CN113831666A - Polyvinyl chloride film and preparation method thereof - Google Patents
Polyvinyl chloride film and preparation method thereof Download PDFInfo
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- CN113831666A CN113831666A CN202111226464.0A CN202111226464A CN113831666A CN 113831666 A CN113831666 A CN 113831666A CN 202111226464 A CN202111226464 A CN 202111226464A CN 113831666 A CN113831666 A CN 113831666A
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- polyvinyl chloride
- plasticizer
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- 239000004800 polyvinyl chloride Substances 0.000 title claims abstract description 95
- 229920000915 polyvinyl chloride Polymers 0.000 title claims abstract description 94
- 238000002360 preparation method Methods 0.000 title claims abstract description 7
- 239000004014 plasticizer Substances 0.000 claims abstract description 37
- 239000000945 filler Substances 0.000 claims abstract description 17
- 239000011347 resin Substances 0.000 claims abstract description 16
- 229920005989 resin Polymers 0.000 claims abstract description 16
- -1 fatty acid ester Chemical class 0.000 claims abstract description 15
- 239000001506 calcium phosphate Substances 0.000 claims abstract description 14
- 229910000389 calcium phosphate Inorganic materials 0.000 claims abstract description 14
- 235000011010 calcium phosphates Nutrition 0.000 claims abstract description 14
- QORWJWZARLRLPR-UHFFFAOYSA-H tricalcium bis(phosphate) Chemical compound [Ca+2].[Ca+2].[Ca+2].[O-]P([O-])([O-])=O.[O-]P([O-])([O-])=O QORWJWZARLRLPR-UHFFFAOYSA-H 0.000 claims abstract description 14
- 235000014113 dietary fatty acids Nutrition 0.000 claims abstract description 12
- 239000000194 fatty acid Substances 0.000 claims abstract description 12
- 229930195729 fatty acid Natural products 0.000 claims abstract description 12
- 239000003381 stabilizer Substances 0.000 claims abstract description 10
- 239000004605 External Lubricant Substances 0.000 claims abstract description 9
- 239000004610 Internal Lubricant Substances 0.000 claims abstract description 9
- 125000005591 trimellitate group Chemical group 0.000 claims abstract description 9
- ATJFFYVFTNAWJD-UHFFFAOYSA-N Tin Chemical compound [Sn] ATJFFYVFTNAWJD-UHFFFAOYSA-N 0.000 claims abstract description 8
- 238000003756 stirring Methods 0.000 claims description 48
- 239000000463 material Substances 0.000 claims description 26
- 238000001816 cooling Methods 0.000 claims description 23
- 239000002994 raw material Substances 0.000 claims description 16
- 239000000203 mixture Substances 0.000 claims description 14
- 238000003490 calendering Methods 0.000 claims description 10
- 238000002156 mixing Methods 0.000 claims description 9
- 239000012188 paraffin wax Substances 0.000 claims description 7
- AJDTZVRPEPFODZ-PAMPIZDHSA-J [Sn+4].[O-]C(=O)\C=C/C([O-])=O.[O-]C(=O)\C=C/C([O-])=O Chemical compound [Sn+4].[O-]C(=O)\C=C/C([O-])=O.[O-]C(=O)\C=C/C([O-])=O AJDTZVRPEPFODZ-PAMPIZDHSA-J 0.000 claims description 6
- 229940057995 liquid paraffin Drugs 0.000 claims description 5
- ARCGXLSVLAOJQL-UHFFFAOYSA-N trimellitic acid Chemical compound OC(=O)C1=CC=C(C(O)=O)C(C(O)=O)=C1 ARCGXLSVLAOJQL-UHFFFAOYSA-N 0.000 claims description 5
- QMMJWQMCMRUYTG-UHFFFAOYSA-N 1,2,4,5-tetrachloro-3-(trifluoromethyl)benzene Chemical compound FC(F)(F)C1=C(Cl)C(Cl)=CC(Cl)=C1Cl QMMJWQMCMRUYTG-UHFFFAOYSA-N 0.000 claims description 4
- 229910021626 Tin(II) chloride Inorganic materials 0.000 claims description 4
