CN102634178A - Method for manufacturing U-shaped tray for glass fiber reinforced cable bridges - Google Patents

Method for manufacturing U-shaped tray for glass fiber reinforced cable bridges Download PDF

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Publication number
CN102634178A
CN102634178A CN201210151743XA CN201210151743A CN102634178A CN 102634178 A CN102634178 A CN 102634178A CN 201210151743X A CN201210151743X A CN 201210151743XA CN 201210151743 A CN201210151743 A CN 201210151743A CN 102634178 A CN102634178 A CN 102634178A
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district
glass
weight
preparation
master batch
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CN102634178B (en
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张华集
肖荔人
张雯
陈晓
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Fujian Normal University
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Fujian Normal University
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    • 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
    • B29B7/00—Mixing; Kneading
    • B29B7/30—Mixing; Kneading continuous, with mechanical mixing or kneading devices
    • B29B7/58—Component parts, details or accessories; Auxiliary operations
    • B29B7/72—Measuring, controlling or regulating
    • 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
    • B29B7/00—Mixing; Kneading
    • B29B7/80—Component parts, details or accessories; Auxiliary operations
    • B29B7/88—Adding charges, i.e. additives
    • B29B7/90—Fillers or reinforcements, e.g. fibres
    • 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
    • B29C48/04—Particle-shaped
    • 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
    • B29C48/36—Means for plasticising or homogenising the moulding material or forcing it through the nozzle or die
    • B29C48/395—Means for plasticising or homogenising the moulding material or forcing it through the nozzle or die using screws surrounded by a cooperating barrel, e.g. single screw extruders
    • B29C48/397—Means for plasticising or homogenising the moulding material or forcing it through the nozzle or die using screws surrounded by a cooperating barrel, e.g. single screw extruders using a single screw
    • 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
    • B29C48/78—Thermal treatment of the extrusion moulding material or of preformed parts or layers, e.g. by heating or cooling
    • B29C48/875—Thermal treatment of the extrusion moulding material or of preformed parts or layers, e.g. by heating or cooling for achieving a non-uniform temperature distribution, e.g. using barrels having both cooling and heating zones
    • 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
    • B29C48/92—Measuring, controlling or regulating
    • C—CHEMISTRY; METALLURGY
    • C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
    • C08K—Use of inorganic or non-macromolecular organic substances as compounding ingredients
    • C08K5/00—Use of organic ingredients
    • C08K5/0008—Organic ingredients according to more than one of the "one dot" groups of C08K5/01 - C08K5/59
    • C08K5/0066—Flame-proofing or flame-retarding additives
    • C—CHEMISTRY; METALLURGY
    • C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
    • C08K—Use of inorganic or non-macromolecular organic substances as compounding ingredients
    • C08K5/00—Use of organic ingredients
    • C08K5/16—Nitrogen-containing compounds
    • C08K5/20—Carboxylic acid amides
    • C—CHEMISTRY; METALLURGY
    • C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
    • C08L—COMPOSITIONS OF MACROMOLECULAR COMPOUNDS
    • C08L67/00—Compositions of polyesters obtained by reactions forming a carboxylic ester link in the main chain; Compositions of derivatives of such polymers
    • C08L67/02—Polyesters derived from dicarboxylic acids and dihydroxy compounds
    • 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
    • B29B7/00—Mixing; Kneading
    • B29B7/30—Mixing; Kneading continuous, with mechanical mixing or kneading devices
    • B29B7/34—Mixing; Kneading continuous, with mechanical mixing or kneading devices with movable mixing or kneading devices
    • B29B7/38—Mixing; Kneading continuous, with mechanical mixing or kneading devices with movable mixing or kneading devices rotary
    • B29B7/40—Mixing; Kneading continuous, with mechanical mixing or kneading devices with movable mixing or kneading devices rotary with single shaft
    • 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
    • B29C2948/00—Indexing scheme relating to extrusion moulding
    • B29C2948/92—Measuring, controlling or regulating
    • B29C2948/92504—Controlled parameter
    • B29C2948/92704—Temperature
    • 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
    • B29C2948/00—Indexing scheme relating to extrusion moulding
    • B29C2948/92—Measuring, controlling or regulating
    • B29C2948/92819—Location or phase of control
    • B29C2948/92857—Extrusion unit
    • B29C2948/92876—Feeding, melting, plasticising or pumping zones, e.g. the melt itself
    • B29C2948/92895—Barrel or housing
    • C—CHEMISTRY; METALLURGY
    • C09—DYES; PAINTS; POLISHES; NATURAL RESINS; ADHESIVES; COMPOSITIONS NOT OTHERWISE PROVIDED FOR; APPLICATIONS OF MATERIALS NOT OTHERWISE PROVIDED FOR
    • C09K—MATERIALS FOR MISCELLANEOUS APPLICATIONS, NOT PROVIDED FOR ELSEWHERE
    • C09K21/00—Fireproofing materials

