CN110643156A - PET film blowing bag and preparation method thereof - Google Patents
PET film blowing bag and preparation method thereof Download PDFInfo
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- CN110643156A CN110643156A CN201911057866.5A CN201911057866A CN110643156A CN 110643156 A CN110643156 A CN 110643156A CN 201911057866 A CN201911057866 A CN 201911057866A CN 110643156 A CN110643156 A CN 110643156A
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- antioxidant
- coupling agent
- film blowing
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- 238000010096 film blowing Methods 0.000 title claims abstract description 64
- 229920002799 BoPET Polymers 0.000 title claims abstract description 37
- 238000002360 preparation method Methods 0.000 title abstract description 14
- 229920000139 polyethylene terephthalate Polymers 0.000 claims abstract description 121
- 239000005020 polyethylene terephthalate Substances 0.000 claims abstract description 121
- KRKNYBCHXYNGOX-UHFFFAOYSA-N citric acid Chemical compound OC(=O)CC(O)(C(O)=O)CC(O)=O KRKNYBCHXYNGOX-UHFFFAOYSA-N 0.000 claims abstract description 81
- LYCAIKOWRPUZTN-UHFFFAOYSA-N Ethylene glycol Chemical compound OCCO LYCAIKOWRPUZTN-UHFFFAOYSA-N 0.000 claims abstract description 79
- 229920005989 resin Polymers 0.000 claims abstract description 61
- 239000011347 resin Substances 0.000 claims abstract description 61
- VTYYLEPIZMXCLO-UHFFFAOYSA-L Calcium carbonate Chemical compound [Ca+2].[O-]C([O-])=O VTYYLEPIZMXCLO-UHFFFAOYSA-L 0.000 claims abstract description 58
- KKEYFWRCBNTPAC-UHFFFAOYSA-N Terephthalic acid Chemical compound OC(=O)C1=CC=C(C(O)=O)C=C1 KKEYFWRCBNTPAC-UHFFFAOYSA-N 0.000 claims abstract description 52
- JOLVYUIAMRUBRK-UHFFFAOYSA-N 11',12',14',15'-Tetradehydro(Z,Z-)-3-(8-Pentadecenyl)phenol Natural products OC1=CC=CC(CCCCCCCC=CCC=CCC=C)=C1 JOLVYUIAMRUBRK-UHFFFAOYSA-N 0.000 claims abstract description 42
- YLKVIMNNMLKUGJ-UHFFFAOYSA-N 3-Delta8-pentadecenylphenol Natural products CCCCCCC=CCCCCCCCC1=CC=CC(O)=C1 YLKVIMNNMLKUGJ-UHFFFAOYSA-N 0.000 claims abstract description 42
- JOLVYUIAMRUBRK-UTOQUPLUSA-N Cardanol Chemical compound OC1=CC=CC(CCCCCCC\C=C/C\C=C/CC=C)=C1 JOLVYUIAMRUBRK-UTOQUPLUSA-N 0.000 claims abstract description 42
- FAYVLNWNMNHXGA-UHFFFAOYSA-N Cardanoldiene Natural products CCCC=CCC=CCCCCCCCC1=CC=CC(O)=C1 FAYVLNWNMNHXGA-UHFFFAOYSA-N 0.000 claims abstract description 42
- PTFIPECGHSYQNR-UHFFFAOYSA-N cardanol Natural products CCCCCCCCCCCCCCCC1=CC=CC(O)=C1 PTFIPECGHSYQNR-UHFFFAOYSA-N 0.000 claims abstract description 42
- 239000007822 coupling agent Substances 0.000 claims abstract description 37
- 229920000728 polyester Polymers 0.000 claims abstract description 34
- 229920000747 poly(lactic acid) Polymers 0.000 claims abstract description 31
- 239000004626 polylactic acid Substances 0.000 claims abstract description 31
- 239000003963 antioxidant agent Substances 0.000 claims abstract description 30
- 230000003078 antioxidant effect Effects 0.000 claims abstract description 30
- 229910000019 calcium carbonate Inorganic materials 0.000 claims abstract description 29
- 239000002994 raw material Substances 0.000 claims abstract description 29
- 239000002250 absorbent Substances 0.000 claims abstract description 27
- 230000002745 absorbent Effects 0.000 claims abstract description 27
- 239000012752 auxiliary agent Substances 0.000 claims abstract description 18
- 239000003054 catalyst Substances 0.000 claims abstract description 18
- 238000010438 heat treatment Methods 0.000 claims abstract description 17
- 238000000034 method Methods 0.000 claims abstract description 12
- -1 polyethylene terephthalate Polymers 0.000 claims abstract description 12
- 238000006068 polycondensation reaction Methods 0.000 claims abstract description 11
- 238000006116 polymerization reaction Methods 0.000 claims abstract description 11
- 230000032050 esterification Effects 0.000 claims abstract description 9
- 238000005886 esterification reaction Methods 0.000 claims abstract description 9
- 238000003756 stirring Methods 0.000 claims abstract description 9
- VMHLLURERBWHNL-UHFFFAOYSA-M Sodium acetate Chemical compound [Na+].CC([O-])=O VMHLLURERBWHNL-UHFFFAOYSA-M 0.000 claims abstract description 5
- 229940040526 anhydrous sodium acetate Drugs 0.000 claims abstract description 5
- 229920003023 plastic Polymers 0.000 claims description 29
- 239000004033 plastic Substances 0.000 claims description 29
- 238000005520 cutting process Methods 0.000 claims description 17
- ADCOVFLJGNWWNZ-UHFFFAOYSA-N antimony trioxide Chemical compound O=[Sb]O[Sb]=O ADCOVFLJGNWWNZ-UHFFFAOYSA-N 0.000 claims description 12
- 238000001816 cooling Methods 0.000 claims description 8
- 238000002156 mixing Methods 0.000 claims description 8
- RTAQQCXQSZGOHL-UHFFFAOYSA-N Titanium Chemical compound [Ti] RTAQQCXQSZGOHL-UHFFFAOYSA-N 0.000 claims description 6
- 229940011182 cobalt acetate Drugs 0.000 claims description 6
