Single-faced pile fabric and preparation method thereof

Abstract

A single-faced pile fabric is disclosed, including a plain knitted face and a pile face, a yarn of the plain knitted face has a shrinkage of 14-16%, a yarn of the pile face has a shrinkage of 9-10%, and a connection yarn configured for connecting the plain knitted face and pile face has a shrinkage of 29-31%.

Claims

1. A single-faced pile fabric, comprising a plain knitted face and a pile face, wherein a yarn of the plain knitted face has a shrinkage of 14-16%, a yarn of the pile face has a shrinkage of 9-10%, and a connection yarn configured for connecting the plain knitted face with the pile face has a shrinkage of 29-31%; and wherein the single-faced pile fabric is prepared by using a circular knitting machine, and a work drum in the circular knitting machine has a height of 124 mm; a needle slot is formed on a cam of the circular knitting machine, and the needle slot successively comprises a needle feeding section, a needle elevating section, a needle drop section, a shoulder section, a loop-forming section and a needle return section; an arc-shaped corner is provided between the needle elevating section and the needle drop section, and the arc-shaped corner comprises an upper vertex and a lower vertex; the cam has a height of 25.5 mm, a distance between the lower vertex of the arc-shaped corner and a bottom of the cam is 18.85-21.35 mm; a distance between a lower inner wall of the needle return section and the bottom of the cam is 6.35-7.85 mm; and the needle slot has a width of 3.151-3.153 mm.

2. The single-faced pile fabric according to claim 1, wherein the yarn of the plain knitted face has the shrinkage of 15%, the yarn of the pile face has the shrinkage of 9.5%, and the connection yarn configured for connecting the plain knitted face with the pile face has the shrinkage of 30%.

3. The single-faced pile fabric according to claim 1, wherein a density of the plain knitted face is greater than a density of the pile face.

4. The single-faced pile fabric according to claim 1, wherein a polydopamine membrane is wrapped on a surface of a yarn for the pile face, and the yarn for the pile face is made of the following raw materials in parts by weight: 100-120 parts of polyester slices and a 10-12 parts of silane grafted mica powder.

5. The single-faced pile fabric according to claim 4, wherein the polyester slices are modified by macromolecular long-chain silane, and the silane grafted mica powder is obtained by grafting small molecule silane with mica powder.

6. The single-faced pile fabric according to claim 5, wherein the polyester slices are prepared by mixing the polyester slices and hexadecyltrimethoxysilane in a weight ratio of 100:(2-3), continuously stirring and mixing at 60-70? C., and drying to obtain processed polyester slices.

7. The single-faced pile fabric according to claim 6, wherein the macromolecular long-chain silane is one selected from a group consisting of octadecyltrimethoxysilane and hexadecyltrimethoxysilane.

8. The single-faced pile fabric according to claim 5, wherein the silane grafted mica powder is prepared by adding the mica powder into a silane aqueous solution, heating to 60-70? C. to allow reaction, and filtering and drying to obtain the silane grafted mica powder; and the silane aqueous solution is made from 3-aminopropyltriethoxysilane.

9. The single-faced pile fabric according to claim 4, wherein a preparation method of the polydopamine membrane wrapped on the surface of the yarn for the pile face is as follows: immersing the yarn for the pile face in a dopamine hydrochloride solution to allow reaction at 40-60? C. for 2-3 h, taking the yarn for the pile face out, and drying the yarn for the pile face to obtain a yarn wrapped with the polydopamine membrane on the surface of the yarn for the pile face.

Description

BRIEF DESCRIPTION OF THE DRAWINGS

(1) FIG. 1 is a structural diagram of a cam of the present application.

DETAILED DESCRIPTION

(2) The present application will be further described in details at in combination with examples.

(3) All the raw materials are commercially available.

Preparation Example 1

(4) Adding mica powder into 3-aminopropyltriethoxysilane aqueous solution with a mass concentration of 3%, heating to 60? C. for reacting for 30 min, and filtrating and drying to obtain a silane grafted mica powder.

