Rattan plaited glass door and preparation method thereof

Abstract

The invention relates to the technical field of rattan plaited door preparation, in particular to a rattan plaited glass door and a preparation method thereof. The preparation method of the rattan plaited glass door comprises the following steps that S1, a plurality of plates are connected end to end to define a frame, a containing space is formed in the frame, and a clamping groove is formed in the inner wall of each plate; s2, coating the surface of the frame with a composite film to obtain a coated frame; and S3, a glass plate is applied to at least one face of the rattan plaited sheet, a composite core plate is obtained, the composite core plate is installed in the containing space, the edges of the composite core plate are all clamped in the clamping grooves, and the rattan plaited glass door is obtained. The frame of the rattan-plaited glass door is tightly compounded with the core plate to form a stable dustproof structure, the rattan-plaited sheets are not prone to loosening and deformation, and the overall attractiveness and stability of the rattan-plaited door are guaranteed. In addition, the frame is coated with the polyvinylidene fluoride-polypropylene composite film in advance, so that the frame has excellent sun-proof, scratch-resistant and environment-friendly performance, and the service life of the rattan plaited glass door is prolonged.

Description

Technical Field

[0001] The invention relates to the technical field of rattan door preparation, and in particular to a rattan glass door and a preparation method thereof. Background Art

[0002] Most of the existing rattan door products on the market clamp the rattan material in the middle of a hollow wooden frame. However, the rattan door with the above structure is very easy to accumulate dust because the rattan material is not isolated from the outside, and it is difficult to clean. Moreover, after long-term use, the rattan material in the middle of the rattan door is easy to loosen, and the wooden frame is also prone to aging, resulting in a decrease in the overall sun protection and scratch resistance of the rattan door. Summary of the invention

[0003] The main purpose of the present invention is to provide a rattan glass door and a preparation method thereof, aiming to improve the technical problems of existing rattan door products, such as being difficult to clean, the rattan material in the middle being easy to loosen, and the sun protection and scratch resistance of the frame being reduced after aging.

[0004] To achieve the above object, the present invention provides a method for preparing a rattan glass door, comprising the following steps:

[0005] S1. A plurality of plates are connected end to end to form a frame, and the frame has a containing space, and the inner wall of each plate is provided with a slot;

[0006] S2. The surface of the frame is coated with a composite film to obtain a coated frame;

[0007] S3. Apply a glass plate to at least one side of the rattan sheet to obtain a composite core panel, install the composite core panel in the accommodating space, and make the edges of the composite core panel all stuck in the slots to obtain the rattan glass door.

[0008] Preferably, the composite membrane in step S2 is a polyvinylidene fluoride-polypropylene composite membrane.

[0009] Preferably, the polyvinylidene fluoride-polypropylene composite membrane in step S2 comprises the following preparation steps:

[0010] S21. Preparation of weather-resistant polypropylene film;

[0011] S22. The weather-resistant polypropylene film and the polyvinylidene fluoride film are respectively subjected to corona treatment;

[0012] S23. Laminating the corona-treated polyvinylidene fluoride film onto the weather-resistant polypropylene film, and obtaining the polyvinylidene fluoride-polypropylene composite film after cooling and solidification.

[0013] Preferably, the weather-resistant polypropylene film in step S21 comprises the following preparation steps:

[0014] According to mass percentage, 85-90% of polypropylene resin, 1-2% of ultraviolet absorber, 1-2% of light stabilizer, 0.5-1% of antioxidant and 0.5-1% of toughening agent are mixed and stirred evenly; the mixed materials are melt-extruded, cast into film, and cooled to obtain the weather-resistant polypropylene film.

[0015] Preferably, the antioxidant is at least one of a hindered amine antioxidant and a hindered phenol antioxidant; and the toughening agent is at least one of a polyolefin elastomer and an ethylene-vinyl acetate copolymer.

[0016] Preferably, in step S22, the voltage during the corona treatment is 14-16 kV, the frequency during the corona treatment is 10-12 kHz, and the time during the corona treatment is 8-10 s.

[0017] Preferably, the shape of the electrode during the corona treatment in step S22 is an arc electrode or a grid electrode.

[0018] Preferably, when the polyvinylidene fluoride film is laminated to the weather-resistant polypropylene film in step S23, a laminating machine or a laminating machine is used to laminate the polyvinylidene fluoride film to the weather-resistant polypropylene film, and the temperature is raised from room temperature to 120-130°C before laminating. The heating rate is 1-2°C / min, and the laminating speed is 9-10m / min.

[0019] Preferably, in step S2, the frame is heated to 78-82° C. before being coated with the composite film.

[0020] In addition, the present invention also provides a rattan glass door, which is made by any of the above-mentioned methods for making a rattan glass door.

