AU2005233341B2 - Polypropylene monofilaments with improved properties - Google Patents
Polypropylene monofilaments with improved properties Download PDFInfo
- Publication number
- AU2005233341B2 AU2005233341B2 AU2005233341A AU2005233341A AU2005233341B2 AU 2005233341 B2 AU2005233341 B2 AU 2005233341B2 AU 2005233341 A AU2005233341 A AU 2005233341A AU 2005233341 A AU2005233341 A AU 2005233341A AU 2005233341 B2 AU2005233341 B2 AU 2005233341B2
- Authority
- AU
- Australia
- Prior art keywords
- monofilament
- polypropylene
- monofilaments
- examples
- abrasion
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Ceased
Links
Classifications
-
- 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
- D01F6/02—Monocomponent artificial filaments or the like of synthetic polymers; Manufacture thereof from homopolymers obtained by reactions only involving carbon-to-carbon unsaturated bonds
- D01F6/04—Monocomponent artificial filaments or the like of synthetic polymers; Manufacture thereof from homopolymers obtained by reactions only involving carbon-to-carbon unsaturated bonds from polyolefins
- D01F6/06—Monocomponent artificial filaments or the like of synthetic polymers; Manufacture thereof from homopolymers obtained by reactions only involving carbon-to-carbon unsaturated bonds from polyolefins from polypropylene
-
- 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
- D01F6/44—Monocomponent artificial filaments or the like of synthetic polymers; Manufacture thereof from mixtures of polymers obtained by reactions only involving carbon-to-carbon unsaturated bonds as major constituent with other polymers or low-molecular-weight compounds
- D01F6/46—Monocomponent artificial filaments or the like of synthetic polymers; Manufacture thereof from mixtures of polymers obtained by reactions only involving carbon-to-carbon unsaturated bonds as major constituent with other polymers or low-molecular-weight compounds of polyolefins
-
- 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
- D10B2321/00—Fibres made from polymers obtained by reactions only involving carbon-to-carbon unsaturated bonds
- D10B2321/02—Fibres made from polymers obtained by reactions only involving carbon-to-carbon unsaturated bonds polyolefins
- D10B2321/022—Fibres made from polymers obtained by reactions only involving carbon-to-carbon unsaturated bonds polyolefins polypropylene
-
- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
- Y10T—TECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION
- Y10T428/00—Stock material or miscellaneous articles
- Y10T428/29—Coated or structually defined flake, particle, cell, strand, strand portion, rod, filament, macroscopic fiber or mass thereof
- Y10T428/2913—Rod, strand, filament or fiber
Landscapes
- Chemical & Material Sciences (AREA)
- Chemical Kinetics & Catalysis (AREA)
- General Chemical & Material Sciences (AREA)
- Engineering & Computer Science (AREA)
- Textile Engineering (AREA)
- Artificial Filaments (AREA)
- Woven Fabrics (AREA)
Description
1 00 POLYPROPYLENE-BASED MONOFILAMENTS WITH IMPROVED PROPERTIES Field of the Invention The invention relates to polypropylene-based monofilaments having improved properties, especially an improved abrasion resistance, to a process for manufacturing these monofilaments and to their use. The invention relates more particularly to polypropylenebased monofilaments obtained from a polypropylene having a melt flow index (MFI) at 230'C/2.16 kg of less than or equal to 1.9 g/10 min.
Background of the Invention Any discussion of the prior art throughout the specification should in no way be considered as an admission that such prior art is widely known or forms part of common general knowledge in the field.
It is an object of the present invention to overcome or ameliorate at least one of the disadvantages of the prior art, or to provide a useful alternative.
Two-dimensional textile articles made of polypropylene are of great interest as chemically and mechanically resistant filtration means for filtration in the chemical, pharmaceutical and food industries.
