CN109912877A - A kind of anti-aging EVA foamed material of high temperature resistant and its preparation method and application - Google Patents
A kind of anti-aging EVA foamed material of high temperature resistant and its preparation method and application Download PDFInfo
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Abstract
The present invention provides anti-aging EVA foamed material of a kind of high temperature resistant and its preparation method and application, which is made by the compound material of EVA is foamed, and the compound material of EVA includes: 40~50 parts of EVA；10~55 parts of AEM rubber；10~20 parts of polyolefin elastomer；10~20 parts of ethylene octene block copolymer；0.5~0.8 part of peroxide cross-linking agent；3~5 parts of foaming agent；1~4 part of activating agent；3~12 parts of reinforcing agent.The percent thermal shrinkage of foamed material described in the embodiment of the present invention is 0.6~1%, lower than the percent thermal shrinkage of traditional EVA foamed material.For foamed material of the present invention after aging under hot-air, permanent compression set change rate, mechanical property change rate and firmness change rate are below 20%, maintain the original performance of material well, have good high temperature resistant ageing resistance.And the materials processing temperature is low, is conducive to subsequent fitting.
Description
Technical field
The present invention relates to footwear product field of material technology more particularly to a kind of anti-aging EVA foamed material of high temperature resistant and
Preparation method and application.
Background technique
Athletic shoe sole is usually made of outsole and indsole, wherein outsole refers to the layer structure directly with ground face contact, leads to
It is often used natural rubber or artificial rubber is made, have the function of anti-skidding, wear-resisting and resistant to bending etc..Indsole then generally refers to insole
Structure between outsole, the effects of primarily serving support or spring back.Currently, indsole is mainly total using ethylene vinyl acetate
Polymers (EVA), styrene series thermoplastic elastomer (SBS), ethylene octene block copolymer (OBC), thermoplastic polyurethane (TPU)
The foaming structure of equal thermoplastic elastic materials preparation.
Wherein, conventional EVA foamed material is mainly total by the materials such as EVA, POE, EPDM (ethylene propylene diene rubber), SEBS
It is mixed to foam.Under hot air condition, EVA, POE, EPDM, SEBS etc. are low melting point polymers, at high temperature polymer from
Glassy state changes to elastomeric state and is softened, and causes conventional EVA foamed material that biggish thermal contraction occurs, and then occurs every
Phenomena such as mechanical property is deteriorated, compression set increases has very big obstacle and limitation to subsequent production and use.
Existing conventional improved method is usually that the polyolefin block of high temperature resistant lower shrinkage is introduced in EVA foaming system
Copolymer OBC.Although such improvement can improve the problem of product is shunk, the fusing point of OBC is 120 DEG C, and processing temperature is high, no
Easy processing, and OBC is non-polar polymer, and additive amount is big, is unfavorable for subsequent attaching process of middle bottom material etc..
Summary of the invention
In view of this, the application provides a kind of anti-aging EVA foamed material of high temperature resistant and its preparation method and application, this hair
The EVA foamed material of bright offer has excellent high temperature resistant ageing resistance, and processing temperature is low, is conducive to subsequent fitting.
The present invention provides a kind of anti-aging EVA foamed material of high temperature resistant, is made by the compound material of EVA is foamed, described
The compound material of EVA includes the component of following parts by weight:
40~50 parts of ethylene vinyl acetate copolymer；
10~55 parts of AEM rubber；
10~20 parts of polyolefin elastomer；
10~20 parts of ethylene octene block copolymer；
0.5~0.8 part of peroxide cross-linking agent；
3~5 parts of foaming agent；
1~4 part of activating agent；
3~12 parts of reinforcing agent.
Preferably, the compound material of the EVA includes 30~50 parts of AEM rubber；Methyl acrylate matter in the AEM rubber
Measuring content is 8%~40%.
Preferably, VA mass content is 18%~28% in the ethylene vinyl acetate copolymer.
Preferably, the peroxide cross-linking agent is cumyl peroxide and Isosorbide-5-Nitrae-dual-tert-butyl cumene hydroperoxide
One of or it is a variety of.
Preferably, the foaming agent is one of azodicarbonamide, 4,4- oxo, two benzene sulfonyl hydrazide and white hair infusion
Or it is a variety of.
