CN104178829A - Composite large-diameter monofilament with variable cross section and skin core structure as well as manufacturing method and application thereof - Google Patents
Composite large-diameter monofilament with variable cross section and skin core structure as well as manufacturing method and application thereof Download PDFInfo
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- CN104178829A CN104178829A CN201410367298.XA CN201410367298A CN104178829A CN 104178829 A CN104178829 A CN 104178829A CN 201410367298 A CN201410367298 A CN 201410367298A CN 104178829 A CN104178829 A CN 104178829A
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Abstract
The invention discloses a composite large-diameter monofilament with a variable cross section and a skin core structure. A core of the composite monofilament adopts a PET (polyethylene terephthalate) resin monofilament subjected to preliminary draft and is uniformly coated with a thermoplastic resin material skin layer, and the cross section of the monofilament is periodically changed in the length direction. The composite monofilament with the variable cross section and the skin core structure sufficiently uses advantages of component materials, that is, by means of the high tensile strength of PET, the composite monofilament has extremely high tensile strength and is endowed with basic mechanical performance, by means of the thermoplastic resin coating layer, the composite monofilament is endowed with required chemical corrosion resistance, hydrolysis resistance or other specific performance of resin, and meanwhile, the cross section in the length direction of the monofilament is periodically changed, so that the surface area of each monofilament is greatly increased, and an extra channel is provided for a fluid by aid of a regular concave-convex surface. The invention discloses a manufacturing method and an application of the monofilament simultaneously.
Description
Technical field
The present invention relates to a kind of advanced composite material (ACM), refer more particularly to a kind of varied cross section major diameter skin-core structure composite monofilament, manufacture method and application thereof.
Background technology
New material and composite and be one of key area of China's science and technology development planning in the application of industry and people's lives always. country supports as key technology area emphasis the research and development of high-performance fiber and composite and industrialization.Relevant new material and composite are to promoting upgrading and the energy-saving and emission-reduction of the field products such as the energy, traffic, industry, the people's livelihood significant.
Thermoplastic resin is as polyester (PET), polypropylene (PP), polyamide (PA), modified poly ester (PET), polyphenylene sulfide (PPS), polyether-ether-ketone (PEEK), Meltability polytetrafluorethyletubular (PFA), Kynoar (PVDF), fluorinated ethylene propylene copolymer (FEP), ethylene tetrafluoroethylene copolymer (ETFE) and modified resin thereof etc. respectively have excellent physics, mechanics and chemical property, can be by melt extruding, drawing-off, after sizing, make circular cross-section or the quadrangular section continuous monofilament with different wire diameters, be woven into the filtering medium of various different designs, be widely used in Separation of Solid and Liquid, in the technological processes such as filtration and technique transmission.
With typical circular cross section or quadrangular section continuous monofilament, by the common definition of fiber, can be considered two-dimensional structure, the two-dimensional cross sectional of monofilament has determined the structure of monofilament, and (infinitely) that length direction is same cross-sectional extended; The guipure being made into or filtering medium, can make various fabric construction and mesh distributes by Fabric Design, through weaving and the technique such as sizing, calendering is controlled, with it, reach fabric and possess that the particle that adapts to different work condition environments is held back, breathed freely, permeable and regenerability.Monofilament is wherein as the constituent of fabric construction, interweave and formed the pore structure of guipure thereby made guipure have specific intensity, obstruction, the performance such as ventilative, permeable, but monofilament itself is also the reason that produces fluid resistance.When keeping other performances of guipure, (comprising specific filament diameter), increase flow, had great importance to Separation of Solid and Liquid, filtration if can reduce the fluid resistance of monofilament itself.Current guipure is used two-dimensional circular or quadrangular section continuous monofilament, and mainly the combination by the monofilament by different wire diameters improves above-mentioned functions.The one-component that tradition monofilament production technology is produced or two component two-dimensional structure monofilament are to produce through the happy and harmonious draft process of extruding, and the restriction of technique itself can not be made monofilament the cyclically-varying cross section structure of length direction.
Summary of the invention
For solving the problems of the technologies described above, the invention provides a kind of varied cross section skin-core structure composite monofilament, its manufacture method and application thereof, the cortex of composite monofilament forms at least a certain length direction section through mold pressing and has waveform gabarit, thereby formation and modification cross section skin-core structure, greatly increased the surface area of monofilament, than conventional two-dimensional cross section monofilament product, greatly increase fluid passage, in the identical situation of other conditions, increased considerably ventilative, the water permeability of product.
