CN112009052A - Preparation method of PET-based heat reflection film - Google Patents
Preparation method of PET-based heat reflection film Download PDFInfo
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- CN112009052A CN112009052A CN202010868125.1A CN202010868125A CN112009052A CN 112009052 A CN112009052 A CN 112009052A CN 202010868125 A CN202010868125 A CN 202010868125A CN 112009052 A CN112009052 A CN 112009052A
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- pet
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- aluminum plate
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B32—LAYERED PRODUCTS
- B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
- B32B27/00—Layered products comprising a layer of synthetic resin
- B32B27/18—Layered products comprising a layer of synthetic resin characterised by the use of special additives
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
- B29D—PRODUCING PARTICULAR ARTICLES FROM PLASTICS OR FROM SUBSTANCES IN A PLASTIC STATE
- B29D7/00—Producing flat articles, e.g. films or sheets
- B29D7/01—Films or sheets
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B32—LAYERED PRODUCTS
- B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
- B32B15/00—Layered products comprising a layer of metal
- B32B15/20—Layered products comprising a layer of metal comprising aluminium or copper
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B32—LAYERED PRODUCTS
- B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
- B32B27/00—Layered products comprising a layer of synthetic resin
- B32B27/06—Layered products comprising a layer of synthetic resin as the main or only constituent of a layer, which is next to another layer of the same or of a different material
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B32—LAYERED PRODUCTS
- B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
- B32B27/00—Layered products comprising a layer of synthetic resin
- B32B27/36—Layered products comprising a layer of synthetic resin comprising polyesters
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B32—LAYERED PRODUCTS
- B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
- B32B37/00—Methods or apparatus for laminating, e.g. by curing or by ultrasonic bonding
- B32B37/06—Methods or apparatus for laminating, e.g. by curing or by ultrasonic bonding characterised by the heating method
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B32—LAYERED PRODUCTS
- B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
- B32B37/00—Methods or apparatus for laminating, e.g. by curing or by ultrasonic bonding
- B32B37/10—Methods or apparatus for laminating, e.g. by curing or by ultrasonic bonding characterised by the pressing technique, e.g. using action of vacuum or fluid pressure
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B32—LAYERED PRODUCTS
- B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
- B32B2307/00—Properties of the layers or laminate
- B32B2307/40—Properties of the layers or laminate having particular optical properties
- B32B2307/416—Reflective
Abstract
A preparation method of a PET-based heat reflection film comprises the following steps: (1) by means of nano SiO2Modifying PET with the particles to obtain modified PET; (2) the modified PET raw material is subjected to pre-crystallization and drying treatment, then enters an extruder for melting and plasticizing, and then passes through a pre-filter, a metering pump and a main filter to be subjected to die head; the static adsorption device is pressed on the quenching wheel to be rapidly cooled to form a casting sheet,then the fiber is sequentially stretched longitudinally and transversely. The base film is subjected to shaping, cooling, thickness measurement, edge cutting, static elimination treatment and online winding to obtain a PET thermal composite film; (3) covering the PET thermal composite film on an aluminum plate, and feeding the aluminum plate into a hot press for hot press molding. The PET film is used as a metal plate surface coating film with excellent performance, and has excellent wear resistance, heat resistance and better mechanical performance; the invention uses nano SiO2The PET film is subjected to surface modification by the particles, and when the PET film is coated on a metal plate, the adhesive in the middle layer is not required to be coated, so that the PET film can play a role in coating the film and can also play a role in gluing.
Description
Technical Field
The invention relates to the technical field of protective films compounded on metal materials, in particular to a preparation method of a PET-based heat reflection film.
Background
For a long time, a main method for performing a corrosion-resistant treatment on a metal material is to coat a metal surface, and examples of a polymer thin film used for coating a metal material include PP, PA, PE, PET, and the like. The PET film has the advantages of optimal comprehensive performance, easy molding, bacteriostasis, high hardness, high temperature resistance, wear resistance, special treatment and printing and the like. At present, the effective adhesion of PET and a substrate by coating an adhesive is a common method.
