Processes for recycling carpet and products of such processes
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United States of America Patent
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Sep 12, 2017
Issued Date -
N/A
app pub date -
Sep 12, 2014
filing date -
Nov 4, 2011
priority date (Note) -
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status (Latency Note)
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Abstract
Methods for the recycling of carpet are disclosed that produce clean face fiber suitable for industrial use. The methods allow the recovery of face fiber material, for example a polyester or a polyamide, from carpets that includes a face fiber material and a backing material, and include the steps of heating the carpet to a temperature lower than the melting point of the face fiber material, but higher than the initial thermal decomposition temperature of the backing material, for a time and at a temperature sufficient to thermally decompose, pyrolyze, or oxidize at least a portion of the backing material, rendering the backing material friable, that is more friable than the untreated backing; and applying mechanical force to the carpet so as to liberate the friable backing material from the face fiber material.
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International Classification(s)
- C08J:WORKING-UP; GENERAL PROCESSES OF COMPOUNDING; AFTE....
- B02C:CRUSHING, PULVERISING, OR DISINTEGRATING IN GENERA....
- D01B:MECHANICAL TREATMENT OF NATURAL FIBROUS OR FILAMEN....
- C08G:MACROMOLECULAR COMPOUNDS OBTAINED OTHERWISE THAN B....
- B29B:PREPARATION OR PRETREATMENT OF THE MATERIAL TO BE ....
- B29K:INDEXING SCHEME ASSOCIATED WITH SUBCLASSES B29B, ....
- B29L:INDEXING SCHEME ASSOCIATED WITH SUBCLASS B29C, RE....
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