DE2614523A1 - USE OF FILAMENTS MADE FROM NETWORKED POLYESTERS TO WRAPPING THREADS - Google Patents

Description

File number: HOE 7G / F 06G

Datura: _{April 2} , 197δ Dr.ν.F. / Ga

Use of cross-linked polyester filaments for wrapping of rovings

(Addition to German patent no. Patent application

P 24 4? 715.4 - internal number HOE 74 / F 28S)

In the German patent application P 24 47 715.4 is a roving has been proposed consisting of a sliver of fiber Staple fibers and at least one winding around the staple fibers Filament yarn. This roving is characterized by the fact that the staple fibers are untwisted and unsized and have a total titre of about 1000 to 30,000 dt ex, preferably 2 to 15,000 dt ex, and that the filament yarn has an elongation at break of less than 50%, preferably less than 25% has that the filament yarn has a titer of less than 50 dtcx, preferably less than 15 dtex, and that the roving has a half length of 15 to 500 m, preferably 30 to 300 ro, and that the number of turns is 20 to 300, preferably up to 100 per meter.

Surprisingly, it has now been found that these rovings with their excellent properties can be obtained particularly advantageously when wrapping around the staple fibers Fi lsi ment e used are those made of crosslinked polyesters are made, preferably using monofilaments will. Particularly favorable results are obtained when the polyester is polyethylene terephthalate, which is up to 0.03 1.5 Percent by weight, preferably up to 1 percent by weight,

709841/0358

26U523

in.sbeßOTK'ere up to 0.05-0.7 Gov / i cht%, based on Puf dos pure · polyethylene terephthalate, a crosslinking agent contains.

Vo \ £ -2iU vsweii; c containing the polyester as a crosslinking agent silicon compounds, such as the _c formol

v.'orin X is a hydrogen atom, a monovalent organic HeKt or an atomic equivalent of a metal, η an integer and m an integer between 0 and. 2n means. These connections and the way to manufacture crosslinked polyesters are described in DAS 12 37 727.

In another preferred embodiment, the polyesters are obtained beforehand using esters and / or salts of compounds of the general formula

0 OH

ΐ I

HO. -P- CH ₀ - CH ₀ - Si - OH -XH ₀ O, \ ι

OH OH

in which χ 1.5 or a number below 1.5 or also the value 0, the ester groups representing the radicals of lower aliphatic alcohols with 1 to 4 carbon atoms and the salt groups representing the ions of alkali metals. The production and use of these compounds is described in DT-PS 1,720,647.

Another way of crosslinking the polyesters is to use multifunctional, purely organic compounds. Suitable crosslinking components are, for example

709841/0356

26H523

Pentaerythritol, »! Pentaerythritol, glycerine, sorbitol, trimethylolethane, Trimethylolpropane, trimethylolbutane, trimethylolnexane, 1,3,5-trimethylolbenzene, 1,3,5-tripropylolbeuzene, 1,3,5-tri ~ butylolbtjuuol, 1,2,8-Ke.s.antrxt> l, 2,2,6, ö-TeLriiiiiyttivlulcyclohexanol, Hemiiiiellitic acid, trimellitic acid, trimeci-dic acid, Prehnitic acid, mellophanic acid, pyromellitic acid, mellitic acid and functional derivatives thereof such as mathyl, ethyl and Propyl or phenol ester. Also suitable are 5 - hydroxyisophthalic acid, 4-hydroxyisophthalic acid, 2,5-dihydroxyisophthalic acid, 2,5-dihydroxyphthalic acid and functional Derivatives thereof, such as "B. the ester with an aliphatic Alcohol, such as methyl, ethyl and propyl alcohol, or the aromatic ones Phenol ester.

These permanent vex * netzer can also be mixed with the temporarily cross-linking silicon compounds are used «

The wrapping filaments made from crosslinked polyesters have the properties that they have for wrapping filaments to an excellent extent of the German patent no (patent application P 24 47 715 - internal number HOE 74 / F 283) must: they must give the sliver made of untreated staple fibers sufficient strength for processing but tear when warped during the production of fine yarn, i.e. they must not have too much elongation. Filaments crosslinked polyesters exhibit this combination of properties in an ideal manner.

The quantities of both permanent and temporary crosslinkers strongly depend on the number of functional groups it contains.

709841/0356

26U523

Examples

The modified crosslinked polyethylene terephthalates were made by a batch process as follows manufactured:

Transesterification:

Glycol and dimethyl terephthalate in a ratio of 1: 2.2 are placed in a heatable pressure vessel equipped with a stirrer. At 140 - 150 °
Crosslinker added.

lays. At 140-150 ° C, the Mii acetate and the

The transesterification takes place without pressure by heating to 16 5 - 220 ° C within 2.5-3 hours. The released methanol is drawn off via a distillation column heated to 70-75 ° C. Then at a boiler temperature of 220 ° C and a column temperature of 195 ° C. approx. 2.0-2.5 1 of glycol is distilled off. Then the condensation catalyst (antimony trioxide) and the stabilizer (phosphorous) are added Acid) ο

Polycondensation:

The reaction solution is pressed at 225-230 ° C. into a condensation autoclave. Then takes place under nitrogen blanketing Heating to 240 ° C. and the start of the vacuum program. After 105 min, the full vacuum of 0.1 mm Hg is reached, while the Temperature is increased to 240-275 ° C. The melt viscosity is measured via the stirring resistance. The condensation time is 2.5-3.5 hours. The polymer melt is discharged under nitrogen.

