JP7303507B1 - Core yarn, its manufacturing method, fabrics, knits, and textile products - Google Patents

Abstract

A core yarn dyed with a small amount of dye and having excellent flexibility, water absorption, quick drying properties, shape stability, anti-billing properties, and durability is provided. A core yarn with a core-sheath structure includes a core comprising polyester filaments and a sheath comprising top-dyed cotton strands. A method of manufacturing the core yarn includes a twisting step of twisting a twisted yarn comprising a filament constituting the core and a top-dyed cotton twisted yarn constituting the sheath. The axis and the central axis of this filament do not overlap and are parallel. Another method for producing the core yarn is a silo spinning and twisting process in which a filament constituting the core and two or more twisted yarns constituting the sheath, including top-dyed cotton twisted yarn, are twisted by silo spinning. include. [Selection drawing] Fig. 1

Description

The present invention relates to core yarns, methods of making the same, fabrics, knits, and textiles.

As a composite fiber, a core yarn, which is a core-sheath composite fiber in which a core yarn is completely covered with a sheath yarn, is known. In Patent Document 1, there is a core made of polyester fibers with an irregular cross section and a sheath made of short fibers containing cotton fibers, and the core is in an untwisted state and the sheath is in a bound state. A water-absorbing quick-drying spun yarn composed of twisted spun yarn is disclosed.

Utility Model Registration No. 3213540

Conventional core yarns are colorless, and yarn dyeing or piece dyeing techniques are used to dye textiles in which colorless core yarns are used. In recent years, energy saving and reduction of carbon dioxide emissions have also been required in the dyeing of textile products. .

Therefore, the problem to be solved by the present invention is to provide a core yarn that is dyed with a small amount of dye and has excellent flexibility, water absorbency, quick drying properties, shape stability, anti-billing properties, and durability.

The inventors of the present invention conducted extensive studies in view of the above problems, and found that a core yarn containing cotton twisted yarn whose sheath is top-dyed is sufficiently dyed even if the amount of dye used is small. The present invention has been completed based on these findings.

The present invention is a corespun yarn comprising a core-sheath structure, wherein the core comprises polyester filaments, the sheath comprises top-dyed cotton yarns, the sheath further comprises unbleached cotton yarns, The content of top-dyed cotton in the cotton contained in the sheath is in the range of 5 to 70% by mass, and the futon cover, futon, mattress pad, pillow, mattress, carpet, floor cushion, cushion, clothing, or It relates to corespun yarns used in socks.
The polyester filaments preferably include at least one selected from the group consisting of polyester filaments with irregular cross sections, recycled polyester filaments, biodegradable polyester filaments, polybutylene terephthalate filaments, and polyethylene naphthalate filaments.
The cotton preferably contains at least one selected from the group consisting of organic cotton and BCI certified cotton.
The content of the core in the core- spun yarn is preferably 20-60% by weight, and the content of the sheath in the core- spun yarn is preferably 80-40% by weight.
The model number of said corespun yarn preferably ranges from 5s to 60s .

The present invention includes a twisting step of twisting a filament constituting the core and a twisted yarn containing a top-dyed cotton twisted yarn constituting the sheath, and in the twisting step, the central axis of the core spun yarn and The present invention relates to a method for producing core spun yarn used for duvet covers, futons, mattresses, pillows, mattresses, carpets, floor cushions, cushions, clothing, or socks, in which the central axes of the filaments are non-overlapping and parallel.

The present invention includes a silo spinning and twisting step of twisting a twisted yarn comprising a filament constituting the core and two or more top-dyed cotton twisted yarns constituting the sheath by silo spinning. , a method for producing corespun yarns for use in mattresses, pillows, mattresses, carpets, floor cushions, cushions, clothing, or socks.

Furthermore, the present invention provides a fabric using the core spun yarn, a knit using the core spun yarn, a futon cover, a futon, a mattress pad, a pillow, a mattress, a carpet, a floor cushion, The present invention relates to cushions, clothing, or socks, and futon covers, futons, mattresses, pillows, mattresses, carpets, floor cushions, cushions, clothing, or socks in which the knit is used.

