US20200385898A1 - Fabrics woven by spread tow yarns consisting of polymer matrix composite and method for producing the same - Google Patents
Fabrics woven by spread tow yarns consisting of polymer matrix composite and method for producing the same Download PDFInfo
- Publication number
- US20200385898A1 US20200385898A1 US16/435,715 US201916435715A US2020385898A1 US 20200385898 A1 US20200385898 A1 US 20200385898A1 US 201916435715 A US201916435715 A US 201916435715A US 2020385898 A1 US2020385898 A1 US 2020385898A1
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- United States
- Prior art keywords
- equal
- spread tow
- tow yarns
- spread
- yarns
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- 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.)
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Classifications
-
- D03D15/0088—
-
- D—TEXTILES; PAPER
- D02—YARNS; MECHANICAL FINISHING OF YARNS OR ROPES; WARPING OR BEAMING
- D02J—FINISHING OR DRESSING OF FILAMENTS, YARNS, THREADS, CORDS, ROPES OR THE LIKE
- D02J1/00—Modifying the structure or properties resulting from a particular structure; Modifying, retaining, or restoring the physical form or cross-sectional shape, e.g. by use of dies or squeeze rollers
- D02J1/18—Separating or spreading
-
- D—TEXTILES; PAPER
- D03—WEAVING
- D03D—WOVEN FABRICS; METHODS OF WEAVING; LOOMS
- D03D1/00—Woven fabrics designed to make specified articles
-
- D—TEXTILES; PAPER
- D03—WEAVING
- D03D—WOVEN FABRICS; METHODS OF WEAVING; LOOMS
- D03D15/00—Woven fabrics characterised by the material, structure or properties of the fibres, filaments, yarns, threads or other warp or weft elements used
- D03D15/40—Woven fabrics characterised by the material, structure or properties of the fibres, filaments, yarns, threads or other warp or weft elements used characterised by the structure of the yarns or threads
- D03D15/44—Woven fabrics characterised by the material, structure or properties of the fibres, filaments, yarns, threads or other warp or weft elements used characterised by the structure of the yarns or threads with specific cross-section or surface shape
- D03D15/46—Flat yarns, e.g. tapes or films
-
- D—TEXTILES; PAPER
- D03—WEAVING
- D03D—WOVEN FABRICS; METHODS OF WEAVING; LOOMS
- D03D15/00—Woven fabrics characterised by the material, structure or properties of the fibres, filaments, yarns, threads or other warp or weft elements used
- D03D15/50—Woven fabrics characterised by the material, structure or properties of the fibres, filaments, yarns, threads or other warp or weft elements used characterised by the properties of the yarns or threads
- D03D15/587—Woven fabrics characterised by the material, structure or properties of the fibres, filaments, yarns, threads or other warp or weft elements used characterised by the properties of the yarns or threads adhesive; fusible
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- 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
- D06M15/00—Treating fibres, threads, yarns, fabrics, or fibrous goods made from such materials, with macromolecular compounds; Such treatment combined with mechanical treatment
- D06M15/70—Treating fibres, threads, yarns, fabrics, or fibrous goods made from such materials, with macromolecular compounds; Such treatment combined with mechanical treatment combined with mechanical treatment
- D06M15/71—Cooling; Steaming or heating, e.g. in fluidised beds; with molten metals
-
- D—TEXTILES; PAPER
- D10—INDEXING SCHEME ASSOCIATED WITH SUBLASSES OF SECTION D, RELATING TO TEXTILES
- D10B—INDEXING SCHEME ASSOCIATED WITH SUBLASSES OF SECTION D, RELATING TO TEXTILES
- D10B2505/00—Industrial
- D10B2505/02—Reinforcing materials; Prepregs
Definitions
- the present invention relates to a fabric made of polymer matrix composite, and more particularly to fabrics woven by spread tow yarns consisting of thermoplastic composite and the method for production of the fabrics.
- the conventional spread tow yarns manufactured with prepreg sheets consisting of thermosetting composite has drawbacks as follows. Since the thermosetting composite are sticky at room temperature, the prepreg sheets made of thermosetting composite requires release papers to prevent the thermosetting composite from adhering together. The release papers have to be removed before usage of the prepreg sheets consisting of thermosetting composite. Producing steps thereafter have to be proceeded under low temperature condition to avoid the prepreg sheets from setting. Furthermore, the prepreg sheets consist of thermosetting composite are not sticky after heating and cannot adhere to each other. Additional impregnation and additional plastic have been provided for laminating and compressing. Therefore, the producing process of the conventional spread tow yarns manufactured of the prepreg sheets consisting of thermosetting composite is inconvenient. Moreover, conformance of dimensions of the conventional spread tow yarns manufactured with the prepreg sheets consisting of thermoplastic composite is unstable and cannot satisfy demands of the market.
