39 results about "Glass transition point" patented technology

A display device that includes a display panel that has a plurality of organic EL elements, and a drive unit that is provided to be in contact with the display panel and drives the display panel, in which each organic EL element includes an organic layer that contains a high glass transition temperature material having a glass transition point of 120° C. or higher, is provided.

A composite material comprises a dispersion material having a thermal conductivity of 100 W / K ⋅ m or above, and an insulator interposed between the dispersion materials. For example, the dispersion material is an aluminum-based metal powder. For example, the insulator is an oxide or a resin having a glass transition point equal to or lower than the melting point of the dispersion material. For example, the electrical conductivity of the composite material is 0.5 × 106 S / m or below.

To suppress cracks in metal bumps. [Solution] The semiconductor device of the embodiment comprises a mounting substrate, a package substrate provided on the side of the mounting substrate facing the main surface on the side intersecting the main surface of the mounting substrate, a metal bump provided between the main surface of the mounting substrate and the package substrate, a first underfill provided on the side of the metal bump in a second direction along the main surface, and a second underfill provided between the metal bump and the first underfill, wherein the first underfill and the second underfill have different glass transition points.

The present invention provides a polytetrafluoroethylene sealing material and a preparation method thereof, and belongs to the technical field of sealing materials, the polytetrafluoroethylene sealing material comprises the following components by weight: 100 parts of polytetrafluoroethylene and 10-40 parts of a filler, and the filler comprises boron nitride and a polyvinylidene fluoride coating layer coating the surface of boron nitride. The boron nitride filler with the surface coated with polyvinylidene fluoride is introduced into a polytetrafluoroethylene matrix, so that the comprehensive performance of the sealing material is remarkably improved. The wear resistance is greatly enhanced by boron nitride through a pinning effect, and a constructed high-thermal-conductivity network can effectively export friction heat, so that the interface temperature is lower than the glass transition point of polytetrafluoroethylene to maintain rigidity; meanwhile, the polyvinylidene fluoride coating layer realizes covalent crosslinking through dehydrofluorination reaction with polytetrafluoroethylene, so that the mechanical strength and the interface bonding force of the material are remarkably improved.

To provide a protective sheet having a protective layer which has low tackiness at room temperature and can relatively strongly adhere to a surface to be protected.SOLUTION: The protective sheet includes a protective layer for protecting a protection target surface of a substrate when an electronic component device is manufactured, and the protective layer contains a polymer having a glass transition point of 10 °C or more and 50 °C or less.SELECTED DRAWING: Figure 1

The present invention provides a magnetic one-component toner that has low-temperature fixing properties and excellent heat resistance and heat stress resistance over long periods, as well as an image forming apparatus using the same. [Solution] The magnetic one-component toner comprises toner matrix particles containing at least a binder resin and magnetic powder, and an external additive attached to the surface of the toner matrix particles. The binder resin comprises an amorphous polyester resin and a crystalline polyester resin containing an aliphatic diol with 3 to 9 carbon atoms, and the amount of crystalline polyester resin added is 5% by mass or less relative to the amorphous polyester resin. When the glass transition point at the first heating, measured by differential scanning calorimeter, is Tg1, and the glass transition point measured when the temperature is raised again after cooling after measuring Tg1 is Tg2, Tg(45) and Tg(25), which are Tg1 measured after being left at 45°C and 25°C for 100 hours, are 0

A lubricating film-coated steel sheet has at least one surface on which an organic resin film is formed. The organic resin film contains an acrylic resin having a glass transition point (Tg) of 100° C. or higher and an acid value ratio R=acid value (mg-KOH / g) / Tg (° C.) of 1.50 or more, and 5 mass % or more of a polyolefin wax having a melting point of 100° C. or higher and 145° C. or lower and an average particle diameter of 3.0 μm or less, and is formed on a surface of a steel sheet at a coating weight, W, of 0.3 g / m2 or more and 2.5 g / m2 or less per surface.

This invention relates to a method for modeling the curing kinetics of polymer resins, specifically providing a method for fitting the curing kinetics of polymer resins based on a segmented model. The method employs a three-stage segmented kinetic model. In the first stage, an external catalytic model is introduced to quantify the inductive acceleration effect of the co-catalyst in the early stages of the reaction. In the second stage, the Kamal-Sourour model is used to ensure the fitting accuracy of the chemical control region. In the third stage, a diffusion correction term based on thermodynamic evolution is introduced to quantify the diffusion resistance caused by entering the glassy state in the later stages, significantly improving the fitting accuracy at the end of curing. More importantly, this invention creatively proposes a method based on the activation energy minimum point. α tr and dynamic glass transition point α vit The segmentation points effectively couple the external catalytic model, the Kamal-Sourour model, and the dynamic diffusion model, effectively solving the problem of inaccurate fitting of the full-cycle kinetics, improving the fitting accuracy, and providing data support for the fine-tuning of the curing process.

