CN105926079B - Polypropylene film-fibre and preparation method and air filting material prepared therefrom - Google Patents
Polypropylene film-fibre and preparation method and air filting material prepared therefrom Download PDFInfo
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- CN105926079B CN105926079B CN201610466043.8A CN201610466043A CN105926079B CN 105926079 B CN105926079 B CN 105926079B CN 201610466043 A CN201610466043 A CN 201610466043A CN 105926079 B CN105926079 B CN 105926079B
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- D—TEXTILES; PAPER
- D01—NATURAL OR MAN-MADE THREADS OR FIBRES; SPINNING
- D01F—CHEMICAL FEATURES IN THE MANUFACTURE OF ARTIFICIAL FILAMENTS, THREADS, FIBRES, BRISTLES OR RIBBONS; APPARATUS SPECIALLY ADAPTED FOR THE MANUFACTURE OF CARBON FILAMENTS
- D01F8/00—Conjugated, i.e. bi- or multicomponent, artificial filaments or the like; Manufacture thereof
- D01F8/04—Conjugated, i.e. bi- or multicomponent, artificial filaments or the like; Manufacture thereof from synthetic polymers
- D01F8/06—Conjugated, i.e. bi- or multicomponent, artificial filaments or the like; Manufacture thereof from synthetic polymers with at least one polyolefin as constituent
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- D—TEXTILES; PAPER
- D01—NATURAL OR MAN-MADE THREADS OR FIBRES; SPINNING
- D01D—MECHANICAL METHODS OR APPARATUS IN THE MANUFACTURE OF ARTIFICIAL FILAMENTS, THREADS, FIBRES, BRISTLES OR RIBBONS
- D01D1/00—Treatment of filament-forming or like material
- D01D1/04—Melting filament-forming substances
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- D—TEXTILES; PAPER
- D01—NATURAL OR MAN-MADE THREADS OR FIBRES; SPINNING
- D01D—MECHANICAL METHODS OR APPARATUS IN THE MANUFACTURE OF ARTIFICIAL FILAMENTS, THREADS, FIBRES, BRISTLES OR RIBBONS
- D01D5/00—Formation of filaments, threads, or the like
- D01D5/42—Formation of filaments, threads, or the like by cutting films into narrow ribbons or filaments or by fibrillation of films or filaments
- D01D5/426—Formation of filaments, threads, or the like by cutting films into narrow ribbons or filaments or by fibrillation of films or filaments by cutting films
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- D—TEXTILES; PAPER
- D01—NATURAL OR MAN-MADE THREADS OR FIBRES; SPINNING
- D01F—CHEMICAL FEATURES IN THE MANUFACTURE OF ARTIFICIAL FILAMENTS, THREADS, FIBRES, BRISTLES OR RIBBONS; APPARATUS SPECIALLY ADAPTED FOR THE MANUFACTURE OF CARBON FILAMENTS
- D01F1/00—General methods for the manufacture of artificial filaments or the like
- D01F1/02—Addition of substances to the spinning solution or to the melt
- D01F1/10—Other agents for modifying properties
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Abstract
The invention discloses a kind of polypropylene film-fibre and preparation method thereof, described polypropylene film-fibre is mainly prepared by raw materials such as PP particulate materials, POE particulate materials, bulking agent, modified nano powder, antioxidant and light stabilizers.The present invention first uses dissaving polymer surface graft modification nano-powder, film master batch and modified film material are sequentially prepared again, then double-deck or three-layer thin-film material is made by co-extrusion to laminated film, and the more roller stretchings of process, infrared baking oven heat, mechanical membrane splits, and polypropylene film-fibre is made in the techniques such as fine and thermal finalization, prepared film-fibre original fiber degree, fracture strength and initial modulus are higher, have the fluff structure of large aperture multichannel.The polypropylene film-fibre of the present invention makes air filting material as matrix material, can reach the effect of efficient low-resistance.
Description
Technical field
The present invention relates to thermoplastic polyolefin fibers field, and in particular to a kind of high intensity, original fiber degree are high and can enter
Thermoplastic polypropylene film-fibre of row electrostatic electret processing and preparation method thereof.
Background technology
The manufacturing process of fibrous nonwoven material, which is divided into, prepares fiber, networking, bonding, thermal finalization, final finishing and packaging etc. 6
Individual process, production technology include dry method, wet method, spinning network method, needle point method, loop bonding method, spun-bond process, meltblown, film and split method and electrostatic
Spin processes etc..Wherein, the non-woven material that dry process is produced is also easy to produce static charge buildup, not alkaline-resisting；Wet processing water consumption
Amount is big, and kind transition probabilities is small；Spinning the non-woven material that network method technique is produced can not be degraded, and easily environment is polluted；
Its defect of the non-woven material that needle point method technique is produced is to lack toughness, product easy fracture；The defects of stitching knitting craft is original
High material consumption, production cost are high；The product elongation of spun-bond process production is big, tensile strength is low, size is unstable, yielding；
Method of electrostatic spinning, either solution Static Spinning or melt Static Spinning production efficiency all be present and yield is relatively low, process conditions are difficult
The problems such as to control；Fibre web accumulation prepared by meltblown is closely knit, although higher as filtering material filter efficiency, gas-flow resistance
It is larger.