- QAHREYKOYSIQPH-UHFFFAOYSA-L cobalt(II) acetate Chemical compound [Co+2].CC([O-])=O.CC([O-])=O QAHREYKOYSIQPH-UHFFFAOYSA-L 0.000 claims description 6
- 239000006087 Silane Coupling Agent Substances 0.000 claims description 4
- WSXIMVDZMNWNRF-UHFFFAOYSA-N antimony;ethane-1,2-diol Chemical compound [Sb].OCCO WSXIMVDZMNWNRF-UHFFFAOYSA-N 0.000 claims description 4
- ZNCPFRVNHGOPAG-UHFFFAOYSA-L sodium oxalate Chemical compound [Na+].[Na+].[O-]C(=O)C([O-])=O ZNCPFRVNHGOPAG-UHFFFAOYSA-L 0.000 claims description 4
- 229940039790 sodium oxalate Drugs 0.000 claims description 4
- 239000001488 sodium phosphate Substances 0.000 claims description 4
- 229910000162 sodium phosphate Inorganic materials 0.000 claims description 4
- RYFMWSXOAZQYPI-UHFFFAOYSA-K trisodium phosphate Chemical compound [Na+].[Na+].[Na+].[O-]P([O-])([O-])=O RYFMWSXOAZQYPI-UHFFFAOYSA-K 0.000 claims description 4
- VSAWBBYYMBQKIK-UHFFFAOYSA-N 4-[[3,5-bis[(3,5-ditert-butyl-4-hydroxyphenyl)methyl]-2,4,6-trimethylphenyl]methyl]-2,6-ditert-butylphenol Chemical compound CC1=C(CC=2C=C(C(O)=C(C=2)C(C)(C)C)C(C)(C)C)C(C)=C(CC=2C=C(C(O)=C(C=2)C(C)(C)C)C(C)(C)C)C(C)=C1CC1=CC(C(C)(C)C)=C(O)C(C(C)(C)C)=C1 VSAWBBYYMBQKIK-UHFFFAOYSA-N 0.000 claims description 3
- UIIMBOGNXHQVGW-DEQYMQKBSA-M Sodium bicarbonate-14C Chemical compound [Na+].O[14C]([O-])=O UIIMBOGNXHQVGW-DEQYMQKBSA-M 0.000 claims description 3
- BGYHLZZASRKEJE-UHFFFAOYSA-N [3-[3-(3,5-ditert-butyl-4-hydroxyphenyl)propanoyloxy]-2,2-bis[3-(3,5-ditert-butyl-4-hydroxyphenyl)propanoyloxymethyl]propyl] 3-(3,5-ditert-butyl-4-hydroxyphenyl)propanoate Chemical compound CC(C)(C)C1=C(O)C(C(C)(C)C)=CC(CCC(=O)OCC(COC(=O)CCC=2C=C(C(O)=C(C=2)C(C)(C)C)C(C)(C)C)(COC(=O)CCC=2C=C(C(O)=C(C=2)C(C)(C)C)C(C)(C)C)COC(=O)CCC=2C=C(C(O)=C(C=2)C(C)(C)C)C(C)(C)C)=C1 BGYHLZZASRKEJE-UHFFFAOYSA-N 0.000 claims description 3
- XGULBQUJRQPLOG-OOOULUNWSA-N O([C@@H]1[C@@H](C)[C@H](O)CC(=O)O[C@@H]([C@H](/C=C(\C)/C=C/C(=O)[C@H](C)C[C@@H]1CC=O)COCC=1C=CC=CC=1)CC)[C@@H]1O[C@H](C)[C@@H](O)[C@H](N(C)C)[C@H]1O Chemical compound O([C@@H]1[C@@H](C)[C@H](O)CC(=O)O[C@@H]([C@H](/C=C(\C)/C=C/C(=O)[C@H](C)C[C@@H]1CC=O)COCC=1C=CC=CC=1)CC)[C@@H]1O[C@H](C)[C@@H](O)[C@H](N(C)C)[C@H]1O XGULBQUJRQPLOG-OOOULUNWSA-N 0.000 claims description 2
- WGCNASOHLSPBMP-UHFFFAOYSA-N hydroxyacetaldehyde Natural products OCC=O WGCNASOHLSPBMP-UHFFFAOYSA-N 0.000 claims description 2
- 229940071125 manganese acetate Drugs 0.000 claims description 2
- UOGMEBQRZBEZQT-UHFFFAOYSA-L manganese(2+);diacetate Chemical compound [Mn+2].CC([O-])=O.CC([O-])=O UOGMEBQRZBEZQT-UHFFFAOYSA-L 0.000 claims description 2
- SSDSCDGVMJFTEQ-UHFFFAOYSA-N octadecyl 3-(3,5-ditert-butyl-4-hydroxyphenyl)propanoate Chemical compound CCCCCCCCCCCCCCCCCCOC(=O)CCC1=CC(C(C)(C)C)=C(O)C(C(C)(C)C)=C1 SSDSCDGVMJFTEQ-UHFFFAOYSA-N 0.000 claims description 2
- HHDOORYZQSEMGM-UHFFFAOYSA-L potassium;oxalate;titanium(4+) Chemical compound [K+].[Ti+4].[O-]C(=O)C([O-])=O HHDOORYZQSEMGM-UHFFFAOYSA-L 0.000 claims description 2
- 239000010936 titanium Substances 0.000 claims description 2
- 229910052719 titanium Inorganic materials 0.000 claims description 2
- 239000006096 absorbing agent Substances 0.000 claims 7
- RNFJDJUURJAICM-UHFFFAOYSA-N 2,2,4,4,6,6-hexaphenoxy-1,3,5-triaza-2$l^{5},4$l^{5},6$l^{5}-triphosphacyclohexa-1,3,5-triene Chemical compound N=1P(OC=2C=CC=CC=2)(OC=2C=CC=CC=2)=NP(OC=2C=CC=CC=2)(OC=2C=CC=CC=2)=NP=1(OC=1C=CC=CC=1)OC1=CC=CC=C1 RNFJDJUURJAICM-UHFFFAOYSA-N 0.000 abstract description 7
- 239000003063 flame retardant Substances 0.000 abstract description 7
- 231100000956 nontoxicity Toxicity 0.000 abstract description 3
- 230000000052 comparative effect Effects 0.000 description 13
- 230000006872 improvement Effects 0.000 description 7
- 239000000463 material Substances 0.000 description 7
- 230000004048 modification Effects 0.000 description 7
- 238000012986 modification Methods 0.000 description 7
- 238000009472 formulation Methods 0.000 description 4
- 239000000203 mixture Substances 0.000 description 4
- 229920002907 Guar gum Polymers 0.000 description 3
- 230000009286 beneficial effect Effects 0.000 description 3
- 230000015572 biosynthetic process Effects 0.000 description 3
- 238000000071 blow moulding Methods 0.000 description 3
- 239000001913 cellulose Substances 0.000 description 3
- 229920002678 cellulose Polymers 0.000 description 3
- 239000000665 guar gum Substances 0.000 description 3
- 229960002154 guar gum Drugs 0.000 description 3
- 235000010417 guar gum Nutrition 0.000 description 3
- 230000003000 nontoxic effect Effects 0.000 description 3
- 238000012360 testing method Methods 0.000 description 3
- UIIMBOGNXHQVGW-UHFFFAOYSA-M Sodium bicarbonate Chemical compound [Na+].OC([O-])=O UIIMBOGNXHQVGW-UHFFFAOYSA-M 0.000 description 2
- 238000010521 absorption reaction Methods 0.000 description 2
- 239000003674 animal food additive Substances 0.000 description 2
- 238000007664 blowing Methods 0.000 description 2
