CN104650445A - EVA foam material with high transparency and preparation method thereof - Google Patents
EVA foam material with high transparency and preparation method thereof Download PDFInfo
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- CN104650445A CN104650445A CN201310593823.5A CN201310593823A CN104650445A CN 104650445 A CN104650445 A CN 104650445A CN 201310593823 A CN201310593823 A CN 201310593823A CN 104650445 A CN104650445 A CN 104650445A
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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
- C08L23/00—Compositions of homopolymers or copolymers of unsaturated aliphatic hydrocarbons having only one carbon-to-carbon double bond; Compositions of derivatives of such polymers
- C08L23/02—Compositions of homopolymers or copolymers of unsaturated aliphatic hydrocarbons having only one carbon-to-carbon double bond; Compositions of derivatives of such polymers not modified by chemical after-treatment
- C08L23/04—Homopolymers or copolymers of ethene
- C08L23/08—Copolymers of ethene
- C08L23/0846—Copolymers of ethene with unsaturated hydrocarbons containing atoms other than carbon or hydrogen
- C08L23/0853—Ethene vinyl acetate copolymers
-
- A—HUMAN NECESSITIES
- A43—FOOTWEAR
- A43B—CHARACTERISTIC FEATURES OF FOOTWEAR; PARTS OF FOOTWEAR
- A43B13/00—Soles; Sole-and-heel integral units
- A43B13/02—Soles; Sole-and-heel integral units characterised by the material
- A43B13/04—Plastics, rubber or vulcanised fibre
-
- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08J—WORKING-UP; GENERAL PROCESSES OF COMPOUNDING; AFTER-TREATMENT NOT COVERED BY SUBCLASSES C08B, C08C, C08F, C08G or C08H
- C08J9/00—Working-up of macromolecular substances to porous or cellular articles or materials; After-treatment thereof
- C08J9/04—Working-up of macromolecular substances to porous or cellular articles or materials; After-treatment thereof using blowing gases generated by a previously added blowing agent
- C08J9/06—Working-up of macromolecular substances to porous or cellular articles or materials; After-treatment thereof using blowing gases generated by a previously added blowing agent by a chemical blowing agent
- C08J9/10—Working-up of macromolecular substances to porous or cellular articles or materials; After-treatment thereof using blowing gases generated by a previously added blowing agent by a chemical blowing agent developing nitrogen, the blowing agent being a compound containing a nitrogen-to-nitrogen bond
- C08J9/102—Azo-compounds
- C08J9/103—Azodicarbonamide
-
- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08J—WORKING-UP; GENERAL PROCESSES OF COMPOUNDING; AFTER-TREATMENT NOT COVERED BY SUBCLASSES C08B, C08C, C08F, C08G or C08H
- C08J2323/00—Characterised by the use of homopolymers or copolymers of unsaturated aliphatic hydrocarbons having only one carbon-to-carbon double bond; Derivatives of such polymers
- C08J2323/02—Characterised by the use of homopolymers or copolymers of unsaturated aliphatic hydrocarbons having only one carbon-to-carbon double bond; Derivatives of such polymers not modified by chemical after treatment
- C08J2323/04—Homopolymers or copolymers of ethene
- C08J2323/08—Copolymers of ethene
-
- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08L—COMPOSITIONS OF MACROMOLECULAR COMPOUNDS
- C08L2201/00—Properties
- C08L2201/10—Transparent films; Clear coatings; Transparent materials
-
- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08L—COMPOSITIONS OF MACROMOLECULAR COMPOUNDS
- C08L2203/00—Applications
- C08L2203/14—Applications used for foams
-
- 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
- C08L2205/02—Polymer mixtures characterised by other features containing two or more polymers of the same C08L -group
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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)
- Engineering & Computer Science (AREA)
- Materials Engineering (AREA)
- General Chemical & Material Sciences (AREA)
- Footwear And Its Accessory, Manufacturing Method And Apparatuses (AREA)
- Manufacture Of Porous Articles, And Recovery And Treatment Of Waste Products (AREA)
Abstract
The invention relates to an EVA foam material and its preparation method, specifically to an EVA foam material with high transparency and a preparation method thereof. The EVA foam material is composed of the following ingredients, by weight, 80-120 parts of colloidal particle raw material, 12-23 parts of an activator, 1.7-1 parts of a bridging agent, 0.6-1 part of a lubricant, 2-3 parts of a foaming agent and a proper amount of color masterbatch, wherein the activator comprises 2-3 parts of a transparent zinc oxide powder. By mixing in an internal mixer and pelleting, the EVA foam material with high transparency is obtained. The EVA foam material has characteristics of good transparency, high elasticity and strong toughness. Surface smoothness and transparency of a product can be raised. In addition, the technology is simple, and production efficiency is high.
