To obtain a liquid crystal polymer film having a small in-plane linear expansion coefficient. A liquid crystal polymer pellet contains a liquid crystal polymer and is used as a material of a liquid crystal polymer film. The liquid crystal polymer pellet has an orientation degree of 86% or more as measured by wide-angle X-ray scattering.

The present invention relates to a laminate film including a resin layer having a thickness of from 10 m to 125 m; and a toner layer formed on one surface of the resin layer, in which the resin layer is formed from a resin material having a glass transition temperature of 130 C. or higher, the toner layer has a plurality of voids, and when a value defined by the following formula (S1) using the void area ratio, which represents the ratio of the area of exposed voids, for the respective faces of the surface of the toner layer and a cross section of the toner layer, is designated as porosity, and when two void area ratios respectively corresponding to the cross sections of the toner layer in two orthogonally intersecting directions are used as the void area ratios of the cross sections of the toner layer, the porosities respectively calculated according to the two void area ratios are both from 0.01% to 0.40%. $\begin{array}{c}\mathrm{Porosity}\left(\%\right)=\frac{\mathrm{Void}\mathrm{area}\mathrm{ratio}\mathrm{of}\mathrm{cross}\mathrm{section}\left(\%\right)}{100}\frac{\mathrm{Void}}{}\end{array}$

A resin multilayer substrate includes a laminate including resin layers including a first resin layer and a second resin layer that are laminated, a via conductor in the first resin layer, and a joint portion that includes at least a portion in the second resin layer and is joined to the via conductor. The joint portion is more brittle than the via conductor. A linear expansion coefficient of the second resin layer is larger than a linear expansion coefficient of the via conductor and a linear expansion coefficient of the joint portion, and is smaller than a linear expansion coefficient of the first resin layer.

A fibrillated liquid crystal polymer powder containing fibrillated liquid crystal polymer particles. A paste containing a dispersion medium and the fibrillated liquid crystal polymer powder. A method of producing the fibrillated liquid crystal polymer powder. A resin multilayer substrate obtained by laminating a plurality of resin sheets including at least one layer of a liquid crystal polymer sheet. On a surface of at least one layer of the liquid crystal polymer sheet, a thickness adjustment layer made of a fibrillated liquid crystal polymer powder containing fibrillated liquid crystal polymer particles is provided in a region insufficient in thickness when at least the plurality of resin sheets are laminated.

The invention provides a method for manufacturing a 3D polymer dispersed liquid crystal (PDLC) composite layer structure. A 3D PDLC composite layer is first provided and has an upper transparent resin substrate, a lower transparent resin substrate, a PDLC layer, an upper protective layer and a lower protective layer. The 3D PDLC composite layer is hot-press molded to form a 3D PDLC composite layer structure with a recess portion, where internal light transmission ratio before hot pressing and after hot pressing are in a range of 0.1%-10%. The upper protective layer and the lower protective layer are removed from the resulting structure.

Provided is a method for producing a metal-clad laminate of a thermoplastic liquid crystal polymer film (TLCP film) and a metal sheet(s) bonded to at least one surface of the film using roll-to-roll processing. The metal sheet has a surface with a ten-point average roughness (Rz) of 5.0 m or less to be bonded to the TLCP film. The method includes preparing the laminate, dry-treating the laminate by subjecting the laminate passed through a dry zone satisfying the following conditions (1) and (2): (1) a drying temperature of lower than the melting point of the TLCP film, (2) for a drying period of 10 seconds or longer, and heat-treating the dried laminate by subjecting the laminate passed through a heating zone on a temperature condition of not lower than the melting point of the TLCP film successively after the dry treatment.

A glass product having a glass piece, an adhesive layer, and a switchable film having variable light transmission sequentially including: a first base layer, a first electrode, a functional layer, a second base layer, and a second electrode. The second base layer is positioned between the functional layer and the second electrode.

A multilayer board includes laminates. Each of the laminates includes a liquid crystal polymer substrate and a metal layer. Each of the liquid crystal polymer substrates has a melting point. When a number of the liquid crystal polymer substrates is an odd number, they include a first middle substrate that is located in the most middle position and has a first melting point lowest among the melting points. The melting points increase in a direction away from the first middle substrate. When the number of the liquid crystal polymer substrates is an even number, they include second and third middle substrates that are located in the most middle position and respectively have second and third melting points that are substantially same. The second or third melting point is lowest among the melting points. The melting points increase in a direction away from the second and third middle substrates.

An optically anisotropic layer is formed by a liquid crystal compound represented by General Formula 1, in which the long axes of the molecules are oriented.

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wherein L.sub.1 and L.sub.2 independently represent a linking group having a carbonyl group; F.sub.1 and F.sub.2 independently represent an alkyl group having 1 to 4 carbon atoms, an alkoxy group having 1 to 4 carbon atoms, or a halogen atom; n and m independently represent an integer from 0 to 4; a and b independently represent an integer from 1 to 4; T.sub.1 and T.sub.2 independently represent a spacer portion including a straight chain or branched alkylene or alkylene oxide group having 2 to 20 carbon atoms; and Ar represents a divalent group having at least one aromatic ring selected from a group consisting of aromatic hydrocarbon rings and aromatic heterocycles, the number of electrons in the Ar group being 8 or greater.

The present application relates to an optical film and a use of the optical film, and can provide an optical film exhibiting selective transmission and blocking characteristics according to viewing angles, and such an optical film can be usefully used as a security film for a display device such as LCD, a smart window, sunglasses and the like.