AU2012203558B2 - Colored yarn object, process for producing the same, and fishing line - Google Patents

Abstract

Disclosed is a yarn object coloured with a colorant, comprising a core yarn with a predetermined colorant, and s an outer-layer yarn comprising a semi-transparent filament disposed on the periphery of the core yarn in such a manner that the core yarn is prevented from contacting with other objects, the colour applied to the core yarn is externally visible through the outer-layer yarn. 3445604_1 (GHMatters) P78147AU.I 19/06/12 Fig. 1 CY) C\j Fig. 2 CCYi

Description

AUSTRALIA Patents Act 1990 COMPLETE SPECIFICATION Standard Patent Applicant(s): Yoz-Ami Corporation Invention Title: COLORED YARN OBJECT, PROCESS FOR PRODUCING THE SAME, AND FISHING LINE The following statement is a full description of this invention, including the best method for performing it known to me/us: IP Australia JUN 2012 RECEIVED

IPL

- 1 DESCRIPTION COLORED YARN OBJECT, PROCESS FOR PRODUCING THE SAME, 5 AND FISHING LINE The present application is a divisional of Australian Application No. 2006335800, the contents of which are incorporated herein by cross-reference. 10 TECHNICAL FIELD The present invention relates to a coloured yarn object, and a fishing line. 15 BACKGROUND ART A fishing line including a yarn object made of ultra high-molecular-weight polyethylene, which currently has 20 begun to be widely used in the field of fishing lines, has high strength and low elongation rate, and therefore has advantages of allowing accurate adjustment of the depth to fish and easy perception of a fish strike even when used as a long fishing line. 25 Each predetermined length of a fishing line of this kind is coloured in a different colour for accurate adjustment of the depth to fish. However, since the above mentioned ultra-high-molecular-weight polyethylene has 30 inferior colourability, weak adhesiveness to a binder or the like, and low heat resistance as compared with polyamide or the like, fixing a colorant onto the yarn object is not easy. Therefore, using the coloured fishing line including a yarn object made of ultra-high-molecular 35 weight polyethylene causes problems, such as the colour of the fishing line fades at an early stage, a colorant stains hands and clothes of an angler, and colour 3445604_1 (GHMatters) P78147.AU.I 19/06/12 - 2 migration occurs within the fishing line while the line is repeatedly reeled and unreeled. The prior art discloses forming a covering layer s comprising a particular coloured composition containing a vinylidene chloride resin and a pigment on the surface of a yarn object made of ultra-high-molecular-weight polyethylene (for example, refer to Japanese Unexamined Patent Publication No. 7-229031). 10 The above-mentioned coloured composition is not necessarily sufficient in adhesiveness to a filament, and the problem is that colour fading and colour migration occur at an early stage in actual use. In addition, as the 15 coloured composition is formed on the surface of a yarn object that frequently contacts with other objects, the composition needs to be thickly formed for improved durability (durability of colouring). This causes another problem of decreasing the per-thickness relative strength 20 of the whole yarn object because the resin in the coloured composition has lower mechanical strength than the filament composing the yarn object. Further, as the covering layer in which the resin is used covers the whole surface of the yarn object as a film, compatibility 25 between durability and flexibility of the yarn object cannot be easily achieved. In addition, the covering layer cannot be produced at a low cost because the resin used need to have particular properties in strength, water absorption property, and the like. 30 The above references to the background art do not constitute an admission that the art forms a part of the common general knowledge of a person of ordinary skill in the art. The above references are also not intended to 35 limit the application of the method and system as disclosed herein. 3445604_1 (GHMatters) P78147.AU 1 19/06/12 -3 SUMMARY OF THE PRESENT INVENTION The present invention is directed to a coloured yarn object. The yarn object may beneficially have reduced 5 colour fading caused by contact with other objects or the like. Other benefits of at least some embodiments of the present yarn object are low production costs and high strength. The disclosure is further directed to a process for producing the same, and a fishing line making use of 10 the coloured yarn object. In a first aspect, a yarn object coloured with a colorant is disclosed, comprising a core yarn with a predetermined colorant, and an outer-layer yarn comprising 15 a semi-transparent filament disposed on the periphery of the core yarn in such a manner that the core yarn is prevented from contacting with other objects, the colour applied to the core yarn is externally visible through the outer-layer yarn. 20 In some forms, the outer-layer is obtained by combining a plurality of filaments made of ultra-high molecular-weight polyethylene. 25 In some forms, the core yarn is obtained by combining a plurality of filaments made of ultra-high-molecular weight polyethylene. In some forms, the outer-layer yarn is made semi 30 transparent by containing a surface-treatment agent, and thereby the colour applied to the core yarn is externally visible through the outer-layer yarn. In some forms, the yarn object is subjected to a heat 35 treatment, and to a drawing treatment. In some forms, the yarn object is subjected to the 3445604_1 (GHMatters) P78147.AU. 19/06/12 - 4 heat treatment prior to the drawing treatment. In some forms, the yarn object is subjected to the drawing treatment prior to the heat treatment. 