14 results about "Polyethylene naphthalate" patented technology

An optically anisotropic polymer thin film includes a crystallizable polymer and an additive configured to interact with the polymer (e.g., via π-π interactions) to facilitate chain alignment and, in some examples, create a higher crystalline content within the polymer thin film. The polymer thin film may be characterized by a bimodal molecular weight distribution where the molecular weight of the additive may be less than approximately 50% of the molecular weight of the crystallizable polymer. Example crystallizable polymers include polyethylene naphthalate, polyethylene terephthalate, polybutylene naphthalate, polybutylene terephthalate, as well as derivatives thereof. Example additives, which may occupy up to approximately 10 wt. % of the polymer thin film, include aromatic ester oligomers, aromatic amide oligomers, and polycyclic aromatic hydrocarbons, for example. The optically anisotropic polymer thin film may be characterized by a refractive index greater than approximately 1.7 and an in-plane birefringence greater than approximately 0.2.

The present application relates to the technical field of polyester material modification, and particularly relates to a high-transparency polyethylene naphthalate material, a preparation method and application, aiming at the problems of fast crystallization rate of the PEN material in the process of processing and molding, easy crystallization of thick products, light transmittance reduction caused by the crystallization, and insufficient material toughness, the present application introduces a diol monomer containing a side group and a flexible chain segment diol monomer into the PEN melt polycondensation process for copolymerization, wherein the diol containing a side group introduces a steric hindrance structure in the molecular chain to destroy the regular packing of the PEN molecular chain, thereby inhibiting the material crystallization behavior and improving the light transmittance of the thick product; the flexible diol introduces a flexible chain segment in the molecular chain to increase the free volume of the molecular chain and improve the molecular chain movement ability, thereby improving the material toughness. Through the above-mentioned synergistic copolymerization modification method, the crystallization tendency of the PEN material can be effectively reduced, the obtained PEN thick product has excellent light transmittance and toughness at the same time, and is suitable for the preparation of high-performance transparent polyester products.

The application discloses a kind of optical adhesive protective group film, comprising: core layer, it is arranged between first surface layer and second surface layer;Core layer includes first polyester;First surface layer and second surface layer include the mass ratio of (45~50) and functional master batch of (50~55) first polyester, and functional master batch includes polyethylene naphthalate, second polyester and modified barium sulfate.By mixing the dispersibility of functional master batch and first polyester is improved, and then the haze and light transmittance of base film are optimized;By polyethylene naphthalate preparation functional master batch, the heat resistance and stability of base film are optimized, and its transmittance is improved and haze is reduced.

A foamed polymer composition includes a matrix polymer component, and from 0.01 wt % to 2 wt %, based on the weight of the polymer composition, of a nanostructured fluoropolymer, a nanostructured fluoropolymer encapsulated by an encapsulating polymer, or a combination thereof. The matrix polymer component includes polybutylene terephthalate (PBT), polyetherimide (PEI), polyethylene terephthalate (PET), polycarbonate (PC), poly(p-phenylene oxide) (PPO), polystyrene (PS), polyphenylene sulfide (PPS), polypropylene (PP), polyamide (PA), polytrimethylene terephthalate (PTT), polyethylene naphthalate (PEN), polybutylene naphthalate (PBN), copolymers thereof, or a combination thereof. Methods for forming foamed polymer compositions, including core-back molding methods and extrusion foaming methods, are also described.

A multilayer optical film includes a plurality of alternating polymeric first and second layers numbering 10 to 120 in total. Each of the first and second layers having an average thickness of less than about 500 nm. The first layers include polyethylene naphthalate, and the second layers include a copolyester comprising at least one of cyclohexane dicarboxylic acid groups, adipic acid groups, or tetramethyl cyclobutanediol groups, such that for substantially normally incident light and for at least one polarization state, the multilayer optical film has an average optical reflectance of at least about 70% in a wavelength range at least about 200 nm wide.

The invention relates to a modified polycarbonate master batch, a composite polycarbonate material as well as a preparation method and application thereof. The modified polycarbonate master batch is prepared from the following raw materials in parts by weight: 70 to 95 parts of polycarbonate, 5 to 25 parts of polyethylene naphthalate, 0.1 to 2 parts of epoxy resin coupling agent and 0.5 to 3 parts of compatilizer A. The composite polycarbonate material is prepared from the following components in parts by weight: 50 to 90 parts of modified polycarbonate master batch, 5 to 35 parts of polyetherimide and 0.2 to 2 parts of compatilizer B. Polyethylene naphthalate is used for modifying polycarbonate, the high-temperature-resistant modified polycarbonate master batch is prepared, then the modified polycarbonate master batch and polyetherimide are blended, and the prepared composite polycarbonate material has excellent high-temperature resistance and mechanical performance.

The invention relates to the technical field of photoelectric materials and devices, in particular to a flexible perovskite photovoltaic module barrier film and a preparation method thereof. The flexible perovskite photovoltaic module barrier film comprises a substrate layer, a first barrier layer, a self-repairing layer and a second barrier layer, the substrate layer is any one of a polyethylene glycol terephthalate film and a polyethylene naphthalate film, and the thickness of the substrate layer is 100-150 microns; the first barrier layer comprises any one of a SiO2 thin film and an Al2O3 thin film, and the thickness of the first barrier layer is 20-50 nm; the self-repairing layer is prepared from hydroxyethyl methylacrylate, dodecafluoroheptyl methacrylate, a cross-linking agent and a photoinitiator, the cross-linking agent comprises any one of a disulfide bond-containing cross-linking agent and a dihydrazide cross-linking agent, and the thickness of the cross-linking agent is 2-5 microns. And the second barrier layer comprises any one of an Al2O3 film, a fluorosilicone resin film, a thermoplastic polyolefin film and an organic-inorganic hybrid layer. And the stability and the damp-heat cycle resistance of the flexible perovskite photovoltaic module can be improved.

