CN102235057B - A kind of FRP muscle - Google Patents
A kind of FRP muscle Download PDFInfo
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- CN102235057B CN102235057B CN201010169644.5A CN201010169644A CN102235057B CN 102235057 B CN102235057 B CN 102235057B CN 201010169644 A CN201010169644 A CN 201010169644A CN 102235057 B CN102235057 B CN 102235057B
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- frp muscle
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- 210000003205 muscle Anatomy 0.000 title claims abstract description 118
- 239000000835 fiber Substances 0.000 claims abstract description 81
- 229920005992 thermoplastic resin Polymers 0.000 claims abstract description 34
- 239000012783 reinforcing fiber Substances 0.000 claims abstract description 17
- 238000001035 drying Methods 0.000 claims description 25
- 238000007493 shaping process Methods 0.000 claims description 21
- 229920000728 polyester Polymers 0.000 claims description 15
- 238000000465 moulding Methods 0.000 claims description 12
- 239000004743 Polypropylene Substances 0.000 claims description 11
- -1 polypropylene Polymers 0.000 claims description 10
- 229920001155 polypropylene Polymers 0.000 claims description 10
- 239000003365 glass fiber Substances 0.000 claims description 9
- 238000001816 cooling Methods 0.000 claims description 8
- 230000004048 modification Effects 0.000 claims description 6
- 238000012986 modification Methods 0.000 claims description 6
- 229920001169 thermoplastic Polymers 0.000 claims description 6
- 229920000049 Carbon (fiber) Polymers 0.000 claims description 5
- 239000004594 Masterbatch (MB) Substances 0.000 claims description 5
- 239000004917 carbon fiber Substances 0.000 claims description 5
- 239000004973 liquid crystal related substance Substances 0.000 claims description 5
- VNWKTOKETHGBQD-UHFFFAOYSA-N methane Chemical compound C VNWKTOKETHGBQD-UHFFFAOYSA-N 0.000 claims description 5
- 229920000642 polymer Polymers 0.000 claims description 5
- 229920006324 polyoxymethylene Polymers 0.000 claims description 5
- 239000004416 thermosoftening plastic Substances 0.000 claims description 5
- 229920002748 Basalt fiber Polymers 0.000 claims description 3
- 238000004804 winding Methods 0.000 claims description 3
- 238000005260 corrosion Methods 0.000 abstract description 7
- 230000007797 corrosion Effects 0.000 abstract description 7
- 238000005516 engineering process Methods 0.000 abstract description 7
- 238000000034 method Methods 0.000 description 10
- 239000002994 raw material Substances 0.000 description 10
- 238000002360 preparation method Methods 0.000 description 9
- 229920005989 resin Polymers 0.000 description 9
- 239000011347 resin Substances 0.000 description 9
- 238000004519 manufacturing process Methods 0.000 description 7
- 238000002844 melting Methods 0.000 description 7
- 230000008018 melting Effects 0.000 description 7
- 239000007788 liquid Substances 0.000 description 6
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 5
- 238000004321 preservation Methods 0.000 description 4
- 238000001291 vacuum drying Methods 0.000 description 4
- 229920001187 thermosetting polymer Polymers 0.000 description 2
- 239000004952 Polyamide Substances 0.000 description 1
- 229920004933 Terylene® Polymers 0.000 description 1
- 230000015556 catabolic process Effects 0.000 description 1
- 238000006731 degradation reaction Methods 0.000 description 1
- 238000009792 diffusion process Methods 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 229920003247 engineering thermoplastic Polymers 0.000 description 1
- 238000000227 grinding Methods 0.000 description 1
- 238000005470 impregnation Methods 0.000 description 1
- 230000014759 maintenance of location Effects 0.000 description 1
- 239000000463 material Substances 0.000 description 1
- 229920001778 nylon Polymers 0.000 description 1
- 229920002647 polyamide Polymers 0.000 description 1
- 239000005020 polyethylene terephthalate Substances 0.000 description 1
- 239000011435 rock Substances 0.000 description 1
- 239000002689 soil Substances 0.000 description 1
- 238000007711 solidification Methods 0.000 description 1
- 230000008023 solidification Effects 0.000 description 1
Landscapes
- Reinforced Plastic Materials (AREA)
Abstract
The invention discloses a kind of FRP muscle, solve that FRP muscle corrosion resistance of the prior art is weak, toughness is low, the technical problem of poor mechanical property, endurance quality difference, the present invention for solving the problems of the technologies described above taked technical scheme is: undertaken intersecting by thermoplastic resin fibre and inorganic reinforcing fiber, the even arrangement at interval makes.Adopt the FRP muscle that technical scheme of the present invention is made, be the FRP muscle that a kind of corrosion resistance is strong, toughness strong, mechanical property is better, can be applied in rapidly in all kinds of engineering widely.
