CN1784459A - Alkyl acrylate copolymer modified oriented polypropylene films,tapes,fibers and nonwoven textiles - Google Patents
Alkyl acrylate copolymer modified oriented polypropylene films,tapes,fibers and nonwoven textiles Download PDFInfo
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- CN1784459A CN1784459A CN 200480011855 CN200480011855A CN1784459A CN 1784459 A CN1784459 A CN 1784459A CN 200480011855 CN200480011855 CN 200480011855 CN 200480011855 A CN200480011855 A CN 200480011855A CN 1784459 A CN1784459 A CN 1784459A
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Abstract
Disclosed are films, tapes, slit film fibers and melt-spun fibers comprising (a) at least one polypropylene polymer selected from the group consisting of polypropylene homopolymers; random copolymers or block copolymers of polypropylene and ethylene; and random terpolymers or block terpolymers of polypropylene, ethylene and one other olefin; and (b) from 1 to 30 weight % of at least one ethylene/ alkyl acrylate copolymer. The tapes can be stretched (i.e. uniaxially oriented) to provide monofilament slit film fibers. Also disclosed are processes for preparing such fibers. Also disclosed are nonwoven textiles prepared from the melt-spun fibers.
Description
Technical field
The present invention relates to comprise polyacrylic film, band and fiber with the ethylene/alkyl acrylate copolymer modification.The invention still further relates to nonwoven textiles with the melt spun fibre preparation of the polypropene composition of these modifications preparation.The invention still further relates to the method for the slit fibre of the polypropene composition for preparing these modifications.
Background technology
Comprise polyacrylic oriented film and can adopt the molten polymer preparation by multiple methods known in the art.Film can utilize stretching device pass through hot-drawn in the vertical and annealing and in one direction the orientation.Film also can utilize suitable stretching device to go up orientation at both direction (vertical and horizontal).The polypropylene film of orientation can be used in the multiple packaging application.
Comprising polyacrylic fiber can directly adopt molten polymer to prepare by multiple methods known in the art, and described method comprises melt-spun, centrifugal spinning and melts and sprays.
Also available extrusion molding polypropylene (PP) homopolymer of fiber or copolymer film preparation.Flat film can be extruded in the cooling bath or quenching on the cooling roller.Perhaps, tubular blown film can be pressed through annular die and air quenched.Film with quenching is cut into band with the cutter groove subsequently.Subsequently these bands are made their elongations (being uniaxial orientation) several times to original length by the elongation band anneal that stretching device hot-drawn in the vertical also will have controlled width (for example about 2.5mm is to about 6.5mm).The band of elongation provides monfil.
Melt spun fibre can join in the nonwoven textiles by many technology, and described technology comprises dry-laying, wet laid random web, air, spun-bond process, spray network method and needle punching.During so the non-woven product of making can be used for using widely, comprise clothes, carpet backing fabric, agricultural cloth and geotextile.
Polypropylene fibre can be used for cord or rope or is used to prepare the carpet yarn.Polypropylene fibre also can be woven or knitted into the fabric that is used for multiple application, for example oilcloth, liner, flag, bagging, carpet backing fabric, agricultural cloth and geotextile.
For reducing cost, need with the slit film yarn Woven fabric of elongation:
Reduce the fiber number (width constant but thickness attenuation) of band
Increase the width (having similar thickness) of band and by reducing the structure (for example being reduced to 5 * 5 band/square inch structures) that band number on each yardstick reduces Woven fabric from 8 * 8 band/square inches; And/or
Increase (the CaCO for example of inert filler in the polypropylene preparation
3) amount.
The polypropene composition that adopts conventional being used to prepare band is difficult to reach all above-mentioned targets.The higher elongation and the fiber number of minimizing can cause unacceptable physicals loss.Also must overcome the undesirable fibrillation effect of PP band under high elongation rate.
Equally, also need to provide the oriented polypropylene films and the fiber of mechanical property (for example tensile failure load, tensile strength (tensile failure stress) and elongation at break) with improvement.
Polypropylene fibre with mechanical property of improvement makes by a small amount of additive is added polypropylene.For example PCT patent application bulletin WO 2003/048434 has described the method for the additive preparation polypropylene monofilament of forming by the combination by lubricant, weighting agent and thermo-stabilizer of adding 0.1 to 20%.European patent EP 0080274B1 has described by adding 0.1 to 10% the another kind of polymkeric substance that is immiscible in melt polypropylene (particularly polyhexamethylene adipamide) and has prepared the method for polypropylene melt-spun fiber.Polypropylene also comes modification (journal of applied, 1986,31 (8) in addition by adding a small amount of liquid crystalline polymers, polyethylene, polyoxyethylene glycol and nylon 66,2753-68 (Journal of Applied Polymer Science, 1986,31 (8), 2753-68)).The improvement of improved composition mechanical property reduces owing to spun orientation or winding speed suppresses.
The blend of polypropylene and ethylene/alkyl acrylate copolymer is disclosed (referring to for example United States Patent (USP) 3,433,573).
Disclosure of the Invention
The present invention relates to raising and the tensile strength of melt-spun polypropylene fibre and the raising of elongation at break (%) of the mechanical property (for example tensile failure load, tensile strength (tensile failure stress) and elongation at break (%)) of a polypropylene stretched film and band.These raisings are that (the PP preparation can be chosen wantonly and comprise other and be selected from weighting agent (as CaCO by the ethylene/alkyl acrylate copolymer of a small amount of percentage (1 to 30, preferred 1 to 15% weight) being added the PP preparation that is used to prepare film and fiber
3) and the material of additive (as UV stablizer, pigment etc.)) in and realize.The blend of ethylene/alkyl acrylate copolymer and PP also improves the processing characteristics of PP resin by the melt strength that for example improves fusion PP resin.These blends provide the film of the improvement that is higher than conventional polypropylene film and fiber and the stretchiness and the calenderability of fiber.Calenderability by the band of these blends preparation in manufacturing processed, improve (can be under the situation of the calendering rate that improves blend and do not have or reduced the fibrillation effect of band).The benefit of modified polypropene blend higher tensile strength when comprising identical band or fibre number, and do not have the elongation at break loss.
The modified polypropene blend also can be by producing and unmodified fiber has the meticulousr polypropylene fibre of the fiber number of identical performance level and reduces cost under identical device turnout condition.Perhaps, can obtain the more high-throughput that having of identical fiber number improved performance.Blend described herein is owing to the production down time that interrupts still less having reduced most technologies.
A target of the present invention is to improve the mechanical property of polypropene composition that is used for film, melt spun fibre, slit film yarn and is derived from their fiber, for example tensile failure load, tensile strength and elongation at break by ethylene/alkyl acrylate copolymer being added PP resin formulation (being used to prepare polypropene composition).
Another target of the present invention is by the ethylene/alkyl acrylate copolymer that adds certain level in the polypropylene preparation or uses ethylene/alkyl acrylate copolymer to improve as resin carrier (being used to load weighting agent) or keep and be loaded with higher levels of inert filler (CaCO for example
3) the elastic properties of homopolymer polypropylene preparation.Target is to improve the stretchiness of film, band and slit fibre and do not have the extensibility loss of energy.
Another target of the present invention is to improve the processing characteristics of PP preparation by adding a small amount of percentile ethylene/alkyl acrylate copolymer.In general, adopt the efficient of cooling roller cooling cast film (before cutting film) to be lower than the employing cooling bath.The stretchiness of refrigerative film is bad on cooling roller, because slow more cooling causes containing more crystalline films.The adding of ethylene/alkyl acrylate copolymer has improved the stretchiness of film, and overcomes or reduced the fibrillation effect of slit film yarn in follow-up stretching by this class film preparation.It has also improved the calenderability of melt spun fibre, and has improved the elongation performance of oriented fibre.
