CN115404019B - TPU heat-insulating explosion-proof film for high infrared barrier automobile skylight - Google Patents
TPU heat-insulating explosion-proof film for high infrared barrier automobile skylight Download PDFInfo
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- C09—DYES; PAINTS; POLISHES; NATURAL RESINS; ADHESIVES; COMPOSITIONS NOT OTHERWISE PROVIDED FOR; APPLICATIONS OF MATERIALS NOT OTHERWISE PROVIDED FOR
- C09J—ADHESIVES; NON-MECHANICAL ASPECTS OF ADHESIVE PROCESSES IN GENERAL; ADHESIVE PROCESSES NOT PROVIDED FOR ELSEWHERE; USE OF MATERIALS AS ADHESIVES
- C09J7/00—Adhesives in the form of films or foils
- C09J7/20—Adhesives in the form of films or foils characterised by their carriers
- C09J7/29—Laminated material
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- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08G—MACROMOLECULAR COMPOUNDS OBTAINED OTHERWISE THAN BY REACTIONS ONLY INVOLVING UNSATURATED CARBON-TO-CARBON BONDS
- C08G18/00—Polymeric products of isocyanates or isothiocyanates
- C08G18/06—Polymeric products of isocyanates or isothiocyanates with compounds having active hydrogen
- C08G18/28—Polymeric products of isocyanates or isothiocyanates with compounds having active hydrogen characterised by the compounds used containing active hydrogen
- C08G18/30—Low-molecular-weight compounds
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- C08G—MACROMOLECULAR COMPOUNDS OBTAINED OTHERWISE THAN BY REACTIONS ONLY INVOLVING UNSATURATED CARBON-TO-CARBON BONDS
- C08G18/00—Polymeric products of isocyanates or isothiocyanates
- C08G18/06—Polymeric products of isocyanates or isothiocyanates with compounds having active hydrogen
- C08G18/28—Polymeric products of isocyanates or isothiocyanates with compounds having active hydrogen characterised by the compounds used containing active hydrogen
- C08G18/40—High-molecular-weight compounds
- C08G18/42—Polycondensates having carboxylic or carbonic ester groups in the main chain
- C08G18/4266—Polycondensates having carboxylic or carbonic ester groups in the main chain prepared from hydroxycarboxylic acids and/or lactones
- C08G18/4269—Lactones
- C08G18/4277—Caprolactone and/or substituted caprolactone
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- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08G—MACROMOLECULAR COMPOUNDS OBTAINED OTHERWISE THAN BY REACTIONS ONLY INVOLVING UNSATURATED CARBON-TO-CARBON BONDS
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- C08G18/6637—Compounds of group C08G18/42 with compounds of group C08G18/32 or polyamines of C08G18/38
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- C09J2203/00—Applications of adhesives in processes or use of adhesives in the form of films or foils
- C09J2203/354—Applications of adhesives in processes or use of adhesives in the form of films or foils for automotive applications
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- C09J2400/00—Presence of inorganic and organic materials
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- C09J2400/163—Metal in the substrate
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- C09J2433/00—Presence of (meth)acrylic polymer
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- C09J2475/00—Presence of polyurethane
- C09J2475/006—Presence of polyurethane in the substrate
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Abstract
The invention provides a TPU heat-insulating explosion-proof film for a high infrared barrier automobile skylight, which comprises a base paper layer, an installation adhesive layer, a second substrate layer, a metal coating layer with high infrared reflection performance, a first substrate layer, a self-repairing layer and a protective layer which are sequentially arranged, wherein the first substrate layer and the second substrate layer are both made of optical TPU, and the self-repairing layer is made of coating with a self-repairing function.
Description
Technical Field
The invention belongs to the technical field of explosion-proof films, and particularly relates to a TPU heat-insulating explosion-proof film for a high infrared barrier automobile skylight.
Background
Sunroof has become contemporary automobile standard and accessory terminology. However, in summer the main source of heat comes from sunroofs, especially panoramic sunroofs, account for about 60% or more of the automobile. Therefore, the head top of the driver is provided with a 'little sun' in the invisible state of parking insolation or sun driving, and the vehicle is more an avatar food steamer, so that the driver is difficult to sit and sit. In addition, panoramic sunroof has some potential safety hazard. In the sudden accident, panoramic glass can become tiny particles due to the characteristics of the panoramic glass after being impacted, so that certain safety risks can be caused for personnel in the automobile, and the toughened glass has certain self-explosion probability.