709841 / 03S6

26U523

Example 1: Crosslinker according to DBP 1 720 647

Polymar manufacture:

0.03 percent by weight manganese acetate »4H _Q 0, based on DHr 0.008 percent by weight Sb _o 0"

0.4 weight percent TiOp

0.6 percent by weight SIP manufactured according to DBP 1 720 647, specific viscosity 0.535

Recovery point 258.5 ° C

Weaving:

The polymer was from an extruder through a nozzle with 2 holes and a hole diameter of 250 .mu.m at a diaphragm temperature from 265 ° C vind a spinning take-off of 1800 m / min. the Spun threads were wound up as a monofilament and over a Streclizv / irnmaschitie (model Zinser 16 S) in a ratio of 1: 3.1 at 90 ° C godet temperature and 120 ° C iron temperature.

A monofilament with a tenacity of 34 g / tex and an elongation at break of 8% was obtained. The thread count was down at 8 dtex.

The obtained monofilaments were used to wind a roving as used in German patent application P 24 47 715 “4.

There were wound rovings with the properties specified there.

709841/0356

26U523

Example 2 : Trimethylolpropane crosslinker

Polyraer production:

0.03 percent by weight manganese acetate · 4HpO 0.015 percent by weight phosphorous acid 0.03 percent by weight antimony trioxide 0.4 percent by weight TiO ₂ 0.3 percent by weight triraethylolpropane specific viscosity 0.620 softening point 257 ° C

Spinning:

The spinning took place as in Example 1 at a nozzle temperature of 270 ° C and a draw ratio of 1: 3.65 »The thread strength is 32 g / tex with an elongation of 14% and a single thread denier of 5 dtex.

Wrapping a roving with this monofilament after Standard registration resulted in wound rovings with the ones specified there advantageous properties,

Example 3: Crosslinking agent pentaerythritol

Polymer manufacture:

0.02 percent by weight manganese acetate · 4H “0 0.01 percent by weight phosphorous acid 0.03 percent by weight antimony trioxide 0.4 percent by weight TiO ₂ 0.2 percent by weight pentaerythritol Specific viscosity 0.61 softening point 258.5 ° C

709841/0356

26-523

The Vovapiitn'ir = «he followed aun loij liyirpiol 3. ho.i oh .. · ,. tcnpei'iiiur of 2VO ° C tüiil a Vci '^ tiiickv.x-liiiltni.-. vc :.

JL - - *, <- ". I '-'. Ϊ́ί ί .. Γ;,.; ..:. I. _{" .. r .-. I>} ^{ir.i.- s} .l. »I -i.- tj. j -. ^ ■ - us (; / ι!, Λ U '.- X AU

i ', imd clnoiu Kinf / Xrlxad ^ ntltt;.! * by V cito.:.

The Ui.'vvinclunii uLrui, - Υοτί, ίχνηον ran like Jiuch dc .ν Si melduiij.

709841/0356

Claims (6)

26H523 HOE 76 / F OCiC, PATENT CLAIMS: 1. Use of filaments made from cross-linked polyesters s-uin wrapping of roving according to the German patent no, (Patent application P 24 47 715.4 - internal Kummer ΠΟ32 74 / F 288), 2. Use of Fi. lament en according to claim 1, dadui oh characterized, that the filaments are IvicuGfiliiwcate. 3c use of filaments according to claim. * Xich 1 and 2, characterized by g-v, then the polyester is Polyäthyletttere]> hi; halat, the 0, O3 - 1.5 weight percent, inslio & 'ondere up to 0.05 0.7 Percentage by weight, based on the pure polyethylene terephthalate, a networking agent contains. 4. Use of filaments according to claims 1-3, characterized by d &: & the polyesters using esters and / or salts of compounds of the general formula 0 OH * I HO-P- CH ₀ - CH ₀ - Si - OK -xH _o 0 I ²² I ² OH OH have been obtained in which χ 1.5 or a number below of 1.5 or auc23 means the value 0, the ester groups being the radicals of lower aliphatic alcohols with 1-4 Carbon atoms and the salsgroups represent the ions of alkali metals, 5. Use of filaments according to claims 1-3, characterized in that dß3i the polyester with a connection dex " formula (X ₉ O) _1n (SiO ₉ V ORIGINAL INSPECTED 709 R 4 1/0356 26Ü523 - ^ - HOE 76 / F 066 is negated, in which X is a hydrogen atom, a monovalent organic radical or an atom equivalent of a metal} 5 ;, η a ριη ^ σ Zalxl and η an integer between 0 and 2n 6. Verv.'ondung of Filai;, ducks according to claims 1-3, characterized in that that the polyester is more functional alcohol or multifunctional organic acids. 7098A1 / 0356