CN101309959A - Long fiber thermoplastic process for conductive composites and composites formed thereby - Google Patents

Long fiber thermoplastic process for conductive composites and composites formed thereby Download PDF

Info

Publication number
CN101309959A
CN101309959A CNA200680042734XA CN200680042734A CN101309959A CN 101309959 A CN101309959 A CN 101309959A CN A200680042734X A CNA200680042734X A CN A200680042734XA CN 200680042734 A CN200680042734 A CN 200680042734A CN 101309959 A CN101309959 A CN 101309959A
Authority
CN
China
Prior art keywords
fiber
fibre
conductive fibers
shielding
electromagnetic shielding
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Pending
Application number
CNA200680042734XA
Other languages
Chinese (zh)
Inventor
T·P·黑格
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Owens Corning Intellectual Capital LLC
Original Assignee
OCV Intellectual Capital LLC
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by OCV Intellectual Capital LLC filed Critical OCV Intellectual Capital LLC
Publication of CN101309959A publication Critical patent/CN101309959A/en
Pending legal-status Critical Current

Links

Images

Classifications

    • C—CHEMISTRY; METALLURGY
    • C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
    • C08L—COMPOSITIONS OF MACROMOLECULAR COMPOUNDS
    • C08L55/00—Compositions of homopolymers or copolymers, obtained by polymerisation reactions only involving carbon-to-carbon unsaturated bonds, not provided for in groups C08L23/00 - C08L53/00
    • C08L55/02—ABS [Acrylonitrile-Butadiene-Styrene] polymers
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
    • B29C45/00—Injection moulding, i.e. forcing the required volume of moulding material through a nozzle into a closed mould; Apparatus therefor
    • B29C45/0005—Injection moulding, i.e. forcing the required volume of moulding material through a nozzle into a closed mould; Apparatus therefor using fibre reinforcements
    • C—CHEMISTRY; METALLURGY
    • C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
    • C08L—COMPOSITIONS OF MACROMOLECULAR COMPOUNDS
    • C08L67/00—Compositions of polyesters obtained by reactions forming a carboxylic ester link in the main chain; Compositions of derivatives of such polymers
    • C08L67/02—Polyesters derived from dicarboxylic acids and dihydroxy compounds
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01B—CABLES; CONDUCTORS; INSULATORS; SELECTION OF MATERIALS FOR THEIR CONDUCTIVE, INSULATING OR DIELECTRIC PROPERTIES
    • H01B1/00—Conductors or conductive bodies characterised by the conductive materials; Selection of materials as conductors
    • H01B1/20—Conductive material dispersed in non-conductive organic material
    • H01B1/22—Conductive material dispersed in non-conductive organic material the conductive material comprising metals or alloys
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01B—CABLES; CONDUCTORS; INSULATORS; SELECTION OF MATERIALS FOR THEIR CONDUCTIVE, INSULATING OR DIELECTRIC PROPERTIES
    • H01B1/00—Conductors or conductive bodies characterised by the conductive materials; Selection of materials as conductors
    • H01B1/20—Conductive material dispersed in non-conductive organic material
    • H01B1/24—Conductive material dispersed in non-conductive organic material the conductive material comprising carbon-silicon compounds, carbon or silicon
    • H—ELECTRICITY
    • H05—ELECTRIC TECHNIQUES NOT OTHERWISE PROVIDED FOR
    • H05K—PRINTED CIRCUITS; CASINGS OR CONSTRUCTIONAL DETAILS OF ELECTRIC APPARATUS; MANUFACTURE OF ASSEMBLAGES OF ELECTRICAL COMPONENTS
    • H05K9/00—Screening of apparatus or components against electric or magnetic fields
    • H05K9/0073—Shielding materials
    • H05K9/0081—Electromagnetic shielding materials, e.g. EMI, RFI shielding
    • H05K9/009—Electromagnetic shielding materials, e.g. EMI, RFI shielding comprising electro-conductive fibres, e.g. metal fibres, carbon fibres, metallised textile fibres, electro-conductive mesh, woven, non-woven mat, fleece, cross-linked
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
    • B29C45/00—Injection moulding, i.e. forcing the required volume of moulding material through a nozzle into a closed mould; Apparatus therefor
    • B29C45/17—Component parts, details or accessories; Auxiliary operations
    • B29C45/46—Means for plasticising or homogenising the moulding material or forcing it into the mould
    • B29C2045/466—Means for plasticising or homogenising the moulding material or forcing it into the mould supplying the injection unit directly by a compounder
    • C—CHEMISTRY; METALLURGY
    • C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
    • C08K—Use of inorganic or non-macromolecular organic substances as compounding ingredients
    • C08K9/00—Use of pretreated ingredients
    • C08K9/02—Ingredients treated with inorganic substances
    • C—CHEMISTRY; METALLURGY
    • C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
    • C08L—COMPOSITIONS OF MACROMOLECULAR COMPOUNDS
    • C08L2201/00—Properties
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
    • Y10T—TECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION
    • Y10T428/00—Stock material or miscellaneous articles
    • Y10T428/249921—Web or sheet containing structurally defined element or component
    • Y10T428/249924—Noninterengaged fiber-containing paper-free web or sheet which is not of specified porosity

