US3045319A - Resin molded fabric - Google Patents

Resin molded fabric Download PDF

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Publication number
US3045319A
US3045319A US84914A US8491461A US3045319A US 3045319 A US3045319 A US 3045319A US 84914 A US84914 A US 84914A US 8491461 A US8491461 A US 8491461A US 3045319 A US3045319 A US 3045319A
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United States
Prior art keywords
fabric
yarns
tie
plies
areas
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Expired - Lifetime
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US84914A
Inventor
Henry A Scheel
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Wimpfheimer A and Bros Inc
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Wimpfheimer A and Bros Inc
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Priority to US84914A priority Critical patent/US3045319A/en
Priority to GB2031/62A priority patent/GB990554A/en
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    • 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
    • B29C53/00—Shaping by bending, folding, twisting, straightening or flattening; Apparatus therefor
    • B29C53/02—Bending or folding
    • B29C53/04—Bending or folding of plates or sheets
    • B29C53/06—Forming folding lines by pressing or scoring
    • B29C53/063—Forming folding lines by pressing or scoring combined with folding
    • 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
    • B29C70/06—Fibrous reinforcements only
    • B29C70/08—Fibrous reinforcements only comprising combinations of different forms of fibrous reinforcements incorporated in matrix material, forming one or more layers, and with or without non-reinforced layers
    • B29C70/083—Combinations of continuous fibres or fibrous profiled structures oriented in one direction and reinforcements forming a two dimensional structure, e.g. mats
    • 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
    • B29C70/06—Fibrous reinforcements only
    • B29C70/10—Fibrous reinforcements only characterised by the structure of fibrous reinforcements, e.g. hollow fibres
    • B29C70/16—Fibrous reinforcements only characterised by the structure of fibrous reinforcements, e.g. hollow fibres using fibres of substantial or continuous length
    • B29C70/24—Fibrous reinforcements only characterised by the structure of fibrous reinforcements, e.g. hollow fibres using fibres of substantial or continuous length oriented in at least three directions forming a three dimensional structure
    • 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
    • B29C37/00—Component parts, details, accessories or auxiliary operations, not covered by group B29C33/00 or B29C35/00
    • B29C37/0053—Moulding articles characterised by the shape of the surface, e.g. ribs, high polish
    • B29C37/0057—Moulding single grooves or ribs, e.g. tear lines
    • 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
    • Y10T428/24—Structurally defined web or sheet [e.g., overall dimension, etc.]
    • Y10T428/24132—Structurally defined web or sheet [e.g., overall dimension, etc.] including grain, strips, or filamentary elements in different layers or components parallel
    • 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
    • Y10T428/24—Structurally defined web or sheet [e.g., overall dimension, etc.]
    • Y10T428/24628—Nonplanar uniform thickness material
    • Y10T428/24636—Embodying mechanically interengaged strand[s], strand-portion[s] or strand-like strip[s] [e.g., weave, knit, etc.]
    • Y10T428/24645—Embodying mechanically interengaged strand[s], strand-portion[s] or strand-like strip[s] [e.g., weave, knit, etc.] with folds in parallel planes
    • 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
    • Y10T442/00—Fabric [woven, knitted, or nonwoven textile or cloth, etc.]
    • Y10T442/30—Woven fabric [i.e., woven strand or strip material]
    • Y10T442/3179—Woven fabric is characterized by a particular or differential weave other than fabric in which the strand denier or warp/weft pick count is specified
    • Y10T442/3301—Coated, impregnated, or autogenous bonded

