CN113211754A - BOPP high-temperature-resistant protective film and preparation method thereof - Google Patents
BOPP high-temperature-resistant protective film and preparation method thereof Download PDFInfo
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- CN113211754A CN113211754A CN202110620283.XA CN202110620283A CN113211754A CN 113211754 A CN113211754 A CN 113211754A CN 202110620283 A CN202110620283 A CN 202110620283A CN 113211754 A CN113211754 A CN 113211754A
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- 229920006378 biaxially oriented polypropylene Polymers 0.000 title claims abstract description 40
- 239000011127 biaxially oriented polypropylene Substances 0.000 title claims abstract description 40
- 230000001681 protective effect Effects 0.000 title claims abstract description 27
- 238000002360 preparation method Methods 0.000 title claims abstract description 10
- 239000010410 layer Substances 0.000 claims abstract description 59
- 239000011347 resin Substances 0.000 claims abstract description 42
- 229920005989 resin Polymers 0.000 claims abstract description 42
- 239000004743 Polypropylene Substances 0.000 claims abstract description 30
- 229920003023 plastic Polymers 0.000 claims abstract description 30
- -1 polypropylene Polymers 0.000 claims abstract description 30
- 229920001155 polypropylene Polymers 0.000 claims abstract description 30
- 239000002346 layers by function Substances 0.000 claims abstract description 25
- 239000002344 surface layer Substances 0.000 claims abstract description 25
- 239000004033 plastic Substances 0.000 claims abstract description 22
- VYPSYNLAJGMNEJ-UHFFFAOYSA-N Silicium dioxide Chemical compound O=[Si]=O VYPSYNLAJGMNEJ-UHFFFAOYSA-N 0.000 claims abstract description 20
- 239000000741 silica gel Substances 0.000 claims abstract description 15
- 229910002027 silica gel Inorganic materials 0.000 claims abstract description 15
- 239000005871 repellent Substances 0.000 claims abstract description 12
- 238000001125 extrusion Methods 0.000 claims abstract description 8
- JMMZCWZIJXAGKW-UHFFFAOYSA-N 2-methylpent-2-ene Chemical compound CCC=C(C)C JMMZCWZIJXAGKW-UHFFFAOYSA-N 0.000 claims abstract description 7
- 239000011116 polymethylpentene Substances 0.000 claims abstract description 4
- 230000005484 gravity Effects 0.000 claims description 15
- 239000011265 semifinished product Substances 0.000 claims description 9
- 238000002844 melting Methods 0.000 claims description 7
- 239000002994 raw material Substances 0.000 claims description 6
- 238000004804 winding Methods 0.000 claims description 6
- 239000011248 coating agent Substances 0.000 claims description 4
- 238000000576 coating method Methods 0.000 claims description 4
- 238000001816 cooling Methods 0.000 claims description 4
- 239000000463 material Substances 0.000 claims description 4
- 230000008018 melting Effects 0.000 claims description 4
- 229910000831 Steel Inorganic materials 0.000 claims description 3
- 238000003854 Surface Print Methods 0.000 claims description 3
- 238000005266 casting Methods 0.000 claims description 3
- 238000003851 corona treatment Methods 0.000 claims description 3
- 230000004927 fusion Effects 0.000 claims description 3
- 238000007731 hot pressing Methods 0.000 claims description 3
- 238000000034 method Methods 0.000 claims description 3
- 239000011148 porous material Substances 0.000 claims description 3
- 239000000047 product Substances 0.000 claims description 3
- 238000007493 shaping process Methods 0.000 claims description 3
- 239000010959 steel Substances 0.000 claims description 3
- 239000000377 silicon dioxide Substances 0.000 claims 1
- 230000002940 repellent Effects 0.000 abstract description 6
- 230000000694 effects Effects 0.000 abstract description 3
- 238000004040 coloring Methods 0.000 abstract description 2
- IAYPIBMASNFSPL-UHFFFAOYSA-N Ethylene oxide Chemical compound C1CO1 IAYPIBMASNFSPL-UHFFFAOYSA-N 0.000 abstract 1
- 230000002265 prevention Effects 0.000 abstract 1
- 230000002285 radioactive effect Effects 0.000 abstract 1
- 239000003921 oil Substances 0.000 description 4
- 238000012986 modification Methods 0.000 description 2
- 230000004048 modification Effects 0.000 description 2
- 239000005543 nano-size silicon particle Substances 0.000 description 2
- 235000012239 silicon dioxide Nutrition 0.000 description 2
- 230000009286 beneficial effect Effects 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 238000010438 heat treatment Methods 0.000 description 1
