阅读说明：本技术 一种光转换双向拉伸聚酯薄膜 (Light conversion biaxially oriented polyester film ) 是由 范和强 陈正坚 吴锡清 赵言松 方王凯 杨凯元 于 2020-04-06 设计创作，主要内容包括：本发明提供了一种光转换双向拉伸聚酯薄膜,该光转换双向拉伸聚酯薄膜由上至下依次为：抗静电层、第一功能层、光转换层、第二功能层和；抗静电层的设置使得薄膜具有优异的抗静电能力,不仅使薄膜功能趋于多元化,也增强了薄膜应用范围,另外,光转换层的设置可以将紫外光转换为可见光,增强了光能利用率。而且薄膜表面光洁平整,透明性好。此外该转换膜最大可将太阳能电池的能量转换效率提高10％左右。(The invention provides a light conversion biaxially oriented polyester film, which sequentially comprises the following components from top to bottom: the light conversion layer is arranged on the first functional layer; the film has excellent antistatic ability due to the arrangement of the antistatic layer, the functions of the film tend to be diversified, the application range of the film is also enhanced, in addition, the ultraviolet light can be converted into visible light due to the arrangement of the light conversion layer, and the light energy utilization rate is enhanced. And the surface of the film is smooth and flat, and the transparency is good. In addition, the conversion film can improve the energy conversion efficiency of the solar cell by about 10% at most.)

1. A light conversion biaxially oriented polyester film is characterized in that: the light conversion biaxially oriented polyester film sequentially comprises from top to bottom: the light-emitting diode comprises an antistatic layer (1), a first functional layer (2), a light conversion layer (3) and a second functional layer (4);

wherein the first functional layer (2) and the second functional layer (4) are both composed of: 60 to 70 percent of optical grade polyester particles, 0 to 10 percent of antishrinking agent, and 20 to 30 percent of polyester slices;

the light conversion layer (3) comprises the following components: 60 to 80 percent of optical grade PET raw material particles, 20 to 35 percent of PET light conversion particles and 0 to 3 percent of color master particles.

2. The light-converting biaxially oriented polyester film according to claim 1, wherein: the antistatic layer (1) comprises RU-92-208 resin, AC-177 resin, curing agent XR-5508 and antistatic agent 1-1M-102.

3. The light-converting biaxially oriented polyester film according to claim 1, wherein: the first functional layer (2) and the second functional layer (4) have a total thickness of 5 to 10 [ mu ] m.

4. The light-converting biaxially oriented polyester film according to claim 3, wherein: the thickness of the first functional layer (2) is greater than the thickness of the second functional layer (4).

5. The light-converting biaxially oriented polyester film according to claim 1, wherein: the thickness of the light conversion layer (3) is 10 to 20 [ mu ] m.

6. The light-converting biaxially oriented polyester film according to claim 1, wherein: the thickness of the antistatic layer (1) is 1 μm to 5 μm.

7. The light conversion biaxially oriented polyester film according to claim 1, wherein the light conversion layer (3) comprises a light conversion agent, and the preparation method of the light conversion agent comprises the steps of dropwise adding 8ml of concentrated hydrochloric acid into 3.52g of europium trioxide, heating to dissolve the europium trioxide and then evaporating to dryness to separate out white crystals, dissolving the white crystals with absolute ethyl alcohol to prepare a solution, dissolving 13.44g of dibenzoylmethane and 3.96g of phenanthroline with absolute ethyl alcohol, mixing europium trichloride, dibenzoylmethane phenanthroline and an ethanol solution according to a molar ratio of 1: 3:1, stirring for 1 hour at room temperature, adjusting the pH to 6-7 with 0.1 mol/L of sodium ethoxide solution, carrying out suction filtration, washing, and drying to obtain the light conversion agent S.

