EP0733131A1 - Monofilament for papermaker's fabric - Google Patents
Monofilament for papermaker's fabricInfo
- Publication number
- EP0733131A1 EP0733131A1 EP95904768A EP95904768A EP0733131A1 EP 0733131 A1 EP0733131 A1 EP 0733131A1 EP 95904768 A EP95904768 A EP 95904768A EP 95904768 A EP95904768 A EP 95904768A EP 0733131 A1 EP0733131 A1 EP 0733131A1
- Authority
- EP
- European Patent Office
- Prior art keywords
- copolymerized
- recurring units
- dimethanol
- cyclohexane
- terephthalic acid
- 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.)
- Granted
Links
- 239000004744 fabric Substances 0.000 title claims abstract description 29
- 239000004417 polycarbonate Substances 0.000 claims abstract description 28
- 229920000515 polycarbonate Polymers 0.000 claims abstract description 13
- 229920002959 polymer blend Polymers 0.000 claims abstract description 8
- KKEYFWRCBNTPAC-UHFFFAOYSA-N Terephthalic acid Chemical compound OC(=O)C1=CC=C(C(O)=O)C=C1 KKEYFWRCBNTPAC-UHFFFAOYSA-N 0.000 claims description 62
- LYCAIKOWRPUZTN-UHFFFAOYSA-N Ethylene glycol Chemical compound OCCO LYCAIKOWRPUZTN-UHFFFAOYSA-N 0.000 claims description 35
- YIMQCDZDWXUDCA-UHFFFAOYSA-N [4-(hydroxymethyl)cyclohexyl]methanol Chemical compound OCC1CCC(CO)CC1 YIMQCDZDWXUDCA-UHFFFAOYSA-N 0.000 claims description 34
- 229920001634 Copolyester Polymers 0.000 claims description 21
- QQVIHTHCMHWDBS-UHFFFAOYSA-N isophthalic acid Chemical compound OC(=O)C1=CC=CC(C(O)=O)=C1 QQVIHTHCMHWDBS-UHFFFAOYSA-N 0.000 claims description 12
- 238000000034 method Methods 0.000 claims description 12
- 230000000295 complement effect Effects 0.000 claims description 10
- WGCNASOHLSPBMP-UHFFFAOYSA-N hydroxyacetaldehyde Natural products OCC=O WGCNASOHLSPBMP-UHFFFAOYSA-N 0.000 claims description 10
- -1 cyclic aliphatic glycols Chemical class 0.000 claims description 9
- 229920000728 polyester Polymers 0.000 claims description 9
- IISBACLAFKSPIT-UHFFFAOYSA-N bisphenol A Chemical compound C=1C=C(O)C=CC=1C(C)(C)C1=CC=C(O)C=C1 IISBACLAFKSPIT-UHFFFAOYSA-N 0.000 claims description 8
- OFOBLEOULBTSOW-UHFFFAOYSA-N Malonic acid Chemical compound OC(=O)CC(O)=O OFOBLEOULBTSOW-UHFFFAOYSA-N 0.000 claims description 6
- 230000001588 bifunctional effect Effects 0.000 claims description 4
- RTZKZFJDLAIYFH-UHFFFAOYSA-N ether Substances CCOCC RTZKZFJDLAIYFH-UHFFFAOYSA-N 0.000 claims description 4
- 125000004432 carbon atom Chemical group C* 0.000 claims description 3
- 229920000642 polymer Polymers 0.000 abstract description 26
- 238000004519 manufacturing process Methods 0.000 abstract description 6
- 230000003301 hydrolyzing effect Effects 0.000 abstract description 4
- 230000000717 retained effect Effects 0.000 description 25
- 239000000203 mixture Substances 0.000 description 24
- FDSYTWVNUJTPMA-UHFFFAOYSA-N 2-[3,9-bis(carboxymethyl)-3,6,9,15-tetrazabicyclo[9.3.1]pentadeca-1(15),11,13-trien-6-yl]acetic acid Chemical compound C1N(CC(O)=O)CCN(CC(=O)O)CCN(CC(O)=O)CC2=CC=CC1=N2 FDSYTWVNUJTPMA-UHFFFAOYSA-N 0.000 description 16
- 239000004594 Masterbatch (MB) Substances 0.000 description 9
- 230000007062 hydrolysis Effects 0.000 description 8
- 238000006460 hydrolysis reaction Methods 0.000 description 8
- 239000008188 pellet Substances 0.000 description 7
- 230000000052 comparative effect Effects 0.000 description 5
- 239000000155 melt Substances 0.000 description 5
- 229920000139 polyethylene terephthalate Polymers 0.000 description 5
- 239000005020 polyethylene terephthalate Substances 0.000 description 5
- BVKZGUZCCUSVTD-UHFFFAOYSA-L Carbonate Chemical compound [O-]C([O-])=O BVKZGUZCCUSVTD-UHFFFAOYSA-L 0.000 description 4
