Summary of the invention
The object of the invention is to overcome above-mentioned the deficiencies in the prior art part and provide a kind of volume little easy to use, and there is no the thermal isolation film of environmental pollution.
Second purpose of the present invention is to provide a kind of method for preparing above-mentioned thermal isolation film.
Purpose of the present invention can be achieved through the following technical solutions:
A kind of thermal isolation film has stratiform structure, it is characterized in that: the film structure of this thermal isolation film is being composited of multilayer insulation cell formation, and each layer insulating unit arranges in the same way; Every layer of insulating unit is comprised of substrate layer and aerogel layer; Described substrate layer is polyimide or carbon-fiber film, and described aerogel layer is the porous silica aerogel; And, also have a high temperature glue-line between adjacent insulating unit.
Thermal isolation film is characterized in that: described porous silica aerogel layer is made of the porous silica aerogel particle, and described porous silica aerogel particle is nano-scale particle.
Thermal isolation film is characterized in that: the outside of outermost substrate layer also is provided with an aluminium coated or a silver plating layer.
Thermal isolation film is characterized in that: the number of plies of described insulating unit is between 3 layers to 50 layers.Test conditions existing according to the inventor is less than 3 layers of its effect of heat insulation and do not have advantage, and be too high more than 50 layers of cost, and create conditions by existing, the thickness of substrate layer and porous aerogel layer also can not be made into nanometer, and during more than 50 layers, thickness and the toughness of thermal isolation film are undesirable.
Thermal isolation film is characterized in that: the number of plies of described insulating unit is 3 layers, or 5 layers, or 7 layers, or 10 layers, or 15 layers, or 19 layers, or 23 layers, or 30 layers, or 36 layers, or 40 layers, or 45 layers, or 50 layers.
Thermal isolation film is characterized in that: the thickness of described substrate layer is between 0.01mm to 0.08mm.Create conditions according to existing, skeleton function when not having less than 0.1mm, greater than 0.08 o'clock, toughness was undesirable.
Thermal isolation film is characterized in that: the thickness of described substrate layer is 0.01mm, or 0.02mm, or 0.03mm, or 0.04mm, or 0.05mm, or 0.06mm, or 0.07mm, or 0.08mm.
Thermal isolation film is characterized in that: the thickness of described aerogel layer is between 0.01mm to 0.3mm.This is optimal insulating thickness, and during less than 0.01mm, fabricating cost is high, and effect of heat insulation is also unstable, during greater than 0.3mm effect of heat insulation with the increase of aerogel layer thickness increase not obvious, cause waste.
Thermal isolation film is characterized in that: the thickness of described aerogel layer is 0.01mm, or 0.02mm, or 0.03mm, or 0.035mm, or 0.04mm, or 0.05mm, or 0.08mm, or 0.1mm, or 0.15mm, or 0.2mm, or 0.25mm, or 0.3mm.
Thermal isolation film is characterized in that: the outside of outermost substrate layer also is provided with an aluminium coated; The number of plies of described insulating unit is 10 layers; The thickness of described substrate layer is 0.03mm; The thickness of described aerogel layer is 0.05mm.
Thermal isolation film is characterized in that: outermost two faces of this thermal isolation film are equipped with aluminium coated or silver plating layer.
Purpose of the present invention can also be achieved through the following technical solutions:
A kind of thermal isolation film preparation method is characterized in that comprising the following steps:
(1) provide base material;
(2) at base material single face coated gas gel;
(3) semi-finished product of (2) step being made are dried into insulating unit;
(4) the multilayer insulation unit is compound;
Wherein, (1) alleged base material of step is polyimide or carbon-fiber film; (2) alleged aerogel of step is the porous silica aerogel; (4) step alleged compound be compound with pressure after inserting high-temp glue between two layers of insulating unit, and each insulating unit arranges in the same way.
Thermal isolation film preparation method is characterized in that, replaces the alleged coating of (2) step in the mode of printing or spray.
Thermal isolation film preparation method is characterized in that, substrate layer outermost surface insulating unit outwardly, and its (1) step single face that provides sets in advance the base material of aluminium coated.
Thermal isolation film preparation method is characterized in that, aluminizes with silver-plated replacement.
Thermal isolation film preparation method is characterized in that, also comprises for (5) step, porous aerogel layer outermost surface insulating unit outwardly, and its surperficial also compound one deck single face sets in advance the base material of aluminium coated.
