Abstract: 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.

Abstract: Provided is a planar light source device, which comprises a light guide having at least one side end serving as a light incident side and having one surface serving as a light-emitting side, a light source disposed in the vicinity of the side end of the light guide, and a light reflector disposed on the other side opposite to the light-emitting side, and which is characterized in that the light guide is essentially formed of a polyolefin resin, the light reflector is also essentially formed of a polyolefin resin, and when a piece of the light reflector having a face size of 1.5 cm×1.5 cm is prepared, and it is pressed against the surface of the light guide with its reflective face being in contact with the surface of the light guide under a load of 135 g/cm2 thereto, and, in that condition, when it is reciprocated 10 times on the surface of the light guide to a width of 5 cm every time at a speed of 2.5 cm/sec, then the surface of the light guide is not substantially scratched by it.

Abstract: An object of the present invention is to provide a light reflector, which causes no unevenness in luminance in the surface direction due to deflection in use. The present invention is a light reflector comprising: an olefin-based resin film 1 comprising a filler and having a total ray reflectance of 90% or more, which is stretched at least monoaxially at an area stretch ratio of from 1.5 to 80; and at least one of the following substrates (1) to (4): (1) Film 2 comprising at least one of olefin-based resin and polyester-based resin as a main component; (2) Woven cloth 3 or non-woven cloth 4; (3) Metal plate 5; and (4) Molded material 6 comprising a thermoplastic resin composition (a1) containing a foaming agent and having a foaming ratio of from 1.05 to 10 as calculated by the following equation (1): Foaming ratio=?o/???(1) where ?o represents the density before foaming; and ? represents the density after foaming.

Abstract: An object of the present invention is to provide an easily handleable screen which functions by using the reflected light. The present invention provides a screen comprising a polyolefin-based resin-containing film layer (A) having a total light beam transmittance of less than 30%, a total light beam reflectance of more than 70% to 100%, a glossiness of 60% or less and a density of 0.5 to 1.2 g/cm3.

Abstract: Provided is a planar light source device, which comprises a light guide having at least one side end serving as a light incident side and having one surface serving as a light-emitting side, a light source disposed in the vicinity of the side end of the light guide, and a light reflector disposed on the other side opposite to the light-emitting side, and which is characterized in that the light guide is essentially formed of a polyolefin resin, the light reflector is also essentially formed of a polyolefin resin, and when a piece of the light reflector having a face size of 1.5 cm×1.5 cm is prepared, and it is pressed against the surface of the light guide with its reflective face being in contact with the surface of the light guide under a load of 135 g/cm2 thereto, and, in that condition, when it is reciprocated 10 times on the surface of the light guide to a width of 5 cm every time at a speed of 2.5 cm/sec, then the surface of the light guide is not substantially scratched by it.

Abstract: An object of the present invention is to provide a glossy film which can be deformed or peeled with a small force without requiring any special working for starting peeling to allow easy visual recognition. The present invention is a glossy film containing a base layer (A) which contains a thermoplastic resin and having a thickness of 12 ?m or more when compressed at a load of 32 kgf/cm2 in the thickness direction and a porosity of from 10 to 60% and a gloss layer (C). The present invention is also a glossy film comprising a film (I) containing a base layer (A?) which contains a thermoplastic resin and an easily peelable layer (B) having a peel strength of from 5 to 150 g/cm width and a gloss layer (C)provided on at least one surface of the film (I).

Abstract: A light reflector formed of a biaxially-stretched film which contains a thermoplastic resin and a filler and has an opacity of at least 95%, a whiteness of at least 90%, a reflectance R0 of at least 92%, and an areal draw ratio of from 22 to 80 times, wherein the color difference ?EH, after irradiated with a metal halide lamp spaced from the light reflector by 10 cm under an environmental condition of 83° C. and a relative humidity of 50% and at an intensity of radiation of 90 mW/cm2 for 10 hours, is at most 10. The reflector is free from the trouble of yellowing as in white polyester films heretofore used in reflectors and is stable against color change for a long period of time.

Abstract: Disclosed is a screen having a film layer (A) that comprises a thermoplastic resin and has a whole light transmittance of from 30 to 80% and a whole light reflectance of from 20 to 70%. The screen exhibits its image visibility for both reflected light and transmitted light.

Abstract: An apparatus for correcting the circumferential length of a metal ring has a drive roller 2 and a driven roller 3 positionable closely to each other for training a metal ring W therearound, and a correcting roller 4 disposed between the drive roller 2 and the driven roller 3. The apparatus also has a first displacement applying unit for displacing the drive roller 2 and the driven roller 3 away from each other when the metal ring W is trained around the drive roller 2, the driven roller 3, and the correcting roller 4.

Abstract: Disclosed is a semitransparent reflector having a whole light transmittance (T) of 10-80%, a whole light reflectance (R) of 20-90%, (T+R) of 80-100%, and (R−Rd) of 8-30% in which Rd is the whole light diffusion reflectance. When installed in a display device, the semitransparent reflector ensures efficient light transmission and reflection, and attains a high transmittance and a high reflectance of the display device, therefore significantly improving the letter visibility of the device.

Abstract: Disclosed is a light reflector formed of a biaxially-stretched film which contains a thermoplastic resin and a filler and has an opacity of at least 95%, a whiteness of at least 90%, a reflectance Ro of at least 92%, and an areal draw ratio of from 22 to 80 times, wherein the color difference &Dgr;EH, after irradiated with a metal halide lamp spaced from the light reflector by 10 cm under an environmental condition of 83° C. and a relative humidity of 50% and at an intensity of radiation of 90 mW/cm2 for 10 hours, is at most 10. The reflector is free from the trouble of yellowing as in white polyester films heretofore used in reflectors and is stable against color change for a long period of time.