The films attached to automobile sunroofs in the current market are divided into three types: the first type of inner film is that heat firstly passes through glass and then reaches the film, the glass absorbs about 30% of infrared heat in the process, and the glass heats up quickly due to the heat reflected by part of the film, so that the whole automobile heats up quickly due to infrared radiation and heat conduction, and the film also has no explosion-proof function. The second type of external film is that heat is absorbed, infrared heat is absorbed by using a heat absorber coated on the surface of the transparent polyester film to achieve the aim of heat insulation, excellent heat insulation effect is generated in a short time, but secondary heat radiation is generated in a far infrared mode after saturation, the heat absorption capacity is reduced along with ageing of glue, and meanwhile, the explosion-proof function is poor. The third type of external film is that heat is reflected, and a plurality of layers of noble metals are sputtered on a transparent polyester film to reflect infrared heat, so that the aim of heat insulation is fulfilled, but the adopted optical grade polyester substrate is poor in weather resistance, hard in texture and relatively poor in heat insulation and explosion-proof functions.
Disclosure of Invention
The present invention has been made to solve the above problems, and an object of the present invention is to provide a TPU heat-insulating explosion-proof film for a sunroof of a high infrared barrier automobile, which has excellent properties of blocking ultraviolet rays, blocking heat, repairing scratches, preventing glare, preventing explosion, and the like.
The invention provides a TPU heat-insulating explosion-proof film for a high infrared barrier automobile skylight, which is characterized by comprising the following components: the base paper layer, the mounting adhesive layer, the second substrate layer, the metal coating layer with high infrared reflection performance, the first substrate layer, the self-repairing layer and the protective layer are sequentially arranged,
the first substrate layer and the second substrate layer are both made of optical TPU, the self-repairing layer is made of paint with self-repairing function,
the optical TPU is prepared by adopting a high-temperature melt polymerization method, and the specific preparation method is as follows:
the raw materials for preparing the optical grade TPU comprise the following substances in parts by weight:
45-60 parts of Polycaprolactone (PCL) with Mn less than 5000 g/moL;
25-40 parts of any one of hexamethylene diisocyanate type polyurethane elastomer (HDI), isophorone diisocyanate type polyurethane elastomer (IPDI), dicyclohexylmethane-4, 4' -diisocyanate type polyurethane elastomer (HMDI), xylylene diisocyanate type polyurethane elastomer (XDI) and tetramethyl isophthalene diisocyanate type polyurethane elastomer (TMXDI);
adding the raw materials into a dynamic or static mixer according to the parts by weight, mixing for 4-9 hours at the temperature of 85-95 ℃, and then adding the reacted materials into a double-screw granulating system for reactive extrusion granulation to obtain the optical TPU particles.
Furthermore, the TPU heat-insulating explosion-proof film for the high infrared barrier automobile skylight provided by the invention has the following characteristics: the metal coating layer is made of at least one of noble metals nickel, chromium, titanium, platinum and silver with infrared high reflection characteristic.
Furthermore, the TPU heat-insulating explosion-proof film for the high infrared barrier automobile skylight provided by the invention has the following characteristics: the material of the installation glue layer is acrylic ester adhesive.
Furthermore, the TPU heat-insulating explosion-proof film for the high infrared barrier automobile skylight provided by the invention has the following characteristics: and the bottom paper layer and the protective layer are both made of reticulate pattern structure release films.
Furthermore, the TPU heat-insulating explosion-proof film for the high infrared barrier automobile skylight provided by the invention has the following characteristics: the thickness of the mounting adhesive layer is 20-30 mu m, the thickness of the metal coating layer is 2-5 nm, and the thickness of the self-repairing layer is 8-10 mu m.
Furthermore, the TPU heat-insulating explosion-proof film for the high infrared barrier automobile skylight provided by the invention has the following characteristics: the thickness of the first substrate layer is 200 mu m, the thickness of the second substrate layer is 100 mu m, the thickness of the bottom paper layer is 75 mu m, and the thickness of the protective layer is 50 mu m.