Description
Technical field
The present invention relates to EVA foam material and preparation method thereof, EVA foam material being specifically related to a kind of high-clarity and preparation method thereof.
Background technology
EVA is formed by ethene-vinyl acetate copolymerization, and be called for short EVA, compared with polyethylene, EVA owing to introducing Vinyl Acetate Monomer in molecular chain, thus reduces high-crystallinity, improves snappiness, shock resistance, filler intermiscibility and heat seal performance.Usually in alleged EVA, the end, just refers to and EVA to be injected after mould by the bottom of footwear one-time formed after heat, also cries in one step foaming the end.EVA particle is directly injected inside board mould with the EVA ejaculator of hot pressing by traditional E VA, and vacuum vulcanizing general 400 seconds rear molds are opened, mould insole foaming, then through overheated, cold formed case sizing.The feature of this method is exactly that output is high, once shaped., shortcoming is easy distortion, jaundice of long duration, shrinks.
Existing EVA shoe material is owing to passing through foaming, and inevitably produce color, thus, those skilled in the art wish the advantage of the advantages transparent sole of EVA shoe material, but cannot prepare transparent EVA foam shoe material according to prior art.
Summary of the invention
The object of the invention is for deficiency of the prior art, provide a kind of EVA foam material of high-clarity, transparency is good, elasticity is high, resistance to toughness is strong feature that it has, can improve surface smoothness and the transparency of product.
Another goal of the invention of the present invention is, provides a kind of preparation method of EVA foam material of high-clarity, and it has low cost of manufacture, operation is simple, production efficiency is high feature.
Object of the present invention is achieved through the following technical solutions:
An EVA foam material for high-clarity, is made up of the component of following weight part:
Micelle raw material 80-120 part
Promoting agent 12-23 part
Bridging agent 0.5-1 part
Lubricant 0.6-1 part
Whipping agent 2-3 part
Masterbatch is appropriate,
Wherein, described promoting agent comprises the transparent Indium zinc powder of 2 ~ 3 parts.
The content of the vinyl acetate between to for plastic in EVA lower than 20% time, can be used as plastics and use.EVA has good resistance to low temperature, its heat decomposition temperature is lower, is about about 230 DEG C, along with the increase of molecular weight, the softening temperature of EVA rises, processibility and plastic surface luster property decline, but intensity increases, and impelling strength and environmental stress crack resistance improve, the chemical-resistant resistance of EVA, oil-proofness aspect are than PE, PVC is slightly poor, and with the increase of vinyl acetate content, changes more obvious.
EVA resin has good flexibility, and the elasticity as rubber, still can have good pliability at-50 DEG C, the transparency and surface luster property good, well, anti-aging and resistance to ozone intensity is good, nontoxicity for chemical stability.Good with the miscibility of filler, painted good with molding processibility.EVA resin is had many uses.
Wherein, described micelle raw material comprises the ethylene-vinyl acetate copolymer of 70 ~ 90 weight parts and the polyolefin elastomer of 10 ~ 30 weight parts.