Abstract

The present invention relates to a polymer article that includes electrically conductive fibers to provide electrical electromagnetic interference (EMI) shielding and their method of manufacture. The invention includes a method for forming shielding materials by impregnating conductive fibers in a polymer material via direct injection of the conductive fibers into the extrusion process. The invention also includes EMI shielding polymers and products that are radio-frequency and electromagnetically shielded by parts formed of the shielding polymer.

Description

Be used for the long fiber thermoplastic process of conductive composite and by its matrix material that forms
Technical field
The present invention relates to comprise the polymer product of electro-conductive fiber to provide electromagnetic interference (EMI) to shield, and manufacture method.More particularly, the present invention relates to by by direct injection conductive fibers to expressing technique, in polymer materials, flood conductive fibers, form the method for shielding material.EMI shielded polymer of the present invention can form wide in range various products, for example radio frequency and electromagnetic shielded plastic articles.
Background technology
Along with electronics, for example the use of computer and other digital devices increases, and highly is concerned about and electromagnetic radiation, especially radar wave, the microwave harm relevant with the electromagnetic radiation that circuit is produced.Because electronic industry continues to increase at a quick pace, therefore still need to produce the improved electromagnetic shielding material that can be incorporated in the electronic product.
Developed many electro-conductive materials to make composite product, for example plastics make it have the feature that electromagnetic shielding, electrostatic dissipation and other electrical properties improve.Compare with the metallic substance of routine, especially convenient by the plastics that electro-conductive material forms, this is because their lightweights, the easy production of use injection molding technology and cost are low.Typically, these electro-conductive materials are matrix materials of plastics and conductive powder and chopped strand.
When mixing conductive powder and chopped strand in composite product the time, used various technology.Fig. 1 shows conventional thermoplasticity commonly used and extrudes the compounding technology, and thermoplastic resin 112 is fed in the compounding machine 110.Heating resin 112 is fed into fiber or powder (unification is expressed as 114) in the compounding machine 110 then to melt temperature, mixes in conductive powder or chopped strand.The fibre blend 118 of extrusion resin/fragmentation at water-bath 120 internal cooling, is cut into pellet 124 by line material cutter 122 then.Then pellet 124 typically is fed in the puddle of injection moulding machine (not shown).
Pellet in the technology shown in Figure 1 comprises that the shearing force that is applied because of the cutting action of screw rod 116 and this resin of fusion causes broken fiber.Fiber fragmentation in the compounding technological process is so that the gained composite product contains only short relatively broken fiber.Staple fibre is given the capability of electromagnetic shielding that matrix material reduces, and this is also to reduce by the ability of this composite product conduct electricity because they form the conductive fibers network.Perhaps, when conductive powder is mixed with the molten thermoplastic plastics, typically need to use very a large amount of conductive powder.A large amount of like this powder can cause the physical strength of powder bad dispersibility or the finished product to reduce.Therefore, load or packing density that the composite product that adopts broken fiber and powder to form is had relatively high expectations, this will cause the physical strength decline and the material cost of formed composite product higher.
Title applies the applying glue material on the Ni-coated fibres for the open US 2002/0108699 (introducing for reference in full at this) of U. S. application of " Method for Forming Electrically Conductive Fibersand Fiber Pellets (forming the method for electro-conductive fiber and fiber pellet) " discloses by (1), makes fiber compatible with the thermoplastic matrix material; (2) heated drying sizing agent; (3) with thermoplastic matrix material wire enamel application fiber; (4) this thermoplastic matrix material of quencher; (5) drying coated fiber; (6) short cutting or the granulation coated fibres; (7) this pellet is fed in the injection moulding machine; (8) this pellet of fusion and articles injection-moulded and electromagnetic wave shielding pellet that form.
Each step of the fiber process of granulation makes and demonstrates material unaccounted-for (MUF) and poor efficiency cycling time and the defective probability is provided.There are several extra shortcomings.Wire enamel coating process process neutralization once more in the Shooting Technique process heating thermoplastic polymkeric substance with the deterioration polymer properties.Serious deterioration can make polymer unwinds and form gas, and gas can cause hole and shielding properties and mechanical property loss subsequently.In addition, fill in order to realize good mould, this polymkeric substance must have the flange that is enough to filling component or the fluidity of molten of other little features.By selecting thermoplastic material, temperature, the residence time and, realizing melt flow from the shearing of screw rod.High-shear from screw rod provides sufficiently high melt flow, but makes conductive fibers be broken into more and more littler length and reduce the ability that fiber forms the continuous fibre network.