Definitions

  • An object of the invention is to provide a fabric of the above type which is capable of being impregnated with a substantial amount of impregnant.
  • Another object is to provide an impregnated fabric which is resistant to heat and corrosion.
  • a further object is to provide an impregnated fabric which is readily fabricated into various shapes and sizes.
  • a two-ply fabric is woven on a standard double shuttle loom to form a fabric having a pair of woven plies which in certain areas are spaced apart and joined by tie yarns which extend between the two plies to form a filling. In other selected areas the two plies are contiguous and are bound together by binder yarns. These latter areas may constitute spaced stripes in the warpwise direction or in the fillerwise direction or in both directions as desired.
  • straight stuffer yarns can be woven in spaced parallel groups along the tie areas.
  • These stufler yarns can be made of wicking material for absorbing and wicking the impregnant along the fabric. This feature is of particular importance if the fabric is made of non-pervio-us' yarns such as spun or continuous filament glass yarns which do not in them-selves absorb the i-mpregnant.
  • FIG. 1 is a broken plan view of a fabric embodying the invention
  • FIG. 2 is a warpwise section taken on the line 22 of FIG. 1;
  • FIG. 3 is a warpwise section taken on the line 3-3 of FIG. 1;
  • FIG. 4 is partial perspective of a duct composed of the fabric of FIG. 1.
  • the invention is shown as embodied in a fabric having a pair of plies 10, each composed of weft yarns 11 and warp yarns 12 interwoven in the usual manner.
  • Tie warps 13 are crosswoven between the two plies 10, as shown in FIG. 2.
  • the tie yarns 13 are woven over alternate weft yarns 11 of the upper ply 10, then cross to the lower ply to pass under alternate weft yarns 11 of the lower ply and return in a repeated pattern.
  • the tie yarns may of course be woven under and over three or more weft yarns 11 of each ply before crossing to the other ply if desired, in which case successive picks of the tie yarns will be offset by one or more weft yarns so as to provide a uniform distribution through the fabric.
  • the yarns 13 form a tie between the two outer plies in a manner well known in double shuttle velvet weaving.
  • Binder Warp yarns 14 are woven in a manner similar to the tie yarns 13 except that the binder warps are placed under a tension adapted to bring the two plies 111 into juxtaposition so that no substantial space is formed between the two plies in the areas of the binder yarns 14.
  • the binder yarns :14 are disposed in stripes 15 which are spaced across the fabric to provide panels 16 therebetween containing the tie yarns 13.
  • the stripes 15 form in effect a selvage along the edges of the fabric and a binding for the panels 16.
  • the tie yarn areas 16 are enclosed thereby and the edges of the fabric do not tend to fray or ravel.
  • transverse stripes corresponding to the warpwise stripes 15 can be woven in the fabric by varying the tension of the tie warp 13 at the selected areas so that the outer plies 10 are pulled together at such areas. In this way provision can be made for cutting the fabric transversely at various intervals.
  • a plurality of stuifer yarns 17 are shown as laid in spaced parallel relationship between selected ,tie yarns 13.
  • the stuffer yarns are laid in channels where the tie yarns 13 are omitted and are not bound into the fabric.
  • the fabric either before or after cutting to size is impregnated with an impregnating resin such as a phenolic condensation resin or an epoxy resin or other resin having thermosetting properties, or by a thermoplastic type resin such as polyethylene or a vinyl resin depending upon the end use to which the fabric is to be put.
  • an impregnating resin such as a phenolic condensation resin or an epoxy resin or other resin having thermosetting properties
  • a thermoplastic type resin such as polyethylene or a vinyl resin depending upon the end use to which the fabric is to be put.
  • a thermosetting resin the impregnated fabric can be dried but not cured as a preliminary step after which it can be molded to shape and cured to form a rigid product which cannot again be softened by heat. If thermoplastic resins are used the fabric will be molded to form prior to curing but can be resoftened by heat.
  • the fabric is preferably made of a spun glass yarn or the like throughout with the exception of the stufier yarns 17 which are composed of a wicking or absorptive material such as cotton. These stufier yarns thus aid the penetration of the impregnant. These yarns may extend either w arpwise or weft-wise ac cording to the product desired.
  • FIG. 4 As an example of one type of end product a square duct 20 is shown in FIG. 4. This duct is formed by bending the fabric along the stripes 15 to form the corners with the two side edges overlapping and bonded together by the cured resin. The conduit must be shaped before the final heat curing of the resin.
  • a two-ply fabric comprising a pair of plies of woven fabric, each of said plies having interwoven filler yarns and warp yarns, said plies in certain areas being spaced apart and having tie yarns woven into and extending between the plies and in other areas being in substantial contact and having binder yarns extending between the plies to bind the same together, said tie yarns being disposed to leave a straight open channel extending entirely through the tie yarn areas and stuifer material having wicking characteristics, disposed in and extending along said channels, said stuiier material being free from said tie yarns.
  • a two-ply fabric as set forth in claim 1 which is impregnated with a thermosetting resin, said resin being in the heat set and cured state, said impregnated fabric constituting a rigid product.
  • a resin impregnated fabric element comprising a 0 pair of plies of woven fabric, each of said plies having interwoven filler yarns and Warp yarns, said plies in certain areas being spaced apart and having tie yarns woven into and extend-ingbetween the plies, said plies in other areas being in substantial contact and having binder yarns extending between the plies to bind the same together, said other areas constituting warpwise stripes extending in spaced parallel relationship in a warpwise direction along said fabric, said tie yarn areas constituting panels between adjacent warpwise stripes, said tie yarns being disposed to leave straight open channels extending entirely through the tie areas, and wicking material dis- (3. posed in and extending along said channels, said fabric the space between said plies in the tie yarn areas and said wicking material being impregnated with a thermosetting resin, said fabric being folded along said stripes 5 and said resin being in the heat set and cured state.