- the present invention provides a fabric woven by spread tow yarns to mitigate or obviate the aforementioned problems.
- the main objective of the present invention is to provide fabrics woven by spread tow yarns consisting of polymer matrix composite and the method for production of the fabrics to lower fiber areal weight of each spread tow yarns and expand the width of each spread tow yarn.
- FIG. 1 is a cross-sectional side view of a prepreg sheet produced by the method in accordance with the present invention
- FIG. 2 is a block diagram of the method in accordance with the present invention.
- FIG. 3 is schematic diagram showing that a dry prepreg sheet is cut into yarns and the yarns are wound;
- FIG. 4 is a perspective view of a fabric woven by spread tow yarns by the method in accordance with the present invention shown in FIG. 2 ;
- FIG. 5 is a perspective view of another fabric woven by spread tow yarns by the method in accordance with the present invention shown in FIG. 2 .
- a method for producing fabrics woven by spread tow yarns in accordance with the present invention has a tow spreading step S 1 , an impregnation step S 2 , a forming step S 3 , a cutting step S 4 , and a weaving step S 5 .
- Each one of multiple tows has multiple fibers 10 unidirectionally arranged.
- the multiple tows extend through preheated spread bars.
- the spread bars provide the multiple fibers 10 with tension to spread the multiple fibers 10 and expand the width of each tow to a required value.
- the temperature of each one of the spread bars is higher than or equal to 80° C. and is less than or equal to 120° C.
- An angle defined between the horizon and each one of the fibers 10 is larger than or equal to 10° and is less than or equal to 70° .
- the multiple fibers 10 are spread, and each one of the tows turns into a flat tow with unidirectional fibers 10 .
- the impregnation step S 2 multiple tows that have been flattened and expanded are impregnated with matrix 20 to form a prepreg sheet.
- the matrix 20 is thermoplastic resin.
- the viscosity of the matrix 20 that is the thermoplastic resin is larger than or equal to 2000 cPs and is less than or equal to 30000 cPs to provide the matrix 20 with sufficient fluidity.
- the prepreg sheet is heated to let the prepreg sheet dry.
- the prepreg sheet being dry is wound on a bobbin.
- the dry prepreg sheet is cut along the direction of the fibers 10 into multiple spread tow yarns with required width.
- multiple prepreg sheets with different fiber directions are laminated and compressed in advance, and then cut into multiple spread tow yarns shaped as strips.
- the spread tow yarns are weaved according to designs to form a fabric.
- the fabric is heated again for maintaining the pattern of the fabric.
- the fabric is heated to a temperature for maintaining the pattern.
- the temperature is higher than the glass transition temperature (Tg) of the thermoplastic resin.
- FIG. 1 a cross-sectional side view of the prepreg sheet produced by the method in accordance with the present invention is shown via a microscope.
- the white spots are fibers 10 distributed within the matrix 20 .
- Two layers 30 disposed beside the matrix 20 are Epoxy 30 .
- the Epoxy 30 is added for convenience of observation by the microscope.
- the matrix 20 sufficiently permeates the fibers 10 .
- the spread tow yarns are dyed and are perpendicularly weaved to turn into a fabric woven by spread tow yarns made of polymer matrix composite.
- the spread tow yarns are weaved to turn into another fabric woven by spread tow yarns made of polymer matrix composite.
- the fabric produced by the method in accordance with the present invention is weaved by the spread tow yarns.
- Each one of the spread tow yarns consists of multiple fibers 10 and the matrix 20 .
- the multiple fibers 10 are unidirectionally arranged.
- Each one of the multiple fibers 10 may be a carbon fiber, a glass fiber, or other reinforcements.
- the matrix 20 is thermoplastic polymer.
- the fiber areal weight (FAW) of each one of the spread tow yarns is larger than or equal to 70 g/m 2 and is less than or equal to 160 g/m 2 .
- the resin content (RC) of each one of the spread tow yarns is larger than or equal to 30% and is less than or equal to 50% in weight.