Can perhaps, measure shielding effect by measuring ASTM (American society for testing materials) (the ASTM)-D4935 of far-field shielding effect by measuring ASTM (American society for testing materials) (ASTM) ES7-83 of near-field effect.
US 2002/0108699 disclose under the frequency of 30-1500MHz and 15 weight % fiber-loaded down, the production shielding effect is a 80-90 decibel (far field) and less than the electromagnetic shielding goods in 80 decibels (near fields).
The alternative dry mixing method that forms the shielding goods requires short conductive fibers of cutting and resin directly to mix when injection operation.This typically causes the inconsistent of electrical property between the fiber dispersion of non-constant and parts and the parts.US 2002/0108699 disclose under the frequency of 30-1500MHz and 15 weight % fiber-loaded down, it is the electromagnetic shielding goods of 60-70 decibel (dB) that dried mixing method produces shielding effect.
Fig. 1 show according to US 2002/0108699 at Wiring technology, wherein from packing or reel 105 unwinding fibre bundles 103 and bathe 106 tractives, apply the conductivity coating to tow 103 by aqueous silane.Tow 103 tractives bathe 104 also by baking oven 108 by aqueous silane then.Tow 103 passes non-aqueous applying glue then and bathes 107.Tow 103 is wound on the packing (or reel) 113 then.Granulation coated fibres subsequently also places in the forcing machine of injection moulding machine.
The preceding method that forms EMI shielding composite product is not entirely satisfactory, this be because the length of the staple fibre in final part reduce shielding and make need extra fiber-loaded.From wire enamel application, granulation and subsequently the average fiber length of injection moulding pellet be about 0.5 millimeter.Form the successive network and shielding is provided because conductive fibers must contact with each other, therefore require the carbon fiber of 10-20 weight % or the carbon fiber of nickel coating that competent EMI shielding is provided.This high-caliber fiber-loaded cost that will increase composite product is because the cost of fiber is high and the inhibition polymkeric substance flows in mould.High fiber load also significantly increases the modulus of goods, but reduces shock resistance.In the article such as mobile telephone and desktop computer, use the EMI shielding resin, expect that wherein described resin is can be anti-anti-from falling to many one meter or also want the impact of big distance and do not occur destroying.The thermoplastic resin that is filled into 10-20 weight % fiber becomes fragile and to broken responsive.
Another shortcoming that forms the last method of EMI shielding composite product is that fiber dispersion is poor.The material of granulation is difficult to processing so that fiber disperses fully, does not form effective conductive fibers network in matrix material.Yet, when realizing good Fiber Distribution sometimes, pellet and fiber smashed to pieces make average fiber length be about 0.5 millimeter degree and as a result staple fibre in matrix material, do not form effective conductive fibers network.In either case, need with conductive fibers excessive loads matrix material, with compensation insufficient conductive fibers network in matrix material.
Title discloses the apparatus and method that prepare fibre-reinforced resin and this resin of molding for the U.S. Patent No. 6676864 (introducing by reference in its entirety at this) of " Resin and Fiber Compounding Process for MoldingOperations (resin and the fiber compounding technology that are used for molded operation) ".US 6676864 patents show that injection moulding apparatus comprises two sections forcing machines, and first gives shearing force makes polymer melt and second that the fused thermoplastics is fed in the mould.Between two sections of forcing machine, supply fortifying fibre, for example glass fibre, carbon-graphite fiber or Kai Fula (Kevlar) fiber.The molding apparatus of U.S. Patent No. 6676864 is not considered electromagnetic shielding.
Summary of the invention
The present invention has answered and the relevant problem of last method that forms the EMI shielded polymer.Long fiber thermoplastic technology allow lower fiber-loaded down, conductive fibers is kept is enough to provide the EMI length of shielding.The long fiber thermoplastic process that forms EMI shielding composite product also provides the shock resistance of increase, improve the aesthstic performance on surface and under the refuse of lower material cost and reduction and scrap stock situation improved extruding with injection moulding process.
Compare with the method for prior art, be used for the long fiber thermoplastic process of conductive composites and simpler among the present invention, more effectively and improved performance is provided by its matrix material that forms.
Description of drawings
Comprise the accompanying drawing that the further the present invention of understanding is provided and introduces and constitute this specification sheets part, set forth embodiment of the present invention, and play the effect of explaining the principle of the invention with specification sheets, in the accompanying drawings:
Fig. 1 is the synoptic diagram of the wire enamel coating process of compounding EMI attenuating thermoplastic extruded material in the prior art.
Fig. 2 is the plan view that can be used for implementing the partial cross section of a forcing machine of the present invention.
Specific embodiments
