CN106554604A - A kind of polyester film for capacitors and preparation method - Google Patents
A kind of polyester film for capacitors and preparation method Download PDFInfo
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- CN106554604A CN106554604A CN201510631975.9A CN201510631975A CN106554604A CN 106554604 A CN106554604 A CN 106554604A CN 201510631975 A CN201510631975 A CN 201510631975A CN 106554604 A CN106554604 A CN 106554604A
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Abstract
The present invention discloses a kind of polyester film for capacitors and preparation method, it is characterised in that be made up of the raw material of following weight portion：Ethylene glycol terephthalate 2-5 parts, butanediol 5-10 parts, -4 parts of silica 1, calcium hydroxide 1-4 parts, barium sulfate 1-3 parts, Zinc Oxide 1-3 part, ethylene glycol 4-8 parts, glycerol 5-10 parts, dimethyl acetate 3-6 part, trimethyl phosphate 2-7 parts, calcium chloride 1-3 parts, polyester masterbatch 20-30 parts.Polyester film for capacitors simple production process provided by the present invention, it is not necessary to complicated production equipment or production procedure, the raw material environmental protection for being used will not produce harm to environment and human body.The mylar tensile property produced is excellent, and the electric property such as surface roughness, resistivity is satisfied by the requirement for making medium-to-high grade capacitor.
Description
Technical field
The invention belongs to technical field of high polymer material preparation, and in particular to a kind of polyester film for capacitors and preparation method.
Background technology
ICI Imperial Chemical Industries of Britain in 1948 and du pont company have applied for the patent for preparing mylar first, and while nineteen fifty-three polyester industrial, biaxially oriented polyester film also achieves industrialization.With developing rapidly for polyester industrial, the industrial also synchronized development of mylar, thin film become second main uses of polyester.Nineteen ninety Polyester yield is 866.7 ten thousand tons, and mylar yield accounts for the 10.5% of polyester output up to 91.2 ten thousand tons；Polyester increase of production in 1994 to 1088.5 ten thousand tons, mylar yield also grow simultaneously 109.9 ten thousand tons, account for the 10.1% of polyester output；Polyester film yield in 2000 is expected to reach 1,500,000 tons.
Mylar is except high with thickness of thin, strength, outside a variety of features such as prolonged indeformable, dimensionally stable, wear-resisting and agent of low hygroscopicity, also there is excellent dielectric properties and heat resistance, therefore can serve as the insulant and the electrolyte as capacitor of electric elements.
China's mylar industry is started late, but development speed is very fast.Nineteen ninety production capacity is 3.8 ten thousand tons, rises within 1996 70000 tons, and 2000 annual capacities are estimated more than 100,000 tons, and manufacturer is up to 25.Product principally serves as low-grade packaging material and least a portion of film and videotape recording, is used as the then less of capacitor films.
Common mylar is cannot be directly used in capacitor, used as the mylar of capacitor, it is desirable to which which has suitable surface roughness, suitable coefficient of friction, higher breakdown voltage, relatively low relative dielectric coefficient and relatively low dielectric loss.Furthermore it is required that thin film has higher tensile strength, moderate hardness, good easy to flexible and thermostability and winter resistance etc..As can be seen here, the mylar various aspects performance for application in the capacitor suffers from very strict requirements.
Existing mylar is difficult to meet as high pressure, the requirement of high capacity capacitor, it is only used for producing some capacitor products kept out, light, thin, the stable performance advantage of mylar cannot be played in field of capacitor manufacture, constrain the integrated and performance optimization of electronic product.
Chinese patent 201410825194.9, it is proposed that it is a kind of can the good mylar of high temperature resistant, barrier property and manufacture method, the thin film adopts light PET sections and the sections of the PET containing additive to add after a small amount of nano material mixes again for primary raw material and makes.The invention has been effectively improved the transparency of material, pigmentability；The flame retardant rating that material can be improved and the dimensional stability for improving material.The thin film proposed by the invention can apply to the insulant of part electrical equipment, and its electric property substantially meets the requirement of ordinary appliances.But the film stretchability can be poor, during production in enormous quantities, percent defective is higher, production efficiency cannot be guaranteed, its insulating properties is only capable of tackling common DC voltage simultaneously, puncture for high-frequency ac voltage is then easily caused, burn, therefore mylar made by the method is not particularly suited for making capacitor.
The content of the invention
For the deficiencies in the prior art, the present invention proposes a kind of polyester film for capacitors.The mylar various aspects of performance is satisfied by the required each side condition of capacitor production, and the preparation process of thin film does not use any poisonous and harmful raw material, will not cause any harm to human body and environment, and processing cost is very cheap.
