WO1989004247A1 - Process for producing reinforced thermoplastic sheets and related apparatus - Google Patents

Process for producing reinforced thermoplastic sheets and related apparatus Download PDF

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Publication number
WO1989004247A1
WO1989004247A1 PCT/IT1988/000080 IT8800080W WO8904247A1 WO 1989004247 A1 WO1989004247 A1 WO 1989004247A1 IT 8800080 W IT8800080 W IT 8800080W WO 8904247 A1 WO8904247 A1 WO 8904247A1
Authority
WO
WIPO (PCT)
Prior art keywords
threads
die
coated
movable means
thermoplastic sheets
Prior art date
Application number
PCT/IT1988/000080
Other languages
French (fr)
Inventor
Amelia Pessina
Original Assignee
Amelia Pessina
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 Amelia Pessina filed Critical Amelia Pessina
Publication of WO1989004247A1 publication Critical patent/WO1989004247A1/en

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Classifications

    • 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
    • B29C70/00—Shaping composites, i.e. plastics material comprising reinforcements, fillers or preformed parts, e.g. inserts
    • B29C70/04—Shaping composites, i.e. plastics material comprising reinforcements, fillers or preformed parts, e.g. inserts comprising reinforcements only, e.g. self-reinforcing plastics
    • B29C70/28—Shaping operations therefor
    • B29C70/40—Shaping or impregnating by compression not applied
    • B29C70/50—Shaping or impregnating by compression not applied for producing articles of indefinite length, e.g. prepregs, sheet moulding compounds [SMC] or cross moulding compounds [XMC]
    • B29C70/504—Shaping or impregnating by compression not applied for producing articles of indefinite length, e.g. prepregs, sheet moulding compounds [SMC] or cross moulding compounds [XMC] using rollers or pressure bands
    • 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
    • B29B15/12—Coating or impregnating independently of the moulding or shaping step of reinforcements of indefinite length
    • B29B15/122—Coating or impregnating independently of the moulding or shaping step of reinforcements of indefinite length with a matrix in liquid form, e.g. as melt, solution or latex
    • 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
    • B29B15/12—Coating or impregnating independently of the moulding or shaping step of reinforcements of indefinite length
    • B29B15/14—Coating or impregnating independently of the moulding or shaping step of reinforcements of indefinite length of filaments or wires
    • 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
    • B29C48/00—Extrusion moulding, i.e. expressing the moulding material through a die or nozzle which imparts the desired form; Apparatus therefor
    • B29C48/03—Extrusion moulding, i.e. expressing the moulding material through a die or nozzle which imparts the desired form; Apparatus therefor characterised by the shape of the extruded material at extrusion
    • B29C48/05—Filamentary, e.g. strands
    • 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
    • B29C48/00—Extrusion moulding, i.e. expressing the moulding material through a die or nozzle which imparts the desired form; Apparatus therefor
    • B29C48/03—Extrusion moulding, i.e. expressing the moulding material through a die or nozzle which imparts the desired form; Apparatus therefor characterised by the shape of the extruded material at extrusion
    • B29C48/07—Flat, e.g. panels
    • B29C48/08—Flat, e.g. panels flexible, e.g. films
    • 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
    • B29C48/00—Extrusion moulding, i.e. expressing the moulding material through a die or nozzle which imparts the desired form; Apparatus therefor
    • B29C48/15—Extrusion moulding, i.e. expressing the moulding material through a die or nozzle which imparts the desired form; Apparatus therefor incorporating preformed parts or layers, e.g. extrusion moulding around inserts
    • B29C48/156—Coating two or more articles simultaneously
    • 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
    • B29C48/00—Extrusion moulding, i.e. expressing the moulding material through a die or nozzle which imparts the desired form; Apparatus therefor
    • B29C48/25—Component parts, details or accessories; Auxiliary operations
    • B29C48/30—Extrusion nozzles or dies
    • B29C48/32—Extrusion nozzles or dies with annular openings, e.g. for forming tubular articles
    • B29C48/335—Multiple annular extrusion nozzles in coaxial arrangement, e.g. for making multi-layered tubular articles
    • 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
    • B29C48/00—Extrusion moulding, i.e. expressing the moulding material through a die or nozzle which imparts the desired form; Apparatus therefor
    • B29C48/15—Extrusion moulding, i.e. expressing the moulding material through a die or nozzle which imparts the desired form; Apparatus therefor incorporating preformed parts or layers, e.g. extrusion moulding around inserts
    • B29C48/154—Coating solid articles, i.e. non-hollow articles
    • 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
    • B29C48/00—Extrusion moulding, i.e. expressing the moulding material through a die or nozzle which imparts the desired form; Apparatus therefor
    • B29C48/16—Articles comprising two or more components, e.g. co-extruded layers
    • B29C48/18—Articles comprising two or more components, e.g. co-extruded layers the components being layers
    • B29C48/21—Articles comprising two or more components, e.g. co-extruded layers the components being layers the layers being joined at their surfaces
    • 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
    • B29C48/00—Extrusion moulding, i.e. expressing the moulding material through a die or nozzle which imparts the desired form; Apparatus therefor
    • B29C48/25—Component parts, details or accessories; Auxiliary operations
    • B29C48/30—Extrusion nozzles or dies
    • B29C48/32—Extrusion nozzles or dies with annular openings, e.g. for forming tubular articles
    • B29C48/34—Cross-head annular extrusion nozzles, i.e. for simultaneously receiving moulding material and the preform to be coated
    • 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
    • B29C48/00—Extrusion moulding, i.e. expressing the moulding material through a die or nozzle which imparts the desired form; Apparatus therefor
    • B29C48/25—Component parts, details or accessories; Auxiliary operations
    • B29C48/30—Extrusion nozzles or dies
    • B29C48/345—Extrusion nozzles comprising two or more adjacently arranged ports, for simultaneously extruding multiple strands, e.g. for pelletising

