Silver reinforced composite material as well as preparation method and application thereof

Abstract

The invention relates to a silver reinforced composite material as well as a preparation method and application thereof. The silver reinforced composite material is of a sandwich structure, the surface layer is a silver composite layer, the middle layer is polyester fiber mesh cloth, and the bottom layer is a PVC film; the silver composite layer is of a double-layer structure, the upper layer is a pearl layer containing pearl powder, the lower layer is a silver powder layer containing silver powder, the size of the silver powder is 18-25 microns, and the particle size of the pearl powder is smaller than or equal to 15 microns; in the pearlescent layer, the mass ratio of the PVC resin to the pearl powder is 100: (0.5-2); in the silver powder layer, the mass ratio of the PVC resin to the silver powder is 100: (8-15). Different from the prior art, the pearly luster layer containing the pearl powder covers the silver powder layer containing the silver powder, most of the silver powder is limited in the silver powder layer, and the silver luster of the material is improved through the reflection and refraction performance of the pearl powder.

Description

Technical Field

[0001] This invention relates to the field of materials, and in particular to silver reinforced composite materials, silver reinforced space composite materials, and their preparation methods. Background Technology

[0002] The existing silver-reinforced composite material structure consists of a silver film layer, a polyester fiber mesh layer, and a conventional film layer, with the silver film layer directly exposed. Silver powder is added to the silver film layer; however, the large particle size of the silver powder leads to poor compatibility with PVC resin, resulting in poor dispersion during processing. This causes silver powder to precipitate on the material surface when the silver-reinforced spatial composite material is subsequently manufactured using traditional structural designs and processes, resulting in low production yield and numerous surface spots and air bubbles on the finished product, severely impacting its aesthetics, durability, and market acceptance. Summary of the Invention

[0003] In view of the above problems, this application provides silver reinforced composite materials, silver reinforced spatial composite materials and their preparation methods, which solve the problem of silver powder precipitation on the material surface and improve the silver luster of the material.

[0004] The first aspect of this application provides a silver reinforced composite material, which is a sandwich structure comprising a first surface layer, a first intermediate layer, and a first bottom layer; the first surface layer is a silver composite layer, the first intermediate layer is a polyester fiber mesh, and the first bottom layer is a PVC film; the silver composite layer is a double-layer structure, with the upper layer being a pearlescent layer containing pearlescent powder and the lower layer being a silver powder layer containing silver powder; the size of the silver powder is 18-25μm, and the particle size of the pearlescent powder is ≤15μm; in the pearlescent layer, the mass ratio of PVC resin to pearlescent powder is 100:0.5-2; in the silver powder layer, the mass ratio of PVC resin to silver powder is 100:8-15.

[0005] Pearlescent powder has strong surface polarity, small particle size, and large specific surface area, allowing it to quickly bind with PVC molecular chains and exhibiting good dispersibility in PVC resin. In contrast, silver powder, due to its inorganic nature and large particle size, has poorer compatibility with PVC resin than pearlescent powder, making it difficult for silver powder to penetrate the pearlescent layer. Furthermore, because pearlescent powder has a plate-like structure, it forms a layered network in the molten state of PVC, occupying a large amount of physical space, which also physically blocks the migration channels of silver powder in the pearlescent layer, making it difficult for it to migrate into the pearlescent layer.

[0006] In summary, the pearlescent layer blocks the silver powder in the silver powder layer, reducing its migration during hot pressing and ensuring the silver powder content in the silver powder layer, thus guaranteeing the silver luster effect. Because pearlescent powder has reflective and refractive effects, it can also enhance the silver color of the material surface and increase its texture. Controlling the ratio of pearlescent powder, silver powder, and PVC resin ensures a silver luster effect while reducing silver powder migration and precipitation.

[0007] Unlike existing technologies, the above technical solution provides a silver reinforced composite material. By covering a silver powder layer with a pearlescent layer containing pearlescent powder, most of the silver powder is confined within the silver powder layer, ensuring the silver luster effect of the silver powder layer. Furthermore, the silver luster of the material is enhanced through the reflective and refractive properties of the pearlescent powder.