- GLDOVTGHNKAZLK-UHFFFAOYSA-N octadecan-1-ol Chemical compound CCCCCCCCCCCCCCCCCCO GLDOVTGHNKAZLK-UHFFFAOYSA-N 0.000 claims description 4
- LYRFLYHAGKPMFH-UHFFFAOYSA-N octadecanamide Chemical compound CCCCCCCCCCCCCCCCCC(N)=O LYRFLYHAGKPMFH-UHFFFAOYSA-N 0.000 claims description 4
- 239000007787 solid Substances 0.000 claims description 4
- SYKYENWAGZGAFV-UHFFFAOYSA-N triheptyl benzene-1,2,4-tricarboxylate Chemical compound CCCCCCCOC(=O)C1=CC=C(C(=O)OCCCCCCC)C(C(=O)OCCCCCCC)=C1 SYKYENWAGZGAFV-UHFFFAOYSA-N 0.000 claims description 4
- ROPPTGKKZZDFJN-UHFFFAOYSA-N trinonyl benzene-1,2,4-tricarboxylate Chemical group CCCCCCCCCOC(=O)C1=CC=C(C(=O)OCCCCCCCCC)C(C(=O)OCCCCCCCCC)=C1 ROPPTGKKZZDFJN-UHFFFAOYSA-N 0.000 claims description 4
- 238000000034 method Methods 0.000 claims description 3
- 239000002253 acid Substances 0.000 claims description 2
- 238000007599 discharging Methods 0.000 claims description 2
- 238000006116 polymerization reaction Methods 0.000 claims description 2
- 239000000725 suspension Substances 0.000 claims description 2
- 239000005635 Caprylic acid (CAS 124-07-2) Substances 0.000 claims 1
- 238000001125 extrusion Methods 0.000 claims 1
- 229960002446 octanoic acid Drugs 0.000 claims 1
- 238000007493 shaping process Methods 0.000 claims 1
- 239000006057 Non-nutritive feed additive Substances 0.000 abstract description 4
- 238000010521 absorption reaction Methods 0.000 abstract description 4
- 238000004519 manufacturing process Methods 0.000 abstract description 4
- 238000010438 heat treatment Methods 0.000 description 15
- 125000005474 octanoate group Chemical group 0.000 description 9
- 238000009775 high-speed stirring Methods 0.000 description 7
- 238000002834 transmittance Methods 0.000 description 4
- 230000007547 defect Effects 0.000 description 3
- 229920000642 polymer Polymers 0.000 description 3
- SMYKBXMWXCZOLU-UHFFFAOYSA-N tris-decyl benzene-1,2,4-tricarboxylate Chemical compound CCCCCCCCCCOC(=O)C1=CC=C(C(=O)OCCCCCCCCCC)C(C(=O)OCCCCCCCCCC)=C1 SMYKBXMWXCZOLU-UHFFFAOYSA-N 0.000 description 3
- ZAMOUSCENKQFHK-UHFFFAOYSA-N Chlorine atom Chemical compound [Cl] ZAMOUSCENKQFHK-UHFFFAOYSA-N 0.000 description 2
- 239000004593 Epoxy Chemical class 0.000 description 2
- 239000000460 chlorine Substances 0.000 description 2
- 229910052801 chlorine Inorganic materials 0.000 description 2
- 150000001875 compounds Chemical class 0.000 description 2
- 150000002148 esters Chemical class 0.000 description 2
- 239000000178 monomer Substances 0.000 description 2
- XNGIFLGASWRNHJ-UHFFFAOYSA-N phthalic acid Chemical class OC(=O)C1=CC=CC=C1C(O)=O XNGIFLGASWRNHJ-UHFFFAOYSA-N 0.000 description 2
- 229920003023 plastic Polymers 0.000 description 2
- 239000004033 plastic Substances 0.000 description 2
- 230000002035 prolonged effect Effects 0.000 description 2
- JNXDCMUUZNIWPQ-UHFFFAOYSA-N trioctyl benzene-1,2,4-tricarboxylate Chemical compound CCCCCCCCOC(=O)C1=CC=C(C(=O)OCCCCCCCC)C(C(=O)OCCCCCCCC)=C1 JNXDCMUUZNIWPQ-UHFFFAOYSA-N 0.000 description 2
- 241001391944 Commicarpus scandens Species 0.000 description 1
- BZHJMEDXRYGGRV-UHFFFAOYSA-N Vinyl chloride Chemical compound ClC=C BZHJMEDXRYGGRV-UHFFFAOYSA-N 0.000 description 1
- 150000007513 acids Chemical class 0.000 description 1
- 230000009471 action Effects 0.000 description 1
- WNLRTRBMVRJNCN-UHFFFAOYSA-L adipate(2-) Chemical compound [O-]C(=O)CCCCC([O-])=O WNLRTRBMVRJNCN-UHFFFAOYSA-L 0.000 description 1
- 125000001931 aliphatic group Chemical group 0.000 description 1
