CN104347447A - EVA (ethylene-vinyl acetate copolymer) cross-linking rate test method - Google Patents
EVA (ethylene-vinyl acetate copolymer) cross-linking rate test method Download PDFInfo
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- CN104347447A CN104347447A CN201410467898.3A CN201410467898A CN104347447A CN 104347447 A CN104347447 A CN 104347447A CN 201410467898 A CN201410467898 A CN 201410467898A CN 104347447 A CN104347447 A CN 104347447A
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- eva
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- crosslinking rate
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01L—SEMICONDUCTOR DEVICES NOT COVERED BY CLASS H10
- H01L22/00—Testing or measuring during manufacture or treatment; Reliability measurements, i.e. testing of parts without further processing to modify the parts as such; Structural arrangements therefor
- H01L22/10—Measuring as part of the manufacturing process
- H01L22/12—Measuring as part of the manufacturing process for structural parameters, e.g. thickness, line width, refractive index, temperature, warp, bond strength, defects, optical inspection, electrical measurement of structural dimensions, metallurgic measurement of diffusions
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01L—SEMICONDUCTOR DEVICES NOT COVERED BY CLASS H10
- H01L22/00—Testing or measuring during manufacture or treatment; Reliability measurements, i.e. testing of parts without further processing to modify the parts as such; Structural arrangements therefor
- H01L22/20—Sequence of activities consisting of a plurality of measurements, corrections, marking or sorting steps
Abstract
The invention discloses an EVA (ethylene-vinyl acetate copolymer) cross-linking rate test method. According to the method, EVAs in the same specification are divided into two completely identical sample groups, the first sample group adopts a chemical method for testing the cross-linking rate, and the second sample group is used for testing the mechanical property; the one-to-one correspondence relationship between the cross-linking rate and the mechanical property of the EVAs in the specification under different lamination conditions is obtained; the mechanical property parameter of an EVA product to be tested with the same specification as the EVA samples after the lamination is obtained through measurement, in addition, the obtained mechanical property parameter is compared with the correspondence relationship, and the cross-linking rate value of the EVA product to be tested can be obtained. When the EVA cross-linking rate test method provided by the invention is adopted, the EVA cross-linking rate can be fast and effectively detected, the condition that test personnel contact poisonous gas of xylene for a long time is avoided, the environment pollution is reduced, in addition, the equipment is simple, and the realization is easy.
Description
Technical field
The present invention relates to manufacture of solar cells technical field, particularly a kind of method of testing of EVA crosslinking rate.
Background technology
In existing solar module manufacture process, normally backboard, EVA, the solar cell string connected by welding, EVA, face glass are laid from the bottom to top, then obtain solar module through laminating technology.EVA adhesive film plays a part bonding and fixes and sealing, and therefore, EVA adhesive film must have good ageing resistance and higher mechanical strength.EVA crosslinking rate is the important measurement index of EVA performance, current photovoltaic mostly adopts in the industry the method for xylene extraction to detect the crosslinking rate of EVA, dimethylbenzene has certain toxicity to human body and can cause the pollution of environment, and testing process needs long-time heating, consuming time longer.Patent CN103608669A discloses a kind of method using differential thermometric analysis characterized by techniques ethene and vinyl acetate copolymer (EVA), and this method testing cost is higher and consuming time also longer; Patent CN103795342A discloses a kind of apparatus and method adopting the sonic detection EVA degree of cross linking, but the method is subject to the impact of solar module other parts.
Therefore, the method for testing that a kind of new EVA crosslinking rate is provided is necessary.
Summary of the invention
The object of the invention is the method for testing providing a kind of new EVA crosslinking rate, can detect EVA crosslinking rate quickly and efficiently, avoids tester's Long contact time dimethylbenzene toxic gas, reduces environmental pollution, and equipment is simple, is easy to realize.