[0021] Compared with the prior art, the rattan glass door of the present invention has the following beneficial effects: when the rattan glass door of the present invention is closed, the frame tightly clamps the composite core board to form a stable dustproof structure to prevent dust from entering the room, and the rattan sheet is combined with the glass plate and fixed on the main frame, which is not easy to loosen and deform, thereby ensuring the overall aesthetics and stability of the rattan door. In addition, the frame is pre-coated with a polyvinylidene fluoride-polypropylene composite film, so that the frame has excellent sun protection, scratch resistance and environmental protection performance, and prolongs the service life of the rattan glass door. BRIEF DESCRIPTION OF THE DRAWINGS

[0022] In order to more clearly illustrate the embodiments of the present application or the technical solutions in the prior art, the drawings required for use in the embodiments or the description of the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present application. For ordinary technicians in this field, other related drawings can be obtained based on these drawings without paying any creative work.

[0023] Figure 1 This is a schematic structural diagram of the middle frame of the rattan glass door of the present invention;

[0024] Figure 2 It is a schematic diagram of the cross-sectional structure of the rattan woven glass door of the present invention;

[0025] Figure 3 for Figure 2 A partial enlarged view of the middle A;

[0026] Figure 4 The figure is a schematic diagram of the cross-sectional structure of the middle frame and the composite film of the rattan glass door of the present invention.

[0027] In the attached drawings: 1-plate material, 11-card slot, 2-frame, 21-accommodating space, 3-composite film, 4-rattan sheet, 5-glass plate, 6-composite core plate.

[0028] The realization of the purpose, functional features and advantages of this application will be further explained in conjunction with embodiments and with reference to the accompanying drawings. DETAILED DESCRIPTION

[0029] The technical solutions in the embodiments of the present invention are described clearly and completely below. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0030] In addition, the technical solutions between the various embodiments can be combined with each other, but it must be based on the fact that ordinary technicians in the field can implement it. When the combination of technical solutions is contradictory or cannot be implemented, it should be deemed that such combination of technical solutions does not exist and is not within the scope of protection required by the present invention.

[0031] This solution improves the traditional rattan door in terms of structure and materials, so that the rattan glass door has better protection effect and is easy to clean. The internal rattan material is not easy to loosen, the frame is not easy to age, and the sun protection and scratch resistance are better.

[0032] like Figures 1 to 4 As shown, a method for preparing a rattan glass door comprises the following steps:

[0033] S1. Multiple plates 1 are connected end to end to form a frame 2, and the frame 2 has a receiving space 21, and the inner wall of each plate 1 is provided with a slot 11;

[0034] S2. The surface of the frame 2 is coated with a composite film 3 to obtain a coated frame;

[0035] S3. Apply a glass plate 5 to at least one side of the rattan sheet 4 to obtain a composite core panel 6, install the composite core panel 6 in the accommodating space 21, and make the edges of the composite core panel 6 all stuck in the slot 11, so as to obtain the rattan glass door.

[0036] The structural improvements include: the rattan glass door includes a main frame 2 covered with a composite film 3, a composite door core formed by a rattan sheet 4 and a glass plate 5, the frame 2 is composed of a plate 1 assembled by a high-frequency press, and the frame 2 is used to accurately clamp the composite core plate 6 to complete the assembly, and the rattan sheet 4 and the glass plate are cleverly combined. The frame 2 is coated with a composite film 3 to provide it with all-round protection. The rattan glass door of the above structure has a simple production process and a low production cost, and enhances the structural stability, effectively preventing the rattan sheet 4 inside from being loose. Since the frame 2 is coated with a composite film 3, the deformation of the frame 2 is also avoided. Compared with existing rattan door products, its sun protection and scratch resistance are improved, which can effectively extend the service life of the door body in outdoor or sunny environments, protect the surface of the door body from scratches in daily use, and improve the overall quality and reliability of the product, which meets the requirements of modern society for green and environmentally friendly products.

[0037] In different embodiments, the frame 2 can be composed of 3, 4 or more panels, preferably 4 panels connected end to end to form a rectangular frame 2. In different embodiments, the glass plate 5 can be glued and fixed on the front, back or both sides of the rattan sheet 4 to adjust the adaptability to different scenes.

[0038] The specific preparation steps of the rattan glass door of this scheme include:

[0039] Preparation of rattan sheet 4: Select high-quality rattan sheet 4, cut the rattan sheet 4 to ensure that the size matches the glass plate 5, and reserve appropriate edge margins; use deionized water to clean the surface of the rattan sheet 4 to remove dust and grease to improve the bonding effect; then cut the rattan sheet 4 into the required size.

[0040] The rattan sheet 4 and the glass plate 5 are attached and fixed: transparent environmentally friendly glue is applied to the cut rattan sheet 4, and the rattan sheet 4 is gently pressed on the glass plate 5 to ensure that the rattan sheet 4 is closely attached to the glass plate 5 without bubbles, and the rattan sheet 4 is attached to the surface of the glass plate 5 to ensure that the rattan sheet 4 is flat and not easy to loosen. During the attachment process, a clip or a soft bandage can be used to increase the attachment pressure of the two to assist in attaching the rattan sheet 4 and the glass plate 5, and the above-mentioned auxiliary tools can be removed after the curing is completed.

