CN111825869A

CN111825869A - Curtain, preparation method thereof and curtain

Info

Publication number: CN111825869A
Application number: CN201910317643.1A
Authority: CN
Inventors: 张力; 邓昌沪
Original assignee: Individual
Current assignee: Individual
Priority date: 2019-04-19
Filing date: 2019-04-19
Publication date: 2020-10-27

Abstract

The invention provides a curtain, a preparation method thereof and the curtain. The curtain comprises a base film and a reflecting layer, wherein the reflecting layer is a film formed by coating a coating comprising the following components in parts by weight on the surface of the base film: tin antimony oxide: 1.5-2.5 parts; fluorocarbon resin emulsion: 50-75 parts; aqueous polyurethane resin: 0.3-0.8 part; sodium polyacrylate: 0.03-0.08 part; polyvinyl alcohol: 0.1-0.4 part; water and/or alcohol compounds: 32-40 parts. The curtain provided by the invention can effectively block infrared radiation and ultraviolet radiation and enable visible light to pass smoothly, so that the energy consumption of the glass window and the energy consumption of buildings can be reduced effectively under the condition of not influencing indoor lighting.

Description

Curtain, preparation method thereof and curtain

Technical Field

The invention relates to a curtain, a preparation method thereof and the curtain, in particular to a transparent curtain and the curtain which can effectively block infrared rays and ultraviolet rays.

Background

Due to lighting requirements and building aesthetics, buildings have largely adopted glazing designs. However, since the transmission range of general glass widely overlaps with the solar radiation spectrum region, while visible light is transmitted and ultraviolet rays are blocked, a large amount of infrared rays in sunlight are transmitted through the glass window, so that the indoor temperature is increased, the cooling load of an indoor air conditioner is increased, and the indoor heat gain of a building is also influenced. Research shows that in hot summer, the energy consumption of the glass window can even reach about 50 percent of the energy consumption of the whole building.

In order to reduce the energy consumption brought by the glass window, the transmission characteristic of the glass is changed by plating a low-radiation material on the surface of the glass at present, so that the energy-saving effect is achieved. For example, the currently marketed LOW-E glass is formed with a silver and metal oxide film on the surface by an online high-temperature pyrolysis deposition method and an offline vacuum sputtering method. However, the metal film layer and the metal oxide film layer do not have an obvious reflection effect on infrared rays, so that the energy-saving effect is general. In addition, the cost of processing and mounting the LOW-E glass limits its widespread use.

In addition, smart curtains are also reported in the literature, such as Polymer Dispersed Liquid Crystal (PDLC) films, in which liquid crystal molecules are regularly aligned to allow light to pass therethrough when power is applied and are randomly aligned to prevent light from passing therethrough when power is removed. However, most of intelligent curtains are electrically controlled, power needs to be supplied continuously for most of time, the voltage is constant, electric energy is consumed, and raw materials and processing cost are high, so that the intelligent curtain is difficult to popularize on a large scale.

In view of the above, it is still desirable to develop a curtain and a curtain which can effectively block the passage of infrared rays and ultraviolet rays and effectively retain the passage of visible light, thereby effectively reducing the energy consumption of glass windows and the energy consumption of buildings.

Disclosure of Invention

In view of the above-mentioned drawbacks of the prior art, the present invention provides a curtain which can effectively block infrared rays and ultraviolet rays and smoothly pass visible light, thereby effectively reducing the energy consumption of a glass window and the energy consumption of a building.

The invention provides the preparation method of the curtain, and the preparation method has the advantages of simple process and feasible production.

The invention also provides a curtain, which comprises a curtain winding mechanism and the curtain, and the curtain winding mechanism can realize the unwinding or winding of the curtain, thereby reducing the building energy consumption, saving energy and reducing emission.

In order to achieve the above object, the present invention provides a curtain comprising a base film and a reflective layer, wherein the reflective layer is a film layer formed by coating a coating material comprising the following components by weight on the surface of the base film:

tin antimony oxide: 1.5-2.5 parts; fluorocarbon resin emulsion: 50-75 parts; aqueous polyurethane resin: 0.3-0.8 part; sodium polyacrylate: 0.03-0.08 part; polyvinyl alcohol: 0.1-0.4 part; water and/or alcohol compounds: 30-50 parts.

According to the technical scheme provided by the invention, the coating with a specific formula is coated on the base film and is cured to form a film, so that the reflecting layer is formed on the surface of the base film, and the finally obtained curtain can effectively block infrared rays and ultraviolet rays from passing through and ensure that visible light can smoothly pass through. In hot summer, the curtain can be installed outdoors and unfolded in daytime to reduce the indoor temperature. In cold winter, the curtain can be installed indoors and retracted in daytime, so that the indoor energy of solar radiation is fully utilized; the solar energy heating device can be unfolded at night to prevent heat generated by indoor heating equipment from being dissipated in an infrared radiation mode. Therefore, the curtain provided by the invention can effectively reduce the energy consumption of the glass window and the building energy consumption, and can also reduce ultraviolet radiation.

In addition, the curtain has the characteristics of simple processing technology and installation technology, is low in cost and is very suitable for large-scale practical application.

