Abstract:
Provided is protective film-forming sheet (2) including: a protective film-forming film (1) having a light transmittance at a wavelength of 1064 nm of 55% or greater and a light transmittance at a wavelength of 550 nm of 20% or less; and a release sheet (21) which is laminated on one or both faces of the protective film-forming film (1). According to this protective film-forming sheet (2), it is possible to form a protective film which allows a workpiece such as a semiconductor wafer to have a modified layer disposed in advance therein by a laser so that the workpiece can be split through the application of force thereon, while preventing grinding marks on the workpiece or a product formed therefrom from being visible to the naked eye.
Abstract:
This invention relates to compositions and methods for increasing the crystallization rate and/or processing speed of polyhydroxyalkanoate (PHA) polymers. PHA polymers are notorious for slow crystallization rates, reducing the practicality for using PHA for consumer products. Compounds that have similar crystal structures to PHA and have a melting point higher than that of the PHA, such as pentaerythritol, as well as compounds that undergo a crystal structure change at or below the melting point of the polymer, such as sulfur or selenium, act as good crystal nucleators for PHA.
Abstract:
A carbon fiber composite material of the present invention includes: cell structures with an elastomer surrounded by a first carbon nanofiber and an interface phase thereof; cell structure assemblies as assemblies of more than one of the cell structures; and tie structures that join the cell structure assemblies to each other. The tie structures are formed by one or more first carbon nanofibers, one or more second carbon nanofibers, and the elastomer interface phase surrounding the one or more first carbon nanofibers and the one or more second carbon nanofibers.
Abstract:
This invention relates to viscoelastic silicone rubber compositions that are the products of the reaction of: (a) a silanol-terminated polyorganosiloxane base; (b) a boron-containing crosslinking agent; and (c) a siloxane bond-forming crosslinking agent. In a viscoelastic silicone rubber composition of the invention some of the crosslinks, the siloxane crosslinks, are permanent and others of the crosslinks, the boron-containing crosslinks, are temporary. Because a fraction of its crosslinks can come apart and then reform, a viscoelastic silicone rubber composition of the invention can relax stress in response to strain and thus adapt to new shapes. The composition has sufficient permanent crosslinks, however, to establish a permanent equilibrium shape to which the composition will eventually return when not subject to any imposed stress. A viscoelastic silicone rubber composition has sufficient temporary crosslinks to give the composition a stiffness that is greater on short timescales than it is on longer timescales.
Abstract:
Bilayer platelet fillers are employed to compensate for a positive coefficient of thermal expansion (CTE) of an embedding polymeric material, or even to provide a composite structure having a negative CTE to eliminate or alleviate thermomechanical stress and/or delamination during thermal cycling. A bilayer platelet includes two joined layers having different CTEs. The CTE mismatch induces bending of the bilayer platelets, thereby causing cavities at temperatures lower than the joining temperature at which the bilayers are joined. The decrease in the volume of the polymeric material and the bilayer platelets at low temperatures is compensated by an accompanying increase in the volume of the cavities so that the composite structure has a temperature independent volume, a low net CTE, or even a negative CTE.
Abstract:
An object of the present invention is to provide: a rubber composition which, when it is applied to a component member (such as a tread) of a tire, exhibits good wear resistance without deteriorating rolling resistance of the tire; a cross-linked rubber composition obtained by cross-linking the rubber composition; and a tire using the rubber composition or the cross-linked rubber composition as a material thereof. Specifically, the present invention provides a rubber composition obtained by blending and kneading a rubber component and hydrated silica together, characterized in that: provided that D represents the average primary particle diameter and LP represents the log differential pore volume at a pore diameter of 30 nm, of the hydrated silica in the rubber composition, D and LP satisfy relationships represented by following formulae (1) and (2). LP>−0.045×D+1.45 (1) D
Abstract:
The present invention provides a phosphor sheet in which the optical properties thereof are not impaired and which exhibits excellent film thickness uniformity even when comprising large-sized phosphor particles in high concentration. In one embodiment, the invention provides a phosphor sheet in which the content of phosphor is 53 weight % or more of the total sheet, and in another embodiment, a phosphor sheet includes at least a silicone resin, a phosphor and silicone fine particles.
Abstract:
Bilayer platelet fillers are employed to compensate for a positive coefficient of thermal expansion (CTE) of an embedding polymeric material, or even to provide a composite structure having a negative CTE to eliminate or alleviate thermomechanical stress and/or delamination during thermal cycling. A bilayer platelet includes two joined layers having different CTEs. The CTE mismatch induces bending of the bilayer platelets, thereby causing cavities at temperatures lower than the joining temperature at which the bilayers are joined. The decrease in the volume of the polymeric material and the bilayer platelets at low temperatures is compensated by an accompanying increase in the volume of the cavities so that the composite structure has a temperature independent volume, a low net CTE, or even a negative CTE.
Abstract:
The method of producing an electrically insulating thermally conductive sheet of the present invention includes the steps of (I) preparing a plurality of sheet materials consisting essentially of a fluororesin containing polytetrafluoroethylene, thermally conductive inorganic particles, and a forming aid; (II) stacking the plurality of sheet materials on one another and rolling the stacked sheet materials together; and (III) removing the forming aid. In the production method of the present invention, the step (I) and the step (II) may be repeated alternately. The sheet material that can be used in the production method of the present invention is, for example, a base sheet obtained by forming a mixture composed of a fluororesin containing polytetrafluoroethylene, thermally conductive inorganic particles, and a forming aid into a sheet, or a laminated sheet obtained by stacking a plurality of base sheets on one another and rolling them together.
Abstract:
Pyrogenically prepared silicon dioxide is compacted to give crusts, in that it is subject to preliminary de-aeration, and is compacted to give crusts, and the crusts are broken and, if appropriate, classified. The tamped bulk density (to DIN EN ISO 787-11) of the silicon dioxide compacted to give crusts is from 185 to 700 g/l. It can be used as filler in rubber mixtures.
Abstract translation:热解制备的二氧化硅被压实以产生结壳,因为它需要进行初步的除气,并且被压实以产生结壳,并且结壳被破坏,并且如果合适的话进行分类。 被压实以产生结壳的二氧化硅的夯实堆密度(符合DIN EN ISO 787-11)为185至700g / l。 它可以用作橡胶混合物中的填料。