The invention also provides a method for preparing the TPU heat-insulating explosion-proof film for the high infrared barrier automobile skylight, which is characterized by comprising the following steps of:
step S1, extruding and molding the optical TPU particles in the TPU heat-insulating explosion-proof film for the high infrared barrier automobile skylight through a casting machine to prepare a TPU layer.
And S2, sputtering a metal coating layer on one side surface of the TPU layer prepared in the step S1 by adopting a vacuum magnetron sputtering process.
And S3, forming a TPU layer on the other side surface of the TPU layer prepared in the step S1 by adopting an in-film coextrusion process by using the optical TPU particles, wherein the TPU layer and the TPU layer prepared in the step S1 are used as a first substrate layer together, and a second substrate layer is formed on the metal coating layer.
And S4, coating a coating with a self-repairing function on the first substrate layer to form a self-repairing layer.
And S5, coating a reactive acrylic adhesive on the second substrate layer to form a mounting adhesive layer.
And S6, respectively attaching a release film on the self-repairing layer and the mounting adhesive layer to form a protective layer and a bottom paper layer.
Furthermore, the TPU heat-insulating explosion-proof film for the high infrared barrier automobile skylight provided by the invention has the following characteristics: in the step S1, the temperature setting interval of each section of the screw in the casting machine is as follows: the temperature of the first feeding section is set to be 190-210 ℃; setting the temperature of the second melting section to 195-215 ℃; the temperature of the homogenization section of the third section is set to be 190-210 ℃; the die temperature interval is: 190-210 ℃.
Furthermore, the TPU heat-insulating explosion-proof film for the high infrared barrier automobile skylight provided by the invention has the following characteristics: in the step S2, the parameters of the vacuum magnetron sputtering process are set as follows: vacuum degree is 0.1-10Pa, sputtering air pressure is 1.0-3.0Pa, sputtering power is 100-110W, ar flow is 100-300sccm.
The invention has the following advantages:
the TPU heat-insulating explosion-proof film for the high infrared barrier automobile skylight is based on a magnetron sputtering process, belongs to reflected heat, is made of optical TPU, and is prepared from aliphatic and polycaprolactone serving as main raw materials, so that the TPU heat-insulating explosion-proof film disclosed by the invention has the advantages of combining the functions of invisible automobile clothing and a heat-insulating film, and has excellent performances of ultraviolet ray blocking, heat blocking, scratch repairing, scratch preventing, anti-glare, explosion preventing and the like. After actual use, the following functions are achieved: (1) The heat insulation effect is obvious, and the scraping and impact performance of the skylight is improved; (2) the air conditioner has obvious refrigerating effect and does not feel sunny; (3) The protective effect on the interior trim of the automobile is achieved, and the aging of the electronic devices of the automobile and the fading of the interior trim can be slowed down; (4) the vehicle isolation ultraviolet ray effect after film pasting is good; (5) The anti-dizziness automobile can prevent dizziness, when the automobile is driven at night, if light irradiates outside, the sight of a driver can be influenced, the reflection on the vehicle glass after film pasting is not obvious, and things outside can be clearly seen.
Drawings
Fig. 1 is a schematic structural view of a TPU heat insulation explosion-proof film for a sunroof of a high infrared barrier automobile in an embodiment of the invention.
Detailed Description
In order to make the technical means, creation characteristics, achievement purposes and effects achieved by the invention easy to understand, the following embodiments specifically describe the TPU heat insulation explosion-proof film for the high infrared barrier automobile skylight with reference to the accompanying drawings.
Example 1
As shown in fig. 1, the TPU heat insulation explosion protection film 100 for a high infrared barrier sunroof includes: the adhesive comprises a base paper layer 10, an installation adhesive layer 20, a second substrate layer 30, a metal coating layer 40, a first substrate layer 50, a self-repairing layer 60 and a protective layer 70. The base paper layer 10, the mounting adhesive layer 20, the third substrate layer 30, the metal coating layer 40, the first substrate layer 50, the self-repairing layer 60 and the protective layer 70 are sequentially arranged. When in use, the bottom paper layer 10 and the protective layer 70 are torn off, and the installation adhesive layer 20 is adhered to the outer side of the automobile skylight.
