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Sheath-core compound fiber, false twist textured yarn composed thereof, method for manufacturing the same, and woven knit fabric including the fiber

A composite fiber and textile technology, applied in the direction of conjugated synthetic polymer artificial filaments, textiles, fabrics, etc., can solve the problems of poor stability in the silk making process, low yarn strength, damaged fibers and products, etc. , to achieve a good passability effect

Active Publication Date: 2015-05-20
MITSUBISHI CHEM CORP +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] However, in the methods of Patent Documents 1 and 2, in order to sufficiently block the radiant heat from the sun, it is necessary to contain a large amount of inorganic fine particles in the fibers.
As a result, there is a problem that not only the stability of the spinning process deteriorates, but also the texture of the fiber and the product is significantly impaired.
[0006] In addition, although the polyvinyl alcohol-based fiber of Patent Document 3 has the effect of blocking radiant heat, there is a problem that the strength of the yarn is low.

Method used

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
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  • Sheath-core compound fiber, false twist textured yarn composed thereof, method for manufacturing the same, and woven knit fabric including the fiber
  • Sheath-core compound fiber, false twist textured yarn composed thereof, method for manufacturing the same, and woven knit fabric including the fiber
  • Sheath-core compound fiber, false twist textured yarn composed thereof, method for manufacturing the same, and woven knit fabric including the fiber

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0157] Polyethylene resin (PE) (manufactured by Nippon Polyethylene Co., Ltd., MFR 4 g / 10 minutes) was used as a core. By adding 2% by mass of titanium dioxide (anatase type, primary particle average A PET obtained with a particle size of 0.3 μm) was used as the sheath.

[0158] The core-sheath composite ratio (volume ratio) is 1 / 6, using a spinning device equipped with a core-sheath composite spinning nozzle with a hole diameter of 0.4mm and a hole number of 24, at a spinning temperature of 290°C and a spinning speed of 1800m / min. Undrawn filaments were obtained by spinning. The obtained undrawn yarn was drawn at a drawing speed of 600 m / min, a drawing temperature of 85° C., a heat setting temperature of 150° C., and a maximum draw ratio of 0.68 times to obtain a drawn yarn of 84 dtex24 filament. Four obtained drawn yarns were paralleled to have a fineness of about 330 dtex. A ribbed knitted fabric was produced using a flat knitting machine with 16 gauges (thread / 2.54 cm). ...

Embodiment 2～7 and comparative example 3、4

[0160] In Example 1, the core-sheath composite ratio (volume ratio) and the resin of the main component of the core were changed as shown in Table 1. In the same manner as in Example 1, stretched core-sheath composite fibers were produced. Silk and knitted fabrics. Table 1 shows the R value, infrared transmittance (%), visible light transmittance (%), ultraviolet transmittance (%), and air permeability of the obtained knitted fabric.

Embodiment 8

[0167] Using a core-sheath composite spinning nozzle with a hole diameter of 0.3 mm and a number of holes of 36 to produce a drawn yarn of 33dtex / 36 filaments, the drawn yarn of the core-sheath composite fiber of the present invention was obtained in the same manner as in Example 1. Stretch. Using this drawn yarn, a woven fabric of a ripple taffeta structure with a warp of 165 threads / 2.54 cm and a weft of 154 threads / 2.54 cm (cover factor value (cover factor value) 1832) was produced. Table 1 shows the R value, infrared transmittance (%), visible light transmittance (%), ultraviolet transmittance (%), and air permeability of the obtained woven fabric.

[0168] In addition, the cover factor value is a value obtained by the following formula.

[0169] Coverage factor value = (DWp) 1 / 2 ×MWp+(DWf) 1 / 2 ×MWf

[0170] Among them, DWp is the total warp fineness (dtex), MWp is the warp weaving density (root / 2.54cm), DWf is the weft total fineness (dtex), and MWf is the weft weavin...

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Abstract

Provided is a fiber which has an intact texture, blocks solar thermal radiation, can be produced while attaining satisfactory stability in a spinning step, and has the satisfactory property of running through a false twisting step. Also provided is a woven / knitted fabric which comprises the fiber and blocks thermal radiation. The core-sheath composite fiber comprises a core and a sheath and contains titanium dioxide in an amount of 1-3 mass%. The core comprises, as a main component, a resin having a refractive index of A, and the sheath comprises, as a main component, a resin having a refractive index of B, the A and B satisfying relationship (1). The woven / knitted fabric is configured of the core-sheath composite fiber so as to have a basis weight of 40-400 g / m2. |A-B|=0.01 (1)

Description

technical field [0001] The present invention relates to a core-sheath composite fiber capable of blocking radiant heat from the sun and a woven fabric comprising the fiber. [0002] This application claims the priority of Japanese Patent Application No. 2010-131416 for which it applied to Japan on June 8, 2010, The content is used here. Background technique [0003] Conventionally, fibers obtained by mixing white pigments such as titanium oxide, talc, and barium sulfate with inorganic fine particles such as carbon black and aluminum powder are known as fibers used in curtains and clothes for the purpose of light-shielding properties. Dispersed in fibers (Patent Documents 1, 2). In addition, as a cloth for white camouflage on snow, there is known an ultraviolet reflective white cloth formed of a polyvinyl alcohol-based fiber as a sheath yarn and a synthetic fiber multifilament as a core yarn (core yarn) (Patent Document 3 ). [0004] On the other hand, the technique of cor...

Claims

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): D01F8/06D01F8/14D03D15/00D04B1/16
CPCD01F1/04D01F1/106D01F8/06D01F8/14D04B1/16D10B2401/22D03D15/49D01D5/34D03D15/00D02G3/045D03D15/283
Inventor 今北纯哉横山淳一高岛嘉守
Owner MITSUBISHI CHEM CORP