Definitions

  • the invention concerns a process for producing reinforced thermoplastic sheets, particularly sheets reinforced with long or continuous fibres.
  • the object of the invention is to provide a process and an apparatus for producing, in less time than s required by traditional processes, reinforced thermoplastic sheets having good characteristics of resistance in every direction
  • the outlet holes of the die plate are eccentric with respect to the axis of the single threads; air jets are provided which influence the outgoing threads; the die plate or the movable means have an oscillatory movement.
  • composition of the sheet provision may be made to add molten plastics at the pressing or calendering stage. Sheets of coating material can also be added.
  • the plastics-coated threads of reinforcement material are prepared by passing the threads of reinforcement material (for example glass fibres) in die plates through which molten plastics is injected and thus surrounds said threads, embedding them in the plastics.
  • reinforcement material for example glass fibres
  • the apparatus for producing reinforced plastic sheets with the process according to the invention comprises a group of die-plates 5. for the production of the individual coated threads, said group being disposed upstream of a movable means for receiving and removing said coated threads, while a pressing and/or sizing means is provided downstream of said movable means.
  • a blower is placed at the exit of at least some of the d e plates, in order to ensure that 10. the threads are arranged at random on the movable means.
  • the disorderly arrangement of the threads can be eased by the fact that the die plate has eccentric outlets with respect to the axis of the single threads produced.
  • the movable means may be a thermostated rotating roller. In this 15. case the same roller can then cooperate with another thermostated roller forming a calendering arrangement.
  • the die plate and/or movable means have an oscillatory movement.
  • the proposed invention provides a material which has a uniform 20. resistance in all directions and which can therefore be pressed like a metallic sheet.
  • Fig. 1 shows a schematic side view of an apparatus for producing reinforced thermoplastic sheets
  • Fig. 2 shows a sectional view of an enlarged detail of the apparatus in figure 1.
  • Figure 1 shows an apparatus comprising a group 5 of die-plates that are connected to an extruder 4. Beneath the group 5 a rotating roller 1 is disposed which is in such a position as to receive, and then transversally move, the mass of plastic-coated threads 10. The roller 1 is adjacent to a second counter-rotating roller 2, which in 10. turn is also adjacent, in a substantially diametrically opposite area, to a third roller 3 rotating in the same direction as roller 1.
  • the group 5 is made up of a series of die-plates 6 of the type illustrated in figure 2. Each die-plate comprises a tubular member 7
  • the tubular member 7 forms a pin 7' that is surrounded by the plastics coming from a frustoconical duct 8. The plastics adhering under pressure to the thread 9 will carry it along with it creating a coated thread 10.
  • the passage 7 ' is slightly eccentric with respect
  • the group 5 produces a whole series of coated threads 10 that are deposited at random on the roller 1 (figure 1).