[0041] Assembly of the composite core panel 6 and the frame 2: Use a grooving device to pre-open a slot 11 on the side of the plate 1 of the frame 2. The depth and width of the slot 11 match the composite core panel 6 to ensure that the composite core panel 6 can be firmly embedded. Use a grinder or sandpaper to grind the edge of the slot 11 to remove burrs and ensure that it is smooth and does not hurt the hand. Align the composite core panel 6 with the slot 11 and gently push it in. Use a high-frequency frame assembly machine to achieve rapid assembly to ensure that the edge of the composite core panel 6 is completely embedded in the slot 11 to form a dust-proof and stable structure.

[0042] After the rattan glass door is prepared, the four corners of the rattan glass door are polished to remove sharp edges to ensure safety. The polished area can also be recolored with a repair pen of the same color to maintain the integrity of the appearance.

[0043] In the specific operation process, a glue gun with a precise scale is used to paste and fix the rattan sheet 4 and the glass plate 5. When applying glue, the operator operates according to the predetermined glue dosage standard (such as 0.5-1ml glue can be applied to the surface of the rattan sheet 4 per square decimeter), which can effectively reduce the possibility of excessive use of glue. When applying glue, the glue is evenly distributed on the key bonding parts of the rattan sheet 4 by point coating or line coating, rather than randomly smearing on a large area, for example, glue is applied to the edge part where the rattan sheet 4 contacts the glass plate 5, so that sufficient bonding strength can be guaranteed and glue can be avoided from accumulating in other areas. At the same time, in the process of applying glue, with appropriate pressure control, the glue can be evenly penetrated into the texture and hole edge of the rattan sheet 4, but the glue will not be squeezed into the depth of the hole due to excessive pressure to cause overflow.

[0044] Furthermore, the composite membrane 3 in step S2 is a polyvinylidene fluoride-polypropylene composite membrane.

[0045] In other embodiments, a high-strength composite film in the prior art may be used to coat the frame 2. In order to further improve the overall performance of the frame 2, this embodiment uses a special polyvinylidene fluoride-polypropylene composite film as a coating material to coat the surface of the frame 2, so that the prepared rattan glass door is both beautiful and has the functions of sun protection, scratch resistance and environmental protection. Compared with the ordinary composite film formula in the prior art, the polyvinylidene fluoride-polypropylene composite film (PVDF-PP composite film) of the present invention is composited by a weather-resistant polypropylene film and a polyvinylidene fluoride film, and the composite of the two can better synergistically play a protective role.

[0046] Furthermore, the polyvinylidene fluoride-polypropylene composite membrane in step S2 includes the following preparation steps:

[0047] S21. Preparation of weather-resistant polypropylene film;

[0048] S22. The weather-resistant polypropylene film and the polyvinylidene fluoride film are respectively subjected to corona treatment;

[0049] S23. Laminating the corona-treated polyvinylidene fluoride film onto the weather-resistant polypropylene film, and obtaining the polyvinylidene fluoride-polypropylene composite film after cooling and solidification.

[0050] In this embodiment, a weather-resistant polypropylene film is prepared in advance, and a PVDF film with high toughness and high weather resistance is selected, and the thickness can be 20um; then the weather-resistant polypropylene film and the polyvinylidene fluoride film are corona treated respectively, and then the polyvinylidene fluoride film is laminated on the weather-resistant polypropylene film. Corona treatment is to ionize the gas on the surface of the film under the action of a high-voltage electric field, generate plasma and react with the molecules on the surface of the film. For the weather-resistant polypropylene film, after its surface is corona treated, the molecular chain is activated, the surface energy is increased, and the roughness is also changed. This change enables the surface of the weather-resistant polypropylene film to better interact with the polyvinylidene fluoride film intermolecularly, forming a stronger bond. The laminated polyvinylidene fluoride film and the weather-resistant polypropylene film need to be cooled and solidified, usually left to stand for about 24 hours at room temperature, and then they can be completely cured to obtain a polyvinylidene fluoride-polypropylene composite film.

[0051] The polyvinylidene fluoride film in this solution mainly plays the role of an external protective barrier in the composite film 3. Its high weather resistance can effectively resist the erosion of the door body by external factors such as ultraviolet rays, rain, and sand. At the same time, the smooth surface characteristics of the polyvinylidene fluoride film help to reduce the adhesion of dust and dirt, making the rattan glass door easier to clean and keeping the appearance neat. The polyvinylidene fluoride film cooperates with the ultraviolet absorber, light stabilizer and other components in the weather-resistant polypropylene film to further improve the weather resistance of the composite film 3. The polyvinylidene fluoride film blocks most of the direct exposure to ultraviolet rays, while the additives in the weather-resistant polypropylene film absorb and neutralize the small amount of ultraviolet rays that pass through the polyvinylidene fluoride film, forming a multi-level ultraviolet protection system, which greatly extends the service life of the rattan glass door in outdoor or sunny environments.

[0052] The polyvinylidene fluoride-polypropylene composite film can be inspected before use, such as observing the appearance quality of the composite film 3, including but not limited to flatness, presence of bubbles, color uniformity and other indicators, and then it can be prepared for use in the frame 2 coating after it is qualified.