Another target of the present invention is to improve to have the more tensile property of the tension belt of low-titer (tensile failure load, tensile strength and elongation at break).
The other benefit of modified polypropene blend described herein comprises the homogeneity of the improvement of film and fiber thickness and width, the static of minimizing and the wear resistance of improvement.
Therefore, the invention provides a kind of film by the preparation of compositions that comprises following component
(a) at least a homopolymer polypropylene that is selected from, the random copolymers of propylene and ethene or segmented copolymer, the polyacrylic polymer of the random or ternary block polymer of the ternary of propylene, ethene and a kind of other alkene; With
(b) at least a ethylene/alkyl acrylate copolymer of 1 to 30% weight.
The present invention also provides the slit film yarn by described film preparation.
The present invention also provides the fiber that is made by the slit film yarn of described film preparation by hot-drawn and annealing.
The present invention further provides melt spun fibre by the preparation of compositions that comprises following component
(a) at least a homopolymer polypropylene that is selected from, the random copolymers of propylene and ethene or segmented copolymer, the polyacrylic polymer of the random or ternary block polymer of the ternary of propylene, ethene and a kind of other alkene; With
(b) at least a ethylene/alkyl acrylate copolymer of 1 to 15% weight.
The present invention also provides the nonwoven textiles by aforesaid melt spun fibre preparation.
Use the benefit of modified polypropene blend described herein to comprise that tensile strength, " low speed " perforation and " at a high speed " perforation all improve.
The present invention also provides film, slit film yarn, fiber (for example slit fibre or melt spun fibre) and nonwoven textiles, and wherein composition further comprises at least a other component that is selected from weighting agent, matting agent, UV stablizer, pigment and other additives of (c) 0.01 to 40% weight as mentioned above.
The present invention also provides the method for preparing slit fibre, and described method comprises:
(1) preparation comprises the composition of following component
(a) at least a homopolymer polypropylene that is selected from, the random copolymers of propylene and ethene or segmented copolymer, the polyacrylic polymer of the random or ternary block polymer of the ternary of propylene, ethene and a kind of other alkene;
(b) at least a ethylene/alkyl acrylate copolymer of 1 to 30% weight; With optional
(c) at least a other component that is selected from weighting agent, matting agent, UV stablizer, pigment and other additives of 0.01 to 40% weight;
(2) make described composition forming film;
(3) described film is cut into band;
(4) band of hot-drawn and annealing steps (3).
Detailed Description Of The Invention
" multipolymer " is meant the polymkeric substance that comprises two or more different monomers.Term " copolymer " and " terpolymer " refer to only comprise the polymkeric substance of two kinds and three kinds different monomers respectively.Phrase " various monomeric multipolymer " is meant that its unit is derived from various monomeric multipolymers.
As mentioned above, film of the present invention, band and fiber are to be made by the composition that comprises with the acrylic resin of ethylene/alkyl acrylate copolymer modification.
Polypropylene (being abbreviated as PP) polymkeric substance comprises homopolymer, random copolymers, segmented copolymer and the terpolymer of propylene.Propylene copolymer comprises the multipolymer of propylene and other alkene (for example ethene, 1-butylene, 2-butylene and various pentene isomers etc.), and the multipolymer of preferred propylene and ethene.The terpolymer of propylene comprises the multipolymer of propylene and ethene and a kind of other alkene.Random copolymers (being also referred to as statistical copolymer) be propylene and comonomer on polymer chain with polymkeric substance corresponding to the ratio stochastic distribution of propylene/comonomer feed ratio.The chain segment that the chain segment that segmented copolymer is made up of alfon and the random copolymers of for example propylene and ethene are formed is formed.Term used herein " polypropylene " typically refers to any or all of polymkeric substance that comprises aforesaid propylene.
Homopolymer polypropylene or random copolymers can be by any known method preparations.For example polyacrylic polymer can based on organometallics and comprise titanous chloride the solid ziegler-natta catalyst systems in the presence of make.
Segmented copolymer can be by the preparation of similar method, and different is propylene is usually at first auto-polymerization of fs, and propylene and other comonomer (for example ethene) carry out polymerization in the presence of the polymkeric substance of fs gained in subordinate phase subsequently.Each of these stages is all can be in the suspension of for example hydrocarbon diluent, in the suspension of liquid propene or in the gaseous state continuous or discontinuous at same reactor or independently carry out in the different reactor.
Can see the 4.4th and 4.7 chapters (chapters 4.4 and 4.7 of the work " Block Copolymers " the edited by D.C.Allport and W.H.Janes that are set forth in " segmented copolymer " that the D.C.Allport that published in 1973 by company limited of applied science press and W.H.Janes write especially about the other information of segmented copolymer and their preparation, publishedby Applied Science Publishers Ltd in 1973), the document is attached to herein by reference.
Term " ethylene/alkyl acrylate copolymer " comprises the multipolymer of ethene and alkyl acrylate, and wherein moieties comprises 1 to 6 carbon atom.The example of alkyl acrylate comprises methyl acrylate, ethyl propenoate and butyl acrylate." ethylene/methyl acrylate (being abbreviated as EMA) " is meant the multipolymer of ethene (being abbreviated as E) and methyl acrylate (being abbreviated as MA)." ethylene/ethyl acrylate (being abbreviated as EEA) " is meant the multipolymer of ethene (being abbreviated as E) and ethyl propenoate (being abbreviated as EA)." ethylene/butyl acrylate (being abbreviated as EBA) " is meant the multipolymer of ethene (being abbreviated as E) and butyl acrylate (being abbreviated as BA).
The relative consumption that adds the alkyl acrylate comonomer in the ethylene/alkyl acrylate copolymer is wide variation in principle, from weight percent seldom count to up to the multipolymer gross weight 40% or higher.Equally, the selection of alkyl also can be in principle from the alkyl (have or do not have significant branching) of simple methyl up to 6 carbon atoms.It is the factor that how to play polar polymer component and degree size thereof in thermoplastic compounds that the relative consumption of the alkyl in the alkyl acrylate comonomer and selection can be counted as the ethylene copolymer of determining gained.
Alkyl in the preferred alkyl acrylate comonomer is 1 to 4 carbon atom, and the concentration of alkyl acrylate comonomer accounts for 5 to 30% weight of ethylene/alkyl acrylate copolymer, preferred 10 to 25% weight.Most preferably the alkyl in the alkyl acrylate comonomer is a methyl.
Ethylene/alkyl acrylate copolymer can utilize autoclave or tubular reactor to prepare by the method for knowing in the polymer arts.Copolymerization can be used as successive processes to carry out in autoclave: with ethene, alkyl acrylate and optional solvent (for example methyl alcohol) (referring to United States Patent (USP) 5,028,674) supply in the agitated autoclave of United States Patent (USP) 2,897, the 183 disclosed types that contain initiator.Interpolation speed depends on various variablees, for example the monomer concentration in the reaction mixture of polymeric reaction temperature, pressure, the alkyl acrylate monomer that is adopted and needs acquisition target multipolymer composition.In some cases, may need to adopt telogen (for example propane) to control molecular weight.Reaction mixture is removed from autoclave continuously.After reaction mixture leaves reaction vessel, multipolymer is separated from unreacted monomer and solvent (if using solvent) by ordinary method, not polymeric material and solvent are evaporated in the intensification of for example reducing pressure.