Landscapes

  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Manufacturing & Machinery (AREA)
  • Chemical & Material Sciences (AREA)
  • Composite Materials (AREA)
  • Reinforced Plastic Materials (AREA)
  • Moulding By Coating Moulds (AREA)

Abstract

The subject of the invention is a process for producing reinforced thermoplastic sheets wherein series of individual plastic-coated threads of reinforcement material are produced and deposited in a disorderly way in mass on a movable means, then the layer of threads (10') thus obtained is pressed or calendered. The apparatus for producing thermoplastic sheets (12) according to the above-mentioned process comprises a group of die-plates (6) that produce individual coated threads (10), a movable means (1) for receiving and transversally moving said coated threads (10) and a pressing and/or rolling means (2, 3) set downstream of said movable means (1). The disorderly arrangement takes place for at least one of the following reasons: the outlet holes of the die-plate are eccentric with respect to the axis of the single threads, water jets (1) are provided which influence the outgoing threads (10), the die-plate and/or the movable means (1) have an oscillatory movement.

Description

"PROCESS FOR PRODUCING REINFORCED THERMOPLASTIC SHEETS AND RELATED APPARATUS"
The invention concerns a process for producing reinforced thermoplastic sheets, particularly sheets reinforced with long or continuous fibres.
At present to produce reinforced thermoplastic sheets both sides of 5. a mat or fabric of more or less orientated or even partially woven fibres are impregnated with a polymer film, then rolled or pressed. In the most widely used plants a continuous press simultaneously melts the polymer, makes the polymer penetrate the mat, sizes the sheet and smoothes its surface. In this type of production, however, 10. problems of mat or fabric permeation by the polymer arise. In order to obtain a sheet with good characteristics the following conditions must be achieved:
- the polymer must soak the fibres;
- the polymer must penetrate between each fibre;
15. - the percentage of micro-gaps due to trapped air must be in the order of a few units;
- high levels of fibre-polymer adhesion must be achieved;
- the mat or fabric must be evenly distributed in the sheet;
- it must be possible to achieve high levels of fibre content in the 20. composite (about 40%);
- the fibres must be able to slide freely during the sheet forming ooerations. From US-A-3 993 726 the production of a reinforced strip is known, made of a plurality of threads impregnated with a polymer which pass through a couple of cooling rollers. The strip produced with such process has an anisotropy.
5. The object of the invention is to provide a process and an apparatus for producing, in less time than s required by traditional processes, reinforced thermoplastic sheets having good characteristics of resistance in every direction
The above object has been achieved with a process m which a series 10. of individual threads of plastic-coated reinforcement material is continuously produced, said threads then being deposited in a disorderly way on a movable means thus forming a layer which will then be calendered or pressed thus obtaining a sheet of reinforced plastic material. The disorderly arrangement takes place for at 15. least one of the following reasons:
the outlet holes of the die plate are eccentric with respect to the axis of the single threads; air jets are provided which influence the outgoing threads; the die plate or the movable means have an oscillatory movement.
20. If required by the composition of the sheet, provision may be made to add molten plastics at the pressing or calendering stage. Sheets of coating material can also be added.
The plastics-coated threads of reinforcement material are prepared by passing the threads of reinforcement material (for example glass fibres) in die plates through which molten plastics is injected and thus surrounds said threads, embedding them in the plastics.
The apparatus for producing reinforced plastic sheets with the process according to the invention comprises a group of die-plates 5. for the production of the individual coated threads, said group being disposed upstream of a movable means for receiving and removing said coated threads, while a pressing and/or sizing means is provided downstream of said movable means. A blower is placed at the exit of at least some of the d e plates, in order to ensure that 10. the threads are arranged at random on the movable means. The disorderly arrangement of the threads can be eased by the fact that the die plate has eccentric outlets with respect to the axis of the single threads produced.
The movable means may be a thermostated rotating roller. In this 15. case the same roller can then cooperate with another thermostated roller forming a calendering arrangement.
Preferably the die plate and/or movable means have an oscillatory movement.
The proposed invention provides a material which has a uniform 20. resistance in all directions and which can therefore be pressed like a metallic sheet.
The process and apparatus according to the invention will now be described on the basis of the attached drawings, in which: Fig. 1 shows a schematic side view of an apparatus for producing reinforced thermoplastic sheets, Fig. 2 shows a sectional view of an enlarged detail of the apparatus in figure 1.
5. Figure 1 shows an apparatus comprising a group 5 of die-plates that are connected to an extruder 4. Beneath the group 5 a rotating roller 1 is disposed which is in such a position as to receive, and then transversally move, the mass of plastic-coated threads 10. The roller 1 is adjacent to a second counter-rotating roller 2, which in 10. turn is also adjacent, in a substantially diametrically opposite area, to a third roller 3 rotating in the same direction as roller 1.
The group 5 is made up of a series of die-plates 6 of the type illustrated in figure 2. Each die-plate comprises a tubular member 7
15. having a passage 7' that can accommodate a bare thread 9. The tubular member 7 forms a pin 7' that is surrounded by the plastics coming from a frustoconical duct 8. The plastics adhering under pressure to the thread 9 will carry it along with it creating a coated thread 10. The passage 7 ' is slightly eccentric with respect
20. to the outlet hole of the die plate. In the drawing this misalignment between the thread being produced and the outgoing thread cannot be seen, as it is very small.
The group 5 produces a whole series of coated threads 10 that are deposited at random on the roller 1 (figure 1). The disorderly
25. arrangement of the coated threads 10 going out of the die-plates 6 is assisted by the presence of blower means 11, set at the exit of said die-plates 6, in order to make the paths of said threads cross. Possibly, in order to emphasize the irregular arrangement of the threads 10 an oscillatory movement of the group 5 and/or the roller 1 can be provided in the plane perpendicular to the sheet. The layer 10' composed of a plurality of threads 10 is pressed and calendered through the pairs of cooperating rollers 1 and 2 and subsequently 2 and 3. By means of this process a reinforced thermoplastic sheet 12 is produced ready for subsequent pressing into the desired shape.