For achieving the above object, the invention provides a kind of method of testing of new EVA crosslinking rate, comprise the following steps:
S1: the EVA sample of same specification is divided into two identical sample sets, is designated the first sample sets, the second sample sets respectively, the described first sample sets EVA sample that include some different lamination obtain corresponding to the second sample sets;
S2: adopt chemical method to carry out crosslinking rate test to the sample of the first sample sets, obtain the crosslinking rate data of EVA sample corresponding to different lamination in the first sample sets;
S3: carry out Mechanics Performance Testing to the sample of the second sample sets, obtains the mechanical property parameters of EVA sample corresponding to different lamination in the second sample sets;
S4: obtain the crosslinking rate of this specification EVA sample under different lamination and the one-to-one relationship of mechanical property parameters;
S5: obtain the EVA product to be measured with the same specification of above-mentioned EVA sample, and Mechanics Performance Testing is carried out to obtain mechanical property parameters to described EVA product;
S6: the corresponding relation that the lamination of EVA product to be measured in S5 and mechanical property parameters and S4 obtain is compared, the crosslinking rate numerical value of EVA product to be measured can be obtained.
As a further improvement on the present invention, S4 step also comprises carries out matching to data according to described corresponding relation and obtains continuous print matched curve in reference axis, and the crosslinking rate numerical value of the EVA product to be measured wherein in S6 step is specially and obtains according to this matched curve.
As a further improvement on the present invention, adopt chemical method to carry out crosslinking rate test to the sample of the first sample sets, specifically comprise:
There is provided a mesh bag, and to obtain this mesh bag quality be W1;
Get the EVA sample in the first sample sets and put into described mesh bag after being cut into particle of uniform size, the gross mass obtaining mesh bag and EVA sample is W2;
Be immersed in extraction solution by the mesh bag that sample is housed, be heated to extraction solution boiling, extraction solution back-flow velocity is greater than 40 droplets/point, and insulation extraction 3 hours, is placed in flask by mesh bag after completing and cools;
Take out mesh bag air-dry ten minutes to half an hour, then mesh bag is placed in drying box baking 1 hour, drying box temperature is set as 120 degree, after again mesh bag is put into dry 15 minutes of the drier that discolour silica gel is housed;
Obtain dried mesh bag quality W3;
Formula [1-(W2-W3)/(W2-W1)] * 100% is adopted to obtain the crosslinking rate numerical value of this EVA sample.
As a further improvement on the present invention, described extraction solution comprises dimethylbenzene, BHT.
As a further improvement on the present invention, the axis of ordinates of described matched curve is the crosslinking rate of EVA sample.
As a further improvement on the present invention, the abscissa of described matched curve is the stretch modulus of EVA sample.
As a further improvement on the present invention, the point on the axis of abscissas of described matched curve in the corresponding matched curve of a certain coordinate figure, and obtain single ordinate value by the point in matched curve.
The invention has the beneficial effects as follows: the method for testing of EVA crosslinking rate provided by the invention, EVA crosslinking rate can be detected quickly and efficiently, avoid tester's Long contact time dimethylbenzene toxic gas, reduce environmental pollution, and equipment is simple, be easy to realize.
Accompanying drawing explanation
Fig. 1 is instinct inventive method EVA crosslinking rate testing process schematic diagram;
Fig. 2 is the matched curve figure that the crosslinking rate of EVA sample in the inventive method is mutually corresponding with stretch modulus.
Embodiment
Describe the present invention below with reference to execution mode shown in the drawings.But this execution mode does not limit the present invention, the structure that those of ordinary skill in the art makes according to this execution mode, method or conversion functionally are all included in protection scope of the present invention.
Please refer to shown in Fig. 1, the method for testing of EVA crosslinking rate provided by the invention, comprises the following steps S1 ~ S6.
S1: the EVA sample of same specification is divided into two identical sample sets, is designated the first sample sets, the second sample sets respectively, the described first sample sets EVA sample that include some different lamination obtain corresponding to the second sample sets.Such as, each sample sets can comprise as shown in Figure 1 respectively at 1 ~ No. 4 EVA sample that lamination obtains for 1 ~ 4 time, to record crosslinking rate data and the tensile strength data of 1 ~ No. 4 EVA sample respectively, and generates matched curve; Certainly also according to the actual requirements, the EVA sample more than 4 can be set in each sample sets, and then in following S4 step, obtain more accurate matched curve.In the present embodiment, adopt some different lamination times to carry out lamination 142 DEG C time the EVA of same specification, often kind of a lamination has 3 EVA samples, and is divided into two by each sample, carries out the test of chemical method crosslinking rate and hot strength test respectively.Obtain two identical sample sets thus, be designated the first sample sets, the second sample sets respectively.In other embodiments of the present invention, also the technological parameter such as laminating temperature, pumpdown time can be carried out adjustment change and the EVA sample obtained respectively under corresponding lamination.