As generally known in the art, the ethylene/alkyl acrylate copolymer of tubular reactor produced can be different from the ethylene/alkyl acrylate of more conventional autoclave preparation.Therefore, term or phrase " tubular reactor produced " ethylene/alkyl acrylate copolymer, for target of the present invention, be meant the ethylene copolymer for preparing under tubular reactor or similar reactor mesohigh and high temperature, the inherent differential responses kinetics of therein ethylene and alkyl acrylate comonomer obtains mitigation or part compensation by monomer importing of having a mind to along reaction glide path in tubular reactor.As generally known in the art, this tubular reactor copolymerization reaction technology is prepared the multipolymer that has along the higher relative degree of irregularity of the main polymer chain multipolymer of block distributed (more near), to reduce existing and preparing so that high-melting-point is the multipolymer of feature with respect to having more with identical comonomer ratio, for the multipolymer for preparing in the high pressure agitated autoclave reactor of long chain branches.Generally speaking, the rigidity of the ethylene/alkyl acrylate copolymer of tubular reactor produced and elasticity are than the rigidity and the elasticity height of the ethylene/alkyl acrylate copolymer of autoclave preparation.
Ethylene/alkyl acrylate copolymer with tubular reactor produced of this attribute can be available from E.I.du Pont de Nemours ﹠amp; Co., Wilmington, Delaware.
The actual fabrication of foregoing tubular reactor ethylene/alkyl acrylate copolymer is preferably carried out in the tubular reactor under the High Temperature High Pressure and under the condition that has other reactant comonomer to import along reaction tubes, carries out and be not only in the high temperature and high pressure high pressure tank reactor that stirs.Yet, be understandable that similar ethylene/alkyl acrylate copolymer material can prepare in a series of autoclave reactors, wherein the comonomer replacement realizes by a plurality of districts importing of reactant comonomer, as United States Patent (USP) 3,350,372,3,756,996 and 5,532,066 instruction.Equally, these materials with high melting point should be target of the present invention and treat on an equal basis.
Comparison for the multipolymer of the ethylene/alkyl acrylate copolymer that further illustrates and describe tubular reactor produced and the preparation of conventional autoclave, following commercially available ethylene/methyl acrylate copolymer and fusing point data presentation thereof go out tubular type EMA resin and have significantly higher fusing point of relatively high pressure still EMA, and this is owing to have very different MA distributions along polymer chain:
The multipolymer of autoclave preparation
Mp=76 ℃ of EMA-A1 (MA of 21.5% weight)
Mp=69 ℃ of EMA-A2 (MA of 24% weight)
Mp=80 ℃ of EMA-A3 (MA of 20% weight)
Mp=73 ℃ of EMA-A4 (MA of 24% weight).
The multipolymer of tubular reactor produced
Mp=88 ℃ of EMA-T1 (MA of 25% weight)
Mp=95 ℃ of EMA-T2 (MA of 20% weight).
About the other discussion of difference between ethylene/alkyl acrylate copolymer tubular reactor produced and autoclave preparation referring to Richard T.Chou, Mimi Y.Keating and Lester J.Hughes are published in plastic engineering association technology annual meeting (2002), 60th (the 2nd volume), " adopting the high flexible EMA of high pressure tubular prepared " (Richard T.Chou of 1832-1836 page or leaf, Mimi Y.Keating and Lester J.Hughes, " High Flexibility EMAmade from High Pressure Tubular Process ", Annual TechnicalConference-Society of Plastics Engineers (2002), 60th (Vol.2), 1832-1836).CODEN：ACPED4 ISSN：0272-5223；AN 2002：572809；CAPLUS。
Be applicable to that ethylene/alkyl acrylate copolymer of the present invention derives from DuPont.The specific examples of ethylene/alkyl acrylate copolymer that derives from the tubular reactor produced of DuPont sees Table A.
Table A
| Ethylene alkyl acrylate copolymer | Alkyl acrylate % weight | Melt flow (g/10min) |
| EMA EMA EMA EMA EMA EMA EMA EMA EMA EEA EEA EEA EEA EBA EBA EBA EBA EBA EBA | 25 25 9 14 18 24 9 20 13 12 16 15 15 7 7 17 17 27 17 | 0.4 0.6 2 2 2 2 6 8 9 1 1 6 7 1.1 1.1 1.5 1.8 4 7 |
But be applicable to the molecular weight noticeable change of ethylene/alkyl acrylate copolymer of the present invention, be about 10 EMA to the maximum proves as the numerical value of melt flow index.The special selection degree that is used for the ethylene/alkyl acrylate copolymer component of modified polypropene is subjected to the influence of balance factor, for example the draft temperature of properties-correcting agent and polyacrylic melt flow index, relevant ethylene/alkyl acrylate copolymer and polypropylene softening temperature separately and the stress strain curve (rate of extension and stretch ratio) of expection.Other factors that in the selection of ethylene/alkyl acrylate copolymer, need to consider comprise the raising relevant with higher relative molecular weight multipolymer (the E/25% weight MA that for example has 0.7MI) elastic recovery and with the relevant virtual rating that is easier to blending weighting agent (referring to following) of low-molecular weight copolymer (the E/20% weight MA that for example has 8MI) relatively more.
Being used for ethylene/alkyl acrylate copolymer of the present invention and polyacrylic composition can be by do mixing, granular mixing, melt-mixing, preparing by mixture and other blending meanss known in the art of pushing various components.
Be used for composition of the present invention can choose wantonly further comprise consumption can be up to the weighting agent (lime carbonate (CaCO for example of 30 to 40% weight of band composition
3)).For example, in some slit film yarns, can there be 0.01 to 20% weight, 0.1 to 15% weight, about 2 CaCO to about 10% weight
3Ethylene/alkyl acrylate copolymer described herein has improved the consistency between polypropylene-based resin and the optional weighting agent.The consistency that improves can reduce in " dedusting " intensity (by causing weighting agent and separating of acrylic resin), the process operation process in the air CaCO still less
3The wearing and tearing of the minimizing of particle and woven or knitting equipment.The use of ethylene/alkyl acrylate copolymer properties-correcting agent described herein also provides higher weighting agent load.
Be used for composition of the present invention and can choose wantonly and further comprise other additives, for example matting agent (TiO for example
2), UV stablizer, pigment etc.These additives are known by film, slit fibre and melt spun fibre field.The amount of these conventional ingredients in the present composition can be 0.01 to 20% weight, preferred 0.1 to 15% weight.
Optional the joining of this class conventional ingredient comprised with being undertaken by any known method in the polyacrylic composition of ethylene/alkyl acrylate copolymer modification.This adding can by for example do to mix, the mixture of the various components of extruding, masterbatch technique by routine wait and carry out.Typical colour masterbatch can comprise the CaCO of 75 to 90% weight
3It should be noted that and comprise CaCO
3Colour masterbatch and the purposes of ethylene/alkyl acrylate copolymer properties-correcting agent.
Thermoplastic compounds described herein is applicable to by extruding processing and prepares film and fiber.
Film of the present invention (can be used for preparing slit film yarn and fiber) can prepare by any film well known by persons skilled in the art.Therefore, film and membrane structure usually can by the whole bag of tricks (for example blown film, mechanical stretching etc.) comprise orientation (single shaft or twin shaft) curtain coating, extrude, coextrusion etc.Be understandable that usually the various additives of practice in the art can be present in separately the thin film layer (comprise and be present in laminated film tack coat etc.), condition is the attribute that their existence can not change film or membrane structure basically.Therefore, can be contemplated that and adopt various additives for example antioxidant and thermo-stabilizer, ultraviolet (UV) photostabilizer, pigment and dyestuff, weighting agent, matting agent, slipproofing agent, softening agent and other processing aids etc. have benefit.
In one embodiment, film forms by extrusion method, and described extrusion method causes the polymer chain in the film to be arranged along extruding direction usually.Line polymer has significant intensity on differently-oriented directivity after through the height uniaxial orientation, and less in horizontal intensity.This being arranged in extruded direction (corresponding to the length dimension of cutting the film yarn) and gone up film is gained in strength.Perhaps, film can prepare by blowing process well known by persons skilled in the art.
The invention provides film by the preparation of compositions that comprises polypropylene and ethylene/alkyl acrylate copolymer.Film can not be orientated, the single shaft direction is orientated (for example vertical) or biaxially oriented orientation (for example vertical and horizontal).
