CN1772466A - Making process and product of shoe sole and middle insole - Google Patents
Making process and product of shoe sole and middle insole Download PDFInfo
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- CN1772466A CN1772466A CN 200410090762 CN200410090762A CN1772466A CN 1772466 A CN1772466 A CN 1772466A CN 200410090762 CN200410090762 CN 200410090762 CN 200410090762 A CN200410090762 A CN 200410090762A CN 1772466 A CN1772466 A CN 1772466A
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- footwear
- shoe
- pad
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Abstract
The present invention discloses making process and product of shoe sole and middle insole. In the production, polyolefin is used as the main material and the material is first radiated with electron beam or gamma ray to bridge and then hot molded. During hot molding, supercritical fluid is injected with one supercritical gas pressurizing system into the molten plastic and the pressure is then released for the supercritical fluid to become gas for expanding and foaming the plastic to preset size.
Description
Technical field
The present invention relates to the manufacture method and the finished product of a kind of shoe-pad and footwear medium bottom shoes material, be meant that especially a kind of is main stock with polyolefin plastics, in the process of molded shoe pad and footwear medium bottom shoes material, impose electron beam irradiation bridge formation or gamma rays irradiation bridge formation earlier, in inserting the heating and mould pressing process, inject supercritical fluid and reach the manufacture method and the finished product of expanded foamed effect again.
Background technology
The footwear material at the end is because of meeting light weight, characteristics such as high buffering in shoe-pad and the footwear.So all can be through the forming process of foaming technique.By and large, the manufacture method of footwear material such as end as shown in Figure 1 in known shoe-pad and the footwear, foaming composite material (for example: the form) stirring of being mixed with predetermined ratio by raw materials such as EVA plastics, blowing agent, bridging agent and other additives, make or extrusion molding becomes quantitative scaled down germule through spreading, put into the heating mould heating and mould pressing again and be foamed into the footwear material of preliminary dimension, and then through cooling and shaping, make it to become the elementary finished product of shoe-pad or footwear medium bottom shoes material, cooperate combination to do follow-up processing again with other position and handle.And common ground promptly all is to utilize to add the foaming and intumescing material that blowing agent is used as footwear material germule in known manufacture process, produce chemical change and the effect of rapid expansion with blowing agent through heating, make germule be foamed into end finished product in the shoe-pad of preliminary dimension or the footwear.
Only with environmental protection requirement now, even the chemical addition agent of blowing agent and so on uses to preferentially considering to reduce to exempt as far as possible, if, then ought be manufacturing direction brand-new on the product if the interpolation that can have other manufacture method can replace blowing agent is used, more can be for meeting the environmental protection needs.Be with regard to the idea and requirement of environmental protection, to be not to refer to that how big making an addition in the footwear material manufacture process of blowing agent now itself can cause injury to environment in what this must emphasize.But when the footwear material uses when abandoning because of damage after long-time through the consumer, blowing agent promptly becomes the burden thing on the environmental protection treatment; Change angle, the footwear material discards of blowing agent of not having can more originally have the blowing agent of interpolation person more to save trouble handling to be taken in, and more do not have the environmental protection misgivings, and this is with regard to environmental protection when abandoning is considered.Moreover, for increasing substrate in shoe-pad and the footwear, also need add bridging agent before the footwear material foaming, make its melt strength that improves plastics, to increase the temperature range of the suitable foaming of plastic melt.The general present known bridging agent that uses is peroxide, be to utilize the effect of heat to decompose and generate overactive free radical, these free radicals make and generate active site on the polymer carbon and then form interlinkage, also therefore the plastics of fusion just have enough melt strength and viscosity, form bubble to maintain gas.
Under harsh day by day environmental requirement, the decrement of chemical addition agent even release are necessary considering, and except that the sharp aroma that is produced on processing procedure can be avoided, the carrying capacity of environment that is produced when abandoning or burning also can reduce.Because just can consider environmental requirement when abandoning when making in advance also is the contribution to the conscientious power of environmental protection, so make great efforts innovation allow the footwear material at the end in shoe-pad or the footwear in manufacture process must not add blowing agent and bridging agent, and still can produce the footwear material that expection requires, be development efforts direction of the present invention.