For solving the problems of the technologies described above, the present invention by the following technical solutions:
A kind of varied cross section major diameter skin-core structure composite monofilament, it is characterized in that, the core of composite monofilament is polyester (PET) resin monofilament through preliminary draft, the outside even coating thermoplastic resin material cortex of core, and the sectional area of monofilament is cyclically-varying along its length.
Wherein, described cyclically-varying is specially: along filament length direction, have at least a section gabarit to be the waveform that continuous regular changes.
Wherein, the wave height along the waviness of the surface of the section of filament length direction changes between the 5-90% of skin thickness.
Wherein, the core radial section of composite monofilament in circle, oval or quadrangle any, the external diameter of monofilament is between 0.1-3.0mm.
Wherein, the core of composite monofilament is polyester (PET) resin monofilament through preliminary draft, and draw ratio is 2-6 times.
Wherein, the thermoplastic resin of cortex is pure resin or modified resin.
Wherein, described pure resin comprises polypropylene (PP), polyamide (PA), modified poly ester (PET), polyphenylene sulfide (PPS), polyether-ether-ketone (PEEK), Meltability polytetrafluorethyletubular (PFA), Kynoar (PVDF), fluorinated ethylene propylene copolymer (FEP), ethylene tetrafluoroethylene copolymer (ETFE).
Wherein, described modified resin is the resin after any modification in polypropylene (PP), polyamide (PA), modified poly ester (PET), polyphenylene sulfide (PPS), polyether-ether-ketone (PEEK), Meltability polytetrafluorethyletubular (PFA), Kynoar (PVDF), fluorinated ethylene propylene copolymer (FEP), the pure resin of ethylene tetrafluoroethylene copolymer (ETFE).
Wherein, described modified resin is that pure resin makes by being added into following material modification:
Carbon fiber or glass fibre;
Superfine powder of polytetrafluoroethylene, titanium dioxide, carbon black powder, Paris white, nano barium sulfate powder.
The present invention discloses a kind of method of manufacturing above-mentioned varied cross section skin-core structure composite monofilament simultaneously, it is characterized in that, mainly comprises the following steps:
(1), using the mylar PET monofilament through preliminary draft as core, through weighing apparatus tension force, unreel by being contained in the die head of screw extruder;
(2) thermoplastic resin melt extrudes by screw extruder, is evenly distributed on outside the core silk of constant-speed operation, the coated cortex that forms;
(3) after coated, before cortex solidifies not yet completely, by monofilament surface die module, surperficial cortex hoop direction is extruded to regular groove continuously, make along monofilament sectional area cyclically-varying radially;
(4) after bosh, through hot water storgae or hot bellows, the compound silk after coated is carried out to 1-3 drawing-off more doubly again and batch by oven heat sizing, obtain finished product composite monofilament.
Wherein, described in step (2), thermoplastic resin comprises pure resin and modified resin.
The present invention discloses the application in equipment for separating liquid from solid, filter and technique transmitting device of fabric that above-mentioned varied cross section skin-core structure composite monofilament makes simultaneously.
Compared with prior art, the present invention has following beneficial effect:
Varied cross section skin-core structure compound silk takes full advantage of the advantage of each component material, the high-tensile strength that is polyester (PET) makes compound silk have higher TENSILE STRENGTH, for monofilament provides basic mechanical performance, other thermoplastic resin clad is given the needed resistance to chemical corrosion of compound silk, resistant to hydrolysis performance or the distinctive performance of other these resins, cortex has at length direction the cross section that rule changes simultaneously, the surface area of every monofilament is increased greatly, and the convex-concave surface of rule provides additional channels for fluid.Composite monofilament keeps two excellent properties that component all has, and has avoided the shortcoming of each component simultaneously; The product that skin-core structure compound silk instead of polyesters (PET) material is made, with lower cost when keeping mechanical property and greatly improve resistance to chemical attack and anti-hydrolytic performance or the not available performance of other PET of product; Varied cross section skin-core structure composite monofilament product has increased fluid passage greatly than conventional two-dimensional cross section monofilament product, increases considerably ventilative, the water permeability of product in the identical situation of other conditions; Further, the horizontal flow-guiding channel of varied cross section skin-core structure composite monofilament is consistent with fluid flow direction, particularly substitute all or part of common monofilament as parallel, not only can greatly reduce fluid resistance, also make fabric keep automatically cleaning and better renewable performance, significantly delay the blocked cycle in product use, thereby greatly increase operating efficiency and the service life of product.
