CN113004640B - PVC film and preparation method thereof - Google Patents
PVC film and preparation method thereof Download PDFInfo
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- CN113004640B CN113004640B CN202110381467.5A CN202110381467A CN113004640B CN 113004640 B CN113004640 B CN 113004640B CN 202110381467 A CN202110381467 A CN 202110381467A CN 113004640 B CN113004640 B CN 113004640B
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- 238000002360 preparation method Methods 0.000 title claims abstract description 10
- 239000003063 flame retardant Substances 0.000 claims abstract description 32
- 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 claims abstract description 30
- 239000004014 plasticizer Substances 0.000 claims abstract description 27
- GTRSAMFYSUBAGN-UHFFFAOYSA-N tris(2-chloropropyl) phosphate Chemical compound CC(Cl)COP(=O)(OCC(C)Cl)OCC(C)Cl GTRSAMFYSUBAGN-UHFFFAOYSA-N 0.000 claims abstract description 12
- 239000011256 inorganic filler Substances 0.000 claims abstract description 9
- 229910003475 inorganic filler Inorganic materials 0.000 claims abstract description 9
- 239000000843 powder Substances 0.000 claims abstract description 8
- 239000011347 resin Substances 0.000 claims abstract description 8
- 229920005989 resin Polymers 0.000 claims abstract description 8
- 239000003242 anti bacterial agent Substances 0.000 claims abstract description 7
- XZZNDPSIHUTMOC-UHFFFAOYSA-N triphenyl phosphate Chemical compound C=1C=CC=CC=1OP(OC=1C=CC=CC=1)(=O)OC1=CC=CC=C1 XZZNDPSIHUTMOC-UHFFFAOYSA-N 0.000 claims abstract description 7
- 235000012424 soybean oil Nutrition 0.000 claims abstract description 6
- 239000003549 soybean oil Substances 0.000 claims abstract description 6
- 238000003490 calendering Methods 0.000 claims description 10
- 238000002156 mixing Methods 0.000 claims description 9
- 238000001816 cooling Methods 0.000 claims description 6
- 238000004049 embossing Methods 0.000 claims description 6
- 238000001914 filtration Methods 0.000 claims description 6
- 238000004519 manufacturing process Methods 0.000 claims description 6
- 239000000463 material Substances 0.000 claims description 6
- 238000000034 method Methods 0.000 claims description 5
- 238000005096 rolling process Methods 0.000 claims description 4
- ZVFDTKUVRCTHQE-UHFFFAOYSA-N Diisodecyl phthalate Chemical compound CC(C)CCCCCCCOC(=O)C1=CC=CC=C1C(=O)OCCCCCCCC(C)C ZVFDTKUVRCTHQE-UHFFFAOYSA-N 0.000 claims description 3
- MTYUOIVEVPTXFX-UHFFFAOYSA-N bis(2-propylheptyl) benzene-1,2-dicarboxylate Chemical compound CCCCCC(CCC)COC(=O)C1=CC=CC=C1C(=O)OCC(CCC)CCCCC MTYUOIVEVPTXFX-UHFFFAOYSA-N 0.000 claims description 3
- HBGGXOJOCNVPFY-UHFFFAOYSA-N diisononyl phthalate Chemical compound CC(C)CCCCCCOC(=O)C1=CC=CC=C1C(=O)OCCCCCCC(C)C HBGGXOJOCNVPFY-UHFFFAOYSA-N 0.000 claims description 3
- OEIWPNWSDYFMIL-UHFFFAOYSA-N dioctyl benzene-1,4-dicarboxylate Chemical compound CCCCCCCCOC(=O)C1=CC=C(C(=O)OCCCCCCCC)C=C1 OEIWPNWSDYFMIL-UHFFFAOYSA-N 0.000 claims description 3
- 239000004615 ingredient Substances 0.000 claims description 3
- 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 claims description 3
- PORQOHRXAJJKGK-UHFFFAOYSA-N 4,5-dichloro-2-n-octyl-3(2H)-isothiazolone Chemical compound CCCCCCCCN1SC(Cl)=C(Cl)C1=O PORQOHRXAJJKGK-UHFFFAOYSA-N 0.000 claims description 2
- 239000004599 antimicrobial Substances 0.000 claims description 2
- 239000000049 pigment Substances 0.000 claims description 2
- 229920000728 polyester Polymers 0.000 claims description 2
- 238000006116 polymerization reaction Methods 0.000 claims description 2
- 239000000454 talc Substances 0.000 claims 1
- 229910052623 talc Inorganic materials 0.000 claims 1
- 238000004804 winding Methods 0.000 claims 1
- 230000000844 anti-bacterial effect Effects 0.000 abstract description 13
- 239000002861 polymer material Substances 0.000 abstract description 2
- 230000000052 comparative effect Effects 0.000 description 6
- 239000003921 oil Substances 0.000 description 6
- 238000001556 precipitation Methods 0.000 description 5
- 239000000243 solution Substances 0.000 description 4
- 238000002834 transmittance Methods 0.000 description 4
- 229910019142 PO4 Inorganic materials 0.000 description 3
- 230000000694 effects Effects 0.000 description 3
- 235000019198 oils Nutrition 0.000 description 3
- 239000010452 phosphate Substances 0.000 description 3
