CN113279075B - Manufacturing process of superfine denier PE and PET bi-component composite short fiber - Google Patents
Manufacturing process of superfine denier PE and PET bi-component composite short fiber Download PDFInfo
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- CN113279075B CN113279075B CN202110609721.2A CN202110609721A CN113279075B CN 113279075 B CN113279075 B CN 113279075B CN 202110609721 A CN202110609721 A CN 202110609721A CN 113279075 B CN113279075 B CN 113279075B
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- D—TEXTILES; PAPER
- D01—NATURAL OR MAN-MADE THREADS OR FIBRES; SPINNING
- D01D—MECHANICAL METHODS OR APPARATUS IN THE MANUFACTURE OF ARTIFICIAL FILAMENTS, THREADS, FIBRES, BRISTLES OR RIBBONS
- D01D5/00—Formation of filaments, threads, or the like
- D01D5/28—Formation of filaments, threads, or the like while mixing different spinning solutions or melts during the spinning operation; Spinnerette packs therefor
- D01D5/30—Conjugate filaments; Spinnerette packs therefor
- D01D5/34—Core-skin structure; Spinnerette packs therefor
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- D—TEXTILES; PAPER
- D01—NATURAL OR MAN-MADE THREADS OR FIBRES; SPINNING
- D01D—MECHANICAL METHODS OR APPARATUS IN THE MANUFACTURE OF ARTIFICIAL FILAMENTS, THREADS, FIBRES, BRISTLES OR RIBBONS
- D01D10/00—Physical treatment of artificial filaments or the like during manufacture, i.e. during a continuous production process before the filaments have been collected
- D01D10/02—Heat treatment
-
- D—TEXTILES; PAPER
- D01—NATURAL OR MAN-MADE THREADS OR FIBRES; SPINNING
- D01D—MECHANICAL METHODS OR APPARATUS IN THE MANUFACTURE OF ARTIFICIAL FILAMENTS, THREADS, FIBRES, BRISTLES OR RIBBONS
- D01D5/00—Formation of filaments, threads, or the like
- D01D5/08—Melt spinning methods
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- D—TEXTILES; PAPER
- D01—NATURAL OR MAN-MADE THREADS OR FIBRES; SPINNING
- D01D—MECHANICAL METHODS OR APPARATUS IN THE MANUFACTURE OF ARTIFICIAL FILAMENTS, THREADS, FIBRES, BRISTLES OR RIBBONS
- D01D5/00—Formation of filaments, threads, or the like
- D01D5/08—Melt spinning methods
- D01D5/088—Cooling filaments, threads or the like, leaving the spinnerettes
-
- D—TEXTILES; PAPER
- D01—NATURAL OR MAN-MADE THREADS OR FIBRES; SPINNING
- D01D—MECHANICAL METHODS OR APPARATUS IN THE MANUFACTURE OF ARTIFICIAL FILAMENTS, THREADS, FIBRES, BRISTLES OR RIBBONS
- D01D5/00—Formation of filaments, threads, or the like
- D01D5/12—Stretch-spinning methods
- D01D5/14—Stretch-spinning methods with flowing liquid or gaseous stretching media, e.g. solution-blowing
-
- D—TEXTILES; PAPER
- D01—NATURAL OR MAN-MADE THREADS OR FIBRES; SPINNING
- D01D—MECHANICAL METHODS OR APPARATUS IN THE MANUFACTURE OF ARTIFICIAL FILAMENTS, THREADS, FIBRES, BRISTLES OR RIBBONS
- D01D5/00—Formation of filaments, threads, or the like
- D01D5/26—Formation of staple fibres
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- D—TEXTILES; PAPER
- D01—NATURAL OR MAN-MADE THREADS OR FIBRES; SPINNING
- D01F—CHEMICAL FEATURES IN THE MANUFACTURE OF ARTIFICIAL FILAMENTS, THREADS, FIBRES, BRISTLES OR RIBBONS; APPARATUS SPECIALLY ADAPTED FOR THE MANUFACTURE OF CARBON FILAMENTS
- D01F8/00—Conjugated, i.e. bi- or multicomponent, artificial filaments or the like; Manufacture thereof
- D01F8/04—Conjugated, i.e. bi- or multicomponent, artificial filaments or the like; Manufacture thereof from synthetic polymers
- D01F8/06—Conjugated, i.e. bi- or multicomponent, artificial filaments or the like; Manufacture thereof from synthetic polymers with at least one polyolefin as constituent
-
- D—TEXTILES; PAPER
- D01—NATURAL OR MAN-MADE THREADS OR FIBRES; SPINNING
- D01F—CHEMICAL FEATURES IN THE MANUFACTURE OF ARTIFICIAL FILAMENTS, THREADS, FIBRES, BRISTLES OR RIBBONS; APPARATUS SPECIALLY ADAPTED FOR THE MANUFACTURE OF CARBON FILAMENTS
