CN214111841U

CN214111841U - High-heat-shrinkage polyester film capable of avoiding secondary shrinkage

Info

Publication number: CN214111841U
Application number: CN202023178986.1U
Authority: CN
Inventors: 曹余庆; 袁辉斌
Original assignee: Wuxi Tuobang High Tech Materials Co ltd
Current assignee: Wuxi Tuobang High Tech Materials Co ltd
Priority date: 2020-12-25
Filing date: 2020-12-25
Publication date: 2021-09-03
Anticipated expiration: 2030-12-25

Abstract

The utility model discloses a high thermal contraction polyester film capable of avoiding secondary contraction, which comprises a film body, wherein the film body comprises a main base layer, two secondary auxiliary layers are arranged on two sides of the main base layer, the two secondary auxiliary layers are respectively a first secondary auxiliary layer and a second secondary auxiliary layer, the outer walls of two sides of the main base layer are respectively coated with an adhesive layer, the main base layer is bonded with a first anti-tearing layer and a second anti-tearing layer through the adhesive layers on two sides, the first secondary auxiliary layer is bonded on the outer side of the first anti-tearing layer, and the second secondary auxiliary layer is bonded on the outer side of the second anti-tearing layer; the utility model discloses a having increased the constitution level of film basic unit, also having increased the thickness of basic unit's material, having increased thermal-insulated level again, when being heated, share most heat by two secondary basic units in the outside, make the stability on its main basic unit better to the thermal stability who has avoided the film is relatively poor, thereby can produce the condition of secondary shrink.

Description

High-heat-shrinkage polyester film capable of avoiding secondary shrinkage

Technical Field

The utility model particularly relates to a polyester film technical field especially relates to a can avoid high heat shrinkage polyester film of secondary shrink.

Background

The polyester film is a high molecular plastic film, which is a film material prepared by using polyethylene terephthalate as a raw material, preparing a thick sheet by an extrusion method and performing biaxial tension. Because of its excellent comprehensive performance, it is more and more popular among consumers. Can be widely used in the glass fiber reinforced plastic industry, building material industry, printing industry and medical and health care industry.

However, as the applications expand, mylar still faces some issues that need to be optimized: in certain cases, polyester films have poor thermal stability and may undergo secondary shrinkage, and thus, further development of polyester films is required.

SUMMERY OF THE UTILITY MODEL

The utility model aims at solving the defects existing in the prior art and providing a high-heat-shrinkage polyester film which can avoid secondary shrinkage.

In order to achieve the above purpose, the utility model adopts the following technical scheme:

the utility model provides a can avoid high thermal contraction polyester film of secondary shrink, includes the film body, and the film body is including main basic unit, the both sides of main basic unit still are equipped with two secondary auxiliary layers, and two secondary auxiliary layers are first secondary auxiliary layer and second secondary auxiliary layer respectively, the both sides outer wall of main basic unit scribbles respectively and glues the layer, and main basic unit bonds through the glutinous layer of both sides has first anti-tear layer and second anti-tear layer, and first secondary auxiliary layer bonds in the first anti-tear layer outside, and second secondary auxiliary layer bonds in the second anti-tear layer outside, and first secondary auxiliary layer and second secondary auxiliary layer bond respectively through gluing the layer and have first inoxidizing coating and second inoxidizing coating, and the first inoxidizing coating outside is equipped with first tombarthite nanometer thermal barrier coating, and the second inoxidizing coating outside is equipped with second tombarthite nanometer thermal barrier coating.

Further, the sum of the thicknesses of the first secondary auxiliary layer and the second secondary auxiliary layer is 1.3-1.7 times of the thickness of the main base layer.

Further, the materials of the first anti-tear layer and the second anti-tear layer are polyurethane resin.

Furthermore, the first protective layer and the second protective layer are both solar films.

Further, the first rare earth nanometer thermal insulation coating and the second rare earth nanometer thermal insulation coating are formed by coating a rare earth nanometer thermal insulation coating liquid on the first protective layer and the second protective layer and then drying and curing the coating.

The utility model has the advantages that:

1. through the mode that sets up two secondary auxiliary layers in the both sides of owner's base course, increased the composition of film basic unit, also increased the thickness of basic unit's material for the difficult fracture that takes place of film, and when being heated, share most heat by two secondary basic units in the outside, make its stability on owner's base course better, thereby avoided the thermal stability of film relatively poor, thereby can produce the condition of secondary shrink.