Film can be used for widely comprising shrink film in the packaging application.As mentioned above, film also can be used for preparing slit film yarn and fiber.
The preferred film of the present invention comprises:
The amount of the described alkyl acrylate in the preferred 1. wherein said ethylene/alkyl acrylate copolymers is about 5 films to about 30% weight.
Preferred 2. preferred 1 film, the amount of the described alkyl acrylate in the wherein said ethylene/alkyl acrylate copolymer are about 10 to about 25% weight.
Preferred 3. preferred 2 film, wherein said alkyl acrylate is selected from methyl acrylate, ethyl propenoate and butyl acrylate.
Preferred 4. preferred 3 film, wherein said alkyl acrylate are methyl acrylate.
Each film in preferred 5. preferred 1 to preferred 4, the amount of wherein said component (b) accounts for 2 to 30% of composition total weight, and perhaps 2 to 20%, perhaps 2 to 10%.
Each film in preferred 6. preferred 1 to preferred 5, described film further comprises
(c) at least a other component that is selected from weighting agent, matting agent, UV stablizer, pigment and other additives of 0.01 to 40% weight.
Preferred 7. preferred 6 film, the amount of wherein said component (c) are 0.1 to 15% weight.
Each film in preferred 8. preferred 1 to preferred 7, quenching makes described film in the cooling bath by described composition is expressed into.
Each film in preferred 9. preferred 1 to preferred 7, quenching makes described film in the cooling roller by described composition is expressed into.
Each film in preferred 10. preferred 1 to preferred 7, described film makes by described composition is extruded to air cooled tubular blown film by annular die.
Each film in preferred 11. preferred 1 to preferred 10, wherein said composition comprises the ethylene/alkyl acrylate copolymer of tubular reactor produced.
The present invention also provides the slit film yarn that is made by film of the present invention.Preferred band is made by preferred above-mentioned film.
The present invention also provides the fiber that makes by hot-drawn and the slit film yarn that made by described film of annealing.Preferred fiber is made by band (by above-mentioned preferred film preparation).
The present invention also provides the method for preparing slit fibre.Preferable methods is to adopt above-mentioned preferred film.
As described, slit fibre is to be formed by polymer materials, and described polymer materials forms film, is cut into band and by hot-drawn.
Woven or knitting textiles can be made by above-mentioned slit fibre.Preferred woven or knitting textiles is to be made by above-mentioned optimum fiber.
For knowing, the film that described method is extruded by the composition that comprises this base polymer by cutting is finished based on the method for the slit fibre of polyacrylic polymer in preparation.These conventional purposes of cutting the film monfil comprise rope and cord manufacturing, and synthetic dusting cover is with fiber and bagging, carpet backing fabric or geotextile woven fabric.
Preparing slit fibre itself by above-mentioned composition can carry out according to any known method.For example may prepare primary film by adopting so-called " blown film " or " flat-die " method to extrude described composition.Blown film is by polymer composition is extruded by annular die, and provides blown film with the tubular-film of gained with the airflow expanding and make.The cast flat film is to make by described composition is extruded by flat-die.The film that leaves mould includes the roller (cooling roller) of circulating fluid by at least one or cools off by water-bath provides cast film.The width of film of the present invention is for example about 60cm (2 feet).Subsequently this primary film is cut into slit film yarn, described slit film yarn was drawn before being wound on the reel is monfil.
Slit film yarn can utilize cutting unit to prepare, described cutting unit comprises support, a plurality ofly is located substantially on conplane cutters, and each cutter comprises opposite cutting edge and opposite end, be used for that cutters are installed to the assembly structure of support and be connected to support and be configured to above the exposed cutting edge of blade feeding roller along downstream direction feeding film.Assembly structure is configured to by being essentially delegation, parallel and spaced apart relation installation cutters, wherein the installation of blade makes each blade expose one cutting edge to be used for cutting, and wherein contiguous blade cutting edge each other spaced apart be that about 6mm is to 8mm.
After film is cut into above-mentioned band, stretched operation will carry out in baking oven on the span of 3 to 6 meters (10 to 20 feet), and described baking oven for heating promotes stretched operation to the temperature of effective soften film.Usually generation is, film is cold in the starting point of the passage that passes baking oven, and along with film passes baking oven, it is heated gradually and be softening.Constriction occurs on the neckline that is positioned at baking oven inlet certain distance.Multiple factor is depended in the position of necking down region, comprises the attribute and the thickness of draw speed, oven temperature and thin-film material.The thickness of typical preliminary draft band be about 120 microns and width for about 6mm to 8mm.After the stretching, the thickness of the band of final gained be about 30 to 50 microns and width for about 2.5mm to 3mm.For specific end use, can prepare wideer or narrower band.For example the final width of the used fiber of the filament size woven fabric of Jian Shaoing arrives about 6mm for about 4mm.The final width of polypropylene tape spinning is that about 10mm is to 15mm.
Stretch ratio was generally about 2: 1 to about 16: 1, and the typical stretch ratio of some polymkeric substance is about 4: 1 to about 10: 1.The stretch ratio of woven belt is preferably about 5: 1 to about 8: 1.More the stretch ratio of broadband bar spinning band is common is about 10: 1 to about 15: 1.The distance that longitudinal stretching took place changes according to the technology that is adopted.In short distance stretched, the distance that occurs in several inches of stretching was last, and other technologies comprise bigger distance.After the hot-drawn, the fiber number of the monfil that is used for woven belt of gained is common to be about 700 to about 1700.The fiber number of polypropylene tape spinning is about 3000 to about 6000.
The mechanical property of band of the present invention (for example tensile strength, tensile failure load, elongation at break and fiber number) can be by regulating various parameters balance in addition, described parameter comprises
Resin formulation design (base resin, the additive (CaCO that is added
3, UV stablizer, pigment) level and type);
The amount of the ethylene/alkyl acrylate that is adopted and type;
The processing units of film and band (cooling, cutting, stretching and annealing configuration); With
Processing conditions (extruder screw configuration, temperature distribution and polymkeric substance throughput, stretching and annealing temperature and distribution, linear velocity etc.)
In general, be used to prepare the manufacturing facility of cutting the film yarn and revise the limited in one's ability of equipment and processing conditions.Therefore, the ethylene/alkyl acrylate modification of acrylic resin of the present invention can significantly improve the mechanical property by they prepared film, band and yarn.
As mentioned above, fiber also can comprise centrifugal spinning, melt spinning, spun-bond process and meltblown directly by the extrusion method preparation.
In centrifugal spinning, when quickening polymer melt, form fiber by the fast rotational source.The material of fusing of self-thermo furnace is sent to the rotary spinning machine, owing to centrifugal force is extruded material and is made fiber from the aperture of device for spinning side.
In melt spinning, form the material fusion of fiber and extrude and directly solidify by cooling subsequently by spinning jet.The melt spinning fiber can be extruded from spinning jet by different cross-sectional shapes (circle, trilobal, five leaf, octofoil etc.).Be wound on the rotation roller group that operates in controlled temperature and speed and realize at the strand of line drawing by will motion.According to concrete melt spinning technology and corresponding procedure of processing, product can be collected by the form of monofilament, yarn, tow or non-woven product (for example spunbonded type).The general reference of relevant melt spinning fiber is write referring to Rowland Hill
Synthetic polymeric fibers, Elsevier Publishing Co., NY, nineteen fifty-three (Fibers FRom Synthetic Polymers, Rowland Hill, ed., ElsevierPublishing Co., NY, 1953).
Spun-bond process is the direct lapping that derives from the nonwoven web of melt spun fibre.Continuous filament yarn is extruded, quickens (by roller or injector) and be layered on to form non-woven on the moving belt by spinning jet.The bonding fused fiber point of crossing that occurs in.
