CN113981554A - Production process of warp female yarn divided sheath-core type polyester monofilament - Google Patents
Production process of warp female yarn divided sheath-core type polyester monofilament Download PDFInfo
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- CN113981554A CN113981554A CN202111401307.9A CN202111401307A CN113981554A CN 113981554 A CN113981554 A CN 113981554A CN 202111401307 A CN202111401307 A CN 202111401307A CN 113981554 A CN113981554 A CN 113981554A
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- polyester
- drying
- monofilament
- sheath
- chip
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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
- D01D13/00—Complete machines for producing artificial threads
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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
- D01D1/00—Treatment of filament-forming or like material
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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
- D01D1/00—Treatment of filament-forming or like material
- D01D1/06—Feeding liquid to the spinning head
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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
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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
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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
- D01D5/098—Melt spinning methods with simultaneous stretching
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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
- 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 discloses a production process of a warp female yarn splitting sheath-core type polyester monofilament, which comprises the following steps: drying, melt spinning to obtain mother yarn and monofilament; the drying step comprises: pre-crystallizing and drying a conventional polyester chip to obtain a polyester dry chip A, wherein the pre-crystallizing temperature of the conventional polyester chip is 160-170 ℃, the drying temperature is 150-170 ℃, the drying time is 6-8 hours, the moisture content of the polyester dry chip A is less than or equal to 0.003 percent, the low-melting polyester chip B is obtained by one of drum drying or continuous drying, the melting point of the low-melting polyester chip B is 110-230 ℃, the drying temperature is 60-130 ℃, the drying time is 8-30 hours, the drum drying vacuum degree is less than or equal to-0.093 MPa, and the moisture content of the low-melting polyester chip B is less than or equal to 0.0045 percent; the preparation process of the sheath-core type polyester monofilament has high production yield and uniform evenness, and a user uses sheath-core fibers without twisting.
Description
Technical Field
The invention relates to the technical field of polyester fibers, in particular to a production process of a warp female yarn divided sheath-core polyester monofilament.
Background
At present, 20D, 25D and 30D sheath-core thermal fuses used for Roman shades and filter screens manufactured in the market are all spun into multifilaments, and then are twisted and woven.
The prior art produces multiple F yarns (single yarn fineness is 2D-6D), broken yarns are easily generated in the production process, the broken yarns can cause the products to be easily broken in the unwinding, twisting and drawing processes, the full-package rate of twisted yarns is reduced, and the production efficiency is also reduced.
Chinese patent, patent number: CN102560708B discloses a process for producing hot-melt polyester monofilament with island-type cross section, comprising drying, melting, spinning, drawing and bonding steps. Wherein the polyester monofilament is formed by mutually adhering sheath-core composite filaments; the sheath layer of the sheath-core composite spinning is low-melting-point polyester, and the core layer is common polyester, wherein the weight percentage of the low-melting-point polyester is 30-50%, and the weight percentage of the common polyester is 70-50%; the density range of the sheath-core composite silk thread is 33dtex-167dtex, the density range of the finished hot-melt novel polyester monofilament is 35dtex-180dtex, and the finished hot-melt novel polyester monofilament has an island-shaped section, but the hot-melt novel polyester monofilament is spun into multifilament firstly, and then is woven into a curtain or a filter screen after being twisted into single strands.
Disclosure of Invention
In order to overcome the defects of the prior art, the invention provides: a production process of a primary yarn divided sheath-core polyester monofilament,
the technical scheme adopted by the invention is as follows: a production process of a mother yarn divided sheath-core polyester monofilament comprises the following steps: drying, melt spinning to obtain mother yarn and monofilament; the drying step comprises:
(1): and pre-crystallizing and drying the conventional polyester chip to obtain a polyester dry chip A, wherein the pre-crystallizing temperature of the conventional polyester chip is 160-170 ℃, the drying temperature is 150-170 ℃, and the drying time is 6-8 hours, so that the water content of the polyester dry chip A is less than or equal to 0.003 percent.
(2): the low-melting-point polyester chip is dried by one of drum drying or continuous drying to obtain a low-melting-point polyester dry chip B, the melting point of the low-melting-point polyester chip B is 110-;
preferably, the melt spinning step comprises: metering the polyester dry slice A and the low-melting-point polyester slice B by a spinning metering pump, and then, adopting a weight ratio of 30-50: 50-70 respectively enter into respective screw extruder to be extruded, and enter into a composite box to be spun.
Preferably, the method for preparing the female wire comprises the following steps: a one-step FDY drafting method for preparing a master thread and a two-step DT drafting method for preparing the master thread.
Preferably, the one-step method for preparing the master yarn by FDY drafting comprises the following steps: the number of spinneret holes in the composite spinning assembly is 2-10, the temperature of a screw B is 180-.
Preferably, the two-step DT drafting method for preparing the female yarn comprises the following steps: 2-10 spinneret holes in a composite spinneret assembly, the temperature of a screw B is 180-.
