CN112940539A - Preparation process of powder for pearlized film - Google Patents
Preparation process of powder for pearlized film Download PDFInfo
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- CN112940539A CN112940539A CN202110159191.6A CN202110159191A CN112940539A CN 112940539 A CN112940539 A CN 112940539A CN 202110159191 A CN202110159191 A CN 202110159191A CN 112940539 A CN112940539 A CN 112940539A
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- powder
- calcium carbonate
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- superfine
- feeding
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- C—CHEMISTRY; METALLURGY
- C09—DYES; PAINTS; POLISHES; NATURAL RESINS; ADHESIVES; COMPOSITIONS NOT OTHERWISE PROVIDED FOR; APPLICATIONS OF MATERIALS NOT OTHERWISE PROVIDED FOR
- C09C—TREATMENT OF INORGANIC MATERIALS, OTHER THAN FIBROUS FILLERS, TO ENHANCE THEIR PIGMENTING OR FILLING PROPERTIES ; PREPARATION OF CARBON BLACK ; PREPARATION OF INORGANIC MATERIALS WHICH ARE NO SINGLE CHEMICAL COMPOUNDS AND WHICH ARE MAINLY USED AS PIGMENTS OR FILLERS
- C09C1/00—Treatment of specific inorganic materials other than fibrous fillers; Preparation of carbon black
- C09C1/02—Compounds of alkaline earth metals or magnesium
- C09C1/021—Calcium carbonates
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- C—CHEMISTRY; METALLURGY
- C09—DYES; PAINTS; POLISHES; NATURAL RESINS; ADHESIVES; COMPOSITIONS NOT OTHERWISE PROVIDED FOR; APPLICATIONS OF MATERIALS NOT OTHERWISE PROVIDED FOR
- C09C—TREATMENT OF INORGANIC MATERIALS, OTHER THAN FIBROUS FILLERS, TO ENHANCE THEIR PIGMENTING OR FILLING PROPERTIES ; PREPARATION OF CARBON BLACK ; PREPARATION OF INORGANIC MATERIALS WHICH ARE NO SINGLE CHEMICAL COMPOUNDS AND WHICH ARE MAINLY USED AS PIGMENTS OR FILLERS
- C09C3/00—Treatment in general of inorganic materials, other than fibrous fillers, to enhance their pigmenting or filling properties
- C09C3/006—Combinations of treatments provided for in groups C09C3/04 - C09C3/12
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- C—CHEMISTRY; METALLURGY
- C09—DYES; PAINTS; POLISHES; NATURAL RESINS; ADHESIVES; COMPOSITIONS NOT OTHERWISE PROVIDED FOR; APPLICATIONS OF MATERIALS NOT OTHERWISE PROVIDED FOR
- C09C—TREATMENT OF INORGANIC MATERIALS, OTHER THAN FIBROUS FILLERS, TO ENHANCE THEIR PIGMENTING OR FILLING PROPERTIES ; PREPARATION OF CARBON BLACK ; PREPARATION OF INORGANIC MATERIALS WHICH ARE NO SINGLE CHEMICAL COMPOUNDS AND WHICH ARE MAINLY USED AS PIGMENTS OR FILLERS
- C09C3/00—Treatment in general of inorganic materials, other than fibrous fillers, to enhance their pigmenting or filling properties
- C09C3/04—Physical treatment, e.g. grinding, treatment with ultrasonic vibrations
- C09C3/041—Grinding
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- C—CHEMISTRY; METALLURGY
- C09—DYES; PAINTS; POLISHES; NATURAL RESINS; ADHESIVES; COMPOSITIONS NOT OTHERWISE PROVIDED FOR; APPLICATIONS OF MATERIALS NOT OTHERWISE PROVIDED FOR
- C09C—TREATMENT OF INORGANIC MATERIALS, OTHER THAN FIBROUS FILLERS, TO ENHANCE THEIR PIGMENTING OR FILLING PROPERTIES ; PREPARATION OF CARBON BLACK ; PREPARATION OF INORGANIC MATERIALS WHICH ARE NO SINGLE CHEMICAL COMPOUNDS AND WHICH ARE MAINLY USED AS PIGMENTS OR FILLERS
- C09C3/00—Treatment in general of inorganic materials, other than fibrous fillers, to enhance their pigmenting or filling properties
- C09C3/08—Treatment with low-molecular-weight non-polymer organic compounds
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- C—CHEMISTRY; METALLURGY
- C01—INORGANIC CHEMISTRY
- C01P—INDEXING SCHEME RELATING TO STRUCTURAL AND PHYSICAL ASPECTS OF SOLID INORGANIC COMPOUNDS
- C01P2004/00—Particle morphology
- C01P2004/60—Particles characterised by their size
- C01P2004/61—Micrometer sized, i.e. from 1-100 micrometer
Abstract
The invention provides a preparation process of powder for a pearlized film, which comprises the steps of crushing and grinding calcium carbonate raw ore to obtain ground powder, sending the ground powder into an ATR + ATP combined superfine grinding grading system to obtain superfine raw powder, sending the superfine raw powder into a modification host machine, and coating and modifying the superfine raw powder with a surface modifier, wherein the moisture in the superfine raw powder is quickly evaporated (flash evaporation) in a high-temperature hot air environment, the superfine raw powder and the surface modifier are quickly melted to fully contact with the superfine raw powder in a turbulent flow formed by interweaving an upper pressure air flow and a lower high-temperature hot air flow, so that the coating and modifying effects are good, and the prepared powder for the pearlized film has small particle size, controllable particle size, precise particle size and excellent processing performance and mechanical performance.