Monofilaments made of pure polypropylene have the drawback of forming a great deal of dust as a result of the low resistance of this substance to abrasion during the weaving process. The problem of abrasion is also known in the case of other thermoplastics. Thus 784 107 mentions melt-spun, polyamide, polyester or polypropylene monofilaments that are intended for paper machine forming fabrics and for strimmer lines. According to the above patent, abrasion-resistant monofilaments are obtained using to 99% by weight of fibre-forming polymer and 1 to by weight of a maleic-anhydride-modified polyethylene/ 2 O polypropylene rubber and other additives. However, the 0 examples are limited, as regards the fibre-forming Cq polymer, to the polyamide nylon-6 and to polyethylene Sterephthalate, and also to a PA-6,6/PA-6 copolyamide.
5 The spinning rates are not mentioned.
A process for manufacturing polypropylene multifilaments intended for textile applications is also known from EP-A-1 059 370. As starting material, an isotactic polypropylene catalysed by a metallocene is used that C1 has a melt flow index greater than 19 g per 10 minutes.
SFOY (Fully Oriented Yarn) multifilaments of 10 dpf C- (denier per filament) [0.03953 mm diameter] and POY (Partially Oriented Yarn) multifilaments of 2 dpf (denier per fibre) [0.01768 mm diameter] have been described. As regards the yarns manufactured, only general indications are given. Monofilaments are not described.
Applications WO 02/086207 and WO 03/048434 describe polypropylene monofilaments, the polypropylene including additives. The polypropylene employed for manufacturing the monofilaments has a melt flow index of greater than or equal to 6 g per 10 minutes. These monofilaments have correct abrasion resistance properties.
An object of a particularly preferred form of the present invention consists in how to provide polypropylene-based monofilaments that are more abrasion resistant than the monofilaments known from the prior art. Another problem of the invention consists in how to obtain polypropylene-based monofilaments that exhibit better abrasion resistance during weaving.
An object of a particularly preferred form of the present invention consists in how to provide for the use of monofilaments possessing good abrasion resistance for the manufacture of two-dimensional high- -3 00 performance articles, especially those intended for filtration.
Unless the context clearly requires otherwise, throughout the description and the claims, the words "%comprise", "comprising", and the like are to be construed in an inclusive sense as opposed to an exclusive or exhaustive sense; that is to say, in the sense of "including, but not limited to" (1 Although the invention will be described with reference to specific examples it will be appreciated by those skilled in the art that the invention may be embodied in many other forms.
Summary of the Invention According to a first aspect of the present invention there is provided a polypropylene-based monofilament, said monofilament consisting of a polypropylene having a melt flow index (MFI) at 230'C/2.16 kg of less than or equal to 1.9 g/10 min, and of 0.01 to 20% by weight relative to the weight of polypropylene, of a polypropylene/polyethylene copolymer having a melting point 140 0
C.
According to a second aspect of the present invention there is provided a process for manufacturing a monofilament according to any one of the preceding claims, comprising the steps of extrusion/melt-spinning of the polypropylene and the polypropylene/polyethylene copolymer, drawing and winding.
According to a third aspect of the present invention there is provided use of a monofilament according to the first aspect of the present invention, for the manufacture of two-dimensional high-performance articles.
According to a fourth aspect of the present invention there is provided a monofilament according to the first 4aspect of the present invention, when manufactured by a process according to the second aspect of the present CI invention.
5 Broadly, the invention embodies, in particular the use, for the manufacture of the monofilaments, of a polypropylene having a melt flow index (MFI) at 230°C/2.16 kg of less than or equal to 1.9 g/10 min.
The polypropylenes conventionally used in the C manufacture of monofilaments are isotactic polypropylenes.
The monofilaments of the invention advantageously have an abrasion of less than or equal to 0.014%.
The abrasion of the monofilaments is determined by gravimetric measurement of the amount of fluff produced during the manufacture of a 300 m length of woven fabric, using the method described below in the experimental part. The abrasion value corresponds to the result of the formula described below in the experimental part, calculated for a woven fabric length of 300 m.
It is particularly advantageous for the monofilaments to have an abrasion of less than 0.014%. This is because, when the abrasion is greater than 0.014%, irregularities may be produced during weaving, due to too rapid fouling of the reeds. This may shorten the time intervals between cleaning operations, thereby reducing the productivity of the loom.