Preferably, the activating agent includes stearic acid, zinc stearate and zinc oxide.
Preferably, the compound material of the EVA includes 5~10 parts of reinforcing agent；The reinforcing agent is white carbon black.
The present invention provides the preparation method of the anti-aging EVA foamed material of high temperature resistant as described above, comprising the following steps:
The compound material of the EVA is successively kneaded and is granulated, it is then foamed, obtain the anti-aging EVA hair of high temperature resistant
Foam material.
The present invention provides the anti-aging EVA foamed material of high temperature resistant as described above and is preparing the application in Sports shoe sole.
Compared with prior art, the anti-aging EVA foamed material of high temperature resistant provided by the invention is by the compound material foaming system of EVA
, it is mainly used as the middle bottom material of sport footwear, the compound material of the EVA is mainly ethylene vinyl acetate copolymer (EVA tree
Rouge), and the ageing-resistant AEM rubber of the thermostable that centainly matches wherein is being introduced, it is handed in conjunction with POE, OBC etc. by chemistry
Connection foaming preparation.The percent thermal shrinkage of EVA foamed material described in the embodiment of the present invention is 0.6%~1%, is sent out lower than tradition EVA
The percent thermal shrinkage of foam material.Also, EVA foamed material of the present invention is after aging under 150 DEG C, 6h hot-air, permanent compression
Deformation change rate, mechanical property change rate and firmness change rate are below 20%, maintain original performance of material well,
With good high temperature resistant ageing resistance.Meanwhile wherein the AEM rubber introduced with polar lateral chain of ester group, is conducive to and rubber
The fitting such as glue bottom；The addition of AEM rubber nor affects on the process operation performance of EVA foamed material.
Detailed description of the invention
Fig. 1 is the rate of change of the density comparison diagram after foamed material heat ageing described in embodiment and comparative example；
Fig. 2 is the firmness change rate comparison diagram after foamed material heat ageing described in embodiment and comparative example；
Fig. 3 is the tensile strength change rate comparison diagram after foamed material heat ageing described in embodiment and comparative example；
Fig. 4 is the tearing strength change rate comparison diagram after foamed material heat ageing described in embodiment and comparative example；
Fig. 5 is the elongation at break change rate comparison diagram after foamed material heat ageing described in embodiment and comparative example；
Fig. 6 is the rebound change rate comparison diagram after foamed material heat ageing described in embodiment and comparative example；
Fig. 7 is the compressive deformation change rate comparison diagram after foamed material heat ageing described in embodiment and comparative example.
Specific embodiment
The following is a clear and complete description of the technical scheme in the embodiments of the invention, it is clear that described embodiment
Only a part of the embodiment of the present invention, instead of all the embodiments.Based on the embodiments of the present invention, the common skill in this field
Art personnel every other embodiment obtained without making creative work belongs to the model that the present invention protects
It encloses.
The present invention provides a kind of anti-aging EVA foamed materials of high temperature resistant, are made by the compound material of EVA is foamed, institute
State the component that the compound material of EVA includes following parts by weight:
40~50 parts of ethylene vinyl acetate copolymer；
10~55 parts of AEM rubber；
10~20 parts of polyolefin elastomer；
10~20 parts of ethylene octene block copolymer；
0.5~0.8 part of peroxide cross-linking agent；
3~5 parts of foaming agent；
1~4 part of activating agent；
3~12 parts of reinforcing agent.
EVA foamed material provided by the invention is mainly used as midsole material, has excellent high temperature resistant ageing resistance, and
And processing temperature is low, is conducive to subsequent fitting.The present invention can solve the shortcomings that traditional EVA foamed material non-refractory aging, and
Improve the problems such as conventional high temperature resistant EVA foamed material fitting is poor, process operation is not high.
EVA foamed material provided in an embodiment of the present invention can be described as bottom material in EVA foaming, be by the compound material warp of EVA
Foam process is made.In terms of mass parts, the compound material of EVA includes 40~50 parts of ethylene vinyl acetate copolymer.Institute
It states ethylene vinyl acetate copolymer and be also referred to as ethylene-vinyl acetate copolymer, is obtained by ethylene and vinyl acetate (VA) copolymerization
A kind of thermoplastic resin, English abbreviation EVA.Ethylene-vinyl acetate copolymer has the characteristic that resilience is high, flexibility is good；Tool
Body, VA mass content can be 18%~28% in the ethylene vinyl acetate copolymer.Preferably, the ethylene vinegar
The model of sour ethylene copolymer can are as follows: in EVA 7350M, EVA 7360M, EVA 7470M, 460 Elvax and Elvax 265
It is one or more of.
