摘要:
PROBLEM TO BE SOLVED: To provide a size property expression accelerator aid accelerating a size effect expression of an alkyl ketene dimer, and to provide an AKD-based sizing agent for paper manufacturing, capable of shortening a time till the size effect expression which is regarded as a problem in conventional AKD-based sizing agents, and expressing size effects in wide paper-making conditions in neutral to acidic region.SOLUTION: A size property expression accelerator aid (A) containing at least one compound selected from a group consisting of (I) a carboxyl group-containing amide compound obtained by reacting (i) divalent or tetravalent polybasic carboxylic acid and (ii-1) primary and/or secondary aliphatic amine having 12 to 22 carbon atoms, (II) a carboxyl group-containing ester compound obtained by reacting (i) divalent or tetravalent polybasic carboxylic acid and (ii-2) aliphatic alcohol having 12 to 22 carbon atoms and (III) salts thereof is simultaneously used with an alkyl ketene dimer-based sizing agent for paper manufacturing.
摘要:
PROBLEM TO BE SOLVED: To provide a method for producing a well-sized paperboard capable of avoiding both the scale-related troubles and pitch-related troubles in a papermaking system, and suppressed in sizing agent-derived stain development.SOLUTION: The method includes the following steps: to pulp slurry with a pH of 6.5-8.5, a sizing agent composition obtained by emulsifying a mixture comprising 60-95 mass% of an alkenylsuccinic acid anhydride liquid at 25°C, and 5-40 mass% of a 2-oxetanone compound liquid at 25°C are added, and a papermaking operation is then carried out.
摘要:
PROBLEM TO BE SOLVED: To provide a newsprint for offset printing which has sufficient sizing properties and hardly causing color shift even when multicolor printing is carried out. SOLUTION: The newsprint for the offset printing has a water resistant tensile strength of not less than 3.5 s, and a surface-treating agent coated on both surfaces of base paper. The surface-treating agent includes an adhesive, an alkylketene dimer-based surface-sizing agent, and a polymer-based surface-sizing agent. The newsprint can prevent color shift in printing because the water resistant tensile strength representing sizing properties and tensile characteristics, is high, can prevent wrinkling, paper break or the like caused by slippage and paper shift in printing, which becomes problems when the alkylketene dimer-based surface sizing agent is used, and also can prevent the occurrence of piling in printing. COPYRIGHT: (C)2010,JPO&INPIT