S2: adopt chemical method to carry out crosslinking rate test to the sample of the first sample sets, obtain the crosslinking rate data of EVA sample corresponding to different lamination in the first sample sets.Namely so-called chemical method uses related chemistry reagent and EVA sample to carry out reacting and obtains the method for described EVA sample crosslinking rate according to the different quality meter reacting front and back, such as common xylene extraction method, specifically comprise: an iron wire mesh bag is provided, adopt scales/electronic balance weighing W1; Get the EVA sample in the first sample sets and put into described iron wire mesh bag after being cut into particle of uniform size, the W2(that weighs adopts stapler to fix described iron wire mesh bag, and now W2 also comprises the quality of staple); The iron wire mesh bag that EVA sample is housed is immersed in extraction solution, described extraction solution comprises dimethylbenzene, 2,6-BHT, wherein, 2,6-BHT, as the poly-resist in course of reaction, prevents EVA secondary cross-linking in dimethylbenzene digestion process, affects the accuracy of data; Be heated to extraction solution boiling, extraction solution back-flow velocity is greater than 40 droplets/point, and insulation extraction 3 hours, is placed in flask by iron wire mesh bag after completing and cools; Take out iron wire mesh bag air-dry ten minutes to half an hour, then iron wire mesh bag is placed in drying box baking 1 hour, drying box temperature is set as 120 degree, after again iron wire mesh bag is put into dry 15 minutes of the drier that discolour silica gel is housed; Electronic balance is adopted to claim to obtain quality W3 dried iron wire mesh bag; Formula [1-(W2-W3)/(W2-W1)] * 100% is adopted to obtain the crosslinking rate numerical value of this EVA sample.
Repeat experiment, obtain three EVA samples are tested by above-mentioned chemical method the crosslinking rate numerical value that obtains three samples respectively and get three on average as the crosslinking rate numerical value of EVA sample under this lamination under same lamination.The crosslinking rate numerical value of EVA sample under the different lamination of the first sample sets is obtained respectively according to said method.
S3: carry out Mechanics Performance Testing to the sample of the second sample sets, obtains the mechanical property parameters of EVA sample corresponding to different lamination in the second sample sets, specifically carries out mechanical stretch strength test to the EVA sample of the second sample sets.Comprise the following steps: the lamination of confirmatory sample specification and correspondence, use dumbbell shape cut-off knife to cut sample; Sample after cutting indicates clamping line, fracture mark line, gauge length line; Gauge length line is apart from 25 ± 0.25mm, and fracture mark line, at a distance of from 60 ± 5mm, clamps line apart from 80 ± 5mm; Be placed in by sample on test fixture and be fixed, fixture is sandwiched in clamping line; Use extensometer to be sandwiched in two gauge length line places, use universal tensile tester to carry out extension test with the speed of 300mm/min.The tensile stress experimentally obtained and dependent variable directly can count to obtain the stretch modulus of this EVA sample.
Repeat experiment, obtain three EVA samples are tested the stretch modulus obtaining three samples as stated above respectively and get three on average as the stretch modulus of EVA sample under this lamination under same lamination.Using such method can count to obtain the stretch modulus of EVA sample under the different lamination of the second sample sets respectively.
S4: obtain the crosslinking rate of this specification EVA sample under different lamination and the one-to-one relationship of mechanical property parameters.And using the crosslinking rate of the first sample sets EVA sample as ordinate, the stretch modulus of the second sample sets EVA sample generates continuous print matched curve (as shown in Figure 2) as abscissa.Point on the axis of abscissas of described matched curve in a certain coordinate figure (stretch modulus) corresponding matched curve, and obtain single ordinate value (crosslinking rate) by the point in matched curve.
S5: obtain the EVA product to be measured with the same specification of above-mentioned EVA sample, and Mechanics Performance Testing is carried out to obtain mechanical property parameters to described EVA product, specifically Mechanics Performance Testing is carried out to this EVA product and obtain corresponding stretch modulus.
S6: the corresponding relation that the lamination of EVA product to be measured in S5 and mechanical property parameters and S4 obtain is compared, the matched curve be specially the lamination of EVA product to be measured in S5 and stretch modulus and S4 obtain is compared, and can obtain the crosslinking rate numerical value of EVA product to be measured.
