A conveniently foldable air-supported membrane transfer window

Abstract

This invention discloses a conveniently foldable air-supported membrane transfer window, comprising a first inflatable membrane body, a second inflatable membrane body, and an inner frame. Both the first and second inflatable membrane bodies are fitted onto the outer surface of the inner frame and arranged laterally at a certain interval. The hollow cavity of the inner frame forms an internal storage cavity, and an ultraviolet lamp is mounted on the inner top wall of the internal storage cavity. The outer diameter of the first inflatable membrane body is smaller than that of the second inflatable membrane body. The internal air cavities of both the first and second inflatable membrane bodies are closed cavities formed by PVC membranes. The structure of the PVC membrane, from the outside to the inside, includes an outer PVC membrane layer, an airtight layer, an inner PVC membrane layer, an inner coating layer, and a base fabric. The air-supported membrane transfer window provided by this invention is easy to process, can be quickly installed and disassembled, has low production costs, and good airtightness. Using PVC membrane as the inflatable membrane body provides excellent mechanical strength, airtightness, waterproofness, aging resistance, chemical corrosion resistance, flame retardancy, and thermal insulation properties, thus improving the service life of the air-supported membrane transfer window.

Description

Technical Field

[0001] This invention belongs to the field of laboratory construction equipment technology, and in particular relates to a conveniently stored air-film transfer window. Background Technology

[0002] A pass-through window is an auxiliary device in cleanrooms, primarily used for transferring small items between clean areas and between clean and non-clean areas. This reduces the number of times the cleanroom doors are opened, minimizing contamination. Pass-through windows on the market are generally made of stainless steel, with a smooth and clean surface. The double doors are interlocked to effectively prevent cross-contamination, and are equipped with electronic or mechanical interlocking devices and ultraviolet germicidal lamps.

[0003] However, stainless steel pass-through windows are difficult to install and disassemble, and cannot be easily stored. When installing stainless steel pass-through windows, screw holes need to be drilled in the mounting holes in the cleanroom, and the installation time for stainless steel pass-through windows can take more than 1 hour. The replacement cost and production cost of stainless steel pass-through windows are also relatively high.

[0004] To address the aforementioned problems with stainless steel pass-through windows, the inventors of this invention have developed a conveniently storable air-supported membrane pass-through window. However, for the pass-through window used in laboratories in this invention, the air-supported membrane material must also possess good airtightness, water resistance, chemical corrosion resistance, and resistance to volatile organic solvents. Air-supported membrane products are generally fixed by adhesive bonding / heat sealing, and are susceptible to expansion / contraction due to variations in temperature, humidity, processing technology, storage time, or usage time. High or low ambient temperatures can cause air leakage, affecting the product's performance and lifespan. Laboratories frequently experience leaks of volatile gases, solvents, or corrosive solvents. Prolonged exposure to this environment can cause corrosion or chemical reactions on the surface of the air-supported membrane, affecting its airtightness and quality, and shortening its lifespan.

[0005] Commonly used inflatable membrane materials are formed by coating film-forming resin onto a polyester fiber base fabric. These mainly include inflatable PVC membrane materials, inflatable PTFE membrane materials, and inflatable ETFE membrane materials. Inflatable PVC membrane materials are easy to process and have good toughness, but they have low strength, low elastic stiffness, are prone to aging, have large creep, poor self-cleaning properties, poor waterproofing, average thermal insulation performance, and a short service life. To optimize the performance of inflatable PVC membranes, existing technologies apply PVF, PVDF, PMMA, etc., as additional layers onto the PVC coating. However, PVF film formation requires a large amount of solvent, is not environmentally friendly, and is not suitable for brush application; PVDF coatings are prone to pinholes and shrinkage, generating bubbles and causing the coating to detach; PMMA membranes have low surface hardness and are easily scratched. PTFE membranes have advantages such as good light transmittance, strong UV resistance, weldability, and strong self-cleaning properties. However, they have high rigidity and are prone to curling, which weakens their strength. They are also prone to deformation and cracking, affecting their service life. PTFE membranes do not have a base fabric and have specific properties such as self-cleaning, corrosion resistance, and high light transmittance. However, they are susceptible to leakage due to external factors and have high costs. Summary of the Invention

[0006] The purpose of this invention is to provide a conveniently stored air-supported membrane transfer window that is easy to process, can be quickly installed and disassembled, has low production costs, and good airtightness. It uses PVC membrane as the inflatable membrane body, which has excellent mechanical strength, airtightness, waterproofness, aging resistance, chemical corrosion resistance, flame retardancy, and heat insulation properties, thereby improving the service life of the air-supported membrane transfer window.

[0007] To achieve the purpose of this invention, this invention provides a conveniently stored air-membrane transfer window, including a first inflatable membrane body, a second inflatable membrane body, and an inner frame body. The first inflatable membrane body and the second inflatable membrane body are both fitted onto the outer surface of the inner frame body and are respectively located at the front and rear sections of the inner frame body. The first inflatable membrane body and the second inflatable membrane body are arranged laterally at a certain distance.