- 238000006482 condensation reaction Methods 0.000 description 2
- 238000007865 diluting Methods 0.000 description 2
- 239000003822 epoxy resin Substances 0.000 description 2
- KRXBVZUTZPDWQI-UHFFFAOYSA-N ethane-1,2-diol;titanium Chemical compound [Ti].OCCO KRXBVZUTZPDWQI-UHFFFAOYSA-N 0.000 description 2
- 230000003287 optical effect Effects 0.000 description 2
- 229920000647 polyepoxide Polymers 0.000 description 2
- 238000012545 processing Methods 0.000 description 2
- 238000003786 synthesis reaction Methods 0.000 description 2
- XAGFODPZIPBFFR-UHFFFAOYSA-N aluminium Chemical compound [Al] XAGFODPZIPBFFR-UHFFFAOYSA-N 0.000 description 1
- 229910052782 aluminium Inorganic materials 0.000 description 1
- 239000013078 crystal Substances 0.000 description 1
- 239000011888 foil Substances 0.000 description 1
- 229920006262 high density polyethylene film Polymers 0.000 description 1
- 238000004519 manufacturing process Methods 0.000 description 1
- 238000004806 packaging method and process Methods 0.000 description 1
- WXZMFSXDPGVJKK-UHFFFAOYSA-N pentaerythritol Chemical compound OCC(CO)(CO)CO WXZMFSXDPGVJKK-UHFFFAOYSA-N 0.000 description 1
- 238000011056 performance test Methods 0.000 description 1
- 229920001707 polybutylene terephthalate Polymers 0.000 description 1
- 229920001225 polyester resin Polymers 0.000 description 1
- 239000004645 polyester resin Substances 0.000 description 1
- 230000008569 process Effects 0.000 description 1
- 229920006395 saturated elastomer Polymers 0.000 description 1
- 238000007789 sealing Methods 0.000 description 1
- 229910000030 sodium bicarbonate Inorganic materials 0.000 description 1
- 235000017557 sodium bicarbonate Nutrition 0.000 description 1
- 230000002195 synergetic effect Effects 0.000 description 1
- 229920001169 thermoplastic Polymers 0.000 description 1
- 239000004416 thermosoftening plastic Substances 0.000 description 1
Classifications
-
- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08J—WORKING-UP; GENERAL PROCESSES OF COMPOUNDING; AFTER-TREATMENT NOT COVERED BY SUBCLASSES C08B, C08C, C08F, C08G or C08H
- C08J5/00—Manufacture of articles or shaped materials containing macromolecular substances
- C08J5/18—Manufacture of films or sheets
-
- 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
- C08G63/02—Polyesters derived from hydroxycarboxylic acids or from polycarboxylic acids and polyhydroxy compounds
- C08G63/12—Polyesters derived from hydroxycarboxylic acids or from polycarboxylic acids and polyhydroxy compounds derived from polycarboxylic acids and polyhydroxy compounds
- C08G63/16—Dicarboxylic acids and dihydroxy compounds
- C08G63/20—Polyesters having been prepared in the presence of compounds having one reactive group or more than two reactive groups
- C08G63/21—Polyesters having been prepared in the presence of compounds having one reactive group or more than two reactive groups in the presence of unsaturated monocarboxylic acids or unsaturated monohydric alcohols or reactive derivatives thereof
-
- 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
- C08G63/82—Preparation processes characterised by the catalyst used
- C08G63/85—Germanium, tin, lead, arsenic, antimony, bismuth, titanium, zirconium, hafnium, vanadium, niobium, tantalum, or compounds thereof
-
- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08J—WORKING-UP; GENERAL PROCESSES OF COMPOUNDING; AFTER-TREATMENT NOT COVERED BY SUBCLASSES C08B, C08C, C08F, C08G or C08H
- C08J2367/00—Characterised by the use of polyesters obtained by reactions forming a carboxylic ester link in the main chain; Derivatives of such polymers
- C08J2367/02—Polyesters derived from dicarboxylic acids and dihydroxy compounds
-
- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08J—WORKING-UP; GENERAL PROCESSES OF COMPOUNDING; AFTER-TREATMENT NOT COVERED BY SUBCLASSES C08B, C08C, C08F, C08G or C08H
- C08J2467/00—Characterised by the use of polyesters obtained by reactions forming a carboxylic ester link in the main chain; Derivatives of such polymers
- C08J2467/04—Polyesters derived from hydroxy carboxylic acids, e.g. lactones
-
- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08K—Use of inorganic or non-macromolecular organic substances as compounding ingredients
- C08K3/00—Use of inorganic substances as compounding ingredients
- C08K3/18—Oxygen-containing compounds, e.g. metal carbonyls
- C08K3/24—Acids; Salts thereof
- C08K3/26—Carbonates; Bicarbonates
- C08K2003/265—Calcium, strontium or barium carbonate
Landscapes
- Chemical & Material Sciences (AREA)
- Health & Medical Sciences (AREA)
- Chemical Kinetics & Catalysis (AREA)
- Medicinal Chemistry (AREA)
- Polymers & Plastics (AREA)
- Organic Chemistry (AREA)
- Engineering & Computer Science (AREA)
- Manufacturing & Machinery (AREA)
- Materials Engineering (AREA)
- Compositions Of Macromolecular Compounds (AREA)
- Polyesters Or Polycarbonates (AREA)
Abstract