Further, in actual production process, according to the correspondence position of EVA sample in matched curve, stretch modulus and the variation tendency of crosslinking rate under different lamination in experiment is generated in conjunction with matched curve, clearly can produce the adjustment direction of line laminating technology, contribute to producing informant person and laminating technology condition is adjusted faster.
In sum, the method for testing of EVA crosslinking rate provided by the invention, can detect EVA crosslinking rate quickly and efficiently, avoids tester's Long contact time dimethylbenzene toxic gas, reduces environmental pollution, and equipment is simple, is easy to realize.
Be to be understood that, although this specification is described according to execution mode, but not each execution mode only comprises an independently technical scheme, this narrating mode of specification is only for clarity sake, those skilled in the art should by specification integrally, technical scheme in each execution mode also through appropriately combined, can form other execution modes that it will be appreciated by those skilled in the art that.
A series of detailed description listed is above only illustrating for feasibility execution mode of the present invention; they are also not used to limit the scope of the invention, all do not depart from the skill of the present invention equivalent implementations done of spirit or change all should be included within protection scope of the present invention.
Claims (7)
1. a method of testing for EVA crosslinking rate, is characterized in that, said method comprising the steps of:
S1: the EVA sample of same specification is divided into two identical sample sets, is designated the first sample sets, the second sample sets respectively, the described first sample sets EVA sample that include some different lamination obtain corresponding to the second sample sets;
S2: adopt chemical method to carry out crosslinking rate test to the sample of the first sample sets, obtain the crosslinking rate data of EVA sample corresponding to different lamination in the first sample sets;
S3: carry out Mechanics Performance Testing to the sample of the second sample sets, obtains the mechanical property parameters of EVA sample corresponding to different lamination in the second sample sets;
S4: obtain the crosslinking rate of this specification EVA sample under different lamination and the one-to-one relationship of mechanical property parameters;
S5: obtain the EVA product to be measured with the same specification of above-mentioned EVA sample, and Mechanics Performance Testing is carried out to obtain mechanical property parameters to described EVA product;
S6: the corresponding relation that the lamination of EVA product to be measured in S5 and mechanical property parameters and S4 obtain is compared, the crosslinking rate numerical value of EVA product to be measured can be obtained.
2. method according to claim 1, it is characterized in that: S4 step also comprises carries out matching to data according to described corresponding relation and obtain continuous print matched curve in reference axis, and the crosslinking rate numerical value of the EVA product to be measured wherein in S6 step is specially and obtains according to this matched curve.
3. method according to claim 1, adopts chemical method to carry out crosslinking rate test to the sample of the first sample sets, specifically comprises:
There is provided a mesh bag, and to obtain this mesh bag quality be W1;
Get the EVA sample in the first sample sets and put into described mesh bag after being cut into particle of uniform size, the gross mass obtaining mesh bag and EVA sample is W2;
Be immersed in extraction solution by the mesh bag that sample is housed, be heated to extraction solution boiling, extraction solution back-flow velocity is greater than 40 droplets/point, and insulation extraction 3 hours, is placed in flask by mesh bag after completing and cools;
Take out mesh bag air-dry ten minutes to half an hour, then mesh bag is placed in drying box baking 1 hour, drying box temperature is set as 120 degree, after again mesh bag is put into dry 15 minutes of the drier that discolour silica gel is housed;
Obtain dried mesh bag quality W3;
Formula [1-(W2-W3)/(W2-W1)] * 100% is adopted to obtain the crosslinking rate numerical value of this EVA sample.
4. method according to claim 3, is characterized in that: described extraction solution comprises dimethylbenzene, BHT.
5. method according to claim 2, is characterized in that: the axis of ordinates of described matched curve is the crosslinking rate of EVA sample.
6. method according to claim 5, is characterized in that: the abscissa of described matched curve is the stretch modulus of EVA sample.
7. method according to claim 6, is characterized in that: the point on the axis of abscissas of described matched curve in the corresponding matched curve of a certain coordinate figure, and obtains single ordinate value by the point in matched curve.
