CN107815006A - Breathable polyethylene film and preparation method thereof - Google Patents
Breathable polyethylene 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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- 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
- C08J2401/00—Characterised by the use of cellulose, modified cellulose or cellulose derivatives
- C08J2401/02—Cellulose; Modified cellulose
- C08J2401/04—Oxycellulose; Hydrocellulose
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- C08J—WORKING-UP; GENERAL PROCESSES OF COMPOUNDING; AFTER-TREATMENT NOT COVERED BY SUBCLASSES C08B, C08C, C08F, C08G or C08H
- C08J2475/00—Characterised by the use of polyureas or polyurethanes; Derivatives of such polymers
- C08J2475/04—Polyurethanes
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- 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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- C08K—Use of inorganic or non-macromolecular organic substances as compounding ingredients
- C08K5/00—Use of organic ingredients
- C08K5/04—Oxygen-containing compounds
- C08K5/09—Carboxylic acids; Metal salts thereof; Anhydrides thereof
- C08K5/098—Metal salts of carboxylic acids
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- 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
- C08K5/56—Organo-metallic compounds, i.e. organic compounds containing a metal-to-carbon bond
- C08K5/57—Organo-tin compounds
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- 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
- C08K7/00—Use of ingredients characterised by shape
- C08K7/22—Expanded, porous or hollow particles
- C08K7/24—Expanded, porous or hollow particles inorganic
- C08K7/26—Silicon- containing compounds
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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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Abstract
The invention discloses a kind of preparation method of breathable polyethylene film, comprise the following steps：(1) by calcium carbonate, organic solvent and titanate coupling agent ultrasonic disperse, drying, modified calcium carbonate is obtained；(2) modified calcium carbonate, micro nanocrystalline cellulose granules, porous konilite, polyethylene, polyurethanes, dibutyitin maleate and stearic acid sodium are blended, extrusion；(3) extrudate is rolled, biaxial tension；Wherein, the mass ratio of modified calcium carbonate, micro nanocrystalline cellulose granules and porous konilite is 4:1‑2:0.6‑0.8.The breathable polyethylene film both has good tensile strength, has good gas permeability again, and preparation method is simple, it is easy to accomplish.
Description
Technical field
The present invention relates to breathable films, in particular it relates to breathable polyethylene film and preparation method thereof.
Background technology
Any packaging material includes plastic sheeting or edible film, and oxygen, nitrogen, carbon dioxide and water are steamed
The permeability measure of gas is particularly significant, and the packaging material particularly for preserving fruit and vegetable utilizing, its gas permeability is extremely important, because
Film with Suitable breathable, the physiological metabolism after fruits and vegetables could be obtained and play certain regulating and controlling effect, so as to improve fruit
The edible quality of vegetable, the frame goods life-span for extending fruits and vegetables, on the other hand, in order to obtain the material with fine air permeability, people are carried out
Extensive research.
Chinese patent application 201110203184.8 discloses composition and its preparation side of a kind of low Air permenbility ventilated membrane
Method, its component include：Polyolefin resin mixture, Air permenbility conditioning agent, surface be modified micro inorganic particle, antioxidant,
Lubricant and coupling agent.It the advantage is that the mechanical property of ventilated membrane can be improved by receiving micron inorganic filler, while surface is coupled
Modified inorganic particulate adds the compatibility with polyolefin base resin, but is disadvantageous in that high addition (30%-
55%) micron inorganic particulate can not be dispersed in matrix resin well, so as to have impact on the ventilative of thin-film material
Uniformity.
Chinese patent application 201110125458.6 discloses a kind of polyolefin film and preparation method thereof, its component bag
Include：Vistanex, pore former and extractant.It the advantage is that the structure of polypropylene/olefin film prepared by used conventional wet
It is small, quantity is more, but it uses the extraction process of two step high volume percentage concentration, and its extractant is N, N '-dimethyl formyl
Amine, dichloromethane, chloroform etc. belong to high pollution, toxic solvent, can cause huge injury to human body and environment.