- 238000001125 extrusion Methods 0.000 description 4
- 239000007788 liquid Substances 0.000 description 4
- 150000002989 phenols Chemical class 0.000 description 4
- ISWSIDIOOBJBQZ-UHFFFAOYSA-N Phenol Chemical compound OC1=CC=CC=C1 ISWSIDIOOBJBQZ-UHFFFAOYSA-N 0.000 description 3
- 239000004734 Polyphenylene sulfide Substances 0.000 description 3
- DNIAPMSPPWPWGF-UHFFFAOYSA-N Propylene glycol Chemical compound CC(O)CO DNIAPMSPPWPWGF-UHFFFAOYSA-N 0.000 description 3
- 150000001991 dicarboxylic acids Chemical class 0.000 description 3
- MTHSVFCYNBDYFN-UHFFFAOYSA-N diethylene glycol Chemical compound OCCOCCO MTHSVFCYNBDYFN-UHFFFAOYSA-N 0.000 description 3
- 125000002887 hydroxy group Chemical group [H]O* 0.000 description 3
- 230000000704 physical effect Effects 0.000 description 3
- 229920000069 polyphenylene sulfide Polymers 0.000 description 3
- 239000000126 substance Substances 0.000 description 3
- HIXDQWDOVZUNNA-UHFFFAOYSA-N 2-(3,4-dimethoxyphenyl)-5-hydroxy-7-methoxychromen-4-one Chemical compound C=1C(OC)=CC(O)=C(C(C=2)=O)C=1OC=2C1=CC=C(OC)C(OC)=C1 HIXDQWDOVZUNNA-UHFFFAOYSA-N 0.000 description 2
- QIGBRXMKCJKVMJ-UHFFFAOYSA-N Hydroquinone Chemical compound OC1=CC=C(O)C=C1 QIGBRXMKCJKVMJ-UHFFFAOYSA-N 0.000 description 2
- 238000005299 abrasion Methods 0.000 description 2
- 239000002253 acid Substances 0.000 description 2
- WNLRTRBMVRJNCN-UHFFFAOYSA-N adipic acid Chemical compound OC(=O)CCCCC(O)=O WNLRTRBMVRJNCN-UHFFFAOYSA-N 0.000 description 2
- 230000002411 adverse Effects 0.000 description 2
- 125000003118 aryl group Chemical group 0.000 description 2
- PXKLMJQFEQBVLD-UHFFFAOYSA-N bisphenol F Chemical compound C1=CC(O)=CC=C1CC1=CC=C(O)C=C1 PXKLMJQFEQBVLD-UHFFFAOYSA-N 0.000 description 2
- WERYXYBDKMZEQL-UHFFFAOYSA-N butane-1,4-diol Chemical compound OCCCCO WERYXYBDKMZEQL-UHFFFAOYSA-N 0.000 description 2
- 229920001577 copolymer Polymers 0.000 description 2
- 238000005906 dihydroxylation reaction Methods 0.000 description 2
- 238000001035 drying Methods 0.000 description 2
- 150000002334 glycols Chemical class 0.000 description 2
- 238000010348 incorporation Methods 0.000 description 2
- 239000000463 material Substances 0.000 description 2
- 238000010128 melt processing Methods 0.000 description 2
- 238000002156 mixing Methods 0.000 description 2
- 239000002245 particle Substances 0.000 description 2
- XNGIFLGASWRNHJ-UHFFFAOYSA-N phthalic acid Chemical compound OC(=O)C1=CC=CC=C1C(O)=O XNGIFLGASWRNHJ-UHFFFAOYSA-N 0.000 description 2
- GHMLBKRAJCXXBS-UHFFFAOYSA-N resorcinol Chemical compound OC1=CC=CC(O)=C1 GHMLBKRAJCXXBS-UHFFFAOYSA-N 0.000 description 2
- 238000000926 separation method Methods 0.000 description 2
- 239000002002 slurry Substances 0.000 description 2
- 229920001169 thermoplastic Polymers 0.000 description 2
- 239000004416 thermosoftening plastic Substances 0.000 description 2
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 2
- LVLNPXCISNPHLE-UHFFFAOYSA-N (2-Hydroxy-phenyl)-(4-hydroxy-phenyl)-methan Natural products C1=CC(O)=CC=C1CC1=CC=CC=C1O LVLNPXCISNPHLE-UHFFFAOYSA-N 0.000 description 1
- 229940043375 1,5-pentanediol Drugs 0.000 description 1
- MQCPOLNSJCWPGT-UHFFFAOYSA-N 2,2'-Bisphenol F Chemical compound OC1=CC=CC=C1CC1=CC=CC=C1O MQCPOLNSJCWPGT-UHFFFAOYSA-N 0.000 description 1
- RKSBPFMNOJWYSB-UHFFFAOYSA-N 3,3-Bis(4-hydroxyphenyl)pentane Chemical compound C=1C=C(O)C=CC=1C(CC)(CC)C1=CC=C(O)C=C1 RKSBPFMNOJWYSB-UHFFFAOYSA-N 0.000 description 1
- VPWNQTHUCYMVMZ-UHFFFAOYSA-N 4,4'-sulfonyldiphenol Chemical compound C1=CC(O)=CC=C1S(=O)(=O)C1=CC=C(O)C=C1 VPWNQTHUCYMVMZ-UHFFFAOYSA-N 0.000 description 1