- 239000000155 melt Substances 0.000 description 1
- 231100000956 nontoxicity Toxicity 0.000 description 1
- 239000005022 packaging material Substances 0.000 description 1
- 238000006467 substitution reaction Methods 0.000 description 1
Images
Classifications
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
- B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
- B29C48/00—Extrusion moulding, i.e. expressing the moulding material through a die or nozzle which imparts the desired form; Apparatus therefor
- B29C48/001—Combinations of extrusion moulding with other shaping operations
- B29C48/0018—Combinations of extrusion moulding with other shaping operations combined with shaping by orienting, stretching or shrinking, e.g. film blowing
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
- B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
- B29C48/00—Extrusion moulding, i.e. expressing the moulding material through a die or nozzle which imparts the desired form; Apparatus therefor
- B29C48/16—Articles comprising two or more components, e.g. co-extruded layers
- B29C48/18—Articles comprising two or more components, e.g. co-extruded layers the components being layers
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
- B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
- B29C48/00—Extrusion moulding, i.e. expressing the moulding material through a die or nozzle which imparts the desired form; Apparatus therefor
- B29C48/25—Component parts, details or accessories; Auxiliary operations
- B29C48/88—Thermal treatment of the stream of extruded material, e.g. cooling
- B29C48/885—External treatment, e.g. by using air rings for cooling tubular films
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
- B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
- B29C55/00—Shaping by stretching, e.g. drawing through a die; Apparatus therefor
- B29C55/02—Shaping by stretching, e.g. drawing through a die; Apparatus therefor of plates or sheets
- B29C55/023—Shaping by stretching, e.g. drawing through a die; Apparatus therefor of plates or sheets using multilayered plates 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
- 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
- C08J2323/00—Characterised by the use of homopolymers or copolymers of unsaturated aliphatic hydrocarbons having only one carbon-to-carbon double bond; Derivatives of such polymers
- C08J2323/02—Characterised by the use of homopolymers or copolymers of unsaturated aliphatic hydrocarbons having only one carbon-to-carbon double bond; Derivatives of such polymers not modified by chemical after treatment
- C08J2323/10—Homopolymers or copolymers of propene
- C08J2323/12—Polypropene
-
- 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
- C08J2323/00—Characterised by the use of homopolymers or copolymers of unsaturated aliphatic hydrocarbons having only one carbon-to-carbon double bond; Derivatives of such polymers
- C08J2323/02—Characterised by the use of homopolymers or copolymers of unsaturated aliphatic hydrocarbons having only one carbon-to-carbon double bond; Derivatives of such polymers not modified by chemical after treatment
- C08J2323/18—Homopolymers or copolymers of hydrocarbons having four or more carbon atoms
- C08J2323/20—Homopolymers or copolymers of hydrocarbons having four or more carbon atoms having four to nine carbon atoms
-
- 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
- C08J2423/00—Characterised by the use of homopolymers or copolymers of unsaturated aliphatic hydrocarbons having only one carbon-to-carbon double bond; Derivatives of such polymers
- C08J2423/02—Characterised by the use of homopolymers or copolymers of unsaturated aliphatic hydrocarbons having only one carbon-to-carbon double bond; Derivatives of such polymers not modified by chemical after treatment
- C08J2423/10—Homopolymers or copolymers of propene
- C08J2423/12—Polypropene
-
- 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
- C08J2423/00—Characterised by the use of homopolymers or copolymers of unsaturated aliphatic hydrocarbons having only one carbon-to-carbon double bond; Derivatives of such polymers
- C08J2423/02—Characterised by the use of homopolymers or copolymers of unsaturated aliphatic hydrocarbons having only one carbon-to-carbon double bond; Derivatives of such polymers not modified by chemical after treatment