In the present invention, the compound material of the EVA includes: 10~20 parts of polyolefin elastomer；10~20 parts of ethylene
Octene block copolymer.OBC is the English abbreviation of ethylene-octene block copolymer, and hard section therein is high density polyethylene (HDPE)；Second
The hard segment content range of alkene octene block copolymer OBC is 20%~30%, and preferably kind has: Infuse 9107, Infuse
9000 etc..
Wherein, polyolefin elastomer (Polyolefin elastomer) (POE) is DOW chemical company, the U.S., Yi Maojin
Belong to the thermoplastic elastomer (TPE) being distributed with narrow molecular weight distribution and uniform short-chain branch for catalyst synthesis, there is rubber
The spies such as glue and resin are in the structure of two-phase laminated flow, it has, and density is small, light weight, and tearing toughness excellent performance, resilience are superior
Point.Preferably, POE includes: the trade mark that crystallinity is 15%~25%, particularly preferred kind has: Engage 8180,
Engage 8150, Engage 8003 etc..
The anti-aging EVA foamed material of high temperature resistant in the prior art, it is embedding according to the alkene of nonpolar high-melting-point (120 DEG C)
The section small improvement of copolymer OBC, OBC additive amount is bad, and if additive amount is big, the high-melting-point of one side OBC influences processing behaviour
Make performance, the nonpolarity of another aspect OBC influences fitting.Improve according to nylon fiber, though heat-resisting quantity can be effectively improved
Can, and do not influence to be bonded, but nylon is highly polar and high-melting-point, causes the compatibility of material and process operation poor.
The application mainly uses the AEM rubber that high temperature resistant anti-aging property is excellent, process operation is functional, polarity is medium
Glue, the high temperature resistant anti-aging property of Lai Gaishan EVA foamed material.Ethylene-acrylate rubber (abbreviation AEM rubber) be with ethylene,
Acrylate is elastomer obtained by main monomer is copolymerized, and main chain is saturated carbon chains, and side group is polar ester groups.
Since the special construction of AEM rubber assigns its many excellent feature: (1) heat aging property: to break elongation
It is measurement standard that rate, which reduces by 50%, and AEM can be used continuously 18 months at 120 DEG C, be used continuously 6 weeks at 170 DEG C；(2) resist
Compression set performance: excellent using the incompressible permanent deformation performance of the AEM ternary glue of amine curing agents or peroxide cure
Good, under the conditions of 170 DEG C × 70h, compression set is less than 20%；(3) weatherability, ozone resistance: the resistance to ozone of AEM rubber
Performance is splendid, and weather resistance is also fine, and after exposure 3 years, appearance and physical property are almost unchanged；(4) cold tolerance: AEM rubber
Glue can use at -40 DEG C, if adding plasticizer appropriate, can also keep soft at lower temperatures；(5) resistance to liquid energy:
AEM rubber has good resistance to automobile auto-steering liquid, gear oil, glycol/water mixed liquor, diesel oil and kerosene etc..It is existing
Have in technology, the application field of AEM rubber is mainly automobile parts, such as front and back crankshaft oil seal, front and back main shaft oil sealing, electronic-controlled power steering
Pump seal, transmission pump seal part, water pump packing part, engine valve stem oil seal, CVJ dust cover and electronic-controlled power steering sebific duct and
175 DEG C of grade radiator rubber hoses.In addition, AEM rubber is also preferable in halide-free low-smoke fireproof cable sheath field application prospect.