For example, chinese patent publication No. CN101143502A discloses a method for manufacturing a coated metal plate, which comprises: 1) surface treating the substrate to reach the state of the substrate required by coating; 2) coating primer on the front surface of the substrate subjected to surface treatment, and coating back paint on the back surface of the substrate; 3) coating an adhesive on the front surface of the substrate; 4) and adhering a PET film on the substrate coated with the adhesive. The adhesive is coated on the primer on the front surface of the substrate, and then the PET film layer is bonded, so that the effective bonding of the PET film and the coated substrate can be effectively realized. However, in the preparation or use and treatment processes of the common adhesive, toxic or harmful and irritant substances are generated, so that the problem of environmental protection is brought; the heat curing thereof usually takes 5 days; the adhesive has the defects of low yield, low production efficiency, high production cost, poor anti-falling performance, low peel strength, no ultraviolet resistance and the like; particularly, under the condition of continuous change of conditions such as climate, environment and the like, the coating on the surface of the metal plate is easy to fall off, so that the base layer of the metal plate is exposed and is easy to be corroded; under a high-temperature environment, the film on the surface of the metal plate is yellowed and falls off integrally, so that the appearance of the product is seriously influenced; in addition, the global heat island effect is serious, and after long-time solar radiation, the temperature of roofs, outer walls and interiors of houses, businesses, offices and the like can be rapidly increased by the metal plates, so that the energy consumption of refrigeration equipment such as air conditioners and the like is increased, and the global greenhouse effect is further increased.
Therefore, the development of a PET film having excellent environmental protection, uv protection, heat resistance, weather resistance, etc., and capable of being effectively attached to an aluminum plate is a major direction of research.
Disclosure of Invention
The invention aims to overcome the defects of the prior art, and provides a preparation method of a PET-based heat reflection film, which comprises the following steps:
(1) by means of nano SiO2Modifying PET with the particles to obtain modified PET;
(2) the modified PET raw material is subjected to pre-crystallization and drying treatment, then enters an extruder for melting and plasticizing, and then passes through a pre-filter, a metering pump and a main filter to be subjected to die head; the static adsorption device presses on the quenching wheel, the casting sheet is formed by rapid cooling, and then the longitudinal stretching and the transverse stretching are carried out in sequence. The base film is subjected to shaping, cooling, thickness measurement, edge cutting, static elimination treatment and online winding to obtain a PET thermal composite film;
(3) covering the PET heat-recombination film on an aluminum plate, and feeding the aluminum plate into a hot press for hot press molding to obtain the PET-based heat-reflection film.
Preferably, in the step (1), the nano SiO2The particle size of the particles is 2-25 nm.
Preferably, in step (2), the longitudinal stretching ratio and the transverse stretching ratio are respectively 3.0-3.6 and 3.4-4.0.
Preferably, in the step (2), the thickness of the PET thermal composite film is 0.02-0.05 mm.
Preferably, in step (3), the thickness of the aluminum plate is 0.06 mm.
Compared with the prior art, the invention has the following advantages:
(1) due to the nanometer SiO2The PET heat composite film has strong ultraviolet shielding capacity and is transparent in the visible light range, and the PET heat composite film has the advantages of no toxicity, heat resistance, weather resistance and excellent ultraviolet resistance by adding the PET heat composite film serving as an ultraviolet-proof additive into PETGood effect and long-acting effect. But also can increase the high-temperature viscosity and the timeliness of the PET thermal composite film; the PET thermal composite film has good adhesive property, and can directly realize effective adhesion between the PET modified film and the metal plate, thereby replacing an adhesive base layer between the PET film and the metal plate.
(2) Tests show that the ultraviolet reflectivity of the PET thermal composite film stuck on the aluminum plate reaches 88%, and the sunlight reflectivity reaches 86%. Compared to adhesives, PET-based heat reflective films will have the following advantages since no heat curing is required: no toxic or irritant substances are generated; the yield is high, the production efficiency is high, and the cost is reduced; the weather resistance and the heat resistance are excellent; the anti-falling performance is good; no yellowing occurs; the peel strength is high; the preparation method has simple process flow and convenient regulation and control by operators.
Detailed Description
For the purpose of enhancing the understanding of the present invention, the present invention will be further described in detail with reference to the following examples, which are provided for the purpose of illustration only and are not intended to limit the scope of the present invention.
Example 1
A preparation method of a PET-based heat reflection film comprises the following steps:
(1) by the particle diameter of 2nm nano SiO2Modifying PET with the particles to obtain modified PET;
(2) the modified PET raw material is subjected to pre-crystallization and drying treatment, then enters an extruder for melting and plasticizing, and then passes through a pre-filter, a metering pump and a main filter to be subjected to die head; the cast sheet is formed by pressing the cast sheet on a quenching wheel by an electrostatic adsorption device and rapidly cooling, and then the cast sheet is sequentially stretched longitudinally and transversely (the longitudinal stretching ratio is 3.0, and the transverse stretching ratio is 3.4). The base film is subjected to shaping, cooling, thickness measurement, edge cutting, static elimination treatment and online winding to obtain a PET thermal composite film;
(3) cleaning, passivating and drying an aluminum plate with the thickness of 0.06mm, compounding the obtained PET thermal composite film with the aluminum plate, and feeding the composite film into a hot press for hot pressing and forming, wherein the curing temperature of a press plate of the hot press is 65 ℃, the heat preservation time is 9min, and the pressure is 3 MPa.
