Modified polyester composite filament durable elastic woolen sweater and preparation method thereof

Abstract

The invention discloses a modified polyester composite filament durable elastic woolen sweater and a preparation method thereof. PET and PTT polyester composite filaments and wool or wool blended spun yarns are doubled to form composite yarns serving as a core, and the PET and PTT polyester composite filaments are stock solution colored or white self-crimping filaments; and the wool fabric has 10-40% tensile elasticity in the warp and weft directions. The woolen sweater has the advantages of stable and lasting elasticity, strong woolen feeling and simplicity and convenience in processing. The wool fabric with lasting elasticity, controllable elasticity, hank dyeing, wool feeling, strong force and high cost performance can be provided, and aiming at the problems that the existing wool spandex elastic fabric is easy to loosen and expose white, and the wool / high-temperature dyeable polyester elastic filament fabric is difficult to dye and easy to dye, the low-temperature dyeable self-crimping composite elastic white filament is adopted, through a Sirofil spinning or doubling twisting mode, by controlling the off-machine size of a flat knitting machine and the temperature, time and bath ratio of drying and washing, and by combining key process control such as spinning, hank dyeing and the like, the product is prepared.

Description

technical field

[0001] The invention relates to the technical field of novel textile materials, in particular to a durable elastic woolen sweater of modified polyester composite filament and a preparation method thereof. Background technique

[0002] Worsted wool knitting yarn is usually dyed by strip dyeing and then combed to achieve fiber dyeing, top color mixing, and spinning. This long-process color spinning process leads to a long process of R&D and proofing, and it is relatively difficult to realize different colors of the same sweater.

[0003] The main raw material of woolen sweater is wool short fiber, and the surface is covered with more or less scale layers, which makes its reflective performance for visible light very different from that of smooth synthetic fiber filaments, making synthetic fiber filaments difficult to use. In woolen sweaters, even dope-dyed filaments have the risk of having a different shade from wool fibers, resulting in color blooms and signi...

Examples

Embodiment 1

[0023] The invention provides a technical solution: a method for preparing a durable elastic sweater made of modified polyester composite filaments, the steps are as follows:

[0024] (1) Preparation of composite polyester filament: Polyethylene terephthalate (PET) and polytrimethylene terephthalate (PTT) are used in a composite ratio of 60 / 40 to obtain a fineness of 65D composite white silk; or add PET-based masterbatch and PTT-based masterbatch respectively in the spinning process to obtain composite yarn with the same fineness range and dope coloring;

[0025] (2) Yarn forming method: wrap the composite white silk or dope-dyed composite yarn in step (1) and 680Z twist / m 48Nm / 2100% wool spun yarn on the spinning frame, and twist to obtain a twist of 380S / m doubling yarn; control the doubling tension of wool yarn to 4.82g, and the doubling tension of filament to 2.32g, so that the composite white silk or composite yarn is in a state of straightening and not stretching, so as...

Embodiment 2

[0029] The invention provides a technical solution: a method for preparing a durable elastic sweater made of modified polyester composite filaments, the steps are as follows:

[0030] Select modified PET and PBT polyester composite filaments: slice PET with a viscosity of 0.8, slice PBT with a viscosity of 1.4, the fineness of modified PET and PBT polyester composite filaments is 330dtex, and the strength is 2.0cN / dtex. Put them into different melting boxes respectively, pass through their respective spinning channels to the spinneret, and extrude them side by side to obtain composite white silk and wool or wool blended spun yarn, the composite ratio is 70 / 30;

[0031] Spinning: the composite white silk and wool or wool blended spun yarn is spun through single or double filament Sirofil, paralleled, and twisted to obtain yarn, and the twist coefficient is controlled at 90; composite white silk and wool or wool blended The ratio of spun yarn is 10 / 90.

[0032] Dyeing: The obta...

technical field

[0001] The invention relates to the technical field of novel textile materials, in particular to a durable elastic woolen sweater of modified polyester composite filament and a preparation method thereof. Background technique

[0002] Worsted wool knitting yarn is usually dyed by strip dyeing and then combed to achieve fiber dyeing, top color mixing, and spinning. This long-process color spinning process leads to a long process of R&D and proofing, and it is relatively difficult to realize different colors of the same sweater.

[0003] The main raw material of woolen sweater is wool short fiber, and the surface is covered with more or less scale layers, which makes its reflective performance for visible light very different from that of smooth synthetic fiber filaments, making synthetic fiber filaments difficult to use. In woolen sweaters, even dope-dyed filaments have the risk of having a different shade from wool fibers, resulting in color blooms and signi...

Examples

Embodiment 1

[0023] The invention provides a technical solution: a method for preparing a durable elastic sweater made of modified polyester composite filaments, the steps are as follows:

[0024] (1) Preparation of composite polyester filament: Polyethylene terephthalate (PET) and polytrimethylene terephthalate (PTT) are used in a composite ratio of 60 / 40 to obtain a fineness of 65D composite white silk; or add PET-based masterbatch and PTT-based masterbatch respectively in the spinning process to obtain composite yarn with the same fineness range and dope coloring;

[0025] (2) Yarn forming method: wrap the composite white silk or dope-dyed composite yarn in step (1) and 680Z twist / m 48Nm / 2100% wool spun yarn on the spinning frame, and twist to obtain a twist of 380S / m doubling yarn; control the doubling tension of wool yarn to 4.82g, and the doubling tension of filament to 2.32g, so that the composite white silk or composite yarn is in a state of straightening and not stretching, so as...

Embodiment 2

[0029] The invention provides a technical solution: a method for preparing a durable elastic sweater made of modified polyester composite filaments, the steps are as follows:

[0030] Select modified PET and PBT polyester composite filaments: slice PET with a viscosity of 0.8, slice PBT with a viscosity of 1.4, the fineness of modified PET and PBT polyester composite filaments is 330dtex, and the strength is 2.0cN / dtex. Put them into different melting boxes respectively, pass through their respective spinning channels to the spinneret, and extrude them side by side to obtain composite white silk and wool or wool blended spun yarn, the composite ratio is 70 / 30;

[0031] Spinning: the composite white silk and wool or wool blended spun yarn is spun through single or double filament Sirofil, paralleled, and twisted to obtain yarn, and the twist coefficient is controlled at 90; composite white silk and wool or wool blended The ratio of spun yarn is 10 / 90.

[0032] Dyeing: The obta...