- 239000003674 animal food additive Substances 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 230000005540 biological transmission Effects 0.000 description 1
- 238000000071 blow moulding Methods 0.000 description 1
- 239000000428 dust Substances 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 230000009477 glass transition Effects 0.000 description 1
- 230000005484 gravity Effects 0.000 description 1
- 239000000314 lubricant Substances 0.000 description 1
- 230000007246 mechanism Effects 0.000 description 1
- 230000005012 migration Effects 0.000 description 1
- 238000013508 migration Methods 0.000 description 1
- 239000003607 modifier Substances 0.000 description 1
- 125000001400 nonyl group Chemical group [H]C([*])([H])C([H])([H])C([H])([H])C([H])([H])C([H])([H])C([H])([H])C([H])([H])C([H])([H])C([H])([H])[H] 0.000 description 1
- 150000003014 phosphoric acid esters Chemical class 0.000 description 1
- 239000000843 powder Substances 0.000 description 1
- 238000001556 precipitation Methods 0.000 description 1
- 238000004321 preservation Methods 0.000 description 1
- 230000008569 process Effects 0.000 description 1
- 238000010345 tape casting Methods 0.000 description 1
- 231100000331 toxic Toxicity 0.000 description 1
- 230000002588 toxic effect Effects 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
- C08J—WORKING-UP; GENERAL PROCESSES OF COMPOUNDING; AFTER-TREATMENT NOT COVERED BY SUBCLASSES C08B, C08C, C08F, C08G or C08H
- C08J2327/00—Characterised by the use of homopolymers or copolymers of compounds having one or more unsaturated aliphatic radicals, each having only one carbon-to-carbon double bond, and at least one being terminated by a halogen; Derivatives of such polymers
- C08J2327/02—Characterised by the use of homopolymers or copolymers of compounds having one or more unsaturated aliphatic radicals, each having only one carbon-to-carbon double bond, and at least one being terminated by a halogen; Derivatives of such polymers not modified by chemical after-treatment
- C08J2327/04—Characterised by the use of homopolymers or copolymers of compounds having one or more unsaturated aliphatic radicals, each having only one carbon-to-carbon double bond, and at least one being terminated by a halogen; Derivatives of such polymers not modified by chemical after-treatment containing chlorine atoms
- C08J2327/06—Homopolymers or copolymers of vinyl chloride
-
- 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
- C08K3/32—Phosphorus-containing compounds
- C08K2003/321—Phosphates
- C08K2003/325—Calcium, strontium or barium phosphate
-
- 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
- C08K5/00—Use of organic ingredients
- C08K5/04—Oxygen-containing compounds
- C08K5/10—Esters; Ether-esters
- C08K5/11—Esters; Ether-esters of acyclic polycarboxylic acids
-
- 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
- C08K5/00—Use of organic ingredients
- C08K5/04—Oxygen-containing compounds
- C08K5/10—Esters; Ether-esters
- C08K5/12—Esters; Ether-esters of cyclic polycarboxylic acids
Landscapes
- Chemical & Material Sciences (AREA)
- Engineering & Computer Science (AREA)
- Manufacturing & Machinery (AREA)
- Materials Engineering (AREA)
- Health & Medical Sciences (AREA)
- Chemical Kinetics & Catalysis (AREA)
- Medicinal Chemistry (AREA)
- Polymers & Plastics (AREA)
- Organic Chemistry (AREA)
- Compositions Of Macromolecular Compounds (AREA)
- Processing And Handling Of Plastics And Other Materials For Molding In General (AREA)
Abstract