- C08J2423/18—Homopolymers or copolymers of hydrocarbons having four or more carbon atoms
- C08J2423/20—Homopolymers or copolymers of hydrocarbons having four or more carbon atoms having four to nine carbon atoms
Abstract
The invention discloses a BOPP high-temperature-resistant protective film and a preparation method thereof, and the BOPP high-temperature-resistant protective film comprises a base layer, wherein the top end of the base layer is provided with a surface layer, the bottom end of the base layer is provided with a functional layer, the base layer, the surface layer and the functional layer form a three-layer co-extrusion structure, the base layer comprises polypropylene resin, silica gel and PMP plastic, the polypropylene resin is biaxially oriented polypropylene resin, the silica gel is edible silica gel, the PMP plastic is methylpentene high-crystalline transparent plastic, the surface layer comprises a polypropylene resin layer and an oil repellent layer, the oil repellent layer is positioned on the outermost layer of the surface layer, and the functional layer comprises PMP plastic and polypropylene resin. PMP plastic can be steamed and disinfected for 400 times at 130 ℃ without fogging, can be disinfected for 1 hour at 160 ℃ for 50 times, can be disinfected at more than 200 ℃, can also be disinfected by ethylene oxide and radioactive rays, and can achieve the effects of high temperature resistance and fingerprint coloring prevention.
Description
Technical Field
The invention relates to the technical field of packaging materials, in particular to a BOPP high-temperature-resistant protective film and a preparation method thereof.
Background
BOPP is a abbreviation for "biaxialyorientpolypropylene", i.e. biaxially oriented polypropylene film. It is produced by making a melt of high molecular polypropylene into sheet and thick film through a long and narrow head, then drawing in a special drawing machine at a certain temperature and set speed in two perpendicular directions simultaneously or in a distributed manner, and subjecting to proper cooling or heat treatment or special processing (such as corona, coating, etc.) to obtain the film.
However, at present, a common BOPP protective film generally begins to melt at 80-90 ℃, the use temperature range is low, and the surface of the conventional BOPP protective film at normal temperature is soft in material, so that a large number of fingerprints are easy to appear after the conventional BOPP protective film is frequently taken up, and the demand of people can not be met gradually.
An effective solution to the problems in the related art has not been proposed yet.
Disclosure of Invention
The invention aims to provide a BOPP high-temperature-resistant protective film and a preparation method thereof, and aims to solve the problems in the background technology.
In order to achieve the purpose, the invention provides the following technical scheme: the utility model provides a BOPP high temperature resistant protection film, includes the basic unit, the top of basic unit is equipped with the top layer, the bottom of basic unit is equipped with the functional layer, basic unit, top layer with the three-layer structure of coextruding is constituteed to the functional layer.
Further, the base layer comprises polypropylene resin, silica gel and PMP plastic, wherein the specific gravity of the polypropylene resin is 20% -30%, the specific gravity of the PMP plastic is 40% -60%, and the specific gravity of the silica gel is 10% -20%.
Further, the polypropylene resin is biaxially oriented polypropylene resin, the silica gel is food grade silica gel, and the PMP plastic is methylpentene high-crystalline transparent plastic.
Further, the surface layer comprises a polypropylene resin layer and an oil repellent layer, and the oil repellent layer is located on the outermost layer of the surface layer.
Furthermore, the polypropylene resin is biaxially oriented polypropylene resin, and the oil-repellent layer is made of nano silicon dioxide material.
Furthermore, the functional layer comprises PMP plastic and polypropylene resin, wherein the specific gravity of the PMP plastic is 50% -60%, and the specific gravity of the polypropylene resin is 40% -50%.
Furthermore, the PMP plastic is a methylpentene high-crystalline transparent plastic, and the polypropylene resin is a biaxially oriented polypropylene resin.