The invention provides a PET film blowing bag which is prepared from the following raw materials: modified PET resin, an antioxidant, an ultraviolet absorbent and calcium carbonate; the modified PET resin is prepared from the following raw materials: cardanol, terephthalic acid, ethylene glycol, citric acid, an auxiliary agent, a catalyst, polylactic acid and a coupling agent; the modified PET resin is prepared by the following method: s1, adding terephthalic acid, ethylene glycol, citric acid, a catalyst and an auxiliary agent anhydrous sodium acetate into a polymerization kettle to perform pressure esterification and polycondensation reaction to obtain PET polyester; s2, heating cardanol, polylactic acid and a coupling agent to 70 ℃, uniformly stirring, adding the cardanol, polylactic acid and coupling agent into PET (polyethylene terephthalate) polyester, reacting for 2-3h, and granulating to obtain the modified PET resin. The preparation method is simple, and the prepared PET blown film bag has the advantages of good toughness, good flame retardant property, stable film forming property, safety, no toxicity and wide application prospect.
Description
Technical Field
The invention relates to the technical field of film blowing bags, in particular to a PET film blowing bag and a preparation method thereof.
Background
When plastic bags are produced, the technique of blow molding is used. The processing process comprises the steps of carrying out blow molding by using a flat film blowing machine, flattening the cylindrical film by using a propeller strut, continuously stretching out the blown film, cutting, sealing and the like, thereby forming the plastic bag.
If some plastic bags need to be processed, for example, chinese patent No. CN2644328 discloses a vertical packaging bag, the bottom of which can be folded into the plastic bag. When the plastic is produced, the air nozzle is directly used for blowing the cylindrical film out of a concave part after blow molding, and then the herringbone frame is used for flattening, so that the bottom of the cut plastic bag can be ensured to have a bent and folded structure.
However, in the production method of blowing the plastic bag by using the air nozzle, the degree of inward concave of the processed film has certain instability, and the degree of inward concave of the produced plastic bag is inconsistent when the film is disturbed by external air flow.
PET plastics, PET or PETP for short, are poly terephthalic acid plastics, mainly comprise polyethylene terephthalate PET and polybutylene terephthalate PET. Polyethylene terephthalate is also commonly referred to as polyester resin. It is a polycondensate of terephthalic acid and ethylene glycol, collectively known as thermoplastic polyester, or saturated polyester, with PET. Has certain crystal orientation capability, thus having higher film forming property and formation property. The PET plastic has good optical performance and weather resistance, and the amorphous PET plastic has good optical transparency. The tensile strength of PET film is very high, comparable to aluminum foil, 9 times that of HDPE film and 3 times that of PC and PA films. The reinforced PET has small creep property, excellent fatigue resistance (better than reinforced PC and PA), and good wear resistance and friction resistance. The mechanical properties of PET are less affected by temperature. Therefore, the PET plastic has good film forming performance when being subjected to film blowing processing, and the obtained film blowing bag is uniform and stable.
Disclosure of Invention
In order to solve the technical problems, the invention provides a PET film blowing bag and a preparation method thereof, and aims to provide the PET film blowing bag which is modified by adopting natural components, has safe, degradable and nontoxic properties and can be widely applied.
The invention provides a PET film blowing bag which is prepared from the following raw materials: modified PET resin, an antioxidant, an ultraviolet absorbent and calcium carbonate;
the modified PET resin is prepared from the following raw materials: cardanol, terephthalic acid, ethylene glycol, citric acid, an auxiliary agent, a catalyst, polylactic acid and a coupling agent;
the modified PET resin is prepared by the following method:
s1, adding terephthalic acid, ethylene glycol, citric acid, a catalyst and an auxiliary agent into a polymerization kettle to perform pressure esterification and polycondensation reaction to obtain PET polyester;
the number average molecular weight of the PET polyester is 21000-25000, and the viscosity is 3000-5000 cp;
s2, heating cardanol, polylactic acid and a coupling agent to 70 ℃, uniformly stirring, adding the cardanol, polylactic acid and coupling agent into PET (polyethylene terephthalate) polyester, reacting for 2-3h, and granulating to obtain the modified PET resin.