Preparation Example 2

(5) Mixing polyester slices and hexadecyltrimethoxysilane in a weight ratio of 100:2 at 60? C. with 800 r/min for 15 min, and drying at 80? C. to obtain processed polyester slices.

Preparation Example 3

(6) Mixing polyester slices and hexadecyltrimethoxysilane in a weight ratio of 100:3 at 70? C. with 800 r/min for 15 min, and drying at 80? C. to obtain processed polyester slices.

Preparation Example 4

(7) Mixing polyester slices and octadecyltrimethoxysilane in a weight ratio of 100:2 at 60? C. with 800 r/min for 15 min, and drying at 80? C. to obtain processed polyester slices.

Example 1

(8) A single-faced pile fabric included a plain knitted face and a pile face, in which a density of the plain knitted face was greater than that of the pile face, a yarn of the plain knitted face had a shrinkage of 14%, a yarn of the pile face had a shrinkage of 9%, and a connection yarn configured for connecting the plain knitted face and the pile face had a shrinkage of 29%. The above three yarns were weaved to obtain the single-faced pile fabric on a circular knitting machine, in which the fabric had a width of 150 cm and a gram weight of 400 GSM. The yarn used in this example was prepared by spinning and weaving the polyester slices.

(9) In particular, referring to FIG. 1, a needle slot 2 was defined in a cam 1 of a circular knitting machine, and the needle slot 2 successively included a needle feeding section 21, a needle elevating section 22, a needle drop section 23, a shoulder section 24, a loop-forming section 25 and a needle return section 26. An arc-shaped corner 3 was provided between the needle elevating section 22 and the needle drop section 23, and the arc-shaped corner 3 included an upper vertex 31 and a lower vertex 32. The cam 1 had a height of 25.5 mm. A distance between the lower vertex 32 of the arc-shaped corner 3 and a bottom of the cam 1 was 18.85 mm. A distance between a lower inner wall of the needle return section 26 and a bottom of the cam 1 was 6.35 mm. The needle slot 2 had a width of 3.151 mm. A work drum in the circular knitting machine had a height of 124 mm.

Example 2

(10) A single-faced pile fabric included a plain knitted face and a pile face, in which a density of the plain knitted face was greater than that of the pile face, a yarn of the plain knitted face had a shrinkage of 15%, a yarn of the pile face had a shrinkage of 9.5%, and a connection yarn configured for connecting the plain knitted face and pile face had a shrinkage of 30%. The above three yarns were weaved to obtain the single-faced pile fabric on a circular knitting machine, and the fabric had a width of 150 cm and a gram weight of 400 GSM. The yarn used in this example was prepared by spinning and weaving the polyester slices.

(11) In particular, referring to FIG. 1, a needle slot 2 was formed on a cam 1 of the circular knitting machine, and the needle slot 2 successively included a needle feeding section 21, a needle elevating section 22, a needle drop section 23, a shoulder section 24, a loop-forming section 25 and a needle return section 26. An arc-shaped corner 3 was provided between the needle elevating section 22 and the needle drop section 23, and the arc-shaped corner 3 included an upper vertex 31 and a lower vertex 32. The cam 1 had a height of 25.5 mm. A distance between the lower vertex 32 of the arc-shaped corner 3 and a bottom of the cam 1 was 21.35 mm. A distance between a lower inner wall of the needle return section 26 and a bottom of the cam 1 was 6.35 mm. The needle slot 2 had a width of 3.153 mm. A work drum in the circular knitting machine had a height of 124 mm.

Example 3

(12) A single-faced pile fabric included a plain knitted face and a pile face, in which a density of the plain knitted face was greater than that of the pile face, a yarn of the plain knitted face had a shrinkage of 16%, a yarn of the pile face had a shrinkage of 10%, and a connection yarn configured for connecting the plain knitted face and pile face had a shrinkage of 31%. The above three yarns were weaved to obtain the single-faced pile fabric on a circular knitting machine, the fabric had a width of 150 cm and a gram weight of 400 GSM. The yarn used in this example was prepared by spinning and weaving the polyester slices.