8. The light-converting biaxially oriented polyester film according to claim 7, wherein: the method is characterized in that: the light conversion layer (3) further comprises a PET light conversion agent, and the preparation of the PET light conversion agent comprises the following steps: mixing the mixture of the optical PET polyester particles, the ultraviolet light stabilizer, the antioxidant and the light conversion agent S additive at the rotating speed of 500r/min to 600r/min for 15min to 20min, then adjusting the rotating speed to 2500r/min to 3000r/min for 15min to 20min, and then mixing at the rotating speed of 300r/min to 400r/min for 15min to 20 min;

putting the mixed materials into a double-screw extruder for melt extrusion;

granulating the melt after melt extrusion through drawing and water cooling;

and (3) blending and sieving the materials after extrusion granulation, and removing lumps after the granulation process to obtain the PET light conversion agent.

9. The light-converting biaxially oriented polyester film according to claim 1, wherein: the resistance value of the antistatic layer (1) is 10⁵To 10⁶Ω。

Technical Field

The invention relates to the field of films, in particular to a light conversion biaxially oriented polyester film.

Background

A film is a material commonly used in the art, and particularly, a film having optical characteristics is more widely used, for example, a film having a light conversion capability, etc.

Disclosure of Invention

The invention provides a light conversion biaxially oriented polyester film, which solves the technical problems of poor light conversion capability and single function of the film in the prior art.

To achieve the above object, some embodiments of the present invention provide a light conversion biaxially oriented polyester film, which comprises, in order from top to bottom: the light conversion layer comprises an antistatic layer, a first functional layer, a light conversion layer and a second functional layer;

wherein the first functional layer and the second functional layer both comprise the following components: 60 to 70 percent of optical grade polyester particles, 0 to 10 percent of antishrinking agent, and 20 to 30 percent of polyester slices;

the composition of the light conversion layer is: 60 to 80 percent of optical grade PET raw material particles, 20 to 35 percent of PET light conversion particles and 0 to 3 percent of color master particles.

In this scheme, the setting of antistatic layer makes the film have antistatic effect, has increased the function of film, and in addition, the setting of photoconversion layer can be with ultraviolet ray conversion for visible light, has strengthened ability utilization ratio, and the film surface is bright and clean level and smooth moreover, and the transparency is good.

Preferably, the antistatic layer comprises RU-92-208 resin, AC-177 resin, curing agent XR-5508 and antistatic agent 1-1M-102. The antistatic coating comprises RU-92-208 resin, AC-177 resin, a curing agent XR-5508 and an antistatic agent 1-1M-102, wherein the weight ratio of the RU-92-208 resin, the AC-177 resin, the curing agent XR-5508 and the antistatic agent 1-1M-102 is as follows: 40 to 45: 25 to 30:5 to 10:5 to 15. The coating speed is 90 m/min-120 m/min, and the coating weight per unit area is 0.5g/m 2-1.5 g/m 2.

The antistatic layer has good antistatic performance, and the performance of the film is optimized.

Preferably, the total thickness of the first functional layer and the second functional layer is 5 μm to 10 μm.

The film has reasonable thickness, so that the film has good mechanical property.

Preferably, the thickness of the first functional layer is greater than the thickness of the second functional layer.

The first functional layer is not easy to be damaged, and the service life of the film is prolonged.

Preferably, the thickness of the light conversion layer is 10 μm to 20 μm.

The light conversion layer has good light conversion capability, and the performance of the film is optimized.

Preferably, the antistatic layer has a thickness of 1 μm to 5 μm.

The antistatic layer has good antistatic performance.

Preferably, the light conversion layer comprises a light conversion agent, and the preparation method of the light conversion agent comprises the following steps of taking 3.52g of europium trioxide, dropwise adding 8ml of concentrated hydrochloric acid, heating to dissolve, evaporating to dryness to separate out white crystals, dissolving the white crystals with absolute ethyl alcohol to prepare a solution, taking 13.44g of dibenzoylmethane and 3.96g of phenanthroline to dissolve with absolute ethyl alcohol, mixing europium trichloride, dibenzoylmethane phenanthroline and an ethanol solution according to a molar ratio of 1: 3:1, stirring for 1 hour at room temperature, adjusting the pH to 6-7 with 0.1 mol/L of sodium ethoxide solution, generating a light yellow precipitate, carrying out suction filtration, washing, and drying to obtain the light conversion agent S.

