摘要:
A thermal recording material comprising (1) a synthetic paper support having on one side thereof (2) a thermal color forming layer, the support comprising (B) a biaxially stretched resin film as a base layer having (A) a uniaxially stretched thermoplastic resin film containing from 1 to 8% by weight calcium carbonate powder as a calcium carbon powder containing layer on one side thereof, and (C) a uniaxially stretched thermoplastic resin film containing from 15 to 55% by weight inorganic fine powder as a back surface layer on the other side thereof, the thermal color forming layer being provided on the calcium carbon powder containing layer (A), in which (i) the support has an opacity of not more than 45% as measured according to JIS P-8138, (ii) the calcium carbon powder containing layer (A) has a Bekk's index of from 1,000 to 3,500 seconds and a center-line average roughness (Ra) of not more than 0.5 .mu.m, (iii) the back surface layer (C) has a Bekk's index of from 100 to 900 seconds and a center-line average roughness (Ra) of from 0.6 to 1 .mu.m, and (iv) the support has a density of from 0.91 to 1.1 g/cm.sup.3 as measured according to JIS P-8118. The thermal recording material has improved image definition, including dot reproducibility, is suitable for diazo copying and high-speed printing, and can be written on with a pencil.
摘要:
An illuminated sign board which comprises a film having printing, a frame, and a light source is described. The film is a semi-transparent film made of a stretched resin film containing a finely divided powder of a white inorganic material. The semi-transparent film satisfies the following requirements (1) to (4): (1) an opacity of from 40% to 70%; (2) a whiteness of from 80% to 100%; (3) a total light beam average reflectance of from 30 to 60%; and (4) a total light beam average transmittance of from 30% to 70%.
摘要:
A method for manufacturing a bearing ring member for a rolling bearing unit is provided. In this method, a blank hollow cylindrical portion having a smaller diameter than a hollow cylindrical portion is formed, the blank hollow cylindrical portion is radially expanded to form the hollow cylindrical portion, and a raceway surface is formed on either inner or outer circumferential surface of the hollow cylindrical portion along a circumferential direction thereof.
摘要:
Provided is a manufacturing method of an outer ring (3) of a back-to-back arrangement double-row angular ball bearing from a raw material (10) comprising a upsetting (A to B), a backward extrusion process (C to D), a punching (D to E), a rolling (E to F) and a finishing, wherein an outer diameter of a first intermediate material (11a) produced by the upsetting is equal to or smaller than an inside diameter of an inner periphery large diameter portion (18) of the inner circumference of a die (13) used in the backward extrusion process and larger than an inside diameter of an inner periphery small portion (19) of the die (13), and in a condition with the first intermediate material (11a) sitting on the inner periphery inclined portion (20) of the die (13), the intermediate material (11a) is pushed toward a base of the die (13) by a punch (14), to thereby the middle metal material (29) with the highest cleanliness of the raw material (10) is exposed to the two outer ring raceways (2) of the outer ring (3).
摘要:
A light reflector including a laminate film having a light-diffusive layer on one surface of a substrate layer, wherein the surface roughness index of the light-reflective surface is at least 1, the reflectance thereof is at least 95%, and the regular reflectance thereof is at most 3%. The light reflector has higher brightness and higher reflectivity.
摘要:
The method of predicting the amount of deformation due to shrinkage of a molded article of the present invention finds a support point P of the bending moment M from a distribution of shrinkage rates of a molding material forming a molded article 10 and uses the support point P to predict the amount of deformation. At that time, it is preferable to use the support point P to find the bending moment M and to use the bending moment M to predict the amount of deformation.
摘要:
Disclosed is a light reflector formed of a white polyolefin film which contains a polyolefin resin and a filler and is oriented at least monoaxially to have an areal draw ratio of from 1.3 to 80 times, which has a whole ray reflectance of at least 95% and undergoes a dimensional change of at most 1.5% when left at 70° C. for 300 hours, and which has a melting-starting temperature of 70° C. or higher. The light reflector hardly causes brightness unevenness of the planar light source when it is built in a planar light source device and used for a long period of time.
摘要:
A manufacturing method for a synthetic resin hollow molded body includes a first injection molding process, a positioning process and a second injection molding process in which each of the contact portions of the first split assembly member, second split assembly member, and the third split assembly member is made to contact the corresponding contact portion and each of the contact portions is joined with the corresponding contact portion by a second injection between the first die and the second die.
摘要:
A semiconductor device includes a semiconductor chip formed with connection terminals, an elastic structure interposed between a main surface of the chip and a wiring substrate formed with wirings connected at first ends thereof to the connection terminals, and bump electrodes connected to the other ends of the wirings. The connection terminals may be at a center part or in peripheral part(s) of the chip main surface and both the elastic structure and wiring substrate are not provided at locations of connection terminals. A resin body seals at least the connection terminals and the exposed first ends of wirings (leads). In a scheme in which the connection terminals are located in a peripheral part of the chip main surface, the wiring substrate protrudes beyond the chip boundary where the connection terminals are arranged, and the resin body shape is restricted by the protruding part of the wiring substrate.
摘要:
An insert is held in a cavity within a die set by a movable hold member. Molten resin is injected into the cavity when the insert is held by the hold member. The hold member is separated from the insert at a given timing. A surface of the hold member is heated to a temperature higher than a temperature of an inner surface of the die set. The hold-member surface contacts the molten resin. The die-set inner surface is exposed in the cavity.