Polyester sweater-like large-stitch-length fleece knitted fabric and preparation method thereof

Abstract

The invention provides a polyester sweater-like coarse-pitch fleece knitted fabric and a preparation method thereof, and relates to the technical field of textile, the polyester sweater-like coarse-pitch fleece knitted fabric comprises surface yarns and ground yarns, the surface yarns are coarse-denier polyester filament yarns much thicker than conventional weft knitting polyester, the ground yarns are superfine-denier polyester or irregular-section polyester, and the surface yarns and the ground yarns are interwoven. Through matching of special raw material design and a production preparation process, a product which is rough in appearance texture, extremely high in design sense and uniqueness, fluffy and soft in skin touch sense and warm-keeping and comparable with a sweater in appearance, touch sense and functionality is prepared, the cost is reduced, and the fabric is worthy of popularization and application. And the inherent problems that sweater products cannot be washed by a machine and are easy to pilling are solved.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of textiles, and particularly relates to a polyester wool-like sweater coarse-gauge plush knitted fabric and a preparation method thereof. BACKGROUND

[0002] The knitted sweater fabric on the market has a rough and coarse appearance, is extremely design-oriented and unique, has a soft and warm touch and a functional warmth, is a kind of clothing fabric that is popular for a long time and is widely used. The raw material is mostly animal hair such as wool, pure spinning or mixed acrylic, cotton, rayon and other short fiber raw materials, and polyester fiber, that is, polyester, is rarely used. Polyester is the largest class of synthetic fibers, and its output is the highest among all chemical fibers. Polyester has a series of excellent properties, such as heat resistance, light resistance, resistance to organic solvents, soap, detergents, bleaching agents and the like, and good corrosion resistance, stability to weak acid and alkali, and is much cheaper than the above-mentioned short fibers. It has a wide range of applications, such as sports wear, coats, yoga wear, running wear, and even home underwear. Moreover, there are environmentally friendly polyester: recycled polyester and degradable polyester, which can realize waste recycling and are friendly to the environment. The present application applies polyester fiber, which is cheap and good, to sweater fabric, and through special raw material design and production process, the appearance, touch, functionality and sweater are comparable, the cost is reduced, the inherent non-machine washability and pilling problem of sweater products are improved, and the water absorption and quick drying properties are also improved. SUMMARY

[0003] The first object of the present application is to solve the problems in the prior art and provide a coarse-gauge plush knitted fabric which is not easy to pill.

[0004] In order to achieve the above-mentioned object, the present application adopts the following technical scheme: the present application comprises face yarn and ground yarn, the face yarn is coarse denier polyester filament which is much thicker than conventional weft-knitted polyester, and the ground yarn is ultra-fine denier polyester or polyester with an irregular cross-section. The face yarn and the ground yarn are interwoven into a reverse-pile loop organization, and the face yarn is always on the front and back of the fabric, the ground yarn is always in the middle of the fabric and is covered by the face yarn, and the relative positions of the two are kept unchanged. See the attached Figure 1 .

[0005] The denier of the coarse denier polyester filament is in the range of 600D-900D, the single filament fineness of the polyester ply yarn is in the range of 3.0D-1.5D, the polyester ply yarn is composed of double or multiple pure polyester filaments, and is used to make solid color fabric; or the polyester colored yarn and the cationic modified polyester and the pure polyester filament are combined to make fabric with multi-color gray effect after dyeing treatment, which is more flexible and innovative than sweater products on the market which need to be customized; semi-gloss or matte can also be used on the gloss to reduce the chemical fiber feeling of polyester fiber, which is similar to the matte effect of short fiber sweater surface.

[0006] Superfine denier polyester refers to polyester fiber with single fiber fineness less than 1D, and special-shaped cross-section polyester refers to polyester with special-shaped cross-section made by using different shaped spinnerets, such as cross-shaped, Y-shaped, H-shaped and the like.

