KR101766903B1 - Low melting point polyester fiber and manufacturing method thereof - Google Patents
Low melting point polyester fiber and manufacturing method thereof Download PDFInfo
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- KR101766903B1 KR101766903B1 KR1020160018595A KR20160018595A KR101766903B1 KR 101766903 B1 KR101766903 B1 KR 101766903B1 KR 1020160018595 A KR1020160018595 A KR 1020160018595A KR 20160018595 A KR20160018595 A KR 20160018595A KR 101766903 B1 KR101766903 B1 KR 101766903B1
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- point polyester
- polyester fiber
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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
- D01F6/00—Monocomponent artificial filaments or the like of synthetic polymers; Manufacture thereof
- D01F6/58—Monocomponent artificial filaments or the like of synthetic polymers; Manufacture thereof from homopolycondensation products
- D01F6/62—Monocomponent artificial filaments or the like of synthetic polymers; Manufacture thereof from homopolycondensation products from polyesters
-
- 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
- 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
- D01D10/06—Washing or drying
-
- 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
-
- 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
- D01F1/00—General methods for the manufacture of artificial filaments or the like
- D01F1/02—Addition of substances to the spinning solution or to the melt
- D01F1/10—Other agents for modifying properties
-
- D—TEXTILES; PAPER
- D10—INDEXING SCHEME ASSOCIATED WITH SUBLASSES OF SECTION D, RELATING TO TEXTILES
- D10B—INDEXING SCHEME ASSOCIATED WITH SUBLASSES OF SECTION D, RELATING TO TEXTILES
- D10B2331/00—Fibres made from polymers obtained otherwise than by reactions only involving carbon-to-carbon unsaturated bonds, e.g. polycondensation products
- D10B2331/04—Fibres made from polymers obtained otherwise than by reactions only involving carbon-to-carbon unsaturated bonds, e.g. polycondensation products polyesters, e.g. polyethylene terephthalate [PET]
-
- D—TEXTILES; PAPER
- D10—INDEXING SCHEME ASSOCIATED WITH SUBLASSES OF SECTION D, RELATING TO TEXTILES
- D10B—INDEXING SCHEME ASSOCIATED WITH SUBLASSES OF SECTION D, RELATING TO TEXTILES
- D10B2401/00—Physical properties
- D10B2401/04—Heat-responsive characteristics
-
- D—TEXTILES; PAPER
- D10—INDEXING SCHEME ASSOCIATED WITH SUBLASSES OF SECTION D, RELATING TO TEXTILES
- D10B—INDEXING SCHEME ASSOCIATED WITH SUBLASSES OF SECTION D, RELATING TO TEXTILES
- D10B2401/00—Physical properties
- D10B2401/06—Load-responsive characteristics
- D10B2401/063—Load-responsive characteristics high strength
Abstract
Description
The present invention relates to a low melting point polyester fiber and a process for producing the same. Specifically, the present invention relates to a low-melting-point polyester fiber having a high shrinkage percentage and a high fusion-bonding performance at low temperatures, which is excellent in adhesiveness, as compared with a cis-core type polyester fiber.
In general, polyester has excellent mechanical properties, heat resistance, moldability, and chemical resistance, and is used in a wide range of applications in fields such as fibers, films, and bottle molded products. Polyethers such as polyethylene terephthalate (PET), polytrimethyleneterephthalate (PTT), and polybutyleneterephthalate (PBT) are widely used in various fields.
However, polyesters often have limited applications due to their high melting point. For example, when it is used in applications such as wicking in the application of fibers or the like, or in the use of an adhesive which is inserted between cloths on a tape and pressure-bonded, the heating is performed, There is a disadvantage that it is necessary to use special equipment such as a high frequency sewing machine. In addition, a chemical resin adhesive is used in order to bond the fiber and the fiber during the production of the nonwoven fabric, which causes a problem that the machine is contaminated and the working environment is poor and the productivity is lowered.
In recent years, a low-melting-point polyester having a low melting point has been produced in order to solve the problem of the polyester as described above, and researches for producing a low-melting-point polyester fiber by spinning the low- .
In Korean Patent No. 10-1216690, a low-melting-point polyester short fiber was prepared by co-spinning a low-melting-point polyester and a general polyester having a high melting point in a sheath-core type. However, since the general polyester is used in the core portion, it must be processed at a high temperature during processing, so that physical properties are lowered due to curing of the polyester in the sheath due to processing at a high temperature and it is difficult to increase the fusion performance due to the general polyester in the core portion There is a problem.