- the width of each one of the multiple spread tow yarns reaches 100 cm at most.
- the fiber areal weight (FAW) and the resin content (RC) of each one of the spread tow yarns produced by the method in accordance with the present invention is low and can lower down the thickness of each one of the spread tow yarns and expand the width of each one of the spread tow yarns.
- the spread tow yarn with low fiber areal weight (FAW) and resin content (RC) make the fabric made of polymer matrix composite thinner as well.
- the prepreg sheets consisting of thermosetting composite are sticky at room temperature, the prepreg sheets made of thermosetting composite require release papers to prevent the thermosetting composite from adhering to itself Moreover, the prepreg sheets made of thermosetting composite are difficult to be machined under lower temperature condition.
- the prepreg sheets in accordance with the present invention consisting of thermoplastic composite are dry after heating in the forming step S 3 . Therefore, the prepreg sheets in accordance with the present invention are not sticky and are easy to be cut into strips.
- the cutting step S 4 and the weaving step S 5 are capable of being processed at room temperature to promote the efficiency of production.
- each one of the fibers 10 unidirectionally arranged contacts an adjacent one of the fibers 10 and is blocked by said one of the fibers 10 . Therefore, the widths of the multiple tows are equal.
- the widths and the fiber areal weights of the spread tow yarns and fabrics produced by the method in accordance with the present invention are even.
- the thickness of each one of the spread tow yarns and the fabric made from said spread tow yarns are fully tunable.
- the impregnation step S 2 multiple tows being expanded are impregnated with a thermoplastic polymer to create a thermoplastic composite. Homogeneous impregnation of the fibers 10 is achieved.
- the width of each one of the prepreg sheets in accordance with the present invention reaches 100 cm at most and can be cut into more spread tow yarns shaped as strips.
- the productions of the spread tow yarns and fabric woven by the spread tow yarns are promoted.
- the integrality of fibers 10 are promoted in the cutting step S 4 . Errors in the cutting step S 4 are reduced. Qualities of fabrics woven by spread tow yarns are promoted.
- the method in accordance with the present invention is suitable for conventional apparatus for producing spread tow yarns. Without massively modifying the conventional producing apparatus, the purposes of reducing the fiber areal weight and the resin content of each one of the spread tow yarns are achieved. Consequently, the thickness of the fabric woven by spread tow yarns is reduced and the width of said fabric is expanded.
Landscapes
- Engineering & Computer Science (AREA)
- Textile Engineering (AREA)
- Reinforced Plastic Materials (AREA)
Abstract
A fabric woven by spread tow yarns has multiple spread tow yarns. Each one of the multiple spread tow yarns is made of matrix being thermoplastic polymer and having multiple fibers unidirectionally arranged. The fiber areal weight of each one of the multiple spread tow yarns is larger than or equal to 70 g/m2 and is less than or equal to 160 g/m2; the width of each one of the multiple spread tow yarns is less than or equal to 100 cm; and the resin content of each one of the multiple spread tow yarns is larger than or equal to 30% and is less than or equal to 50%. The widths and the fiber areal weights and the resin content of the spread tow yarns are low and are capable of providing a thin fabric woven by the spread tow yarns.
Description
- The present invention relates to a fabric made of polymer matrix composite, and more particularly to fabrics woven by spread tow yarns consisting of thermoplastic composite and the method for production of the fabrics.
- The conventional spread tow yarns manufactured with prepreg sheets consisting of thermosetting composite has drawbacks as follows. Since the thermosetting composite are sticky at room temperature, the prepreg sheets made of thermosetting composite requires release papers to prevent the thermosetting composite from adhering together. The release papers have to be removed before usage of the prepreg sheets consisting of thermosetting composite. Producing steps thereafter have to be proceeded under low temperature condition to avoid the prepreg sheets from setting. Furthermore, the prepreg sheets consist of thermosetting composite are not sticky after heating and cannot adhere to each other. Additional impregnation and additional plastic have been provided for laminating and compressing. Therefore, the producing process of the conventional spread tow yarns manufactured of the prepreg sheets consisting of thermosetting composite is inconvenient. Moreover, conformance of dimensions of the conventional spread tow yarns manufactured with the prepreg sheets consisting of thermoplastic composite is unstable and cannot satisfy demands of the market.