The monofilaments of the invention preferably have an abrasion of less than or equal to 0.01%.
It is appropriate for the monofilaments to possess a strength of at least 50 cN/tex for an elongation corresponding to the maximum tensile stress (elongation at break) at least equal to 20%. This is because a 5 strength of less than 50 cN/tex has the drawback of increasing the number of yarn breakages during the weaving process.
5 The monofilaments of the invention advantageously have n a mechanical constant of greater than or equal to 285 cN/tex.
According to one particular embodiment of the
C
c 10 invention, the monofilaments include an additive.
CI Advantageously, the monofilaments include 0.01 to by weight of additive relative to the weight of C, polypropylene.
Advantageously, it is appropriate to use as additive a polypropylene/polyethylene copolymer having a melting point 140°C. Advantageously, this additive is present in a proportion of 1 to 20% by weight relative to the weight of polypropylene.
The invention also relates to a process for manufacturing the monofilaments of the invention, which comprises the steps of extrusion/melt-spinning, drawing and winding of the polypropylene.
The polypropylene-based monofilaments of the invention may be obtained using conventional spinning methods.
They are generally obtained by extrusion/melt-spinning, cooling in a water bath when the monofilament titre is greater than or equal to 0.05 mm, drawing and winding.
When the monofilaments of the invention include an additive, the additive is generally added to the polypropylene upstream of an extruder, before the spinning.
The monofilaments according to the invention are particularly suitable for the manufacture of twodimensional high-performance articles, and especially for the manufacture of such articles in the field of filtration. These articles, when they are intended for 6 filtration, especially in the chemical, pharmaceutical and food industries, are preferably woven fabrics.
The invention will now be described in greater detail with the aid of examples.
Polymer As polymer, a polypropylene having a melt flow index (MFI) at 230°C/2.16 kg of 1.7 g/10 min was used during the trials.
Each time 300 kg of polypropylene granules were employed, using 25 kg drums.
The polypropylene granules and the optional additive granules were fed directly into the extruder and melted.
Spinning conditions Extruder: Extruder pressure: Spinning pump: Spinning unit: Metering pump: Spinnerets: Water bath: Diameter: 40 mm; barrel length: L/D 80 bar Flow rate: 14.5 kg/h heating zones Metered volume: 10 cm 3 /revolution Electrically heated 23.19 revolutions/min.
Diameter: 0.7 mm Capillary length: 3 x D Distance between spinneret and water bath: 45 mm Temperature: 500C.
Drawinq staqes and heating channels Drawing stage 1: Drawing stage 2: 7 rolls; roll diameter: 230 mm; 1 heating channel 7 rolls; roll diameter: 230 mm; 1 heating channel 7 Drawing stage 3: 7 rolls; roll diameter: 230 mm; 2 0 heating channels rC Drawing stage 4: 4 rolls; roll diameter: 230 mm.
5 Measurement methods Melt flow index according to ASTM D1238 Determination of the titre according to SN 197 012 and SN 197 015, supplemented with DIN 53830/ 1C The mechanical constant MC is calculated using the CI following formula: MC=VDxF [cN/tex] where D denotes the elongation in and F denotes the strength in [cN/tex] Determination of the thermal shrinkage according to BISFA (Chapter 11 of the standard protocol: "Determination of the thermal shrinkage in hot air"), carried out under the following conditions: tension: 0.02 cN/dtex temperature: 120°C duration: 10 min.
Description of the abrasion tests Manufacture of sectional beams The sectional beams, of 1000 m each, were manufactured using monofilaments from 60 bobbins of the various versions.
Weaving trials The weaving trials were carried out on a ribbon loom.
Maximum possible production: 4000 revolutions/min.
The shed was formed by excentrics Working mode: no weft re-entry Density of warp yarns: 22.80 yarns/cm Reed: opening: 0.175 mm dent thickness: 0.264 mm dent width: 7.0 mm -8 00 Speed of rotation of the loom: 1000 revolutions/min.