[0008] The hollow cavity of the inner frame forms an internal storage cavity, and an ultraviolet lamp is installed on the inner top wall where the internal storage cavity is located;

[0009] The outer diameter of the first inflatable membrane is smaller than that of the second inflatable membrane; the internal air cavities of the first and second inflatable membranes are both closed air cavities formed by PVC membranes; the first and second inflatable membranes are each provided with an inflation nozzle that communicates with the internal air cavity for inflating the first and second inflatable membranes.

[0010] Furthermore, the structure of the PVC membrane, from the outside to the inside, includes a PVC outer membrane layer, an airtight layer, a PVC inner membrane layer, an inner coating layer, and a base fabric.

[0011] The base fabric is woven from yarn using a plain weave method. The single-strand yarn is formed by interlacing and winding polyester yarn, acrylic yarn and glass fiber yarn with a yarn ratio of 2:1:1.

[0012] The inner coating is formed by applying a modified epoxy adhesive;

[0013] The PVC inner membrane layer is composed of PVC / ENR composite material;

[0014] The airtight layer is coated with butyl rubber adhesive;

[0015] The PVC outer film layer is composed of PVC / PBA composite material.

[0016] Furthermore, the modified epoxy adhesive is either a nitrile-modified epoxy adhesive or a polysulfide-modified epoxy adhesive.

[0017] Furthermore, the PVC / ENR composite material is composed of the following raw materials in parts by weight: 100 parts PVC resin, 30-45 parts epoxidized natural rubber, 60-70 parts plasticizer, 2-3 parts vulcanizing agent, 1-2 parts accelerator, 1-3 parts fatty alcohol and ethylene oxide condensate, 1-2 parts Rheinland 25, 10-15 parts mica powder, 15-20 parts wollastonite, and 1.5-2 parts antioxidant.

[0018] Furthermore, the preparation method of the PVC / ENR composite material specifically includes the following steps:

[0019] P1. Add epoxidized natural rubber, vulcanizing agent, accelerator, fatty alcohol and ethylene oxide condensate and Rheinland 25 to a mixer, heat to 70-80℃ and mix for 3-5 minutes, then add PVC resin and half the weight of plasticizer, heat to 80-90℃ and mix for 5-8 minutes, then add the other half the weight of plasticizer, mica powder, wollastonite and antioxidant, heat to 100-120℃ and mix for 10-15 minutes.

[0020] P2. The mixed material is fed into a twin-screw extruder and extruded. The extruder temperature is set to 160-190℃ to obtain PVC / ENR composite material.

[0021] Furthermore, the epoxidized natural rubber is ENR50; the plasticizer is a synthetic vegetable ester and epoxidized soybean oil in a mass ratio of 3:1; the vulcanizing agent is zinc fatty acid, zinc oxide and vulcanizing agent CLD-80 in a mass ratio of 1:(0.5-0.8):2; the accelerator is accelerator M and accelerator TMTD in a mass ratio of 1:1; and the antioxidant is any one of antioxidant 4010 or antioxidant 264.

[0022] Furthermore, the PVC / PBA composite material is composed of the following raw materials in parts by weight: 100 parts PVC resin, 30-40 parts PBA polymer emulsion, 8-15 parts modified silane polyether resin, 50-60 parts plasticizer, 3-5 parts heat stabilizer, 15-20 parts nano chitosan, 5-10 parts carboxymethyl chitosan, 20-30 parts mica powder, 30-40 parts calcium carbonate, 0.5-0.8 parts light stabilizer, and 0.3-0.5 parts antioxidant.

[0023] Furthermore, the plasticizer is one or a combination of two or more of DINP, DNP, DPOP, TCP, ESO or EBSt.

[0024] The heat stabilizer is a calcium-zinc stabilizer or an organotin stabilizer;

[0025] The light stabilizer is an ultraviolet light absorber;

[0026] The antioxidant is antioxidant 1010 or antioxidant 168.

[0027] Furthermore, the method for preparing the PVC film specifically includes the following steps:

[0028] (1) Apply modified epoxy adhesive to the outer surface of the base fabric using a sizing roller. After three coats, cure and pre-shape the coating. Then, hot melt coat the outer surface of the base fabric with PVC / ENR composite material to form a PVC inner film layer. After cooling and shaping.

[0029] (2) Spray 1-1.5mm butyl rubber adhesive onto the outer surface of the above PVC inner film layer, let it air dry naturally, and then use a sizing roller to apply butyl rubber adhesive. After three applications, the layer is cured and pre-shaped to obtain an airtight layer.

[0030] (3) The PVC / PBAF composite material is hot-melted and bonded to the outer surface of the above airtight layer to form a PVC outer film layer. Then, the product is embossed, cooled, shaped, and finally trimmed.

[0031] Furthermore, the first inflatable membrane and the second inflatable membrane are connected to the inner frame through a membrane frame. Both the first inflatable membrane and the second inflatable membrane are bonded to the membrane frame with adhesive. The membrane frame is bonded to the inner frame with adhesive, and an electronic interlocking device is provided on the membrane frame and the inner frame.