- To overcome the shortcomings of the fabric woven by conventional spread tow yarns, the present invention provides a fabric woven by spread tow yarns to mitigate or obviate the aforementioned problems.
- The main objective of the present invention is to provide fabrics woven by spread tow yarns consisting of polymer matrix composite and the method for production of the fabrics to lower fiber areal weight of each spread tow yarns and expand the width of each spread tow yarn.
- The fabric woven by spread tow yarns comprises multiple spread tow yarns. Each one of the multiple spread tow yarns is made of a thermoplastic matrix and having multiple fibers unidirectionally arranged. The fiber areal weight of each one of the multiple spread tow yarns is larger than or equal to 70 g/m2 and is less than or equal to 160 g/m2; the width of each one of the multiple spread tow yarns is less than or equal to 100 cm; and the resin content of each one of the multiple spread tow yarns is larger than or equal to 30% and is less than or equal to 50%. The widths and the fiber areal weights and the resin content of the spread tow yarns are low and are capable of providing a thin fabric woven by the spread tow yarns.
- Other objects, advantages, and novel features of the invention will become more apparent from the following detailed description when taken in conjunction with the accompanying drawings.
-
FIG. 1 is a cross-sectional side view of a prepreg sheet produced by the method in accordance with the present invention; -
FIG. 2 is a block diagram of the method in accordance with the present invention; -
FIG. 3 is schematic diagram showing that a dry prepreg sheet is cut into yarns and the yarns are wound; -
FIG. 4 is a perspective view of a fabric woven by spread tow yarns by the method in accordance with the present invention shown inFIG. 2 ; and -
FIG. 5 is a perspective view of another fabric woven by spread tow yarns by the method in accordance with the present invention shown inFIG. 2 . - With reference to
FIG. 2 , a method for producing fabrics woven by spread tow yarns in accordance with the present invention has a tow spreading step S1, an impregnation step S2, a forming step S3, a cutting step S4, and a weaving step S5. - Each one of multiple tows has
multiple fibers 10 unidirectionally arranged. In the tow expanding step S1, the multiple tows extend through preheated spread bars. The spread bars provide themultiple fibers 10 with tension to spread themultiple fibers 10 and expand the width of each tow to a required value. The temperature of each one of the spread bars is higher than or equal to 80° C. and is less than or equal to 120° C. An angle defined between the horizon and each one of thefibers 10 is larger than or equal to 10° and is less than or equal to 70° . Themultiple fibers 10 are spread, and each one of the tows turns into a flat tow withunidirectional fibers 10. - In the impregnation step S2: multiple tows that have been flattened and expanded are impregnated with
matrix 20 to form a prepreg sheet. Thematrix 20 is thermoplastic resin. The viscosity of thematrix 20 that is the thermoplastic resin is larger than or equal to 2000 cPs and is less than or equal to 30000 cPs to provide thematrix 20 with sufficient fluidity. - In the forming step S3: the prepreg sheet is heated to let the prepreg sheet dry. In the forming step S3, the prepreg sheet being dry is wound on a bobbin.
- In the cutting step S4: the dry prepreg sheet is cut along the direction of the
fibers 10 into multiple spread tow yarns with required width. In the cutting step S4, multiple prepreg sheets with different fiber directions are laminated and compressed in advance, and then cut into multiple spread tow yarns shaped as strips. - With reference to
FIG. 3 , the prepreg sheet wound on the bobbin is released for cutting. In the present invention, the width W of eachprepreg sheet 20 reaches 100 cm at most, and the width L of each one of the spread tow yarns reaches 0.5 cm at least. The width L of each one of the spread tow yarns is wider than or equal to 0.5 cm and is thinner than or equal to 100 cm. - In the weaving step S5: the spread tow yarns are weaved according to designs to form a fabric. The fabric is heated again for maintaining the pattern of the fabric. In the weaving step S5, the fabric is heated to a temperature for maintaining the pattern. The temperature is higher than the glass transition temperature (Tg) of the thermoplastic resin.