[0053] Furthermore, the weather-resistant polypropylene film in step S21 includes the following preparation steps:

[0054] According to mass percentage, 85-90% of polypropylene resin, 1-2% of ultraviolet absorber, 1-2% of light stabilizer, 0.5-1% of antioxidant and 0.5-1% of toughening agent are mixed and stirred evenly; the mixed materials are melt-extruded, cast into film, and cooled to obtain the weather-resistant polypropylene film.

[0055] In this embodiment, raw materials such as polypropylene resin, ultraviolet absorber, light stabilizer, antioxidant and toughening agent are accurately weighed in proportion and uniformly mixed in a high-speed mixer; the mixed materials are melt-extruded through a twin-screw extruder to form a film of about 12 um; the film is stretched and shaped using a casting process to obtain the desired ductility; and then cooled and rolled into a roll, ready to be bonded to a polyvinylidene fluoride film.

[0056] The formula of weather-resistant polypropylene film is also part of the material improvement. Through the precise selection and proportioning of UV absorbers, light stabilizers, antioxidants and other ingredients, the weather-resistant polypropylene film has good weather resistance and flexibility, laying the foundation for the excellent performance of polyvinylidene fluoride-polypropylene composite film.

[0057] Furthermore, the antioxidant is at least one of a hindered amine antioxidant and a hindered phenol antioxidant; and the toughening agent is at least one of a polyolefin elastomer and an ethylene-vinyl acetate copolymer.

[0058] The weather-resistant polypropylene film formula of this scheme uses polypropylene resin as the basic material, ultraviolet absorbers and antioxidants (such as HALS ultraviolet absorbers and hindered phenol antioxidants) as weather-resistant additives, and polyolefin elastomers (POE) and ethylene-vinyl acetate copolymers (EVA) as toughening agents. In addition, other additives such as lubricants (calcium stearate, zinc stearate, etc.), antistatic agents (quaternary ammonium salt antistatic agents, etc.), pigments, etc. can also be added in appropriate amounts according to needs.

[0059] Furthermore, in step S22, the voltage during the corona treatment is 14 to 16 kV, the frequency during the corona treatment is 10 to 12 kHz, and the time during the corona treatment is 8 to 10 s.

[0060] Compared with the existing process, the corona treatment process of the present invention is more targeted and is designed to achieve high-strength bonding between weather-resistant polypropylene film and polyvinylidene fluoride film, rather than general surface treatment. The corona treatment process parameters and environmental range values ​​include: voltage is set between 14-16kV; frequency is controlled at 10-12kHz; treatment time is set to 8-10s; treatment environment temperature is preferably maintained at 20-30℃; humidity is controlled within the relative humidity range of 40%-55%. At the same time, the surface of the film material can also be pre-treated before corona treatment, such as cleaning and drying, to ensure that there are no impurities, moisture, etc. on the film surface that affect the corona treatment effect.

[0061] Furthermore, the electrode shape during the corona treatment in step S22 is an arc electrode or a grid electrode. The corona treatment of the weather-resistant polypropylene film and the polyvinylidene fluoride film is performed using a specially designed electrode shape such as an arc electrode or a grid electrode, so that the electric field distribution is more uniform, thereby achieving more uniform activation of the molecular chains on the film surface and improving the uniformity of the bonding strength.

[0062] Furthermore, when the polyvinylidene fluoride film is laminated to the weather-resistant polypropylene film in step S23, a laminating machine or a laminating machine is used to laminate the polyvinylidene fluoride film to the weather-resistant polypropylene film, and the temperature is raised from room temperature to 120-130°C before laminating. The heating rate is 1-2°C / min, and the laminating speed is 9-10m / min.

[0063] In this embodiment, a laminating machine or a laminating machine is used to laminate the polyvinylidene fluoride film onto a weather-resistant polypropylene film. The equipment parameters are heated to 120-130°C, the heating rate is controlled at 1-2°C / min, and the laminating speed is 9-10m / min. Under these parameters, the finished product obtained by laminating is relatively stable without bright marks. The thickness of the finished PVDF-PP composite film is usually around 32um.

[0064] During the heating process of this solution, the weather-resistant polypropylene film and the polyvinylidene fluoride film can be placed in a suitable temperature state when they are bonded, thereby improving the activity of the molecules, promoting the molecular diffusion and interaction between the two films, and improving the bonding strength. In particular, the existing process usually simply heats the film to a certain temperature before bonding, while the present invention strictly limits the heating rate during the heating process to 1-2°C / min, and accurately controls the heating process, which not only improves the bonding strength, but also has a positive effect on other properties of the composite film 3. For example, under this condition, the additives (ultraviolet absorbers, light stabilizers, etc.) in the polyvinylidene fluoride film and the weather-resistant polypropylene film can be better dispersed and play a role. Secondly, the flexibility of the composite film 3 can also be improved, so that the molecular chain of the film material becomes relatively soft, which can better adapt to frames 2 of different shapes, improve the tightness and fit of the coating, and further enhance the overall structural stability and protective performance of the product. In addition, the laminating process after heating and the subsequent cooling and curing process - curing at room temperature for 24 hours form a complete temperature control cycle, so that the composite film 3 gradually forms a stable structure and performance in the process from high-temperature laminating to room-temperature curing.

