CN101177801A - A kind of bright polyester fiber and its manufacturing method - Google Patents

Abstract

The invention relates to a bright polyester fiber and a manufacturing method thereof. The fiber is composed of barium sulfate, a dispersant, and polyester PET slices; the preparation process includes: pre-surface-treated barium sulfate, dispersant, and PET slices are blended , to obtain a PET chip masterbatch containing barium sulfate; then melt and blend with Dayouguang PET chips through a screw extruder, and spin the finished product. The process is simpler, and the obtained fiber has good luster, which is stronger than the traditional polyester glossy yarn; the prepared fabric has a hand feeling, good drapability, and a brighter appearance, and is a high value-added textile raw material, which meets the market demand. .

Description

A kind of bright polyester fiber and its manufacturing method

technical field

The invention belongs to the field of polyester fibers, in particular to a bright polyester fiber and a manufacturing method thereof.

Background technique

With the improvement of social and economic development and people's living standards, the people have an urgent need for high-grade and comfortable clothing fabrics. Because of its comfortable fashion, good luster, sense of touch and good hand feeling, the market demand for bright polyester fiber is increasing. big. However, the glossy polyester fibers currently produced are poor in comfort and softness. The outer surface of the filaments has poor refraction and reflection effects on light, the luster is dim, and there are many hairs, which are easy to break. .

At present, most manufacturers use fiber-shaped cross-sections to achieve high-gloss fibers. The cross-section of the fiber usually adopts special-shaped cross-section, including triangular, trilobal, Y-shaped, W-shaped, figure-eight, etc. The fiber with a triangular cross-section is like a triangular dichroic prism, through the comprehensive effect of light reflection, refraction and interference, the fiber produces a super bright luster. Fibers with triangular cross-sections have been favored for this unique optical effect. However, the preparation of special-shaped fibers not only involves the design of the spinneret, the influence of the special flow form of the melt in the special-shaped section on the mechanical properties of the fibers, but also due to the large specific surface area of the special-shaped fiber and the relatively large melt elasticity. , resulting in a sharp increase in friction when the tow and the wire guide plate are in contact, and it is easy to produce cobweb threads, uneven threads, and uneven finished threads.

ZL03113436.X and 200310105548.4 respectively disclose a preparation method for improving the luster of sewing thread-type polyester fibers. The additive they use is nano barium sulfate; the preparation method adopted is a complex polymerization process from monomer to finished product, not only the production cycle long, the product efficiency is low, and a large number of polymerization technical parameters need to be mastered; and because the nano-inorganic particles have a large specific surface area and are easy to agglomerate, the polymerization method is used to prepare bright nanocomposites, even if the nanoparticles are uniformly dispersed in the unit before polymerization. In the polyester matrix, during the high-temperature polymerization process of up to 8 hours, the chance of nanoparticle agglomeration will be greatly enhanced, and severe agglomeration will occur in the polyester matrix, which will eventually affect the performance of the product. And by the analysis to existing data, it is not difficult to find the shortcoming of prior art.

Contents of the invention

The purpose of the present invention is to provide a kind of bright polyester fiber and its manufacture method, overcome the deficiencies in the prior art. The pre-surface-treated inorganic particles are mixed with dispersant and polyester chips at high speed, and granulated by a twin-screw extruder to obtain a PET chip masterbatch containing barium sulfate. The PET chip masterbatch containing barium sulfate and the PET chips of Daluguang are dried and blended with a screw extruder, spun through a spinning box, cooled, oiled, and wound to obtain Daluluster polyester fibers.

A bright polyester fiber of the present invention is composed of barium sulfate, a dispersant, and bright polyester (PET) slices.

The particle size range of the barium sulfate is 0.1-0.5 μm, and the mass fraction is 0.08-1%;

The dispersant is one or more mixtures of polyvinyl alcohol (PVA), ethylene-vinyl acetate copolymer (EVA) or polyethylene glycol (PEG), and its mass fraction is 0.1-1.0%.

The manufacture method of bright polyester fiber of the present invention comprises steps:

(1) Surface treatment of inorganic particles

Surface modification of barium sulfate with one or more mixtures of bis(2-ethylhexyl) sodium sulfosuccinate, sodium citrate, dodecanethiol, silane coupling agent, and titanate coupling agent deal with;

(2) Preparation of Dayouguang PET Chip Masterbatch Containing Barium Sulfate

After the surface-modified barium sulfate is mixed evenly with the Dayouguang PET chip high-speed mixer, the dispersant is added, and the twin-screw extruder is granulated. The speed is 10-20r/min, the temperature of each zone is 260-280°C, and the temperature of the die head is 260-270°C to prepare a bright PET chip masterbatch containing barium sulfate;

(3) Manufacture of bright polyester fiber

Mix the Daguang PET chip masterbatch containing barium sulfate with the Daluguang polyester (PET) chips, and melt-spin through the melt. The spinning temperature is 270-290°C, the spinning speed is 3000-4000m/min, and the side air is blown. The wind speed is 0.3-0.5m/s, the side blowing air temperature is 23-26°C, and the winding speed is 3000-4000m/min, so that the polyester fiber with large gloss can be obtained.

The surface treatment of inorganic particles in the present invention: adding inorganic particles with approximately the same refractive index as polyester, not only can not reduce the transmitted light and reflected light inside the fiber, but also obtain a large optical fiber, and also play the role of inorganic particles to reduce friction Function; the selected inorganic particles are barium sulfate (BaSO4) particles, because their refractive index (1.64) is very close to that of polyester fiber (1.55), it can not only maintain the good gloss of polyester, but also avoid the fiber after dyeing and finishing. At the same time, due to the peak-valley structure formed by the inorganic particles and the fiber matrix, it plays a role in reducing friction. Due to the large specific surface area and high surface activity of barium sulfate particles, which are easy to agglomerate, surface modification is required.