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  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Chemical & Material Sciences (AREA)
  • Health & Medical Sciences (AREA)
  • Chemical Kinetics & Catalysis (AREA)
  • Medicinal Chemistry (AREA)
  • Polymers & Plastics (AREA)
  • Organic Chemistry (AREA)
  • Physics & Mathematics (AREA)
  • Thermal Sciences (AREA)
  • Compositions Of Macromolecular Compounds (AREA)
  • Organic Insulating Materials (AREA)

Abstract

The invention discloses a method for manufacturing U-shaped trays for glass fiber reinforced cable bridges. The method comprises machining processes of as 65-73 parts by weight of glass fiber reinforced polyethylene glycol terephthalate is taken as a raw material, adding 15-20 parts by weight of polyethylene glycol terephthalate, 11-14 parts by weight of fire retardant master batch, 0.7-1.2 parts by weight of bis(2,2,6,6-tetramethyl-4-piperidyl)sebate, drying, dehumidifying, mixing, extruding, molding, cooling and shaping so as to obtain the U-shaped tray for the tray-type cable bridges. The U-shaped tray manufactured by using the method is strong in erosion resistance, low in heat conductivity coefficient, high in bending resistant strength, long in service life and low in cost and is applicable for the cable bridges in fields such as petroleum, chemical industry, light industry, television, and telecommunication.

