CN114106528A - High-heat-resistance high-light-transmittance PET (polyethylene terephthalate) film - Google Patents
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Abstract
The invention belongs to the technical field of materials, and particularly relates to a high-heat-resistance high-light-transmittance PET film which comprises the following raw materials in parts by weight: 20-28 parts of polyethylene terephthalate, 8-10 parts of polyethylene naphthalate, 8-16 parts of polyethylene, 6-10 parts of polyurethane dispersoid, 2-6 parts of sodium tripolyphosphate, 2-4 parts of antioxidant, 2-4 parts of polyacrylate resin, 2-5 parts of heat stabilizer, 2-4 parts of curing agent, 2-4 parts of coupling agent, 3-5 parts of polypropylene, 2-5 parts of polyethylene glycol and 3-30 parts of inorganic nanoparticles. The PET film disclosed by the invention has the characteristics of high heat resistance and high light transmittance, and has a good market application prospect.
Description
Technical Field
The invention relates to the technical field of PET (polyethylene terephthalate) films, in particular to a high-heat-resistance high-light-transmittance PET film.
Background
PET is one of the most widely used synthetic polymers for human beings at present, and is synthesized as early as 40 years in the twentieth century, has excellent performance and is widely applied to the fields of textile, packaging, medical sanitation, automobiles, electronic and electric appliances, safety protection, environmental protection and the like. Along with the progress of society, the living standard of people is improved, and the requirements on the performance of PET are higher and more diversified. However, the existing PET film is influenced by temperature and transmittance, so that the PET film is not ideal for some fields. Such as the high temperature areas of electrical equipment, which may cause problems with irreversible deformation.
Disclosure of Invention
The invention aims to solve the technical problem of providing a high-heat-resistance high-light-transmittance PET film aiming at the defects in the prior art.
In order to solve the technical problems, the invention adopts the technical scheme that: the high-heat-resistance high-light-transmittance PET film comprises the following raw materials in parts by weight: 20-28 parts of polyethylene terephthalate, 8-10 parts of polyethylene naphthalate, 8-16 parts of polyethylene, 6-10 parts of polyurethane dispersoid, 2-6 parts of sodium tripolyphosphate, 2-4 parts of antioxidant, 2-4 parts of polyacrylate resin, 2-5 parts of heat stabilizer, 2-4 parts of curing agent, 2-4 parts of coupling agent, 3-5 parts of polypropylene, 2-5 parts of polyethylene glycol and 3-30 parts of inorganic nanoparticles.
Preferably, the feed comprises the following raw materials in parts by weight: 24 parts of polyethylene terephthalate, 9 parts of polyethylene naphthalate, 12 parts of polyethylene, 8 parts of polyurethane dispersoid, 4 parts of sodium tripolyphosphate, 3 parts of antioxidant, 3 parts of polyacrylate resin, 3 parts of heat stabilizer, 3 parts of curing agent, 3 parts of coupling agent, 4 parts of polypropylene, 3 parts of polyethylene glycol and 18 parts of inorganic nano particles.
Preferably, the antioxidant is one or more of antioxidant B225, antioxidant DLTP and antioxidant TPP.
Preferably, the heat stabilizer is triethyl phosphate (TEPA).
Preferably, the curing agent is one or more of diaminodiphenylmethane, m-phenylenediamine and diaminodiphenyl sulfone.
Preferably, the coupling agent is a mixture of silane coupling agent a151 and vinyl trimethoxy silane.
Preferably, the inorganic nano particles are a mixture of nano montmorillonite, nano silica, nano calcium carbonate and nano cobalt tetraoxide ferrate.
Preferably, the mass ratio of the nano montmorillonite to the nano silicon dioxide to the nano calcium carbonate to the nano cobalt tetraoxide ferrate is 2:1:1: 1.
Preferably, the particle sizes of the nano montmorillonite, the nano silicon dioxide, the nano calcium carbonate and the nano cobalt tetraoxide ferrate are all 20nm-60 nm.