(13) In particular, referring to FIG. 1, a needle slot 2 was formed on a cam 1 of the circular knitting machine, and the needle slot 2 successively included a needle feeding section 21, a needle elevating section 22, a needle drop section 23, a shoulder section 24, a loop-forming section 25 and a needle return section 26. An arc-shaped corner 3 was provided between the needle elevating section 22 and the needle drop section 23, and the arc-shaped corner 3 included an upper vertex 31 and a lower vertex 32. The cam 1 had a height of 25.5 mm. A distance between the lower vertex 32 of the arc-shaped corner 3 and a bottom of the cam 1 was 20.35 mm. A distance between a lower inner wall of the needle return section 26 and a bottom of the cam 1 was 7.85 mm. The needle slot 2 had a width of 3.153 mm. A work drum in the circular knitting machine had a height of 124 mm.

Example 4

(14) This example differed from Example 2 in that:

(15) The yarn used for the pile face was prepared by the following method:

(16) S1. accurately weighing 1000 g of the polyester slices and 100 g of the silane grafted mica powder prepared in Preparation Example 1, mixing, granulating by extruding through a screw extruder to obtain particles, feeding the particles into a spinning unit, performing stretch spinning at a spinning temperature at 280? C. and a draft ratio of 3.4, collecting spinning fibers, cooling to room temperature, and spinning to obtain a yarn; and

(17) S2. immersing the yarn in a dopamine hydrochloride solution, reacting at 40? C. for 2 h, taking the yarn out, and drying in the air to obtain the yarn used for the pile face, in which the dopamine hydrochloride solution was prepared by dissolving 0.2 g of dopamine hydrochloride into 100 mL of 0.01 mol/L Tris buffer solution with pH of 8.5.

Example 5

(18) This example differed from Example 2 in that:

(19) The yarn used for the pile face was prepared by the following method:

(20) S1. accurately weighing 1100 g of the polyester slices and 110 g of the silane grafted mica powder prepared in Preparation Example 1, mixing, granulating by extruding through a screw extruder to obtain particles, feeding the particles into a spinning unit, performing stretch spinning at a spinning temperature at 280? C. and a draft ratio of 3.4, collecting spinning fibers, cooling to room temperature, and spinning the spinning fibers to obtain the yarn; and

(21) S2. immersing the yarn in a dopamine hydrochloride solution, reacting at 40? C. for 2 h, taking the yarn out, and drying in the air to obtain the yarn used for the pile face, in which the dopamine hydrochloride solution was prepared by dissolving 0.2 g of dopamine hydrochloride into 100 mL of 0.01 mol/L Tris buffer solution with pH of 8.5.

Example 6

(22) This example differed from Example 2 in that:

(23) The yarn used for the pile face was prepared by the following method:

(24) S1. accurately weighing 1200 g of the polyester slices and 120 g of the silane grafted mica powder prepared in Preparation Example 1, mixing, granulating by extruding through a screw extruder to obtain particles, feeding the particles into a spinning unit, performing stretch spinning at a spinning temperature at 280? C. and a draft ratio of 3.4, collecting spinning fibers, cooling to room temperature, and spinning the spinning fibers to obtain the yarn; and

(25) S2. immersing the yarn in a dopamine hydrochloride solution, reacting at 40? C. for 2 h, taking the yarn out, and drying in the air to obtain the yarn used for the pile face, in which the dopamine hydrochloride solution was prepared by dissolving 0.2 g of dopamine hydrochloride into 100 mL and 0.01 mol/L of Tris buffer solution with pH of 8.5.

