CN104693787A - High-toughness wear-resistant glass fiber/nylon 6 composite for rail transit fasteners - Google Patents

High-toughness wear-resistant glass fiber/nylon 6 composite for rail transit fasteners Download PDF

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Publication number
CN104693787A
CN104693787A CN201310646768.1A CN201310646768A CN104693787A CN 104693787 A CN104693787 A CN 104693787A CN 201310646768 A CN201310646768 A CN 201310646768A CN 104693787 A CN104693787 A CN 104693787A
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China
Prior art keywords
nylon
composite
glass
glass fiber
toughness wear
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Pending
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CN201310646768.1A
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Chinese (zh)
Inventor
王宏超
王兴年
杨鑫
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Heilongjiang Xinda Enterprise Group Co Ltd
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Heilongjiang Xinda Enterprise Group Co Ltd
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Priority to CN201310646768.1A priority Critical patent/CN104693787A/en
Publication of CN104693787A publication Critical patent/CN104693787A/en
Pending legal-status Critical Current

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    • C—CHEMISTRY; METALLURGY
    • C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
    • C08L—COMPOSITIONS OF MACROMOLECULAR COMPOUNDS
    • C08L77/00—Compositions of polyamides obtained by reactions forming a carboxylic amide link in the main chain; Compositions of derivatives of such polymers
    • C08L77/02—Polyamides derived from omega-amino carboxylic acids or from lactams thereof
    • C—CHEMISTRY; METALLURGY
    • C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
    • C08L—COMPOSITIONS OF MACROMOLECULAR COMPOUNDS
    • C08L2201/00—Properties
    • C08L2201/08—Stabilised against heat, light or radiation or oxydation
    • C—CHEMISTRY; METALLURGY
    • C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
    • C08L—COMPOSITIONS OF MACROMOLECULAR COMPOUNDS
    • C08L2205/00—Polymer mixtures characterised by other features
    • C08L2205/03—Polymer mixtures characterised by other features containing three or more polymers in a blend

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  • Chemical & Material Sciences (AREA)
  • Health & Medical Sciences (AREA)
  • Chemical Kinetics & Catalysis (AREA)
  • Medicinal Chemistry (AREA)
  • Polymers & Plastics (AREA)
  • Organic Chemistry (AREA)
  • Compositions Of Macromolecular Compounds (AREA)

Abstract

The invention relates a high-toughness wear-resistant glass fiber/nylon 6 composite for rail transit fasteners. The innovation of the technical process for preparation of the high-toughness wear-resistant glass fiber/nylon 6 composite is as follows: the glass fiber/nylon 6 composite is toughened by compounding maleic anhydride grafted polyolefin elastomer and ethylene-propylene-diene monomer, and the modified high-toughness wear-resistant glass fiber/nylon 6 composite for the rail transit fasteners can be obtained by blending extrusion of the toughened glass fiber/nylon 6 composite, traction, cooling and grain-sized dicing. In the field of railway traffic product accessories, compared with traditional nylon 6 products, the high-toughness wear-resistant glass fiber/nylon 6 composite for the rail transit fasteners has both high rigidity and good fatigue resistance, and high normal-temperature and low-temperature toughness and wear resistance can be improved, and adaptability in cold areas can be improved; and by addition of glass fibers and the hollow glass beads, the production cost and energy consumption can be reduced, and certain rigidity, wear resistance and antistatic properties can be ensured.