Abstract: A drum slicing apparatus is capable of highly accurately and efficiently slicing a drum made of a thin metal sheet which is relatively highly flexible. The drum slicing apparatus has a support shaft rotatable about its own axis, a cylindrical drum holder supported on the support shaft for holding the drum by pressing engagement with an inner circumferential surface of the drum over an entire length thereof, and a slicing device having slicing edges for slicing the drum into the metal rings by engaging and cutting into the drum at predetermined cutting positions thereon while the drum is being rotated by the support shaft through the drum holder.

Abstract: An apparatus for correcting the circumferential length of a metal ring has a drive roller 2 and a driven roller 3 positionable closely to each other for training a metal ring W therearound, and a correcting roller 4 disposed between the drive roller 2 and the driven roller 3. The apparatus also has a first displacement applying unit for displacing the drive roller 2 and the driven roller 3 away from each other when the metal ring W is trained around the drive roller 2, the driven roller 3, and the correcting roller 4.

Abstract: A drum slicing apparatus is capable of highly accurately and efficiently slicing a drum made of a thin metal sheet which is relatively highly flexible. The drum slicing apparatus has a support shaft rotatable about its own axis, a cylindrical drum holder supported on the support shaft for holding the drum by pressing engagement with an inner circumferential surface of the drum over an entire length thereof, and a slicing device having slicing edges for slicing the drum into the metal rings by engaging and cutting into the drum at predetermined cutting positions thereon while the drum is being rotated by the support shaft through the drum holder.

Abstract: Provided are an electrophotographic recording sheet, which has an electrostatic capacity of greater than or equal to 4 pF/cm2 and a Clark stiffness of from 15 to 500, and which comprises a thermoplastic resin sheet (A) that is formed by stretching along at least one axis and heat treating at 50 to 250° C.; and a label paper in the form of a laminate sequentially having an adhesive layer (B) and a release paper (C) on one surface of the thermoplastic resin sheet (A), wherein, under a thermomechanical analysis with heating from room temperature to 150° C., a dimensional change ratio (&agr;) of the thermoplastic resin sheet (A) after heating to the unheated thermoplastic resin sheet (A) is from −2.5 to 2.5 percent and the difference (&agr;−&bgr;) is from −1.5 to 1.5 percent, where &bgr; is a dimensional change ratio of the release paper (C) after heating to the unheated release paper (C).

Abstract: An IC tag and label are provided which allow data to be recorded on the surface thereof, are free from security problem that the inner IC circuit or wiring circuit can be seen through, exhibit excellent strength and water resistance, can be used even in the atmosphere and water and can be used for frozen food vessels, industrial products, various chemical vessels, etc. and for flow control, production line control, etc. The IC tag has a laminated structure that includes a thermoplastic resin film layer (A), an adhesive layer (D), and an IC circuit layer (B) or an IC circuit protective layer (C) having a hole containing an IC circuit layer (B). The IC label has a laminated structure that includes a thermoplastic resin film layer (A), an adhesive layer (D), an IC circuit layer (B) or an IC circuit protective layer (C) having a hole containing an IC circuit layer (B), and an adhesive layer (G). An airline tag includes the IC label.

Abstract: A light reflector comprising a biaxially stretched film containing a polyolefinic resin and a filler, wherein said filler is an inorganic filler having an average grain size of 0.1 to 8 &mgr;m and/or an organic filler having a mean dispersion grain size of 0.1 to 8 &mgr;m, and said biaxially stretched film has an area stretched factor of 16 to 80, and having a luminance of 1,200 cd/m2 or above is disclosed. A specific feature of such light reflector of the present invention resides in that improvement in the luminance achieved at low cost is ascribable to the structural feature thereof rather than to the composition.

Abstract: An optically semi-transmission reflection material comprises a resinous film comprising a thermoplastic resin, wherein the sum of total light ray transmittance, T%, and total light ray reflectance, R%, i.e., T+R, is 80 to 100%; an absolute value of their difference is |(T−R)|<50% when displayed value a and displayed value b in transmitted light are designated as aT and bT, respectively, and when in reflected light, displayed value b is designated as br, in the transmitted light, aT and bT are in the range of −2≦aT≦2, and −2≦bT≦1.3 and the difference between the displayed value b to the transmitted light and the reflected light is |(bT−br)|<10.

Abstract: An IC tag and label are provided which allow data to be recorded on the surface thereof, are free from security problem that the inner IC circuit or wiring circuit can be seen through, exhibit excellent strength and water resistance, can be used even in the atmosphere and water and can be used for frozen food vessels, industrial products, various chemical vessels, etc. and for flow control, production line control, etc. The IC tag has a laminated structure that includes a thermoplastic resin film layer (A), an adhesive layer (D), and an IC circuit layer (B) or an IC circuit protective layer (C) having a hole containing an IC circuit layer (B). The IC label has a laminated structure that includes a thermoplastic resin film layer (A), an adhesive layer (D), an IC circuit layer (B) or an IC circuit protective layer (C) having a hole containing an IC circuit layer (B), and an adhesive layer (G). An airline tag includes the IC label.

Abstract: A light reflector comprising a biaxially stretched film containing a polyolefinic resin and a filler, wherein said filler is an inorganic filler having an average grain size of 0.1 to 8 &mgr;m and/or an organic filler having a mean dispersion grain size of 0.1 to 8 &mgr;m, and said biaxially stretched film has an area stretched factor of 16 to 80, and having a luminance of 1,200 cd/m2 or above is disclosed. A specific feature of such light reflector of the present invention resides in that improvement in the luminance achieved at low cost is ascribable to the structural feature thereof rather than to the composition.