Chinese patent application 201710110501.9 discloses a kind of gas permeability laminated film and preparation method thereof, and this is compound
Film is prepared by the component of following percentage by weight：60%-82% vistanex polymer, 2%-8% is micro-nano
Crystalline cellulose particle, 0.4%-1% antioxidant, 15%-30% dispersants, 0.1%-0.5% lubricants, 0.2%-1% couplings
Agent.Its preparation method is as follows：Micro nanocrystalline cellulose aqueous dispersions and coupling agent are uniformly dispersed；It is equal to add dispersant
Even and dry pretreated filler；Resulting pretreated filler, vistanex, antioxidant, lubricant are added to double spiral shells
In bar extruder, by melting extrusion, cooling and gas permeability laminated film constituent is granulated to obtain, hot calender prepares flat film；
Immerse in cleaning agent, ultrasound, dry again；Biaxial tension simultaneously carries out thermal finalization processing, obtains gas permeability laminated film.The laminated film
Permeability is efficient, good mechanical performance.Shortcoming is to need to immerse in cleaning agent, and processing procedure is cumbersome.
Therefore, it is highly desirable to provide a kind of preparation method simply and there is the film of good gas permeability.
The content of the invention
It is an object of the invention to provide a kind of breathable polyethylene film, the breathable polyethylene film both has good tension
Intensity, there is good gas permeability again, and preparation method is simple, it is easy to accomplish.
To achieve these goals, the invention provides the preparation method of breathable polyethylene film, comprise the following steps：
(1) by calcium carbonate, organic solvent and titanate coupling agent ultrasonic disperse, drying, modified calcium carbonate is obtained；(2) will modified carbonic acid
Calcium, micro nanocrystalline cellulose granules, porous konilite, polyethylene, polyurethanes, dibutyitin maleate and stearic acid sodium
Blending, extrusion；(3) extrudate is rolled, biaxial tension；Wherein, modified calcium carbonate, micro nanocrystalline cellulose granules and more
The mass ratio of hole konilite is 4:1-2:0.6-0.8.The present invention also provides one kind and is prepared into according to previously described preparation method
The breathable polyethylene film arrived.
Pass through above-mentioned technical proposal, the present invention to calcium carbonate by being modified, further through by modified calcium carbonate, micro-nano
Crystalline cellulose particle, porous konilite are matched and are added in the film preparation raw material that polyethylene is matrix, by extruding,
Calendering, stretch processes, it is prepared for good and with fine air permeability film, preparation method letter with tensile strength
It is single, it is easy to accomplish, there is preferable promotional value.
Other features and advantages of the present invention will be described in detail in subsequent specific embodiment part.
Embodiment
The embodiment of the present invention is described in detail below.It is it should be appreciated that described herein specific
Embodiment is merely to illustrate and explain the present invention, and is not intended to limit the invention.
The end points of disclosed scope and any value are not limited to the accurate scope or value herein, these scopes or
Value should be understood to comprising the value close to these scopes or value.For number range, between the endpoint value of each scope, respectively
It can be combined with each other between the endpoint value of individual scope and single point value, and individually between point value and obtain one or more
New number range, these number ranges should be considered as specific open herein.
The invention provides the preparation method of breathable polyethylene film, comprise the following steps：(1) by calcium carbonate, You Jirong
Agent and titanate coupling agent ultrasonic disperse, drying, obtain modified calcium carbonate；(2) by modified calcium carbonate, micro nanocrystalline cellulose grain
Sub, porous konilite, polyethylene, polyurethanes, dibutyitin maleate and the blending of stearic acid sodium, extrusion；(3) will extrusion
Thing is rolled, biaxial tension；Wherein, the mass ratio of modified calcium carbonate, micro nanocrystalline cellulose granules and porous konilite is
4:1-2:0.6-0.8。
Pass through above-mentioned technical proposal, the present invention to calcium carbonate by being modified, further through by modified calcium carbonate, micro-nano
Crystalline cellulose particle, porous konilite are matched and are added in the film preparation raw material that polyethylene is matrix, by extruding,
Calendering, stretch processes, it is prepared for good and with fine air permeability film, preparation method letter with tensile strength
It is single, it is easy to accomplish, there is preferable promotional value.
