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WO1995016814A1 - Procede de revetement par poudre utilise pour produire un non-tisse composite - Google Patents

Procede de revetement par poudre utilise pour produire un non-tisse composite Download PDF

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Publication number
WO1995016814A1
WO1995016814A1 PCT/US1994/013771 US9413771W WO9516814A1 WO 1995016814 A1 WO1995016814 A1 WO 1995016814A1 US 9413771 W US9413771 W US 9413771W WO 9516814 A1 WO9516814 A1 WO 9516814A1
Authority
WO
WIPO (PCT)
Prior art keywords
fabric
resinous material
station
filaments
bundles
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.)
Ceased
Application number
PCT/US1994/013771
Other languages
English (en)
Inventor
Denis Mckay
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.)
Electrostatic Technology Inc
Original Assignee
Electrostatic Technology Inc
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 Electrostatic Technology Inc filed Critical Electrostatic Technology Inc
Priority to AU12636/95A priority Critical patent/AU1263695A/en
Publication of WO1995016814A1 publication Critical patent/WO1995016814A1/fr
Anticipated expiration legal-status Critical
Ceased legal-status Critical Current

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Classifications

    • C—CHEMISTRY; METALLURGY
    • C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
    • C08J—WORKING-UP; GENERAL PROCESSES OF COMPOUNDING; AFTER-TREATMENT NOT COVERED BY SUBCLASSES C08B, C08C, C08F, C08G or C08H
    • C08J5/00—Manufacture of articles or shaped materials containing macromolecular substances
    • C08J5/24—Impregnating materials with prepolymers which can be polymerised in situ, e.g. manufacture of prepregs
    • C08J5/248—Impregnating materials with prepolymers which can be polymerised in situ, e.g. manufacture of prepregs using pre-treated fibres
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B05—SPRAYING OR ATOMISING IN GENERAL; APPLYING FLUENT MATERIALS TO SURFACES, IN GENERAL
    • B05D—PROCESSES FOR APPLYING FLUENT MATERIALS TO SURFACES, IN GENERAL
    • B05D1/00—Processes for applying liquids or other fluent materials
    • B05D1/02—Processes for applying liquids or other fluent materials performed by spraying
    • B05D1/04—Processes for applying liquids or other fluent materials performed by spraying involving the use of an electrostatic field
    • B05D1/045—Processes for applying liquids or other fluent materials performed by spraying involving the use of an electrostatic field on non-conductive substrates
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29B—PREPARATION OR PRETREATMENT OF THE MATERIAL TO BE SHAPED; MAKING GRANULES OR PREFORMS; RECOVERY OF PLASTICS OR OTHER CONSTITUENTS OF WASTE MATERIAL CONTAINING PLASTICS
    • B29B15/00—Pretreatment of the material to be shaped, not covered by groups B29B7/00 - B29B13/00
    • B29B15/08—Pretreatment of the material to be shaped, not covered by groups B29B7/00 - B29B13/00 of reinforcements or fillers
    • B29B15/10—Coating or impregnating independently of the moulding or shaping step
    • B29B15/105—Coating or impregnating independently of the moulding or shaping step of reinforcement of definite length with a matrix in solid form, e.g. powder, fibre or sheet form
    • D—TEXTILES; PAPER
    • D06—TREATMENT OF TEXTILES OR THE LIKE; LAUNDERING; FLEXIBLE MATERIALS NOT OTHERWISE PROVIDED FOR
    • D06M—TREATMENT, NOT PROVIDED FOR ELSEWHERE IN CLASS D06, OF FIBRES, THREADS, YARNS, FABRICS, FEATHERS OR FIBROUS GOODS MADE FROM SUCH MATERIALS
    • D06M23/00—Treatment of fibres, threads, yarns, fabrics or fibrous goods made from such materials, characterised by the process
    • D06M23/08—Processes in which the treating agent is applied in powder or granular form
    • D—TEXTILES; PAPER
    • D06—TREATMENT OF TEXTILES OR THE LIKE; LAUNDERING; FLEXIBLE MATERIALS NOT OTHERWISE PROVIDED FOR
    • D06N—WALL, FLOOR, OR LIKE COVERING MATERIALS, e.g. LINOLEUM, OILCLOTH, ARTIFICIAL LEATHER, ROOFING FELT, CONSISTING OF A FIBROUS WEB COATED WITH A LAYER OF MACROMOLECULAR MATERIAL; FLEXIBLE SHEET MATERIAL NOT OTHERWISE PROVIDED FOR
    • D06N3/00—Artificial leather, oilcloth or other material obtained by covering fibrous webs with macromolecular material, e.g. resins, rubber or derivatives thereof