As a further improvement of the invention, the health-care food is prepared from the following raw materials in parts by weight: the health-care food is prepared from the following raw materials in parts by weight: 100-150 parts of modified PET resin, 1-4 parts of antioxidant, 2-5 parts of ultraviolet absorbent and 10-15 parts of calcium carbonate;
the modified PET resin is prepared from the following raw materials in parts by weight: 5-10 parts of cardanol, 100-200 parts of terephthalic acid, 100-200 parts of ethylene glycol, 5-10 parts of citric acid, 1-2 parts of an auxiliary agent, 1-3 parts of a catalyst, 20-30 parts of polylactic acid and 1-3 parts of a coupling agent.
Preferably, the feed additive is prepared from the following raw materials in parts by weight: 120-130 parts of modified PET resin, 1-3 parts of antioxidant, 3-5 parts of ultraviolet absorbent and 12-14 parts of calcium carbonate;
the modified PET resin is prepared from the following raw materials in parts by weight: 6-9 parts of cardanol, 180 parts of terephthalic acid, 180 parts of ethylene glycol, 6-9 parts of citric acid, 1.2-1.7 parts of an auxiliary agent, 1-2 parts of a catalyst, 22-27 parts of polylactic acid and 2-3 parts of a coupling agent.
Preferably, the feed additive is prepared from the following raw materials in parts by weight: 125 parts of modified PET resin, 2 parts of antioxidant, 4 parts of ultraviolet absorbent and 13 parts of calcium carbonate;
the modified PET resin is prepared from the following raw materials in parts by weight: 7 parts of cardanol, 150 parts of terephthalic acid, 150 parts of ethylene glycol, 7 parts of citric acid, 1.5 parts of an auxiliary agent, 1.2 parts of a catalyst, 25 parts of polylactic acid and 2.7 parts of a coupling agent.
As a further modification of the invention, the catalyst is selected from one or more of antimony trioxide, ethylene glycol antimony, cobalt acetate, manganese acetate, titanium potassium oxalate and ethylene glycol titanium.
As a further modification of the invention, the auxiliary agent is one or more selected from anhydrous sodium acetate, anhydrous calcium carbonate, anhydrous sodium bicarbonate, anhydrous sodium phosphate and anhydrous sodium oxalate.
As a further improvement of the invention, the antioxidant is one or more selected from antioxidant 1010, antioxidant 3114, antioxidant 1076, antioxidant 330, antioxidant 300, antioxidant 405 and antioxidant 445.
As a further improvement of the invention, the ultraviolet absorbent is selected from one or more of ultraviolet absorbent UV-9, ultraviolet absorbent UV-531, ultraviolet absorbent UV-326, ultraviolet absorbent UV-0, ultraviolet absorbent UV-1130 and ultraviolet absorbent UV-327.
As a further improvement of the invention, the coupling agent is a silane coupling agent or a titanate coupling agent.
As a further improvement of the invention, the titanate coupling agent is selected from one or more of TMC-102, TMC-201, TMC-101, TMC-105 and TMC-311.
As a further improvement of the invention, the silane coupling agent is selected from one or more of KH550, KH560, KH570, KH792, DL602 and DL 171.
The invention further provides a preparation method of the PET film blowing bag, which comprises the following steps:
s1, preparing plastic: adding the modified PET resin, the antioxidant, the ultraviolet absorbent and the calcium carbonate into a mixer, heating to the temperature of 100 ℃ and 120 ℃, mixing for 2-3h, and cooling to room temperature;
s2, preparing a PET film blowing bag: and (5) adding the plastic obtained in the step (S1) into a film blowing machine for film blowing, and cutting by using a hot cutting blade after film blowing to obtain the PET film blowing bag.
The invention has the following beneficial effects:
according to the invention, citric acid is added for modification in the condensation reaction of terephthalic acid and ethylene glycol, which is beneficial to improving the molecular weight and viscosity of polyester, and has good thermal properties, and the polycondensation rate is accelerated in the polymerization process;
according to the invention, cardanol is adopted to modify PET resin, the unique unsaturated long chain of cardanol can play a role in toughening and diluting, and the cardanol modified PET resin can obviously reduce the viscosity and improve the toughness of an epoxy resin material; the invention adopts natural components for modification, has safe, degradable and nontoxic properties, and can be widely applied;
the preparation method is simple, and the prepared PET blown film bag has the advantages of good toughness, good flame retardant property, stable film forming property, safety, no toxicity and wide application prospect.
Detailed Description
The technical solutions in the embodiments of the present invention will be clearly and completely described below in conjunction with the embodiments of the present invention, and it is obvious that the embodiments described are only some representative embodiments of the present invention, rather than all embodiments, and all other embodiments obtained by a person skilled in the art without creative efforts belong to the protection scope of the present invention.
Example 1
The raw materials comprise the following components in parts by weight: 100 parts of modified PET resin, 3001 parts of antioxidant, UV-5312 parts of ultraviolet absorbent and 10 parts of calcium carbonate.
The modified PET resin is prepared from the following raw materials in parts by weight: 5 parts of cardanol, 100 parts of terephthalic acid, 100 parts of ethylene glycol, 5 parts of citric acid, 1 part of anhydrous sodium bicarbonate, 1 part of ethylene glycol titanium, 20 parts of polylactic acid and 1 part of coupling agent.
The modified PET resin is prepared by the following method:
s1, adding terephthalic acid, ethylene glycol, citric acid, a catalyst titanium glycol and an auxiliary agent anhydrous sodium bicarbonate into a polymerization kettle to perform pressurized esterification and polycondensation reaction to obtain PET polyester, wherein the yield is 90%;
the number average molecular weight of the PET polyester is 21000, and the viscosity of the PET polyester is 3000 cp;
s2, heating cardanol, polylactic acid and a coupling agent to 70 ℃, uniformly stirring, adding the cardanol, polylactic acid and coupling agent into PET (polyethylene terephthalate) polyester, reacting for 2-3h, and granulating to obtain the modified PET resin.