The invention provides a polyvinyl chloride film and a preparation method thereof, wherein the polyvinyl chloride film is mainly prepared from polyvinyl chloride resin, an organic tin stabilizer, a fatty acid ester plasticizer, a trimellitate plasticizer, a calcium phosphate filler, an internal lubricant and an external lubricant in specific parts by weight. By adopting the specific functional processing aids such as the plasticizer, the filler and the like, the invention not only can improve the thermal stability of the PVC film in the production process, but also can improve the heat resistance of the PVC film in later use, reduce the heat absorption capacity of the plasticizer in the film, ensure that the plasticizer is not easy to separate out and volatilize, prevent two layers of the PVC film from being sticky, and prolong the service life of the PVC film by 30-40%.
Description
Technical Field
The invention relates to the field of film manufacturing, in particular to a polyvinyl chloride film and a preparation method thereof.
Background
Polyvinyl chloride (pvc), which is abbreviated as pvc (polyvinyl chloride), is a high polymer obtained by homopolymerizing or copolymerizing vinyl chloride monomer with other monomers. PVC is white powder with an amorphous structure, has small branching degree, relative density of about 1.4 and glass transition temperature of 77-90 ℃.
Polyvinyl chloride films are made from polyvinyl chloride resin and other modifiers by calendering or blow molding processes, and are generally called PVC sheets with a thickness of 0.08-0.2mm, greater than 0.25 mm. The PVC film comprises functional processing aids such as polyvinyl chloride resin, a plasticizer, a stabilizer, a filler, a lubricant and the like, and is prepared by processing technologies such as calendaring or high-temperature tape casting, and the PVC film has the advantages of good heat preservation, good light transmittance, softness, easiness in modeling and the like, is suitable for being used as an outer covering material of greenhouses, greenhouses and medium and small greenhouses, but also has the defects of low film specific gravity, higher cost, poor weather resistance, easiness in softening and loosening at high temperature, easiness in dust absorption of film surfaces and the like.
The plasticizer is also called plasticizer, is one of the highest usage amount in the PVC film processing aid, can increase the plasticity of the PVC material by adding the plasticizer into the PVC material, has the action mechanism of reducing intermolecular force of the polymer to enable the polymer to be easier to polymerize, and is characterized in that the hardness, softening temperature and brittle temperature of the plastic are reduced, and the elongation, flexibility and flexibility of the plastic are improved.
The types of the plasticizers commonly used at present comprise phthalate esters, epoxy esters, chlorine-containing compounds, phosphate esters, aliphatic dibasic acids and the like, but the plasticizers have the defects that the phthalate esters are toxic and not environment-friendly, the epoxy ester products are easy to bleed oil and the like, and the chlorine-containing compounds are poor in compatibility with PVC and cold resistance and the like. Meanwhile, the existing plasticizer is easy to separate out and volatilize at high temperature, so that two layers of the PVC film are sticky, the light transmittance is reduced, and the service life is shortened.