Weaving speed: 10 rn/h Weave: Li/i (plain weave) cloth.
Evaluation of the abrasion behaviour: visual evaluation of the reeds gravimetric determination of the amount of f luf f produced.
In the visual determination, the reeds are photographed after a period of operation corresponding to a 300 m CI length of fabric, and a rating is assigned to them.
Figures 1A, lB and 1C show photographs of the reeds after a weaving trial according to the method described above. Figure 1A corresponds to Example 1, Figure lB to Example 2 and Figure 1C to the comparative example. The reeds of Figures 1A and lB show practically no fluff, whereas that of Figure 1C shows a not insignificant amount of fluff.
The evaluation of the abrasion behaviour using the gravimetric method is described below. To do this, all of the fluff formed after a period of operation corresponding to a fabric length of 300 m is collected, weighed and expressed with respect to the warp yarns using the following formula: fluff deposit mass of deposit x 100 No.of arpyars xwarp yarn length x titre 10000 The abrasion behaviour may also be evaluated using the same gravimetric method described above, but for a fabric length of 1000 m.
Figure 2 shows the results in terms of abrasion behaviour of Examples 1 and 2 and the comparative example.
9 Examples Example 1 Monofilaments were obtained from granules of polypropylene having a melt flow index (MFI) at 230 0 C/2.16 kg of 1.7 g/10 min, using a method and under the conditions described above.
Example 2 Monofilaments polypropylene polypropylene melting point were obtained from granules of and from granules consisting of and of PP/PE modified polyolefin, with a 140 0
C.
The examples are summarized in Table 1.
Table 1 Example 1 2 Additive by weight) Diameter [mm] 0.15 0.15 Strength [cN/tex] 61 56.5 Elongation corresponding 35.7 38.5 to the maximum tensile stress Mechanical constant 364 351 Thermal shrinkage 2.5 3.4 Abrasion (300 m of 0.0094 0.004 fabric) Abrasion (1000 m of 0.0206 fabric) Comparative example Monofilaments were obtained in accordance with Example 2 of Patent Application WO 03/048434. Their abrasion was 0.0156%.
10 00 The monofilaments according to the invention are suitable for the manufacture, without any abrasion, of C1 fabrics intended for filtration.
Thanks to the monofilaments according to the invention, it is possible to weave the polypropylene monofilament practically without any abrasion and to considerably increase the operation time of the loom. This monofilament is particularly suitable for the manufacture of fabrics that are used for filtration in the CI chemical, pharmaceutical and food industries.
Unless the context clearly requires otherwise, throughout the description and the claims, the words "comprise", "comprising", and the like are to be construed in an inclusive sense as opposed to an exclusive or exhaustive sense; that is to say, in the sense of "including, but not limited to".
Although the invention has been described with reference to specific examples it will be appreciated by those skilled in the art that the invention may be embodied in many other forms.
Claims (10)
- 3. A monofilament according to claim 1 or claim 2, said monofilament having an abrasion value of less than or equal to 0.01%.
- 4. A monofilament according to any one of the preceding claims, said monofilament having a strength of at least 50 cN/tex for an elongation corresponding to the maximum tensile stress (elongation at break) at least equal to
- 5. A monofilament according to any one of the preceding claims, said monofilament including 1 to 20% by weight of this copolymer relative to the weight of polypropylene.
- 6. A process for manufacturing a monofilament according to any one of the preceding claims, comprising the steps of extrusion/melt-spinning of the polypropylene and the polypropylene/polyethylene copolymer, drawing and winding.
- 7. Use of a monofilament according to any one of claims 1 to 5, for the manufacture of two- dimensional high-performance articles. I 12
- 8. Use according to claim 7, in the field of 00 filtration.
- 9. Use according to claim 7 or claim 8, wherein the 5 article is a fabric for filtration. A monofilament according to any one of claims 1 to 5, when manufactured by a process according to claim 6. CI 11. A polypropylene-based monofilament, said monofilament substantially as herein described with reference to any one of the embodiments of the invention illustrated in the accompanying drawings and/or examples, but excluding comparative examples.
