CN107674295A - A kind of preparation method of material for ventilated membrane - Google Patents
A kind of preparation method of material for ventilated membrane Download PDFInfo
- Publication number
- CN107674295A CN107674295A CN201711040765.8A CN201711040765A CN107674295A CN 107674295 A CN107674295 A CN 107674295A CN 201711040765 A CN201711040765 A CN 201711040765A CN 107674295 A CN107674295 A CN 107674295A
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- CN
- China
- Prior art keywords
- ventilated membrane
- preparation
- screw extruder
- raw material
- banburying
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
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- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08L—COMPOSITIONS OF MACROMOLECULAR COMPOUNDS
- C08L23/00—Compositions of homopolymers or copolymers of unsaturated aliphatic hydrocarbons having only one carbon-to-carbon double bond; Compositions of derivatives of such polymers
- C08L23/02—Compositions of homopolymers or copolymers of unsaturated aliphatic hydrocarbons having only one carbon-to-carbon double bond; Compositions of derivatives of such polymers not modified by chemical after-treatment
- C08L23/04—Homopolymers or copolymers of ethene
- C08L23/08—Copolymers of ethene
- C08L23/0807—Copolymers of ethene with unsaturated hydrocarbons only containing more than three carbon atoms
- C08L23/0815—Copolymers of ethene with aliphatic 1-olefins
-
- 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
- C08J2323/04—Homopolymers or copolymers of ethene
- C08J2323/08—Copolymers of ethene
-
- 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
-
- 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
-
- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08L—COMPOSITIONS OF MACROMOLECULAR COMPOUNDS
- C08L2203/00—Applications
- C08L2203/16—Applications used for films
-
- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08L—COMPOSITIONS OF MACROMOLECULAR COMPOUNDS
- C08L2205/00—Polymer mixtures characterised by other features
- C08L2205/02—Polymer mixtures characterised by other features containing two or more polymers of the same C08L -group
- C08L2205/025—Polymer mixtures characterised by other features containing two or more polymers of the same C08L -group containing two or more polymers of the same hierarchy C08L, and differing only in parameters such as density, comonomer content, molecular weight, structure
-
- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08L—COMPOSITIONS OF MACROMOLECULAR COMPOUNDS
- C08L2205/00—Polymer mixtures characterised by other features
- C08L2205/03—Polymer mixtures characterised by other features containing three or more polymers in a blend
- C08L2205/035—Polymer mixtures characterised by other features containing three or more polymers in a blend containing four or more polymers in a blend
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- Chemical & Material Sciences (AREA)
- Health & Medical Sciences (AREA)
- Chemical Kinetics & Catalysis (AREA)
- Medicinal Chemistry (AREA)
- Polymers & Plastics (AREA)
- Organic Chemistry (AREA)
- Engineering & Computer Science (AREA)
- Manufacturing & Machinery (AREA)
- Materials Engineering (AREA)
- Extrusion Moulding Of Plastics Or The Like (AREA)
- Processing And Handling Of Plastics And Other Materials For Molding In General (AREA)
Abstract
The invention belongs to the preparation method of breathable plastics preparation field, more particularly to a kind of material for ventilated membrane：Add the raw material into continuous internal mixer after banburying, then pelletizing is extruded by double screw extruder, obtain the material for ventilated membrane.Completed in the banburying stage scattered between plasticizing and resin and inorganic particulate；The stage is transmitted in twin-screw, is discharged the air being mingled with ventilative material as far as possible in the exhaust area of spiro rod section using double screw extruder, influence when avoiding air to ventilative material film forming.
Description
Technical field
The invention belongs to the preparation method of breathable plastics preparation field, more particularly to a kind of material for ventilated membrane.
Background technology
At present, the demand for class product being nursed to adult diaper, mattress etc. gradually increases, and this kind of product needs to use plastics
Breathable films, reach the effect of permeable watertight.And ventilative raw material is unique raw material in breathable films production.