Summary of the invention
The technical problem to be solved in the present invention provides the manufacture method and the finished product of a kind of shoe-pad and footwear medium bottom shoes material, mainly in heating and mould pressing footwear material molten plastic forming process, impose electron beam irradiation bridge formation or gamma rays irradiation bridge formation earlier, inject the supercritical fluid that produced through the supercritical gas pressure charging system then in molten plastic, when then mat supercritical fluid decompression transfer becomes gas, can in plastics, evenly expand, reach the effect that plastic expansion (foaming) is become preliminary dimension, so promptly obtain identical foaming finished product after the cooling with known interpolation blowing agent person.
For this reason, technical scheme of the present invention is: the manufacture method and the finished product of a kind of shoe-pad and footwear medium bottom shoes material, with polyolefin is main stock, after mixing, after shining crosslinked bridging action, electron beam irradiation or gamma rays carry out heating and mould pressing moulding manufacturing operation again, in this manufacturing operation process, be fed into supercritical fluid, allow original supercritical fluid be transformed into gas with the release of pressure means then, then its high expansion rate of mat is that the tractive molten plastic is upheld to all directions stretching alternately, and finishes the shoe-pad and the footwear medium bottom shoes material finished product of preliminary dimension size.
The manufacture method and the finished product of aforesaid shoe-pad and footwear medium bottom shoes material, wherein, this supercritical fluid is by overcritical pressure charging system output.
By above explanation as can be known, the present invention is to be target not add blowing agent and bridging agent in the material of making shoe-pad and footwear medium bottom shoes material, after imposing electron beam irradiation bridge formation or gamma irradiation bridge formation, in the heating and mould pressing process, inject supercritical fluid, be transformed in the process of gas the tractive molten plastic upholds to staggered extension of all directions with the supercritical fluid step-down, finally reach the effect that plastics are evenly expanded, and finish the shoe-pad and the footwear medium bottom shoes material finished product of preliminary dimension.
Description of drawings
Fig. 1 is the manufacture method block schematic diagram of known example.
Fig. 2 is the manufacture method block schematic diagram of the embodiment of the invention.
The specific embodiment
, lift now after following preferable possible embodiments conjunction with figs. is specified in, for reaching above-mentioned purpose about the present invention to disclose feature of the present invention and effect fully.
The present invention molds shoe-pad or footwear medium bottom shoes material for making, so still can select suitable plastics to come moulding basically, the present invention is to be main stock with polyolefin plastics.
The embodiment of the invention sees also shown in Figure 2, crosslinked bridge formation in addition after polyolefin plastics mixed, the effect of its crosslinked bridge formation can be selected to reach with the electron beam irradiation technique, or reaches with gamma rays (r ray) irradiation technique, and these technology all can make plastics reach the effect of crosslinked bridge formation.Material is fed into and is heated into molten plastic and compression molding in the oil pressure automatic moulding machine then, and in this process, can be fed into supercritical fluid (be by a supercritical gas pressure charging system output), when heating-up temperature and the shooting flow scale of construction all reach predetermined value.Supercritical fluid is released (falling) pressure immediately and done to be transformed into gas and the evenly effect of expansion in molten plastic, make and follow the molten plastic overall volume evenly to expand just as the foaming effect as the known interpolation blowing agent, when being cooled to delivery at last, finished end finished product in the shoe-pad of preliminary dimension size or the footwear, and further make subsequent treatment.
The present invention promptly once carried out tentative trial-production at the end in polyolefin shoe-pad and the footwear, and confirmed respond well in R﹠D process.Now with reference formulation, study record and test rerum natura record is detailed list in after.