In the present invention, on the one hand, AEM rubber has splendid high temperature resistant, resistant to thermal aging, weather-proof, ozone resistance；It is another
The lateral chain of ester group polarity of aspect, AEM rubber is medium, therefore it is good with the compatibility of EVA/POE/OBC etc., and polar ester group
Be conducive to be bonded.Furthermore AEM rubber belongs to rubber, can be kneaded at normal temperature, and processing temperature is low, and Mooney viscosity is medium, adds
How much dosage is than less influencing process operation performance.In process, mixing, mill and single screw rod are granulated mixed the materials such as EVA
The processing temperature of conjunction is generally lower than 100 DEG C of processing, and temperature is too high to be easily caused foaming agent and crosslinking agent premature decomposition and cause
Foaming is abnormal, therefore AEM rubber, compared with OBC and nylon fiber, processing temperature is low, and operability is more preferably.
The compound material of EVA of the present invention includes the AEM rubber of 10~55 mass parts, preferably includes 30~50 parts.Specifically
Ground, methyl acrylate mass content can be 8%~40% in the AEM rubber；Mooney viscosity is 22~29 [ML (1+4) at
100℃].Preferred kind in the embodiment of the present invention has: Vamac Ultra IP, Vamac DP of E.I.Du Pont Company etc..The present invention
Embodiment introduces the vinyl-acrylate copolymer (AEM rubber) that methyl acrylate content is 8%~40%, with ethyl vinyl acetate
Vinyl acetate (EVA), polyolefin elastomer (POE), ethylene octene block copolymer (OBC) etc. are obtained by chemical crosslinking foaming
The anti-aging foamed material of high temperature resistant.
Also, by the way that the intensity of a certain amount of reinforcing agent raising AEM rubber etc. is added, (AEM rubber is non-self-complementary to the present invention
Strong rubber, intensity ratio EVA/POE/OBC etc. are poor), therefore, the present invention is still maintained in the case where possessing excellent resistant to high temperatures
Preferable intensity.In the present invention, the compound material of the EVA includes 3~12 parts of reinforcing agent, preferably includes 5~10 parts of benefit
Strong agent.The reinforcing agent is preferably white carbon black；The BET specific surface area of white carbon black can be 100-300m2/ g is primarily referred to as BET ratio
Surface area is 100-300m2The precipitated silica and fumed silica of/g, the preferably white carbon black of Evonik Degussa Corp.
WL180。
For the EVA foam for obtaining crosslinking of good performance, the compound material of the embodiment of the present invention includes: 0.5~0.8 part
Peroxide cross-linking agent；3~5 parts of foaming agent.The peroxide that the compound material of EVA preferably includes 0.6~0.8 part is handed over
Join agent；The peroxide cross-linking agent is preferably cumyl peroxide (DCP) and 1,4 bis tert butyl peroxy isopropyl benzene
One of (BIPB) or it is a variety of.Specifically, the preferred kind of crosslinking agent has: DCP PERKADOX BC-FF, DCP LUPEROX
DC；BIBP PERKADOX 14S-FL, BIPB F-Flakes etc..
Also, the parts by weight of the foaming agent are preferably 3~4 parts.The foaming agent can include: azodicarbonamide, 4,
One of two benzene sulfonyl hydrazide of 4- oxo and white hair infusion are a variety of, preferably azo foaming agent, and specific trade mark kind is for example
AC6000H。
In the present invention, the effects of compound material of the EVA includes 1~4 part of activating agent, plays promotion foaming, crosslinking.
In a specific embodiment of the present invention, the activating agent includes stearic acid, zinc stearate and zinc oxide；For example, the zinc oxide
It is 0.9~1.3 part, preferably 1~1.2 part, the stearic acid is 0.9~1.3 part, preferably 1~1.2 part, the stearic acid
Zinc is 0.9~1.3 part, preferably 1~1.2 part.The present invention is not particularly limited the source of each component, corresponding using this field
Commercial product；The preferred kind of activating agent has: stearic acid 1801, zinc stearate ZTE, ZnO 997.
The present invention using the compound material formula foaming of above-mentioned EVA, used AEM rubber have splendid high temperature resistant,
Resistant to thermal aging, weather-proof, ozone resistance, so that foamed material percent thermal shrinkage is only 0.6%~1%；And it is permanent at 150 DEG C, 6h
Compressive deformation change rate, mechanical property change rate and firmness change rate are below 20%, preferably maintain the original of material
Performance.The processing temperature of AEM rubber used in the present invention is low, and Mooney viscosity is medium, and additive amount does not influence process operation performance.Institute
The AEM rubber lateral chain of ester group medium containing polarized is stated, it is good with the compatibility of EVA/POE/OBC etc., and be conducive to be bonded.
