Abstract: Provided is an oxidized microfibrillated cellulose fiber having a Canada standard freeness of less than 200 mL and an average fiber diameter of not less than 500 nm. Said fiber provides a composition having excellent water retention ability.

Abstract: Provided is an oxidized microfibrillated cellulose fiber having a Canada standard freeness of not less than 200 mL and an average fiber diameter of not less than 500 nm. Said fiber enhances paper strength when added to a paper.

Abstract: Provided is a CM-modified microfibrillated cellulose fiber having a Canada standard freeness of not less than 200 mL and an average fiber diameter of not less than 500 nm. Said fiber enhances paper strength when added to a paper.

Abstract: Provided is a carboxymethylated microfibrillated cellulose fiber having a Canada standard freeness of less than 200 mL and an average fiber diameter of not less than 500 nm. Said fiber provides a composition having excellent water retention ability.

Abstract: Provided is a CM-modified microfibrillated cellulose fiber having a Canada standard freeness of not less than 200 mL and an average fiber diameter of not less than 500 nm. Said fiber enhances paper strength when added to a paper.

Abstract: Provided is an oxidized microfibrillated cellulose fiber having a Canada standard freeness of less than 200 mL and an average fiber diameter of not less than 500 nm. Said fiber provides a composition having excellent water retention ability.

Abstract: Provided is an oxidized microfibrillated cellulose fiber having a Canada standard freeness of not less than 200 mL and an average fiber diameter of not less than 500 nm. Said fiber enhances paper strength when added to a paper.

Abstract: Provided is a carboxymethylated microfibrillated cellulose fiber having a Canada standard freeness of less than 200 mL and an average fiber diameter of not less than 500 nm. Said fiber provides a composition having excellent water retention ability.

Abstract: The present invention aims to provide a technique for easily and rapidly sorting printed materials suitable as raw materials of recycled paper. Printed materials that are hard to recycle as waste paper can be identified by irradiating the surface of the printed materials with light and measuring the reflected light. Specifically, good quality recycled paper can be made efficiently from printed materials by removing printed materials having an absorption band around 1720 cm?1, around 1260 cm?1, around 1160 cm?1, or around 700 cm?1 from waste paper raw materials when the printed materials are irradiated with light on their surface.

Abstract: An inkjet recording medium, comprising an ink-receiving layer containing a pigment, a binder and an inkjet ink-fixing agent comprising a cationic compound disposed on at least one surface of a base paper, wherein 50% or more by weight of calcium carbonate is contained in terms of a solid content based on a total amount of the pigment contained in the ink-receiving layer; 75 to 90 parts by weight of the pigment, 1 to 10 parts by weight of the binder and 5 to 20 parts by weight of the inkjet ink-fixing agent are contained based on 100 parts by weight of the ink-receiving layer; the drop water absorbency of the ink-receiving layer (according to the drop water absorbency defined in Japan Technical Association of the Pulp and Paper Industry, J. TAPPI, No. 32-2:2000 except that a drop water amount is 0.001 ml) is 200 seconds or less; and a Stockigt sizing degree according to JIS-P-8122 for the inkjet recording medium is 5 seconds or less.

Abstract: An inkjet recording medium, comprising an ink-receiving layer containing a pigment, a binder and an inkjet ink-fixing agent comprising a cationic compound disposed on at least one surface of a base paper, wherein 50% or more by weight of calcium carbonate is contained in terms of a solid content based on a total amount of the pigment contained in the ink-receiving layer; 75 to 90 parts by weight of the pigment, 1 to 10 parts by weight of the binder and 5 to 20 parts by weight of the inkjet ink-fixing agent are contained based on 100 parts by weight of the ink-receiving layer; the drop water absorbency of the ink-receiving layer (according to the drop water absorbency defined in Japan Technical Association of the Pulp and Paper Industry, J. TAPPI, No. 32-2:2000 except that a drop water amount is 0.001 ml) is 200 seconds or less; and a Stockigt sizing degree according to WS-P-8122 for the inkjet recording medium is 5 seconds or less.

Abstract: A thermally sensitive recording medium including on a support a thermally sensitive color development layer containing: a compound represented by the following general formula (1) as an organic color developing agent; and an oxalate compound represented by the following general formula (2) as a sensitizer. (In the formula (1): M represents CO or NRCO; when M is CO, m1 is 1; and when m1 is 0 and M is NRCO, B is not 0.

Abstract: The present invention is the thermally sensitive recording medium comprising a thermally sensitive color developing layer containing colorless or pale colored basic leuco dye and a color developing agent as a main components on a substrate, wherein said thermally sensitive recording layer contains acrylic emulsion and colloidal silica, further contains at least one kind of diphenylsulfone bridgeable compound represented by general formula A as the color developing agent, wherein, X and Y can be different or same and indicates a saturated or an unsaturated liner or grafted hydrocarbon group of carbon number 1–12 which can possess an ether bond, or indicate, wherein, R indicates a methylene group or an ethylene group, T indicates a hydrogen atom or an alkyl group of carbon number 1–4, and R1–R6 independently indicate a halogen-atom, an alkyl group of carbon number 1–6, or an alkenyl group, further, m, n, p, q, r, t indicate an integer number of 0–4 and when are bigger than 2, R1–R6 can be different, an

Abstract: A thermally sensitive recording medium including on a support a thermally sensitive color development layer containing: a compound represented by the following general formula (1) as an organic color developing agent; and an oxalate compound represented by the following general formula (2) as a sensitizer. (In the formula (1): M represents CO or NRCO; when M is CO, m1 is 1; and when m1 is 0 and M is NRCO, B is not 0.

Abstract: The present invention is the thermally sensitive recording medium comprising a thermally sensitive color developing layer containing colorless or pale colored basic leuco dye and a color developing agent as a main components on a substrate, wherein said thermally sensitive recording layer contains acrylic emulsion and colloidal silica, further contains at least one kind of diphenylsulfone bridgeable compound represented by general formula A as the color developing agent, wherein, X and Y can be different or same and indicates a saturated or an unsaturated liner or grafted hydrocarbon group of carbon number 1-12 which can possess an ether bond, or indicate, wherein, R indicates a methylene group or an ethylene group, T indicates a hydrogen atom or an alkyl group of carbon number 1-4, and R1-R6 independently indicate a halogen-atom, an alkyl group of carbon number 1-6, or an alkenyl group, further, m, n, p, q, r, t indicate an integer number of 0-4 and when are bigger than 2, R1-R6 can be different, a

Abstract: Recyclable light proof and moisture proof papers with excellent moisture proofness and light proofness and especially with excellent repulpability during waste paper recovery are provided, which have a single repulpable and recyclable light proof and moisture proof layer on at least one side of a base paper using neither aluminium foil nor an aluminium deposited film, wherein said light proof and moisture proof layer contains 3-70 parts by weight (solids) of a light proof agent and 1-10 parts by weight (solids) of a wax per 100 parts by weight (solids) of a synthetic resin having a gel fraction of 90% or more.