In the above-mentioned technical solutions, as long as the film with fine air permeability can be obtained according to said ratio, for each
The addition of component, those skilled in the art can be adjusted in relative broad range.In order that film both has good tension
Intensity, there is good gas permeability again, it is preferable that relative to the polyethylene of 100 parts by weight, modified calcium carbonate, the micro-nano of addition
The total weight parts of rice crystalline cellulose particle and porous konilite are 22-28 parts.
For the actual conditions of the preparation technology of the present invention, those skilled in the art can be adjusted flexibly, in order to improve material
Tensile strength, and make film that there is good gas permeability, and reduce the viscous bar phenomenon in extrusion process, it is preferable that step (3)
The condition of middle calendering includes：By extrudate 180-210 DEG C with 20t-40t pressure under carry out hot calender.
For the actual conditions of the preparation technology of the present invention, those skilled in the art can be adjusted flexibly, in order to improve material
Tensile strength, and make film that there is good gas permeability, it is preferable that the condition of biaxial tension includes：By what is obtained after calendering
Film carries out biaxial tension, stretching ratio 1.2-1.8, then carries out thermal finalization processing at 130-160 DEG C, when thermal finalization is handled
Between be 5-15min.
Modification for calcium carbonate, those skilled in the art can be adjusted in relative broad range, in order to improve carbon modified
Sour calcium and the gas permeability that film can be improved after micro nanocrystalline cellulose granules, porous konilite proportioning, do not reduce film
Tensile strength, it is preferable that in step (1), the mass ratio of calcium carbonate, organic solvent and titanate coupling agent is 1:2-3:0.4-
0.6。
The concrete technology of modification for calcium carbonate, those skilled in the art can be adjusted in relative broad range, in order to
Modified calcium carbonate is improved with the gas permeability of film can be improved after micro nanocrystalline cellulose granules, porous konilite proportioning, not
Reduce the tensile strength of film, it is preferable that the ultrasonic disperse time is 10-20min, and drying temperature is 40-90 DEG C.
In the above-mentioned technical solutions, titanate coupling agent can be selected in relative broad range, in order to improve modified carbonic acid
Calcium and the gas permeability that film can be improved after micro nanocrystalline cellulose granules, porous konilite proportioning, do not reduce the anti-of film
Tensile strength, it is preferable that titanate coupling agent is the iso stearyl titanate esters of isopropyl three and/or the caprylyl titanate esters of isopropyl three.
In the above-mentioned technical solutions, organic solvent can be selected in relative broad range, it is preferable that organic solvent is first
One or more in alcohol, ethanol, propane diols, diethylene glycol, acetone, tetrahydrofuran, pentaerythrite.
Certainly, can be adjusted for the addition of each component, those skilled in the art in relative broad range, in order that
To film there is good tensile strength and gas permeability, it is preferable that it is in parts by weight, modified relative to 100 parts of polyethylene
16 parts of calcium carbonate, micro nanocrystalline cellulose granules 4-8 parts, porous konilite 2.4-3.2 parts, polyurethanes 3-6 parts, Malaysia
Sour dibutyl tin 1-2 parts, stearic acid sodium 3-5 parts.
The weight average molecular weight of weight average molecular weight, polyurethanes for polyethylene can be adjusted in relative broad range
It is whole, in order to improve the tensile strength of film, it is preferable that the weight average molecular weight of polyethylene is 14000-28000, polyurethanes
Weight average molecular weight be 13000-20000.
Wherein, in order that obtained film has good tensile strength and gas permeability, it is preferable that micro nanocrystalline cellulose
The particle diameter distribution of particle is 100nm-50 μm.
Wherein, in order that obtained film has good tensile strength and gas permeability, it is preferable that porous konilite is put down
It is a diameter of to be not more than 0.8 μm.
For the blending condition in step (2), those skilled in the art can be adjusted in relative broad range, in order to improve
The uniformity of mixing, it is preferable that in step (2)：Blending temperature is 180-195 DEG C, mixing time 30-40min.
Further, in order to improve the tensile strength of film, it is preferable that the extrusion temperature in step (2) is 190-210
℃。
The present invention also provides a kind of breathable polyethylene film being prepared according to previously described preparation method.The film
Both with tensile strength and with fine air permeability, it is highly suitable as the packaging material of fruits and vegetables.
The present invention will be described in detail by way of examples below.