The preparation method of the BOPP high-temperature-resistant protective film comprises the following specific steps:
the method comprises the following steps: raw materials of each component required by the base layer, the surface layer and the functional layer are mixed according to the proportion requirement and are respectively and fully mixed uniformly;
step two: extruding and casting sheets: hot-melting and plasticizing the uniformly mixed raw materials of each layer in respective extruders, wherein the processing temperature of the base layer and the functional layer is 260-300 ℃, and the processing temperature of the surface layer is 240-260 ℃; the plasticized resin respectively extrudes the base layer, the surface layer and the functional layer through three T-shaped die heads, and the base layer, the surface layer and the functional layer are attached to the surface of a cold roll after being distributed in parallel to form a sheet with uniform thickness;
step three: the three sheets are subjected to hot melting extrusion through a hot pressing roller, are subjected to preheating stretching after extrusion fusion, are shaped and cooled to finish longitudinal stretching and transverse stretching step by step, and the pore size is controlled by adjusting the stretching ratio and the forming temperature to obtain a formed film;
step four: cooling and shaping the formed film by PRS, measuring the thickness, automatically controlling the thickness by an APC system, coating an oil-thinning layer by corona treatment to improve the surface printing performance, and obtaining a semi-finished product;
step five: and winding the semi-finished product on a steel core of a winding machine, and finally slitting the semi-finished product by a slitting machine according to the width required by a customer to obtain a finished product roll of the BOPP high-temperature-resistant protective film.
Compared with the prior art, the invention has the following beneficial effects:
in the BOPP high-temperature-resistant protective film and the preparation method thereof, PMP high-crystalline transparent plastic and polypropylene resin are mainly adopted for forming, so that the BOPP high-temperature-resistant protective film has the effects of lower hardness, no toxicity and high temperature resistance, the melting point temperature of the film is greatly improved, the BOPP high-temperature-resistant protective film can resist the high temperature of 200 ℃, and the BOPP high-temperature-resistant protective film is provided with an oil-repellent layer, has the effect of fingerprint coloring resistance and is suitable for popularization and application.
Drawings
In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings needed in the embodiments will be briefly described below, and it is obvious that the drawings in the following description are only some embodiments of the present invention, and it is obvious for those skilled in the art to obtain other drawings without creative efforts.
Fig. 1 is a schematic structural diagram of a BOPP high temperature resistant protective film and a preparation method thereof.
Reference numerals:
1. a base layer; 2. a surface layer; 3. and a functional layer.
Detailed Description
The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all embodiments, and all other embodiments obtained by a person of ordinary skill in the art without creative efforts based on the embodiments of the present invention belong to the protection scope of the present invention.
In the description of the present invention, it should be noted that the terms "top", "bottom", "one side", "the other side", "front", "back", "middle part", "inside", "top", "bottom", etc. indicate orientations or positional relationships based on the orientations or positional relationships shown in the drawings, and are only for convenience of describing the present invention and simplifying the description, but do not indicate or imply that the referred device or element must have a specific orientation, be constructed in a specific orientation, and be operated, and thus, should not be construed as limiting the present invention; the terms "first," "second," and "third" are used for descriptive purposes only and are not to be construed as indicating or implying relative importance; furthermore, unless expressly stated or limited otherwise, the terms "mounted," "connected," and "connected" are to be construed broadly, as they may be fixedly connected, detachably connected, or integrally connected, for example; can be mechanically or electrically connected; they may be connected directly or indirectly through intervening media, or they may be interconnected between two elements. The specific meanings of the above terms in the present invention can be understood in specific cases to those skilled in the art.
Referring to fig. 1, the BOPP high temperature resistant protective film according to the embodiment of the present invention includes a base layer 1, a surface layer 2 is disposed on a top end of the base layer 1, a functional layer 3 is disposed on a bottom end of the base layer 1, and the base layer 1, the surface layer 2, and the functional layer 3 form a three-layer co-extrusion structure.
According to the scheme of the invention, the base layer 1 comprises polypropylene resin, silica gel and PMP plastic, wherein the specific gravity of the polypropylene resin is 20-30%, the specific gravity of the PMP plastic is 40-60%, and the specific gravity of the silica gel is 10-20%.