The invention also provides a preparation method of the high-heat-resistance high-light-transmittance PET film, which comprises the following steps:
1) adding the raw materials into a granulator, mixing and granulating to prepare PET polyester granules, wherein the mixing temperature is controlled at 110-130 ℃;
2) the prepared PET polyester particles are subjected to production of PET films by a full-automatic vacuum rotary drum, an extruder and a biaxial stretching unit, and the film outlet temperature is controlled to be 90-100 ℃.
3) And cooling, winding, packaging and warehousing.
The invention has the beneficial effects that: the invention provides a high heat-resistant high-light-transmittance PET film, wherein the heat resistance of the PET film can be obviously improved by blending and adding polyethylene terephthalate and polyethylene naphthalate; the polyurethane dispersion can effectively improve the wear resistance and the tear resistance of the high-temperature-resistant PET polyester film, so that the PET polyester film is not easy to generate bubbles and shrinkage cavities and has good film-forming property. The PET film disclosed by the invention has high heat resistance, high light transmittance and high water resistance, and has a good market application prospect.
Detailed Description
The present invention is further described in detail below with reference to examples so that those skilled in the art can practice the invention with reference to the description.
It will be understood that terms such as "having," "including," and "comprising," as used herein, do not preclude the presence or addition of one or more other elements or groups thereof.
The invention provides a high-heat-resistance high-light-transmittance PET film which comprises the following raw materials in parts by weight: 20-28 parts of polyethylene terephthalate, 8-10 parts of polyethylene naphthalate, 8-16 parts of polyethylene, 6-10 parts of polyurethane dispersoid, 2-6 parts of sodium tripolyphosphate, 2-4 parts of antioxidant, 2-4 parts of polyacrylate resin, 2-5 parts of heat stabilizer, 2-4 parts of curing agent, 2-4 parts of coupling agent, 3-5 parts of polypropylene, 2-5 parts of polyethylene glycol and 3-30 parts of inorganic nanoparticles.
Wherein, the heat resistance of the PET film can be obviously improved by blending the polyethylene terephthalate and the polyethylene naphthalate; the polyurethane dispersion can effectively improve the wear resistance and the tear resistance of the high-temperature-resistant PET polyester film, so that the PET polyester film is not easy to generate bubbles and shrinkage cavities and has good film-forming property.
The polyacrylate resin can improve the light transmittance of the PET film, but the independent addition of the polyacrylate resin can easily cause viscosity increase and fluidity reduction, the viscosity can be adjusted by adding polyethylene and polyethylene glycol, the light transmittance of the PET film is improved by the polyacrylate resin, and meanwhile, the hydrolysis resistance of the copolyester can be improved by the polyethylene glycol, so that the hydrolysis resistance of the copolyester can be further improved.
Wherein, the heat stabilizer is triethyl phosphate, and the addition of the triethyl phosphate can improve the heat stability, reduce the haze of PET and improve the transparency.
Wherein the coupling agent is a mixture of silane coupling agent a151 and vinyl trimethoxy silane.
Wherein the curing agent is one or more of diaminodiphenylmethane, m-phenylenediamine and diaminodiphenyl sulfone.
Wherein the inorganic nano particles are a mixture of nano montmorillonite, nano silicon dioxide and nano cobalt tetraoxide ferrate. More preferably, the mass ratio of the mixture of the nano montmorillonite, the nano silicon dioxide and the nano cobalt tetraoxide ferrate is 2:1: 1. The particle sizes of the nano montmorillonite, the nano silicon dioxide and the nano cobalt tetraoxide ferrate are all 20nm-60 nm.
The nano montmorillonite can improve heat resistance, and the nano silicon dioxide can improve strength, toughness, waterproof performance and ageing resistance. The nano montmorillonite, the nano silicon dioxide and the nano cobalt tetraoxide are added in a compounding manner, so that the synergistic enhancement effect can be achieved, and the heat resistance and the stability of the material can be obviously improved.
