CN112029173B - Polyethylene breathable film and preparation method thereof - Google Patents
Polyethylene breathable film and preparation method thereof Download PDFInfo
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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
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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
- 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
- C08J2323/04—Homopolymers or copolymers of ethene
- C08J2323/06—Polyethene
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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
- 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
- C08J2423/04—Homopolymers or copolymers of ethene
- C08J2423/06—Polyethene
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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
- 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
- C08J2423/04—Homopolymers or copolymers of ethene
- C08J2423/08—Copolymers of ethene
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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
- C08J2491/00—Characterised by the use of oils, fats or waxes; Derivatives thereof
- C08J2491/06—Waxes
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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
- C08K3/18—Oxygen-containing compounds, e.g. metal carbonyls
- C08K3/24—Acids; Salts thereof
- C08K3/26—Carbonates; Bicarbonates
- C08K2003/265—Calcium, strontium or barium carbonate
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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
- C08K9/00—Use of pretreated ingredients
- C08K9/04—Ingredients treated with organic substances
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- Polymers & Plastics (AREA)
- Organic Chemistry (AREA)
- Compositions Of Macromolecular Compounds (AREA)
- Manufacture Of Porous Articles, And Recovery And Treatment Of Waste Products (AREA)
- Shaping By String And By Release Of Stress In Plastics And The Like (AREA)
Abstract
The invention discloses a polyethylene breathable film and a preparation method thereof, and is characterized by comprising, by mass, 45-55% of calcium carbonate powder, 1-8% of a compatibilizing flow modifier, 1-5% of a processing aid, 0.1-1% of an aging resistant agent, 25-35% of metallocene polyethylene, 5-15% of linear low-density polyethylene and 5-10% of low-density polyethylene; the calcium carbonate powder is calcium carbonate ultrafine powder with the particle diameter smaller than 60nm and subjected to surface modification treatment by a coupling agent, and the compatibilizing flow modifier is Elevast produced by Exxon Mobil chemical industry TM A polymer modifier. The invention adopts the polyethylene blend and combines the corresponding modified calcium carbonate particles and the compatibilization flow modifier, thereby effectively improving the mechanical properties of the breathable film, and having low gram weight and low-temperature toughness. Experiments prove that the breathable film provided by the invention has the gram weight as low as 12gsm, almost keeps unchanged elongation at break at the low temperature of minus 30 ℃, and has good low-temperature toughness.
Description
Technical Field
The invention relates to the technical field of breathable films, in particular to a polyethylene breathable film and a preparation method thereof.
Background
The breathable film is a composite material which takes thermoplastic plastics as a matrix and is filled with high-content inorganic particles, the film is prepared by calendaring, tape casting, blow molding and other methods, and then the microporous film material with fine pore diameters and mutual penetration is further obtained by uniaxial or biaxial stretching. In theory, thermoplastic plastics can be used as matrix resin of the breathable film material, and polyethylene has the characteristics of comfortable and soft hand feeling and good toughness, and is widely used as the breathable film matrix resin material at present.
In the prior art, patent CN101591458A discloses a method for producing a breathable film, wherein a matrix material is mainly made of linear low-density polyethylene and is supplemented with low-density polyethylene to improve the processability of a high-filling breathable film product, and particularly, a metallocene-catalyzed linear low-density polyethylene product is required to be added to improve the processability due to narrower molecular weight distribution and poorer processability. In addition, the breathable film contains highly-filled micron-level and nano-level inorganic fillers, and the inorganic fillers have influence on the mechanical properties of the breathable film, the flatness of the surface, the pore size uniformity of micropores, the porosity and other parameters. In the prior art, although the surface of the dispersant inorganic filler is modified, the toughness of the breathable film is not ideal enough, and particularly in a low-temperature environment, the toughness can be obviously reduced, and the use requirement of the low-temperature environment is difficult to meet. In addition, the thickness of the product is unstable, and the requirement of a low gram weight product is difficult to meet.
