DD144797A1 - METHOD FOR FASTENING FIBER ASSOCIATES WITH CELLULOSIC SELF-FIBER FIBERS - Google Patents

Abstract

The invention relates to a method for improving the Strength and surface behavior of fiber composites. goal of Invention is an economically advantageous consolidation process to develop through the use of self-bonding chemical fibers. According to the invention, the object is achieved by admixing an etherified Zelluloseregeneratfaserstoffes in the fiber composite with Mixing proportions between 5 and 50 wt .-% dissolved, whose Self-binding properties upon contact with aqueous Media are triggered. These self-binding effects are in one stabilized subsequent drying process. To this effect permanent, swelling-blocking treatment, preferably by synthetic resin, are preceded by drying.

Description

Title de T ₁ ^ Er fin OUQq ₁

Process for the consolidation of fiber composites with cellulosic self-binding fibers

The invention relates to a process for improving the performance properties, in particular the strength and surface behavior of fiber composites. This improvement is particularly aimed at yarns and textile products made therefrom, as well as nonwovens.

Characteristic of the known technical solutions

It is known to achieve the solidification and durability of the surface texture of textile fabrics by mechanical and physico-mechanical methods. "Mechanical strengthening and durability of the surface finish can be achieved by altering the construction in the web and / or fabric." ^ "FERNER:;. ..

Technology and machinery of yarn production _e Fachbuchverlag Leipzig 1968

PLOCH, BOTTCHER ₈ SCHARCH: "'·

Stitchbonding Stitch-bonding technology *

Fachbuchverlag Leipzig 1978 ^ 7.

The same effect is achieved by needle punching _# knitting and intermeshing of textile fabrics _β

/ "BÖTTCHER _β SCHRÖDER _s MOSdHLER: nonwovens Fachbuchverlag Leipzig _e 7

It is also known "to strengthen textile fabrics by applying binders in solid or liquid form and to stabilize their surface texture" / "BÖTTCHER, SCHRODER ₆ MÖSCHLER:

nonwovens

Fachbuchverlag Leipzig _e 7.

Solidification of textile fabrics by mixing thermoplastic synthetic fiber fabrics _9, the Wärtnebehand · lung and / or pressure treatment with itself and / or bond the remaining fibers in the textile fabric, may also be achieved _β / "Kirchenberger ₈ H _e J

Properties and applications of nonwovens for textile

Uses.

Malliand Textile Reports U (1976) * S _e 883 - 896J?

By admixing synthetic shrink fibers in textile fabrics with subsequent thermal or hydrothermal treatment, solidification and surface effects can likewise be achieved * / * BANK * K _e H «:

The tasks of basic research for the development of nonwovens production

Fiber Research u "Textiltechnik 28 (1977) _{e e} S 31 .- 37 ^ 7

These known processes involve a not desired in many cases, changing the textile properties of the surface structures and / or produced therefrom Final products · This increased costs by using special raw "materials and / or additional technological ProzeBstufen result (z _e as thermal treatment)."

The disadvantages of these are particularly evident in the production of nonwovens «

The aim of the invention to provide a solidification method by the use of novel cellulosic fibers with self bxndenden properties and apply ,, wherein additional and costly process steps for triggering the binding effect to be avoided and reduced the use of heat energy _e

Textile fabrics, especially nonwovens, various textile design and different fiber composition not be in any case, in practice, the requirements placed on si © with respect to

- firmness in dry and wet condition ^

- Behavior in dry and wet conditions,

- surface resistance.

A major reason for this is the insufficient adhesion of the fibers to one another.

