CN103627164A - Aramid fiber-reinforced high-temperature-resistant nylon composite material and preparation method thereof - Google Patents

Aramid fiber-reinforced high-temperature-resistant nylon composite material and preparation method thereof Download PDF

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Publication number
CN103627164A
CN103627164A CN201210298290.3A CN201210298290A CN103627164A CN 103627164 A CN103627164 A CN 103627164A CN 201210298290 A CN201210298290 A CN 201210298290A CN 103627164 A CN103627164 A CN 103627164A
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aramid fiber
high temperature
temperature resistant
resistant nylon
composite material
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李宗仁
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Shanghai Genius Advanced Materials Group Co Ltd
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Shanghai Genius Advanced Materials Group Co Ltd
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    • 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
    • C08L77/06—Polyamides derived from polyamines and polycarboxylic acids
    • 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
    • B29B9/00—Making granules
    • B29B9/12—Making granules characterised by structure or composition
    • B29B9/14—Making granules characterised by structure or composition fibre-reinforced
    • 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
    • B29B7/74—Mixing; Kneading using other mixers or combinations of mixers, e.g. of dissimilar mixers ; Plant
    • B29B7/7461—Combinations of dissimilar mixers
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
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    • 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
    • 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
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    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
    • 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
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    • C08J5/00—Manufacture of articles or shaped materials containing macromolecular substances
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    • C08L51/00—Compositions of graft polymers in which the grafted component is obtained by reactions only involving carbon-to-carbon unsaturated bonds; Compositions of derivatives of such polymers
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    • C08L51/00—Compositions of graft polymers in which the grafted component is obtained by reactions only involving carbon-to-carbon unsaturated bonds; Compositions of derivatives of such polymers
    • C08L51/06—Compositions of graft polymers in which the grafted component is obtained by reactions only involving carbon-to-carbon unsaturated bonds; Compositions of derivatives of such polymers grafted on to homopolymers or copolymers of aliphatic hydrocarbons containing only one carbon-to-carbon double bond
    • 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
    • B29B7/46—Mixing; Kneading continuous, with mechanical mixing or kneading devices with movable mixing or kneading devices rotary with more than one shaft
    • 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
    • B29B9/00—Making granules
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    • B29B9/06—Making granules by dividing preformed material in the form of filamentary material, e.g. combined with extrusion
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    • 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
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    • B29C2948/92—Measuring, controlling or regulating
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    • 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
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    • C08J2377/00—Characterised by the use of polyamides obtained by reactions forming a carboxylic amide link in the main chain; Derivatives of such polymers
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    • C08J2451/00—Characterised by the use of graft polymers in which the grafted component is obtained by reactions only involving carbon-to-carbon unsaturated bonds; Derivatives of such polymers
    • C08J2451/06—Characterised by the use of graft polymers in which the grafted component is obtained by reactions only involving carbon-to-carbon unsaturated bonds; Derivatives of such polymers grafted on to homopolymers or copolymers of aliphatic hydrocarbons containing only one carbon-to-carbon double bond
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    • C08J2477/00—Characterised by the use of polyamides obtained by reactions forming a carboxylic amide link in the main chain; Derivatives of such polymers
    • C08J2477/10—Polyamides derived from aromatically bound amino and carboxyl groups of amino carboxylic acids or of polyamines and polycarboxylic acids
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Abstract

The invention discloses an aramid fiber-reinforced high-temperature-resistant nylon composite material and a preparation method thereof. The composite material is prepared from an aramid fiber, high-temperature-resistant nylon, a compatilizer, processing aids and the like through mixing and then melt blending and extrusion by a screw. The composite material prepared in the invention has excellent heat resistance, mechanical properties and flame retardation and is extensively used in fields like electric products, automobiles and the war industry. The composite material is prepared through extrusion by the screw; the preparation method has the advantages of simple process, high continuous production efficiency and stable product quality.

Description

A kind of aramid fiber strengthens high temperature resistant nylon composite material and preparation method thereof
Technical field
The invention belongs to processing of high molecular material technical field, be specifically related to a kind of aramid fiber and strengthen high temperature resistant nylon composite material and preparation method thereof.