    • D06N3/0086—Artificial leather, oilcloth or other material obtained by covering fibrous webs with macromolecular material, e.g. resins, rubber or derivatives thereof characterised by the application technique
    • D06N3/0088—Artificial leather, oilcloth or other material obtained by covering fibrous webs with macromolecular material, e.g. resins, rubber or derivatives thereof characterised by the application technique by directly applying the resin
    • D06N3/0093—Artificial leather, oilcloth or other material obtained by covering fibrous webs with macromolecular material, e.g. resins, rubber or derivatives thereof characterised by the application technique by directly applying the resin by applying resin powders; by sintering
    • 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
    • H05K1/00—Printed circuits
    • H05K1/02—Details
    • H05K1/03—Use of materials for the substrate
    • H05K1/0313—Organic insulating material
    • H05K1/0353—Organic insulating material consisting of two or more materials, e.g. two or more polymers, polymer + filler, + reinforcement
    • H05K1/0366—Organic insulating material consisting of two or more materials, e.g. two or more polymers, polymer + filler, + reinforcement reinforced, e.g. by fibres, fabrics
    • 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
    • H05K2201/00—Indexing scheme relating to printed circuits covered by H05K1/00
    • H05K2201/01—Dielectrics
    • H05K2201/0137—Materials
    • H05K2201/0145—Polyester, e.g. polyethylene terephthalate [PET], polyethylene naphthalate [PEN]
    • 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
    • H05K2201/00—Indexing scheme relating to printed circuits covered by H05K1/00
    • H05K2201/02—Fillers; Particles; Fibers; Reinforcement materials
    • H05K2201/0275—Fibers and reinforcement materials
    • H05K2201/0278—Polymeric fibers
    • 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
    • H05K2201/00—Indexing scheme relating to printed circuits covered by H05K1/00
    • H05K2201/02—Fillers; Particles; Fibers; Reinforcement materials
    • H05K2201/0275—Fibers and reinforcement materials
    • H05K2201/0284—Paper, e.g. as reinforcement
    • 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
    • H05K2201/00—Indexing scheme relating to printed circuits covered by H05K1/00
    • H05K2201/02—Fillers; Particles; Fibers; Reinforcement materials
    • H05K2201/0275—Fibers and reinforcement materials
    • H05K2201/029—Woven fibrous reinforcement or textile
    • 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
    • H05K2201/00—Indexing scheme relating to printed circuits covered by H05K1/00
    • H05K2201/02—Fillers; Particles; Fibers; Reinforcement materials
    • H05K2201/0275—Fibers and reinforcement materials
    • H05K2201/0293—Non-woven fibrous reinforcement
    • 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
    • H05K2201/00—Indexing scheme relating to printed circuits covered by H05K1/00
    • H05K2201/03—Conductive materials
    • H05K2201/032—Materials
    • H05K2201/0323—Carbon
    • 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
    • H05K2203/00—Indexing scheme relating to apparatus or processes for manufacturing printed circuits covered by H05K3/00
    • H05K2203/11—Treatments characterised by their effect, e.g. heating, cooling, roughening
    • H05K2203/1105—Heating or thermal processing not related to soldering, firing, curing or laminating, e.g. for shaping the substrate or during finish plating
    • 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
    • H05K2203/00—Indexing scheme relating to apparatus or processes for manufacturing printed circuits covered by H05K3/00
    • H05K2203/13—Moulding and encapsulation; Deposition techniques; Protective layers
    • H05K2203/1333—Deposition techniques, e.g. coating
    • H05K2203/1355—Powder coating of insulating material
    • 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
    • H05K3/00—Apparatus or processes for manufacturing printed circuits
    • H05K3/02—Apparatus or processes for manufacturing printed circuits in which the conductive material is applied to the surface of the insulating support and is thereafter removed from such areas of the surface which are not intended for current conducting or shielding
    • H05K3/022—Processes for manufacturing precursors of printed circuits, i.e. copper-clad substrates