The light conversion agent has a low manufacturing cost.

Preferably, the light conversion layer further comprises a PET light conversion agent, and the preparation of the PET light conversion agent comprises the following steps: mixing the mixture of the optical PET polyester particles, the ultraviolet light stabilizer, the antioxidant and the light conversion agent S additive at the rotating speed of 500r/min to 600r/min for 15min to 20min, then adjusting the rotating speed to 2500r/min to 3000r/min for 15min to 20min, and then mixing at the rotating speed of 300r/min to 400r/min for 15min to 20 min;

putting the mixed materials into a double-screw extruder for melt extrusion;

granulating the melt after melt extrusion through drawing and water cooling;

and (3) blending and sieving the materials after extrusion granulation, and removing lumps after the granulation process to obtain the PET light conversion agent.

The manufacturing cost of the film is reduced.

Preferably, the antistatic layer has a resistance value of 10⁵To 10⁶Ω。

The antistatic performance of the antistatic layer is optimized.

Compared with the prior art, the technical scheme of the invention has the following beneficial effects:

1. the antistatic layer enables the film to have antistatic capacity, and functions of the film are increased.

2. The arrangement of the light conversion layer enables the film to convert visible light, and the utilization rate of energy is enhanced.

3. The arrangement of the first functional layer enables the surface of the film to be smooth and flat and has good transparency.

Drawings

The following drawings are only exemplary and are not all drawings of the technical solution of the present invention, and those skilled in the art can obtain other drawings according to the technical solution of the present invention.

FIG. 1 is a schematic diagram of one embodiment of the present invention.

Detailed Description

The present invention will be further described with reference to the accompanying drawings, and the following embodiments are only exemplary and are not all embodiments of the technical solution of the present invention.

As shown in fig. 1, a light conversion biaxially oriented polyester film, which sequentially comprises from top to bottom: an antistatic layer 1, a first functional layer 2, a light conversion layer 3 and a second functional layer 4;

wherein, the first functional layer 2 and the second functional layer 4 have the following components: 60 to 70 percent of optical grade polyester particles, 0 to 10 percent of antishrinking agent, and 20 to 30 percent of polyester slices;

the composition of the light conversion layer 3 is: 60 to 80 percent of optical grade PET raw material particles, 20 to 35 percent of PET light conversion particles and 0 to 3 percent of color master particles.

The antistatic layer 1 comprises RU-92-208 resin, AC-177 resin, curing agent XR-5508 and antistatic agent 1-1M-102. The four material ratios in the antistatic layer 1 can be freely configured, and are not limited herein, and can be freely selected by those skilled in the art. Specifically, any of the above four materials may be provided to achieve antistatic ability.

The composition of the light conversion layer 3 described above is: 70% of optical grade PET raw material particles, 28% of PET light conversion particles and 2% of color master batch.

The composition of the light conversion layer 3 described above is: 70% of optical grade PET raw material particles, 30% of PET light conversion particles.

The composition of the light conversion layer 3 described above is: 72% of optical grade PET raw material particles, 27% of PET light conversion particles and 1% of color master particles.

The composition of the light conversion layer 3 described above is: 66% of optical grade PET raw material particles, 34% of PET light conversion particles and 1% of color master particles.

The composition of the light conversion layer 3 described above is: 80% of optical grade PET raw material particles, 20% of PET light conversion particles.

The first functional layer 2 and the second functional layer 4 have the following components: 70% of optical grade polyester particles and 30% of polyester chips.

The first functional layer 2 and the second functional layer 4 have the following components: 60% of optical grade polyester particles, 10% of anti-shrinking agent and 30% of polyester chips.

The first functional layer 2 and the second functional layer 4 have the following components: 65 optical grade polyester particles, 5% antishrinking agent, 30% polyester chip.