The low-melting-point polyester fibers developed so far have been widely used as sheath-core type conjugated fibers in which general polyester is used for the core portion and low-melting point polyester fibers are used for the sheath portion. It is difficult to increase the fusion bonding performance at a low temperature due to the general polyester used in the polyester. In addition, since the complex spinning is required, the spinning processability is complicated and the physical properties of the fiber are deteriorated and the spinning and detaching mechanism becomes complicated, resulting in a high investment cost.
In order to solve the above-mentioned problems, it is an object of the present invention to provide a fiber having improved adhesion at a low temperature by not using a general polyester having a high melting point when producing a low melting point polyester fiber .
In order to accomplish the above object, the present invention relates to a low-melting-point polyester fiber and a method for producing the same.
Specifically, the present invention relates to an acidic component comprising 60 to 80 mol% of terephthalic acid or its derivative and 20 to 40 mol% of isophthalic acid or a derivative thereof
A fiber produced by polymerization with a diol component comprising ethylene glycol and diethylene glycol,
A degree of polymerization of 70 to 120, an elongation of 40 to 90%, and a shrinkage ratio at 80 DEG C of 40 to 80%.
The diol component may comprise from 60 to 99 mol% of ethylene glycol and from 1 to 40 mol% of diethylene glycol.
The reaction ratio of the acid component and the diol component may be 1: 1 to 1: 2.
The low melting point polyester fiber may have a melting point of 95 to 120 캜.
As a specific example of the method for producing a low melting point polyester fiber,
Which is obtained by polymerizing an acid component comprising 60 to 80 mol% of terephthalic acid or its derivative and 20 to 40 mol% of isophthalic acid or a derivative thereof and a diol component containing ethylene glycol and diethylene glycol and having a degree of polymerization of 70 to 120, 0.7, and a melting point of 95 to 120 ° C;
Spinning the low melting point polyester to a low melting point polyester fiber having a fineness of 2 to 6 mono denier;
Melting the low-melting-point polyester fiber at a stretching bath temperature of 50 to 70 占 폚 and a stretching ratio of 2.0 to 5.0, followed by drying at 50 to 60 占 폚; And
Cutting the low melting point polyester fiber to 5 to 100 mm;
But is not limited thereto.
The present invention can provide a low melting point polyester fiber and a method for producing the same.
The low melting point polyester fiber of the present invention can be produced by preparing single fibers spinning alone with only low melting point polyester to improve the disadvantages of the short fibers prepared from existing cis-core type conjugate spinning and to obtain low melting polyester Fiber can be provided. In addition, the short fibers made only of the low-melting-point polyester of the present invention have a high shrinkage percentage as compared with the short fibers prepared by the conventional cis-core type composite spinning. There is an advantage that can be made.
Hereinafter, the low melting point polyester fiber according to the present invention and a method for producing the same will be described in more detail. It should be understood, however, that the invention is not limited to the disclosed embodiments, but, on the contrary, is intended to cover various modifications and equivalent arrangements included within the spirit and scope of the invention.
Also, unless otherwise defined, all technical and scientific terms have the same meaning as commonly understood by one of ordinary skill in the art to which this invention belongs. The terminology used herein is for the purpose of describing particular embodiments only and is not intended to be limiting of the invention.
The present invention will be described in more detail.
The present invention relates to a fiber prepared by polymerizing an acid component comprising 60 to 80 mol% of terephthalic acid or a derivative thereof and 20 to 40 mol% of isophthalic acid or a derivative thereof and a diol component comprising ethylene glycol and diethylene glycol, To 120, an elongation of 40 to 90%, and a shrinkage ratio at 80 DEG C of 40 to 80%.
The low melting point polyester of the present invention is preferably a copolymerized low melting polyester which is prepared by adjusting the degree of polymerization so that radioactive and physical properties are not lowered by using isophthalic acid (IPA). The isophthalic acid is the most important factor for controlling the shrinkage ratio, and is preferably 20 to 40 mol% of the whole polymer, but is not limited thereto. The content of isophthalic acid controls the degree of crystallization, which makes it possible to produce a polyester resin having a shrinkage ratio of 40 to 80% at 80 ° C.
The low melting point polyester fiber of the present invention preferably has a shrinkage percentage of 40 to 80%, but is not limited thereto. The low melting point polyester fiber of the present invention has a high shrinkage percentage compared to the fiber prepared by the conventional cis-core type composite spinning, and can further improve the fusion bonding performance when mixed with other materials.
