公开(公告)号：JPH0912936A

公开(公告)日：1997-01-14

申请号：JP16965195

申请日：1995-07-05

Applicant: KAO CORP

Inventor： OKUMURA MASAHIDE ,  OTSUKA HITOSHI ,  HOSOYA MANABU ,  YOKOYAMA KOJI ,  HARA KATSUTOSHI

IPC: B29B7/80 ,  C09D5/23 ,  C09D7/80 ,  C09D201/00 ,  G11B5/842 ,  C09D7/14

Abstract: PROBLEM TO BE SOLVED: To provide a process for producing a magnetic coating material capable of applying the optimum shearing force to a kneading material and giving a coating material having excellent dispersibility. SOLUTION: In a process for producing a magnetic coating material including a kneading step to knead a magnetic coating material with a continuous twin- screw kneader, the optimum kneading condition in the kneading step is determined in such a manner that the gloss of the magnetic coating film formed of the magnetic coating obtained by kneading the kneading object at prescribed kneading extent and kneading speed based on the kneading energy defined by the following formula becomes the peak value or thereabout. The kneading energy is defined by [(P-Po)×N/Nmax]/F wherein P is the power (KW) in operating state; N is shear rate (sec ); Po is the power (KW) in unloaded state; Nmax is the maximum shear rate (sec ) and F is the treating amount (kg/hr)].

公开(公告)号：JPH0912934A

公开(公告)日：1997-01-14

申请号：JP15933995

申请日：1995-06-26

Applicant: KAO CORP

Inventor： OKUMURA MASAHIDE ,  OTSUKA HITOSHI ,  HOSOYA MANABU ,  HARA KATSUTOSHI ,  YOKOYAMA KOJI

IPC: B29B7/00 ,  C09D5/23 ,  C09D7/80 ,  G11B5/84 ,  C09D7/14

Abstract: PURPOSE: To provide a method for cleaning an apparatus for producing a magnetic coating material, capable of simply cleaning the apparatus. CONSTITUTION: In cleaning a blender for mixing powder with a liquid, useful for the pretreating process of the blending process for a magnetic coating material, the mixture of the powder and liquid is adjusted to 65-75wt.% solid content concentration and thrown into a blending tank of the blender. The mixture is granulated in the blending tank to remove the granulated material.

公开(公告)号：JPH0912933A

公开(公告)日：1997-01-14

申请号：JP15933895

申请日：1995-06-26

Applicant: KAO CORP

Inventor： OKUMURA MASAHIDE ,  OTSUKA HITOSHI ,  HOSOYA MANABU ,  YOKOYAMA KOJI ,  HARA KATSUTOSHI

IPC: B29B7/86 ,  C09D5/23 ,  C09D7/80 ,  G11B5/842 ,  C09D7/14

Abstract: PURPOSE: To obtain a magnetic coating material excellent in dispersibility with out causing bad dispersion. CONSTITUTION: In a method for producing a magnetic coating material including a kneading process for blending the magnetic coating material by using a continuous double screw blender 100, kneading parts 1, 2, 3, 4, 5, 6 and 7 of the blender 100 are evacuated to the vacuum atmosphere of -100 to -10mmHg degree of vacuum to carry out the blending.

公开(公告)号：JPH0912932A

公开(公告)日：1997-01-14

申请号：JP15933795

申请日：1995-06-26

Applicant: KAO CORP

Inventor： OKUMURA MASAHIDE ,  OTSUKA HITOSHI ,  HOSOYA MANABU ,  YOKOYAMA KOJI ,  HARA KATSUTOSHI

IPC: B29B7/82 ,  B01F15/06 ,  C09D5/23 ,  G11B5/842

Abstract: PURPOSE: To obtain a magnetic coating material excellent in dispersibility without causing bad dispersion. CONSTITUTION: In a method for producing a magnetic coating material including a kneading process for blending the magnetic coating material by using a continuous double screw blender 100, kneading parts 1, 2, 3, 4, 5, 6 and 7 of the blender 100 are equipped with heating/cooling apparatuses and the kneading parts 1, 2, 3, 4, 5, 6 and 7 are controlled at 20-50 deg.C.