[0032] The present invention has achieved the following beneficial effects:

[0033] 1. The air-supported membrane transfer window of the present invention is composed of two inflatable membrane bodies. The distance between the first and second inflatable membrane bodies is the thickness of the cleanroom (also known as the laboratory) wall. After the two inflatable membrane bodies are inflated, the applied pressure forms an effective airtightness between them and the wall, so that the entire transfer window can be installed stably and airtightly in the cleanroom. It can withstand a certain pressure and will not deform arbitrarily. It also has the effects of pressure resistance and heat preservation. When the gas is discharged, the air-supported membrane transfer window can be folded and stored, which is conducive to transportation and installation. Compared with stainless steel transfer windows, its production cost and disassembly cost are both lower.

[0034] 2. The air-supported membrane transfer window of the present invention can be installed quickly. At the construction site, it is only necessary to inflate the membrane to support it, and the installation can be completed in 10 minutes, which greatly reduces the difficulty of construction and makes it easy to maintain the membrane if it is damaged.

[0035] 3. The base fabric of the PVC membrane of this invention is woven from single-strand spun yarns made of polyester filaments, acrylic filaments, and glass fiber filaments intertwined in a certain proportion using a plain weave method. Compared with spun yarns composed of a single type of fiber filament, it has better tensile strength, toughness, and elasticity, is not easy to break, can withstand a certain pressure, supports the inner frame and experimental samples, ensures the shape of the air-film transfer window, is not easily deformed, and extends its service life. The addition of acrylic filaments improves the toughness of the spun yarns, and the addition of glass fiber filaments improves the strength and compressive strength of the spun yarns. However, the use of acrylic filaments and glass fiber filaments does not worsen the elasticity and heat insulation properties of the spun yarns. On the contrary, it reduces the thermal conductivity to a certain extent, giving the warp yarns better heat insulation effects and improving the load-bearing capacity of the air-film transfer window.

[0036] 4. The PVC base fabric surface of this invention is coated with a nitrile or polysulfide modified epoxy adhesive, which allows the modified epoxy adhesive to penetrate into the base fabric and has good adhesion to the double-layer PVC resin on its surface. It can form a whole with the double-layer PVC resin film, thereby improving the air tightness of the PVC film and making it less likely for gas to leak from the air cavity of the inflatable membrane. The use of modified epoxy adhesive improves the aging resistance, solvent resistance, and air impermeability of the PVC film.

[0037] 5. The PVC / ENR composite material of this invention uses PVC resin and epoxidized natural rubber as the matrix. Epoxidized natural rubber has high molecular polarity and strong intermolecular forces, exhibiting good compatibility with PVC resin. It can tightly bind with other components in the composite material, retaining the inherent properties of ENR and PVC. This results in the PVC / ENR composite material possessing superior strength, airtightness, resistance to organic solvents, chemical corrosion, and aging resistance, further improving the elasticity, toughness, water resistance, thermal stability, and airtightness of the air film transfer window. The combined use of mica powder and wollastonite enhances the airtightness and mechanical strength of the PVC / ENR composite material, while also providing superior toughness and elasticity. The addition of ENR further improves the properties of PVC... The improved adhesion between the PVC / ENR composite material and the airtight layer and inner coating enhances the airtightness of the air film transfer window, thereby extending its service life. The addition of fatty alcohol and ethylene oxide condensate and Rheinlandia 25 acts as a dispersant and lubricant in this invention, improving the dispersion of epoxidized natural rubber in the composite material, resulting in uniform dispersion of each component and a tighter bond between them, further enhancing the airtightness of the PVC / ENR composite material. The use of fatty alcohol and ethylene oxide condensate and Rheinlandia 25 also reduces the processing viscosity of the PVC / ENR composite material, improves its flowability, reduces or even eliminates melt fracture during hot melting, and improves the processing performance of the PVC / ENR composite material.

[0038] 6. The PVC / PBA composite material of the present invention is made by mixing PVC resin and PBA polymer emulsion as the matrix, and then adding modified silane polyether resin, nano-chitosan, carboxymethyl chitosan, plasticizer, heat stabilizer, mica powder, calcium carbonate and other components. The addition of PBA polymer emulsion can form a complete network film between PVC, organic components and inorganic fillers, preventing the intrusion of moisture and gas, improving the strength, toughness, impact resistance and water resistance of the PVC / PBA composite material, and giving it better wear resistance, corrosion resistance, aging resistance and weather resistance, thereby extending the service life and performance of the present invention, and also improving the adhesion to the airtight layer, thereby further enhancing the airtightness of the air film transfer window; the addition of modified silane polyether resin improves the airtightness, corrosion resistance, water resistance and weather resistance of the PVC / PBA composite material, and gives the PVC / PBA composite material better performance. It possesses superior mechanical strength, toughness, and resistance to contamination. The addition of nano-chitosan and carboxymethyl chitosan enhances the adhesion between the PVC / PBA composite material and the butyl rubber adhesive during hot melt flow, making it less prone to peeling. Furthermore, the nano-chitosan and carboxymethyl chitosan can be uniformly dispersed in the composite material, improving the interaction between the components and thus enhancing the elasticity and mechanical strength of the PVC / PBA composite material, extending the service life of the invention. The combined use of mica powder, calcium carbonate, and PBA polymer emulsion improves the airtightness and mechanical strength of the PVC film, and also provides superior toughness and elasticity.