Provide thermoplastic resin from resin supply department 14 to resin main extruder 12, the thermoplastic resin of preferred pellet form.This resin can be any various acceptable thermoplastic resins of intending being used for the product purpose, for example polypropylene, nylon, urethane and polyester.Fusion screw rod 16 is at fusion machine barrel 18 internal rotation of forcing machine 10.Although the shearing force of fusion screw rod 16 can provide sufficient amount of heat fusion and telomerized polymer, fusion machine barrel 18 can be furnished with extra thermal source, and this is as known in the art.
Can use flow control plate 20 in the downstream end of machine barrel 40, control resin 15 flows out extruder barrel 18 and enters coating die head 22.Reduce or by being limited in flowing in the machine barrel 18 in other cases, plate 20 typically limits flowing of resin 15 by diameter.Coating die head 22 can comprise that with any device that contacts with resin 15 suitable heating unit is to keep required resin temperature.Can be by the pressure of pressure monitor sensor in the coating die head, described pressure transmitter provides control signal to the drive-motor 17 of fusion screw rod 16.
Fiber spool 24 provides the direct feeding of shielding fiber tow 26.Shielding fiber can be any suitable composition, for example the nickel that in carbon, Kevlar or glass or other suitable substrates, is coated with, copper or and conductive of material, perhaps can use stainless steel, copper or similar steel fiber.Fiber is pulled by injection nozzle 28 and enters in the coating chamber 32 of coating die head 22.Shielding fiber 26 closely is coated with melt polymer material 15 blend and with it then.The shielding fiber 26 of coating flows out coating die head 22 by the die orifice in the interchangeable plug-in unit 30 36 then.Can regulate the diameter of die orifice 36 by changing plug-in unit 30, with the ratio of control shielding fiber 26 with resin 15.
Resin 15, the mixture of fiber 26 flow out coating die head 22, and can be by scraper 52 cutting shielding fibers 26 in the cutting chamber 50 in the shell 54,56.The mixture of resin 15 and fiber 26 flows out chamber 50 through hole 58 and enters in the forcing machine 60.Forcing machine 60 typically comprises the machine barrel 62 in the mixture feeding extrusion die 64 of resin 15 and fiber 26.Feeding screw bolt 66 is with machine barrel 62 rotation, and can randomly move back and forth along axle 72, with the raw material of moulding material in hole 63 is fed into the mold cavity 68 of die head 64.Feed worm 66 drives by source element 70.
Can be controlled at temperature, coating chamber 32, cutting chamber 50 and forcing machine 60 in the machine barrel 18 by the microprocessor (not shown) of one or more heating unit and temperature probe control.Suitable polymers comprises thermoplastic polymer, for example acrylonitrile-butadiene-styrene (ABS) (ABS), polyethylene terephthalate (PET), polybutylene terephthalate (PBT), polyethylene (PA) and other thermoplastic materials have suitable machinery, heat and melt flowability.
Other fibers comprise the glass and the carbon fiber of metal coated, comprising metal, and for example aluminium, copper, nickel and plumbous coating.Plasma-deposited, melt liquid deposits and electrodeposit metals is the method for preferred coated fiber.
Goods in mold cavity 68 inner mold comprise many independent shielding fibers 26, and wherein each fiber has the predetermined length of establishing by the effect of scraper 52.Moulded parts comprises that length is the wire enamel finishing shown in Figure 1 and the about 3 times fiber of length of comminution granulation.Mean length from wire enamel application, granulation and injection moulding pellet is about 0.5mm.The mean length of the Ni-C fiber of expection is more than or equal to 1.5mm.
The fiber number of the contact by generating conductive network, thus determine the shielding properties of moulding material.It is the 1/4-1/3 of initial amount that long fiber thermoplastics (LFTP) should reduce the required fiber number of the identical connectivity of realization.
Therefore, and need the fiber-loaded opposite of 15%-20 weight %, LFTP can reduce the 4-5 weight % that required fiber is low to moderate matrix material.
Reduce amount of carbon fiber and for example will greatly improve shock strength to 5% load.The loss shock strength will seriously limit the number of applications of conductive composites, for example mobile telephone outside.We can expect that maximum 50% impact improvement or fiber volume drop to 5 weight % more.
Fiber-loaded surperficial aesthstic performance, another problem of the shell of the consumer's goods also improved of 5%.Fiber in the surface obtains the outward appearance of difference.5% fiber-loaded maximum 75% the fiber cost of saving, this can Jie Yue $30 dollar/pound or more.
Embodiment
Following embodiment is Deuteronomic, and has estimated all machineries and shielding properties.In embodiment 1, melting propylene nitrile-butadiene-styrene (ABS) polymkeric substance also joins carbon (NCC) fiber of the nickel of 10% weight coating among the ABS.Cutting fibre is a certain-length, and extrudes the ABS/ fiber melt, forms composite component.
In embodiment 2, the fusion abs polymer, and the NCC fiber of 7.5% weight joined among the ABS.Cutting fibre is a certain-length, and extrudes the ABS/ fiber melt, forms composite component.
In embodiment 3, the fusion abs polymer, and the NCC fiber of 5.0% weight joined among the ABS.Cutting fibre is a certain-length, and extrudes the ABS/ fiber melt, forms composite component.Below estimated the performance of each embodiment.
Embodiment NCC weight % Impact
1 10 By
2 7.5 By
3 5.0 By
Below not only generality but also with respect to specific embodiments has been described the application's invention.Although listed the present invention who thinks preferred embodiment, can in general disclosure, select the known wide in range various alternative of those skilled in the art.The present invention is not limited, unless quote content as proof in the following claim of listing.