Also, the above-mentioned diethylene glycol (DEG) can lower the melting point of the polyester together with isophthalic acid, thereby lowering the crystallinity of the polyester in the polymerization process and lowering the melting point.
The copolymerized low melting point polyester may be prepared from a random copolymer and a block copolymer. The random copolymer is a copolymer in which monomers having different chemical structures are randomly linked to form a polymer chain, and the block copolymer is a copolymer in which two monomer units are alternately arranged along the main polymer chain. The block copolymer has an advantage in that the content of each compound to be polymerized can be arbitrarily controlled and the molecular weight and physical properties can be controlled more easily than the random copolymer. The low melting point polyester of the present invention can use both random copolymerized polyester and block copolymerized polyester, but is not limited thereto.
The reaction ratio of the acid component to the diol component is preferably 1: 1 to 1: 2, but is not limited thereto. The molar ratio of the acid component to the diol component, that is, the molar ratio of the acid component of terephthalic acid and isophthalic acid to the diol component of ethylene glycol and diethylene glycol is preferably 1: 1 to 1: 2, no. The molar ratio of the acid component to the diol component may be 1: 1 or more in view of improving the process efficiency of the polymerization reaction, and may be 1: 2 or less in the improvement of the physical properties of the produced polymer, but is not limited thereto. When the reaction is carried out at the reaction ratio within the above range, the polymerization reactivity is improved and sufficient esterification reaction proceeds to improve the degree of polymerization of the polymer.
The low melting point polyester polymerization degree (Pn) is preferably 70 to 120, but is not limited thereto. When the degree of polymerization is within the above range, the radioactivity improves and an appropriate melting point can be obtained. The elongation of the low melting point polyester fiber is preferably 40 to 90%, but is not limited thereto. In the case of elongation in the above range, it is possible to secure flexibility with high toughness, and excellent elongation and toughness and tear strength as compared with conventional polyester fibers can be secured.
As a specific example of the present invention, 0.01 to 0.05 part by weight of a catalyst is added to 100 parts by weight of the acid component and the diol component, and the temperature is gradually raised to 250 to 300 ° C. At this time, when the final pressure is in the range of 0.1 to 1.0 Torr, preferably 0.5 Torr, the polymerization is carried out so as to form a polymerized product while reducing the pressure, and the intrinsic viscosity is 0.40 to 0.70, Of the low melting point polyester is produced, but it is not limited thereto.
In the polymerization reaction of the present invention, antimony trioxide (Sb 2 O 3 ), titanium oxide and dibutyltin dilaurate may be used as a catalyst, but the present invention is not limited thereto. For example, antimony trioxide and tetrabutyl titanate are used as catalysts for increasing the reactivity of the copolymer components of the present invention and controlling the required viscosity.
Therefore, when the temperature, the pressure, and the catalyst content of the present invention are within the above ranges, polymerization of each reactant is smoothly performed, polymer formation is easy, and viscosity of the formed polymer can be controlled. In addition, the overall physical properties of the polymer thus formed are improved.
The polymerization reaction may be carried out by a conventional esterification reaction, but is not particularly limited. Specifically, for example, the step of polymerizing an ester reactant produced in an esterification reaction to polymerize a low-melting-point polyester is a step of polymerizing in a vacuum of 0.1 to 1 Torr or less at 250 to 300 ° C for 60 to 150 minutes. The polycondensation in the production of a general polyester is produced by polymerization for 3 hours or more, but the condensation polymerization of the present invention is controlled by polymerization for 60 to 150 minutes. If the condensation polymerization time is less than 60 minutes, the degree of polymerization may be lowered to less than 70, the yield may be lowered, and the radiation may be a problem. Conversely, if the polymerization time exceeds 150 minutes, the degree of polymerization may exceed 120, and radioactivity may be lowered due to lack of flowability of the polymer during spinning.
In the present invention, the diol component includes 60 to 99 mol% of ethylene glycol and 1 to 40 mol% of diethylene glycol.
The diol component preferably contains diethylene glycol in order to satisfy the softening temperature, adhesiveness, and processability of the polymer. In the present invention, when the content of diethylene glycol is within the above range, desired performance can be exhibited. The low melting point polyester fiber of the present invention is made of low melting point polyester by using diethylene glycol and has an effect of lowering the use of expensive isophthalic acid to increase the economical efficiency of the low melting point polyester fiber.