One, the reference formulation that the end adopts in polyolefin shoe-pad of the present invention, the footwear is as follows:
| Raw material | mPE | EPDM | LDPE | LLDPE | CaCO 3 |
| Percentage | 0-30 | 0-30 | 10-60 | 0-30 | 0-10 |
MPE: density range 0.86-0.91 (g/cm
3) ASTM D-792
Melt flow index＜0.5-30(dg/min)ASTM D-1238
Mooney viscosity 1.5-48(ML 1+4 at 121℃)ASTM D-1646
DSC melting peak 33-103(℃)Rate 10℃/min
Hardness 50-96(shore：A)ASTM D-2240
EPDM: density range 0.86-0.98 (g/cm
3) ASTM D-792
Mooney viscosity 19-80(ML 1+4 at 125℃)ASTM D-1646
Ethylene contents 43-85 (%) ASTM D-6047
LDPE: density range 0.91-0.92 (g/cm
3) ASTM D-792
Melt flow index 0.2-10(g/10min)ASTM D-1238
DSC melting peak 106-113(℃)Rate 10℃/min
Softening point 88-100 (℃) ASTM D-1525
LLDPE: density range 0.91-0.92 (g/cm
3) ASTM D-1505
Melt flow index 1.0-2.0(g/10min)ASTM D-1238
DSC melting peak 121-124(℃)Rate 10℃/min
Softening point 93-103 (℃) ASTM D-1525
CaCO
3: average grain diameter 0.8-7.4micron
True specific gravity 2.7 (g/cm
3)
Electron beam irradiation reference dose: 2-10Mrad
Gamma rays irradiation reference dose: 2-10Mrad
Mold pressing gas perfusion reference conditions:
| Molding temperature (℃) | Clamp time (minute) | Perfusion gas | Perfusion gas pressure (psi) |
| 80-170 | 5-240 | CO 2，N 2 | 1000-5000 |
Two, the trial production of the present invention through repeating, it is as follows to exemplify example:
[example one: shoe-pad is made]
1. fill a prescription and percentage
| Raw material name of an article specification | 7467 | 3722P | 5316 | LL120 | UCML1 |
| Percentage | 20 | 10 | 55 | 10 | 5 |
7467,3722P (DuPont Dow Elastomers company, polyolefin elastomer)
5316 (Han Hua company, polyvinyl resins)
LL120 (platform gathers company, linear polyethylene resin)
UCML1 (platform is moulded company, calcium carbonate)
2. mix
Mixing Roller: temperature is set 135 ℃
3. electron beam irradiation
Exposure dose 5.6Mrad
4. mold pressing supercritical fluid perfusion
Gas pressure: 4000psi
Mould temperature: 120 ℃
Infusion time: 15 minutes
Perfusion gas: N
2
5. test rerum natura
| Shoe-pad (before the moulding) | Shoe-pad (after the moulding) | METHOD | |
| Proportion SPECIFIC GRAVITY TEST | 0.117 | 0.161 | ASTM-D297 |
| Hardness HARDNESS TEST, TYPE C | 31-33 | 44-45 | ASTM-D2240 |
| Stretching resistance TENSILESTRENGTHkg/cm2 | 15.36 | 18.79 | ASTM-D412 |
| Percentage elongation ELONGATION TEST (%) | 158 | 186 | ASTM-D412 |
| Tear edge TEARING TEST (kg/cm) | 6.01 | 8.69 | ASTM-D624 |
| Peeling force SPLIT TEAR TEST (kg/cm) | 0.91 | 1.63 | BS 5131 |
| Compress askew COMPRESSION SET TEST (%) | 67.21 | 49.03 | CNS-3560 |
[example two: the end, make in the footwear]
1. fill a prescription and percentage
| Raw material name of an article specification | 8003 | 5316 | LL120 | UCML1 |
| Percentage | 25 | 55 | 15 | 5 |
8003 (DuPont Dow Elastomers company, polyolefin elastomers)
5316 (Han Hua company, polyvinyl resins)
LL120 (platform gathers company, linear polyethylene resin)
UCML1 (platform is moulded company, calcium carbonate)
2. mix
Mixing Roller: temperature is set 135 ℃
3. gamma rays irradiation
Exposure dose 6.4Mrad
4. mold pressing supercritical fluid perfusion
Gas pressure: 4000psi
Mould temperature: 155 ℃
Infusion time: 3 hours 30 minutes
Perfusion gas: N
2
5. test rerum natura
| Foam | Phylon | METHOD | |
| Proportion SPECIFIC GRAVITY TEST | 0.087 | 0.113 | ASTM-D297 |
| Hardness HARDNESS TEST, TYPE C | 44-46 | 56-58 | ASTM-D2240 |
| Stretching resistance TENSILE STRENGTH kg/cm2 | 20.33 | 29.64 | ASTM-D412 |
| Percentage elongation ELONGATION TEST (%) | 165 | 180 | ASTM-D412 |
| Tear edge TEARING TEST (kg/cm) | 7.32 | 10.52 | ASTM-D624 |
| Peeling force SPLIT TEAR TEST (kg/cm) | 0.92 | 1.38 | BS 5131 |
| Compress askew COMPRESSION SET TEST (%) | 68.65 | 52.95 | CNS-3560 |