Claims

1. A process for producing reinforced thermoplastic sheets, in which series of individual threads (9) are individually coated, so as to produce coated threads (10), to deposit said coated threads (10) on a movable means (1), so as to form a layer (10') composed of
5. coated threads (10), and then press and/or calender the layer (10') of threads to form a sheet (12), characterized in that the arrangement of the threads takes place in a disorderly way.
2. A process according to claim 1, characterized in that the coated threads of reinforcement material (10) are obtained by
10. passing the threads (10) through a die-plate (6).
3. A process according to claim 1 or 2, characterized m that molten plastics is added at the pressing and/or calendering stage.
4. A process according to any one of claims 1 or 3, characterized in that provision is also made for adding sheet material on one or
15. both outside surfaces of the sheet (12).
5. An apparatus for producing reinforced thermoplastic sheets, comprising a group (5) of die-plates (6) for producing coated threads (10), a movable means (1), for example a rotating roller, to receive said threads (10) and move them transversally and a pressing
20. and/or sizing means (2, 3) downstream of said movable means (1), characterized in that it comprises means to cause a disorderly arrangement of the coated threads.
6. An apparatus according to claim 5, characterized in that the outlets of at least some die plates are eccentric with respect to the axis of the individual threads produced.
7. An apparatus according to claim 5 or 6, characterized in that 5. a blower (11) is placed at the exit of at least some of the die-plates (6) .
8. An apparatus according to any of claims from 5 to 7, characterized in that the die plate and/or the mobile means (1) have an oscillatory movement.
10.
9. An apparatus according to any of claims from 5 to 8, characterized in that the rotating roller (1) collaborates with at least another roller (2) to carry out a calendering operation.
10. An apparatus according to any one of the claims from 5 to 8, characterized in that the rollers (1, 2, 3) are heated and provided 15. with a thermostat.
PCT/IT1988/000080 1987-11-09 1988-11-07 Process for producing reinforced thermoplastic sheets and related apparatus WO1989004247A1 (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
IT22573A/87 1987-11-09
IT22573/87A IT1223090B (en) 1987-11-09 1987-11-09 PROCEDURE FOR PRODUCING REINFORCED THERMOPLASTIC SHEETS AND RELATED EQUIPMENT

