89 results about "Phthalonitrile" patented technology

The invention relates to the technical field of electronic packaging materials, in particular to a phthalonitrile modified thermosetting resin composition containing a siloxane structure and application of the phthalonitrile modified thermosetting resin composition in the electronic packaging materials. The composition comprises multifunctional epoxy resin, XYLOK phenolic resin, a curing accelerator, a modifier and an inorganic filler, and the modifying agent is eugenol phthalonitrile trisiloxane. The modifier disclosed by the invention has good mechanical compatibility and dispersity in matrix resin; when the epoxy resin is applied to a thermosetting resin system, the processability can be improved, and the toughness of a cured product can be effectively improved while the glass-transition temperature is increased, so that the cured product has excellent bending property; the composition has excellent thermal stability, low bending modulus, good impact performance and humidity and heat resistance after being cured, the glass transition temperature of the composition is effectively improved, the comprehensive performance of resin is remarkably improved, and the composition is suitable for improving the packaging reliability and environmental stability of semiconductor devices.

The invention relates to organic silicon modified phthalonitrile resin and a preparation method and application thereof.The organic silicon modified phthalonitrile resin is synthesized through a two-step method, the obtained product has certain fluidity in a room temperature environment due to the existence of silicon-oxygen bonds, and the silicon-oxygen bonds have high bond energy so that the silicon-oxygen bonds can not be easily decomposed in a high-temperature environment; meanwhile, high machinability and high temperature resistance are achieved, the synthesis process is simple, and universality is achieved. The resin can be used for easily preparing a composite material prepreg, and is compatible with various composite material forming methods, so that the application prospect of the resin in the field of composite materials is greatly expanded.

The invention relates to the technical field of electronic packaging materials, in particular to a thermosetting resin composition for packaging a high-reliability semiconductor device. The composition comprises multifunctional epoxy resin, XYLOK phenolic resin, a curing accelerator, a modifier and an inorganic filler, and the modifying agent is eugenol phthalonitrile polysiloxane. The modifier has good mechanical compatibility and dispersity in matrix resin; and when being applied to a thermosetting resin system, the epoxy resin can improve the processability and effectively enhance the toughness of a cured product. The composition provided by the invention accords with the processing and forming process of the existing epoxy molding compound; according to the present invention, the spiral flow length of the molding compound is substantially increased, the processing performance is good, the cured product has advantages of good thermal stability, low bending modulus, good impact property and good heat and humidity resistance, and the glass transition temperature is increased. The resin is significantly improved in comprehensive performance, and is suitable for packaging semiconductor devices with high requirements on reliability and environmental stability.

The invention discloses a moisture-proof and heat-insulating refractory material and a preparation method thereof, and relates to the technical field of refractory materials, and the moisture-proof and heat-insulating refractory material comprises dolomite, nano silicon dioxide, silica, an anhydrous binder and a moisture-proof agent. The synthesized moisture-proof agent is obtained by modifying asphalt through modified SBS obtained by grafting SBS and a monomer product containing terminal carbon-carbon double bonds, phosphate and a phthalonitrile structure, and has excellent flame retardance, high temperature resistance and waterproofness. And by using the nano silicon dioxide, the heat insulation performance of the refractory material can meet the requirements. The refractory material disclosed by the invention is excellent in refractoriness and moisture resistance and worthy of popularization and application.

The invention relates to the technical field of silicone rubber, in particular to high-temperature-resistant flame-retardant silicone rubber, a preparation method thereof and a cable, the high-temperature-resistant flame-retardant silicone rubber comprises a gradient layer material composed of a surface layer material, a transition layer material and a core layer material, and the surface layer material comprises methyl vinyl silicone rubber, superfine furnace black, calcium stannate, polyacrylonitrile aerogel and a flame-retardant premix; the transition layer material comprises methyl vinyl silicone rubber, superfine furnace carbon black, spandex fibers, polyarylester, calcium stannate and a flame-retardant premix; the core layer material is prepared from methyl vinyl silicone rubber, superfine furnace black, aramid fiber, polyarylester, phthalonitrile resin and 2-mercaptobenzothiazole zinc salt; wherein the flame-retardant premix is prepared from hydroquinone bis (diphenyl) phosphate, phenyl ethyl aluminum phosphinate and zinc hypophosphite according to the weight ratio of (6 to 10): (2 to 4): (1 to 3); the problems that an existing material is prone to aging in an extreme environment, the flame retardant effect is poor, and the mechanical property is degraded are effectively solved.