Description
Technical field
The present invention relates to a kind of constructional materials for civil engineering, particularly relate to a kind of FRP muscle of engineering.
Background technology
The member system structure that FRP muscle is reinforced as a kind of Rock And Soil of civil engineering, there is large market and using value, be related to the country and people's security of the lives and property, so product must have the advantage of high strength, corrosion-resistant, easy-formation and low cost, could effectively be applied in civil engineering.
Existing FRP muscle moulding process comprises operations such as sending the winding of yarn, impregnation, monofilament, precuring, curing molding, drawing-off, cut-out, the general resin adopted is thermosetting resin, the shortcoming of this moulding process is to exist in forming process that body of rod spillage, body of rod surface are uneven, FRP muscle cannot post forming, the shortcoming such as corrosion resistance is low, FRP muscle toughness is low, have influence on the mechanical property of FRP muscle, endurance quality and usage safety performance.
Chinese invention patent application Publication Specification discloses name and is called a kind of full-thread fiber-reinforced thermoplastic plastics anchor bar and processing technology thereof, publication date is on July 15th, 2009, publication number is the application for a patent for invention of CN101482024A, the forming method of the FRP muscle that this patent application is introduced adopts infuse thermoplastic resins's technique, thermoplastic resin generally needs higher melt temperature (> 180 DEG C) just can reach liquid condition, high and continuous seepage needs long molten resin to need a large amount of energy to the requirement of equipment, improve cost of production, and resin is in high temperature fused state for a long time and can there is serious degraded, cause resin property significantly to reduce, finally have influence on the performance of FRP muscle.
Certain improvement to be carried out to improve the functional performance of FRP muscle to the production technology of existing FRP muscle for solving problems of the prior art, thus effectively ensure quality and the people life property safety of China's civil engineering.
Summary of the invention
In order to solve in prior art, FRP muscle corrosion resistance is weak, toughness is low, the technical problem of poor mechanical property, endurance quality difference in the present invention, and provides the FRP muscle that a kind of corrosion resistance is strong, toughness strong, mechanical property is better.
In order to solve the problems of the technologies described above, the present invention mainly takes following technical scheme.
A kind of FRP muscle, is undertaken intersecting by thermoplastic resin fibre and inorganic reinforcing fiber, the even boundling at interval forms;
This FRP muscle surface has the helicitic texture be entwined by monfil.
Further, monfil is the fiber of polyester fiber, polypropylene fibre, Fypro, polyformaldehyde fibre, liquid crystal high polymers fiber or functional master batch modification.
Further, described thermoplastic resin fibre is the fiber of polyester fiber, polypropylene fibre, Fypro, polyformaldehyde fibre, liquid crystal high polymers fiber or functional master batch modification; Described inorganic reinforcing fiber is glass fiber, basalt fibre or carbon fiber.
As preferred version of the present invention, FRP muscle is triangle, circle, W shape or M shape.
Adopt technical scheme of the present invention, there is following technique effect:
The resin raw material that the present invention uses is thermoplastic resin, and thermoplastic resin molded technique is simple, easy to control, function admirable, and secondary operations can become different shapes, meets the requirement of different engineering to FRP muscle shape; The resin raw material used in the present invention is threadiness, and form the FRP muscle body of rod with the common boundling of inorfil, the kind of thermoplastic fibre, content can be changed so flexibly to reach the performance requirement of different engineering, as requirements such as anti-flammability, durability, heat-resisting quantities; The FRP muscle that the present invention adopts thermoplastic resin fibre's raw material to prepare, effectively can improve the shortcoming that toughness is not enough, fracture resistance is not enough of FRP muscle; Continuous high temperature melting and solidification, molding production process is adopted in the process of preparation, even and inorganic high-strength fibres bond after thermoplastic resin fibre's melting, resin high temperature degradation rate is low, property retention rate is high, and FRP muscle properties of product are excellent, meets various engineering to FRP muscle performance requirement; The preparation technology of thermoplastic resin FRP muscle prepared by the present invention is simple, R&D costs are low, cost of production is low, can be applied in rapidly in Practical Project widely.