Description

A kind of glass enhancement type cable crane span structure is with the preparation method of U type pallet
Technical field
The present invention relates to the preparation method of cable testing bridge, a kind of specifically glass enhancement type bracket tray formula cable testing bridge is with the preparation method of U type pallet.
Background technology
Current society, the development of world economy presents the multifarious trend of high speed, and the quick interchange of information makes the contact of each countries and regions close day by day, and cable transmits important link as information and is bringing into play irreplaceable effect.It is crucial that cable testing bridge installation and crane span structure inner cable lay for whole cable construction process, selects suitable cable bridge formation and cable running mode and cable transmission engineering and work-ing life closely bound up.Cable testing bridge is made up of the rigid structure system that pallet, curved logical, assembly, suspension bracket etc. constitute carrying cable usually, is the installation channel that is applied in horizontal wiring and vertical wiring.Cable testing bridge mainly is divided into structure formations such as slot type, pellet type, built-up type.
That the pellet type cable testing bridge has is in light weight, load is big, advantage such as handsome in appearance, simple in structure, easy for installation, is widely used in fields such as chemical industry, light industry, oil, telecommunication, TV.At present, the U type pallet of pellet type cable testing bridge use has following several kinds: common A3 zinc-plated (plastic-blasting) steel tray, stainless steel pallet, duraluminum pallet, glass reinforced plastic pallet etc.Common A3 zinc-plated (plastic-blasting) pallet cost is low, and production technique is simple, but its preservative property are poor, be prone to oxidation and rusting, work-ing life is shorter, in case the presence of fire of cable surrounding environment, the temperature of pallet passes to cable very soon, can cause cable fault.Stainless steel pallet good looking appearance, long service life, antiseptic property are good, but its cost is high, thermal conductivity is high, can cause cable fault during fire.Duraluminum pallet good looking appearance, in light weight but have that intensity is low, bearing capacity is little, cost is high, the surface is prone to shortcomings such as oxidation, thermal conductivity height.The glass reinforced plastic pallet is in light weight, corrosion-resistant, long service life, can produce a large amount of dense smokes and influence personal life security but its cost is high, the feature of environmental protection is poor, meet with naked light.Thereby the research and development antiseptic property is good, intensity is high, thermal conductivity is low, long service life, U type pallet that cost is low have caused material engineering those skilled in the art's concern.Retrieval number of patents document and the RP of publishing; It is raw material that Shang Weijian adopts glass to strengthen polyethylene terephthalate (glass REINFORCED PET); Add polybutylene terephthalate (PBT), fire retardant master batch, two (2,2,6; 6-tetramethyl--4-piperidyl) sebate, preparation pellet type cable testing bridge is with the report of U type pallet.
Summary of the invention
Have in order to overcome U type pallet that existing pellet type cable testing bridge uses that antiseptic property is poor, thermal conductivity high, work-ing life defective such as weak point, cost height, the invention provides the preparation method of a kind of glass enhancement type bracket tray formula cable testing bridge with U type pallet.It is raw material that present method strengthens polyethylene terephthalate (glass REINFORCED PET) with glass; Add polybutylene terephthalate (PBT), fire retardant master batch, two (2; 2; 6,6-tetramethyl--4-piperidyl) sebate, form the pellet type cable testing bridge with U type pallet through desiccant dehumidification, mixing of materials, extrusion moulding, cooling and shaping processes.Adopt the U type pallet of present method preparation, erosion resistance is strong, thermal conductivity is low, flexural strength is high, bearing capacity is big, long service life, cost are low, is applicable to the cable testing bridge in fields such as oil, chemical industry, light industry, TV, telecommunication.
For the following technical scheme that realizes that the object of the invention adopts:
Prescription
Glass strengthens polyethylene terephthalate (glass REINFORCED PET) 65～73 weight parts, polybutylene terephthalate (PBT) 15～20 weight parts, fire retardant master batch 11～14 weight parts; Two (2; 2,6,6-tetramethyl--4-piperidyl) sebate 0.7～1.2 weight part.
The preparation method
Glass REINFORCED PET and PBT are placed the electric heating constant temperature blast drier respectively, and 120 ± 1 ℃ of control electric heating constant temperature blast drier temperature are behind the dry 4h; Place impeller by the formula rate weighing, add the fire retardant master batch, two (2,2 after measuring successively; 6; 6-tetramethyl--4-piperidyl) sebate, 100 ± 1 ℃ of control impeller rotating speed 250r/min, temperature mix 8 min and become compound; Compound is placed single screw extrusion molding machine hopper, control single screw extrusion molding machine barrel temperature: 258～263 ℃ in I district, 265～268 ℃ in II district; 260～265 ℃ in III district, 255～260 ℃ in IV district, 248～253 ℃ in V district; 240～245 ℃ in VI district, 238～242 ℃ in VII district controls single screw extrusion molding machine die head temperature: 235～238 ℃; Carry out extrusion moulding, behind cooling and shaping, cut into U type pallet again.