[0007] Another object of the present application is to provide a dyeing and finishing process of the above fabric, specifically comprising the following steps:

[0008] S1, pretreatment process flow: first add pretreatment auxiliaries at room temperature, heat up to 80 DEG C at a rate of 2 DEG C / min, keep warm for 25 min, then cool down to 70 DEG C at a rate of 1 DEG C / min and drain;

[0009] S2, dyeing process flow: add polyester dyeing auxiliaries at 35 DEG C, heat up to 50 DEG C at a rate of 5 DEG C / min, add polyester dyes, heat up to 80 DEG C at a rate of 2 DEG C / min, then heat up to 130 DEG C at a rate of 1 DEG C / min, keep warm for 45 min, then cool down to 100 DEG C at a rate of 0.7 DEG C / min, then cool down to 70 DEG C at a rate of 1 DEG C / min and drain;

[0010] S3, post-treatment process flow: after polyester dyeing, clean with sheet alkali, safety powder, moisture absorption and quick drying auxiliaries, cleaning agent Sc, and finally add citric acid;

[0011] S4, post-finishing process: after dyeing, dry, then add moisture absorption and quick drying finishing agent and raising agent, then double-sidedly raise, comb, cut and shake;

[0012] S5, final setting, setting temperature is 130 DEG C, speed is 25-30 m / min, add antistatic agent and softening agent.

[0013] Compared with the prior art, the present application has the following advantages:

[0014] 1. The invention adopts single towel machine to weave into reverse package terry structure, commonly known as towel cloth, the single towel machine gauge range is thick needle 8G-12G, intersection conventional weft knitting machine gauge 24G-32G, needle spacing is much thicker. Adopt thick denier polyester filament face yarn and super fine denier polyester or special cross section polyester ground yarn, combined with double face pulling comb, shear grain's plush technology, make the imitation sweater thick needle spacing knitted fabric, gram weight 280gsm-350gsm between, appearance texture is rough and wild, imitate sweater appearance, soft and fluffy, warm, machine wash, not easy to ball and water absorption fast dry. 2, because the material price is low, and needle spacing is thick, the cost of fabric is much lower than traditional sweater. 3, the raw material of traditional sweater is short fiber blended yarn, mainly wool, acrylic, cellulose short fiber blended yarn, these raw materials are easy to ball, and the water washing size stability is poor, machine washing will cause balling problem and fabric shrinkage deformation. 4, dyeing and finishing process improves the hand feeling of imitation sweater, so that the fabric properties are similar to traditional sweater. BRIEF DESCRIPTION OF DRAWINGS

[0015] Figure 1 The weaving structure diagram of the invention is shown in the figure.

[0016] Figure 2 The pretreatment process flow chart is shown in the figure.

[0017] Figure 3 The dyeing process flow chart is shown in the figure.

[0018] Figure 4 The actual fabric of the invention is shown in the figure (the picture is processed). DETAILED DESCRIPTION

[0019] The following is a specific embodiment of the invention and further describes the technical solution of the invention in combination with the drawings, but the invention is not limited to these embodiments.

[0020] Example one

[0021] 1. Yarn raw material: 900D polyester, bottle piece recycling polyester, single filament fineness 2.0D, super fine denier polyester or special cross section polyester 150D can be used, 96F cross section polyester or 144F super fine denier polyester can be used, this case selects 150D / 96F cross section as a case for discussion, and others are the same.

[0022] 2. Weaving process: this case selects the commonly used 30 inch 8G towel machine in the factory as an example, which is woven into reverse package terry structure, the weaving diagram is shown in the figure. Figure 1 900D thick denier polyester is face yarn, 150D / 96F cross section polyester is ground yarn, face yarn is always on the front and back of the fabric. 900D thick denier polyester thread length is 71.5cm / 50 needles, 150D / 96F cross section polyester thread length is 39.5cm / 50 needles.

[0023] 3. Dyeing process: the dyeing process comprises pretreatment, polyester dyeing and post-treatment.

[0024] Pretreatment auxiliary formulation:

[0025] Refining agent for synthetic fiber WX-2401 g / L

[0026] Polyester dyeing auxiliary formulation:

[0027] Moisture absorption and quick-drying auxiliary for polyester 2 g / L

[0028] Color light stabilizer AD 2 g / L

[0029] Acid chelating dispersant HS 1.5 g / L

[0030] Dispersing and leveling agent RM-7025 0.5 g / L

[0031] Glacial acetic acid 1.7 g / L

[0032] Sodium acetate 0.15 g / L

[0033] Post-treatment auxiliary formulation:

[0034] Flake caustic soda 2.0 g / L

[0035] Scouring agent Sc 2.0 g / L

[0036] Sodium hydrosulfite 6.0 g / L

[0037] Moisture absorption and quick-drying auxiliary for polyester 4.0 g / L

[0038] Citric acid 0.5 g / L

[0039] Process flow:

[0040] (1) Pretreatment process flow: first add the above-mentioned pretreatment auxiliary formulation at room temperature, raise the temperature to 80℃ at a rate of 2℃ / min, keep the temperature for 25 min, then lower the temperature to 70℃ at a rate of 1℃ / min and drain, the pretreatment process curve is shown in the attached Figure 2