It is a kind of new technology, the new technology for processing synthetic fibers that film, which splits method to prepare fiber, and it is to be drawn using film through high power
After stretching, molecularly oriented balanced arrangement, axial strength raises, and the strength of broadwise is down to the limit, can voluntarily cleaved into fiber
In characteristic, film is made in the melting extrusion multiple tracks longitudinal direction hot-stretch of polymer elder generation, the processing of then machined or chemical method
A kind of obtained method of fiber.This new technology have it is less demanding to raw material, density is light, tensile strength is high, production technology
Short flow, equipment investment are less, product specification in adjustable to a certain degree, low cost and other advantages, be widely used in work
Industry field, such as manufacture carpet (face blanket and base fabric), rope, fishing net, thick sewing thread, bonded fabric, packaging bagging, furniture stuff, people
Make lawn, dam, reinforcing material for building and Water filter material and air filting material etc..
Flat is presented in the fiber that film splits method preparation, and draw ratio is typically larger than 5:1, normal distribution is presented in fibre diameter, both
Containing the high superfine fibre of a large amount of original fiber degrees, there is also " large-size fiber " of a small amount of certain diameter distribution.When applied to
In air filting material, the superfine fibre of its high original fiber degree can be used as bulk filter fiber, and superfine fibre specific surface area is big,
Adsorption capacity is strong, and thicker fiber makes fibre web have certain thickness, form large aperture and Duo Tong as skeletal support fibre web
Road, structure is fluffy, so as to reduce the characteristic of filtration resistance while ensure that compared with filtration efficiency and dust containing capacity, if entering one
Step carries out the electret processing that polarizes to air filting material, can further improve its filtering material, have very extensive reality
Border application value.
Because polypropylene material is high crystalline material, the film toughness with its preparation is poor, and elongation at break is low, and stretching is disconnected
It is notable to split phenomenon, easily produces lousiness, fracture of wire in fibrillation, in addition can not continuous fibrillation, it is difficult to prepare relatively thin film and
Superfine fibre, it is therefore desirable to toughening modifying is carried out to it, and promotes its fibrillation.Conventional toughening modifying method such as adds inorganic
Powder, polyethylene or other polymers elastomer, these toughening modifying methods are difficult to improve fibre strength, toughness and processing
While process conditions, the original fiber degree of polypropylene fibre is improved, prepared film-fibre fibre net structure is closely knit, as sky
Gas filtering material, gas-flow resistance is big, is unable to reach the effect of efficient low-resistance.The film-fibre that conventional film splits the preparation of method technique is present
The uniformity and less stable of fiber product fineness, original fiber degree is relatively low, while fibrillation process is easily fluffed, is broken and twined
The defects of around roller.Therefore, it is necessary to the polypropylene film-fibre that a kind of mechanical property is good and original fiber degree is high be developed, as filtering
Material, on the premise of high efficiency absorption is ensured, filtration resistance is preferably minimized.
The content of the invention
The problem of existing for existing polypropylene film-fibre and its electret nonwoven air filting material, the present invention carries
High for a kind of original fiber degree, intensity is higher, and the polypropylene film-fibre of the fluff structure with large aperture multichannel and its
Preparation method, and use it for preparing air filting material, reach the effect of efficient low-resistance.
The technical solution adopted by the present invention is as follows：
A kind of preparation method of polypropylene film-fibre, comprises the following steps：
(1) dissaving polymer surface graft modification nano-powder；
(2) preparation of film master batch：
A layer film master batches：100 parts of PP particulate materials, 25~75 parts of POE particles, 0.5~3.5 part of bulking agent, modified Nano powder
10~25 parts of body, 0.5~1.5 part of antioxidant, 0.15~0.5 part of light stabilizer, above-mentioned each composition low speed in high mixer is filled
Point mixing, then through double screw extruder fusion plastification, extrusion, water cooling, air-dry, pelletizing, be dried to obtain A layer film master batches；
B layer film master batches：100 parts of POE particulate materials, 10~20 parts of modified nano powder, 0.2~1.0 part of antioxidant, light are steady
Determine 0.05~0.5 part of agent, above-mentioned each composition low speed in high mixer is sufficiently mixed, then melt and mould through double screw extruder
Change, extrusion, water cooling, air-dry, pelletizing, be dried to obtain B layer film master batches；
(3) preparation of modified film material：
A layer modified film material：20 parts of 100 parts of PP particulate materials and A layer films master batch are well mixed in high mixer high speed,
It is standby；
B layer modified film material：20 parts of 100 parts of POE particulate materials and B layer films master batch are mixed in high mixer high speed
It is even, it is standby；
(4) preparation of film-fibre：
First by A layer modified film material and B layer modified films the material fusion plastification in single screw extrusion machine respectively, Ran Houyi
It is secondary by measuring pump, filter and melt distributor by two kinds of modified film material by certain mass ratio co-extrusion for laminated film,
Again successively through supercooling, cut into bar, first time multiple roll hot-stretch, infrared baking oven heating, second multiple roll hot-stretch, mechanical membrane
Polypropylene film-fibre is made in fine, thermal finalization of splitting.
Dissaving polymer includes Hyperbranched Polyester Resin, ultrabranching polyamide resin, hyperbranched poly in the step (1)
Ether or super branched polyurethane resin；It is preferred that Hyperbranched Polyester Resin.