In this embodiment, the material of the mounting adhesive layer 20 is an acrylate adhesive, and specifically, the material of the mounting adhesive layer 20 is a reactive acrylic adhesive. The reactive acrylic adhesive has the advantages of ageing resistance, solvent resistance, high cohesion and high viscosity. Specifically, the thickness of the mounting adhesive layer is 20-30 mu m. The mounting adhesive layer 20 has moderate adhesive force and good cohesive force, and can be well adhered to the surface of the skylight during use, and the mounting adhesive layer cannot be lifted and fall off; on the other hand, the adhesive has excellent wet and hot weather aging resistance, and the adhesive is not transferred after being adhered to the surface of the skylight and subjected to long-time insolation and rain; the adhesive is easy to remove after being subjected to the actions of heat, ultraviolet light, moisture and the like under the use condition, and no residual adhesive is left, so that the surface to be protected is not polluted; and when the skylight is severely damaged to cause glass breakage, the glass can be continuously and completely adhered, so that the glass is prevented from hurting people, and the safety and protection are further improved.
The metal plating layer 40 has high infrared reflection performance. In the present embodiment, the metal coating layer 40 is made of at least one of noble metals nickel, chromium, titanium, platinum and silver with high infrared reflection property. Specifically, the thickness of the metal coating layer is 2-5 nm. The metal coating layer 40 can ensure excellent heat insulation function, clear light transmittance, extremely low light reflection and permanent color fastness of the product.
The first substrate layer 50 and the second substrate layer 30 are both optical TPU. The optical grade TPU is prepared by adopting a high-temperature melt polymerization method. The raw materials for preparing the optical grade TPU comprise the following substances in parts by weight: 45-60 parts of polycaprolactone with Mn less than 5000 g/moL; 25-40 parts of any one of hexamethylene diisocyanate type polyurethane elastomer, isophorone diisocyanate type polyurethane elastomer, dicyclohexylmethane-4, 4' -diisocyanate type polyurethane elastomer, xylylene diisocyanate type polyurethane elastomer and tetramethyl m-xylylene diisocyanate type polyurethane elastomer; 4-16 parts of chain extender; 2-8 parts of an initiator; 2-8 parts of UV auxiliary agent; 2-8 parts of a flame retardant; 2-8 parts of an antioxidant. And adding the raw materials into a dynamic or static mixer according to the parts by weight, quickly mixing, drying, and then adding the dried materials into a double-screw granulating system for reactive extrusion granulation to obtain the optical TPU particles. The optical TPU molecule does not contain benzene ring or stabilizer, and has high light transmittance, excellent tear resistance, wear resistance, high scratch resistance, puncture resistance, high impact resistance, environmental corrosion resistance, good damping characteristic, high rebound resilience, low atomization value, highest UV grade 5, permanent yellowing resistance and hydrolysis resistance.
Specifically, the thickness of the second substrate layer 30 is 100 μm, and the thickness of the first substrate layer 50 is 200 μm.
The self-repairing layer 60 is made of a coating with a self-repairing function, the self-repairing layer 60 can realize intrinsic self-repairing, namely, no external substance is required to be added, the self-repairing layer has the advantages of being high in recovery speed and capable of repairing the same position for many times, and scratches or cracks at the damaged position can be automatically repaired when the material is damaged, so that the service life of the skylight TPU protective film is prolonged. Specifically, the self-repairing layer 60 is made of a coating material with high barrier, hydrophobic and self-repairing functions. Specifically, the thickness of the self-healing layer 60 is 8 to 10 μm.
In this embodiment, the backing paper layer 10 and the protective layer 70 are both textured release films, which is convenient for use. Specifically, the thickness of the base paper layer 10 is 75 μm, and the thickness of the protective layer 70 is 50 μm.
Example two
The preparation method of the TPU heat-insulating explosion-proof film 100 for the high infrared barrier automobile skylight comprises the following steps:
and S1, preparing optical TPU particles by adopting a high-temperature melt polymerization method. 55 parts of polycaprolactam with Mn less than 5000g/moL, 30 parts of IPDI, 6 parts of 1, 4-butanediol, 2 parts of ammonium persulfate, 2 parts of UV-329 and 2 parts of200Fine, 3 parts565, adding the mixture into a static mixer, mixing for 5 hours at the temperature of 90 ℃, and then adding the reacted material into a double-screw granulating system for reactive extrusion granulation to obtain optical TPU particles.