Publications (1)

Publication Number Publication Date
WO1989004247A1 true WO1989004247A1 (en) 1989-05-18

Family

ID=11197988

Family Applications (1)

Application Number Title Priority Date Filing Date
PCT/IT1988/000080 WO1989004247A1 (en) 1987-11-09 1988-11-07 Process for producing reinforced thermoplastic sheets and related apparatus

Country Status (4)

Country Link
EP (1) EP0395676A1 (en)
AU (1) AU2626888A (en)
IT (1) IT1223090B (en)
WO (1) WO1989004247A1 (en)

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0373115A1 (en) * 1988-12-09 1990-06-13 Soplar Sa Extrusion head
EP0478258A2 (en) * 1990-09-25 1992-04-01 Sumitomo Rubber Industries Limited Method and apparatus for fabricating a rubberised steel cord reinforced sheet
WO1998027250A2 (en) * 1996-12-17 1998-06-25 Imab Stiftung Reinforced plastic foil
DE10127076A1 (en) * 2001-06-02 2003-03-06 Hartmut Ortlieb Woven or knitted fabric or yarn arrangement consists of plastic-coated threads or yarns useful for special containers or bags

Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB1088931A (en) * 1964-01-10 1967-10-25 Ici Ltd Continuous filament nonwoven materials
LU57487A1 (en) * 1967-12-07 1969-03-13
US3993726A (en) * 1974-01-16 1976-11-23 Hercules Incorporated Methods of making continuous length reinforced plastic articles
FR2443325A1 (en) * 1978-12-04 1980-07-04 Ppg Industries Inc PROCESS FOR OBTAINING A LAMINATED SHEET OF THERMOPLASTIC RESIN REINFORCED WITH GLASS FIBERS
FR2548084A1 (en) * 1983-06-28 1985-01-04 Ato Chimie Process for manufacturing composite articles and composite articles obtained

Patent Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB1088931A (en) * 1964-01-10 1967-10-25 Ici Ltd Continuous filament nonwoven materials
LU57487A1 (en) * 1967-12-07 1969-03-13
US3993726A (en) * 1974-01-16 1976-11-23 Hercules Incorporated Methods of making continuous length reinforced plastic articles
FR2443325A1 (en) * 1978-12-04 1980-07-04 Ppg Industries Inc PROCESS FOR OBTAINING A LAMINATED SHEET OF THERMOPLASTIC RESIN REINFORCED WITH GLASS FIBERS
FR2548084A1 (en) * 1983-06-28 1985-01-04 Ato Chimie Process for manufacturing composite articles and composite articles obtained

Cited By (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0373115A1 (en) * 1988-12-09 1990-06-13 Soplar Sa Extrusion head
EP0478258A2 (en) * 1990-09-25 1992-04-01 Sumitomo Rubber Industries Limited Method and apparatus for fabricating a rubberised steel cord reinforced sheet
EP0478258A3 (en) * 1990-09-25 1992-04-29 Sumitomo Rubber Industries Limited Method and apparatus for fabricating a rubberised steel cord reinforced sheet
US5171502A (en) * 1990-09-25 1992-12-15 Sumitomo Rubber Industries Ltd. Method and apparatus for fabricating a rubberized wire sheet
WO1998027250A2 (en) * 1996-12-17 1998-06-25 Imab Stiftung Reinforced plastic foil
WO1998027250A3 (en) * 1996-12-17 1998-09-03 Imab Stiftung Reinforced plastic foil
DE10127076A1 (en) * 2001-06-02 2003-03-06 Hartmut Ortlieb Woven or knitted fabric or yarn arrangement consists of plastic-coated threads or yarns useful for special containers or bags

Also Published As

Publication number Publication date
EP0395676A1 (en) 1990-11-07
IT8722573A0 (en) 1987-11-09
AU2626888A (en) 1989-06-01
IT1223090B (en) 1990-09-12

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