Melt jet is another kind of directly lapping method, and wherein fiber is extruded by die tip, logical superheated high-speed air drawing-down (and fracture), and deposit to and form fine (low-titer) fibrous reticulum on moving belt or the screen cloth.
Spun-bond process (S) and melt jet (M) net can further come bonding by calendering after formation and/or form decorative pattern.Multi-layer nonwoven product (for example SMS, SMMS, SMMMS) also can utilize fiber of the present invention to prepare.
The present invention further provides melt spun fibre by the above-mentioned composition preparation.Preferred melt spun fibre comprises:
The amount of the described alkyl acrylate in the preferred wherein said ethylene/alkyl acrylate copolymer of A. is about 5 fibers to about 30% weight.
The fiber of the preferred preferred A of B., the amount of the described alkyl acrylate in the wherein said ethylene/alkyl acrylate copolymer are about 10 to about 25% weight.
The fiber of the preferred preferred B of C., wherein said alkyl acrylate is selected from methyl acrylate, ethyl propenoate and butyl acrylate.
The fiber of the preferred preferred C of D., wherein said alkyl acrylate is a methyl acrylate.
The preferred preferred A of E. each fiber in the preferred D, the amount of wherein said component (b) is 2 to 10% weight.
The preferred preferred A of F. each fiber in the preferred E, described fiber further comprises
(c) at least a other component that is selected from weighting agent, matting agent, UV stablizer, pigment and other additives of 0.01 to 15% weight.
The fiber of the preferred preferred F of G., the amount of wherein said component (c) is 0.1 to 5% weight.
The preferred preferred A of H. each fiber in the preferred G, wherein said composition comprises the ethylene/alkyl acrylate copolymer of tubular reactor produced.
Nonwoven textiles can be prepared by aforesaid melt spun fibre.Preferred nonwoven textiles is prepared by above-mentioned optimum fiber.
Woven or knitting textiles can be prepared by aforesaid melt spun fibre.Preferred woven or knitting textiles is prepared by above-mentioned optimum fiber.
Oriented film is used for packaging application widely.As mentioned above, film of the present invention also can be used for preparation and cuts film bar fiber.
The fiber (comprise and cut film bar fiber) of described preparation of Clicking here can be used for preparing cord thread, cord or rope.Many fibers by for example twist, braiding, interlacing etc. combine and form cord thread.Cord generally comprises the fiber of low quantity and diameter less than rope.The cross section of these cord thread, cord or rope can be roughly circular or flat.Cord thread or cord can be used for the band rope of shoestring, bag and portfolio etc., and can be used in the packaging application.Rope can be used in wide industrial and the marine vessel applications.Cord thread, cord and rope also further interlacing (for example by knitting) prepare the net with relative open architecture, for example fishing net, cargo net etc.
The film bar fiber of cutting of the present invention can be used as monfil and is used for carpet tufting, synthetic dusting cover, mat etc.They also can be used as the tape spinning.
Woven or knitting textiles can be cut the preparation of film bar fiber or melt spun fibre by aforesaid.In general, woven fabric can have than knit goods structure more closely.The polypropylene yarn of described preparation of Clicking here can be woven for being used for for example strainer, oilcloth, canopy, canopy, flag, structure (for example roof cladding) film, machine band, leather trunk or packing material liner, heavily loaded bagging, carpet backing fabric, furniture lining face, clothes, agricultural cloth (being used for Seed Inspection, weed control, gardening, greenhouse and silage) and geotextile (being used for erosion control and Soil conservation).Knit goods can be used for bagging (being used to carry huge material for example groceries, firewood etc.) and building, industry and fishing net.
Use the woven fabric of modified poly propylene composition described herein to have lower tendency toward sliding, particularly to the load-carrying bag.
Nonwoven textiles of the present invention can be used for diaper and other are used for the article (for example adult-incontinence) and the lady's health product of Personal hygiene, medical clothes is cap, long gown, booties for example, Personal protective equipment comprises mouth mask etc., healthy prevention articles for use are coverlet, cover, blanket etc. for example, and packing material, durable paper, cleaning wiping cloth, coverture, flag, carpet backing fabric, filter cloth, geotextile, agricultural cloth, furniture serve as a contrast face, clothes, strainer, liner or is used for the architectural covering of the heat and the moisture controlled of buildings.
For carpet backing fabric, the contraction of textiles very important (for example 45 ℃ of following shrinking percentages less than 2.5% for catering to the need).Woven and nonwoven carpet base fabric comes to provide intensity, dimensional stability and profile for carpet as the elementary base fabric of carpet usually.They can cut film bar fiber or nonwoven fabric prepares by of the present invention.
Secondary carpet backing fabric can be used for providing substrate, and carpet yarn is anchored on the described substrate.They can be prepared by nonwoven material.Melt spun fibre of the present invention can be used for preparing the non-woven substrate that can be used as secondary carpet backing fabric.
Geotextile can be used for the gravel of road and paving layer with the road improvement quality of getting off.Geotextile fabric is that the woven PP of about 2.5mm brings manufacturing with width usually.The also available viscose non-woven material preparation that derives from melt spun fibre of geotextile.The shrinking percentage that the shrinking percentage of geotextile requires not resemble carpet backing fabric requires strictness.Yet endurable permeability is very important for geotextile.
Although specified and described the present invention with reference to embodiment preferred, those skilled in the art understand the various variations that can make form and details under the situation that does not break away from spirit of the present invention and category.
Following examples only are used to illustrate, and should not be construed as the described herein and/or claimed invention category of restriction.
Embodiment
Slit film yarn
Test 1
The resin formulation that the following stated is adopted in this test is carried out extruding on the casting machine.Film casting is arrived on cooling (quenching) roller.Subsequently film is cut into band and in the annealing baking oven, stretch 6 or 7X to 5mm be with.The stretching of band and annealing are carried out simultaneously.Carry out 15 minutes post-samplings and test tensile strength in manufacturing processed.The width that 250mm is long is that the band of 5.0mm is to stretch on the general tensile testing machine of 200mm/min in the pinblock velocity of separation.The results are shown in Table 2.
Material therefor
PP-1: homopolymer polypropylene, melt index (MI) are 3g/10min (ASTM D-1238, adopts the 2.16Kg quality by 230 ℃), derive from Titan Petrochemical (M) Sdn Bhd.
EMA-1: ethylene/alkyl acrylate copolymer, contain the methyl acrylate of 24% weight, MI is 2g/10min (ASTM D-1238, uses the 2.16Kg quality by 190 ℃).
Lime carbonate is weighting agent
Resin formulation:
Comparative example C1:PP-1 (99%)+CaCO
3(1%)
Embodiment 2:PP-1 (89%)+CaCO
3(1%)+EMA-1 (10%)
Embodiment 3:PP-1 (94%)+CaCO
3(1%)+EMA-1 (5%)
Table 2
| Comparative example C1 | Embodiment 2 | Embodiment 2 | Embodiment 3 | |
| Stretch ratio fiber number tension fracture load, (Kgf) tensile strength, (g dawn) elongation at break, (%) | 6 -- -- -- -- | 6.12 963 5.02 5.212 31 | 7.05 1178 6.05 5.136 27 | 6 1058 5.24 4.953 32 |
Stop to adopt the test of comparative example C1 (0%EMA-1), because processing characteristics is bad and unstable under the condition that is used for embodiment 2 and 3 (10% and 5%EMA-1).It in process of the test even at stretch ratio the fibrillation effect that has occurred under 6 the condition by the band of comparative example's 1 preparation.
Under the normal production conditions of using pure PP preparation (referring to comparative example 1), cast film is unstable under the high forcing machine throughput condition of (for example extruder screw speed is higher than 180rpm).Therefore the machine throughput hangs down also, and turnout also reduces.In addition, if stretch ratio improve exceed about 6, then begin to occur with fibrillation effect and the unusual disunity of the width of band.