[0039] 7. The air-film transfer window of the present invention has a low cost. It only requires inflating two air-supported membrane bodies to form a shape. It can be inflated as needed and deflated and folded when not in use, without taking up space and requiring no additional assembly. It can replace the existing stainless steel transfer window. The PVC membrane adopts a specific layer structure and is combined with appropriate processes and formulas, so that the air-film transfer window not only has good mechanical strength, impact resistance and easy installation and storage, but also has excellent physical strength, air tightness, toughness, elasticity, chemical corrosion resistance, volatile solvent resistance, aging resistance, water resistance, flame retardancy, wear resistance, heat insulation and long service life. Attached Figure Description

[0040] Figure 1 This is a schematic diagram of the overall three-dimensional structure of the air-film transfer window of the present invention;

[0041] Figure 2 This is a cross-sectional view of the air film transfer window of the present invention along the AA direction;

[0042] Figure 3 This is a side view of the cleanroom.

[0043] Reference numerals in the attached diagram: 1. First inflatable membrane; 2. Second inflatable membrane; 3. Inner frame; 4. Membrane frame; 5. Internal storage cavity; 6. Ultraviolet lamp; 7. Electronic interlocking device. Detailed Implementation

[0044] The technical solutions in the embodiments of the present invention will be clearly and completely described below. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0045] The modified silane polyether resin of this invention is selected from Asahi Glass's EXCESTAR series, model ExceStar. TM S5830E; the fatty alcohol and ethylene oxide condensate was selected from the dispersant IW of Nantong Yongle Chemical; the nano-chitosan was provided by Hunan Chuangchun New Materials Co., Ltd.; the PBA polymer emulsion was provided by Dushengtai Waterproofing.

[0046] The following description, in conjunction with specific circumstances, illustrates the conveniently stored air-film transfer window of the present invention.

[0047] like Figure 1 and Figure 2 As shown, the conveniently stored air-film transfer window provided by the present invention includes a first inflatable membrane body 1, a second inflatable membrane body 2, an inner frame body 3, a membrane frame 4, and an ultraviolet lamp 6.

[0048] like Figure 1 , Figure 2 and Figure 3 As shown, the first inflatable membrane 1 and the second inflatable membrane 2 are both fitted onto the outer surface of the inner frame 3 and are located at the front and rear sections of the inner frame 3, respectively. The first inflatable membrane 1 and the second inflatable membrane 2 are arranged laterally at a certain interval, that is, the distance between the two inflatable membranes is the thickness of the cleanroom wall, so that the air membrane transfer window can be snapped onto the window of the cleanroom. After inflation, the pressure applied by the first inflatable membrane 1 and the second inflatable membrane 2 forms an effective airtightness with the window on the wall, so that the entire air membrane transfer window is stably and airtightly installed on the cleanroom.

[0049] like Figure 1 and Figure 2 As shown, the hollow cavity of the inner frame 3 forms an internal storage cavity 5, and an ultraviolet lamp 6 is installed on the inner top wall of the internal storage cavity 5. The inner frame 3 can be a square frame to facilitate the placement of materials or reagents in the internal storage cavity 5. The samples / materials to be sent out or sent in are disinfected by irradiation with ultraviolet lamp 6. After disinfection, personnel outside or inside the clean room can take out the samples / materials from the storage and transfer window.

[0050] The outer diameter of the first inflatable membrane 1 is smaller than the outer diameter of the second inflatable membrane 2, so that the entire air-membrane transfer window can be more stably installed on the wall window of the clean room.

[0051] The internal air cavities of the first inflatable membrane 1 and the second inflatable membrane 2 are both closed air cavities formed by enclosing PVC membranes. Both the first inflatable membrane 1 and the second inflatable membrane 2 are provided with air inlets (not shown in the figure) that communicate with the internal air cavities, for inflating or deflating the first inflatable membrane 1 and the second inflatable membrane 2, so as to facilitate storage and maintenance.

[0052] The first inflatable membrane 1 and the second inflatable membrane 2 are connected to the inner frame 3 via a membrane frame 4. Both the first inflatable membrane 1 and the second inflatable membrane 2 are bonded to the membrane frame 4 with adhesive. The membrane frame 4 is also bonded to the inner frame 3 with adhesive. An electronic interlocking device 7 is provided on both the membrane frame 4 and the inner frame 3. The membrane frame 4 improves the adhesion between the two inflatable membranes and the inner frame 3. If the inner frame 3 is corroded or damaged by materials or solvents, it facilitates the replacement or maintenance of the inflatable membranes. The electronic interlocking device 7 can lock the inner frame 3 and the membrane frame 4 together, realizing the connection between the inner frame 3 and the two inflatable membranes.

[0053] The first inflatable membrane 1 and the second inflatable membrane 2 are both made of PVC membrane, and their structure, from the outside to the inside, includes a PVC outer membrane layer, an airtight layer, a PVC inner membrane layer, an inner coating layer, and a base fabric. The base fabric of this invention is woven from yarn using a plain weave method. Each strand of yarn is formed by interlacing polyester, acrylic, and glass fiber filaments in a 2:1:1 yarn ratio. The yarn has a denier of 400-500D, preferably 450D.