Nano-powder is included in nano titanium oxide, nano silicon and nano-tourmaline powder in the step (1)
It is at least one；It is preferred that nano silicon, particle diameter is 20~30nm, and specific surface area is 220~400m2/g。
PP particulate materials are that melt index is 0.5~7.0g/10min in the step (2), and isotacticity is more than PP of 95%
Pellet；Preferred molten index is 3.0~5.0g/10min, and isotacticity is 96~98% PP particulate materials.
POE particulate materials include ethene and butylene copolymer or ethene and octene copolymer, ethylene contents in the step (2)
For 10~30%, melt index is 0.5~8.0g/10min；Optimal ethylene and octene copolymer, ethylene contents are 10~20%,
Melt index is 4.0~6.0g/10min.
Bulking agent includes PP-g-GMA, PP-g-GMA/St, PP-g-MAH, POE-g-MAH, POE-g- in the step (2)
PMAH or POE-g-GMA；It is preferred that PP-g-GMA/St and PP-g-MAH.
Antioxidant includes Hinered phenols antioxidant, phosphite ester kind antioxidant or thio kind antioxidant in the step (2)
At least one of；It is preferred that Hinered phenols antioxidant and phosphite ester kind antioxidant or thio kind antioxidant compounding use.
Light stabilizer includes hindered amine light stabilizer, benzophenone light stabilizer or benzo three in the step (2)
At least one of azole light stabilizer.
The mass ratio of A layer modified film material and B layer modified film material is 70 in the step (4):30~90:10；It is preferred that
80:20~85:15.
Laminated film can be AB double membrane structures or BAB trilamellar membrane structures in the step (4)；It is preferred that BAB trilamellar membrane knots
Structure.
Laminated film thickness is 15~300 μm in the step (4).
Multiple roll hot-stretch temperature is 100~125 DEG C in the step (4), and the linear velocity of first roller is 5~50m/
Min, draw ratio are 1.5~8；It is preferred that first time draw ratio is 4~6, second of draw ratio is 1.5~3.
It using the pin density of porcupine roller is 30~120 pins/cm that mechanical membrane, which splits fine, in the step (4), and porcupine roller linear velocity is
10~20 times of first roller linear velocity；It is preferred that 60~80 pins of pin density/cm.
In the step (4) mechanical membrane split fine all pins using porcupine roller and film traffic direction angle be 50~
85°；It is preferred that 60~70 °.
Heat setting temperature is 90~125 DEG C in the step (4)；It is preferred that 105~115 DEG C.
The present invention also provides the polypropylene film-fibre prepared by the above method or prepared including the polypropylene film-fibre
Electret air filtering material.
Bulking agent PP-g-GMA represents glycidyl methacrylate graft polypropylene, PP-g-GMA/St in the present invention
GMA/styrene multi-monomer grafting polypropylene is represented, PP-g-MAH represents maleic anhydride grafting poly- third
Alkene, POE-g-MAH represent that maleic anhydride stem grafting polyolefin elastomer, POE-g-PMAH represent HPMA graft polyolefin bullet
Property body, POE-g-GMA represent glycidyl methacrylate graft polyolefin elastomer.
Beneficial effects of the present invention：
Modified nano powder and POE particulate materials are with the addition of in the preparation process of polypropylene film-fibre of the present invention, through over-expense
The nano-powder that fluidized polymer is modified not only has preferably dispersiveness and compatibility in polypropylene base, moreover it is possible in certain journey
Increase-volume PP and POE on degree, so as to improve the fracture strength of polypropylene fibre, elongation at break and initial modulus；In POE particles
Crystalline ethene segment and polypropylene have good compatibility, are easy to get in PP matrixes to less Dispersed Phase Size and narrower
Particle diameter distribution, further increase the intensity and elongation at break of fiber, and promote fiber fibrillation.In addition, making
During standby laminated film, the POE base materials of B layer film material soften in the multiple roll hot-stretch stage, after film splits fibre more
Easily there is fibrillation phenomenon.Film-fibre fracture strength height, elongation at break and original fiber degree prepared by the present invention is big,
It is thicker also containing diameter big fiber distributed more widely not only containing the very high superfine fibre of original fiber degree in film-fibre
Fiber can be used as fibrous skeleton support fibre web, ensure that fibre web has certain thickness and intensity, formed large aperture, multichannel it is fluffy
Loose structure, when preparing air filting material with it, gas permeability is not reduced while filter efficiency is improved, it is efficient so as to reach
The effect of low-resistance.