Definitions

  • Composite materials comprised of fibers in resinous matrices are taught rather extensively in the art, and are widely used for diverse applications.
  • the reinforcing fibers contained in such composites may range in length from very short to continuous, and they may be incorporated as single strands, as multifilament bundles or yarns, and as woven or nonwoven fabrics and webs. Regardless of form, the fibers will generally be impregnated by saturating them with a dispersion, solution, or melt of the matrix-forming resin.
  • Circuit boards, used for printed circuit applications are especially well suited for fabrication from composite materials of the kind described above; this use is disclosed for example in Medney et al, United States patent No. 4,943,334.
  • Such boards are conventionally manufactured by laying up a number of plies of impregnated fiberglass cloth, and converting the resultant mass to a coherent structure through the application of heat and pressure.
  • the impregnant will usually be either a phenolic or an epoxy thermosetting resin, and consequently the process must be carefully controlled to ensure that the thermo- set material does not cure beyond its so-called "B-stage" con ⁇ dition; full cross-linking of the resin is reserved for subse ⁇ quent laminating steps.
  • the fiberglass cloth is saturated by drawing it through a solvent solution of the matrix-forming polymer. Suitable mechanical means is then used to remove excess polymer solution, and the thus-impregnated material is thereafter drawn through an oven to drive off the solvents and to flow out the resin to a "tack-free" condition; plies of the product may then be laminated to produce a multilayer circuit board structure.
  • the solvents for the impregnating resins used are normally toxic, and frequently they are also highly flammable; means is therefore usually required for the recycle, disposal, or de ⁇ struction of the solvent after removal from the cloth. More- over, coating processes of the kind described require constant monitoring, both to adjust the concentration of the polymer and also to control the mechanical resin-removal system.
  • Brown et al employ electrostatic charging techniques both for strand opening and also for particle impregnation. It is taught that the invention is applicable in the production of mats, webs, or fabrics, but clearly the patents do not conte - plate the impregnation of preformed fabrics, in which the con ⁇ stituent filaments may lie in fixed relative positions close to one another.
  • Swann, No. 2,730,455 provides a method for coating glass fibers which involves spreading of the fibers by the use of electrostatic effects.
  • a nonwoven fabric is produced by electrostatically distributing dry adhe ⁇ sive particles throughout a loose, fibrous web, the particles subsequently being rendered adherent.
  • Adhesive-coated sheeting material is made, pursuant to the teachings of Dickey et al No. 2,869,511, by use of an electro ⁇ static deposition method.
  • Terrell et al, No. 3,354,013 provides a process in which continuous filament tow is impregnated with a particulate addi ⁇ tive from a fluidized bed; the prior use of induced electro- static charges, for applying powder to fibers, is mentioned.
  • Williams, Jr. et al. No. 3,549,403 teaches an electro ⁇ static deposition method for applying a powdered thermoplastic resin to uncalendered paper, followed by hot compression roll ⁇ ing to produce an adherent polymeric film on the paper.
  • Lamanche et al. No. 3,703,396, teaches the impregnation of strands by passing them through an electrostatic fluidized bed; separation of the fibers may be achieved by electrostatic re- pulsion or by air current effects, and the strands may be dis ⁇ posed in a parallel relationship to one another to provide a sheet of threads.
  • yarn is bulked electrostatically and is impregnated with charged resin particles.
  • Price, No. 3,742,106 provides a fiber-reinforced thermo ⁇ plastic body by impregnating a roving in a fluidized bed, the strands of the roving being separated by a comb or by ribbed rods or bars; the use of electrostatic effects for causing penetration of the polymer is expressly discounted.
  • Pan describes an electrostatic method for coating a continuous web, which web may be conductive or nonconductive.
  • Gray et al. No. 4,098,927 provides a method in which con- tinuous glass roving is impregnated with resin powder in a fluidized bed, using a series of bars to separate the roving into bundles of filaments.
  • Garner Nos. 4,205,515 and 4,252,583, describe an opening member that can be positioned in a fluidized bed to assist filling of cables with powder.
  • Yamada et al. No. 4,427,482 provides a method for pro- ducing prepreg rovings and fiber-reinforced plastic articles, in which polyester reactants are impregnated into the roving, which may then be consolidated with monomer-impregnated sheet plies.
  • Drain et al. No. 4,892,764 discloses fiber/resin compos ⁇ ites whose resin phase is comprised of two components, at least one of which is curable by actinic radiation.