[0008] Furthermore, the pearlescent layer has a thickness of 0.08-0.15 mm and comprises the following components by weight: 100 parts by weight of PVC resin with a degree of polymerization of 1300-1500; 40-45 parts by weight of plasticizer; 8-10 parts by weight of cold-resistant agent; 2.5-3.0 parts by weight of liquid barium zinc stabilizer; 0.2-0.4 parts by weight of UV absorber; 0.1-0.2 parts by weight of composite antioxidant; and 0.5-2 parts by weight of pearlescent powder.

[0009] Furthermore, the thickness of the silver powder layer is 0.25-0.30 mm, comprising the following components by weight: 100 parts by weight of PVC resin with a degree of polymerization of 1300-1500, 40-48 parts by weight of plasticizer, 5-8 parts by weight of cold resistant agent, 2-2.5 parts by weight of liquid barium zinc stabilizer, and 8-15 parts by weight of silver powder.

[0010] Furthermore, the PVC film has a thickness of 0.20-0.25 mm and comprises the following components in parts by weight: 100 parts by weight of PVC resin with a degree of polymerization of 1300-1500, 45-50 parts by weight of plasticizer, 8-10 parts by weight of cold resistant agent, and 2.0-2.5 parts by weight of liquid barium zinc stabilizer.

[0011] Furthermore, the plasticizer is DINP or DOTP; the cold-resistant agent is DOA; and the UV absorber is UV-531.

[0012] Furthermore, the pearlescent layer, silver powder layer, and PVC film are prepared using a calendering process.

[0013] The second aspect of this application provides a method for preparing the silver reinforced composite material described in the first aspect of this application, comprising the following steps:

[0014] S1: After preheating the pearlescent layer and the silver powder layer at 100-120℃ respectively, they are laminated at 140-150℃ using a laminating machine to obtain a silver composite layer.

[0015] S2: The silver composite layer, polyester fiber mesh, and PVC film are laminated at a high temperature of 178-185℃ using a large roller to obtain the silver reinforced composite material.

[0016] Due to the poor compatibility between silver powder and PVC resin, it is prone to precipitate and adhere to the rollers during high-temperature lamination with large rollers. Therefore, step S1 uses a laminating machine at a lower temperature of 140-150℃ to prepare the silver composite layer. As long as the pearlescent layer and the silver powder layer have a certain degree of adhesion, the peel strength is 10-20 N / 3cm. Step S2 involves high-temperature lamination of the PVC in each layer, and the migration of silver powder mainly occurs in this stage. The peel strength after lamination is greater than 60 N / 3cm.

[0017] Furthermore, in step S2, the polyester fiber mesh is ironed at 80-90°C before high-temperature lamination, coated with PVC paste, and dried at 160-170°C. The surface layer and the bottom layer are preheated at 150-160°C before pressing.

[0018] The preheating step can avoid the violent movement of PVC molecular chains caused by direct high-temperature hot pressing, and reduce the migration and precipitation of pearlescent powder and silver powder.

[0019] A third aspect of this application provides a silver-reinforced spatial composite material, which is a sandwich structure comprising a second surface layer, a second intermediate layer, and a second bottom layer. The second surface layer and the second bottom layer are the silver-reinforced composite material described in the first aspect of this application, and the second intermediate layer is a spatial mesh fabric. The silver-reinforced spatial composite material is obtained by pressing the second surface layer, the second intermediate layer, and the second bottom layer at a high temperature, with a bonding temperature of 173-182℃ and a pressure of 25-35 kg / m². 2 .

[0020] Furthermore, the space mesh is coated with PVC paste on both sides and preheated at 160-170℃ before pressing, and the silver reinforced composite material is preheated at 145-160℃ before pressing.

[0021] Because the content of pearlescent powder is controlled, although the PVC molecular chains will break and recombine under hot pressing, the pearlescent powder will not be released or will only be released in small amounts. The silver powder will also migrate under hot pressing conditions, but due to the restriction of migration by the pearlescent powder and the pearlescent layer, only a small amount of migration and precipitation will occur, which will not affect its silver luster.

[0022] The above description of the invention is merely an overview of the technical solution of this application. In order to enable those skilled in the art to better understand the technical solution of this application and to implement it based on the textual description, and to make the above-mentioned objectives and other objectives, features and advantages of this application easier to understand, the following description is provided in conjunction with the specific embodiments and accompanying drawings of this application. Attached Figure Description

[0023] The accompanying drawings are only used to illustrate the principles, implementation methods, applications, features, and effects of specific embodiments of this application and other related content, and should not be considered as limitations on this application.