Preferably, the monofilament making is to make the female filaments into the monofilaments by using a female filament dividing machine.
Preferably, the prepared monofilament is a sheath-core structure fiber, the sheath layer is 160-DEG C190-DEG C low-melting point polyester, and the core layer is 240-DEG C270-DEG C conventional polyester.
Preferably, the finished monofilament has the following physical characteristics:
compared with the prior art, the invention has the beneficial effects that:
(1) the production of the sheath-core fiber has high yield and uniform evenness, and the twisting is not needed when the sheath-core fiber is used by customers.
(2) The monofilament type (the single yarn fineness is 20D-70D) produced by the invention has no broken filament problem, and the invention also saves twisting process for users, greatly reduces the production cost of the users, and improves the yield by more than 50 percent compared with the prior art by adopting the technical scheme of the invention.
Drawings
FIG. 1 is a flow chart of the production process of a skin-core polyester monofilament divided by female yarns.
Detailed Description
Example one
Pre-crystallizing 50KG of a conventional polyester chip, and drying to obtain a polyester dry chip A, wherein the pre-crystallizing temperature of the conventional polyester chip is 170 ℃, the drying temperature is 170 ℃, and the drying time is 8 hours, so that the water content of the polyester dry chip A is 0.002%;
and (2) carrying out drum drying or continuous drying on the low-melting-point polyester chip 50KG to obtain a low-melting-point polyester chip B, wherein the melting point of the low-melting-point polyester chip B is 178 ℃, the drying temperature is 130 ℃, the drying time is 12 hours, the drum drying vacuum degree is less than or equal to-0.093 Mpa, and the water content of the low-melting-point polyester chip B is less than or equal to 0.0045%. Metering the polyester dry slice A and the low-melting-point polyester slice B by a spinning metering pump, and then adopting a weight ratio of 35:65 respectively entering into respective screw extruders to extrude, and entering into a composite box to carry out spinning.
A method for preparing a female yarn by adopting one-step FDY drafting comprises the following steps:
setting the number of spinneret holes in the composite spinning assembly to be 5, setting the temperature of a screw B to be 180-230 ℃, adopting low-temperature biphenyl LD-181 as a box heating medium, setting the temperature of the box to be 220 ℃, the temperature of a screw A to be 270-290 ℃, the temperature of the box to be 290 ℃, the temperature of lateral blowing to be 23 ℃, the wind speed to be 0.5-0.7M/S, the temperature of a winding room to be less than or equal to 23 ℃, oiling guide wires, the composite polyester dry slice A and the low-melting polyester slice B are sprayed out from a spinneret plate through three-stage hot roll stretching, wherein the first-stage hot roll temperature is 100 ℃, the winding speed is 1200M/min, the second-stage hot roll temperature is 135 ℃, the winding speed is 3980M/min, the third-stage hot roll temperature is 120 ℃, the winding speed is 4000M/min, then cooling by a side blowing device, and then stretching and rolling to obtain the skin-core female yarn, wherein the skin-core female yarn is prepared without a network in the production process.
Then, the female silk is made into monofilaments through a female silk dividing machine, and the made monofilaments have the following physical indexes:
example two:
pre-crystallizing 50KG of a conventional polyester chip, and drying to obtain a polyester dry chip A, wherein the pre-crystallizing temperature of the conventional polyester chip is 170 ℃, the drying temperature is 170 ℃, and the drying time is 8 hours, so that the water content of the polyester dry chip A is 0.002%;
and (2) carrying out drum drying or continuous drying on the low-melting-point polyester chip 50KG to obtain a low-melting-point polyester dry chip B, wherein the melting point of the low-melting-point polyester chip B is 178 ℃, the drying temperature is 130 ℃, the drying time is 12 hours, the drum drying vacuum degree is less than or equal to-0.093 Mpa, and the water content of the low-melting-point polyester chip B is less than or equal to 0.0045%.
Metering the polyester dry slice A and the low-melting-point polyester slice B by a spinning metering pump, mixing and compounding according to the weight ratio of 35:65, and drafting by a two-step method DT to prepare a female yarn method, wherein the method comprises the following steps: 5 spinneret holes in the composite spinneret assembly, the temperature of a screw B is 180-230 ℃, the temperature of a box body is 220 ℃, the temperature of a screw A is 270-290 ℃, the temperature of the box body is 290 ℃, the temperature of lateral blowing is 23 ℃, the wind speed is 0.5-0.7M/S, the temperature of a winding room is less than or equal to 23 ℃, oiling is carried out on an oil tanker, the spinning speed is 2000M/min, the compounded low-melting-point polyester chip B and the polyester dry chip A are ejected out of the spinneret plate, then cooling is carried out through a lateral blowing device to prepare POY composite fiber, and the POY composite fiber is drafted through a drafting machine to prepare DT sheath-core female filaments, wherein the drafting temperature is 95 ℃, the drafting multiple is 1.8-2.4 times, and the drafting speed is 900M/min. Then the core-sheath female silk is obtained by stretching and rolling.
