KR101524690B1 - Heat Melted Non-woven Fabric Produced with Low-oriented High-shrinkage Polyester Fibers and Method of Manufacturing Same - Google Patents
Heat Melted Non-woven Fabric Produced with Low-oriented High-shrinkage Polyester Fibers and Method of Manufacturing Same Download PDFInfo
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- KR101524690B1 KR101524690B1 KR1020140021844A KR20140021844A KR101524690B1 KR 101524690 B1 KR101524690 B1 KR 101524690B1 KR 1020140021844 A KR1020140021844 A KR 1020140021844A KR 20140021844 A KR20140021844 A KR 20140021844A KR 101524690 B1 KR101524690 B1 KR 101524690B1
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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
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- D—TEXTILES; PAPER
- D01—NATURAL OR MAN-MADE THREADS OR FIBRES; SPINNING
- D01G—PRELIMINARY TREATMENT OF FIBRES, e.g. FOR SPINNING
- D01G1/00—Severing continuous filaments or long fibres, e.g. stapling
- D01G1/02—Severing continuous filaments or long fibres, e.g. stapling to form staple fibres not delivered in strand form
- D01G1/04—Severing continuous filaments or long fibres, e.g. stapling to form staple fibres not delivered in strand form by cutting
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- D—TEXTILES; PAPER
- D04—BRAIDING; LACE-MAKING; KNITTING; TRIMMINGS; NON-WOVEN FABRICS
- D04H—MAKING TEXTILE FABRICS, e.g. FROM FIBRES OR FILAMENTARY MATERIAL; FABRICS MADE BY SUCH PROCESSES OR APPARATUS, e.g. FELTS, NON-WOVEN FABRICS; COTTON-WOOL; WADDING ; NON-WOVEN FABRICS FROM STAPLE FIBRES, FILAMENTS OR YARNS, BONDED WITH AT LEAST ONE WEB-LIKE MATERIAL DURING THEIR CONSOLIDATION
- D04H1/00—Non-woven fabrics formed wholly or mainly of staple fibres or like relatively short fibres
- D04H1/40—Non-woven fabrics formed wholly or mainly of staple fibres or like relatively short fibres from fleeces or layers composed of fibres without existing or potential cohesive properties
- D04H1/42—Non-woven fabrics formed wholly or mainly of staple fibres or like relatively short fibres from fleeces or layers composed of fibres without existing or potential cohesive properties characterised by the use of certain kinds of fibres insofar as this use has no preponderant influence on the consolidation of the fleece
- D04H1/4326—Condensation or reaction polymers
- D04H1/435—Polyesters
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- D—TEXTILES; PAPER
- D04—BRAIDING; LACE-MAKING; KNITTING; TRIMMINGS; NON-WOVEN FABRICS
- D04H—MAKING TEXTILE FABRICS, e.g. FROM FIBRES OR FILAMENTARY MATERIAL; FABRICS MADE BY SUCH PROCESSES OR APPARATUS, e.g. FELTS, NON-WOVEN FABRICS; COTTON-WOOL; WADDING ; NON-WOVEN FABRICS FROM STAPLE FIBRES, FILAMENTS OR YARNS, BONDED WITH AT LEAST ONE WEB-LIKE MATERIAL DURING THEIR CONSOLIDATION
- D04H1/00—Non-woven fabrics formed wholly or mainly of staple fibres or like relatively short fibres
- D04H1/40—Non-woven fabrics formed wholly or mainly of staple fibres or like relatively short fibres from fleeces or layers composed of fibres without existing or potential cohesive properties
- D04H1/54—Non-woven fabrics formed wholly or mainly of staple fibres or like relatively short fibres from fleeces or layers composed of fibres without existing or potential cohesive properties by welding together the fibres, e.g. by partially melting or dissolving
- D04H1/558—Non-woven fabrics formed wholly or mainly of staple fibres or like relatively short fibres from fleeces or layers composed of fibres without existing or potential cohesive properties by welding together the fibres, e.g. by partially melting or dissolving in combination with mechanical or physical treatments other than embossing
Abstract
The low-orientation high-definition PET staple fibers according to the present invention are produced by spinning a polyester polymer at a speed of 500 to 1,500 m / min, stretching the spinning non-drawn filament at a magnification of 0.9 to 2, inch crimp and cutting into a fiber length in the range of 22 to 120 mm, wherein the fiber elongation is 200 to 600%, the dry heat shrinkage at 160 DEG C is 20 to 70%, the fiber thickness is 2 to 15 It is characterized by being denier. The polyester polymer may further contain, as comonomer, 1 to 20 mol% of isophthalic acid (IPA) in an aromatic structure, diethylene glycol (DEG) in an aliphatic structure, or a mixture thereof. The heat-bonded nonwoven fabric using the low-orientation high-definition PET short fibers according to the present invention is obtained by opening a low-orientation high-definition PET short-fiber bail in a bail opening device, A step of supplying a short fiber, a step of shortly distributing the supplied short fibers to the carding machine, a step of forming a web of a predetermined size in the carding machine, a step of forming a web And a fusing step of fusing staple fibers passed through a high-temperature and high-pressure heat press to each other.