Disclosure of Invention
Aiming at the problems in the prior art, the invention aims to provide a polyethylene breathable film with good low-temperature toughness and low gram weight and a preparation method thereof.
In order to achieve the above purpose, the invention adopts the following technical scheme.
The polyethylene breathable film is characterized by being prepared from the following raw materials, by mass, 45-55% of calcium carbonate powder, 1-8% of a compatibilization flow modifier, 1-5% of a processing aid, 0.1-1% of an anti-aging agent, 25-35% of metallocene polyethylene, 5-15% of linear low-density polyethylene and 5-10% of low-density polyethylene; the calcium carbonate powder is calcium carbonate ultrafine powder with the particle diameter smaller than 60nm and subjected to surface modification treatment by a coupling agent, and the compatibilizing flow modifier is Elevast produced by Exxon Mobil chemical industry TM A polymer modifier.
More preferably, the preparation method of the calcium carbonate ultrafine powderThe method comprises the following steps: 1) Heating calcium carbonate powder to 75-80 ℃, adding a coupling agent as a modifier, and uniformly stirring to obtain an intermediate material; 2) Grinding the intermediate material by a grinder, filtering and taking the material by a vacuum pump and a screen after grinding, then delivering the material to a dryer for drying, and carrying out high-speed grinding treatment by a high-speed ball mill after drying to ensure that the particle diameter is less than 60nm and the surface area is 20-25m 2 And/g, obtaining the superfine calcium carbonate powder.
More preferably, the processing aid is a Fischer-Tropsch wax.
More preferably, the anti-aging agent is a mixture of an anti-freezing agent, an antioxidant and a light stabilizer, and the mass ratio of the mixture is 1:0.5-1:0.5-1 in sequence.
More preferably, the metallocene polyethylene has an ethylene content of 80 to 99wt% and a melt flow rate of 2.7 to 10g/10min.
More preferably, the metallocene polyethylene has a melting temperature of 118 to 129℃and a crystallization temperature of 107 to 116 ℃.
More preferably, the linear low density polyethylene resin has a melt flow rate of 2 to 5g/10min.
More preferably, the low-density polyethylene resin has a melt flow rate of 3 to 6g/10min.
A method for preparing a polyethylene breathable film, comprising the steps of: 1) Weighing the raw materials according to the raw material proportion, and uniformly mixing; 2) Melting, extruding and granulating the raw materials by using a double-screw extruder; 3) Extruding, casting, stretching and heat setting the particles obtained by granulation to form a film; the stretching is uniaxial stretching, and the stretching multiplying power is 1.5-1.7.
More preferably, the extrusion casting process is: extruding the raw materials according to the structures of the surface layer, the middle layer and the bottom layer by using a three-layer coextrusion casting machine, wherein the thickness of the surface layer is consistent with that of the bottom layer, and the thickness of the middle layer is more than twice that of the surface layer.
The beneficial effects of the invention are as follows:
the polyethylene blend is adopted and combined with corresponding modified calcium carbonate particles and a compatibilization flow modifier, so that the mechanical property of the breathable film is effectively improved, and the breathable film has low gram weight and low-temperature toughness. Experiments prove that the polyethylene breathable film provided by the invention has the gram weight as low as 12gsm, almost keeps unchanged elongation at break at the low temperature of minus 30 ℃, has excellent low-temperature toughness, meets the use requirements of most low-temperature environments, and has wider application fields.
Detailed Description
The following describes the specific embodiments of the present invention further, so that the technical scheme and the beneficial effects of the present invention are more clear and definite. The following description of the embodiments is illustrative and is intended to be illustrative of the invention and is not to be construed as limiting the invention.
Additional aspects and advantages of the invention will be set forth in part in the description which follows, or may be learned by practice of the invention.