The water pressure resistance performance of the breathable films produced in the market is substantially all in 1500mmH2Below O, also there is lifting
Space.
The content of the invention
The invention provides a kind of preparation method of the material for ventilated membrane,
Raw material is added directly into continuous internal mixer after banburying, then pelletizing is extruded by double screw extruder, is used
In the material of ventilated membrane,
Wherein, raw material includes metallocene plastic grain, inorganic particulate, polyolefin, EVA elastomers, auxiliary agent,
Auxiliary agent includes lubricant, antioxidant, PPA,
Specifically, metallocene plastic grain is 25~30 parts by weight, inorganic particulate is 60~65 parts by weight, the weight of polyolefin 5
Part, the parts by weight of EVA elastomers 5~10 are measured, lubricant quantity is the 1%~3% of inorganic particulate weight, and antioxidant dosage is raw material
0.5%~1%, the PPA dosages of gross weight are the 0.2%~0.4% of raw material gross weight,
Wherein, metallocene plastic grain is metallocene 3518CB, metallocene 3527PA, for improving material mechanical performance,
Inorganic particulate is the calcium carbonate powder through perstearic acid pre-treatment and activation, and the calcium carbonate average grain diameter is washed in a pan at 1.1 μm
Calcium carbonate of the existing particle diameter at 2.1 μm has been eliminated, and addition also breaches in conventional formulation 50% or so the upper limit,
During pre-treatment and activation, it is 0.6g per the stearic acid used in 100g calcium carbonate, pre-processes the parent for improving calcium carbonate
Oily hydrophobicity,
Polyolefin is 8 carbon LLDPE, is mainly used in improving the strength of materials, and EVA elastomers are then mainly used for improving material
Resilience and toughness,
Lubricant is zinc stearate, stearic acid, Tissuemat E etc.,
Antioxidant uses DLTP,
PPA use reduces material and bonds residual in head, also can further promote the scattered of calcium carbonate, as excellent
Choosing, in this patent using perfluor PPA can heatproof reach 330 DEG C,
This patent can will fill full with substance in preparation process in banbury cavity,
One end is persistently fed continuous internal mixer at work, and the other end persistently discharges, and is a kind of totally enclosed mixed
Device is refined, material is in the enclosed environment all the time during being processed, and this point differs markedly from other kinds of banburying
Equipment, the continuous internal mixer used in this patent is chaos-type birotor continuous internal mixer,
Preferably, being tightly connected between banbury and double screw extruder by melt pipe, raw material is after banburying
Flow through the melt pipe and enter double screw extruder, can so keep the temperature and mobility of material as far as possible；
Meanwhile this patent, by being adjusted to double screw extruder internal threading arrangement, having discarded conventional twin-screw makes
Shearing-type screwing element (such as model 30 °/5/72), only use the conveying function type screwing element of bifilar helix shape
(such as 64/64), make it that there is transfer function, without shear ability, to reduce the Strong shear of dual-screw-stem machine to resin
The destruction of strand and affect the mechanical properties, therefore in this patent be completed in the banburying stage plasticizing and resin with it is inorganic
It is scattered between particle, and the stage is transmitted in twin-screw, the exhaust area using double-screw extruder screw section will press from both sides in ventilative material
Miscellaneous air is discharged as far as possible, influence when avoiding air to ventilative material film forming；
On film-forming apparatus, stretched with the diaphragm that the ventilative material particle obtained by above-mentioned preparation method is extruded in twice of stretching
Uniformly, metallocene plastic grain has ductility, and calcium carbonate does not possess ductility, thus diaphragm be stretched deformation when, carbon
Very tiny cavity is produced around sour calcium particle, these holes are uniform and fine and closely woven, so as to reach the purpose of permeable watertight；Together
When, this patent is extruded ventilative material particle using single screw extrusion machine during due to film forming, shear action of the extruder to ventilative material
Very little, hardly saboteur's chain.