2. Through the arrangement of the first protective layer and the second protective layer, the solar film is a multi-layer to dense high-heat-insulation metal film layer which is usually made of metals such as aluminum, gold, copper, silver and the like through a vacuum spraying or magnetron sputtering technology and has the functions of heat insulation, energy conservation, ultraviolet resistance and the like, so that the heat insulation capability of the film is further enhanced.

3. Through the arrangement of the first rare earth nanometer heat insulation coating and the second rare earth nanometer heat insulation coating, a layer of heat insulation protection is additionally arranged on the outer side of the solar film, the heat insulation capability of the film is improved once through the multi-level heat insulation arrangement, the problem that the thermal stability of the film is poor and secondary shrinkage can be caused is avoided.

Drawings

FIG. 1 is a schematic perspective view of a high thermal shrinkage polyester film capable of avoiding secondary shrinkage according to the present invention;

fig. 2 is a schematic view of a cross-sectional structure of a high thermal shrinkage polyester film capable of avoiding secondary shrinkage according to the present invention.

In the figure: 1. a primary base layer; 2. a first tear resistant layer; 3. a first secondary auxiliary layer; 4. a first protective layer; 5. a first rare earth nano thermal barrier coating; 6. a second tear resistant layer; 7. a second secondary auxiliary layer; 8. a second protective layer; 9. and a second rare earth nano heat insulation coating.

Detailed Description

The technical solutions in the embodiments of the present invention will be described clearly and completely with reference to the accompanying drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only some embodiments of the present invention, not all embodiments. It should be noted that unless otherwise explicitly stated or limited, the terms "mounted," "connected," and "disposed" are to be construed broadly and their meaning in the context of this patent may be understood by those skilled in the art as appropriate.

Referring to fig. 1-2, a high thermal shrinkage polyester film capable of avoiding secondary shrinkage, comprising a film body, wherein the film body comprises a main base layer 1, two secondary auxiliary layers are arranged on two sides of the main base layer 1, the two secondary auxiliary layers increase the composition of the film and also increase the thickness of the base layer material, so that the film is not easy to break, and when being heated, most of heat is shared by the two secondary base layers on the outer side, so that the stability of the main base layer 1 is better, the two secondary auxiliary layers are respectively a first secondary auxiliary layer 3 and a second secondary auxiliary layer 7, the sum of the thicknesses of the first secondary auxiliary layer 3 and the second secondary auxiliary layer 7 is 1.3-1.7 times of the thickness of the main base layer 1, so that the thickness of the film is improved, the outer walls on two sides of the main base layer 1 are respectively coated with a sticky layer, the sticky layer is a polyurethane adhesive, the main base layer 1 is provided with a first anti-tear layer 2 and a second anti-tear layer 6 through the sticky layers on two sides, the first anti-tear layer 2 and the second anti-tear layer 6 are made of polyurethane resin, the first secondary auxiliary layer 3 is adhered to the outer side of the first anti-tear layer 2, the second secondary auxiliary layer 7 is adhered to the outer side of the second anti-tear layer 6, the first protective layer 4 and the second protective layer 8 are respectively adhered to the first secondary auxiliary layer 3 and the second secondary auxiliary layer 7 through adhesion layers, the first protective layer 4 and the second protective layer 8 are solar films, the solar films are multi-layer to dense high-heat-insulation metal film layers made of metals such as aluminum, gold, copper and silver through vacuum spraying or magnetron sputtering technology, the solar films have the functions of heat insulation, energy conservation, ultraviolet resistance and the like, the heat insulation capability of the films on heat is further enhanced, the first rare earth nano heat insulation coating 5 is arranged on the outer side of the first protective layer 4, the second rare earth nano heat insulation coating 9 is arranged on the outer side of the second protective layer 8, and the first rare earth nano heat insulation coating 5 and the second rare earth nano heat insulation coating 9 are both made of rare earth nano heat insulation coating liquid using rare earth nano heat insulation coating liquid The solar film is formed by coating the first protective layer 4 and the second protective layer 8 and then drying and curing the solar film, so that a layer of heat insulation protection is added on the outer side of the solar film, and the heat insulation capability of the film is improved once due to the multi-level heat insulation arrangement, so that the situation that the film is poor in heat stability and can shrink for the second time is avoided.

