US3523416A - Method of making a composite yarn - Google Patents

Description

Aug. 11,1970 R. B. WOLF METHOD oF MAKING A coMPosITE YARN Original Filed Aug. l5. 1968 United States Patent O Int. Cl. D02g 3/02 U.S. Cl. 57--140 4 Claims ABSTRACT OF THE DISCLOSURE A composite yarn formed from twisting together textured filamentary acetate and textured filamentary polyester yarns. The acetate is preferably solution dyed, while the textured polyester filaments are preferably dyed to a color which substantially corresponds to the color of the acetate filaments.

This is a division of application Ser. No. 752,858, filed Aug. l5, 1968, now abandoned.

BACKGROUND OF THE INVENTION This invention relates generally to composite yarn utilized principally in the production of knitted fabrics. In the art, it is well known to form such fabrics from either textured filamentary acetate or textured filamentary polyester. `Fabric formed from said textured lilamentary acetate is beautiful in appearance having excellent luster, drape and hand. The color of such fabrics is clear and bright. However, `acetate fabrics tend to sag and are definitely not machine-washable. Accordingly, such fabrics must be hand washed or drycleaned.

On the other hand, knitted fabrics formed from textured filamentary polyester are machine washable, wrinkle free, and almost indestructible. However, such polyester fabrics are difficult to dye and it is difficult to produce level colors therein. Further, the hand of polyester fabrics is crisp and dry and the drape thereof is not as esthetically pleasing as the drape of fabrics formed from textured flamentary acetate..

SUMMARY OF THE INVENTION Generally speaking, in accordance with the invention, a composite yarn is provided which consists of textured filamentary acetate and textured filamentary polyester. The yarn preferably includes two strands of acetate for each strand of polyester. The acetate is preferably solution dyed and formed into a Ifilamentary yarn which is then textured. A filamentary polyester yarn is also textured and then may be dyed to a color substantially corresponding to the color of said solution dyed filamentary acetate yarn. The resulting textured filamentary acetate and polyester yarns are twisted together to form the composite yarn according to the invention.

Accordingly, it is an object of this invention to provide a composite yarn from which knitted fabrics having substantially the luster, drape, hand and color characteristics f acetate fabrics and the washability, wrinkle resistance and easy care of polyester fabrics.

Another object of the invention is to provide a composite yarn which has improved characteristics but which may be produced on existing equipment.

A further object of the invention is to provide a method for producing a composite yarn having the above-described characteristics.

Still other objects and advantages of the invention will in part be obvious and will in part be apparent from the specification.

3,523,416 Patented Aug. 11, 1970 JCC The invention accordingly comprises the several steps and the relation of one or, more of such steps with respect to each of the others, and the article possessing the features, properties, and the relation of elements, which .are exemplified in the following detailed disclosure, and the scope of the invention will be indicated in the claims.

BRIEF DESCRIPTION OF THE DRAWING For a fuller runderstanding of the invention, reference is had to the following description taken in connection with the accompanying drawing, in which: l'

FIG. f1 is a schematic representation of one strand of textured polyester and two strands of textured acetate;

FIG. 2 is a schematic representation of the filaments of FIG. 1 twisted to form a composite yarn; and

FIG. 3 is a schematic representation of a composite yarn formed from textured iilamentary acetate and textured filamentary polyester.

DESCRIPTION OF PREFERRED EMBODIMENT Referring now to FIG. 1, the basic constituents of the preferred embodiment of the composite yarn according to the invention, namely one filament 10 of textured polyester and two Afilaments 12 of textured acetate, are schematically shown.

In FIG. 2, the filaments or strands of FIG. 1 are shown plied together to form a composite yarn 14. FIG. 3 shows a composite yarn according to the invention comprising a plurality of textured acetate filaments and a plurality of textured polyester filaments as would be the case in actual yarns.

In forming the composite yarn according to the invention, the textured filamentary acetate and the textured filamentary polyester are processed separately. Acetate yarns are preferably solution dyed during the extrusion operation since the dyeing of textured acetate yarn or fabric generally causes a significant loss of texture, bulk and other characteristics. Accordingly, the acetate yarns utilized in the composite yarn according to the invention are preferably formed rby solution dyeing the acetate, extruding a lamentary yarn from said acetate and texturing said acetate filamentary yarn in the conventional manner.