An optical polyester film, the polyester film comprising a core layer and at least one surface layer, the core layer and surface layer being prepared by melt extrusion and biaxial stretching with a co-extrusion die, the core layer comprising 30wt%-90wt% of a conventional polyester and 10wt%-70wt% of semi-crystalline polyethylene naphthalate; the surface layer comprising 5wt%-55wt% of a modified polyester, 35wt%-94.9wt% of a conventional polyester and 0.1wt%-10wt% of a functional masterbatch; the functional masterbatch containing slip particles; the modified polyester being obtained by melt extrusion of 30wt%-90wt% of a conventional polyester and 10wt%-70wt% of a modified methacrylic resin, the modified polyester having an intrinsic viscosity of 0.70dL / g-0.85dL / g. The optical polyester film has the characteristics of low exudation, excellent barrier property and good optical performance.

A power transmission belt comprising a body (102) made of a sizing material having a main elastomer, a tooth portion (104), and a belt back (107) and a plurality of longitudinal cords (103) embedded in the belt body wherein: the main elastomer constitutes at least 70% by weight of all elastomer materials of the body; the main elastomer is an ethylene-alpha-olefin copolymer; the body comprises at least 12% by weight of fibers; the fiber is selected from the group consisting of glass, aramid fiber, polyester, carbon fiber, polybenzobisoxazole (PBO), polyamide, polyketone (POK), polyether-ether-ketone (PEEK), polyvinyl alcohol (PVA), liquid crystal fiber (LPC), polyethylene naphthalate (PEN) and aliphatic polyamide; the size of the fibers is between 1mm and 6mm; the teeth are coated with a coating material selected from the group consisting of woven fabrics, knitted fabrics and non-woven fabrics; the coating material is treated by adopting a polymer containing nitrile groups; the cladding material is coated with a second treatment layer (109) comprising an elastomer and an antifriction material.

The invention provides a high-viscosity low-adhesive-residue electronic component fixing adhesive tape, the adhesive tape comprises an adhesive layer, a buffer layer and a base material layer, the buffer layer adopts a gradient component gradual change structure, the base material layer adopts a blend of polyethylene glycol terephthalate and polyethylene naphthalate in a mass ratio of 7: 3, and the adhesive layer adopts a high-viscosity low-adhesive-residue electronic component fixing adhesive tape. And a bionic micro-nano structure is arranged on one side, connected with the buffer layer, of the surface of the substrate. Through three-layer structural design, the pressure-sensitive adhesive layer provides high-viscosity and low-residue core performance, the gradient transition layer eliminates interface stress, the bionic base material layer improves structural stability and interface bonding force, and the electronic element fixing adhesive tape which is high in viscosity, low in residue, wide in temperature range stability, simple in preparation process and controllable in cost is developed.

The application discloses a perovskite ink suitable for meniscus coating, a preparation method and application thereof, the perovskite ink comprises a perovskite material, a polymer additive and a solvent; the polymer additive is selected from one or more of polymethyl methacrylate, polydimethylsiloxane, polyethylene naphthalate, polyethylene terephthalate, polyimide, polycarbonate, polyurethane, natural rubber or silicone polymer. The application adopts a polymer additive to regulate the shape of perovskite precursor micelles in a solution, and prepares perovskite precursor ink. The ink shows uniform film morphology and single crystal orientation after blade coating. The high-quality perovskite film prepared by using the perovskite ink improves the performance of a perovskite battery.

The present application provides a polyethylene naphthalate resin composition which can be used for optical members such as optical films. The polyethylene naphthalate resin composition for optical members of the present application contains (A) polyethylene naphthalate and (B) a phosphorus compound or a salt thereof represented by the following formula (I) or (II) (in the formula, R1 represents an alkyl group having 1 to 12 carbon atoms, an aryl group having 6 to 12 carbon atoms, or a benzyl group, R2 and R3 represent an alkyl group having 1 to 12 carbon atoms, an aryl group having 6 to 12 carbon atoms, a benzyl group, a glycol group, or a hydrogen atom, and R1 and R2 can be bonded to form a ring).

The invention belongs to the technical field of optical thin film manufacturing, and discloses a production process of a multi-layer co-extrusion reflective polarizing film. The process comprises the following steps: respectively preparing a supporting layer raw material containing polyethylene terephthalate, an antioxidant and a sticky plastic, and a polarized functional layer raw material containing polyethylene naphthalate, polymethyl methacrylate, a nano metal oxide and a sticky plastic; co-extruding to form a 330-layer alternately laminated film blank with the supporting layer positioned on the surface layer; and carrying out transverse stretching at 80-100 DEG C, three-stage gradient heat setting and plasma treatment. According to the preparation method, the problems of poor interlayer bonding force and high-temperature deformation are solved through adhesive interface compatibilization, nanoparticle scattering and gradient heat setting stress release; the polarization degree of the obtained polarizing film is larger than 75%, the tensile strength is larger than 80 MPa, the 150 DEG C thermal shrinkage rate is smaller than 1%, the thickness deviation is + / -3 microns, the 150 DEG C thermal shrinkage rate is smaller than 1%, and the polarizing film has excellent optical performance and dimensional stability.

This invention provides cones that are easy to pull out even when stacked and left undisturbed in direct sunlight, and that are also easy to mold and process. [Solution] A cone having a conical portion, wherein the conical portion contains polyethylene terephthalate and polyethylene naphthalate, and the mass ratio of polyethylene terephthalate to polyethylene naphthalate is 85:15 to 15:85.