Polyurethanes is the commercially available product of Langfang Bohai Sea polyurethane Co., Ltd；Micro nanocrystalline cellulose granules are purchased from upper
Think carefully tech materials Co., Ltd in sea；Other are conventional commercial products.
Preparation example 1
In parts by weight, by 1 part of calcium carbonate, 2 parts of ethanol and 0.4 part of caprylyl titanate esters ultrasonic disperse of isopropyl three
20min, in 90 DEG C of drying, obtain modified calcium carbonate.
Preparation example 2
In parts by weight, by 1 part of calcium carbonate, 3 parts of ethanol and 0.6 part of iso stearyl titanate esters ultrasonic disperse of isopropyl three
10min, in 40 DEG C of drying, obtain modified calcium carbonate.
Preparation example 3
In parts by weight, by 1 part of calcium carbonate, 2.5 parts of ethanol and 0.5 part of iso stearyl titanate esters ultrasonic disperse of isopropyl three
15min, in 70 DEG C of drying, obtain modified calcium carbonate.
Embodiment 1
The preparation method of breathable polyethylene film, comprises the following steps：
(1) in parts by weight, by 100 parts of polyethylene (weight average molecular weight 14000), the modification carbonic acid in preparation example 1
16 parts of calcium, 4 parts of micro nanocrystalline cellulose granules (particle diameter distribution be 30-50 μm), porous konilite (average diameter be no more than
0.8 μm) 2.4 parts, 3 parts of polyurethanes (weight average molecular weight 13000-20000), 1 part of dibutyitin maleate and hard
Sour 3 parts of sodium is in 180 DEG C of blendings, mixing time 30min, in 190 DEG C of extrusions；
(2) by extrudate 210 DEG C with 40t pressure under carry out hot calender, by the film obtained after calendering carry out it is two-way
Stretching, stretching ratio 1.8, thermal finalization processing then is carried out at 160 DEG C, thermal finalization processing time is 15min.
Embodiment 2
The preparation method of breathable polyethylene film, comprises the following steps：
(1) in parts by weight, by 100 parts of polyethylene (weight average molecular weight 28000), the modification carbonic acid in preparation example 2
16 parts of calcium, 8 parts of micro nanocrystalline cellulose granules (particle diameter distribution is 100nm-20 μm), (average diameter is little to porous konilite
In 0.8 μm) 3.2 parts, 6 parts of polyurethanes (weight average molecular weight 20000), 2 parts of dibutyitin maleate and stearic acid sodium 5
Part is in 195 DEG C of blendings, mixing time 40min, in 210 DEG C of extrusions；
(2) by extrudate 180 DEG C with 20t pressure under carry out hot calender, by the film obtained after calendering carry out it is two-way
Stretching, stretching ratio 1.2, thermal finalization processing then is carried out at 130 DEG C, thermal finalization processing time is 5min.
Embodiment 3
The preparation method of breathable polyethylene film, comprises the following steps：
(1) in parts by weight, by 100 parts of polyethylene (weight average molecular weight 20000), the modification carbonic acid in preparation example 2
16 parts of calcium, 6 parts of micro nanocrystalline cellulose granules (particle diameter distribution be 10-30 μm), porous konilite (average diameter be no more than
0.8 μm) 2.8 parts, 4.5 parts of polyurethanes (weight average molecular weight 16000), 1.5 parts of dibutyitin maleate and stearic acid
4 parts of sodium is in 188 DEG C of blendings, mixing time 35min, in 200 DEG C of extrusions；
(2) by extrudate 195 DEG C with 30t pressure under carry out hot calender, by the film obtained after calendering carry out it is two-way
Stretching, stretching ratio 1.5, thermal finalization processing then is carried out at 145 DEG C, thermal finalization processing time is 10min.
Embodiment 4
Method according to embodiment 3 prepares breathable polyethylene film, unlike, the modified calcium carbonate 8 in preparation example 3
Part, 3 parts of micro nanocrystalline cellulose granules (particle diameter distribution is that particle diameter distribution is 10-30 μm), (average diameter is not to porous konilite
More than 0.8 μm) 1.5 parts.