It is understood that the base film as the film-forming support should be transparent, preferably colorless and transparent, so as to allow visible light to sufficiently transmit therethrough. Furthermore, it is desirable to have good adhesion between the base film and the reflective layer to ensure that the reflective layer is firmly secured to the surface of the base film, resulting in a curtain having good performance and a long lifetime. Of course, it is desirable that the base film also have good mechanical properties as well as high temperature resistance, corrosion resistance, etc. to enable the curtain to be used for a long period of time under harsh environmental conditions and to maintain good quality.

Specifically, the base film may be an organic polymer film, and particularly may be a Polyimide (PI) film or a polyethylene terephthalate (PET) film.

Considering that the polyimide film is colorless and transparent, has outstanding high-temperature resistance and can be used in air at 250-280 ℃ for a long time; the material has good mechanical properties, the tensile strength at 20 ℃ is 200MPa, and the tensile strength at 200 ℃ is more than 100 MPa; has stable chemical properties and can resist corrosion of chemical reagents such as hydrocarbons, esters, ethers, alcohols, fluorochloroalkane, weak acid and the like. In addition, the polyimide film can be flame-retarded without adding a flame retardant, and therefore, in the practice of the present invention, a polyimide film is generally selected as the base film.

Antimony Tin Oxide (ATO), also known as nano Antimony-doped Tin dioxide, Antimony Tin Oxide, belongs to Sb-doped SnO₂Of (3) an n-type semiconductor material. Because of its good conductivity, antimony tin oxide is currently used in the preparation of antistatic coatings and antistatic fibers.

Specifically, the average particle diameter of tin antimony oxide is preferably not more than 40 nm. The tin antimony oxide can be prepared by a conventional method, and can also be purchased commercially. In the specific implementation process of the invention, the tin antimony oxide is commercially available tin antimony oxide nano powder, and the particle size range is 20 nm-40 nm.

The fluorocarbon resin emulsion is special acrylic ester and special fluororesin copolymer anionic emulsion, has excellent weather resistance, water resistance, stain resistance and chemical resistance, and is generally used as a film forming agent of paint. It will be appreciated that the coating used to form the reflective layer in the present invention is a water-based coating, and therefore, it is preferred to select an aqueous fluorocarbon resin emulsion, which is commercially available.

The aqueous polyurethane resin is also called water-soluble polyurethane resin, belongs to environment-friendly aqueous resin, and is commonly used as an adhesive (binder). The aqueous polyurethane resin can be classified into anionic aqueous polyurethane resin, cationic aqueous polyurethane resin and nonionic aqueous polyurethane resin, and can be obtained commercially. In the specific implementation process of the invention, the non-ionic aqueous polyurethane resin is selected.

Sodium polyacrylate is a water-soluble straight-chain high molecular polymer, and can be dissolved in water to form a viscous transparent liquid. Sodium polyacrylate has hydrophilic and hydrophobic groups and is often used in paints as a dispersant, thickener, etc. to stabilize the paint system and to provide the paint with a suitable viscosity throughout. In the invention, sodium polyacrylate with the relative molecular mass of 1000-10000 is generally selected so as to enable the coating to have more appropriate viscosity and good stability.

Polyvinyl alcohol is a water-soluble high molecular polymer, and the performance of the polyvinyl alcohol is between that of plastic and rubber. The aqueous solution of polyvinyl alcohol has good adhesion and film forming property, can resist most organic solvents such as oils, lubricants, hydrocarbons and the like, can be used as a dispersant, emulsion polymerization and emulsion stabilizer, and is commonly used for manufacturing water-soluble adhesives, preparing sealants for photosensitive adhesives and benzene solvent resistance and the like.

In the present invention, in the coating material for forming the reflective layer, water may be used as a solvent for thoroughly mixing other components and adjusting the viscosity of the coating material. Alternatively, an alcohol compound may be used as the solvent. Further alternatively, water and an alcohol compound may be used together as a solvent. Wherein the alcohol compound may be at least one of ethanol, butanol, etc.

In a preferred embodiment of the present invention, ethanol is used as the solvent, or an aqueous ethanol solution is used as the solvent, and the concentration of the aqueous ethanol solution is not particularly limited in the present invention. The ethanol or ethanol water solution is used as a solvent, which is not only beneficial to the rapid film formation of the coating coated on the surface of the base film and the shortening of the processing time, but also has the advantages of safety and economy.

The addition amount of the solvent can be adjusted according to the actually selected coating process, and the dosage of the solvent is generally 35-40 parts by total weight of the coating as 100 parts.

Further, the coating for forming the reflecting layer can also comprise 0.001-0.01 part of carbon nanotubes, namely the coating comprises the following components in parts by weight: tin antimony oxide: 1.5-2.5 parts; fluorocarbon resin emulsion: 50-75 parts; aqueous polyurethane resin: 0.3-0.8 part; sodium polyacrylate: 0.03-0.08 part; polyvinyl alcohol: 0.1-0.4 part; water and/or alcohol compounds: 32-40 parts; carbon nanotube: 0.001 to 0.01 portion.

By adding a trace amount of carbon nano tubes into the coating, not only is the heat dissipation of the curtain facilitated, and the uneven temperature of the curtain when the curtain is used at a high temperature is avoided, but also the flexibility of the curtain can be enhanced, and in addition, the selective permeability of the curtain to light rays is not influenced basically.