Background technology
High temperature resistant nylon product mainly comprises 6T, 7T, 8T, 9T, 10T, the 12T etc. in semiaromatic polyamide composition, prepared through melt phase polycondensation by the dicarboxylic acid with aromatic ring and aliphatie diamine, it is owing to having introduced aromatic nucleus in polymeric amide molecular backbone chain, thereby thermotolerance and mechanical property have been improved, reduced water-intake rate, and there is more suitable cost performance, be the high resin of thermotolerance between general engineering plastic nylon and thermostability engineering plastic PEEK, be mainly used in automobile and electric and electronic industry.Along with high-tech, develop rapidly, its application has new breakthrough and progress, and the market requirement is in rising trend.
At present existing is mainly inorganic glass fiber for strengthening the filler of high temperature resistant nylon, but due to some shortcomings in glass fibre self structure and performance, such as the consistency of itself and high temperature resistant nylon resin matrix is poor, in resin matrix, skewness and fibre reinforcement easily expose etc., bring very large problem to follow-up processing, therefore limited its application aspect enhancing high temperature resistant nylon.
Aramid fiber is a kind of novel high-tech organic synthetic fibers, it has superstrength, high-modulus, high temperature resistant, acid-fast alkali-proof and the good performance such as lightweight, its intensity is 5 ~ 6 times of steel wire, modulus is steel wire or glass fibre 2 ~ 3 times, toughness is 2 times of steel wire, and weight is only 1/5 left and right of steel wire, at the temperature of 560 ℃, does not decompose and do not melt; It also has good insulativity and ageing resistance, has very long life cycle; In addition aramid fiber also has excellent flame retardant properties, and its limiting oxygen index(LOI) (LOI) is greater than 28, while leaving flame, can not burn away, and also can not produce molten drop.Himself chemical structure of reason determines, so aramid fiber is a kind of permanent fire retardant fiber.Because aramid fiber is the organic synthetic fibers that contains amido linkage, according to similar compatibility principle, can obtain aramid fiber and high temperature resistant nylon matrix should have good consistency; In addition aramid fiber is after isocyanic ester is processed, surface can produce free amino group group, also can there is good consistency with high temperature resistant nylon matrix, the consistency that aramid fiber and high temperature resistant nylon are good can make fiber be uniformly distributed in high temperature resistant nylon matrix, and effectively improves corpus fibrosum and expose phenomenon.Therefore aramid fiber is a kind of very promising filler for high temperature resistant nylon.
Summary of the invention
The first object of the present invention is to provide a kind of aramid fiber and strengthens high temperature resistant nylon composite material, to solve in prior art with glass fibre, strengthens the defects such as the consistency that the shortcoming due in glass fibre self structure and performance that high temperature resistant nylon exists causes is poor, filler distribution is uneven, fibre reinforcement easily exposes and the technical problem of the following process inconvenience that brings thus.
The second object of the present invention is to provide the preparation method that a kind of aramid fiber strengthens high temperature resistant nylon composite material, to solve in prior art with glass fibre, strengthens the defects such as the consistency that the shortcoming due in glass fibre self structure and performance that high temperature resistant nylon exists causes is poor, filler distribution is uneven, fibre reinforcement easily exposes and the technical problem of the following process inconvenience that brings thus.
Technical scheme of the present invention is as follows:
Aramid fiber strengthens a high temperature resistant nylon composite material, by the component that comprises following weight part, is made:
10 ~ 30 parts of aramid fibers;
70 ~ 90 parts of high temperature resistant nylons;
1 ~ 20 part of compatilizer;
1 ~ 3 part of processing aid.
Preferably, described aramid fiber is meta-aramid raw white short fiber, and through isocyanic ester, processes before use.
Preferably, the described isocyanic ester that aramid fiber is processed is selected from one or more in diphenylmethanediisocyanate (MDI), 2,4 toluene diisocyanate (TDI) and hexamethylene diisocyanate (HDI).
Preferably, described high temperature resistant nylon is selected from one or more in PA6T, PA7T, PA8T, PA9T, PA10T, PA12T, is preferably PA10T.
Preferably, described compatilizer is selected from one or more in maleic anhydride graft SEBS, maleic anhydride graft vinylbenzene, maleic anhydride grafted ethene-octene copolymer.