- NBIIXXVUZAFLBC-UHFFFAOYSA-K phosphate Chemical compound [O-]P([O-])([O-])=O NBIIXXVUZAFLBC-UHFFFAOYSA-K 0.000 description 3
- 238000012360 testing method Methods 0.000 description 3
- 238000009825 accumulation Methods 0.000 description 2
- 238000009472 formulation Methods 0.000 description 2
- 239000012796 inorganic flame retardant Substances 0.000 description 2
- 239000000203 mixture Substances 0.000 description 2
- 241000894006 Bacteria Species 0.000 description 1
- 241000700605 Viruses Species 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 230000005540 biological transmission Effects 0.000 description 1
- 239000004566 building material Substances 0.000 description 1
- 238000004891 communication Methods 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 238000011161 development Methods 0.000 description 1
- FPAFDBFIGPHWGO-UHFFFAOYSA-N dioxosilane;oxomagnesium;hydrate Chemical compound O.[Mg]=O.[Mg]=O.[Mg]=O.O=[Si]=O.O=[Si]=O.O=[Si]=O.O=[Si]=O FPAFDBFIGPHWGO-UHFFFAOYSA-N 0.000 description 1
- 238000002474 experimental method Methods 0.000 description 1
- 208000015181 infectious disease Diseases 0.000 description 1
- 229910010272 inorganic material Inorganic materials 0.000 description 1
- 239000011147 inorganic material Substances 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 238000011056 performance test Methods 0.000 description 1
- 239000002994 raw material Substances 0.000 description 1
- 238000006467 substitution reaction Methods 0.000 description 1
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- 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
- C08J—WORKING-UP; GENERAL PROCESSES OF COMPOUNDING; AFTER-TREATMENT NOT COVERED BY SUBCLASSES C08B, C08C, C08F, C08G or C08H
- C08J2491/00—Characterised by the use of oils, fats or waxes; Derivatives thereof
-
- 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
- C08K13/00—Use of mixtures of ingredients not covered by one single of the preceding main groups, each of these compounds being essential
- C08K13/02—Organic and inorganic ingredients
-
- 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
- C08K2201/00—Specific properties of additives
- C08K2201/011—Nanostructured additives
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- 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
- C08K3/34—Silicon-containing compounds
-
- 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
- C08K5/36—Sulfur-, selenium-, or tellurium-containing compounds
- C08K5/45—Heterocyclic compounds having sulfur in the ring
- C08K5/46—Heterocyclic compounds having sulfur in the ring with oxygen or nitrogen in the ring
- C08K5/47—Thiazoles
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- 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
- C08K5/49—Phosphorus-containing compounds
- C08K5/51—Phosphorus bound to oxygen
- C08K5/52—Phosphorus bound to oxygen only
- C08K5/521—Esters of phosphoric acids, e.g. of H3PO4
-
- 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
- C08K5/49—Phosphorus-containing compounds
- C08K5/51—Phosphorus bound to oxygen
- C08K5/52—Phosphorus bound to oxygen only
- C08K5/521—Esters of phosphoric acids, e.g. of H3PO4
- C08K5/523—Esters of phosphoric acids, e.g. of H3PO4 with hydroxyaryl compounds
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- Health & Medical Sciences (AREA)
- Chemical Kinetics & Catalysis (AREA)
- Medicinal Chemistry (AREA)
- Polymers & Plastics (AREA)
- Organic Chemistry (AREA)
- Compositions Of Macromolecular Compounds (AREA)
- Manufacture Of Macromolecular Shaped Articles (AREA)
Abstract
The invention discloses a PVC film and a preparation method thereof, and relates to the technical field of high polymer materials. The PVC film comprises the following components in parts by weight: 100 parts of PVC resin powder, 30-35 parts of common plasticizer, 18-24 parts of flame retardant plasticizer, 0-5 parts of epoxidized soybean oil, 0.5-8 parts of organic antibacterial agent and 0-1 part of inorganic filler; the flame retardant plasticizer comprises tris (2-chloropropyl) phosphate and isopropylated triphenyl phosphate. The PVC film prepared by the formula has good antibacterial and flame retardant properties and high transparency, and is suitable for public places such as hospitals, schools, markets and the like.