Example 1
The polyethylene breathable film is characterized by being prepared from the following raw materials, by mass, 50% of calcium carbonate powder, 5% of a compatibilizing flow modifier, 4% of a processing aid, 1% of an aging resistant agent, 30% of metallocene polyethylene, 5% of linear low-density polyethylene and 5% of low-density polyethylene.
Wherein the calcium carbonate powder is calcium carbonate ultrafine powder with the particle diameter smaller than 60nm and subjected to surface modification treatment by a coupling agent. The preparation method of the calcium carbonate ultrafine powder comprises the following steps: 1) Heating calcium carbonate powder to 75-80 ℃, adding a coupling agent as a modifier, and uniformly stirring to obtain an intermediate material; 2) Grinding the intermediate material by a grinder, filtering and taking the material by a vacuum pump and a screen after grinding, then delivering the material to a dryer for drying, and carrying out high-speed grinding treatment by a high-speed ball mill after drying to ensure that the particle diameter is less than 60nm and the surface area is 20-25m 2 And/g, obtaining the superfine calcium carbonate powder. In this example, the coupling agent is preferably an aluminate coupling agent, and in other embodiments, the coupling agent is a stearic acid coupling agent or other type of coupling agent, not limited to this example.
The compatibilizing flow modifier is Elevast produced by Exxon Mobil chemical industry TM Polymer modifierHas the functions of capacity increasing and modifying; and the calcium carbonate superfine powder subjected to surface modification treatment by combining the coupling agent can effectively enhance the low-temperature toughness of the polyethylene breathable film and reduce the gram weight of the product.
In this embodiment, the processing aid is preferably a Fischer-Tropsch wax. The aging resistant agent is preferably a mixture of an antifreeze agent, an antioxidant and a light stabilizer, and the mass ratio of the mixture is 1:0.5-1:0.5-1 in sequence. The anti-aging agent has the advantages of ensuring the good low-temperature performance of the breathable film, ensuring the anti-aging agent to be dispersed uniformly in the whole system and being beneficial to the production of low-gram-weight products.
In order to ensure better processability in the production process of the product, the matrix resin of the polyethylene breathable film is a blend of metallocene polyethylene, linear low-density polyethylene and low-density polyethylene. In this example, it is preferable that the metallocene polyethylene has an ethylene content of 80 to 99wt%, a melt flow rate of 2.7 to 10g/10min, a melting temperature of 118 to 129℃and a crystallization temperature of 107 to 116 ℃. Preferably, the linear low density polyethylene has a melt flow rate of 2 to 5g/10min. Preferably, the low density polyethylene has a melt flow rate of 3 to 6g/10min.
In the actual preparation of the polyethylene breathable film, the steps are as follows: 1) Weighing the raw materials according to the raw material proportion, and uniformly mixing; 2) Melting, extruding and granulating the raw materials by using a double-screw extruder; 3) Extruding, casting, stretching and heat setting the particles obtained by granulation to form a film; the stretching was uniaxial stretching, and the stretching ratio was 1.5. Wherein, the extrusion casting process is as follows: extruding the raw materials according to the structures of the surface layer, the middle layer and the bottom layer by using a three-layer coextrusion casting machine, wherein the thickness of the surface layer is consistent with that of the bottom layer, and the thickness of the middle layer is more than twice that of the surface layer.
Example 2-example 5
Examples 2-5 provide polyethylene films prepared in substantially the same manner as in example one, except that the raw material formulation and stretching ratio were different.
Comparative example 1-comparative example 2
Comparative examples 1-2 provide polyethylene films prepared in substantially the same manner as in example one, except that the raw material formulation and stretching ratio were different.
Table 1, example 2-example 5 and comparative examples 1-2, specific raw material ratios and draw ratios
In Table 1, the common calcium carbonate powder was calcium carbonate powder with a particle size of 0.1. Mu.m, and the common flow modifier was CBT-100 functional auxiliary agent produced by Dongguan City, inc. of New Material technology.
