CA2248268A1 - Process for forming articles directly from melt polymerization - Google Patents

Process for forming articles directly from melt polymerization Download PDF

Info

Publication number: CA2248268A1
Authority: CA; Canada
Prior art keywords: polyester; acetaldehyde; polymer; melt; ihv
Prior art date: 1996-03-01
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.): Abandoned

Application number

CA002248268A

Other languages

English (en)

French (fr)

Inventor

Billy Pat Evans

Benny Wayne Wright

Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)

Eastman Chemical Co

Original Assignee

Individual

Priority date (The priority date 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 date listed.)

1996-03-01

Filing date

1997-02-27

Publication date

1997-09-04

1997-02-27 Application filed by Individual filed Critical Individual

1997-09-04 Publication of CA2248268A1 publication Critical patent/CA2248268A1/en

Status Abandoned legal-status Critical Current

Links

238000000034 method Methods 0.000 title claims abstract description 54
238000006116 polymerization reaction Methods 0.000 title description 16
229920000728 polyester Polymers 0.000 claims abstract description 39
LYCAIKOWRPUZTN-UHFFFAOYSA-N Ethylene glycol Chemical compound OCCO LYCAIKOWRPUZTN-UHFFFAOYSA-N 0.000 claims abstract description 30
-1 alkyl dicarboxylic acids Chemical class 0.000 claims abstract description 13
239000000203 mixture Substances 0.000 claims abstract description 12
125000004432 carbon atom Chemical group C* 0.000 claims abstract description 11
WGCNASOHLSPBMP-UHFFFAOYSA-N hydroxyacetaldehyde Natural products OCC=O WGCNASOHLSPBMP-UHFFFAOYSA-N 0.000 claims abstract description 9
150000002334 glycols Chemical class 0.000 claims abstract description 6
OFOBLEOULBTSOW-UHFFFAOYSA-N Malonic acid Chemical compound OC(=O)CC(O)=O OFOBLEOULBTSOW-UHFFFAOYSA-N 0.000 claims abstract description 4
IKHGUXGNUITLKF-UHFFFAOYSA-N Acetaldehyde Chemical compound CC=O IKHGUXGNUITLKF-UHFFFAOYSA-N 0.000 claims description 134
229920000642 polymer Polymers 0.000 claims description 73
238000000465 moulding Methods 0.000 claims description 38
239000010409 thin film Substances 0.000 claims description 7
KKEYFWRCBNTPAC-UHFFFAOYSA-N Terephthalic acid Chemical compound OC(=O)C1=CC=C(C(O)=O)C=C1 KKEYFWRCBNTPAC-UHFFFAOYSA-N 0.000 claims description 4
KYTZHLUVELPASH-UHFFFAOYSA-N naphthalene-1,2-dicarboxylic acid Chemical compound C1=CC=CC2=C(C(O)=O)C(C(=O)O)=CC=C21 KYTZHLUVELPASH-UHFFFAOYSA-N 0.000 claims description 4
238000001746 injection moulding Methods 0.000 claims description 3
230000001172 regenerating effect Effects 0.000 claims description 3
ORLQHILJRHBSAY-UHFFFAOYSA-N [1-(hydroxymethyl)cyclohexyl]methanol Chemical compound OCC1(CO)CCCCC1 ORLQHILJRHBSAY-UHFFFAOYSA-N 0.000 claims description 2
229920000139 polyethylene terephthalate Polymers 0.000 description 26
239000005020 polyethylene terephthalate Substances 0.000 description 25
239000007787 solid Substances 0.000 description 18
239000000155 melt Substances 0.000 description 17
239000008188 pellet Substances 0.000 description 16
IJGRMHOSHXDMSA-UHFFFAOYSA-N Atomic nitrogen Chemical compound N#N IJGRMHOSHXDMSA-UHFFFAOYSA-N 0.000 description 14
238000006068 polycondensation reaction Methods 0.000 description 12