Example 7

(26) This example differed from Example 2 in that:

(27) The yarn used for the pile face was prepared by the following method:

(28) S1. accurately weighing 1000 g of the polyester slices and 100 g of the silane grafted mica powder prepared in Preparation Example 1, mixing, granulating by extruding through a screw extruder to obtain particles, feeding the particles into a spinning unit, performing stretch spinning at a spinning temperature at 280? C. and a draft ratio of 3.4, collecting spinning fibers, cooling to room temperature, and spinning the spinning fibers to obtain the yarn; and

(29) S2. immersing the yarn in a dopamine hydrochloride solution, reacting at 60? C. for 3 h, taking the yarn out, and drying in the air to obtain the yarn used for the pile face, in which the dopamine hydrochloride solution was prepared by dissolving 0.2 g of dopamine hydrochloride into 100 mL of 0.01 mol/L Tris buffer solution with pH of 8.5.

Example 8

(30) This example differed from Example 2 in that:

(31) The yarn used for the pile face was prepared by the following method:

(32) S1. accurately weighing 1000 g of the polyester slices prepared in Preparation Example 2 and 100 g of the silane grafted mica powder prepared in Preparation Example 1, mixing, granulating by extruding through a screw extruder to obtain particles, feeding the particles into a spinning unit, performing stretch spinning at a spinning temperature at 280? C. and a draft ratio of 3.4, collecting spinning fibers, cooling to room temperature, and spinning the spinning fibers to obtain the yarn; and

(33) S2. immersing the yarn in a dopamine hydrochloride solution, reacting at 40? C. for 2 h, taking the yarn out, and drying in the air to obtain the yarn used for the pile face, in which the dopamine hydrochloride solution was prepared by dissolving 0.2 g of dopamine hydrochloride into 100 mL of 0.01 mol/L Tris buffer solution with pH of 8.5.

Example 9

(34) This example differed from Example 2 in that:

(35) The yarn used for the pile face was prepared by the following method:

(36) S1. accurately weighing 1000 g of the polyester slices prepared in Preparation Example 3 and 100 g of the silane grafted mica powder prepared in Preparation Example 1, mixing, granulating by extruding through a screw extruder to obtain particles, feeding the particles into a spinning unit, performing stretch spinning at a spinning temperature at 280? C. and a draft ratio of 3.4, collecting spinning fibers, cooling to room temperature, and spinning the spinning fibers to obtain the yarn; and

(37) S2. immersing the yarn in a dopamine hydrochloride solution, reacting at 40? C. for 2 h, taking the yarn out, and drying in the air to obtain the yarn used for the pile face, in which the dopamine hydrochloride solution was prepared by dissolving 0.2 g of dopamine hydrochloride into 100 mL of 0.01 mol/L Tris buffer solution with pH of 8.5.

Example 10

(38) This example differed from Example 2 in that:

(39) The yarn used for the pile face was prepared by the following method:

(40) S1. accurately weighing 1000 g of the polyester slices prepared in Preparation Example 4 and 100 g of the silane grafted mica powder prepared in Preparation Example 1, mixing, granulating by extruding through a screw extruder to obtain particles, feeding the particles into a spinning unit, performing stretch spinning at a spinning temperature at 280? C. and a draft ratio of 3.4, collecting spinning fibers, cooling to room temperature, and spinning the spinning fibers to obtain the yarn; and

(41) S2. immersing the yarn in a dopamine hydrochloride solution, reacting at 40? C. for 2 h, taking the yarn out, and drying in the air to obtain the yarn used for the pile face, in which the dopamine hydrochloride solution was prepared by dissolving 0.2 g of dopamine hydrochloride into 100 mL of 0.01 mol/L Tris buffer solution with pH of 8.5.

Comparative Example 1

(42) A single-faced pile fabric included a plain knitted face and a pile face, in which a density of the plain knitted face was greater than that of the pile face, a yarn of the plain knitted face had a shrinkage of 15%, a yarn of the pile face had a shrinkage of 9.5%, and a connection yarn configured for connecting the plain knitted face and pile face had a shrinkage of 5%. The above three yarns were weaved to obtain the single-faced pile fabric on a circular knitting machine, in which the fabric had a width of 150 cm and a gram weight of 400 GSM. The yarn used in this example was prepared by spinning and weaving the polyester slices.