Accompanying drawing explanation
Fig. 1 is by the sectional view of FRP muscle provided by the invention.
Detailed description of the invention
Below in conjunction with drawings and Examples, technical scheme of the present invention is described in detail.
A preparation method for FRP muscle, with thermoplastic resin fibre 2 and inorganic reinforcing fiber 1 for raw material, comprises the following steps:
A, drying: thermoplastic resin fibre 2 is carried out drying process, its water content is reduced to below 40ppm, dry condition is preferably carry out drying process to thermoplastic resin fibre 2 under the vacuum condition of 115 ~ 160 DEG C in temperature, can avoid at high temperature like this, produce bubble during fibers melt, better ensure the properties of FRP muscle.
B, boundling: dried thermoplastic resin fibre 2 and inorganic reinforcing fiber 1 are carried out intersecting, the even boundling at interval, better make thermoplastic resin fibre 2 and inorganic reinforcing fiber 1 bind, to strengthen the performance such as durability and intensity of FRP muscle.
C, winding: be wound around through monfil by the fiber bundle after boundling, form helicitic texture, can ensure the shape of FRP muscle on the one hand, can strengthen the adhesion of FRP muscle and environment for use on the other hand.
D, drawing-off: FRP muscle bar obtained in step C is drawn in the preformed drying tunnel in step e through drafting machine.
E, preformed: preformed temperature is 160 ~ 285 DEG C, the preformed time with the fiber bundle of helicitic texture obtained by step C is 5 ~ 60s, the preformed time is selected according to FRP muscle different-diameter, makes the thermoplastic resin fibre 2 of FRP muscle inside fully, uniformly absorb heat.
F, shaping: shaping temperature is 180 ~ 320 DEG C, the molding time of the preformed FRP muscle obtained by step D is 10 ~ 100s, molding time can be selected according to FRP muscle different-diameter, makes the thermoplastic resin fibre 2 fully melting of FRP muscle inside, evenly diffusion coated inorganic fortifying fibre 1 around.
G, cooling curing: by FRP muscle at room temperature more than cooling curing 120s;
H, cut-out, make finished product, and thermoplastic FRP muscle obtained in step G is cut into any size to meet different engine requests.
Described thermoplastic resin fibre 2 is the fiber of polyester fiber, polypropylene fibre, Fypro, polyformaldehyde fibre, liquid crystal high polymers fiber or functional master batch modification; Described inorganic reinforcing fiber 1 is glass fiber, basalt fibre or carbon fiber, multiple choices can meet different engine requests, select different thermoplastic resin fibres, such as select different fibers according to the requirement of the performances such as fire resistance, corrosion resistance, antistatic behaviour, hydrophilicity or heat-resisting quantity modification, wherein the usage ratio of thermoplastic resin fibre 2 and inorganic reinforcing fiber 1 can require to allocate according to different engineering properties.
As the preferred technical solution of the present invention, between step F and G, also have step G1, step G1 is that geometry is shaping: FRP muscle after step F is shaping, before thermoplastic resin solidifies completely, FRP muscle is made required form, meets different engine requests.
In described step G1, FRP muscle, after high-temperature molding, in the 120s before thermoplastic resin fibre 2 is solidified completely, can ensure FRP muscle high-temperature molding, can ensure again before solidifying completely, FRP muscle to be made required shape, such as by FRP muscle triangularity, circle, W shape, M shape.
