Toray Industries, Inc.

Wataru Gouda

Takayuki Uto

Syunichi Osada

Yuji Matsuo

Takahito Sakai

Hisato Matsui

Jun Sakamoto

Hiroji Kojima

Masaaki Umehara

Shunichi Osada

Masatoshi Oyama

Hideaki Toyama

The present invention aims to provide a multi-layer sheet with excellent electromagnetic wave shielding properties. The multi-layer sheet includes an alternating multilayer unit with five or more A layer and B layer alternately laminated, in which the electromagnetic return loss at the peak top in the peak of return loss spectrum with the highest return loss at the peak top is 5 dB or more in a chart of the return loss in the multi-layer sheet.

Laminated sheet

The laminate film is a laminate including 51 or more layers in which an A layer mainly composed of a thermoplastic resin A and a B layer mainly composed of a thermoplastic resin B, which is different from the thermoplastic resin A, are alternately laminated. A transmission spectrum X is obtained by exposing the film to linear polarized light (X wave) that oscillates in the alignment direction of the film over a range of wavelengths from 300 to 900 nm. A transmission spectrum Y is obtained by exposing the film to linear polarized light (Y wave) that oscillates in the direction perpendicular to the alignment direction of the film over a range of wavelengths from 300 to 900 nm. The area Amax (nm·%) of the largest region among regions enclosed by the transmission spectrum X and the transmission spectrum Y is 150 to 1500.

Laminate film

The present invention provides a laminate film and a display member including the laminate film, which are excellent in visibility of external information such as scenery and displayability of information from a projection member, and are also excellent in color tone reproducibility. The laminate film includes a laminate of 50 or more alternately arranged layers of a plurality of different thermoplastic resins, the laminate film having a transmittance of light incident perpendicularly to a film surface of 50% or more, the laminate film satisfying a relationship of R20&#x2264;R40&#x3c;R70, wherein R20, R40, and R70 are reflectances of a P-wave incident at angles of 20&#xb0;, 40&#xb0;, and 70&#xb0;, respectively, to the normal to the film surface, the reflectance of R70 being 30% or more, reflected light of the P-wave incident at 70&#xb0; to the normal to the film surface having a saturation of 20 or less.

Layered film and display device

The present invention provides a light source unit capable of displaying an image of a desired color without causing color unevenness when mounted on a display. A light source unit including: a light source; a color conversion member that converts incident light incident from the light source into light having a longer wavelength than the incident light does; and a reflective film that is present between the light source and the color conversion member, transmits light incident from the light source, and reflects light exited from the color conversion member, wherein in the reflective film, the scattering angle (R2&#x2212;R1) on at least one film surface is 5&#xb0; or more, where the scattering angle is obtained from angles R1 and R2 (R1&#x3c;R2) at which the transmitted light intensity is Tmax(0)/100 relative to the maximum transmitted light intensity of halogen light incident perpendicularly to the film surface of Tmax(0).

Light source unit

A light source unit includes: a light source; a color conversion film containing an organic luminous material that converts incident light made incident from the light source into light with a longer wavelength than that of the incident light; and a laminated film comprising a constitution in which 11 or more layers of different thermoplastic resins are alternately laminated with each other.

Light source unit, laminated member, and display and lighting apparatus including them

A light source unit is provided which makes an excellent contrast between the black display portions and the white display portions if mounted on a display, while having a high frontal luminance. The light source unit includes: a light source; a color conversion material that converts incident light from the light source into light having a longer wavelength than the incident light; and a reflective film that exists between the light source and the color conversion material and that transmits light from the light source incident perpendicularly on the film surface and reflects light from the color conversion material incident perpendicularly on the film surface; wherein the P-Polarized light of the light incident from the light source on the reflective film surface at an angle of 20&#xb0;, 40&#xb0;, and 60&#xb0; is reflected at a reflectance of R20(%), R40(%), and R60(%) respectively, which satisfy R20&#x3c;R40&#x3c;R60.