Then, the female silk is made into monofilaments through a female silk dividing machine, and the made monofilaments have the following physical indexes:
Claims (8)
1. a production process of a mother yarn divided sheath-core polyester monofilament is characterized by comprising the following steps: drying, melt spinning to obtain mother yarn and monofilament;
the drying step comprises:
(1): pre-crystallizing and drying a conventional polyester chip to obtain a polyester dry chip A, wherein the pre-crystallizing temperature of the conventional polyester chip is 160-170 ℃, the drying temperature is 150-170 ℃, and the drying time is 6-8 hours, so that the water content of the polyester dry chip A is less than or equal to 0.003 percent;
(2): and drying the low-melting-point polyester chip by one of a drum drying mode or a continuous drying mode to obtain a low-melting-point polyester dry chip B, wherein the melting point of the low-melting-point polyester chip B is 110-.
2. The process for producing a split core-sheath polyester monofilament as claimed in claim 1, wherein the melt spinning step comprises: metering the polyester dry slice A and the low-melting-point polyester slice B by a spinning metering pump, and then, adopting a weight ratio of 30-50: 50-70 respectively enter into respective screw extruder to be extruded, and enter into a composite box to be spun.
3. The process for producing core-sheath polyester monofilament through female yarn splitting according to claim 2, wherein the method for producing female yarn comprises: a one-step FDY drafting method for preparing a master thread and a two-step DT drafting method for preparing the master thread.
4. The production process of the split core-sheath polyester monofilament of the female yarn as claimed in claim 3, wherein the one-step FDY drafting method for preparing the female yarn comprises: the number of spinneret holes in the composite spinning assembly is 2-10, the temperature of a screw B is 180-.
5. The process for producing core-sheath polyester monofilament through female yarn splitting according to claim 3, wherein the two-step DT drafting method for producing female yarn comprises: 2-10 spinneret holes in a composite spinneret assembly, the temperature of a screw B is 180-.
6. The process for producing sheath-core polyester monofilament by female filament splitting according to claim 1, wherein the step of forming the monofilament is to form the female filament into the monofilament by a female filament splitting machine.
7. The process for producing filament-divided sheath-core polyester monofilament as claimed in claim 6, wherein the produced monofilament is a sheath-core structure fiber, the sheath layer is a 190 ℃ low melting point polyester, and the core layer is a 240 ℃ conventional polyester.
8. The process for producing the female split sheath-core polyester monofilament as claimed in any one of claims 1 to 7, wherein the produced monofilament has the following physical properties:
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202111401307.9A CN113981554A (en) | 2021-11-24 | 2021-11-24 | Production process of warp female yarn divided sheath-core type polyester monofilament |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202111401307.9A CN113981554A (en) | 2021-11-24 | 2021-11-24 | Production process of warp female yarn divided sheath-core type polyester monofilament |
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| CN113981554A true CN113981554A (en) | 2022-01-28 |
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Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101619506A (en) * | 2009-08-06 | 2010-01-06 | 浙江理工大学 | Method for preparing sheath core composite long fiber with low melting point |
| CN102493051A (en) * | 2011-12-06 | 2012-06-13 | 绍兴文理学院 | Hot-melt novel polyester monofilament with island-shaped section |
| CN102560708A (en) * | 2011-12-06 | 2012-07-11 | 绍兴文理学院 | Production technology of novel hot-melting polyester monofilament with island-shaped cross section |
| CN103243399A (en) * | 2013-04-24 | 2013-08-14 | 浙江古纤道股份有限公司 | Preparation method of dark island polyester fully drawn yarn |
| CN104831417A (en) * | 2015-05-25 | 2015-08-12 | 四川大学 | Polyester elastomer/PET composite elastic fiber and preparation method thereof |
| CN106400140A (en) * | 2016-11-14 | 2017-02-15 | 浙江理工大学 | Processing technology of low-melting-point sheath-core composite filament |
-
2021
- 2021-11-24 CN CN202111401307.9A patent/CN113981554A/en active Pending
Patent Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101619506A (en) * | 2009-08-06 | 2010-01-06 | 浙江理工大学 | Method for preparing sheath core composite long fiber with low melting point |
| CN102493051A (en) * | 2011-12-06 | 2012-06-13 | 绍兴文理学院 | Hot-melt novel polyester monofilament with island-shaped section |
| CN102560708A (en) * | 2011-12-06 | 2012-07-11 | 绍兴文理学院 | Production technology of novel hot-melting polyester monofilament with island-shaped cross section |
| CN103243399A (en) * | 2013-04-24 | 2013-08-14 | 浙江古纤道股份有限公司 | Preparation method of dark island polyester fully drawn yarn |
| CN104831417A (en) * | 2015-05-25 | 2015-08-12 | 四川大学 | Polyester elastomer/PET composite elastic fiber and preparation method thereof |
| CN106400140A (en) * | 2016-11-14 | 2017-02-15 | 浙江理工大学 | Processing technology of low-melting-point sheath-core composite filament |
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