[0065] In general, in the polyvinylidene fluoride-polypropylene composite film laminating process of the present invention: firstly, the weather-resistant polypropylene film and the PVDF film are corona treated, and the corona is used to activate the molecular chains on the surface of the film, increase the surface energy, and then the laminating is performed at a specific temperature and heating rate, and the two layers of the film are tightly combined based on the diffusion and interaction between molecules, and after laminating, the two layers of the film are left to stand for 24 hours at room temperature for complete curing, and the pressure factor during laminating is less required. The molecular activation state after the corona treatment in the laminating process and the temperature control during the laminating process are crucial to the laminating effect; and the laminating process parameters are clear and comprehensive, including the voltage, frequency, treatment time, ambient temperature, humidity of the corona treatment, and the heating rate, laminating temperature, laminating speed and subsequent cooling and curing conditions during laminating. The above parameter control makes the laminating process of the composite film 3 of the present invention more controllable and stable, and can ensure that the laminating product has good performance, and there will be no defects such as bright marks.

[0066] Furthermore, in step S2, the frame 2 is heated to 78-82°C before being coated with the composite film 3. The frame 2 is heated to 80±2°C so that the composite film 3 is more closely attached to the surface of the frame 2 under the action of heat and pressure, thereby improving the tightness and firmness of the coating.

[0067] In addition, the present invention also provides a rattan glass door 4, which is made by any of the above-mentioned methods for making a rattan glass door 4. The rattan glass door 4 is made by any of the above-mentioned methods for making a rattan glass door, that is, the rattan glass door 4 has the same beneficial effects as above, which will not be described one by one here.

[0068] The technical solution of the present invention is further described in detail below in conjunction with specific embodiments. It should be understood that the following embodiments are only used to explain the present invention, and are not used to limit the present invention.

[0069] Comparative Example 1

[0070] A method for preparing a rattan glass door, characterized in that it comprises the following steps:

[0071] S1. Multiple plates 1 are connected end to end to form a frame 2, and the frame 2 has a receiving space 21, and the inner wall of each plate 1 is provided with a slot 11;

[0072] S2. When the frame 2 is heated to 80°C, a conventional (polyethylene-polypropylene) PE-PP composite film 3 is coated on the surface of the frame 2 to obtain a coated frame;

[0073] S3. Apply a glass plate 5 to at least one side of the rattan sheet 4 to obtain a composite core panel 6, install the composite core panel 6 in the accommodating space 21, and make the edge of the composite core panel 6 be stuck in the slot 11, so as to obtain a rattan glass door.

[0074] Example 1

[0075] All preparation steps in this embodiment are consistent with those in comparative example 1, with the only difference being that a polyvinylidene fluoride-polypropylene composite film is used to coat the frame in this embodiment.

[0076] The preparation of polyvinylidene fluoride-polypropylene composite membrane comprises the following steps:

[0077] S21. According to the mass percentage, 87% of polypropylene resin, 2% of ultraviolet absorber (specifically, a mixture of benzophenone ultraviolet absorber and benzotriazole ultraviolet absorber in a ratio of 1:1), 2% of light stabilizer (specifically, hindered amine light stabilizer), 0.5% of antioxidant (specifically, a mixture of hindered phenol antioxidant and HALS ultraviolet absorber in a ratio of 1:1) and 0.5% of toughening agent (specifically, a mixture of POE and EVA in a ratio of 1:1), 0.3% of lubricant (specifically, calcium stearate), 0.3% of antistatic agent (specifically, quaternary ammonium salt antistatic agent), 7.4% of pigment are mixed and stirred evenly; the mixed material is melt-extruded, cast into film, and cooled to obtain a weather-resistant polypropylene film;

[0078] S22. The weather-resistant polypropylene film and the polyvinylidene fluoride film were corona treated, the voltage during the corona treatment was 15 kV, the frequency was 11 kHz, and the corona time was 9 s;

[0079] S23. When the temperature is raised from room temperature to 125°C, the corona-treated polyvinylidene fluoride film is laminated onto the weather-resistant polypropylene film at a heating rate of 4°C / min and a lamination speed of 9.5m / min. After cooling and solidification, a polyvinylidene fluoride-polypropylene composite film is obtained.

[0080] Example 2

[0081] A method for preparing a rattan glass door, characterized in that it comprises the following steps:

[0082] S1. Multiple plates 1 are connected end to end to form a frame 2, and the frame 2 has a receiving space 21, and the inner wall of each plate 1 is provided with a slot 11;

[0083] S2. When the frame 2 is heated to 78°C, the surface of the frame 2 is coated with a polyvinylidene fluoride - polypropylene composite film to obtain a coated frame;

[0084] S3. Apply a glass plate 5 to at least one side of the rattan sheet 4 to obtain a composite core panel 6, install the composite core panel 6 in the accommodating space 21, and make the edge of the composite core panel 6 be stuck in the slot 11, so as to obtain a rattan glass door.