[0041] (2) Dyeing process flow: add the above-mentioned polyester dyeing auxiliary at 35℃, raise the temperature to 50℃ at a rate of 5℃ / min, add polyester dye, raise the temperature to 80℃ at a rate of 2℃ / min, then raise the temperature to 130℃ at a rate of 1℃ / min, keep the temperature for 45 min, then lower the temperature to 100℃ at a rate of 0.7℃ / min, then lower the temperature to 70℃ at a rate of 1℃ / min and drain, the dyeing process curve is shown in the attached Figure 3

[0042] ​​(3) Post-processing process: after polyester dyeing, clean with flake caustic soda, sodium hydrosulfite, and detergent Sc, and finally add citric acid.

[0043] The dyeing machine is a Shasho overflow dyeing machine, the main pump speed is 60, the lifting wheel speed is 120, the nozzle position is 90, the speed is 60S / turn, and the gap is 4.

[0044] 5. Post-finishing process: after dyeing, dry, then add moisture absorption and quick drying finishing agent and raising agent, then double-sided raise, comb, cut, and shake. In particular, the cutting process after raising needs to highlight the knitted texture on the front side, with short and neat hair on the back side, and remove long and short hair and floating hair.

[0045] 6. Final setting, setting temperature 130℃, speed 25-30 m / min, add anti-static agent and softener.

[0046] The finished fabric produced by the above process is a single solid color, with an effective width of 150cm+5cm, a square meter weight of 320g±15g, a thickness of 5.38mm, a heat retention rate of 69.7%, and a 3-level anti-pilling performance. Water absorption test, drop method, all absorbed within 1 second; quick drying test, under standard conditions, about 0.3ml of water is dropped, and after 60 minutes, the residual water is less than 20%, that is, the fabric is basically completely dry without water in 1 hour, and still maintains this level after 5 washes. After 5 washes in a regular household washing machine, the rough surface texture of the sweater is still clearly visible, and there is no obvious pilling compared to the appearance before washing.

[0047] Example Two

[0048] 1. Yarn raw material: 600D polyester, with a single filament fineness of about 1.5D, composed of 200D black polyester, 200D cationic modified polyester, and 200D conventional polyester; ultra-fine denier polyester or irregular cross-section polyester uses 100D polyester, 144F ultra-fine denier polyester or 48F irregular cross-section polyester can be used, this case uses 100D / 144F cross-section as a case for discussion, and the same applies to others.

[0049] 2. Weaving process: this case uses a 30-inch 12G towel machine commonly used in the factory as an example, knitted into a reverse pack terry organization, the knitting diagram is shown in Figure 1 The 600D thick denier polyester is the face yarn, and the 100D / 144F ultra-fine denier polyester is the ground yarn, with the face yarn always on the front and back of the fabric. The 600D thick denier polyester has a length of 60.5cm / 50 needles, and the 100D / 144F ultra-fine denier polyester has a length of 31.8cm / 50 needles.

[0050] 3. Dyeing process: the dyeing process includes pretreatment, polyester dyeing, and post-treatment.

[0051] Pre-treatment auxiliary formulation:

[0052] Refining agent for synthetic fiber WX-240 1 g / L

[0053] Cationic modified polyester dyeing auxiliary formulation:

[0054] Moisture absorption and quick-drying auxiliary for polyester 2 g / L

[0055] Anti-precipitation agent AP 1 g / L

[0056] Acid chelating dispersant HS 1.5 g / L

[0057] Dispersing and leveling agent RM-7025 0.5 g / L

[0058] Glacial acetic acid 1.7 g / L

[0059] Sodium acetate 0.15 g / L

[0060] Post-treatment auxiliary formulation:

[0061] Soda 2.0 g / L

[0062] Scouring agent Sc 2.0 g / L

[0063] Sodium hydrosulfite 6.0 g / L

[0064] Moisture absorption and quick-drying auxiliary for polyester 4.0 g / L

[0065] Citric acid 0.5 g / L

[0066] Process flow:

[0067] (1) Pre-treatment process flow: first add the above-mentioned pre-treatment auxiliary formulation at room temperature, heat to 80℃ at a rate of 2℃ / min, keep for 25 min, then cool to 70℃ at a rate of 1℃ / min and drain, the pre-treatment process curve is shown in the attached Figure 2 ;

[0068] (2) Dyeing process flow: add the above-mentioned polyester dyeing auxiliary at 35℃, heat to 50℃ at a rate of 5℃ / min, add polyester dye, heat to 80℃ at a rate of 2℃ / min, then heat to 130℃ at a rate of 1℃ / min, keep for 45 min, then cool to 100℃ at a rate of 0.7℃ / min, then cool to 70℃ at a rate of 1℃ / min and drain, the dyeing process curve is shown in the attached Figure 3 .