The polyester filamentary yarn utilized in the composite yarn according to the invention is also textured in the conventional manner and then dyed. In the preferred embodiment according to the invention, the textured polyester filamentary yarn is dyed to a color substantially corresponding to the color of the solution dyed textured acetate filamentary yarn so that the composite yarn formed therefrom will have a substantially uniform color. However, the composite yarn according to the invention could be formed from acetate and polyester filalmentary yarns of different colors or shades if s'o desired. Textured polyester flamentary yarn may be dyed by any of the conventional methods including pressure dyeing, paddle machine dyeing, and package dyeing.

The composite yarn according to the invention is formed by twisting the textured filamentary acetate and the textured filamentary polyester together in a conventional manner. In the preferred embodiment of the invention, the composite yarn comprises two strands of textured acetate for each strand of textured polyester.

The textured, continuous acetate and polyester filaments which form the composite yarn of the present invention may be textured by any of several well known conventional methods which impart a crimp or curl to the yarn when relaxed. Among the methods that may be used are the false twist method, the running of the filamentary yarn past a fluid jet to disrupt the filaments, overfeeding the filamentary yarn into a stufiing box, running the synthetic yarn between a heated gear arrangement, and twisting a strand of multilament synthetic yarn, heat setting ksaid yarn and then untwisting on conventional equipment. The texturizing of the acetate and polyester yarns forms no part of the present invention as the textured yarns utilized in the present invention may be processedv in any number of Ways to achieve the desired results.

Example Solution dyed, iilamentary acetate yarn of a Weight of about 200 denier was textured by the false twist method. Filamentary polyester yarn of a Weight of about 150 denier was textured by the false twist method and package dyed to a color substantially corresponding to the color of said textured iilamentary acetate. A composite yarn was formed by twisting said acetate and polyester yarns together to form a composite yarn, said composite yarn having two strands of said acetate for each strand of said polyester. Knitted fabric was produced from said composite yarn by conventional knitting methods. The resulting fabric has substantially the drape, hand and esthetic appeal of fabric formed from textured acetate and the washability, wrinkle resistance and easy care of fabric formed from textured polyester.

It will thus be seen that the objects set forth above, and those made apparent from the preceding description are efficiently obtained and, since certain changes may be made in carrying out the above method and the articles set forth without departing from the spirit and scope of the invention, it is intended that all matter contained in the above description and shown in the accompanying drawings shall be interpreted as illustrative and not in a limiting sense.

It is also to be understood that the following claims are intended to cover all of the generic and specific features of the invention herein described, and all statements of the scope of the invention which, as a matter of language, might be said to fall therebetween.

What is claimed is:

1. A method for forming a composite yarn comprising solution-dyeing acetate; forming a iilamentary yarn from said solution-dyed acetate; texturing said acetate iilamentary yarn; forming a polyester larnentary yarn; texturing said polyester lamentary yarn; collecting said textured polyester flamentary yarn in a package; dyeing said package to a color substantially corresponding to the color of said solution-dyed iilarnentary acetate yarn; and twisting said textured polyester and said textured acetate yarns together to form a composite yarn.

2. A method as recited in claim 1, wherein two parts of said textured acetate lamentary yarn are twisted with one part of said textured polyester lamentary yarn to form said composite yarn.

3. A composite yarn produced in accordance with the method of claim 1.

4. A composite yarn produced in accordance with the method of claim 2.

References Cited UNITED STATES PATENTS 2,971,322 2/1961 Bouvet 57--140 3,022,545 2/1962 Wylde et al. 264-168 XR 3,166,886 1/1965 Kretsch 28-75 XR 3,251,097 3/1966 Faw et al 57-140 XR 3,309,855 3/1967 Stoll et al. 57-157 XR FOREIGN PATENTS 247,434 10/ 1963 Australia.

782,205 4/1968 Canada.

986,297 3/ 1965 Great Britain. 1,059,567 2/ 1967 Great Britain.

STANLEY N. GILREATH, Primary Examiner W. H. SOHROEDER, Assistant Examiner U.S. Cl. X.R.

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