| Backwash elasticity ENERGY RETURN TEST (%) | 40 | 42 | CNS-3561 |
| Shrinkage factor SHRINKAG TEST (%) | -2.5 | -1.5 | 70℃，40min |
By above explanation as can be known, the present invention is to be target not add blowing agent and bridging agent in the material of making shoe-pad and footwear medium bottom shoes material, after imposing electron beam irradiation bridge formation or gamma irradiation bridge formation, in the heating and mould pressing process, inject supercritical fluid, be transformed in the process of gas the tractive molten plastic upholds to staggered extension of all directions with the supercritical fluid step-down, finally reach the effect that plastics are evenly expanded, and finish the shoe-pad and the footwear medium bottom shoes material finished product of preliminary dimension.And this technological means and the space kenel reached are when making the footwear material at the end in shoe-pad or the footwear, institute is never thought to reach or the adopter, the present invention studies through researching and developing many times, gets controllable stable processing procedure and finished product eventually, and confirms that its effect is good with blowing agent and bridging agent person more fully.
Claims (2)
1. the manufacture method and the finished product of shoe-pad and footwear medium bottom shoes material, with polyolefin is main stock, after mixing, after shining crosslinked bridging action, electron beam irradiation or gamma rays carry out heating and mould pressing moulding manufacturing operation again, in this manufacturing operation process, be fed into supercritical fluid, allow original supercritical fluid be transformed into gas with the release of pressure means then, then its high expansion rate of mat is that the tractive molten plastic is upheld to all directions stretching alternately, and finishes the shoe-pad and the footwear medium bottom shoes material finished product of preliminary dimension size.
2. the manufacture method and the finished product of shoe-pad as claimed in claim 1 and footwear medium bottom shoes material is characterized in that, this supercritical fluid is by overcritical pressure charging system output.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 200410090762 CN1772466A (en) | 2004-11-08 | 2004-11-08 | Making process and product of shoe sole and middle insole |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 200410090762 CN1772466A (en) | 2004-11-08 | 2004-11-08 | Making process and product of shoe sole and middle insole |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN1772466A true CN1772466A (en) | 2006-05-17 |
Family
ID=36759693
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 200410090762 Pending CN1772466A (en) | 2004-11-08 | 2004-11-08 | Making process and product of shoe sole and middle insole |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN1772466A (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2018098808A1 (en) * | 2016-12-02 | 2018-06-07 | 东莞海锐思高分子材料科技有限公司 | Method of preparing foamed structure |
| WO2020082484A1 (en) * | 2018-10-24 | 2020-04-30 | 广东奔迪新材料科技有限公司 | Method for preparing multi-color, multi-density sole having different materials, and multi-color, multi-density sole prepared using the method |
-
2004
- 2004-11-08 CN CN 200410090762 patent/CN1772466A/en active Pending
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2018098808A1 (en) * | 2016-12-02 | 2018-06-07 | 东莞海锐思高分子材料科技有限公司 | Method of preparing foamed structure |
| WO2020082484A1 (en) * | 2018-10-24 | 2020-04-30 | 广东奔迪新材料科技有限公司 | Method for preparing multi-color, multi-density sole having different materials, and multi-color, multi-density sole prepared using the method |
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