According to the scheme of the invention, the polypropylene resin is biaxially oriented polypropylene resin, the silica gel is food grade silica gel, and the PMP plastic is methylpentene high-crystalline transparent plastic.
According to the above aspect of the present invention, the surface layer 2 includes a polypropylene resin layer and an oil repellent layer, and the oil repellent layer is located on the outermost layer of the surface layer 2.
According to the scheme of the invention, the polypropylene resin is biaxially oriented polypropylene resin, and the oil-repellent layer is made of nano silicon dioxide material.
According to the scheme of the invention, the functional layer 3 comprises PMP plastic and polypropylene resin, wherein the specific gravity of the PMP plastic is 50-60%, and the specific gravity of the polypropylene resin is 40-50%.
According to the above scheme of the invention, the PMP plastic is a methylpentene high-crystalline transparent plastic, and the polypropylene resin is a biaxially oriented polypropylene resin.
The preparation method of the BOPP high-temperature-resistant protective film provided by the embodiment of the invention comprises the following specific steps:
the method comprises the following steps: raw materials of each component required by the base layer 1, the surface layer 2 and the functional layer 3 are mixed according to the proportioning requirement and are respectively and fully mixed uniformly;
step two: extruding and casting sheets: hot-melting and plasticizing the uniformly mixed raw materials of each layer in respective extruders, wherein the processing temperature of the base layer 1 and the functional layer 3 is 260-300 ℃, and the processing temperature of the surface layer 2 is 240-260 ℃; the plasticized resin respectively extrudes the base layer 1, the surface layer 2 and the functional layer 3 through three T-shaped die heads, and the base layer, the surface layer and the functional layer are attached to the surface of a cold roll after being distributed in parallel to form a sheet with uniform thickness;
step three: the three sheets are subjected to hot melting extrusion through a hot pressing roller, are subjected to preheating stretching after extrusion fusion, are shaped and cooled to finish longitudinal stretching and transverse stretching step by step, and the pore size is controlled by adjusting the stretching ratio and the forming temperature to obtain a formed film;
step four: cooling and shaping the formed film by PRS, measuring the thickness, automatically controlling the thickness by an APC system, coating an oil-thinning layer by corona treatment to improve the surface printing performance, and obtaining a semi-finished product;
step five: and winding the semi-finished product on a steel core of a winding machine, and finally slitting the semi-finished product by a slitting machine according to the width required by a customer to obtain a finished product roll of the BOPP high-temperature-resistant protective film.
Finally, it should be noted that: although the present invention has been described in detail with reference to the foregoing embodiments, those skilled in the art will understand that various changes, modifications and substitutions can be made without departing from the spirit and scope of the invention as defined by the appended claims. Any modification, equivalent replacement, or improvement made within the spirit and principle of the present invention should be included in the protection scope of the present invention.
Claims (8)
1. The utility model provides a BOPP high temperature resistant protection film, includes basic unit (1), its characterized in that: the top of basic unit (1) is equipped with top layer (2), the bottom of basic unit (1) is equipped with functional layer (3), basic unit (1), top layer (2) and functional layer (3) constitute the three-layer structure of coextruding.
2. The BOPP high-temperature-resistant protective film according to claim 1, wherein the base layer (1) comprises polypropylene resin, silica gel and PMP plastic, the specific gravity of the polypropylene resin is 20-30%, the specific gravity of the PMP plastic is 40-60%, and the specific gravity of the silica gel is 10-20%.
3. The BOPP high-temperature-resistant protective film as claimed in claim 1, wherein the polypropylene resin is biaxially oriented polypropylene resin, the silica gel is food grade silica gel, and the PMP plastic is methylpentene high-crystalline transparent plastic.
4. A BOPP protective film against high temperature according to claim 1, wherein the surface layer (2) comprises a polypropylene resin layer and an oil-repellent layer, the oil-repellent layer being located on the outermost layer of the surface layer (2).
5. The BOPP high-temperature-resistant protective film as claimed in claim 1, wherein the polypropylene resin is biaxially oriented polypropylene resin, and the oil-repellent layer is made of nano-silica material.