Polyolefin elastomer has the excellent properties such as ageing-resistant, resistance to ozone, resistant to chemical media, by being cross-linked polyolefin elastomer, the heat resisting temperature of material is enhanced, and tension set diminishes, and the Main Mechanical such as tensile strength, tear strength all has significant improvement.Combines by polyolefin elastomer and EVA are crosslinked, can the mechanical property of strongthener, make the qualitative property of sole better, but still keep its soft and toughness, make the more applicable footwear material of material.
Wherein, described bridging agent is at least one in sulphur, dicumyl peroxide and ditertiary butyl peroxide, is preferably dicumyl peroxide.Dicumyl peroxide can make ethylene-vinyl acetate copolymer (EVA) foam materials form the abscess of fine and even, improves thermotolerance and the weathering resistance of goods simultaneously.
Wherein, described lubricant is at least one in stearic acid, magnesiumcarbonate and calcium oxide, and be preferably stearic acid, stearic acid plays the effect of softening agent, stablizer and lubricant.
Wherein, described whipping agent is at least one in Cellmic C 121, p-toluene sulfonyl hydrazide and azo dimethiamine, is preferably Cellmic C 121.The present invention foams by utilizing Cellmic C 121, and the relative density of footwear material diminishes, then feel more light and handy, and good springiness, contracting is good, flexibility is good.Polyolefin elastomer has blowing agents auxiliary agent, can produce chemical reaction with it, reduces the decomposition calibration of whipping agent, improves rate of decomposition.
Wherein, described Masterbatch is fluorescence color master batch or luminous color master batch.Look mother is the color in order to regulate material, makes it more meet popular hobby demand, improves market adaptability.Adopt fluorescence color master batch, the color of material can be made more bright-coloured, and the class of product is higher.Adopt luminous color master batch, material can be made also to show color at night, for following the fashion and needing youngster or the stage performance of this demand, seem and be even more important.
An EVA foam material for high-clarity, is made up of the component of following weight part:
Ethylene-vinyl acetate copolymer 70-90 part
Polyolefin elastomer 10-30 part
Transparent silicon dioxide powder 10-20 part
Dicumyl peroxide 0.5-1 part
Stearic acid 0.6-1 part
Transparent Indium zinc powder 2-3 part
Cellmic C 121 2-3 part
Masterbatch is appropriate.
Further, a kind of EVA foam material of high-clarity, is made up of the component of following weight part:
Ethylene-vinyl acetate copolymer 70-80 part
Polyolefin elastomer 10-20 part
Transparent silicon dioxide powder 13-15 part
Dicumyl peroxide 0.5 part
Stearic acid 1 part
Transparent Indium zinc powder 2-2.5 part
Cellmic C 121 2-2.5 part
Masterbatch 1 part.
Further, a kind of EVA foam material of high-clarity, is made up of the component of following weight part:
Ethylene-vinyl acetate copolymer 80 parts
Polyolefin elastomer 20 parts
15 parts, transparent silicon dioxide powder
Dicumyl peroxide 0.5 part
Stearic acid 1 part
Transparent Indium zinc powder 2 parts
Cellmic C 121 2.5 parts
Masterbatch 1 part.
A preparation method for the EVA foam material of high-clarity, is characterized in that: comprise following preparation process:
A, by micelle raw material, promoting agent, lubricant, whipping agent, look mother be fed into mixer mixing according to weight part, mixing time is 7min-9min, and temperature is 100 DEG C-110 DEG C;
Adding bridging agent in B, the material that mixed in steps A continues mixing, and the time is 2min-4min, and temperature controls at 110 DEG C-115 DEG C;
C, pour the mixture that banburying in step B is good in tablets press granulation, prepare transparent EVA foam material.
Beneficial effect of the present invention: the present invention by adding zinc carbonate and transparent silicon dioxide powder in formula, zinc carbonate is the weighting agent of light colour, and there is very strong activator characteristic, transparent silicon dioxide powder is a kind of nonmetallic mineral powder, transparency is high, whiteness is good, greatly improve product surface slipperiness and transparency, and also reach the density reducing people's foam material, producing the sole product obtained is placed on the LED photodiode of different colours, can project and dazzle beautiful colorful light, the sole being particularly suitable for pump or fashionable group uses.