  • Fay et al. No. 4,913,956, teaches a moldable blanket made by depositing a liquid binder and a dry binder (the latter in the form of a powered resin) upon glass fiber, which may con ⁇ tain other reinforcing fibers, as well.
  • Pettit, Jr., No. 4,921,913 concerns the electrostatic de- position of powder to various substrates, by use of spraying or fluidized bed apparatus; the substrates include fiber-rein ⁇ forced plastics.
  • Asensio et al. No. 4,927,684 discloses the use of a woven fabric for reinforcing a multilayer plastic article.
  • prepregs are formed by impregnating a woven roving with a solution of thermoset polyester, and are molded to produce ballistic- resistant composites.
  • Re.22,419 for coating opposite sides of fabric, paper, or the like to produce adhesive articles.
  • thermo ⁇ plastic towpregs by electrostatic deposition of charged and fluidized polymer powders on spread continuous fiber tows.
  • It is also an object of the invention is to provide such a method in which deep penetration of the resin into the fibrous component, and ultimately full impregnation, are achieved ef ⁇ fectively, with facility, and at atmospheric pressure (i.e., without need for pressure assistance) , to produce a composite web that is free from voids.
  • Another object is to provide such a method by which any of numerous species of fibrous materials and resinous materials can readily be combined with one another, which method is in addition highly advantageous from economic as well as environ ⁇ mental standpoints.
  • a further specific object of the invention is to provide a method having the foregoing features and advantages, which is especially well suited for the production of a formed article of manufacture, and particularly laminate structures.
  • the foregoing and related ob- jects of the invention are attained by the provision of a method for the production of a composite web, utilizing a con ⁇ tinuous-length fabric of multi-filament bundles, in which the filaments lie in substantially fixed relative positions of close mutual contact.
  • the fibrous substrate is transported sequentially through a wetting station, a coating station, and a heating station, without substantial opening or spreading of the filaments.
  • Moisture is applied to the fabric at the wetting station, and solid parti ⁇ cles of a fusible synthetic resinous material are applied at the coating station.
  • FIG. 1 is a plan view of a section, generally designated by the numeral 10, of a composite web produced by the method of the invention, in which the fibers of a plain weave fabric are encapsulated within a matrix of synthetic resinous material.
  • moisture is applied to the fabric at the wetting station to enhance penetration of the fused particulate material.
  • the fabric will normally exit from the wetting station with a moisture content in the range 5 to 25 weight percent, based upon the weight of the dry fabric, as may result by merely spraying its surfaces with water or by treating the fabric with steam to effect moistening.
  • the moisture content of the exiting fabric will be at least 9 percent (on the same basis) , and 12 percent will gener ⁇ ally represent an optimal upper limit.
  • solid particles of a fusible syn- thetic resinous material are deposited upon the substrate by any suitable means, e.g., by simple gravity feed, mechanical spreading, electrostatic attraction, etc.
  • the fabric may be stationary or moving during coating, and it may be disposed in any appropriate attitude (e.g., horizontal or vertical); the fabric itself may be of any suitable form, including discrete pieces and continuous lengths.
  • the fabric is heated to an elevat ⁇ ed temperature above ambient using any appropriate source of thermal energy, including radiant and/or convection heating.
  • the coated substrate is maintained at temperature for a period sufficient to effect fusion of the resinous material and move ⁇ ment thereof into the bundles, thereby to achieve encapsulation of the filaments; the resin is believed to infuse into the fibrous material through capillary action, displacing any air or moisture that may be present in the interstices.
  • applied pressure assistance may be desirable in certain instances.
  • the oven, bank of lamps, or other form of heating station employed must be of a sufficient length to enable both effects to occur before the resin loses its requisite fluidity, and therefore it is the heating station that will usually represent the limiting factor in attaining maximum throughput rates.
  • the resinous material must remain fusible at the elevated temperature to which the substrate is initially heated.
  • Thermoplastic resins will of course inherently remain fusible; to maintain thermosetting resins in that state, however, care must be taken not to prema ⁇ turely heat the resin to a temperature above that at which it will exist in its B-stage (cross-linked, but less than fully cured) condition.