- NZGQHKSLKRFZFL-UHFFFAOYSA-N 4-(4-hydroxyphenoxy)phenol Chemical compound C1=CC(O)=CC=C1OC1=CC=C(O)C=C1 NZGQHKSLKRFZFL-UHFFFAOYSA-N 0.000 description 1
- DTOMAXGIWFLDMR-UHFFFAOYSA-N 4-[(4-hydroxy-3-nitrophenyl)methyl]-2-nitrophenol Chemical compound C1=C([N+]([O-])=O)C(O)=CC=C1CC1=CC=C(O)C([N+]([O-])=O)=C1 DTOMAXGIWFLDMR-UHFFFAOYSA-N 0.000 description 1
- WCUDAIJOADOKAW-UHFFFAOYSA-N 4-[2-(4-hydroxyphenyl)pentan-2-yl]phenol Chemical compound C=1C=C(O)C=CC=1C(C)(CCC)C1=CC=C(O)C=C1 WCUDAIJOADOKAW-UHFFFAOYSA-N 0.000 description 1
- ALQSHHUCVQOPAS-UHFFFAOYSA-N Pentane-1,5-diol Chemical compound OCCCCCO ALQSHHUCVQOPAS-UHFFFAOYSA-N 0.000 description 1
- YGYAWVDWMABLBF-UHFFFAOYSA-N Phosgene Chemical compound ClC(Cl)=O YGYAWVDWMABLBF-UHFFFAOYSA-N 0.000 description 1
- 150000007513 acids Chemical class 0.000 description 1
- 235000011037 adipic acid Nutrition 0.000 description 1
- 239000001361 adipic acid Substances 0.000 description 1
- 150000001491 aromatic compounds Chemical class 0.000 description 1
- 229910052799 carbon Inorganic materials 0.000 description 1
- 230000015556 catabolic process Effects 0.000 description 1
- 238000006243 chemical reaction Methods 0.000 description 1
- 230000006835 compression Effects 0.000 description 1
- 238000007906 compression Methods 0.000 description 1
- 238000007796 conventional method Methods 0.000 description 1
- FOTKYAAJKYLFFN-UHFFFAOYSA-N decane-1,10-diol Chemical compound OCCCCCCCCCCO FOTKYAAJKYLFFN-UHFFFAOYSA-N 0.000 description 1
- 238000006114 decarboxylation reaction Methods 0.000 description 1
- 238000006731 degradation reaction Methods 0.000 description 1
- 238000013461 design Methods 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 150000002148 esters Chemical class 0.000 description 1
- 238000001704 evaporation Methods 0.000 description 1
- 230000008020 evaporation Effects 0.000 description 1
- 239000000835 fiber Substances 0.000 description 1
- 125000000524 functional group Chemical group 0.000 description 1
- 230000005484 gravity Effects 0.000 description 1
- 238000009998 heat setting Methods 0.000 description 1
- 229920001519 homopolymer Polymers 0.000 description 1
- 229960004337 hydroquinone Drugs 0.000 description 1
- SLCVBVWXLSEKPL-UHFFFAOYSA-N neopentyl glycol Chemical compound OCC(C)(C)CO SLCVBVWXLSEKPL-UHFFFAOYSA-N 0.000 description 1
- 229920005668 polycarbonate resin Polymers 0.000 description 1
- 239000004431 polycarbonate resin Substances 0.000 description 1
- 238000006068 polycondensation reaction Methods 0.000 description 1
- 238000012667 polymer degradation Methods 0.000 description 1
- 239000002243 precursor Substances 0.000 description 1
- 238000003825 pressing Methods 0.000 description 1
- 238000010791 quenching Methods 0.000 description 1
- 230000000171 quenching effect Effects 0.000 description 1
- 239000007787 solid Substances 0.000 description 1
- 238000009987 spinning Methods 0.000 description 1
- 229920001059 synthetic polymer Polymers 0.000 description 1
- 238000009864 tensile test Methods 0.000 description 1
- 238000012360 testing method Methods 0.000 description 1
- 238000005809 transesterification reaction Methods 0.000 description 1
- ZIBGPFATKBEMQZ-UHFFFAOYSA-N triethylene glycol Chemical compound OCCOCCOCCO ZIBGPFATKBEMQZ-UHFFFAOYSA-N 0.000 description 1
- 239000003039 volatile agent Substances 0.000 description 1
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
- D01F6/88—Monocomponent artificial filaments or the like of synthetic polymers; Manufacture thereof from mixtures of polycondensation products as major constituent with other polymers or low-molecular-weight compounds