5 In some forms, the yarn object is simultaneously subjected to the heat treatment and the drawing treatment. In a second aspect, a fishing line comprising a 1o coloured yarn object is disclosed according to either the first aspect or the second aspect. In some forms, each predetermined length of the core yarn of the coloured yarn object is coloured in a is different colour. In the above mentioned first aspect, at least some embodiments of the present invention relate to: (1) a fishing line comprising a core yarn coloured with a 20 predetermined colorant and an outer-layer yarn disposed on the periphery of the core yarn in such a manner that the core yarn is prevented from contacting with other objects, the outer-layer yarn being constituted in such a manner that colour applied to the core yarn is externally 25 visible, wherein the core yarn is obtained by combining a plurality of filaments made of ultra-high-molecular-weight polyethylene; (2) the coloured yarn object according to the above mentioned (1), wherein the outer-layer yarn comprises a 30 transparent or semi-transparent filament, and the applied colour is externally visible through the outer-layer yarn 3; (3) the coloured yarn object according to the above mentioned (1) or (2) , wherein the outer-layer yarn is 35 made transparent or semi-transparent by containing a surface treatment agent, and thereby the colour is externally visible through the outer-layer yarn 3; and 3445604_1 (GHMatters) P78147 AU. I 19/06/12 - 5 (4) the coloured yarn object according to any one of the above-mentioned (1) to (3) , wherein the outer-layer yarn is disposed in a braid or spiral form on the periphery of the core yarn, a space is formed between these outer-layer 5 yarns, and the applied colour is externally visible through the space. Further, in the above mentioned first aspect, at least some embodiments of the present invention relate to: 10 (5) a process for producing a yarn object coloured with a colorant, comprising colouring a core yarn with a predetermined colorant, and then disposing an outer-layer yarn on the periphery of the core yarn in such a manner that the core yarn is prevented from contacting with other 15 objects and that colour applied to the core yarn is externally visible through at least either of the outer layer yarn or a space between the outer-layer yarns 3; (6) the process for producing a coloured yarn object according to the abovementioned (5), wherein the colorant 20 for colouring the core yarn contains an adhesive component for bonding the core yarn and the outer-layer yarn; (7) the process for producing a coloured yarn object according to the above-mentioned (5) or (6), wherein the outer-layer yarn is disposed by being wound around the 25 core yarn in a spiral form; (8) the process for producing a coloured yarn object according to the above-mentioned (5) to (7), wherein the outer-layer yarn is disposed by being woven around the core yarn in a braid form; 30 (9) the process for producing a coloured yarn object according to any one of the above-mentioned (5) to (8), wherein the outer-layer yarn comprises a transparent or semi-transparent filament, and the applied colour is externally visible through the outer-layer yarn 3; 35 (10) the process for producing a coloured yarn object according to any one of the above-mentioned (5) to (9), wherein the outer-layer yarn is made transparent or semi 3445604_1 (GHMatters) P78147.AU.1 19/06/12 -6 transparent by containing a surface-treatment agent, and thereby the colour is externally visible through the outer-layer yarn; (11) the process for producing a coloured yarn object s according to any one of the above-mentioned (5) to (10), wherein the outer-layer yarn is disposed on the periphery of the core yarn, and then subjected to a heat treatment to improve the adhesiveness of the outer-layer yarn 3 to the core yarn; 10 (12) the process for producing a coloured yarn object according to any one of the above-mentioned (5) to (11), wherein the outer-layer yarn is disposed on the periphery of the core yarn, and then subjected to a drawing treatment to improve the adhesiveness of the outer-layer 15 yarn to the core yarn; and (13) the process for producing a coloured yarn object according to any one of the above-mentioned (5) to (12) wherein a space is formed between the outer-layer yarns, and the applied colour is externally visible through the 20 space 4. Still further, in the above mentioned second aspect, at least some embodiment of the present invention relates to: 25 (14) a fishing line comprising the coloured yarn object according to any one of the above-mentioned (1) to (4); and (15) the fishing line according to the above-mentioned (14), wherein each predetermined length of the core yarn of the coloured yarn object is coloured in a different 30 colour. In one form, the surface of the core yarn coloured with a colorant is protected by the outer-layer yarn disposed on the periphery of the core yarn, so that the 35 yarn object is prevented from contacting with another yarn object or other objects. Colour applied to the core yarn is externally well visible through the outer-layer yarn 3445604_1 (GIHManers) P78147.AU. I 19/06/12 - 7 and a space therebetween. In addition, since a filament having as high mechanical strength as the core yarn may be used in the outer-layer yarn, mechanical strength such as tenacity of the whole coloured yarn object can be well 5 maintained. In one form, the outer-layer yarn may be disposed so as to entirely cover the surface of the core yarn, or when disposed in a braid or spiral form on the periphery of the 10 core yarn for example, a space may be formed between the outer-layer yarns as long as the