Abstract: There are provided a thermoplastic resin film suitable for forming a meltable bag for packaging a hot-melt adhesive, the thermoplastic resin film having a high melting rate and high bag breakage resistance because adhesion between thermoplastic resin films is suppressed when packaged hot-melt adhesives are stored in a stacked manner and thus the breakage of the meltable bags is suppressed when the meltable bags are peeled apart, a meltable bag formed of the thermoplastic resin film, and a packaged hot-melt adhesive. A thermoplastic resin film contains at least one resin selected from the group consisting of a polyethylene resin and an ethylene-based copolymer, wherein (1) the film has at least one embossed surface, and the at least one embossed surface has a ten point height of irregularities Rzjis of 10 to 200 ?m, (2) the film has a melting point of 60° C. to 120° C., and (3) an elastic modulus in a TD direction and an elastic modulus in an MD direction are both 15 MPa or more.

Abstract: The present invention aims to provide a chemically strengthened glass plate which has a good yield in a cutting process of the chemically strengthened glass plate and has sufficient strength. The chemically strengthened glass plate has a surface compressive stress of not less than 600 MPa at a surface of the chemically strengthened glass plate, and a compressive stress layer containing two types of stress patterns A and B. The stress pattern A is a stress pattern of a surface portion of the glass plate, and the stress pattern B is a stress pattern of an inside of the glass plate. The stress patterns satisfy the formula SA>SB where SA represents a slope of the stress pattern A and SB represents a slope of the stress pattern B when the stress patterns A and B are each approximated by a linear function.

Abstract: The present invention aims to provide a chemically strengthened glass with cutting easiness and a higher compressive residual stress than the conventional one, made of soda-lime glass. The chemically strengthened glass of the present invention is a chemically strengthened glass manufactured by ion exchange of a surface layer of a glass article to replace alkali metal ions A which are the largest in amount among all the alkali metal ion components of the glass article with alkali metal ions B having a larger ionic radius than the alkali metal ions A, wherein the glass article before the ion exchange is made of soda-lime glass substantially composed of SiO2: 65 to 75%, Na2O+K2O: 5 to 20%, CaO: 2 to 15%, MgO: 0 to 10%, and Al2O3: 0 to 5% on a mass basis, the chemically strengthened glass after the ion exchange has a surface compressive stress of 600 to 900 MPa, and has a compressive stress layer with a depth of 5 to 20 ?m at a surface of the glass.

Abstract: The present invention aims to provide a chemically strengthened glass plate which has a good yield in a cutting process of the chemically strengthened glass plate and has sufficient strength. The chemically strengthened glass plate has a surface compressive stress of not less than 600 MPa at a surface of the chemically strengthened glass plate, and a compressive stress layer containing two types of stress patterns A and B. The stress pattern A is a stress pattern of a surface portion of the glass plate, and the stress pattern B is a stress pattern of an inside of the glass plate. The stress patterns satisfy the formula SA>SB where SA represents a slope of the stress pattern A and SB represents a slope of the stress pattern B when the stress patterns A and B are each approximated by a linear function.

Abstract: The present invention aims to provide a cover glass for display devices, made of soda-lime glass, excellent in cutting easiness and reliability of surface strength. The cover glass for display devices of the present invention includes a chemically strengthened glass, and has a compressive stress layer having a depth of 6 to 15 ?m. In the cover glass, a shape parameter determined in accordance with JIS R 1625 (1996) based on analysis of a facture stress of the cover glass measured by a coaxial double ring test is not less than 7, and strength of the cover glass when a cumulative fracture probability is 1% is not less than 450 MPa. The glass plate before the ion exchange is made of soda-lime glass.

Abstract: The invention relates to a lithium-sodium-aluminosilicate glass composition. This glass composition has a softening point of 700° C. or lower; a first temperature (1450° C. or lower) at which the glass composition exhibits a viscosity of 102 poises; a second temperature (1000° C. or lower) at which the glass exhibits a viscosity of 104 poises; and a mean thermal expansion coefficient between 30° C. and a glass transition temperature of the glass composition. This coefficient is within a range of from 90×10−7/° C. to 130×10−7/° C. The glass composition can be easily formed into a precursor of a glass article by pressing. It is possible to obtain a glass article that is chemically strengthened from the precursor by conducing alkali ion exchange.

Abstract: The present invention relates to a cathode ray tube having an inner magnetic shield and to a method for fixing the inner magnetic shield. The inner magnetic shield is fixed to a frame supporting a shadow mask simply with fixing members. First engagement holes are provided on each side of a first flange portion of the frame, and second engagement holes are provided on each side of a second flange portion of the inner magnetic shield. Each side of the second engagement hole is provided with a folding portion. The fixing member is inserted so as to put into the first engagement hole and the second engagement hole facing the first engagement hole from the side of the inner magnetic shield.

Abstract: The present invention relates to a cathode ray tube having an inner magnetic shield and to a method for fixing the inner magnetic shield. The inner magnetic shield is fixed to a frame supporting a shadow mask simply with fixing members. First engagement holes are provided on each side of a first flange portion of the frame, and second engagement holes are provided on each side of a second flange portion of the inner magnetic shield. Each side of the second engagement hole is provided with a folding portion. The fixing member is inserted so as to put into the first engagement hole and the second engagement hole facing the first engagement hole from the side of the inner magnetic shield.

Abstract: The invention relates to a method of tempering a glass sheet by first suitably heating the glass sheet and quenching the heated glass sheet by directing jets of air onto both surfaces of the glass sheet from two sets of nozzles respectively protruding from oppositely disposed two air chambers. At the start of quenching, each air chamber is suddenly allowed to communicate with a source of compressed air kept at a predetermined first pressure in the range from 2 to 8 kg/cm.sup.2 (gauge pressure) such that a rapid drop from the first pressure to a predetermined second pressure in the range from 0.05 to 0.5 kg/cm.sup.2 (gauge pressure) takes place as the compressed air expands into the air chamber and such that substantially the whole length of the air chamber and the nozzles serves as a sort of shock wave tube. Consequently, the air jets arriving at the glass sheet surfaces at the initial stage of quenching are very high in kinetic energy and heat dissipating power.

Abstract: In toughening a glass sheet, e.g. for use as an automobile window, by heating it to a temperature above the strain point and quenching the heated glass sheet by blowing a cooling medium such as compressed air against both sides of the glass sheet from two opposite sets of nozzles, the cooling medium is caused to impinge on each side of the glass sheet in such a pattern that the glass sheet is more efficiently quenched and consequently more highly toughened in a generally circular central region and a plurality of generally annular regions, which are substantially concentrical about the center of the glass sheet and radially spaced from one another, than in the remaining regions. This is effective in preventing the presence of impermissibly elongated particles when the glass sheet is fractured and also in lessening the difference between the maximum and minimum numbers of particles in unit areas of the fractured glass sheet.

Abstract: A glass composition particularly useful for producing alkali-resistant glass fibers, containing, by weight, from 53 to 63% SiO.sub.2, from 21 to 23% ZrO.sub.2 and from 10 to 21% Na.sub.2 O.