The embodiment of the invention provides the preparation methods of the anti-aging EVA foamed material of high temperature resistant as described above, including
Following steps:
The compound material of the EVA is successively kneaded and is granulated, it is then foamed, obtain the anti-aging EVA hair of high temperature resistant
Foam material.
The process flow of the embodiment of the present invention specifically includes that weighing → mixing → granulation → foaming → baking.The present invention is real
It applies example and is first grouped weighing: according to the dosage of formula, DCP and foaming agent can be first group and weighed up；By stearic acid, zinc stearate,
Zinc oxide is second group and weighs up；Remaining material is that third group weighs up.
Weighed each ingredient is kneaded by the embodiment of the present invention: first being poured into third group material in mixer, and starter motor
Device is raised between 80-85 DEG C to temperature, then pours into second group of material；Third group material is poured into when temperature is raised to 90-95 DEG C；To temperature
When degree rises to 100-110 DEG C, mixed material is poured out.
Material after mixing is granulated or is made material by the embodiment of the present invention: mixed material poured into grain-making machine, first,
Two, three, four area's temperature difference is adjustable are as follows: 75 DEG C, 80 DEG C, 85 DEG C, 90 DEG C.Also, screw speed is adjusted to 40-50 revs/min,
Blank revolving speed is adjusted to 15-20 rev/min.Make during material if using water ring/underwater cutpellet, need to by dewaterer (from
Scheming) dehydration and it is air-cooled continue cooling and be dehydrated, collected after being screened using vibrating screen；If using can be direct if air-cooled
It uses.
After granulation, the embodiment of the present invention foams obtained mixture: the material made is poured into injection foaming molding
In machine, feeding, first, second, third and fourth area's temperature difference is adjustable are as follows: 80 DEG C, 85 DEG C, 90 DEG C, 95 DEG C, above and below molding die temperature
Template difference is adjustable are as follows: 170 DEG C, 170 DEG C.Doses is set according to mold dosage, vulcanization time is generally 500-700 seconds.
Finally, the embodiment of the present invention is toasted: temperature being dried first, second, third and fourth area's temperature and is adjusted to respectively: 80 DEG C, 90
DEG C, 95 DEG C, 100 DEG C, revolving speed be 60-70 rpms；The foamed material of foaming is sent into baking oven mouth, the selection of baking oven length
It is 30-40 meters long to be advisable；From first to last baking time is to be advisable for 30-40 minutes, and the high temperature resistant obtained for moving midsole is anti-ageing
Change EVA foamed material.
The present invention also provides the anti-aging EVA foamed materials of high temperature resistant as described above to prepare answering in Sports shoe sole
With；That is, a kind of Sports shoe sole, is the indsole of the EVA foamed material including material.Present invention is mainly used for production sport footwear,
But it is also not necessarily limited to other type shoes product.The embodiment of the present invention is not particularly limited the external structure design of Sports shoe sole, can also
Using the upper structure of this field routine.EVA foamed material as described above and preparation method thereof, the present invention can be selected
Different formula combinations meets the functional requirement of different product.
For a further understanding of the application, foam below with reference to embodiment EVA anti-aging to high temperature resistant provided by the present application
Material and its preparation method and application is specifically described.
Embodiment 1
Weighing: DCP and foaming agent are first group and weighed up by the dosage being formulated according to table 1；By stearic acid, zinc stearate, oxygen
Change zinc to weigh up for second group；Remaining material is that third group weighs up.
It is kneaded: third group material being poured into mixer first, and starts machine, is raised between 80-85 DEG C to temperature, then fall
Enter second group of material；Third group material is poured into when temperature is raised to 90-95 DEG C；When temperature rises to 100-110 DEG C, mixed material is fallen
Out.
It makes material: mixed material is poured into grain-making machine, first, second, third and fourth area's temperature is adjusted to respectively: 75,80,85,90
℃.Also, screw speed is adjusted to 40-50 revs/min, blank revolving speed is adjusted to 15-20 rev/min.Material is made to adopt in the process
With water ring/underwater cutpellet, by dewaterer (centrifuge) dehydration and it is air-cooled continue cooling and be dehydrated, using Vibration Screen
It is collected after choosing.
