WO2000060147A1 - Synthetic fibres with fibrils - Google Patents
Synthetic fibres with fibrils Download PDFInfo
- Publication number
- WO2000060147A1 WO2000060147A1 PCT/NL2000/000230 NL0000230W WO0060147A1 WO 2000060147 A1 WO2000060147 A1 WO 2000060147A1 NL 0000230 W NL0000230 W NL 0000230W WO 0060147 A1 WO0060147 A1 WO 0060147A1
- Authority
- WO
- WIPO (PCT)
- Prior art keywords
- polymer
- fibrils
- main stem
- synthetic
- fibre
- Prior art date
Links
Classifications
-
- 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
Definitions
- the present invention relates to a method and a nozzle for manufacturing synthetic fibres.
- the invention further relates to synthetic fibres.
- Synthetic fibres are used in for instance the textile industry to make articles of clothing.
- a synthetic fibre is generally spun such that a fibre structure is obtained with a smooth surface.
- Such smooth synthetic fibres have the drawback however that when they are used in for instance articles of clothing they give visibly and tangibly unsatisfactory results. The wearer comfort of clothing manufactured from such synthetic fibres is thus not very great, and the garments look "synthetic".
- the object of the present invention is to resolve the above stated drawback.
- Synthetic fibres with so-called fibrils are obtained with the method according to the present invention. Making use of synthetic fibres with fibrils according to the invention results in a "woollier" feel when garments are worn which are manufactured from the synthetic fibre according to the invention. Garments manufactured from synthetic fibres according to the invention moreover have a less synthetic appearance.
- An additional advantage of the method according to the invention is that, compared to conventional smooth synthetic fibres, synthetic fibres manufactured with the method according to the invention have a greater insulating capacity and result in a greater density of materials manufactured from the synthetic fibres due to the many contact points between the synthetic fibres with fibrils and greater air layers between the synthetic fibres. With thermal connection of different synthetic fibres a stronger material is obtained due to the large number of contact points.
- the synthetic fibres manufactured with the method according to the invention moreover have a higher absorption capacity than smooth synthetic fibres.
- the surface area of the synthetic fibre is enlarged by the fibrils, whereby a better moisture absorption can be realized.
- the moisture can also be relinquished easily due to the large surface area.
- the synthetic fibres manufactured with the method according to the invention further have a better filtering action when they are used for the manufacture of filters, for instance for air and/or water. Owing to the high sound- insulating action of the synthetic fibres according to the invention, comparable to natural fibres such as cotton, they can further also be used in advantageous manner in the acoustic industry.
- synthetic fibres can be manufactured with the method according to the invention wherein the main stem of the synthetic fibre is manufactured from a first polymer or polymer mixture and the fibrils are manufactured from a second polymer or polymer mixture.
- Synthetic fibres can thus be produced wherein the main stem and the fibrils consist of different polymers or polymer mixtures.
- the advantages of a first polymer can be combined with the advantages of a second polymer in one synthetic fibre.
- Polymers or polymer mixtures with different melting points can for instance be used.
- the polymer is preferably chosen from the group consisting of polyamide (PA) , polyester (PES) or polypropylene (PP) , or a mixture thereof.
- PA polyamide
- PET polyester
- PP polypropylene
- Such polymers are particularly suitable for use in for instance textiles, filters and the automobile industry.
- the invention further relates to a nozzle for manufacturing synthetic fibres with one or more fibrils, which is provided with a passage for forming a main stem of the synthetic fibre which extends from an inlet of the nozzle to an outlet, and at least one filling space which is connected to at least one moulding chamber for forming the fibrils, wherein the moulding chamber debouches in the passage for forming the main stem.
- Synthetic fibres with fibrils having the stated advantages can be obtained in simple manner in one step with the nozzle according to the invention.
- Fibrils are created by causing the polymer material to flow at a greater speed through the passage for the main stem than in the filling space and moulding chambers.
- the placing of an intermittent pressure on the filling space results in an interruption in the supply flow of polymer material in the moulding chamber and fibrils of varying length are created.
- the filling space of the nozzle is a space arranged concentrically round the passage for the main stem. In this manner sufficient material is fed via the filling space to the moulding chambers to form fibrils.
- the moulding chamber can debouch at any desired angle in the passage for the main stem.
- the moulding chamber for forming of the fibrils advantageously debouches in the passage for the main stem at an angle of between 0 and 45°, wherein the angle relates to the angle formed between the main stem and the moulding chamber.
- synthetic fibres with fibrils protruding in differing measure can be manufactured by varying this angle.
- the filling space is preferably connected to a discharge channel for excess polymer or polymer mixture.
- a discharge channel for excess polymer or polymer mixture.