This patent prepares ventilative material using continuous internal mixer in a creative way, and its difficulty is：Using this equipment system
Standby ventilative material occurs substantial amounts of arteriopathy stomata on the ventilated membrane that posterior drawing goes out, and the normal required hole of ventilated membrane is non-
Often tiny, only vapor can be by the way that hydrone can not pass through；And " arteriopathy stomata " hole is larger, aperture reaches 0.5mm
More than, can not stop water by the way that serious can even reach several centimeters.
On the other hand, according to conventional art experience, those skilled in the art be considered in raw material moisture it is higher and caused by (as
The clear stipulaties of moisture are related in examination criteria in the industry on ventilated membrane materials, but not on ventilative
Any restriction of air content in material), but by each raw material carry out transition drying after, on stretched ventilated membrane cavitations according to
It is so serious.And the applicant of this patent is first, it is realized that based on the requirement to ventilative material performance, calcium carbonate powder in expecting of breathing freely accounts for
According to a big chunk proportion, and calcium carbonate powder is light, loose, wherein substantial amounts of air is wrapped in, it is close in the continous way of sealing
Mill plastified, it is scattered during air can not discharge, a part of volume that can not ignore is occupied in ventilative material, from
And just cause occur substantial amounts of arteriopathy stomata on the ventilated membrane that posterior drawing goes out.This is also that other equipment prepares poromeric material
When the problem of less occurring.
Therefore just specially it is connected in this patent using double screw extruder with continuous internal mixer, utilizes twin-screw extrusion
Exhaust area on machine enables ventilative material to discharge air in the transmission stage, has prepared qualified ventilated membrane product.If using single
Screw extruder is connected with the continuous internal mixer in this patent carry out ventilative material transmission if, due in single screw extrusion machine
An only screw rod, therefore perforate or design exhaust area can not be carried out in the spiro rod section of extruder, otherwise in the mistake of extrusion transmission
In journey material can by screw rod motive force and from steam vent splash come out, so single screw extrusion machine does not reach phase naturally also
The exhaust effect answered；And due to being two screw rod cooperations in double screw extruder, its mutual active force can be very
Material is squeezed in two screw rods gap location well, is not in expulsion events；
Secondly, continuous internal mixer is whole at present plastifies this technique, is substantially for preparing masterbatch, masterbatch is made
All it is incorporated into a large amount of pure resins and is molded again afterwards, therefore proportion of the inorganic filler in shaping just substantially reduces,
The problem of there's almost no " air carried secretly in inorganic filler can cause occur stomata on section bar "；And ventilated membrane materials are then complete
Come from the ventilative material particle of high carbon acid calcium powder content.It can be seen that the whole plasticizing of continuous internal mixer, scattered work in this patent
Skill has different meanings.
Embodiment
Embodiment 1
The carbonic acid for being 1.1 μm according to the parts by weight of metallocene 3518CB 25, through perstearic acid pre-treatment and activation and average grain diameter
Calcium powder body (being 0.6g per the stearic acid used in 100g calcium carbonate powders) 65 parts by weight, the parts by weight of 8 carbon LLDPE 5, EVA elastomers
5 parts by weight, lubricant stearic acid zinc (dosage is the 1.5% of Paris white body weight), (dosage is raw material gross weight to anti-oxidant DLTP
Amount 0.5%), perfluor PPA the 0.4% of raw material gross weight (dosage be) ratio, be directly fed simultaneously into continuous internal mixer
Remain in banbury cavity it is filling full with substance, set the area's temperature water flowing of continuous internal mixer charging aperture one and be cooled to
28 DEG C, 185 DEG C of two area's temperature, 220 DEG C of three area's temperature, closed-smelting machine rotor rotating speed be 500 revs/min, material arrives into charging aperture
Discharging time is 130 seconds；
After banburying, material by using only bifilar helix shape screwing element (64/64) double screw extruder extrude pelletizing,
The material for ventilated membrane is obtained, sets the draw ratio of the twin-screw as 1:26,120 DEG C of area's temperature, two 145 DEG C of area's temperature,
Three 165 DEG C of area's temperature, 170 DEG C of exhaust area temperature, four 175 DEG C of area's temperature, 185 DEG C of net-changing device temperature, 210 DEG C of head temperature, pressure
Power table shows that numerical value is 3.5Mpa.