By 5 to 10% EMA resin (for example EMA-1) is joined in the PP preparation, production can operation very smoothly under the high throughput condition, and highly stable from the cast film of forcing machine.New preparation has the melt strength that better processability can and be improved.
Slit film tapes can be elongated to 6 to 7 times and do not have fibrillation trend.The mechanical property (for example tensile strength, tensile failure load and elongation at break) of orientation band is satisfactory.
Test 2
This test is carried out extruding on the casting machine.With film quenching in cooling bath.Subsequently film is cut into band and stretches at least in the baking oven that 6X to 3mm is with in annealing.The stretching of band and annealing are carried out simultaneously.Carry out 15 minutes post-samplings and tested for tensile strength in manufacturing processed.The width that 250mm is long is that the band of 3.0mm is to stretch on the general tension tester of 200mm/min in the pinblock velocity of separation.The results are shown in Table 3.
Material therefor
PP-2: polypropylene homo resin, melt index (MI) are that (ASTMD-1238, derives from Titan Petrochemical (M) Sdn Bhd with the title of PD855 to 3g/10min by 230 ℃/2.16Kg).
Ethylene/alkyl acrylate copolymer contains the methyl acrylate (EMA-1) of 24% weight, and MI is 2g/10min (ASTM D-1238,190 ℃/2.16Kg).
The white colour masterbatch, tinting material/comprise CaCO
3Weighting agent.
Resin formulation
Comparative example C4 and C6:PP-2 (95%)+white colour masterbatch (5%)
Embodiment 5 and 7 to 9:PP-2 (90%)+white colour masterbatch (5%)+EMA-1 (5%)
Table 3
| Comparative example C4 | Embodiment 5 | Comparative example C6 | Embodiment 7 | Embodiment 8 | Embodiment 9 | |
| Stretch ratio fiber number tension fracture load (Kgf) tensile strength (g/denier) elongation at break (%) | 6 886 4.8 5.4 31 | 6 858 5.1 6.0 33 | 6 1075 5.6 5.2 30 | 6 1096 5.8 5.3 41 | 8 1016 6.7 6.8 26 | 7 736 4.6 6.2 28 |
The ethylene/alkyl acrylate copolymer of these test-results proof addings 5% in PP has improved the mechanical property of orientation PP band, for example tensile failure load, elongation at break and tensile strength.
Contrast has band (the comparative example C4 and the embodiment 5 of similar average size, comparative example C6 and embodiment 7), band by the PP preparation that adds 5% EMA demonstrates the relative standard PP band average elongation breaking load that tensile improves under similar stretch ratio, average elongation at break and average tensile strength.
The fracture of the average elongation of MODIFIED PP band (embodiment 8) is compared at standard (comparative example C6) or the MODIFIED PP band (embodiment 7) even more remarkable of standard tensile than (6X) following preparation with the improvement of average tensile strength under higher stretch ratio (8X) condition.
Have almost the same high with standard P P band with higher average size (comparative example C6) than the tensile properties of the MODIFIED PP band of harmonic(-)mean fiber number (embodiment 5).Adopt the MODIFIED PP low-titer band (embodiment 9) of high stretch ratio (7X) preparation to have and standard P P band (comparative example C4) similar average elongation breaking load and elongation at break, but have higher tensile strength.
Test 3
In these trials, various fibers prepare according to the mode that is suitable for adding the woven fabric that is applicable to geotextile.
PP-3: basic polypropylene material is by (Amoco GA 02 is MFI:1.8) with the tinting material (Ampacet Noir 190826) of 2% weight and the CaCO of 3.5% weight with polypropylene
3Weighting agent (Multibase ME 50004) blending and making is labeled as comparative example C10.Base mateiral PP-3 further prepares comparative example 11 with polyolefin copolymer (Booster PO) blending of 3% weight.The EMA-1 blending of base mateiral PP-3 and 5% weight or 3% weight prepares comparative example 12 and 13.
Processing conditions
Extrusion temperature: 255 ℃
Baking oven (stretching): 163 ℃
Cooling roller: 27 ℃
Input: 270-300kg/hr
Cast film width: 1250mm
Cast film thickness: 175-180 μ m
Bandwidth: 6mm before stretching
The back bandwidth stretches: about 2.5mm
Processing originates in 5%EMA-1 and stretch ratio is 7.Subsequently stretch ratio is brought up to 7.4 and 7.8 and improved intensity.
Table 4
| Stretch ratio | TEX[g/km] | Intensity [cN]/TEX | Elongation | |
| C10 C11 12 12 12 12 12 12 12 13 13 13 13 13 13 13 13 13 13 | 6 7 7 7.4 7.8 7.8 7.8 7.8 7.8 7.8 7.8 7.8 7.8 7.8 7.8 8 8 8.2 8.2 | 172 144 140 142 142 142 148 142 1 143 1 143 143.6 142.4 143.8 143.2 140 142.8 141.4 138 138.6 | 42 47-49 45 46 49.5 48 49 48.8 46.3 48.4 46.2 48 47 49 49 50.7 47.8 53.5 49.5 | 30 29 29.5 30.4 30 29.5 30.8 28.8 27.4 27.5 28.1 28.5 27.3 28.4 28 32.5 30.2 34.8 31.7 |
Note: after 1.2 hours.2. draw roll adjustment.3. oven temperature is 160 ℃.
Compare polypropylene (Embodiment C 10), proved more high strength and similar elongation under higher stretch ratio condition by the band of preparation of compositions of the present invention.Compare the Booster PO (Embodiment C 11) that polypropylene adds 3% weight, proved higher a little elongation and intensity under higher stretch ratio condition by the band of preparation of compositions of the present invention.
In addition, use ethylene/alkyl acrylate improved composition described herein to allow low slightly energy consumption and low slightly forcing machine pressure.
By in the PP preparation, adding ethylene/alkyl acrylate copolymer, can prepare
The low-titer band of high elongation, described band have very high tensile failure load and tensile strength and do not have significant elongation loss; Or
The high fiber number of high elongation (but wide thin) band, described band has the cost that the favorable mechanical performance reduces woven Fibre Bag or laminated substrates structure.
Nascent fibre
Test 4
The purpose of this test is the spinning properties (maximum calenderability) and the physical properties of comparison PP yarn and PP/EMA blending yarn.Various yarns the hot-rolling on the spinning machine between stretch, reel and test.The PP/EMA blend carries out the melt blending before spinning.
Material therefor
Comparative example C14:100%PP-4 (Profax
6323)
95%/5% blend of embodiment 15:PP-4 and EMA-1
90%/10% blend of embodiment 16:PP-4 and EMA-1
Spinning condition
245 ℃ of piece material temperature
Spinning jet 10 holes, 0.015 inch * 0.060 inch
60 ℃ of feeding roll temperatures
Feeding 500 yards/minute of speed of roller (ypm)
80 ℃ of draw roll temperature
Draw roll speed can change to determine maximum tension (for example, 1500ypm is used to obtain the stretching of 3X).
Table 5
| Embodiment | Stretch ratio | The yarn fiber number | Tensile strength (gd) | Elongation (%) | Modulus (gpd) | |||
| On average | SD | On average | SD | On average | SD | |||
| C14 C14 15 15 16 16 | 3.0 3.8 3.0 4.0 3.0 4.0 | 89.8 72.3 90.0 67.7 89.8 68.4 | 3.23 4.15 3.72 4.64 3.29 4.47 | 0.11 0.24 0.16 0.27 0.24 0.46 | 103.38 66.65 116.51 60.82 119.03 63.14 | 9.78 6.59 6.36 7.23 10.81 5.84 | 10.1 34.3 26.3 41.4 21.1 38.7 | 0.0 2.2 2.4 4.0 3.2 7.1 |
Add the initial modulus (demonstrating better calenderability) that ethylene/alkyl acrylate copolymer has improved the residual elongation rate and reduced single-stage stretching melt spinning polypropylene fibre.Thereby interpolation has also improved maximum spin-stretch ratio produces the intensity of desirably increase and/or the fiber number of reduction.