- the present invention finally also relates to a synthetic fibre comprising a main stem of at least one polymer or polymer mixture, and one or more fibrils of at least one polymer or polymer mixture protruding from the main stem.
- the arranged fibrils can have any desired shape and dimensions.
- the fibrils have the shape of for instance a fish-scale or ear of corn. Such fibrils can be arranged in simple manner and give satisfactory effects.
- the main stem of the synthetic fibre is preferably manufactured from a first polymer or polymer mixture and the fibrils are manufactured from a second polymer or polymer mixture so that, as already stated, the advantages of a first polymer can be combined with the advantages of a second polymer in one synthetic fibre.
- the synthetic fibre according to the invention can be manufactured from any suitable polymer or polymer mixture.
- the synthetic fibre according to the invention preferably consists of a polymer chosen from the group consisting of polyamide, polyester or polypropylene, or a mixture thereof.
- the synthetic fibres according to the present invention can be manufactured into any suitable type of fibre. Depending on the final application of the synthetic fibres, hollow synthetic fibres or solid synthetic fibres can for instance be manufactured.
- the fibres are preferably manufactured as solid fibres or bicomponent fibres.
- the synthetic fibres with fibrils according to the invention can be used in advantageous manner for manufacturing products comprising one or more synthetic fibres according to the invention.
- the fibres can suitably be used to manufacture for instance woven materials, knits or mats, or be processed in other appropriate manner. Such woven materials and mats can then be used to manufacture diverse products, such as for instance articles of clothing, or to manufacture filters.
- Such products comprising synthetic fibres according to the invention also form part of the present invention.
- Fig. 1 shows a synthetic fibre with fibrils according to the invention, wherein different forms of fibril are shown;
- Fig. 2 shows the contact points between different synthetic fibres according to the invention
- Fig. 3 shows the use of the synthetic fibre in a woven material
- Fig. 4 shows a preferred embodiment of a nozzle according to the invention.
- Figure 1 shows schematically synthetic fibres according to the invention.
- Synthetic fibres 1 consist of a main stem 2 with fibrils 3 which protrude from the main stem.
- Fibrils 2 can have different shapes.
- synthetic fibres By manufacturing the synthetic fibres while they are rotated synthetic fibres are for instance obtained with a main stem 2 and fibrils 3 which extend around the main stem.
- Figure 3 shows a woven material manufactured with the synthetic fibres 1 according to the invention. Owing to the fibrils the woven material has a "woollier" appearance than if the woven material were to consist of the smooth conventional synthetic fibre.
- FIG. 4 shows schematically a preferred embodiment of a nozzle 5 according to the invention.
- Nozzle 5 herein comprises a passage for forming a main stem of synthetic fibre 6 which extends from an inlet 7 of nozzle 7 to an outlet 8, and a filling space 9 which is arranged concentrically round the passage for the main stem and which is connected to a number of moulding chambers 10 for forming of the fibrils. Moulding chambers 10 debouch in the passage for the forming of main stem 6 at an angle of about 45°. Filling space 9 is connected to a discharge channel 11 for excess polymer or polymer mixture. Different shapes and dimensions of the fibrils 3 can be obtained in simple manner with nozzle 5 by varying the dimensions of moulding chambers 10 and the angle at which moulding chambers 10 debouch in the passage for main stem 6.
- Incorporated into a continuous fibre manufacturing process was a nozzle with a passage for the main stem with a diameter (D H ) of 0.5 mm.
- the moulding chambers debouching into the passage for the main stem had a narrowing of 0.1 mm.
- the injection conditions were as follows: Air injection: 5 bar.
- the main stem was manufactured from polypropylene (PP) and the fibrils from polyester (PE) .
- the temperature in the nozzle was 150°C and cooling took place to 80°C.
- the pressure in the passage for the main stem was 150 bar, the pressure in the moulding chambers for the fibrils was 100 bar, intermittent.
- Table 1 shows the results.
- a nozzle according to the invention with a passage for the main stem with a diameter of 0.2 mm.
- the moulding chambers for the fibrils had a narrowing of 0.05 mm.
- the pressure difference between the main flow and the flow through the passages of smaller diameter was 50 bar.
- the pressure of the side flow was changed intermittently. Cooling with air took place immediately after outflow.
- the moulding chambers were situated on the nozzle at 2 mm distance from each other in a pattern such that they did not interfere with each other during injection.
- filters manufactured from the synthetic fibres according to the invention were compared with filters of conventional smooth synthetic fibres. Air (5 g/1) saturated with microfibres was blown through the filters.
- Fibres of 20 mm length and with a cross-section of 0.2 mm 2 were used for the filters.