Accompanying drawing explanation
Figure 1A is varied cross section skin-core structure composite monofilament the first example structure schematic diagram of the present invention;
Figure 1B is A-A cross-sectional view in Fig. 1;
Fig. 1 C is the changes of section schematic diagram of the first embodiment in Figure 1A;
Fig. 2 A is varied cross section skin-core structure composite monofilament the second example structure schematic diagram of the present invention;
Fig. 2 B is B-B cross-sectional view in Fig. 2 A;
Fig. 2 C is the second embodiment changes of section schematic diagram in Fig. 2 A;
Fig. 3 A is varied cross section skin-core structure composite monofilament the 3rd example structure schematic diagram of the present invention;
Fig. 3 B is C-C cross-sectional view in 3A;
Fig. 3 C is the 3rd embodiment changes of section schematic diagram in Fig. 3 A.
Main description of reference numerals
A preliminary draft polyester (PET) monofilament sandwich layer
B thermoplastic resin material cortex
The fluid course that C increases.
The specific embodiment
By describing technology contents of the present invention, structural feature in detail, being realized object and effect, below in conjunction with embodiment and coordinate accompanying drawing to be explained in detail.
Varied cross section major diameter skin-core structure composite monofilament, the core of composite monofilament is polyester (PET) resin monofilament through preliminary draft, draw ratio is 2-6 times.The outside even coating thermoplastic resin material cortex of core, the radial section of monofilament amasss and is cyclically-varying.
The high-tensile strength of polyester (PET) resin monofilament makes composite monofilament have higher TENSILE STRENGTH, for monofilament provides basic mechanical performance, outside thermoplastic resin clad is given the needed resistance to chemical corrosion of compound silk, resistant to hydrolysis performance or the distinctive performance of other these resins, cortex has at length direction the cross section that rule changes simultaneously, the surface area of every monofilament is increased greatly, and the convex-concave surface of rule provides additional channels for fluid.Varied cross section skin-core structure composite monofilament product has increased fluid passage greatly than conventional two-dimensional cross section monofilament product, increases considerably ventilative, the water permeability of product in the identical situation of other conditions.
With reference to Figure 1A ~ Fig. 3 B, the long-pending regular several modes that change of radial section for composite monofilament, comprise: along at least certain length direction of monofilament, its section is the waveform that continuous regular changes, or zigzag, or waveform and alternately appearance of sawtooth, here the sectional area changing is long-pending in order to increase monofilament surface, thereby for fluid provides additional channels, concrete cross sectional shape just for example, is not limited in this.
Section along filament length direction, its peak or minimum point height change between the 5-90% of skin thickness, can greatly reduce fluid resistance, also make the fabric that this monofilament makes keep automatically cleaning and better renewable performance, significantly delay the blocked cycle in product use, thereby greatly increase operating efficiency and the service life of product.
It is outside that thermoplastic resin material cortex is closely coated on core silk equably, determines whether on demand drawing-off and drawing-off amount.General, the polyester of composite monofilament (PET) core filament drafting ratio can be set arbitrarily within the scope of 2-6 times.The section of core silk in circle, oval or quadrangle any.The diameter of monofilament is preferably at 0.1-3.0mm.
In the present embodiment, the cortex of monofilament is thermoplastic resin, comprise pure resin or modified resin, pure resin can be polypropylene (PP), polyamide (PA), modified poly ester (PET), polyphenylene sulfide (PPS), polyether-ether-ketone (PEEK), Meltability polytetrafluorethyletubular (PFA), Kynoar (PVDF), fluorinated ethylene propylene copolymer (FEP), ethylene tetrafluoroethylene copolymer (ETFE) etc., is not limited to this; Modified resin can be that above-mentioned pure resin carries out the resin after modification through adding reinforcing material or additive, and pure resin or modified resin are coated on the above-mentioned core skin with different cross section equably.
Here, the additive pure resin modified being used comprises but is not limited to:
Carbon fiber or glass fibre;
Superfine powder of polytetrafluoroethylene, titanium dioxide, carbon black, calcium carbonate, nano barium sulfate.