Wherein the thickness of the modified PET film is 0.02 mm.
Example 2
A preparation method of a PET-based heat reflection film comprises the following steps:
(1) passing through SiO with the particle diameter of 6nm2Modifying PET with the particles to obtain modified PET;
(2) the modified PET raw material is subjected to pre-crystallization and drying treatment, then enters an extruder for melting and plasticizing, and then passes through a pre-filter, a metering pump and a main filter to be subjected to die head; the cast sheet is pressed on a quenching wheel by an electrostatic adsorption device, is rapidly cooled to form a cast sheet, and then is sequentially stretched longitudinally and transversely (the longitudinal stretching ratio is 3.2, and the transverse stretching ratio is 3.6). The base film is subjected to shaping, cooling, thickness measurement, edge cutting, static elimination treatment and online winding to obtain a PET thermal composite film;
(3) cleaning, passivating and drying an aluminum plate with the thickness of 0.06mm, compounding the obtained PET thermal composite film with the aluminum plate, and feeding the compounded PET thermal composite film and the aluminum plate into a hot press for hot pressing and forming, wherein the curing temperature of a pressing plate of the hot press is 85 ℃, the heat preservation time is 11min, and the pressure is 4 MPa.
Wherein the thickness of the modified PET film is 0.03 mm.
Example 3
A preparation method of a PET-based heat reflection film comprises the following steps:
(1) passing through SiO with particle size of 12nm2Modifying PET with the particles to obtain modified PET;
(2) the modified PET raw material is subjected to pre-crystallization and drying treatment, then enters an extruder for melting and plasticizing, and then passes through a pre-filter, a metering pump and a main filter to be subjected to die head; the cast sheet is pressed on a quenching wheel by an electrostatic adsorption device, is rapidly cooled to form a cast sheet, and then is sequentially stretched longitudinally and transversely (the longitudinal stretching ratio is 3.4, and the transverse stretching ratio is 3.8). The base film is subjected to shaping, cooling, thickness measurement, edge cutting, static elimination treatment and online winding to obtain a PET thermal composite film;
(3) cleaning, passivating and drying an aluminum plate with the thickness of 0.06mm, compounding the obtained PET thermal composite film with the aluminum plate, and feeding the composite film into a hot press for hot pressing and forming, wherein the curing temperature of a press plate of the hot press is 115 ℃, the heat preservation time is 13min, and the pressure is 5 MPa.
Wherein the thickness of the modified PET film is 0.04 mm.
Example 4
A preparation method of a PET-based heat reflection film comprises the following steps:
(1) passing through SiO with the particle diameter of 18nm2Modifying PET with the particles to obtain modified PET;
(2) the modified PET raw material is subjected to pre-crystallization and drying treatment, then enters an extruder for melting and plasticizing, and then passes through a pre-filter, a metering pump and a main filter to be subjected to die head; the cast sheet is pressed on a quenching wheel by an electrostatic adsorption device, is rapidly cooled to form a cast sheet, and then is sequentially stretched longitudinally and transversely (the longitudinal stretching ratio is 3.6, and the transverse stretching ratio is 4.0). The base film is subjected to shaping, cooling, thickness measurement, edge cutting, static elimination treatment and online winding to obtain a PET thermal composite film;
(3) cleaning, passivating and drying an aluminum plate with the thickness of 0.06mm, compounding the obtained PET thermal composite film with the aluminum plate, and feeding the composite film into a hot press for hot pressing and forming, wherein the curing temperature of a press plate of the hot press is 130 ℃, the heat preservation time is 15min, and the pressure is 7 MPa.
Wherein the thickness of the modified PET film is 0.05 mm.
The implementation effect is as follows:
comparative example: coating an adhesive on an electrochemical treatment aluminum plate, then covering a PET film on an adhesive base layer, and feeding the adhesive base layer into a hot press for hot press forming, wherein the hot press forming parameters are the same as those of the embodiment 1-4; the PET coated aluminum sheets obtained in examples 1-4 and comparative example were subjected to performance tests, and the results are shown in Table 1;
TABLE 1
As can be seen from the data in Table 1, the nano SiO2The adhesive force of the PET-based heat reflection film obtained in the examples 1-4 before aging is equivalent to that of the comparative example, but after aging for 168 hours in hot air, the adhesive force of the examples 1-4 is obviously higher than that of the comparative example, which shows that the PET is subjected to nano SiO2The modification of the particles can be obviously improvedThe surface heat resistance of the PET film is high, the cost is obviously reduced, and the use is more convenient.