The carbon nanotubes may especially be single-walled carbon nanotubes, preferably having an average particle size of not more than 5 nm. In the specific implementation process of the invention, the carbon nano tube is a commercial powder carbon nano tube with a single wall of 2-5 nm.

The invention also provides a preparation method of the curtain, which comprises the following steps: and coating the coating on the surface of the base film and forming a film layer to obtain a curtain.

It will be appreciated that the surface of the base film should be kept clean, for example, the base film may be first washed with deionized water, ethanol, and the like, prior to coating. Also, during the coating process, the base film is preferably kept flat to ensure coating and film-forming quality, for example, the base film may be first fixed on a flat glass substrate before coating, and after the coating and curing film-forming is completed, the base film may be separated from the glass substrate to obtain a curtain.

The inventors have found that the coating is suitable for various coating modes, therefore, the coating process of the present invention is not particularly limited, and may be a conventional coating process in the coating field, including but not limited to spraying, curtain coating, spin coating, roll coating, etc.

Specifically, the components for the coating can be mixed in proportion, ground by a sand mill to prepare coating slurry, namely the coating, and then coated on the surface of a clean base film to ensure that the base film is kept flat; standing at room temperature (25-30 ℃) or heating at 30-80 ℃, and curing the coating on the surface of the base film to form a firmly-adhered film, namely a reflecting layer, after the solvent in the coating is fully volatilized, thereby obtaining a colorless transparent curtain capable of effectively blocking infrared radiation and ultraviolet radiation.

The invention further provides a curtain, which comprises the curtain and a curtain winding mechanism arranged on the wall, wherein the curtain is arranged on the curtain winding mechanism and can be controlled by the curtain winding mechanism to be unwound or wound.

The structure of the curtain winding mechanism is not particularly limited, and the curtain winding mechanism can be used for unwinding and winding the curtain.

In the specific implementation process of the invention, the curtain furling mechanism at least comprises a curtain rolling rod, a chain wheel, a bead chain and a rotating piece, wherein: the chain wheel and the rotating piece are used for being arranged on a wall body; one end of the rolling rod is arranged in the chain wheel in a penetrating way, and the other end of the rolling rod is arranged in the rotating piece in a penetrating way; the roller shutter rod is connected with the top end of the curtain; the bead chain is matched with the chain wheel, so that when the bead chain is pulled, the chain wheel can rotate to drive the rolling curtain rod and the rotating piece to rotate, and the rolling or unwinding of the curtain is realized.

Furthermore, the curtain furling mechanism also comprises at least one rotating wheel which is arranged on the wall body, and the rotating wheel is tangent with the chain wheel; when the bead chain is pulled, the chain wheel can be used as a driving wheel to drive the rotating wheel to rotate. Through setting up the runner tangent with the sprocket, when pulling the pearl chain, the sprocket rotates and drives the runner and rotate for the slew velocity of rolling up the curtain pole is limited, prevents to cause quick rolling or unreel fast and damage the curtain because of unexpected operation.

Furthermore, the rotating wheel comprises a bearing and an elastic ring sleeved on the bearing, an annular groove is formed in the periphery of the elastic ring, and the bead chain is matched with the annular groove to drive the rotating wheel through the chain wheel.

Furthermore, the curtain winding mechanism comprises two rotating wheels which are respectively arranged on two sides above the chain wheel, and an equilateral triangle is formed between the circle centers of the two rotating wheels and the circle center of the chain wheel. Like this two runners form extrusion pressure in sprocket top both sides respectively, and the pressure size that the sprocket top both sides received is the same to can further control the slew velocity of rolling up the curtain pole, ensure the reliability of whole curtain roll-up mechanism.

Furthermore, the curtain also comprises one or two limiting rods, the limiting rods are used for being fixed on the wall in parallel, and the limiting rods are perpendicular to the rolling curtain rods and are arranged on one side of the curtain; a limiting guide groove is arranged along the length direction of the limiting rod, and the curtain is arranged in the limiting guide groove in a sliding mode. The curtain is limited by arranging the limiting rods, so that the curtain cannot shake towards two sides in the winding and unwinding processes.

Furthermore, the curtain also comprises a vertical rod fixed at the bottom end of the curtain, and the vertical rod is parallel to the rolling curtain rod. Under the action of gravity of the vertical rod, the curtain can be kept flat when unreeling.

According to the curtain provided by the invention, the coating containing the specific formula is coated on the base film and cured, so that the reflecting layer which is firmly adhered is formed on the surface of the base film, infrared rays and ultraviolet rays can be effectively blocked, and visible light can smoothly pass through the curtain, for example, polyimide is taken as the base film, and the blocking rate of the obtained curtain on the infrared rays can reach more than 90 percent, even more than 98 percent; the ultraviolet blocking rate can reach about 60 percent; and the visible light transmittance is more than 65%. Therefore, the curtain can be used in hot summer to reduce the energy consumption of the glass window and the energy consumption of the building, save the load of the air conditioner, and can be used in cold winter at night to avoid the reduction of the indoor temperature and save the load of the heating equipment.