The preparation method of the PET film blowing bag comprises the following steps:
s1, preparing plastic: adding the modified PET resin, the antioxidant 300, the ultraviolet absorbent UV-531 and the calcium carbonate into a mixer, heating to 100 ℃, mixing for 2 hours, and cooling to room temperature;
s2, preparing a PET film blowing bag: and (5) adding the plastic obtained in the step (S1) into a film blowing machine for film blowing, and cutting by using a hot cutting blade after film blowing to obtain the PET film blowing bag.
Example 2
The raw materials comprise the following components in parts by weight: 150 parts of modified PET resin, 3304 parts of antioxidant, 3305 parts of antioxidant and 15 parts of calcium carbonate.
The modified PET resin is prepared from the following raw materials in parts by weight: 10 parts of cardanol, 200 parts of terephthalic acid, 200 parts of ethylene glycol, 10 parts of citric acid, 2 parts of anhydrous sodium acetate, 3 parts of cobalt acetate, 30 parts of polylactic acid and 3 parts of coupling agent.
The modified PET resin is prepared by the following method:
s1, adding terephthalic acid, ethylene glycol, citric acid, a catalyst cobalt acetate and an auxiliary agent anhydrous sodium acetate into a polymerization kettle to perform pressure esterification and polycondensation reaction to obtain PET polyester, wherein the yield is 93%;
the number average molecular weight of the PET polyester is 25000, and the viscosity is 5000 cp;
s2, heating cardanol, polylactic acid and a coupling agent to 70 ℃, uniformly stirring, adding the cardanol, polylactic acid and coupling agent into PET (polyethylene terephthalate) polyester, reacting for 3 hours, and granulating to obtain the modified PET resin.
The preparation method of the PET film blowing bag comprises the following steps:
s1, preparing plastic: adding the modified PET resin, the antioxidant 330, the ultraviolet absorbent UV-0 and the calcium carbonate into a mixer, heating to 120 ℃, mixing for 3 hours, and cooling to room temperature;
s2, preparing a PET film blowing bag: and (5) adding the plastic obtained in the step (S1) into a film blowing machine for film blowing, and cutting by using a hot cutting blade after film blowing to obtain the PET film blowing bag.
Example 3
The raw materials comprise the following components in parts by weight: 120 parts of modified PET resin, 4451 parts of antioxidant, UV-93 parts of ultraviolet absorbent and 12 parts of calcium carbonate.
The modified PET resin is prepared from the following raw materials in parts by weight: 6 parts of cardanol, 120 parts of terephthalic acid, 120 parts of ethylene glycol, 6 parts of citric acid, 1.2 parts of anhydrous sodium phosphate, 1 part of ethylene glycol antimony, 22 parts of polylactic acid and 2 parts of coupling agent.
The modified PET resin is prepared by the following method:
s1, adding terephthalic acid, ethylene glycol, citric acid, a catalyst, namely ethylene glycol antimony and an auxiliary agent, namely anhydrous sodium phosphate into a polymerization kettle to perform pressurized esterification and polycondensation reaction to obtain PET polyester, wherein the yield is 92%;
the number average molecular weight of the PET polyester is 22500, and the viscosity is 3500 cp;
s2, heating cardanol, polylactic acid and a coupling agent to 70 ℃, uniformly stirring, adding the cardanol, polylactic acid and coupling agent into PET (polyethylene terephthalate) polyester, reacting for 2 hours, and granulating to obtain the modified PET resin.
The preparation method of the PET film blowing bag comprises the following steps:
s1, preparing plastic: adding the modified PET resin, the antioxidant 445, the ultraviolet absorbent UV-9 and the calcium carbonate into a mixer, heating to 105 ℃, mixing for 2 hours, and cooling to room temperature;
s2, preparing a PET film blowing bag: and (5) adding the plastic obtained in the step (S1) into a film blowing machine for film blowing, and cutting by using a hot cutting blade after film blowing to obtain the PET film blowing bag.
Example 4
The raw materials comprise the following components in parts by weight: 130 parts of modified PET resin, 10103 parts of antioxidant, UV-3265 parts of ultraviolet absorbent and 14 parts of calcium carbonate.
The modified PET resin is prepared from the following raw materials in parts by weight: 9 parts of cardanol, 180 parts of terephthalic acid, 180 parts of ethylene glycol, 9 parts of citric acid, 1.7 parts of anhydrous sodium oxalate, 2 parts of cobalt acetate, 27 parts of polylactic acid and 3 parts of a coupling agent.
The modified PET resin is prepared by the following method:
s1, adding terephthalic acid, ethylene glycol, citric acid, a catalyst cobalt acetate and an auxiliary agent anhydrous sodium oxalate into a polymerization kettle to perform pressurized esterification and polycondensation reaction to obtain PET polyester, wherein the yield is 94%;
the number average molecular weight of the PET polyester is 2450, and the viscosity is 4500 cp;
s2, heating cardanol, polylactic acid and a coupling agent to 70 ℃, uniformly stirring, adding the cardanol, polylactic acid and coupling agent into PET (polyethylene terephthalate) polyester, reacting for 3 hours, and granulating to obtain the modified PET resin.
The preparation method of the PET film blowing bag comprises the following steps:
s1, preparing plastic: adding the modified PET resin, the antioxidant 1010, the ultraviolet absorbent UV-326 and the calcium carbonate into a mixer, heating to 115 ℃, mixing for 3 hours, and cooling to room temperature;
s2, preparing a PET film blowing bag: and (5) adding the plastic obtained in the step (S1) into a film blowing machine for film blowing, and cutting by using a hot cutting blade after film blowing to obtain the PET film blowing bag.