229910052757 nitrogen Inorganic materials 0.000 description 7
235000013361 beverage Nutrition 0.000 description 6
239000006227 byproduct Substances 0.000 description 6
238000002425 crystallisation Methods 0.000 description 6
230000008025 crystallization Effects 0.000 description 6
238000001914 filtration Methods 0.000 description 6
239000011261 inert gas Substances 0.000 description 6
238000007493 shaping process Methods 0.000 description 6
239000002253 acid Substances 0.000 description 5
238000009826 distribution Methods 0.000 description 5
239000000835 fiber Substances 0.000 description 5
239000012530 fluid Substances 0.000 description 5
IKHGUXGNUITLKF-XPULMUKRSA-N acetaldehyde Chemical group [14CH]([14CH3])=O IKHGUXGNUITLKF-XPULMUKRSA-N 0.000 description 4
239000003054 catalyst Substances 0.000 description 4
238000006243 chemical reaction Methods 0.000 description 4
239000010408 film Substances 0.000 description 4
239000007788 liquid Substances 0.000 description 4
238000002844 melting Methods 0.000 description 4
230000008018 melting Effects 0.000 description 4
238000012545 processing Methods 0.000 description 4
238000010926 purge Methods 0.000 description 4
XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 4
DNIAPMSPPWPWGF-UHFFFAOYSA-N Propylene glycol Chemical compound CC(O)CO DNIAPMSPPWPWGF-UHFFFAOYSA-N 0.000 description 3
YIMQCDZDWXUDCA-UHFFFAOYSA-N [4-(hydroxymethyl)cyclohexyl]methanol Chemical compound OCC1CCC(CO)CC1 YIMQCDZDWXUDCA-UHFFFAOYSA-N 0.000 description 3
150000007513 acids Chemical class 0.000 description 3
230000015572 biosynthetic process Effects 0.000 description 3
238000003795 desorption Methods 0.000 description 3
MTHSVFCYNBDYFN-UHFFFAOYSA-N diethylene glycol Chemical compound OCCOCCO MTHSVFCYNBDYFN-UHFFFAOYSA-N 0.000 description 3
238000001035 drying Methods 0.000 description 3
238000004519 manufacturing process Methods 0.000 description 3
239000000463 material Substances 0.000 description 3
238000010128 melt processing Methods 0.000 description 3
239000002243 precursor Substances 0.000 description 3
230000008929 regeneration Effects 0.000 description 3
238000011069 regeneration method Methods 0.000 description 3
239000003039 volatile agent Substances 0.000 description 3
QPFMBZIOSGYJDE-UHFFFAOYSA-N 1,1,2,2-tetrachloroethane Chemical compound ClC(Cl)C(Cl)Cl QPFMBZIOSGYJDE-UHFFFAOYSA-N 0.000 description 2
239000004677 Nylon Substances 0.000 description 2
229920002292 Nylon 6 Polymers 0.000 description 2
229920002302 Nylon 6,6 Polymers 0.000 description 2
238000004458 analytical method Methods 0.000 description 2
WERYXYBDKMZEQL-UHFFFAOYSA-N butane-1,4-diol Chemical compound OCCCCO WERYXYBDKMZEQL-UHFFFAOYSA-N 0.000 description 2
238000009833 condensation Methods 0.000 description 2
230000005494 condensation Effects 0.000 description 2
125000004122 cyclic group Chemical group 0.000 description 2
230000007547 defect Effects 0.000 description 2
238000010586 diagram Methods 0.000 description 2
239000000539 dimer Substances 0.000 description 2
238000010036 direct spinning Methods 0.000 description 2
230000008030 elimination Effects 0.000 description 2
238000003379 elimination reaction Methods 0.000 description 2
JBKVHLHDHHXQEQ-UHFFFAOYSA-N epsilon-caprolactam Chemical compound O=C1CCCCCN1 JBKVHLHDHHXQEQ-UHFFFAOYSA-N 0.000 description 2