Description

A kind of high-toughness wear-resistant track traffic fastening piece glass/nylon 6 composite material
Technical field
The present invention relates to polymeric material field, be specifically related to a kind of high-toughness wear-resistant track traffic fastening piece glass/nylon 6 composite material and preparation method thereof, be mainly used in the track traffic fastening piece in Iron-surfur clusters field.
Background technology
Nylon, for railway, effectively can solve the problem that motor vehicle is shaken, noise is large, and can guarantee that wheelbase is stablized, and reduce frequency of maintenance, particularly it has excellent vibration resistance, to ensureing that the smooth running of railway locomotive is most important.Along with railway locomotive travels speed goes soon, also more and more higher to the performance requriements of Iron-surfur clusters accordingly, the Han Dong district of low temperature is extremely strict to the requirement of product performance especially throughout the year.Fastening piece (comprising nylon sleeve, anti-distance block, apron block) on domestic and international common railway, high ferro, subway all uses nylon as raw material, but its low-temperature flexibility is poor, wear resistance is low and production cost is high, let nature take its course so improve nylon 6 performance by glass.
Summary of the invention
The present invention has prepared a kind of high-toughness wear-resistant track traffic fastening piece glass/nylon 6 composite material, the shaped piece prepared of this material is for the fastening piece of railway systems, composite toughing agent is utilized to improve the toughness of glass/nylon 6 composite material, utilize the oilness of hollow glass micropearl to improve the anisotropy of glass, improve its wear resistance, oxidation-resistance, high temperature resistant.
technical scheme:
The preparation method of above-mentioned high-toughness wear-resistant track traffic fastening piece glass/nylon 6 composite material comprises:
Step one, to carry out at 110 ~ 120 DEG C nylon 6 drying for 4 ~ 5 hours;
Step 2, undertaken blended by toughening agent maleic anhydride grafting polyolefin elastomer and terpolymer EP rubber, the blended time is 5 ~ 8min;
High-speed mixer put into by step 3, the dry nylon 6 handled well by silane coupling agent, composite toughing agent, hollow glass micropearl, oxidation inhibitor, static inhibitor, stirs 5 ~ 10 minutes at normal temperatures;
Step 4, mixed for step 3 material is joined in the hopper of twin screw extruder, the glass fiber opening of glass fibre from twin screw stage casing is added, extrudes through melt blending, the cooling of water-cooled, air knife, granulation, homogenizing, packaging;
Wherein, the temperature of twin screw extruder is set to: back segment temperature is 235 ~ 245 DEG C, and stage casing temperature and front-end temperature are 245 ~ 255 DEG C, and screw speed is 220 ~ 280r/min.
The invention solves the tough sex chromosome mosaicism of traditional glass/nylon 6 composite material, composite toughner effectively can reduce production cost simultaneously, simultaneously can to improve product apparent for hollow glass micropearl, improve wear resistance, high thermal resistance, static inhibitor can improve small product size resistivity, and make material have mechanical property well, be satisfied with the application of railway territory.
specific examples:
For ease of further illustrating the present invention, below in conjunction with specific embodiment, the present invention will be described:
Main raw material Nylon 6, limiting viscosity 2.48dL/g; Toughner uses maleic anhydride stem grafting polyolefin elastomerics and terpolymer EP rubber; Filler is the hollow glass micropearl of buying; Fiberfill fibers uses the high-temperature fibre of buying; Oxidation inhibitor comprises 168; Anti-glass emergence on the surface agent 1010; Static inhibitor ATMER-129.Twin-screw extruder barrel temperature one district temperature: 220 ~ 240 DEG C, two district's temperature: 230 ~ 250 DEG C, three district's temperature: 230 ~ 250 DEG C, four district's temperature: 230 ~ 250 DEG C, five district's temperature: 220 ~ 240 DEG C, six district's temperature: 230 ~ 250 DEG C, pressure is 10 ~ 16MPa, screw slenderness ratio 35 ~ 40, engine speed 200 ~ 250r/min.Each component is mixed by proportioning and is placed in twin screw extruder, through melting mixing extruding pelletization.
In various embodiments of the present invention, the modification glass/nylon 6 composite material of gained, stays into test bars by following lodging condition.Injecting condition: injection temperature 230 ~ 240 DEG C, injection pressure 40 ~ 50MPa, injection speed 30 ~ 40mm/s.
The concrete examination criteria of each embodiment is as follows:
Notched Izod impact strength ISO179
Low temperature notched shock strength ISO179（-50℃，5H）
Tensile strength ISO527（5mm/min）
Flexural strength ISO178（3mm/min）
Modulus in flexure ISO178（3mm/min）
Frictional coefficient GB/T3960
Volume specific resistance GB/T1410-2006
Each amounts of components of embodiment 1 ~ 5 correspondence and properties of sample (see table 1 and table 2) corresponding to each Example formulations
The formula table of table 1 embodiment 1 ~ 4
The physicals that table 2 each embodiment sample is corresponding
Test item Embodiment 1 Embodiment 2 Embodiment 3 Embodiment 4 Embodiment 5
Notched Izod impact strength KJ/m 2 23 29.8 32 27.9 18.6
Tensile strength MPa 91.7 104.2 100.7 98.2 73.6
Flexural strength MPa 126.2 180.3 170.4 156.4 139.7
Modulus in flexure MPa 2963 5619 5382 4093 3953
Low temperature notched shock strength (-50 DEG C, 5H) 15.5 18.1 21.1 17.5 12.5
Frictional coefficient 0.29 0.31 0.29 0.30 0.29
Volume specific resistance 107 107 107 107 107
Table 3 does not add the physicals of toughner glass/nylon 6 composite material
Test item Nylon 6
Shock strength KJ/m 2 19
Tensile strength MPa 73.6
Flexural strength MPa 98.6
Modulus in flexure MPa 957
Low temperature notched shock strength (-50 DEG C, 5H) 9.5
Frictional coefficient 0.36
Volume specific resistance 95
Known by the material property comparative analysis of table 2 embodiment 1 ~ 5, the present invention adopts the maleic anhydride stem grafting polyolefin elastomerics of several different ratios, terpolymer EP rubber, prepare the glass fiber reinforced nylon 6 matrix material material of different over-all properties, from table 2, table 3 is known, the normal temperature notched Izod impact strength of modification glass/nylon 6 composite material significantly improves compared with unmodified nylon 6 material with low temperature notched shock strength, the frictional coefficient of material obviously reduces simultaneously, wear resistance strengthens, prove that its this kind of material is adapted at cold particular surroundings of freezing region and uses, and meet national track traffic fastening piece standard TB/T1495.5, so the raw material that the high-toughness wear-resistant glass/nylon 6 composite material of preparation is suitable as the track traffic fastening piece of railway territory uses.