core yarn does not contact with other objects. In one form, the constitution allowing colour applied is to the core yarn to be externally visible through the outer-layer yarn may be, for example, a constitution where a transparent or semi-transparent filament is used in the outer-layer yarn, and the applied colour is externally visible through the outer-layer yarn. Further, in a 20 constitution where the outer-layer yarn is disposed in a braid or spiral form to form a space between the outer layer yarns, the colour is externally visible through the space, and using the transparent or semi-transparent filament and the space between the outer-layer yarns in 25 combination makes the colour externally more visible. In one form, the outer-layer yarn comprises multiple filaments, the filaments may diffuse reflection decreasing the transparency of the whole outer-layer yarn even though 30 each filament is transparent or semi-transparent. In this case, however, transparency of the whole outer-layer yarn can be improved by applying liquid such as water to the yarn object. Accordingly, applying such a yarn object to a fishing line provides excellent external visibility of the 35 colour of the core yarn because when the fishing line is in use and guided into water, the whole outer-layer yarn gets wet and favourably transparent. 3445604_1 (GHMaruers) P78147.AU. 1 19/06/12 - 8 In an embodiment the colour is externally well visible through the outer-layer yarn when the outer-layer yarn contains a transparent or semi-transparent surface s treatment agent to make the whole outer-layer yarn transparent or semi-transparent, or to improve the transparency of the whole outer-layer yarn. As the surface-treatment agent, materials having no negative influence on the filament and colorant may be used. 10 Specifically, examples thereof include an impregnating agent such as silicone oil and a coating material such as a silicone resin and fluororesin, and may be any agent as long as the inclusion thereof makes the whole outer-layer yarn transparent or semi-transparent or improves the 15 transparency of the whole outer-layer yarn. To improve the transparency, it is more preferable that the refractive index of the surface-treatment agent is similar to that of the resin forming the outer-layer yarn. 20 In one form, the outer-layer yarn adheres firmly to the core yarn so as to make colour applied to the core yarn externally well visible. Specific examples of a means of improving the adhesiveness of the outer-layer yarn to the core yarn include a method wherein the outer-layer 25 yarn is disposed on the periphery of the core yarn, and then subjected to a heat treatment or a drawing treatment, and yet are not limited thereto. In addition to improving the adhesiveness,' colour applied to the core yarn can be made externally well visible by impregnating an interface 30 between the outer-layer yarn and the core yarn with a transparent or semi-transparent surface-treatment agent. Alternatively, a space can be made between the above mentioned outer-layer yarns containing a transparent or semi-transparent surface-treatment agent. 35 In an embodiment, ideally suited for a fishing line, a yarn object obtained by combining a plurality of 3445604_1 (G HMatters) P78147.AU 1 19/06/12 -9 filaments made of ultra-high-molecular-weight polyethylene is used because of its high strength and low elongation rate. The core yarn may be an untwisted yarn or a twisted yarn obtained by combining a plurality of filaments, or a s braided yarn. The use of a plurality of filaments combined into one includes the use as a braided yarn. The above-mentioned outer-layer yarn is not limited to specific materials, and general-purpose synthetic 10 fibres such as polyamide, polyester and acryl, and a high function fibre such as ultra-high-molecular-weight polyethylene may be used as the transparent or semi transparent outer-layer yarn. In one form, most synthetic fibres are transparent or semi-transparent. Especially, is using a high-function fibre made of ultra-high-molecular weight polyethylene or the like for both the core yarn and the outer-layer yarn is preferable because thereby the per-thickness (dtex) strength of the whole yarn object can be highly maintained. 20 In one form, the colorant for colouring the above mentioned core yarn that can be used are general purpose dyestuffs and pigments, as well as colorant with improved discoloration and adhesion properties, which may be either 25 water-soluble or water-insoluble. Further, in this embodiment these colorants preferably contain a resin composition or the like for improvement of adhesion between the core yarn and the 30 outer-layer yarn. In many cases, various kinds of adhesive resin compositions appropriate for materials of the outer layer yarn, such as a polyolefin resin, a polyamide resin, a polyester resin, a polyurethane resin and an acrylic resin, are used between the core yarn and the outer-layer 35 yarn. Therefore, the above-mentioned colorants preferably contain these adhesive resin compositions in order that the surface-treatment agent and the colorant can be 3445604_1 (GHMatters) P78147 AU. 1 19/06/12 - 10 simultaneously applied to the surface of the core yarn, which enables low-cost production owing to reduced number of times of applications, and restrains the increase of the yarn object weight by decreasing the application 5 amount. ADVANTAGES At least some embodiments of the present invention 1o have the following advantages: (1) Colour applied to the core yarn is externally well visible through the above-mentioned outer-layer yarn and a space between the outer-layer yarns, so that the visibility of the yarn object can be excellently fully 15 provided. In addition, the