- 12. A process for manufacturing a monofilament substantially as herein described with reference to any one of the embodiments of the invention illustrated in the accompanying drawings and/or examples, but excluding comparative examples.
- 13. Use of a monofilament substantially as herein described with reference to any one of the embodiments of the invention illustrated in the accompanying drawings and/or examples, but excluding comparative examples.
- 14. A monofilament, when manufactured by a process substantially as herein described with reference to any one of the embodiments of the invention illustrated in the accompanying drawings and/or examples, but excluding comparative examples. Dated this 3 rd day of June 2008 Shelston IP Attorneys for: Rhodia Chimie
Applications Claiming Priority (3)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
FR0403283A FR2868438B1 (en) | 2004-03-30 | 2004-03-30 | MONOFILAMENTS BASED ON POLYPROPYLENE WITH IMPROVED PROPERTIES |
FR0403283 | 2004-03-30 | ||
PCT/FR2005/000688 WO2005100649A1 (en) | 2004-03-30 | 2005-03-22 | Polypropylene monofilaments with improved properties |
Publications (2)
Publication Number | Publication Date |
---|---|
AU2005233341A1 AU2005233341A1 (en) | 2005-10-27 |
AU2005233341B2 true AU2005233341B2 (en) | 2008-07-10 |
Family
ID=34944335
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
AU2005233341A Ceased AU2005233341B2 (en) | 2004-03-30 | 2005-03-22 | Polypropylene monofilaments with improved properties |
Country Status (12)
Country | Link |
---|---|
US (1) | US20080113194A1 (en) |
EP (1) | EP1730334A1 (en) |
JP (1) | JP2007530813A (en) |
KR (1) | KR20060132985A (en) |
CN (1) | CN1950551A (en) |
AU (1) | AU2005233341B2 (en) |
BR (1) | BRPI0508733A (en) |
CA (1) | CA2561321A1 (en) |
FR (1) | FR2868438B1 (en) |
TW (1) | TW200613594A (en) |
WO (1) | WO2005100649A1 (en) |
ZA (1) | ZA200608115B (en) |
Families Citing this family (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JP7062984B2 (en) * | 2018-02-06 | 2022-05-09 | 東レ株式会社 | Abrasion tester for the surface of raw yarn for woven fabrics |
CN109023647B (en) * | 2018-08-22 | 2020-11-10 | 安徽利思达网业有限公司 | Preparation method of wear-resistant monofilament filter cloth for filtering high-temperature liquid |
Citations (4)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPS6241311A (en) * | 1985-08-09 | 1987-02-23 | Chisso Corp | Improved polypropylene monofilament and production thereof |
JPH02104716A (en) * | 1988-10-14 | 1990-04-17 | Ube Nitto Kasei Co Ltd | Particular high-tenacity monofilament |
JPH06184811A (en) * | 1992-12-21 | 1994-07-05 | Mitsubishi Petrochem Co Ltd | Raw fiber for artificial turf |
WO2002086207A1 (en) * | 2001-04-24 | 2002-10-31 | Rhodia Industrial Yarns Ag | Method for producing fine monofilaments consisting of polypropylene, fine monofilaments consisting of polypropylene and the use thereof |
Family Cites Families (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPS61152810A (en) * | 1984-12-27 | 1986-07-11 | Chisso Corp | Production of improved polypropylene monofilament |
BR0215107A (en) * | 2001-12-05 | 2004-11-03 | Rhodia Industrial Yarns Ag | Manufacturing process of polypropylene monofilaments, propylene monofilaments and their use |
-
2004
- 2004-03-30 FR FR0403283A patent/FR2868438B1/en not_active Expired - Fee Related
-
2005
- 2005-03-22 AU AU2005233341A patent/AU2005233341B2/en not_active Ceased
- 2005-03-22 JP JP2007505575A patent/JP2007530813A/en active Pending