As shown in Figure 1, by the sectional view of FRP muscle provided by the invention, its thermoplastic resin fibre 2 and inorganic reinforcing fiber 1 carry out intersecting, the even arrangement at interval, the performance that compensate for conventional thermosetting FRP muscle and existing thermoplastic FRP muscle moulding process is not enough, improve self performance and the diversity of civil engineering FRP muscle, extend the scope of application, reduce cost of production, make the present invention adopt thermoplastic resin fibre 2 and inorganic reinforcing fiber 1 can produce the civil engineering thermoplastic resin FRP muscle of function admirable for raw material, production cost is low, efficiency is high.The thermoplastic FRP muscle diameter that the technology of the present invention is produced is at 5 ~ 50mm, cross section is typical circular, with the screw thread of certain depth, FRP muscle shape can make any different in nature shape of different engine request, and mechanical property, superior in durability, moulding process are simple, cost of production significantly reduces.
The preparation process of the thermoplastic resin FRP muscle provided in the present invention is described with embodiment below.
Embodiment 1:
Thermoplastic resin fibre 2 in the present embodiment adopts PP fiber, i.e. polypropylene fibre, and inorganic reinforcing fiber 1 is glass fiber.First by polypropylene fibre vacuum drying 12 hours under 115 DEG C of conditions, its water content is reduced to below 40ppm, and wherein the content of polypropylene fibre is 10% of raw material gross weight.
Dried polypropylene fibre and glass fiber are carried out intersect, the uniform boundling in interval, ensure that polypropylene fibre is evenly distributed in the FRP muscle body of rod, the diameter of preparation FRP muscle bar is 16mm; Again the high strength monfil of the fiber bundle after boundling is wound around, forms helicitic texture on FRP muscle bar surface; Draw in preformed drying tunnel by drafting machine by FRP muscle bar, FRP muscle bar is successively through preformed preheating zone, crush zone, pre-forming area, and the temperature in its each district is respectively 165 DEG C, 170 DEG C, 175 DEG C, and the time of FRP muscle in preformed flood road is 15s; After fiber enters shaping drying tunnel, successively through the preheating zone of overmolding drying tunnel, crush zone, melting zone, shaping area, heat preservation zone, the temperature in its each region is respectively 180 DEG C, 190 DEG C, 200 DEG C, 200 DEG C, 190 DEG C, and FRP muscle is 25s in the time of forming area, obtained FRP muscle; FRP muscle after direct cooling curing 120s, can cut into the FRP muscle of random length after drafting machine pull-out drying tunnel.The present embodiment does not carry out the shaping of special-shaped shape to FRP muscle.
The tensile strength > 650MPa of finally obtained FRP muscle finished product, shear strength > 125MPa, limiting strain > 7.5%, modulus > 40GPa, body of rod diameter 16.2mm.
Embodiment 2:
In the present embodiment, thermoplastic resin fibre 2 is polyester (terylene) fiber, and inorganic reinforcing fiber 1 is glass fiber.First, by polyester fiber vacuum drying 12 hours under the condition of 140 DEG C, make its water content be reduced to below 40ppm, wherein the content of polyester fiber is 15% of raw material gross weight.
Dried polyester fiber and glass fiber are carried out intersect, the uniform boundling in interval, ensure that polyester fiber is evenly distributed in the FRP muscle body of rod, the diameter of preparation FRP muscle is 20mm; Fiber bundle after boundling high strength monfil is wound around, forms helicitic texture on FRP muscle surface; Draw in preformed drying tunnel by drafting machine by FRP muscle bar, FRP muscle bar is successively through preformed preheating zone, crush zone, pre-forming area, and the temperature in its each district is respectively 240 DEG C, 250 DEG C, 260 DEG C, and the time of FRP muscle in preformed flood road is 20s; After fiber enters shaping drying tunnel, successively through the preheating zone of overmolding drying tunnel, crush zone, melting zone, shaping area, heat preservation zone, the temperature in its each region is respectively 270 DEG C, 280 DEG C, 290 DEG C, 290 DEG C, 280 DEG C, and FRP muscle is 35s in the time of forming area, obtained FRP muscle; FRP muscle after direct cooling curing 120s, can cut into the FRP muscle of random length after drafting machine pull-out drying tunnel.The present embodiment does not carry out the shaping of special-shaped shape to FRP muscle.
The tensile strength > 750MPa of the FRP muscle finished product finally made, shear strength > 150MPa, limiting strain > 7%, modulus > 50GPa, body of rod diameter 20.1mm.