The low-melting-point polyester fiber of the present invention has excellent adhesion at a lower temperature than the sheath-core type polyester fiber containing a general polyester. In addition, when it is used as a binder in fabrics or fabrics, it can be processed at a lower temperature than the conventional sheath-core type polyester fibers, and the problem of deterioration of physical properties due to curing of the product can be solved.
In the production of the low-melting-point polyester fiber of the present invention, additives such as a flame retardant, a dye, a pigment, a wetting agent, a lubricant, an oxidation stabilizer, a quencher, and a coloring agent may be further included as needed. The content of the additive may suitably be included within a range that does not impair the physical properties of the low melting point polyester fiber of the present invention.
The present invention provides a process for producing a low melting point polyester fiber comprising the steps of:
In the method for producing a low melting point polyester fiber,
Which is obtained by polymerizing an acid component comprising 60 to 80 mol% of terephthalic acid or its derivative and 20 to 40 mol% of isophthalic acid or a derivative thereof and a diol component containing ethylene glycol and diethylene glycol and having a degree of polymerization of 70 to 120, 0.7, and a melting point of 95 to 120 ° C; And spinning, stretching and cutting the low melting point polyester.
Specifically, an acid component comprising 60 to 80 mol% of terephthalic acid or a derivative thereof and 20 to 40 mol% of isophthalic acid or a derivative thereof, and a diol component containing ethylene glycol and diethylene glycol and having a degree of polymerization of 70 to 120, Of from 0.4 to 0.7 and a melting point of from 95 to 120 캜; Spinning the low melting point polyester to a low melting point polyester fiber having a fineness of 2 to 6 mono denier; Melting the low-melting-point polyester fiber at a stretching bath temperature of 50 to 70 占 폚 and a stretching ratio of 2.0 to 5.0, followed by drying at 50 to 60 占 폚; And cutting the low-melting-point polyester fiber to 5 to 100 mm; .
The intrinsic viscosity (IV) of the terephthalic acid and isophthalic acid as the acid component and the low melting point polyester made of ethylene glycol and diethylene glycol as the diol component should be adjusted to 0.4 to 0.7. When the intrinsic viscosity is less than 0.4, the physical properties of the produced polyester are lowered and the heat resistance is lowered, which is difficult to use. If the intrinsic viscosity exceeds 0.7, the melting point is increased and the radioactivity may be lowered.
A spinning process of spinning the low melting point polyester fiber at a spinning speed of from 800 to 1300 m / min at 250 to 290 ° C, and a drawing process of drawing the spinning fiber at a temperature of 50 to 70 ° C in a cooling bath at a draw ratio of 2.0 to 5.0 Low melting point polyester fibers can be produced, but the present invention is not limited thereto. In the stretching in the above-mentioned range, the low-melting-point polyester fiber is not refracted, so that the stretching processability can be secured.
The low-melting-point polyester fiber preferably has a fineness of 2 to 6 mono-denier, but is not limited thereto.
In the present invention, the low melting point polyester fiber has a fineness of 2 to 6 mono denier. In the present invention, when the fineness is within the above range, a homogeneous fiber having a proper crimp number can be commercially produced.
After spinning, the fibers spun in cold air at 10 to 30 cm below the spinneret are cooled. The cold air temperature is preferably 15 to 30 ° C. If the temperature of the cold air is too low, the fibers may be refracted during the drawing process due to the rapid solidification of the spun fibers. If the temperature is too high, the cooling effect may be insignificant. The cooling process is performed at 0.01 to 10 seconds, and the cooling rate of the radiated fibers should be controlled by adjusting the temperature and time of the cooling air.
The drawing step is a step of imparting denseness and strength to the spun fibers. The general low-melting-point polyester fiber is stretched at a stretching temperature of 70 to 100 ° C. However, in order to prevent fusion, the low- It is preferable, but not limited, to stretch at 50 to 70 캜, which is a lower temperature of 20 to 50 캜.
The drying step is preferably a step of heat-treating the stretched low-melting-point polyester fiber by heat treatment to enhance the stability of the fiber, but the present invention is not limited thereto. When the heat treatment is performed, the heat treatment temperature should be appropriately controlled according to the melting point of the low melting point polyester to be used. When the low melting point polyester of the present invention having a melting point of 95 to 120 ° C is used, the heat treatment is preferably performed at 50 to 60 ° C , But is not limited thereto.
