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Opaque colored and white monofilaments having stability to prolonged exposure to uv light

An ultraviolet, monofilament technology, applied in household appliances, brushes, bristles, etc., can solve problems such as loss of characteristics of monofilament

Inactive Publication Date: 2009-10-21
EI DU PONT DE NEMOURS & CO
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0019] While not all monofilaments require UV attenuating components to maintain desired properties after prolonged exposure to UV light, some monofilaments lose their desired properties

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0044] Nylon 6, 10 resin (commercially available from DuPont Xingda Filaments Co., Ltd. in Wuxi, Jiangsu, China) was mixed with TiO at a rate of 0.413% (by weight). 2 (DuPont DPX-Opt 1) blended to obtain a white blend. A certain percentage of wetting agent (the wetting agent is a white oil that comes into contact with food at a rate of about 0.06 to 0.10%) is applied so that the resin absorbs the powder onto its surface and distributes the powder more evenly.

[0045] A 120-hole spinneret with a circular hole diameter of 0.08 mm was installed in the spinning machine, and the nylon blend was extruded at a temperature range of 215 to 320 ° C, and the nylon blend was heated in a water bath (the temperature of the water bath was in the range of 12 to 35 ° C). ) quenched. After passing through a heat bath in the temperature range of 80 to 100°C, the resulting strands are stretched to obtain monofilaments with uniform diameter and desired strength. The stretch ratio is in the rang...

Embodiment 2

[0052] Adopt the same method and test condition described in embodiment 1 to prepare the white filament of embodiment 2, and TiO 2 The addition percentage of is adjusted to 0.231%. A commercially available filament was tested as a comparison and the results are shown in Table 1.

Embodiment 3

[0054] The blue opaque filament of Example 3 was prepared using the method and test conditions described in Example 1, except that the blue pigment (phthalocyanine blue, 0.005%) was added together with 0.0999% (by weight) of TiO , to obtain the following results shown in Table 1. Use the same blue pigment in the comparison sample.

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PUM

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Abstract

The present invention discloses opaque and white monofilaments that retain tensile strength even after exposure to high levels of UV light. Monofilaments of the present invention do not become brittle even after exposure to the equivalent of three to six months of Florida sun. Monofilaments of the present invention can be useful in brushes, filtration media, monofilament fabrics, synthetic hair for wigs, doll hair, and other applications where monofilaments can be used that are stored or sold in an environment where there is a substantial degree of exposure to the sun.

Description

[0001] Cross References to Related Applications [0002] This patent application claims priority to US Provisional Application 60 / 876,839, filed December 22, 2006, which is hereby incorporated by reference in its entirety. field of invention [0003] This invention relates to opaque and white monofilaments useful in toothbrushes. More specifically, the present invention relates to opaque and white monofilaments having enhanced resistance to chemical degradation, photo-induced or thermally induced degradation. Background of the invention [0004] The manufacture of filaments for use as toothbrush bristles and methods of manufacture are known. For example, such bristles and methods of manufacture are described in US Patent 6,090,488, US Patent 5,500,975 and US Patent 5,533,227. Polyester and nylon are commonly used in the manufacture of monofilaments for toothbrush applications. Nylon monofilaments in particular have excellent mechanical properties, abrasion resistance, st...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): A46D1/00
CPCA46D1/00A46D1/0207A46D1/003A46D1/0269
Inventor M·王D·艾格龙R·A·布雷茨勒A·H·小赖德I·D·沃克A·扎法
Owner EI DU PONT DE NEMOURS & CO