The invention relates to the technical field of high polymer materials, in particular to a method for improving the heat resistance of melamine phenolic resin by using phthalonitrile, which comprises the following steps: uniformly mixing phthalonitrile resin powder and melamine phenolic resin powder at room temperature, and then curing and molding the uniformly mixed powder at 200-280 DEG C to obtain the heat-resistant melamine phenolic resin. The melamine phenolic aldehyde-nitrile group copolymer resin is obtained. According to the method for obtaining the melamine phenolic-nitrile resin with high thermal stability, high wear resistance and high mechanical property through copolymerization, not only can the thermal stability of the resin be greatly improved, but also the mechanical property can be enhanced, and the processing window of the melamine phenolic resin can be widened.

The invention relates to high-temperature-resistant and thermo-oxidative resin, a synthesis method and a preparation method of a composite material of the high-temperature-resistant and thermo-oxidative resin, and belongs to the technical field of functional polymer materials. The high-temperature-resistant and heat-oxygen-resistant resin is silicon and boron-containing phthalonitrile copolymerized and modified phenolic aldehyde type cyanate ester resin; wherein the molecular formula is shown in the specification.

The application belongs to the technical field of polymer materials, and discloses a modified asphalt for durable thin-layer pavement, a preparation method, application and wearing layer thereof; the modified asphalt comprises the following components in mass fraction: 100 parts of asphalt, 10-20 parts of thermoplastic elastomer, 2-5 parts of tackifier and an additive; the tackifier is phthalonitrile resin; the thermoplastic elastomer contains not less than 90 wt% of SBS; the modified asphalt is synergistically modified by the tackifier and the thermoplastic elastomer, so that the obtained modified asphalt has excellent high-temperature performance, low-temperature performance and aging resistance, and is particularly suitable for durable thin-layer pavement; and the wearing layer prepared by the modified asphalt has excellent fatigue durability.

An optical assembly as described herein may comprise a first optical component and a second optical component bonded to the first optical component with a phthalonitrile adhesive. The phthalonitrile adhesive is configured to withstand high temperatures with little or no effect on the alignment of the first and second optical components and / or the optical transmission between the first and second optical components. Methods of making an optical assembly may include bonding a first optical component to a second optical component using a phthalonitrile adhesive.

The invention discloses a metal organic optical waveguide material with lyochromism and application of the metal organic optical waveguide material in the field of information storage. The preparation method of the material comprises the following steps: mixing phthalonitrile and silver tetrafluoroborate according to a molar ratio of 0.005-70, then adding acetonitrile for ultrasonic dissolution, slowly volatilizing at room temperature, and obtaining the microcrystalline material after the solvent is volatilized. Placing the coordination polymer in a humid environment for 12 hours, wherein the structure of the coordination polymer is connected from a one-dimensional coordination polymer to a two-dimensional coordination polymer; then placing in an acetonitrile atmosphere for 20 hours to convert the structure from a two-dimensional coordination polymer to a one-dimensional coordination polymer; the structure conversion and color conversion cycle is reversible. According to the invention, not only is solvent-induced tunable photoluminescence realized, but also a color-tunable optical waveguide system is constructed, a miniature active optical waveguide system with high safety and high information density is developed by using the material, and the application of the material in the field of information storage is shown.

To provide a production method for a phthalocyanine compound that enables high-purity production of a phthalocyanine compound having an ester side chain.SOLUTION: A method for producing a phthalocyanine compound comprises a step of mixing a phthalonitrile compound represented by general formula (1), a metal compound, and a compound represented by general formula (5), wherein in general formula (1), Z1 to Z4 each independently represent a hydrogen atom, a halogen atom, an alkoxy group, or the like, and at least one of Z1 to Z4 is a substituent represented by general formula (2); in general formula (2), L represents an alkylene or arylene group, and R represents an alkyl group or an aryl group; and in general formula (5), R is the same as R in general formula (2).SELECTED DRAWING: None

The present application relates to heat exchanger technical field, specifically to a kind of corrosion-resistant composite finned tube and its preparation process.The present application obtains flame retardant with allyl bisphenol A and 4-nitro phthalonitrile as main raw material.Then with four sulfur alcohol A, four sulfur alcohol B, 1,4-butanediol diacrylate as main raw material, curing agent is obtained.Finally, with epoxy resin E20, epoxy resin E12, polyether polyol, filler, flame retardant, curing agent, defoaming agent, accelerator and photoinitiator as raw material, epoxy resin coating is obtained;The epoxy resin coating is coated to the surface of finned tube, and the finished product is obtained.The finished product obtained by the present application has good flame retardancy, corrosion resistance and mechanical properties, so it has broad application prospect.