Description
[ technical field ] A method for producing a semiconductor device
The invention relates to the technical field of master batch fillers, in particular to a preparation process of powder for a pearlized film.
[ background of the invention ]
The pearlized film has silk texture, soft and beautiful pearl luster, low density, excellent smoothness and gas barrier property, can be widely applied to direct packaging of dry fruits, ice cream, candies, high-grade soap, gifts and the like, and is one of the popular packaging materials. In recent years, pearlescent films have also been widely used in the automotive industry.
The pearlized film is prepared by mixing polypropylene resin as raw material, calcium carbonate and pearlescent pigment, and stretching in two directions. It adopts mechanical foaming method, and has low cost, good decorative effect and excellent performance.
At present, along with the increasing requirements of the market on the quality of a pearlized film, the requirements on high-end pearlized master batches are also increasing, so the requirement on the fineness of the pearlized master batches needs to reach a higher level, and the pearlized master batches meeting the requirements in the market are seriously lack.
In response to the above problems, we developed a new production process.
[ summary of the invention ]
The invention aims to overcome the defects of the prior art and provides a preparation process of powder for a pearlized film.
In order to solve the technical problems, the invention adopts the following technical scheme:
a preparation process of powder for a pearlized film comprises the following process steps:
s1, taking calcium carbonate raw ore, and crushing the calcium carbonate raw ore by a crusher to obtain calcium carbonate sand powder, wherein the fineness of the calcium carbonate sand powder is 10-15 mm;
s2, uniformly and quantitatively feeding the calcium carbonate sand powder into a calcium carbonate grinding mill for grinding, and collecting the powder through cyclone to obtain calcium carbonate coarse powder, wherein the fineness of the calcium carbonate coarse powder is 200 meshes;
s3, feeding the calcium carbonate coarse powder into a dry vertical stirring ball mill for grinding, and adjusting the proportion of the calcium carbonate coarse powder to the grinding beads to ensure that the calcium carbonate coarse powder is filled in gaps among the grinding beads;
s4, screening the grinding beads after grinding is finished to obtain grinding powder;
s5, feeding the ground powder into a turbine airflow classifier, separating coarse powder from fine powder in the turbine airflow classifier, and feeding fine particles meeting the particle size requirement into a cyclone separator or a dust remover through gaps among blades of a classifying wheel;
s6, obtaining superfine raw powder after cyclone dust collection, wherein the fineness of the superfine raw powder is 2 UM: 75 percent;
s7, feeding superfine raw powder into a modification host, introducing high-temperature hot air into the bottom of the modification host, forming a downward-pressing air flow at the upper end of the modification host, and feeding a surface modifier into the modification host, wherein the superfine raw powder and the surface modifier are coated and modified under the interweaving of the upper downward-pressing air flow and the lower high-temperature hot air flow in a high-temperature hot air environment, the modification time is controlled by a system, and the temperature of the high-temperature hot air is 105-125 ℃;
and S8, after homogenization, sending the homogenized powder into dust collection equipment for dust collection, wherein the powder obtained after dust collection is the powder for the pearlized film.
In a further refinement, in step S3, the grain size of the beads is 3 mm.
In a further modification, in step S7, the coating amount of the surface modifier is 1.9 to 2.0%.
In a further improvement, in step S8, the obtained powder for a pearlescent film has a particle diameter D50 of 1.0-1.4 μm, D97 of 3.0-4.0 μm and D100 of 5-7 μm.
