Abstract:
Provided are methods for coating plastic substrates with an aqueous coating composition comprising at least one organic polymer as binder, the coating composition being applied to the surface of the plastic substrate and being subsequently cured, wherein the plastic substrate is pretreated before the coating composition is applied, the pretreatment comprising the two following separate steps in the order stated: (A) heat-treating a plastic substrate at an ambient temperature in the range from 60° C. to 160° C. for a period in the range from 1 minute to 20 minutes, (B) flaming the surface of the plastic substrate pretreated as per step (A), there being a period of up to 90 minutes between the ending of step (A) and the beginning of step (B). Additionally, provided are coated plastic substrates that have been coated by the methods of the invention.
Abstract:
A method for forming an inorganic or hybrid organic/inorganic layer on a substrate, which method comprises applying a metal alkoxide to form a layer atop the substrate and exposing the metal alkoxide layer to heat from a catalytic combustion heater in the presence of water to cure the layer is provided.
Abstract:
A printhead assembly is provided for a print-on-demand camera system. The printhead assembly includes an ink ejection printhead integrated circuit (IC). An ink distribution molding is provided to which the IC is mounted, and though which ink is distributed to the IC. A filter covers the ink distribution molding to filter ink passing to the ink distribution molding. A baffle unit is provided in which the ink distribution molding and filter is received, and includes spaced apart baffles to retard ink acceleration. A housing is provided in which the baffle unit is housed.
Abstract:
A printer includes a print roll unit. The print roll unit includes a former in which ink can be stored and print media rolled around the former. The printer further includes a platen and an ink supply unit between which the print media passes during printing. The ink supply unit includes an elongate printhead configured to eject ink onto the print media supported by the platen. An ink distribution manifold defines a print head aperture in which the printhead is received and a series of slots to permit ink to flow to the printhead. A filter is able to engage with the manifold to filter ink. A baffle unit is provided in which the ink distribution manifold and filter are inserted. A housing is provided in which the baffle unit is encased to form a plurality of respective ink chambers connected in fluid communication to receive ink from the former.
Abstract:
A printhead chip suitable for a pagewidth color printhead assembly is provided. The printhead chip comprises a substrate defining a plurality of ink supply channels, and a plurality of ink-ejecting nozzles arranged on the substrate in fluid communication with the ink supply channels. The nozzles are arranged in groups, with each group of nozzles being in fluid communication with a respective ink supply channel. The groups of nozzles are arranged in at least three rows, each row of nozzles receiving ink of the same color.
Abstract:
A printhead integrated circuit (IC) for an inkjet printer, with a plurality of nozzle chamber structures positioned on a wafer substrate to define nozzle chambers and an ink ejection nozzle in fluid communication with each nozzle chamber, has drive control and drive circuitry connectable to data and power supplies, and a plurality of elongate actuators attached to the substrate for displacement towards and away from the substrate in response to actuating signals from the drive control and drive circuitry. A plurality of ink ejection members are attached to respective actuators, each ejection member being positioned for acting on ink within respective nozzle chambers to eject a drop of ink from the ink ejection nozzle. The drive control and drive circuitry has traces between each actuator and the substrate and oriented transverse to a longitudinal axis of each respective actuator.
Abstract:
An ink ejection nozzle comprises a chamber for holding ink to be ejected, the chamber having an opening defined in a roof structure; and a thermal bend actuator for ejecting droplets of ink from the chamber through the opening. The bend actuator is configured as a cantilever with one end of the cantilever anchored to a base and the opposite end supporting a paddle. The actuator has a deflector section constructed of a material having a high coefficient of thermal expansion and a barrier layer constructed of a dielectric material having low thermal conductivity. A supply of current from the drive circuitry to the deflector section causes differential thermal expansion between the deflector section and the barrier layer, such that the actuator bends and the paddle ejects a droplet of ink from the nozzle.
Abstract:
Engineered composite coated flat-rolled steel strip is produced in continuous line operations, in which flat-rolled steel strip, free of surface iron oxide, having a metallic corrosion-protective coating, is polymer coated in continuous-line operations in which a plurality of adherent thin-film layers of polymeric material are deposited on a strip surface. In a dual-surface polymeric coating embodiment, each surface is separately-pretreated for surface adhesion, solidified, and polymeric overhang is removed. Finish processing re-melts the polymer coating and rapidly cools that coating through glass-transition temperature to establish amorphous characteristics in the polymeric coating materials. An anhydride-modified polypropylene, first contacts the strip, an intermediate layer can include about fifteen to twenty five percent, by weight, polybutylene with the balance polypropylene; an outer surface polymeric layer includes about five to ten percent, by weight, polybutylene with the balance polypropylene.
Abstract:
A method of fabricating a plurality of nozzle arrangements for an inkjet printhead chip includes fabricating drive circuitry layers on a substrate with a CMOS fabrication process; depositing a first sacrificial layer on the substrate; depositing a heater layer for forming one or more heating circuits on the first sacrificial layer and etching the heater layer to form the heating circuits; depositing a resiliently flexible layer of dielectric material on the substrate to cover the heater layer and etching the dielectric layer to form one or more actuators and one or more ink ejection members; depositing a second sacrificial layer on the substrate to cover the actuators and the ink ejection members and etching the sacrificial layer to define deposition zones for one or more nozzle chamber walls and one or more roof walls; depositing a layer of a structural material on the second sacrificial layer to form the nozzle chamber walls and the roof walls; and etching away the sacrificial layers.
Abstract:
In a process for the production of a strongly adherent coating on an inorganic or organic substrate, wherein a), a low-temperature plasma treatment, a corona discharge treatment or a flame treatment is carried out on the inorganic or organic substrate, b) one or more photoinitiators or mixtures of photoinitiators with monomers or/and oligomers, containing at least one ethylenically unsaturated group, or solutions, suspensions or emulsions of the afore-mentioned substances, are applied to the inorganic or organic substrate, and optionally, c) using suitable methods those afore-mentioned substances are dried and/or are irradiated with electromagnetic waves, it proves advantageous to use compounds of formula (I), (II), (III) and/or (IV), IN-L-RG (I), >IN-L-RG1-L1-H (II), IN-L-RG1-L1-IN1 (III), IN-L-RG1-L1-RG2-L2-IN1 (IV), wherein IN and IN1 are each independently of the others a monacylphosphine, monoacylphosphine oxide or monoacylphosphine sulfide photoinitiator group; L1 L1 and L2 are a single bond or a spacer group; RG is a monovalent radical having at least one ethylenically unsaturated C═C bond; and RG1 and RG2 are each independently of the other a divalent radical having at least one ethylenically unsaturated C═C bond.