238000001125 extrusion Methods 0.000 description 2
239000007789 gas Substances 0.000 description 2
238000010438 heat treatment Methods 0.000 description 2
229920001778 nylon Polymers 0.000 description 2
238000005453 pelletization Methods 0.000 description 2
238000002360 preparation method Methods 0.000 description 2
239000000047 product Substances 0.000 description 2
DNIAPMSPPWPWGF-VKHMYHEASA-N (+)-propylene glycol Chemical compound C[C@H](O)CO DNIAPMSPPWPWGF-VKHMYHEASA-N 0.000 description 1
YPFDHNVEDLHUCE-UHFFFAOYSA-N 1,3-propanediol Substances OCCCO YPFDHNVEDLHUCE-UHFFFAOYSA-N 0.000 description 1
RZVAJINKPMORJF-UHFFFAOYSA-N Acetaminophen Chemical compound CC(=O)NC1=CC=C(O)C=C1 RZVAJINKPMORJF-UHFFFAOYSA-N 0.000 description 1
FAIFRACTBXWXGY-JTTXIWGLSA-N COc1ccc2C[C@H]3N(C)CC[C@@]45[C@@H](Oc1c24)[C@@]1(OC)C=C[C@@]35C[C@@H]1[C@](C)(O)CCc1ccccc1 Chemical compound COc1ccc2C[C@H]3N(C)CC[C@@]45[C@@H](Oc1c24)[C@@]1(OC)C=C[C@@]35C[C@@H]1[C@](C)(O)CCc1ccccc1 FAIFRACTBXWXGY-JTTXIWGLSA-N 0.000 description 1
229920001634 Copolyester Polymers 0.000 description 1
239000004609 Impact Modifier Substances 0.000 description 1
ISWSIDIOOBJBQZ-UHFFFAOYSA-N Phenol Chemical compound OC1=CC=CC=C1 ISWSIDIOOBJBQZ-UHFFFAOYSA-N 0.000 description 1
OAICVXFJPJFONN-UHFFFAOYSA-N Phosphorus Chemical compound [P] OAICVXFJPJFONN-UHFFFAOYSA-N 0.000 description 1
HCHKCACWOHOZIP-UHFFFAOYSA-N Zinc Chemical compound [Zn] HCHKCACWOHOZIP-UHFFFAOYSA-N 0.000 description 1
ZVQOOHYFBIDMTQ-UHFFFAOYSA-N [methyl(oxido){1-[6-(trifluoromethyl)pyridin-3-yl]ethyl}-lambda(6)-sulfanylidene]cyanamide Chemical compound N#CN=S(C)(=O)C(C)C1=CC=C(C(F)(F)F)N=C1 ZVQOOHYFBIDMTQ-UHFFFAOYSA-N 0.000 description 1
238000009825 accumulation Methods 0.000 description 1
239000000654 additive Substances 0.000 description 1
239000003570 air Substances 0.000 description 1
229910000410 antimony oxide Inorganic materials 0.000 description 1
239000003963 antioxidant agent Substances 0.000 description 1
QVGXLLKOCUKJST-UHFFFAOYSA-N atomic oxygen Chemical compound [O] QVGXLLKOCUKJST-UHFFFAOYSA-N 0.000 description 1
150000001558 benzoic acid derivatives Chemical class 0.000 description 1
238000007664 blowing Methods 0.000 description 1
239000006085 branching agent Substances 0.000 description 1
229910052799 carbon Inorganic materials 0.000 description 1
239000012159 carrier gas Substances 0.000 description 1
230000015556 catabolic process Effects 0.000 description 1
PMMYEEVYMWASQN-IMJSIDKUSA-N cis-4-Hydroxy-L-proline Chemical compound O[C@@H]1CN[C@H](C(O)=O)C1 PMMYEEVYMWASQN-IMJSIDKUSA-N 0.000 description 1
150000001869 cobalt compounds Chemical class 0.000 description 1
239000003086 colorant Substances 0.000 description 1
238000001816 cooling Methods 0.000 description 1
229920001577 copolymer Polymers 0.000 description 1
239000007857 degradation product Substances 0.000 description 1
230000002939 deleterious effect Effects 0.000 description 1
238000013461 design Methods 0.000 description 1
JVLRYPRBKSMEBF-UHFFFAOYSA-K diacetyloxystibanyl acetate Chemical compound [Sb+3].CC([O-])=O.CC([O-])=O.CC([O-])=O JVLRYPRBKSMEBF-UHFFFAOYSA-K 0.000 description 1
125000000118 dimethyl group Chemical group [H]C([H])([H])* 0.000 description 1
