Rotational molding product with nano-structure surface, and manufacturing process thereof

A nanostructure and manufacturing process technology, applied in the field of rotomolding products, can solve the problems of easy peeling of the coating and complicated preparation process, and achieve the effect of strong hydrophobicity and oleophobicity, simplifying the preparation process and prolonging the service life.

Inactive Publication Date: 2020-06-09
ZHEJIANG ROTOUN PLASTIC TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] The present invention aims to overcome the problems of complex preparation process and easy peeling of the coating in the prior art, and provide a rotomolded product with a nanostructured surface and its manufacturing process. The prepared rotomolded product has strong hydrophobic and oleophobic ability , so that the rotomolded products can be protected from the erosion of liquid and environmental moisture, etc., can save cleaning costs, prolong the service life of the products, the preparation process is simple, and the rate of high-quality finished products is high

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0031] A manufacturing process of a rotationally molded product with a nanostructured surface proceeds in the following steps:

[0032] a. Mix 70-99% thermoplastics and 1-30% nano-magnetic substances, melt and mix them through thermoplastic processing equipment such as internal mixers and extruders, and then crush them to make composite material powder;

[0033] b. Put the composite material powder into the rotomolding mold for rotomolding processing;

[0034] c. After the rotomolding process is finished, move the mold to the radial magnetic field to rotate until the cooling stage is over;

[0035] d. Open the mold and take out the rotationally molded product. At the highest air temperature in the processing mold, the zero-shear viscosity of the thermoplastic material is greater than or equal to 500Pa·s and less than or equal to 4000Pa·s. Its thermoplastic material is polyethylene, polypropylene, polytetrafluoroethylene, polyester, nylon, polycarbonate, PEEK and its homologu...

Embodiment 2

[0038] Nylon 6 (PA24000, Guangdong Meida) 7.5Kg, iron oxide modified carbon nanotubes (CN1971780B, Beijing University of Chemical Technology) 2.5Kg are granulated in a twin-screw extruder, and ground into powder on a plastic mill. The zero-shear viscosity is 800Pa·s, the iron oxide modified carbon nanotubes have a diameter of 160nm, an aspect ratio of 50, and a Curie temperature of 310°C. Put 10Kg of the composite material powder into a tubular rotomolding mold at a furnace temperature of 310°C and a speed of 4rpm. The speed ratio is 1:4, and the heating time is 21 minutes for rotomolding. When the air temperature in the mold reaches 220°C, the heating ends, and the mold is moved to a radially uniform magnetic field for cooling.

Embodiment 3

[0040] Polyethylene (LLD546U, Sinopec) 8Kg, nano acicular iron oxide powder (TR-718, Zhejiang Zhengqi) 2Kg were granulated in a twin-screw extruder, and ground into powder on a plastic mill. The zero-shear viscosity is 1000Pa·s, the diameter of the nanoacicular iron oxide powder is 500nm, the aspect ratio is 6, and the Curie temperature is 320°C. Put 10Kg of the composite material powder into a tubular rotomolding mold. The ratio is 1:4, and the heating time is 23 minutes for rotational molding. When the air temperature in the mold reaches 220°C, the heating ends, and the mold is moved to a radially uniform magnetic field for cooling.

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Abstract

The invention relates to a rotational molding product. Based on the problems of complex preparation process and easy stripping of the coating in the prior art, the invention discloses a rotational molding product with a nano-structure surface, and a manufacturing process thereof, wherein the composite material used by the product comprises the following components in percentage by mass: 70-99% ofa thermoplastic plastic and 1-30% of a nano magnetic substance. The manufacturing process of the rotational molding product comprises the following steps: a, melting and mixing a thermoplastic plasticand a nano magnetic substance to prepare composite material powder; b, carrying out rotational molding processing on the composite material powder; c, moving the rotational molding product into a radial magnetic field, and rotating until cooling is finished; and d, taking out the rotational molding product. The obtained rotational molding finished product has high hydrophobic and oleophobic capacity, so that the rotational molding product can be prevented from being corroded by liquids, environmental moisture and the like, the cleaning cost can be saved, the service life of the product can beprolonged, the preparation process is simple, and the high-quality yield is high.

Description

technical field [0001] The invention relates to a rotational molding product, in particular to a rotational molding product with a nanostructure surface and a manufacturing process thereof. Background technique [0002] Rotational molding is a plastic processing method that uses a rotating mold for processing. The processing process is to put plastic powder or slurry into the mold, and the closed mold is rotated or shaken on the equipment, and the mold is heated by an open flame or hot air. External heating, the plastic powder or slurry is turned and flowed in the mold under the condition of being heated. After the temperature reaches the sticking temperature, it is gradually coated on the inner surface of the mold, melted and condensed, and the mold is placed in the natural environment or passed through water, After cooling by media such as fog and wind, the mold is removed and the product is taken out. Rotomolded products are used as containers to hold various chemical so...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C08L23/08C08K7/08C08L77/02C08K3/22C08K9/02C08K3/04B29C41/04
CPCC08K7/08C08K3/22C08K9/02C08K3/041B29C41/04B29C41/003C08K2201/011C08K2003/2272C08K2201/01C08L23/0815C08L77/02
Inventor 唐宇航温原白沂麟
Owner ZHEJIANG ROTOUN PLASTIC TECH
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