[0085] The preparation of polyvinylidene fluoride-polypropylene composite membrane comprises the following steps:

[0086] S21. According to the mass percentage, 87.5% of polypropylene resin, 2% of ultraviolet absorber (specifically benzotriazole ultraviolet absorber), 2% of light stabilizer (specifically hindered amine light stabilizer), 0.5% of antioxidant (specifically hindered phenol antioxidant and HALS ultraviolet absorber, the ratio is 2:1) and 0.6% of toughening agent (specifically POE and EVA mixed, the ratio is 2:1), 0.2% of lubricant (specifically calcium stearate), 0.2% of antistatic agent (specifically quaternary ammonium salt antistatic agent), 7% of pigment are mixed and stirred evenly; the mixed material is melt-extruded, cast into film, and cooled to obtain a weather-resistant polypropylene film;

[0087] S22. The weather-resistant polypropylene film and the polyvinylidene fluoride film were subjected to corona treatment, the voltage during the corona treatment was 14 kV, the frequency was 12 kHz, and the corona time was 10 s;

[0088] S23. When the temperature is raised from room temperature to 128°C, the corona-treated polyvinylidene fluoride film is laminated onto the weather-resistant polypropylene film at a heating rate of 3°C / min and a lamination speed of 9m / min. After cooling and solidification, a polyvinylidene fluoride-polypropylene composite film is obtained.

[0089] Example 3

[0090] A method for preparing a rattan glass door, characterized in that it comprises the following steps:

[0091] S1. Multiple plates 1 are connected end to end to form a frame 2, and the frame 2 has a receiving space 21, and the inner wall of each plate 1 is provided with a slot 11;

[0092] S2. When the frame 2 is heated to 80°C, the surface of the frame 2 is coated with a polyvinylidene fluoride - polypropylene composite film to obtain a coated frame;

[0093] S3. Apply a glass plate 5 to at least one side of the rattan sheet 4 to obtain a composite core panel 6, install the composite core panel 6 in the accommodating space 21, and make the edge of the composite core panel 6 be stuck in the slot 11, so as to obtain a rattan glass door.

[0094] The preparation of polyvinylidene fluoride-polypropylene composite membrane comprises the following steps:

[0095] S21. According to the mass percentage, 88% of polypropylene resin, 1.8% of ultraviolet absorber (specifically benzophenone ultraviolet absorber), 1.8% of light stabilizer (specifically benzotriazole light stabilizer), 0.7% of antioxidant (specifically hindered phenol antioxidant and HALS ultraviolet absorber, the ratio is 1:2) and 0.5% of toughening agent (specifically EVA), 0.3% of lubricant (specifically calcium stearate), 0.3% of antistatic agent (specifically quaternary ammonium salt antistatic agent), 6.6% of pigment are mixed and stirred evenly; the mixed material is melt-extruded, cast into film, and cooled to obtain a weather-resistant polypropylene film;

[0096] S22. The weather-resistant polypropylene film and the polyvinylidene fluoride film were corona treated, the voltage during the corona treatment was 16 kV, the frequency was 10 kHz, and the corona time was 8.5 s;

[0097] S23. When the temperature is raised from room temperature to 120°C, the corona-treated polyvinylidene fluoride film is laminated onto the weather-resistant polypropylene film at a heating rate of 4.5°C / min and a lamination speed of 10m / min. After cooling and curing, a polyvinylidene fluoride-polypropylene composite film is obtained.

[0098] Comparative Example 2

[0099] The preparation steps and parameters in this comparative example are the same as those in Example 1, except that the weather-resistant polypropylene film and the polyvinylidene fluoride film are not subjected to corona treatment, and the polyvinylidene fluoride film is directly laminated on the weather-resistant polypropylene film.

[0100] The PE-PP composite film of Comparative Example 1 and the PVDF-PP composite films prepared in Examples 1-3 and Comparative Example 2 were subjected to performance tests, and the specific test results are shown in the following table:

[0101]

[0102] Note: When testing the above properties, the elongation at break (longitudinal), elongation at break (transverse), scratch resistance, dry heat resistance, pollution resistance, yellowing resistance and 180° peel strength are all tested using the DSY-ZB-SFY-032PP film standard.

[0103] As shown in the test results in the above table, the PVDF-PP composite films obtained in Examples 1-3 all have good ductility, scratch resistance and weather resistance. After the PVDF-PP composite film is coated on the frame, it has a good protective effect on the rattan glass door.

[0104] In Comparative Example 1, a conventional PE-PP composite film is coated on the surface of the frame. The conventional composite film may have a certain protective effect on the internal frame. However, by observing the test results of Example 1 and Comparative Example 1, it can be seen that compared with the conventional PE-PP composite film, the composite PVDF-PP film of this scheme can better improve the scratch resistance, weather resistance, etc. of the product.

[0105] It can be seen from the test results of Example 1 and Comparative Example 2 that the present solution performs corona treatment before laminating the weather-resistant polypropylene film and the polyvinylidene fluoride film, which can improve the bonding strength between the two film layers.