6. The BOPP high temperature resistant protective film according to claim 1, wherein the functional layer (3) comprises PMP plastic and polypropylene resin, the PMP plastic has a specific gravity of 50% to 60%, and the polypropylene resin has a specific gravity of 40% to 50%.
7. The BOPP high temperature resistant protective film according to claim 1, wherein the PMP plastic is a methylpentene high crystalline transparent plastic, and the polypropylene resin is a biaxially oriented polypropylene resin.
8. The preparation method of the BOPP high temperature resistant protective film as claimed in any one of claims 1 to 7, which is characterized by comprising the following specific steps:
the method comprises the following steps: raw materials of each component required by the base layer (1), the surface layer (2) and the functional layer (3) are mixed according to the proportion requirement and are respectively and fully mixed evenly;
step two: extruding and casting sheets: hot-melting and plasticizing the uniformly mixed raw materials of each layer in respective extruders, wherein the processing temperature of the base layer (1) and the functional layer (3) is 260-300 ℃, and the processing temperature of the surface layer (2) is 240-260 ℃; the plasticized resin respectively extrudes the base layer (1), the surface layer (2) and the functional layer (3) through three T-shaped die heads, and the base layer, the surface layer and the functional layer are attached to the surface of a cold roll after being distributed in parallel to form a sheet with uniform thickness;
step three: the three sheets are subjected to hot melting extrusion through a hot pressing roller, are subjected to preheating stretching after extrusion fusion, are shaped and cooled to finish longitudinal stretching and transverse stretching step by step, and the pore size is controlled by adjusting the stretching ratio and the forming temperature to obtain a formed film;
step four: cooling and shaping the formed film by PRS, measuring the thickness, automatically controlling the thickness by an APC system, coating an oil-thinning layer by corona treatment to improve the surface printing performance, and obtaining a semi-finished product;
step five: and winding the semi-finished product on a steel core of a winding machine, and finally slitting the semi-finished product by a slitting machine according to the width required by a customer to obtain a finished product roll of the BOPP high-temperature-resistant protective film.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202110620283.XA CN113211754A (en) | 2021-06-03 | 2021-06-03 | BOPP high-temperature-resistant protective film and preparation method thereof |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202110620283.XA CN113211754A (en) | 2021-06-03 | 2021-06-03 | BOPP high-temperature-resistant protective film and preparation method thereof |
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| CN113211754A true CN113211754A (en) | 2021-08-06 |
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Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101723132A (en) * | 2009-10-22 | 2010-06-09 | 惠州宝柏包装有限公司 | Release BOPP thin film and preparation method thereof |
| CN102952332A (en) * | 2012-10-19 | 2013-03-06 | 芜湖太平洋塑胶有限公司 | High temperature-resistant PP (polypropylene) lunch box and manufacturing process thereof |
| CN107901555A (en) * | 2017-11-22 | 2018-04-13 | 贵州金田新材料科技有限公司 | A kind of BOPP high temperature resistants protective film and preparation method thereof |
| CN111440555A (en) * | 2019-08-09 | 2020-07-24 | 象山激智新材料有限公司 | High-temperature-resistant and easy-to-peel CPP protective film and preparation method thereof |
-
2021
- 2021-06-03 CN CN202110620283.XA patent/CN113211754A/en active Pending
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101723132A (en) * | 2009-10-22 | 2010-06-09 | 惠州宝柏包装有限公司 | Release BOPP thin film and preparation method thereof |
| CN102952332A (en) * | 2012-10-19 | 2013-03-06 | 芜湖太平洋塑胶有限公司 | High temperature-resistant PP (polypropylene) lunch box and manufacturing process thereof |
| CN107901555A (en) * | 2017-11-22 | 2018-04-13 | 贵州金田新材料科技有限公司 | A kind of BOPP high temperature resistants protective film and preparation method thereof |
| CN111440555A (en) * | 2019-08-09 | 2020-07-24 | 象山激智新材料有限公司 | High-temperature-resistant and easy-to-peel CPP protective film and preparation method thereof |
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Application publication date: 20210806 |