Embodiment 5
Method according to embodiment 3 prepares breathable polyethylene film, unlike, the modified calcium carbonate 20 in preparation example 3
Part, 5 parts of micro nanocrystalline cellulose granules (particle diameter distribution is that particle diameter distribution is 10-30 μm), (average diameter is not to porous konilite
More than 0.8 μm) 3.5 parts.
Embodiment 6
Method according to embodiment 3 prepares breathable polyethylene film, unlike, the modified calcium carbonate 4 in preparation example 3
Part, 4 parts of micro nanocrystalline cellulose granules (particle diameter distribution is that particle diameter distribution is 10-30 μm), (average diameter is not to porous konilite
More than 0.8 μm) 0.8 part.
Comparative example 1
Method according to embodiment 3 prepares polyethylene film, unlike, by 16 parts of modified calcium carbonate in preparation example 3
It is changed to unmodified 16 parts of calcium carbonate.
Comparative example 2
Method according to embodiment 3 prepares polyethylene film, unlike, by the modified calcium carbonate of addition, micro nanocrystalline
Cellulose granules and porous konilite are changed to：
8 parts of modified calcium carbonate in preparation example 3, (particle diameter distribution is that particle diameter distribution is 10-30 to micro nanocrystalline cellulose granules
μm) 5 parts, porous 2 parts of konilite (average diameter is no more than 0.8 μm).
Detect example 1
OTR oxygen transmission rate (unit mL/m2, day, standard atmospheric pressure) test and surveyed using the OTR oxygen transmission rate of model 8001
Examination instrument is measured, and corresponding standard is GB/T1038-2000 plastic sheetings and thin slice gas-premeable test method.
Through being detected to the film of the preparation in embodiment 1-6 and comparative example 1-3, find OTR oxygen transmission rate from height to
Low order is successively：Embodiment 5, embodiment 3, embodiment 2, embodiment 1, embodiment 4, embodiment 6, comparative example 2, comparative example
1, wherein, the OTR oxygen transmission rate highest of embodiment 5, it is 2850mL/m2, the oxygen transmission of embodiment 3, embodiment 2 and embodiment 1
Rate approaches, and wherein the OTR oxygen transmission rate of embodiment 3 is 1941mL/m2, the OTR oxygen transmission rate of embodiment 4 and embodiment 6 approaches, real
It is 1610mL/m to apply example 62；The OTR oxygen transmission rate of film is relatively low in comparative example 2, comparative example 1 and comparative example 3, wherein, comparative example 2
OTR oxygen transmission rate be only 1318mL/m2。
Detect example 2
Moisture-vapor transmission (unit mL/m2) test to enter using the water vapor permeation rate testers of model Model 3/33
Row detection, corresponding standard are the measure of GB/T 30412-2013 plastic sheetings and thin slice moisture-vapor transmission.
Through being detected to the film of the preparation in embodiment 1-6 and comparative example 1-3, find moisture-vapor transmission from height
It is successively to low order：Embodiment 5, embodiment 3, embodiment 2, embodiment 1,
Embodiment 4, embodiment 6, comparative example 2, comparative example 1, wherein, the moisture-vapor transmission highest of embodiment 5, it is
9.3mL/m2, the moisture-vapor transmission of embodiment 3, embodiment 2 and embodiment 1 approaches, wherein the moisture-vapor transmission of embodiment 3
For 7.4mL/m2, the moisture-vapor transmission of embodiment 4 and embodiment 6 approaches, and embodiment 6 is 6.5mL/m2；Comparative example 2, comparative example
1 and comparative example 3 in film moisture-vapor transmission it is relatively low, wherein, the moisture-vapor transmission of comparative example 2 is only 4.7mL/m2。
Detect example 3
Tensile strength (unit MPa) parameter is the measure part 1 by GB/T1040.1-2006 plastic tensile performances
Detected.
Through being detected to the film of the preparation in embodiment 1-6 and comparative example 1-3, tensile strength is found from high to low
Order be successively：Comparative example 3, embodiment 3, embodiment 2, embodiment 1, embodiment 6, embodiment 4, embodiment 5, comparative example 1,
Comparative example 2, wherein, the tensile strength highest of comparative example 2 is 21.2MPa, and the tension of embodiment 3, embodiment 2 and embodiment 1 is strong
Degree is close, and wherein the tensile strength of embodiment 3 is 18.8MPa, and the tensile strength of embodiment 4, embodiment 5 and embodiment 6 approaches,
Embodiment 5 is 16.9MPa；The tensile strength of film is relatively low in comparative example 2, comparative example 1, wherein, the tensile strength of comparative example 1 is only
For 11.3MPa.