[0024] In the accompanying drawings of the instruction manual:

[0025] Figure 1 This is a comparative schematic diagram of the existing structure of silver reinforced composite material and the structure of this application. Detailed Implementation

[0026] To illustrate the possible application scenarios, technical principles, implementable specific solutions, and achievable objectives and effects of this application in detail, the following description, in conjunction with the listed specific embodiments and accompanying drawings, provides a detailed explanation. The embodiments described herein are merely illustrative of the technical solutions of this application and are therefore intended only as examples, not as limiting the scope of protection of this application.

[0027] In this document, the term "embodiment" means that a specific feature, structure, or characteristic described in connection with an embodiment may be included in at least one embodiment of this application. The term "embodiment" appearing in various places throughout the specification does not necessarily refer to the same embodiment, nor does it specifically limit its independence or connection with other embodiments. In principle, in this application, as long as there are no technical contradictions or conflicts, the technical features mentioned in each embodiment can be combined in any way to form corresponding implementable technical solutions.

[0028] Unless otherwise defined, the technical terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this application pertains; the use of related terms herein is merely for the purpose of describing particular embodiments and is not intended to limit this application.

[0029] In the description of this application, the term "and / or" is used to describe the logical relationship between objects, indicating that three relationships can exist. For example, A and / or B means: A exists, B exists, and A and B exist simultaneously. Additionally, the character " / " in this document generally indicates that the preceding and following objects have an "or" logical relationship.

[0030] In this application, terms such as “first” and “second” are used only to distinguish one entity or operation from another, and do not necessarily require or imply any actual quantity, hierarchy or order between these entities or operations.

[0031] Unless otherwise specified, the use of terms such as “comprising,” “including,” “having,” or other similar expressions in this application is intended to cover non-exclusive inclusion, which does not exclude the presence of additional elements in a process, method, or product that includes the stated elements, such that a process, method, or product that includes a list of elements may include not only those defined elements but also other elements not expressly listed, or elements inherent to such a process, method, or product.

[0032] As understood in the Examination Guidelines, in this application, expressions such as "greater than," "less than," and "exceeding" are understood to exclude the stated number; expressions such as "above," "below," and "within" are understood to include the stated number. Furthermore, in the description of the embodiments in this application, "multiple" means two or more (including two), and similar expressions related to "multiple" are also understood in this way, such as "multiple groups" and "multiple times," unless otherwise explicitly specified.

[0033] The pearlescent powder described in this embodiment is a mica-based pearlescent powder. The mica flakes are coated with TiO2 / SnO2, which are flaky inorganic particles with strong surface polarity, and have a certain degree of compatibility with the polarity of PVC.

[0034] The silver powder described in this embodiment has a non-polar surface (metallic bonds are non-polar), which is very different from the polarity of PVC. It has poor dispersibility in PVC and is easy to precipitate.

[0035] The first aspect of this application provides a silver reinforced composite material, which is a sandwich structure comprising a first surface layer, a first intermediate layer, and a first bottom layer; the first surface layer is a silver composite layer, the first intermediate layer is a polyester fiber mesh, and the first bottom layer is a PVC film; the silver composite layer is a double-layer structure, with the upper layer being a pearlescent layer containing pearlescent powder and the lower layer being a silver powder layer containing silver powder; the size of the silver powder is 18-25μm, and the particle size of the pearlescent powder is ≤15μm; in the pearlescent layer, the mass ratio of PVC resin to pearlescent powder is 100:0.5-2; in the silver powder layer, the mass ratio of PVC resin to silver powder is 100:8-15.

[0036] Pearlescent powder has strong surface polarity, small particle size, and large specific surface area, allowing it to quickly bind with PVC molecular chains and exhibiting good dispersibility in PVC resin. In contrast, silver powder, due to its inorganic nature and large particle size, has poorer compatibility with PVC resin than pearlescent powder, making it difficult for silver powder to penetrate the pearlescent layer. Furthermore, because pearlescent powder has a plate-like structure, it forms a layered network in the molten state of PVC, occupying a large amount of physical space, which also physically blocks the migration channels of silver powder in the pearlescent layer, making it difficult for it to migrate into the pearlescent layer.

