DE1660301C3 - Process for the production of crimped composite thread from polyamides - Google Patents

Description

m Verl. nis ^{// Λ VS} (//.V = pro'ontualer ki> c!

^ hrumpf Jer holier shrinking kiimponente um!

The trend / ur \ erhesNerten fit of the clothing \> percentage shrinkage of the few!

The article of manufacture is becoming increasingly dependent on the way in which it is caused by the shrinking component

Consignment of Bauschsiarnen taken into account. Der- dal.i with increasing / ahlenvvert of the above \ received

like bulky yarns that are both voluminous and good nisso the crimp contraction increases,

are stretchable, can be made of one-component threads Fs that the height of the kräusclbögen around

after different ·. ¹ ! ' known procedures. beispicU .se- is smaller. the higher the shrinkage the stronger

wise according to the wire method or because of the 25 shrinking component. Using the

Edge curling methods are produced. Fs highly modified, non-isomorphic cocondensates

has also been proposed, e.g. B. in tier as Hochsehriimpfverbindungen of composite thread

German interpretation document 1 202 ^ς ) 32. from different, therefore, results in a crimped thread with a relatively low volumino-

Synthetic raw materials are curable / viscous.

to spin component composite threads. The frill! - 30 The object of the invention is to create a

ability of this thread is based on the difference in the production of crimped two-component

i: h.n shrinkage capacity of the whole thread! en composite threads made of linear, high molecular weight poly-

length of aneinatider-adhering components. For two-amides.

components- \ ebundl'ädeii, whose two components- This task is Hei a method for the creation

len a.is polyamides, there are already several crimped composite threads made of linear.

Combinations become known. These can be high molecular weight polyamides by stretching the

to be classified into two groups: composite thread and thermal treatment of the same

In the first group, crystalline homopoly- if necessary after its processing into fabrics.

amide or isomorphic, likewise crystalline copoly knitted fabrics or staple fibers, according to the invention there-

amides against other homo- or isomorphic copoly- 40 solved by that one as composite thread components

amide spun into composite thread. Such composite polycaprolactam with a solution viscosity of 2.0

pairs of elements are in the British patents up to 4.0 and polylaurolactam with a solution viscosity

930 629 and 969 110. They give throughput from 2.0 to 4.0 when used.

away threads with comparatively poor crimps- If polylaurolactam is spun, for example,

ability, because the difference in shrinkage of the component 45 its relative solution viscosity in 1% m-cresol

ten is not big enough. solution is 2.0 to 4.0, preferably 2.2 to 3.0,

The second group includes two-component components together with one that can be spun from the melt and Composite thread, one component of which consists of a material that crystallizes well during spinning or drawing Homopolyamide or an isomorphic copolyamide, polycaprolactam to two-component composite threads, the second, on the other hand, from a non-isomorphic mixture is obtained directly, i.e. H. by a simple expanded polyamide The mixed polyamide is preferably operated at room temperature for various uses the basis of the homopolyamide starting product sets areas useful voluminous, even under conditions first component (for example caprolactam) load well-puckered composite thread with an overlaid is. surprisingly high crimp elongation and with a low

The use of such, non-isomorphic 55 gene shrinkage levels, the two components of which are crystal-

Mixed polyamides, as they are, for example, in Austria. Preferably, according to the method, such

Rich patent specification 240 517 are described, two-component composite threads are produced in which

has many disadvantages. So the component ratio 25: 75 to 75: 25 can be sufficient

Shrinkage differences can only be achieved if the weight is important. A characteristic feature is

the modifying portion 30 to 50% of the cocondium 60 that both components after stretching

sates is. In addition, since the poor crystallization- room temperature which corresponds to the homopolyamides

showing co-condensate as more shrinking and quieter X-ray crystal reflections. Will the

therefore load-bearing component in spiders in stretching at temperatures of 20 to 150 ° C.

If an excess must be used, if it is necessary, then the stretching is expedient

by special procedures, such as relaxation 65 at higher temperatures over a heated one

stages carried out under the action of heat during the stretching mandrel. The use of the poly

stretching or after stretching, on the one hand a laurin lactams enables a production of

crystal-like state in the mixed polyamide two-component crimped threads without additional fi

four-: xler Relaxaiioninperali '-nen / ur i rmedriüuni; des vhruir.pfniveaiis l./u. ki> Jwh! "i;mpfes' der zur I r / eugimg an Ouasi-kn-talh: ;; ial AU üiil knsiall: -« learning l'olvcarpolaciam becomes a solclies r ,; \\ relative I ii - iingsv iskosuälen from 2.ti to 4.0. preferably 2.π to. '. 2. used.

\ orieilervweise d: e ί aiier. via a Niavkdorn heated to γι h's Id (I C ver> irev.ki.