PYBNTRWJKQJDRE-UHFFFAOYSA-L dodecanoate;tin(2+) Chemical compound [Sn+2].CCCCCCCCCCCC([O-])=O.CCCCCCCCCCCC([O-])=O PYBNTRWJKQJDRE-UHFFFAOYSA-L 0.000 description 1
238000005516 engineering process Methods 0.000 description 1
150000002148 esters Chemical class 0.000 description 1
238000010101 extrusion blow moulding Methods 0.000 description 1
239000000945 filler Substances 0.000 description 1
239000012467 final product Substances 0.000 description 1
238000004817 gas chromatography Methods 0.000 description 1
239000012760 heat stabilizer Substances 0.000 description 1
229920006158 high molecular weight polymer Polymers 0.000 description 1
238000002347 injection Methods 0.000 description 1
239000007924 injection Substances 0.000 description 1
UEGPKNKPLBYCNK-UHFFFAOYSA-L magnesium acetate Chemical class [Mg+2].CC([O-])=O.CC([O-])=O UEGPKNKPLBYCNK-UHFFFAOYSA-L 0.000 description 1
235000011285 magnesium acetate Nutrition 0.000 description 1
WPBNNNQJVZRUHP-UHFFFAOYSA-L manganese(2+);methyl n-[[2-(methoxycarbonylcarbamothioylamino)phenyl]carbamothioyl]carbamate;n-[2-(sulfidocarbothioylamino)ethyl]carbamodithioate Chemical compound [Mn+2].[S-]C(=S)NCCNC([S-])=S.COC(=O)NC(=S)NC1=CC=CC=C1NC(=S)NC(=O)OC WPBNNNQJVZRUHP-UHFFFAOYSA-L 0.000 description 1
239000011159 matrix material Substances 0.000 description 1
238000002074 melt spinning Methods 0.000 description 1
229910052751 metal Inorganic materials 0.000 description 1
239000002184 metal Substances 0.000 description 1
239000000178 monomer Substances 0.000 description 1
BDJRBEYXGGNYIS-UHFFFAOYSA-N nonanedioic acid Chemical compound OC(=O)CCCCCCCC(O)=O BDJRBEYXGGNYIS-UHFFFAOYSA-N 0.000 description 1
239000002667 nucleating agent Substances 0.000 description 1
VTRUBDSFZJNXHI-UHFFFAOYSA-N oxoantimony Chemical compound [Sb]=O VTRUBDSFZJNXHI-UHFFFAOYSA-N 0.000 description 1
229910052760 oxygen Inorganic materials 0.000 description 1
239000001301 oxygen Substances 0.000 description 1
238000004806 packaging method and process Methods 0.000 description 1
239000002245 particle Substances 0.000 description 1
229910052698 phosphorus Inorganic materials 0.000 description 1
239000011574 phosphorus Substances 0.000 description 1
239000000049 pigment Substances 0.000 description 1
239000004033 plastic Substances 0.000 description 1
229920003023 plastic Polymers 0.000 description 1
229920000515 polycarbonate Polymers 0.000 description 1
239000004417 polycarbonate Substances 0.000 description 1
229920000166 polytrimethylene carbonate Polymers 0.000 description 1
239000000843 powder Substances 0.000 description 1
239000011347 resin Substances 0.000 description 1
229920005989 resin Polymers 0.000 description 1
239000000243 solution Substances 0.000 description 1
238000010561 standard procedure Methods 0.000 description 1
238000012360 testing method Methods 0.000 description 1
238000005979 thermal decomposition reaction Methods 0.000 description 1
229920001169 thermoplastic Polymers 0.000 description 1
239000004416 thermosoftening plastic Substances 0.000 description 1
239000010936 titanium Substances 0.000 description 1
229910052719 titanium Inorganic materials 0.000 description 1
238000012546 transfer Methods 0.000 description 1
239000011701 zinc Substances 0.000 description 1
229910052725 zinc Inorganic materials 0.000 description 1