The invention has for its object to provide an additional bond between the fibers through the use of cellulosic fibers ,, order ~ materials in particular to improve the stress-strain behavior, and the surface resistance of the prepared yarns and resulting textile products and of non-woven *

According to the invention, the object is achieved in that etherified regenerated cellulose, particularly hydroxyethyl "= Zelluibsefasern in 6 production of the spun yarn or nonwoven fabric (the fiber band) in proportions of 5 to 50 mass% is admixed homogeneously or in layers"

Upon contact with aqueous media, as the etherified cellulosic fiber passes into the swollen state, secondary valence bonds are made with contacted fibers which remain after a subsequent drying process. This strengthens the respective fiber bond in addition to the existing fiber bond forces.

The effect achieved can be blocked by incorporation of synthetic resins, for example of melamine resins, so that upon re-treatment in an aqueous medium no significant swelling and thus no dissolution of the bonds entered occurs. The invention will be explained with reference to several embodiments:

Hydroxyethyl cellulose fiber 0.17 tex / 40 mm is mixed in a mixing ratio of 10% of a conventional viscose Ü _e 17 tex / 4Ö mm in Flockeaufbereitung and after the cotton spinning into yarn of fineness 20 tex "'vef spönnen · is at dsr fine spinning machine the rotation is reduced by 10 % compared to the comparison yarn «

The yarn is then subjected to a dyeing process by a conventional method * subjected to "Through the wet treatment of caused by the reduced yarn twist strength is = · compensates loss * ~ ^r" "" """'

Embodiment 2:

Hydroxyethyl cellulose fiber 0 * 34 tex / 80 mm is blended in the production of nonwoven yarn sewing fabric in the flock blending plant at a level of 30 % _e

The nonwoven ° = Thread "Nshgev" irke is washed according to the usual finishing Techno ~ technologies _s dyed with synthetic resins _s particular, highly refined high-grade finishing the permanence ensured represents occurred increasing the strength and "surface resistance of the""t ex t ilen e r convincing η is; Outside of the w j.rä, the m easur e of the vlieS "thread-stitching veIre lowered"

The following results were determined for the nonwoven-filament stitchbonded fabric investigated:

Basis weight tear force in: transverse direction

I '' g / m ² JC ^ J

Commodity 123 12 «4 Fortigware (washed

and dried at 100 ^° C.) 136 14 _fl 9

Finished goods (highly finished) 115 10.3

The tearing force in the transverse direction is used exclusively by the

used pulp components influenced.

Yarn is weaved with 30 % HÄC fibers by conventional technology as a weft. The fabric is washed and bleached, and at the same time the binding effect is achieved. "The subsequent refining ensures the permanence of the effects". This is particularly true in improving the surface resistance such as "B " of reducing the leaching of pile loops and filaments "

Claims (5)

claims 1. A process for the solidification of fiber composites with cellulosic self-binding fibers characterized in that etherified cellulose regenerated fibers, in particular hydroxyethyl cellulose fibers in a homogeneous' mixture or in a layered arrangement with a proportion of 5 to 50 % mass used with other fibers in a fiber structure and by treatment in aqueous Solution or in steam at the transition of the self-binding fiber in the swollen state at the contact points with each other or with the other fibers Nebenvalenzbindungen be prepared which, optionally swelling blocking treated stabilized in a subsequent drying process * 2, method according to item 1, characterized in that the physical binding of the swelling-blocking treatment by the addition of synthetic resin, in particular melamine resins, is blocked against dissolution by re-swelling of the self-binding cellulosic fibers. 3. The method according to item 1 and 2, characterized in that a mechanically bonded nonwoven fabric is used as the fiber structure. 4. The method according to item 1 and 2, characterized in that a non-bonded nonwoven fabric is used as the fiber structure. 5. The method according to item 1 and 2, characterized in that a yarn is used as fiber structure. 6j method according to item 5, characterized in that the fiber composite is a yarn that already into a sheet, z "B _e fabrics, knitted fabrics, knitted fabrics, stitchbonded fabric has been processed. 7. The method according to item 1 to 6, characterized in that the triggering of the Bindaeffektes in connection with an already intended for the respective product treatment in a vaporous or aqueous medium, in particular by washing, dyeing, bleaching ·