surface of the above-mentioned coloured core yarn is protected by the outer-layer yarn disposed on the periphery of the core yarn. Therefore, the yarn object is prevented from contacting another yarn object or other objects, so that the yarn object, even 20 including filaments made of ultra-high-molecular-weight polyethylene and the like having inferior colourability, can be favourably prevented from fading. Fading is caused by contact with other objects, from staining hands and clothes of an angler with the colorant, and from causing 25 colour migration within the fishing line while the line is repeatedly reeled and unreeled. (2) The core yarn can be coloured with a general purpose colorant by an ordinary method, and the outer layer yarn can be disposed on the periphery of the core 30 yarn by an ordinary method. Therefore, the production can be easily performed at low cost as compared with the above-mentioned prior art wherein a particular coloured composition is used. (3) A filament having high mechanical strength such 35 as an ultra-high-molecular-weight polyethylene fibre as well as a general-purpose synthetic fibre can be used for the outer-layer yarn, so that the per-thickness strength 3445604 1 (GHMatters) P78147.AU.I 19/06112 - 11 of the whole coloured yarn object can be highly maintained. BRIEF DESCRIPTION OF THE DRAWINGS 5 Fig. 1 is an enlarged schematic configuration diagram of the principal part of a yarn object, showing a first embodiment of the present invention. 10 Fig. 2 is an enlarged schematic configuration diagram of the principal part of a yarn object, showing a second embodiment of the present invention. DESCRIPTION OF REFERENCE NUMERALS 15 1 Coloured yarn object 2 Core yarn 3 Outer-layer yarn 4 Space 20 DETAILED DESCRIPTION OF THE DRAWINGS Embodiments of the present invention will be hereinafter described on the basis of the drawings by way 25 of example only. Fig. 1 is an enlarged schematic configuration diagram of the principal part of a yarn object, showing a first embodiment of the present invention. 30 As shown in Fig. 1, a yarn object 1 comprises a core yarn 2 and an outer-layer yarn 3 disposed on the periphery of the core yarn. The core yarn 2 comprises a twisted or untwisted yarn of 200 dtex obtained by combining a 35 plurality of filaments made of ultra-high-molecular-weight polyethylene, for example Each predetermined length of this core yarn 2 is coloured in a different colour. 3445604_ I (GHMatters) P78147.AU 1 19106/12 - 12 Four outer-layer yarns 3 are woven around the core yarn 2 in a braided form, and a space 4 is formed between the outer-layer yarns 3. Each outer-layer yarn 3 is 5 transparent and comprises a twisted or untwisted yarn of 50 dtex obtained by combining filaments made of ultra high-molecular-weight polyethylene. The outer-layer yarns 3 adhere well to the above-mentioned core yarn 2. However, diffuse reflection or the like from these filaments may 10 decrease the transparency of the whole outer-layer yarn 3. To prevent this, the outer-layer yarn 3 contains a surface-treatment agent such as silicone oil, and thereby the transparency of the whole outer-layer yarns 3 is favourably maintained. 15 Colour applied to the above-mentioned core yarn 2 is externally well visible through the outer-layer yarns 3 or the space 4 between the outer-layer yarns 3. The surface of the core yarn 2 exposed through this space 4 is 20 sufficiently protected by the outer-layer yarns 3 around the core yarn, and is prevented from contacting with other objects or other sites of the yarn object 1. The width or size of the space 4 is not particularly limited as long as the core yarn 2 is prevented from contacting with other 25 objects or other sites of the yarn object 1. In particular, the width or size is preferably not more than approximately 1 mm, although, it varies with the thickness of the yarn object 1. Alternatively, the width of the space 4 is preferably narrow enough to avoid contact 30 between the core yarn 2 and the surface of another yarn object having a diameter of approximately 1 mm, including when the yarn object 1 of the present invention and the other yarn object are placed along or across each other and are lightly pushed against each other. 35 With regard to the colorant used for the colouring of the core yarn 2, a part thereof may preferably penetrate 3445604_1 (GHMatters) P78147.AU 19/06/12 - 13 into the filaments composing the outer-layer yarns 3 because the colour of this colorant is externally more visible. However, the colorant is adjusted so as not to penetrate to the surface of the outer-layer yarns 3. 5 Further, the colorant used for the colouring of the core yarn 2 contains a surface-treatment agent including an adhesive component such as a polyolefin resin composition, and thereby the core yarn 2 and outer-layer 10 yarns 3 are favourably integrated to prevent the outer layer yarns 3 from shifting on the surface of the core yarn 2. Next, a process for producing the above-mentioned 15 coloured yarn object will be described. First, each predetermined length of the core yarn 2 is coloured in a different colour by dipping or other ordinary methods with the use of a colorant including 20 generally used dyestuffs and pigments appropriate for the colour to be applied. This colorant contains a synthetic resin adhesive component of the same kind as the outer layer yarns 3, such as a polyolefin resin composition. 