Classifications

- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08G—MACROMOLECULAR COMPOUNDS OBTAINED OTHERWISE THAN BY REACTIONS ONLY INVOLVING UNSATURATED CARBON-TO-CARBON BONDS
- C08G63/00—Macromolecular compounds obtained by reactions forming a carboxylic ester link in the main chain of the macromolecule
- C08G63/78—Preparation processes
- B—PERFORMING OPERATIONS; TRANSPORTING
- B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
- B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
- B29C45/00—Injection moulding, i.e. forcing the required volume of moulding material through a nozzle into a closed mould; Apparatus therefor
- B29C45/17—Component parts, details or accessories; Auxiliary operations
- B29C45/18—Feeding the material into the injection moulding apparatus, i.e. feeding the non-plastified material into the injection unit
- B29C2045/1883—Feeding the material into the injection moulding apparatus, i.e. feeding the non-plastified material into the injection unit directly injecting moulding material from the chemical production plant into the mould without granulating
- B—PERFORMING OPERATIONS; TRANSPORTING
- B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
- B29K—INDEXING SCHEME ASSOCIATED WITH SUBCLASSES B29B, B29C OR B29D, RELATING TO MOULDING MATERIALS OR TO MATERIALS FOR MOULDS, REINFORCEMENTS, FILLERS OR PREFORMED PARTS, e.g. INSERTS
- B29K2105/00—Condition, form or state of moulded material or of the material to be shaped
- B29K2105/0002—Condition, form or state of moulded material or of the material to be shaped monomers or prepolymers

Landscapes

Chemical & Material Sciences (AREA)
Health & Medical Sciences (AREA)
Chemical Kinetics & Catalysis (AREA)
Medicinal Chemistry (AREA)
Polymers & Plastics (AREA)
Organic Chemistry (AREA)
Polyesters Or Polycarbonates (AREA)
Manufacture Of Macromolecular Shaped Articles (AREA)

CA002248268A 1996-03-01 1997-02-27 Process for forming articles directly from melt polymerization Abandoned CA2248268A1 (en)

Applications Claiming Priority (2)

Application Number	Priority Date	Filing Date	Title
US60919796A	1996-03-01	1996-03-01
US08/609,197		1996-03-01

Publications (1)

Publication Number	Publication Date
CA2248268A1 true CA2248268A1 (en)	1997-09-04

Family

ID=24439751

Family Applications (1)

Application Number	Title	Priority Date	Filing Date
CA002248268A Abandoned CA2248268A1 (en)	1996-03-01	1997-02-27	Process for forming articles directly from melt polymerization

Country Status (11)

Country	Link
EP (1)	EP0883643A1 (id)
JP (1)	JP2000506199A (id)
CN (1)	CN1217002A (id)
AR (1)	AR006022A1 (id)
AU (1)	AU1977797A (id)
CA (1)	CA2248268A1 (id)
CO (1)	CO4560470A1 (id)
ID (1)	ID16094A (id)
PL (1)	PL328606A1 (id)
WO (1)	WO1997031968A1 (id)
ZA (1)	ZA971744B (id)

Families Citing this family (11)

* Cited by examiner, † Cited by third party
Publication number	Priority date	Publication date	Assignee	Title
US6099778A (en) *	1996-10-28	2000-08-08	Eastman Chemical Company	Process for producing pet articles with low acetaldehyde
DE10045719B4 (de) *	2000-09-15	2018-01-11	Inventa-Fischer Gmbh & Co. Kg	Verfahren zur Herstellung von Polyestern mit reduziertem Gehalt an Acetaldehyd
US6762275B1 (en)	2003-05-27	2004-07-13	The Coca-Cola Company	Method to decrease the acetaldehyde content of melt-processed polyesters
US20050029712A1 (en) *	2003-08-05	2005-02-10	Nahill Thomas E.	Continuous production of container preforms
US7329723B2 (en)	2003-09-18	2008-02-12	Eastman Chemical Company	Thermal crystallization of polyester pellets in liquid
RU2323947C2 (ru) *	2003-10-10	2008-05-10	Асахи Касеи Кемикалз Корпорейшн	Способ получения полиалкилентерефталата, способ получения формованного изделия из полиалкилентерефталата и формованное изделие из полиалкилентерефталата
CA2482056A1 (en)	2003-10-10	2005-04-10	Eastman Chemical Company	Thermal crystallization of a molten polyester polymer in a fluid
JP4744450B2 (ja)	2004-11-30	2011-08-10	旭化成ケミカルズ株式会社	ポリエステル樹脂、その成形体及びそれらの製造方法
RU2360798C2 (ru) *	2004-11-30	2009-07-10	Асахи Касеи Кемикалз Корпорейшн	Способ и устройство для получения формованного продукта
EP1829912A4 (en)	2004-11-30	2012-07-25	Asahi Kasei Chemicals Corp	METHOD AND DEVICE FOR PRODUCING A FORM BODY
JP4770265B2 (ja) *	2005-05-18	2011-09-14	東洋製罐株式会社	溶融重合・圧縮成形システム

