CN114106528B - High heat-resistant high-light-transmittance PET 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 dispersion, 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 nano particles. The PET film provided 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 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 use at present, and has been synthesized as early as the twentieth century in 40 s, and has been found to have excellent properties, but is widely used in the fields of textiles, packaging, medical and health, automobiles, electronic and electrical appliances, safety protection, environmental protection, and the like. With the improvement of society, the requirements on PET performance are higher and more diversified due to the improvement of the living standard of people. However, the existing PET film is affected by temperature and transmittance, so that the application of the PET film is not ideal in certain fields. Such as a high temperature region where electrical equipment exists, which may cause problems of irreversible deformation, etc.
Disclosure of Invention
The technical problem to be solved by the invention is to provide the PET film with high heat resistance and high light transmittance aiming at the defects in the prior art.
In order to solve the technical problems, the invention adopts the following technical scheme: the PET film with high heat resistance and high light transmittance 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 dispersion, 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 nano particles.
Preferably, the material 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 dispersion, 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 Triethylphosphate (TEPA).
Preferably, the curing agent is one or more of diaminodiphenyl methane, 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 silicon dioxide, nano calcium carbonate and nano cobalt tetraoxide ferrite.
Preferably, the mass ratio of the nano montmorillonite to the nano silicon dioxide to the nano calcium carbonate to the nano cobalt tetraoxide to the cobalt ferrite is 2:1:1:1.
Preferably, the particle diameters of the nano montmorillonite, the nano silicon dioxide, the nano calcium carbonate and the nano cobalt tetraoxide ferrite are all 20-60 nm.
The invention also provides a preparation method of the PET film with high heat resistance and high light transmittance, which comprises the following steps:
1) Adding the raw materials into a granulator, mixing and granulating to obtain PET polyester particles, wherein the mixing temperature is controlled at 110-130 ℃;
2) And (3) producing the PET film by using the prepared PET polyester particles through a full-automatic vacuum rotary drum, an extruder and a biaxial stretching machine set, wherein the film outlet temperature is controlled at 90-100 ℃.
3) Cooling, winding, packaging and warehousing.
The beneficial effects of the invention are as follows: the invention provides a PET film with high heat resistance and high light transmittance, and 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 increase the wear resistance and 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 performance. The PET film provided 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 described in further detail below with reference to examples to enable those skilled in the art to practice the same by referring 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-resistant 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 dispersion, 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 nano particles.
Wherein, the blending of polyethylene terephthalate and polyethylene naphthalate can obviously improve the heat resistance of the PET film; the polyurethane dispersion can effectively increase the wear resistance and 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 performance.
The polyacrylate resin can improve the light transmittance of the PET film, but the viscosity is easily increased and the fluidity is reduced when the polyacrylate resin is singly added, the viscosity can be adjusted by adding polyethylene and polyethylene glycol, the light transmittance of the PET film is improved by the polyacrylate resin, meanwhile, the hydrolysis resistance of the obtained copolyester can be improved by the polyethylene glycol, and the hydrolysis resistance of the copolyester can be further improved.
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 a silane coupling agent a151 and vinyl trimethoxy silane.
Wherein the curing agent is one or more of diaminodiphenyl methane, m-phenylenediamine and diaminodiphenyl sulfone.
Wherein the inorganic nano particles are a mixture of nano montmorillonite, nano silicon dioxide and nano cobalt tetraoxide ferrite. More preferably, the mass ratio of the mixture of the nano montmorillonite, the nano silicon dioxide and the nano cobalt tetraoxide ferrite is 2:1:1. The particle diameters of the nano montmorillonite, the nano silicon dioxide and the nano cobalt tetraoxide ferrite are all 20nm-60nm.
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 ferrite are added in a compounding way, 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 PET film with high heat resistance and high light transmittance, which comprises the following steps:
1) Adding the raw materials into a granulator, mixing and re-granulating to obtain PET polyester particles, wherein the mixing temperature is controlled at 110-130 ℃;
2) And (3) producing the PET film by using the prepared PET polyester particles through a full-automatic vacuum rotary drum, an extruder and a biaxial stretching machine set, wherein the film outlet temperature is controlled at 90-100 ℃.
3) Cooling, winding, packaging and warehousing.
The foregoing is a general inventive concept and the following specific examples and comparative examples are provided on the basis thereof to make detailed descriptions.
Example 1
The PET film with high heat resistance and high light transmittance 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 dispersion, 6 parts of film forming auxiliary agent, 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 tetraoxide ferrite (1 part by weight). The curing agent is diamino diphenyl methane. The coupling agent is a mixture of silane coupling agent a151 (1 part by weight) and vinyltrimethoxysilane (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-60nm.
The preparation method of the PET film comprises the following steps:
1) Adding the raw materials into a granulator, mixing and re-granulating to obtain PET polyester particles, wherein the mixing temperature is controlled at 110-130 ℃;
2) And (3) producing the PET film by using the prepared PET polyester particles through a full-automatic vacuum rotary drum, an extruder and a biaxial stretching machine set, wherein the film outlet temperature is controlled at 90-100 ℃.
3) Cooling, winding, packaging and warehousing.