Another beneficial effect of the present invention: preparation method of the present invention does not need the improvement of operation through too much and equipment, and can continue to use the preparation section of traditional EVA foam shoe material, by the control to various parameter, production cost is low, and production efficiency is high.
Embodiment
The invention will be further described with the following Examples.
embodiment 1
A, 70 parts of ethylene-vinyl acetate copolymers, 30 parts of polyolefin elastomers, 15 parts of transparent silicon dioxide powder, 1 part of stearic acid, 2 parts of transparent Indium zinc powders, 2.5 parts of Cellmic C 121s and 1 part of look mother is fed into mixer mixing according to weight part, mixing time is 7min, and temperature is 100 DEG C;
Adding 0.5 part of dicumyl peroxide in B, the material that mixed in steps A continues mixing, and the time is 2min, and temperature controls at 110 DEG C;
C, pour the mixture that banburying in step B is good in tablets press granulation, prepare transparent EVA foam material.
embodiment 2
A, 90 parts of ethylene-vinyl acetate copolymers, 10 parts of polyolefin elastomers, 13 parts of transparent silicon dioxide powder, 1 part of stearic acid, 2 parts of transparent Indium zinc powders, 2.5 parts of Cellmic C 121s and 1 part of look mother is fed into mixer mixing according to weight part, mixing time is 8min, and temperature is 100 DEG C;
Adding 0.5 part of dicumyl peroxide in B, the material that mixed in steps A continues mixing, and the time is 3min, and temperature controls at 115 DEG C;
C, pour the mixture that banburying in step B is good in tablets press granulation, prepare transparent EVA foam material.
embodiment 3
A, 80 parts of ethylene-vinyl acetate copolymers, 20 parts of polyolefin elastomers, 15 parts of transparent silicon dioxide powder, 1 part of stearic acid, 2 parts of transparent Indium zinc powders, 2.5 parts of Cellmic C 121s and 1 part of look mother is fed into mixer mixing according to weight part, mixing time is 8min, and temperature is 100 DEG C;
Adding 0.5 part of dicumyl peroxide in B, the material that mixed in steps A continues mixing, and the time is 2min, and temperature controls at 110 DEG C;
C, pour the mixture that banburying in step B is good in tablets press granulation, prepare transparent EVA foam material.
embodiment 4
A, 85 parts of ethylene-vinyl acetate copolymers, 15 parts of polyolefin elastomers, 14 parts of transparent silicon dioxide powder, 1 part of stearic acid, 2.5 parts of transparent Indium zinc powders, 2.5 parts of Cellmic C 121s and 1 part of look mother is fed into mixer mixing according to weight part, mixing time is 8min, and temperature is 100 DEG C;
Adding 0.5 part of dicumyl peroxide in B, the material that mixed in steps A continues mixing, and the time is 4min, and temperature controls at 115 DEG C;
C, pour the mixture that banburying in step B is good in tablets press granulation, prepare transparent EVA foam material.
embodiment 5
A, 80 parts of ethylene-vinyl acetate copolymers, 20 parts of polyolefin elastomers, 15 parts of transparent silicon dioxide powder, 1 part of part stearic acid, 2 parts of transparent Indium zinc powders, 2 parts of Cellmic C 121s and 1 part of look mother is fed into mixer mixing according to weight part, mixing time is 8min, and temperature is 100 DEG C;
Adding 0.5 part of dicumyl peroxide in B, the material that mixed in steps A continues mixing, and the time is 3min, and temperature controls at 110 DEG C;
C, pour the mixture that banburying in step B is good in tablets press granulation, prepare transparent EVA foam material.