[0054] The inner coating of this invention is formed by applying a modified epoxy adhesive. The modified epoxy adhesive is either a nitrile-modified epoxy adhesive or a polysulfide-modified epoxy adhesive. The preferred modified epoxy adhesive in this invention is Struktol Polydis 3614 nitrile rubber modified epoxy resin adhesive.

[0055] The PVC inner membrane layer of the present invention is composed of a PVC / ENR composite material. Preferably, the PVC / ENR composite material is composed of the following raw materials in parts by weight: 100 parts PVC resin, 30-45 parts epoxidized natural rubber, 60-70 parts plasticizer, 2-3 parts vulcanizing agent, 1-2 parts accelerator, 1-3 parts fatty alcohol and ethylene oxide condensate, 1-2 parts Rheinlandia 25, 10-15 parts mica powder, 15-20 parts wollastonite, and 1.5-2 parts antioxidant.

[0056] The preparation method of the above-mentioned PVC / ENR composite material specifically includes the following steps:

[0057] P1. Add epoxidized natural rubber, vulcanizing agent, accelerator, fatty alcohol and ethylene oxide condensate and Rheinland 25 to a mixer, heat to 70-80℃ and mix for 3-5 minutes, then add PVC resin and half the weight of plasticizer, heat to 80-90℃ and mix for 5-8 minutes, then add the other half the weight of plasticizer, mica powder, wollastonite and antioxidant, heat to 100-120℃ and mix for 10-15 minutes.

[0058] P2. The mixed material is fed into a twin-screw extruder and extruded. The extruder temperature is set to 160-190℃ to obtain PVC / ENR composite material.

[0059] Preferably, the above-mentioned epoxidized natural rubber is ENR50 from Zhonghe Petrochemical;

[0060] The plasticizer is a synthetic vegetable ester (selected from Luoyang Sanjin Chemical) and epoxidized soybean oil in a mass ratio of 3:1;

[0061] The vulcanizing agent is zinc fatty acid, zinc oxide and vulcanizing agent CLD-80 in a mass ratio of 1:(0.5~0.8):2;

[0062] The accelerators are accelerator M and accelerator TMTD in a mass ratio of 1:1;

[0063] The antioxidant is either antioxidant 4010 or antioxidant 264.

[0064] The airtight layer of the present invention is coated with butyl rubber adhesive, preferably, the butyl rubber adhesive is selected from Chemlock butyl rubber IIR250.

[0065] The PVC outer film layer of the present invention is composed of a PVC / PBA composite material. Preferably, the PVC / PBA composite material is composed of the following raw materials in parts by weight: 100 parts PVC resin, 30-40 parts PBA polymer emulsion, 8-15 parts modified silane polyether resin, 50-60 parts plasticizer, 3-5 parts heat stabilizer, 15-20 parts nano chitin, 5-10 parts carboxymethyl chitosan, 20-30 parts mica powder, 30-40 parts calcium carbonate, 0.5-0.8 parts light stabilizer, and 0.3-0.5 parts antioxidant.

[0066] Preferably, the plasticizer is one or a combination of two or more of DINP, DNP, DPOP, TCP, ESO or EBSt; the heat stabilizer is a calcium-zinc stabilizer or an organotin stabilizer; the light stabilizer is an ultraviolet light absorber; and the antioxidant is antioxidant 1010 or antioxidant 168.

[0067] The method for preparing the PVC film of the present invention specifically includes the following steps:

[0068] (1) Apply modified epoxy adhesive to the outer surface of the base fabric using a sizing roller. After three applications, cure and pre-shape at 100°C for 1 hour. Then, hot melt coat PVC / ENR composite material onto the outer surface of the base fabric. The hot melt bonding temperature is 160°C, the bonding pressure is 300N, and the bonding speed is 5m / min. After cooling and shaping, a PVC inner film layer is formed.

[0069] (2) Spray 1-1.5 mm of butyl rubber adhesive onto the outer surface of the above PVC inner film layer, let it air dry for 30 minutes, and then use a sizing roller to apply butyl rubber adhesive. After applying the adhesive three times, cure and pre-shape at 140°C for 40 minutes to obtain an airtight layer.

[0070] (3) Hot melt bonding of PVC / PBA composite material to the outer surface of the above airtight layer. The hot melt bonding temperature is 180℃, the bonding pressure is 450N, and the bonding speed is 5m / min. Then, after embossing, cooling, and shaping, the product is finally trimmed.

[0071] The PVC / ENR composite material and the PVC / PBA composite material are described below with reference to specific examples.

[0072] Example 1: PVC / ENR Composite Material

[0073] The preparation method of PVC / ENR composite material is as follows:

[0074] Weigh out the following parts by weight: 30 parts of epoxidized natural rubber, 2 parts of vulcanizing agent, 1 part of accelerator, 1 part of fatty alcohol and ethylene oxide condensate, and 1 part of Rheinland 25 are added to a mixer and heated to 80°C and mixed for 5 minutes. Then, 100 parts of PVC resin and 30 parts of plasticizer are added, and the mixture is heated to 90°C and mixed for 8 minutes. Next, 30 parts of plasticizer, 10 parts of mica powder, 15 parts of wollastonite, and 1.5 parts of antioxidant are added, and the mixture is heated to 110°C and mixed for 15 minutes. The mixture is then extruded through a twin-screw extruder with the extruder temperature set to 160–190°C to obtain the PVC / ENR composite material.