Description
The present invention relates to a thermally bonded nonwoven fabric. More specifically, the present invention relates to a thermally bonded nonwoven fabric made from a polyester (PET) short fiber of low orientation and high shininess and excellent in heat stability and shape stability.
Nonwoven fabrics are one of the textile materials which have been popular in various fields because they are easy to change appearance or thickness, have excellent shape stability, and have excellent physical properties required for industrial fibers such as heat insulation, absorbency and insulation. Nonwoven fabrics are used for various purposes such as packaging containers, automobile interior materials, air filters, building interior materials and the like.
Non-woven fabrics include resin felt, glass felt, and low melting polyester felt. Resin felts are heavy in weight, and when used as an automobile interior material, there is a problem of counteracting fuel efficiency reduction of an automobile and disposal treatment is problematic because a phenol resin which is a thermosetting resin is used. Glass felts are excellent in sound absorption properties and strong in strength, but their workability, which is a typical problem of glass fiber, is very poor and disposal treatment is also a problem. The low melting point polyester heat-bonding felt is problematic in terms of heat stability and form stability. In particular, the temperature inside the vehicle in a hot and humid climate in the summer or the tropics becomes very high. At this time, since the material is exposed to the atmosphere over the glass transition temperature for a long time, the heat resistance is insufficient due to the characteristics of the material. There is a problem that it is deformed.
The inventors of the present invention have found that when a nonwoven fabric is produced using a lowly oriented polyester material, the nonwoven fabric is heat-sealed by heat and compression of the short fibers, Performance nonwoven fabric having excellent heat resistance, heat resistance, heat resistance and heat resistance, and has excellent economical efficiency and excellent nonwoven fabric processability, heat stability and form stability.
An object of the present invention is to provide a thermally bonded nonwoven fabric having excellent heat stability and shape stability.
Another object of the present invention is to provide a thermally bonded nonwoven fabric which can be produced at a lower cost than conventional nonwoven fabrics by using low-orientation PET staple fibers.
Another object of the present invention is to provide a thermally bonded nonwoven fabric having a soft feel.
These and other objects of the present invention can be achieved by the present invention which is described in detail below.
The low-orientation high-definition PET staple fibers according to the present invention are produced by spinning a polyester polymer at a speed of 500 to 1,500 m / min, stretching the spinning non-drawn filament at a magnification of 0.9 to 2, inch crimp and cutting into a fiber filament in a range of 22 to 120 mm, and a breaking elongation of 200 to 600% and a dry heat shrinkage at 160 占 폚 of 160 占 폚 * 15 minutes of 20 to 70% , And a fiber thickness of 2 to 15 denier.
The polyester polymer may further contain, as comonomer, 1 to 20 mol% of isophthalic acid (IPA) in an aromatic structure, diethylene glycol (DEG) in an aliphatic structure, or a mixture thereof.
The heat-bonded nonwoven fabric using the low-orientation high-definition PET short fibers according to the present invention is obtained by opening a low-orientation high-definition PET short-fiber bail in a bail opening device, A step of supplying a short fiber, a step of shortly distributing the supplied short fibers to the carding machine, a step of forming a web of a predetermined size in the carding machine, a step of forming a web And a fusing step of passing the short fibers through a high-temperature and high-pressure heat press to fuse each other to each other.
The thermally bonded nonwoven fabric thus manufactured is subjected to a post-process that is suitable for use again. For example, when the thermally bonded nonwoven fabric is to be used as a building interior material, the thermally bonded nonwoven fabric is cut into a certain shape to produce a nonwoven panel for architectural interior materials. When the thermally bonded nonwoven fabric is used as an automobile interior nonwoven fabric, After passing through a heat press at a high temperature of 280 占 폚, a nonwoven fabric having excellent shape stability and heat resistance is produced by pressurizing with a certain type of mold at a high pressure. This nonwoven fabric is used for automobile headliner, bonnet hood, door trim, trunk, and the like. Air filter, the laminated web is passed through a high-pressure calender heated at 160 to 230 ° C and thermally adhered to a predetermined thickness to produce an air filter nonwoven fabric having a weight of 50 to 200 g / m 2 .
DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS Reference will now be made in detail to the preferred embodiments of the present invention, examples of which are illustrated in the accompanying drawings.
The present invention provides a thermally bonded nonwoven fabric which is excellent in heat stability and form stability and can be produced at a lower cost than conventional nonwoven fabrics by using low-orientation high-aspect PET staple fibers, and also provides a heat- It has the effect of providing the fiber.
1 is a photomicrograph of a low-orientation high-definition PET staple fiber according to the present invention taken so that fusion phenomenon can be observed according to temperature.
FIG. 2 is a microphotograph of a conventional low-melting-point polyester conjugate fiber, a low-orientation high-density PET staple fiber of the present invention, and a staple fiber mixed therewith so as to observe the surface phenomenon after thermal bonding.
BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a thermally bonded nonwoven fabric, and relates to a thermally bonded nonwoven fabric made of polyester (PET) short fibers having a low orientation and high shininess and excellent in heat stability and shape stability.
The low-orientation high-definition PET staple fibers according to the present invention are produced by spinning a polyester polymer at a speed of 500 to 1,500 m / min, stretching the spinning non-drawn filament at a magnification of 0.9 to 2, inch crimp and cutting into a fiber length in the range of 22 to 120 mm, wherein the fiber elongation is 200 to 600%, the dry heat shrinkage at 160 DEG C is 20 to 70%, the fiber thickness is 2 to 15 It is characterized by being denier.
The low-orientation high-definition PET short fibers of the present invention and the heat-bonded nonwoven fabric produced therefrom are environmentally friendly, inexpensive, and excellent in heat stability and shape stability as well as nonwoven processability. Therefore, the nonwoven fabric of the present invention can be used for many applications such as packaging containers, automobile interior materials, air filters, nonwoven panels for building interior materials and the like.
If the fineness of the polyester short fibers is less than 2 deniers, the manufacturing cost is increased. If the denier of the polyester short fibers is more than 10 deniers, the number of constituent fibers of the heat adhesive fibers per unit area of the nonwoven fabric decreases.
The polyester polymer may further contain, as comonomer, 1 to 20 mol% of isophthalic acid (IPA) in an aromatic structure, diethylene glycol (DEG) in an aliphatic structure, or a mixture thereof.
In order to lower the melting point of the low-orientation high-density thermosetting fiber of the present invention and to improve the heat-bonding performance, when the polyethylene terephthalate is polymerized with terephthalic acid and ethylene glycol, an aromatic structure IPA (isophthalic acid), an aliphatic DEG Diethylene glycol), 1 to 20 mol% of a mixture thereof, and reacting the copolymerized polyester. This changes the crystallization rate and molecular orientation by copolymerizing the molecular chains, so that not only the melting point but also the softening temperature is lowered. There was no significant difference in the change of the melting point depending on the difference of the two comonomers, but the softening point was relatively lower when the flexible DEG was added.
The heat-bonded nonwoven fabric using the low-orientation high-definition PET short fibers according to the present invention is obtained by opening a low-orientation high-definition PET short-fiber bail in a bail opening device, A step of supplying a short fiber, a step of shortly distributing the supplied short fibers to the carding machine, a step of forming a web of a predetermined size in the carding machine, a step of forming a web And a fusing step of fusing staple fibers passed through a high-temperature and high-pressure heat press to each other.
The thermally bonded nonwoven fabric thus manufactured is subjected to a post-process that is suitable for use again. For example, when the thermally bonded nonwoven fabric is to be used as a building interior material, the thermally bonded nonwoven fabric is cut into a certain shape to produce a nonwoven panel for architectural interior materials. When the thermally bonded nonwoven fabric is used as an automobile interior nonwoven fabric, After passing through a heat press at a high temperature of 280 占 폚, a nonwoven fabric having excellent shape stability and heat resistance is produced by pressurizing with a certain type of mold at a high pressure. When the temperature applied to form the heat-setting nonwoven fabric is less than 180 ° C, the fibers in the nonwoven fabric are not properly thermally fused, and when the temperature is 260 ° C or more, thermal deformation may occur. If the heat application time is less than 60 seconds, the fibers are not sufficiently thermally fused. If the heat application time exceeds 420 seconds, not only thermal deformation but also unnecessary heat is used, resulting in waste of energy. The heat-sealed nonwoven fabric is cooled and cut to a predetermined size by a cutter to produce nonwoven panels for construction and automobile interior materials. This nonwoven fabric is used for automobile headliner, bonnet hood, door trim, trunk, and the like.
