DD244372A1 - METHOD FOR PRODUCING LONGFLOOR-LINKED TEXTILES FLOORING - Google Patents

Abstract

The invention relates to electrostatically flocked textile floor covering with increased pile length. Flocked textile floor covering is to be produced using flock fibers of a length of 3.0-8.0 mm in a high pile density and with a carpet-like commodity character. For this purpose, flock fibers are pretreated at temperatures below 323 K, activated and dried and introduced via dosing a Beflockungsvorrichtung at a field strength of at least 3 KV / cm and an electrode spacing of at least 20 cm in the Beflockungskleberfilm a prepared carrier material.

Description

Field of application of the invention

The invention relates to the production of flocked textlien floor covering with increased pile length.

Characteristic of the known technical solutions

Various methods for producing flocked textile floor coverings of various qualities are known (DD-PS 134880, DD-PS 153954, DD-PS 153955, DD-PS 157425).

However, all of these methods, regardless of the type and preparation of the flock, adhesive and carrier material used, are limited to flock lengths of at most 3.0 mm, preferably 2.0 to 2.5 mm. Even though the patent literature sometimes indicates larger flakes, it has not yet been technically possible to produce flocked textiles in sufficient flock density and with the necessary performance properties and to bring them to the market. Procedures that work in practice with flock lengths above 3.0mm (for example, flocking a Japanese firm against gravity) are used either to produce fur and fur imitations and similar products that are not made the high utility value of textile floor coverings, or so-called dust mats and of similar products using extremely coarse denier bristle-like flock fibers.

Object of the invention

The aim of the invention is to produce flocked textlien floor covering with longflock high pile density, which has a soft carpet-like merchandise character.

Explanation of the essence of the invention

The essence of the invention is to flock textlien floor covering with a flock density of at least 250g / m ² using flock fibers of a length of 3.0-8.0 mm and an elementary unit of 1.7-3.5tex while securing the necessary characteristics how to produce abrasion and tetrapod value.

With the methods practiced so far, which have a similar purpose, it is not possible to achieve the required flock density, which is due to the nature of the fibers used and to the flocking conditions.

The production of a flocked with long flock textlisch floor covering high pile density was done so that on a substrate, preferably a Nähgewirke based on polymer blend a Beflockungskleber, preferably PVC paste, applied and with flock fibers, preferably PA6, electrostatically flocked and post-treated and before the Beflockungskleberauftrag or After completion of the flocking process, a back coating, preferably foam coating based on BS hot-polymer latex, is applied and vulcanized.

For this purpose, the flock fibers are cut from raw white or spun-dyed cable of 1.7-3.5 tex staple with a maximum shrinkage of 5% and a Ε-module of at least 800MPa in a cut length of 3.0 to 8.0 mm, optionally with dyed a low temperature dyeing process, subjected to washing and activation according to a known recipe at a liquor ratio of at least 1:30, at temperatures below 323 K. After centrifuging, the flock fibers are dried with air to less than 6.0% residual moisture and then fed to a flocking with multiple dosing and sieves with a free mesh size of 2.5 to 5.0 mm at a field strength of at least 3 kV / cm and an electrode population of at least 20 cm partially, largely vertically into the flocking adhesive film of the prepared carrier material, which is guided by the flocking introduced. The aftertreatment is carried out in a known manner.

To further increase the utility value, there is also the possibility of introducing a Stützflors such that are fed through the last in the direction of travel, preferably 33% of the existing metering, flock fibers lesser cut length, preferably 2.0-3.5 mm, the same or greater fineness of the flocking process ,

Depending on the use of such flock fibers shorter cutting length than Stützflor the possibility is also created to use flock fibers of 3.0-8.0mm cut length in the first to maximum zuvorletzten metering position, which are prepared using pretreatment temperatures above 323 K.

It has been found that the carpet-like character is particularly emphasized when bicomponent fibers and / or profiled fibers, preferably hollow round or 4H profile, or when securing a maximum pretreatment temperature of 303K high shrinkage fibers are used.

In the context of achieving high color uniformity, coloring of the flocking adhesive used is recommended by known methods.

For the improvement of the tread elasticity in particular, the flocked textile floor covering receives an elastic back coating in a thickness of at least 3 mm, preferably 6 mm.

The inventive combination of process steps creates the prerequisite for the production of high-quality electrostatically flocked textile floor coverings with longflock high pile density.

