# US 2014/0197564 A1 · Method for producing fine particles > Agents: this data is available as JSON from the patentgrep API and MCP server — see https://patentgrep.com/llms.txt - Number: US 2014/0197564 A1 - Document ID: US20140197564A1 - Status: Published application - Kind: A1 - Application number: 14/124,818 - Filed: 2012-07-26 - Published: 2014-07-17 - Earliest claimed: 2011-07-26 - Inventors: Masato Tanaka; Takahiro Oomura - Web page: https://patentgrep.com/patent/US20140197564A1 ## CPC - B29B 9/04: in the form of plates or sheets - B23K 26/40: taking account of the properties of the material involved - B23K 2103/16: Composite materials - B23K 2103/42: {Plastics other than composite materials} - B23K 2103/50: {Inorganic materials other than metals or composite materials} - B29B 2009/125: {Micropellets, microgranules, microparticles} - B29B: PREPARATION OR PRETREATMENT OF THE MATERIAL TO BE SHAPED; MAKING GRANULES OR PREFORMS; RECOVERY OF PLASTICS OR OTHER CONSTITUENTS OF WASTE MATERIAL CONTAINING PLASTICS - B23K: SOLDERING OR UNSOLDERING; WELDING; CLADDING OR PLATING BY SOLDERING OR WELDING; CUTTING BY APPLYING HEAT LOCALLY, e.g. FLAME CUTTING; WORKING BY LASER BEAM ## Abstract Provided is a method for producing fine particles in which fine particles having a uniform particle size distribution can be simply obtained with a low environmental load. The present invention relates to a method for producing fine particles including the step of preparing minute pieces by cutting a resin film at equal intervals into a width of 0.05 to 500 μm. ## Claims ### Claim 1 A method for producing fine particles, comprising the step of preparing minute pieces by cutting a resin film at equal intervals into a width of 0.05 to 500 μm. ### Claim 2 (depends on 1) The method for producing fine particles according to claim 1, further comprising the step of melting the minute pieces after the step of preparing minute pieces. ### Claim 3 (depends on 1) The method for producing fine particles according to claim 1, wherein the resin film is obtained by applying a paste containing a polymer to a substrate and drying the paste. ### Claim 4 (depends on 1) The method for producing fine particles according to claim 1, wherein the resin film is obtained by applying a paste containing a polymerizable monomer to a substrate and then performing a polymerization reaction. ### Claim 5 (depends on 1) The method for producing fine particles according to claim 1, wherein the resin film is a composite film having two or more layers. ### Claim 6 (depends on 5) The method for producing fine particles according to claim 5, wherein the composite film is obtained by applying a paste containing a polymerizable monomer to a substrate resin film and then performing a polymerization reaction. ### Claim 7 (depends on 5) The method for producing fine particles according to claim 5, wherein the composite film is obtained by applying a paste containing a polymer to a substrate resin film and drying the paste. ### Claim 8 (depends on 5) The method for producing fine particles according to claim 5, wherein the composite film is obtained by individually preparing two or more layer films and then adhering the layer films to each other. ### Claim 9 (depends on 8) The method for producing fine particles according to claim 8, wherein the composite film is obtained by preparing two or more layer films composed of one or more layer resin films and one or more precursor films containing a polymerizable monomer, adhering the layer films to each other, and then performing a polymerization reaction. ### Claim 10 (depends on 9) The method for producing fine particles according to claim 9, wherein the precursor film is obtained by applying a paste containing a polymer, a polymerizable monomer and an organic solvent and then drying the organic solvent. ### Claim 11 (depends on 9) The method for producing fine particles according to claim 9, wherein the precursor film is obtained by applying a paste containing two different polymerizable monomers and then polymerizing one of the polymerizable monomers. ### Claim 12 (depends on 8) The method for producing fine particles according to claim 8, wherein the composite film is obtained by preparing two or more layer films composed of one or more layer resin films and one or more solvent-containing films containing an organic solvent, adhering the layer films to each other and then drying the layer films. ### Claim 13 (depends on 12) The method for producing fine particles according to claim 12, wherein the solvent-containing film is obtained by applying a paste containing a polymerizable monomer and an organic solvent and then performing a polymerization reaction. ### Claim 14 (depends on 1) The method for producing fine particles according to claim 1, wherein a core material is disposed at equal intervals on the resin film. ### Claim 15 (depends on 5) The method for producing fine particles according to claim 5, wherein the composite film includes a core material disposed at equal intervals between the layers. ### Claim 16 (depends on 14) The method for producing fine particles according to claim 14, wherein the resin film is cut so as to have the core material positioned in a center of each of the minute pieces.