Foaming: the material made is poured into injection foaming molding machine, feeding, first, second, third and fourth area's temperature is adjusted to respectively:
80,85,90,95 DEG C, molding die temperature bolster is adjusted to respectively: 170,170 DEG C.Doses is set according to mold dosage
Good, vulcanization time is 600 seconds.
Baking: temperature is dried first, second, third and fourth area's temperature and is adjusted to respectively: 80,90,95,100 DEG C, revolving speed is that 60-70 turns every
Minute；The foamed material of foaming is sent into baking oven mouth, the selection of baking oven length is 30 meters long；From first to last baking time is 30 points
Clock obtains the anti-aging EVA foamed material of high temperature resistant.
Embodiment 2-6
As shown in table 1, the anti-aging EVA foamed material of high temperature resistant is prepared in the step of according to embodiment 1, formula respectively.
Comparative example 1-2
As shown in table 1, common EVA foamed material is prepared in the step of according to embodiment 1, formula respectively.
Specific formula (being mass fraction) in 1 embodiment of the present invention of table and comparative example
Wherein, each raw material sources of embodiment and comparative example are as follows:
Vamac Ultra IP: Mooney viscosity 29[ML 100 DEG C of (1+4) at], E.I.Du Pont Company.
Vamac DP: Mooney viscosity 22[ML 100 DEG C of (1+4) at], E.I.Du Pont Company.
Elvax 265:VA mass content be 26%, hardness 78A, 73 DEG C of fusing point, E.I.Du Pont Company.
Elvax 460:VA mass content be 18%, hardness 90A, 88 DEG C of fusing point, E.I.Du Pont Company.
EVA 7350M:VA mass content be 18%, hardness 90A, 84 DEG C of fusing point, Tai Su company.
EVA 7360M:VA mass content be 18%, hardness 86A, 80 DEG C of fusing point, Tai Su company.
EVA 7470M:VA mass content be 18%, hardness 82A, 76 DEG C of fusing point, Tai Su company.
Infuse 9107: hardness 60A, 121 DEG C of fusing point, Dow Chemical.
Infuse 9000: hardness 71A, 120 DEG C of fusing point, Dow Chemical.
Engage 8180: hardness 54A, 47 DEG C of fusing point, Dow Chemical.
Engage 8150: hardness 70A, 55 DEG C of fusing point, Dow Chemical.
Engage 8003: hardness 84A, 77 DEG C of fusing point, Dow Chemical.
DCP: Sinopec company.
Stearic acid 1801: Du Kuda company, Indonesia.
Zinc stearate ZTE: Huzhou Linghu Xinwang Chemical Co., Ltd..
ZnO 997: white Stone steles zinc oxide, relative density are 4.42~4.45.
Blowing agent AC 6000H: Hangzhou Hi-Tech Fine Chemical Co., Ltd.
White carbon black WL180: Evonik Degussa Corp..
EVA foamed material described in embodiment and comparative example is tested for the property, it is as a result as follows.
Performance data contrast table before and after 2 embodiment of table and the heat ageing of comparative example
Remarks: the high temperature ageing-resistant test condition that the present invention is carried out is as follows: foamed material being placed in baking oven, oven temperature
100 DEG C and 150 DEG C are set as, test physical data after toasting 6h.Sample thickness: 10mm.
This field generally requires to want material broken；Laboratory test foaming indsole and rubber sole between adhesive strength when
Wait, all can standard adhesion intensity and whether material break.It is broken if it is in middle bottom material pull-up, illustrates the fitting intensity of adhesive very
It is high, it is not easy to which that degumming, it is broken that this phenomenon is just called material.It is pulled open if it is between two bottoms, illustrates that the adhesive strength of adhesive is poor,
It is easy degumming, referred to as " non-material is broken ".