  • the resin must exhibit a melt viscosity at the temperature of operation which is sufficiently low to per ⁇ mit a degree of penetration that is adequate to achieve the objectives set forth.
  • any conventional fabric style or weave known to those skilled in the art e.g., basket, plain, crow ⁇ foot satin, harness satin
  • the fabric has a weave that is sufficiently tight as to substantially immobilize the filaments of the constituent bundles against relative displacement from their established positions of intimate mutual contact.
  • the filaments of which the fibrous substrate is comprised will advantageously be selected from the group consisting of cellulosic fibers, fiber ⁇ glass, carbon fibers, graphite fibers, polyester fibers, aramids (e.g., Kevlar) and mixtures thereof.
  • the filament diameter will desirably be in the range 6 to 10 microns
  • the denier of the warp and filling yarns e.g., of a Kevlar fabric
  • the yarn count warp x filling, per inch
  • the fabric will desirably be about 5 to 30 mils thick.
  • the synthetic resinous material used for coating may, as noted, be either a thermosetting resin or a thermoplastic resin; suitable classes of resins include epoxy resins, pheno- lie resins, polyester resins, polyether resins, alkyd resins, polyamide resins, polyamide resins, bismaleimide resins, poly- olefins, vinyl resins, etc., as will be evident to those skilled in the art.
  • the resin particles will normally be of a size in the range 10 to 200 microns. It should be noted that the ability to effectively encapsulate fine filaments (e.g., of 6 to 10 microns diameter) using a resin of substantially larger average particle size is regarded to be a surprising benefit of the instant method.
  • the deposit on the substrate will advanta ⁇ geously be sufficient to cause substantially complete encapsu ⁇ lation of the filaments throughout the full thickness of the fabric; normally, sufficient resin will be deposited to provide about 35 to 70 percent thereof, based upon the weight of the composite web.
  • the method of the invention will usually include the addi ⁇ tional step of cooling the composite to solidify the fused resinous material, and in many instances it will advantageously include the further step of forming the resultant web, under heat and pressure, to produce an article of manufacture. More par-ticularly, a plurality of plies of a fabric-reinforced com ⁇ posite web may be stacked and then subjected to the forming step, to produce a laminate structure suitable for use in the manufacture of circuit boards. It will be appreciated that, when a thermosetting matrix resin is employed, the temperature attained in the forming step will be higher than that at which fusion is effected in the initial heating step, and will be sufficient to convert the resinous material to its fully cured condition. Thermosetting resins used must of course have a glass transition temperature that is low enough to permit flow- out at the temperature of initial heating, without effecting excessive crosslinking.
  • resin "pp" was a polypropylene resin having a melt temperature in the range 162° to 168° Centigrade, a density of 0.905 g/cm 3 , and a melt flow index of 180 g/10 min.
  • resin "E” was a brominated epoxy resin having a melt temperature of about 50° Centigrade and a density of 1.42 g/cm 3
  • resin "PE” was a polyester having a melt temperature of 38° Centigrade, and a density of 1.5 g/cm 3 .
  • the suffix to the test number indicates which resin was employed; the comments indicate any variations in the conditions applied, and the results observed.
  • 4-PP Test 3 was repeated, but the slides were maintained on the hotplate for 40 seconds. The dry sample turned brown, and did not stick to the slide; the wet sa ple remained colorless, and did adhere.
  • 5-PP Test 4 was repeated, but using somewhat less resin on the dry swatch than on the wet one. The results were the same. 6-PP One of the slides was pretreated by applying and evaporating water. Polymer, applied directly to the treated slide and to an untreated one melted and spread indistinguishably. 7-PP The polymer was applied directly (i.e., with no fab ⁇ ric) to wet and dry slides. When the water boiled, the power on the wet slide dispersed and covered a greater surface area than it did on the dry slide.
  • the present invention provides a practical and commercially attractive method for the fabrica ⁇ tion of fiber-reinforced composite materials, using fabrics composed of multifilament bundles.
  • Production can be carried out at high rates of speed, at ambient pressures and on commer ⁇ cially available equipment.
  • Full impregnation of the resin into the fibrous component is readily and effectively achieved, and the method is highly advantageous from both economic and also environmental standpoints.
  • Numerous combinations of fibers and resins can be used in the practice of the method, which is especially well suited for the production of laminate structures and other articles.

