Abstract:
PROBLEM TO BE SOLVED: To improve productivity of a circuit board by increasing the absorptivity of laser light of a resin film, in a method for manufacturing the circuit board including a step of forming a circuit pattern by irradiating the resin film formed on an insulating substrate surface with laser light.SOLUTION: This resin composition includes: a copolymer composed of a monomer containing a monomer unit having at least one carboxyl group and a monomer capable of copolymerizing with this monomer; and an ultraviolet absorber. In the resin composition, when the absorption coefficient per unit weight of the resin film 2 is ε1 in a solution in which the resin film 2 that is created by applying resin liquid of the resin composition is dissolved by a solvent, ε1 at a wavelength of light with which the resin film 2 is irradiated is 0.01 (L/(g.cm)) or more.
Abstract:
A fiber strand comprising at least one fiber at least partially coated with a composition formed from at least one rosin, at least one cationic lubricant, at least one film forming material, at least one organosilane coupling agent, and at least one dispersion of polymeric particles. A fiber strand comprising at least one fiber at least partially coated with a composition formed from components comprising at least one rosin, at least one polymeric lubricant, at least one film forming material, at least one organosilane coupling agent, and at least one dispersion of polymeric particles. A fiber strand comprising at least one fiber at least partially coated with a starch-free composition comprising at least one rosin, at least one cationic lubricant, at least one film forming material, and at least one organosilane coupling agent. A fiber strand comprising at least one fiber at least partially coated with a starch-free composition comprising at least one rosin, at least one polymeric lubricant, at least one film forming material, and at least one organosilane coupling agent. A fiber strand comprising at least one fiber at least partially coated with a composition comprising at least one rosin, at least one silyated polyamine, at least one film forming material, and at least one organosilane coupling agent. Also provided are fabrics and composite materials comprising at least one of these fiber strands.