[0075] In this embodiment of the invention, the PVC resin is selected from Formosa Plastics PR-500; the epoxidized natural rubber is selected from Chung-Ho Petrochemical's ENR50; the plasticizer is a synthetic vegetable ester (selected from Luoyang Sanjin Chemical) and epoxidized soybean oil (selected from Fite Chemical's epoxidized glyceryl triester ESO) in a mass ratio of 3:1; the vulcanizing agent is zinc fatty acid, zinc oxide and vulcanizing agent CLD-80 in a mass ratio of 1:0.5:2; the accelerator is accelerator M and accelerator TMTD in a mass ratio of 1:1; the antioxidant is antioxidant 4010; the mica powder is 100 mesh mica powder; and the wollastonite is 1250 mesh wollastonite from Dexu.

[0076] Example 2 PVC / ENR composite material

[0077] The preparation method of PVC / ENR composite material is as follows:

[0078] Weigh out the following parts by weight: 45 parts of epoxidized natural rubber, 3 parts of vulcanizing agent, 2 parts of accelerator, 3 parts of fatty alcohol and ethylene oxide condensate, and 2 parts of Rheinland 25 are added to a mixer and heated to 80°C and mixed for 5 minutes. Then, 100 parts of PVC resin and 35 parts of plasticizer are added, and the mixture is heated to 90°C and mixed for 8 minutes. Next, 35 parts of plasticizer, 15 parts of mica powder, 20 parts of wollastonite, and 2 parts of antioxidant are added, and the mixture is heated to 110°C and mixed for 15 minutes. The mixture is then extruded through a twin-screw extruder with the extruder temperature set to 160–190°C to obtain the PVC / ENR composite material.

[0079] The above-mentioned vulcanizing agent is zinc fatty acid, zinc oxide and vulcanizing agent CLD-80 in a mass ratio of 1:0.8:2. The formulation and model of other components are the same as those in Example 1. Please refer to Example 1 for details.

[0080] Example 3 PVC / ENR composite material

[0081] The preparation method of PVC / ENR composite material is as follows:

[0082] Weigh out the following parts by weight: 40 parts of epoxidized natural rubber, 2.5 parts of vulcanizing agent, 1.8 parts of accelerator, 2.4 parts of fatty alcohol and ethylene oxide condensate, and 1.2 parts of Rheinland 25. Add them to a mixer and heat to 80°C and mix for 5 minutes. Then add 100 parts of PVC resin and 32 parts of plasticizer, heat to 90°C, and mix for 8 minutes. Then add 32 parts of plasticizer, 12 parts of mica powder, 18 parts of wollastonite, and 1.8 parts of antioxidant, heat to 110°C, and mix for 15 minutes. Extrude the mixture through a twin-screw extruder with the extruder temperature set to 160–190°C to obtain the PVC / ENR composite material.

[0083] The above-mentioned vulcanizing agent is zinc fatty acid, zinc oxide and vulcanizing agent CLD-80 in a mass ratio of 1:0.6:2. The formulation and model of other components are the same as those in Example 1. Please refer to Example 1 for details.

[0084] Comparative Example 1: PVC Composite Material

[0085] The raw materials and preparation method of the PVC composite material in this comparative example are the same as those in Example 3. The difference is that no epoxidized natural rubber, vulcanizing agent and accelerator were added in this comparative example 1, and the amount of PVC resin added was 140 parts.

[0086] Comparative Example 2: PVC / ENR Composite Material

[0087] The raw materials and preparation method of the PVC / ENR composite material in this comparative example are the same as those in Example 3. The difference is that in this comparative example 2, fatty alcohol and ethylene oxide condensate and Rheinland 25 were not added, but 3.6 parts of oxidized polyethylene wax were used instead.

[0088] Example 4: PVC / PBA composite material

[0089] Weigh out 100 parts by weight of PVC resin, 30 parts of PBA polymer emulsion, 8 parts of modified silane polyether resin, 50 parts of plasticizer, 15 parts of nano-chitosan, and 10 parts of carboxymethyl chitosan, add them to a mixer and mix evenly. Heat to 100℃ and mix for 10 minutes. Then add 3 parts of organotin stabilizer, 20 parts of mica powder, and 40 parts of calcium carbonate and mix for 15 minutes. Cool to room temperature, then add 0.5 parts of UV absorber UVP-327 and 0.3 parts of antioxidant 1010 and mix for 30 minutes. Extrude through a twin-screw extruder with the extruder temperature set to 160-190℃ to obtain the PVC / PBA composite material.

[0090] In this embodiment of the invention, the PVC resin is selected from Formosa Plastics PR-500; the plasticizer is 1:2 DINP and ESO, wherein the plasticizer DINP is selected from Qilu Petrochemical's DINP, and the ESO is selected from Fitt Chemical's epoxy glycerol triester ESO; the organotin stabilizer is Arkema's HERMOLITE C-101.

