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A method for preparing a sandwich PET foam material for a wind power generation blade

A technology for wind power generation blades and foam materials, which is applied in the field of preparation of PET foam materials, can solve the problems of uniform foaming density, insufficient PET viscosity, cell rupture, etc., achieves low melt flow rate, improves solubility, and improves The effect of density

Active Publication Date: 2017-11-17
JIANGSU YUEKE NEW MATERIAL
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, this patent also has deficiencies, such as insufficient PET viscosity, resulting in the moment of pressure release and foaming, cell rupture, and problems with uniformity and foaming density

Method used

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  • A method for preparing a sandwich PET foam material for a wind power generation blade
  • A method for preparing a sandwich PET foam material for a wind power generation blade
  • A method for preparing a sandwich PET foam material for a wind power generation blade

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0037] A method for preparing wind power generation blade sandwich PET foam material, adopts the following steps:

[0038] (1) Mix 1 part of titanium dioxide, 1 part of heat stabilizer triphenyl phosphate, 100 parts of PET resin and 4 parts of polymer additives and preheat to 80°C. The polymer additives used are 4wt% multi-component Alcohol Schiff base polymer additive;

[0039] (2) The temperature of the extruder is rapidly raised to 250°C, and the supercritical CO 2 and N 2 mixed liquid, N 2 and CO 2 The volume ratio is 1:10, the control reaction pressure is 15MPa, the PET resin slowly passes through the extruder, the screw speed of the extruder is 60r / min, the mold part is cooled by circulating water, and the cooling rate of the circulating water is 10°C / min , rapid depressurization and foaming, the decompression rate is 5Mpa / S, that is, the sandwich PET foam material for wind power generation blades is prepared.

[0040] The polyalcohol Schiff base polymer that adopts...

Embodiment 2

[0044] A method for preparing wind power generation blade sandwich PET foam material, adopts the following steps:

[0045] (1) Mix 3 parts of barite powder, 3 parts of heat stabilizer triethyl phosphoroacetate, 100 parts of PET resin and 8 parts of polymer additives and preheat to 80°C. The polymer additives used are 8wt % polyol Schiff base polymer additive;

[0046] (2) The temperature of the extruder is rapidly raised to 250°C, and the supercritical CO 2 and N 2 mixed liquid, N 2 and CO 2 The volume ratio is 1 / 10, the control reaction pressure is 15MPa, the PET resin passes through the extruder slowly, the screw speed of the extruder is 60r / min, the mold part is cooled by circulating water, and the rapid cooling rate of circulating water is 15°C / min , rapid depressurization and foaming, the decompression rate is 5Mpa / S, that is, the sandwich PET foam material for wind power generation blades is prepared.

[0047] In this embodiment, the polyol Schiff base polymer is

...

Embodiment 3

[0054] A method for preparing wind power generation blade sandwich PET foam material, adopts the following steps:

[0055] (1) Mix 1 part of lithopone dye, 1 part of heat stabilizer triphenyl phosphate, 100 parts of PET resin and 1 part of polymer additive and preheat to 80°C. The polymer additive used contains 1 wt% Polyol Schiff base polymer additive;

[0056] (2) The temperature of the extruder is rapidly raised to 250°C, and the supercritical CO 2 and N 2 mixed liquid, N 2 and CO 2 The volume ratio is 0.05, the control reaction pressure is 8MPa, the PET resin slowly passes through the extruder, and the screw speed of the extruder is 60r / min. The mold part is cooled by circulating water, and the cooling rate is 10°C / min, and the pressure is reduced rapidly to foam, and the wind power blade sandwich PET foam material is prepared.

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Abstract

The invention relates to a method for preparing a sandwich PET foam material for a wind power generation blade. The material is prepared by mixing 1-5 parts of dye or pigment, 1-5 parts of a heat stabilizer, 100 parts of PET resin and 1-10 parts of a polymer auxiliary agent, pre-heating the mixture to 80 DEG C, rapidly heating an extruder to 250-270 DEG C, feeding a liquid mixture of supercritical CO2 and N2 into the extruder, allowing the PET resin to slowly pass through the extruder with the reaction pressure being controlled to be 8-20 MPa and the screw rotating speed of the extruder being 60-200 r / min, cooling a mold part partially by utilizing circulating water, and rapidly reducing the pressure for forming foams to obtain the sandwich PET foam material. Compared with the prior art, the percentage of closed holes and the cell density are increased by the method.

Description

technical field [0001] The invention relates to a method for preparing a PET foam material, in particular to a method for preparing a wind power generation blade sandwich PET foam material. Background technique [0002] Plastic products have a very wide range of applications, from ordinary household products to advanced engineering materials. At present, plastics have become one of the most common and most used materials. In the past few decades, with people's interest and investment in the research of plastic production technology, it has become popular to obtain cheaper and practical plastic products. Among them, the foaming material with excellent properties is a special plastic product with great development prospects because of its wide application. According to the different raw materials used for foaming, foaming materials include PU, PVC, PS, PP, PET and other thermoplastic foaming materials. Materials with excellent performance can also be used in engineering mate...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C08L67/02C08L101/02C08K3/22C08K5/523C08K3/30C08K5/521C08K3/28C08J9/12
CPCC08J9/122C08J2203/08C08J2367/02C08J2400/106C08L67/02C08L2203/14C08L2203/20C08L101/025C08K2003/2241C08K5/523C08K2003/3045C08K5/521C08K2003/3036C08K3/28
Inventor 李利红周利峰
Owner JIANGSU YUEKE NEW MATERIAL