In order to better embody the advancement of the present invention, the polyethylene breathable films prepared in examples 1 to 5 and comparative examples 1 to 2 were subjected to performance tests as follows. The test results are shown in Table 2.
Table 2, examples 1 to 5, and comparative examples 1 to 2.
As can be seen from table 2, the breathable films provided by the present invention have a minimum grammage as low as 12gsm; in the aspect of low-temperature toughness maintenance, the elongation at break of the product is almost unchanged at the low temperature of minus 30 ℃; both are far superior to the conventional art. In addition, when the anti-aging agent is a mixture of the antifreeze agent, the antioxidant and the light stabilizer, the anti-aging agent not only ensures more excellent moisture permeability, but also has slower low-temperature toughness attenuation.
From the description of the above principles, it should be understood by those skilled in the art that the present invention is not limited to the above-described embodiments, but is intended to cover modifications and alternatives, which are well known in the art, based on the present invention and defined by the appended claims and their equivalents. The portions of the detailed description that are not presented are all prior art or common general knowledge.
Claims (7)
1. The polyethylene breathable film is characterized by being prepared from the following raw materials, by mass, 45-55% of calcium carbonate powder, 1-8% of a compatibilization flow modifier, 1-5% of a processing aid, 0.1-1% of an anti-aging agent, 25-35% of metallocene polyethylene, 5-15% of linear low-density polyethylene and 5-10% of low-density polyethylene; the calcium carbonate powder is calcium carbonate ultrafine powder with the particle diameter smaller than 60nm and subjected to surface modification treatment by a coupling agent, and the compatibilization flow modifier is an Elevast ™ polymer modifier produced by Ikesen Mobil chemical industry;
the preparation method of the calcium carbonate ultrafine powder comprises the following steps: 1) Heating calcium carbonate powder to 75-80 ℃, adding a coupling agent as a modifier, and uniformly stirring to obtain an intermediate material; 2) Grinding the intermediate material by a grinder, filtering and taking the material by a vacuum pump and a screen after grinding, then delivering the material to a dryer for drying, and carrying out high-speed grinding treatment by a high-speed ball mill after drying to ensure that the particle diameter is less than 60nm and the surface area is 20-25m 2 And/g, obtaining calcium carbonate ultrafine powder;
the preparation method of the polyethylene breathable film comprises the following steps:
1) Weighing the raw materials according to the raw material proportion, and uniformly mixing;
2) Melting, extruding and granulating the raw materials by using a double-screw extruder;
3) Extruding, casting, stretching and heat setting the particles obtained by granulation to form a film; the stretching is uniaxial stretching, and the stretching multiplying power is 1.5-1.7;
the extrusion casting process is as follows: extruding the raw materials according to the structures of the surface layer, the middle layer and the bottom layer by using a three-layer coextrusion casting machine, wherein the thickness of the surface layer is consistent with that of the bottom layer, and the thickness of the middle layer is more than twice that of the surface layer.
2. A polyethylene breathable film according to claim 1, wherein said processing aid is a fischer-tropsch wax.
3. The polyethylene breathable film according to claim 1, wherein the anti-aging agent is a mixture of an anti-freezing agent, an antioxidant and a light stabilizer, and the mass ratio of the mixture is 1:0.5-1:0.5-1 in sequence.
4. A polyethylene breathable film according to claim 1, characterized in that said metallocene polyethylene has an ethylene content of 80-99wt% and a melt flow rate of 2.7-10g/10min.
5. The polyethylene breathable film of claim 4, wherein said metallocene polyethylene has a melting temperature of 118-129 ℃ and a crystallization temperature of 107-116 ℃.
6. A polyethylene breathable film according to claim 1, characterized in that said linear low density polyethylene has a melt flow rate of 2-5g/10min.
7. A polyethylene breathable film according to claim 1, characterized in that said low density polyethylene has a melt flow rate of 3-6g/10min.