[0091] Example 5: PVC / PBA Composite Material

[0092] Weigh out 100 parts by weight of PVC resin, 40 parts of PBA polymer emulsion, 15 parts of modified silane polyether resin, 60 parts of plasticizer, 20 parts of nano-chitosan, and 5 parts of carboxymethyl chitosan. Add them to a mixer and mix evenly. Heat to 100℃ and mix for 10 minutes. Then add 5 parts of organotin stabilizer, 30 parts of mica powder, and 30 parts of calcium carbonate. Mix for 15 minutes. Cool to room temperature. Then add 0.8 parts of UV absorber UVP-327 and 0.5 parts of antioxidant 1010 and mix for 30 minutes. Extrude through a twin-screw extruder with the extruder temperature set to 160-190℃ to obtain the PVC / PBA composite material.

[0093] Example 6: PVC / PBA Composite Material

[0094] Weigh out 100 parts by weight of PVC resin, 36 parts of PBA polymer emulsion, 10 parts of modified silane polyether resin, 55 parts of plasticizer, 25 parts of nano-chitosan, and 8 parts of carboxymethyl chitosan, add them to a mixer and mix evenly. Heat to 100℃ and mix for 10 minutes. Then add 4 parts of organotin stabilizer, 28 parts of mica powder, and 35 parts of calcium carbonate and mix for 15 minutes. Cool to room temperature, then add 0.6 parts of UV absorber UVP-327 and 0.3 parts of antioxidant 1010 and mix for 30 minutes. Extrude through a twin-screw extruder with the extruder temperature set to 160-190℃ to obtain the PVC / PBA composite material.

[0095] Comparative Example 3 PVC Composite Material

[0096] The raw materials and preparation method of the PVC composite material in this comparative example are the same as those in Example 6. The difference is that no PBA polymer emulsion was added in this comparative example 3, and the amount of PVC resin added was 136 parts.

[0097] Comparative Example 4: PVC / PBA Composite Material

[0098] The raw materials and preparation method of the PVC / PBA composite material in this comparative example are the same as those in Example 6. The difference is that no modified silane polyether resin was added in this comparative example 4.

[0099] Comparative Example 5: PVC / PBA Composite Material

[0100] The raw materials and preparation method of the PVC / PBA composite material in this comparative example are the same as those in Example 6. The difference is that carboxymethyl chitosan was not added in this comparative example 5.

[0101] The composite materials provided in Examples 1-6 and Comparative Examples 1-5 were extruded using a screw extruder and then mixed in a rolling mill at a mixing temperature of 150°C for 10 minutes. After mixing, the mixtures were fed into a calender for calendering to form a film. After cooling in a water bath and degreasing, a PVC film with a thickness of 0.5 ± 0.1 mm was obtained. The PVC films obtained in Examples 1-6 and Comparative Examples 1-5 were then tested, and the test results are shown in Table 1 below.

[0102] The solvent resistance test in Table 1 uses a mixture of 30% toluene and 70% isooctane by volume as the organic solvent to test the PVC film. The test period is 7 days, the temperature is 25±2℃, the humidity is RH50%, and the change rate of right angle tear strength is observed.

[0103] For alkali resistance testing, the sample was soaked in 0.5wt% NaOH solution for 72 hours, and the rate of change in right-angle tear strength was observed.

[0104] Table 1. PVC Film Performance Test Data

[0105]

[0106]

[0107] Note: All measured data are longitudinal detection results.

[0108] As can be seen from Table 1, the PVC composite materials provided in Examples 1-3 and Examples 4-6 have superior mechanical strength, water resistance, alkali resistance, and organic solvent resistance.

[0109] The technical features of the above embodiments can be combined arbitrarily. For the sake of brevity, not all possible combinations of the technical features in the above embodiments are described. However, as long as there is no contradiction in the combination of these technical features, they should be considered to be within the scope of this specification.

[0110] The embodiments described above are merely examples of several implementations of the present invention, and while the descriptions are relatively specific and detailed, they should not be construed as limiting the scope of the present invention. It should be noted that those skilled in the art can make various modifications and improvements without departing from the concept of the present invention, and these modifications and improvements all fall within the scope of protection of the present invention.

Claims

1. A conveniently foldable air-supported membrane transfer window, comprising a first inflatable membrane body (1), a second inflatable membrane body (2), and an inner frame body (3), characterized in that, The first inflatable membrane (1) and the second inflatable membrane (2) are both fitted on the outer surface of the inner frame (3) and are located at the front and rear sections of the inner frame (3) respectively. The first inflatable membrane (1) and the second inflatable membrane (2) are arranged laterally at a certain distance. The hollow cavity of the inner frame (3) forms an internal storage cavity (5), and an ultraviolet lamp (6) is provided on the inner top wall where the internal storage cavity (5) is located. The outer diameter of the first inflatable membrane (1) is smaller than the outer diameter of the second inflatable membrane (2); the internal air cavities of the first inflatable membrane (1) and the second inflatable membrane (2) are both closed air cavities formed by PVC membranes; the first inflatable membrane (1) and the second inflatable membrane (2) are each provided with an inflation nozzle that communicates with the internal air cavity, for inflating the first inflatable membrane (1) and the second inflatable membrane (2); The structure of the PVC membrane, from the outside to the inside, includes an outer PVC membrane layer, an airtight layer, an inner PVC membrane layer, an inner coating layer, and a base fabric. The base fabric is woven from yarn using a plain weave method. The yarn is formed by interlacing and winding polyester filaments, acrylic filaments, and glass fiber filaments with a yarn ratio of 2:1:

