JP2020183053A5 - - Google Patents

Description

Next, a method for producing a cleaning agent for a molding machine according to the present invention will be described.
According to the present invention, a cleaning agent for a molding machine, wherein the outer surface of the resin granules is coated with a cleaning component.
The liquid material of the cleaning component is added to the aggregate of the resin granules so that an effective amount of less than 0.01 parts by weight of the cleaning component is contained in 100 parts by weight of the resin granules, and both are mixed. It is subjected to a mixing step of stirring.
The liquid form of the cleaning component is a solution or suspension of the cleaning component. As the solution of the cleaning component, a solvent in which the cleaning component can be dissolved can be used, but when the cleaning component is a fluororesin, it is preferable to use a fluorine-based solvent. Specific examples of the fluorine-based solvent include _hydrofluoroolefins and the like. Further, it is preferable to use an aqueous medium as the suspension of the cleaning component. As the solution or suspension of the cleaning component, a solution or suspension having a cleaning component of 0.5 to 40%, preferably 1 to 10% can be adopted.
In the mixing / stirring treatment in the mixing step, both are mixed in a container capable of contacting the resin granular material aggregate and the liquid material of the cleaning component which is usually liquid, and the resin granular material is on the outer surface. The stirring treatment is performed under non-heating conditions until the coating layer of the cleaning component is formed, for example, at room temperature, and the mixing / stirring treatment is continued until the coating layer of the cleaning component is formed.
The mixing / stirring treatment in the mixing step can be performed in an appropriate container by using an appropriate means such as a mixer for the resin granules and the cleaning component liquid material.
After the mixing / stirring treatment, the wet cleaning agent coated with the cleaning component is subjected to a drying step, if necessary, and can be subjected to a drying treatment.
The drying treatment may be carried out under conditions in which the cleaning component is firmly fixed to the resin granules and can be prevented from falling off, but the drying temperature is 20 to 50 ° C., preferably 25 to 45 ° C., more preferably 25 to 45 ° C. The range of 30 to 40 ° C. can be adopted.
By such a drying treatment, it is possible to fix the cleaning component as an additional component adhered to the foot layer of the cleaning component in a wet state. In the drying step, a drying time of 1 to 10 hours, preferably 1.5 to 3 hours can be adopted depending on the degree of wetness of the coating layer of the cleaning agent obtained in the mixing step.

Claims (11)

A cleaning agent for a molding machine, which comprises a resin granular material and a cleaning component coated on the outer surface of the resin granular material.
The critical surface tension of the cleaning component is 22 dyne / cm or less.
A cleaning agent for a molding machine, wherein the content of the cleaning component is an effective amount of less than 0.01 parts by weight with respect to 100 parts by weight of the resin granules. The molding according to claim 1, wherein an additional component, which is normally a powder or a granular material and contains a cleaning component having a critical surface tension of 22 dyne / cm or less, is further adhered to the coating layer of the cleaning component. Machine cleaning agent. The cleaning agent for a molding machine according to claim 1, wherein the resin granules are particle aggregates having an average particle diameter of 0.5 to 10 mm. The cleaning agent for a molding machine according to claim 1, wherein the critical surface tension of the cleaning component is 21 dyne / cm or less. The cleaning agent for a molding machine according to claim 2, wherein the powdery or granular cleaning component has a particle size of 1 to 80 μm. The cleaning agent for a molding machine according to any one of claims 1, 2, 4 or 5, wherein the cleaning component is a fluororesin and / or a silicon resin. A method for producing a cleaning agent for a molding machine, wherein the outer surface of the resin granules is coated with a cleaning component.
With the resin granules
The added liquid material of the cleaning component is added to the mixing step so that 100 parts by weight of the resin granule contains an effective amount of less than 0.01 part by weight of the cleaning component having a critical surface tension of 22 dyne / cm or less. A method for producing a cleaning agent for a molding machine, which comprises contacting the resin granules with the cleaning components at room temperature for a sufficient time until the outer surface of the resin granules is coated with the cleaning components. In the mixing step, an adhesion step is further added in which an additional component containing a powdery or granular cleaning component is normally attached onto the wet coating layer of the obtained molding machine cleaning agent. The method for producing a cleaning agent for a molding machine according to claim 7. The method for producing a cleaning agent for a molding machine according to claim 7 or 8, further comprising a drying step. The method for producing a cleaning agent for a molding machine according to claim 7 or 8, wherein the cleaning component is a fluororesin and / or a silicon resin. A method for cleaning a molding machine, which comprises using the cleaning agent for a molding machine according to any one of claims 1 to 6.