Preferably, described processing aid is the phenols high-temperature antioxidant of mass ratio 1:1 and the mixture of stearic acid lubricant.
Preferably, described phenols high-temperature antioxidant is selected from four [β-(3,5-di-tert-butyl-hydroxy phenyl) propionic acid] pentaerythritol ester (antioxidant 1010), β-(3,5-di-tert-butyl-hydroxy phenyl) the positive octadecanol ester of propionic acid (antioxidant 1076), 1,3,5-tri-(the 4-tertiary butyl-3-hydroxyl-2,6-dimethyl benzyl)-1,3,5-triazine-2,4,6-(1H, 3H, 5H) one or more in-triketone (oxidation inhibitor 1790).
Preferably, described stearic acid lubricant is selected from one or more in stearylamide, stearic acid, Zinic stearas and calcium stearate, preferably calcium stearate.
Above-mentioned aramid fiber strengthens a preparation method for high temperature resistant nylon composite material, comprises the steps:
The first step, the processing of aramid fiber and high temperature resistant nylon dry, wherein
Aramid fiber is processed: aramid fiber is processed with isocyanic ester, and preferably, aramid fiber accounts for 30% ~ 50% of isocyanic ester part by weight, with distilled water and dehydrated alcohol, clean afterwards, in order to guarantee to clean thoroughly, can adopt a large amount of distilled water and dehydrated alcohol to clean, drying for standby after cleaning;
High temperature resistant nylon is dry: high temperature resistant nylon is put into loft drier, and 100 ~ 130 ℃ are dried 4 ~ 8 hours, and this process is preferably used vacuum drying oven; Wherein
Being dried in no particular order of the processing of aramid fiber and high temperature resistant nylon, can first carry out the processing of aramid fiber and carry out again the dry of high temperature resistant nylon, also can first carry out the dry of high temperature resistant nylon and carry out again the processing of aramid fiber, or the dry of the processing of aramid fiber and high temperature resistant nylon carries out simultaneously;
Second step, takes dried raw material and auxiliary agent by following weight part:
10 ~ 30 parts of aramid fibers,
70 ~ 90 parts of high temperature resistant nylons,
1 ~ 20 part of compatilizer,
1 ~ 3 part of processing aid;
The 3rd step, by load weighted high temperature resistant nylon, compatilizer and processing aid by the high-speed mixer mixture that stirs to obtain, mixing speed 500 ~ 800r/min, mixing time 3 ~ 8 minutes;
The 4th step, the mixture that the 3rd step is obtained joins in screw extrusion press, melt blending extruding pelletization weigh with second step the aramid fiber obtaining at 270～330 ℃ of temperature together with, wherein aramid fiber adds at the Special feeding mouth of screw extrusion press, obtains aramid fiber and strengthens high temperature resistant nylon composite material.
Preferably, in the 4th described step, screw extrusion press is twin screw extruder, and melt blending temperature is 285 ~ 315 ℃.
Compared with prior art, beneficial effect of the present invention is as follows:
The first, the present invention adopts aramid fiber as the reinforcing filler of high temperature resistant nylon, because aramid fiber has excellent flame retardant properties, for from fire retardant material, so the aramid fiber obtaining strengthens high temperature resistant nylon composite material, has certain flame retardant properties;
Second, the present invention adopts aramid fiber as the reinforcing filler of high temperature resistant nylon, because aramid fiber has excellent resistance toheat and very high intensity, so strengthening high temperature resistant nylon composite material, the aramid fiber obtaining there is excellent resistance toheat and mechanical property;
The 3rd, the preparation of matrix material of the present invention adopts twin screw extruder, and its preparation method and technique are simple, easy handling, and production efficiency is high continuously, constant product quality.
Certainly, implement arbitrary product of the present invention and might not need to reach above-described all advantages simultaneously.
Embodiment
Below in conjunction with specific embodiment, further set forth the present invention.Should be appreciated that, these embodiment are only for the present invention is described, and are not intended to limit the scope of the invention.Technician makes according to the present invention in actual applications improvement and adjustment, still belong to protection scope of the present invention.