[0037] In summary, the pearlescent layer blocks the silver powder in the silver powder layer, reducing its migration during processing and ensuring the silver powder content in the silver powder layer. This forms a complete silver film, guaranteeing the material's silver luster effect, with only a small amount of silver powder migrating into the pearlescent layer. Because pearlescent powder has reflective and refractive effects, it can also enhance the silver color of the material surface and increase its texture. Controlling the ratio of pearlescent powder, silver powder, and PVC resin ensures a silver luster effect while controlling costs and reducing silver powder migration and precipitation.

[0038] Unlike existing technologies, the above technical solution provides a silver reinforced composite material. By covering a silver powder layer with a pearlescent layer containing pearlescent powder, most of the silver powder is confined within the silver powder layer to form a complete silver film. Furthermore, the reflective and refractive properties of the pearlescent powder enhance the silver luster of the material.

[0039] Furthermore, the pearlescent layer has a thickness of 0.08-0.15 mm and comprises the following components by weight: 100 parts by weight of PVC resin with a degree of polymerization of 1300-1500; 40-45 parts by weight of plasticizer; 8-10 parts by weight of cold-resistant agent; 2.5-3.0 parts by weight of liquid barium zinc stabilizer; 0.2-0.4 parts by weight of UV absorber; 0.1-0.2 parts by weight of composite antioxidant; and 0.5-2 parts by weight of pearlescent powder.

[0040] Furthermore, the thickness of the silver powder layer is 0.25-0.30 mm, comprising the following components by weight: 100 parts by weight of PVC resin with a degree of polymerization of 1300-1500, 40-48 parts by weight of plasticizer, 5-8 parts by weight of cold resistant agent, 2-2.5 parts by weight of liquid barium zinc stabilizer, and 8-15 parts by weight of silver powder.

[0041] Furthermore, the PVC film has a thickness of 0.20-0.25 mm and comprises the following components in parts by weight: 100 parts by weight of PVC resin with a degree of polymerization of 1300-1500, 45-50 parts by weight of plasticizer, 8-10 parts by weight of cold resistant agent, and 2.0-2.5 parts by weight of liquid barium zinc stabilizer.

[0042] The degree of polymerization of PVC resin in the silver powder layer and pearlescent layer is 1300-1500. A higher degree of polymerization results in longer molecular chains, more entanglement points, and better tensile strength, tear strength, abrasion resistance, and toughness. However, it also leads to severe molecular chain entanglement, high flow resistance in the molten state, very high viscosity, and poor flowability. This creates difficulties in injection molding, extrusion, and other processing methods, requiring higher temperatures and pressures. Considering both product performance and processing performance, the degree of polymerization of PVC resin is set to 1300-1500.

[0043] Furthermore, the PVC film has a thickness of 0.20-0.25 mm and comprises the following components in parts by weight: 100 parts by weight of PVC resin with a degree of polymerization of 1300-1500, 45-50 parts by weight of plasticizer, 8-10 parts by weight of cold resistant agent, and 2.0-2.5 parts by weight of liquid barium zinc stabilizer.

[0044] Furthermore, the plasticizer is DINP or DOTP; the cold-resistant agent is DOA; and the UV absorber is UV-531.

[0045] DINP stands for diisononyl phthalate; DOTP stands for dioctyl terephthalate; DOA stands for dioctyl adipate.

[0046] Furthermore, the pearlescent layer, silver powder layer, and PVC film are prepared using a calendering process.

[0047] The second aspect of this application provides a method for preparing the silver reinforced composite material described in the first aspect of this application, comprising the following steps:

[0048] S1: After preheating the pearlescent layer and the silver powder layer at 100-120℃ respectively, they are laminated at 140-150℃ using a laminating machine to obtain a silver composite layer.

[0049] S2: The silver composite layer, polyester fiber mesh, and PVC film are laminated at a high temperature of 175-185℃ using a large roller to obtain the silver reinforced composite material.

[0050] Due to the poor compatibility between silver powder and PVC resin, it is prone to precipitate and adhere to the rollers during high-temperature lamination with large rollers. Therefore, step S1 uses a laminating machine at a lower temperature of 140-150℃ to prepare the silver composite layer. As long as the pearlescent layer and the silver powder layer have a certain degree of adhesion, the peel strength is 10-20 N / 3cm. Step S2 involves high-temperature lamination of the PVC in each layer, and the migration of silver powder mainly occurs in this stage. The peel strength after lamination is greater than 60 N / 3cm.