And S2, extruding and molding the prepared optical TPU particles through a casting machine to prepare a TPU layer with the thickness of 100 mu m. The thickness is controlled by an on-line monitoring device. The temperature setting interval of each section of the screw in the casting machine is as follows: the temperature of the first feeding section is set to 195 ℃, the temperature of the second melting section is set to 200 ℃, the temperature of the third homogenizing section is set to 195 ℃, and the temperature interval of the die head is set to 195 ℃.
And S3, sputtering silver with the thickness of 2nm on one side surface of the TPU layer prepared in the step S2 by adopting a vacuum magnetron sputtering process to form the metal coating layer 40. And sputtering a double layer during sputtering, wherein the thickness of the double layer is 2nm, and the thickness of the metal coating layer is automatically controlled by a film thickness monitor. The vacuum magnetron sputtering parameters are as follows: the vacuum degree was 2.0Pa, the sputtering gas pressure was 1.0Pa, the sputtering power was 110W, and the Ar flow rate was 150sccm.
And S4, forming a TPU layer with the thickness of 100 mu m on the other side surface of the TPU layer prepared in the step S2 by adopting an in-film coextrusion process by using the optical TPU particles prepared in the step S1, wherein the TPU layer and the TPU layer prepared in the step S2 are the first substrate layer 50 together, the total thickness of the first substrate layer 50 is 200 mu m, and the second substrate layer 30 with the thickness of 100 mu m is formed on the metal coating layer 40. The thickness is controlled by an on-line monitoring device. All pollutants are almost completely eradicated by adopting in-mold coextrusion production, and an extremely thin film or an extremely thick film can be extruded without directly compounding by an additional coating adhesive layer.
In step S5, a coating material having a self-repairing function is coated on the first substrate layer 50 to form a self-repairing layer 60 having a thickness of 8 μm. The thickness is controlled by an on-line monitoring device.
In step S5, a reactive acrylic adhesive is coated on the second substrate layer 30 to form the mounting paste layer 20 having a thickness of 24 μm. The thickness is controlled by an on-line monitoring device.
In step S6, a protective layer 70 with a thickness of 50 μm and a base paper layer 10 with a thickness of 75 μm are respectively formed by attaching a release film to the self-repairing layer 60 and the mounting adhesive layer 20.
Example III
The preparation method of the TPU heat-insulating explosion-proof film 100 for the high infrared barrier automobile skylight comprises the following steps:
and S1, preparing optical TPU particles by adopting a high-temperature melt polymerization method. 60 parts of polycaprolactam with Mn less than 5000g/moL, 40 parts of HMDI, 16 parts of 1, 4-butanediol, 5 parts of ammonium persulfate, 8 parts of UV-329 and 8 parts of200Fine, 8 parts565, adding the mixture into a dynamic mixer, mixing for 9 hours at the temperature of 85 ℃, and then adding the reacted material into a double-screw granulating system for reactive extrusion granulation to obtain optical TPU particles.
And S2, extruding and molding the prepared optical TPU particles through a casting machine to prepare a TPU layer with the thickness of 100 mu m. The thickness is controlled by an on-line monitoring device. The temperature setting interval of each section of the screw in the casting machine is as follows: the temperature of the first feeding section was set at 190 ℃, the temperature of the second melting section was set at 215 ℃, the temperature of the third homogenizing section was set at 210 ℃, and the temperature interval of the die head was set at 210 ℃.
And S3, sputtering nickel with the thickness of 3nm on one side surface of the TPU layer prepared in the step S2 by adopting a vacuum magnetron sputtering process to form the metal coating layer 40. And sputtering a double layer during sputtering, wherein the thickness of the double layer is 3nm, and the thickness of the metal coating layer is automatically controlled by a film thickness monitor. The vacuum magnetron sputtering parameters are as follows: the vacuum degree was 0.1Pa, the sputtering pressure was 2.0Pa, the sputtering power was 110W, and the Ar flow rate was 100sccm.
And S4, forming a TPU layer with the thickness of 100 mu m on the other side surface of the TPU layer prepared in the step S2 by adopting an in-film coextrusion process by using the optical TPU particles prepared in the step S1, wherein the TPU layer and the TPU layer prepared in the step S2 are the first substrate layer 50 together, the total thickness of the first substrate layer 50 is 200 mu m, and the second substrate layer 30 with the thickness of 100 mu m is formed on the metal coating layer 40. The thickness is controlled by an on-line monitoring device. All pollutants are almost completely eradicated by adopting in-mold coextrusion production, and an extremely thin film or an extremely thick film can be extruded without directly compounding by an additional coating adhesive layer.