Embodiment 1
The production aramid fiber adopting in the present embodiment strengthens high temperature resistant nylon composite material major equipment used to be had:
High-speed mixer, rotating speed 450 ~ 1350r/min;
Twin screw extruder, screw speed: 230 ~ 400rpm, design temperature: 285 ~ 305 ℃;
Tank: 25 ~ 45 ℃ of temperature of cooling water, dicing machine rotating speed: 400 ~ 800rpm;
High temperature resistant nylon selects PA10T ，You Shanghai Genius New Material (Group) Co., Ltd. to provide, and puts it in loft drier before use, and 100 ℃ are dried 8 hours.
The Tametar meta-aramid raw white short fiber that aramid fiber selects Yantai calm and peaceful novel material company to provide, processes with diphenylmethanediisocyanate before using, and the part by weight that aramid fiber accounts for diphenylmethanediisocyanate is 30%.
Compatilizer is selected maleic anhydride graft SEBS;
Processing aid is selected the mixture of phenols high-temperature antioxidant and stearic acid lubricant mass ratio 1:1, and wherein phenols high-temperature antioxidant is antioxidant 1010, and stearic acid lubricant is calcium stearate.
In the present embodiment, each raw material adopts following weight part to weigh:
10 parts of aramid fibers,
70 parts of high temperature resistant nylons,
20 parts of compatilizers,
3 parts of processing aids;
To load weighted high temperature resistant nylon according to the above ratio, compatilizer and processing aid are put into high-speed mixer and under 800r/min speed conditions, are mixed after 5 minutes, join in twin screw extruder, melt blending extruding pelletization together with the aramid fiber of the processing obtaining with above-mentioned weighing at 285 ~ 305 ℃, the aramid fiber of processing is four of twin screw extruder, five joint cartridge openings places add, aramid fiber enters into the twin screw extruder that is full of plasticizing melt, fully mix with melt, infiltrate, be dispersed in high temperature resistant nylon melt, then through die extrusion, the cooling rear pelletizing of tie rod, the aramid fiber that can obtain the present embodiment strengthens high temperature resistant nylon composite material.Wherein
Twin-screw extrusion process for machining is as follows: 275 ± 10 ℃ of district's temperature, two 285 ± 10 ℃ of district's temperature 275 ± 10 ℃， tri-district's temperature 280 ± 10 ℃， tetra-district's temperature, five 295 ± 10 ℃ of district's temperature, six 290 ± 10 ℃ of district's temperature 295 ± 10 ℃， seven district's temperature 295 ± 10 ℃， eight district's temperature, nine 285 ± 10 ℃ of district's temperature, ten 285 ± 10 ℃ of district's temperature, head temperature is 285 ± 10 ℃, 250 ~ 350 revs/min of screw speeds.
Embodiment 2
The difference of the present embodiment and embodiment 1 is, each raw material adopts following weight part to weigh:
20 parts of aramid fibers,
70 parts of high temperature resistant nylons,
20 parts of compatilizers,
3 parts of processing aids.
High temperature resistant nylon selects PA9T ，You Shanghai Genius New Material (Group) Co., Ltd. to provide.
All the other various processes are identical with embodiment 1.
Embodiment 3
The difference of the present embodiment and embodiment 1 is, each raw material adopts following weight part to weigh:
30 parts of aramid fibers,
70 parts of high temperature resistant nylons,
20 parts of compatilizers,
3 parts of processing aids.
All the other various processes are identical with embodiment 1.
To embodiment 1-embodiment 3 products obtained therefroms, adopt ASTM standard to detect its comprehensive mechanical property and flame retardant properties, comprise tensile strength, flexural strength, modulus in flexure, Izod notched Izod impact strength and heat-drawn wire.Test result sees the following form 1.
Table 1
Figure 86941DEST_PATH_IMAGE001
As seen from Table 1, the aramid fiber of usining in the embodiment of the present invention is all improved largely with respect to high temperature resistant nylon matrix as mechanical property, resistance to elevated temperatures and the flame retardant properties of adding the aramid fiber/high temperature resistant nylon composite material of toughener, and along with the increase of aramid fiber addition, the mechanical property of aramid fiber/high temperature resistant nylon composite material, resistance to elevated temperatures and flame retardant properties improve gradually.