Table 1: the component of each embodiment and consumption list:
| Component | Embodiment 1 | Embodiment 2 | Embodiment 3 | Embodiment 4 | Embodiment 5 |
| Ethylene-vinyl acetate copolymer | 70 | 90 | 80 | 85 | 80 |
| Polyolefin elastomer | 30 | 10 | 20 | 15 | 20 |
| Transparent silicon dioxide powder | 15 | 13 | 15 | 14 | 15 |
| Dicumyl peroxide | 0.5 | 0.5 | 0.5 | 0.5 | 0.5 |
| Stearic acid | 1 | 1 | 1 | 1 | 1 |
| Transparent Indium zinc powder | 2 | 2 | 2 | 2.5 | 2 |
| Cellmic C 121 | 2.5 | 2.5 | 2.5 | 2.5 | 2 |
| Masterbatch | 1 | 1 | 1 | 1 | 1 |
Table 2: the physicals experimental result list of each embodiment
| Test item | Embodiment 1 | Embodiment 2 | Embodiment 3 | Embodiment 4 | Embodiment 5 |
| Hardness (shore A) | 55 | 60 | 56 | 56 | 56 |
| Density (g/cm3) | 0.26 | 0.26 | 0.26 | 0.26 | 0.26 |
| Tensile strength (MPA) | 2.0 | 2.3 | 2.1 | 2.2 | 2.2 |
| Compression distorsion shape (%) | 30 | 35 | 32 | 33 | 34 |
| Rebound degree (%) | 48 | 40 | 45 | 43 | 44 |
| Color inhibition (level) | 4 | 4 | 4 | 4 | 4 |
| Contraction ratio (%) | 0.9 | 0.8 | 0.8 | 0.8 | 0.8 |
| Transmittance (%) | 61 | 63 | 64 | 63 | 63 |
Remarks: above test all according to industry testing standard and adopt industry to commonly use means of testing to draw experimental result.
In sum: preparation method of the present invention does not need original operation and equipment to improve, continue to use the preparation section of traditional EVA foam shoe material, at the bottom of the EVA shoe that can prepare, there is good rebound performance and light performance, toughness is high, transparency is good, and has good shockproof, heat insulation, heat-insulating and cold and low-temperature performance, especially be applicable to stage footwear and special occasion footwear, make sole have new transparent characteristic, strengthen the use field of sole.
Finally should be noted that; above embodiment is only in order to illustrate technical scheme of the present invention; but not limiting the scope of the invention; although done to explain to the present invention with reference to preferred embodiment; those of ordinary skill in the art is to be understood that; can modify to technical scheme of the present invention or equivalent replacement, and not depart from essence and the scope of technical solution of the present invention.
Claims (10)
1. an EVA foam material for high-clarity, is characterized in that: be made up of the component of following weight part:
Micelle raw material 80-120 part
Promoting agent 12-23 part
Bridging agent 0.5-1 part
Lubricant 0.6-1 part
Whipping agent 2-3 part
Masterbatch is appropriate,
Wherein, described promoting agent comprises the transparent Indium zinc powder of 2 ~ 3 parts.
2. the EVA foam material of a kind of high-clarity according to claim 1, is characterized in that: described micelle raw material comprises the ethylene-vinyl acetate copolymer of 70 ~ 90 weight parts and the polyolefin elastomer of 10 ~ 30 weight parts.
3. the EVA foam material of a kind of high-clarity according to claim 1, is characterized in that: described bridging agent is at least one in sulphur, dicumyl peroxide and ditertiary butyl peroxide.
4. the EVA foam material of a kind of high-clarity according to claim 1, is characterized in that: described lubricant is at least one in stearic acid, magnesiumcarbonate and calcium oxide.
5. the EVA foam material of a kind of high-clarity according to claim 1, is characterized in that: described whipping agent is at least one in Cellmic C 121, p-toluene sulfonyl hydrazide and azo dimethiamine.
6. the EVA foam material of a kind of high-clarity according to claim 1, is characterized in that: described look mother is fluorescence color master batch or luminous color master batch.
