Controlled flow polymer blends and products including the same

a technology of polymer blends and products, applied in the field of polymer blends and articles, can solve the problems of inadequate melt strength and limited usefulness of polymer blends, and achieve the effect of facilitating manufacturing and downstream storage and transportation of products

Inactive Publication Date: 2008-02-21
MISSING OCTAVE INSIGHTS
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Benefits of technology

[0010]The present invention is directed to polymer blends exhibiting desirable flow properties without also exhibiting the blocking properties typically associated with high flow polymers. The polymer blends of the invention are capable of substantially wetting out a surface at a flow activating temperature without req

Problems solved by technology

The at least one compound of the second component of the blend may, for example, exhibit such a high level of molecular mobility that when processed alone, its usefulness i

Method used

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  • Controlled flow polymer blends and products including the same
  • Controlled flow polymer blends and products including the same
  • Controlled flow polymer blends and products including the same

Examples

Experimental program
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Effect test

example 1 (

INVENTION)

[0099]45% of a high molecular weight maleated polyethylene (such as that commercially available from Eastman Chemical as Epolene G-2608) is blended with 55% of a common paraffin (such as that commercially available as IGI 1230). The resulting blend exhibits sufficient melt strength for fiber spinning and further bonds (without pressure) to acrylic at 120° C., which is a 60° C. drop from the temperature required of G-2608 alone. The mixture does not exhibit blocking on the package even when held at temperatures above the melting point of the paraffin.

example 2 (

INVENTION)

[0100]50% of a maleated polypropylene wax (such as Eastman's Epolene C-18) is blended with 50% of a common paraffin (IGI 1230). This material is coated onto acrylic yarn and incorporated into chenille yarn. The blend bonds in boiling water baths typical of dying processes, yet does not exhibit blocking problems upon shipping. Improved wear resistance of the chenille is achieved at normal use temperatures in such applications as automotive upholstery. This example exemplifies a “100° C. flow system” as discussed herein and is illustrated in FIGS. 1, 3A-B and 4A-C. In this example, the paraffin component alone exhibits blocking and no functionality for wet-out. The Epolene wax exhibits too high a melting point to flow at the desired temperatures. The blend can be useful as a coating onto a yarn and as a core of a chenille yarn. The blend can penetrate readily into an effect yarn (such as an acrylic or cotton effect yarn) at about 100° C. (a temperature sufficient to drive of...

example 3 (

INVENTION)

[0101]A low molecular weight maleated polyethylene or polypropylene wax, such as those commercially available from Eastman Chemical under the trade name Epolene, is blended with a high molecular weight polyethylene or modified polypropylene to gives results similar to that exhibited by the blend of Example 2. The blend exhibits high flow yet good fiber-forming properties at remarkably low temperatures, and at the same time good integrity in uncontrolled storage conditions. This example exemplifies a “150° C. flow system” as discussed herein and is illustrated in FIGS. 2A and 2B. In this example, the polyethylene alone exhibits poor flow at this temperature and no functionality. The Epolene wax has too low a viscosity / melt strength to be spun into fibers. The blend may be useful spun as the sheath of a bicomponent filaments yarn and the yarn can be used as the core of a chenille yarn, When heated in an autoclave, the bonder can readily penetrate into the effect yarn and hol...

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Abstract

The present invention is directed to polymer blends having controlled flow properties. The polymer blends can be useful in various applications including bonding systems and additive delivery systems, which can provide durable binding and/or delivery and/or affixing of additives. The polymer blends can include at least two different components, at least one being a polymer component having a higher molecular than the other of the components. When heated to an activating temperature, the resultant blend exhibits desirable flow or wet out properties without applied pressure. Despite the controlled flow properties, the blends do not exhibit blocking or fusing properties typically associated with high flow polymer materials.

Description

FIELD OF THE INVENTION[0001]The present invention relates to polymer blends and articles including the same. More particularly, the present invention relates to polymer blends having useful flow or wetting properties without undesirable blocking properties and to products including the same.BACKGROUND OF THE INVENTION[0002]Fibrous materials having various functionalities are useful in many different applications. Often, it can be useful to treat a fibrous material to impart or enhance a particular property thereof, such as flame retardance, UV resistance, and the like.[0003]The functionality of a fibrous material can be modified by introducing a suitable additive into the fibrous structure. Many natural fibers exhibit polar functionality (such as hydroxyl functionality found in cotton fibers), due at least in part to the biological origins of such materials. Nonetheless, functional groups present in many natural fibrous materials can exhibit limited reactivity, and accordingly, addi...

Claims

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Application Information

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IPC IPC(8): D04H13/00C09D7/65
CPCC08F255/00Y10T156/10C08K9/10C08L51/06C09D7/1291D01F6/46D01F8/06D04H1/42D04H3/00D06M15/227D06M23/08D06M2101/06D06M2101/28C08K3/0058C08L2666/02C08L2666/04C09D7/70C08K3/016Y10T442/659Y10T442/60Y10T442/20Y10T442/637C09D7/65
Inventor KEEP, GERALD TIMOTHY
Owner MISSING OCTAVE INSIGHTS
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