- D01F6/92—Monocomponent artificial filaments or the like of synthetic polymers; Manufacture thereof from mixtures of polycondensation products as major constituent with other polymers or low-molecular-weight compounds of polyesters
Definitions
- the present invention relates generally to monofilament yarns for industrial fabric, and especially to yarns for use in papermaking fabrics.
- a slurry of pulp in a succession of steps.
- the slurry is deposited on a porous fabric which drains much of the liquid by gravity and suction and leaves a wet web of solids on the fabric surface.
- the wet web is typically compressed between fabrics to remove additional liquid.
- drying step more liquid is removed by evaporation, usually by supporting the web by dryer fabrics so that the web is contacted with large diameter, smooth, heated rolls.
- the fabrics should be structurally strong, flexible, abrasion resistant and able to resist the harsh chemicals and high temperatures to which they can be exposed for extended times.
- PET polyethylene terephthalate
- PPS polyphenylene sulfide
- PPS monofilament has excellent hydrolytic stability but is very expensive, highly crystalline, relatively brittle, and exhibits low knot and loop strengths. It is desired to provide a low cost, strong, polymeric monofilament for industrial fabrics, which meets the demands of papermaking, including high knot strength and good hydrolytic stability. It is also desired to provide a monofilament which is suitable for use in the automated manufacturing process for such fabrics.
- the present invention provides high knot strength, hydrolysis resistant monofilament for use in papermaker's fabric. More specifically, there is provided a monofilament of a polymer blend consisting essentially of:
- a polyester selected from the group consisting of (1) polycarbonate and (2) glycol-modified copolyester comprising recurring units of copolymerized cyclohexane-1 , 4-dimethanol and copolymerized terephthalic acid, and recurring units of a copolymerized glycol other than cyclohexane-1, 4- dimethanol and copolymerized terephthalic acid; and
- the Figure is a graph of the percent retained knot strength (A) and the percent coefficient of variation of retained knot strength (B) , plotted against the weight percent polycarbonate in a monofilament of one embodiment of the present invention.
- the polymer blend suitable for the monofilament of this invention consists essentially of two polymers.
- the term “consists essentially of” as used herein means that the blend can include other components; provided that such components do not significantly detract from the function or operability of the invention.
- the term “monofilament” as used herein means a single fiber structure and is used interchangeably with the term “yarn” .
- One polymer of the blend is an acid-modified copolyester, occasionally hereinafter referred to as PCTA. It is a semicrystalline thermoplastic copolymer substantially of two recurring units. One such recurring unit is of copolymerized cyclohexane-1,4-dimethanol (CHDM) and copolymerized terephthalic acid. The other recurring unit is of copolymerized CHDM and a copolymerized dicarboxylic acid other than terephthalic acid. Th s, recurring units are according to the following formulae (I) and (II) , respectively:
- CHDM' is a radical obtained by dehydroxylation of
- CHDM CHDM
- AR1 is a radical of decarboxylated terephthalic acid
- AR2 is a radical obtained by decarboxylation of a dicarboxylic acid other than terephthalic acid.