Description
Technical Field
The invention relates to the technical field of high polymer materials, in particular to a PVC film and a preparation method thereof.
Background
Along with the rapid development of society, economy and traffic, activities such as various entertainment activities, cultural activities, exhibitions and the like push the closeness of the communication of people to unprecedented height, the infection probability and the transmission path of bacteria or viruses are greatly increased, the living cost is invisibly increased, the normal work and life of people are influenced, even the economic order of the society is disturbed, the economy is reversed, and the antibacterial PVC film can greatly improve the situation. However, in order to expand the application range of the antibacterial PVC film, the antibacterial PVC film also needs to have soft quality, transparency and flame retardant property. However, the soft high-oil product often cannot meet the flame-retardant requirement of building materials, and the application of the soft high-oil product in public places is influenced. Especially on a soft transparent antibacterial film, the traditional inorganic flame retardant cannot be used due to opaqueness, but the environment-friendly phosphate flame retardant with good transparency is used, and because the molecular weight is small and the volatility is high, the dosage is large when the environment-friendly phosphate flame retardant is directly used alone in a high-oil soft product, the environment-friendly phosphate flame retardant can be separated out in a production process at an accelerated speed, so that the surface of the product is fogged, and the transparency is greatly reduced. The transparent antibacterial PVC film has high oil content and high flame retardance, so the application of the transparent antibacterial PVC film is limited.
Disclosure of Invention
The invention aims to overcome the defects of the prior art and provide a soft PVC film with good antibacterial, flame retardant and transparent performances and a preparation method thereof.
In order to achieve the purpose, the technical scheme adopted by the invention is as follows: a PVC film comprises the following components in parts by weight: 100 parts of PVC resin powder, 30-35 parts of common plasticizer, 18-24 parts of flame retardant plasticizer, 0-5 parts of epoxidized soybean oil, 0.5-8 parts of organic antibacterial agent and 0-1 part of inorganic filler; the flame retardant plasticizer comprises tris (2-chloropropyl) phosphate (TCPP) and isopropylated triphenyl phosphate (IPPP).
According to the invention, by selecting the organic transparent antibacterial raw materials and combining different types of flame retardant plasticizers, the problems of large dosage of inorganic flame retardant with good opacity and transparency, easy precipitation during production and fogging of the product surface are solved, and meanwhile, by selecting the proportion of each component, high oil content and high flame retardant property are considered, and the application field of the PVC film is expanded.
Preferably, the PVC film comprises the following ingredients in parts by weight: 100 parts of PVC resin powder, 30-35 parts of common plasticizer, 18-20 parts of flame retardant plasticizer, 1-3 parts of epoxidized soybean oil, 1-3 parts of organic antibacterial agent and 0.5-1 part of inorganic filler. The inorganic filler is added, so that the product fogging phenomenon caused by slight precipitation and accumulation on the surface of the calendering wheel during long-time production can be improved. In addition, when the proportion of the components is compounded according to the scheme, the flame retardant performance of the prepared PVC film can reach GB 8624-2012 flame retardant B1 level, the light transmittance refers to ANSI Z26.1 standard, the light transmittance can reach 80%, and the Shore hardness is less than or equal to 90HA.