Chinese patent CN106188930A provides a formula of PVC film, adopts mixed plasticizer of adipate and ethylene-selenate, only solves the problem that PVC film becomes brittle and easy to break due to plasticizer migration in the production process, and does not solve the problem that PVC film light transmittance is reduced and service life is reduced due to plasticizer precipitation and volatilization in the use process.
Therefore, it is an urgent need in the market to develop an appropriate PVC film, which is tacky when used for a long time, improves thermal stability and light transmittance stability, and prolongs the service life.
Disclosure of Invention
In order to overcome the defects in the prior art, the invention provides the PVC film with good thermal stability and light transmission stability and the preparation method thereof, and the PVC film mainly improves the formula of the existing PVC film, the plasticizer adopts fatty acid esters and trimellitates for mixed use, and the filler adopts calcium phosphate, so that the heat resistance of the PVC film is improved, the heat absorption energy of the plasticizer in the film is reduced, the plasticizer is not easy to separate out, and the service life of the PVC film is prolonged.
Specifically, the PVC film comprises the following components in parts by weight: 100 parts of PVC resin, 3-5 parts of organic tin stabilizer, 5-15 parts of fatty acid ester plasticizer, 15-25 parts of trimellitic acid plasticizer, 20-30 parts of calcium phosphate filler, 0.5-0.7 part of internal lubricant and 0.02-0.05 part of external lubricant;
preferably, the feed additive is mainly prepared from the following components in parts by mass: 100 parts of PVC resin, 4-4.5 parts of organic tin stabilizer, 8-10 parts of fatty acid ester plasticizer, 20-22 parts of trimellitate plasticizer, 23-25 parts of calcium phosphate filler, 0.6-0.7 part of internal lubricant and 0.02-0.025 part of external lubricant;
further, the PVC resin is loose PVC resin prepared by a suspension method, and the polymerization degree is 3500-4000;
further, the aliphatic ester plasticizer is any one or a mixture of two of 1,4, 8-trioctyl octoate, 1,4, 8-triheptyl octoate, 1,4, 8-trinonyl octoate, 1,4, 8-triisooctyl octoate, 1,4, 8-triisoheptyl octoate and 1,4, 8-triisononyl octoate;
further, the trimellitate plasticizer is any one or mixture of trinonyl trimellitate, triheptyl trimellitate, trioctyl trimellitate and tridecyl trimellitate;
further, the organic tin stabilizer is fatty acid tin salt or maleic acid tin salt;
further, the internal lubricant is any one of stearic alcohol, butyl stearate and stearic amide;
further, the external lubricant is any one of liquid paraffin, solid paraffin and microcrystalline paraffin:
the specific preparation method of the PVC film comprises the following steps
(1) Opening a high-speed mixing stirrer, putting PVC resin into the high-speed stirrer, stirring and heating to 65-70 ℃, adding an organic tin stabilizer and an internal lubricant, continuously stirring and heating to 100-105 ℃, adding a fatty acid ester plasticizer, a trimellitate plasticizer external lubricant and a calcium phosphate filler, continuously stirring and heating to 130-135 ℃, and stirring for 25-30 minutes;
(2) putting the mixture into a low-speed stirrer from a high-speed stirring mixer, simultaneously opening the low-speed stirrer, preserving heat and stirring for 35-45 minutes, naturally cooling and stirring, and starting to discharge when the temperature reaches 35-40 ℃;
(3) and (3) discharging materials, feeding the materials into an extruding machine through a feeding machine, controlling the extruding temperature to be 145-155 ℃, and controlling the speed ratio of the feeding machine to the extruding machine to be 1: 2-4;
(4) feeding the extruded material into an open mill, controlling the open mill temperature to be 150-155 ℃, and controlling the roll gap to be generally 0.1-0.15 mm to obtain a PVC film raw material;
(5) and then, feeding the PVC film raw material into a calender, controlling the calendering temperature to be 180-185 ℃, wherein the speed ratio of a feeding machine to the calender is 1: 1.5;
(6) and (3) putting the extruded PVC film into a cooling setting machine, wherein the cooling temperature is 50-55 ℃, and the walking speed is controlled at 60-70 m/min, so as to obtain the PVC film.