Embodiment 3:
In the present embodiment, thermoplastic resin fibre 2 is polyamide (nylon) fiber, inorganic reinforcing fiber 1 for glass fiber be raw material.First, by Fypro vacuum drying 12 hours under the condition of 130 DEG C, make its water content be reduced to below 40ppm, wherein the content of Fypro is 20% of raw material gross weight.
Dried Fypro and glass fiber are carried out intersect, the uniform boundling in interval, ensure that Fypro is evenly distributed in the FRP muscle body of rod, the diameter of preparation FRP muscle is 25mm; Fiber bundle after boundling high strength monfil is wound around, forms helicitic texture on FRP muscle surface; Draw in preformed drying tunnel by drafting machine by FRP muscle bar, FRP muscle bar is successively through preformed preheating zone, crush zone, pre-forming area, and the temperature in its each district is respectively 185 DEG C, 195 DEG C, 205 DEG C, and the time of FRP muscle in preformed flood road is 25s; After fiber enters shaping drying tunnel, successively through the preheating zone of overmolding drying tunnel, crush zone, melting zone, shaping area, heat preservation zone, the temperature in its each region is respectively 215 DEG C, 220 DEG C, 230 DEG C, 230 DEG C, 220 DEG C, and FRP muscle is 40s in the time of forming area, obtained FRP muscle; Then by the step that geometry is shaping, obtained FRP muscle is prepared into circle, namely after FRP muscle high-temperature molding, before thermoplastic resin solidifies completely, by drafting machine by FRP muscle pull-out drying tunnel after through special-shaped shaping grinding apparatus, be prepared into the FRP muscle that diameter phi is the circle of 1000mm, with engineering demands.At room temperature cut off again after cooling.
The tensile strength > 700MPa of finally obtained FRP muscle finished product, shear strength > 130MPa, limiting strain > 7%, modulus > 45GPa, body of rod diameter 25.3mm.
Embodiment 4:
The present embodiment thermoplastic resin fibre 2 is liquid crystalline polyester fiber, and inorganic reinforcing fiber 1 is carbon fiber.First, by liquid crystalline polyester fiber vacuum drying 12 hours under the condition of 160 DEG C, make its water content be reduced to below 40ppm, wherein the content of liquid crystalline polyester fiber is 15% of raw material gross weight.And being evenly distributed in the FRP muscle body of rod, the diameter of preparation FRP muscle is 22mm.
Dried liquid crystalline polyester fiber and carbon fiber are carried out intersect, the uniform boundling in interval, ensure that liquid crystalline polyester fiber is evenly distributed in the FRP muscle body of rod, the diameter of preparation FRP muscle is 22mm; Fiber bundle after boundling high strength monfil is wound around, forms helicitic texture on FRP muscle surface; Draw in preformed drying tunnel by drafting machine by FRP muscle bar, FRP muscle bar is successively through preformed preheating zone, crush zone, pre-forming area, and the temperature in its each district is respectively 265 DEG C, 275 DEG C, 285 DEG C, and the time of FRP muscle in preformed flood road is 20s; After fiber enters shaping drying tunnel, successively through the preheating zone of overmolding drying tunnel, crush zone, melting zone, shaping area, heat preservation zone, the temperature in its each region is respectively 295 DEG C, 310 DEG C, 320 DEG C, 320 DEG C, 310 DEG C, and FRP muscle is 35s in the time of forming area, obtained FRP muscle; FRP muscle after direct cooling curing 120s, can cut into the FRP muscle of random length after drafting machine pull-out drying tunnel.The present embodiment does not carry out the shaping of special-shaped shape to FRP muscle.
The tensile strength > 1200MPa of finally obtained FRP muscle finished product, shear strength > 200MPa, limiting strain > 2%, modulus > 110GPa, body of rod diameter 22.3mm.