The invention will be explained using exemplary embodiments. ,

Embodiment 1

Made of PAe flock fiber cable, profile hollow, round, shrinkage 3%, modulus 950 kPA filament size 2.0tex raw white flock fibers are cut 4.0mm and parallel 2.3mm. While the 2.3 mm fiber is colored according to conventional technology with acid or 1,2-metal complex dyes in the HT dyeing machine to the required color and then rinsed, activated, centrifuged, dried and sieved, the further processing of the 4.0 mm fiber ecru. For this purpose, it is first washed at a liquor ratio of 1:40 at 313 K with water, activated with synthetic tanning agents, potash alum, common salt and an antistatic agent at temperatures of 292-297 K, centrifuged to 20-25% residual moisture and air with room air 292-297 K dried and sieved through vibrating screens of 2.5 mm mesh size.

The flocking device used has 8 dosing positions, whereby 6 are fed dyed with 4mm raw white fiber and 2 with 2.3 mm fiber. The mesh sizes of the metering screens used are 3.15 mm in positions 1-6 and 1.4 mm in positions 7-8. The electrode distance is 25cm, the applied high voltage 8OkV.

The support material made of non-woven fabric-filament-knitted fabric prepared with a foam backing of BS hot-polymer latex in a thickness of 6 mm and on top with a PVC paste as a flocking adhesive is passed through the flocking device, flocked and after-treated.

It is a dense, the requirements of a floor covering fair, soft pile achieved.

Embodiment 2

Flock fibers are 6,0mm long and washed at a liquor ratio of 1:30 at 313 k with water with the addition of a solvent-containing detergent, with synthetic tanning agents, potassium alum, sodium chloride and an antistatic agent at temperatures of 292-297K activated, centrifuged and dried with room air from 292-297 K to 4% residual moisture and then sieved. The flock fibers treated in this way are fed to 6 metering positions of a flocking device and injected into the flocking adhesive through metering sieves with a mesh width of 3.2 mm via an applied high voltage of 8OkV at an electrode spacing of 25 cm. The flocking adhesive is colored with 1,2-metal complex dyes dissolved in cyclohexanone. The execution of the carrier material and the aftertreatment - analogous to Example 1.

Embodiment 3

From PA6 cable unprofiled fibers 3.0tex raw white flock fibers are cut 4.0 mm and 2.3 mm long and pretreated as in Example 2 and dried at 360 K to 4% residual moisture and then sieved. The flocking process is carried out as in the embodiment 1.

Claims (5)

Invention claim: 1. A process for the production of longflock flocked textlisch floor covering high pile density by a carrier material, preferably a Nähgewirke based polymer blend film, a flocking adhesive, preferably PVC paste, applied and with flock fibers, preferably from PA 6, electrostatically flockt and post-treated and Vorlaufungskleberauftrag or After completion of the flocking process, a back coating, preferably foam coating based on BS-Warmpolymerisatlatex, applied and vulcanized, characterized in that the flock fibers from raw white or spinngefärbem cable elementary unit of 1.7-3.5 tex with a maximum shrinkage of 5% and a Ε-module of at least 800 MPa cut in a cut length of 3.0 to 8.0 mm, optionally dyed with a low-temperature dyeing process, a wash and a known formulation activation at a liquor ratio of at least 1:30, at Tem subjected to centrifugation with ambient air to below 6% residual moisture, then fed to a flocking device with several dosing positions and through sieves with a free mesh size of 2.5 to 5.0 mm at a field strength of at least 3 kV / cm an electrode spacing of at least 20cm partially, largely vertically in the flocking adhesive film of a prepared carrier material which is passed through the flocking machine, introduced and post-treated in a known manner. 2. The method according to item 1, characterized in that the flocking fibers of the cut length 2.0-3.5 mm equal or greater fineness are fed to the flocking process by the last in the direction of travel last metering positions of the flocking machine, preferably 33% of the total metering. 3. The method according to item 1 and 2, characterized in that, depending on the use of flock fibers of shorter cutting length in the last direction in the direction of travel dosing, also Flöckfasern of 3.0-8.0 mm cutting length, prepared using pretreatment temperatures over 323 K. were used in the first to a maximum of the penultimate dosing position. 4. The method according to item 1 to 3, characterized in that preferably used as flock fibers bicomponent fibers and / or profiled fibers, preferably hollow round or 4H profile or hedging a maximum pretreatment temperature of 303 K Hochschrumpffasern. 5. The method according to item 1, characterized in that the flocked textile floor covering receives an elastic back coating in a thickness of at least 3 mm, preferably 6mm.