[0051] Furthermore, in step S2, the polyester fiber mesh is ironed at 80-90°C before high-temperature lamination, coated with PVC paste, and dried at 160-170°C. The silver composite layer and the PVC film are preheated at 150-160°C before pressing.

[0052] A third aspect of this application provides a silver-reinforced spatial composite material, which is a sandwich structure comprising a second surface layer, a second intermediate layer, and a second bottom layer. The second surface layer and the second bottom layer are the silver-reinforced composite material described in the first aspect of this application, and the second intermediate layer is a spatial mesh fabric. The silver-reinforced spatial composite material is obtained by pressing the second surface layer, the second intermediate layer, and the second bottom layer at a high temperature, with a bonding temperature of 173-182℃ and a pressure of 25-35 kg / m². 2 .

[0053] Furthermore, the space mesh is coated with PVC paste on both sides and preheated at 160-170℃ before pressing, and the silver reinforced composite material is preheated at 145-160℃ before pressing.

[0054] Unlike existing technologies, the silver-reinforced spatial composite material in the above technical solution has a beautiful surface color and a bright silver luster; due to the protection of the silver powder layer, the material's migration resistance is enhanced.

[0055] In this embodiment, the pearlescent layer is prepared using a calendering method, specifically including the following steps: weighing the components according to the pearlescent layer formula, mixing them evenly using a high-speed mixer, and processing them using a calender to obtain the pearlescent layer. Pearlescent powder is added from the high-speed mixer; the strong shearing action of the high-speed mixer further breaks down the pearlescent powder particles, allowing them to be evenly dispersed in the PVC. Smaller pearlescent powder particle sizes allow for better dispersion in the film, improving the color and pearlescent texture of the material surface.

[0056] In this embodiment, the silver powder layer is prepared by calendering, specifically including the following steps: weighing the components according to the silver powder layer formula, mixing them evenly in an internal mixer, and processing them in a calender to obtain the silver powder layer. Because the silver powder is evenly dispersed into the film through the internal mixer, the silver powder has good dispersibility in PVC, while reducing damage to the silver powder and better preserving the silver effect.

[0057] In this embodiment, the PVC film is prepared by calendering, specifically including the following steps: weighing the components according to the PVC film formula, mixing them evenly with a mixer, and processing them with a calender to obtain the PVC film.

[0058] In this embodiment, the PVC resin is SG2; the plasticizer is DINP; the cold-resistant agent is DOA; the liquid barium zinc stabilizer is LZB-6170; the UV absorber is UV-531; the composite antioxidant is 330; the pearlescent powder is AK-110 pearlescent powder with a particle size of 1-15μm; and the silver powder is 8880 silver powder with a particle size of 18-25μm.

[0059] Example 1

[0060] 1. Preparation of pearlescent layer: Weigh 100 parts by weight of PVC resin; 40 parts by weight of plasticizer; 8 parts by weight of cold resistant agent; 2.5 parts by weight of liquid barium zinc stabilizer; 0.2 parts by weight of UV absorber; 0.1 parts by weight of composite antioxidant; and 0.5 parts by weight of pearlescent powder. Mix the above raw materials evenly with a high-speed mixer and process with a calender to obtain a pearlescent layer with a thickness of 0.1 mm.

[0061] 2. Preparation of silver powder layer: Weigh 100 parts by weight of PVC resin, 40 parts by weight of plasticizer, 5 parts by weight of cold resistant agent, 2 parts by weight of liquid barium zinc stabilizer, and 8 parts by weight of silver powder; mix the above raw materials evenly in an internal mixer and process them in a calender to obtain a silver powder layer with a thickness of 0.25 mm.

[0062] 3. Preparation of PVC film: Weigh 100 parts by weight of PVC resin, 45 parts by weight of plasticizer, 8 parts by weight of cold resistant agent, and 2.0 parts by weight of liquid barium zinc stabilizer. After mixing the above raw materials evenly by stirring, process them by calendering to obtain a PVC film with a thickness of 0.20 mm.

