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Method for recycling waste rigid polyurethane foam plastics and waste spandex filaments

A rigid polyurethane, polyurethane foam technology, applied in the direction of plastic recycling, recycling technology, etc., can solve the problems of no progress, complicated operation, too complicated, etc., and achieve the effect of low cost, simple process and good flame retardancy

Inactive Publication Date: 2014-10-29
上海华峰普恩聚氨酯有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

This method needs to prepare stock solution, which is too complicated
[0007] Due to the special physical and chemical properties of rigid polyurethane foam and spandex, recycling in the prior art requires some chemical treatment, the operation is too complicated, and it can only be processed separately. There is no simultaneous rigid polyurethane foam and spandex An effective method for the special treatment of spandex, those skilled in the art have been seeking a simple and easy method for recycling waste rigid polyurethane foam and waste spandex yarn for a long time, but there is no progress

Method used

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  • Method for recycling waste rigid polyurethane foam plastics and waste spandex filaments
  • Method for recycling waste rigid polyurethane foam plastics and waste spandex filaments
  • Method for recycling waste rigid polyurethane foam plastics and waste spandex filaments

Examples

Experimental program
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Effect test

Embodiment 1

[0038] The waste rigid polyurethane foam is crushed and impurities are removed to obtain foam particles with a size of 1-5mm. Weigh 95kg;

[0039] Crush the waste spandex filaments and remove impurities to obtain short spandex filaments with a size of 1 to 5 cm, weighing 5 kg;

[0040] Pour the foam particles and short spandex filaments into the mixer, add 12kg of polyurethane glue and stir thoroughly, during the stirring process, spray 1kg of water with a sprayer;

[0041] Pour the fully stirred mixture with adhesive and water into a container with a length of 2.7 meters, a width of 1.5 meters and a height of 0.5 meters. After being pressed by rollers, it is sent to a hot press for hot pressing. Wherein, the temperature of the hot press forming is 150° C., the pressure is 120 bar, and the holding time is 10 minutes.

[0042] The applied pressure is unloaded, the board is demoulded and taken out to obtain the rough embryo of the polyurethane imitation wood board, and then af...

Embodiment 2

[0044] The waste rigid polyurethane foam is crushed and impurities are removed to obtain foam particles with a size of 1-5mm. Weigh 90kg;

[0045] Crush the waste spandex filaments and remove impurities to obtain short spandex filaments with a size of 1 to 5 cm, weighing 10 kg;

[0046] Pour the foam particles and short spandex filaments into the mixer, add 10kg of polyurethane glue and stir thoroughly, during the stirring process, spray 3kg of water with a sprayer;

[0047] Pour the fully stirred mixture with adhesive and water into a container with a length of 2.7 meters, a width of 1.5 meters and a height of 0.5 meters. After being pressed by rollers, it is sent to a hot press for hot pressing. Wherein, the temperature of the hot press forming is 150° C., the pressure is 130 bar, and the holding time is 10 minutes.

[0048] The applied pressure is unloaded, the board is demoulded and taken out to obtain the rough embryo of the polyurethane imitation wood board, and then a...

Embodiment 3

[0050] The waste rigid polyurethane foam is crushed and impurities are removed to obtain foam particles with a size of 1-5mm. Weigh 85kg;

[0051]Crush the waste spandex filaments and remove impurities to obtain short spandex filaments with a size of 1 to 5 cm, weighing 7 kg;

[0052] Pour the foam particles and short spandex filaments into the mixer, add 8kg of polyurethane glue and stir thoroughly, during the stirring process, spray 3kg of water with a sprayer;

[0053] Pour the fully stirred mixture with adhesive and water into a container with a length of 2.7 meters, a width of 1.5 meters and a height of 0.5 meters. After being pressed by rollers, it is sent to a hot press for hot pressing. Wherein, the temperature of the hot press forming is 150° C., the pressure is 120 bar, and the holding time is 15 minutes.

[0054] The applied pressure is unloaded, the board is demoulded and taken out to obtain the rough embryo of the polyurethane imitation wood board, and then thro...

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Abstract

The invention provides a method for recycling waste rigid polyurethane foam plastics and waste spandex filaments. The method comprises the following steps: 1, respectively crushing waste rigid polyurethane foam plastics and waste spandex filaments to obtain polyurethane foam particles and short spandex filaments; 2, mixing raw materials to obtain a mixture at room temperature, and pre-pressing the mixture, wherein the raw materials comprise the polyurethane foam particles, the short spandex filaments, an adhesive and water; and 3, carrying out hot press molding on the pre-pressed mixture obtained in step 2 to prepare a polyurethane composite material. The method has the advantages of simple process, low cost, simultaneous recycling of the waste rigid polyurethane foam plastics and the waste spandex filaments, waste use benefiting and environmental protection benefiting. The polyurethane composite prepared by adopting the method has the advantages of no formaldehyde, good flame retardation property, and certain toughness and strength, and can replace middle density boards, particleboards and the like to be applied in all kinds of doors, windows, floors and table boards.

Description

technical field [0001] The invention relates to a method for recycling waste, in particular to a method for recycling waste rigid polyurethane foam and waste spandex. Background technique [0002] Rigid polyurethane foam is an excellent thermal insulation and structural material. Among all kinds of polyurethane products, the output is second only to flexible foam plastics. Rigid polyurethane foam is a highly cross-linked thermoset material. Most of the cell structure is closed cell type, and a small amount of open cell structure rigid foam is used for special occasions. The main characteristic of rigid polyurethane foam is its hardness and toughness. In addition, due to the difference in the amount and variety of additives such as flame retardants, foaming agents, and catalysts, polyurethane rigid foams are also endowed with different properties. Its foamability, toughness, low temperature resistance, solvent resistance, biological aging resistance and other excellent pro...

Claims

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Application Information

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IPC IPC(8): B29B17/00B29C43/58
CPCY02W30/62
Inventor 杨清文唐志勇尤金明戴胜陈积修董祥启
Owner 上海华峰普恩聚氨酯有限公司
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