Embodiment 4
High temperature resistant nylon selects PA6T ，You Shanghai Genius New Material (Group) Co., Ltd. to provide, and it is dried 4 hours at 130 ℃ before use.
The Tametar meta-aramid raw white short fiber that aramid fiber selects Yantai calm and peaceful novel material company to provide, processes with 2,4 toluene diisocyanate before using, and the part by weight that aramid fiber accounts for 2,4 toluene diisocyanate is 50%.
Compatilizer is selected: maleic anhydride grafted ethene-octene copolymer;
Processing aid is selected the mixture of phenols high-temperature antioxidant and stearic acid lubricant mass ratio 1:1, and wherein phenols high-temperature antioxidant is antioxidant 1076, and stearic acid lubricant is Zinic stearas.
In the present embodiment, each raw material adopts following weight part to weigh:
10 parts of aramid fibers,
80 parts of high temperature resistant nylons,
1 part of compatilizer,
3 parts of processing aids;
To load weighted high temperature resistant nylon according to the above ratio, compatilizer and processing aid are put into high-speed mixer and under 500r/min speed conditions, are mixed after 8 minutes, join in twin screw extruder, melt blending extruding pelletization together with the aramid fiber of the processing obtaining with above-mentioned weighing at 285 ~ 315 ℃, the aramid fiber of processing is four of twin screw extruder, five joint cartridge openings places add, aramid fiber enters into the twin screw extruder that is full of plasticizing melt, fully mix with melt, infiltrate, be dispersed in high temperature resistant nylon melt, then through die extrusion, the cooling rear pelletizing of tie rod, the aramid fiber that can obtain the present embodiment strengthens high temperature resistant nylon composite material.
Embodiment 5
High temperature resistant nylon selects PA7T ，You Shanghai Genius New Material (Group) Co., Ltd. to provide, and it is dried 6 hours at 120 ℃ before use.
The Tametar meta-aramid raw white short fiber that aramid fiber selects Yantai calm and peaceful novel material company to provide, processes with hexamethylene diisocyanate before using, and the part by weight that aramid fiber accounts for hexamethylene diisocyanate is 40%.
Compatilizer is selected: maleic anhydride graft SEBS;
Processing aid is selected the mixture of phenols high-temperature antioxidant and stearic acid lubricant 1:1, and wherein phenols high-temperature antioxidant is oxidation inhibitor 1790, and stearic acid lubricant is stearylamide.
In the present embodiment, each raw material adopts following weight part to weigh:
10 parts of aramid fibers,
80 parts of high temperature resistant nylons,
10 parts of compatilizers,
1 part of processing aid;
To load weighted high temperature resistant nylon according to the above ratio, compatilizer and processing aid are put into high-speed mixer and under 500r/min speed conditions, are mixed after 8 minutes, join in twin screw extruder, melt blending extruding pelletization together with the aramid fiber of the processing obtaining with above-mentioned weighing at 285 ~ 315 ℃, the aramid fiber of processing is four of twin screw extruder, five joint cartridge openings places add, aramid fiber enters into the twin screw extruder that is full of plasticizing melt, fully mix with melt, infiltrate, be dispersed in high temperature resistant nylon melt, then through die extrusion, the cooling rear pelletizing of tie rod, the aramid fiber that can obtain the present embodiment strengthens high temperature resistant nylon composite material.
Embodiment 6
High temperature resistant nylon selects PA8T ，You Shanghai Genius New Material (Group) Co., Ltd. to provide, and it is dried 6 hours at 110 ℃ before use.
The Tametar meta-aramid raw white short fiber that aramid fiber selects Yantai calm and peaceful novel material company to provide, use front with 1, hexamethylene-diisocyanate and diphenylmethanediisocyanate (mass ratio 1:1) mixture process, the part by weight that aramid fiber accounts for mixture is 45%.
Compatilizer is selected maleic anhydride graft SEBS and maleic anhydride grafted ethene-octene copolymer, and both press 1:1 blend;
Processing aid is selected the mixture of phenols high-temperature antioxidant and stearic acid lubricant mass ratio 1:1, and wherein phenols high-temperature antioxidant is oxidation inhibitor 1790, and stearic acid lubricant is stearic acid.
