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Method for preparing plastic biologic packing material of even adulterated powder

A biological filler and uniform doping technology, which is applied in sustainable biological treatment, chemical instruments and methods, biological water/sewage treatment, etc., can solve problems such as uneven mixing, flying and sinking of light powder, and achieve effective Facilitate processing and forming, avoid clogging the screw, and improve the effect of adding effect

Inactive Publication Date: 2007-12-26
SOUTH CHINA UNIV OF TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

During the preparation process of these new fillers, the powder and the plastic particle base material are usually directly stirred and mixed. Due to the large difference in particle size, density and surface properties between the plastic particles and the added powder, the plastic biofiller is used in the injection molding process. In the process, uneven mixing will occur, and the powder will sink in the hopper of the injection molding machine, causing the filling amount of each modified biological filler powder to be different; sometimes due to too much powder entering the screw of the injection molding machine, it will make it difficult for the filler to form; production During the process, there may even be phenomena such as flying light powder, polluting the air environment and damaging the health of operators.

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0028] Weigh 1000 grams of polyethylene particles as the substrate, put them into a stirring kettle with a heating device, rapidly raise the temperature to 160°C while stirring, and keep this temperature; quickly add 30 grams of magnetic powder, 10 grams of flour, 5 grams of bagasse and polyethylene 5 grams of alcohol, continue to stir for 1 minute, and then stop heating. At this time, most of the powder mixture will evenly adhere to the surface of the plastic particles. After cooling naturally and adding about 5 grams of white mineral oil, put it into the injection molding machine for injection molding. Successfully produced about 20 required fillers. After weighing and calculating the non-adhered powder in the stirred tank, it was found that the powder doping rate was 4.7%.

Embodiment 2

[0030] Weigh 1400 grams of polyethylene particles as the substrate, put them into a stirring tank with a heating device, rapidly raise the temperature to 160°C while stirring, and keep this temperature; quickly add 140 grams of magnetic powder, 20 grams of activated carbon, 25 grams of starch, and hydroxyphosphorus 5 grams of limestone, 5 grams of wood chips, continue to stir for 2 minutes, and then stop heating. At this time, most of the powder mixture will evenly adhere to the surface of the plastic particles. After cooling naturally and adding about 10 grams of vegetable oil, put it into the injection molding machine for injection molding Molding can make about 30 required fillers more easily. After weighing and calculating the non-adhered powder in the stirred tank, it was found that the powder doping rate was 11.8%.

Embodiment 3

[0032] Weigh 1800 grams of polypropylene particles as the base material, put them into a stirring tank with a heating device, rapidly heat up to 180°C while stirring, and keep this temperature; quickly add 380 grams of powder mixture (magnetic powder 260 grams, bagasse 30 gram, 30 grams of flour, 20 grams of hydroxyapatite, 25 grams of polyvinyl alcohol powder, 10 grams of activated carbon, 5 grams of stearic acid), continue to stir for 3 minutes, then stop heating, at this time most of the powder mixture is evenly Adhere to the surface of plastic particles, wait for natural cooling and add about 15 grams of white mineral oil, then put it into an injection molding machine for injection molding, and easily obtain about 40 required fillers. After weighing and calculating the non-adhered powder in the stirred tank, it was found that the powder doping rate was 17.1%. If the traditional direct mixing powder injection molding method is used, due to the large amount of powder added, ...

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PUM

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Abstract

This invention discloses a method for preparing uniformly powder-doped plastic biofiller. The method comprises: placing plastic granular matrix in a stirring kettle, heating or spraying liquid adhesive so that the surface of plastic granular matrix has viscosity, adding powder, stirring, adhering powder to the surface of plastic granular matrix, adding coupling agent and wetting agent, placing in an injection molding machine, and injection-molding to obtain uniformly powder-doped plastic biofiller. The obtained uniformly powder-doped plastic biofiller has such advantages as high uniformity, good appearance, and high powder doping amount, high processability, no dust, no environmental pollution and no harm to operator's health.

Description

technical field [0001] The invention relates to the uniform modification of powder of injection-molded plastic products, in particular to the powder modification method of plastic biological filler used in the biofilm treatment process of industrial wastewater or domestic sewage, which belongs to the processing and molding technology of polymer materials and water treatment technology field. Background technique [0002] Biofiller is one of the core technologies of biofilm water treatment process, usually made of polymer materials such as polypropylene, polyethylene, polyvinyl chloride, polystyrene or polyester as raw materials. Due to the poor hydrophilicity and biological activity of plastic biological fillers, in recent years, by adding various powders to the base material, Chinese invention patents CN1522972, CN1263054 and CN1350984 have disclosed several powder modified fillers such as bio-affinity hydrophilic fillers , magnetic fillers and nutritional slow-release fil...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C08J3/20C08L23/12C08L23/06C08L25/06C08K5/09C08K3/00C08L5/00C02F3/10
CPCY02W10/10
Inventor 程江孔丝纺戴松林皮丕辉文秀芳罗晓虹海景卢志刚杨卓如
Owner SOUTH CHINA UNIV OF TECH
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