A ¹ JS den '. erfanren-igemäl.i received loading: ', can Vrumpk. Knitting. Active and We'iwaicn. Carpets and Aii - .; Lüewa ^r en made v.crdcn. C ιjiie! ~ Eneni'alU! ■ .i'in such goods are manufactured from the nodi not iickiaiiscllen 1 "filaments, whereby the kraii ^ eking IK..ii the 1-packing of the goods is then carried out.

example 1

Polylaurolactam with a relative solution viscosity of? .- 'in 1 weight percent m-cresol solution and polvcaprolactam with a solution viscosity ν! 40:60 are merged. The shop, whose cross section, is made up of two interconnected i; consist of adhering components with different diameters, are wound up after passing through a 25 C air shaft at a speed of 700 m min. In a Rohtitcr of 150/12 to uie threads are then m with a stretching speed of 00 · Γ 1 .in in a ratio I: 21; 4 hei 20 C and 65 '\ _O rt !. Air humidity stretched.

For determining the Kr; With this parameter, a strand made from the drawn threads is loaded with 0.2 g / den and the length (α) is measured. Thereafter, the weight is replaced by a second, the only mn strand mg ii.fö the burden !, and eggs so hei.tstetc strand and m of water ^ c r immersed such that the load / u none / e; t subsides. After 5 minutes, the strand is removed from the water bath and its length after drying for 24 hours at 22 C "and 50" rel. Moisture (/> l measured. Subsequently and the strand loaded again with the first weight and its length ii) determined again. Mi: the measured eyes (, ·. H and r we get the

C / '

Ripple line ("„) ■ 100 ^l ->:>

and the

Cooking shrinkage 1 "") "'· KH) ⁽ ).

(I.

For determining the curl height and Kiäuselbogen length been brought up to the state /) Threads projected onto white paper under magnification and measured. For the threads of this For example, the following average values are obtained: Height of curling arch: 0.3 mm, length of curling arch: 0.5 mm.

According to the above example, two-component composite threads were made from various homopolyamides produced and the Krausei parameters determined. The polyamides used and those obtained on the composite thread The results are summarized in the table, where

PA 6
PA 66
PA 12
PA 11

means.

Poljcaprolactam,

Polyhexamethylene adipamide,

Polylaurolactam,

Polyamidans aminoundecanoic acid,

table

1st component '/ r, ·; 2nd component '/ rel. Weight Cook Ripple Comparison ratio shrink strain attempt 1st comp. KS ° / o KD '/. No. PA 6 2.72 PA 12 2.68 to PA 6 2.72 PA 11 2.29 2nd comp. 9.5 70 1 PA 6 2.72 PA 66 2.60 1: 1 11.0 40 2 PA 66 2.60 PA 11 2.29 1: 1 12.3 2 3 PA 66 2.60 PA 12 2.68 1: 1 8.9 14th 4th 1: 1 9.0 13th 5 1: 1

From the comparison tests, the advantageous combinations are not based on just a gradual improvement Crimping properties of the threads according to the invention are based on the properties of the threads, but in one in a clear way. The table also shows 55 surprising, abrupt increases in the frizziness the advantages achieved over known grain elongation are based.

Claims (1)

i 660 301
ϊ 2 component to discover and on the other hand not to Ρ, · ■; ,,., Η-, ρ, -uJ, portable high heat shrinkage of the \ erhundllachei- \ crt - ^: -.r, T. to HerM-llum: uekräi.-du-r \ ei hund- 'Hnc 11, -rabsel / une of the high shrinkage level. da * laden .u hnearen high molecular weight I'oKamukn 5 pc · / «eikomponcnienladen with one component dur.ii W-rMreckcn dc V orhtmdl.idc - and -.i.cr- v.-rhälmN χ on!:! by half the sum of koch m, .J-.c treat de-elrcn .e.enenenfall- na.h ·.:,: umpie of both ;. > oniponenien vviedergegehe,, "ncr Wi ₁ : be, um- / u Ceu, -hen. Knitted or u, approx. im also therefore c rderheh. because even K- '·!., - M rx-llascm thereby - ese η η / e ι c Ii η e ι. u \ -folien SchrLimpfdifierenzen \ on 10 '"and pl ·. ■ that one has ai \ erhundladenenkomponenien Pol> ca- : - ■ under load only n.al'.ig krauselkc-nlraklionsJsraluprolaciam m: l.ö.un »^ ^ koMiäi son 2. (1 P; - developed« earth, v.ennder the boiling shrinkage of the niedn, 4 ιι and PoMaimnlaclam with a 1 ömiiiü-m ^. ^ - shrinking Komponenie / u hoch lsi. Use the krausei iäi οι- ^Λ n up to 4 0! ! :! Aevi component fadeii. those in the cross-section 15 overlapping crescent moons of the same area ..