Unlock instant, AI-driven research and patent intelligence for your innovation.

Method for making heat insulation board by recovery and regeneration of waste hard polyurethane foam

A technology of rigid polyurethane and foam plastics, which is applied in the pretreatment of molding materials, application, household components, etc., can solve the problems of uneconomical, high processing costs, unstable thermal insulation performance of recycled boards, etc., and achieve good heat insulation and molding good sex effect

Inactive Publication Date: 2008-05-14
江博新 +5
View PDF2 Cites 0 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, the chemical method of heat energy recovery and landfill method will cause secondary environmental pollution and uneconomical reasons, so it is rarely used in production, and the most promising method is physical recovery.
Among the physical methods of recycling, bonding molding is the most worthy of promotion, but the existing recycling methods of bonding molding still have the problems of high processing cost and unstable thermal insulation performance of recycled boards. Therefore, it is necessary to develop a recycled board that can significantly reduce costs and A new technology process with guaranteed thermal insulation performance is necessary

Method used

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
View more

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0016] After weighing 50 kilograms of rigid polyurethane foam obtained by dismantling waste refrigerators, regenerate the insulation board according to the following steps:

[0017] 1. Put large pieces of foamed plastics into the pulverizer to obtain coarse-grained foamed plastics with a size of 1 to 5 cm;

[0018] 2. Put the coarse-grained foam plastic in the container, add 4.5 kg of polyurethane glue and 5 kg of powdered urea-formaldehyde glue, and then fully stir. During the stirring process, spray 1.2 kg of water with a sprayer;

[0019] 3. Put all the coarse-grained foam plastics that have been added with adhesive and water and have been fully stirred into a steel mold with a length of 1 meter, a width of 1 meter, and a height of 1.2 meters. There are electric heating wires around the mold, and the power is turned on. , when the surface temperature of the mold reaches 60 degrees, pressure can be applied from top to bottom. ) is enough, keep the pressure state for 1 to 2 ...

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to View More

PUM

No PUM Login to View More

Abstract

The invention discloses a recycling scrapped hard polyurethane foam plastic to produce heat insulation plate. Its main feature is that add adhesives and water into the scrapped polyurethane foam plastic after crushed, fill the mould with the mixture after rabbling and maintain determined pressure and temperature for some time, obtain the heat insulation sheets after unmoulding. The invention is of simple technics, low costs and is beneficial for the environment.

Description

technical field [0001] The invention relates to a method for recycling waste rigid polyurethane foam, in particular to a method for recycling and utilizing polyurethane foam to make insulation boards. Background technique [0002] At present, in the process of producing rigid polyurethane foam products, a certain amount of leftovers will be produced. In addition, after refrigerators and freezers are scrapped and disassembled, many rigid polyurethane foams will also be produced. Now, these plastics are usually Randomly discarded, landfilled or incinerated, its biggest disadvantage is that it invades farmland and rivers, and causes very serious air pollution due to incineration, and also causes a lot of waste of polyurethane material resources. At present, there is no good solution. [0003] By searching and consulting relevant background technologies, the recycling of waste polyurethane foam mainly includes the above four recycling methods such as physical methods, chemical m...

Claims

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to View More

Application Information

Patent Timeline
no application Login to View More
Patent Type & Authority Patents(China)
IPC IPC(8): B27N3/02B27N3/10B27N1/02
CPCY02P70/10
Inventor 江博新薛红伟徐标苏醒任建龙张晓东
Owner 江博新