Yupo Corporation

Takahiko Ueda

Hiroshi Koyama

Tomotsugu Takahashi

Yuichi Iwase

Tamio Shikano

Shunsuke Honda

Haruto Nagakusa

Takaaki Asakura

A film that is excellent in easy cuttability and linear cuttability and suppressed in breakability in processing, and a roll and a pressure-sensitive adhesive tape that includes the film. The film has the tensile strength in one direction is 1.1 to 2.5 kN/m and the tensile strength in a direction orthogonal to the one direction is 3.0 to 10 kN/m, or the tensile strain at tensile strength in one direction is 50 to 150% and the tensile strain at tensile strength in a direction orthogonal to the one direction is 8 to 20%.

Film, roll and adhesive tape

A thermoplastic resin film of the present invention contains at least a base layer containing a thermoplastic resin and a heat seal layer containing a thermoplastic resin; a melting point of the thermoplastic resin contained in the heat seal layer is lower than a melting point of the thermoplastic resin of the base layer; a core roughness depth Rk of a surface of the heat seal layer being from 1.2 to 9.0 &#x3bc;m; and a ratio Rzjis/Rk of a ten point height of roughness profile Rzjis to a core roughness depth Rk of the surface of the heat seal layer measured in accordance with JIS B0601:2013 Appendix 1 being from 2.0 to 9.0.

Thermoplastic resin film and production method thereof, in-mold molding label, and plastic container with label and production method thereof

A light reflector including a multilayer film wherein the multilayer film includes a substrate layer and an emission line preventing layer including a scale-like light reflecting section, and the reflection angle light quantity ratio is from 1.5 to 6.5. The light reflector is capable of preventing generation of emission lines when it is incorporated in a planar light source device or an illuminating device.

Light reflector, and planar light source device and illuminating device using the light reflector

A light reflector of which the bidirectional reflectance Ris from 90 to 120% when the light entrance angle is 15&#xb0; and the light acceptance angle is 0&#xb0;, and the bidirectional reflectance Ris from 85 to 110% when the light entrance angle is 75&#xb0; and the light acceptance angle is 0&#xb0;. The light reflector has high reflectivity, and attains brightness improvement even in underlight-type backlights.

Light reflector and planar light source device

A light reflector comprising a resin film having a reflection angle peak ratio [i.e. (reflection peak value when a light ray is applied at an angle of 45&#xb0; to the perpendicular line of the reflection surface)/(reflection peak value when a light ray is applied at an angle of 15&#xb0; to the perpendicular line of the reflection surface)] of from 1.3 to 10, and a specular reflectance [i.e. (reflectance)&#x2212;(diffuse reflectance)] of from 1.4% to 10%. This light reflector can prevent generation of a bright line even when it is used in an illumination device having a plurality of light sources.

Light reflector, planar light source and illumination device using the same

Disclosed is a forgery-preventing film having, on one side of a first layer (A) comprising a thermoplastic resin, a second layer (B) comprising a thermoplastic resin wherein said film satisfying at least one of the following conditions: Condition 1: one side of said first layer (A) is treated to prevent forgery and said second layer (B) is formed on the surface of the treated side of said first layer (A); Condition 2: said second layer (B) comprises at least two thermoplastic resins of different melt viscosities; Condition 3: porosity of said second layer (B) is greater than porosity of said first layer (A); and Condition 4: a polymer net is formed on one side of said first layer (A) and said second layer (B) is formed on the surface having the polymer net.

Forgery-preventing film

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.

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&#xb0; C. for 300 hours, and which has a melting-starting temperature of 70&#xb0; 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.

Optical reflector and planar light source device

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&#x2212;Rd) of 8-30% in which Ris 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.

Semitransparent reflector

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&#xd7;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/cmthereto, 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. The planar light source device is characterized in that the light guide therein is hardly scratched and the device is lightweight.

Growing community of inventors

Ibaraki, Japan

Takahiko Ueda