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| CN201410467898.3A CN104347447B (en) | 2014-09-15 | 2014-09-15 | A kind of method of testing of EVA crosslinking rate |
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| CN201410467898.3A CN104347447B (en) | 2014-09-15 | 2014-09-15 | A kind of method of testing of EVA crosslinking rate |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109142134A (en) * | 2018-07-18 | 2019-01-04 | 凯盛光伏材料有限公司 | A kind of test method of the photovoltaic module POE glue film degree of cross linking |
| CN109884000A (en) * | 2019-02-28 | 2019-06-14 | 天津英利新能源有限公司 | A kind of degree of cross linking test curve fitting formula method and degree of cross linking detection method |
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| US3798090A (en) * | 1968-12-04 | 1974-03-19 | Hercules Inc | Process for producing cross-linked propellants |
| US4774295A (en) * | 1984-08-18 | 1988-09-27 | Bayer Aktiengesellschaft | Polymer mixtures and covulcanizates produced therefrom |
| JP2000355085A (en) * | 1999-06-15 | 2000-12-26 | Sekisui Chem Co Ltd | Laminate and olefinic resin crosslinked foam |
| CN102967524A (en) * | 2012-12-04 | 2013-03-13 | 韩华新能源（启东）有限公司 | Ethylene vinyl acetate (EVA) crosslinking degree testing method |
| CN203790618U (en) * | 2014-04-16 | 2014-08-27 | 上海贝思特管业有限公司 | Extraction plant for EVA cross linking degree test equipment |
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2014
- 2014-09-15 CN CN201410467898.3A patent/CN104347447B/en active Active
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US3798090A (en) * | 1968-12-04 | 1974-03-19 | Hercules Inc | Process for producing cross-linked propellants |
| US4774295A (en) * | 1984-08-18 | 1988-09-27 | Bayer Aktiengesellschaft | Polymer mixtures and covulcanizates produced therefrom |
| JP2000355085A (en) * | 1999-06-15 | 2000-12-26 | Sekisui Chem Co Ltd | Laminate and olefinic resin crosslinked foam |
| CN102967524A (en) * | 2012-12-04 | 2013-03-13 | 韩华新能源（启东）有限公司 | Ethylene vinyl acetate (EVA) crosslinking degree testing method |
| CN203790618U (en) * | 2014-04-16 | 2014-08-27 | 上海贝思特管业有限公司 | Extraction plant for EVA cross linking degree test equipment |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109142134A (en) * | 2018-07-18 | 2019-01-04 | 凯盛光伏材料有限公司 | A kind of test method of the photovoltaic module POE glue film degree of cross linking |
| CN109884000A (en) * | 2019-02-28 | 2019-06-14 | 天津英利新能源有限公司 | A kind of degree of cross linking test curve fitting formula method and degree of cross linking detection method |
| CN109884000B (en) * | 2019-02-28 | 2021-12-07 | 天津英利新能源有限公司 | Cross-linking degree test curve fitting formula method and cross-linking degree detection method |
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Address after: 215300 Suzhou high tech Zone, Jiangsu, Lu Shan Road, No. 199 Co-patentee after: CANADIAN SOLAR MANUFACTURING (CHANGSHU) Inc. Patentee after: CSI SOLAR POWER GROUP Co.,Ltd. Address before: 215300 Suzhou high tech Zone, Jiangsu, Lu Shan Road, No. 199 Co-patentee before: CANADIAN SOLAR MANUFACTURING (CHANGSHU) Inc. Patentee before: CSI SOLAR POWER (CHINA) Inc. |
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Address after: No. 199, deer mountain road, Suzhou high tech Zone, Jiangsu Province Patentee after: Atlas sunshine Power Group Co.,Ltd. Patentee after: CANADIAN SOLAR MANUFACTURING (CHANGSHU) Inc. Address before: No. 199, deer mountain road, Suzhou high tech Zone, Jiangsu Province Patentee before: CSI SOLAR POWER GROUP Co.,Ltd. Patentee before: CANADIAN SOLAR MANUFACTURING (CHANGSHU) Inc. |
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Effective date of registration: 20221201 Address after: No. 199, deer mountain road, Suzhou high tech Zone, Jiangsu Province Patentee after: Atlas sunshine Power Group Co.,Ltd. Patentee after: CANADIAN SOLAR MANUFACTURING (CHANGSHU) Inc. Patentee after: Suqian atlas Sunshine Energy Technology Co.,Ltd. Address before: No. 199, deer mountain road, Suzhou high tech Zone, Jiangsu Province Patentee before: Atlas sunshine Power Group Co.,Ltd. Patentee before: CANADIAN SOLAR MANUFACTURING (CHANGSHU) Inc. |
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