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Process for preparing flame retardant low density polyethylene foam resin

A low-density polyethylene, polyethylene resin technology, applied in the field of polyethylene foam resin, can solve problems such as unsuitability and inability to use

Inactive Publication Date: 2005-06-29
金高明 +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0006] Although the low-density polyethylene resins of the prior art have the following advantages, for example, they are used in clothes for specific purposes because of their cold resistance, water resistance, and buoyancy, but because of their thermoplasticity, if they are used in building materials, it is not suitable
In addition, heat resistance is required for specific-purpose clothing such as fireman's outerwear, and in this case, there is a disadvantage that it cannot be used

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment

[0019] The first process (mixing stage)

[0020] Convert 86kg specific gravity to 10-40LBS / ft 3 LDPE resin, 8.6 kg of azodicarboxylic acid amide, 3.4 kg of common flame retardant, 2 kg of antimony oxide (Sb 2 o 3 ) is injected into a closed heating cylinder for mixing;

[0021] The second process (foaming stage)

[0022] Heat the mixture injected into the cylinder as described above, heat it to 150-200°C, make it foam, form expanded beads (Expanded Beads) in the above-mentioned polyethylene, and then lower the temperature to expand the foam. The ethylene foam is shrunk and hardened, and then 100 g of dichlorofluoromethane as a gas blowing agent is used with respect to 1 kg of the above-mentioned mixture to expand the foaming cells;

[0023] The third process (hardening stage)

[0024] After cooling the expanded foam cells in the above step, heating at 50-80° C. for 10 minutes, and then leaving at room temperature for at least 24 hours, thereby producing a flame-retardant ...

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Abstract

The invention relates to a method for preparing burning retardant polyethylene with low density, whose characteristic is that its productive method includes: the step to mix foaming agent, burning retardant, potasium oxide and combination of polyethylene with low density, the step to foam the polyethylene above, and the step to harden the polyethylene with low density.

Description

technical field [0001] The present invention relates to a polyethylene foaming resin, in particular to a method for producing a flame-retardant low-density polyethylene foaming resin used for clothes and building materials. Background technique [0002] In general, polyethylene is a synthetic resin obtained by polymerizing ethylene obtained from petroleum or coal, and is easy to process because of its thermoplasticity, and thus is widely used in various applications. [0003] In particular, polyethylene foamed resins, which have buoyancy, cold resistance, and water resistance by adding a foaming agent to the above-mentioned polyethylene, are used in special-purpose clothing, building materials, and the like. [0004] Although there are many methods for producing polyethylene foam resin, the content disclosed in Korean Patent Publication No. 91-5864 will be described as an example. [0005] As disclosed in this patent publication, in the production method, it is described th...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C08J9/04C08L23/06
Inventor 金高明
Owner 金高明
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