Claims (8)

1. have the fibre-reinforced polymer product of improved capability of electromagnetic shielding, it comprises:
Thermoplastic polymer; With
Less than 10 weight % conductive fibers, wherein the electromagnetic shielding efficiency of this composite product is 70dB at least.
2. the fibre-reinforced polymer product of claim 1, wherein electromagnetic shielding efficiency is 90dB at least.
3. the fibre-reinforced polymer product of claim 1, wherein said conductive fibers exists with the consumption less than 5 weight %.
4. the fibre-reinforced polymer product of claim 1, wherein said thermoplastic polymer is selected from acrylonitrile-butadiene-styrene (ABS) (ABS), polyethylene terephthalate (PET), polybutylene terephthalate (PBT) and polyethylene (PA).
5. the fibre-reinforced polymer product of claim 1, wherein the performance degradation of the described thermoplastic polymer that causes because of fusion history significantly descends.
6. make the method for composite product, this method comprises the steps:
Molten thermoplastic;
Add conductive fibers in described molten thermoplastic material;
Cutting described conductive fibers is predetermined length; With
This thermoplastic material of injection moulding forms electromagnetic shielding efficiency and is the composite product of 70dB at least.
7. the digital device that has electro-magnetic screen layer, described screen layer comprises:
Thermoplastic polymer; With
Less than the conductive fibers of 10 weight %, wherein the electromagnetic shielding efficiency of this composite product is 70dB at least.
8. the fibre-reinforced polymer product of claim 7, wherein electromagnetic shielding efficiency is 90dB at least.
CNA200680042734XA 2005-10-24 2006-10-20 Long fiber thermoplastic process for conductive composites and composites formed thereby Pending CN101309959A (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
US72969505P 2005-10-24 2005-10-24
US60/729,695 2005-10-24