- D01F8/00—Conjugated, i.e. bi- or multicomponent, artificial filaments or the like; Manufacture thereof
- D01F8/04—Conjugated, i.e. bi- or multicomponent, artificial filaments or the like; Manufacture thereof from synthetic polymers
- D01F8/14—Conjugated, i.e. bi- or multicomponent, artificial filaments or the like; Manufacture thereof from synthetic polymers with at least one polyester as constituent
Abstract
The invention relates to the technical field of fiber manufacturing, in particular to a manufacturing process of a fine denier PE and PET bi-component composite short fiber. According to the invention, the third monomer is added into the PET to destroy the degree of order of molecular chains, so that the orientation degree of the fiber in the spinning process is reduced, the post-spinning drafting of the fiber is improved, the design mode of non-uniform pore diameter of a spinneret plate is adopted, the melt pressure is averaged, the gradient blowing process is adopted, the cooling section is slowly carried out, the multi-channel stretching process is adopted, the stretching multiplying power is effectively extended, the heat setting and drying process is relaxed, and the thermal stability of the fiber is improved.
Description
Technical Field
The invention relates to the technical field of fiber manufacturing, in particular to a manufacturing process of a superfine denier PE and PET bi-component composite short fiber.
Background
The PE and PET (polyethylene/polyethylene terephthalate) bi-component composite fibers can be thermally bonded to form non-woven fabric by utilizing the low-melting-point characteristic of the skin layer, so that the use of a chemical adhesive is avoided, and the PE and PET bi-component composite fibers can be widely applied to sanitary materials such as paper diapers, sanitary towels and the like. With the improvement of living standard, people put forward more functional requirements on sanitary materials, and the sanitary materials are expected to have the properties of comfort, softness and the like.
The fine denier fiber is a new fiber synthesis technology developing towards high technology direction, and the fine denier fiber has the following properties: 1. the diameter is very small, the bending rigidity is very small, and the fiber hand feeling is very soft; 2. the specific area is large, the fluffiness and the heat preservation of the fiber are obviously improved, and the fiber has waterproof and breathable effects; 3. the fibers have micro pores to form a capillary structure, and the water absorption and water conductivity are good.
The conventional staple fiber processing method is carried out by a spinning-drafting two-part process, and the PE and PET bi-component composite fiber cannot break through the bottleneck of fineness below 1.5D due to limited spinning elongation. The fineness is 0.6-1.2D, and the fiber can be called as micro-fine fiber. The fine denier composite fiber can endow sanitary products with extremely fine hand feeling, improve the moisture absorption and air permeability of hydrophobic fiber, and have quick water guide effect to bring surface layer comfort, so the fine denier bi-component composite fiber represents a high-end sanitary material.
The existing spinning technology usually adopts high-speed spinning, high orientation degree is easily formed in the spinning process, and the stretching multiple cannot be greatly improved in the back drafting process. The bicomponent PE and PET composite fiber can only obtain fineness of more than 1.5D, so the manufacturing process of the superfine denier PE and PET bicomponent composite short fiber is provided for solving the problems.