As shown in table 2, the percent thermal shrinkage for being added to the high temperature resistant foamed material of AEM rubber is minimum, is 0.6%~1%.And
The conventional EVA foamed material (comparative example 1) for being not added with high-melting-point OBC block copolymer is heat-shrinked maximum, is 2.5%；It is added to
The percent thermal shrinkage of the EVA foamed material (comparative example 2) of high-melting-point OBC block copolymer is placed in the middle, is 1.8%.By contrast, illustrate this
The high temperature heat-resistant shrinkage of the invention high temperature resistant ethylene-acrylate foamed material is best.Also, the present invention foams just
Often, there are not the abnormal phenomenon such as layering, bubbling.
Performance change rate after heat ageing is referring specifically to table 3 and Fig. 1-7:
Performance change rate contrast table after 3 embodiment of table and the heat ageing of comparative example
As shown in table 3, discovery is not added with the conventional EVA foamed material (comparative example 1) of high-melting-point OBC block copolymer,
The hot air aging change rate of density, hardness, tensile strength, tearing strength, elongation at break, rebound, compression set etc.
Maximum, and the change rate for being added to the high temperature resistant foamed material of AEM rubber is minimum: it is added to high-melting-point OBC block copolymer
The hot air aging change rate of EVA foamed material (comparative example 2) is placed in the middle.Through 150 DEG C, after 6h heat ageing, the permanent pressure of comparative example 1
Compression deformation change rate, mechanical property change rate and firmness change rate are above 32%, and comparative example 2 is higher than 27%, the present invention
The change rate of the high temperature resistant ethylene-acrylate foamed material is below 20%, preferably maintains original property of material
Energy.EVA foamed material provided by the invention has excellent high temperature resistant ageing resistance, and processing temperature is low, is conducive to subsequent
Fitting.
The above is only a preferred embodiment of the present invention, it is noted that for making the professional technique of the art
Personnel are that by various modifications to these embodiments without departing from the technical principles of the invention, and these
Modification also should be regarded as the range that the present invention should protect.
Claims (9)
1. a kind of anti-aging EVA foamed material of high temperature resistant, which is characterized in that be made by the compound material of EVA is foamed, the EVA
Compound material includes the component of following parts by weight:
40~50 parts of ethylene vinyl acetate copolymer；
10~55 parts of AEM rubber；
10~20 parts of polyolefin elastomer；
10~20 parts of ethylene octene block copolymer；
0.5~0.8 part of peroxide cross-linking agent；
3~5 parts of foaming agent；
1~4 part of activating agent；
3~12 parts of reinforcing agent.
2. the anti-aging EVA foamed material of high temperature resistant according to claim 1, which is characterized in that the compound material packet of EVA
Include 30~50 parts of AEM rubber；Methyl acrylate mass content is 8%~40% in the AEM rubber.
3. the anti-aging EVA foamed material of high temperature resistant according to claim 1, which is characterized in that the ethylene-vinyl acetate
VA mass content is 18%~28% in ester copolymer.
4. the anti-aging EVA foamed material of high temperature resistant according to claim 1, which is characterized in that the peroxide crosslinking
Agent is one of cumyl peroxide and 1,4- dual-tert-butyl cumene hydroperoxide or a variety of.
5. the anti-aging EVA foamed material of high temperature resistant according to claim 1, which is characterized in that the foaming agent is azo
One of diformamide, two benzene sulfonyl hydrazide of 4,4- oxo and white hair infusion are a variety of.
6. the anti-aging EVA foamed material of high temperature resistant according to claim 1, which is characterized in that the activating agent includes hard
Resin acid, zinc stearate and zinc oxide.
7. the anti-aging EVA foamed material of high temperature resistant described according to claim 1~any one of 6, which is characterized in that described
The compound material of EVA includes 5~10 parts of reinforcing agent；The reinforcing agent is white carbon black.
8. such as the preparation method of the anti-aging EVA foamed material of high temperature resistant according to any one of claims 1 to 7, including it is following
Step:
The compound material of the EVA is successively kneaded and is granulated, it is then foamed, obtain the anti-aging EVA foaming material of high temperature resistant
Material.
9. as the anti-aging EVA foamed material of high temperature resistant according to any one of claims 1 to 7 is preparing answering in Sports shoe sole
With.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201910174323.5A CN109912877B (en) | 2019-03-08 | 2019-03-08 | High-temperature-resistant anti-aging EVA (ethylene-vinyl acetate copolymer) foam material as well as preparation method and application thereof |
Applications Claiming Priority (1)
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