The invention has the beneficial effects that: by adopting specific functional processing aids such as plasticizer, filler and the like, the thermal stability of the PVC film in the production process can be improved, and in later use, the heat resistance of the PVC film can be improved, the heat absorption capacity of the plasticizer in the film is reduced, the plasticizer is not easy to separate out and volatilize, the stickiness of two layers of the PVC film can not be caused, and the service life of the PVC film is prolonged by 30-40%.
Detailed Description
The present invention will be described in detail with reference to the following embodiments in order to explain the technical content, structural features, and objects and effects of the invention in detail.
The first embodiment is as follows:
(1) opening a high-speed mixing stirrer, putting 100 parts by weight of PVC resin into the high-speed stirrer, stirring and heating to 65 ℃, adding 3 parts by weight of fatty acid tin salt and 0.5 part by weight of stearic alcohol, continuing to stir and heat to 100 ℃, adding 5 parts by weight of 1,4, 8-trioctyl octoate, 15 parts by weight of trinonyl trimellitate, 0.02 part of liquid paraffin and 20 parts by weight of calcium phosphate filler, continuing to stir and heat to 130 ℃, and stirring for 25 minutes;
(2) putting the mixture into a low-speed stirrer from a high-speed stirring mixer, simultaneously opening the low-speed stirrer, preserving heat and stirring for 35 minutes, naturally cooling and stirring, and starting to discharge materials when the temperature reaches 35 ℃;
(3) the discharged material is sent into an extruding machine through a feeding machine, the extruding temperature is controlled to be 145 ℃, and the speed ratio of the feeding machine to the extruding machine is 1: 2;
(4) feeding the extruded material into an open mill, controlling the open mill temperature at 150 ℃ and the roller gap at 0.1mm to obtain a PVC film raw material;
(5) and then feeding the PVC film raw material into a calender, controlling the calendering temperature to be 180 ℃, wherein the speed ratio of a feeding machine to the calender is 1: 1.5;
(6) and (3) putting the extruded PVC film into a cooling setting machine, wherein the cooling temperature is 50 ℃, and the walking speed is controlled at 60 m/min, so as to obtain the PVC film.
Example two:
(1) opening a high-speed mixing stirrer, putting 100 parts by weight of PVC resin into the high-speed stirrer, stirring and heating to 70 ℃, adding 5 parts by weight of tin maleate and 0.7 part by weight of butyl stearate, continuously stirring and heating to 105 ℃, adding 15 parts by weight of 1,4, 8-triheptyl octoate, 25 parts by weight of trioctyl trimellitate, 0.05 part by weight of solid paraffin and 30 parts by weight of calcium phosphate filler, continuously stirring and heating to 135 ℃, and stirring for 25 minutes;
(2) putting the mixture into a low-speed stirrer from a high-speed stirring mixer, simultaneously opening the low-speed stirrer, preserving heat and stirring for 35 minutes, naturally cooling and stirring, and starting to discharge materials when the temperature reaches 40 ℃;
(3) the discharged material is sent into an extruding machine through a feeding machine, the extruding temperature is controlled to be 155 ℃, and the speed ratio of the feeding machine to the extruding machine is 1: 4;
(4) feeding the extruded material into an open mill, controlling the open mill temperature to be 155 ℃ and the roller gap to be 0.15mm, and obtaining a PVC film raw material;
(5) and then feeding the PVC film raw material into a calender, controlling the calendering temperature to be 185 ℃, wherein the speed ratio of a feeding machine to the calender is 1: 1.5;
(6) and (3) putting the extruded PVC film into a cooling setting machine, wherein the cooling temperature is 55 ℃, and the walking speed is controlled at 70 m/min, so as to obtain the PVC film.