Disclosure of Invention
The invention aims to provide a manufacturing process of a superfine denier PE and PET bi-component composite short fiber, wherein a third monomer is added into PET to destroy the order degree of a molecular chain, so that the orientation degree of the fiber in the spinning process is reduced, the post-spinning drafting of the fiber is improved, the melt pressure is averaged by adopting a design mode of uneven pore diameters of a spinneret plate, a gradient blowing process is adopted to slowly carry out a cooling section, a multi-channel stretching process is adopted, the stretching multiplying power is effectively extended, and the thermal stability of the fiber is improved by a loose heat setting drying process, and the processing process can effectively obtain the PE and PET superfine denier composite fiber of 0.6-0.8D, is mature in process and solves the problems in the background technology.
In order to achieve the purpose, the invention provides the following technical scheme:
a manufacturing process of fine denier PE and PET bi-component composite short fiber specifically comprises the following steps:
the method comprises the following steps: adding a third monomer into PET, and specifically operating as follows: adding a dispersing agent accounting for 0.1-1% of the total mass of the polymer and deionized water accounting for 3:1 of the total volume of the polymer into a reaction kettle, fully dissolving, putting an initiator accounting for 0.1-1% of the total mass of the polymer into a container, stirring into a uniform solution, adding into the reaction kettle, introducing nitrogen, stirring and heating to 80-90 ℃, reacting for 2-6h, increasing the reaction temperature to 90-100 ℃, continuing to react for 2-4h, stopping the reaction, taking out a product, washing and drying to obtain composite PET, wherein the polymer is a mixture of PET and a third monomer, and the PET accounts for 60-75% of the total mass of the polymer;
step two: taking PE as a skin layer, carrying out melt spinning at the temperature of 285-290 ℃, taking the composite PET as a core layer, carrying out spinning at the spinning temperature of 200-125 ℃, and carrying out spinning by utilizing a spinneret plate with uneven pore diameter to obtain PE and PET bi-component composite fiber yarns;
step three: gradient cooling is carried out on the PE and PET bi-component composite fiber yarns by adopting a gradient blowing process, wherein the temperature of first gradient cooling air is between 20 and 25 ℃, and the temperature of second gradient cooling air is between 15 and 18 ℃;
step four: stretching the PE and PET bi-component composite fiber yarns by utilizing a plurality of stretching processes, wherein a first stretching mechanism is arranged between a first gradient blowing process and a second gradient blowing process, the stretching multiple of the yarns is 2.5 times, the first stretching mechanism is arranged after the second gradient blowing process, and the stretching multiple of the yarns is 4.5-6 times in a stretching groove 55 ℃, a II stretching machine 60 ℃, a III stretching machine 65 ℃ and a first stretching mechanism;
step five: performing tension heat setting operation on the silk yarns by using a relaxation heat setting drying process, wherein the temperature of 105 ℃ is reserved on the surface of a tension heat setting roller, the silk yarns only pass through the surface of tension spokes, the curling temperature is 60 ℃, and the relaxation heat setting temperature is 55 ℃;
step six: and (3) carding and cutting the silk threads subjected to heat setting to obtain the PE and PET bi-component composite short fibers.
Preferably, in the third step, an oiling mechanism is arranged between the first gradient blowing process and the second gradient blowing process.
Preferably, the third monomer is one or a mixture of several of n-butyl methacrylate, beta hydroxyethyl methacrylate and acrylonitrile.
Preferably, the winding speed of the spinning in the second step is 960-1100 m/min.
Compared with the prior art, the invention has the beneficial effects that: the third monomer is added into the PET to destroy the order degree of molecular chains, thereby reducing the orientation degree of the fiber in the spinning process, improving the post-spinning drafting of the fiber, adopting the design mode of uneven pore diameter of a spinneret plate, averaging the pressure of a melt, adopting the gradient blowing process to slowly carry out a cooling section, adopting a multi-channel stretching process, effectively extending the stretching multiplying power, relaxing the heat setting drying process and improving the thermal stability of the fiber, and the processing process can effectively obtain the PE and PET micro-denier composite fiber with the particle size of 0.6-0.8D, is mature in process and suitable for popularization and use.