Claims (4)
1. a FRP muscle, is characterized in that, is undertaken intersecting, the even arrangement at interval makes by thermoplastic resin fibre and inorganic reinforcing fiber; Described FRP muscle surface has the helicitic texture be entwined by monfil; Wherein, described FRP muscle can be prepared by the step of following order and obtain:
A, drying: be, under the vacuum condition of 115 ~ 160 DEG C, drying process is carried out to described thermoplastic resin fibre in temperature;
B, boundling: dried described thermoplastic resin fibre and described inorganic reinforcing fiber are carried out intersect, the even boundling at interval;
C, winding: be wound around through described monfil by the fiber bundle after boundling, form helicitic texture;
D, drawing-off preformed: the FRP muscle bar that step C is obtained draws in preformed drying tunnel through drafting machine; Wherein, preformed temperature is 160 ~ 285 DEG C, and the preformed time is 5 ~ 60s;
E, shaping: the FRP muscle bar obtained through step D enters shaping drying tunnel; Wherein, shaping temperature is 180 ~ 320 DEG C, and molding time is 10 ~ 100s;
F, cooling curing: FRP muscle to be pulled out after shaping drying tunnel at room temperature more than cooling curing 120s through drafting machine;
G, cut-out: the thermoplastic FRP muscle obtained in step F is cut into any size and make finished product to meet different engine requests.
2. FRP muscle according to claim 1, is characterized in that, described monfil is the fiber of polyester fiber, polypropylene fibre, Fypro, polyformaldehyde fibre, liquid crystal high polymers fiber or functional master batch modification.
3. FRP muscle according to claim 1, is characterized in that, described thermoplastic resin fibre is the fiber of polyester fiber, polypropylene fibre, Fypro, polyformaldehyde fibre, liquid crystal high polymers fiber or functional master batch modification; Described inorganic reinforcing fiber is glass fiber, basalt fibre or carbon fiber.
4. FRP muscle according to claim 1, is characterized in that, FRP muscle is triangle, circle, W shape or M shape.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
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| CN201010169644.5A CN102235057B (en) | 2010-05-07 | 2010-05-07 | A kind of FRP muscle |
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| Application Number | Priority Date | Filing Date | Title |
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| CN201010169644.5A CN102235057B (en) | 2010-05-07 | 2010-05-07 | A kind of FRP muscle |
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| CN102235057A CN102235057A (en) | 2011-11-09 |
| CN102235057B true CN102235057B (en) | 2015-08-19 |
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| CN201010169644.5A Expired - Fee Related CN102235057B (en) | 2010-05-07 | 2010-05-07 | A kind of FRP muscle |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN102745944A (en) * | 2012-06-05 | 2012-10-24 | 河海大学 | Steel fiber reinforced glass fiber resin composite bar material and preparation method |
| CN107056247A (en) * | 2016-12-21 | 2017-08-18 | 周易 | A kind of high tenacity ceramic material and preparation method thereof |
| CN106868676B (en) * | 2017-03-01 | 2019-08-27 | 唐山开滦化工科技有限公司 | A kind of three-dimensional shuffling polyimide fiber enhancing polyformaldehyde composite material and preparation method thereof |
| CN107009647A (en) * | 2017-03-14 | 2017-08-04 | 海宁安捷复合材料有限责任公司 | A kind of basalt composite reinforcing and its preparation technology |
| CN108529961A (en) * | 2018-03-30 | 2018-09-14 | 广西交通规划勘察设计研究院有限公司 | A kind of green high performance concrete material and preparation method thereof |
Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS5893007A (en) * | 1981-11-30 | 1983-06-02 | Furukawa Electric Co Ltd:The | Overhead wire |
| US4876143A (en) * | 1985-07-05 | 1989-10-24 | Shimizu Construction Co., Ltd. | Rod material |
| CN1916327A (en) * | 2006-08-11 | 2007-02-21 | 中材科技股份有限公司 | Fiber wall with strong rib material of plastic |
| CN101560816A (en) * | 2009-05-15 | 2009-10-21 | 同济大学 | FRP rib fibre cloth winding coaxial connection method |
Family Cites Families (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2003055850A (en) * | 2001-08-10 | 2003-02-26 | Fukushima Prefecture | Composite yarn and fiber-reinforced plastic |
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2010
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Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS5893007A (en) * | 1981-11-30 | 1983-06-02 | Furukawa Electric Co Ltd:The | Overhead wire |
| US4876143A (en) * | 1985-07-05 | 1989-10-24 | Shimizu Construction Co., Ltd. | Rod material |
| CN1916327A (en) * | 2006-08-11 | 2007-02-21 | 中材科技股份有限公司 | Fiber wall with strong rib material of plastic |
| CN101560816A (en) * | 2009-05-15 | 2009-10-21 | 同济大学 | FRP rib fibre cloth winding coaxial connection method |
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