Method for manufacturing circular knitting fusible interlining having outer edge forming process by thermal fixing, and the fusible interlining manufactured by the method

Abstract

Provided are a method for manufacturing circular knitting fusible interlining having an outer edge forming process by thermal fixing and the fusible interlining manufactured by the method. The method for manufacturing circular knitting fusible interlining having an outer edge forming process by thermal fixing, includes: (a) flatly unfolding a circular knitting unprocessed fabric cut after being knitted with a solution dyed yarn; (b) applying hot air to both edges of the circular knitting unprocessed fabric that are cut and rolled and performing thermal fixing thereon; (c) putting the circular knitting unprocessed fabric having the thermally-fixed edges into a heating cylinder and producing a processed fabric having bulkiness due to thermal contraction; and (d) applying an adhesive to the processed fabric to produce fusible interlining.

Claims

1. A method for manufacturing circular knitting fusible interlining having an outer edge forming process by thermal fixing, the method comprising: (a) flatly unfolding a circular knitting unprocessed fabric cut after being knitted with a solution dyed yarn; (b) applying hot air to both edges of the circular knitting unprocessed fabric that are cut and rolled and performing thermal fixing thereon; (c) putting the circular knitting unprocessed fabric having the thermally-fixed edges into a heating cylinder and producing a processed fabric having bulkiness due to thermal contraction; and (d) applying an adhesive to the processed fabric to produce fusible interlining, wherein, in (b), the hot air is supplied to be inclined toward outsides of the edges of the circular knitting unprocessed fabric.

Description

DESCRIPTION OF THE DRAWINGS

(1) FIG. 1 is a photo showing a part of a left edge of a circular knitting unprocessed fabric using a general yarn;

(2) FIG. 2 is a photo showing a part of a left edge of a processed fabric having an outer edge manufactured by the related art;

(3) FIG. 3 is a photo showing a part of a left edge of a circular knitting unprocessed fabric using a solution dyed yarn;

(4) FIG. 4A is a perspective view of the device for forming gumming according to the present invention, and FIG. 4B is a side view of the device for forming gumming according to the present invention;

(5) FIG. 5 is a photo showing a part of a left edge of a processed fabric having a formed outer edge manufactured according to the present invention; and

(6) FIG. 6 illustrates a configuration of fusible interlining according to the present invention.

MODE OF THE INVENTION

(7) Hereinafter, exemplary embodiments of the present invention will be described in detail with reference to the attached drawings.

(8) First, in order to manufacture circuit knit fusible interlining having an outer edge forming process by thermal fixing according to the present invention, a circular knitting unprocessed fabric (see FIG. 3) cut after being knitted in a circular knitting manner using a solution dyed yarn is used.

(9) The solution dyed yarn is a color yarn made by coloring an undiluted solution used to make a raw yarn made of polyester, nylon solely or a mixed material, for example. The solution dyed yarn includes several colors including black. When a final desired color of the fusible interlining is an undyed color (general off white), a non-solution dyed yarn (a general yarn) that is not the solution dyed yarn may be used. Thus, the solution dyed yarn in the following descriptions refers to a yarn that has a final desired color of the fusible interlining and thus is not required to be dyed any more as well as an existing solution dyed yarn.

(10) When the circular knitting unprocessed fabric knitted with the solution dyed yarn is used, a dyeing process, a cleaning process, a dehydration process, and a flexibility process according to the related art can be removed so that a manufacturing process can be simplified.

(11) A method for manufacturing circular knitting fusible interlining according to the present invention includes a process of forming gumming using a device for forming an outer edge illustrated in FIG. 4A and FIG. 4B.

(12) First, in order to easily unfold a circular knitting unprocessed fabric 11 knitted with the solution dyed yarn, the circular knitting unprocessed fabric 11 is prepared in a rolled state so that a cut surface of the circular knitting unprocessed fabric 11 is in an upward direction.

(13) The circular knitting unprocessed fabric 11 is put into a device 1 for forming an outer edge while no much tension is applied to the device 1 for forming the outer edge as possible so that the folded and rolled circular knitting unprocessed fabric 11 can be well unfolded.

(14) The circular knitting unprocessed fabric 11 put into the device 1 for forming the outer edge is kept in a maximally-unfolded state to be suitable for two hot air suppliers 3 disposed at both sides of the circular knitting unprocessed fabric 11, and an outer edge is formed at both edges 11_a that are cut and rolled, in a thermal fixing manner due to hot air of high-temperature heat supplied from the hot air suppliers 3.

(15) Here, thermal fixing refers to improving dimension stability by removing local warping that occurs during a forming process through thermal treatment. That is, thermal fixing is called in a sense of fixing a shape during the forming process.

(16) In this case, preferably, hot air supplied by the hot air suppliers 3 is 180 C. to 250 C.

(17) Also, hot air is supplied by the hot air suppliers 3 to be inclined toward outsides of the edges 11_a of the circular knitting unprocessed fabric, and the circular knitting unprocessed fabric is thermally fixed in a state in which the rolled edges 11_a of the circular knitting unprocessed fabric are unfolded.

(18) Next, an unprocessed fabric having an outer edge formed by thermal fixing in a well-unfolded state is put into a heating cylinder 5. The heating cylinder 5 includes an electrical heating pipe installed inside thereof and heats the electrical heating pipe and thus is maintained at 100 C. to 300 C.

(19) The unprocessed fabric is manufactured as a processed fabric 12 (see FIG. 5) having bulkiness due to thermal contraction by using the heating cylinder 5.

(20) In more detail, when a draw textured yarn (DTY) having the purpose of attaining elasticity is used as the raw yarn, crimp occurs when the raw yarn is drawn and is twisted in one direction on a predetermined tensile condition, is slightly thermally fixed and is twisted again in an opposite direction. This crimp is a basic unit for having elasticity. The twisting performance of the DTY during processing of the raw yarn is restored by the crimp, and the DTY has bulkiness when meeting a proper temperature.

(21) Furthermore, in the process of forming gumming, oil having the purpose of lubrication used to manufacture the raw yarn or to make the unprocessed fabric or other impurities added during a process are removed by hot air and the heating cylinder so that a function corresponding to a pre-processing process according to the related art can also be performed.

(22) Subsequently, when a hot melt adhesive 14 in a powder, liquid or molten state is applied onto the processed fabric 12 using an appropriate coating method, fusible interlining 10 is produced. FIG. 6 illustrates the hot melt adhesive 14 having a shape of dots distributed according to a predetermined rule. However, the scope of the invention is not necessarily limited thereto.