25 Subsequently, the colorant applied to the above mentioned core yarn 2 is dried, and then four transparent outer-layer yarns 3 are woven around the core yarn 2 in a braided form. A space 4 is formed between the outer-layer yarns 3 by an ordinary method with the use of a braiding 30 machine, and formed into a coloured yarn object 1 shown in Fig. 1. At this time, the space 4 is formed between the outer-layer yarns 3. A portion of the core yarn 2 may be exposed through this space 4. This space 4 is formed to have a size with which the exposed part of the core yarn 2 35 is sufficiently protected by the outer-layer yarns 3 on the periphery of the core yarn, and is prevented from contacting with other objects. 3445604_1 (GHMatters) P78147.AU. I 19/06/12 - 14 Next, with regard to the above-mentioned coloured yarn object 1, a surface-treatment agent such as silicone oil is impregnated into the outer-layer yarns 3 by dipping 5 or other ordinary methods, and then the outer-layer yarns 3 are subjected to a drawing treatment in an atmosphere heated to a temperature of approximately 80 to 1600C, and the outer-layer yarns 3 are allowed to favourably adhere to the core yarn 2 by the heat treatment and drawing 10 treatment. In this embodiment, the surface-treatment agent is impregnated into the outer-layer yarns previous to the heat treatment and drawing treatment. However, the surface-treatment agent may be impregnated into the outer layer yarns after the heat treatment and drawing is treatment. In the case of performing both heat treatment and drawing treatment either of them may be previously performed. Or both of them may be simultaneously performed. 20 Fig. 2 is an enlarged schematic configuration diagram of the principal part of a yarn object, showing a second embodiment of the present invention. In this second embodiment, the outer-layer yarn 3 is 25 wound around the core yarn 2 in a spiral form to form the yarn object 1 into a so-called covering yarn. At this time, the outer-layer yarn 3 is wound forming the space 4 on the surface of the core yarn 2. The rest of the constitution and the function are the same as in the first 30 embodiment. Therefore, the descriptions are omitted. A coloured yarn object described in each of the above embodiments is illustrated for embodying a technical idea of the present invention, and the thickness and materials 35 of a core yarn and an outer-layer yarn, components of a colorant, and the like, are not limited to these embodiments, and various modifications may occur without 3445604_ 1 (GHMatters) P78147.AU 1 19/06/12 - 15 departing from the scope of the claims of the present invention. Although the space 4 is formed between the outer 5 layer yarns 3 in each of the above embodiments, for example, the transparent outer-layer yarns 3 of the present invention may be woven or wound up so closely as not to create the space 4. Further, although the outer layer yarns 3 are disposed on the periphery of the core 10 yarn 2 in a monolayer state in each of the above-mentioned embodiments, the outer-layer yarns 3 of the present embodiment may be disposed on the periphery of the core yarn 2 in a multilayer state. i5 Further, although a twisted yarn and an untwisted yarn are used for the core yarn in the above-mentioned embodiments, a braided yarn may be used in the embodiment. In addition, other general-purpose synthetic fibres such as polyamide, polyester and acryl, natural fibres, metal 20 fibres, or the like, may be used for the above-mentioned core yarn and outer-layer yarn. The core yarn and the outer-layer yarn may be made of different materials from each other. In the above-mentioned embodiments, an adhesive component is contained in a colorant. However, 25 this may be omitted in the present embodiment. In the above-mentioned embodiments, a surface treatment agent such as silicone oil is impregnated into the outer-layer yarn. However, in the present embodiment, 30 the surface-treatment agent may be other components including a silicone resin, and a means for making the outer-layer yarn contain the surface-treatment agent may be a different method from immersion. Further, when the outer-layer yarn is sufficiently transparent, the surface 35 treatment agent may be omitted. In addition, the outer-layer yarn also may be 3445604_1 (GHMatters) P78147.AU. I 19/06/12 - 16 coloured as long as no significant impairment of the object of the invention, such as increased opacity and easy colour fading or migration of the outer-layer yarn, is caused. In the case where the outer-layer yarn is 5 coloured, the core yarn and the outer-layer yarn may be different colours, and a combination thereof can exhibit a particular colour. When each predetermined length of the core yarn and/or the outer-layer yarn is coloured in a different colour, variation of colour visually observed io can be widened. A dappled colour pattern can also be seen when the colour seen through the space 4 and the colour seen through the outer-layer yarn 3 differ from each other. Needless to say, "colour applied to the core yarn 2 is externally visible" in the present embodiment and also 15 includes the case where colour applied to the core yarn 2 is changed by passing through the outer-layer yarn, and the changed colour is externally visible. In addition, in the above embodiments, each 20 predetermined length of a yarn object is coloured in a different colour, and thereby utilised appropriately for a fishing line. A yarn object may be coloured in a single colour over the total length thereof, and can be used for applications other than a fishing line. 25 In the claims which follow and in the preceding description, except where the context requires otherwise due to express language or necessary implication, the word "comprise" or variations such as "comprises" or 30 "comprising" is used in an inclusive sense, i.e. to specify the presence of the stated features but not to preclude the presence or addition of further features in various embodiments of the method and apparatus. 35 3445604_1 (GHMattcrs)P78147.AU1 19106/12