In an ignition unit for a propellant charge (8), comprising an elongated ignition transfer charge (2) made of propellant powder, through which a free ignition channel (5) runs in its longitudinal direction, and a combustible support tube (3) that surrounds the ignition transfer charge (2) perpendicular to the free ignition channel (5), the ignition transfer charge (2) is formed from a first material which has a glass transition point below -40°C in an observed temperature range of -51°C to +71°C, and the support tube (3) is formed from a second material which does not have a glass transition point below +72°C.

A rubber composition for a tire tread is disclosed, which provides a tire excellent in wet grip performance at low temperatures and wet grip performance at high temperatures. The rubber composition for a tire tread includes, per 100 parts by mass of diene-based rubbers including (a) 25 to 65 parts by mass of a modified styrene butadiene rubber having a glass transition point of −30° C. or more and (b) 25 to 65 parts by mass of a modified styrene butadiene rubber having a glass transition point of −50° C. or less: 80 to 140 parts by mass of silica; 15 to 50 parts by mass of a thermoplastic resin having a softening point of 40° C. or more; and 5 to 15 parts by mass of an oil.

Provided is a protective sheet comprising a protective layer for protecting a surface to be protected of a substrate when manufacturing an electronic component device. The protective layer includes a polymer having a glass transition point of 10°C or more and 50°C or less.

To provide a resin composition for an optical connection component capable of achieving both suppression of loss fluctuation due to temperature rise and excellent PC connection.SOLUTION: The resin composition for an optical connecting part of the present invention contains a base resin and an inorganic filler, wherein the base resin has a glass transition point of 85 °C or more, the mass of a residue obtained by heating the resin composition for an optical connecting part at 700 °C is 68.0% or more and 74.4% or less based on the mass of the resin composition for an optical connecting part, and the resin composition for an optical connecting part has a Rockwell hardness of 97.1 or more and 106.8 or less.SELECTED DRAWING: Figure 1

A rubber composition comprising, per 100 parts by mass of a rubber component containing styrene-butadiene rubber whose glass transition point is −70° C. to −20° C. and butadiene rubber, 0.1 to 10 parts by mass of a compound represented by the following general formula (1):wherein at least one of R1 to R5 is an —OH group or an —OCH3 group and others are each an —H group or a hydrocarbon group having 1 to 20 carbon atoms, A is an unsaturated bond or an alkylene group having 1 to 20 carbon atoms and optionally having an —H group, a —CH3 group, an —NH2 group, an —O— group, or an —OH group, n is an integer of 0 to 10, and B is a —COOH group, an —OH group, or an ═O group and optionally forms a ring structure with adjacent R1 or R5.

A bending meshing type gear device includes a wave generator, a bending gear that is bent and deformed by the wave generator, and a meshing gear that meshes with the bending gear, in which the meshing gear is formed of a first resin having a glass transition point lower than about 140° C., the bending gear is formed of a first high thermal conductivity material having higher thermal conductivity than the first resin, and the wave generator is formed of a second high thermal conductivity material having higher thermal conductivity than the first high thermal conductivity material.

An acrylic rubber composition comprising 5 to 15 parts by weight of a plasticizer having a solubility parameter SP value (by Small's method) of 8.5 to 10.5 based on 100 parts by weight of super cold resistant grade acrylic rubber having a glass transition point Tg of −42° C. or less, wherein the acrylic rubber composition can give a vulcanizate with the TR10 value, which is an index of cold resistance, of −42° C. or less both initially and after oil dipping. In the acrylic rubber composition, first, the ratio of an acrylate monomer that constitutes acrylic rubber is adjusted, thereby the low temperature characteristics can be maintained even in an oil contact environment. This intentionally reduces the oil resistance of the vulcanized rubber molded product, thereby increasing the amount of oil swelling into the vulcanized rubber molded product and improving the flexibility in a low temperature environment.

This invention provides a method for determining the nucleation time of a glass-ceramic, comprising: testing the differential thermal analysis (DSC) curve of a precursor glass to obtain the glass transition point Tg and the crystallization peak position Pc; selecting a nucleation temperature Tn and a crystallization temperature Tc, wherein Tn ranges from Tg to Tg+150℃ and Tc ranges from Pc-60℃ to Pc+60℃; performing DSC tests on the precursor glass at different times under heat treatment at Tc, and setting the time corresponding to the complete disappearance of the crystallization peak on the DSC curve as the crystallization time tc; preparing the glass-ceramic, wherein the precursor glass is first heated to Tn and held at that temperature, and then heated to Tc and held at that temperature for tc; testing the DSC curve of the glass-ceramic obtained in step 4, and calculating the integral area of ​​the corresponding endothermic peak on the DSC curve; gradually extending the nucleation time, repeating steps 4-5, and when the change in the integral area of ​​the endothermic peak on the DSC curve is less than a preset value, the corresponding nucleation time is the optimal nucleation time tn. This invention can quickly and accurately determine the shortest time required to reach the nucleation limit.