[0063] 4. Preparation of the silver composite layer: After preheating the pearlescent layer and the silver powder layer separately at 100-120℃, they are laminated at 140-150℃ using a laminating machine to obtain the silver composite layer; its structure is as follows. Figure 1 As shown in the structure of this application, the peel strength of the silver composite layer is 10–20 N / 3 cm;

[0064] 5. Preparation of Silver Reinforced Composite Material: The silver composite layer, high-strength polyester fiber mesh, and PVC film are laminated at a high temperature of 175-185℃ using a large roller to obtain the silver reinforced composite material. The peel strength of the silver reinforced composite material is greater than 60 N / 3 cm. The silver composite layer and PVC film are preheated at 148-153℃ before pressing; the high-strength polyester fiber mesh is ironed at 80-90℃, coated with PVC paste, and dried at 160-170℃ before pressing.

[0065] 6. Preparation of silver-reinforced space composite material: Silver-reinforced composite material, intermediate space mesh, and silver...

[0066] The colored reinforced composite material is bonded at high temperature on a large roller and then cooled to obtain a sandwich-structured pearlescent silver reinforced spatial composite material. The bonding temperature is 175-182℃, and the pressing pressure is 25-35 kg / m. 2 Before pressing, the space mesh is ironed flat at 90-110℃, coated with PVC paste (130±20gsm of paste on one side), and dried and preheated in an oven at 170-185℃.

[0067] Example 2

[0068] The difference between Example 2 and Example 1 is that the formulations of the pearlescent layer, silver powder layer, and PVC film are different.

[0069] Pearl layer formula: 100 parts by weight of PVC resin; 48 parts by weight of plasticizer; 10 parts by weight of cold resistant agent; 3.0 parts by weight of liquid barium zinc stabilizer; 0.4 parts by weight of UV absorber; 0.2 parts by weight of composite antioxidant; 2 parts by weight of pearl powder.

[0070] The formula for the silver powder layer is as follows: PVC resin: 100 parts by weight, plasticizer: 40 parts by weight, cold resistant agent: 8 parts by weight, liquid barium zinc stabilizer: 2.5 parts by weight, and silver powder: 15 parts by weight.

[0071] The formula for PVC film is as follows: PVC resin: 100 parts by weight, plasticizer: 45 parts by weight, cold resistant agent: 8 parts by weight, liquid barium zinc stabilizer: 2.0 parts by weight. After being mixed evenly by stirring, the film is processed by calendering to obtain PVC film.

[0072] Example 3

[0073] The difference between Example 3 and Example 1 is that the PVC film formulation is different.

[0074] PVC film formulation: PVC resin: 100 parts by weight, plasticizer: 50 parts by weight, cold resistant agent: 10 parts by weight, liquid barium zinc stabilizer: 2.5 parts by weight.

[0075] Comparative Example 1

[0076] The difference between Comparative Example 1 and Example 1 is that the pearlescent layer is replaced with a PVC resin layer of the same thickness.

[0077] 1. Preparation of PVC resin layer: Weigh 100 parts by weight of PVC resin; 40 parts by weight of plasticizer; 8 parts by weight of cold resistant agent; 2.5 parts by weight of liquid barium zinc stabilizer; 0.2 parts by weight of UV absorber; 0.1 parts by weight of composite antioxidant; mix evenly with a high-speed mixer and process with a calender to obtain a PVC resin layer with a thickness of 0.1 mm.

[0078] 2. Preparation of silver powder layer: Weigh 100 parts by weight of PVC resin with a degree of polymerization of 1300, 35 parts by weight of plasticizer, 5 parts by weight of cold resistant agent, 2 parts by weight of liquid barium zinc stabilizer, and 8 parts by weight of silver powder; mix evenly in an internal mixer and process in a calender to obtain a silver powder layer with a thickness of 0.25 mm.

[0079] 3. Preparation of PVC film: Weigh 100 parts by weight of PVC resin, 45 parts by weight of plasticizer, 8 parts by weight of cold resistant agent, and 2.0 parts by weight of liquid barium zinc stabilizer. After mixing evenly by stirring, process with a calender to obtain a PVC film with a thickness of 0.20 mm.

[0080] 4. Preparation of silver composite layer: After preheating the PVC resin layer and the silver powder layer at 100-120℃, they are laminated together by a laminating machine at 140-150℃ to obtain the silver composite layer.