In addition, the curtain is made of conventional materials which can be obtained commercially, so that the curtain has the advantages of easily obtained raw materials and low cost.

The preparation method of the curtain can be completed through simple coating and curing processes, so that the preparation method has the advantages of simple preparation process and convenience in popularization.

The curtain provided by the invention can be unreeled or reeled according to actual requirements, wherein when unreeling, the curtain not only can effectively obstruct infrared radiation and ultraviolet radiation of sunlight and ensure visible light to pass, but also can avoid indoor heat from being dissipated in an infrared radiation mode, so that the energy consumption of buildings and glass windows is reduced, meanwhile, indoor lighting is not influenced, and negative influence on the landscape aesthetics of buildings is avoided; and when the solar energy is rolled, the energy of solar radiation can be fully utilized.

Drawings

FIG. 1 is a schematic view of a window covering according to an embodiment of the present invention;

FIG. 2 is a cross-sectional view taken along line A-A of FIG. 1;

FIG. 3 is a front view of a window covering according to an embodiment of the present invention;

FIG. 4 is a first side view of a window covering according to an embodiment of the present invention;

fig. 5 is a second side view of the curtain structure according to the embodiment of the present invention;

FIG. 6 is a cross-sectional view taken along line B-B of FIG. 3;

FIG. 7 is a cross-sectional view taken at C-C of FIG. 3;

FIG. 8 is a schematic view of a chain wheel of the window covering according to an embodiment of the present invention;

FIG. 9 is a cross-sectional view E-E of FIG. 8;

FIG. 10 is a schematic view of a bead chain structure of a window covering according to an embodiment of the present invention;

fig. 11 is a schematic view of a rotating wheel structure of the curtain according to an embodiment of the present invention;

FIG. 12 is a cross-sectional view taken along line D-D of FIG. 11;

FIG. 13 is a view illustrating the assembly of the sprocket and the pulley in the window covering according to an embodiment of the present invention;

FIG. 14 is a cross-sectional view F-F of FIG. 13;

fig. 15 is a front view of a structure of a position-limiting rod in a window covering according to an embodiment of the present invention;

fig. 16 is a bottom view of a structure of a position-limiting rod in a window covering according to an embodiment of the present invention;

FIG. 17 is a sectional view taken along line G-G of FIG. 15;

fig. 18 is a cross-sectional view of a structure of a position-limiting rod in a window covering according to an embodiment of the present invention.

Description of reference numerals:

100-curtain; 110-drop bar; 200-a wall body;

210-a glazing; 220-a window frame; 230-window sash frame;

310-rolling shutter rod; 320-a sprocket; 321-a connection hole;

322-grooves; 340-bead chains; 341-stringing ropes;

342-a bead; 350-a rotating member; 360-a first connector;

361-screw; 362-bearing seat; 370-a second connector;

371-screw; 372-a bearing seat; 380-rotating wheel;

381-bearings; 382-an elastic ring; 383-an annular groove;

390-a stop lever; 391-limiting guide grooves; 392-screws;

393-fixation holes.

Detailed Description

In order to make the objects, technical solutions and advantages of the embodiments of the present invention clearer, the technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are some, but not all, embodiments of the present invention. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.

Example one

This embodiment provides a curtain which is produced by the steps of:

fixing the polyimide film on a flat glass substrate, and repeatedly cleaning with alcohol and deionized water; grinding the components by a sand mill according to a formula shown in Table 1 to obtain a coating; and (3) spraying the coating on the surface of the polyimide film, drying at room temperature, curing the coating to form a film, and taking the polyimide film off the glass substrate to obtain the curtain.

The light transmission of the curtain and the polyimide film is tested by adopting a grating spectrophotometer and a Fourier transform infrared spectrometer, wherein the curtain has the transmittance of 65.6 percent for visible light, the barrier rate of 99.4 percent for infrared rays and the barrier rate of 63.1 percent for ultraviolet rays; the polyimide film had a visible light transmittance of 86.0%, an infrared blocking rate of 12.1%, and an ultraviolet blocking rate of 18.0%.

TABLE 1

Component name	Properties of	Mass fraction/%
			Antimony Tin Oxide (ATO)	The particle size is 20-40 nm	2.0
Fluorocarbon resin emulsion		60.0
			Aqueous polyurethane		0.5
Polyacrylamide sodium salt	The relative molecular mass is 1000-10000	0.05
			Polyvinyl alcohol		0.2
Industrial ethanol		37.25

The curtain belongs to daily supplies, is high in use frequency, is lifted at least once every day, and is lifted one thousand times by a simulated manual operation mode, and then the fatigue resistance of the curtain is inspected. After 1000 experimental runs, the mechanical properties of the curtain were hardly changed.

The curtain is lifted and rolled up 1000 times at the environmental temperature of 35 ℃ and minus 5 ℃ respectively, the light transmission of the curtain is tested, the transmittance of the curtain to visible light is about 62.0 percent, the barrier rate to infrared rays is about 98.0 percent, and the barrier rate to ultraviolet rays is about 65.0 percent. Therefore, after frequent use in high-temperature and low-temperature environments, the curtain still maintains high visible light transmittance, high infrared rejection and high ultraviolet rejection.