Brief description of the drawings
Fig. 1 is the SEM figures of embodiment 5
Fig. 2 is the SEM figures of regular air filtering material
Specific embodiment
Embodiment 1
The present embodiment polypropylene film-fibre is prepared according to the following steps：
(1) super branched polyurethane surface modification of resin nano silica powder is used, obtains modified manometer silicon dioxide；
(2) preparation of film master batch：
A layer film master batches：100 parts of PP particulate materials, 25 parts of POE particles, 0.5 part of bulking agent PP-g-MAH, modified Nano two
10 parts of silica, 0.4 part of antioxidant 1010,0.1 part of irgasfos 168,0.15 part of light stabilizer GW-540, by it is above-mentioned respectively into
Part low speed in high mixer is sufficiently mixed, then through double screw extruder fusion plastification, extrusion, water cooling, air-dried, pelletizing, drying
Obtain A layer film master batches；
B layer film master batches：100 parts of POE particulate materials, 10 parts of modified manometer silicon dioxide, anti-oxidant Irganox 1,010 0.2
Part, 0.05 part of light stabilizer GW-540, above-mentioned each composition low speed in high mixer are sufficiently mixed, then through twin-screw extrusion
Machine fusion plastification, extrusion, water cooling, air-dry, pelletizing, be dried to obtain B layer film master batches；
(3) preparation of modified film material：
A layer modified film material：20 parts of 100 parts of PP particulate materials and A layer films master batch are well mixed in high mixer high speed,
It is standby；
B layer modified film material：20 parts of 100 parts of POE particulate materials and B layer films master batch are mixed in high mixer high speed
It is even, it is standby；
(4) preparation of film-fibre：
A) first by A layer modified film material and B layer modified films the material fusion plastification in single screw extrusion machine respectively, then
Measuring pump, filter and melt distributor are passed sequentially through by two kinds of modified film material in mass ratio 70:30 prepare through coextrusion casting
Be 300 μm of AB double-layer compound films into thickness, then successively through supercooling, cut into bar；
B) it is 100 DEG C of roller hot-stretch in temperature by the film of above-mentioned slitting, the linear velocity of first roller is 5m/min,
Draw ratio is 8 times, then is heated through infrared baking oven, and second of multiple roll hot-stretch, stretching times are carried out at being then 100 DEG C in temperature
Number is 2 times；
C) it is 30 pins/cm through pin density by the film after above-mentioned stretching, linear velocity is first 20 times of roller linear velocity
Porcupine roller carries out mechanical membrane and split fibre, and the angle of pin and film traffic direction is 50 °, and then polypropylene is made in thermal finalization at 90 DEG C
Film-fibre.
Embodiment 2
(1) hyperbranched polyether surface modification of resin nano titanium oxide and nano-tourmaline powder are used, obtains modified Nano
Titanium dioxide and nano-tourmaline；
(2) preparation of film master batch：
A layer film master batches：100 parts of PP particulate materials, 45 parts of POE particles, 1.5 parts of bulking agent POE-g-MAH, modified Nano
10 parts of titanium dioxide, 10 parts of modified Nano tourmaline powder, 0.8 part of antioxidant 1076,1,035 0.2 parts of antioxidant, light stabilizer
770 0.3 parts, above-mentioned each composition low speed in high mixer is sufficiently mixed, then through double screw extruder fusion plastification, extrusion,
Water cooling, air-dried, pelletizing, it is dried to obtain A layer film master batches；
B layer film master batches：100 parts of POE particulate materials, 10 parts of modified nano-titanium dioxide, 0.4 part of antioxidant 1076, light are steady
Determine 770 0.4 parts of agent, above-mentioned each composition low speed in high mixer be sufficiently mixed, then through double screw extruder fusion plastification,
Extrusion, water cooling, air-dry, pelletizing, be dried to obtain B layer film master batches；
(3) preparation of modified film material：
A layer modified film material：20 parts of 100 parts of PP particulate materials and A layer films master batch are well mixed in high mixer high speed,
It is standby；
B layer modified film material：20 parts of 100 parts of POE particulate materials and B layer films master batch are mixed in high mixer high speed
It is even, it is standby；
(4) preparation of film-fibre：
A) first by A layer modified film material and B layer modified films the material fusion plastification in single screw extrusion machine respectively, then
Measuring pump, filter and melt distributor are passed sequentially through by two kinds of modified film material in mass ratio 90:10 are prepared into thickness through co-extrusion
Spend the AB double-layer compound films for 150 μm, then successively through supercooling, cut into bar；
B) by the multiple roll hot-stretch in the case where temperature is 110 DEG C of the film of above-mentioned slitting, the linear velocity of first roller is 35m/
Min, draw ratio is 6 times, then is heated through infrared baking oven, carries out second of multiple roll hot-stretch at being then 100 DEG C in temperature, draws
Multiple is stretched for 1.5 times；
C) it is 120 pins/cm through pin density by the film after above-mentioned stretching, linear velocity is first 10 times of roller linear velocity
Porcupine roller carries out mechanical membrane and split fibre, and the angle of pin and film traffic direction is 85 °, and then thermal finalization is made poly- third at 100 DEG C
Alkene film-fibre.