The invention also provides a preparation method of the high-heat-resistance high-light-transmittance PET film, which comprises the following steps:
1) adding the raw materials into a granulator, mixing and granulating again to prepare PET polyester granules, wherein the mixing temperature is controlled at 110-130 ℃;
2) the prepared PET polyester particles are subjected to production of PET films by a full-automatic vacuum rotary drum, an extruder and a biaxial stretching unit, and the film outlet temperature is controlled to be 90-100 ℃.
3) And cooling, winding, packaging and warehousing.
The foregoing is a general idea of the present invention, and specific examples and comparative examples are provided below on the basis thereof for detailed description.
Example 1
A high-heat-resistance high-light-transmittance PET film comprises the following raw materials in parts by weight: 20 parts of polyethylene terephthalate, 8 parts of polyethylene naphthalate, 8 parts of polyethylene, 6 parts of polyurethane dispersoid, 6 parts of film-forming additive, 2 parts of sodium tripolyphosphate, 2 parts of antioxidant, 2 parts of polyacrylate resin, 2 parts of heat stabilizer, 2 parts of curing agent, 2 parts of coupling agent, 3 parts of polypropylene, 2 parts of polyethylene glycol and 3 parts of inorganic nano particles.
Wherein the inorganic nano particles are a mixture of nano montmorillonite (1 part by weight), nano silicon dioxide (1 part by weight) and nano cobalt tetraoxydi ferrate (1 part by weight). The curing agent is diaminodiphenylmethane. The coupling agent is a mixture of silane coupling agent a151(1 part by weight) and vinyl trimethoxy silane (1 part by weight). The antioxidant is antioxidant B225. The particle sizes of the nano silicon dioxide, the nano copper and the nano titanium dioxide are all 20nm-60 nm.
The preparation method of the PET film comprises the following steps:
1) adding the raw materials into a granulator, mixing and granulating again to prepare PET polyester granules, wherein the mixing temperature is controlled at 110-130 ℃;
2) the prepared PET polyester particles are subjected to production of PET films by a full-automatic vacuum rotary drum, an extruder and a biaxial stretching unit, and the film outlet temperature is controlled to be 90-100 ℃.
3) And cooling, winding, packaging and warehousing.
Example 2
The difference from the example 1 is only that the contents of the components in the high heat-resistant high-transmittance PET film are different, specifically:
a high-heat-resistance high-light-transmittance PET film comprises the following raw materials in parts by weight: 24 parts of polyethylene terephthalate, 9 parts of polyethylene naphthalate, 12 parts of polyethylene, 8 parts of polyurethane dispersoid, 4 parts of sodium tripolyphosphate, 3 parts of antioxidant, 3 parts of polyacrylate resin, 3 parts of heat stabilizer, 3 parts of curing agent, 3 parts of coupling agent, 4 parts of polypropylene, 4 parts of polyethylene glycol and 18 parts of inorganic nano particles.
Example 3
The difference from the example 1 is only that the contents of the components in the high heat-resistant high-transmittance PET film are different, specifically:
a high-heat-resistance high-light-transmittance PET film comprises the following raw materials in parts by weight: 28 parts of polyethylene terephthalate, 10 parts of polyethylene naphthalate, 16 parts of polyethylene, 10 parts of polyurethane dispersoid, 6 parts of sodium tripolyphosphate, 4 parts of antioxidant, 4 parts of polyacrylate resin, 5 parts of heat stabilizer, 4 parts of curing agent, 4 parts of coupling agent, 5 parts of polypropylene, 5 parts of polyethylene glycol and 30 parts of inorganic nano particles.
Comparative examples are provided below.
Comparative example 1
The only difference from example 1 is that: polyacrylate resins are not included.
Comparative example 2
The only difference from example 1 is that: thermal stabilizers are not included.
