A crosslinked polyolefin separator having a ratio (A/B) of storage modulus G′ (A) to loss modulus G″ (B) of 2 or more, at a range of the frequency of the crosslinked polyolefin separator of 1 rad/s or less, in the frequency-loss/storage modulus curve. The crosslinked polyolefin separator is controlled to have a high ratio of storage modulus to loss modulus, and thus maintains its elasticity even at high temperature. Therefore, it is possible to provide a separator having improved safety.

An optical forming device includes a light source to emit light for causing liquid photocurable resin to undergo curing and an optical modulator to modulate the light for causing the liquid photocurable resin to undergo curing in a pattern based on a shape of a three-dimensional object, and irradiate the liquid photocurable resin with the modulated light. The optical modulator includes a liquid crystal device to modulate the light for causing the liquid photocurable resin to undergo curing in the pattern, and emit the modulated light as linearly polarized light and an optical retardation device to impart a phase difference to the linearly polarized light emitted from the liquid crystal device, and emit the light imparted with the phase difference.

A system includes a curing assembly for low temperature curing and residual stress relief of material substrates. The curing assembly includes a first exposure chamber configured to expose the material substrate to UV radiation, and a second exposure chamber configured to expose the material substrate to Gamma radiation. In some embodiments, a mixing apparatus may mix nano-filler particles into the material substrate prior to exposure to Gamma radiation. The cure assembly may also include a control system for determining exposure dosages and exposure times based at least in part, on the material properties of the material substrate.

A post-exposure unit for post-exposure of a body manufactured using an additive manufacturing method from a substance curable by radiation, the post-exposure unit comprising at least one radiation source configured for post-exposure, the post-exposure unit including at least one radiation sensor, the radiation sensor being adapted to capture radiation emitted by the radiation source. The post-exposure unit has a receiving space for receiving a body to be post-exposed. The radiation sensor is adapted to capture radiation emitted by the radiation source and traverses at least a part of the receiving space at least once.

A method for manufacturing a film structure includes: a positional deviation amount detection process of detecting an amount of positional deviation related to a relative position of a second cured film formed on a rear surface of a film with respect to a first cured film formed on a front surface of the film; a relative position adjustment process of correcting a position or a rotation speed of a second transfer roll to adjust the relative position such that the amount of positional deviation detected in the positional deviation amount detection process is reduced; a first tensile force detection process and a second tensile force detection process of respectively detecting a tensile force of the film between a first pressurizing roll and a second pressurizing roll before and after the relative position adjustment process; and a tensile force adjustment process of adjusting the tensile force of the film such that the tensile force of the film detected in the second tensile force detection process approaches the tensile force of the film detected in the first tensile force detection process.

Method for producing arrays of free standing, three dimensional structures on material surfaces by establishing contact with a template, moving the template and the surface in contact relative to one another, inducing an increase in viscosity such that the structures are self-supported, and removing the template, leaving a negative of the template geometry at the tip of the object.

Techniques are described for applying an edge sealant to the edge of a multi-layer optical device. In particular, embodiments provide an apparatus that performs a precision measurement of the perimeter of an eyepiece, applying the edge sealant (e.g., polymer) based on the precision-measured perimeter, and subsequently cures the edge sealant, using ultraviolet (UV) light that is directed at the edge sealant. The curing process may be performed within a short time following the application of the edge sealant, to ensure that any wicking of the edge sealant between the layers of the eyepiece is controlled to be no greater than a particular depth tolerance. In some examples, the edge sealant is applied to the optical device prevent, or at least reduce, the leakage of light from the optical device, and also to ensure and maintain the structure of the multi-layer optical device.

A method of producing a shaped object includes preparing a formation sheet that includes a base and a thermally expansive layer that is laminated on a first main surface of the base, the thermally expansive layer containing a binder and a thermal expansion material; laminating, onto a second main surface on a side opposite to the first main surface of the base or onto the thermally expansive layer, a thermal conversion layer in predetermined pattern, the thermal conversion layer converting first electromagnetic waves into heat; and causing the thermally expansive layer to expand in a pattern that corresponds to the predetermined pattern by irradiating the formation sheet on which the thermal conversion layer is laminated with the first electromagnetic waves and second electromagnetic waves that cause the binder to become cross-linked.

Disclosed herein is a method for transferring an embossed structure to at least a part of a surface of a coating composition (C2a) using a composite (S1C1) including a substrate (S1) and an at least partially embossed and at least partially cured coating (C1) upon following steps (1), (2-i) and (3-i) or (2-ii) and (3-ii), and also at least step (4) and optionally step (5-i) or (5-ii), where the coating composition (C1a) is a radiation-curable coating composition of defined constitution and the composite (S1C1) is used as embossing mold (e2) of an embossing tool (E2).

A multi-station stereolithographic group, includes: support and movement apparatus for a modelling plate with respect to a fixed base facing the modelling plate, the fixed base including at least two work stations positioned in respective areas able to be reached by the modelling plate moved by the support and movement apparatus. Such a fixed base includes at least three work stations: at least one first station for forming an object, at least one second station for washing a formed object, at least one third station for stabilising a formed object.