Example three:
(1) turning on a high-speed mixing stirrer, putting 100 parts by weight of PVC resin into the high-speed stirrer, stirring and heating to 68 ℃, adding 4 parts by weight of tin maleate and 0.65 part by weight of stearic amide, continuing to stir and heat to 103 ℃, adding 10 parts by weight of 1,4, 8-triisoheptanoate, 21 parts by weight of tridecyl trimellitate, 0.025 part by weight of microcrystalline paraffin and 24 parts by weight of calcium phosphate filler, continuing to stir and heat to 132 ℃, and stirring for 30 minutes;
(2) putting the mixture into a low-speed stirrer from a high-speed stirring mixer, simultaneously opening the low-speed stirrer, preserving heat and stirring for 45 minutes, naturally cooling and stirring, and starting to discharge materials when the temperature reaches 40 ℃;
(3) the discharged material is sent into an extruding machine through a feeding machine, the extruding temperature is controlled at 150 ℃, and the speed ratio of the feeding machine to the extruding machine is 1: 3;
(4) feeding the extruded material into an open mill, controlling the open mill temperature at 150 ℃ and the roller gap at 0.13mm to obtain a PVC film raw material;
(5) and then feeding the PVC film raw material into a calender, controlling the calendering temperature to be 180 ℃, wherein the speed ratio of a feeding machine to the calender is 1: 1.5;
(6) and (3) putting the extruded PVC film into a cooling setting machine, wherein the cooling temperature is 53 ℃, and the walking speed is controlled at 65 m/min, so as to obtain the PVC film.
Example four:
(1) opening a high-speed mixing stirrer, putting 100 parts by weight of PVC resin into the high-speed stirrer, stirring and heating to 70 ℃, adding 4.5 parts by weight of tin maleate and 0.55 part by weight of butyl stearate, continuously stirring and heating to 105 ℃, adding 12 parts by weight of 1,4, 8-triisononyl octoate, 18 parts by weight of triheptyl trimellitate, 0.03 part by weight of solid paraffin and 25 parts by weight of calcium phosphate filler, continuously stirring and heating to 135 ℃, and stirring for 25 minutes;
(2) putting the mixture into a low-speed stirrer from a high-speed stirring mixer, simultaneously opening the low-speed stirrer, preserving heat and stirring for 35 minutes, naturally cooling and stirring, and starting to discharge materials when the temperature reaches 40 ℃;
(3) the discharged material is sent into an extruding machine through a feeding machine, the extruding temperature is controlled to be 155 ℃, and the speed ratio of the feeding machine to the extruding machine is 1: 4;
(4) feeding the extruded material into an open mill, controlling the open mill temperature to be 155 ℃ and the roller gap to be 0.15mm, and obtaining a PVC film raw material;
(5) and then feeding the PVC film raw material into a calender, controlling the calendering temperature to be 185 ℃, wherein the speed ratio of a feeding machine to the calender is 1: 1.5;
(6) and (3) putting the extruded PVC film into a cooling setting machine, wherein the cooling temperature is 55 ℃, and the walking speed is controlled at 70 m/min, so as to obtain the PVC film.
Example five:
(1) turning on a high-speed mixing stirrer, putting 100 parts by weight of PVC resin into the high-speed stirrer, stirring and heating to 65 ℃, adding 3.5 parts by weight of tin maleate and 0.55 part by weight of stearic amide, continuing to stir and heat to 103 ℃, adding 7 parts by weight of triisooctyl 1,4, 8-octate, 23 parts by weight of a mixture of tridecyl trimellitate and triheptyl trimellitate, 0.02 part by weight of liquid paraffin and 17 parts by weight of calcium phosphate filler, continuing to stir and heat to 132 ℃, and stirring for 30 minutes;
(2) putting the mixture into a low-speed stirrer from a high-speed stirring mixer, simultaneously opening the low-speed stirrer, preserving heat and stirring for 45 minutes, naturally cooling and stirring, and starting to discharge materials when the temperature reaches 40 ℃;
(3) the discharged material is sent into an extruding machine through a feeding machine, the extruding temperature is controlled at 150 ℃, and the speed ratio of the feeding machine to the extruding machine is 1: 3;
(4) feeding the extruded material into an open mill, controlling the open mill temperature at 150 ℃ and the roller gap at 0.13mm to obtain a PVC film raw material;
(5) and then feeding the PVC film raw material into a calender, controlling the calendering temperature to be 180 ℃, wherein the speed ratio of a feeding machine to the calender is 1: 1.5;
(6) and (3) putting the extruded PVC film into a cooling setting machine, wherein the cooling temperature is 53 ℃, and the walking speed is controlled at 68 m/min, so that the PVC film is obtained.