Embodiment 3
(1) ultrabranching polyamide surface modification of resin nano titanium oxide and nano silicon are used, obtains modified Nano
Titanium dioxide and nano silicon；
(2) preparation of film master batch：
A layer film master batches：100 parts of PP particulate materials, 75 parts of POE particles, 3.5 parts of bulking agent PP-g-GMA, modified Nano two
5 parts of titanium oxide, 10 parts of modified manometer silicon dioxide, 1.2 parts of antioxidant 2246,626 0.3 parts of antioxidant, light stabilizer 944
0.5 part, above-mentioned each composition low speed in high mixer is sufficiently mixed, then through double screw extruder fusion plastification, extrusion, water
Cold, air-dried, pelletizing, it is dried to obtain A layer film master batches；
B layer film master batches：100 parts of POE particulate materials, 5 parts of modified nano-titanium dioxide, 10 parts of modified manometer silicon dioxide,
0.8 part of antioxidant 2246,626 0.2 parts of antioxidant, 0.05 part of light stabilizer UV-360, by above-mentioned each composition in high mixer
Low speed is sufficiently mixed, then through double screw extruder fusion plastification, extrusion, water cooling, air-dry, pelletizing, be dried to obtain B layer films mother
Grain；
(3) preparation of modified film material：
A layer modified film material：20 parts of 100 parts of PP particulate materials and A layer films master batch are well mixed in high mixer high speed,
It is standby；
B layer modified film material：20 parts of 100 parts of POE particulate materials and B layer films master batch are mixed in high mixer high speed
It is even, it is standby；
(4) preparation of film-fibre：
A) first by A layer modified film material and B layer modified films the material fusion plastification in single screw extrusion machine respectively, then
Measuring pump, filter and melt distributor are passed sequentially through by two kinds of modified film material in mass ratio 85:15 prepare through coextrusion casting
Be 30 μm tri- layers of laminated films of BAB into thickness, then successively through supercooling, cut into bar；
B) by the multiple roll hot-stretch in the case where temperature is 120 DEG C of the film of above-mentioned slitting, the linear velocity of first roller is 50m/
Min, draw ratio is 4 times, then is heated through infrared baking oven, carries out second of multiple roll hot-stretch at being then 120 DEG C in temperature, draws
Multiple is stretched for 3 times；
C) it is 60 pins/cm through pin density by the film after above-mentioned stretching, linear velocity is first 16 times of roller linear velocity
Porcupine roller carries out mechanical membrane and split fibre, and the angle of pin and film traffic direction is 65 °, and then thermal finalization is made poly- third at 125 DEG C
Alkene film-fibre.
Embodiment 4
(1) Hyperbranched Polyester Resin surface modified nano silicon and nano-tourmaline powder are used, obtains modified Nano
Tourmaline powder and nano-tourmaline powder；
(2) preparation of film master batch：
A layer film master batches：100 parts of PP particulate materials, 50 parts of POE particles, 2.0 parts of bulking agent POE-g-GMA, modified Nano
0 part of silica 1,8 parts of modified Nano tourmaline powder, 0.7 part of antioxidant 300,0.2 part of antioxidant 300, antioxidant 641
0.1 part, 622 0.4 parts of light stabilizer, above-mentioned each composition low speed in high mixer is sufficiently mixed, then through double screw extruder
Fusion plastification, extrusion, water cooling, air-dry, pelletizing, be dried to obtain A layer film master batches；
B layer film master batches：100 parts of POE particulate materials, 15 parts of modified manometer silicon dioxide, modified Nano tourmaline powder 5
Part, 0.7 part of antioxidant 300,641 0.1 parts of antioxidant, 622 0.3 parts of light stabilizer, by above-mentioned each composition in high mixer it is low
Speed is sufficiently mixed, then through double screw extruder fusion plastification, extrusion, water cooling, air-dry, pelletizing, be dried to obtain B layer films mother
Grain；
(3) preparation of modified film material：
A layer modified film material：20 parts of 100 parts of PP particulate materials and A layer films master batch are well mixed in high mixer high speed,
It is standby；
B layer modified film material：20 parts of 100 parts of POE particulate materials and B layer films master batch are mixed in high mixer high speed
It is even, it is standby；
(4) preparation of film-fibre：
A) first by A layer modified film material and B layer modified films the material fusion plastification in single screw extrusion machine respectively, then
Measuring pump, filter and melt distributor are passed sequentially through by two kinds of modified film material in mass ratio 85:15 prepare through coextrusion blow
Be 15 μm of AB double-layer compound films into thickness, then successively through supercooling, cut into bar；
B) by the multiple roll hot-stretch in the case where temperature is 125 DEG C of the film of above-mentioned slitting, the linear velocity of first roller is 10m/
Min, draw ratio is 1.2 times, then is heated through infrared baking oven, and second of multiple roll hot-stretch is carried out at being then 125 DEG C in temperature,
Draw ratio is 8 times；
C) it is 75 pins/cm through pin density by the film after above-mentioned stretching, linear velocity is first 13 times of roller linear velocity
Porcupine roller carries out mechanical membrane and split fibre, and the angle of pin and film traffic direction is 75 °, and then thermal finalization is made poly- third at 110 DEG C
Alkene film-fibre.