Air filter, the laminated web is passed through a high-pressure calender heated at 160 to 230 ° C and thermally adhered to a predetermined thickness to produce an air filter nonwoven fabric having a weight of 50 to 200 g / m 2 .
The method may further include forming a nonwoven fabric by spraying a flame retardant on the selectively heat-bonded nonwoven fabric, and drying the nonwoven fabric to form a flame retardant nonwoven fabric panel.
The nonwoven fabric panel manufactured as described above is excellent in practicality because it has heat insulating property, sound absorbing property, soundproofing property, ease of installation, lightweight property, aesthetic property, flame resistance and the like, and the material is made of polyester only and is easily recycled.
Hereinafter, preferred embodiments of the present invention will be described. However, the following examples are intended to illustrate the present invention and should not be construed as limiting or limiting the scope of protection of the present invention.
Example
Low orientation Thermal bonding Textile Manufacturing
Recently, low melting point polyesters, which are widely used as eco-friendly heat-bonding materials, have problems in terms of heat stability and shape stability, which cause deformation or sagging in an atmosphere of 100 ° C or higher temperature after forming the nonwoven fabric. To solve these problems, low heat-resistant thermosetting fibers having high heat resistance were prepared
Example 1
A thermo-adhesive staple fiber characterized by low-orientation high-degree of shrinkage was obtained by polymerizing terephthalic acid and ethylene glycol and spinning with a spinneret diameter of 0.3 mm, a length of 0.5 mm, an 1800 hole nozzle at a spinning speed of 1000 m / Was subjected to a step of stretching at a stretching ratio of about 0.9 to 1.2 in a stretching step after the production, to give a mechanical crimp to produce a fiber. PET staple fibers having an elongation at break of 450 to 550%, a dry heat shrinkage at 160 ° C of 30 to 40%, a fiber thickness of 4 to 6 denier and a fiber length of 51 to 70 mm are produced.
Manufacture of copolymer with low melting point
Example 2
In order to lower the melting point of the low-orientation heat-and-adhesive fiber and improve the heat-bonding performance, when the polyethylene terephthalate is polymerized with terephthalic acid and ethylene glycol, the copolymer is reacted with 4 mol% of IPA (isophthalic acid) After manufacture, staple fibers were prepared in the same manner as in Example 1. By copolymerizing the molecular chains, the crystallization rate and the molecular orientation are changed to lower the softening temperature as well as the melting point.
Example 3
When polyethylene terephthalate is polymerized with terephthalic acid and ethylene glycol, 4 mol% of DEG (diethylene glycol) is added so as to react with the aliphatic structure, and the copolymer is reacted to prepare a short fiber in the same manner as in Example 1.
Example 4
When polyethylene terephthalate is polymerized with terephthalic acid and ethylene glycol, the copolymer is reacted by adding IPA (isophthalic acid) having an aromatic structure in an amount of 10 mol% to prepare a copolymer, and then short fibers are produced in the same manner as in Example 1.
Example 5
When polyethylene terephthalate is polymerized with terephthalic acid and ethylene glycol, DEG (diethylene glycol) of aliphatic structure is added in an amount of 10 mol%, and the copolymer is reacted to prepare a short fiber in the same manner as in Example 1.
Comparative Example 1
A low melting point polyester is applied to a sheath portion and a general polyester is applied to a core portion so that the composite fiber is prepared and then stretched at a stretching ratio of 3 to 3.5 to give a mechanical crimp to the conventional low melting point poly Ester thermally bonded short staple fibers.
Comparative Example 2
A single fiber was prepared by spinning a general polyester and then stretched at a draw ratio of 3.5 to 4 to give a mechanical crimp to produce PET staple fibers.
[Table 1]
The properties of the nonwoven fabric according to Example 1-5 and Comparative Example 1-2 were measured by the following methods.
Melting point and glass transition temperature were measured by using a thermal differential scanning calorimeter (Perkin Elmer) at a rate of 20 ° C / min. The thermal behavior of the polymer was measured using DSC and DTA to determine the melting point and glass transition temperature.
Measurement of adhesion strength: The heat-sealed nonwoven fabric was fixed at a density of 200 g / m 2 and a thickness of 2 mm and measured and evaluated in a high temperature atmosphere at 120 캜 (dry heat) by ASTM D1424 (Test Method for Tearing Strength of fabrics).
As shown in Table 1, the composite fibers and nonwoven fabric prepared in Example 1-5 had better heat bonding strength in the high-temperature atmosphere than the low-melting-point conjugated fiber and the drawn fiber prepared in Comparative Example 1-2 . In particular, the nonwoven fabric of the general drawn yarn produced in Comparative Example 2 hardly undergoes thermal bonding at a drying treatment temperature of 230 ° C. In Example 1-5, thermal adhesion occurred at 180 to 200 ° C. In the present invention, various nonwoven fabrics having excellent heat-bonding performance by heating and pressing the low-orientation staple fibers can be produced.