A multilayer film includes 50 or more layers of each of two or more thermoplastic resins having different optical properties are alternately laminated with each other, wherein the average reflectance in a wavelength range of 900 to 1,200 nm is 70% or higher; both of the differences between the a* values (&#x394;a*) and between the b* values (&#x394;b*), respectively, of transmitted light incoming at an angle of 12&#xb0; and of transmitted light incoming at an angle of 45&#xb0; are 10 or less; and the multilayer film comprises a bandwidth of not less than 50 nm where the transmittance is 80% or lower in a wavelength range of 400 to 800 nm.

Laminate film and automotive window glass using same

A laminated film includes a structure where each 200 layers or more of a layer composed of a resin A (A layer) and a layer composed of a resin B (B layer) are alternately laminated, wherein a relative reflectance in a wavelength range of 400 nm to 1000 nm is 30% or more, tensile stresses at 100% elongation in a longitudinal direction and a width direction of the film are 3 MPa or more and 90 MPa or less in a tensile test at 150&#xb0; C., and the number of layers with a layer pair-thickness of 120 nm or more and less than 220 nm is 1.05 times or more to 2.5 times or less the number of layers with a layer-thickness of 220 nm or more and 320 nm or less.

Laminated film and molded body

An optical waveguide film is provided having a cross-sectional structure wherein claddings composed of a thermoplastic resin B and dispersions (cores) composed of a thermoplastic resin A extend in the machine direction of the film and are arrayed in the transverse direction of the film, the optical waveguide film comprising not less than 3 cores, diameters (We1, We2) of cores located at the both ends in the transverse direction of the film and diameter (Wc) of a core in the central portion in the transverse direction of the film satisfying the following Formulae (1) and (2), the optical waveguide film comprising a continuous cladding layer at at least one side thereof, the thicknesses of the cladding layers (Te1, Te2) at the both ends thereof in the transverse direction of the film and the thickness (Tc) of the cladding layer in the central portion in the transverse direction of the film satisfying the following Formulae (3) and (4):0.8&#x2266;We1/Wc&#x2266;1.2&#x2003;&#x2003;Formula (1)0.8&#x2266;We2/Wc&#x2266;1.2&#x2003;&#x2003;Formula (2)0.8&#x2266;Te1/Tc&#x2266;1.2&#x2003;&#x2003;Formula (3)0.8&#x2266;Te2/Tc&#x2266;1.2&#x2003;&#x2003;Formula (4).

Optical waveguide film

A laminated film with 200 or more laminated layers which include at least layers comprising a resin A and layers comprising a resin B where, taking the layers comprising the resin A having a layer thickness from 10 nm to 1000 nm as a layer group L, the layer group L has layers La, Lb and Lc and, in the direction from one surface to the other, these are arranged in the order of the layer La, the layer Lb, and the layer Lc, the thicknesses of the layers La and Lc are the same and at least 30 layers, each layer comprising the resin A, are included between the layer La and the layer Lc, and the thickness of the layer La is at least 1.4-fold or more and 0.7-hold or less the thickness of the layer Lb.

Laminated film and molding and reflector

An object of the present invention is to provide a film having a high brightness and a natural metal-effect, and also having excellent formability, causing no delamination and maintaining the metal-effect after forming. Another object is to provide a molded body having less environmental burden, excellent in recycling efficiency and giving no electromagnetic interference. A laminated film including a structure where each 30 layers or more of a layer composed of a resin A (A layer) and a layer composed of a resin B (B layer) are alternately laminated, wherein a relative reflectance in a wavelength range of 400 nm to 1000 nm is 30% or more, tensile stresses at 100% elongation in a longitudinal direction and a width direction of the film are 3 MPa or more and 90 MPa or less in a tensile test at 150&#xb0; C., and the number of layers with a layer-pair thickness of 10 nm or more and less than 220 nm is more than the number of layers with a layer-pair thickness of 220 nm or more and 320 nm or less.

Growing community of inventors

Otsu, Japan

Wataru Gouda