(43) In particular, referring to FIG. 1, a needle slot 2 was defined in a cam 1 of the circular knitting machine, and the needle slot 2 successively included a needle feeding section 21, a needle elevating section 22, a needle drop section 23, a shoulder section 24, a loop-forming section 25 and a needle return section 26. An arc-shaped corner 3 was provided between the needle elevating section 22 and the needle drop section 23, and the arc-shaped corner 3 included an upper vertex 31 and a lower vertex 32. The cam 1 had a height of 25.5 mm. A distance between the lower vertex 32 of the arc-shaped corner 3 and a bottom of the cam 1 was 21.35 mm. A distance between a lower inner wall of the needle return section 26 and a bottom of the cam 1 was 6.35 mm. The needle slot 2 had a width of 3.153 mm. A work drum in the circular knitting machine had a height of 124 mm.

Comparative Example 2

(44) A single-faced pile fabric included a plain knitted face and a pile face, a density of the plain knitted face was greater than that of the pile face, a yarn of the plain knitted face had a shrinkage of 15%, a yarn of the pile face had a shrinkage of 9.5%, and a connection yarn configured for connecting the plain knitted face and pile face had a shrinkage of 30%. The above three yarns were weaved on a circular knitting machine to obtain the single-faced pile fabric, in which the fabric had a width of 150 cm and a gram weight of 400 GSM. The yarn used in this example was prepared by spinning and weaving the polyester slices.

(45) In particular, referring to FIG. 1, a needle slot 2 was formed on a cam 1 of the circular knitting machine, and the needle slot 2 successively included a needle feeding section 21, a needle elevating section 22, a needle drop section 23, a shoulder section 24, a loop-forming section 25 and a needle return section 26. An arc-shaped corner 3 was provided between the needle elevating section 22 and the needle drop section 23, and the arc-shaped corner 3 included an upper vertex 31 and a lower vertex 32. The cam 1 had a height of 25.5 mm. A distance between the lower vertex 32 of the arc-shaped corner 3 and a bottom of the cam 1 was 16.5 mm. A distance between a lower inner wall of the needle return section 26 and a bottom of the cam 1 was 6.35 mm. The needle slot 2 had a width of 3.153 mm. A work drum in the circular knitting machine had a height of 124 mm.

Comparative Example 3

(46) A single-faced pile fabric included a plain knitted face and a pile face, in which a density of the plain knitted face was greater than that of the pile face, a yarn of the plain knitted face had a shrinkage of 15%, a yarn of the pile face had a shrinkage of 9.5%, and a connection yarn configured for connecting the plain knitted face and pile face had a shrinkage of 30%. The above three yarns were weaved to obtain the single-faced pile fabric on a circular knitting machine, the fabric had a width of 150 cm and a gram weight of 400 GSM. The yarn used in this example was prepared by spinning and weaving the polyester slices.

(47) In particular, referring to FIG. 1, a needle slot 2 was defined in a cam 1 of a circular knitting machine, and the needle slot 2 successively included a needle feeding section 21, a needle elevating section 22, a needle drop section 23, a shoulder section 24, a loop-forming section 25 and a needle return section 26. An arc-shaped corner 3 was provided between the needle elevating section 22 and the needle drop section 23, and the arc-shaped corner 3 included an upper vertex 31 and a lower vertex 32. The cam 1 had a height of 25.5 mm. A distance between the lower vertex 32 of the arc-shaped corner 3 and a bottom of the cam 1 was 21.35 mm. A distance between a lower inner wall of the needle return section 26 and a bottom of the cam 1 was 6.35 mm. The needle slot 2 had a width of 3.153 mm. A work drum in the circular knitting machine had a height of 125 mm.