FIG. 1 is a micrograph of a low-orientation high-definition PET staple fiber according to the present invention taken to observe the fusing phenomenon according to temperature, FIG. 2 is a photograph of a conventional low melting point polyester conjugate fiber, a low- A short fiber, and a short fiber mixed therewith, so that the surface phenomenon can be seen after heat bonding. It can be seen that the low-orientation high-definition PET staple fibers according to the present invention exhibit favorable fusion at 190 ° C, and that the fusion is superior to the conventional low melting point polyester conjugated fibers.
When polymerized polyethylene terephthalate with terephthalic acid and ethylene glycol, copolymerized polyester fibers obtained by reacting aromatic poly (isophthalic acid) and DEG (diethylene glycol) with aliphatic structure are reacted to copolymerize the molecular chains to increase the crystallization rate and molecular orientation The softening temperature as well as the melting point is lowered. There was no significant difference in the change of melting point according to the difference of the two comonomers, but the addition of soft DEG was relatively lower at the softening point.
It will be understood by those skilled in the art that various changes in form and details may be made therein without departing from the spirit and scope of the invention as defined by the appended claims.
Claims (6)
Stretching the spinning non-drawn yarn at a magnification of 0.9 to 2;
Forming 5 to 20 crimps on the stretched fibers; And
Cutting with a fiber length in the range of 22 to 120 mm;
Step,
Wherein the fiber elongation at break is 200 to 600%, the dry heat shrinkage at 160 DEG C is 20 to 70%, and the fiber thickness is 2 to 15 denier.
A short fiber mixing step of uniformly distributing the supplied short fibers to the carding machine;
A web forming step of forming a web of a predetermined size in the carding machine with the mixed short fibers;
A web laminating step of laminating the web in multiple layers; And
A fusing step of fusing staple fibers passed through a high-temperature and high-pressure heat press;
Wherein the thermally bonded nonwoven fabric is made of a thermosetting resin.
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| KR1020140021844A KR101524690B1 (en) | 2014-02-25 | 2014-02-25 | Heat Melted Non-woven Fabric Produced with Low-oriented High-shrinkage Polyester Fibers and Method of Manufacturing Same |
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| Application Number | Priority Date | Filing Date | Title |
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| KR1020140021844A KR101524690B1 (en) | 2014-02-25 | 2014-02-25 | Heat Melted Non-woven Fabric Produced with Low-oriented High-shrinkage Polyester Fibers and Method of Manufacturing Same |
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| KR101524690B1 true KR101524690B1 (en) | 2015-06-02 |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| KR101715712B1 (en) | 2016-09-23 | 2017-03-22 | 길한산업 주식회사 | Method for manufacturing of polyester staple fiber and non-woven using thereof |
Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH09217241A (en) * | 1995-12-04 | 1997-08-19 | Nippon Ester Co Ltd | Production of heat-self elongation-type polyester staple fiber |
| JPH10183439A (en) * | 1996-12-24 | 1998-07-14 | Nippon Ester Co Ltd | Production of thermally extensive polyester staple fiber |
| KR20010063604A (en) * | 1999-12-23 | 2001-07-09 | 조민호 | Polyester staple fiber to be used in the preparation of non-woven fabric for shoes and non-woven fabric |
| KR20110117957A (en) * | 2010-04-22 | 2011-10-28 | 웅진케미칼 주식회사 | The latent crimped polyester staple fiber and method thereof |
-
2014
- 2014-02-25 KR KR1020140021844A patent/KR101524690B1/en active IP Right Grant
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH09217241A (en) * | 1995-12-04 | 1997-08-19 | Nippon Ester Co Ltd | Production of heat-self elongation-type polyester staple fiber |
| JPH10183439A (en) * | 1996-12-24 | 1998-07-14 | Nippon Ester Co Ltd | Production of thermally extensive polyester staple fiber |
| KR20010063604A (en) * | 1999-12-23 | 2001-07-09 | 조민호 | Polyester staple fiber to be used in the preparation of non-woven fabric for shoes and non-woven fabric |
| KR20110117957A (en) * | 2010-04-22 | 2011-10-28 | 웅진케미칼 주식회사 | The latent crimped polyester staple fiber and method thereof |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| KR101715712B1 (en) | 2016-09-23 | 2017-03-22 | 길한산업 주식회사 | Method for manufacturing of polyester staple fiber and non-woven using thereof |
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