: The preset mass fractions include:

3. The method for preparing a watch strap according to claim 1, characterized in that: The step of subjecting the rubber material having a preset shape to an oil pressure treatment under a first preset condition so that the rubber material having a preset shape undergoes a first vulcanization comprises: The rubber material with the preset shape is heated and pressurized under the first preset condition, so that 20 to 75% of the rubber material with the preset shape is vulcanized.

4. The method for preparing a watch strap according to claim 3, characterized in that: The first preset condition includes: The first preset temperature is 150 to 190 degrees Celsius, and the first preset time is 50 to 150 seconds.

5. The method for preparing a watch strap according to claim 1, characterized in that: The preset state is a powder state; the preparation method further comprises: The first recycled rubber material is crushed into a powder state.

6. The method for preparing a watch strap according to claim 5, characterized in that: The first recycled rubber material is crushed into powder, including one or more of the following methods: Crushing the first recycled rubber material into the powder state by mechanical grinding; The first recycled rubber material is frozen with liquid nitrogen and then ground into the powder state.

7. The method for preparing a watch strap according to claim 5 or 6, characterized in that: The particle size of the first recycled rubber material under a preset state is 0.04-105.23 μm.

8. The method for preparing a watch strap according to claim 2, characterized in that: The fluororubber, the cross-linking reaction aid, the filler and the first recycled rubber material in a preset state are mixed according to preset weight fractions to obtain an initial rubber material, including: Mixing the fluororubber, the cross-linking reaction aid and the filler to obtain a first rubber compound; The first rubber material and the first recycled rubber material in a preset state are mixed to obtain the initial rubber material.

9. The method for preparing a watch strap according to claim 8, characterized in that: Mixing the first rubber material with the first recycled rubber material in a preset state comprises: The first rubber material and the first recycled rubber material in a preset state are mixed in an open mill for a first preset number of times; wherein each mixing includes: Perform the triangle packing process for a second preset number of times, or perform the thin pass process for a third preset duration.

10. The method for preparing a watch strap according to claim 9, characterized in that: The first preset number of times is 3 to 6 times, the second preset number of times is 5 to 12 times, and the third preset duration is 3 to 7 minutes.

11. The method for preparing a watch strap according to claim 1, characterized in that: The preparation method further comprises: The watch strap is vulcanized for a second time under a second preset condition to obtain a watch strap after the second vulcanization.

12. The method for preparing a watch strap according to claim 11, characterized in that: The second vulcanization of the strap under the second preset condition comprises: The watch strap is heated under a second preset condition so that more than 95% of the rubber in the watch strap is vulcanized.

13. The method for preparing a watch strap according to claim 12, characterized in that: The second preset condition includes: The second preset temperature is 160 to 210 degrees Celsius, and the second preset time is 1.5 to 4 hours.

14. The method for preparing a watch strap according to claim 1, characterized in that: The fluororubber includes one or more of the following: Type 23 fluororubber, type 24 fluororubber, type 26 fluororubber, type 46 fluororubber and type 246 fluororubber.

15. The method for preparing a watch strap according to claim 1, characterized in that: The cross-linking reaction aid includes one or more of the following: Peroxide crosslinking agents, bisphenol crosslinking agents, amine crosslinking agents, platinum crosslinking agents and TAIC crosslinking agents.

16. The method for preparing a watch strap according to claim 1, characterized in that: The filler includes one or more of the following: Carbon black, white carbon, diatomaceous earth, talc, calcium silicate, calcium carbonate, barium sulfate, magnesium carbonate, and zinc oxide.

17. A watch strap, characterized in that: The watch strap is made according to the watch strap preparation method according to any one of claims 1-16.

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