DE2341687A1 - NYLON SPIN FINISHING COMPOUNDS - Google Patents

Description

r> R. ING. E. HOFFMANN · DIPI ,. ING. W. EITLE DR. RER. NAT. K. HOFFMANN

PATENTANWÄLTE O-8000 MÖNCHEN 81 - ARABELLASTRASSE 4 TELEPHONE (0811) 911087 OQ L 1 CQ * t

24 284

ICI America Inc., Wilmington, Del. (UNITED STATES)

Nylon spun finishing compounds

The invention relates to textile lubricating masses for nylon fibers that resist decomposition and smoke are resistant to high temperature applications and normally the application of subsequently applied Do not adversely affect polyacrylic acid finish coatings.

In the production of yarns suitable for textile processing, the application of a lubricant is essential on the threads to allow processing of the yarn with minimal difficulty. It is known that

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the choice of a suitable lubricant mass is not easy because of the yarn _f many different demands on the lubricant mass by the type of end use and the production method. In high temperature processing, the formation of hard, insoluble resins and the fuming of the finish when touching heated surfaces is a particular difficulty. Normally, these surfaces are heated above the boiling point of water, which is a major solvent for many dope and does not cause health problems in the processing equipment surrounding atmosphere can be drained. However, either as a result of their decomposition or because of their content of volatile components, most compounds form harmful gases which impair or irritate the personnel working on the equipment.

Previously required the use of high temperature spinning finish compositions an additional washing step to remove these from the fiber before applying polyacrylic acid finishes or finishes, as they were not compatible with the finish coating.

According to the invention, a Verspinnungsfinish is provided, which consists essentially of 30 to 50 wt .-% of a lubricant, which is selected from soybean oil, coconut oil or 1, 1,1-Trimethylolalkantriestern of fatty acids having 8 to 10 carbon atoms; 1O to 3O% 1-hydroxyethyl-2-heptadecenyl-imidazoline as an antistatic agent and 20 to 60% by weight of one or more of the following emulsifiers: polyoxyethylene (20) - sorbitan monolaurate, polyoxyethylene (8) nonylphenol, polyoxyethylene (40 ) sorbitol hexaoleate. This composition can be used in an aqueous dispersion of 1 to 35% by weight of the finish.

With the usual yarn production from polyhexamethylene adipamide, Polycaproamid or other known nylon compounds that

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are primarily intended as weaving yarns, the nylon comes into contact with a large number of heated rollers or cylinders. At a typical process, the nylon polymer is melt spun and the resulting strands of thread are passed around a roller, which has at least one surface immersed in a bath of lubricating finish. Those leaving the finish roller Strands are brought together by a guide. The yarn is then fed through a feed roller to a drawing needle and then fed to the first stage take-off rollers. At this stage, some of the total stretching is required to be done has applied. The yarn then passes through a heated tube and from here to a take-off roll of the second stage, where the remainder of the stretch is imparted. The drawn yarn is then wound up in the usual way. The heated pipe referred to above, can be used to preheat the yarn as it is passed over the take-off rollers of the second stage to serve. A typical hot tube temperature is in the range of 185 to 190 ° C. The second stage take-off rollers are heated to 225 ° C. This temperature is used to volatilize part of the finish that is present on the yarn, and aggravates or worsens the oxidizing conditions, which leads to the formation of rubber or resin. During this process the atmosphere around the take-off and spinning equipment is filled by the decomposition substances of the finish components, which are serious irritants to the workforce. When using the finish compound according to the invention the downtime of the equipment is significantly reduced, thereby making the operation and the performance of the operation more effective required personnel is increased.

