摘要:
A sizing composition comprises a carboxylic acid anhydride and a polyoxyalkylene nonionic surfactant blocked with a lower alkyl, acyl or carbamoyl group and/or an alkaline earth metal salt of a sulphur-containing anionic surfactant. The composition can be easily emulsified to form an aqueous emulsion useful for paper sizing.
摘要:
A method and system for manufacturing a package include: a package-joining belt forming step for forming a package-joining belt (PC) in which packages (P) each containing a material filled in between superposed films and each sealed by joint portions (PA) and a side edge portion (PF) are joined with each other by the joint portions (PA), the package-joining belt forming step including: a superposing process of forming superposed films; a joint portion forming process of forming band-shaped joint portions (PA); a side edge portion forming process of forming band-shaped side edge portion (PF); and a filling process of filling the material; and a scar forming step for forming plural elongate scars (100) each extending adjacent and substantially perpendicularly to the side edge in the side edge portion (PF), wherein the package-joining belt forming step and the scar forming step are carried out, while the package-joining belt is drawn.
摘要:
A high tensile strength hot-rolled steel sheet having superior strain aging hardenability, which has high formability and stable quality characteristics, and in which satisfactory strength is obtained when the steel sheet is formed into automotive components, thus enabling the reduction in weight of automobile bodies is provided. Specifically, a method for producing a high tensile strength hot-rolled steel sheet having superior strain aging hardenability with a BH of 80 MPa or more, a ΔTS of 40 MPa or more, and a tensile strength of 440 MPa or more includes the steps of heating a steel slab to 1,000° C. or more, the steel slab containing, in percent by mass 0.15% or less of C, 2.0% or less of Si, 3.0% or less of Mn, 0.08% or less of P, 0.02% or less of S, 0.02% or less of Al, 0.0050% to 0.0250% of N, and optionally 0.1% or less in total of at least one of more than 0.02% to 0.1% of Nb and more than 0.02% to 0.1% of V, the ratio N (mass %)/Al (mass %) being 0.3 or more, rough-rolling the steel slab to form a sheet bar; finish-rolling the sheet bar at a finishing temperature of 800° C. or more; cooling at a cooling rate of 20° C. to 40° C./s or more within 0.5 second after the finish-rolling; and coiling at a temperature of 650° C. to 450° C. or less.
摘要:
A method and system for manufacturing a package include: a package-joining belt forming step for forming a package-joining belt (PC) in which packages (P) each containing a material filled in between superposed films and each sealed by joint portions (PA) and a side edge portion (PF) are joined with each other by the joint portions (PA), the package-joining belt forming step including: a superposing process of forming superposed films; a joint portion forming process of forming band-shaped joint portions (PA); a side edge portion forming process of forming band-shaped side edge portion (PF); and a filling process of filling the material; and a scar forming step for forming plural elongate scars (100) each extending adjacent and substantially perpendicularly to the side edge in the side edge portion (PF), wherein the package-joining belt forming step and the scar forming step are carried out, while the package-joining belt is drawn.
摘要:
A method for manufacturing a high strength hot rolled steel sheet includes heating a slab to a temperature in the range of 1150 to 1300° C.; hot rolling the slab with a finishing rolling temperature being in the range of 800 to 1000° C.; cooling the steel sheet at a mean cooling rate of 30° C./s or higher to a cooling termination temperature in the range of 525 to 625° C.; suspending cooling for a time period in the range of 3 to 10 seconds; cooling the steel sheet in such a manner that cooling of the steel sheet is nucleate boiling; and coiling the steel sheet at a temperature in the range of 400 to 550° C.
摘要:
A process for surface sizing paper with a surface sizing composition, which comprises a copolymer of acrylic or methacrylic ester, alkali metal salts of acrylic or methacrylic acid, and acrylic or methacrylic acid, or ammonium or lower alkyl amine salts thereof, where substantially no scum forms in the press operation, even after 8 hours.
摘要:
A method for manufacturing a high strength hot rolled steel sheet includes heating a slab to a temperature in the range of 1150 to 1300° C.; hot rolling the slab with a finishing rolling temperature being in the range of 800 to 1000° C.; cooling the steel sheet at a mean cooling rate of 30° C./s or higher to a cooling termination temperature in the range of 525 to 625° C.; suspending cooling for a time period in the range of 3 to 10 seconds; cooling the steel sheet in such a manner that cooling of the steel sheet is nucleate boiling; and coiling the steel sheet at a temperature in the range of 400 to 550° C.
摘要:
A high tensile strength hot-rolled steel sheet having superior strain aging hardenability, which has high formability and stable quality characteristics, and in which satisfactory strength is obtained when the steel sheet is formed into automotive components, thus enabling the reduction in weight of automobile bodies. Specifically, a method for producing a high tensile strength hot-rolled steel sheet having superior strain aging hardenability with a BH of 80 MPa or more, a ΔTS of 40 MPa or more, and a tensile strength of 440 MPa or more includes the steps of heating a steel slab to 1,000° C. or more, the steel slab containing, in percent by mass, 0.15% or less of C, 0.45% or less of Si, 3.0% or less of Mn, 0.08% or less of P, 0.02% or less of S, 0.02% or less of Al, 0.0050% to 0.0250% of N, and optionally 0.1% or less in total of at least one of more than 0.02% to 0.1% of Nb and more than 0.02% to 0.1% of V, the ratio N (mass %)/Al (mass %) being 0.86 or more; rough-rolling the steel slab to form a sheet bar; finish-rolling the sheet bar at a finishing temperature of 800° C. or more; cooling at a cooling rate of 20° C. to 40° C./s or more within 0.5 second after the finish-rolling; and coiling at a temperature of 650° C. to 450° C. or less.
摘要:
A paper surface-sized with a surface sizing composition, which comprises a copolymer of acrylic or methacrylic ester, alkai metal salts of acrylic or methacrylic acid, and acrylic or methacrylic acid, or lower alkyl amine salts thereof.