Example six:
(1) opening a high-speed mixing stirrer, putting 100 parts by weight of PVC resin into the high-speed stirrer, stirring and heating to 70 ℃, adding 5 parts by weight of fatty acid tin salt and 0.6 part by weight of stearic alcohol, continuously stirring and heating to 100 ℃, adding 8 parts by weight of a mixture of triisooctyl 1,4, 8-octanedionate and nonyl 1,4, 8-octanedionate, 25 parts by weight of trinonyl trimellitate, 0.03 part of liquid paraffin and 28 parts by weight of calcium phosphate filler, continuously stirring and heating to 130 ℃, and stirring for 25 minutes;
(2) putting the mixture into a low-speed stirrer from a high-speed stirring mixer, simultaneously opening the low-speed stirrer, preserving heat and stirring for 35 minutes, naturally cooling and stirring, and starting to discharge materials when the temperature reaches 35 ℃;
(3) the discharged material is sent into an extruding machine through a feeding machine, the extruding temperature is controlled to be 145 ℃, and the speed ratio of the feeding machine to the extruding machine is 1: 2;
(4) feeding the extruded material into an open mill, controlling the open mill temperature at 150 ℃ and the roller gap at 0.1mm to obtain a PVC film raw material;
(5) and then feeding the PVC film raw material into a calender, controlling the calendering temperature to be 180 ℃, wherein the speed ratio of a feeding machine to the calender is 1: 1.5;
(6) and (3) putting the extruded PVC film into a cooling setting machine, wherein the cooling temperature is 50 ℃, and the walking speed is controlled at 60 m/min, so as to obtain the PVC film.
The above description is only a preferred embodiment of the present invention, and not intended to limit the scope of the present invention, and all structural equivalents which can be made by using the contents of the present specification, or applied directly or indirectly to other related technical fields, shall be included in the scope of the present invention.
Claims (9)
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN114393898A (en) * | 2022-01-17 | 2022-04-26 | 江苏吉龙运动休闲用品有限公司 | A kind of preparation process of double-layer bonded PVC composite film |
| CN118085473A (en) * | 2024-02-20 | 2024-05-28 | 浙江盛丰塑胶有限公司 | Heat-resistant PVC film and preparation method thereof |
Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1448423A (en) * | 2003-04-29 | 2003-10-15 | 佛山塑料集团股份有限公司 | Soft PVCcalendered film and and its manufacture |
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Patent Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1448423A (en) * | 2003-04-29 | 2003-10-15 | 佛山塑料集团股份有限公司 | Soft PVCcalendered film and and its manufacture |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114393898A (en) * | 2022-01-17 | 2022-04-26 | 江苏吉龙运动休闲用品有限公司 | A kind of preparation process of double-layer bonded PVC composite film |
| CN118085473A (en) * | 2024-02-20 | 2024-05-28 | 浙江盛丰塑胶有限公司 | Heat-resistant PVC film and preparation method thereof |
| CN118085473B (en) * | 2024-02-20 | 2025-01-14 | 浙江盛丰塑胶有限公司 | Heat-resistant PVC film and preparation method thereof |
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Application publication date: 20211224 |