Disclosed is an alumina ceramic containing a Ba0.808Al1.71Si2.29O8 phase. The alumina ceramic has excellent light reflection performance and is useful as a light-reflecting material for light-emitting elements. In particular, the alumina ceramic containing a Ba0.808Al1.71Si2.29O8 phase, wherein the intensity ratio between the peak at a diffraction angle (2θ) of 43.3˚ and the peak at a diffraction angle (2θ) of 22.5˚ in the x-ray diffraction is within the range of 0.5-2.5, exhibits excellent light reflection performance. The alumina ceramic has particularly excellent light reflectance of light having a wavelength of 300-400 nm.
A rubber composition for recovering releasability from compression molds. The composition is used to impart releasing properties to a mold surface after a fouling substance resulting from the step of molding a curable resin has been removed from the mold surface. The composition contains, as a base resin, an unvulcanized rubber comprising an ethylene/propylene rubber and a butadiene rubber in a proportion of from 90/10 to 50/50 by parts by weight, and contains a specific release agent. The unvulcanized rubber is an unvulcanized rubber which, after having been vulcanized and cured, has an elongation of 80-800%, a tensile strength of 3-10 MPa, and a rubber hardness (durometer hardness) of A60 to A95, and which has a 90% vulcanization time as measured at a mold temperature of 175° (proper vulcanization point), tc(90), in the range of 50-100 sec or 200-400 sec.
Provided is a wiring board for mounting a light emitting element thereon, wherein wiring conductor (5a, 5b) for driving a light emitting element (1) is formed on a base body (2). The wiring board is characterized in that at least the wiring conductor (5a, 5b) is silver-based conductor at portions to which light emitted from the light emitting element (1) is to be applied, and that a glass layer (8) is formed on surfaces of the silver-based wiring conductors (5a, 5b). A light emitting device wherein the light emitting element is mounted on such wiring board is also provided. The light emitting device is manufactured by a manufacturing method having a step of forming the wiring conductor on the base body for driving the light emitting element so that at least the wiring conductor at the portions to which the light emitted from the light emitting element is to be applied is the silver-based wiring conductor, a step of forming a glass layer on the surface of the silver-based wiring conductor, and a step of mounting the light emitting element on the wiring board.
This invention provides a mold cleaning rubber composition for removing soiling on the surface of a mold produced in a curable resin molding process. An unvulcanized rubber is used as a base material resin. The unvulcanied rubber comprises an ethylene-propylene rubber and a butadiene rubber at a mixing ratio of 90/10 to 50/50 on the basis of parts by weight. After the vulcanization curing of the unvulcanized rubber, the elongation is 80 to 800%, the tensile strength is 3 to 10 MPa, and the rubber hardness (durometer hardness) is A60 to 95. The 90% vulcanization time (proper vulcanization point) tc (90) at a mold temperature of 175°C is 50 to 100 sec or 200 to 400 sec. When the mold cleaning rubber composition is used for cleaning for molds for the production of small-size packages having a large cavity depth, for example, PDIP or SOIC, and molds for the production of small packages, particularly small packages with a small number of pins, preferably, the mold cleaning rubber composition contains a release agent in addition to the unvulcanized rubber having a tc (90) value of 200 to 400 sec.
An acrylic laminate for laser printing having a thickness of 100-200 쎽m which is composed of: (A3) a colored layer made of a crosslinked acrylic resin obtained by crosslinking an acrylic resin composition having a hydroxyl value of 10-100 mg-KOH/g; (B3) a supporting layer made of a crosslinked acrylic resin obtained by crosslinking an acrylic resin composition having a hydroxyl value of 18-40 mg-KOH/g; and (C3) a breaking layer obtained by crosslinking a resin mixture comprising an acrylic resin composition having a hydroxyl value of 20-35 mg-KOH/g and polymer beads.