Comparative Example 4

(48) This comparative example differed from Example 4 in that:

(49) The yarn used for the pile face was prepared by the following method:

(50) S1. accurately weighing 1000 g of the polyester slices and 100 g of the silane grafted mica powder, mixing, granulating by extruding through a screw extruder to obtain particles, feeding the particles into a spinning unit, performing stretch spinning at a spinning temperature at 280? C. and a draft ratio of 3.4, collecting spinning fibers, cooling to room temperature, and spinning the spinning fibers to obtain the yarn; and

(51) S2. immersing the yarn in a dopamine hydrochloride solution, reacting at 40? C. for 2 h, taking the yarn out, and drying in the air to obtain the yarn used for the pile face, in which the dopamine hydrochloride solution was prepared by dissolving 0.2 g of dopamine hydrochloride into 100 mL of 0.01 mol/L Tris buffer solution with pH of 8.5.

Comparative Example 5

(52) This comparative example differed from Example 4 in that:

(53) The yarn used for the pile face was prepared by the following method:

(54) S1. accurately weighing 1000 g of the polyester slices and 100 g of the silane grafted mica powder prepared in Preparation Example 1, mixing, granulating by extruding through a screw extruder to obtain particles, feeding the particles into a spinning unit, performing stretch spinning at a spinning temperature at 280? C. and a draft ratio of 3.4, collecting spinning fibers, cooling to room temperature, and spinning the spinning fibers to obtain the yarn.

Comparative Example 6

(55) This comparative example differed from Example 8 in that:

(56) The silane grafted mica powder was prepared by the following method:

(57) adding mica powder into hexadecyltrimethoxysilane aqueous solution with a mass concentration of 3%, heating to 60? C. to allow reaction for 30 min, and filtrating and drying to obtain a silane grafted mica powder.

Comparative Example 7

(58) This comparative example differed from Example 8 in that:

(59) The polyester slices was prepared by the following method:

(60) mixing the polyester slices and 3-Aminopropyltriethoxysilane in a weight ratio of 100:2 at 70? C. with 800 r/min for 15 min, and drying at 80? C. to obtain processed polyester slices.

Performance Test

(61) (1) The fabrics prepared in Examples 1-3 and Comparative examples 1-3 was heated in a water bath of 95? C. for 30 min, air dried, and spread. The thickness was measured and recorded.

(62) TABLE-US-00001 TABLE 1 Measuring results of thickness of the fabrics Ex- Ex- Ex- Compar- Compar- Compar- ample ample ample ative ative ative Groups 1 2 3 example 1 example 2 example 3 Thickness 5.2 5.5 5.3 3.1 2.9 2.8 (mm)

(63) Referring to FIG. 1, comparing with Comparative example 1, the fabrics of Examples 1-3 have thicker thickness, showing that, connecting the plain knitted face and the pile face by a connection yarn with high shrinkage can tension thread loops in the pile face, thereby increasing a height of the thread loops of the pile face. While comparing with Comparative examples 2-3, the fabric of Example 1 has a greater thickness, showing that, raising a position of the vertex of the arc-shaped corner of the cam and lowering a height of the work drum can increase a height of the thread loop of the pile face, and further increase the thickness of the obtained fabric.

(64) (2) The pile faces of the fabrics were conducted pilling and fuzzing tests in accordance with GB/T4802.2 of TextilesDetermination of fabric propensity to surface fuzzing and to pilling-Part 2: Modified Martindale method. Three samples were taken from each of examples and comparative examples, and after rotated for 2000 revolutions on YG401G fabric grinding machine, the samples were rated through comparing standard sample in the YG982D pilling rating box to obtain the average of three samples. Further, the samples were rotated for 3000 revolutions on YG401G fabric grinding machine, and the samples were rated again through comparing standard sample in the YG982D pilling rating box to obtain the average of three samples.