- 2005-03-22 KR KR1020067020477A patent/KR20060132985A/en not_active Application Discontinuation
- 2005-03-22 US US11/547,155 patent/US20080113194A1/en not_active Abandoned
- 2005-03-22 CA CA002561321A patent/CA2561321A1/en not_active Abandoned
- 2005-03-22 EP EP05742619A patent/EP1730334A1/en not_active Withdrawn
- 2005-03-22 WO PCT/FR2005/000688 patent/WO2005100649A1/en active Application Filing
- 2005-03-22 BR BRPI0508733-3A patent/BRPI0508733A/en not_active IP Right Cessation
- 2005-03-22 CN CNA2005800144789A patent/CN1950551A/en active Pending
- 2005-03-29 TW TW094109844A patent/TW200613594A/en unknown
-
2006
- 2006-09-29 ZA ZA200608115A patent/ZA200608115B/en unknown
Patent Citations (4)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPS6241311A (en) * | 1985-08-09 | 1987-02-23 | Chisso Corp | Improved polypropylene monofilament and production thereof |
JPH02104716A (en) * | 1988-10-14 | 1990-04-17 | Ube Nitto Kasei Co Ltd | Particular high-tenacity monofilament |
JPH06184811A (en) * | 1992-12-21 | 1994-07-05 | Mitsubishi Petrochem Co Ltd | Raw fiber for artificial turf |
WO2002086207A1 (en) * | 2001-04-24 | 2002-10-31 | Rhodia Industrial Yarns Ag | Method for producing fine monofilaments consisting of polypropylene, fine monofilaments consisting of polypropylene and the use thereof |
Also Published As
Publication number | Publication date |
---|---|
BRPI0508733A (en) | 2007-08-14 |
AU2005233341A1 (en) | 2005-10-27 |
ZA200608115B (en) | 2008-06-25 |
JP2007530813A (en) | 2007-11-01 |
WO2005100649A1 (en) | 2005-10-27 |
KR20060132985A (en) | 2006-12-22 |
US20080113194A1 (en) | 2008-05-15 |
CN1950551A (en) | 2007-04-18 |
FR2868438B1 (en) | 2006-10-20 |
TW200613594A (en) | 2006-05-01 |
EP1730334A1 (en) | 2006-12-13 |
FR2868438A1 (en) | 2005-10-07 |
CA2561321A1 (en) | 2005-10-27 |
Similar Documents
Publication | Publication Date | Title |
---|---|---|
AU2011250680B2 (en) | Melt-spun multifilament polyolefin yarn formation processes and yarns formed therefrom | |
US10434445B2 (en) | Woven geotextile filtration fabrics including core-sheath spun yarns | |
JP3893995B2 (en) | Resin composition and molded body | |
AU2002352212B2 (en) | Method for making propylene monofilaments, propylene monofilaments and their use | |
AU2005233340B2 (en) | Polypropylene monofilaments with improved properties | |
JP5254730B2 (en) | Thin fabric for organdy | |
US8293364B2 (en) | Highly shrinkable fiber | |
AU2005233341B2 (en) | Polypropylene monofilaments with improved properties | |
JP4852374B2 (en) | Separating polyester filament and palatable beverage extraction filter obtained therefrom | |
KR102575877B1 (en) | Core-sheath composite cross-sectional fiber with excellent hygroscopicity and wrinkle resistance | |
KR20220158749A (en) | Polyphenylene sulfide monofilament, manufacturing method and fiber package | |
JP3786004B2 (en) | Aliphatic polyester resin composition, molded article and method for producing the same | |
JP2021161572A (en) | Fiber package made of polyphenylene sulfide monofilament, and method of producing the same | |
Phillips et al. | The technology of polypropylene tape yarns: processing and applications | |
CA2976264C (en) | Woven geotextile filtration fabrics including core-sheath spun yarns | |
JPH01118637A (en) | Bulky processed yarn |
Legal Events
Date | Code | Title | Description |
---|---|---|---|
FGA | Letters patent sealed or granted (standard patent) | ||
MK14 | Patent ceased section 143(a) (annual fees not paid) or expired |