CN103924323A - Large-diameter composite monofilament with novel skin-core structure and preparation method and application of composite monofilament - Google Patents
Large-diameter composite monofilament with novel skin-core structure and preparation method and application of composite monofilament Download PDFInfo
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Abstract
The invention discloses a large-diameter composite monofilament with a novel skin-core structure and a preparation method and application of the composite monofilament. A core part of the monofilament is a polyester (PET) resin monofilament which is pre-drafted, and the outer part of the core is uniformly coated by a polytetrafluoroethylene (PTFE) modified polyamide (PA) material; the monofilament has the advantages of the PET and the PTFE modified PA, and the disadvantages of the PET and the PTFE modified PA are avoided, so that the performance complementation of all component materials is fully realized, and the high-performance composite monofilament with the high tensile strength, stability, wear resistance, fatigue resistance and self-cleaning performance is prepared. The invention also discloses the preparation method and the application of the composite monofilament.
Description
Technical field
The present invention relates to a kind of advanced composite material (ACM), refer more particularly to a kind of novel skin-core structure major diameter 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, research and development and the industrialization of country to high-performance fiber and composite supported as key technology area emphasis always.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.
Polyester (PET) by polyalcohol and polyacid polycondensation and polymer general name, a class excellent performance, broad-spectrum engineering plastics, in wider temperature range, there is good physical and mechanical properties, long-term serviceability temperature can reach 120 DEG C, creep resistance, fatigue durability, rub resistance, DIMENSIONAL STABILITY are all better.Polyester (PET) is the high molecular polymer of current output maximum, is widely used in national economy every field.
Polyamide (PA) is commonly called as nylon, be on molecular backbone, contain recurring amide radical group-[NHCO]-thermoplastic resin general name.PA's is various in style, has PA6, PA66, PAll, PAl2, PA46, PA610, PA612, PAl010 etc., is one of most important engineering plastics.Polyamide (PA) has good combination property, comprise mechanical property, heat resistance, high mar proof, chemical proofing and self lubricity, and coefficient of friction is low, has certain anti-flammability; Shortcoming is easy water suction, poor dimensional stability.
Current two component skin-core structure silks are the thermoplastic resin meltings simultaneously by two kinds of different components, become skin-core structure, extrude, make through drawing-off and sizing through specific runner with spinnerets direct combination.This skin-core structure silk is in a lot of product for civilian use extensive uses, but the industry that this technique is made with monofilament particularly major diameter (more than 0.1mm) monofilament cannot reach desirable physical and mechanical properties.Trace it to its cause, because the property differences such as different resin melting temperature, crystallinity and compatibility are very large, after different component compound extruded, common wire drawing production technology cannot realize by identical draft process physics, the mechanical index of the expection of different component resin material; Compatible poor material also easily produces the situation that core-skin separates after stretching.The industry of this explained hereafter skin-core structure composite monofilament, because adapting to different component material specific needs from process aspect, is difficult to reach the object of utilizing different resins characteristic to maximize favourable factors and minimize unfavourable ones.
Summary of the invention
The object of the present invention is to provide a kind of preliminary draft polyester (PET) monofilament and polytetrafluoroethylene (PTFE) modified polyamide (PA) composite, make full use of polyester (PET) and polytetrafluoroethylene (PTFE) modified polyamide (PA) advantage separately, avoid its shortcoming separately, fully realize the performance complement of each component material, make one and there is high-tensile strength, low elongation, dimensionally stable, wear-resisting, endurance and have the high-performance composite monofilament of self-cleaning property.
For achieving the above object, the new technical scheme that the present invention adopts is:
A kind of novel skin-core structure major diameter composite monofilament, it is characterized in that: the core of composite monofilament is divided into polyester (PET) resin monofilament through preliminary draft, the outside of core is coated polytetrafluoroethylene (PTFE) modified polyamide (PA) material evenly.
Wherein, the section shape of the core of composite monofilament is circular, oval or quadrangle.
Wherein, the core of composite monofilament is polyester (PET) resin monofilament through preliminary draft, and draw ratio is 2-6 times.