Example two

This example provides a curtain prepared substantially as described in the first example, using a polyimide film similar to that of the first example, except that the coating formulation is different, and in particular, the coating formulation used in this example is shown in Table 2.

TABLE 2

Component name	Properties of	Mass fraction/%
			Antimony Tin Oxide (ATO)	The particle size is 20-40 nm	2.0
Fluorocarbon resin emulsion		60.0
			Aqueous polyurethane		0.499
Polyacrylamide sodium salt	The relative molecular mass is 1000-10000	0.05
			Polyvinyl alcohol		0.2
Single-walled carbon nanotubes	The specification is 2-5 nm	0.001
			Ethanol aqueous solution	Equal volume of industrial ethanol and deionized water	37.25

The obtained curtain was tested according to the same test method as in example one, wherein: the visible light transmittance was 68.4%, the infrared blocking rate was 98.8%, and the ultraviolet blocking rate was 59.0%.

After the curtain is lifted for one thousand times by simulating a manual operation mode, the fatigue resistance of the curtain is inspected, and after the curtain is operated for 1000 times in an experiment, the mechanical performance of the curtain is hardly changed. Experiments show that the fatigue resistance of the film can be optimized after the single-walled carbon nanotube is added.

The curtain is lifted and rolled up 1000 times at the environmental temperature of 35 ℃ and minus 5 ℃ respectively, the light transmittance of the curtain is tested, and the transmittance of the curtain to visible light, the barrier rate to infrared rays and the barrier rate to ultraviolet rays are almost unchanged.

EXAMPLE III

This example provides a curtain prepared substantially as described in example two, and a polyimide film was used in the same manner as in example two, except that the formulation of the coating was different, and the formulation of the coating used in this example is shown in Table 3.

TABLE 3

Component name	Properties of	Mass fraction/%
			Antimony Tin Oxide (ATO)	The particle size is 20-40 nm	2.0
Fluorocarbon resin emulsion		60.0
			Aqueous polyurethane resin		0.49
Polyacrylamide sodium salt	The relative molecular mass is 1000-10000	0.05
			Polyvinyl alcohol		0.2
Single-walled carbon nanotubes	The specification is 2-5 nm	0.01
			Deionized water		37.25

The obtained curtain was tested according to the same test method as in example one, wherein: the visible light transmittance was 68.2%, the infrared blocking rate was 98.9%, and the ultraviolet blocking rate was 59.3%. It is understood that the visible light transmittance is slightly reduced when the amount of the carbon nanotubes used is higher than that in the examples. The blocking rate of infrared rays can be maintained at a very high level, and the blocking rate of ultraviolet rays is slightly enhanced.

Comparative example 1

This comparative example provides a curtain prepared substantially in accordance with the first example, and a polyimide film used in the same manner as in the first example, except that the formulation of the coating was different, and specifically, the formulation of the coating used in this comparative example is shown in Table 4.

TABLE 4

Component name	Properties of	Mass fraction/%
			Antimony Tin Oxide (ATO)	The particle size is 20-40 nm	1.0
Fluorocarbon resin emulsion		60.0
			Aqueous polyurethane		0.5
Polyacrylamide sodium salt	The relative molecular mass is 1000-10000	0.05
			Polyvinyl alcohol		0.2
Industrial ethanol		38.25

The obtained curtain was tested according to the same test method as in example one, wherein: the visible light transmittance was about 71%, the infrared blocking rate was about 70%, and the ultraviolet blocking rate was 54%. From the comparison results of example one and comparative example one, it can be seen that when the amount of tin antimony oxide used is small, the blocking ratio of the curtain to both infrared rays and ultraviolet rays is remarkably reduced.

Example four

As shown in fig. 1 to 7, the present embodiment provides a curtain, which includes a curtain 100 and a curtain winding mechanism (not shown) for being mounted on a wall 200, where the curtain 100 is mounted on the curtain winding mechanism and can be controlled by the curtain winding mechanism to wind or unwind the curtain.

Specifically, the curtain 100 in this embodiment may be the curtain 100 provided in the foregoing first embodiment or second embodiment. The curtain winding mechanism can adopt a winding mechanism commonly used in the current curtain, for example, the curtain can be wound and unwound through electric control or manual control.

In the curtain of the present embodiment, the curtain winding mechanism is fixed on the wall 200. Specifically, as shown in fig. 1 and 2, a window frame 220 is generally disposed in a wall 200, the window frame 220 is partitioned by a window sash frame 230, and glass is fixed to the window sash frame 230 to form a glass window 210. In this embodiment, the arrangement manner of the glass window 210 is not particularly limited, and may be the installation manner of the glass window 210 in the current building, such as a French window, or a window installed on a balcony.

