WO2018007847A1

WO2018007847A1 - A spinneret plate for extruding fibers

Info

Publication number: WO2018007847A1
Application number: PCT/IB2016/054002
Authority: WO
Inventors: Sreekumar Thaliyil Veedu; Nilesh Shankar REVAGADE; Vikas Kadu Bhangale; Abhijit Vasantrao KASHETWAR; Rohit Verma; Arun Arora; Chandramouli Gangaram GAJELLI
Original assignee: Reliance Industries Limited
Priority date: 2016-07-02
Filing date: 2016-07-04
Publication date: 2018-01-11
Also published as: TW201802311A

Abstract

The present disclosure relates to a spinneret plate for extruding fibers. The spinneret plate comprises a plurality of apertures configured thereon. Each of the plurality of apertures has a plurality of elongated arcuate slots grouped around a central point of each of the plurality of apertures to form a capillary. The plurality of elongated arcuate slots extends in the outward direction from the central point of connection of the plurality of elongated arcuate slots, to subtend a pre-determined angle therebetween and enable the extrusion of the fibers of a non-uniform cross-section therefrom. The polymeric fibers extruded from the plurality of apertures have a better wicking tendency as compared to that extruded from a plurality of apertures having a circular cross-section, thereby absorbing a desired color efficiently during the dying process to obtain fibers of the desired color.

Description

A SPINNERET PLATE FOR EXTRUDING FIBERS

FIELD

The present disclosure relates to the field of mechanical engineering. DEFINITIONS As used in the present disclosure, the following term is generally intended to have the meaning as set forth below, except to the extent that the context in which they are used indicate otherwise.

Wicking tendency - refers to an ability of a fiber or a fabric to absorb moisture by capillary action. BACKGROUND

Polymeric fibers are obtained by using a melt spinning process. In the melt spinning process, a polymeric material is melted to obtain a polymer melt. The polymeric melt is passed through a spinneret plate having a plurality of apertures of a circular cross-section configured thereon, to extrude molten fibers therefrom. The extruded molten fibers are further cooled to obtain polymeric fibers of a circular cross-section. These polymeric fibers are intertwined to produce a fabric having a circular cross-section. However, there are certain drawbacks associated with the circular cross-section polymeric fibers, such as:

• poor wicking tendency;

• poor elasticity;

· loosely intertwining of polymeric fibers to produce a fabric of poor quality;

• less surface area, and the like.

There is, therefore, felt a need for an alternative spinneret plate to extrude fibers, and obviate the above mentioned drawbacks.

OBJECTS Some of the objects of the present disclosure, which at least one embodiment herein satisfies, are as follows. It is an object of the present disclosure to ameliorate one or more problems of the prior art or to at least provide a useful alternative.

An object of the present disclosure is to provide a spinneret plate for extrusion of fibers.

Other objects and advantages of the present disclosure will be more apparent from the following description, which is not intended to limit the scope of the present disclosure.

SUMMARY

The present disclosure envisages a spinneret plate for extruding fibers. A plurality of apertures are configured on the spinneret plate. Each of the plurality of apertures has a plurality of elongated arcuate slots grouped around a central point of each of the plurality of apertures to form a capillary. The plurality of elongated arcuate slots extends in the outward direction from the central point of connection of the plurality of elongated arcuate slots, to subtend a pre-determined angle therebetween and enable the extrusion of the fibers of a nonuniform cross-section therefrom.

The plurality of elongated arcuate slots can be equidistantly grouped around the central point. The plurality of elongated arcuate slots radially extends in the outward direction from the central point.

The pre-determined angle can be in the range of 40° to 60°.

The diameter of each of the plurality of apertures can be in the range of 1 mm to 3 mm.

The spinneret plate comprises an operative upper face and an operative lower face. The capillary extends between the operative upper face and the operative lower face to form a passageway for fibers.

The inner diameter of the capillary can be in the range of 50 mm to 60 mm, and the outer diameter of the capillary can be in the range of 70 mm to 80 mm.

BRIEF DESCRIPTION OF ACCOMPANYING DRAWING A spinneret plate for extruding fibers will now be described with the help of the accompanying drawing, in which: Figures 1 illustrate a schematic view of an aperture in accordance with the present disclosure; and

Figures 2 illustrate a cross-sectional view of fibers in accordance with the present disclosure. Table illustrates a list of the following reference numerals:

DETAILED DESCRIPTION

Conventionally, a plurality of apertures having a circular cross-section are configured on a spinneret plate. Due to the circular cross-section of the apertures, polymeric fibers extruded therefrom are circular in cross-section. These polymeric fibers are intertwined to produce a fabric having a circular cross-section.