The low melting point polyester fiber of the present invention is preferably stretched to 2.0 to 5.0 in order to enhance adhesion and touch, and is preferably, but not limited to, to provide stretch stability so that the fiber is not cut.
The cutting step is a step of cutting the produced low-melting-point polyester fiber into short fibers, and the length of the short fibers is preferably 5 to 100 mm.
The low-melting-point polyester fiber produced in the present invention has a high fusion-bondability at low temperatures compared with a conventional sheath-core type low-melting-point polyester. Therefore, the present invention can be applied to automotive parts instead of the conventional cis-core type low melting point polyester fiber, polypropylene fiber and glass fiber, but is not limited thereto. In addition, low-melting polyester fibers can be produced by changing the spinning conditions using existing idle facilities, thereby enhancing production price competitiveness.
≪ Method for measuring physical properties &
(1) Measurement of mol% of copolymerizable components
The molar percentage of the copolymerization component added for the production of the low melting point polyester was determined by dissolving the copolymer in a trifluoroacetic acid solvent and using a proton nuclear magnetic resonance analyzer ( 1 H-NMR, model name: AVANCE-400) of Bruker Respectively.
(2) Strength and elongation measurement
The strength and elongation of the fiber were measured using an automatic tensile tester (Lenzing Instruments) at a speed of 2 cm / min and a grip distance of 2 cm.
(G / de) divided by the denier (de) (denier) is the strength, the value of the initial length as a percentage of the elongated length as a percentage (% ) Were defined as extension.
(3) Shrinkage
The sample was sufficiently left under the standard conditions of 20 ° C. and 65% relative humidity, and the weight (L 0) was measured with a weight corresponding to 165 mg / d. The sample was treated with a dry oven at 80 ° C. for 15 minutes, And after that, the length (L) was measured by applying a load corresponding to 0.05 g / d, and the shrinkage percentage was calculated by the following formula (1).
Equation 1
? S (%) = (L0 - L) / L0 100
(4) Melting point measurement
Were measured using a thermal mechanical analyzer (TA, Q400).
(5) Intrinsic Viscosity (IV)
The low melting point polyester was dissolved in a phenol / tetrachloroethane 60/40 weight ratio to make a 0.5 wt% solution, and the viscosity was measured at 30 캜 by a Ube load viscometer.
(6) Fineness measurement
The fineness of the fibers was measured using a fineness meter (Lenzing Instruments).
(7) Evaluation of adhesion
The prepared low melting point polyester fiber was mixed with the regenerated fiber, treated at 160 ° C for 5 minutes using a dry oven, taken out, and subjected to constant speed elongation at a rate of 10 cm / min using an automatic tensile tester (Shimadzu) The evaluation of the workability was carried out. The results were evaluated as?: Very excellent,?: Excellent,?: Fair, and X: poor.
[Example 1]
Preparation of Low Melting Point Polyester
70/30 mol% of terephthalic acid / isophthalic acid as an acid component and 70/30 mol% of ethylene glycol (EG) / diethylene glycol (DEG) as a diol component were reacted at a reaction ratio of acid component and diol component of 1: Esterification reaction was carried out under pressure to obtain an ester-formed product. The formed ester reactant was transferred to a condensation polymerization reactor and 0.02 part by weight of antimony trioxide and 0.005 part by weight of tetrabutyl titanate were added to 100 parts by weight of the ester reactant. At this time, the temperature was raised to 280 ° C while gradually reducing the pressure to 0.5 Torr, and the condensation polymerization was carried out for 70 minutes until the intrinsic viscosity became 0.565.
Preparation of low melting point polyester fiber
Using the low melting point polyester prepared as described above, it was discharged at 1750 g / min.pos through a spinneret having a number of holes of 2215, singled at a spinning rate of 270 m / min at a temperature of 270 ° C, Lt; RTI ID = 0.0 > 18 C. < / RTI > After stretching at a stretching ratio of 4.0 in a heating furnace at 60 캜 to obtain monodendric double-staple fibers, the stretched fibers were dried at 55 캜 to prepare low-melting polyester fibers having a filament length of 55 mm.
[Example 2]
60/40 mol% of terephthalic acid (TPA) / isophthalic acid (IPA) as an acid component and 65/35 mol% of ethylene glycol (EG) / diethylene glycol (DEG) as a diol component were reacted to give an intrinsic viscosity of 0.568 The procedure of Example 1 was repeated.