A retroreflective object having a retroreflective element layer in which a large number of cube corner retroreflective elements of total internal reflection type are disposed. In the back surface of the retroreflective element layer, an optical characteristic adjusting layer is partially provided, and in the back surface of the optical characteristic adjusting layer, an air layer is provided. With the invention, an optical characteristic adjusting layer for adjusting a hue and occupant area ratio can be provided on the back surface of the retroreflective element layer of an existing object in a simple way for easy adjustment, thus enabling a retroreflective object to be manufactured at high productivity and low cost. Therefore, retroreflective objects suitable for reflective plates for traffic related signs such as a traffic sign, a regulation sign, an information sign, and a construction work sign, commercial sings, and reflected-light sensors for visible light, laser beam, or infrared light can be manufactured effectively with use of existing products.
Disclosed is a resin composition for recovering mold releasability, which provides the surface of a mold with releasability after removing dirt on the mold surface during molding of a curable resin molding material. This resin composition contains a melamine resin, while further containing at least one metallic soap-based mold release agent and an organic fatty acid ester-based mold release agent or/and a synthetic wax. This resin composition for recovering mold releasability enables to recover excellent mold releasability which lasts for a long time, and thus enables to continuously mold a sealing article for a long time.
In the retroreflection sheet provided with a specular reflection layer, specular reflection regions provided with the specular reflection layer are insulated electrically from each other by a nonspecular reflection region where the specular reflection layer is not provided, and are arranged in repetition pattern partially while forming an independent region, thus exhibiting radio wave transmissibility.
G06K 19/07 - Record carriers with conductive marks, printed circuits or semiconductor circuit elements, e.g. credit or identity cards with integrated circuit chips
G09F 13/16 - Signs formed of, or incorporating, reflecting elements or surfaces, e.g. warning signs having triangular or other geometrical shape
9.
RESIN COMPOSITION FOR CLEANING MOLDS AND RECOVERING THE RELEASE PROPERTIES OF MOLDS AND METHOD FOR CLEANING MOLDS AND RECOVERING THE RELEASE PROPERTIES OF MOLDS
A resin composition for cleaning molds and recovering the release properties of molds which can remove not only stains of a cavity, a runner and a gate but also stains of an air vent and a parting area of a mold and can impart release properties to the surface of a mold. The composition comprises a melamine resin, at least one metal soap type mold-releasing agent, and preferably mannitol and/or a mold-releasing agent other than metal soaps. The composition is a compression-type one which has both the ability to clean a mold and the ability to recover the release properties of a mold and thus dispenses with the release properties recovering step which was to be conducted after the completion of the mold cleaning step in the prior art.
Provided are a triangular pyramid type cubic corner retroreflection element article, in which a group of triangular pyramid type cubic corner retroreflection elements pairing while sharing one base (A - B) are arranged in the densest packed state on a reference plane determined by three bases, and a method for manufacturing the retroreflection element article. The triangular pyramid type cubic corner retroreflection element article is characterized in that the two included angles of the element pairs, as contained between the common base and the two other sides, are different, and in that the element pair are composed of a first element pair group arranged axially symmetrically with respect to the common base and a second element pair group made congruent with the shape axially symmetric to the segment joining the vertexes of the base of the element pairs.
Provided is a vehicle license plate having a retroreflective surface having a certification mark which can be recognized in a particular direction. The certification mark can be recognized from out of the vehicle advance range.
G09F 7/00 - Signs, name or number plates, letters, numerals, or symbols; Panels or boards
G09F 13/16 - Signs formed of, or incorporating, reflecting elements or surfaces, e.g. warning signs having triangular or other geometrical shape
G09F 19/14 - Advertising or display means not otherwise provided for using special optical effects displaying different signs depending upon the view-point of the observer
A large number of pairs of cube corner retroreflection elements each formed of a groove group in three directions having a substantially V-shaped cross-section to become rotation symmetry by sharing one base forming a retroreflection element are arranged to form a retroreflection article. The retroreflection article is characterized in that the locus of the base of a parallel V-shaped groove group (x groove) in one direction forming that retroreflection element pair group is a line, the loci of the bases of parallel V-shaped groove groups (w1 groove and w2 groove) in the other two directions are continuous bent lines bending at the intersection with the x groove, wherein the loci of the bases of the parallel V-shaped groove groups in the two directions are formed not to intersect each other, and the projection shape of the base forming the retroreflection element is a quadrilateral (A-B-E1-D1 or A-B-E2-D2).