In addition, in the present invention, in order to obtain a mixed masterbatch with a good dispersion effect, a dispersant is added when the high-speed mixer is uniformly mixed.

Beneficial effects of the present invention:

(1) The process of this method is simpler, and the original process can be adjusted to produce;

(2) The luster of its fiber is better, stronger than the traditional polyester glossy yarn;

(3) The prepared fabric has better hand feeling, better drapability and brighter appearance, and is a textile raw material with high added value.

Detailed ways

Below in conjunction with specific embodiment, further illustrate the present invention. It should be understood that these examples are only used to illustrate the present invention and are not intended to limit the scope of the present invention. In addition, it should be understood that after reading the teachings of the present invention, those skilled in the art can make various changes or modifications to the present invention, and these equivalent forms also fall within the scope defined by the appended claims of the present application.

Example 1

Raw material composition:

(1) Formula of masterbatch

Polyester chips: 19kg;

Barium sulfate: 1kg;

PVA: 0.9kg;

(2) The formula of fiber

Polyester chips: 80kg;

Masterbatch: 20kg;

The barium sulfate surface-treated with sodium citrate is then mixed with dispersant and PET chips at high speed, and granulated by a twin-screw extruder to obtain a PET chip masterbatch containing barium sulfate. The PET chip masterbatch containing barium sulfate and the bright PET chip are extruded and blended by a screw, and the bright polyester fiber can be obtained after spinning in a spinning box, cooling, oiling and winding. Among them, twin-screw speed: 70r/min, thread speed: 20r/min, die head temperature: 270°C, spinning temperature 290°C, spinning speed 3600m/min, side blowing wind speed 0.5m/s, side blowing wind The temperature is 23°C. The obtained bright polyester fiber has high gloss and excellent hand feeling. The final mass fraction of barium sulfate is 1%.

Example 2

Raw material composition:

(1) Formula of masterbatch

Polyester chips: 19.5kg;

Barium sulfate: 0.5kg;

PEG: 0.5kg;

(2) The formula of fiber

Polyester chips: 80kg;

Masterbatch: 20kg;

The barium sulfate surface-treated with silane coupling agent is mixed with dispersant and PET chips at high speed, and pelletized by a twin-screw extruder to obtain a PET chip masterbatch containing barium sulfate. The PET chip masterbatch containing barium sulfate and the bright PET chips are blended through a screw extruder, and the bright polyester fiber can be obtained after spinning, cooling, oiling and winding through a spinning box. Among them, twin-screw speed: 65r/min, thread speed: 15r/min, die head temperature: 270°C, spinning temperature 285°C, spinning speed 3300m/min, side blowing wind speed 0.4m/s, side blowing wind The temperature is 24°C. The obtained bright polyester fiber has high gloss and excellent hand feeling. The final mass fraction of barium sulfate is 0.5%.

Example 3

Raw material composition:

(1) Formula of masterbatch

Polyester chips: 9.9kg;

Barium sulfate: 0.1kg;

EVA: 0.1kg;

(2) The formula of fiber

Polyester chips: 90kg;

Masterbatch: 10kg;

Barium sulfate surface-treated with titanate coupling agent, mixed with dispersant and PET chips at high speed, pelletized by twin-screw extruder to obtain PET chip masterbatch containing barium sulfate. The PET chip masterbatch containing barium sulfate and the bright PET chips are blended through a screw extruder, and the bright polyester fiber can be obtained after spinning, cooling, oiling and winding through a spinning box. Among them, twin-screw speed: 70r/min, thread speed: 20r/min, die temperature: 270°C, spinning temperature: 280°C, spinning speed: 3000m/min, side blowing wind speed: 0.5m/s, side blowing wind The temperature is 23°C. The obtained bright polyester fiber has high gloss and excellent hand feeling. The final mass fraction of barium sulfate is 0.1%.

Claims (4)

1. lustrous polyester fiber is characterized in that: this fiber is made up of barium sulfate, dispersant, big glossy polyester PET section.

2. lustrous polyester fiber according to claim 1 is characterized in that: the particle size range of described barium sulfate is at 0.1～0.5 μ m, and mass fraction is 0.08～1%.

3. lustrous polyester fiber according to claim 1 is characterized in that: described dispersant is one or more mixtures among PVAC polyvinylalcohol, ethylene-vinyl acetate copolymer EVA or the polyethylene glycol PEG, and its mass fraction is 0.1～1.0%.

4. the manufacture method of a lustrous polyester fiber comprises step:

(1) surface treatment of inorganic particles

With one or more mixtures in two (2-ethylhexyl) sodium sulfosuccinate, natrium citricum, lauryl mercaptan, silane coupler, the titanate coupling agent barium sulfate is carried out surface modification treatment;

(2) contain the preparation that light PET section master batch is arranged greatly of barium sulfate

The barium sulfate of surface modification with have light PET section homogenizer mix greatly after, add dispersant, the double screw extruder granulation, twin-screw speed 40～70r/min, draw bar speed 10～20r/min, each distinguishes 260～280 ℃ of temperature, 260～270 ℃ of die head temperatures, make contain barium sulfate light PET section masterbatch arranged greatly;

(3) manufacturing of lustrous polyester fiber

The light PET section masterbatch that has greatly that will contain barium sulfate mixes with light PET section is arranged greatly, through the melt melt spinning, 270～290 ℃ of spinning temperatures, spinning speed 3000～4000m/min, wind speed 0.3～the 0.5m/s of lateral blowing, 23～26 ℃ of lateral blowing wind-warm syndrome, winding speed 3000～4000m/min makes lustrous polyester fiber.