Method for the treatment of aramid material and fiber, yarn, and fabric made thereby

a technology of aramid materials and aramid fibers, applied in the dyeing process, textiles and papermaking, etc., can solve the problems of difficult dyeing of aramid fabrics, affecting the degree to which the fiber may be dyed, and difficulty in giving such aramid fabrics the general appearan

Inactive Publication Date: 2016-07-28
EI DU PONT DE NEMOURS & CO
View PDF3 Cites 1 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

From U.S. Pat. No. 7,156,883 it is known that aramid fabrics are more difficult to dye than traditional apparel fabrics, and the percent crystallinity of aramid fiber dramatically affects the degree to which the fiber may be dyed.
It is especially difficult to give such aramid fabrics the general appearance of a cotton denim fabric due to the differences in aramid fiber crystallinity.
The simple addition of cotton, by blending cotton fiber with the meta-aramid fiber, does not provide a suitable solution to this problem.
This makes any protective apparel made from this fabric less comfortable than apparel made from the untreated fabric.
Even if the process to obtain such batches of products is normally identical and carried out under the same conditions (for example in terms of temperatures and pressures), it cannot be ensured that the yarns obtained from such batches have identical end properties.
In fact, variations in the crystallinity index of the different

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

Image

Smart Image Click on the blue labels to locate them in the text.
Viewing Examples
Smart Image
  • Method for the treatment of aramid material and fiber, yarn, and fabric made thereby

Examples

Experimental program
Comparison scheme
Effect test

examples

[0044]In the Examples, the step of scouring, both in the separate and integrated type of treatment, was carried out in the presence of Tinoventin JU® at the conditions listed in Table 1.

[0045]In Example 1, the step of scouring was carried out separately and prior to the step of pretreatment. The step of scouring was carried out in a AHIBA™ Turbomat from Datacolor Ahiba, Switzerland, headquartered in Lawrenceville, N.J., USA. The step of pretreatment was carried out in water only, at the conditions listed in Table 1.

[0046]All Examples 1, 2, and 3 were dyed according to the following procedure (color royal blue):[0047]Set the dye bath with warm (30-40° C.) water and add[0048]70 g / l Benzyl alcohol[0049]1-2 g / l non-ionic dispersing agent[0050]Run for 10 minutes and then add[0051]1% Basic Blue 41 (dissolved in boiling water and acetic acid)[0052]Run for 10 minutes and then start to heat with 1.5° C. / min[0053]Add during the heating (between 40 and 80° C.) in 3 portions[0054]20 g / l sodium ...

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
Temperatureaaaaaaaaaa
Fractionaaaaaaaaaa
Fractionaaaaaaaaaa
Login to view more

Abstract

This invention relates to a method for providing a dyed meta-aramid material, wherein said method comprises at least a step of pretreatment of the material and a subsequent step of dyeing the material, characterized in that the step of pretreatment is carried out under closed conditions, in the presence of an aqueous medium, and at a target temperature of 80 to 130° C. This invention also relates to fibers, yarns, and fabrics obtained from this method.

Description

[0001]The present invention includes the technical field of treatment of dyeable meta-aramid materials, for example fibers known under the trade name NOMEX®, and yarns and fabrics made of such fibers for use in the fabrication of protective articles such as fire protection clothing.[0002]U.S. Pat. No. 7,156,883 to Lovasic & Maini relates to a blend of fibers for use in protective clothing, a lightweight fabric made from such blend, protective articles made from the blend or fabric, and methods for making the fabric. The protective fabrics and articles of this invention have the unique combination of being comfortable, being highly effective against electrical arcs and flash fire hazards and having a pleasing appearance. Specifically, these fabrics can be processed to give the look and feel similar to conventional clothing fabrics such as denim fabrics. U.S. Pat. No. 7,156,883 discloses a fiber blend that comprises amorphous meta-aramid fiber, crystallized meta-aramid fiber, and flam...

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): D06P3/24D06P5/20D06P1/00
CPCD06P3/24D10B2331/021D06P5/2072D06P1/0008D06P5/002
Inventor CAPT, ANDREMUNOZ, EDUARDWYSS, KURT HANS
Owner EI DU PONT DE NEMOURS & CO
Who we serve
  • R&D Engineer
  • R&D Manager
  • IP Professional
Why Eureka
  • Industry Leading Data Capabilities
  • Powerful AI technology
  • Patent DNA Extraction
Social media
Try Eureka
PatSnap group products

Browse by: Latest US Patents, China's latest patents, Technical Efficacy Thesaurus, Application Domain, Technology Topic.

© 2024 PatSnap. All rights reserved.Legal|Privacy policy|Modern Slavery Act Transparency Statement|Sitemap