Wherein, the skin of composite monofilament is that polytetrafluoroethylene (PTFE) superfine powder particle diameter is distributed as 0.0-8.0 micron through the polyamide of polytetrafluoroethylene (PTFE) superfine powder modification (PA) resin, and percentage by weight is the 0-30% of modified resin weight.
Wherein, the sectional area ratio of polytetrafluoroethylene (PTFE) modified polyamide (PA) skin of the sectional area of the polyester of composite monofilament (PET) resin core and monofilament is any fixed proportion between 10 ~ 100%.
Wherein, the polyamide of composite monofilament (PA) resin comprises PA6, PA66, PA11, PA12, PA46, PA610, PA612, PAl010 or its modified resin.
Wherein, polyamide (PA) refers to pure polyamide (PA) resin or modified polyamide (PA) resin.
Wherein, polyamide (PA) resin that polyamide (PA) is modification, the carbon fiber that this modified resin is 0 ~ 10% by pure polyamide (PA) resin interpolation percentage by weight or glass fibre carry out modification as reinforcing material and make.
Wherein, polyamide (PA) resin that polyamide (PA) is modification, this modified resin adds by pure polyamide (PA) resin the titanium dioxide that percentage by weight is 0 ~ 10%, or carbon black or, in calcium carbonate or nano barium sulfate, at least one carries out modification as packing material and makes.
Wherein, the diameter of monofilament is between 0.1-3.0mm.
For addressing the above problem, the present invention discloses a kind of method of manufacturing above-mentioned composite monofilament simultaneously, it is characterized in that, mainly comprises the following steps:
(1) using through preliminary draft, draw ratio be 2-6 polyester (PET) resin monofilament doubly as core, unreel the die head by being contained in screw extruder through weighing apparatus tension force;
(2) polytetrafluoroethylene (PTFE) modified polyamide (PA) section melt extrudes by screw extruder, is evenly distributed on outside the core silk of constant-speed operation, the coated cortex that forms;
(3) through hot water storgae or hot bellows, the compound silk after coated is carried out batching through oven heat sizing after 0-3 drawing-off more doubly, obtain finished product composite monofilament.
The present invention discloses the application of above-mentioned composite monofilament in Separation of Solid and Liquid, filtration and technique transmitting device simultaneously.
The present invention is the openly application of composite monofilament in fabric simultaneously also.
Compared with prior art, the present invention has following beneficial effect:
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 and the DIMENSIONAL STABILITY under high-tension operating condition, the performance that polytetrafluoroethylene (PTFE) modified polyamide (PA) clad is given rub resistance, endurance and the alkali corrosion resistance of compound silk excellence.Compound silk keeps two excellent properties that component all has; Avoided the shortcoming of each component simultaneously.Compound silk of the present invention substitutes the product that polyamide (PA) material is made, and has greatly improved DIMENSIONAL STABILITY and the self-lubricating property of product, has reduced product cost; The product that instead of polyesters (PET) material is made, on the basis of DIMENSIONAL STABILITY that keeps polyester (PET) product, improves anti-wear performance and the alkali corrosion resistance performance of product greatly.Product has excellent self-lubricating and self-cleaning property simultaneously.Compound silk of the present invention has excellent mechanical property and DIMENSIONAL STABILITY, can make the technical fabrics with excellent properties for the harsher industry such as industry transmission, industrial filter of running environment by weaving, and is with a wide range of applications.
Brief description of the drawings
Fig. 1 is the structural representation of composite monofilament of the present invention.
In figure, A is polyester (PET) monofilament sandwich layer, and B is polytetrafluoroethylene (PTFE) modified polyamide (PA) cortex.
Detailed description of the invention
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.