Test 5 and 6
Carry out two whole day spinning tests.First test adopts the blend that makes on twin screw mixing machine (mixture of melts) to carry out.Second test adopts the middle blended blend polymer of the mixed machine of bucket (dried blend) to carry out.Preparation has the blend of the EMA-1 of 5,10 and 15% weight.
Move in first test at the mixture of melts for preparing on the twin screw extruder:
Comparative example C17:100%PP-5 (polypropylene, MFI are 4)
95%/5% blend of embodiment 18:PP-5 and EMA-1
90%/10% blend of embodiment 19:PP-5 and EMA-1
Mixing the dried blend for preparing on the machine at bucket moves in second test:
95%/5% blend of embodiment 20:PP-5 and EMA-1
85%/15% blend of embodiment 21:PP-5 and EMA-1
The spinning condition of two tests:
240 ℃ of piece material temperature
240 ℃ of melt temperatures
Spinning jet 600 holes
137 ℃ of feeding roll temperatures
Feeding roller speed 600rpm
23 ℃ of draw roll temperature
Required stretch ratio (S.R.) (for example 1800rpm is corresponding to 3.0 S.R.) is depended in the variation of draw roll speed.
Table 6
| Mixture of melts | Comparative example C17 | Embodiment 18 | Embodiment 19 | |||||
| Maximal draw ratio | 2.5 | 3.5 | 3.5 | |||||
| Stretch ratio intensity (g/den) elongation at break (%) linear density (den) hardness (g/den) | 1.9 3.0 271 30 57 | 2.5 3.9 185 23 5.4 | 1.9 3.0 263 30 6.6 | 2.5 3.9 184 23 5.3 | 3 4.4 148 21 48 | 1.9 2.9 273 30 5.8 | 2.5 3.6 181 25 48 | 3 4.2 116 21 3.7 |
| Dried blend | Embodiment 20 | Embodiment 21 | ||||||
| Maximal draw ratio | 3.5 | 3.5 | ||||||
| Stretch ratio intensity (g/den) elongation at break (%) linear density (den) hardness (g/den) | 1.9 2.9 246 29 5.2 | 2.5 3.7 168 22 4.8 | 3 4.5 135 22 4.8 | 35 3.2 229 28 5.4 | 1.9 2.8 254 30 5.2 | 2.5 3.5 176 24 47 | 3 4.3 136 20 4.5 | 3.5 5 99 17 3.8 |
The blend spinning of PP and EMA-1 is good.Stretch ratio significantly improves, and intensity also is improved simultaneously.These tests demonstrate PP higher stretchiness (non-cracking) when adding ethylene/alkyl acrylate copolymer.If for the 100%PP maximal draw ratio is 2.5, the EMA-1 that adds 5,10 or 15% weight brings up to 3.5 with maximal draw ratio.Can also see that S.R. also is improved when improving tensile strength, but elongation at break reduces.
Test 7
The purpose of this test be with the temperature that raises under on the tension tester of baking oven coupling of test run(s) assessment by the stretchiness of the film of the PP preparation of unmodified and modification.
Material therefor:
Comparative example C22:100%PP-6 (Moplen T 30 S)
Comparative example C23:90%PP-6+10% weight Engage 8200 (metallocene catalysed polyethylene)
Embodiment 24:95%PP-6+5% weight EMA-1
Embodiment 25:90%PP-6+10% weight EMA-1
We prepare the thick dumb-bell shape sample of 0.5mm and measure their tensile properties under 100 ℃.More than 100 ℃, each sample can in the limit of testing installation, not rupture (maximum 1500%).The result that table 7 is reported is the mean value of 20 samples of each preparation of test under 100 ℃.
Table 7
| Embodiment | C22 | C23 | 24 | 25 |
| Tensile strength (MPa) elongation at break (%) | 26.7 1366 | 19.9 1286 | 21.1 1371 | 22.5 1440 |
As above shown in the table, 10%EMA-1 demonstrates 5% raising of relative 100%PP elongation at break.
Biaxially oriented film
Test 8
Each sample is by the polypropylene of melt blending and ethylene/alkyl acrylate copolymer prepares and form cast film by extruding subsequently.The equipment that is used to make biaxially oriented film has permission and carries out the tensile chucking appliance system at vertical and horizontal.
Comparative example C26:100%PP-7 (Basell HP 1078 homopolymer polypropylenes, MFI are 2)
The EMA-1 of the PP-7+5 weight of embodiment 27:95 weight
The EMA-1 of the PP-7+10 weight of embodiment 28:90% weight
Stretching condition is as follows:
The draw unit preheating: 145 ℃ were descended 30 or 40 seconds
Anchor clamps temperature: 82,88,100 or 105 ℃
Draw speed: 400%/second
Stretching after annealing temperature: 145 ℃
| Embodiment | Stretch ratio | The anchor clamps temperature | Warm up time | Tensile strength MD | Tensile strength TD | Elongation at break MD | Elongation at break TD |
| C26 | 6×6 | 100 | 40 | 175 | 164 | 89 | 72 |
| C26 | 6×6 | 100 | 40 | 169 | 168 | 91 | 85 |
| 27 | 6×6 | 100 | 40 | 164 | 178 | 88 | 99 |
| 27 | 6×6 | 100 | 40 | 176 | 184 | 89 | 75 |
| 28 | 6×6 | 100 | 40 | 160 | 152 | 98 | 106 |
| 28 | 6×6 | 100 | 40 | 161 | 177 | 88 | 87 |
| 28 | 6.5×6.5 | 100 | 40 | 177 | 176 | 76 | 83 |
| C26 | 5×9 | 100 | 40 | 128 | 226 | 182 | 53 |
| 27 | 5×9 | 100 | 40 | 125 | 232 | 180 | 34 |
| 28 | 5×9 | 100 | 40 | 133 | 239 | 143 | 47 |
| 27 | 5×9 | 88 | 40 | 122 | 294 | 151 | 37 |
| 27 | 5×9 | 100 | 30 | 144 | 257 | 191 | 49 |
| 27 | 5×9 | 82 | 30 | 114 | 326 | 251 | 36 |
| 28 | 7×7 | 105 | 40 | 179 | 175 | 89 | 86 |
| 28 | 7×7 | 105 | 40 | 189 | 188 | 83 | 77 |
In other above-mentioned tests, the stretchiness of the ethylene/alkyl acrylate modified polypropene blend of use draw roll is higher than the stretchiness of 100%PP.In this test, be difficult to carry out stretchiness relatively, because film ruptures on anchor clamps sometimes, these anchor clamps very little (high stress concentrations) and have big interval (about 10cm) each other.Yet on industrial equipments, MD stretches and always carries out with roller rather than anchor clamps.
Yet, can observe some and provide better tensile strength and the similar or higher elongation at break of relative 100% polypropylene based on higher stretching with the sample of the PP of EMA-1 modification.
For for 7 * 7 oriented films of 10%EMA-1 preparation, tensile strength (mean value of MD and TD) exceeds 8% and the loss of non-cracking elongation than 6 * 6 100%PP (the maximum biaxial stretch-formed property of PP).
For for 5 * 9 oriented films of 5%EMA-1 preparation, tensile strength (mean value of MD and TD) and elongation at break (mean value of MD and TD) are than exceeding 24% and 22% respectively at the 100%PP of identical stretch ratio 5 * 9.
Nonwoven fabric
Test 9
The purpose of this test is that assessment joins the effect for preparing nonwoven fabric in the polypropylene with ethylene/alkyl acrylate copolymer.
Nonwoven fabric is by utilizing 2 forcing machines feeding, 68 spinning parts and fiber is taped against moving belt prepares altogether.
