A nano-metal heat-insulating film with low light reflectance and low light transmittance and preparation method thereof

A nano-metal, reflective technology, applied in the direction of pressure-sensitive film/sheet, film/sheet adhesive, non-polymer adhesive additives, etc., can solve the problem of reducing internal reflectance of visible light, failing to meet national standards, Reduce visible light reflectance and other issues, achieve the effects of reducing the production process of the composite process, overcoming the deformation of the base film, and low visible light transmittance

Active Publication Date: 2021-09-21
SUZHOU GENER NANO TECH
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0003] Chinese patent document CN106965518A discloses a thermal insulation film compounded with carbon black and organic pigments, which has the advantage of good weather resistance, but when the visible light transmittance is less than 20%, it is difficult to continuously stabilize the color uniformity and clarity mass production
Chinese patent document CN104789110A discloses a heat-insulating film prepared from a non-solvent-type UV-curable coating combined with carbon black and organic pigments. Although the weather resistance problem is solved, the infrared rejection rate of the film is not high and the clarity Not high, that is, the haze is ≈2%, the UV curing energy demand is high, it is difficult to ensure that the base film does not deform and the uniformity of coloring when the visible light transmittance is <20%
[0004] The metal film has the advantages of high definition and good heat insulation effect, and there are many ways to make it. It can be made by thermally evaporating aluminum or magnetron sputtering titanium, iron or nickel-chromium, and the nickel-chromium metal film also has a long service life. Long advantage, but the metal film will cause serious light pollution due to reflection problems when the transmittance is low
Chinese patent document CN204296154U discloses a heat insulation film made of a single-layer metal film, but when the visible light transmittance is lower than 35%, its visible light reflectance is greater than 20%, which will cause serious light pollution and discomfort, and Does not meet national standards
Chinese patent CN102774111A discloses a technical scheme of laminating two magnetron sputtered nickel-chromium films to reduce the reflectance of visible light, but the reflectance is still very high. When the visible light transmits ≈23%, the reflectance is >15 %
Chinese patent document CN103121315A discloses a technical scheme of using a low-reflection magnetron sputtering titanium nitride film and a magnetron sputtering nickel-chromium film to paste to reduce the internal reflectance of visible light, but the external reflectance is also higher than 10%

Method used

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  • A nano-metal heat-insulating film with low light reflectance and low light transmittance and preparation method thereof
  • A nano-metal heat-insulating film with low light reflectance and low light transmittance and preparation method thereof
  • A nano-metal heat-insulating film with low light reflectance and low light transmittance and preparation method thereof

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preparation example Construction

[0046] The present invention also discloses a method for preparing a nano-metal thermal insulation film with low light reflectance and low light transmittance, which includes the following steps:

[0047] S1. Preparation of nickel-chromium base film: select a transparent PET with PU precoating and corona treatment on both sides and the haze is less than 1% as the base film, and plate it on the corona surface of the base film by magnetron sputtering A layer of nickel-chromium alloy, by controlling the thickness to obtain a nickel-chromium base film with a transmittance in the range of 30-60%, and its two sides are PU pre-coating and nickel-chromium layer;

[0048] S2. Preparation of inorganic pigment slurry: first mix and stir the dispersant and solvent in the pre-mixing tank, then pass it into the grinding chamber of the ball mill for grinding, and gradually add carbon black or silicon nitride titanium, and prepare carbon black slurry respectively after grinding material or si...

Embodiment 1

[0054] Base film selection: select a 36 μm thick PET base film with a haze of less than 1%, and its longitudinal and transverse heat shrinkage rates are 1.2% and 0.2%, respectively. The base film is corona treated on one side and pre-coated with PU coating on the other side.

[0055]Preparation of nickel-chromium coating: A layer of nickel-chromium (20% chromium) alloy is plated on the corona surface of the PET base film by magnetron sputtering. Through thickness control, nickel with a visible light transmittance of about 43% is obtained. Chromium base film.

[0056] Preparation of silicon nitride titanium slurry: Weigh 10 parts of silicon nitride titanium with a particle size of 20nm (the doping ratio of silicon is 10%), 2 parts of a small molecule dispersant with a molecular weight of 800, and a polymer dispersion with a molecular weight of 5000. 7 parts of dispersant and 81 parts of ethyl acetate, first mix the dispersant and solvent in the premix tank for 15 minutes, then...

Embodiment 2

[0063] The main difference between Example 2 and Example 1 is that cesium tungsten oxide high heat insulation nanomaterials are added to the scratch-resistant layer, so the difference from Example 1 is that it is necessary to prepare cesium tungsten oxide slurry and UV-curable coating, and the remaining materials and preparation It is the same as that in Embodiment 1 and will not be repeated here.

[0064] Preparation of cesium tungsten oxide slurry: Weigh 20 parts of cesium tungsten oxide with a particle size of 50nm (the doping ratio of cesium is 5%), 10 parts of a polymer dispersant with a molecular weight of 10000 and 70 parts of ethyl acetate. The agent and the solvent were mixed and stirred in the premixing tank for 15 minutes, then cesium tungsten oxide was gradually added, and stirred at 1000RPM for 15 minutes, and finally circulated into the grinding chamber of an 8-liter ball mill through a pneumatic diaphragm pump for grinding, with an online speed of 14m / s In the c...

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Abstract

The invention discloses a nano-metal thermal insulation film with low light reflectance and low light transmittance and a preparation method thereof. The pretreated base film, nickel-chromium layer, installation adhesive layer and release film, the visible light transmittance of the nickel-chromium layer is 30% to 60%, and the UV-curable coating includes nano-inorganic pigment slurry, UV-curable resin, photosensitive agent, leveling agent and solvent, the nano-inorganic pigment slurry at least includes carbon black slurry and silicon nitride titanium slurry, and the installation glue layer is formed by coating the installation glue coating, and the installation glue coating includes carbon black slurry, ultraviolet absorber , pressure sensitive adhesives and solvents. In the present invention, the nano-carbon black and nano-silicon-titanium nitride in the anti-scratch layer, the nickel-chromium layer and the nano-carbon black in the installation glue layer jointly realize the heat-insulating film with low visible light transmittance, which not only ensures the weather resistance of the heat-insulating film Stability, and completely solve the light pollution problem of the low-transmittance metal film, that is, the internal and external reflectance of the heat-insulating film is less than 10%.

Description

technical field [0001] The invention relates to a nano-metal heat-insulating film, in particular to a nano-metal heat-insulating film with high weather resistance, high definition, low reflectivity and low light transmittance and a preparation method thereof, belonging to the technical field of heat-insulating film . Background technique [0002] The thermal insulation film has the function of regulating the sunlight energy entering the room or the car, which can improve the comfort while reducing the energy consumption of the air conditioner in summer. The visible light part of sunlight energy can be adjusted to enter the indoor or car interior through dyes, pigments, metals or a combination of the three. The dye can be added to the composite glue to form a composite dyed film by coating, or added to PET to form a PET primary color film by biaxial stretching. Because it is easy to match the composite glue or PET resin, the clarity of the film is high, but the weather resis...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C09J7/25C09J7/38C09J4/02C09J11/04C09J11/06C09D175/14C09D7/61
CPCC09D175/14C09J4/00C09J11/04C09J11/06C09J2400/163C09J2467/006C09J2475/006C09D7/61C09J7/255C09J7/38C09J2301/122C08K13/02C08K3/04C08K3/34
Inventor 方官久
Owner SUZHOU GENER NANO TECH
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