As shown in Figure 1, novel skin-core structure major diameter composite monofilament, the core of composite monofilament is divided into polyester (PET) resin monofilament through preliminary draft, and the outside of core is coated polytetrafluoroethylene (PTFE) modified polyamide (PA) material evenly.Here, core silk is through preliminary draft, draw ratio be 2-6 doubly, there is the mechanical property of expection through drawing-off again after compound, the not drawing-off of cortex after compound or through less drawing-off, has isotropic mechanical property; The cross section of polyester (PET) resin core of monofilament and the Area Ratio of polytetrafluoroethylene (PTFE) modified polyamide (PA) skin of monofilament can regulate by any fixed proportion between 10-100%, as 50%/50% or 60%/40% etc., make the composite construction of different mechanical properties, cortex is closely coated on core silk outside equably; The skin of composite monofilament is that polytetrafluoroethylene (PTFE) superfine powder particle diameter is distributed as 0.0-8.0 micron through the polyamide of polytetrafluoroethylene (PTFE) superfine powder modification (PA) resin, and percentage by weight is the 0-30% of modified resin weight.In the time that polytetrafluoroethylene (PTFE) addition is zero, it is that polyamide (PA) resin, core are the composite monofilament of polyester (PET) resin monofilament through preliminary draft that composite monofilament of the present invention is skin.
Here, the draw ratio of each component material ratio of compound silk and polyester (PET) core silk can be by the adjusting that needs of application, and cortex is closely coated on the core silk outside through preliminary draft equably, and the cross sectional shape of core silk can be circular or oval.
Carry out all raisings greatly of polyamide (PA) TENSILE STRENGTH, anti-wear performance, resistance to elevated temperatures, self-cleaning property and DIMENSIONAL STABILITY after modification through adding ultra-fine polytetrafluoroethylene (PTFE) powder.
Compound silk of the present invention 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 and DIMENSIONAL STABILITY; polytetrafluoroethylene (PTFE) modified polyamide (PA) clad is given alkali corrosion resistance performance and anti-wear performance and the self-cleaning property of compound silk excellence, and compound silk keeps two excellent properties that component all has simultaneously; Avoided the shortcoming of each component simultaneously.
In the above-described embodiments, the diameter of composite monofilament is preferably between 0.1-3.0mm.
As a kind of preferred embodiment, polyamide (PA) is pure polyamide (PA) resin.
As another preferred embodiment, polyamide (PA) resin that polyamide (PA) is modification, the carbon fiber that this modified resin is 0 ~ 10% by pure polyamide (PA) resin interpolation percentage by weight or glass fibre carry out modification as reinforcing material and make.
As another preferred embodiment, polyamide (PA) resin that polyamide (PA) is modification, this modified resin adds by pure polyamide (PA) resin the titanium dioxide that percentage by weight is 0 ~ 10%, or carbon black or, in calcium carbonate or nano barium sulfate, at least one carries out modification as packing material and makes.
The method of manufacturing above-mentioned composite monofilament, mainly comprises the following steps: adopt coated composite spinning method, through melting body, extrude coatedly, not drawing-off or drawing-off and heat treatment, obtain composite monofilament, and concrete steps are as follows:
(1) by through preliminary draft, draw ratio be 2-6 mylar PET monofilament doubly as core, unreel the die head by being contained in screw extruder through weighing apparatus tension force;
(2) polytetrafluoroethylene (PTFE) modified polyamide (PA) section melt extrudes by screw extruder, is evenly distributed on outside the core silk of constant-speed operation, the coated cortex that forms;
(3) composite monofilament after coated batches through oven heat sizing after 0-3 times of drawing-off by hot water storgae, obtains finished product composite monofilament.
As a preferred embodiment, in above-mentioned manufacture method, select external diameter be 0.70mm through preliminary draft, draw ratio be continuous polycondensation (PET) monofilament of 3 times as core, unreel the die head by being contained in screw extruder through weighing apparatus tension force.
The screw extruder that polytetrafluoroethylene (PTFE) modified polyamide-6 (PA6) section is 25:1 by draw ratio melt extrudes.Screw extruder temperature is controlled at: 1 250 DEG C, district, 2 260 DEG C, districts, 3 265 DEG C, districts, 4 270 DEG C, districts, 5 270 DEG C, districts, 270 DEG C of die heads, extrude by die head polytetrafluoroethylene (PTFE) modified polyamide-6 (PA6) of melting, be evenly distributed on outside the core silk of weighing apparatus speed operation, be coated on and on core, form the cortex that 0.19mm is thick, be that external diameter is the composite monofilament of 1.07mm, again through 1.8 times of 95 DEG C of hot water storgae drawing-offs, make heart yearn total stretch ratio reach 5.4 times, after the oven heat sizing of 150 DEG C, batch, obtain 0.80mm external diameter, the skin-core structure finished product composite monofilament that core-skin sectional area ratio is 58%/42%.