The present invention solves the technical scheme that adopted of above-mentioned technical problem.
Roughness of film can be adjusted by adding corresponding particle in the feed, and the species of example, shape, addition and particle diameter distribution etc. directly affect the film surface degree of roughness of final production.By experiment, this research adjusts the surface roughness of thin film from particles such as addition silicon dioxide, Calcium Carbonate, it is ensured that the electric-breakdown resistance and moisture-proof of capacitor element, while and will not be inter-adhesive between thin film, impact to the course of processing.The thin film of manufacture capacitor is needed with enough tensile strengths, otherwise occur that crystalline rate is too high in process of production, so as to cause membrane difficult, percent defective is caused to raise, the present invention controls the crystalline rate of thin film, it is ensured that membrane is stable by introducing ethylene glycol, dimethyl acetate etc. in the feed, so that the film thickness produced is uniform, stable electrical properties.During manufacture capacitor, the resistivity of thin film also has a great impact to the performance of capacitor, if resistivity is too small, when thin film adsorbs on the cold drum can due to this during electric discharge phenomena and cause thin film to produce aperture, affect its insulating properties.If resistivity is excessive, thin film declines to the adsorptivity of cold drum, is unfavorable for the thickness made film.Therefore, the present invention adjusts the resistivity of thin film to suitable scope by adding the catalyst such as a small amount of trimethyl phosphate, calcium chloride in the feed.
The polyester film for capacitors that the present invention is provided is made up of the raw material of following weight fraction.
Ethylene glycol terephthalate 2-5 parts, butanediol 5-10 parts, -4 parts of silica 1, calcium hydroxide 1-4 parts, barium sulfate 1-3 parts, Zinc Oxide 1-3 part, ethylene glycol 4-8 parts, glycerol 5-10 parts, dimethyl acetate 3-6 part, trimethyl phosphate 2-7 parts, calcium chloride 1-3 parts, polyester masterbatch 20-30 parts.
Polyester film for capacitors preparation process of the present invention is.
（1）Ethylene glycol terephthalate, butanediol, barium sulfate, polyester masterbatch are carried out vacuum distillation to refine.
（2）By the dissolving of dimethyl acetate spent glycol, filter, and the recrystallization in glycerol.
（3）By silicon dioxide, Zinc Oxide, glycerol, trimethyl phosphate mixing, constant temperature is to 80-90 DEG C of reaction 20-40 minute.
（4）By step（1）、（2）、（3）Products therefrom is mixed and added into calcium chloride, and constant temperature adds calcium hydroxide to 120-130 DEG C, and adjustment pH value is to neutrality.
（5）By step（4）Gained translucent mixed liquor part dilute, film, drying, the mylar needed for obtaining.
The invention has the beneficial effects as follows：Polyester film for capacitors simple production process provided by the present invention, it is not necessary to complicated production equipment or production procedure, the raw material environmental protection for being used will not produce harm to environment and human body.The mylar tensile property produced is excellent, and the electric property such as surface roughness, resistivity is satisfied by the requirement for making medium-to-high grade capacitor.
Specific embodiment
Embodiment 1.
Polyester film for capacitors mentioned by the embodiment is made up of the raw material of following weight fraction.
3 parts of ethylene glycol terephthalate, 7 parts of butanediol, 3 parts of silicon dioxide, 4 parts of calcium hydroxide, 2 parts of barium sulfate, 3 parts of Zinc Oxide, 5 parts of ethylene glycol, 6 parts of glycerol, 4 parts of dimethyl acetate, 5 parts of trimethyl phosphate, 2 parts of calcium chloride, 25 parts of polyester masterbatch.
Preparation process is.
（1）Ethylene glycol terephthalate, butanediol, barium sulfate, polyester masterbatch are carried out vacuum distillation to refine.
（2）By the dissolving of dimethyl acetate spent glycol, filter, and the recrystallization in glycerol.
（3）By silicon dioxide, Zinc Oxide, glycerol, trimethyl phosphate mixing, constant temperature is to 80-90 DEG C of reaction 20-40 minute.
（4）By step（1）、（2）、（3）Products therefrom is mixed and added into calcium chloride, and constant temperature adds calcium hydroxide to 120-130 DEG C, and adjustment pH value is to neutrality.
（5）By step（4）Gained translucent mixed liquor part dilute, film, drying, the mylar needed for obtaining.
Embodiment 2.
Polyester film for capacitors mentioned by the embodiment is made up of the raw material of following weight fraction.