Publications (1)

Publication Number Publication Date
CN101309959A true CN101309959A (en) 2008-11-19

Family

ID=37698164

Family Applications (1)

Application Number Title Priority Date Filing Date
CNA200680042734XA Pending CN101309959A (en) 2005-10-24 2006-10-20 Long fiber thermoplastic process for conductive composites and composites formed thereby

Country Status (4)

Country Link
US (1) US20070134482A1 (en)
JP (1) JP2009512774A (en)
CN (1) CN101309959A (en)
WO (1) WO2007050467A1 (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN101838470B (en) * 2009-12-02 2012-06-27 上海科斗电子科技有限公司 Electromagnetic shielding plastic

Families Citing this family (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB0917257D0 (en) * 2009-10-02 2009-11-18 Technical Fibre Products Ltd Magnetic material
CN103238382A (en) * 2010-10-06 2013-08-07 因特瓦产品有限责任公司 Method and apparatus for providing reinforced composite materials with electromagnetic interference shielding
TWI485210B (en) 2011-12-09 2015-05-21 Ind Tech Res Inst Composite material with conductive and ferromagnetic properties, and hybrid slurry thereof
JP6777710B2 (en) * 2013-05-30 2020-10-28 ダイセルポリマー株式会社 Radar transmit / receive antenna protection
EP3867310A4 (en) * 2018-10-16 2022-07-20 Avient Corporation Conductive long fiber thermoplastic compounds for electromagnetic shielding
CN110450488B (en) * 2019-07-31 2020-07-28 山东大学 Preparation method of different stacked-layer carbon fiber cloth/TPU composite material with high electromagnetic shielding performance

Family Cites Families (24)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4338234A (en) * 1980-06-04 1982-07-06 Ppg Industries, Inc. Sizing composition and sized glass fibers and strands produced therewith
US4341877A (en) * 1980-06-04 1982-07-27 Ppg Industries, Inc. Sizing composition and sized glass fibers and process
US4477496A (en) * 1981-06-15 1984-10-16 Ppg Industries, Inc. Process for preparing sized glass fiber roving
US4394418A (en) * 1981-12-24 1983-07-19 Ppg Industries, Inc. Aqueous sizing composition and glass fibers made therewith for reinforcing thermosetting polymers
US4457970A (en) * 1982-06-21 1984-07-03 Ppg Industries, Inc. Glass fiber reinforced thermoplastics
NL8204288A (en) * 1982-11-05 1984-06-01 Gen Electric POLYMER MIX, METHOD FOR PREPARING THE POLYMER MIX, ARTICLES FORMED FROM THE POLYMER MIX.
US4473618A (en) * 1983-05-13 1984-09-25 Owens-Corning Fiberglas Corporation Chrome-free sizing composition containing titanium acetyl acetonate for glass fiber gun roving
US5399295A (en) * 1984-06-11 1995-03-21 The Dow Chemical Company EMI shielding composites
US4789593A (en) * 1985-06-25 1988-12-06 Ppg Industries, Inc. Glass fibers with fast wettability and method of producing same
US5089326A (en) * 1987-05-29 1992-02-18 Phillips Petroleum Company EMI shielded composites and process of making same
US5013771A (en) * 1989-12-21 1991-05-07 Union Carbide Chemicals And Plastics Technology Corporation Process for the production of glass fiber reinforced composite material
US5242958A (en) * 1991-07-12 1993-09-07 Ppg Industries, Inc. Chemical treating composition for glass fibers having emulsified epoxy with good stability and the treated glass fibers
US5366664A (en) * 1992-05-04 1994-11-22 The Penn State Research Foundation Electromagnetic shielding materials
US5354829A (en) * 1992-06-30 1994-10-11 Ppg Industries, Inc. Silylated polyamine polymers and a method of treating fibers
US5641572A (en) * 1993-12-27 1997-06-24 Mitsubishi Chemical Corporation Short carbon fiber bundling mass, process for producing the same and fiber-reinforced thermoplastic resin composition
US5904980A (en) * 1996-05-13 1999-05-18 Rivas; Victor A. Electromagnetic interference (EMI) shielding and electrostatic discharge degradable polymers and monomers
US20020108699A1 (en) * 1996-08-12 2002-08-15 Cofer Cameron G. Method for forming electrically conductive impregnated fibers and fiber pellets
US7078098B1 (en) * 2000-06-30 2006-07-18 Parker-Hannifin Corporation Composites comprising fibers dispersed in a polymer matrix having improved shielding with lower amounts of conducive fiber
FR2755127B1 (en) * 1996-10-29 1998-11-27 Vetrotex France Sa SIZED GLASS WIRES FOR THE REINFORCEMENT OF POLYMERIC MATERIALS
TW527279B (en) * 1997-12-30 2003-04-11 Dung-Han Juang Superplastic alloy-containing conductive plastic article for shielding electromagnetic interference and process for manufacturing the same
US6228281B1 (en) * 1998-10-30 2001-05-08 Owens Corning Fiberglas Technology Sizing for glass fibers having low nonionic and cationic lubricant content
US6186769B1 (en) * 1999-04-06 2001-02-13 Woodshed Technologies Resin and fiber compounding apparatus for molding operations
JP3905477B2 (en) * 2000-10-26 2007-04-18 日本エイアンドエル株式会社 Flame-retardant electromagnetic shielding thermoplastic resin composition
US7118693B2 (en) * 2001-07-27 2006-10-10 Eikos, Inc. Conformal coatings comprising carbon nanotubes