- With reference to
FIG. 1 , a cross-sectional side view of the prepreg sheet produced by the method in accordance with the present invention is shown via a microscope. The white spots arefibers 10 distributed within thematrix 20. Twolayers 30 disposed beside thematrix 20 are Epoxy 30. The Epoxy 30 is added for convenience of observation by the microscope. InFIG. 1 , thematrix 20 sufficiently permeates thefibers 10. - With reference to
FIG. 4 , the spread tow yarns are dyed and are perpendicularly weaved to turn into a fabric woven by spread tow yarns made of polymer matrix composite. - With reference to
FIG. 5 , the spread tow yarns are weaved to turn into another fabric woven by spread tow yarns made of polymer matrix composite. - The fabric produced by the method in accordance with the present invention is weaved by the spread tow yarns. Each one of the spread tow yarns consists of
multiple fibers 10 and thematrix 20. Themultiple fibers 10 are unidirectionally arranged. Each one of themultiple fibers 10 may be a carbon fiber, a glass fiber, or other reinforcements. Thematrix 20 is thermoplastic polymer. The fiber areal weight (FAW) of each one of the spread tow yarns is larger than or equal to 70 g/m2 and is less than or equal to 160 g/m2. The resin content (RC) of each one of the spread tow yarns is larger than or equal to 30% and is less than or equal to 50% in weight. The width of each one of the multiple spread tow yarns reaches 100 cm at most. - Preferably, the fabric produced by the method in accordance with the present invention has the lowest thickness and the most stable production yield as the fiber areal weight (FAW) of each one of the spread tow yarns is larger than or equal to 70 g/m2 and is less than or equal to 100 g/m2. The resin content (RC) of each one of the spread tow yarns is larger than or equal to 32% and is less than or equal to 47%.
- The fiber areal weight (FAW) and the resin content (RC) of each one of the spread tow yarns produced by the method in accordance with the present invention is low and can lower down the thickness of each one of the spread tow yarns and expand the width of each one of the spread tow yarns. The spread tow yarn with low fiber areal weight (FAW) and resin content (RC) make the fabric made of polymer matrix composite thinner as well.
- Since the prepreg sheets consisting of thermosetting composite are sticky at room temperature, the prepreg sheets made of thermosetting composite require release papers to prevent the thermosetting composite from adhering to itself Moreover, the prepreg sheets made of thermosetting composite are difficult to be machined under lower temperature condition. Compared to the prepreg sheets consisting of thermosetting composite, the prepreg sheets in accordance with the present invention consisting of thermoplastic composite are dry after heating in the forming step S3. Therefore, the prepreg sheets in accordance with the present invention are not sticky and are easy to be cut into strips. The cutting step S4 and the weaving step S5 are capable of being processed at room temperature to promote the efficiency of production.
- In the tow spreading step S1, each one of the
fibers 10 unidirectionally arranged contacts an adjacent one of thefibers 10 and is blocked by said one of thefibers 10. Therefore, the widths of the multiple tows are equal. The widths and the fiber areal weights of the spread tow yarns and fabrics produced by the method in accordance with the present invention are even. The thickness of each one of the spread tow yarns and the fabric made from said spread tow yarns are fully tunable. - In the impregnation step S2, multiple tows being expanded are impregnated with a thermoplastic polymer to create a thermoplastic composite. Homogeneous impregnation of the
fibers 10 is achieved. After improvements mentioned above, the width of each one of the prepreg sheets in accordance with the present invention reaches 100 cm at most and can be cut into more spread tow yarns shaped as strips. The productions of the spread tow yarns and fabric woven by the spread tow yarns are promoted. In addition, the integrality offibers 10 are promoted in the cutting step S4. Errors in the cutting step S4 are reduced. Qualities of fabrics woven by spread tow yarns are promoted. - The method in accordance with the present invention is suitable for conventional apparatus for producing spread tow yarns. Without massively modifying the conventional producing apparatus, the purposes of reducing the fiber areal weight and the resin content of each one of the spread tow yarns are achieved. Consequently, the thickness of the fabric woven by spread tow yarns is reduced and the width of said fabric is expanded.
- Even though numerous characteristics and advantages of the present invention have been set forth in the foregoing description, together with details of the structure and features of the invention, the disclosure is illustrative only. Changes may be made in the details, especially in matters of shape, size, and arrangement of parts within the principles of the invention to the full extent indicated by the broad general meaning of the terms in which the appended claims are expressed.
Claims (8)
1. A fabric woven by spread tow yarns comprising:
multiple spread tow yarns, each one of the multiple spread tow yarns having
a matrix being thermoplastic polymer; and
multiple fibers unidirectionally arranged within the matrix, wherein
the fiber areal weight of each one of the multiple spread tow yarns is larger than or equal to 70 g/m2 and is less than or equal to 160 g/m2;
the width of each one of the multiple spread tow yarns is thinner than or equal to 100 cm; and
the resin content of each one of the multiple spread tow yarns is larger than or equal to 30% and is less than or equal to 50%.