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  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Chemical & Material Sciences (AREA)
  • Composite Materials (AREA)
  • Textile Engineering (AREA)
  • Woven Fabrics (AREA)

Description

9 R H O m 5 E o 4 vc w 7 fm Y n R m 2 r 1 l '1 l "1- I I ff H A SCHEEL RESIN MOLDED FABRIC Filed Jan. 25, 1961 (w a u United States Patent 3,045,319 RESIN MOLDED FABRIC Henry A. Scheel, Mystic, Conn, assignor to A. Wimpfheimer & Bro. Inc., Stonington, Conm, a corporation of New York Filed Jan. 25, 1961, Ser. No. 84,914 4 Claims. (Cl. 2880) This inventon relates to fabrics of the type suited to be resin impregnated and molded to form a structural member, insulation board, duct, or the like.
An object of the invention is to provide a fabric of the above type which is capable of being impregnated with a substantial amount of impregnant.
Another object is to provide an impregnated fabric which is resistant to heat and corrosion.
A further object is to provide an impregnated fabric which is readily fabricated into various shapes and sizes.
Other objects and advantages will be apparent as the nature of the invention is more fully disclosed.
In accordance with the invention a two-ply fabric is woven on a standard double shuttle loom to form a fabric having a pair of woven plies which in certain areas are spaced apart and joined by tie yarns which extend between the two plies to form a filling. In other selected areas the two plies are contiguous and are bound together by binder yarns. These latter areas may constitute spaced stripes in the warpwise direction or in the fillerwise direction or in both directions as desired. After the fabric has been thus woven in a sheet or strip it can be cut into various shapes along the stripe areas without exposing the tie areas and Without ravelling. The fabric can be impregnated either before or after such cutting or trimmmg.
To facilitate the penetration of the irnpregnant, particularly when long lengths of the fabric are to be impregnated, straight stuffer yarns can be woven in spaced parallel groups along the tie areas. These stufler yarns can be made of wicking material for absorbing and wicking the impregnant along the fabric. This feature is of particular importance if the fabric is made of non-pervio-us' yarns such as spun or continuous filament glass yarns which do not in them-selves absorb the i-mpregnant.
The nature of the invention will be better understood from the following description, taken in connection with the accompanying drawing in which a specific embodiment has been shown for purposes of illustration.
In the drawings:
FIG. 1 is a broken plan view of a fabric embodying the invention;
FIG. 2 is a warpwise section taken on the line 22 of FIG. 1;
FIG. 3 is a warpwise section taken on the line 3-3 of FIG. 1; and
FIG. 4 is partial perspective of a duct composed of the fabric of FIG. 1.
Referring to the drawing more in detail the invention is shown as embodied in a fabric having a pair of plies 10, each composed of weft yarns 11 and warp yarns 12 interwoven in the usual manner. Tie warps 13 are crosswoven between the two plies 10, as shown in FIG. 2. The tie yarns 13 are woven over alternate weft yarns 11 of the upper ply 10, then cross to the lower ply to pass under alternate weft yarns 11 of the lower ply and return in a repeated pattern. The tie yarns may of course be woven under and over three or more weft yarns 11 of each ply before crossing to the other ply if desired, in which case successive picks of the tie yarns will be offset by one or more weft yarns so as to provide a uniform distribution through the fabric. The yarns 13 form a tie between the two outer plies in a manner well known in double shuttle velvet weaving.
Binder Warp yarns 14 are woven in a manner similar to the tie yarns 13 except that the binder warps are placed under a tension adapted to bring the two plies 111 into juxtaposition so that no substantial space is formed between the two plies in the areas of the binder yarns 14. In the form shown the binder yarns :14 are disposed in stripes 15 which are spaced across the fabric to provide panels 16 therebetween containing the tie yarns 13.
The stripes 15 form in effect a selvage along the edges of the fabric and a binding for the panels 16. When the fabric is out along these stripes 15 the tie yarn areas 16 are enclosed thereby and the edges of the fabric do not tend to fray or ravel.
