摘要:
An oriented polyimide film with a high Young's modulus, satisfactory moist heat resistance and low moisture absorptivity, and a process for its production. The polyimide film is composed mainly of a pyromellitic acid component, with a p-phenylenediamine component at between 30 mole percent and 99 mole percent and a diamine component represented by the structural unit of the following formula (II) at between 1 mole percent and 70 mole percent: (wherein ArIIa and ArIIb are each independently a C6-20 aromatic group optionally having an non-reactive substituent, and X in structural unit (II) consists of at least one group selected from among —O—, —O—ArIIc—O—, —SO2— and —O—ArIId—O—ArIIe—O—), and the polyimide film is characterized by having two perpendicular directions in which the in-plane Young's modulus is 3 GPa or greater, and having a moisture absorptivity of no greater than 3.3 wt % at 72% RH, 25° C.
摘要:
There are provided an adhesive sheet, exhibiting a specific peel strength and shear peel strength and being composed of a base material (A) comprising a fully aromatic polyimide film having a glass transition temperature of 200° C. or above and a thermal adhesive layer (C) comprising a fully aromatic polyamide having a glass transition temperature of 200-500° C., as well as a laminate composed of the sheet and a process for its production. Also provided is a method of release after treatment of the laminate composed of the adhesive sheet, to obtain a laminate having the target to-be-treated layer.
摘要:
A laminate which is advantageously used as an insulating layer for electronic package application and as an adhesive film for fixing a semiconductor wafer for semiconductor device application, laminates comprising the same and a process for manufacturing the above laminate. The laminate (I) comprises a base layer (A) and an adhesive layer (B) formed on one side or both sides of the layer A, the layer A is a film made of (A-1) a specific wholly aromatic polyimide (PIA-1) or (A-2) a specific wholly aromatic polyamide (PAA-2); and the layer B comprises (B-1) a specific wholly aromatic polyimide (PIB-1), (B-2) a specific wholly aromatic polyamide (PAB-2), or (B-3) a specific resin composition (RCB-3) comprising a wholly aromatic polyimide (PIB-3) and a specific wholly aromatic polyamide (PAB-3), laminates comprising the same and a process for manufacturing the above laminate.
摘要:
A polymetaphenylene isophthalamide-based polymer porous film having a satisfactory porous structure that exhibits excellent gas permeability and heat resistance. It is produced by a process which comprises casting a dope of the polymetaphenylene isophthalamide-based polymer and coagulating it in a coagulating bath. The porous film may also contain inorganic whiskers, and a composite porous film may be formed in combination with a separate thermoplastic polymer film.
摘要:
A process for the preparation of high-performance grade carbon fibers, which comprises attaching a fine powder of at least one member selected from oxides and carbides of silicon, aluminum, titanium, and boron to a precursor fiber bundle of as spun pitch fibers, subjecting the fiber bundle to an infusibilization treatment, and subjecting the fiber bundle to a carbonization treatment.
摘要:
An objective of the present invention is to provide a rare earth metal-based permanent magnet with improved adhesion properties. A rare earth metal-based permanent magnet of the present invention as a means for achieving the objective has a laminated plating film, and is characterized in that the plating film comprises as an outermost surface layer a SnCu alloy plating film having a film thickness in a range from 0.1 μm to 2 μm, the composition of the SnCu alloy plating film is 35 mass % or more but less than 55 mass % of Sn and the rest being Cu, and a base plating film having two or more layers including at least a Ni plating film and a Cu plating film which are formed as the lower layer under the SnCu alloy plating film, and among the base plating film, the Ni plating film is located just below the SnCu alloy plating film. A joined structure fabricated using the rare earth metal-based permanent magnet of the present invention exhibits favorable initial adhesion strength when combined with a silicone-based adhesive, and is less deteriorated in adhesion strength even after a moisture resistance test.
摘要:
The invention relates to the use of a precipitated silica, pretreated by at least one organosilane hydrophobic compound or one hydrophobic silicone oil, as a reinforcing filler for silicone elastomer, the pretreated silica being incorporated in the silicone elastomer by cold mixing and having the following features: —a BET specific surface ranging from 50 to 450 m2/g, —a water wettability lower than 80, —a sulfur content lower than 0.1% by weight. The invention is directed to the curable silicone elastomer composition thus obtained.
摘要:
A dry test strip for measuring calcium is comprising a support, a reagent layer provided on the support, and a reagent holding layer provided on the reagent layer, and containing, as reagents, o-cresolphthalene complexone, a magnesium selective masking agent, and a pH buffer for adjusting the pH of the environment for reaction of the o-cresolphthalene complexone with calcium to 10.0-11.0, wherein such reagents are present in either the reagent layer or the reagent holding layer or the both layers.
摘要:
A light emitter emits light with a plurality of wavelengths towards a test object held in a spectrophotometer tool. A light receiver receives the light passing through the test object. A detector detects absorbances of wavelength components from the light received by the receiver. An optical path length calculator compares, in the absorbances of the wavelength components detected, a wavelength component absorbance of light absorbed by a pigment that absorbs light with a wavelength other than a wavelength of light absorbed by an analyte in the test object and a predetermined value of the wavelength component absorbance to calculate an optical path length passing through the test object. A corrector corrects the wavelength component absorbance detected excluding the wavelength of the light absorbed by the pigment using the optical path length calculated by the optical path length calculator to calculate a corrected wavelength component absorbance in a reference optical length.
摘要:
A dry test strip for measuring creatinine comprises: a support; a reagent layer that is disposed on the support; a reagent holding layer that is disposed on the reagent layer; and a connection layer that is composed of an adhesive which adhesively bonds the reagent layer to the reagent holding layer and is formed in spot form, wherein the reagent layer contains creatininase and 4-aminoantipyrine; the reagent holding layer contains creatinase, sarcosine oxidase, peroxidase, and N-ethyl-N-(2-hydroxy-3-sulfopropyl)-3,5-dimethoxyaniline; and the connection layer delays arrival of a liquid sample spot-deposited on the reagent holding layer at the reagent layer.