Magnetic one-component toner includes a toner base particle containing at least a binder resin and a magnetic powder and an external additive attached to its surface. The binder resin contains an amorphous polyester resin and a crystalline polyester resin containing an aliphatic diol with a carbon number of 3 or more but 9 or less. The amount of crystalline polyester resin added is 5 mass % or less relative to the amorphous polyester resin. Let Tg1 be the glass transition point measured using a differential scanning calorimeter when temperature is first raised and let Tg2 be the glass transition point measured when, after the Tg1 measurement, temperature is lowered and raised again, then Tg(45) and Tg(25), which are the values of Tg1 measured after standing still at 45° C. and 25° C., respectively, for 100 hours, satisfy 0<Tg2−Tg(45)<5 and 4<Tg2−Tg(25)<10.

Provided are: a polyarylene sulfide (PAS) resin pipe having all of processability, hot water resistance, and water pressure resistance; and a manufacturing method therefor. More specifically, provided are: a PAS resin pipe having a non-bent part and a bent part and obtained by bending a single-layer tubular molded article composed of a PAS resin composition at a temperature that is equal to or higher than the glass transition point of a PAS resin, wherein the tensile elongation at break of the PAS resin composition is at least 70%, and the minimum outer diameter of the bent part is at least 70% of the average outer diameter of the non-bent part; a composite; and manufacturing methods therefor.

Provided is a glass containing a crystalline phase, the glass including at least one crystalline phase selected from the group consisting of cristobalite, lithium disilicate, and petalite, in which a value of E / ρ, which is a ratio of Young's modulus E to specific gravity ρ, is 35 or more, and a glass transition point is 680° C. or higher.

A semiconductor device includes a semiconductor element having main electrodes on opposite faces opposite in a predetermined direction, a substrate, and a sealing body containing resin. The substrate has an insulating base member, a front-face metal body on a front face of the insulating base member and a back-face metal body on a back face of the insulating base member, the front-face metal body being connected to at least one of the main electrodes of the semiconductor element. The insulating base member and the sealing body satisfy a relationship of Tgs≥Tgi and a relationship of αi≥αs, in which Tgi is a glass transition point of the insulating base member, αi is a linear expansion coefficient of the insulating base member, Tgs is a glass transition point of the sealing body, and αs is a linear expansion coefficient of the sealing body.

Provided is a method for easily disassembling a structure formed by adhesion without leaving an adhesive on a surface of an adherend and without requiring a large load to be applied when peeling an adhesive surface. Provided is a method for disassembling an adhesive structure having a first adherend, a second adherend, and an adhesive layer disposed between the first adherend and the second adherend, the method including: a peeling process of peeling the adhesive layer from at least one of the first adherend and the second adherend by heating the adhesive structure at a temperature of 60°C to 120°C, the adherend being composed of at least one material selected from the group consisting of a heat-treated aluminum alloy, titanium, and a magnesium alloy, and the adhesive layer including a cured product of an adhesive having a normal-temperature curing property and having a glass transition point of 60°C to 120°C.

Provided is a cyclic olefin copolymer composition comprising a cyclic olefin copolymer (A) having a glass transition point (Tg) of more than 100.0°C and a cyclic olefin copolymer (B) having a glass transition point (Tg) of 100.0°C or less. When the total amount of the cyclic olefin copolymer (A) and the cyclic olefin copolymer (B) is taken to be 100 mass parts, the content of the cyclic olefin copolymer (A) is from more than 95.0 mass parts to 99.9 mass parts and the content of the cyclic olefin copolymer (B) is from 0.1 mass part to less than 5.0 mass parts.

A rubber composition for a tire tread is disclosed, which provides a tire excellent in wet grip performance at low temperatures and wet grip performance at high temperatures. The rubber composition for a tire tread includes, per 100 parts by mass of diene-based rubbers including (a) 30 to 50 parts by mass of a styrene butadiene rubber having a glass transition point of −35° C. or more, (b) 20 to 40 parts by mass of a styrene butadiene rubber having a glass transition point of −45° C. or more and less than −35° C., and (c) 10 to 30 parts by mass of a styrene butadiene rubber having a glass transition point of −65° C. or more and less than −45° C.: 80 to 140 parts by mass of silica; and 15 to 50 parts by mass of a thermoplastic resin having a softening point of 40° C. or more.