Glass of the present invention strengthens polyethylene terephthalate (glass REINFORCED PET), and its spun glass massfraction is 30%.
Polybutylene terephthalate of the present invention (PBT), its limiting viscosity are 0.9dL/g, and density is 1.3g/cm 3
Fire retardant master batch of the present invention is made up of micro encapsulation red phosphorus, ethylene-acrylic acid copolymer and three kinds of components of amine hydroxybenzene, and wherein the weight percent of each component is: micro encapsulation red phosphorus accounts for 82%, ethylene-acrylic acid copolymer accounts for 12%, amine hydroxybenzene accounts for 6%.
The invention has the beneficial effects as follows: 1. adopting polybutylene terephthalate (PBT) is toughening material; The glass REINFORCED PET is carried out toughening modifying; Increase substantially the notched Izod impact strength of glass REINFORCED PET, improve the crystallization velocity of intermingling material, shorten the shaping cycle of U type pallet; 2. add fire retardant master batch and two (2,2,6,6-tetramethyl--4-piperidyl) sebates, increase substantially the flame retardant properties and the weather resistance of U type pallet; 3. the U type pallet of present method preparation, erosion resistance is strong, thermal conductivity is low, flexural strength is high, bearing capacity is big, long service life, cost are low, is applicable to the cable testing bridge in fields such as oil, chemical industry, light industry, TV, telecommunication.
Embodiment
Embodiment 1:
With the spun glass massfraction is that 30% glass REINFORCED PET and limiting viscosity are that 0.9dL/g, density are 1.3g/cm 3PBT place the electric heating constant temperature blast drier respectively, 120 ℃ of control electric heating constant temperature blast drier temperature are behind the dry 4h; Take by weighing dried glass REINFORCED PET 65 Kg and PBT15 Kg; Place impeller, add fire retardant master batch 11 Kg and two (2,2 that contain 82% micro encapsulation red phosphorus, 12% ethylene-acrylic acid copolymer, 6% amine hydroxybenzene successively; 6; 6-tetramethyl--4-piperidyl) sebate 0.7 Kg, 100 ℃ of control impeller rotating speed 250r/min, temperature mix 8 min and become compound; Compound is placed single screw extrusion molding machine hopper, control single screw extrusion molding machine barrel temperature: 258 ℃ in I district, 268 ℃ in II district; 265 ℃ in III district, 260 ℃ in IV district, 253 ℃ in V district; 245 ℃ in VI district, 242 ℃ in VII district controls single screw extrusion molding machine die head temperature: 238 ℃; Carry out extrusion moulding, behind cooling and shaping, cut into U type pallet again.
Embodiment 2:
With the spun glass massfraction is that 30% glass REINFORCED PET and limiting viscosity are that 0.9dL/g, density are 1.3g/cm 3PBT place the electric heating constant temperature blast drier respectively, 119 ℃ of control electric heating constant temperature blast drier temperature are behind the dry 4h; Take by weighing dried glass REINFORCED PET 73 Kg and PBT20 Kg; Place impeller, add fire retardant master batch 14 Kg and two (2,2 that contain 82% micro encapsulation red phosphorus, 12% ethylene-acrylic acid copolymer, 6% amine hydroxybenzene successively; 6; 6-tetramethyl--4-piperidyl) sebate 1.2 Kg, 101 ℃ of control impeller rotating speed 250r/min, temperature mix 8 min and become compound; Compound is placed single screw extrusion molding machine hopper, control single screw extrusion molding machine barrel temperature: 263 ℃ in I district, 265 ℃ in II district; 260 ℃ in III district, 255 ℃ in IV district, 248 ℃ in V district; 240 ℃ in VI district, 238 ℃ in VII district controls single screw extrusion molding machine die head temperature: 235 ℃; Carry out extrusion moulding, behind cooling and shaping, cut into U type pallet again.
Embodiment 3:
With the spun glass massfraction is that 30% glass REINFORCED PET and limiting viscosity are that 0.9dL/g, density are 1.3g/cm 3PBT place the electric heating constant temperature blast drier respectively, 121 ℃ of control electric heating constant temperature blast drier temperature are behind the dry 4h; Take by weighing dried glass REINFORCED PET 70 Kg and PBT18 Kg; Place impeller, add fire retardant master batch 13 Kg and two (2,2 that contain 82% micro encapsulation red phosphorus, 12% ethylene-acrylic acid copolymer, 6% amine hydroxybenzene successively; 6; 6-tetramethyl--4-piperidyl) sebate 0.9 Kg, 99 ℃ of control impeller rotating speed 250r/min, temperature mix 8 min and become compound; Compound is placed single screw extrusion molding machine hopper, control single screw extrusion molding machine barrel temperature: 260 ℃ in I district, 267 ℃ in II district; 263 ℃ in III district, 258 ℃ in IV district, 250 ℃ in V district; 243 ℃ in VI district, 240 ℃ in VII district controls single screw extrusion molding machine die head temperature: 237 ℃; Carry out extrusion moulding, behind cooling and shaping, cut into U type pallet again.