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| CN112708190B (en) * | 2020-12-17 | 2022-03-01 | 金发科技股份有限公司 | Breathable film composition special for warm patch and preparation method and application thereof |
| CN113603957B (en) * | 2021-08-06 | 2023-03-24 | 上海紫华薄膜科技有限公司 | Waterproof breathable film and preparation method thereof |
| WO2023056250A1 (en) | 2021-09-30 | 2023-04-06 | Exxonmobil Chemical Patents Inc. | Fluoropolymer-free processing aids for ethylene-based polymers |
| WO2023056207A1 (en) | 2021-09-30 | 2023-04-06 | Exxonmobil Chemical Patents Inc. | Fluorine-free polymer processing aids |
| WO2023149984A1 (en) | 2022-02-07 | 2023-08-10 | Exxonmobil Chemical Patents Inc. | Polyethylene glycol-based polymer processing aids |
| WO2023154744A1 (en) | 2022-02-14 | 2023-08-17 | Exxonmobil Chemical Patents Inc. | Polyethylene glycol-based polymer processing aids |
Citations (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101643559A (en) * | 2009-09-15 | 2010-02-10 | 浙江越韩科技透气材料有限公司 | Ultrathin high porosity film and preparation method thereof |
| CN103009759A (en) * | 2013-01-05 | 2013-04-03 | 南通康达复合材料有限公司 | Method for manufacturing anti-flaming waterproof ventilated cushion |
| CN103496239A (en) * | 2013-09-29 | 2014-01-08 | 佛山华韩卫生材料有限公司 | Special WVTR (water vapour transmission rate) breathable film and production process thereof |
| CN104448514A (en) * | 2014-11-03 | 2015-03-25 | 重庆和泰塑胶股份有限公司 | Breathable resin with high breathability and preparation method of breathable resin |
| CN107739467A (en) * | 2017-10-31 | 2018-02-27 | 尹斓 | One kind is applied to urine pants counterdie polyethylene composition and its manufacturing process |
| CN108715656A (en) * | 2018-05-28 | 2018-10-30 | 池州市锐强新材料有限公司 | A kind of PE/CaCO3Ventilative film master batch and preparation method thereof |
| CN110903537A (en) * | 2019-12-03 | 2020-03-24 | 晋江市兆安科技有限公司 | Breathable film particle, preparation method thereof and breathable film |
-
2020
- 2020-09-09 CN CN202010941356.0A patent/CN112029173B/en active Active
Patent Citations (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101643559A (en) * | 2009-09-15 | 2010-02-10 | 浙江越韩科技透气材料有限公司 | Ultrathin high porosity film and preparation method thereof |
| CN103009759A (en) * | 2013-01-05 | 2013-04-03 | 南通康达复合材料有限公司 | Method for manufacturing anti-flaming waterproof ventilated cushion |
| CN103496239A (en) * | 2013-09-29 | 2014-01-08 | 佛山华韩卫生材料有限公司 | Special WVTR (water vapour transmission rate) breathable film and production process thereof |
| CN104448514A (en) * | 2014-11-03 | 2015-03-25 | 重庆和泰塑胶股份有限公司 | Breathable resin with high breathability and preparation method of breathable resin |
| CN107739467A (en) * | 2017-10-31 | 2018-02-27 | 尹斓 | One kind is applied to urine pants counterdie polyethylene composition and its manufacturing process |
| CN108715656A (en) * | 2018-05-28 | 2018-10-30 | 池州市锐强新材料有限公司 | A kind of PE/CaCO3Ventilative film master batch and preparation method thereof |
| CN110903537A (en) * | 2019-12-03 | 2020-03-24 | 晋江市兆安科技有限公司 | Breathable film particle, preparation method thereof and breathable film |
Non-Patent Citations (1)
| Title |
|---|
| 李青年.薄膜制品设计生产加工新工艺与应用新技术实务全书.2014,第二卷第936页. * |
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