Comparative example 3
The only difference from example 1 is that: inorganic oxide nanoparticles are not included.
Comparative example 4
The only difference from example 1 is that: the inorganic oxide nano particles do not contain nano montmorillonite, and the nano silicon dioxide and the nano cobalt tetraoxide ferrate are both 2 parts by weight.
Comparative example 5
The only difference from example 1 is that: the inorganic oxide nano particles do not contain nano silicon dioxide, and the nano montmorillonite and the nano cobalt tetraoxide ferrate are both 2 parts by weight.
Comparative example 6
The only difference from example 1 is that: the inorganic nano particles do not contain nano cobalt tetraoxide ferrate, and the nano montmorillonite and the nano silicon dioxide are both 2 parts by weight.
The PET films obtained in examples 1 to 3 and comparative examples 1 to 6 were tested for haze and light transmittance according to GB/T2410. The heat shrinkage of the PET film was tested according to the specifications of GB/T169581.
The test items included the following:
1. heat shrinkage ratio: taking 5 square samples with the size of 120mm x 120mm, drawing mutually perpendicular 100mm x 100mm marked lines in the middle of the longitudinal direction and the transverse direction of the samples, horizontally placing the samples in a constant-temperature oven at the temperature of (150 +/-1) DEG C, keeping the temperature for 30min, taking out the samples, cooling the samples to the ambient temperature, measuring the length of the longitudinal marked line, calculating the thermal shrinkage rate of the samples, and taking the arithmetic average value.
2. Haze: an integrating sphere hazemeter;
3. light transmittance: a spectrophotometer model LAMBDA 35;
the test results are shown in table 1 below:
table 1: performance test result recording table
| Thermal shrinkage rate | Haze degree | Light transmittance | |
| Example 1 | 0.85％ | 0.30％ | 97.2％ |
| Example 2 | 0.83％ | 0.25％ | 97.8％ |
| Example 3 | 0.87％ | 0.28％ | 97.4％ |
| Comparative example 1 | 0.91％ | 0.45％ | 90.1％ |
| Comparative example 2 | 0.89％ | 0.50％ | 89.3％ |
| Comparative example 3 | 1.53％ | 0.35％ | 96.8％ |
| Comparative example 4 | 1.16％ | 0.52％ | 89.1％ |
| Comparative example 5 | 1.09％ | 0.55％ | 88.2％ |
| Comparative example 6 | 1.12％ | 0.48％ | 89.7％ |
From the test results of examples 1 to 3 of the table above, the following conclusions can be drawn: the PET film disclosed by the invention has excellent heat resistance and high light transmittance.
The results of comparing comparative examples 1 and 2 with example 1 show that: both the polyacrylate resin and the heat stabilizer can improve the light transmittance of the PET film, and the polyacrylate resin and the heat stabilizer have lower effect than the polyacrylate resin and the heat stabilizer in combination when used alone, which can show that the polyacrylate resin and the heat stabilizer can achieve the synergistic enhancement effect in the aspect of improving the light transmittance of the PET film after the polyacrylate resin and the heat stabilizer are combined.
The results of comparing comparative example 3 with example 1 can give: the inorganic nano particles have an important effect on improving the heat resistance; the results of comparing comparative examples 4 to 6 with example 1 show that: the effects of the nano montmorillonite, the nano silicon dioxide and the nano cobalt tetraoxide are not as good as the effects of the compounding of several materials when the nano montmorillonite, the nano silicon dioxide and the nano cobalt tetraoxide are used alone, so that the synergistic enhancement effect can be achieved in the aspect of improving the heat resistance of the PET film after the nano montmorillonite, the nano silicon dioxide and the nano cobalt tetraoxide are compounded and added.
While embodiments of the invention have been disclosed above, it is not limited to the applications listed in the description and the embodiments, which are fully applicable in all kinds of fields of application of the invention, and further modifications may readily be effected by those skilled in the art, so that the invention is not limited to the specific details without departing from the general concept defined by the claims and the scope of equivalents.