Example 5
The raw materials comprise the following components in parts by weight: 125 parts of modified PET resin, 31142 parts of antioxidant, UV-3274 parts of ultraviolet absorbent and 13 parts of calcium carbonate.
The modified PET resin is prepared from the following raw materials in parts by weight: 7 parts of cardanol, 150 parts of terephthalic acid, 150 parts of ethylene glycol, 7 parts of citric acid, 1.5 parts of anhydrous calcium carbonate, 1.2 parts of antimony trioxide, 25 parts of polylactic acid and 2.7 parts of a coupling agent.
The modified PET resin is prepared by the following method:
s1, adding terephthalic acid, ethylene glycol, citric acid, antimony trioxide as a catalyst and anhydrous calcium carbonate as an auxiliary agent into a polymerization kettle to perform pressurized esterification and polycondensation reaction to obtain PET polyester, wherein the yield is 96%;
the number average molecular weight of the PET polyester is 23000, and the viscosity is 4000 cp;
s2, heating cardanol, polylactic acid and a coupling agent to 70 ℃, uniformly stirring, adding the cardanol, polylactic acid and coupling agent into PET (polyethylene terephthalate) polyester, reacting for 3 hours, and granulating to obtain the modified PET resin.
The preparation method of the PET film blowing bag comprises the following steps:
s1, preparing plastic: adding the modified PET resin, the antioxidant 3114, the ultraviolet absorbent UV-327 and the calcium carbonate into a mixer, heating to 110 ℃, mixing for 2.5h, and cooling to room temperature;
s2, preparing a PET film blowing bag: and (5) adding the plastic obtained in the step (S1) into a film blowing machine for film blowing, and cutting by using a hot cutting blade after film blowing to obtain the PET film blowing bag.
Example 6
The raw materials comprise the following components in parts by weight: 250 parts of modified PET resin, 31141 parts of antioxidant, UV-3271 parts of ultraviolet absorbent and 2 parts of calcium carbonate.
The modified PET resin is prepared from the following raw materials in parts by weight: 20 parts of cardanol, 70 parts of terephthalic acid, 70 parts of ethylene glycol, 2 parts of citric acid, 2 parts of anhydrous calcium carbonate, 2 parts of antimony trioxide, 10 parts of polylactic acid and 1 part of coupling agent.
The modified PET resin is prepared by the following method:
s1, adding terephthalic acid, ethylene glycol, citric acid, antimony trioxide as a catalyst and anhydrous calcium carbonate as an auxiliary agent into a polymerization kettle to perform pressure esterification and polycondensation reaction to obtain PET polyester, wherein the yield is 50%;
the number average molecular weight of the PET polyester is 17000, and the viscosity is 2200 cp;
s2, heating cardanol, polylactic acid and a coupling agent to 70 ℃, uniformly stirring, adding the cardanol, polylactic acid and coupling agent into PET (polyethylene terephthalate) polyester, reacting for 3 hours, and granulating to obtain the modified PET resin.
The preparation method of the PET film blowing bag comprises the following steps:
s1, preparing plastic: adding the modified PET resin, the antioxidant 3114, the ultraviolet absorbent UV-327 and the calcium carbonate into a mixer, heating to 110 ℃, mixing for 2.5h, and cooling to room temperature;
s2, preparing a PET film blowing bag: and (5) adding the plastic obtained in the step (S1) into a film blowing machine for film blowing, and cutting by using a hot cutting blade after film blowing to obtain the PET film blowing bag.
Comparative example 1
Compared to example 5, no citric acid was added to the synthesis of the modified PET polyester.
Comparative example 2
Compared to example 5, no calcium carbonate was added.
Comparative example 3
Compared with example 5, cardanol was not added to the modified PET resin.
Test example 1
Inventive examples 1-7 and comparative examples 1-3, as well as commercially available blown film pouches were subjected to performance testing and the results are shown in table 1.
TABLE 1
As can be seen from the above table, the PET film blowing bag prepared by the embodiment of the invention has the advantages of small thickness, good mechanical property, high tensile strength, high elongation at break, low moisture absorption rate and good flame retardant property, so that the PET film blowing bag can adapt to environments of high temperature, solarization, humidity and the like in daily requirements, and is obviously superior to similar products sold in the market. Although the example 6 is the same as the example 5 in raw material, but the formulation ratio is different from the formulation ratio in the range of the present application, and the performance parameters are obviously inferior to the example 5 in the present invention, it can be seen that the material with better performance can be obtained only by the formulation ratio in the range of the present application, and the performance of the material obtained by the formulation ratio higher or lower is far from the requirement.
Compared with the comparative example 1, the citric acid is added in the polyester synthesis to improve the thermal property of the PET resin; compared with the comparative example 2, the calcium carbonate plays an important role in improving the mechanical property of the material; compared with comparative example 3, it can be seen that cardanol mainly acts to improve the degradability of the blown film bag.
Test example 2
The PET polyesters prepared in inventive examples 1-6 and comparative example 1 were subjected to performance tests, and the results are shown in Table 2.
TABLE 2
| Performance of | Unit of | Example 1 | Example 2 | Example 3 | Example 4 | Example 5 | Example 6 | Comparative example 1 |
| Number average molecular weight | / | 21000 | 25000 | 22500 | 24500 | 23000 | 17000 | 12000 |
| Viscosity of the oil | cp | 3000 | 5000 | 3500 | 4500 | 4000 | 2200 | 1800 |
| Yield of the product | ％ | 90 | 93 | 92 | 94 | 96 | 50 | 45 |
| Flame retardant properties | / | V-1 | V-1 | V-1 | V-1 | V-1 | V-2 | HB |
As can be seen from Table 2, compared with comparative example 1, the citric acid added in examples 1-6 has higher number average molecular weight and viscosity and better flame retardant property; although the example 6 is the same as the raw material of the example 5, but the formula proportion is different, and the number average molecular weight, the viscosity, the flame retardant property and the yield are obviously inferior to the formula proportion in the range protected by the application in the example 5, so that the material with better property can be obtained only by the formula proportion in the range protected by the application, and the property of the material obtained by the formula proportion higher or lower is far from the requirement.