Thermal isolation film preparation method is characterized in that, (2) described aerosil is nano-scale particle, is modulated into dispersing agent to be coated with after watery.Dispersing agent can adopt the varnish of using in printing.First be modulated into and wateryly be coated with again the thickness minimum that can fully guarantee the silicon dioxide aerogel layer can to reach 0.01mm even thinner, and guarantee that coating is even.
Thermal isolation film of the present invention, being composited of multilayer insulation cell formation, every layer of insulating unit is comprised of substrate layer and aerogel layer; Described substrate layer is polyimide or carbon-fiber film, and described aerogel layer is the porous silica aerogel.Polyimide or carbon-fiber film itself have heat-blocking action, and temperature resistant range plays skeleton function to thermal isolation film at least between-269 degrees centigrade to 400 degrees centigrade; The porous silica aerogel has the high porosity, has very effectively stoped convection current and the solid conduction of heat from many pores; Thermal isolation film of the present invention is had an effect step by step by the multilayer insulation unit, prevents that the gas in each layer porous silica aerogel from flowing mutually, and effect of heat insulation is better.Thermal isolation film of the present invention is a kind of film, compares with asbestos material, and little many of volume, and only need carry out simple cutting and can directly use have a volume little easy to use.Compared with prior art, thermal isolation film of the present invention is harmless, and can not cause environmental pollution to the same asbestos that splash towards periphery of asbestos material.Another technological scheme of the present invention is the preparation method of above-mentioned thermal isolation film, thereby proposes as an application.
Embodiment
The invention will be further described below in conjunction with accompanying drawing.
With reference to figure 1, first embodiment of the present invention is a kind of thermal isolation film, has stratiform structure, and the film structure of this thermal isolation film is being composited of multilayer insulation cell formation, and each layer insulating unit arranges in the same way; Every layer of insulating unit is comprised of substrate layer 101 and aerogel layer 102; Described substrate layer 101 is polyimide or carbon-fiber film, and described aerogel layer 102 is porous silica aerogels; And, also have a high temperature glue-line 103 between adjacent insulating unit.Described porous silica aerogel layer is made of the porous silica aerogel particle, and described porous silica aerogel particle is nano-scale particle.The outside of outermost substrate layer also is provided with an aluminium coated 104; In the present embodiment, the number of plies of described insulating unit is 4 layers; The thickness of described substrate layer is a=0.03mm; The thickness of described aerogel layer is b=0.05mm.
Second embodiment of the present invention is also a kind of thermal isolation film, is with the difference of first embodiment of the invention, and described insulating unit has 10 layers.
The 3rd embodiment of the present invention is also a kind of thermal isolation film, is with first embodiment's of the present invention difference, and the outside of outermost substrate layer is provided with a silver plating layer, rather than aluminium coated.
The 4th embodiment of the present invention is also a kind of thermal isolation film, is with first embodiment's of the present invention difference, and outermost two faces of this thermal isolation film are equipped with aluminium coated; A base material side outwardly uses the base material that pre-sets aluminium coated to make described insulating unit; The another compound one deck of an aerogel layer side outwardly pre-sets the base material of aluminium coated.
With reference to figure 2, the 5th embodiment of the present invention is a kind of preparation method of thermal isolation film, comprises the following steps:
(1) provide base material;
(2) at base material single face coated gas gel;
(3) semi-finished product of (2) step being made are dried into insulating unit;
(4) the multilayer insulation unit is compound;
Wherein, (1) alleged base material of step is polyimide or carbon-fiber film; (2) alleged aerogel of step is the porous silica aerogel; (4) step alleged compound be compound with pressure after inserting high-temp glue between two layers of insulating unit, and each insulating unit arranges in the same way.Wherein, (2) described aerosil is nano-scale particle, is modulated into dispersing agent to be coated with after watery.Dispersing agent can adopt the varnish of using in printing.
The 6th embodiment of the present invention is a kind of conversion to fifth embodiment of the invention, is with the 5th embodiment's difference, replaces the alleged coating of (2) step in the mode of printing or spraying.
The 7th embodiment of the present invention is also a kind of conversion to fifth embodiment of the invention, be with the 5th embodiment's difference, substrate layer outermost surface insulating unit outwardly, its (1) step single face that provides sets in advance the base material of aluminium coated.For the thermal isolation film that scratch resistant demand is arranged, aluminium coated can be arranged on the substrate layer inboard.
The 8th embodiment of the present invention is also a kind of conversion to seventh embodiment of the invention, be with the 7th embodiment's difference, and porous aerogel layer outermost surface insulating unit outwardly, its surface also compound one deck single face sets in advance the base material of aluminium coated.