It will be appreciated that the curtain roller mechanism may be mounted indoors or outdoors and may correspond to the position of the glazing 210. In hot summer, the curtain winding mechanism can be installed outdoors, namely outside the glass window 210, the curtain 100 is controlled to be unwound by the curtain winding mechanism, so that the curtain 100 shields the glass window 210, sunlight passes through the curtain 100, infrared rays and ultraviolet rays in the sunlight are blocked by the curtain 100 and cannot enter a room through the glass window 210, and most visible light rays sequentially penetrate through the curtain 100 and the glass window 210 and enter the room, so that the load of an air conditioner is effectively reduced, and the energy consumption of the glass window 210 and the energy consumption of the whole building are reduced on the premise of not influencing indoor lighting. When the sun is in cold winter, the curtain winding mechanism can be installed indoors, and in daytime, the curtain winding mechanism can control the curtain 100 to wind, so that the curtain 100 does not shield the glass window 210, and sunlight enters the indoor through the glass window 210; at night, the curtain 100 can be controlled to be unwound through the curtain winding mechanism, heat generated by indoor heating equipment is prevented from being dissipated in an infrared radiation mode, the heat is kept indoors, the indoor temperature is guaranteed to be constant, and the load of the heating equipment is reduced.

With further reference to fig. 1 to 7, the curtain roller mechanism at least comprises a roller blind rod 310, a sprocket 320, a bead chain 340 and a rotating member 350, wherein:

the chain wheel 320 and the rotating member 350 are used for being mounted on the wall body 200;

one end of the roller shutter rod 310 is inserted into the sprocket 320, and the other end is inserted into the rotating member 350;

the roller shutter rod 310 is connected to the top end of the curtain 100;

the bead chain 340 is engaged with the chain wheel 320, so that when the bead chain 340 is pulled, the chain wheel 320 can rotate to drive the roller blind rod 310 and the rotating member 350 to rotate, thereby unwinding or winding the curtain 100.

Specifically, the rolling bar 310 is parallel to the glass window 210 and the ceiling (not shown). To facilitate the rotation of the roller blind rod 310, the roller blind rod 310 may be in particular cylindrical, the axial or longitudinal direction of which is parallel to the glass window 210 and the ceiling. The sprocket 320 and the rotating member 350 are respectively fitted over both ends of the rolling rod 310.

When the bead chain 340 is pulled to enable the chain wheel 320 to rotate and drive the roller shutter rod 310 to axially rotate along a certain direction, the curtain 100 is wound on the roller shutter rod 310 to be wound, so that the curtain 100 does not shield the glass window 210 any more; when the rolling shutter rod 310 is axially rotated in the other direction, the curtain 100 is unwound from the rolling shutter rod 310 and is spread downward, and unwinding is performed such that the curtain 100 is parallel or substantially parallel to the glass window 210 and covers the glass window 210.

In this embodiment, the structures of the chain wheel 320 and the bead chain 340 are not particularly limited, as long as the chain wheel 320 and the bead chain 340 can be matched with each other, so that the chain wheel 320 can be driven to rotate when the bead chain 240 is pulled by times, and the chain wheel 320 and the bead chain 340 commonly used in curtains in homes or offices can be specifically used.

As shown in fig. 8 and 9 in conjunction with fig. 4, the sprocket 320 has a coupling hole 321 in the middle, and the sprocket 320 is provided at the outer circumference thereof with a plurality of grooves 322. As shown in fig. 10, the bead chain 340 includes a string 341 and a bead 342 connected in series with the string 341, generally, the center of the bead 342 passes through the string 341 and is fixed on the string 341; further, the beads 342 are preferably evenly distributed along the string 341.

Specifically, when the beads 342 are uniformly distributed along the string 341, the grooves 322 on the outer periphery of the sprocket 320 are correspondingly uniformly distributed along the outer periphery of the sprocket 320, and the length of the arc between two adjacent grooves 322 is preferably consistent with the distance between two adjacent beads 342.

Also, the shape of the beads 342 is matched to the grooves 322 on the outer circumference of the sprocket 320, so that the sprocket 320 and the bead chain 340 can form a structure similar to "mesh" so as to drive and drive the sprocket 320 to rotate when the bead chain 340 is pulled.

The connecting hole 321 in the middle of the chain wheel 320 is used for connecting with the end of the roller shutter rod 310, and the size and shape of the connecting hole 321 should match with the size and shape of the end of the roller shutter rod 310, so that the end of the roller shutter rod 310 can penetrate into the connecting hole 321 and is fixed relative to the chain wheel 320, and the chain wheel 320 can drive the roller shutter rod 310 to rotate. Specifically, the sprocket 320 and the rolling rod 310 may be connected and fixed through a hoop clasping structure, or may be connected and fixed through a fitting structure or the like.

Referring further to fig. 8 and 9 in conjunction with fig. 1 to 7, in particular, the connection hole 321 may be a spline hole, and the end of the rolling shutter rod 310 is formed or provided with a spline. During installation, the spline at the end of the roller blind rod 310 can be inserted into the spline hole, so that the roller blind rod 310 and the chain wheel 320 can be installed and fixed relatively.