Embodiment 5
(1) Hyperbranched Polyester Resin surface modified nano silicon powder is used, obtains modified manometer silicon dioxide powder；
(2) preparation of film master batch：
A layer film master batches：100 parts of PP particulate materials, 60 parts of POE particles, 2.0 parts of bulking agent PP-g-GMA/St, modification are received
5 parts of silica 1 of rice, 1,065 1.0 parts of antioxidant, 0.4 part of light stabilizer UV-5411, by above-mentioned each composition in high mixer
Low speed is sufficiently mixed, then through double screw extruder fusion plastification, extrusion, water cooling, air-dry, pelletizing, be dried to obtain A layer films mother
Grain；
B layer film master batches：100 parts of POE particulate materials, 10 parts of modified manometer silicon dioxide, 1,065 0.8 parts of antioxidant, light are steady
Determine 0.3 part of agent, above-mentioned each composition low speed in high mixer be sufficiently mixed, then through double screw extruder fusion plastification, extrusion,
Water cooling, air-dried, pelletizing, it is dried to obtain B layer film master batches；
(3) preparation of modified film material：
A layer modified film material：20 parts of 100 parts of PP particulate materials and A layer films master batch are well mixed in high mixer high speed,
It is standby；
B layer modified film material：20 parts of 100 parts of POE particulate materials and B layer films master batch are mixed in high mixer high speed
It is even, it is standby；
(4) preparation of film-fibre：
A) first by A layer modified film material and B layer modified films the material fusion plastification in single screw extrusion machine respectively, then
Measuring pump, filter and melt distributor are passed sequentially through by two kinds of modified film material by B layers：A layers：The mass ratio of B layers is 10：
80：10 to be prepared into thickness through coextrusion blow be 20 μm tri- layers of laminated films of BAB, then successively through supercooling, cut into bar；
B) by the multiple roll hot-stretch in the case where temperature is 110 DEG C of the film of above-mentioned slitting, the linear velocity of first roller is 20m/
Min, draw ratio is 5 times, then is heated through infrared baking oven, carries out second of multiple roll hot-stretch at being then 110 DEG C in temperature, draws
Multiple is stretched for 2 times；
C) it is 75 pins/cm through pin density by the film after above-mentioned stretching, linear velocity is first 16 times of roller linear velocity
Porcupine roller carries out mechanical membrane and split fibre, and the angle of pin and film traffic direction is 70 °, and then thermal finalization is made poly- third at 110 DEG C
Alkene film-fibre.
Comparative example 5 '
Nano-tourmaline powder is by hyperbranched modification in this comparative example, other by the step of embodiment 5 and matching somebody with somebody
Side prepares polypropylene film-fibre.
Comparative example 5 "
This comparative example uses PE toughening modifyings instead, the POE in embodiment 5 is all made into without using POE toughening modifyings
PE, it is other by the step of embodiment 5 and formula prepares polypropylene film-fibre.
Embodiment 6
(1) Hyperbranched Polyester Resin surface modified nano silicon powder is used, obtains modified manometer silicon dioxide powder；
(2) preparation of film master batch：100 parts of PP particulate materials, 35 parts of POE particles, 1.0 parts of bulking agent POE-g-PMAH, modification
25 parts of nano silicon, 1,065 0.8 parts of antioxidant, 0.2 part of light stabilizer UV-5411, by above-mentioned each composition in high mixer
Middle low speed is sufficiently mixed, then through double screw extruder fusion plastification, extrusion, water cooling, air-dry, pelletizing, be dried to obtain film mother
Grain；
(3) preparation of modified film material：100 parts of PP particulate materials and above-mentioned 20 parts of film master batch are mixed in high mixer high speed
Close uniformly, it is standby；
(4) preparation of film-fibre：
A) first then above-mentioned modified film material fusion plastification in single screw extrusion machine is passed sequentially through into measuring pump and mistake
Filter, it is 20 μm of film that modified film material extrusion blow is prepared into thickness, then successively through supercooling, cut into bar；
B) by the multiple roll hot-stretch in the case where temperature is 110 DEG C of the film of above-mentioned slitting, the linear velocity of first roller is 40m/
Min, draw ratio is 5 times, then is heated through infrared baking oven, carries out second of multiple roll hot-stretch at being then 110 DEG C in temperature, draws
Multiple is stretched for 2 times；
C) it is 75 pins/cm through pin density by the film after above-mentioned stretching, linear velocity is first 13 times of roller linear velocity
Porcupine roller carries out mechanical membrane and split fibre, and the angle of pin and film traffic direction is 75 °, and then thermal finalization is made poly- third at 110 DEG C
Alkene film-fibre.
Comparative example 6 '
This comparative example preparation method does not wherein add POE, Qi Tapei with embodiment 6 in the preparation formula of film master batch
Side is the same as embodiment 6.
Grafted by super branched polymer modified nano powder method is in the various embodiments described above：Pass through KH-550 or second first
Diamines introduces activity hydroxy or amino on nano-powder, as reaction core, reacted with monomer molecule, monomer molecule it
Between addition reaction can also occur, obtain grafted by super branched polymer modification nano-powder.Its method of modifying refers to Wuhan engineering
Master's thesis bright university Yang Liang《Superfine silicon dioxide surface grafting dissaving polymer is studied》.
By the polypropylene film-fibre prepared in the various embodiments described above by boundling, tension force, seal wire, steam soften,
Crimp, the film that importing disc type or guillotine type fibre cutting machine are cut into designated length after thermal finalization splits chopped fiber, chopped fiber warp pair
Road shredding, combing, lapping, two pass acupuncture, thermal finalization, electret processing and winding are prepared into electret non-woven fabrics (grammes per square metre about 160g/
m2), represented respectively with 1,2,3,4,5,5-A, 5-B, 6 and 6-A, and the electret non-woven fabrics is used in air filting material,
Then the strainability of polypropylene film-fibre properties and corresponding non-woven fabrics, test knot are tested according to following method of testings
The following Tables 1 and 2 of fruit.