In step S5, a paint having a self-repairing function is coated on the first substrate layer 50 to form a self-repairing layer 60 having a thickness of 9 μm. The thickness is controlled by an on-line monitoring device.
In step S6, a reactive acrylic adhesive is coated on the second substrate layer 30 to form the mounting paste layer 20 having a thickness of 20 μm. The thickness is controlled by an on-line monitoring device.
In step S7, a protective layer 70 having a thickness of 50 μm and a base paper layer 10 having a thickness of 75 μm are formed by laminating a release film on the self-repairing layer 60 and the mounting adhesive layer 20, respectively.
Example IV
And S1, preparing optical TPU particles by adopting a high-temperature melt polymerization method. 45 parts of polycaprolactam with Mn less than 5000g/moL, 25 parts of HDI, 4 parts of 1, 4-butanediol, 8 parts of ammonium persulfate, 4 parts of UV-329 and 4 parts of200Fine, 2 parts->565, adding the mixture into a static mixer, mixing for 4 hours at the temperature of 95 ℃, and then adding the reacted material into a double-screw granulating system for reactive extrusion granulation to obtain optical TPU particles.
And S2, extruding and molding the prepared optical TPU particles through a casting machine to prepare a TPU layer with the thickness of 100 mu m. The thickness is controlled by an on-line monitoring device. The temperature setting interval of each section of the screw in the casting machine is as follows: the temperature of the first feeding section is set to 210 ℃, the temperature of the second melting section is set to 195 ℃, the temperature of the third homogenizing section is set to 190 ℃, and the temperature interval of the die head is set to 190 ℃.
And S3, sputtering a platinum and silver mixture with the thickness of 5nm on one side surface of the TPU layer prepared in the step S2 by adopting a vacuum magnetron sputtering process to form the metal coating layer 40. And sputtering a double layer during sputtering, wherein the thickness of the double layer is 5nm, and the thickness of the metal coating layer is automatically controlled by a film thickness monitor. The vacuum magnetron sputtering parameters are as follows: the vacuum degree was 10Pa, the sputtering air pressure was 3.0Pa, the sputtering power was 110W, and the Ar flow rate was 300sccm.
And S4, forming a TPU layer with the thickness of 100 mu m on the other side surface of the TPU layer prepared in the step S2 by adopting an in-film coextrusion process by using the optical TPU particles prepared in the step S1, wherein the TPU layer and the TPU layer prepared in the step S2 are the first substrate layer 50 together, the total thickness of the first substrate layer 50 is 200 mu m, and the second substrate layer 30 with the thickness of 100 mu m is formed on the metal coating layer 40. The thickness is controlled by an on-line monitoring device. All pollutants are almost completely eradicated by adopting in-mold coextrusion production, and an extremely thin film or an extremely thick film can be extruded without directly compounding by an additional coating adhesive layer.
In step S5, a paint having a self-repairing function is coated on the first substrate layer 50 to form a self-repairing layer 60 having a thickness of 10 μm. The thickness is controlled by an on-line monitoring device.
In step S6, a reactive acrylic adhesive is coated on the second substrate layer 30 to form the mounting paste layer 20 having a thickness of 30 μm. The thickness is controlled by an on-line monitoring device.
In step S7, a protective layer 70 having a thickness of 50 μm and a base paper layer 10 having a thickness of 75 μm are formed by laminating a release film on the self-repairing layer 60 and the mounting adhesive layer 20, respectively.
And (3) testing: the TPU heat-insulating explosion-proof films for high infrared barrier sunroofs and the market reflection films prepared in example 2, example 3 and example 4 were tested for light transmittance, infrared barrier property, ultraviolet barrier property, infrared transmittance, infrared reflection, oil resistance pen performance, carburetor resistance performance and sand and stone impact resistance (60 s), and the test results are shown in table 1.
Table 1.
As can be seen from Table 1, the TPU heat-insulating explosion-proof film 100 for the high infrared barrier automobile skylight has higher light transmittance, infrared barrier rate and infrared reflection quantity compared with the conventional reflection film, has lower infrared transmission quantity and better scratch and explosion prevention performance.