Claims (10)

1. A yarn object coloured with a colorant, comprising 5 a core yarn with a predetermined colorant, and an outer layer yarn comprising a semi-transparent filament disposed on the periphery of the core yarn in such a manner that the core yarn is prevented from contacting with other objects, the colour applied to the core yarn is externally 10 visible through the outer-layer yarn.

2. The coloured yarn object according to claim 1, wherein the outer-layer is obtained by combining a plurality of filaments made of ultra-high-molecular-weight 15 polyethylene.

3. The coloured yarn object according to claim 1 or 2, wherein the core yarn is obtained by combining a plurality of filaments made of ultra-high-molecular-weight 20 polyethylene.

4. The coloured yarn object according to any one of claims 1 to 3, wherein the outer-layer yarn is made semi transparent by containing a surface-treatment agent, and 25 thereby the colour applied to the core yarn is externally visible through the outer-layer yarn.

5. The coloured yarn object according to any preceding claim, wherein the yarn object is subjected to a 30 heat treatment, and to a drawing treatment.

6. The coloured yarn object according to claim 5, wherein the yarn object is subjected to the heat treatment prior to the drawing treatment. 35

7. The coloured yarn object according to claim 5, wherein the yarn object is subjected to the drawing 3445604_ I (GHMatters) P78147.AU.A 19/06/12 - 18 treatment prior to the heat treatment.

8. The coloured yarn object according to claim 5, wherein the yarn object is simultaneously subjected to the 5 heat treatment and the drawing treatment.

9. A fishing line comprising a coloured yarn object according to any one of claims 1 to 8.

10 10. The fishing line according to claim 9, wherein each predetermined length of the core yarn of the coloured yarn object is coloured in a different colour. 3445604_1 (GHMatters) P78147.AU. 1 19/06/12