The method of testing of polypropylene film-fibre：(1) fracture strength, elongation and initial modulus reference《GB/T19975-
2005 high-strength chemical-fibre filament draw method for testing performances》Standard testing, wherein two chuck gauges are 250mm, extension speed is
250mm/min, pre-tension 5cN；(2) average diameter：Using light microscope automatically scanning method at random measure 1000~
2000 fibre diameters, then calculate average value；(3) fibrillation index is with reference to Yang Xuhong's《Lyocell fiber original fiber degree
Evaluation》In fibrillation index subjective estimate method be measured.
The method of testing of non-woven fabric air filtering material：(1) filter efficiency：According to《GB 2626-2006 respiratory protections are used
Product suction-self filtering type against particle respirator》In Section 6.3 of standard tested；(2) gas-flow resistance：Reference《GB 19083-
2010 medical protective mask technical requirements》In Section 5.4 of standard tested, wherein from 0.3 μm of NaCl particles, gas
Flow is 30L/min, and test environment humiture respectively may be about 23 DEG C and 30%；(3) gas permeability：With reference to 5453-1997《Textile
The test of fabric breathability》Testing air permeable amount, selection of differential pressure 100Pa.
The performance parameter of the polypropylene film-fibre of table 1
The performance parameter of the air filting material of table 2
| Product | Filter efficiency/% | Resistance/Pa | Air permenbility/(L/m2·s) |
| 1 | 87.1 | 25.8 | 2204 |
| 2 | 89.5 | 24.5 | 2210 |
| 3 | 95.1 | 13.9 | 2814 |
| 4 | 92.5 | 19.5 | 2450 |
| 5 | 96.2 | 15.2 | 2620 |
| 5-A | 86.5 | 25.5 | 2122 |
| 5-B | 88.3 | 23.2 | 2318 |
| 6 | 88.1 | 30.1 | 1854 |
| 6-A | 60.5 | 32.9 | 1762 |
Nano-powder is can be seen that without grafted by super branched polymer modification from the data in table 1 and uses PE toughness reinforcings
It is smaller to be modified fracture strength, elongation, initial modulus and the fibrillation index of prepared film-fibre, such as comparative example
5 ', because dispersiveness and compatibility of the nano-powder being modified through dissaving polymer in polypropylene base substantially obtain
Improve, and can also increase-volume PP and POE to a certain extent, improve the fracture strength and elongation of fiber, and modified
Nano-powder afterwards can induce film and fibrous inside β trichites to give birth to melting recrystallization, turn under the drawing process of certain temperature
α crystalline substances are turned to, add the initial modulus of fiber.Fracture strength, elongation, initial modulus and the fibrillation of comparative example 5 " refer to
Number is significantly lower than the performance parameter of the film-fibre of embodiment 5, and average diameter is larger, because crystalline second in POE
Alkene segment has good compatibility with PP, and its apparent shear viscosity is close with PP to the dependence of temperature, has stronger shearing
Sensitiveness, it is easy to get in PP matrixes to less Dispersed Phase Size and narrower particle diameter distribution, improves PP and POE co-mixing systems
Intensity and elongation at break, and prepare ultrathin film, and then the thinner and higher film of original fiber degree can be prepared and split
Fiber, as shown in figure 1, not only containing the very high superfine fibre of original fiber degree in film-fibre, it is also big containing being relatively large in diameter
Fiber.
It is higher to can also be seen that complex thin film structure of the present invention is easier to prepare original fiber degree from the data in table 1
Film-fibre, as, not using the B layer film material that are prepared by POE as base material, prepared film-fibre is singly in embodiment 6
Layer film, its original fiber degree is relatively low, and when not adding POE in its preparation process, such as comparative example 6 ', its fibrillation journey
Degree is lower, because POE can not only Toughened PP, moreover it is possible to promote PP fiber fibrillations, in addition, in the multiple roll hot-stretch stage,
POE components soften, and PP components do not occur melting phenomenon, are easier fibrillation occur after film splits fibre.
The air filting material prepared by the film-fibre of the present invention, its filter efficiency are can be seen that from the data in table 2
It is higher, resistance is relatively low, Air permenbility is larger because film-fibre of the present invention is not only containing the very high ultra-fine fibre of original fiber degree
Dimension, also containing diameter big fiber distributed more widely, thicker fiber can be used as fibrous skeleton support fibre web, ensure that fibre web has one
Fixed thickness and intensity, large aperture, the fluff structure of multichannel are formed, so as to ensure that on the premise of high efficiency filter, filtering
Resistance is relatively low, and gas permeability is larger.