The preferred embodiment of the present invention described in detail above, still, the present invention are not limited in above-mentioned embodiment
Detail, in the range of the technology design of the present invention, a variety of simple variants can be carried out to technical scheme, this
A little simple variants belong to protection scope of the present invention.
It is further to note that each particular technique feature described in above-mentioned embodiment, in not lance
In the case of shield, can be combined by any suitable means, in order to avoid unnecessary repetition, the present invention to it is various can
The combination of energy no longer separately illustrates.
In addition, various embodiments of the present invention can be combined randomly, as long as it is without prejudice to originally
The thought of invention, it should equally be considered as content disclosed in this invention.
Claims (10)
1. a kind of preparation method of breathable polyethylene film, it is characterised in that comprise the following steps：
(1) by calcium carbonate, organic solvent and titanate coupling agent ultrasonic disperse, drying, modified calcium carbonate is obtained；
(2) by modified calcium carbonate, micro nanocrystalline cellulose granules, porous konilite, polyethylene, polyurethanes, maleic acid
Dibutyl tin and the blending of stearic acid sodium, extrusion；
(3) extrudate is rolled, biaxial tension；
Wherein, the mass ratio of modified calcium carbonate, micro nanocrystalline cellulose granules and porous konilite is 4:1-2:0.6-0.8.
2. preparation method according to claim 1, wherein, relative to the polyethylene of 100 parts by weight, the modification carbonic acid of addition
The total weight parts of calcium, micro nanocrystalline cellulose granules and porous konilite are 22-28 parts.
3. preparation method according to claim 1 or 2, wherein, the condition of calendering includes in step (3)：Extrudate is existed
180-210 DEG C under 20t-40t pressure to carry out hot calender.
4. preparation method according to claim 1 or 2, wherein, the condition of biaxial tension includes：It is thin by what is obtained after calendering
Film carries out biaxial tension, stretching ratio 1.2-1.8, then carries out thermal finalization processing, thermal finalization processing time at 130-160 DEG C
For 5-15min.
5. preparation method according to claim 1 or 2, wherein, in step (1), calcium carbonate, organic solvent and titanate esters are even
The mass ratio for joining agent is 1:2-3:0.4-0.6；And/or the ultrasonic disperse time is 10-20min, drying temperature is 40-90 DEG C.
6. preparation method according to claim 5, wherein,
Titanate coupling agent is the iso stearyl titanate esters of isopropyl three and/or the caprylyl titanate esters of isopropyl three；And/or
Organic solvent is the one or more in methanol, ethanol, propane diols, diethylene glycol, acetone, tetrahydrofuran, pentaerythrite.
7. preparation method according to claim 1 or 2, wherein, it is in parts by weight, modified relative to 100 parts of polyethylene
16 parts of calcium carbonate, micro nanocrystalline cellulose granules 4-8 parts, porous konilite 2.4-3.2 parts, polyurethanes 3-6 parts, Malaysia
Sour dibutyl tin 1-2 parts, stearic acid sodium 3-5 parts；
Preferably, the weight average molecular weight of polyethylene is 14000-28000, and the weight average molecular weight of polyurethanes is 13000-
20000。
8. preparation method according to claim 7, wherein, the particle diameter distribution of micro nanocrystalline cellulose granules is 100nm-50
μm；And/or the average diameter of porous konilite is no more than 0.8 μm.
9. preparation method according to claim 1 or 2, wherein, in step (2)：Blending temperature is 180-195 DEG C, is kneaded
Time is 30-40min；And/or extrusion temperature is 190-210 DEG C.
10. the breathable polyethylene film that the preparation method according to claim any one of 1-9 is prepared.
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| CN201711142868.5A CN107815006A (en) | 2017-11-17 | 2017-11-17 | Breathable polyethylene film and preparation method thereof |
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
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