Referring to fig. 1 and 3, the curtain winding mechanism further includes a first connecting member 360, and the first connecting member 360 includes a first cross plate (not shown) and a first vertical plate (not shown) connected in an L-shape. Wherein, the first horizontal plate is fixed on the ceiling in parallel by a screw 361; the first riser is perpendicular to the ceiling and the wall 200. The end of the roller shutter rod 310 penetrates through the first vertical plate and is fixedly connected with the chain wheel 320; the sprocket 320 can be fixedly mounted outside the first connecting member 360, i.e., the sprocket 320 is fixedly mounted on the side of the first vertical plate away from the rotating member 350. In this embodiment, the connection manner between the sprocket 320 and the first connecting member 360 is not particularly limited, as long as the sprocket 320 and the first connecting member 360 can be relatively fixed, and the sprocket 320 can rotate under the action of the bead chain 340 to drive the rolling blind rod 310 to rotate. For example, the sprocket 320 may be fixedly installed outside the first connecting member 360 by the rolling bar 310.

Referring to fig. 5 and 6, the rotating member 350 is used to support the other end of the rolling rod 310, and when the rolling rod 310 rotates, the rotating member 350 also rotates, so as to ensure the rolling rod 310 to rotate flexibly. It will be appreciated that the rotating member 350 is coaxially disposed with the sprocket 320. The rotary element 350 can be, in particular, a plain bearing having an inner ring and an outer ring arranged coaxially and rolling bodies arranged between the inner ring and the outer ring. The end of the roller shutter rod 310 is inserted into the inner ring, and the roller shutter rod 310 and the rotating member 350 can be fixed relatively by interference fit, for example.

Referring further to fig. 1 to 3 and fig. 5 and 6, a sliding bearing as the rotating member 350 may be specifically installed in a bearing seat 372, and the bearing seat 372 is fixed to the wall 200 by a second connecting member 370. Specifically, the second connecting member 370 may correspond to the structure of the first connecting member 360, and the second connecting member 370 includes a second cross plate and a second vertical plate connected in an L shape. Wherein the second transverse plate is fixed on the ceiling in parallel by a screw 371; the second riser is perpendicular to the ceiling and wall 200 and the bearing block 372 is fixed to the second riser. The end of the roller shutter rod 310 passes through the second vertical plate and then is connected with the sliding bearing.

With further reference to fig. 4 and fig. 11 to 14, in the curtain provided in this embodiment, the curtain retracting mechanism may further include at least one roller 380 for being mounted on the wall 200, and the roller 380 is tangent to the sprocket 320; when the ball chain 340 is pulled, the chain wheel 320 can be used as a driving wheel to drive the rotating wheel 380 to rotate. When the bead chain 340 is pulled, the chain wheel 320 rotates and drives the rotating wheel 380 to rotate, so that the rotating speed of the roller shutter rod 310 is limited, and the curtain 100 is prevented from being damaged due to quick rolling or quick unwinding caused by accidental operation.

Specifically, the pulley 380 may be a conventional gear that may be disposed below the sprocket 320 and may act as a driven pulley for the sprocket 320 by intermeshing with the sprocket 320.

Alternatively, referring to fig. 4 and fig. 11 to fig. 14, the rotating wheel 380 includes a bearing 381 and an elastic ring 382 sleeved on the bearing 381, an annular groove 383 is provided along an outer circumference of the elastic ring 382, and the ball chain 320 cooperates with the annular groove 383 to drive the rotating wheel 380 by the sprocket 320.

The elastic ring 382 may be made of rubber, so that it has certain elasticity and structural strength. Because the elastic ring 382 has certain elasticity, frequent friction between the sprocket 320 and the wheel 380 and damage to the sprocket 320 and the wheel 380 can be avoided.

Specifically, as shown in fig. 13 and 14, at the portion where the wheel 380 is tangent to the sprocket 320, the annular groove 383 on the wheel 380 and the groove 322 on the sprocket 320 can enclose a chamber in which the bead 342 on the bead chain 340 is accommodated. When the ball chain 340 is pulled, the chain wheel 320 can be driven to rotate, and the rotating wheel 380 is driven to rotate under the combined action of the chain wheel 320 and the ball chain 340. And, it is also possible to ensure that the ball chain 340 slides along the annular groove 383 without deviating from the sprocket 320.

The number of the rotating wheels 380 may be one or more, preferably, the number of the rotating wheels 380 is two, the two rotating wheels 380 are respectively arranged on two sides above the chain wheel 320, and an equilateral triangle is formed between the circle center of the two rotating wheels 380 and the circle center of the chain wheel 320. When the sprocket 320 rotates, the two rollers 380 located on the two sides above the sprocket 320 respectively form a pressing force on the sprocket 320, and the two sides above the sprocket 320 are subjected to the same pressure, so that the rotation speed of the roller blind rod 310 can be further controlled, and the reliability of the whole curtain roller can be ensured.

Referring further to fig. 1 to 4 and fig. 11 and 12, the rotating wheel 380 may be specifically installed in a bearing seat 362, and the bearing seat 362 may be specifically fixed on the first connecting member 360, so that the rotating wheel 380 is fixed to the wall 200 through the bearing seat 362.

Referring further to fig. 1, 3, 5-7, the window covering may further include a hanging rod 110 fixed to the bottom end of the window covering 100, and the hanging rod 110 is parallel to the roller blind rod 310. Thus, when the curtain 100 is unrolled and deployed downward, the curtain 100 can be held flat and parallel to the glazing 210 by the weight of the drop bar 110.