In a further modification, in step S7, the surface modifier is a secondary pressed plant-grade stearic acid.
Compared with the prior art, the invention has the beneficial effects that: the method comprises the steps of crushing and grinding calcium carbonate raw ore to obtain grinding powder, then conveying the grinding powder into an ATR + ATP combined superfine grinding and grading system for superfine grinding and superfine grading to obtain superfine raw powder, conveying the superfine raw powder into a modification host machine, and performing coating modification with a surface modifier, wherein moisture contained in the superfine raw powder is quickly evaporated (flash evaporated) in a high-temperature hot air environment, and the superfine raw powder and the surface modifier are quickly melted to fully contact with the superfine raw powder to complete the coating modification in a turbulent flow formed by interweaving an upper pressure air flow and a lower high-temperature hot air flow, so that the modification homogenization effect is good, and the prepared powder for the light film beads is small in particle size, controllable in particle size, accurate in particle size and excellent in processability and mechanical performance.
[ detailed description ] embodiments
To better illustrate the objects, aspects and advantages of the present invention, the present invention will be further described with reference to specific examples.
A preparation process of powder for a pearlized film comprises the following process steps:
s1, taking calcium carbonate raw ore, and crushing the calcium carbonate raw ore by a crusher to obtain calcium carbonate sand powder, wherein the fineness of the calcium carbonate sand powder is 10-15 mm;
s2, uniformly and quantitatively feeding the calcium carbonate sand powder into a calcium carbonate grinding mill for grinding, and collecting the powder through cyclone to obtain calcium carbonate coarse powder, wherein the fineness of the calcium carbonate coarse powder is 200 meshes;
s3, feeding the coarse calcium carbonate powder into a dry vertical agitator ball mill (ATR) for grinding, and adjusting the proportion of the coarse calcium carbonate powder to the grinding beads to ensure that the gaps among the grinding beads are filled with the coarse calcium carbonate powder, wherein the grinding time and speed are automatically controlled by the system;
s4, screening the grinding beads after grinding is finished to obtain grinding powder;
s5, feeding the ground powder into a turbine airflow classifier (ATP), separating coarse powder from fine powder in the ATP, and feeding fine particles meeting the particle size requirement into a cyclone separator or a dust remover through gaps among blades of a classifying wheel;
s6, obtaining superfine raw powder after cyclone dust collection, wherein the fineness of the superfine raw powder is 2 UM: 75 percent;
s7, feeding superfine raw powder into a modification host, introducing high-temperature hot air into the bottom of the modification host, forming a downward-pressing air flow at the upper end of the modification host, and feeding a surface modifier into the modification host, wherein the superfine raw powder and the surface modifier are coated and modified under the interweaving of the upper downward-pressing air flow and the lower high-temperature hot air flow in a high-temperature hot air environment, the modification time is controlled by a system, and the temperature of the high-temperature hot air is 105-125 ℃;
and S8, after homogenization, sending the homogenized powder into dust collection equipment for dust collection, wherein the powder obtained after dust collection is the powder for the pearlized film.
In a further modification, in step S3, the mass of the beads and the calcium carbonate coarse powder in the dry-process vertical agitator ball mill is determined according to the host current, and the particle size of the beads is 3 mm.
In a further modification, in step S7, the coating amount of the surface modifier is 1.9 to 2.0%.
In a further improvement, in step S8, the obtained powder for a pearlescent film has a particle diameter D50 of 1.0-1.4 μm, D97 of 3.0-4.0 μm and D100 of 5-7 μm.
In a further modification, in step S7, the surface modifier is a secondary pressed plant-grade stearic acid.
Test detection
The prepared powder for the pearlized film is detected, and the specific detection results are as follows:
the method comprises the steps of crushing and grinding calcium carbonate raw ore to obtain grinding powder (or directly purchasing the grinding powder meeting the fineness requirement), then sending the grinding powder into an ATR + ATP combined superfine grinding and grading system for superfine grinding and superfine grading to obtain superfine raw powder, then sending the superfine raw powder into a modification host machine for coating modification with a surface modifier, wherein the moisture contained in the superfine raw powder is quickly evaporated (flash evaporation) in a high-temperature hot air environment, the superfine raw powder and the surface modifier are quickly melted to fully contact with the superfine raw powder in a turbulent flow formed by interweaving an upper pressure air flow, a lower pressure air flow and a lower high-temperature hot air flow, so that the coating modification is completed, the modification homogenization effect is good, and the prepared powder for the pearlized film has small particle size, controllable particle size, accurate particle size and excellent processing performance and mechanical performance.