The total thickness of the first functional layer 2 and the second functional layer 4 is 5 μm.

The total thickness of the first functional layer 2 and the second functional layer 4 is 6 μm.

The total thickness of the first functional layer 2 and the second functional layer 4 is 7 μm.

The total thickness of the first functional layer 2 and the second functional layer 4 is 8 μm.

The total thickness of the first functional layer 2 and the second functional layer 4 is 9 μm.

The total thickness of the first functional layer 2 and the second functional layer 4 is 10 μm.

The thickness of the first functional layer 2 is greater than the thickness of the second functional layer 4.

The thickness of the light conversion layer 3 was 10 μm.

The thickness of the light conversion layer 3 was 11 μm.

The thickness of the light conversion layer 3 was 12 μm.

The thickness of the light conversion layer 3 was 13 μm.

The thickness of the light conversion layer 3 was 14 μm.

The thickness of the light conversion layer 3 was 15 μm.

The thickness of the light conversion layer 3 was 16 μm.

The thickness of the light conversion layer 3 was 17 μm.

The thickness of the antistatic layer 1 was 18 μm.

The thickness of the light conversion layer 3 was 19 μm.

The thickness of the light conversion layer 3 was 20 μm.

The specific thickness of each layer can be freely selected in the interval, and particularly, the thickness of each layer can be selected in the interval, so that the overall thickness of the film can be effectively controlled, and the overall mechanical property of the film can be effectively improved.

The preparation of part of the material in the light conversion layer 3 is described below, the light conversion layer 3 comprises a light conversion agent, and the preparation method of the light conversion agent comprises the following steps of taking 3.52g of europium sesquioxide, dropwise adding 8ml of concentrated hydrochloric acid, heating to dissolve, evaporating to dryness to separate out white crystals, dissolving the white crystals with absolute ethyl alcohol to prepare a solution, taking 13.44g of dibenzoylmethane and 3.96g of phenanthroline to dissolve with absolute ethyl alcohol, mixing europium trichloride, dibenzoylmethane phenanthroline and an ethanol solution according to a molar ratio of 1: 3:1, stirring for 1 hour at room temperature, adjusting the pH to 6-7 with 0.1 mol/L of sodium ethoxide solution, generating a light yellow precipitate, carrying out suction filtration, washing and drying to obtain the light conversion agent S.

The light conversion layer 3 further comprises a PET light conversion agent, and the preparation of the PET light conversion agent comprises the following steps: mixing the mixture of the optical PET polyester particles, the ultraviolet light stabilizer, the antioxidant and the light conversion agent S additive at the rotating speed of 500r/min to 600r/min for 15min to 20min, then adjusting the rotating speed to 2500r/min to 3000r/min for 15min to 20min, and then mixing at the rotating speed of 300r/min to 400r/min for 15min to 20 min;

putting the mixed materials into a double-screw extruder for melt extrusion; extrusion melt zone temperatures: zone 1: 230 ℃, 2 zone 277 ℃, 3 zone 291 ℃,4 zone 294 ℃, 5 zone 289 ℃, 6 zone 285 ℃,7 zone 284 ℃, 8 zone 285 ℃.

Specifically, the light conversion layer further comprises a PET light conversion agent, and the specific ratio is as follows: respectively mixing PET polyester particles, an ultraviolet light stabilizer, an antioxidant and a light conversion agent S in percentage by mass: PET polyester particles: ultraviolet light stabilizer: antioxidant: the light conversion agent S is (93-95)%: (0.5-1.5)%: (0.1-0.5)%: (1-3)% of the mixture is added into a blender, and finally the mixed raw materials are put into a double-screw extruder to be extruded to prepare PET light conversion particles, wherein the temperature of each section of the extrusion melting is as follows: zone 1: 230 ℃, 2 zone 277 ℃, 3 zone 291 ℃,4 zone 294 ℃, 5 zone 289 ℃, 6 zone 285 ℃,7 zone 284 ℃, 8 zone 285 ℃. ) The preparation method of the PET light conversion agent comprises the following steps: the mixture of the optical PET polyester particles, the ultraviolet light stabilizer, the antioxidant and the light conversion agent S additive is firstly mixed for 15min to 20min at the rotating speed of 500r/min to 600r/min, then the rotating speed is adjusted to 2500r/min to 3000r/min, the mixture is mixed for 15min to 20min, and then the mixture is mixed for 15min to 20min at the rotating speed of 300r/min to 400 r/min.