[0081] 5. Preparation of the silver reinforced composite material: The silver composite layer, high-strength polyester fiber mesh, and PVC film are laminated at a high temperature of 178-185℃ using a large roller to obtain the silver reinforced composite material. The high-strength polyester fiber mesh is ironed at 80-90℃ before pressing, coated with PVC paste, and dried at 160-170℃. The silver composite layer and PVC film are preheated at 148-153℃ before pressing; the high-strength polyester fiber mesh is ironed at 80-90℃ before pressing, coated with PVC paste, and dried at 160-170℃.

[0082] 6. Preparation of Silver Reinforced Spatial Composite Material: Silver reinforced composite material, intermediate spatial mesh fabric, and silver reinforced composite material are bonded together at high temperature on a large roller, and then cooled to obtain a sandwich-structured silver reinforced spatial composite material. The pressing temperature is 165-182℃, and the pressure is 25-35 kg / m². 2 Before pressing, the space mesh is ironed flat at 90-110℃, coated with PVC paste (130±20gsm of paste on one side), and dried and preheated in an oven at 170-185℃.

[0083] Comparative Example 2

[0084] 1. Preparation of silver powder layer: Weigh 100 parts by weight of PVC resin, 35 parts by weight of plasticizer, 5 parts by weight of cold resistant agent, 2 parts by weight of liquid barium zinc stabilizer, and 8 parts by weight of silver powder; mix evenly in an internal mixer and process in a calender to obtain a silver powder layer with a thickness of 0.25 mm.

[0085] 2. Preparation of PVC film: Weigh 100 parts by weight of PVC resin, 45 parts by weight of plasticizer, 8 parts by weight of cold resistant agent, and 2.0 parts by weight of liquid barium zinc stabilizer. After mixing evenly by stirring, process with a calender to obtain a PVC film with a thickness of 0.20 mm.

[0086] 3. Preparation of silver reinforced composite material: The silver powder layer, high-strength polyester fiber mesh, and PVC film are laminated at a high temperature of 178-185℃ using a large roller to obtain the silver reinforced composite material, the structure of which is as follows. Figure 1 The existing structure is shown in the figure. The silver powder layer and PVC film are preheated at 148-153°C before pressing; the high-strength polyester fiber mesh is ironed at 80-90°C, coated with PVC paste, and dried at 160-170°C before pressing.

[0087] 4. Preparation of Silver Reinforced Spatial Composite Material: Silver reinforced composite material, intermediate spatial mesh fabric, and silver reinforced composite material are bonded together at high temperature on a large roller, followed by cooling to obtain a sandwich-structured silver reinforced spatial composite material. The bonding temperature is 175-182℃, and the pressing pressure is 25-35 kg / m². 2 Before pressing, the space mesh is ironed flat at 90-110℃, coated with PVC paste (130±20gsm of paste on one side), and dried and preheated in an oven at 170-185℃ to obtain a silver reinforced space composite material.

[0088] Process and result testing:

[0089] The silver reinforced composite materials prepared in Examples 1-3 and Comparative Examples 1-2 were subjected to performance tests. The test results are shown in Table 1. The test items and methods are as follows:

[0090] 1. Surface spots on the roller: Inspection method: Visual inspection of the roller.

[0091] 2. Silvery luster; testing method: visual inspection of the material.

[0092] 3. Migration resistance test method: Place the silver reinforced composite material between two layers of white PVC film, press it at 80℃ and 5MPa for 24 hours, then wipe the white PVC film with a white cloth and observe whether the cloth surface is contaminated.

[0093] Table 1 Test Results

[0094]

[0095] As can be seen from Table 1, the silver reinforced composite materials prepared in Examples 1-3 did not exhibit any mottled appearance on the roller surface during the production process. The silver reinforced composite materials also exhibited excellent silver luster and a pearlescent effect.

[0096] Although there were no silver stains on the fabric surface in Comparative Example 1, the silver luster was reduced. This was because during the bonding process between the silver composite layer and the high-strength polyester fiber mesh, some silver powder migrated into the PVC film due to the heat and pressure applied during bonding, resulting in a decrease in the silver powder density of the silver powder layer.

[0097] In contrast to the silver reinforced composite material of Comparative Example 2, a large number of obvious mottles appeared on the surface of the rollers during the production process, indicating that a large amount of silver powder migrated and precipitated on the material surface under hot pressing.

[0098] After adopting the technical solution of this application for large-scale production, according to actual production data, the pass rate of silver reinforced space composite material has increased to over 95%, while the pass rate of the original technology is less than 50%, and the market acceptance is poor.