If desired, transverse stripes corresponding to the warpwise stripes 15 can be woven in the fabric by varying the tension of the tie warp 13 at the selected areas so that the outer plies 10 are pulled together at such areas. In this way provision can be made for cutting the fabric transversely at various intervals.
A plurality of stuifer yarns 17 are shown as laid in spaced parallel relationship between selected ,tie yarns 13. The stuffer yarns are laid in channels where the tie yarns 13 are omitted and are not bound into the fabric.
The fabric, either before or after cutting to size is impregnated with an impregnating resin such as a phenolic condensation resin or an epoxy resin or other resin having thermosetting properties, or by a thermoplastic type resin such as polyethylene or a vinyl resin depending upon the end use to which the fabric is to be put. In the case of a thermosetting resin the impregnated fabric can be dried but not cured as a preliminary step after which it can be molded to shape and cured to form a rigid product which cannot again be softened by heat. If thermoplastic resins are used the fabric will be molded to form prior to curing but can be resoftened by heat.
For a structural unit or for a duct which is moldable to a complex form and is resistant to moderately high temperatures and to corrosion the fabric is preferably made of a spun glass yarn or the like throughout with the exception of the stufier yarns 17 which are composed of a wicking or absorptive material such as cotton. These stufier yarns thus aid the penetration of the impregnant. These yarns may extend either w arpwise or weft-wise ac cording to the product desired.
As an example of one type of end product a square duct 20 is shown in FIG. 4. This duct is formed by bending the fabric along the stripes 15 to form the corners with the two side edges overlapping and bonded together by the cured resin. The conduit must be shaped before the final heat curing of the resin.
Various other adaptations and uses of the invention will be apparent to a person skilled in the art.
What is claimed is:
1. A two-ply fabric comprising a pair of plies of woven fabric, each of said plies having interwoven filler yarns and warp yarns, said plies in certain areas being spaced apart and having tie yarns woven into and extending between the plies and in other areas being in substantial contact and having binder yarns extending between the plies to bind the same together, said tie yarns being disposed to leave a straight open channel extending entirely through the tie yarn areas and stuifer material having wicking characteristics, disposed in and extending along said channels, said stuiier material being free from said tie yarns.
2. A two-ply fabric as set forth in claim 1 which is impregnated with a thermosetting resin, said resin being in the heat set and cured state, said impregnated fabric constituting a rigid product.
3. A two-ply fabric as set forth in claim 1 in which said stuflier material constitutes yarns.
4. A resin impregnated fabric element comprising a 0 pair of plies of woven fabric, each of said plies having interwoven filler yarns and Warp yarns, said plies in certain areas being spaced apart and having tie yarns woven into and extend-ingbetween the plies, said plies in other areas being in substantial contact and having binder yarns extending between the plies to bind the same together, said other areas constituting warpwise stripes extending in spaced parallel relationship in a warpwise direction along said fabric, said tie yarn areas constituting panels between adjacent warpwise stripes, said tie yarns being disposed to leave straight open channels extending entirely through the tie areas, and wicking material dis- (3. posed in and extending along said channels, said fabric the space between said plies in the tie yarn areas and said wicking material being impregnated with a thermosetting resin, said fabric being folded along said stripes 5 and said resin being in the heat set and cured state.
References Cited in the file of this patent UNITED STATES PATENTS 10 2,167,350 Eaton July 25, 1939 2,502,101 Morgan et al. Mar. 28, 1950 2,948,950 Finger et al. Aug. 16, 1960
US84914A 1961-01-25 1961-01-25 Resin molded fabric Expired - Lifetime US3045319A (en)