1. The inner coating is formed by applying a modified epoxy adhesive; The PVC inner membrane layer is composed of PVC / ENR composite material; The airtight layer is coated with butyl rubber adhesive; The PVC outer film layer is composed of PVC / PBA composite material.

2. The conveniently foldable air-film transfer window according to claim 1, characterized in that, The modified epoxy adhesive is either a nitrile-modified epoxy adhesive or a polysulfide-modified epoxy adhesive.

3. The conveniently foldable air-film transfer window according to claim 1, characterized in that, The PVC / ENR composite material is composed of the following raw materials in parts by weight: 100 parts PVC resin, 30-45 parts epoxidized natural rubber, 60-70 parts plasticizer, 2-3 parts vulcanizing agent, 1-2 parts accelerator, 1-3 parts fatty alcohol and ethylene oxide condensate, 1-2 parts Rheinland 25, 10-15 parts mica powder, 15-20 parts wollastonite, and 1.5-2 parts antioxidant.

4. The conveniently foldable air-film transfer window according to claim 3, characterized in that, The preparation method of the PVC / ENR composite material specifically includes the following steps: P1. Add epoxidized natural rubber, vulcanizing agent, accelerator, fatty alcohol and ethylene oxide condensate and Rheinland 25 to a mixer, heat to 70-80℃ and mix for 3-5 minutes, then add PVC resin and half the weight of plasticizer, heat to 80-90℃ and mix for 5-8 minutes, then add the other half the weight of plasticizer, mica powder, wollastonite and antioxidant, heat to 100-120℃ and mix for 10-15 minutes. P2. The mixed material is fed into a twin-screw extruder and extruded. The extruder temperature is set to 160-190℃ to obtain PVC / ENR composite material.

5. The easily retractable air-film transfer window according to claim 4, characterized in that, The epoxidized natural rubber is ENR50; the plasticizer is a synthetic vegetable ester and epoxidized soybean oil in a mass ratio of 3:1; the vulcanizing agent is zinc fatty acid, zinc oxide and vulcanizing agent CLD-80 in a mass ratio of 1:(0.5~0.8):2; the accelerator is accelerator M and accelerator TMTD in a mass ratio of 1:1; the antioxidant is any one of antioxidant 4010 or antioxidant 264.

6. The conveniently foldable air-film transfer window according to claim 1, characterized in that, The PVC / PBA composite material is composed of the following raw materials in parts by weight: 100 parts PVC resin, 30-40 parts PBA polymer emulsion, 8-15 parts modified silane polyether resin, 50-60 parts plasticizer, 3-5 parts heat stabilizer, 15-20 parts nano chitin, 5-10 parts carboxymethyl chitosan, 20-30 parts mica powder, 30-40 parts calcium carbonate, 0.5-0.8 parts light stabilizer, and 0.3-0.5 parts antioxidant.

7. The easily retractable air-film transfer window according to claim 6, characterized in that, The plasticizer is one or a combination of two or more of DINP, DNP, DPOP, TCP, ESO or EBSt. The heat stabilizer is a calcium-zinc stabilizer or an organotin stabilizer; The light stabilizer is an ultraviolet light absorber; The antioxidant is antioxidant 1010 or antioxidant 168.

8. The easily retractable air-film transfer window as described in any one of claims 2-7, characterized in that, The method for preparing the PVC film specifically includes the following steps: (1) Apply modified epoxy adhesive to the outer surface of the base fabric using a sizing roller. After three applications, cure and pre-shape the adhesive. Then, hot melt coat the outer surface of the base fabric with PVC / ENR composite material to form a PVC inner film layer. Cool and shape the adhesive. (2) Spray 1-1.5 mm of butyl rubber adhesive onto the outer surface of the above PVC inner film layer, let it air dry naturally, and then use a sizing roller to apply butyl rubber adhesive. After three applications, cure and pre-shape to obtain an airtight layer. (3) The PVC / PBAF composite material is hot-melted and bonded to the outer surface of the above airtight layer to form a PVC outer film layer. Then, the product is embossed, cooled, and shaped. Finally, the product is trimmed.

9. The conveniently foldable air-film transfer window according to claim 1, characterized in that, The first inflatable membrane (1) and the second inflatable membrane (2) are connected to the inner frame (3) through the membrane frame (4). The first inflatable membrane (1) and the second inflatable membrane (2) are both bonded to the membrane frame (4) with adhesive. The membrane frame (4) and the inner frame (3) are bonded with adhesive. An electronic interlocking device (7) is provided on the membrane frame (4) and the inner frame (3).

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