Claims (4)

1. a glass enhancement type cable crane span structure is characterized in that with the preparation method of U type pallet:
Prescription
Glass strengthens polyethylene terephthalate 65～73 weight parts, polybutylene terephthalate 15～20 weight parts, fire retardant master batch 11～14 weight parts, two (2,2,6,6-tetramethyl--4-piperidyl) sebate 0.7～1.2 weight part;
The preparation method
Glass is strengthened polyethylene terephthalate and polybutylene terephthalate places the electric heating constant temperature blast drier respectively, and 120 ± 1 ℃ of control electric heating constant temperature blast drier temperature are behind the dry 4h; Place impeller by the formula rate weighing, add the fire retardant master batch, two (2,2 after measuring successively; 6; 6-tetramethyl--4-piperidyl) sebate, 100 ± 1 ℃ of control impeller rotating speed 250r/min, temperature mix 8 min and become compound; Compound is placed single screw extrusion molding machine hopper, control single screw extrusion molding machine barrel temperature: 258～263 ℃ in I district, 265～268 ℃ in II district; 260～265 ℃ in III district, 255～260 ℃ in IV district, 248～253 ℃ in V district; 240～245 ℃ in VI district, 238～242 ℃ in VII district controls single screw extrusion molding machine die head temperature: 235～238 ℃; Carry out extrusion moulding, behind cooling and shaping, cut into U type pallet again.
2. glass enhancement type cable crane span structure according to claim 1 is characterized in that with the preparation method of U type pallet the spun glass massfraction is 30% in the described glass enhancing polyethylene terephthalate.
3. glass enhancement type cable crane span structure according to claim 1 is characterized in that with the preparation method of U type pallet described polybutylene terephthalate limiting viscosity is 0.9dL/g, and density is 1.3g/cm 3
4. glass enhancement type cable crane span structure according to claim 1 is with the preparation method of U type pallet; It is characterized in that described fire retardant master batch is made up of micro encapsulation red phosphorus, ethylene-acrylic acid copolymer and three kinds of components of amine hydroxybenzene, wherein the weight percent of each component is: micro encapsulation red phosphorus accounts for 82%, ethylene-acrylic acid copolymer accounts for 12%, amine hydroxybenzene accounts for 6%.
CN201210151743XA 2012-05-17 2012-05-17 Method for manufacturing U-shaped tray for glass fiber reinforced cable bridges Expired - Fee Related CN102634178B (en)

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CN102634178B CN102634178B (en) 2013-07-03

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Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN108879508A (en) * 2018-06-08 2018-11-23 江苏中讯电力科技有限公司 A kind of high-performance large span cable bridge rack

Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2000198912A (en) * 1998-10-29 2000-07-18 Toray Ind Inc Flame retardant resin composition and molded article
JP2001226570A (en) * 2000-02-18 2001-08-21 Toray Ind Inc Flame-retardant polyester resin composition
CN102108189A (en) * 2009-12-28 2011-06-29 上海日之升新技术发展有限公司 Polybutylece terephthalate (PBT)/poly(ethylene terephthalate) (PET) alloy material and preparation method thereof

Patent Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2000198912A (en) * 1998-10-29 2000-07-18 Toray Ind Inc Flame retardant resin composition and molded article
JP2001226570A (en) * 2000-02-18 2001-08-21 Toray Ind Inc Flame-retardant polyester resin composition
CN102108189A (en) * 2009-12-28 2011-06-29 上海日之升新技术发展有限公司 Polybutylece terephthalate (PBT)/poly(ethylene terephthalate) (PET) alloy material and preparation method thereof

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN108879508A (en) * 2018-06-08 2018-11-23 江苏中讯电力科技有限公司 A kind of high-performance large span cable bridge rack

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