Before weaving nylon fabrics, a film-forming j Material called finishing or sizing on both spun and filament yarns in a sizing called sizing Work process applied to consolidate and protect these yarns from the frictional effects of the weaving process. Although Finishes based on starch and gelatin for many years

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have been used on regenerated cellulose and acetate yarns, these finishing materials will work on nylon yarns due to a combination of poor yarn wetting properties and a lack of proper adhesion between the finish and the yarn inappropriately. Furthermore interfere with many spinning finishing systems that are used In order to ensure suitable spinning, stretching and packing of the yarn, the following is the correct adhesion of the finish on the yarn. Polyacrylic acid finishes have been developed which are excellently suited for nylon thread applications Adhesion properties mainly due to the formation of a chemical bond between the carboxyl groups of the polyacrylic acid and the amido groups in nylon. Various manufacturers produce a full range of polyacrylic acid finishes, which vary in their molecular weight and / or the use of copolymers or additives. They are finishes for specific nylon fiber applications such as low molecular weight polymers (5,000 to 50,000) for easy · Incorporation in large fiber bundles compared to high molecular weight materials (50,000 to 250,000) for use in Finer denier nylons have been developed. Such materials are available as aqueous solutions. Finished yarns show usually coatings of polyacrylic acid varying from 0.5 to 2 percent by weight of the yarn.

The known finishing compounds, such as those in U.S. patents 3,464,922; 3,402,127; 3,575,856; 3,338,830; 3,428,560; 3,421,935 normally contain a combination of ingredients that act as lubricants, antistatic agents and emulsifiers. These are for the above stated purposes either because they are incompatible with the polyacrylic acid finish or because they are not suitable Wise to serve as a lubricant at high temperatures or because they cause excessive smoke, detrimental.

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The masses according to the invention are produced by mixing the components to produce a homogeneous solution. Each of the components used is commercially available and, as it is available, can be used in the invention without special ones Treatment can be applied. For example, a commercially available lubricating vegetable oil such as soybean oil and Coconut oil or tri-fatty acid ester, such as capryl, pelargon, Capric acid esters and their mixtures of 1,1,1-trimethylol ethane or trimethylolpropane with commercially available antistatic agents such as quaternary diethyl sulfates of i-hydroxyethyl-2-heptadecenylimidazoline and then with 20 to 60% of one or more of the following emulsifiers such as polyoxyethylene (20) sorbitan monolaurate, Polyoxyethylene (40) sorbitol hexaoleate and polyoxyethylene (8) nonylphenol be mixed.

The finish is normally applied to the nylon thread in amounts of 0.5 to about 1.5% by weight of the thread as aqueous solutions, which contain 98 to 65% water, applied.

There are several methods of applying the finish to the yarn. In one method, the yarn is kicked with a roller or a wick that is partially immersed in the aqueous finishing compounds are in touch. The other finish application methods consist of spraying, brushing or immersion of the Yarn in the aqueous finishing baths, as described above, for example, in the case of the spinning and drawing stages became.

Preferred finishes are obtained by mixing 40 to 60% trimethylolethane triple argonate and 20 to 35% polyoxyethylene (8) nonylphenol and 20 to 30% quaternary diethyl sulfate formed from 1-hydroxyethylene-2-heptadecenylimidazoline.

It is a quick process for demonstrating tolerability of polyacrylic acid finishes with spinning

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Finishing compounds have been devised. Such an attempt bypasses the lengthy methodology that was required to coat nylon yarns with finish and acrylic acid sizing compositions to demonstrate compatibility. The experiment is carried out by creating a finishing bath heated to 55 ° C. and then adding 2% by weight of the finishing compound to be examined. In the present experiment, two baths were created, one containing 6.25% by weight of a commercial finish and the other 6.25% solids of a commercial finish, both of which were polyacrylic acid finishes. These two finishes are considered exemplary of the range of commercially available products. After a 5-minute storage period, the sizing / finish systems are tested for compatibility, with any system that exhibits a coarse separation being viewed as incompatible. If they are compatible, they are then poured onto a polytetrafluoroethylene surface and ^{dried in an oven at 70 °} C. and the films formed are evaluated. The finish is considered compatible with the finish provided the films are not tacky and similar in appearance to those films cast from the finish alone,

Nylon yarns and threads, first with the spinning finish masses have been coated according to the invention are therefore with the easily commercially available polyacrylic acid finishes according to the definition given by the above Trial is awarded, tolerable. The test results further show that when nylon is first with the spin finish and then treated with polyacrylic acid finishes so that the finish acts and in the desired manner its behavior has no losses or disadvantages as a result of the difficulties of incompatibility with the spin finish.