Provided is a laminated polyester film and a protective film which inhibit an increase in haze even after a heat drying step and are excellent in an oligomer blocking property, an antistatic property, and adhesion to a substrate. The laminated polyester film has a polyester film substrate and a resin layer. The resin layer is a layer obtained by curing a composition for forming a resin layer containing: a polyester-based resin having a glass transition point temperature of 40°C or higher; a crosslinking agent; and a polythiophene-based conductive polymer.

In a method for manufacturing a glass plate that includes chamfering processing for chamfering an edge surface of a glass plate, the chamfering processing includes a step of forming a chamfered surface by irradiating the edge surface of the glass plate with a laser beam, and a step of heating the glass plate before the chamfered surface is formed. When a temperature of the glass blank at which the glass blank is heated is Tp [° C.], a glass transition point of the glass blank is Tg [° C.], and an average coefficient of linear thermal expansion of the glass blank is α [1 / ° C.], (Tg−Tp)≤−5.67×107·α+840 is satisfied.

A glass substrate for a magnetic disk has a disk shape. The glass substrate has a diameter D of 85 mm or more and 100 mm or less, and a thickness T of 0.3 mm or more and 0.5 mm or less. Regarding a Young's modulus E and the thickness T of the glass substrate, a value of E·T3 is 3 to 18 (GPa·mm3). A material of the substrate has a Q-value of 1500 or less under conditions of 3000 Hz and room temperature. The glass of the glass substrate has a glass transition point of 680° C. or higher.

A rubber composition comprising, per 100 parts by mass of a rubber component containing at least one of natural rubber and isoprene rubber and further containing styrene-butadiene rubber whose glass transition point is −70° C. to −20° C., 0.1 to 10 parts by mass of a compound represented by formula (1):wherein at least one of R1 to R5 is an —OH group or an —OCH3 group and others are each an —H group or a hydrocarbon group having 1 to 20 carbon atoms, A is an unsaturated bond or an alkylene group having 1 to 20 carbon atoms and optionally having an —H group, a —CH3 group, an —NH2 group, an —O— group, or an —OH group, n is an integer of 0 to 10, and B is a —COOH group, an —OH group, or an ═O group and optionally forms a ring structure with adjacent R1 or R5.

The present invention enables separation of a sample solution and PCR by suppressing generation of air bubbles with a simple configuration that does not require pressurization. A digital PCR microdevice has: a base material having a plurality of recesses; a spacer provided between the base material and a cover and disposed around the plurality of recesses; and a chamber formed by the spacer. A PCR method according to the present disclosure includes: introducing a sample solution into the plurality of recesses; introducing a liquid photocurable resin having a glass transition point of −120°C to 0°C into the chamber to cover the plurality of recesses, thereby separating the plurality of recesses; irradiating the photocurable resin with light to gelatinize the photocurable resin; and adjusting the temperature of the digital PCR microdevice to perform PCR. The Young's modulus of the cover is 0.4 MPa to 4 Gpa, the distance between the cover and the base material is variable during temperature control, and the area of the cover on the chamber is 100 mm2 to 2500 mm2.

Provided are a heat transfer suppression sheet having an excellent heat transfer prevention effect and excellent retainability of inorganic particles and shape retainability at a high temperature, and a battery pack in which the heat transfer suppression sheet is interposed between battery cells. The heat transfer suppression sheet (10) includes inorganic particles (20), first inorganic fibers (30), and second inorganic fibers (31). The first inorganic fibers (30) are amorphous fibers. The second inorganic fibers (31) contain at least one kind selected from amorphous fibers having a glass transition point higher than that of the first inorganic fibers (30) and crystalline fibers.

This invention relates to a chip bonding film, its preparation method, and its application. The chip bonding film comprises, from top to bottom, a first release film, a chip bonding film layer, a pressure-sensitive adhesive layer, and a chip cutting film, arranged layer by layer. The chip bonding film layer comprises, by weight, the following components: epoxy resin, 5-30 parts; phenolic resin, 5-30 parts; and filler, 5-20 parts. The pressure-sensitive adhesive layer comprises, by weight, the following components: acrylic resin, 100 parts; accelerator, 0.1-1 parts; and coupling agent, 1-5 parts. The advantage of this invention is that it uses epoxy resin and phenolic resin to construct the resin matrix. A suitable matrix combined with filler can disperse the filler in a short time, forming a highly stable colloid with a particle size of less than 1 μm. This improves the linear expansion coefficient of the film after the glass transition point (Tg), enhances the adhesion of the film, and avoids cutting defects and weak bonding points caused by filler agglomeration.