In the present embodiment, each raw material adopts following weight part to weigh:
20 parts of aramid fibers,
90 parts of high temperature resistant nylons,
15 parts of compatilizers,
2 parts of processing aids;
To load weighted high temperature resistant nylon according to the above ratio, compatilizer and processing aid are put into high-speed mixer and under 800r/min speed conditions, are mixed after 3 minutes, join in twin screw extruder, melt blending extruding pelletization together with the aramid fiber of the processing obtaining with above-mentioned weighing at 270 ~ 300 ℃, the aramid fiber of processing is four of twin screw extruder, five joint cartridge openings places add, aramid fiber enters into the twin screw extruder that is full of plasticizing melt, fully mix with melt, infiltrate, be dispersed in high temperature resistant nylon melt, then through die extrusion, the cooling rear pelletizing of tie rod, the aramid fiber that can obtain the present embodiment strengthens high temperature resistant nylon composite material.
Embodiment 7
The difference of the present embodiment and embodiment 6 is, high temperature resistant nylon selects PA12T ，You Shanghai Genius New Material (Group) Co., Ltd. to provide, its before use 100 ℃ dry 6 hours.
The foregoing is only preferred embodiments of the present invention; but protection scope of the present invention is not limited to this; variation or the replacement that in the technical scope that those skilled in the art disclose in the present invention, can expect easily, within all should dropping on protection scope of the present invention.Protection scope of the present invention is as the criterion with the protection domain that claim was defined.

Claims (10)

1. aramid fiber strengthens a high temperature resistant nylon composite material, it is characterized in that, by the component that comprises following weight part, is made:
10 ~ 30 parts of aramid fibers;
70 ~ 90 parts of high temperature resistant nylons;
1 ~ 20 part of compatilizer;
1 ~ 3 part of processing aid.
2. aramid fiber according to claim 1 strengthens high temperature resistant nylon composite material, it is characterized in that, described aramid fiber is meta-aramid raw white short fiber, and it is processed through isocyanic ester before use.
3. aramid fiber according to claim 2 strengthens high temperature resistant nylon composite material, it is characterized in that, the described isocyanic ester that aramid fiber is processed is selected from one or more in diphenylmethanediisocyanate, 2,4 toluene diisocyanate and hexamethylene diisocyanate.
4. aramid fiber according to claim 1 strengthens high temperature resistant nylon composite material, it is characterized in that, described high temperature resistant nylon is selected from one or more in PA6T, PA7T, PA8T, PA9T, PA10T, PA12T.
5. aramid fiber according to claim 1 strengthens high temperature resistant nylon composite material, it is characterized in that, described compatilizer is selected from one or more in maleic anhydride graft SEBS, maleic anhydride graft vinylbenzene, maleic anhydride grafted ethene-octene copolymer.
6. according to the aramid fiber described in right 1, strengthen high temperature resistant nylon composite material, it is characterized in that, described processing aid is the phenols high-temperature antioxidant of mass ratio 1:1 and the mixture of stearic acid lubricant.
7. aramid fiber according to claim 6 strengthens high temperature resistant nylon composite material, it is characterized in that, described phenols high-temperature antioxidant is selected from four [β-(3,5-di-tert-butyl-hydroxy phenyl) propionic acid] pentaerythritol ester, the positive octadecanol ester of β-(3,5-di-tert-butyl-hydroxy phenyl) propionic acid, 1,3,5-tri-(the 4-tertiary butyl-3-hydroxyl-2,6-dimethyl benzyl)-1,3,5-triazines-2,4, one or more in 6-(1H, 3H, 5H)-triketone.
8. aramid fiber according to claim 6 strengthens high temperature resistant nylon composite material, it is characterized in that, described stearic acid lubricant is selected from one or more in stearylamide, stearic acid, Zinic stearas and calcium stearate.