(65) TABLE-US-00002 TABLE 2 pilling and fuzzing test data of fabrics of each of examples and comparative examples Data after friction of 2000 revolutions Data after friction of 2000 revolutions Category Pilling grade Number of pillings Pilling grade Number of pillings Example 2 3.5 grades 21 2 grades 30 Example 4 4.5 grades 9 4 grades 13 Example 5 4.5 grades 8 4 grades 12 Example 6 4.5 grades 8 4 grades 12 Example 7 4.5 grades 8 4 grades 11 Example 8 5 grades 3 4.5 grades 6 Example 9 5 grades 1 4.5 grades 3 Example 10 5 grades 2 4.5 grades 5 Comparative 4 grades 20 3 grades 23 example 4 Comparative 4 grades 26 2.5 grades 25 example 5 Comparative 4 grades 17 3 grades 21 example 6 Comparative 4 grades 15 3 grades 19 example 7

(66) Referring to table 2, comparing with Comparative example 4, the fabrics of Examples 4-6 have better anti-pilling and anti-fuzzing performance, showing that, the mica powder can be gathered on the surface of the yarn by using the silane grafted mica powder, which can increase smoothness and wear resistance of the yarn, so that the fabric has better anti-pilling and anti-fuzzing performance.

(67) Comparing with Comparative example 5, the fabrics of Examples 1 and 7 have better anti-pilling and anti-fuzzing performance, showing that, the smoothness and wear resistance of the yarn can be increased and pilling phenomenon of the yarn because of friction can be reduced by wrapping a polydopamine membrane on the surface of the yarn and using a smooth and dense structure of the polydopamine membrane. After frication of 5000 revolutions, the fabrics of Examples 1 and 7 still have better anti-pilling and anti-fuzzing performance, showing that, the polydopamine membrane wrapped on the surface of the yarn can be removed because of friction after excessive friction, and the mica powder on the surface of the yarn develop a main anti-pilling and anti-fuzzing effect at the same time, so that the fabric has better anti-pilling and anti-fuzzing performance.

(68) Combining with Examples 1, 8-10, the polyester slices is previously processed by macromolecular long-chain silane, and active groups provided by the macromolecular long-chain silane can interact with the polydopamine membrane, so that the polydopamine membrane can be firmly attached on the surface of the yarn, persistence of the anti-pilling performance of the yarn can be increased, dispersion uniformity of small molecule silane in the system can be promoted at the same time, further the mica powder can be dispersed on the surface of the yarn more uniformly, thereby further improving anti-pilling performance of the yarn.

(69) Combining with Examples 8 and Comparative example 6, the yarn of the Example 8 has better anti-pilling effect, it can be shown that after analysis, after the polyester slices and the mica powder are processed by the macromolecular long-chain silane, silane long-chain of the polyester slices may wind with silane long-chain of the mica powder in the whole system, which will influence movement of the mica powder in the system, hinder the mica powder from gathering on the surface of the yarn, so that the anti-pilling performance of the yarn of Example 6 is weaker than that of the Example 8.

(70) Combining with Examples 8 and Comparative example 7, the yarn of the Comparative example 7 has poor anti-pilling effect, it can be shown that after analysis, after the polyester slices and the mica powder are processed by the small molecule silane, during forming the yarn, the mica powders are gathered on the surface of the yarn due to migration effect of the small molecule silane, and the small molecule silane of the polyester slices cannot extend to the surface of the yarn due to its short chain, so that the polydopamine membrane can only interact with the small molecule silane of the mica powder. Therefore, comparing with the polydopamine membrane of the yarn in Example 8 interacting with the macromolecular long-chain silane and the small molecule silane at the same time, there is a small firmness of the polydopamine membrane on the yarn in Comparative example 7, so that the yarn in Comparative example 7 has a worse anti-pilling effect than that of Example 8.

(71) The specific examples are only configured for illustrating the present application, not intended to limit the present application. This example can be made any non-creative changes according to requirements by those skilled in the technical field after reading this specification, and they are protected by patent law as long as they fall within the scope of the claims in the present application.

LISTS OF REFERENCE SIGNS

(72) 1. Cam 2. Needle slot 21. Needle feeding section 22. Needle elevating section 23. Needle drop section 24. Shoulder section 25. Loop-forming section 26. Needle return section 3. Arc-shaped corner 31. Upper vertex 32. Lower vertex