The application relates to the technical field of sealing strips, and discloses a water-resistant rubber sealing strip for automobiles and a preparation method thereof. The water-resistant rubber sealing strip for automobiles comprises the following components in parts by weight: 100 parts of a ternary ethylene-propylene-diene rubber pretreatment, 10-16 parts of carbon black, 3-5 parts of a vulcanizing agent, 1-2 parts of a vulcanizing accelerator, 1-3 parts of a dispersing agent, 4-6 parts of stearic acid and 1-2 parts of an antioxidant; the ternary ethylene-propylene-diene rubber pretreatment comprises the following components in parts by weight: 50 parts of ternary ethylene-propylene-diene rubber, 12-22 parts of nitrile rubber, 4-12 parts of phthalonitrile resin, 0.5-1.2 parts of a curing agent and 6-15 parts of four acicular zinc oxide whiskers. The technical scheme can solve the problem of poor oil resistance of rubber sealing strips in the related art.

The invention belongs to the technical field of precision grinding tool manufacturing, discloses a laser processing grinding wheel and a preparation method thereof, and aims to solve the problems that in the prior art, the bonding strength of a grinding material layer and a base body is weak, and harsh grinding requirements such as high-speed grinding, heavy-load grinding and composite material large-engagement synchronous grinding are difficult to meet. A laser machining grinding wheel comprises a grinding wheel base body and a grinding wheel abrasive layer. Inclined array blind holes are formed in the surface of the grinding wheel base body, and the grinding wheel abrasive layer is located on the surface of the grinding wheel base body and in the array blind holes. The raw materials of the grinding wheel abrasive material layer comprise amido modified titanate and phthalonitrile resin. According to the grinding wheel, the grinding material layer containing the phthalonitrile resin is subjected to 3D photocuring forming through the large-focus laser, the blind hole array is fully filled with the high-temperature-resistant, low-shrinkage and high-strength grinding material layer, and the grinding wheel product which is formed by high-strength combination of the grinding material layer and the base body and can be used at the high temperature for a long time is obtained.

A method for producing a phthalonitrile, the method comprising: a production reaction step in which ammonia, oxygen, and xylene are allowed to react in the presence of a catalyst to obtain a reaction product gas containing at least a phthalonitrile and urea; a collection step in which the reaction product gas is brought into contact with an organic solvent to obtain a collection solution; a distillation step in which the collection solution is distilled to separate the phthalonitrile and the organic solvent containing the urea; a water addition step in which water is added to the organic solvent containing the urea; and an aqueous phase separation step in which an aqueous phase containing the urea is separated from the organic solvent.

Separation and impurity removal equipment for phthalonitrile production belongs to the field of phthalonitrile production and comprises a temperature control mechanism and a stirring mechanism. The temperature control mechanism comprises a heat preservation seat, a circulating water pipe and a semiconductor chilling plate, the heat preservation seat is arranged on the side wall of the impurity removal box, a heat conduction plate is arranged in the heat preservation seat, the circulating water pipe penetrates through the heat conduction plate, and the semiconductor chilling plate is arranged on the outer side of the heat preservation seat; the stirring mechanism comprises a stirring rod and a spiral stirring blade, the stirring rod is arranged in the impurity removal box body, and the spiral stirring blade is arranged on the circumferential side wall of the stirring rod. The temperature control mechanism is arranged, the washing temperature in the impurity removal box body is maintained in the temperature control mechanism through a circulating water pipe, and when the washing temperature is rapidly increased due to the change of the environment temperature, rapid refrigeration is conducted through a semiconductor refrigeration piece, and phthalonitrile crystals are prevented from being decomposed; the phthalonitrile and the adsorption liquid in the impurity removal box body are turned over and mixed from bottom to top through the spiral stirring blades in the stirring mechanism, so that the layering or precipitation of the phthalonitrile is reduced, and the stirring is more uniform.