[Example 3]
(TPA) / isophthalic acid (IPA) as an acid component and 80/20 mol% of ethylene glycol (EG) / diethylene glycol (DEG) as a diol component and reacted to give an intrinsic viscosity of 0.567 The procedure of Example 1 was repeated.
[Example 4]
The same procedure as in Example 1 was carried out except that 70/30 mol% of terephthalic acid (TPA) / isophthalic acid (IPA) as an acid component and 100 mol% of ethylene glycol (EG) as a diol component were reacted so that the intrinsic viscosity was 0.566 Respectively.
[Comparative Example 1]
The low melting point polyester produced in the same manner as in Example 1 was used as a sheath component and the core component was stretched at a stretching ratio of 4.0 using a conventional polyethylene terephthalate chip having a melting point of 255 캜 to obtain a monodendearic 2 Staple fibers. After the drawn fibers were dried at 55 캜, a low melting point polyester fiber having a fiber length of 55 mm was prepared. The physical properties of the low melting point polyester and the fiber thus prepared are shown in Table 1 below.
(g / de)
(80 DEG C)
Core: 255
As shown in Table 1, in Comparative Example 1, the polyethylene terephthalate having a high melting point was included in the core portion, so that the shrinkability and elongation were low and the adhesion at low temperature was poor Able to know.
On the other hand, according to the present invention, a low-melting-point polyester fiber having a high shrinkage ratio and excellent adhesiveness at a low temperature can be obtained by preparing the low-melting-point polyester alone from the cis-core low melting point polyester fiber. Therefore, the present invention can be applied to automobile parts in place of conventional cis-core type low melting point polyester fibers, polypropylene fibers and glass fibers.
As described above, the low-melting-point polyester fiber and the method of manufacturing the same according to the present invention have been described in detail in order to facilitate an overall understanding of the present invention. However, And various modifications and changes may be made thereto by those skilled in the art to which the present invention pertains.
Accordingly, the spirit of the present invention should not be construed as being limited to the embodiments described, and all of the equivalents or equivalents of the claims, as well as the following claims, belong to the scope of the present invention .
Claims (8)
Melting polyester polymerized with a diol component comprising 65 to 80 mol% of ethylene glycol and 20 to 35 mol% of diethylene glycol,
Melting polyester fiber is drawn at a stretching bath temperature of 50 to 70 캜 at a draw ratio of 2.0 to 5.0 and then dried at 50 to 60 캜,
Melting point polyester fiber having a melting point of 95 to 120 占 폚, a degree of polymerization of 70 to 120, an elongation of 40 to 90% and a shrinkage ratio at 80 占 폚 of 40 to 80%.
Wherein the reaction ratio of the acid component to the diol component is 1: 1 to 1: 2.
An acidic component comprising 60 to 80 mol% of terephthalic acid or a derivative thereof and 20 to 40 mol% of isophthalic acid or a derivative thereof;
A diol component comprising from 65 to 80 mol% of ethylene glycol and from 20 to 35 mol% of diethylene glycol to produce a low melting polyester having a polymerization degree of 70 to 120, an intrinsic viscosity of 0.4 to 0.7 and a melting point of 95 to 120 DEG C step; And
Melting the polyester with the low melting point polyester and stretching the spinning low temperature polyester fiber at a stretching bath temperature of 50 to 70 占 폚 to a stretching ratio of 2.0 to 5.0 and then drying at 50 to 60 占 폚 and then cutting;
By weight based on the total weight of the low-melting-point polyester fiber.
Wherein the low-melting-point polyester is spun with a fineness of 2 to 6 mono-denier.
Wherein the low-melting-point polyester fiber is cut to 5 to 100 mm.
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| KR1020160018595A KR101766903B1 (en) | 2016-02-17 | 2016-02-17 | Low melting point polyester fiber and manufacturing method thereof |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110923843A (en) * | 2019-12-16 | 2020-03-27 | 扬州富威尔复合材料有限公司 | Polyester FDY hot-melt fiber and preparation method thereof |
| CN112760739A (en) * | 2020-12-31 | 2021-05-07 | 扬州富威尔复合材料有限公司 | Low-melting-point polyester fiber for automotive interior and preparation method thereof |
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2016
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110923843A (en) * | 2019-12-16 | 2020-03-27 | 扬州富威尔复合材料有限公司 | Polyester FDY hot-melt fiber and preparation method thereof |
| CN112760739A (en) * | 2020-12-31 | 2021-05-07 | 扬州富威尔复合材料有限公司 | Low-melting-point polyester fiber for automotive interior and preparation method thereof |
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