Detailed Description
The technical solutions in the embodiments of the present invention will be clearly and completely described below, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.
The invention provides a technical scheme that:
a manufacturing process of fine denier PE and PET bi-component composite short fiber specifically comprises the following steps:
the method comprises the following steps: adding a third monomer into PET, and specifically operating as follows: adding a dispersing agent accounting for 0.1-1% of the total mass of the polymer and deionized water accounting for 3:1 of the total volume of the polymer into a reaction kettle, fully dissolving, putting an initiator accounting for 0.1-1% of the total mass of the polymer into a container, stirring into a uniform solution, adding into the reaction kettle, introducing nitrogen, stirring and heating to 80-90 ℃, reacting for 2-6h, increasing the reaction temperature to 90-100 ℃, continuing to react for 2-4h, stopping the reaction, taking out a product, washing and drying to obtain composite PET, wherein the polymer is a mixture of PET and a third monomer, and the PET accounts for 60-75% of the total mass of the polymer;
step two: taking PE as a skin layer, carrying out melt spinning at the temperature of 285-290 ℃, taking the composite PET as a core layer, carrying out spinning at the spinning temperature of 200-125 ℃, and carrying out spinning by utilizing a spinneret plate with uneven pore diameter to obtain PE and PET bi-component composite fiber yarns;
step three: gradient cooling is carried out on the PE and PET bi-component composite fiber yarns by adopting a gradient blowing process, wherein the temperature of first gradient cooling air is between 20 and 25 ℃, and the temperature of second gradient cooling air is between 15 and 18 ℃;
step four: stretching the PE and PET bi-component composite fiber yarns by utilizing a plurality of stretching processes, wherein a first stretching mechanism is arranged between a first gradient blowing process and a second gradient blowing process, the stretching multiple of the yarns is 2.5 times, the first stretching mechanism is arranged after the second gradient blowing process, and the stretching multiple of the yarns is 4.5-6 times in a stretching groove 55 ℃, a II stretching machine 60 ℃, a III stretching machine 65 ℃ and a first stretching mechanism;
step five: performing tension heat setting operation on the silk yarns by using a relaxation heat setting drying process, wherein the temperature of 105 ℃ is reserved on the surface of a tension heat setting roller, the silk yarns only pass through the surface of tension spokes, the curling temperature is 60 ℃, and the relaxation heat setting temperature is 55 ℃;
step six: and (3) carding and cutting the silk threads subjected to heat setting to obtain the PE and PET bi-component composite short fibers.
And in the third step, an oiling mechanism is arranged between the first gradient blowing process and the second gradient blowing process.
Wherein the third monomer is one or a mixture of more of n-butyl methacrylate, beta hydroxyethyl methacrylate and acrylonitrile.
Wherein the winding speed of the spinning in the second step is 960-1100 m/min.
Although embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that changes, modifications, substitutions and alterations can be made in these embodiments without departing from the principles and spirit of the invention, the scope of which is defined in the appended claims and their equivalents.