Family Cites Families (2)

* Cited by examiner, † Cited by third party
Publication number	Priority date	Publication date	Assignee	Title
US3654231A (en) *	1970-06-29	1972-04-04	Eastman Kodak Co	Manufacture of extruded superpolyester products
US4675378A (en) *	1986-05-19	1987-06-23	Celanese Corporation	Process control system

1997
- 1997-02-26 ID IDP970576A patent/ID16094A/id unknown
- 1997-02-27 AR ARP970100787A patent/AR006022A1/es unknown
- 1997-02-27 CN CN97194115A patent/CN1217002A/zh active Pending
- 1997-02-27 EP EP97907893A patent/EP0883643A1/en not_active Withdrawn
- 1997-02-27 WO PCT/US1997/003037 patent/WO1997031968A1/en not_active Ceased
- 1997-02-27 AU AU19777/97A patent/AU1977797A/en not_active Abandoned
- 1997-02-27 PL PL97328606A patent/PL328606A1/xx unknown
- 1997-02-27 JP JP9531102A patent/JP2000506199A/ja active Pending
- 1997-02-27 CA CA002248268A patent/CA2248268A1/en not_active Abandoned
- 1997-02-27 ZA ZA9701744A patent/ZA971744B/xx unknown
- 1997-02-28 CO CO97010919A patent/CO4560470A1/es unknown

Also Published As

Publication number	Publication date
EP0883643A1 (en)	1998-12-16
CO4560470A1 (es)	1998-02-10
ID16094A (id)	1997-09-04
AR006022A1 (es)	1999-07-21
AU1977797A (en)	1997-09-16
CN1217002A (zh)	1999-05-19
JP2000506199A (ja)	2000-05-23
ZA971744B (en)	1997-09-04
WO1997031968A1 (en)	1997-09-04
PL328606A1 (en)	1999-02-01

Legal Events

Date	Code	Title	Description
1998-08-28	EEER	Examination request
2001-02-27	FZDE	Dead

Publication	Publication Date	Title
EP0842210B1 (en)	2002-02-13	Process for producing polyester articles having low acetaldehyde content
US6099778A (en)	2000-08-08	Process for producing pet articles with low acetaldehyde
US5597891A (en)	1997-01-28	Process for producing polyester articles having low acetaldehyde content
EP0968243B1 (en)	2002-07-03	Apparatus and method for molding polyester articles having low acetaldehyde content directly from the melt formation using flash tank devolatilization
MXPA98000877A (en)	1998-04-01	Process to produce polyester articles with low acetaldeh content
US8202591B2 (en)	2012-06-19	Polyester resin, molded object thereof, and processes for producing these
CN102971358B (zh)	2016-03-16	用于挤出吹塑的超高iv聚酯及其生产方法
CN1082432C (zh)	2002-04-10	直接由熔体成型聚酯制件的装置和方法
CN100362038C (zh)	2008-01-16	高度缩合的聚酯颗粒的制备方法
MXPA98000876A (en)	1998-04-01	Process for the production of polyester articles with low content of acetaldeh
AU6764098A (en)	1998-10-12	Process for continuously producing polyester articles with scrap recycle in a continuous melt-to-preform process
CA2248268A1 (en)	1997-09-04	Process for forming articles directly from melt polymerization
TWI327579B (en)	2010-07-21	Method and device to reduce the acetaldehyde content of polyester granulate
Wadekar et al.	2009	Recent developments in solid state polymerization of poly (ethylene terephthalate)
CN121969688A (zh)	2026-05-01	具有改进的跌落冲击的改性共聚酯、其制备方法和由其制备的模制品
CN119894655A (zh)	2025-04-25	预制件的制造方法和预制件
MXPA99008561A (es)	2000-02-02	Metodo y aparato para moldear articulos de poliester que tienen bajo contenido de acetaldehido directamente de la formacion del fundido al utilizar desvolatilizacion de tanque de vaporizacion instantanea