[0069] (3) Post-treatment process flow: after polyester dyeing, wash with soda, sodium hydrosulfite, and scouring agent Sc, and finally add citric acid.

[0070] The dyeing machine is a Rikkyo overflow dyeing machine, the main pump rotation speed is 60, the lifting wheel speed is 120, the nozzle position is 90, the 60S / turn, and the gap is 4.

[0071] 5. After-finishing process: drying after dyeing, then adding moisture-absorbing and quick-drying finishing agent and raising agent, and then double-side raising, carding, shearing and shaking.

[0072] 6. Final setting, setting temperature 130℃, speed 25-30 m / min, adding anti-static agent and softener.

[0073] The finished fabric produced by the above process is multi-color gray effect, with rough texture, as shown below. Figure 4 The effective width is 160cm+5cm, the square meter weight is 280g±10g, the thickness is 4.65mm, the heat preservation rate is 58.9%, and the anti-pilling level is 3. The water absorption test is by drop method, and all water is absorbed within 1 second. The quick-drying test is that about 0.3ml water is dropped under standard environment, and the residual water is less than 18% after 60 minutes, that is, the fabric is basically completely dried without water within 1 hour, and the level is still maintained after 5 times of washing. After 5 times of washing in a conventional household washing machine, the rough surface texture of the wool-like sweater is still clear, and there is no obvious pilling compared with the appearance before washing.

[0074] The specific embodiments described herein are merely illustrative of the spirit of the present application. Those skilled in the art of the present application can make various modifications or supplements to the described specific embodiments or replace them with similar ways, without deviating from the spirit of the present application or exceeding the scope defined by the appended claims.

Claims

1. A polyester wool-like sweater bulky terry knit fabric, characterized by, The face yarn is thick and coarse polyester filament for relatively weft-knitting, and the ground yarn is ultra-fine denier polyester or profile cross-section polyester; the face yarn and the ground yarn are interwoven into reverse-packing terry structure, and the face yarn is always on the front and back of the fabric, the ground yarn is always in the middle of the fabric, the ground yarn is covered by the face yarn, and the relative positions of the two are kept unchanged.

2. The polyester wool-like sweater bulky terry knit fabric according to claim 1, wherein, The thick and coarse polyester filament has a denier range of 600D-900D, and the polyester ply yarn has a single filament fineness range of 3.0D-1.5D, and is composed of double or multiple pure polyester filaments.

3. The polyester wool-like sweater bulky terry knit fabric according to claim 1, wherein, The thick and coarse polyester filament has a denier range of 600D-900D, and the polyester ply yarn has a single filament fineness range of 3.0D-1.5D, and is composed of three kinds of composite of polyester colored yarn, cationic modified polyester and pure polyester filament.

4. The polyester wool-like sweater bulky terry knit fabric according to claim 1, wherein, The ultra-fine denier polyester is polyester fiber with a single fiber fineness less than 1D.

5. The polyester wool-like sweater bulky terry knit fabric according to claim 1, wherein, The profile cross-section polyester is polyester with a cross-section in the shape of cross or Y or H formed by a spinneret.

6. A method of making the polyester wool-like terry knit fabric of any of claims 1-5, characterized in that, The method comprises the following steps: S1, pre-treatment process flow: first add pre-treatment auxiliary at room temperature, heat up to 80℃ at a rate of 2℃ / min, keep warm for 25min, then cool down to 70℃ at a rate of 1℃ / min and drain; S2, dyeing process flow: add polyester dyeing auxiliary at 35℃, heat up to 50℃ at a rate of 5℃ / min, add polyester dye, heat up to 80℃ at a rate of 2℃ / min, then heat up to 130℃ at a rate of 1℃ / min, keep warm for 45min, then cool down to 100℃ at a rate of 0.7℃ / min, then cool down to 70℃ at a rate of 1℃ / min and drain; S3, post-treatment process flow: after the completion of polyester dyeing, clean with sheet alkali, safety powder and cleaning agent Sc, and finally add citric acid; S4, post-finishing process: after dyeing, dry, then add moisture absorption and quick drying finishing agent and raising agent, then double-side raise, comb, cut and shake; S5, final setting, setting temperature 130℃, speed 25-30m / min, add anti-static agent and softening agent.

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