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN101838470B (en) * 2009-12-02 2012-06-27 上海科斗电子科技有限公司 Electromagnetic shielding plastic

Also Published As

Publication number Publication date
WO2007050467A1 (en) 2007-05-03
US20070134482A1 (en) 2007-06-14
JP2009512774A (en) 2009-03-26

Similar Documents

Publication Publication Date Title
US5397608A (en) Plastic article containing electrically conductive fibers
CN101309959A (en) Long fiber thermoplastic process for conductive composites and composites formed thereby
CA1194688A (en) Plastic article containing electrically conductive fibers
US5595696A (en) Plastic material, and process for the preparation thereof
CN101812239B (en) Method for preparing particle-filled conductive thermoplastic polymer
JPH01286400A (en) Composite material containing metal fiber and method of applying it to manufacture of electromagnetic shielding molded product
CN103238382A (en) Method and apparatus for providing reinforced composite materials with electromagnetic interference shielding
EP1105277B1 (en) Coated, long fiber reinforcing composite structure and process of preparation thereof
WO2017057424A1 (en) Molded resin strand
US20070207316A1 (en) Electriplast moldable composite capsule
US20020180095A1 (en) Thermally conductive carbon fiber extrusion compounder and method of using same
US8858848B2 (en) Foaming agent to improve EMI shielding
US5939001A (en) Process for manufacturing objects from fiber-reinforced thermoplasts
CN102617986A (en) Method for preparing stainless steel fiber resin matrix composite conductive plastics
JPH08325385A (en) Carbon-fiber reinforced thermoplastic resin molding and its production
KR101108893B1 (en) Antenna cover manufacturing apparatus and its manufacturing method
KR100787562B1 (en) A method of preparing resin composition pellet for shielding electro-magnetic interference and molded articles using it
US20150213917A1 (en) Electriplast moldable composite capsule
JPS5922710A (en) Manufacture of electroconductive molding material
KR100910087B1 (en) In-mold metallized polymer components and method of manufacturing same
JPS6296564A (en) Electrically conductive plastic molding material and production thereof
JPS608014A (en) Plastic molding material
JPH0555287B2 (en)
JPH0369284B2 (en)
JPH08244054A (en) Housing and production thereof

Legal Events

Date Code Title Description
C06 Publication
PB01 Publication
C10 Entry into substantive examination
SE01 Entry into force of request for substantive examination
C02 Deemed withdrawal of patent application after publication (patent law 2001)
WD01 Invention patent application deemed withdrawn after publication

Open date: 20081119