2. The fabric woven by spread tow yarns as claimed in claim 1 , wherein
the fiber areal weight of each one of the multiple tow yarns is larger than or equal to 70 g/m2 and is less than or equal to 100 g/m2.
3. The fabric woven by spread tow yarns as claimed in claim 1 , wherein the resin content is larger than or equal to 32% and is less than or equal to 47%.
4. A method for producing the fabric woven by spread tow yarns as claimed in claim 1 comprising:
a tow expanding step: extending multiple tows composed of multiple fibers unidirectionally arranged through preheated spread bars to spread the multiple fibers and to expand the tows;
an impregnation step: impregnating the multiple tows with thermoplastic resin to form a prepreg sheet; wherein the viscosity of the thermoplastic resin is larger than or equal to 2000 cPs and is less than or equal to 30000 cPs;
a forming step: heating the prepreg sheet to dry the prepreg sheet and let the prepreg set;
a cutting step: cutting the dry prepreg sheet along the direction of the multiple fibers of each tow of the prepreg sheet and turning the prepreg sheet into multiple spread tow yarns; wherein each one of the multiple spread tow yarns is shaped as a strip; and
a weaving step: weaving the spread tow yarns to form a fabric and heating the fabric to accomplish the fabric woven by spread tow yarns.
5. The method for producing the fabric woven by spread tow yarns as claimed in claim 4 , wherein the temperature of each one of the spread bars is higher than or equal to 80° C. and is less than or equal to 120° C.
6. The method for producing the fabric woven by spread tow yarns as claimed in claim 4 , wherein an angle defined between the horizon and each one of the multiple fibers is larger than or equal to 10° and is less than or equal to 70° .
7. The method for producing the fabric woven by spread tow yarns as claimed in claim 4 , wherein multiple dry prepreg sheets with different fiber directions are laminated and compressed before being cut into multiple spread tow yarns shaped as strips in the cutting step.
8. The method for producing the fabric woven by spread tow yarns as claimed in claim 4 , wherein a heating temperature in the weaving step is higher than the glass transition temperature of the thermoplastic resin.
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US16/435,715 US20200385898A1 (en) | 2019-06-10 | 2019-06-10 | Fabrics woven by spread tow yarns consisting of polymer matrix composite and method for producing the same |
Applications Claiming Priority (1)
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US16/435,715 US20200385898A1 (en) | 2019-06-10 | 2019-06-10 | Fabrics woven by spread tow yarns consisting of polymer matrix composite and method for producing the same |
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US20200385898A1 true US20200385898A1 (en) | 2020-12-10 |
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US16/435,715 Abandoned US20200385898A1 (en) | 2019-06-10 | 2019-06-10 | Fabrics woven by spread tow yarns consisting of polymer matrix composite and method for producing the same |
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Cited By (3)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US20220235499A1 (en) * | 2019-04-10 | 2022-07-28 | Textilma Ag | Method for Producing Cold Cut Textile Webs |
US20230087214A1 (en) * | 2021-09-22 | 2023-03-23 | Hao-Chia WU | Method for splitting carbon fiber tow |
EP4206372A1 (en) * | 2021-12-20 | 2023-07-05 | Raytheon Technologies Corporation | Ribbonized tows for optimized improved composite performance |
-
2019
- 2019-06-10 US US16/435,715 patent/US20200385898A1/en not_active Abandoned
Cited By (5)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US20220235499A1 (en) * | 2019-04-10 | 2022-07-28 | Textilma Ag | Method for Producing Cold Cut Textile Webs |
US11932974B2 (en) * | 2019-04-10 | 2024-03-19 | Textilma Ag | Method for producing cold cut textile webs |
US20230087214A1 (en) * | 2021-09-22 | 2023-03-23 | Hao-Chia WU | Method for splitting carbon fiber tow |
EP4206372A1 (en) * | 2021-12-20 | 2023-07-05 | Raytheon Technologies Corporation | Ribbonized tows for optimized improved composite performance |
US12017379B2 (en) | 2021-12-20 | 2024-06-25 | Rtx Corporation | Ribbonized tows for optimized improved composite performance |
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