Process for manufacturing nonwoven web material
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United States of America Patent
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Jan 10, 2017
Grant Date -
May 7, 2015
app pub date -
Nov 1, 2013
filing date -
Nov 1, 2013
priority date (Note) -
In Force
status (Latency Note)
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Abstract
A nonwoven web material including fibers formed of a polyolefin and a polyester is disclosed. The fibers may include fine fibers produced by, for example, a meltblowing process. The polyolefin may be polypropylene and the polyester may be polylactic acid. The polylactic acid may be obtained and included by recycling scrap nonwoven material containing a polylactic acid component, hydrolyzing the polylactic acid component to reduce its viscosity, blending the hydrolyzed polylactic acid with a polyolefin resin, and melt-spinning the blended material to form fibers. A related process is disclosed.
First Claim
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International Classification(s)
- C08J:WORKING-UP; GENERAL PROCESSES OF COMPOUNDING; AFTE....
- D01D:MECHANICAL METHODS OR APPARATUS IN THE MANUFACTURE....
- B29C:SHAPING OR JOINING OF PLASTICS; SHAPING OF SUBSTAN....
- B29B:PREPARATION OR PRETREATMENT OF THE MATERIAL TO BE ....
- D04H:MAKING TEXTILE FABRICS, e.g. FROM FIBRES OR FILAME....
- B32B:LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA....
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