[0099] Finally, it should be noted that although the above embodiments have been described in the text and drawings of this application, this should not limit the scope of patent protection of this application. Any technical solutions that are based on the essential concept of this application and utilize the content described in the text and drawings of this application, resulting in equivalent structural or procedural substitutions or modifications, as well as the direct or indirect application of the technical solutions of the above embodiments to other related technical fields, are all included within the scope of patent protection of this application.

Claims

1. A silver reinforced composite material, characterized in that, The silver reinforced composite material has a sandwich structure comprising a first surface layer, a first intermediate layer, and a first bottom layer; the first surface layer is a silver composite layer, the first intermediate layer is a polyester fiber mesh, and the first bottom layer is a PVC film; the silver composite layer has a double-layer structure, with the upper layer being a pearlescent layer containing pearlescent powder and the lower layer being a silver powder layer containing silver powder; the size of the silver powder is 18-25μm, and the particle size of the pearlescent powder is ≤15μm; in the pearlescent layer, the mass ratio of PVC resin to pearlescent powder is 100:0.5-2; in the silver powder layer, the mass ratio of PVC resin to silver powder is 100:8-15.

2. The silver reinforced composite material according to claim 1, characterized in that, The pearlescent layer has a thickness of 0.08-0.15 mm and comprises the following components by weight: 100 parts by weight of PVC resin with a degree of polymerization of 1300-1500; 40-45 parts by weight of plasticizer; 8-10 parts by weight of cold-resistant agent; 2.5-3.0 parts by weight of liquid barium zinc stabilizer; 0.2-0.4 parts by weight of UV absorber; 0.1-0.2 parts by weight of composite antioxidant; and 0.5-2 parts by weight of pearlescent powder.

3. The silver reinforced composite material according to claim 2, characterized in that, The thickness of the silver powder layer is 0.25-0.30 mm, and it comprises the following components by weight: 100 parts by weight of PVC resin with a degree of polymerization of 1300-1500, 35-40 parts by weight of plasticizer, 5-8 parts by weight of cold resistant agent, 2-2.5 parts by weight of liquid barium zinc stabilizer, and 8-15 parts by weight of silver powder.

4. The silver reinforced composite material according to claim 2, characterized in that, The PVC film has a thickness of 0.20-0.25 mm and comprises the following components in parts by weight: 100 parts by weight of PVC resin with a degree of polymerization of 1300-1500, 45-50 parts by weight of plasticizer, 8-10 parts by weight of cold resistant agent, and 2.0-2.5 parts by weight of liquid barium zinc stabilizer.

5. The silver reinforced composite material according to claims 2-4, characterized in that, The plasticizer is DINP or DOTP; the cold-resistant agent is DOA; and the UV absorber is UV-531.

6. The silver reinforced composite material according to claims 2-4, characterized in that, The pearlescent layer, silver powder layer, and PVC film are prepared using a calendering process.

7. The method for preparing the silver reinforced composite material according to claim 1, characterized in that, Includes the following steps: S1: After preheating the pearlescent layer and the silver powder layer at 100-120℃ respectively, they are laminated at 140-150℃ using a laminating machine to obtain a silver composite layer. S2: The silver composite layer, polyester fiber mesh, and PVC film are laminated at a high temperature of 175-185℃ using a large roller to obtain the silver reinforced composite material.

8. The preparation method according to claim 7, characterized in that, In step S2, the polyester fiber mesh is ironed at 80-90°C before high-temperature lamination, coated with PVC paste, and dried at 160-170°C. The silver composite layer and the PVC film are preheated at 150-160°C before pressing.

9. A silver-reinforced space composite material, characterized in that, The silver reinforced space composite material has a sandwich structure comprising a second surface layer, a second intermediate layer, and a second bottom layer. The second surface layer and the second bottom layer are silver reinforced composite materials as described in any one of claims 1-6, and the second intermediate layer is a space mesh. The silver reinforced space composite material is obtained by pressing the second surface layer, the second intermediate layer, and the second bottom layer at a high temperature, with a bonding temperature of 175-185℃ and a pressure of 25-35 kg / m². 2 .

10. The silver reinforced space composite material according to claim 9, characterized in that, The space mesh is coated with PVC paste on both sides and preheated at 160-170℃ before pressing, and the silver reinforced composite material is preheated at 145-160℃ before pressing.

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