The above description is only for the purpose of illustrating the preferred embodiments of the present invention and is not to be construed as limiting the invention, and any modifications, equivalents, improvements and the like that fall within the spirit and principle of the present invention are intended to be included therein.
Claims (5)
1. A preparation method of a PET-based heat reflection film is characterized by comprising the following steps:
(1) by means of nano SiO2Modifying PET with the particles to obtain modified PET;
(2) the modified PET raw material is subjected to pre-crystallization and drying treatment, then enters an extruder for melting and plasticizing, and then passes through a pre-filter, a metering pump and a main filter to be subjected to die head; pressing the base film on a quenching wheel by an electrostatic adsorption device, rapidly cooling to form a cast sheet, then sequentially stretching longitudinally and transversely, and carrying out shaping, cooling, thickness measurement, edge cutting, electrostatic elimination treatment and online winding on the base film to obtain a PET thermal composite film;
(3) covering the PET heat-recombination film on an aluminum plate, and feeding the aluminum plate into a hot press for hot press molding to obtain the PET-based heat-reflection film.
2. The method for preparing a PET-based heat reflective film according to claim 2, wherein in the step (1), the nano SiO is2The particle size of the particles is 2-25 nm.
3. The method for preparing a PET-based heat reflective film according to claim 2, wherein in the step (2), the longitudinal stretching ratio and the transverse stretching ratio are 3.0-3.6 and 3.4-4.0, respectively.
4. The method for preparing a PET-based heat reflective film according to claim 2, wherein in the step (2), the thickness of the PET modified film is 0.02-0.05 mm.
5. The method for preparing a PET-based heat reflective film according to claim 2, wherein in the step (3), the aluminum plate has a thickness of 0.06 mm.
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| CN202010868125.1A CN112009052A (en) | 2020-08-26 | 2020-08-26 | Preparation method of PET-based heat reflection film |
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| CN202010868125.1A CN112009052A (en) | 2020-08-26 | 2020-08-26 | Preparation method of PET-based heat reflection film |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112048252A (en) * | 2020-08-26 | 2020-12-08 | 江苏鼎胜新能源材料股份有限公司 | Cold roofing that PET modified film prepared |
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| CN102070882A (en) * | 2009-11-24 | 2011-05-25 | 北京奥瑞金新美制罐有限公司 | Polyester film for being adhered to surface of metal thin plate and manufacture method thereof |
| KR20130061458A (en) * | 2011-12-01 | 2013-06-11 | 한국생산기술연구원 | Heat resistance nanocomposite transparent film |
| CN103483782A (en) * | 2013-09-03 | 2014-01-01 | 陈曦 | Multipurpose polyester film and preparation method thereof |
| CN105038683A (en) * | 2015-07-30 | 2015-11-11 | 南通惠然生物科技有限公司 | Preparation method for nano-modified polyurethane adhesive |
| KR20170080487A (en) * | 2015-12-31 | 2017-07-10 | 서울대학교산학협력단 | Adhesive-less multi-layered flexible film having moisture and gas barrier properties and their preparation method |
| CN110920169A (en) * | 2018-09-19 | 2020-03-27 | 宝山钢铁股份有限公司 | Preparation method of single-layer copolyester iron-clad film and film-clad metal plate thereof |
-
2020
- 2020-08-26 CN CN202010868125.1A patent/CN112009052A/en active Pending
Patent Citations (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101052679A (en) * | 2004-09-10 | 2007-10-10 | 汉斯化学股份公司 | Poly resin composition |
| CN102070882A (en) * | 2009-11-24 | 2011-05-25 | 北京奥瑞金新美制罐有限公司 | Polyester film for being adhered to surface of metal thin plate and manufacture method thereof |
| KR20130061458A (en) * | 2011-12-01 | 2013-06-11 | 한국생산기술연구원 | Heat resistance nanocomposite transparent film |
| CN103483782A (en) * | 2013-09-03 | 2014-01-01 | 陈曦 | Multipurpose polyester film and preparation method thereof |
| CN105038683A (en) * | 2015-07-30 | 2015-11-11 | 南通惠然生物科技有限公司 | Preparation method for nano-modified polyurethane adhesive |
| KR20170080487A (en) * | 2015-12-31 | 2017-07-10 | 서울대학교산학협력단 | Adhesive-less multi-layered flexible film having moisture and gas barrier properties and their preparation method |
| CN110920169A (en) * | 2018-09-19 | 2020-03-27 | 宝山钢铁股份有限公司 | Preparation method of single-layer copolyester iron-clad film and film-clad metal plate thereof |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112048252A (en) * | 2020-08-26 | 2020-12-08 | 江苏鼎胜新能源材料股份有限公司 | Cold roofing that PET modified film prepared |
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