- PCTA can be prepared either by direct polyesterification of CHDM with an appropriate mixture of dicarboxylic acids, or by transesterification of dialkyl esters of dicarboxylic acids with an effective amount of
- PCTA is seen to be a copolyester of poly(cyclohexane-1,4-dimethylene terephthalate) wherein a portion of the terephthaloyl radical is replaced by isophthaloyl or phthaloyl radicals.
- the amount of recurring unit (I) is from about 10-99 mole percent, preferably 50-99 mole percent, and more preferably, about 90-97 mole percent of the total of recurring units (I) and (II) .
- the second polymer of the blend is polycarbonate or a glycol-modified copolyester, occasionally hereinafter referred to as PCTG.
- PCTG is a semicrystalline thermoplastic copolymer substantially of two recurring units .
- One such recurring unit is of copolymerized CHDM and copolymerized terephthalic acid in accordance with formula (I) .
- the other recurring unit is of a copolymerized glycol other than CHDM and copolymerized terephthalic acid, according to the following formula
- R is an organic radical containing 2-20 carbon atoms obtained by dehydroxylation of a linear, branched or cyclic aliphatic bifunctional glycol or ether glycol .
- bifunctional glycols suitable for use in the glycol-modified copolyester component are ethylene glycol; 1,4-butanediol; 1, 5-pentanediol and 1,10- decanediol .
- ether glycols are diethylene glycol and triethylene glycol . Ethylene glycol is preferred.
- Polycarbonate suitable for use in the present invention includes carbonate polymers of dihydric phenols as well as carbonate copolymers of glycols, such as, for example, ethylene glycol or propylene glycol; dibasic acids, such as, for example, isophthalic or terephthalic acid; and hydroxyl or acid-terminated polyesters, such as, for example, the hydroxyl or acid-terminated polyester of neopentyl glycol and adipic acid.
- Such polycarbonate resins may be prepared by reacting a dihydric phenol with a carbonate precursor such as phosgene, a haloformate or a carbonate ester.
- the resulting carbonate polymers may be typified as having recurring units of the following formula (IV) :
- A is a divalent aromatic radical of the dihydric phenol, preferably 4 , ' -isopropylidenebisbenzenol, (bisphenol A) , employed in the polymer producing reaction.
- the dihydric phenols which may be employed to provide such aromatic carbonate polymers are mononuclear or polynuclear aromatic compounds, containing as functional groups, two hydroxyl radicals, each of which is attached directly to a carbon atom of an aromatic nucleus.
- Typical dihydric phenols are 2, 2-bis- (4-hydroxyphenyl) -propane; 1,3- benzenediol; 1,4-benzenediol; 2, 2-bis- (4-hydroxyphenyl) - pentane; 2,4' -dihydroxydiphenyl methane; bis- (2- hydroxyphenyl) -methane; bis- (4-hydroxyphenyl) -methane; bis- (4-hydroxy-5-nitrophenyl) -methane; l,l-bis-(4- hydroxyphenyl) -ethane; 3, 3-bis- (4-hydroxyphenyl) -pentane; 2, 6-dihydroxynapthalene; bis- (4-hydroxyphenyl) -sulfone; 2,2' -dihydroxydiphenyl sulfone; 4,4' -dihydroxydiphenyl ether; and 4,4' -dihydroxy-2, 5-diethoxydiphenyl ether.
- the monofilament of the present invention can be prepared using conventional monofilament production equipment.
- the components of the polymer blend are typically supplied as particles in granular or pellet form. They should have a low moisture content to avoid degradation during subsequent melt processing.
- the particles can be melt blended continuously, in equipment such as single screw and twin-screw extruders, or batchwise in BanburyTM or BrabenderTM mixers.
- Monofilament of this invention should be made by when the melt blending at lower shear conditions than is conventional in polymer melt blending operations. Reduced shear averts polymer degradation during melt processing. Low shear can be achieved by known methods such as slowing the processor screw speed or using a low compression ratio screw. Normally, this is accompanied by a compensating reduction in production rate to achieve a uniform blend. The minor component should be uniformly dispersed throughout the composition.