Claims (5)

1. the formula of this high-toughness wear-resistant track traffic fastening piece glass/nylon 6 composite material composed as follows shown in:
Nylon 6 50 ~ 55%
Glass fibre 28 ~ 32%
Toughner 19 ~ 20%
Filler 4 ~ 6%
Anti-glass emergence on the surface agent 1%
Static inhibitor 0.5
Auxiliary agent 0.1 ~ 1%.
2. high-toughness wear-resistant track traffic fastening piece glass/nylon 6 composite material according to claim 1, is characterized in that: described toughner is the combination of the 1:1 of maleic anhydride stem grafting polyolefin elastomerics and terpolymer EP rubber.
3. high-toughness wear-resistant track traffic fastening piece glass/nylon 6 composite material according to claim 1, is characterized in that:
Described filler is hollow glass micropearl, diameter: 35um, wall thickness 1 ~ 5um.
4. high-toughness wear-resistant track traffic fastening piece glass/nylon 6 composite material according to claim 1, is characterized in that:
Described glass fibre is the continuous roving glass fiber of E type alkali-free, diameter 8 ~ um.
5. high-toughness wear-resistant track traffic fastening piece glass/nylon 6 composite material according to claim 1, is characterized in that:
Step one, nylon 6 to be dried 4 ~ 5 hours at 110 ~ 120 DEG C;
Step 2, undertaken blended by toughening agent maleic anhydride grafting polyolefin elastomer and terpolymer EP rubber, the blended time is 5 ~ 8min;
Step 3, the nylon 6 of drying, composite toughing agent, hollow glass micropearl, oxidation inhibitor, static inhibitor are put into high-speed mixer, stir 5 ~ 10 minutes at normal temperatures;
Glass otch adds, extrude through melt blending, the cooling of water-cooled, air knife, granulation, homogenizing, packaging; Wherein, the temperature of twin screw extruder is set to: back segment temperature is 235 ~ 245 DEG C, and stage casing and front-end temperature are 245 ~ 255 DEG C, and screw speed is 220 ~ 280r/min.
CN201310646768.1A 2013-12-06 2013-12-06 High-toughness wear-resistant glass fiber/nylon 6 composite for rail transit fasteners Pending CN104693787A (en)

Priority Applications (1)

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Application Number Priority Date Filing Date Title
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Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN107488347A (en) * 2017-09-15 2017-12-19 广州维邦新材料科技有限公司 A kind of ultra-toughness wear resistant nylon 6 and preparation method thereof
CN109015434A (en) * 2018-07-05 2018-12-18 盐城市丰实金属磨料有限公司 A kind of nylon ball and preparation method thereof and purposes
CN112812551A (en) * 2021-01-07 2021-05-18 江苏必得科技股份有限公司 Preparation method of high-strength glass fiber composite material applied to rail transit

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CN101250322A (en) * 2008-04-11 2008-08-27 南京聚隆化学实业有限责任公司 Nylon engineering plastic for high-speed railway rail fastening and method for manufacturing same
CN102061088A (en) * 2010-12-10 2011-05-18 南京聚隆科技股份有限公司 Nylon engineering plastics for high-speed transit railway track and manufacture method thereof
CN102863782A (en) * 2012-09-28 2013-01-09 合肥杰事杰新材料股份有限公司 Reinforced and toughened nylon composite used for high-speed railways and preparation method for composite
CN103059559A (en) * 2013-01-07 2013-04-24 株洲时代新材料科技股份有限公司 High-strength and flame-retardation thermoplastic composite material for subway tunnel platform, and preparation method of composite sheet thereof

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CN101250322A (en) * 2008-04-11 2008-08-27 南京聚隆化学实业有限责任公司 Nylon engineering plastic for high-speed railway rail fastening and method for manufacturing same
CN102061088A (en) * 2010-12-10 2011-05-18 南京聚隆科技股份有限公司 Nylon engineering plastics for high-speed transit railway track and manufacture method thereof
CN102863782A (en) * 2012-09-28 2013-01-09 合肥杰事杰新材料股份有限公司 Reinforced and toughened nylon composite used for high-speed railways and preparation method for composite
CN103059559A (en) * 2013-01-07 2013-04-24 株洲时代新材料科技股份有限公司 High-strength and flame-retardation thermoplastic composite material for subway tunnel platform, and preparation method of composite sheet thereof

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Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN107488347A (en) * 2017-09-15 2017-12-19 广州维邦新材料科技有限公司 A kind of ultra-toughness wear resistant nylon 6 and preparation method thereof
CN109015434A (en) * 2018-07-05 2018-12-18 盐城市丰实金属磨料有限公司 A kind of nylon ball and preparation method thereof and purposes
CN112812551A (en) * 2021-01-07 2021-05-18 江苏必得科技股份有限公司 Preparation method of high-strength glass fiber composite material applied to rail transit
CN112812551B (en) * 2021-01-07 2022-04-22 江苏必得科技股份有限公司 Preparation method of high-strength glass fiber composite material applied to rail transit

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Application publication date: 20150610