The following example serves to illustrate a preferred composition according to the invention, but the example is not a limitation.

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example 1

A preferred spin finish is created by mixing the following components:

component Wt% 1,1,1-Tr imethyloläthan- tr ipelargonat 50% Polyoxyethylene (8) nonyl phenol 25% quaternary diethyl sulfate of 1-hydroxyethyl-2-heptadecenyl- imidazoline 25%

The mixture is then added to water and heated to about 50 ° C to form an aqueous solution containing 85% water, heated. The spin finish does not require homogenization to form a stable emulsion,

The aqueous finish mass is then applied to melt-spun 185 denier / 34-thread nylon 66 ~ yarn at a point between the spinneret and the reel used to take up the threads. The yarn is thus with a 1% finish, based on the weight of the yarn, coated. These threads are then on a known tension winder using two sets of rollers; a drawing needle between the rollers around which the yarn is wrapped and then into a take-up arrangement drawn, in which the yarn is wound on a cylindrical bobbin. The yarn is then made using known techniques wound on a tree and subsequently the yarn sheet is fed from the tree through a drum dryer sizing machine, where the finishing material such as Acrysol A3 (trade mark) is applied in aqueous solutions.

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The nylon coated with finish polyacrylic finish showed No stickiness or watering or clouding of the surface when tested. There was no noticeable separation in the sizing bath when the finished nylon was run through.

The sized yarn is then ready to weave. The yarn has very good lubrication, excellent bundle cohesion and good antistatic properties during the weaving process, '

Example 2

A spin finish is achieved by mixing the following ingredients generated:

Component weight%

Trimethylolethane-tri-Co_ _{1 (} ^ -

Fatty acid ester 40%

Polyoxyethylene (8) nonylphenol 3O%

quaternary diethyl sulfate of

1-hydroxyethyl-2-heptadecenyl-

imidazoline. "]"> %

Nylon fibers can be processed in a manner similar to Example 1 and sized with several polyacrylic acid solutions having molecular weights in the range of 5,000 to 10,000; less than 50,000; less than 150,000; and 180,000 to 220,000 to give coating weights of 0.5 to 2 percent by weight of the yarn. The yarns can be woven by many techniques without undue difficulty.

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Claims (4)

- 9 claims 1. Nylon spin finish compound with applied polyacrylic acid finish is compatible, and consists of a lubricant, antistatic agent and emulsifier, characterized in that that the mass 30 to 50% of the lubricant that consists of soybean oil, coconut oil, Trieste of fatty acids with 8 to 10 Carbon atoms with 1,1,1-trimethylolethane and 1,1,1-trimethylolpropane existing class is selected; 10 to 30% by weight of quaternary diethyl sulfate of i-hydroxyethyl-2-heptadecenyl-imidazoline; Contains 20 to 60% by weight of an emulsifier, which consists of the polyoxyethylene (20) sorbitan monolaureate, Polyoxyethylene (8) nonylphenol and polyoxyethylene (40) sorbitol hexaoleate is selected, 2. Composition according to claim 1, characterized in that it consists essentially of 50 wt .-% trimethylolethane triple argonate; 25% by weight of polyoxyethylene (8) nonylphenol and 25% by weight of quaternary Diethyl sulfate consists of 1 "hydroxyethyl-2-heptadecenyl" imidazoline. 3. Composition according to claim 1, characterized in that it consists essentially of 40% by weight of trimethylolethane triple argonate; 30% by weight of polyoxyethylene (8) nonylphenol and 30% by weight of quaternary diethyl sulfate of 1-hydroxyethyl-2-heptadecenyl-imidazoline, 4. Composition according to one of claims 1 to 3, characterized in that it is an emulsion in 99 to 65% of water Represents the total weight of the connection. 4Q9810 / 1078