However, following are the limitations associated with the circular cross-section polymeric fibers:

• wicking tendency is poor;

• elasticity is poor;

· quality of a fabric produced by intertwining of the polymeric fibers is poor;

• surface area of the polymeric fibers is less, and the like. The present disclosure, therefore, provides a spinneret plate, which is described herein below with reference to Figure 1, for extruding fibers, so as to obviate the above mentioned drawbacks.

The spinneret plate (not shown in Figure 1) comprises a plurality of apertures (10) configured on the spinneret plate. Each of the plurality of apertures (10) has a plurality of elongated arcuate slots (12) grouped around a central point (14) of each of said plurality of apertures (10) to form a capillary (not shown in Figure 1). The plurality of elongated arcuate slots (12) extends in the outward direction from the central point (14) of connection of the plurality of elongated arcuate slots (12), to subtend a pre-determined angle (16) therebetween and enable the extrusion of the fibers (F) of a non-uniform cross-section therefrom (as shown in Figure 2).

In accordance with one embodiment of the present disclosure, during the extrusion of fibers, grooves are formed on the fibers (F).

The plurality of elongated arcuate slots (12) can be equidistantly grouped around the central point (14).

The plurality of elongated arcuate slots (12) radially extends in the outward direction from the central point (14).

The pre-determined angle (16) can be in the range of 40° to 60°.

The diameter of each of the plurality of apertures (10) can be in the range of 1 mm to 3 mm. The spinneret plate comprises an operative upper face (not shown in Figure 1) and an operative lower face (not shown in Figure 1).

The capillary particularly extends between the operative upper face and the operative lower face to form a passageway for fibers.

As compared to the polymeric fibers extruded from the apertures having a circular cross- section, the fibers (F) (as shown in Figure 2) extruded from the plurality of apertures (10) have a better wicking tendency, thereby absorbing a desired color efficiently during the dying process to obtain fibers of the desired color.

The fibers (F) also possess better elasticity, and greater surface area.

Moreover, the grooves formed on the fibers (F) facilitate tight intertwining of the fibers (F), thereby producing a better quality fabric as compared to that produced conventionally.

TECHNICAL ADVANCES AND ECONOMICAL SIGNIFICANCE

The present disclosure described herein above has several technical advantages including, but not limited to, the realization of a spinneret plate that:

- extrudes polymeric fibers of a non-uniform cross-section, thereby producing a fabric of better quality.

The disclosure has been described with reference to the accompanying embodiments which do not limit the scope and ambit of the disclosure. The description provided is purely by way of example and illustration.

The embodiments herein and the various features and advantageous details thereof are explained with reference to the non-limiting embodiments in the following description. Descriptions of well-known components and processing techniques are omitted so as to not unnecessarily obscure the embodiments herein.

The foregoing description of the specific embodiments so fully revealed the general nature of the embodiments herein that others can, by applying current knowledge, readily modify and/or adapt for various applications such specific embodiments without departing from the generic concept, and, therefore, such adaptations and modifications should and are intended to be comprehended within the meaning and range of equivalents of the disclosed embodiments. It is to be understood that the phraseology or terminology employed herein is for the purpose of description and not of limitation. Therefore, while the embodiments herein have been described in terms of preferred embodiments, those skilled in the art will recognize that the embodiments herein can be practiced with modification within the spirit and scope of the embodiments as described herein.

Claims

CLAIMS:

1. A spinneret plate for extruding fibers, said spinneret plate comprising a plurality of apertures configured thereon, wherein each of said plurality of apertures has a plurality of elongated arcuate slots grouped around a central point to form a capillary, said plurality of elongated arcuate slots extending in the outward direction from said central point of connection of said plurality of elongated arcuate slots, to subtend a pre-determined angle therebetween and enable the extrusion of the fibers of a nonuniform cross-section therefrom.

2. The spinneret plate as claimed in claim 1, wherein said plurality of elongated arcuate slots are equidistantly grouped around said central point.

3. The spinneret plate as claimed in claim 1, wherein said plurality of elongated arcuate slots are radially extending in the outward direction from said central point.

4. The spinneret plate as claimed in claim 1 , wherein said pre-determined angle is in the range of 40° to 60°.

5. The spinneret plate as claimed in claim 1 , wherein the diameter of each of said plurality of apertures is in the range of 1 mm to 3 mm.

6. The spinneret plate as claimed in claim 1, wherein said spinneret plate comprises an operative upper face and an operative lower face.

7. The spinneret plate as claimed in claim 1 or claim 6, wherein said capillary extends between said operative upper face and said operative lower face to form a passageway for fibers.

8. The spinneret plate as claimed in claim 1, wherein the inner diameter of said capillary is in the range of 50 mm to 60 mm, and the outer diameter of said capillary is in the range of 70 mm to 80 mm.