Although the present invention has been described in detail with reference to the above embodiments, it will be apparent to those skilled in the art from this disclosure that various changes or modifications can be made herein without departing from the principles and spirit of the invention as defined by the appended claims. Therefore, the detailed description of the embodiments of the present disclosure is to be construed as merely illustrative, and not limitative of the remainder of the disclosure, but rather to limit the scope of the disclosure to the full extent set forth in the appended claims.
Claims (5)
1. The preparation process of the powder for the pearlized film is characterized by comprising the following process steps:
s1, taking calcium carbonate raw ore, and crushing the calcium carbonate raw ore by a crusher to obtain calcium carbonate sand powder, wherein the fineness of the calcium carbonate sand powder is 10-15 mm;
s2, uniformly and quantitatively feeding the calcium carbonate sand powder into a calcium carbonate grinding mill for grinding, and collecting the powder through cyclone to obtain calcium carbonate coarse powder, wherein the fineness of the calcium carbonate coarse powder is 200 meshes;
s3, feeding the calcium carbonate coarse powder into a dry vertical stirring ball mill for grinding, and adjusting the proportion of the calcium carbonate coarse powder to the grinding beads to ensure that the calcium carbonate coarse powder is filled in gaps among the grinding beads;
s4, screening the grinding beads after grinding is finished to obtain grinding powder;
s5, feeding the ground powder into a turbine airflow classifier, separating coarse powder from fine powder in the turbine airflow classifier, and feeding fine particles meeting the particle size requirement into a cyclone separator or a dust remover through gaps among blades of a classifying wheel;
s6, obtaining superfine raw powder after cyclone dust collection, wherein the fineness of the superfine raw powder is 2 UM: 75 percent;
s7, feeding superfine raw powder into a modification host, introducing high-temperature hot air into the bottom of the modification host, forming a downward-pressing air flow at the upper end of the modification host, and feeding a surface modifier into the modification host, wherein the superfine raw powder and the surface modifier are coated and modified under the condition of high-temperature hot air and the interweaving of an upper downward-pressing air flow and a lower high-temperature hot air flow, and the temperature of the high-temperature hot air is 105-125 ℃;
and S8, after homogenization, sending the homogenized powder into dust collection equipment for dust collection, wherein the powder obtained after dust collection is the powder for the pearlized film.
2. The process according to claim 1, wherein in step S3, the milled beads have a particle size of 3 mm.
3. The process according to claim 1, wherein the coating amount of the surface modifier in step S7 is 1.9 to 2.0%.
4. The process according to claim 1, wherein in step S8, the particle diameter D50 of the obtained powder for a pearlescent film is 1.0-1.4 μm, D97 is 3.0-4.0 μm, and D100 is 5-7 μm.
5. The process of claim 1, wherein in step S7, the surface modifier is a second-stage pressed plant-grade stearic acid.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202110159191.6A CN112940539A (en) | 2021-02-05 | 2021-02-05 | Preparation process of powder for pearlized film |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202110159191.6A CN112940539A (en) | 2021-02-05 | 2021-02-05 | Preparation process of powder for pearlized film |
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| Publication Number | Publication Date |
|---|---|
| CN112940539A true CN112940539A (en) | 2021-06-11 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN202110159191.6A Pending CN112940539A (en) | 2021-02-05 | 2021-02-05 | Preparation process of powder for pearlized film |
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Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US20150083831A1 (en) * | 2011-04-12 | 2015-03-26 | J.M. Huber Corporation | Narrow Particle Size Distribution Calcium Carbonate and Methods of Making Same |
| CN105348861A (en) * | 2015-10-23 | 2016-02-24 | 谭乔 | Functional calcium carbonate powder and production method thereof |
| CN107746588A (en) * | 2016-08-31 | 2018-03-02 | 陈全保 | Powder surface modification method |
-
2021
- 2021-02-05 CN CN202110159191.6A patent/CN112940539A/en active Pending
Patent Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US20150083831A1 (en) * | 2011-04-12 | 2015-03-26 | J.M. Huber Corporation | Narrow Particle Size Distribution Calcium Carbonate and Methods of Making Same |
| CN105348861A (en) * | 2015-10-23 | 2016-02-24 | 谭乔 | Functional calcium carbonate powder and production method thereof |
| CN107746588A (en) * | 2016-08-31 | 2018-03-02 | 陈全保 | Powder surface modification method |
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Application publication date: 20210611 |
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