The above embodiments are preferred examples of the present invention, and are not intended to limit the scope of the present invention.
Claims (9)
1. TPU thermal-insulated explosion-proof membrane for high infrared separation sunroof, characterized by, include:
the base paper layer, the mounting adhesive layer, the second substrate layer, the metal coating layer with high infrared reflection performance, the first substrate layer, the self-repairing layer and the protective layer are sequentially arranged,
the first substrate layer and the second substrate layer are both made of optical TPU, the self-repairing layer is made of paint with self-repairing function,
the optical TPU is prepared by adopting a high-temperature melt polymerization method, and the specific preparation method is as follows:
the raw materials for preparing the optical grade TPU comprise the following substances in parts by weight:
45-60 parts of polycaprolactone with Mn less than 5000 g/moL;
hexamethylene diisocyanate type polyurethane elastomer, isophorone diisocyanate type polyurethane elastomer, dicyclohexylmethane-4, 4' -diisocyanate type polyurethane elastomer, xylylene diisocyanate type polyurethane elastomer, tetramethyl m-xylylene diisocyanate type polyurethane elastomer
Adding the raw materials into a dynamic or static mixer according to the parts by weight, mixing for 4-9 hours at the temperature of 85-95 ℃, and then adding the reacted materials into a double-screw granulating system for reactive extrusion granulation to obtain the optical TPU particles.
2. The TPU heat insulation explosion proof film for a high infrared barrier sunroof according to claim 1, wherein:
the metal coating layer is made of at least one of noble metals nickel, chromium, titanium, platinum and silver with infrared high reflection characteristic.
3. The TPU heat insulation explosion proof film for a high infrared barrier sunroof according to claim 1, wherein:
the material of the installation glue layer is acrylic ester adhesive.
4. The TPU heat insulation explosion proof film for a high infrared barrier sunroof according to claim 1, wherein:
and the bottom paper layer and the protective layer are both made of reticulate pattern structure release films.
5. The TPU heat insulation explosion proof film for a high infrared barrier sunroof according to claim 1, wherein:
the thickness of the mounting adhesive layer is 20-30 mu m, the thickness of the metal coating layer is 2-5 nm, and the thickness of the self-repairing layer is 8-10 mu m.
6. The TPU heat insulation explosion proof film for a high infrared barrier sunroof according to claim 1, wherein:
the thickness of the first substrate layer is 200 mu m, the thickness of the second substrate layer is 100 mu m, the thickness of the bottom paper layer is 75 mu m, and the thickness of the protective layer is 50 mu m.
7. A method for preparing the TPU heat insulation explosion-proof film for the high infrared barrier automobile skylight of any one of claims 1-6, which is characterized by comprising the following steps:
step S1, extruding optical TPU particles in the TPU heat-insulating explosion-proof film for the high infrared barrier automobile skylight according to claim 1 through a casting machine to prepare a TPU layer;
step S2, sputtering a metal coating layer on one side surface of the TPU layer prepared in the step S1 by adopting a vacuum magnetron sputtering process;
step S3, forming a TPU layer on the other side surface of the TPU layer prepared in the step S1 by adopting an in-film coextrusion process by using the optical TPU particles, wherein the TPU layer and the TPU layer prepared in the step S1 are used as a first substrate layer together, and a second substrate layer is formed on the metal coating layer;
s4, coating a coating with a self-repairing function on the first substrate layer to form a self-repairing layer;
s5, coating a reactive acrylic adhesive on the second substrate layer to form an installation adhesive layer;
and S6, respectively attaching a release film on the self-repairing layer and the mounting adhesive layer to form a protective layer and a bottom paper layer.
8. The method of manufacturing according to claim 7, wherein:
in the step S1, the temperature setting interval of each section of the screw in the casting machine is as follows: the temperature of the first feeding section is set to be 190-210 ℃; setting the temperature of the second melting section to 195-215 ℃; the temperature of the homogenization section of the third section is set to be 190-210 ℃; the die temperature interval is: 190-210 ℃.
9. The method of manufacturing according to claim 7, wherein:
in the step S2, the parameters of the vacuum magnetron sputtering process are set as follows: vacuum degree is 0.1-10Pa, sputtering air pressure is 1.0-3.0Pa, sputtering power is 100-110W, ar flow is 100-300sccm.
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