The invention relates to a RM lens obtainable from a polymerizable liquid crystalline medium comprising, a polymerizable liquid crystalline component A comprising one or more polymerizable mesogenic compounds, and at most 12% by weight of the total medium of a non-mesogenic component B. Moreover, the invention relates to the use of such birefringent RM lenses in electro optical devices, such as liquid crystal displays (LCDs) or other optical or electrooptical devices, for decorative or security applications.

Multilayered polymer films are configured so that successive constituent layer packets can be delaminated in continuous sheet form from the remaining film. The new films are compatible with known coextrusion manufacturing techniques, and can also be made without the use of adhesive layers between layer packets that are tailored to be individually peelable from the remainder of the film. Instead, combinations of polymer compositions are used to allow non-adhesive polymer layers to be combined in such a way that delamination of the film is likely to occur along a plurality of delamination surfaces corresponding to interfaces between particular pairs of layers for which the peel strength is reduced relative to the peel strength at other layer interfaces within the film. The absence of an adhesive between peelable layer packets results in the delamination being irreversible.

This disclosure provides new methods to characterize and relate residual stress and orientation imparted to the injection molded polymeric preform with orientation and residual stress in the resulting blow molded bottle. The method developed allows one to define and map the coupled thermal stress histories of both processes to define applicable preferred mutual processing windows for both preform and bottle molding processes. Stretch blow-molding parameters are developed using the disclosed method.

A long-length film formed of a resin containing a polymer having crystailizability, wherein the long-length film has an orientation axis perpendicular to a long side direction of the long-length film, the long-length film has an Nz factor Nz1 satisfying (formula 1), the long-length film has a birefringence n satisfying (formula 2), and the polymer has a crystallization degree X satisfying (formula 3):

1.0Nz11.15(formula 1)

0.01n0.1(formula 2)

15%X(formula 3).

A PVB film for HUD, a forming mold and a forming method thereof are presented. The accuracy error of HUD imaging achieved by the PVB film for HUD is 0.1 mrad. The forming mold includes an upper mold and a lower mold, the two of which can form an enclosed mold cavity when clamped together, wherein protective films are disposed on inner surfaces of the upper mold and the lower mold, respectively, for supporting PVB material and preventing the PVB material from bonding with the upper mold and the lower mold, and wherein shapes of the protective films match shapes of the upper mold and the lower mold.

A phase difference plate including: a first layer which is formed from a resin having a positive intrinsic birefringence value, and has birefringence; and a second layer which is formed from a resin having a negative intrinsic birefringence value, and has birefringence, wherein a retardation Re(450) at a wavelength of 450 nm of the phase difference plate, a retardation Re(550) at a wavelength of 550 nm of the phase difference plate, and a thickness d of the phase difference plate satisfy formula (I) Re(450)/Re(550)<0.92 and formula (II) Re(550)/d>0.0035; and production method therefor.

The present invention provides a birefringent lens material for a stereoscopic image display, the birefringent lens material containing two or more liquid crystal compounds each having at least one polymerizable functional group, a birefringent lens for a stereoscopic image display, the birefringent lens being formed by using the lens material, and a method for producing a birefringent lens for a stereoscopic image display using the lens material. The birefringent lens material for a stereoscopic image display and the birefringent lens for a stereoscopic image display of the present invention are good in terms of optical characteristics, durability, and productivity, in particular, productivity. The method for producing a birefringent lens for a stereoscopic image display of the present invention has good productivity.

A method for manufacturing a retardation film by using a dual-axial stretching process uses a PMMA to produce a cast film. The cast film is stretched in both a proceeding direction and a width direction simultaneously by 1.05.0 times in both the length and the width. By using a predetermined annealing temperature to co-coordinate shrinking of the film in both directions simultaneously, decrease of the refraction ability caused by the stretching can be controlled. To attain high uniformity of the optical characteristics of the film, the surface temperature of the film during the stretching process is controlled within a predetermined range, then the optical variation thereof is improved, and thus the following optical characteristics are achieved: R0: 03 nm and Rth: 400 nm; wherein R0=*Te+*Xe+*Ts+*Xs+C1 and Rth=a*Te+b*Xe+c*Ts+d*Xs+C2.

A long-fiber nonwoven fabric of the present invention contains a resin having a polyethylene terephthalate component of 99% or more. The long-fiber nonwoven fabric has a dry heat area shrinkage rate of 30% or more at 100 C. for 3 minutes, and constituent fibers of the long-fiber nonwoven fabric have a birefringence index (n) of 1010.sup.3 to 6010.sup.3 and a specific gravity of 1.335 to 1.340 g/cm.sup.3.

An optical film including a polymer including a repeating unit A including a repeating unit represented by the following Chemical Formulas 1 to 3, or a combination thereof; and a repeating unit B derived from a monomer having an unsaturated bond copolymerizable with the repeating unit A, wherein the optical film has a short wavelength dispersion of an in-plane phase-difference value (R.sub.e) (450 nm/550 nm) ranging from about 0.81 to about 1.20, and a long wavelength dispersion of an in-plane phase-difference value (R.sub.e) (650 nm/550 nm) ranging from about 0.90 to about 1.18: ##STR00001##
wherein, in Chemical Formulas 1 to 3, the variables R.sup.1 to R.sup.21 are defined herein.