The material for ventilated membrane prepared in the present embodiment is extruded into diaphragm by single screw extrusion machine, and stretched uniform
Ventilated membrane is obtained, wherein, single screw extrusion machine design temperature is：It is no more than 250 by 120 DEG C of starting maximum temperature settings of feed end
DEG C, head is 220 DEG C, and linear velocity is 100 ms/min；Draw ratio is 2 times.
After testing, the ventilated membrane weight prepared by the present embodiment is 16 grams/m, water pressure resistance performance 1730mmH2O, thoroughly
Tolerance is 3220g/m2*24hrs。
Embodiment 2
The carbonic acid for being 1.1 μm according to metallocene 3527PA30 parts by weight, through perstearic acid pre-treatment and activation and average grain diameter
Calcium powder body (being 0.6g per the stearic acid used in 100g calcium carbonate powders) 60 parts by weight, the parts by weight of 8 carbon LLDPE 5, EVA elastomers
10 parts by weight, lubricant stearic acid zinc (dosage is the 1% of Paris white body weight), (dosage is raw material gross weight to anti-oxidant DLTP
Amount 1%), perfluor PPA the 0.2% of raw material gross weight (dosage be) ratio, be directly fed and begin into continuous internal mixer
Keep in banbury cavity being filling full with substance eventually, set the area's temperature water flowing of continuous internal mixer charging aperture one and be cooled to 28
DEG C, 185 DEG C of two area's temperature, 220 DEG C of three area's temperature, closed-smelting machine rotor rotating speed be 500 revs/min, material enters charging aperture to going out
It is 130 seconds to expect the time；
After banburying, material by using only bifilar helix shape screwing element (64/64) double screw extruder extrude pelletizing,
The material for ventilated membrane is obtained, sets the draw ratio of the twin-screw as 1:26,120 DEG C of area's temperature, two 145 DEG C of area's temperature,
Three 165 DEG C of area's temperature, 170 DEG C of exhaust area temperature, four 175 DEG C of area's temperature, 185 DEG C of net-changing device temperature, 210 DEG C of head temperature, pressure
Power table shows that numerical value is 4Mpa.
The material for ventilated membrane prepared in the present embodiment is extruded into diaphragm by single screw extrusion machine, and stretched uniform
Ventilated membrane is obtained, wherein, single screw extrusion machine design temperature is：It is no more than 250 by 120 DEG C of starting maximum temperature settings of feed end
DEG C, head is 220 DEG C, and linear velocity is 100 ms/min；Draw ratio is 2.5 times.
After testing, the ventilated membrane weight prepared by the present embodiment is 16.4 grams/m, water pressure resistance performance 1860mmH2O,
Air permenbility is 2970g/m2*24hrs。
Comparative example 1
In order to be closer to embodiment 1 in technique, this comparative example after banburying during twin-screw extrusion,
The exhaust area of spiro rod section on double screw extruder is closed, the effect being externally vented can not be played and (be similar to and squeezed using single screw rod
Go out machine), remaining operation is the same as embodiment 1.
As a result occur obvious needle-like holes on prepared film, holes a width of 0.5~1mm, a length of 10~25mm, holes
Distribution situation is 5~7/square metre, it is seen that the product can not necessarily stop water by not possessing as ventilated membrane
Condition.
Claims (10)
- A kind of 1. preparation method of material for ventilated membrane, it is characterised in that：Described preparation method is directly to add raw material Enter into continuous internal mixer after banburying, then pelletizing is extruded by double screw extruder, obtain the material for ventilated membrane.