The core yarn of the present invention reduces the amount of dye used and the energy consumed for dyeing, and provides a core yarn that is excellent in flexibility, water absorption, quick drying, shape stability, anti-billing properties, and durability. A core yarn manufacturing method of the present invention provides a core yarn manufacturing method for manufacturing the core yarn. The fabric of the present invention provides a fabric in which the core yarn is used. The textile product of the present invention provides a textile product in which the core yarn is used.

1 is a schematic diagram of one embodiment of a core yarn; FIG. 1 shows one embodiment of a method for manufacturing core yarns of the present invention; FIG. Figure 4 shows another embodiment of the method of manufacturing the core yarn of the present invention;

The present invention will be described in more detail.
In addition, unless otherwise specified, the numerical range "-" represents from the above to the following, and includes both numerical values at both ends. Moreover, when a numerical range is indicated, the upper limit and lower limit can be appropriately combined, and the numerical range obtained thereby is also disclosed.
Furthermore, in the description of the drawings, the same elements are denoted by the same reference numerals, and overlapping descriptions are omitted. Also, the dimensional ratios in the drawings are exaggerated for convenience of explanation, and may differ from the actual ratios.

<Polyester filament>
The core of the core yarn having the core-sheath structure of the present invention contains polyester filaments, preferably polyester filaments.

Examples of the polyester constituting the polyester filament include polyesters shown below.
(1) polyethylene terephthalate (PET), polybutylene terephthalate (PBT), polyethylene-2,6-naphthalate (PEN), polymethylene terephthalate (PMT), polypropylene terephthalate (PPT), polyethylene-p-oxybenzoate (PEOB), Poly-1,4-cyclohexylene dimethylene terephthalate (PCT) and copolymer components such as diol components such as diethylene glycol, neopentyl glycol and polyalkylene glycol, adipic acid, sebacic acid, phthalic acid, isophthalic acid, Polyesters (excluding biodegradable polyesters) copolymerized with dicarboxylic acid components such as 2,6-naphthalenedicarboxylic acid, liquid crystal polyesters,
(2) biodegradable polyesters such as polylactic acid, polyhydroxyalkanoate, polybutylene succinate, polybutylene succinate-co-adipate, polybutylene adipate terephthalate, polyethylene terephthalate succinate;
(3) Recycled polyesters of these polyesters.

The polyester filaments preferably include at least one selected from the group consisting of polyester filaments having irregular cross sections, recycled polyester filaments, biodegradable polyester filaments, polybutylene terephthalate filaments, and polyethylene naphthalate filaments, more preferably. consists of at least one selected from the group consisting of these polyethylene filaments.

The polyester filaments preferably contain an antistatic agent such as polyethylene glycol. Furthermore, said polyester filaments are preferably stored in a plastic bag. As a result, charging of the polyester filaments and adsorption of contaminants in the air to the polyester filaments are prevented.

<Top-dyed cotton twisted yarn>
The core yarn sheath with the core-sheath construction of the present invention comprises a top-dyed cotton twist. The cotton is not limited to specific cotton. The cotton preferably contains at least one selected from the group consisting of organic cotton and BCI certified cotton, and more preferably at least one selected from the group consisting of these cottons.

The sheath may further comprise twisted yarns of unbleached cotton. The content of top-dyed cotton in the cotton contained in the sheath is preferably in the range of 5 to 70% by mass, and the content of unbleached cotton in the cotton contained in the sheath is preferably 95%. It is in the range of ~30% by mass. When the content of the top-dyed cotton and the generated cotton is within the above range, the core yarn can be sufficiently dyed even if the amount of dye used for dyeing the core yarn is small.

<Core yarn>
FIG. 1 is a schematic diagram of one embodiment of a core yarn having a core-sheath structure of the present invention. The core yarn has a structure in which a core comprising polyester filaments 1 is covered by a sheath comprising top-dyed cotton twists 2 .

The core of the core yarn with the core-sheath structure of the present invention is undyed and the sheath is dyed. Therefore, only the surface of the core yarn of the present invention is dyed, and the amount of dye used for the dyeing and the energy consumed for dyeing can be reduced.

