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US 2024/0408796 A1Published application
Process for grinding materials
AssigneeInternational Fine Chemistry, LLC
InventorStanley V. MARTIN
Life of this patent
Estimating the term…
Abstract
A process for grinding materials includes grinding a frozen plastic material to form a first-stage plastic material in a first mill. The first-stage plastic material is processed in a second mill to form material having a particle size less than about 100 μm.
Claims20
A process for grinding materials, the process comprising,
- freezing a plastic material having a particle size of at least 300 μm to form a frozen plastic material,
- grinding the frozen plastic material in a first mill to form first-stage plastic material having a particle size of less than 300 μm, and
- grinding the first-stage plastic material in a second mill to form a second-stage plastic material having a particle size less than about 100 μm,
- wherein the first-stage plastic material is not refrozen prior to the step of grinding the first-stage plastic material in the second mill.
1 more element
A process for grinding materials, the process comprising,
- freezing a plastic material having a first particle size to form a frozen plastic material at a first temperature,
- grinding the frozen plastic material in a first mill to form first-stage plastic material having a second particle size less than the first particle size, the first-stage plastic material having a second temperature greater than the first temperature, and
- grinding the first-stage plastic material in a second mill to form a second-stage plastic material having a particle size less than about 100 μm,
- wherein, prior to and during the step of grinding the first-stage plastic material, the first stage plastic material has a third temperature greater than or equal to the second temperature.
1 more element
A process for grinding materials, the process comprising,
- freezing a plastic material having a first particle size to form a frozen plastic material at a first temperature,
- grinding the frozen plastic material in a first mill to form first-stage plastic material having a second particle size less than the first particle size, the first-stage plastic material having a second temperature greater than the first temperature, and
- grinding the first-stage plastic material in a second mill to form a second-stage plastic material having a particle size less than about 100 μm,
- wherein the first mill is enclosed and liquid nitrogen is introduced to the plastic material to form the frozen plastic material before or in the first mill, and the second mill includes one or more openings such that the second mill is not suitable for use with liquid nitrogen and the first stage plastic material is not refrozen in the second mill.
1 more element
Dependencies are inferred from the claim text.