Preferably, the PVC film comprises the following ingredients in parts by weight: 100 parts of PVC resin powder, 35 parts of common plasticizer, 18 parts of flame retardant plasticizer, 2 parts of epoxidized soybean oil, 2 parts of organic antibacterial agent and 0.8 part of inorganic filler. The applicant of the invention proves through experiments that the PVC film prepared according to the proportion has the optimal comprehensive performance. The PVC film prepared according to the proportion has the optimal comprehensive performance.
Preferably, the PVC film further comprises 1 to 3 parts of a pigment.
Preferably, the average polymerization degree of the PVC resin powder is 800-1300; the common plasticizer comprises at least one of diisononyl phthalate (DINP), dioctyl terephthalate (DOTP), trioctyl trimellitate (TOTM), diisodecyl phthalate (DIDP), di (2-propylheptyl) phthalate (DPHP) and polyester plasticizers; the organic antimicrobial agent comprises 4,5-dichloro-N-octyl-4-isothiazolin-3-one; the inorganic filler contains nanoscale talcum powder with the molecular formula of Mg 3 [Si 4 O 10 ](OH) 2 。
Preferably, in the flame retardant plasticizer, the mass ratio of the tris (2-chloropropyl) phosphate to the isopropylated triphenyl phosphate is as follows: tris (2-chloropropyl) phosphate isopropylated triphenyl phosphate =1.5 to 2.5. TCPP: when the proportion of IPPP is larger than the above proportion, although better flame retardant performance can be obtained, TCPP has poor compatibility, and precipitation is serious in the production process when the proportion is larger than the above proportion. When the proportion is less than the above range, the TCPP content is low, the IPPP content is high, and the flame retardant property of the IPPP is relatively poor, so that the flame retardant requirement cannot be met.
Meanwhile, the invention also provides a preparation method of the PVC film, which comprises the following steps: mixing materials in a mixer, plasticating in a planetary extruder or an internal mixer, mixing the materials in a double-roll open mill, filtering in a filter, calendering by a calendering wheel, embossing by an embossing wheel, cooling, slitting and rolling to obtain the PVC film.
Preferably, the mixing temperature is not higher than 130 ℃, the filtering temperature is not higher than 190 ℃, the temperature of the calendering wheel is 160-220 ℃, the speed of the calendering wheel is 15-80 m/min, the cooling temperature is 10-50 ℃, and the rolling speed is 15-110 m/min. The thickness of the PVC film prepared by the method is 0.2-0.4 mm.
Compared with the prior art, the invention has the beneficial effects that: the invention selects the organic antibacterial agent with excellent transparency and antibacterial property aiming at the soft transparent flame-retardant antibacterial PVC film, and simultaneously matches with different types of flame retardants to select the proportion of the flame retardants, thereby improving the precipitation problem caused by large required dosage under high oil content, and improving the product fogging phenomenon caused by slight precipitation and accumulation on the surface of a calendering wheel during long-time production by using the nanoscale inorganic material, so that the prepared PVC film has good transparency, flame retardance, antibacterial property and mechanical property.
Drawings
FIG. 1 is a flow chart of the preparation of PVC films described in examples 1-6.
Detailed Description
To better illustrate the objects, aspects and advantages of the present invention, the present invention will be further described with reference to the accompanying drawings and specific embodiments.
Examples 1 to 6
The formulations of the examples, examples 1-6, of the PVC film of the present invention are shown in Table 1, and the preparation method is as follows: mixing materials in a mixer at the mixing temperature of not higher than 120 ℃, plasticating in a planetary extruder, mixing the materials in a double-roll mill, filtering in a filter at the filtering temperature of not higher than 170 ℃, calendering by a calendering wheel at the temperature of 200 ℃ and 15m/min, embossing by an embossing wheel, cooling, slitting by a cooling wheel at the temperature of 20 ℃, and rolling at the speed of 25m/min to obtain the PVC film. The thickness of the PVC film prepared by the method is 0.3mm.