[0106] Example 4

[0107] The preparation steps and parameters in this embodiment are the same as those in Embodiment 1, except that the formula of the weather-resistant polypropylene film is different, specifically:

[0108] S21. According to mass percentage, 88% of polypropylene resin, 2% of ultraviolet absorber (specifically benzotriazole ultraviolet absorber), 2% of light stabilizer (specifically hindered amine light stabilizer), 0.5% of antioxidant (specifically hindered phenol antioxidant and HALS ultraviolet absorber mixed in a ratio of 1:1) and 0.7% of toughening agent (specifically POE and EVA mixed in a ratio of 3:1), 0.3% of lubricant (specifically calcium stearate), 0.2% of antistatic agent (specifically quaternary ammonium salt antistatic agent), and 6.3% of pigment are mixed and stirred evenly; the mixed material is melt-extruded, cast into film, and cooled to obtain a weather-resistant polypropylene film.

[0109] The PVDF-PP composite membrane prepared in Example 4 was subjected to performance testing, and the specific test results are shown in the following table:

[0110]

[0111]

[0112] As shown in the test data in the table above, it can be seen from the test results of Example 1 and Example 4 that Example 4 optimizes various properties by selecting specific high-efficiency raw materials (such as ultraviolet absorbers, light stabilizers, etc.) and optimizing the proportion of each component. In the formula, high-performance ultraviolet absorbers and light stabilizers effectively improve weather resistance; the rationally matched proportion of toughening agents further enhances the elongation at break; the combination of antioxidants and the appropriate addition of other additives work together to ensure the overall performance of the material, so that the prepared PVDF-PP composite film performs well in various test items, which is significantly better than Example 1.

[0113] Example 5

[0114] The preparation steps and parameters in this embodiment are the same as those in Example 1, except that the parameters during the corona treatment are different. Specifically, the voltage during the corona treatment of the weather-resistant polypropylene film is 16 kV, the frequency is 12 kHz, and the corona time is 10 s; the voltage during the corona treatment of the polyvinylidene fluoride film is 16 kV, the frequency is 12 kHz, and the corona time is 10 s.

[0115] The PVDF-PP composite membrane prepared in Example 5 was subjected to performance testing, and the specific test results are shown in the following table:

[0116]

[0117] As shown in the test data in the above table, it can be seen from the test results of Example 1 and Example 5 that, under the condition that other preparation steps and parameters are the same, under the special corona treatment parameters in this scheme, the physical properties of the product can be significantly improved, so that it has better weather resistance and structural stability, thereby improving product quality and being more in line with actual use needs.

[0118] Example 6

[0119] The preparation steps and parameters in this embodiment are the same as those in Example 1, except that different electrodes are used in the corona treatment, as shown in the following table:

[0120] Electrode Type Example 1 Conventional plate electrodes Example 6-1 Arc electrode Example 6-1 Grid electrode

[0121] Note: The other embodiments mentioned above are consistent with Embodiment 1, and conventional flat plate electrodes are used for corona treatment.

[0122] The PVDF-PP composite membrane prepared in Example 6 was subjected to performance testing, and the specific test results are shown in the following table:

[0123]

[0124] As shown in the test data in the above table, it can be seen from the test results of Example 1 and Example 6 that the use of specially designed electrode shapes can improve the physical properties of the PVDF-PP composite membrane and make it have better adhesion.

[0125] Example 7

[0126] The preparation steps and parameters in this embodiment are the same as those in Embodiment 1, except that the heating rate in step 23 is different, as shown in the following table:

[0127]

[0128]

[0129] The PVDF-PP composite membrane prepared in Example 7 was subjected to performance testing, and the specific test results are shown in the following table:

[0130]

[0131] As shown in the test data in the above table, from the test results of Example 1 and Example 7, it can be seen that the heating rate of this scheme is preferably 1-2°C / min. The composite films obtained by laminating at this heating rate, such as Examples 7-2 and 7-3, have optimal performance.

[0132] Example 8

[0133] A method for preparing a rattan glass door, characterized in that it comprises the following steps:

[0134] S1. Multiple plates 1 are connected end to end to form a frame 2, and the frame 2 has a receiving space 21, and the inner wall of each plate 1 is provided with a slot 11;

[0135] S2. When the frame 2 is heated to 80°C, the surface of the frame 2 is coated with a polyvinylidene fluoride - polypropylene composite film to obtain a coated frame;

[0136] S3. Apply a glass plate 5 to at least one side of the rattan sheet 4 to obtain a composite core panel 6, install the composite core panel 6 in the accommodating space 21, and make the edge of the composite core panel 6 be stuck in the slot 11, so as to obtain a rattan glass door.

