摘要:
A system for manufacturing a cylindrical, nanoimprint lithography master includes, in one embodiment, a flat master coated with a first layer of compliant photopolymer material, a cylindrical master with an outer sleeve formed from a second layer of compliant photopolymer material, and a light source. The cylindrical master is disposed in tangential contact against the flat master such that the first and second layers of compliant material exhibit 5%-20% compressive strain within the region of contact. Through such pressure, the feature pattern in the flat master is imprinted into the first layer of material. Light from the light source is acutely focused into a narrow curing zone within the contact region. Curing causes the first layer of photopolymer material to bond to the outer sleeve. Through geometric matching and synchronized movement between the flat and cylindrical masters, the cylindrical master can be patterned about its periphery without creating a seam.
摘要:
According to one aspect, an optical waveguide comprises a waveguide body exhibiting total internal reflection, a substrate, and a plurality of light extraction features disposed on a surface of the substrate. The light extraction features are non-adhesively bonded to the waveguide body or may be disposed on opposing sides of the substrate. A method of forming an optical element is also disclosed.
摘要:
This invention relates to the manufacturing of durable thermoset in-mold finishing films (TIMFFs) combining in-mold decorating and in-mold durable exterior grade coating capabilities, to molded articles having TIMFFs adhering to their surfaces and both showing a decoration and providing protection, and to thermosetting resin formulations used in the manufacturing of TIMFFs. In some embodiments, the thermoset is prepared via polyurethane chemistry; the manufacturing process comprises reaction injection molding (RIM) with a specially designed mold; and articles having TIMFFs adhering to their surfaces include graphic panels for durable signage, structural graphics, molded flooring, prefabricated housing, aerospace structures and body panels, automotive structures and body panels, and marine structures and body panels. In addition to RIM, the TIMFF technology is also compatible with other processes, such as injection molding, compression molding, resin transfer molding, spin casting, rotational molding, thermoforming, roll lamination, use of a platen / laminate press, and blow molding.
摘要:
Described is a method of providing a rubber article (100) with a digital code pattern (102), wherein the rubber article (100) comprises a cured polymer material (104), the method comprising: Generating, e.g. by means of electromagnetic radiation (110), a digital code pattern (102) in the cured polymer material of the rubber article, the digital code pattern (102) comprising a first surface portion (106) and a second surface portion (108) having different optical reflectivity. Generating the digital code pattern (102) may include generating protrusions (114) or holes (126) in the second surface portions (108). The digital code pattern (102) may identify the rubber article (100) e.g. within a batch of rubber articles. Described is also a rubber article (100) comprising a digital code pattern (102), a rubber article marking device and a computer program product for controlling a rubber article marking device.
摘要:
A process for curing of an adhesive (16) using laser (20) energy. A substrate sandwich assembly (12) is provided with an adhesive (16) interposed between the substrates (14,18). The adhesive (16) used at least partially requires heat to assist in curing of the adhesive (16). The area where the adhesive (16) is found in the sandwich (12) is heated with a laser (20). The laser (20) used is defocused for instance the laser is focused to a point (22) behind the substrates (14,18) to be bonded. Thereafter the defocused laser (20) is used to contact the surface of the substrates (14,18) to be bonded at the location of said adhesive (16) with the out of focus laser (20) energy beam for imparting heat on the bonding area with an effective amount of laser (20) energy sufficient to assist in bond curing of the adhesive (16) at that area.