The application discloses a phthalonitrile resin with a siloxane chain structure, and the structure is shown in the following formula, wherein x is an integer of 1-50, y is an integer of 5-23, z is an integer of 5-23, and the molar ratio of the siloxane chain grafted with a benzoxazine monomer and the siloxane chain grafted with a phthalonitrile monomer is 1:0.9-1.1.In the application, the phthalonitrile resin takes siloxane as a main chain, and a side chain comprises a substituted benzoxazine structure and a phthalonitrile structure.Compared with a petroleum-based phthalonitrile resin without siloxane, the resin of the application can still maintain high heat resistance after curing, and the processing fluidity is significantly improved, the melt viscosity is reduced, the curing temperature is reduced, the material toughness is effectively improved, and the resin is suitable for fields such as aerospace, advanced composite materials and electronic packaging which have a synergistic requirement for heat resistance and processability.

The invention discloses high-temperature-resistant wave-transparent phthalonitrile aerogel as well as a rapid preparation method and application thereof, and belongs to the technical field of high-temperature-resistant wave-transparent materials and preparation thereof. According to the invention, the defects of high reaction temperature, long reaction time and the like in the existing preparation process of the phthalonitrile resin aerogel are overcome. According to the preparation method, the phthalonitrile resin is taken as a matrix raw material, a cosolvent mediation strategy is adopted, HMTA is efficiently introduced into a reaction system and is taken as a catalyst to play a core catalytic role, and rapid preparation of the phthalonitrile resin aerogel is realized through a sol-gel method. The prepared phthalonitrile resin aerogel has excellent thermal stability and extremely low dielectric constant, can be applied to high-temperature-resistant wave-transparent parts such as high-Mach-number aircraft radomes, antenna windows and spaceflight detectors, can also be expanded to the field of high-temperature-resistant wave-transparent materials in other extreme high-temperature environments, and is high in practicability and wide in application prospect.

The invention relates to a bearing-heat-proof integrated composite material and a preparation method and application thereof, the preparation method comprises the following steps: (1) dipping a plurality of fiber fabrics in a setting agent solution, taking out the fiber fabrics, and laying the fiber fabrics in an RTM forming mold layer by layer to form a preform; wherein the preform sequentially comprises at least three layers of combined fabrics, the content of carbon fiber tows of the combined fabrics is gradually reduced layer by layer, and each layer of combined fabrics is obtained by overlapping a plurality of layers of fiber fabrics; and (2) closing the RTM forming mold, injecting molten phthalonitrile resin into the mold, and then carrying out curing forming to obtain the bearing-heat protection integrated composite material. The load-bearing and heat-proof integrated composite material prepared by the invention uses the same resin system, adopts an RTM (Resin Transfer Molding) process for one-time injection and curing molding, is short in molding period, and avoids the bonding and assembling procedures of a traditional structure heat-proof material.

Disclosed herein are the synthesis and characterisations of the monoacrylate-functionalised phthalonitriles (PNs). Their chemical structures are verified with 1H nuclear magnetic resonance (NMR) and Fourier transform infrared (FT-IR) spectra to confirm the successful synthesis. Subsequently, photopolymerisable resins, based on the prepared PN monomer, a commercial diacrylate and other additives can be formulated. Being post thermally treated, the PN based resins result in polymeric products with excellent thermal and mechanical performances, suggesting the high-performance nature of the PN based resins. Interestingly, the resins exhibit significant high carbon yield, indicating that they are greatly promising candidates as carbon precursors. As it is found that the resins have good three-dimensional (3D) printing capability and can be fabricated using high-resolution projection micro-stereolithography (PμSL) additive manufacturing technology, complex 3D structured objects are herein printed and performed follow-up post treatment. After being progressively pyrolysed up to 1000° C., the printed objects can be readily converted to glassy carbon (GC) structures with structural integrity and fidelity. Only ˜25% of shrinkage was found for the converted GC structure due to the significantly high char yield of the PN resins. This work not only expands the library of new class of high-performance PN resins for popular additive manufacturing but also features the precision 3D printing of GC with low shrinkage and high carbon yield for the first time.