- Monofilament for papermaker's fabric typically has a diameter in the range of about 0.1 to 1.5 mm.
- the monofilament of the present invention can be made into industrial fabric by conventional methods. It can be woven on looms in the traditional warp and fill fabric structure or formed into spiral structure in which parallel spiral monofilaments are intermeshed with pintle yarns .
- the fabric of this invention can be formed exclusively from the novel monofilament or from the novel monofilament in combination with other materials. A preferred use for the fabric of this invention is in papermaking machines.
- Monofilament from PCTA blends of this invention provides high retained knot strength in combination with good hydrolysis resistance at reasonable cost.
- PCTA absent added polymer blend components as herein provided, has hydrolysis resistance superior to PET but only moderate knot strength because it is brittle.
- Incorporation of small amounts of polycarbonate or glycol-modified copolyester into PCTA dramatically improves retained knot strength, while maintaining hydrolysis resistance, and without substantially adversely affecting other physical properties. It is now also revealed that the coefficient of variation of retained knot strength of the blended composition yarn is, unexpectedly, significantly less than that of wholly PCTA yarn. Consequently, the yarn of this invention is not only more ductile than PCTA yarn, but it can resist breaking during fabric forming and papermaking operations more consistently, and with better predictability, than PCTA yarn.
- tensile strength and related properties were measured on a tensile testing machine operated with 10 inch/minute jaw separation rate and 10 inch initial jaw separation. Modulus was measured as the slope of the stress/strain curve at 1 percent strain. Free shrink was measured as percent dimensional change after unrestrained exposure to 400°F for 15 minutes. Hydrolysis resistance was measured as percent of initial tensile strength at break retained by the sample after 5 hours of exposure to steam at 325°F.
- Polymer A Eastman Chemicals, hereinafter "Polymer A", pellets were mixed to obtain mixtures of 5 % and 10 % PC in Polymer A.
- each mixture was fed to a 1.5 inch single screw extruder equipped with a general purpose screw operating at 24.7 rpm and 552°F to obtain a melt blend.
- melt blends were filtered through a 250 mesh (70 ⁇ m) screen pack and extruded through a multihole die.
- the extrudate was quenched under water and drawn to a ratio of
- Examples 2-5 and Comparative Example C2 PC and Polymer A were dried at 250°F for 6 hours to less than 0.02 % moisture and tumbled to obtain a 30 % PC mixture.
- the mixture was continuously melt blended at 225 pounds per hour in a twin-screw extruder equipped with a vacuum vent port and operated at 15 inches Hg, to obtain 400 pounds of masterbatch.
- the screw speed was 312 rpm and the extruder zones 1-6, die and melt temperatures were 510, 520, 500, 490, 490, 490, 515 and 495°F, respectively.
- the melt blend was extruded as strand, quenched and cut to pellets.
- the masterbatch pellets were crystallized in pans at 350°F for 2.5 hours.
- Polymer G A masterbatch of 30 % KODARTM 5445 PCTG from Eastman Chemicals, hereinafter "Polymer G” and 70% Polymer A was prepared as in Examples 2-5. Extruder zones 1-6, die and melt temperatures were 500, 510, 490, 480, 480, 480, 510 and 490°F, respectively. Screw speed was 325 rpm and production rate was 220 pounds per hour.
- Example 6 The procedures of Examples 6 and C2 were repeated except that the first stage draw ratio was increased from 3.8:1 to 4.2:1. Yarn samples were analyzed and the results are shown in Table 2. Tenacity improvement from about 2.9 of Examples 6 and C2, to about 3.2 grams/denier was observed in both Examples 8 and C3. However, retained knot strength of C3 dropped to 27.7 % and coefficient of variation increased to 51.5 %. Surprisingly, the retained knot strength of Example 8 remained high at 58.9 % and variability improved to 6.8 %, despite the fact that tenacity was increased by raising the draw ratio relative to Example 6.