It should be noted that the production mode and the raw materials of the main base layer 1, the first secondary auxiliary layer 3 and the second secondary auxiliary layer 7 are the same, and the difference is only the thickness structure, and the raw materials include, by weight: 60-70 parts of polyethylene terephthalate, 9-11 parts of phthalate, 15-20 parts of 1, 4-cyclohexanedimethanol modified polyester, 10-15 parts of hydroxyapatite, 5-10 parts of nano aluminum oxide, 10-30 parts of anti-blocking agent, 5-8 parts of antistatic agent and 10-20 parts of other additives, and the materials are subjected to melt extrusion, granulation and drying processes to prepare copolyester chips; the copolyester slices are subjected to melt extrusion, die head sheet casting, transverse far infrared heating of raw materials, stretching, cooling and shaping, rolling and slitting by equipment to prepare a heat-shrinkable copolyester film with transverse heat shrinkage rate of more than 75% and single-layer thickness of more than 50 mu m; wherein the stretching temperature of the heat-shrinkable copolyester film is 100-120 ℃, the preheating temperature is 70-90 ℃, and the transverse stretching magnification is 3.9-4.1; in the esterification and polycondensation reaction processes of the copolyester, the esterification temperature is 210-275 ℃, the absolute esterification pressure is 0.1-0.4 MPa, and the esterification time is 1-5 h; the polycondensation temperature is 250-295 ℃, the absolute pressure of polycondensation is less than or equal to 100Pa, and the polycondensation time is 1-4 h.

The working principle of the embodiment is as follows: during the use, the first tombarthite nanometer thermal barrier coating 5 and the second tombarthite nanometer thermal barrier coating 9 of film outside are thermal-insulated first, then are thermal-insulated by first inoxidizing coating 4 and the second inoxidizing coating 8 for the sun membrane, then share most heat by two secondary basic units in the outside, just at last bear the heat by main basic unit 1, make the stability of its main basic unit better to the thermal stability of having avoided the film is relatively poor, thereby can produce the condition of secondary shrink.

The above, only be the concrete implementation of the preferred embodiment of the present invention, but the protection scope of the present invention is not limited thereto, and any person skilled in the art is in the technical scope of the present invention, according to the technical solution of the present invention and the utility model, the concept of which is equivalent to replace or change, should be covered within the protection scope of the present invention.

Claims

1. The high-heat-shrinkage polyester film capable of avoiding secondary shrinkage comprises a film body, wherein the film body comprises a main base layer (1) and is characterized in that two secondary auxiliary layers are further arranged on two sides of the main base layer (1), the two secondary auxiliary layers are respectively a first secondary auxiliary layer (3) and a second secondary auxiliary layer (7), the outer walls of two sides of the main base layer (1) are respectively coated with an adhesive layer, the main base layer (1) is bonded with a first anti-tearing layer (2) and a second anti-tearing layer (6) through the adhesive layers on the two sides, the first secondary auxiliary layer (3) is bonded on the outer side of the first anti-tearing layer (2), the second secondary auxiliary layer (7) is bonded on the outer side of the second anti-tearing layer (6), the first secondary auxiliary layer (3) and the second secondary auxiliary layer (7) are respectively bonded with a first protective layer (4) and a second protective layer (8) through the adhesive layers, a first rare earth nanometer heat-insulating coating (5) is arranged on the outer side of the first protective layer (4), and a second rare earth nanometer heat-insulating coating (9) is arranged on the outer side of the second protective layer (8).

2. A high heat-shrinkable polyester film avoiding secondary shrinkage as set forth in claim 1, wherein: the sum of the thicknesses of the first secondary auxiliary layer (3) and the second secondary auxiliary layer (7) is 1.3-1.7 times of the thickness of the main base layer (1).

3. A high heat-shrinkable polyester film avoiding secondary shrinkage as set forth in claim 1, wherein: the first anti-tear layer (2) and the second anti-tear layer (6) are made of polyurethane resin.

4. A high heat-shrinkable polyester film avoiding secondary shrinkage as set forth in claim 1, wherein: the first protective layer (4) and the second protective layer (8) are solar films.

5. A high heat-shrinkable polyester film avoiding secondary shrinkage as set forth in claim 4, wherein: the first rare earth nanometer heat insulation coating (5) and the second rare earth nanometer heat insulation coating (9) are formed by coating rare earth nanometer heat insulation coating liquid on the first protective layer (4) and the second protective layer (8) and then drying and curing.