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Polyamide fiber sewing thread and method for producing same

A technology of polyamide fiber and production method, applied in the field of sewing thread, can solve the problems of discomfort, skin irritation, low strength, etc., and achieve the effects of improving comfort, soft hand feeling, and high strength and elongation

Inactive Publication Date: 2013-01-16
TORAY FIBER RES INST(CHINA) CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Existing sewing threads such as: polyester cotton, pure cotton, etc. have a common problem that the strength of good hairiness is too low, and the wear resistance is poor; the hand feeling of high strength is poor
[0008] Clothing that directly contacts the skin, the sewing thread on the shoulder or neck will also directly contact the skin when wearing it, infants with immature skin or people with sensitive skin, when wearing sewing thread that is harder than the fabric of the clothes or sewing thread Clothes that are too thick can easily irritate the skin and cause itching, which is quite uncomfortable

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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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0050] Set the terminal amino group content to 4.2×10 -5 mol / g polyamide 6 (poly(εcaprolactam)) chips (BASF400N) were fed with 0.3 wt% succinic anhydride to the N6 chips by using a micropowder feeding device before feeding into the inlet of the screw extruder of the spinning machine Additives, the two are melted, mixed and reacted in the screw extruder, sprayed out through the spinning box at 255°C through the spinneret, cooled, and wound to obtain a fineness of 140dtex, a number of single filaments of 24, and a number of entanglements. 7 pieces / m of modified polyamide pre-oriented filaments.

[0051] The obtained modified polyamide pre-oriented yarn is false-twisted under the condition that the processing temperature is 180°C and the twist is 2880 twist / m, and then twisted under the condition that the twist is 100 twist / m to obtain the sewing fabric of the present invention. Wire. The resulting sewing thread had a fineness of 124 dtex, a monofilament fineness of 5.16 dtex, ...

Embodiment 2

[0054] According to the same method as in Example 1, the modified polyamide pre-oriented yarn whose denier is 52dtex, the number of single filaments is 28, and the number of entanglements is 40 / m is obtained, and the obtained modified polyamide pre-oriented yarn is processed at a processing temperature of 160 ℃, under the condition that the twist is 2880 twist / m, perform false twist processing, and then carry out combined twisting on 5 false twist processed yarns according to the condition that the twist is 300 twist / m, and obtain the sewing thread of the present invention. The resulting sewing thread had a fineness of 255.5 dtex, a monofilament fineness of 1.825 dtex, a boiling water shrinkage rate of 1.95%, a wet heat shrinkage recovery rate of 40.4%, a dry heat shrinkage recovery rate of 47%, an average tensile strength of 8.9N, and an average tensile strength of 8.9N. The elongation is 30.7%; the terminal amino group of the modified polyamide fiber fiber-forming polymer pol...

Embodiment 3

[0056] According to the same method as in Example 1, the modified polyamide pre-oriented yarn whose denier is 244dtex, the number of single filaments is 68, and the number of entanglements is 0 / m is obtained, and the obtained modified polyamide pre-oriented yarn is processed at a processing temperature of False-twisting at 180°C with a twist of 3300 twists / m, followed by twisting at a twist of 120 twists / m to obtain the sewing thread of the present invention. The resulting sewing thread had a fineness of 242.0 dtex, a monofilament fineness of 3.56 dtex, a boiling water shrinkage rate of 1.3%, a wet heat shrinkage recovery rate of 32.9%, a dry heat shrinkage recovery rate of 33.3%, and an average tensile strength of 10.2N. The elongation was 34.8%. The terminal amino group content of the modified polyamide fiber fiber-forming polymer polyamide in the sewing thread is 1.76×10 -5 mol / g; fastness to washing is grade 4-5 for discoloration, grade 4 for pollution; fastness to rubbin...

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Abstract

The invention discloses a polyamide fiber sewing thread and a method for producing the same. The sewing thread consists of modified polyamide fiber false twist yarn with the filament size of 1.8 to 6.5 dtex, the number of twists is 50 to 350 twists / m, the shrinkage in boiling water is 0.5 to 2.0 percent, the damp heat crimpness recovery is 30 to 50 percent, and the dry heat crimpness recovery is 30 to 50 percent; and the content of terminal amino groups of fiber forming polymer polyamide of the modified polyamide fiber is 1.0*10<-5> to 3.0*10<-5>mol / g. The sewing thread has high elasticity and bulkiness and is soft, highly anti-yellowing and suitable for making fabrics with high comfort degree and high quality requirements, such as underwear, knitwear, sports jerseys, underclothes and T-shirts.

Description

technical field [0001] The invention relates to a sewing thread, in particular to a yellowing-resistant polyamide fiber sewing thread. Background technique [0002] Sewing thread is the main thread material, which is used to sew various clothing materials, and has dual functions of utility and decoration. The common problems of existing sewing threads such as polyester cotton and pure cotton are that the strength with good hairiness is too low, and the wear resistance is poor; the hand feeling with high strength is poor. Pure polyester fiber sewing thread has high strength, and it will not reduce its strength when it is wet. The shrinkage rate is very small. After proper shaping, the shrinkage is less than 1%, so the stitches can always be flat and beautiful without shrinkage. , In many occasions, it has replaced cotton sewing thread. However, in terms of wearing, the pure polyester thread is too bright, feels too hard and uncomfortable, and has poor air permeability. [...

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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IPC IPC(8): D02G3/46D02G3/26D02G3/28D01F6/90
Inventor 张晴梁海燕佐藤雅伸
Owner TORAY FIBER RES INST(CHINA) CO LTD