- Example 9-10 and Comparative Example C4 A masterbatch of 30% Polymer G and 70% Polymer A was prepared as in Example 6. The masterbatch and a separate stream of Polymer A pellets were metered to a yarn extrusion line in proportions to produce yarns of 3.0, 1.5 and 0 % Polymer G. Samples of the 0.6 mm diameter yarns were tested and the results are shown in Table 3. Table 3
- Example C4 10 tenacity, grams per denier 2.6 2.67 2.53
Landscapes
- Chemical & Material Sciences (AREA)
- Chemical Kinetics & Catalysis (AREA)
- General Chemical & Material Sciences (AREA)
- Engineering & Computer Science (AREA)
- Textile Engineering (AREA)
- Artificial Filaments (AREA)
- Paper (AREA)
- Cleaning Implements For Floors, Carpets, Furniture, Walls, And The Like (AREA)
Abstract
Description
Claims
Applications Claiming Priority (3)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
US16388593A | 1993-12-08 | 1993-12-08 | |
PCT/US1994/013725 WO1995016064A1 (en) | 1993-12-08 | 1994-11-30 | Monofilament for papermaker's fabric |
US163885 | 2002-06-05 |
Publications (2)
Publication Number | Publication Date |
---|---|
EP0733131A1 true EP0733131A1 (en) | 1996-09-25 |
EP0733131B1 EP0733131B1 (en) | 1997-08-06 |
Family
ID=22592005
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
EP95904768A Expired - Lifetime EP0733131B1 (en) | 1993-12-08 | 1994-11-30 | Monofilament for papermaker's fabric |
Country Status (9)
Country | Link |
---|---|
EP (1) | EP0733131B1 (en) |
AT (1) | ATE156527T1 (en) |
AU (1) | AU682426B2 (en) |
CA (1) | CA2119904C (en) |
DE (1) | DE69404862T2 (en) |
FI (1) | FI961280A (en) |
NO (1) | NO962411D0 (en) |
NZ (1) | NZ277927A (en) |
WO (1) | WO1995016064A1 (en) |
Families Citing this family (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
DE19834008C2 (en) | 1998-07-29 | 2000-11-30 | Johns Manville Int Inc | Monofilament bicomponent threads of the core sheath type, process for their production and their use |
Citations (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPS5696914A (en) * | 1980-01-07 | 1981-08-05 | Teijin Ltd | Polyester monofilament and its production |
Family Cites Families (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
DE1222205B (en) * | 1955-12-22 | 1966-08-04 | Eastman Kodak Co | Certain polyesters for making foils or threads |
DE4307392C2 (en) * | 1993-03-10 | 2001-03-29 | Klaus Bloch | Monofilament with increased hydrolysis resistance based on polyester for use in technical fabrics and processes for its manufacture |
-
1994
- 1994-03-21 CA CA002119904A patent/CA2119904C/en not_active Expired - Fee Related
- 1994-11-30 DE DE69404862T patent/DE69404862T2/en not_active Expired - Fee Related
- 1994-11-30 NZ NZ277927A patent/NZ277927A/en unknown
- 1994-11-30 AU AU13323/95A patent/AU682426B2/en not_active Ceased
- 1994-11-30 EP EP95904768A patent/EP0733131B1/en not_active Expired - Lifetime
- 1994-11-30 AT AT95904768T patent/ATE156527T1/en not_active IP Right Cessation
- 1994-11-30 WO PCT/US1994/013725 patent/WO1995016064A1/en active IP Right Grant
-
1996
- 1996-03-20 FI FI961280A patent/FI961280A/en unknown
- 1996-06-07 NO NO962411A patent/NO962411D0/en unknown
Patent Citations (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPS5696914A (en) * | 1980-01-07 | 1981-08-05 | Teijin Ltd | Polyester monofilament and its production |
Non-Patent Citations (2)
Title |
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Class A, AN 81-68844D & JP,A,56 096 914 (TEIJIN KK) 5 August 1981 * |
DATABASE WPI Section Ch, Week 8138, Derwent Publications Ltd., London, GB; * |
Also Published As
Publication number | Publication date |
---|---|
NO962411L (en) | 1996-06-07 |
WO1995016064A1 (en) | 1995-06-15 |
CA2119904A1 (en) | 1995-06-09 |
CA2119904C (en) | 2000-12-12 |
DE69404862D1 (en) | 1997-09-11 |
AU1332395A (en) | 1995-06-27 |
NZ277927A (en) | 1997-01-29 |
EP0733131B1 (en) | 1997-08-06 |
FI961280A0 (en) | 1996-03-20 |
DE69404862T2 (en) | 1997-11-27 |
AU682426B2 (en) | 1997-10-02 |
NO962411D0 (en) | 1996-06-07 |
ATE156527T1 (en) | 1997-08-15 |
FI961280A (en) | 1996-03-20 |
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