A retroreflection article having excellent wide angle characteristics. To improve incident angle characteristics, observing angle characteristics, and rotation angle characteristics. A multidirectional retroreflection element assembly is formed in which five or seven or more unit elements are formed in a retroreflection article such that two common bases forming the triangular base end surface of a unit element and a common apex where the common bases intersect are shared respectively by the common bases and the common apex of an adjacent retroreflection element.
A process for producing a binder resin for electrostatic charge image developing toner, including the step (1) of mixing in combination with a raw material containing a low-molecular-weight resin and a high-molecular-weight resin and the step (2) of simultaneously therewith and/or thereafter removing a volatile component, characterized in that the raw material of the step (1) further contains a wax. Further, there is provided a process for producing an electrostatic charge image developing toner, characterized in that the above binder resin for toner is further loaded with a colorant.
A retro-reflection sheet comprising a retro-reflection sheet provided with at least a printed image, and an optical element array sheet regularly arranged on at least a specified location with many optical elements having a light transmitting feature, wherein, specifically, a printed image delivering a stereoscopic vision image is installed when the printed image is viewed through a lenticular lens sheet or a convex lens array sheet; and a reflection sheet using a stereoscopic vision image for forgery prevention.
An encapsulated lens type retroreflection sheet comprising at least a large number of micro glass balls (3), a light-transmitting resin holding layer (2) for holding the glass balls (3), a mirror reflection layer (6) for reflecting incident light, at least one focal point formation layer (4) of light-transmitting resin arranged between the glass balls (3) and the mirror reflection layer (6), and the mirror reflection layer (6), wherein an adhesive layer (7) is provided under the mirror reflection layer (6) of the retroreflection sheet to paste the sheet to a substrate (8) through the adhesive layer (7). The retroreflection sheet is characterized in that, when the retroreflection sheet is to be stripped from the substrate (8), delamination takes place between the focal point formation layer (4) and the glass balls (3) and/or the holding layer (2), or delamination takes place between focal point formation layers or between the focal point formation layer (4) and the mirror reflection layer (6), and/or the focal point formation layer (4) is broken and retroreflection performance is damaged or lost.
G02B 5/128 - Reflex reflectors including curved refracting surface transparent spheres being embedded in matrix
B32B 5/16 - Layered products characterised by the non-homogeneity or physical structure of a layer characterised by features of a layer formed of particles, e.g. chips, chopped fibres, powder
B32B 7/02 - Physical, chemical or physicochemical properties
17.
COMPOSITE TRIANGULAR PYRAMID TYPE CUBE-CORNER RETROREFLECTION SHEET AND RETROREFLECTION OBJECT
A composite cube-corner retroreflection element comprising at least two groups of sub retroreflection elements which are divided by three side surfaces mutually crossing at almost right angles by means of 3-directional V-shaped parallel groove groups that mutually cross and have substantially symmetrical sections, and which are disposed in the most densely filled state so as to project toward one side on a common sub plane (SH-SH'), wherein the groups of sub retroreflection elements are disposed on one main retroreflection element that is divided by three side surfaces mutually crossing at almost right angles by means of 3-directional V-shaped parallel groove groups that are disposed on a main plane (S-S'), mutually cross and have substantially symmetrical sections.
A sheet for recovering the releasability of a mold which comprises at least two layers of a base material in a sheet form involving a component (1) having a releasabilty-recovering function or involving a component (1) and a formed member (8) having a releasabilty-recovering function, wherein the above base material in a sheet form has a structure in which a fiber base material (2) in a sheet form having a pore volume percentage of 70 % or more is used as an outermost layer, or a structure in which a fiber base material (2) in a sheet form having a pore volume percentage of 70 % or more is used in an upper side or as an outermost layer and a fiber base material (6) in a sheet form having a pore volume percentage of 40 % or less and/or a heat-resistant film (7) are used in an under side.
patents