Continuous polycondensation (PET) monofilament has passed through the drawing-off (this example is 3 times) of suitable multiple proportions as core silk, unreel speed and can be set as 150-500 m/min according to screw rod capacity, screw extruder measuring pump pressure is obtained the coated thickness (this example is 0.19mm) needing by the speed adjustment of unreeling, compound silk after coated is after cooling water tank is cooling, carry out drawing-off again (this example is 1.8 times) through drawing roller and hot water storgae, make heart yearn reach the total draft multiple (this example is 5.4 times) of expection, be 130-160 DEG C through excess temperature again) baking oven sizing, batch, (this example the is 0.80mm) core/sheath ratio that obtains target wire diameter is according to target combination (this example is 58%/42%), taking polyamide-6 (PA6) of polytetrafluoroethylene (PTFE) modification as skin, the compound silk that polyester (PET) is sandwich layer, by changing Screw Extrusion amount or unreeling speed and die head, can obtain the core-sheath monofilament of other core/sheath ratio (arbitrary proportion between 0-100%) and external diameter (as 0.50-1.5mm), the determining power percentage elongation, elongation at break and dry-hot shrinkage and can adjust on demand by draw ratio and the setting process of adjusting core silk of compound silk.
The present invention discloses the application of above-mentioned composite monofilament in Separation of Solid and Liquid, filtration and technique transmitting device simultaneously.Composite monofilament of the present invention can be made net and filtering medium through weaving, 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.
The present invention is the openly application of composite monofilament in fabric simultaneously also.Compound silk product of the present invention can be separately or is woven into the fabric of various texture structures 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 product that compound silk instead of polyesters of the present invention (PET) material is made, in keeping mechanical property, improves alkali corrosion resistance performance and the anti-wear performance of product with lower cost greatly; The product that replaces polyamide (PA) material to make, in keeping excellent alkali corrosion resistance performance and anti-wear performance, has improved mechanical property and the DIMENSIONAL STABILITY of product greatly, temperature that can Nai Genggao; The product that replaces polyester (PET) and polyamide (PA) monofilament to make has also improved impact resistance and the resistance to fold performance of product, and has common monofilament product incomparable self-lubricating property and self-cleaning property.
The above; only for preferably detailed description of the invention of the present invention, 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 (13)
1. a novel skin-core structure major diameter composite monofilament, it is characterized in that: the core of composite monofilament is divided into polyester (PET) resin through preliminary draft, the outside of core is polyamide (PA) resin material of coated polytetrafluoroethylene (PTFE) modification evenly.
2. composite monofilament according to claim 1, is characterized in that, the section shape of the core of composite monofilament is circular, oval or quadrangle.
3. composite monofilament according to claim 1, is characterized in that, the core of composite monofilament is polyester (PET) resin monofilament through preliminary draft, and draw ratio is 2-6 times.
4. composite monofilament according to claim 1, it is characterized in that, the skin of composite monofilament is through the polyamide of polytetrafluoroethylene (PTFE) superfine powder modification (PA) resin, polytetrafluoroethylene (PTFE) superfine powder particle diameter is distributed as 0.0-8.0 micron, and percentage by weight is the 0-30% of modified resin weight.
5. composite monofilament according to claim 1 and 2, it is characterized in that, the section of polyester (PET) resin core of composite monofilament and the area of section ratio of polytetrafluoroethylene (PTFE) modified polyamide (PA) skin of monofilament are any fixed proportions between 10 ~ 100%.
6. composite monofilament according to claim 1, is characterized in that, polyamide (PA) refers to pure polyamide (PA) resin or modified polyamide (PA) resin.
7. composite monofilament according to claim 1 and 2, is characterized in that, polyamide (PA) resin of composite monofilament comprises PA6, PA66, PA11, PA12, PA46, PA610, PA612, PAl010 or its modified resin.