[0137] The preparation of polyvinylidene fluoride-polypropylene composite membrane comprises the following steps:

[0138] S21. According to the mass percentage, 88% of polypropylene resin, 2% of ultraviolet absorber (specifically benzotriazole ultraviolet absorber), 2% of light stabilizer (specifically hindered amine light stabilizer), 0.5% of antioxidant (specifically hindered phenol antioxidant and HALS ultraviolet absorber mixed in a ratio of 1:1) and 0.7% of toughening agent (specifically POE and EVA mixed in a ratio of 3:1), 0.3% of lubricant (specifically calcium stearate), 0.2% of antistatic agent (specifically quaternary ammonium salt antistatic agent), 6.3% of pigment are mixed and stirred evenly; the mixed material is melt-extruded, cast into film, and cooled to obtain a weather-resistant polypropylene film;

[0139] S22. The weather-resistant polypropylene film and the polyvinylidene fluoride film were subjected to corona treatment, respectively. The voltage during the corona treatment was 16 kV, the frequency was 12 kHz, and the corona time was 10 s;

[0140] S23. When the temperature is raised from room temperature to 126°C, the corona-treated polyvinylidene fluoride film is laminated onto the weather-resistant polypropylene film at a heating rate of 1°C / min and a lamination speed of 9m / min. After cooling and curing, a polyvinylidene fluoride-polypropylene composite film is obtained.

[0141] The PVDF-PP composite membrane prepared in Example 8 was subjected to performance testing, and the specific test results are shown in the following table:

[0142]

[0143] It can be seen from the test results in the above table that by further optimizing the formula, corona parameters and heating rate of the weather-resistant polypropylene film, the weather resistance and scratch resistance of the PVDF-PP composite film obtained in this scheme can be best improved, especially the scratch resistance. When it is coated on the surface of the frame, it can resist external scratches and basically will not leave scratches on the frame of the rattan glass door.

[0144] The above description is only a preferred embodiment of the present invention, and does not limit the patent scope of the present invention. All equivalent structural changes made by using the contents of the present invention specification under the inventive concept of the present invention, or directly / indirectly applied in other related technical fields are included in the patent protection scope of the present invention.

Claims

1. A method for preparing a rattan glass door, characterized in that: The steps include: S1. A plurality of plates (1) are connected end to end to form a frame (2), and the frame (2) has a receiving space (21), and the inner wall of each plate (1) is provided with a slot (11); S2. The composite film (3) is coated on the surface of the frame (2) to obtain a coated frame; S3. A glass plate (5) is applied to at least one side of the rattan sheet (4) to obtain a composite core plate (6), and the composite core plate (6) is installed in the accommodating space (21) so that the edges of the composite core plate (6) are all clamped in the clamping groove (11), thereby obtaining the rattan glass door.

2. The method for preparing a rattan glass door according to claim 1, characterized in that: The composite membrane (3) in step S2 is a polyvinylidene fluoride-polypropylene composite membrane.

3. The method for preparing a rattan glass door according to claim 2, characterized in that: The polyvinylidene fluoride-polypropylene composite membrane in step S2 includes the following preparation steps: S21. Preparation of weather-resistant polypropylene film; S22. The weather-resistant polypropylene film and the polyvinylidene fluoride film are respectively subjected to corona treatment; S23. Laminating the corona-treated polyvinylidene fluoride film onto the weather-resistant polypropylene film, and obtaining the polyvinylidene fluoride-polypropylene composite film after cooling and solidification.

4. The method for preparing a rattan glass door according to claim 3, characterized in that: The weather-resistant polypropylene film in step S21 includes the following preparation steps: According to mass percentage, 85-90% of polypropylene resin, 1-2% of ultraviolet absorber, 1-2% of light stabilizer, 0.5-1% of antioxidant, 0.5-1% of toughening agent, 0.1-0.5% of lubricant, 0.1-0.5% of antistatic agent and 3-10% of pigment are mixed and stirred evenly; the mixed materials are melt-extruded, cast into film, and cooled to obtain the weather-resistant polypropylene film.

5. The method for preparing a rattan glass door according to claim 4, characterized in that: The antioxidant is at least one of a hindered amine antioxidant and a hindered phenol antioxidant; the toughening agent is at least one of a polyolefin elastomer and an ethylene-vinyl acetate copolymer.

6. The method for preparing a rattan glass door according to claim 3, characterized in that: In step S22, the voltage during the corona treatment is 14 to 16 kV, the frequency during the corona treatment is 10 to 12 kHz, and the time during the corona treatment is 8 to 10 s.

7. A method for preparing a rattan glass door according to claim 3 or 6, characterized in that: The shape of the electrode during the corona treatment in step S22 is an arc electrode or a grid electrode.

8. The method for preparing a rattan glass door according to claim 3, characterized in that: When the polyvinylidene fluoride film is laminated to the weather-resistant polypropylene film in step S23, a laminating machine or a laminating machine is used to laminate the polyvinylidene fluoride film to the weather-resistant polypropylene film, and the temperature is raised from room temperature to 120-130°C before laminating. The heating rate is 1-2°C / min and the laminating speed is 9-10m / min.

9. The method for preparing a rattan glass door according to claim 1, characterized in that: In step S2, the frame (2) is heated to 78-82°C and then coated with the composite film (3).

10. A rattan glass door, characterized in that: The rattan glass door is prepared by the preparation method of any one of claims 1 to 9.

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