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US84914A US3045319A (en) 1961-01-25 1961-01-25 Resin molded fabric
GB2031/62A GB990554A (en) 1961-01-25 1962-01-19 A resin-impregnated fabric product

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Cited By (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3993817A (en) * 1974-01-04 1976-11-23 General Electric Company Orthogonally woven reinforcing structure
US4557779A (en) * 1980-10-01 1985-12-10 Champion International Corporation Method of forming an embossing caul
EP0243105A1 (en) * 1986-04-18 1987-10-28 Courtaulds Plc Composite element and reinforcement therefor
US4748996A (en) * 1987-02-06 1988-06-07 J. B. Martin Company Woven multilayered textile fabrics and attendant method of making
US4854352A (en) * 1987-02-06 1989-08-08 J. B. Martin Company Textile fabrics having a plurality of warp and filling layers and attendant method of making
EP0449033A2 (en) * 1990-03-26 1991-10-02 Metalleido S.R.L. Process for the manufacture of sandwich structures
WO1992021511A1 (en) * 1991-05-29 1992-12-10 Metalleido S.R.L. Method for the production of a composite structure with an intermediate three-dimensional textile, and a structure made by the method
US5534318A (en) * 1991-03-18 1996-07-09 Parabeam Industrie-En Handelsonderneming B.V. Hollow fiber-reinforced plastic body

Families Citing this family (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE3742400A1 (en) * 1987-12-15 1989-07-06 Mehler Vario System Gmbh SANDWICH LIGHTWEIGHT MATERIAL AND METHOD FOR THE PRODUCTION THEREOF
US4885973A (en) * 1988-12-14 1989-12-12 Airfoil Textron Inc. Method of making composite articles
GB9212697D0 (en) * 1992-06-15 1992-07-29 Short Brothers Plc Composite structure manufacture

Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2167350A (en) * 1936-05-22 1939-07-25 Eaton Frank Wearing apparel
US2502101A (en) * 1949-03-02 1950-03-28 Woonsocket Falls Mill Fabric and method of making same
US2948950A (en) * 1953-07-21 1960-08-16 Lof Glass Fibers Co Reinforced translucent panel

Patent Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2167350A (en) * 1936-05-22 1939-07-25 Eaton Frank Wearing apparel
US2502101A (en) * 1949-03-02 1950-03-28 Woonsocket Falls Mill Fabric and method of making same
US2948950A (en) * 1953-07-21 1960-08-16 Lof Glass Fibers Co Reinforced translucent panel

Cited By (12)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3993817A (en) * 1974-01-04 1976-11-23 General Electric Company Orthogonally woven reinforcing structure
US4557779A (en) * 1980-10-01 1985-12-10 Champion International Corporation Method of forming an embossing caul
EP0243105A1 (en) * 1986-04-18 1987-10-28 Courtaulds Plc Composite element and reinforcement therefor
GB2189266B (en) * 1986-04-18 1990-06-20 Courtaulds Plc Composite element and reinforcement therefor
US4748996A (en) * 1987-02-06 1988-06-07 J. B. Martin Company Woven multilayered textile fabrics and attendant method of making
US4854352A (en) * 1987-02-06 1989-08-08 J. B. Martin Company Textile fabrics having a plurality of warp and filling layers and attendant method of making
EP0449033A2 (en) * 1990-03-26 1991-10-02 Metalleido S.R.L. Process for the manufacture of sandwich structures
EP0449033A3 (en) * 1990-03-26 1992-05-06 Metalleido S.R.L. Process for the manufacture of sandwich structures
US5534318A (en) * 1991-03-18 1996-07-09 Parabeam Industrie-En Handelsonderneming B.V. Hollow fiber-reinforced plastic body
US5763035A (en) * 1991-03-18 1998-06-09 Parabeam Industrie-En Handelsonderneming B.V. Hollow fibre-reinforced plastic body
WO1992021511A1 (en) * 1991-05-29 1992-12-10 Metalleido S.R.L. Method for the production of a composite structure with an intermediate three-dimensional textile, and a structure made by the method
US5580412A (en) * 1991-05-29 1996-12-03 Metalleido S.R.L. Apparatus and method for the production of a composite structure with an intermediate three-dimensional textile

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