Compared with the modified PET resin prepared in the embodiment 5, the modified PET resin prepared in the comparative example 3 is not added with cardanol, guar gum and cellulose, so that the mechanical property and the degradability are greatly reduced, the moisture absorption rate is greatly improved, and the comprehensive performance is obviously reduced. Comparative examples 4-6 do not add cardanol, guar gum, cellulose respectively, compare with comparative example 3, the performance has better improvement, but the comprehensive properties is also poorer than example 5, and it can be seen that cardanol, guar gum, cellulose play a role in improving the comprehensive properties of PET resin together through synergistic action.
Compared with the prior art, the invention adds citric acid for modification in the condensation reaction of terephthalic acid and ethylene glycol, is beneficial to improving the molecular weight and viscosity of polyester, has better thermal property and accelerates the polycondensation rate in the polymerization process;
according to the invention, cardanol is adopted to modify PET resin, the unique unsaturated long chain of cardanol can play a role in toughening and diluting, and the cardanol modified PET resin can obviously reduce the viscosity and improve the toughness of an epoxy resin material; the invention adopts natural components for modification, has safe, degradable and nontoxic properties, and can be widely applied;
the preparation method is simple, and the prepared PET blown film bag has the advantages of good toughness, good flame retardant property, stable film forming property, safety, no toxicity and wide application prospect.
Various modifications may be made to the above without departing from the spirit and scope of the invention as defined by the appended claims. The scope of the invention is therefore intended to be limited not by the above description, but rather by the scope of the appended claims.
Claims (10)
1. The PET film blowing bag is characterized by being prepared from the following raw materials: modified PET resin, an antioxidant, an ultraviolet absorbent and calcium carbonate;
the modified PET resin is prepared from the following raw materials: cardanol, terephthalic acid, ethylene glycol, citric acid, an auxiliary agent, a catalyst, polylactic acid and a coupling agent;
the modified PET resin is prepared by the following method:
s1, adding terephthalic acid, ethylene glycol, citric acid, a catalyst and an auxiliary agent into a polymerization kettle to perform pressure esterification and polycondensation reaction to obtain PET polyester;
the number average molecular weight of the PET polyester is 21000-25000, and the viscosity is 3000-5000 cp;
s2, heating cardanol, polylactic acid and a coupling agent to 70 ℃, uniformly stirring, adding the cardanol, polylactic acid and coupling agent into PET (polyethylene terephthalate) polyester, reacting for 2-3h, and granulating to obtain the modified PET resin.
2. The PET film blowing bag according to claim 1, which is prepared from the following raw materials in parts by weight: 100-150 parts of modified PET resin, 1-4 parts of antioxidant, 2-5 parts of ultraviolet absorbent and 10-15 parts of calcium carbonate;
the modified PET resin is prepared from the following raw materials in parts by weight: 5-10 parts of cardanol, 100-200 parts of terephthalic acid, 100-200 parts of ethylene glycol, 5-10 parts of citric acid, 1-2 parts of an auxiliary agent, 1-3 parts of a catalyst, 20-30 parts of polylactic acid and 1-3 parts of a coupling agent.
3. The PET film blowing bag according to claim 1, wherein the catalyst is selected from one or more of antimony trioxide, ethylene glycol antimony, cobalt acetate, manganese acetate, titanium potassium oxalate and titanium glycol.
4. The PET film blowing bag according to claim 1, wherein the auxiliary agent is one or more selected from anhydrous sodium acetate, anhydrous calcium carbonate, anhydrous sodium bicarbonate, anhydrous sodium phosphate and anhydrous sodium oxalate.
5. The PET blown film bag of claim 1, wherein the antioxidant is selected from one or more of antioxidant 1010, antioxidant 3114, antioxidant 1076, antioxidant 330, antioxidant 300, antioxidant 405 and antioxidant 445.
6. The PET blown film bag of claim 1 wherein the UV absorber is selected from one or more of UV absorber UV-9, UV absorber UV-531, UV absorber UV-326, UV absorber UV-0, UV absorber UV-1130 and UV absorber UV-327.
7. The PET blown film bag of claim 1 wherein the coupling agent is a silane coupling agent or a titanate coupling agent.
8. The PET blown film bag of claim 7 wherein the titanate coupling agent is selected from one or more of TMC-102, TMC-201, TMC-101, TMC-105 and TMC-311.
9. The PET blown film bag of claim 7, wherein the silane coupling agent is selected from one or more of KH550, KH560, KH570, KH792, DL602 and DL 171.
10. A method for preparing a PET blown film pouch according to any one of claims 1 to 9, comprising the steps of:
s1, preparing plastic: adding the modified PET resin, the antioxidant, the ultraviolet absorbent and the calcium carbonate into a mixer, heating to the temperature of 100 ℃ and 120 ℃, mixing for 2-3h, and cooling to room temperature;
s2, preparing a PET film blowing bag: and (5) adding the plastic obtained in the step (S1) into a film blowing machine for film blowing, and cutting by using a hot cutting blade after film blowing to obtain the PET film blowing bag.
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN117964999A (en) * | 2024-02-21 | 2024-05-03 | 无锡纯宇环保制品有限公司 | Packaging bag capable of being recycled and reused infinitely and production process thereof |
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| CN109880314A (en) * | 2019-02-19 | 2019-06-14 | 郭娟 | A kind of modified by cardanol PET protection film |
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| FR2503718A1 (en) * | 1981-04-08 | 1982-10-15 | Owens Illinois Inc | Thermoplastic co-polyester prepd. by solid state polymerisation - contg. units derived from bis:(beta-hydroxyethoxyphenyl) sulphone |
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