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

Use of melt plasticizers to enhance processability and mechanical properties of polyolefin articles

a technology of polyolefin and plasticizer, which is applied in the directions of yarn, textiles, transportation and packaging, etc., can solve the problems of inability to use in color critical applications, inability to fully integrate, and immediate discoloration

Inactive Publication Date: 2006-08-17
BRADSHAW HOWARD GRANT
View PDF13 Cites 2 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Economically and commercially available property modifiers for polyolefin products will only continue to fuel this already rapidly growing market demand.
Unfortunately, these other plasticizing additives impart inherent problems associated with their use.
However, their use in color critical applications is limited due to the fact that these additives have a tendency to discolor upon long term heat aging, they have poor processing thermal stability which can lead to immediate discoloration, and they are very migratory.

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

example 1

[0088] The materials in the above “general recipe” were combined and thoroughly and homogenously mixed, fed into a twin screw extruder, extruded, quenched and pelletized. The resultant melt plasticizer masterbatch pellets are then thoroughly mixed at 3.0% by weight with 97.0% of 12 MFR polypropylene homopolymer and then fed into a single screw extruder melted, mixed and extruded. The extrudate was then forced through a spinnerette and continuous filament fibers were spun, quenched, drawn or oriented over dry heat godet rolls and taken up by a traversing winder as a continuous package of untexturized yarn at 1300 meters / minute. The package of yarn was then physically tested and its mechanical properties were determined and compared to yarn extruded exactly as above but not containing the poly-esterified sucrose additive masterbatch (melt plasticizer masterbatch). The table below lists the physical properties of the melt plasticized modified yarn verses yarn extruded with no additive ...

example 2

[0090] The materials in the above “general recipe” were combined and thoroughly and homogenously mixed, fed into a twin screw extruder, extruded, quenched and pelletized. The resultant melt plasticizer masterbatch pellets are then thoroughly mixed at 3.0% by weight with 97.0% of 12 MFR polypropylene homopolymer and then fed into a single screw extruder melted, mixed and extruded. The extrudate was then forced through a spinnerette and continuous filament fibers were spun, quenched, drawn or oriented over dry heated godet rolls and taken up by a traversing winder as a continuous package of untexturized yarn at 1300 meters / minute. The package of yarn was then physically tested and its mechanical properties were determined and compared to yarn extruded exactly as above but at a much higher draw ratio via increasing the speed of the second heated godet role. Also, the amount of polymer through put was increased by increasing the speed of the melt pump and extruder to compensate for the ...

example 3

[0092] The polypropylene in the above mentioned “general recipe” was replaced with a 12 melt flow indexed linear low density polyethylene homopolymer (film or fiber grade). The melt plasticizer masterbatch pellets are then thoroughly mixed at 3.0% by weight with 97.0% by weight with 12 melt flow linear low density polyethylene and then fed into a single screw extruder and melted, mixed and extruded. The extrudate was then forced through a spinnerette, extruded and was oriented using standard draw ratios of about 2.5 to 1. When the elongation of the polyethylene fibers was determined it was noted as being 25% higher than would be expected if no melt plasticizer masterbatch were used. The trial was then run again to achieve higher throughputs and the take up speeds were increased by 25%. The fiber processed very well even at these higher processing speeds. The filament fibers were then mechanically tested to determine their elongation and it was found that the elongations were accepta...

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

PropertyMeasurementUnit
Fractionaaaaaaaaaa
Percent by massaaaaaaaaaa
Percent by massaaaaaaaaaa
Login to View More

Abstract

The present invention relates to plasticized polyolefin compositions comprising a polyolefin and plasticizer comprising certain types or grades of poly-esterified sucrose. The poly-esterified sucrose has a weight average molecular weight of between 1,800 grams / mole and 3,500 grams / mole, and is present at levels of about 0.01% to 80% by weight in the polyolefin and more preferably 0.10 to 1.25% by weight in the polyolefin. The polyolefin may be a polypropylene homopolymer, copolymer, or impact copolymer, or a high density polyethylene, low density polyethylene, or linear low density polyethylene, or blends thereof. The compositions of the present invention exhibit significant increases in both axial and biaxial elongations, significant increases in the tenacity, significant reductions in the achievable linear density or reductions in the achievable gauge or thickness, significant improvements in throughputs and processing efficiencies and / or significant increases in the overall “toughness” of the extruded poly-esterified sucrose modified polyolefins.

Description

BACKGROUND OF THE INVENTION [0001] Polyolefins are important and widely used polymers. The use of polyolefin resins to produce fibers, tapes, films, sheeting, molded articles and related products has been a rapidly growing and increasingly competitive market. Polyolefins can be grouped into several broad categories, in particular their industrial grades include high density polyethylene, low density polyethylene, linear low density polyethylene, co-polymers of polyethylene, iso-tactic, and syndiotactic polypropylene homopolymer and polypropylene copolymers. [0002] When polyolefins are extruded into fiber, films, tapes, monofilaments, or molded parts they are used extensively in but not limited to the following markets: [0003] 1. Carpets and Floor Coverings [0004] 2. Wall coverings and Sound Insulation materials [0005] 3. Baby Diapers and Hygenics Applications [0006] 4. Commercial & Residential Upholstery [0007] 5. Some Apparel Applications [0008] 6. Geotextiles [0009] 7. Building Ma...

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
IPC IPC(8): D02G3/00
CPCC08L5/00C08L23/02C08L23/10Y10T428/2913C08L2666/02C08K5/17
Inventor BRADSHAW, HOWARD GRANT
Owner BRADSHAW HOWARD GRANT