In the core yarn having a core-sheath structure of the present invention, the content of the core is preferably in the range of 20 to 60% by mass, and the content of the sheath in the core yarn is preferably in the range of 80 to 40% by mass.

The model number of the core yarn with the core-sheath structure of the present invention preferably ranges from 5s to 60s.

<Manufacturing method of core yarn>
The core yarn having the core-sheath structure of the present invention is manufactured by a normal core yarn manufacturing method. Examples of methods for producing the core yarn having the core-sheath structure of the present invention include the following two methods.

One of the methods for producing the core yarn of the present invention (manufacturing method 1) is twisting a twisted yarn (roving) comprising a top-dyed cotton twisted yarn constituting the sheath to the filament constituting the core. wherein the central axis of the core yarn and the central axis of the filament do not overlap and are parallel in the twisting process.

One embodiment of the manufacturing method 1 is shown in FIG. A plurality of twisted yarns, including the polyester filaments 1 that make up the core and the top-dyed cotton yarns 2, can be Z-twisted to produce the core yarn (FIG. 2A). In the Z-twisting, the central axis of the filament 1 constituting the core lies to the left of the central axis of the core yarn, and both central axes are parallel.

The core yarn can also be produced by S-twisting a plurality of yarns 2, including the filaments 1 constituting the core and the top-dyed cotton yarn (Fig. 1B). In the S-twist, the central axis of the filament 1 forming the core is on the right side of the central axis of the core yarn, and both central axes are parallel.

In the twisting step, since the central axis of the core yarn and the central axis of the filament do not overlap, the core is prevented from being shifted in the cross section of the core yarn.

Another one of the methods for producing the core yarn of the present invention (manufacturing method 2) is to add a twisted yarn containing two or more top-dyed cotton twisted yarns constituting the sheath to the filament constituting the core. It includes a silo spinning and twisting process that twists by silo spinning.

One embodiment of the manufacturing method 2 is shown in FIG. In the silo spinning and twisting process, the central axis of the core yarn and the central axis of the filament 1 do not overlap and are parallel. In addition to the one or more top-dyed cotton twisted yarns 2a constituting the sheath, one or more unbleached cotton twisted yarns 2b may be twisted.

<Application of core yarn>
The core yarn of the invention is woven into a fabric or knit. Furthermore, the fabric or knit is used for textile products such as duvet covers, futons, mattress pads, pillows, mattresses, carpets, floor cushions, cushions, clothes, and socks.

EXAMPLES The present invention will be described in more detail below based on examples, but the present invention is not limited to these.

In Examples and Comparative Examples, various physical properties were measured or calculated as follows.
<Water Absorption of Knit Fabric>
A drop of water (approximately 0.04 ml) is dropped from a height of 100 mm onto the knitted fabric attached to the holding frame, and the time from when the water droplet reaches the knitted fabric to when the specular reflection of water completely disappears. was measured.

<Quick drying of knitted fabric>
0.6 ml of water was dropped on a 10 cm×10 cm knitted fabric, and the residual moisture content was calculated by the following formula (1). The time required for the residual moisture content to reach 10% was used as a standard for quick drying.
Residual moisture content = [W _t −W]/(W ₀ −W)]×100 (1)
However, W is the mass of the knitted fabric, _Wt is the mass of the knitted fabric containing water after a predetermined time has passed, and _W0 is the mass of the knitted fabric containing water immediately after the water is dripped.

[Example 1]
A polyethylene terephthalate filament (70 D/72) containing 1% by mass of polyethylene glycol (#600) as an antistatic agent, stored in a plastic bag, was supplied to the core yarn device of the FA506 fine spinning machine and rewound, The polyethylene was Z-twisted via a guidewire wheel with a twist of top-dyed beige semi-combed organic cotton yarn unwound from two spin ingots of the spinner at the nip of the front rollers of the spinner. A core yarn 1 of model number 32s was spun with a core consisting of terephthalate filaments and a sheath consisting of the top-dyed semi-combed organic cotton twist yarn. The content of the core in the core yarn 1 was 42% by mass, and the content of the sheath was 58% by mass. A knitted fabric 1 was manufactured by weaving the core yarn 1 . The knit fabric 1 had a water absorbency of 8 seconds and a quick drying property of 46 minutes.