And granulating the melt extruded by melting through drawing and water cooling. And (3) blending and sieving the materials after extrusion granulation with a mesh of 100, and removing lumps after the granulation process to obtain the PET light conversion agent.

The resistance value of the antistatic layer 1 is 10⁵To 10⁶Ω。

After the material of the light conversion layer 3 is prepared, the light conversion layer 3 is prepared by using a conventional material. For example, the material of the light conversion layer 3 and the materials of the first functional layer 2 and the second functional layer 4 can be prepared by a three-layer coextrusion scheme. Then, the antistatic layer 1 is formed by an in-line coating process.

The preparation process of the optical PET polyester particles can be as follows: respectively mixing PET polyester particles, an ultraviolet light stabilizer, an antioxidant and a light conversion agent S in percentage by mass: PET polyester particles: ultraviolet light stabilizer: antioxidant: the light conversion agent S is (93-95)%: (0.5-1.5)%: (0.1-0.5)%: (1-3)% of the mixture is added into a blender, and finally the mixed raw materials are put into a double-screw extruder to be extruded to prepare PET light conversion particles, wherein the temperature of each section of the extrusion melting is as follows: zone 1: 230 ℃, 2 zone 277 ℃, 3 zone 291 ℃,4 zone 294 ℃, 5 zone 289 ℃, 6 zone 285 ℃,7 zone 284 ℃, 8 zone 285 ℃.

While several possible embodiments of the invention have been described above with reference to the accompanying drawings, it is to be understood that these embodiments are not all embodiments of the invention, and that those skilled in the art may devise other embodiments without any inventive step and without any loss of scope.

The technical effects of the solution according to the invention will become apparent from the following comparative experimental data.

Light conversion layer formula (under the condition that the functional layer formula is not changed):

and (3) testing items:

1. and (3) testing light transmittance: the testing instrument is an ultraviolet-visible spectrophotometer and is used for testing the light transmittance of the material in a 500-800 nm light region;

2. AND testing the light conversion rate, namely, an energy conversion rate calculation formula, wherein the energy conversion rate is the maximum output power/incident power, AND the input power AND the incident power are tested by adopting an instrument L AND CT2001A electrochemical workstation.

The test results were as follows:

	group large input power/[ mu ] W	Incident power/. mu.W	Energy conversion rate/%)	Transmittance (a)
					1 (comparative example)	1.64	10	16.4	88～89
2 (examples)	1.65	10	16.5	83～85
					3 (examples)	1.70	10	17.0	78～80
4 (examples)	1.79	10	17.9	70～72

And (4) conclusion: when the addition amount of the PET light conversion particles is increased to 35%, the energy conversion rate is increased from 16.4% to 17.9%, and is increased by more than 9.8%. At the moment, the light transmittance of the conversion film in a 500-800 nm light area is 70-72%, and the conversion film still keeps good light transmittance.

Functional layer formula (light conversion layer formula is unchanged)

And (3) data testing:

(1) testing the heat shrinkage performance: the tests were carried out in an incubator according to the national standard GB/T13542.2.

(2) Surface energy testing: the film surface tension was measured according to the national standard GB/T14216.

	Transverse Heat shrinkage (%)	Surface tension
			1 (comparative example)	0.18	56
2 (examples)	0.11	56
			3 (examples)	0.08	56
4 (examples)	0.07	56
			5 (examples)	0.06	56
6 (examples)	0.06	56