Comparative examples 1 to 3
Comparative examples 1 to 3 are PVC films whose formulations are shown in Table 1 and whose preparation is the same as in examples 1 to 6.
Table 1 formula table (parts by weight)
The performance tests of the examples 1 to 6 and the comparative examples 1 to 3 are carried out, wherein the antibacterial property test standard is ISO 22196. The test results are shown in table 2.
Table 2 results of performance testing
As can be seen from table 2, comparative example 3, which does not contain TCPP, has a significantly poorer flame retardant property than other solutions, comparative example 2, which does not contain IPPP, has a significantly lower light transmittance than the PVC film of the present invention, while comparative example 1, which contains too low of a general plasticizer, contains a relatively higher amount of a flame retardant plasticizer, resulting in a lower transparency of the PVC film. In conclusion, the contents of the common plasticizer and the flame retardant plasticizer and the components of the flame retardant plasticizer have great influence on the flame retardance and the light transmittance of the PVC film, and good comprehensive performance can be obtained only when the contents of all the components are within the range disclosed by the invention.
Finally, it should be noted that the above embodiments are only used for illustrating the technical solutions of the present invention and not for limiting the protection scope of the present invention, and although the present invention is described in detail with reference to the preferred embodiments, it should be understood by those skilled in the art that modifications or equivalent substitutions can be made to the technical solutions of the present invention without departing from the spirit and scope of the technical solutions of the present invention.
Claims (8)
1. The PVC film is characterized by comprising the following components in parts by weight: 100 parts of PVC resin powder, 30-35 parts of common plasticizer, 18-20 parts of flame retardant plasticizer, 1-3 parts of epoxidized soybean oil, 1-3 parts of organic antibacterial agent and 0.5-1 part of inorganic filler; the flame-retardant plasticizer comprises tris (2-chloropropyl) phosphate and isopropylated triphenyl phosphate.
2. The PVC film of claim 1, comprising the following ingredients in parts by weight: 100 parts of PVC resin powder, 35 parts of common plasticizer, 18 parts of flame retardant plasticizer, 2 parts of epoxidized soybean oil, 2 parts of organic antibacterial agent and 0.8 part of inorganic filler.
3. The PVC film of claim 1, further comprising 1 to 3 parts of a pigment.
4. The PVC film according to claim 1, wherein the average polymerization degree of the PVC resin powder is 800 to 1300; the common plasticizer comprises at least one of diisononyl phthalate, dioctyl terephthalate, trioctyl trimellitate, diisodecyl phthalate, di (2-propyl heptyl) phthalate and polyester plasticizers; the organic antimicrobial agent comprises 4,5-dichloro-N-octyl-4-isothiazolin-3-one; the inorganic filler comprises nanoscale talc.
5. The PVC film according to claim 1, wherein the flame retardant plasticizer comprises tris (2-chloropropyl) phosphate and isopropylated triphenyl phosphate in a mass ratio of: tris (2-chloropropyl) phosphate isopropylated triphenyl phosphate =1.5 to 2.5.
6. A process for the preparation of the PVC film according to any one of claims 1 to 5, characterized in that it comprises: mixing materials in a mixer, plasticating in a planetary extruder or an internal mixer, mixing the materials in a double-roll open mill, filtering in a filter, calendering by a calendering wheel, embossing by an embossing wheel, cooling, slitting and rolling to obtain the PVC film.
7. The process for preparing PVC film according to claim 6, wherein the mixing temperature is not higher than 130 ℃, the filtration temperature is not higher than 190 ℃, the temperature of the calender roll is 160-220 ℃, the speed of the calender roll is 15-80 m/min, the cooling temperature is 10-50 ℃, and the winding speed is 15-110 m/min.
8. The method for preparing the PVC film according to claim 7, wherein the thickness of the PVC film prepared by the method is 0.2 to 0.4mm.
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CN110835445A (en) * | 2019-12-19 | 2020-02-25 | 广州雷诺丽特塑料有限公司 | Low-temperature-resistant PVC (polyvinyl chloride) film and preparation method thereof |
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