7. the EVA foam material of a kind of high-clarity according to claim 1, is characterized in that: be made up of the component of following weight part:
Ethylene-vinyl acetate copolymer 70-90 part
Polyolefin elastomer 10-30 part
Transparent silicon dioxide powder 10-20 part
Dicumyl peroxide 0.5-1 part
Stearic acid 0.6-1 part
Transparent Indium zinc powder 2-3 part
Cellmic C 121 2-3 part
Masterbatch is appropriate.
8. the EVA foam material of a kind of high-clarity according to claim 1, is characterized in that:
Ethylene-vinyl acetate copolymer 70-80 part
Polyolefin elastomer 10-20 part
Transparent silicon dioxide powder 13-15 part
Dicumyl peroxide 0.5 part
Stearic acid 1 part
Transparent Indium zinc powder 2-2.5 part
Cellmic C 121 2-2.5 part
Masterbatch 1 part.
9. the EVA foam material of a kind of high-clarity according to claim 1, is characterized in that:
Ethylene-vinyl acetate copolymer 80 parts
Polyolefin elastomer 20 parts
15 parts, transparent silicon dioxide powder
Dicumyl peroxide 0.5 part
Stearic acid 1 part
Transparent Indium zinc powder 2 parts
Cellmic C 121 2.5 parts
Masterbatch 1 part.
10. prepare a preparation method for the EVA foam material described in any one of claim 1-9, it is characterized in that: comprise following preparation process:
Micelle raw material, promoting agent, lubricant, whipping agent, fluorescence color master batch are fed into mixer mixing according to weight part, and mixing time is 7min-9min, and temperature is 100 DEG C-110 DEG C;
Adding bridging agent in the material mixed in steps A continues mixing, and the time is 2min-4min, and temperature controls at 110 DEG C-115 DEG C;
Pour the mixture that banburying in step B is good in tablets press granulation, prepare transparent EVA foam material.
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Cited By (14)
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| CN104910505A (en) * | 2015-06-19 | 2015-09-16 | 德州市鑫华润聚氨酯鞋材股份有限公司 | High-temperature-resistant low-shrinkage EVA (ethylene-vinyl acetate) and preparation method thereof |
| CN105037913A (en) * | 2015-08-14 | 2015-11-11 | 刘民钦 | High-strength EVA pipe fitting |
| CN105694141A (en) * | 2016-04-01 | 2016-06-22 | 林洁 | Rubber plug for puncture-type infusion connecting member heparin cap |
| CN106479033A (en) * | 2016-11-22 | 2017-03-08 | 福建省龙麒新材料发展有限公司 | A kind of trnaslucent materials and preparation method thereof and the sole prepared by the material |
| CN106916366A (en) * | 2017-03-10 | 2017-07-04 | 东莞兴腾鞋材有限公司 | A kind of RPUC high-performance moldeds material for sole of shoe |
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| CN109749222A (en) * | 2019-01-30 | 2019-05-14 | 晋江市石达塑胶精细有限公司 | Utilize high concentration EVA Masterbatch and preparation method thereof made from EVA waste material |
| CN110092979A (en) * | 2019-05-31 | 2019-08-06 | 杨道丰 | A kind of the camouflage color egative film and preparation method at EVA shoe bottom |
| CN110172203A (en) * | 2019-05-31 | 2019-08-27 | 杨道丰 | A kind of footwear material and preparation method at luminous EVA shoe bottom |
| CN110204821A (en) * | 2019-05-25 | 2019-09-06 | 吴嘉原 | A kind of wear-resisting on-slip light transmission footwear material and manufacturing method |
| CN113563628A (en) * | 2021-07-22 | 2021-10-29 | 惠州市凯盛实业有限公司 | Colored antistatic EVA (ethylene-vinyl acetate copolymer) foaming plate and preparation method thereof |
| US11384215B2 (en) | 2019-09-24 | 2022-07-12 | Sekisui Voltek, Llc | Light-transmissive foam composition and process |
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Cited By (16)
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