4 parts of ethylene glycol terephthalate, 5 parts of butanediol, 2 parts of silicon dioxide, 3 parts of calcium hydroxide, 2 parts of barium sulfate, 1 part of Zinc Oxide, 4 parts of ethylene glycol, 7 parts of glycerol, 3 parts of dimethyl acetate, 3 parts of trimethyl phosphate, 2 parts of calcium chloride, 25 parts of polyester masterbatch.
Preparation process is.
（1）Ethylene glycol terephthalate, butanediol, barium sulfate, polyester masterbatch are carried out vacuum distillation to refine.
（2）By the dissolving of dimethyl acetate spent glycol, filter, and the recrystallization in glycerol.
（3）By silicon dioxide, Zinc Oxide, glycerol, trimethyl phosphate mixing, constant temperature is to 80-90 DEG C of reaction 20-40 minute.
（4）By step（1）、（2）、（3）Products therefrom is mixed and added into calcium chloride, and constant temperature adds calcium hydroxide to 120-130 DEG C, and adjustment pH value is to neutrality.
（5）By step（4）Gained translucent mixed liquor part dilute, film, drying, the mylar needed for obtaining.
Embodiment 3.
Polyester film for capacitors mentioned by the embodiment is made up of the raw material of following weight fraction.
5 parts of ethylene glycol terephthalate, 9 parts of butanediol, 3 parts of silicon dioxide, 4 parts of calcium hydroxide, 2 parts of barium sulfate, 2 parts of Zinc Oxide, 8 parts of ethylene glycol, 10 parts of glycerol, 6 parts of dimethyl acetate, 7 parts of trimethyl phosphate, 2 parts of calcium chloride, 30 parts of polyester masterbatch.
Preparation process is.
（1）Ethylene glycol terephthalate, butanediol, barium sulfate, polyester masterbatch are carried out vacuum distillation to refine.
（2）By the dissolving of dimethyl acetate spent glycol, filter, and the recrystallization in glycerol.
（3）By silicon dioxide, Zinc Oxide, glycerol, trimethyl phosphate mixing, constant temperature is to 80-90 DEG C of reaction 20-40 minute.
（4）By step（1）、（2）、（3）Products therefrom is mixed and added into calcium chloride, and constant temperature adds calcium hydroxide to 120-130 DEG C, and adjustment pH value is to neutrality.
（5）By step（4）Gained translucent mixed liquor part dilute, film, drying, the mylar needed for obtaining.
Claims (2)
1. a kind of polyester film for capacitors, it is characterised in that be made up of the raw material of following weight portion：Ethylene glycol terephthalate 2-5 parts, butanediol 5-10 parts, -4 parts of silica 1, calcium hydroxide 1-4 parts, barium sulfate 1-3 parts, Zinc Oxide 1-3 part, ethylene glycol 4-8 parts, glycerol 5-10 parts, dimethyl acetate 3-6 part, trimethyl phosphate 2-7 parts, calcium chloride 1-3 parts, polyester masterbatch 20-30 parts.
2. a kind of polyester film for capacitors and preparation method, it is characterised in that comprise the following steps：
（1）Ethylene glycol terephthalate, butanediol, barium sulfate, polyester masterbatch are carried out vacuum distillation to refine；
（2）By the dissolving of dimethyl acetate spent glycol, filter, and the recrystallization in glycerol；
（3）By silicon dioxide, Zinc Oxide, glycerol, trimethyl phosphate mixing, constant temperature is to 80-90 DEG C of reaction 20-40 minute；
（4）By step（1）、（2）、（3）Products therefrom is mixed and added into calcium chloride, and constant temperature adds calcium hydroxide to 120-130 DEG C, and adjustment pH value is to neutrality；
（5）By step（4）Gained translucent mixed liquor part dilute, film, drying, the mylar needed for obtaining.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
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| CN201510631975.9A CN106554604A (en) | 2015-09-29 | 2015-09-29 | A kind of polyester film for capacitors and preparation method |
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| Application Number | Priority Date | Filing Date | Title |
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| CN201510631975.9A CN106554604A (en) | 2015-09-29 | 2015-09-29 | A kind of polyester film for capacitors and preparation method |
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| CN106554604A true CN106554604A (en) | 2017-04-05 |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106971847A (en) * | 2017-04-27 | 2017-07-21 | 莆田学院 | A kind of thin film capacitor |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106971847A (en) * | 2017-04-27 | 2017-07-21 | 莆田学院 | A kind of thin film capacitor |
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Application publication date: 20170405 |
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