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  • Chemical & Material Sciences (AREA)
  • Engineering & Computer Science (AREA)
  • Materials Engineering (AREA)
  • Manufacturing & Machinery (AREA)
  • Health & Medical Sciences (AREA)
  • Chemical Kinetics & Catalysis (AREA)
  • Medicinal Chemistry (AREA)
  • Polymers & Plastics (AREA)
  • Organic Chemistry (AREA)
  • Textile Engineering (AREA)
  • Microelectronics & Electronic Packaging (AREA)
  • Mechanical Engineering (AREA)
  • Reinforced Plastic Materials (AREA)

Abstract

Un tissu humide formé de faisceaux de multifilaments est recouvert d'une matière particulaire solide, qui est fondue et solidifiée pour produire un non-tissé composite renforcé par des fibres. La pénétration en profondeur de la résine fondue s'effectue sans application de pression.
PCT/US1994/013771 1993-12-13 1994-12-01 Procede de revetement par poudre utilise pour produire un non-tisse composite Ceased WO1995016814A1 (fr)

Priority Applications (1)

Application Number Priority Date Filing Date Title
AU12636/95A AU1263695A (en) 1993-12-13 1994-12-01 Powder coating method for producing a composite web

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
US16570293A 1993-12-13 1993-12-13
US08/165,702 1993-12-13

Publications (1)

Publication Number Publication Date
WO1995016814A1 true WO1995016814A1 (fr) 1995-06-22

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Application Number Title Priority Date Filing Date
PCT/US1994/013771 Ceased WO1995016814A1 (fr) 1993-12-13 1994-12-01 Procede de revetement par poudre utilise pour produire un non-tisse composite

Country Status (2)

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AU (1) AU1263695A (fr)
WO (1) WO1995016814A1 (fr)

Cited By (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US5681361A (en) * 1996-01-11 1997-10-28 Minnesota Mining And Manufacturing Company Method of making an abrasive article and abrasive article produced thereby
WO1999047276A1 (fr) * 1998-03-16 1999-09-23 Advanced Photonics Technologies Ag Procede de laquage par poudrage
EP1035156A4 (fr) * 1997-11-26 2001-01-31 Sumitomo Bakelite Co Procedes de production de preimpregnes et de stratifies en planche
EP1134035A1 (fr) * 2000-03-13 2001-09-19 Solipat Ag Procédé et appareil pour appliquer un revêtement partiel sur une surface
WO2012130732A1 (fr) * 2011-03-29 2012-10-04 Sgl Carbon Se Procédé de fabrication d'un préimprégné et d'une tôle organique pouvant être obtenue à partir de ce dernier
CN115160782A (zh) * 2021-04-01 2022-10-11 航天特种材料及工艺技术研究所 一种导电耐高温聚酰亚胺复合材料及其制备方法

Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB549615A (en) * 1941-06-06 1942-11-30 Burns Ltd J Improvements in and relating to the manufacture of impregnated materials
FR1377319A (fr) * 1962-07-20 1964-11-06 Monsanto Chemicals Procédé pour le traitement et le finissage d'articles, et produits obtenus par ce procédé
FR1540519A (fr) * 1967-08-23 1968-09-27 Procédé de réalisation de produits en feuilles souples perméables à l'air plus particulièrement destinés à recouvrir, capitonner ou renforcer des articles divers
US4496415A (en) * 1982-04-08 1985-01-29 Westinghouse Electric Corp. Method for impregnating resin powder directly into a laminate lay up
WO1992015404A1 (fr) * 1991-03-01 1992-09-17 S.L. Electrostatic Technology, Inc. Procede de depot de poudre pour revetement electrostatique, en vue de produire des stratifies pour plaquettes a circuits imprimes et similaires

Patent Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB549615A (en) * 1941-06-06 1942-11-30 Burns Ltd J Improvements in and relating to the manufacture of impregnated materials
FR1377319A (fr) * 1962-07-20 1964-11-06 Monsanto Chemicals Procédé pour le traitement et le finissage d'articles, et produits obtenus par ce procédé
FR1540519A (fr) * 1967-08-23 1968-09-27 Procédé de réalisation de produits en feuilles souples perméables à l'air plus particulièrement destinés à recouvrir, capitonner ou renforcer des articles divers
US4496415A (en) * 1982-04-08 1985-01-29 Westinghouse Electric Corp. Method for impregnating resin powder directly into a laminate lay up
WO1992015404A1 (fr) * 1991-03-01 1992-09-17 S.L. Electrostatic Technology, Inc. Procede de depot de poudre pour revetement electrostatique, en vue de produire des stratifies pour plaquettes a circuits imprimes et similaires

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US5681361A (en) * 1996-01-11 1997-10-28 Minnesota Mining And Manufacturing Company Method of making an abrasive article and abrasive article produced thereby
EP1035156A4 (fr) * 1997-11-26 2001-01-31 Sumitomo Bakelite Co Procedes de production de preimpregnes et de stratifies en planche
WO1999047276A1 (fr) * 1998-03-16 1999-09-23 Advanced Photonics Technologies Ag Procede de laquage par poudrage
US6436485B1 (en) 1998-03-16 2002-08-20 Advanced Photonics Method for powder-coating
KR100685477B1 (ko) * 1998-03-16 2007-02-23 어드밴스드 포토닉스 테크놀로지스 에이쥐 분말 코팅 방법
EP1134035A1 (fr) * 2000-03-13 2001-09-19 Solipat Ag Procédé et appareil pour appliquer un revêtement partiel sur une surface
WO2001068272A3 (fr) * 2000-03-13 2002-03-07 Solipat Ag Procede et dispositif permettant l'application d'un revetement de surface partiel
WO2012130732A1 (fr) * 2011-03-29 2012-10-04 Sgl Carbon Se Procédé de fabrication d'un préimprégné et d'une tôle organique pouvant être obtenue à partir de ce dernier
CN115160782A (zh) * 2021-04-01 2022-10-11 航天特种材料及工艺技术研究所 一种导电耐高温聚酰亚胺复合材料及其制备方法
CN115160782B (zh) * 2021-04-01 2023-11-03 航天特种材料及工艺技术研究所 一种导电耐高温聚酰亚胺复合材料及其制备方法

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