8. composite monofilament according to claim 1, it is characterized in that, polyamide (PA) resin that polyamide (PA) is modification, the carbon fiber that this modified resin is 0 ~ 10% by pure polyamide (PA) resin interpolation percentage by weight or glass fibre carry out modification as reinforcing material and make.
9. composite monofilament according to claim 1, it is characterized in that, polyamide (PA) resin that polyamide (PA) is modification, this modified resin adds by pure polyamide (PA) resin the titanium dioxide that percentage by weight is 0 ~ 10%, or carbon black or, in calcium carbonate or nano barium sulfate, at least one carries out modification as packing material and makes.
10. composite monofilament according to claim 1, is characterized in that, the diameter of composite monofilament is between 0.1-3.0mm.
The method of 11. 1 kinds of manufactures composite monofilament as described in any one in claim 1 ~ 10, is characterized in that, mainly comprises the following steps:
(1), using the mylar PET monofilament through preliminary draft as core, unreel the die head by being contained in screw extruder through weighing apparatus tension force;
(2) polytetrafluoroethylene (PTFE) modified polyamide (PA) section melt extrudes by screw extruder, is evenly distributed on outside the core silk of constant-speed operation, the coated cortex that forms;
(3) through hot water storgae or hot bellows, the compound silk after coated is carried out batching through oven heat sizing after 0-3 drawing-off more doubly, obtain finished product composite monofilament.
The application of major diameter composite monofilament described in 12. claims 1 ~ 10 in Separation of Solid and Liquid, filtration and technique transmitting device.
The application of major diameter composite monofilament described in 13. claims 1 ~ 10 in fabric.
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| CN104195671A (en) * | 2014-09-15 | 2014-12-10 | 马海燕 | Large-diameter PA6-PET (Polyamide-6-Polyethylene Terephthalate) skin-core type composite monofilament and production method thereof |
| CN104711746A (en) * | 2014-08-28 | 2015-06-17 | 厦门厦迪亚斯环保过滤技术有限公司 | Filter screen applied to phosphoric acid industry and weaving method thereof |
| CN108914227A (en) * | 2018-07-26 | 2018-11-30 | 湖北省宇涛特种纤维股份有限公司 | Preparation method, die head component and the fabric of extrusion coated formula core-skin fibre long filament |
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| CN104178829A (en) * | 2014-07-30 | 2014-12-03 | 厦门怡龙谷新材料科技有限公司 | Composite large-diameter monofilament with variable cross section and skin core structure as well as manufacturing method and application thereof |
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| CN110528117A (en) * | 2018-05-24 | 2019-12-03 | 绍兴逸客丝新材料科技有限公司 | A kind of elastomeric overmold line |
| CN110528093A (en) * | 2018-05-24 | 2019-12-03 | 绍兴逸客丝新材料科技有限公司 | A method of producing elastomeric overmold line |
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| CN108914227A (en) * | 2018-07-26 | 2018-11-30 | 湖北省宇涛特种纤维股份有限公司 | Preparation method, die head component and the fabric of extrusion coated formula core-skin fibre long filament |
| CN109695069A (en) * | 2018-12-26 | 2019-04-30 | 无锡金通高纤股份有限公司 | A kind of high strength flexible elastic composite monofilament and preparation method thereof |
| CN110512294B (en) * | 2019-09-24 | 2021-03-30 | 厦门厦迪亚斯环保过滤技术有限公司 | Sheath-core type composite monofilament, production method and application thereof |
| CN110512294A (en) * | 2019-09-24 | 2019-11-29 | 厦门厦迪亚斯环保过滤技术有限公司 | A kind of core-skin type composite monofilament, production method and its application |
| CN110820170B (en) * | 2019-11-08 | 2021-06-15 | 厦门长塑实业有限公司 | Biaxially oriented nylon porous fiber membrane and preparation method thereof |
| CN110820170A (en) * | 2019-11-08 | 2020-02-21 | 厦门长塑实业有限公司 | Nylon porous fiber membrane and preparation method thereof, and biaxially oriented nylon porous fiber membrane and preparation method thereof |
| CN112981589A (en) * | 2021-02-02 | 2021-06-18 | 福建永荣锦江股份有限公司 | Chinlon 6 filament and preparation method thereof |
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Application publication date: 20140716 |