9. aramid fiber claimed in claim 1 strengthens a preparation method for high temperature resistant nylon composite material, it is characterized in that, comprises the steps:
The first step, the processing of aramid fiber and high temperature resistant nylon dry, wherein
Aramid fiber is processed: aramid fiber processed with isocyanic ester, with distilled water and dehydrated alcohol, cleaned afterwards, and drying for standby;
High temperature resistant nylon is dry: high temperature resistant nylon is put into loft drier, and 100 ~ 130 ℃ are dried 4 ~ 8 hours;
Second step, takes dried raw material and auxiliary agent by following weight part:
10 ~ 30 parts of aramid fibers,
70 ~ 90 parts of high temperature resistant nylons,
1 ~ 20 part of compatilizer,
1 ~ 3 part of processing aid;
The 3rd step, by load weighted high temperature resistant nylon, compatilizer and processing aid by the high-speed mixer mixture that stirs to obtain, mixing speed 500 ~ 800r/min, mixing time 3 ~ 8 minutes;
The 4th step, the mixture that the 3rd step is obtained joins in screw extrusion press, melt blending extruding pelletization weigh with second step the aramid fiber obtaining at 270 ~ 330 ℃ of temperature together with, wherein aramid fiber adds at the Special feeding mouth of screw extrusion press, obtains aramid fiber and strengthens high temperature resistant nylon composite material.
10. aramid fiber according to claim 9 strengthens the preparation method of high temperature resistant nylon composite material, it is characterized in that, in the 4th described step, screw extrusion press is twin screw extruder, and melt blending temperature is 285 ~ 315 ℃.
CN201210298290.3A 2012-08-21 2012-08-21 Aramid fiber-reinforced high-temperature-resistant nylon composite material and preparation method thereof Pending CN103627164A (en)

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CN108267189A (en) * 2018-03-29 2018-07-10 杭州亦品电子有限公司 Gas sensor attachment device and preparation method thereof
CN109517380A (en) * 2018-11-29 2019-03-26 上海金发科技发展有限公司 A kind of halogen-free flame-retardant reinforced nylon composite material that wet and heat ageing resistant is precipitated
CN111171543A (en) * 2019-12-23 2020-05-19 上海普利特伴泰材料科技有限公司 Reinforced PC/ABS composite material for sound absorption and damping and preparation method thereof
CN113463396A (en) * 2021-07-01 2021-10-01 黑龙江弘宇短纤维新材料股份有限公司 Aramid short fiber for nylon resin product and preparation method thereof
WO2022038518A1 (en) * 2020-08-20 2022-02-24 3M Innovative Properties Company Melt-processable, impact resistant fiber-reinforced composite materials

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CN102276982A (en) * 2011-07-01 2011-12-14 株洲时代新材料科技股份有限公司 Polyphenylene sulfide and high-temperature-resistant nylon complex and preparation method thereof
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CN101200591A (en) * 2006-12-15 2008-06-18 上海杰事杰新材料股份有限公司 Fast-flow high temperature resistant nylon composite material
CN102276982A (en) * 2011-07-01 2011-12-14 株洲时代新材料科技股份有限公司 Polyphenylene sulfide and high-temperature-resistant nylon complex and preparation method thereof
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Cited By (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN108267189A (en) * 2018-03-29 2018-07-10 杭州亦品电子有限公司 Gas sensor attachment device and preparation method thereof
CN108267189B (en) * 2018-03-29 2024-05-17 浙江弘载电子有限公司 Gas sensor connecting device and preparation method thereof
CN109517380A (en) * 2018-11-29 2019-03-26 上海金发科技发展有限公司 A kind of halogen-free flame-retardant reinforced nylon composite material that wet and heat ageing resistant is precipitated
CN111171543A (en) * 2019-12-23 2020-05-19 上海普利特伴泰材料科技有限公司 Reinforced PC/ABS composite material for sound absorption and damping and preparation method thereof
CN111171543B (en) * 2019-12-23 2022-05-24 上海普利特伴泰材料科技有限公司 Reinforced PC/ABS composite material for sound absorption and damping and preparation method thereof
WO2022038518A1 (en) * 2020-08-20 2022-02-24 3M Innovative Properties Company Melt-processable, impact resistant fiber-reinforced composite materials
CN113463396A (en) * 2021-07-01 2021-10-01 黑龙江弘宇短纤维新材料股份有限公司 Aramid short fiber for nylon resin product and preparation method thereof

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