Referring to fig. 15, 16, 17 and 18, the window covering may further include one or two position-limiting rods 390, the position-limiting rods 390 are fixed on the wall 200 in parallel, and the position-limiting rods 390 are perpendicular to the rolling curtain rod 310 and are disposed at one side of the curtain 100; a position-restricting guide groove 391 is provided along the length direction of the position-restricting lever 390, and the curtain 100 is slidably disposed in the position-restricting guide groove 391. The curtain 100 is limited by the limiting rod 390, so that the curtain 100 cannot swing to two sides in the winding and unwinding processes.

Specifically, the stopper 390 may be provided on both sides of the curtain 100, or the stopper 390 may be provided only on one side of the curtain 100. For example, when the area of the glass window 210 is too large, two or more window coverings may be installed in the room, wherein the position-limiting rod 390 may be disposed on one side of the curtain 100 among the outermost window coverings, and the position-limiting rod 390 may or may not be disposed between the two adjacent curtains 390.

As shown in fig. 15 to 18, the radial section of the stopper 390 may be U-shaped, and a groove extending along the length direction of the stopper 390 may be formed on one side of a rectangular section to form a stopper guide groove 391. During unwinding or winding, the edge of one side of the curtain 100 is accommodated in the limiting guide groove 391, so that limiting is achieved.

Specifically, referring to fig. 15 to 18 in combination with fig. 1 and 2, the position-limiting rod 390 may be fixed on the wall 200, the floor or the balcony floor by screws 392, for example, a fixing hole 393 may be provided at an end of the position-limiting rod 390, and the screws 392 may pass through the fixing hole 393 to connect with the floor.

Finally, it should be noted that: the above embodiments are only used to illustrate the technical solution of the present invention, and not to limit the same; while the invention has been described in detail and with reference to the foregoing embodiments, it will be understood by those skilled in the art that: the technical solutions described in the foregoing embodiments may still be modified, or some or all of the technical features may be equivalently replaced; and the modifications or the substitutions do not make the essence of the corresponding technical solutions depart from the scope of the technical solutions of the embodiments of the present invention.

Claims

1. A curtain is characterized by comprising a base film and a reflecting layer, wherein the reflecting layer is a film layer formed by coating a coating material comprising the following components by weight on the surface of the base film:

tin antimony oxide: 1.5-2.5 parts; fluorocarbon resin emulsion: 50-75 parts; aqueous polyurethane resin: 0.3-0.8 part; sodium polyacrylate: 0.03-0.08 part; polyvinyl alcohol: 0.1-0.4 part; water and/or alcohol compounds: 32-40 parts.

2. A curtain as claimed in claim 1, wherein the base film is selected from a polyimide film or a polyethylene terephthalate film.

3. A curtain as claimed in claim 1, wherein the average particle size of the tin antimony oxide is no more than 40 nm.

4. A curtain as claimed in any one of claims 1 to 3, further including 0.001 to 0.01 parts of carbon nanotubes.

5. A curtain as claimed in claim 4, wherein the carbon nanotubes are single-walled carbon nanotubes.

6. A method of preparing a curtain as claimed in any one of claims 1 to 5, comprising: and coating the coating on the surface of the base film and forming a film layer to obtain the curtain.

7. A curtain comprising a curtain as claimed in any one of claims 1 to 6 and a curtain roller mechanism for mounting on a wall, the curtain being mounted on the curtain roller mechanism and being controllable to be unwound or wound.

8. The window covering of claim 7, wherein the curtain take-up mechanism comprises at least a roller shade bar, a sprocket, a bead chain, and a rotating member, wherein:

the chain wheel and the rotating piece are used for being mounted on a wall body;

one end of the rolling curtain rod penetrates through the chain wheel, and the other end of the rolling curtain rod penetrates through the rotating piece;

the roller shutter rod is connected with the top end of the curtain;

the pearl chain with the sprocket cooperation, in order to be in the pulling during the pearl chain, the sprocket can rotate and drive roll up the curtain pole with the rotating member rotates, realizes unreeling or rolling of curtain.

9. The window covering of claim 8, wherein the curtain take-up mechanism further comprises at least one wheel for mounting on a wall, the wheel being tangential to the sprocket; when the bead chains are pulled, the chain wheel can be used as a driving wheel to drive the rotating wheel to rotate.

10. The window covering of claim 9, wherein the wheel includes a bearing and an elastic ring disposed around the bearing, an annular groove is disposed along an outer circumference of the elastic ring, and the bead chain is engaged with the annular groove to drive the wheel.

11. The curtain as claimed in claim 9 or 10, wherein the curtain furling mechanism comprises two rotating wheels, the two rotating wheels are respectively arranged on two sides above the chain wheel, and an equilateral triangle is formed between the circle centers of the two rotating wheels and the circle center of the chain wheel.

12. The window curtain as claimed in claim 8 or 9, further comprising one or two limiting rods, wherein the limiting rods are used for being fixed on the wall in parallel and are perpendicular to the roller shutter rods and arranged on one side of the curtain;

and a limiting guide groove is arranged along the length direction of the limiting rod, and the curtain is arranged in the limiting guide groove in a sliding manner.

13. A sunblind as claimed in claim 8 or claim 9, further comprising a drop bar fixed to the bottom end of the curtain, the drop bar being parallel to the roller blind bar.