Claims (16)
1. a kind of preparation method of polypropylene film-fibre, comprises the following steps：
(1) dissaving polymer surface graft modification nano-powder is prepared；
(2) preparation of film master batch：
A layer film master batches：100 parts of PP particulate materials, 25~75 parts of POE particles, 0.5~3.5 part of bulking agent, modified nano powder 10
~25 parts, 0.5~1.5 part of antioxidant, 0.15~0.5 part of light stabilizer, by above-mentioned each composition, low speed is fully mixed in high mixer
Close, then obtain A layer film master batches through double screw extruder fusion plastification, extrusion, granulation；
B layer film master batches：100 parts of POE particulate materials, 10~20 parts of modified nano powder, 0.2~1.0 part of antioxidant, light stabilizer
0.05~0.5 part, above-mentioned each composition low speed in high mixer is sufficiently mixed, then through double screw extruder fusion plastification, squeeze
Go out, be granulated and obtain B layer film master batches；
(3) preparation of modified film material：
A layer modified film material：20 parts of 100 parts of PP particulate materials and A layer films master batch are well mixed in high mixer high speed, it is standby
With；
B layer modified film material：20 parts of 100 parts of POE particulate materials and B layer films master batch are well mixed in high mixer high speed, it is standby
With；
(4) preparation of film-fibre：
First by A layer modified film material and B layer modified films the material fusion plastification in single screw extrusion machine respectively, then lead to successively
Cross measuring pump, filter and melt distributor by two kinds of modified film material by certain mass ratio co-extrusion for laminated film, then according to
It is secondary through supercooling, cut into bar, first time multiple roll hot-stretch, infrared baking oven heating, second multiple roll hot-stretch, mechanical membrane split
Polypropylene film-fibre is made in fine, thermal finalization.
2. the preparation method of polypropylene film-fibre according to claim 1, it is characterised in that the dissaving polymer
Including Hyperbranched Polyester Resin, ultrabranching polyamide resin, hyperbranched polyether or super branched polyurethane resin.
3. the preparation method of polypropylene film-fibre according to claim 2, it is characterised in that the dissaving polymer
Including Hyperbranched Polyester Resin.
4. the preparation method of polypropylene film-fibre according to claim 1, it is characterised in that the nano-powder includes
At least one of nano titanium oxide, nano silicon and nano-tourmaline powder.
5. the preparation method of polypropylene film-fibre according to claim 1, it is characterised in that the PP particulate materials are molten
It is 0.5~7.0g/10min to melt index, and isotacticity is more than 95% PP particulate materials.
6. the preparation method of polypropylene film-fibre according to claim 1, it is characterised in that the POE particulate materials bag
Ethene and butylene copolymer or ethene and octene copolymer are included, ethylene contents are 10~30%, and melt index is 0.5~8.0g/
10min。
7. the preparation method of polypropylene film-fibre according to claim 1, it is characterised in that the bulking agent includes
PP-g-GMA, PP-g-GMA/St, PP-g-MAH, POE-g-MAH, POE-g-PMAH or POE-g-GMA.
8. the preparation method of polypropylene film-fibre according to claim 1, it is characterised in that the A layers modified film
The mass ratio of material and B layer modified film material is 70:30~90:10.
9. the preparation method of polypropylene film-fibre according to claim 8, it is characterised in that the A layers modified film
The mass ratio of material and B layer modified film material is 80:20~85:15.
10. the preparation method of polypropylene film-fibre according to claim 1, it is characterised in that the laminated film can
For AB double membrane structures or BAB trilamellar membrane structures.
11. the preparation method of polypropylene film-fibre according to claim 1, it is characterised in that the multiple roll hot-stretch
Temperature is 100~125 DEG C, and the linear velocity of first roller is 5~50m/min, and draw ratio is 1.5~8.
12. the preparation method of polypropylene film-fibre according to claim 1, it is characterised in that the mechanical membrane splits
Fibre is 30~120 pins/cm using the pin density of porcupine roller.
13. the preparation method of polypropylene film-fibre according to claim 1, it is characterised in that the mechanical membrane splits
Fibre is 50~85 ° using all pins of porcupine roller and the angle of film traffic direction.
14. the preparation method of polypropylene film-fibre according to claim 1, it is characterised in that the heat setting temperature
For 90~125 DEG C.
15. polypropylene film-fibre, it is characterised in that the polypropylene prepared containing method any one of claim 1~14
Film-fibre.
16. air filting material, it is characterised in that containing the polypropylene film-fibre described in claim 15.
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| CN110565195A (en) * | 2018-06-06 | 2019-12-13 | 徐州和平化纤有限公司 | Polypropylene split film corrugated yarn and preparation method thereof |
| CN110684284A (en) * | 2019-11-11 | 2020-01-14 | 南通新帝克单丝科技股份有限公司 | High-strength polypropylene film yarn and preparation method thereof |
| CN110987635B (en) * | 2019-11-15 | 2021-11-30 | 河海大学 | Test device of soil core wall water conservancy splitting |
| CN112300486B (en) * | 2020-09-30 | 2023-07-07 | 浙江太湖远大新材料股份有限公司 | Polypropylene with low odor, high fluidity and long electret efficiency |
| CN113215674B (en) * | 2021-06-28 | 2022-03-04 | 江南大学 | Nanofiber, preparation method and application thereof |
| CN114182372A (en) * | 2021-10-18 | 2022-03-15 | 浙江理工大学 | Preparation method of superfine flat yarn |
| CN114108114A (en) * | 2021-10-18 | 2022-03-01 | 浙江古纤道股份有限公司 | Preparation method of split type superfine flat yarn |
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| JPH08332328A (en) * | 1995-04-06 | 1996-12-17 | Sun Lex Kogyo Kk | Filter and usage thereof |
| ATE375252T1 (en) * | 2001-07-19 | 2007-10-15 | Lankhorst Pure Composites Bv | POLYOLEFIN FILM, TAPE OR YARN |
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