The invention discloses a preparation method of a pure iodine broadband gap perovskite solar cell based on difluorophthalonitrile passivation, and relates to the technical field of solar cells. According to the cell, the surface of perovskite is treated through difluorophthalonitrile, on one hand, fluorine atoms and cyano groups have strong electronegativity, so that the center of a benzene ring is positively charged, charged iodine defects can be attracted through anion-pi interaction, further diffusion of the iodine defects is prevented, and ion migration is inhibited; on the other hand, fluorine atoms can interact with hydrogen atoms on organic cations in perovskite through hydrogen bonds, organic components are stabilized, and volatilization or decomposition of the organic components is inhibited. And fluorine can also form a hydrophobic protection layer on the surface of the perovskite, so that the environmental stability of the perovskite cell is improved. On the basis, the surface and interface defects of the perovskite are obviously reduced, and ion migration and non-radiative recombination are inhibited, so that the photoelectric conversion efficiency of the perovskite solar cell is improved, and the hysteresis effect of the device is reduced.

The invention relates to a benzoxazine compound, maleimide-benzoxazine resin and a resin monomer, and belongs to the technical field of electronic materials. The first technical problem solved by the invention is to provide the benzoxazine compound. The structural formula of the compound is shown as a formula (1a) or a formula (1b). The diphenyl ether is introduced into the benzoxazine monomer through molecular design, the designed molecule can form linear main chain type benzoxazine, the synthesis method of the benzoxazine compound is simple, and the controllability of the reaction process can be realized. According to the invention, through interaction of the benzoxazine-phthalonitrile resin and the maleimide resin which are different in functionalization, the dielectric constant and the dielectric loss can be reduced; the thermal stability of the benzoxazine resin is improved to a certain extent, and meanwhile, the processing window is widened. Formula (1a) and formula (1b)

The application relates to a preparation method of graphene oxide modified phthalonitrile resin, and belongs to the technical field of high-temperature-resistant resin toughening and reinforcing. The preparation method of the graphene oxide modified phthalonitrile resin comprises the following steps: performing cyanogen modification on the surface of graphene oxide by using amino-phthalonitrile; performing mechanical blending and dispersion of the modified graphene and phthalonitrile resin; finally, heating and curing the resin to obtain a modified phthalonitrile resin curing product or prepare a fiber-reinforced phthalonitrile resin-based composite material. The cyanogen modification of the graphene oxide helps to improve the compatibility of the graphene oxide and the phthalonitrile resin, improve the dispersion effect and the toughening and reinforcing effect of the graphene oxide in the phthalonitrile resin, and also improve the mechanical properties of the fiber-reinforced phthalonitrile resin-based composite material.

The invention discloses a super heat-resistant resin composition, which is prepared from the following ingredients in parts by weight: 10 to 80 parts of bismaleimide, 5 to 50 parts of phthalonitrile compounds and 10 to 60 parts of epoxy resin. The diphenylsulfone bismaleimide is selected for preparing the resin composition, sulfonyl of the diphenylsulfone bismaleimide contains two-sulfur-oxygen double bonds, and the bond energy of sulfur-oxygen double bonds is very high, so that the molecular structure is very difficult to damage in a high-temperature environment, the high-temperature resistance of the resin composition is greatly improved, and meanwhile, the diphenylsulfone bismaleimide has a plurality of benzene ring structures, so that the high-temperature resistance of the resin composition is greatly improved. The diphenylsulfone bismaleimide is added into the resin composition, so that the rigidity is relatively strong, the thermal stability of the resin composition is improved, the heat resistance of the resin composition is further improved, and the diphenylsulfone bismaleimide is high in symmetry, so that a high-density cross-linked network is easier to form, and the heat resistance of the resin composition is further improved. And the phthalonitrile and phthalonitrile compound with better heat resistance is added into the resin system, so that the heat resistance of the resin composition is further improved.

The invention discloses a self-repairing flexible supercapacitor and a preparation method thereof, and belongs to the technical field of flexible energy storage devices. According to the capacitor, an HAZCN HOF electrode and PDA-PAM self-repairing hydrogel are seamlessly integrated to form an integrated structure, and efficient self-repairing is achieved through hydrogen bonds between the HAZCN HOF and the PDA-PAM hydrogel and the dynamic effect of pi-pi accumulation. According to the HAZCN HOF electrode, a three-dimensional frame structure containing rich hydrogen bonds and redox active sites is formed through dehydration condensation and self-assembly of cyclohexanehexone and 4, 5-diamino phthalonitrile. The PDA-PAM hydrogel electrolyte is copolymerized with acrylamide through dopamine to form an interpenetrating network containing catechol groups, intermolecular hydrogen bonds and pi-pi accumulation. The integrated flexible supercapacitor has high energy storage performance and excellent self-repairing characteristic, and has important application value in the field of wearable electronics.