The present invention discloses a kind of method of manufacturing above-mentioned composite monofilament simultaneously, mainly comprises the following steps:
(1) using through preliminary draft, draw ratio be 2-6 mylar PET monofilament doubly as core, through weighing apparatus tension force, unreel by being contained in the die head of screw extruder;
(2) thermoplastic resin (comprising pure resin and modified resin) melt extrudes by screw extruder, is evenly distributed on outside the core silk of constant-speed operation, the coated cortex that forms;
(3) after coated, before cortex solidifies not yet completely, by monofilament surface die module, surperficial cortex hoop direction is extruded to regular groove continuously, make the sectional area cyclically-varying along filament length direction;
(4) through bosh, and through hot water storgae or hot bellows, the compound silk after coated is carried out to 1-3 drawing-off more doubly again, by oven heat sizing, batch, obtain finished product varied cross section skin-core structure composite monofilament, here 1 times refers to and does not carry out drawing-off, 3 times of 3 times of length while referring to that the length after drawing-off is not drawing-off.
In above-mentioned steps (1), select specification be 0.30mm, draw ratio be 2-6 continuous polycondensation (PET) monofilament through preliminary draft doubly as core, the tension force that weighed unreels with specific speed by coating mould assembly specific standard, that be contained in special screw extruder.
As a kind of concrete embodiment, screw extruder is passed through in thermoplastic resin (comprising pure resin or modified resin) section, each district of screw extruder and die assembly temperature are pressed the Characteristics Control of this thermoplastic resin at 240-330 ℃, the thermoplastic resin of melting is extruded the cortex that forms 0.2mm thickness by being evenly coated on the core silk of constant-speed operation outward by die head, by one group of mold pressing assembly, cortex is extruded to the groove of the 0.05mm degree of depth again, monofilament surface length direction forms wave height and is about 0.05mm waved surface structure, after hot water cooling, the drafting multiple drawing-off of setting through pressing polyester pre-draft multiple by 95 ℃ of boilers, entered again oven heat drawing-off to the total draft multiple (5.0-5.8 doubly) of needed polyester (PET) core silk, cooling after shaping by shaping baking oven, batch.
The speed that unreels of core silk, screw extruder measuring pump pressure and die head specification and specific draw ratio combination form specific technological parameter, obtain fiber number and be 0.30-0.70mm or thicker take thermoplastic resin as cortex, polyester (PET) is sandwich layer, length direction has the long-pending skin-core structure composite monofilament of varied cross section of waved surface.
The varied cross section skin-core structure composite monofilament of technique manufacture of the present invention has excellent mechanical property and stability, in the low cost that highly keeps and utilized polyester (PET), on the basis of the advantage of high strength and DIMENSIONAL STABILITY, other performance advantages of other thermoplastic resin of process makes full use, and by making monofilament surface there is waveform configuration at length direction, thereby greatly increase the surface area of monofilament and the horizontal micropore runner that ordinary two dimensional monofilament does not have, the product obtaining has polyester (PET) monofilament that current drawing process produces or skin-core structure silk cannot implementation trade-off performance at present,
The present invention discloses the application in Separation of Solid and Liquid, filtration and technique transmitting device of fabric that above-mentioned varied cross section skin-core structure composite monofilament makes simultaneously.Composite monofilament of the present invention can be through weaving fabrics such as making net and filtering medium, be used in the Separation of Solid and Liquid such as horizontal vacuum filter, disk filter, belt filter press, rotary drum vacuum filter, filter press, leaf filter and Separation of Solid and Liquid, filtration and technique transmitting device as filtering medium, also can transmission and moulding process wear-resisting for needs, self-cleaning performance comprise in the production equipments such as plasterboard, medium density fibre board (MDF), high density fiberboard; Compound silk product of the present invention can be woven into the fabric of various texture structures separately or with other monofilament, multifilament, short fiber or its combination as warp and/or parallel; Can make spiral net for as paper grade (stock) net and filtering medium; Also can be through weaving the base cloth as nonwoven fabric.The technical fabrics that the composite monofilament of use explained hereafter of the present invention is weaved system is for the harsher solid-liquid separation process such as industrial filter of running environment and technique transmission equipment, to enhance productivity, reduce maintenance cost and production cost, extend product service life, reduce labor intensity, be with a wide range of applications.
The above; be only the present invention's specific embodiment preferably, but protection scope of the present invention is not limited to this, is anyly familiar with in technical scope that those skilled in the art disclose in the present invention; the variation that can expect easily or replacement, within all should being encompassed in protection scope of the present invention.Therefore, protection scope of the present invention should be as the criterion with the protection domain of claim.
Claims (10)
1. a varied cross section major diameter skin-core structure composite monofilament, it is characterized in that, the core of composite monofilament is polyester (PET) resin monofilament through preliminary draft, the outside even coating thermoplastic resin material cortex of core, and the sectional area of monofilament is cyclically-varying along its length.