Claims (10)
1. The high-heat-resistance high-light-transmittance PET film is characterized by comprising the following raw materials in parts by weight: 20-28 parts of polyethylene terephthalate, 8-10 parts of polyethylene naphthalate, 8-16 parts of polyethylene, 6-10 parts of polyurethane dispersoid, 2-6 parts of sodium tripolyphosphate, 2-4 parts of antioxidant, 2-4 parts of polyacrylate resin, 2-5 parts of heat stabilizer, 2-4 parts of curing agent, 2-4 parts of coupling agent, 3-5 parts of polypropylene, 2-5 parts of polyethylene glycol and 3-30 parts of inorganic nanoparticles.
2. The PET film with high heat resistance and high light transmittance according to claim 1, wherein the raw materials for preparing the PET film with high heat resistance and high light transmittance comprise the following components in parts by weight: 24 parts of polyethylene terephthalate, 9 parts of polyethylene naphthalate, 12 parts of polyethylene, 8 parts of polyurethane dispersoid, 4 parts of sodium tripolyphosphate, 3 parts of antioxidant, 3 parts of polyacrylate resin, 3 parts of heat stabilizer, 3 parts of curing agent, 3 parts of coupling agent, 4 parts of polypropylene, 3 parts of polyethylene glycol and 18 parts of inorganic nano particles.
3. The highly heat-resistant highly light-transmitting PET film as claimed in claim 1 or 2, wherein the coupling agent is a mixture of silane coupling agent a151, vinyltrimethoxysilane.
4. The highly heat-resistant highly light-transmitting PET film as claimed in claim 1 or 2, wherein the antioxidant is one or more of antioxidant B225, antioxidant DLTP, antioxidant TPP.
5. The highly heat-resistant highly light-transmitting PET film as claimed in claim 1 or 2, wherein the heat stabilizer is triethyl phosphate.
6. The PET film with high heat resistance and high light transmittance according to claim 1 or 2, wherein the inorganic nanoparticles are a mixture of nano montmorillonite, nano silica and nano cobalt tetraoxydiphosphate.
7. The PET film with high heat resistance and high light transmittance according to claim 6, wherein the mass ratio of the nano montmorillonite to the nano silica to the nano cobalt tetraoxide is 2:1: 1.
8. The PET film with high heat resistance and high light transmittance according to any one of claim 7, wherein the nano montmorillonite, nano silica and nano cobalt tetraoxydi ferrate have particle sizes of 20nm-60 nm.
9. The highly heat-resistant highly light-transmitting PET film according to claim 1 or 2, wherein the curing agent is one or more of diaminodiphenylmethane, m-phenylenediamine, and diaminodiphenylsulfone.
10. The method for preparing a highly heat-resistant highly light-transmitting PET film according to any one of claims 1 to 9, characterized by comprising the steps of:
1) adding the raw materials into a granulator, mixing and granulating to prepare PET polyester granules, wherein the mixing temperature is controlled at 110-130 ℃;
2) the prepared PET polyester particles are subjected to production of PET films by a full-automatic vacuum rotary drum, an extruder and a biaxial stretching unit, and the film outlet temperature is controlled to be 90-100 ℃.
3) And cooling, winding, packaging and warehousing.
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| WO2024092563A1 (en) * | 2022-11-02 | 2024-05-10 | 扬州纳力新材料科技有限公司 | Modified polyester thin film, preparation method, composite current collector, electrode sheet and use thereof |
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| 辛忠: "《小分子调控大分子结晶：理论与实践》", 31 August 2016 * |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2024092563A1 (en) * | 2022-11-02 | 2024-05-10 | 扬州纳力新材料科技有限公司 | Modified polyester thin film, preparation method, composite current collector, electrode sheet and use thereof |
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|---|---|
| CN114106528B (en) | 2023-07-04 |
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