The present application relates to a kind of preparation of phthalonitrile resin prepolymer catalyzed by sydnones. Specifically, the present application relates to a kind of preparation of modified phthalonitrile resin prepolymer using sydnones as catalyst. Compared with conventional phenolic, amine catalytic system, the curing temperature of prepolymer prepared using sydnones as catalyst is significantly lower, and the thermal performance of the final cured product is comparable to or even better than that of the conventional cured product.

The application provides a resin composition, a prepreg, a laminated board and a preparation method thereof. The resin composition comprises the following components in parts by mass: 40-100 parts of phthalonitrile-terminated polyphenyl ether, 10-40 parts of phenolphthalein-based polyaryletheramine and 10-60 parts of inorganic filler; the structure of the phthalonitrile-terminated polyphenyl ether is shown in formula (I), and the structure of the phenolphthalein-based polyaryletheramine is shown in formula (II); wherein a, m and n are all positive integers, and Y is C1-C3 alkylene or a single bond. The laminated board prepared from the resin composition has high peeling strength, high decomposition temperature, high elastic modulus, good flame retardation, low dielectric coefficient, low water absorption and other excellent comprehensive properties.

ABSTRACT CORROSION-RESISTANT COATING COMPOSITION AND THE METHOD OF PREPARATION THEREOF The present invention relates to a corrosion-resistant coating composition and a method for preparing and applying the same for corrosion protection of metallic substrates under aggressive acidic and high-temperature environments. The boron-integrated phthalonitrile coating exhibits improved resistance to acid-induced degradation while retaining the inherent thermal stability and chemical robustness of phthalonitrile polymers. The invention provides a simple, catalyst-free, and scalable coating system suitable for corrosion protection of substrates exposed to harsh chemical and thermal conditions in industrial applications Fig. 1

The invention discloses a method for rapidly preparing an ultrahigh-temperature ceramic material at low temperature by adopting a polycarbosilane modified binder, and belongs to the technical field of ceramic materials. According to the method, polycarbosilane modified phthalonitrile is adopted as a binding agent, the ceramic material is obtained through curing forming, and low-temperature rapid controllable forming of the ultra-high-temperature ceramic material is achieved. According to the method, hafnium carbide, hafnium boride and silicon boride are used as ceramic powder, polycarbosilane modified phthalonitrile is used as an adhesive, the ceramic powder and the adhesive are bonded into an organic / inorganic hybrid high-temperature-resistant material, the polycarbosilane modified phthalonitrile firstly generates carbon free radicals in the high-temperature use process, one part of the carbon free radicals are oxidized into carbon monoxide to be volatilized, and the other part of the carbon free radicals are oxidized into carbon monoxide to be volatilized. And the other part of carbon free radicals are sintered with hafnium carbide and the like to form carbon-based ultra-high-temperature ceramic before being oxidized, and a continuous and compact carbide ablation layer is constructed, so that the ablation resistance of the material is remarkably improved.

The application relates to the technical field of polyester films, in particular to a long-term heat-oxygen aging resistant polyester film and a preparation method thereof. The polyester film is obtained by blending phthalonitrile and polyester molecules, the thickness of the polyester film is 0.036mm-0.35mm, the longitudinal stretching multiple is 2.5-4.5 times, and the transverse stretching multiple is 2.5-4.5 times. In the application, phthalonitrile and terminal carboxyl groups in the polyester film occur thermal polymerization reaction at a certain temperature, so that polyphthalonitrile is introduced at the end of the polyester molecular chain. The polyphthalonitrile molecular structure contains multiple benzene rings, the conjugate effect of the whole polyester molecular chain is enhanced, the rigidity of the molecular chain is improved, the molecular chain vibration rupture caused by temperature rise can be reduced, the heat-oxygen aging resistance of the polyester film is effectively improved, and the thermal decomposition temperature is increased by 5-20 DEG C compared with that of common polyester films.