Recycled polyester material and preparation method thereof

A technology of recycled polyester and polyester, which is applied in the field of recycled polyester materials and its preparation, can solve problems such as the shedding of polymer chain thermal degradation groups, affecting the recycling of waste polyester, and the poor performance of recycled polyester, so as to promote Dispersion, guaranteed anti-aging effect, high tensile strength effect

Active Publication Date: 2020-11-24
GUANGZHOU UNIVERSITY
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  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003]Waste and old polyester products are susceptible to aging due to external force, heat, light, oxygen and other factors during long-term use or disposal. Polyester will Breakage of chemical bonds, thermal degradation of polymer chains and shedding of groups occur, the molecular weight will decrease, and the physical properties will deteriorate, such as hardening, stickiness, brittleness, discoloration, loss of strength, etc., and often produce a certain odor , these changes will affect the recycling of waste polyester
The existing polyester recycling methods are generally simple recycling, the performance of the obtained recycled polyester is poor, the application range is small, and the utilization value is not high

Method used

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  • Recycled polyester material and preparation method thereof
  • Recycled polyester material and preparation method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0065] A kind of regenerated polyethylene terephthalate material, its preparation method comprises the following steps:

[0066] 1) Crushing waste polyethylene terephthalate products into particles with a particle diameter of 1 to 5 mm, then degreasing, cleaning, and drying to obtain waste polyethylene terephthalate particles;

[0067] 2) 82 parts by mass of waste polyethylene terephthalate particles, 8 parts by mass of silicon dioxide with a particle diameter of 3-15 μm, 2 parts by mass of glass fibers, 14 parts by mass of phthalic anhydride, 7 parts by mass Parts by mass of porous alumina with a particle size of 2-8 μm and 3 parts by mass of polyethylene wax were added to a high-speed mixer, and the speed of the mixer was adjusted to 600r / min, and stirred for 8 minutes, and then the materials were transferred to a twin-screw extruder, and the twin-screw extruder was adjusted to The processing temperature of the machine is 245-260°C, the screw speed is 45-50r / min, extruded and ...

Embodiment 2

[0070] A kind of regeneration polycarbonate material, its preparation method comprises the following steps:

[0071] 1) Crushing waste polycarbonate products into particles with a particle size of 1 to 5 mm, then degreasing, cleaning, and drying to obtain waste polycarbonate particles;

[0072] 2) 90 parts by mass of waste polycarbonate particles, 8 parts by mass of talcum powder with a particle diameter of 3 to 15 μm, 3 parts by mass of glass fibers, 12 parts by mass of ethylene glycol diglycidyl ether, 11 parts by mass of ethylene glycol diglycidyl ether with a particle size of 2 Add ~8μm fine-pore silica gel and 2 parts by mass of dioctyl sodium sulfonate to a high-speed mixer, adjust the speed of the mixer to 500r / min, stir for 10min, and then transfer the material to a twin-screw extruder, adjust the twin-screw extruder The processing temperature of the extruder is 225-230°C, the screw speed is 40-45r / min, extruded and granulated to obtain recycled materials;

[0073] 3)...

Embodiment 3

[0075] A kind of regeneration polybutylene terephthalate material, its preparation method comprises the following steps:

[0076] 1) Crushing waste polybutylene terephthalate products into particles with a particle diameter of 1 to 5 mm, then degreasing, cleaning, and drying to obtain waste polybutylene terephthalate particles;

[0077] 2) 98 parts by mass of waste polybutylene terephthalate particles, 13 parts by mass of talcum powder with a particle diameter of 3 to 15 μm, 4 parts by mass of glass fiber, 7 parts by mass of triphenyl phosphite, 6 parts by mass of Add one part of magnesium silicate with a particle size of 2 to 8 μm and 4 parts by mass of sucrose ester into a high-speed mixer, adjust the speed of the mixer to 700r / min, stir for 5min, and then transfer the material to a twin-screw extruder, adjust the speed of the twin-screw extruder The processing temperature is 230-240°C, the screw speed is 40-45r / min, extruded and granulated to obtain recycled materials;

[...

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Abstract

The invention discloses a recycled polyester material and a preparation method thereof. The recycled polyester material is composed of waste polyester, an inorganic filler, glass fiber, a chain extender, a deodorant, a dispersant, an antioxidant, an ultraviolet absorber and a heat stabilizer. The preparation method of the recycled polyester material includes the following steps: 1) preparing wastepolyester particles; 2) mixing the waste polyester particles, the inorganic filler, the glass fiber, the chain extender, the deodorant and the dispersant uniformly, and carrying out extrusion granulation to obtain the recycled material; and 3) mixing the recycled material, the antioxidant, the ultraviolet absorber and the heat stabilizer uniformly, and then performing extrusion granulation to obtain the recycled polyester material. The recycled polyester material has high tensile strength, high bending strength, high elongation at break, good aging resistance and good workability, the recycling preparation process is simple, and the recycled polyester material can be used as an injection molding raw material of helmets, household appliance shells, building boards and toys without additionof new resin.

Description

technical field [0001] The invention relates to the technical field of recycled materials, in particular to a recycled polyester material and a preparation method thereof. Background technique [0002] Plastic has the advantages of light weight, stable chemical properties, easy processing, and low cost, and has been widely used in many fields. However, when plastic is discarded, it becomes a solid waste that is difficult to degrade. At present, the proportion of plastic in municipal solid waste has reached 15% to 20%, and a considerable part of it is polyester products, such as polyester fiber, polyester film, polyester plastic products, etc. The traditional treatment methods of waste polyester products are generally incineration or partial recycling, and the recycling rate is relatively low. New way out. [0003] Waste polyester products are susceptible to aging due to external force, heat, light, oxygen and other factors during long-term use or disposal. Polyester will ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C08L67/02C08L23/06C08K13/04C08K7/24C08K7/14C08K5/13C08K5/132C08K5/098C08L69/00C08K7/26C08K3/34C08K5/372C08K5/3475C08K7/08C08K5/5399C08G63/91C08G64/42B29B9/06B29C48/92
CPCC08L67/02C08K13/04C08K7/26C08K7/14C08K5/13C08K5/132C08K5/098C08K3/34C08K5/372C08K5/3475C08K7/08C08K5/5399C08K7/24C08G63/916C08G64/42B29B9/06B29C48/92C08L2207/20C08L2201/08C08L23/06C08L69/00Y02W30/62
Inventor 徐常威屈俊任
Owner GUANGZHOU UNIVERSITY
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