# US 10,767,035 B2 · Method for producing thermoplastic resin composition film > Agents: this data is available as JSON from the patentgrep API and MCP server — see https://patentgrep.com/llms.txt - Number: US 10,767,035 B2 - Document ID: US10767035B2 - Status: Granted - Kind: B2 - Application number: 15/517,927 - Filed: 2015-09-11 - Published: 2017-10-26 - Granted: 2020-09-08 - Earliest claimed: 2014-10-09 - Assignees: Riken Technos Corporation - Applicants: Riken Technos Corporation - Inventors: Tomohiro Takahashi; Hidemasa Sugimoto - Web page: https://patentgrep.com/patent/US10767035B2 ## CPC - C08L 23/04: Homopolymers or copolymers of ethene - B29C 43/24: Calendering - B29C 43/52: Heating or cooling - B32B 9/007: {comprising carbon, e.g. graphite, composite carbon} - B32B 9/045: {of synthetic resin} - C08J 5/18: Manufacture of films or sheets - C08K 3/04: Carbon - C08K 3/041: {Carbon nanotubes} - C08L 23/06: Polyethylene - C08L 23/286: Chlorinated polyethylene - B29K 2105/0047: {Agents changing thermal characteristics} - B29L 2031/3468: {Batteries, accumulators or fuel cells (battery cases B29L2031/7146)} - C08J 2323/06: Polyethene - C08J 2323/28: by reaction with halogens or halogen-containing compounds (C08J2323/32 takes precedence) - C08L 2205/02: containing two or more polymers of the same C08L -group - Y02E 60/10: Energy storage using batteries - C08L: COMPOSITIONS OF MACROMOLECULAR COMPOUNDS (compositions based on polymerisable monomers C08F, C08G; artificial filaments or fibres D01F; textile treating compositions D06) - B29C: SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING (making preforms B29B11/00; making laminated products by combining previously unconnected layers which become one product whose layers will remain together B32B37/00 - B32B41/00) - B32B: LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM - C08J: WORKING-UP; GENERAL PROCESSES OF COMPOUNDING; AFTER-TREATMENT NOT COVERED BY SUBCLASSES C08B, C08C, C08F, C08G or C08H (working, e.g. shaping, of plastics B29) - C08K: Use of inorganic or non-macromolecular organic substances as compounding ingredients (paints, inks, varnishes, dyes, polishes, adhesives C09) - B29K: INDEXING SCHEME ASSOCIATED WITH SUBCLASSES B29B, B29C OR B29D, RELATING TO MOULDING MATERIALS OR TO MATERIALS FOR {MOULDS, } REINFORCEMENTS, FILLERS OR PREFORMED PARTS, e.g. INSERTS - B29L: INDEXING SCHEME ASSOCIATED WITH SUBCLASS B29C, RELATING TO PARTICULAR ARTICLES - Y02E: REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION ## Abstract Embodiments provide a method for producing a film including a thermoplastic resin composition, the method including: (1) a step of subjecting a thermoplastic resin composition to preliminary heating at 100-250° C.; (2) a step of subjecting a first roller and second roller of a calender roll film-forming apparatus to pre-heating; and (3) a step of introducing the thermoplastic resin composition, which has been subjected to preliminary heating in step (1), into the clearance between the first roller and second roller, which have been pre-heated in step (2), and continuously winding a molten film of the thermoplastic resin composition on the first roller. According to at least one embodiment, the rotational speed of the first roller is higher than the rotational speed of the second roller. According to at least one embodiment, the thermoplastic resin composition contains (A) 100 parts by mass of a thermoplastic resin, (B) 1-60 parts by mass of carbon nanotubes and (C) 1-100 parts by mass of at least one type of material selected from the group consisting of acetylene black and graphite. ## Claims ### Claim 1 A method for producing a film comprising a thermoplastic resin composition, the method comprising: (1) a step of subjecting a thermoplastic resin composition to preliminary heating at 100 to less than 190° C.; (2) a step of subjecting a first roller and second roller of a calender-roll film-forming apparatus to pre-heating at 100 to 190° C. for each of the first and second rollers; and (3) a step of introducing the thermoplastic resin composition, which has been subjected to preliminary heating in step (1), into a clearance between the first roller and second roller, which have been pre-heated in step (2), and continuously winding a melted film of the thermoplastic resin composition on the first roller, wherein a rotation rate of the first roller is faster than a rotation rate of the second roller, and wherein a ratio of the speed of the first roller to the speed of the second roller ranges from 1.3:1 to 3:1, which is kept at a constant ratio during the production of the film. ### Claim 2 (depends on 1) The method according to claim 1, further comprising: (4) a step of, on the first roller, continuously trimming both sides of the melted film and then continuously peeling the melted film off from the first roller. ### Claim 3 (depends on 1) The method according to claim 1, wherein the thermoplastic resin composition comprises: (A) 100 parts by mass of the thermoplastic resin; (B) 1 to 60 parts by mass of carbon nanotubes; and (C) 1 to 100 parts by mass of at least one selected from the group consisting of acetylene black and graphite. ### Claim 4 (depends on 3) The method according to claim 3, wherein the thermoplastic resin (A) is a resin mixture comprising: (A1) 30 to 80% by mass of a chlorinated polyethylene having a chlorine content of 20 to 45% by mass; and (A2) 70 to 20% by mass of a polyethylene other than (A1), wherein the sum of (A1) and (A2) is 100% by mass. ### Claim 5 (depends on 4) The method according to claim 4, wherein the highest melting point among peak top melting points in a DSC melting curve of component (A2) is 110° C. or lower. ### Claim 6 (depends on 4) The method according to claim 4, wherein component (A1) is amorphous. ### Claim 7 (depends on 3) The method according to claim 3, wherein the thermoplastic resin (A) is (A3) a polyethylene satisfying the following properties (p) and (q): (p) the highest melting point among peak top melting points in a DSC melting curve is 120° C. or higher; and (q) a fraction of melting enthalpy in a temperature range of 110° C. or lower relative to the total melting enthalpy in a DSC melting curve is 50 to 80%. ### Claim 8 (depends on 1) The method according to claim 1, wherein the thermoplastic resin composition comprises: (A) 100 parts by mass of the thermoplastic resin; and (D) 100 to 400 parts by mass of a bentonite. ### Claim 9 (depends on 1) The method according to claim 1, wherein the thermoplastic resin composition comprises: (A) 100 parts by mass of the thermoplastic resin; and (E) 50 to 300 parts by mass of at least one selected from the group consisting of zeolite, silver zeolite, and copper zeolite. ### Claim 10 (depends on 3) A film produced by the method according to claim 3. ### Claim 11 (depends on 8) A film produced by the method according to claim 8. ### Claim 12 (depends on 10) A battery comprising the film according to claim 10. ### Claim 13 (depends on 4) A film produced by the method according to claim 4. ### Claim 14 (depends on 5) A film produced by the method according to claim 5. ### Claim 15 (depends on 6) A film produced by the method according to claim 6. ### Claim 16 (depends on 7) A film produced by the method according to claim 7. ### Claim 17 (depends on 9) A film produced by the method according to claim 9. ### Claim 18 (depends on 1) The method according to claim 1, wherein a temperature of the first roller is higher than a temperature of the second roller.