- the fibrils of the synthetic fibre according to the invention were 2 mm long. Tests were carried out with a lower weight per area of the synthetic fibre according to the invention. The results are shown in tables 2 and 3.
- EXAMPLE 3 A spun fibre of PES with gated fibrils of PP was mixed with cotton fibres.
- the PES fibres had a length of 30-60 mm and 10-15 denier.
- the injected fibrils had a length of 1-5 mm and 5-10 denier.
- the cotton fibres had a length of 10-15 mm.
- the mixing ratio was 30% fibre according to the invention and 70% cotton fibre.
- a mat was manufactured from the mixture by aerodynamic laying of fibres. By applying heat a connection was arranged between the melt fibres and the other fibres.
- the PP fibrils provide a good adhesion between the cotton fibres and the synthetic fibres.
- the specific properties of the mat were: weight: 1200 g/m 2 thickness: 24 mm density: 50 kg/m 3
- the synthetic fibres according to the invention provide a higher resilience and a lower specific weight.
- the new synthetic fibres are hereby very suitable for the acoustic industry, in all matrix structures, in particular in the automobile industry.
- a fibre is for instance injected from a polyamide stem and PES fibrils. (PA stem: 30-60 mm; 10-15 denier; PES fibrils: 1-5 mm; 2-8 denier) .
- the fibre is processed in a conventional production process to a usable textile fibre and used for instance as basis for a carpet in an automobile.
Landscapes
- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Textile Engineering (AREA)
- Nonwoven Fabrics (AREA)
Abstract
Description
Claims
Priority Applications (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
EP00917497A EP1171654A1 (en) | 1999-04-07 | 2000-04-07 | Synthetic fibres with fibrils |
AU38457/00A AU3845700A (en) | 1999-04-07 | 2000-04-07 | Synthetic fibres with fibrils |
Applications Claiming Priority (4)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
NL1011747 | 1999-04-07 | ||
NL1011747 | 1999-04-07 | ||
NL1012613 | 1999-07-16 | ||
NL1012613A NL1012613C2 (en) | 1999-04-07 | 1999-07-16 | Synthetic fibers with fibrils. |
Publications (1)
Publication Number | Publication Date |
---|---|
WO2000060147A1 true WO2000060147A1 (en) | 2000-10-12 |
Family
ID=26642954
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
PCT/NL2000/000230 WO2000060147A1 (en) | 1999-04-07 | 2000-04-07 | Synthetic fibres with fibrils |
Country Status (4)
Country | Link |
---|---|
EP (1) | EP1171654A1 (en) |
AU (1) | AU3845700A (en) |
NL (1) | NL1012613C2 (en) |
WO (1) | WO2000060147A1 (en) |
Citations (4)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US2034008A (en) * | 1929-09-05 | 1936-03-17 | Celanese Corp | Artificial filament, yarn, or thread |
US3280847A (en) * | 1961-09-19 | 1966-10-25 | Dow Chemical Co | Extrusion die |
US3928519A (en) * | 1972-07-29 | 1975-12-23 | Furukawa Electric Co Ltd | Method for forming on an elongated core member a covering of thermoplastic material by extrusion |
JPH08218220A (en) * | 1995-02-15 | 1996-08-27 | Kuraray Co Ltd | Thick fiber suitable for reinforcing |
-
1999
- 1999-07-16 NL NL1012613A patent/NL1012613C2/en not_active IP Right Cessation
-
2000
- 2000-04-07 WO PCT/NL2000/000230 patent/WO2000060147A1/en not_active Application Discontinuation
- 2000-04-07 EP EP00917497A patent/EP1171654A1/en not_active Withdrawn
- 2000-04-07 AU AU38457/00A patent/AU3845700A/en not_active Abandoned
Patent Citations (4)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US2034008A (en) * | 1929-09-05 | 1936-03-17 | Celanese Corp | Artificial filament, yarn, or thread |
US3280847A (en) * | 1961-09-19 | 1966-10-25 | Dow Chemical Co | Extrusion die |
US3928519A (en) * | 1972-07-29 | 1975-12-23 | Furukawa Electric Co Ltd | Method for forming on an elongated core member a covering of thermoplastic material by extrusion |
JPH08218220A (en) * | 1995-02-15 | 1996-08-27 | Kuraray Co Ltd | Thick fiber suitable for reinforcing |
Non-Patent Citations (1)
Title |
---|
PATENT ABSTRACTS OF JAPAN vol. 1996, no. - 26 December 1996 (1996-12-26) * |
Also Published As
Publication number | Publication date |
---|---|
AU3845700A (en) | 2000-10-23 |
EP1171654A1 (en) | 2002-01-16 |
NL1012613C2 (en) | 2000-10-10 |
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