2. varied cross section major diameter skin-core structure composite monofilament according to claim 1, is characterized in that, described cyclically-varying is specially: along filament length direction, have at least a section gabarit to be the waveform that continuous regular changes.
3. varied cross section major diameter skin-core structure composite monofilament according to claim 1 and 2, is characterized in that, along the wave height of the waviness of the surface of the section of filament length direction, between the 5-90% of skin thickness, changes.
4. according to the made varied cross section skin-core structure composite monofilament of claim 1 or 2, it is characterized in that, the core radial section of composite monofilament in circle, oval or quadrangle any, the external diameter of monofilament is between 0.1-3.0mm.
5. according to the made varied cross section skin-core structure composite monofilament of claim 1 or 2, it is characterized in that, the core of composite monofilament is polyester (PET) resin monofilament through preliminary draft, and draw ratio is 2-6 times.
6. varied cross section skin-core structure composite monofilament according to claim 1, is characterized in that, the thermoplastic resin of cortex is pure resin or modified resin.
7. varied cross section skin-core structure composite monofilament according to claim 6, it is characterized in that, described pure resin comprises polypropylene (PP), polyamide (PA), modified poly ester (PET), polyphenylene sulfide (PPS), polyether-ether-ketone (PEEK), Meltability polytetrafluorethyletubular (PFA), Kynoar (PVDF), fluorinated ethylene propylene copolymer (FEP), ethylene tetrafluoroethylene copolymer (ETFE); Modified resin refers to that above-mentioned pure resin adds the PTFE of 1-20%, the modified resin that glass fibre obtains.
8. the method for manufacture varied cross section skin-core structure composite monofilament as described in claim 1 ~ 7 any one, it is characterized in that, mainly comprise the following steps: (1), using the mylar PET monofilament through preliminary draft as core, unreels by being contained in the die head of screw extruder through weighing apparatus tension force; (2) thermoplastic resin melt extrudes by screw extruder, is evenly distributed on outside the core silk of constant-speed operation, the coated cortex that forms; (3) after coated, before cortex solidifies not yet completely, by monofilament surface die module, surperficial cortex hoop direction is extruded to regular groove continuously, make along monofilament sectional area cyclically-varying radially; (4) after bosh, through hot water storgae or hot bellows, the compound silk after coated is carried out to 1-3 drawing-off more doubly again and batch by oven heat sizing, obtain finished product composite monofilament.
9. the manufacture method of varied cross section major diameter skin-core structure composite monofilament according to claim 8, is characterized in that, described in step (2), thermoplastic resin comprises pure resin and modified resin.
10. the application of the fabric that in claim 1 ~ 7, the varied cross section skin-core structure composite monofilament described in any one is made in Separation of Solid and Liquid, filtration and technique transmitting device.
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| CN104562731A (en) * | 2015-01-08 | 2015-04-29 | 江阴和创弹性体新材料科技有限公司 | Three-dimensional mesh structure with high elasticity |
| CN105063779A (en) * | 2015-08-04 | 2015-11-18 | 无锡金通化纤有限公司 | Chemical resisting composite monofilament and preparation method thereof |
| CN105220257A (en) * | 2015-09-14 | 2016-01-06 | 厦门厦迪亚斯环保过滤技术有限公司 | Brilliant and the modification monofilament of high-wearing feature of resistive connection and the preparation method of industrial filter screen |
| CN108754645A (en) * | 2018-07-24 | 2018-11-06 | 南通天龙化纤有限公司 | A kind of production technology of garment accessories polyester staple fiber |
| CN110158217A (en) * | 2019-06-12 | 2019-08-23 | 浙江三星特种纺织股份有限公司 | A kind of variation of controllable diameter and color ratio variation cladding wire and its production method |
| CN112481736A (en) * | 2020-12-28 | 2021-03-12 | 南通新帝克单丝科技股份有限公司 | Polyvinylidene fluoride polyester composite monofilament and preparation method thereof |
| CN113737313A (en) * | 2021-10-13 | 2021-12-03 | 无锡金通高纤股份有限公司 | Peek/pps sheath-core composite monofilament, preparation method and application |
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| CN113737313A (en) * | 2021-10-13 | 2021-12-03 | 无锡金通高纤股份有限公司 | Peek/pps sheath-core composite monofilament, preparation method and application |
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Application publication date: 20141203 |