- 2. it is used for the preparation method of the material of ventilated membrane as claimed in claim 1, it is characterised in that：Described raw material includes cyclopentadienyl Metallo-plastic particle, inorganic particulate, polyolefin, EVA elastomers, auxiliary agent.
- 3. it is used for the preparation method of the material of ventilated membrane as claimed in claim 2, it is characterised in that：Described auxiliary agent is lubrication Agent, antioxidant, PPA.
- 4. it is used for the preparation method of the material of ventilated membrane as claimed in claim 2, it is characterised in that：The inorganic particulate accounts for institute State the 60%~65% of raw material gross weight.
- 5. it is used for the preparation method of the material of ventilated membrane as claimed in claim 2, it is characterised in that：The inorganic particulate is warp The calcium carbonate powder of pre-treatment and activation is crossed, the average grain diameter of the calcium carbonate powder is at 1.1 μm.
- 6. it is used for the preparation method of the material of ventilated membrane as claimed in claim 2, it is characterised in that：Described metallocene plastics Particle is metallocene 3518CB or metallocene 3527PA.
- 7. it is used for the preparation method of the material of ventilated membrane as claimed in claim 2, it is characterised in that：Described polyolefin is 8 Carbon LLDPE.
- 8. it is used for the preparation method of the material of ventilated membrane as claimed in claim 3, it is characterised in that：Described lubricant is hard Resin acid zinc, stearic acid or Tissuemat E.
- 9. it is used for the preparation method of the material of ventilated membrane as claimed in claim 1, it is characterised in that：The banbury with it is described It is tightly connected between double screw extruder by melt pipe, raw material flows through the melt pipe after banburying and enters twin-screw Extruder.
- A kind of 10. application of the material prepared such as any one of claim 1 to 9 methods described, it is characterised in that：For preparing Air film.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201711040765.8A CN107674295A (en) | 2017-10-31 | 2017-10-31 | A kind of preparation method of material for ventilated membrane |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201711040765.8A CN107674295A (en) | 2017-10-31 | 2017-10-31 | A kind of preparation method of material for ventilated membrane |
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| CN107674295A true CN107674295A (en) | 2018-02-09 |
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| CN201711040765.8A Pending CN107674295A (en) | 2017-10-31 | 2017-10-31 | A kind of preparation method of material for ventilated membrane |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109912878A (en) * | 2019-03-12 | 2019-06-21 | 雷诺丽特塑料科技（北京）有限公司 | It is used to prepare the feedstock composition, blown film ventilated membrane and its preparation of blown film ventilated membrane |
| CN112443973A (en) * | 2019-08-29 | 2021-03-05 | 青岛经济技术开发区海尔热水器有限公司 | Exhaust device and water heater |
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| JPH03285930A (en) * | 1990-04-02 | 1991-12-17 | Nippon Unicar Co Ltd | Air-permeable film, production thereof and resin composition for air-permeable film |
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-
2017
- 2017-10-31 CN CN201711040765.8A patent/CN107674295A/en active Pending
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| CN1651500A (en) * | 2005-01-20 | 2005-08-10 | 福建师范大学 | Preparation method of special resin for making high filling high permeable unidirection stretching film |
| 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 |
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Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109912878A (en) * | 2019-03-12 | 2019-06-21 | 雷诺丽特塑料科技（北京）有限公司 | It is used to prepare the feedstock composition, blown film ventilated membrane and its preparation of blown film ventilated membrane |
| CN109912878B (en) * | 2019-03-12 | 2021-12-07 | 雷诺丽特塑料科技（北京）有限公司 | Raw material composition for preparing film-blowing breathable film, film-blowing breathable film and preparation of film-blowing breathable film |
| CN112443973A (en) * | 2019-08-29 | 2021-03-05 | 青岛经济技术开发区海尔热水器有限公司 | Exhaust device and water heater |
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Application publication date: 20180209 |