Claims (3)
1. A manufacturing process of fine denier PE and PET bi-component composite short fiber is characterized in that: the method specifically comprises the following steps:
the method comprises the following steps: adding a third monomer into PET, wherein the third monomer is one of n-butyl methacrylate, beta-hydroxyethyl methacrylate and acrylonitrile, and the specific operation is as follows: adding a dispersing agent accounting for 0.1-1% of the total mass of the polymer and deionized water accounting for 3:1 of the total mass of the polymer into a reaction kettle, fully dissolving, putting an initiator accounting for 0.1-1% of the total mass of the polymer into a container, stirring into a uniform solution, adding the uniform solution into the reaction kettle, stirring and heating to 80-90 ℃, reacting for 2-6 hours, increasing the reaction temperature to 90-100 ℃, continuing to react for 2-4 hours, stopping the reaction, taking out a product, washing and drying to obtain composite PET, wherein the polymer is a mixture of PET and a third monomer, and the PET accounts for 60-75% of the total mass of the polymer;
step two: taking PE as a skin layer, carrying out melt spinning at the temperature of 285-290 ℃, taking the composite PET as a core layer, carrying out spinning at the spinning temperature of 200-125 ℃, and carrying out spinning by utilizing a spinneret plate with uneven pore diameter to obtain PE and PET bi-component composite fiber yarns;
step three: gradient cooling is carried out on the PE and PET bi-component composite fiber yarns by adopting a gradient blowing process, wherein the temperature of first gradient cooling air is between 20 and 25 ℃, and the temperature of second gradient cooling air is between 15 and 18 ℃;
step four: stretching the PE and PET bi-component composite fiber yarns by utilizing a plurality of stretching processes, wherein a first stretching mechanism is arranged between a first gradient blowing process and a second gradient blowing process, the stretching multiple of the yarns is 2.5 times, the first stretching mechanism is arranged after the second gradient blowing process, and the stretching multiple of the yarns is 4.5-6 times in a stretching groove 55 ℃, a II stretching machine 60 ℃, a III stretching machine 65 ℃ and a first stretching mechanism;
step five: performing tension heat setting operation on the silk yarns by using a relaxation heat setting drying process, wherein the temperature of 105 ℃ is reserved on the surface of a tension heat setting roller, the silk yarns only pass through the surface of tension spokes, the curling temperature is 60 ℃, and the relaxation heat setting temperature is 55 ℃;
step six: and (3) carding and cutting the heat-set silk thread to obtain the 0.6-0.8D fine denier PE and PET bi-component composite short fiber.
2. The process of claim 1, wherein said process comprises the steps of: and in the third step, an oiling mechanism is arranged between the first gradient blowing process and the second gradient blowing process.
3. The process of claim 1, wherein said process comprises the steps of: the winding speed of the spinning in the second step is 960-1100 m/min.
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| CN202110609721.2A CN113279075B (en) | 2021-06-01 | 2021-06-01 | Manufacturing process of superfine denier PE and PET bi-component composite short fiber |
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| CN202110609721.2A CN113279075B (en) | 2021-06-01 | 2021-06-01 | Manufacturing process of superfine denier PE and PET bi-component composite short fiber |
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| CN113279075B true CN113279075B (en) | 2022-05-24 |
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Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1338010A (en) * | 1999-01-25 | 2002-02-27 | 3M创新有限公司 | Bicomponent microfibers |
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2917160B2 (en) * | 1990-02-14 | 1999-07-12 | チッソ株式会社 | Needle punched nonwoven fabric using sheath-core type composite fiber |
| CA2141768A1 (en) * | 1994-02-07 | 1995-08-08 | Tatsuro Mizuki | High-strength ultra-fine fiber construction, method for producing the same and high-strength conjugate fiber |
| JP3097019B2 (en) * | 1995-08-07 | 2000-10-10 | チッソ株式会社 | Heat-fusible composite fiber and nonwoven fabric using the fiber |
| WO2010014556A1 (en) * | 2008-07-28 | 2010-02-04 | The Dow Chemical Company | Fine denier partially oriented bicomponent fibers and flat and textured yarns for use in apparel |
| CN102864521B (en) * | 2012-10-16 | 2014-05-21 | 上海瑞贝卡纤维材料科技有限公司 | Cortex-core protein and polyacrylonitrile compound fiber and method for wigs |
| CN104562291B (en) * | 2014-11-12 | 2016-11-02 | 厦门翔鹭化纤股份有限公司 | A kind of fragrance composite short fiber and preparation method thereof |
| CN110359129B (en) * | 2019-06-14 | 2022-06-28 | 福建康百赛新材料有限公司 | Preparation method of microporous skin-core structure bi-component composite fiber |
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1338010A (en) * | 1999-01-25 | 2002-02-27 | 3M创新有限公司 | Bicomponent microfibers |
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