DE1660514B1 - Synthetic composite thread made from two different materials - Google Patents

Description

1 2

There is a growing demand in the textile industry. position of homogeneous threads also known, may be on fabrics that are on the one hand non-iron or on the other hand there are no threads that make this easy to iron are, on the other hand, body exhaustion is only contained in the outer covering, the one soak up energy or excretions (sweat). Surrounds core made of a different plastic. In the As is known, however, these two own drawings can be shown

shafts in a single material are practically impossible. FIG. 1 shows a composite thread according to the invention

unite, because the precondition for freedom from stirrups in the cross-section,

The lowest possible absorption capacity for Fig. 2 is that which can be used for its production

Water, d. H. low absorbency and swelling spinneret in longitudinal section.

availability of the fiber. Thus, various art- io The composite thread according to FIG. 1 consists of the fibers, in particular fibers and yarns based on a polyester core A made of polyamide or polyethylene terephthalate, e.g. those made of polyethylene terephthalate, and the sheath B made of a mixture of a poly with an extremely low absorbency for water or amide, which is preferably the same, the aqueous fluids and are therefore the ideal case for the core A , with PolyMaterial for non-iron fabrics, but only 15 pyrrolidone or polyvinylpyrrolidone are suitable,
bad for the production of fabrics or knitted fabrics In the section of a ken shown in Fig. 2, which grains directly in contact with the skin spinneret plate are two separate inflow lines men, such as underwear, shirts, blouses and the like, since 10 and II provided, which feed the actual spinning in these cases a certain minimum amount of suction nozzle 12 in such a way that the desired bondability is required. 20 thread according to Fig. 1 emerges. Such nozzles or

Therefore, substances from nozzle plates are known for such purposes and are not the subject of the

Mixing elements or threads used resulting from an invention.

Mixture of synthetic and natural (e.g. spinning takes place in principle according to known Cotton) staple fibers. However, since the methods. By appropriately dimensioning the nozzles short fibers formed yarns those from 25 passes and metering the inflow of the two endless single threads in some relation under- together for the purpose of forming the desired interlacing there is still a need for continuous components that can be spun lent spun synthetic threads, the proportions of which are determined in advance. Advantages of high strength and good shape If one takes into account that the outer shell is not or resistance in the wet state are associated with 30 only to a limited extent in terms of the mechanical strength of the at least the same degree of absorbency as the item of clothing and, above all, its consistency Substances is required for the above purposes. strength and crease resistance. So it is clear

It has now been found that the apparently that the outer constituent is quantitatively within contradicting problem of the union of two so that to achieve the desired absorbency contradicting properties such as freedom from ironing and 35 necessary limits is maintained. Especially pre-suction ability can be solved by the fact that it is part of it when the outer absorbent component Fabrics used purely synthetic composite threads, at around 20 to 40 percent by weight of the total weight which are made up of a high tensile strength and non-swellable core around the yarn.

is given by a relatively absorbent jacket, with this preferred range of quantity

to which he adhered to a uniform, continuously spinning ratio, then one from the invention

process manufacturable endless thread forms. fabric made according to composite yarn or

The synthetic composite thread knitted according to the invention practically the advantageous properties of the fabrics produced with a core made of polyamide or polyethylene- exclusively with less absorbent yarns and a concentrically surrounding the core, since the synthetic component with the giving coat made of another synthetic 45 low absorbency in terms of weight the verMaterial is characterized in that the sheath predominates in turned composite yarn,
from a mixture of a polyamide with polypyrrolidone. In the manufacture of the composite yarn, there must be natural or polyvinylpyrrolidone. It should be noted that the too essentially

Synthetic threads, in which two different material concentric structures are to be united plastics

lien to a core and this concentric 50 under the same pressure and temperature conditions

surrounding sheath are spun are known. have to be spun in order to develop the

In the German patent 736 321, for example, a wish is symmetrical with respect to the Garnachse.

drive and ensure a device for making such a structure see.

Synthetic threads from multi-hole nozzles described, whereby the invention is still more practical with the aid of some

however, only cellulose-containing threads are mentioned 55 exemplary embodiments are explained in more detail,

and the union of the non-swellable, shapeable. -,.,

permanent thread core and absorbent sheath not Example 1

mentioned. A nozzle of the type described were 15 to

Composite threads with coarse, 25% strength polymer solutions in N-N'-dimethylacetamide are also known

somewhat wool-like surface, in which core and 60 were fed, and that was in the lines for bil-

Sheath made of polyethylene terephthalate from various dung of the core a solution (a) of a polyamide, the

ner viscosity and the jacket has a filling by condensation of isophthaloyl chloride with

having substance content. When the known low m-xylylenediamine had been obtained and in the

The absorbency of the polyester is such threads for lines to form the sheath a solution (b)

Substances to which the above-mentioned requirements 63 of the same polyamide as under (a), mixed with

not suitable. Polyvinylpyrrolidone, initiated. The thread was

Incidentally, the use of mixtures from at a temperature of about 130 ° C from one

Spun a polyamide and polyvinylpyrrolidone, Mr. material with a viscosity of 1.6. the

The outer sheath of the yarn obtained was 30%> des Total weight of the thread.

The absorbency practically corresponded to that of threads produced from a conventional manner Mixture of polyester and cotton fibers.

Example 2

The procedure was as in Example 1, the injection mold being fed with the following polymer solutions became:

a) the lines for forming the core with the polyamide according to Example 1;

b) the lines for forming the jacket with a mixture of a polyamide and polypyrrolidone obtained by condensation of adipic acid and hexamethylenediamine.
There was obtained a thread with excellent water absorbency equivalent to that of mixed threads of polyester and cotton fibers.

Claims (1)

Claim: Synthetic composite thread with a core made of a polyamide or polyethylene terephthalate ίο and a jacket made of another synthetic material concentrically surrounding the core, characterized in that the jacket is made from a mixture of a polyamide with poly-pyrrolidone or polyvinylpyrrolidone. 1 sheet of drawings Copy