[Example 2]
A recycled polyester filament (70 D/72) containing 1% by mass of polyethylene glycol (#600) as an antistatic agent stored in a plastic bag was supplied to the core yarn device of the FA506 fine spinning machine and rewound, S-twisted with a top-dyed beige semi-combed organic cotton strand unwound from two spin ingots of the spinner at the nip of the front rollers of the spinner via a guide wire wheel and the reclaimed A core yarn 2 of model number 32s was spun with a core made of polyester filaments and a sheath made of the top-dyed semi-combed organic cotton yarn. The content of the core in the core yarn 2 was 50% by mass, and the content of the sheath was 50% by mass. A knit fabric 2 was produced by weaving the core yarn 1 . The knit fabric 2 had a water absorbency of 10 seconds and a quick drying property of 52 minutes.

[Example 3]
A polybutylene terephthalate filament (130 D/48) containing 1% by mass of polyethylene glycol (#600) as an antistatic agent, stored in a plastic bag, was supplied to the core yarn device of the FA506 fine spinning machine and rewound. is Z-twisted via a guide wire wheel at the nip of the front roller of the spinner with a twist of top-dyed brown semi-combed BCI certified cotton unwound from two spin ingots of the spinner, said A model number 16s core yarn 3 was spun with a core consisting of polybutylene terephthalate filaments and a sheath consisting of a twist of the top-dyed semi-combed BCI certified cotton. The content of the core in the core yarn 3 was 40% by mass, and the content of the sheath was 60% by mass. A knit fabric 3 was manufactured by weaving the core yarn 3 . The knit fabric 3 had a water absorbency of 13 seconds and a quick drying property of 58 minutes.

1 polyester filament, 2 cotton twisted yarn.

Claims (12)

A corespun yarn having a core-sheath structure,
the core comprising polyester filaments and the sheath comprising top-dyed cotton strands;
The sheath further includes unbleached cotton twisted yarn, and the content of top-dyed cotton in the cotton contained in the sheath is in the range of 5 to 70% by mass,
A core-spun yarn characterized by being used for futon covers, futons, mattress pads, pillows, mattresses, carpets, floor cushions, cushions, clothing, or socks. 2. The core- spun yarn of claim 1, wherein the polyester filaments are selected from the group consisting of polyester filaments with irregular cross-sections, recycled polyester filaments, biodegradable polyester filaments, polybutylene terephthalate filaments, and polyethylene naphthalate filaments. A corespun yarn comprising at least one A corespun yarn according to claim 1, wherein said cotton comprises at least one selected from the group consisting of organic cotton and BCI certified cotton. The core- spun yarn according to claim 1, wherein the content of the core in the core- spun yarn is 20-60% by mass, and the content of the sheath in the core -spun yarn is 80-40% by mass. A corespun yarn characterized by: The core- spun yarn according to claim 1, characterized in that the model number of said core - spun yarn ranges from 5s to 60s. A corespun yarn according to claim 1, wherein said polyester filaments contain an antistatic agent. A method for producing the corespun yarn according to any one of claims 1 to 6 ,
A twisting step of twisting a filament constituting the core and a twisted yarn including a top-dyed cotton twisted yarn constituting the sheath,
A method for producing a core - spun yarn , wherein in the twisting step, the central axis of the core-spun yarn and the central axis of the filament do not overlap and are parallel. A method for producing the corespun yarn according to any one of claims 1 to 6 ,
A core spun yarn characterized by comprising a silo spinning and twisting step of twisting a twisted yarn containing a filament constituting the core and two or more top-dyed cotton twisted yarns constituting the sheath by silo spinning . How to manufacture. A fabric in which the core spun yarn according to any one of claims 1 to 6 is used. A knit using the core spun yarn according to any one of claims 1 to 6 . Duvet covers, futons, mattresses, pillows, mattresses, carpets, floor cushions, cushions, clothing, or socks in which the fabric according to claim 9 is used. Duvet covers, futons, mattresses, pillows, mattresses, carpets, floor cushions, cushions, clothing, or socks using the knit according to claim 10 .

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