Comparative example C29:100% homopolymer polypropylene PP-8, stretch ratio is 2.5: 1.
The EMA-1 of the PP-8+5% weight of embodiment 30:95% weight, stretch ratio are 3: 1.
The spinning condition of the fabric of embodiment 30 is:
240 ℃ of piece material temperature
240 ℃ of melt temperatures
137 ℃ of feeding roll temperatures
Feeding roller speed 600rpm
23 ℃ of draw roll temperature
Draw roll speed 1800rpm
These tests have demonstrated embodiment 30 the stretchiness that improves are provided.Embodiment 30 stretches by 3: 1 ratio, and the obtainable maximal draw ratio of comparative example C29 is 2.5: 1.Finished fabric embodiment 30 has under identical ground mass than the remarkable higher anti-pierceability of standard P P non-woven (comparative example C29).
Claims (40)
1. film by the preparation of compositions that comprises following component:
(a) at least a homopolymer polypropylene that is selected from, the random copolymers of propylene and ethene or segmented copolymer, the ternary atactic copolymer of propylene, ethene and a kind of other alkene or the polyacrylic polymer of ternary block polymer; With
(b) at least a ethylene/alkyl acrylate copolymer of 1 to 30% weight.
2. the film of claim 1, the amount of the described alkyl acrylate in the wherein said ethylene/alkyl acrylate copolymer are about 5 to about 30% weight.
3. the film of claim 3, the amount of the described alkyl acrylate in the wherein said ethylene/alkyl acrylate copolymer are about 10 to about 25% weight.
4. each film in the claim 1 to 3, wherein said alkyl acrylate is selected from methyl acrylate, ethyl propenoate and butyl acrylate.
5. the film of claim 4, wherein said alkyl acrylate is a methyl acrylate.
6. each film in the claim 1 to 5, the amount of wherein said component (b) is 2 to 30% weight.
7. the film of claim 6, the amount of wherein said component (b) is 2 to 20% weight.
8. the film of claim 6, the amount of wherein said component (b) is 2 to 10% weight.
9. each film in the claim 1 to 8, wherein said composition further comprises:
(c) at least a other component that is selected from weighting agent, matting agent, UV stablizer, pigment and other additives of 0.01 to 40% weight.
10. the film of claim 9, the amount of wherein said component (c) is 0.1 to 15% weight.
11. each film in the claim 1 to 10, quenching makes described film in the cooling bath by described composition is expressed into.
12. each film in the claim 1 to 10, quenching makes described film on the cooling roller by described composition is expressed into.
13. each film in the claim 1 to 10, described film forms tubular blown film by described composition is extruded by annular die, and through air quenched and make.
14. each film in the claim 1 to 13, wherein said composition comprises the ethylene/alkyl acrylate copolymer of tubular reactor produced.
15. a band, described band makes by each film in the cutting claim 1 to 14.
16. a fiber, described fiber makes by the band of hot-drawn and annealing claim 15.
17. a method for preparing fiber, described method comprises:
(1) preparation comprises the composition of following component
(a) at least a homopolymer polypropylene that is selected from, the random copolymers of propylene and ethene or segmented copolymer, the ternary atactic copolymer of propylene, ethene and a kind of other alkene or the polyacrylic polymer of ternary block polymer; With
(b) at least a ethylene/alkyl acrylate copolymer of 1 to 30% weight;
(2) make described composition forming film;
(3) described film is cut into band;
(4) band of hot-drawn and annealing steps (3).
18. the method for claim 17, the amount of the described alkyl acrylate in the wherein said ethylene/alkyl acrylate copolymer are about 5 to about 30% weight.
19. the method for claim 18, the amount of the described alkyl acrylate in the wherein said ethylene/alkyl acrylate copolymer are about 10 to about 25% weight.
20. each method in the claim 17 to 19, wherein said alkyl acrylate is selected from methyl acrylate, ethyl propenoate and butyl acrylate.
21. the method for claim 20, wherein said alkyl acrylate are methyl acrylate.
22. each method in the claim 17 to 21, the amount of wherein said component (b) are 2 to 30% weight.
23. the method for claim 22, the amount of wherein said component (b) are 2 to 20% weight.
24. the method for claim 23, the amount of wherein said component (b) are 2 to 10% weight.
25. each method in the claim 17 to 24, wherein said composition further comprises:
(c) at least a other component that is selected from weighting agent, matting agent, UV stablizer, pigment and other additives of 0.01 to 40% weight.
26. the method for claim 21, the amount of wherein said component (c) are 0.1 to 15% weight.
27. each method in the claim 17 to 26, quenching prepares described method in the cooling bath by described composition is expressed into.
28. each method in the claim 17 to 26, quenching prepares described method on the cooling roller by described composition is expressed into.
29. each method in the claim 17 to 26, described method forms tubular blown film and air quenched preparation of while by described composition is extruded by annular die.
30. each method in the claim 17 to 29, wherein said composition comprises the ethylene/alkyl acrylate copolymer of tubular reactor produced.
31. melt spun fibre by the preparation of compositions that comprises following component:
(a) at least a homopolymer polypropylene that is selected from, the random copolymers of propylene and ethene or segmented copolymer, the ternary atactic copolymer of propylene, ethene and a kind of other alkene or the polyacrylic polymer of ternary block polymer; With
(b) at least a ethylene/alkyl acrylate copolymer of 1 to 15% weight.
32. the fiber of claim 31, the amount of the described alkyl acrylate in the wherein said ethylene/alkyl acrylate copolymer are about 5 to about 30% weight.
33. the fiber of claim 32, the amount of the described alkyl acrylate in the wherein said ethylene/alkyl acrylate copolymer are about 10 to about 25% weight.
34. each fiber in the claim 31 to 33, wherein said alkyl acrylate is selected from methyl acrylate, ethyl propenoate and butyl acrylate.
35. the fiber of claim 34, wherein said alkyl acrylate are methyl acrylate.
36. each fiber in the claim 31 to 35, the amount of wherein said component (b) are 2 to 10% weight.
37. each fiber in the claim 31 to 36, wherein said composition further comprises:
(c) at least a other component that is selected from weighting agent, matting agent, UV stablizer, pigment and other additives of 0.01 to 15% weight.
38. the fiber of claim 37, the amount of wherein said component (c) are 0.1 to 5% weight.
39. each fiber in the claim 31 to 38, wherein said composition comprises the ethylene/alkyl acrylate copolymer of tubular reactor produced.
40. a nonwoven textiles, described nonwoven textiles is made by each melt spun fibre in the claim 31 to 38.
Applications Claiming Priority (4)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| US45308503P | 2003-03-07 | 2003-03-07 | |
| US60/453,085 | 2003-03-07 | ||
| US60/493,260 | 2003-08-07 | ||
| US10/780,385 | 2004-02-17 |
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| Publication Number | Publication Date |
|---|---|
| CN1784459A true CN1784459A (en) | 2006-06-07 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 200480011855 Pending CN1784459A (en) | 2003-03-07 | 2004-03-03 | Alkyl acrylate copolymer modified oriented polypropylene films,tapes,fibers and nonwoven textiles |
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| Country | Link |
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| CN (1) | CN1784459A (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105348709A (en) * | 2015-11-30 | 2016-02-24 | 芜湖成德龙过滤设备有限公司 | Material composition and preparation method of membrane |
| CN109056108A (en) * | 2018-10-19 | 2018-12-21 | 如皋福大工程技术研究院有限公司 | A kind of fiber with antiultraviolet |
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2004
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105348709A (en) * | 2015-11-30 | 2016-02-24 | 芜湖成德龙过滤设备有限公司 | Material composition and preparation method of membrane |
| CN109056108A (en) * | 2018-10-19 | 2018-12-21 | 如皋福大工程技术研究院有限公司 | A kind of fiber with antiultraviolet |
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