Example 2
The difference from example 1 is only that the content of each component in the high heat-resistant high light-transmitting PET film is different, specifically:
the PET film with high heat resistance and high light transmittance 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 dispersion, 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 example 1 is only that the content of each component in the high heat-resistant high light-transmitting PET film is different, specifically:
the PET film with high heat resistance and high light transmittance 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 dispersion, 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: heat 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 comprise nano montmorillonite, and the nano silicon dioxide and the nano cobalt tetraoxide ferrite are 2 parts by weight.
Comparative example 5
The only difference from example 1 is that: the inorganic oxide nano particles do not comprise nano silicon dioxide, and the nano montmorillonite and the nano cobalt tetraoxide ferrite are 2 parts by weight.
Comparative example 6
The only difference from example 1 is that: the inorganic nano particles do not comprise nano cobalt tetraoxide ferrite, and the nano montmorillonite and the nano silicon dioxide are 2 parts by weight.
The PET films produced in examples 1 to 3 and comparative examples 1 to 6 were tested for haze and light transmittance according to GB/T2410. The PET film was tested for heat shrinkage according to the GB/T16958 specification.
The test items include the following:
1. heat shrinkage rate: taking 5 square samples with the size of 120mm and 120mm, drawing mutually perpendicular marks with the size of 100mm in the middle of the longitudinal direction and the transverse direction of the samples, horizontally placing the samples in a constant-temperature oven with the temperature of (150+/-1) DEG C, taking out the samples after 30 minutes, measuring the length of the longitudinal marks after cooling to the ambient temperature, calculating the thermal shrinkage rate of the samples, and taking arithmetic average values.
2. Haze: an integrating sphere haze meter;
3. transmittance: LAMBDA type 35 spectrophotometer;
the test results are shown in table 1 below:
table 1: performance test result record table
| Heat shrinkage rate | Haze degree | Transmittance of light | |
| 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 1-3 of the above table, the following conclusions can be drawn: the PET film provided by the invention has excellent heat resistance and high light transmittance.
From the comparison of comparative examples 1, 2 with example 1, it can be seen that: the polyacrylate resin and the heat stabilizer can both improve the light transmittance of the PET film, and the effect is inferior to that of the polyacrylate resin and the heat stabilizer when the polyacrylate resin and the heat stabilizer are used independently, so that the effect of synergistic enhancement can be achieved in the aspect of improving the light transmittance of the PET film after the polyacrylate resin and the heat stabilizer are used in a compounding way.
From the comparison of comparative example 3 with example 1, it can be seen that: the inorganic nano particles play an important role in improving heat resistance; the comparison of comparative examples 4-6 with example 1 gives: the effect of the nano montmorillonite, nano silicon dioxide and nano cobalt tetraoxide ferrite is not as good as that of the composite use of several materials when the nano montmorillonite, nano silicon dioxide and nano cobalt tetraoxide ferrite are singly used, and 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 ferrite are added in a composite mode.
Although embodiments of the present invention have been disclosed above, it is not limited to the use of the description and embodiments, it is well suited to various fields of use for the invention, and further modifications may be readily apparent to those skilled in the art, and accordingly, the invention is not limited to the particular details without departing from the general concepts defined in the claims and the equivalents thereof.
Claims (8)
1. The high heat-resistant 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 dispersion, 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 nano particles;
the inorganic nano particles are a mixture of nano montmorillonite, nano silicon dioxide and nano cobalt tetraoxide ferrite;
the mass ratio of the nano montmorillonite to the nano silicon dioxide to the nano cobalt tetraoxide ferrite is 2:1:1.
2. The high heat-resistant high light-transmitting PET film according to claim 1, wherein the raw materials for preparing the high heat-resistant high light-transmitting PET film comprise 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 dispersion, 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 high heat-resistant high light-transmitting PET film according to claim 1 or 2, wherein the coupling agent is a mixture of silane coupling agent a151 and vinyltrimethoxysilane.
4. The high heat resistance and high light transmittance PET film according to claim 1 or 2, wherein the antioxidant is one or more of antioxidant B225, antioxidant DLTP, antioxidant TPP.
5. The high heat resistance and high light transmittance PET film according to claim 1 or 2, wherein the heat stabilizer is triethylphosphate.
6. The high heat-resistant high light-transmitting PET film according to claim 1, wherein the particle sizes of the nano montmorillonite, the nano silicon dioxide and the nano cobalt tetraoxide ferrite are all 20-60 nm.
7. The high heat-resistant high light-transmitting PET film according to claim 1 or 2, wherein the curing agent is one or more of diaminodiphenylmethane, metaphenylene diamine, and diaminodiphenyl sulfone.
8. The high heat resistance and high light transmittance PET film according to any one of claims 1 to 7, wherein the high heat resistance and high light transmittance PET film is obtained by:
1) Adding the raw materials into a granulator, mixing and granulating to obtain PET polyester particles, wherein the mixing temperature is controlled at 110-130 ℃;
2) The prepared PET polyester particles are subjected to PET film production through a full-automatic vacuum rotary drum, an extruder and a biaxial stretching machine set, and the film outlet temperature is controlled to be 90-100 ℃;
3) Cooling, winding, packaging and warehousing.
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| CN105778435B (en) * | 2014-12-18 | 2017-07-21 | 江苏裕兴薄膜科技股份有限公司 | PET compounds of heat-proof aging dielectric film and preparation method thereof |
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| CN106832823B (en) * | 2017-03-20 | 2018-11-30 | 江苏裕兴薄膜科技股份有限公司 | A kind of high temperature resistant PET polyester film and preparation method thereof |
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