CN105066813A - Method for measuring neck-in ratio of polypropylene microporous membrane in manufacturing process - Google Patents
Method for measuring neck-in ratio of polypropylene microporous membrane in manufacturing process Download PDFInfo
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- CN105066813A CN105066813A CN201510477585.0A CN201510477585A CN105066813A CN 105066813 A CN105066813 A CN 105066813A CN 201510477585 A CN201510477585 A CN 201510477585A CN 105066813 A CN105066813 A CN 105066813A
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Abstract
The invention relates to a method for measuring a neck-in ratio of a polypropylene microporous membrane in manufacturing process. The method comprises the steps of: I, preparing test tools including a snap line ink fountain, a ruler, a right-angle ruler, a calculator and a basal membrane roll to be stretched; II, unwinding a section of stretching front membrane surface of the basal membrane roll, marking the stretching front membrane surface by using the snap line ink fountain and the ruler, marking two straight lines which are vertical to the longitudinal direction and penetrate the transverse direction of the stretching front membrane surface, and then winding the stretching front membrane surface marked with the two straight lines into the basal membrane roll; III, placing the basal membrane roll in a longitudinal stretcher for high-temperature stretching during which unequal proportional neck in is generated so that the two marked straight lines become two arcs; IV, and cutting off the stretching front membrane surface, measuring distances between different point positions of the two arcs longitudinally, and calculating the neck-in ration of the basal membrane surface according to variation of the distances between the different point positions. The method provided by the invention can measure the neck-in ratios of different positions directly, and can be used for comparing transverse neck-in distribution states.
Description
Technical field
The present invention relates to the technical field of method of testing, especially a kind of method measuring microporous polypropylene membrane processing procedure contracting amplitude-frequency.
Background technology
Microporous polypropylene membrane has a wide range of applications in the field such as lithium ion battery, UF membrane, is the product that a kind of added value is higher.Microporous polypropylene membrane is by wet method and dry process.Dry method tension can be divided into two-way and unilateral stretching.Dry method is melt extruded by polyolefin resin, after crystallization thermal treatment, stretches at low temperatures and produce crazing, be then at high temperature drawn into microporous polypropylene membrane.Basement membrane is entered to draw longitudinal stretching machine by unreeling machine, stretches, then enter coiling machine harvest volume through longitudinally drawing.At high temperature unilateral stretching, longitudinal direction can produce the behavior narrowed, i.e. contracting width, and difference position exists the contracting width of different proportion, makes edge and middle part produce thickness deviation.
Because longitudinal stretching machine roller spacing is different, every root stretching roller arranges draw speed ratio and the setting of stretching roller temperature is different, and the contracting width longitudinally produced is also different.In production run, face remains motion state, brings difficulty to the measurement of contracting width.Microporous polypropylene membrane manufacturer, multipair greatly this can not Validity Test, and then quality and the product homogeneity of technological parameter can not be evaluated.In order to ensure quality, microporous polypropylene membrane producer by edge deletion, can only become the major reason that product yield reduces.If the horizontal contracting width of unilateral stretching is uneven, be seriously unfavorable for the quality of production and the cost of microporous polypropylene membrane, the contracting width simultaneously produced does not have corresponding measuring method yet.
Summary of the invention
The technical problem to be solved in the present invention is: in order to solve the problem proposed in above-mentioned background technology, the invention provides a kind of method measuring microporous polypropylene membrane processing procedure contracting amplitude-frequency, directly can measure diverse location contracting amplitude ratio example, can also more horizontal contracting width distribution.
The technical solution adopted for the present invention to solve the technical problems is: a kind of method measuring microporous polypropylene membrane processing procedure contracting amplitude-frequency, and concrete operation step is as follows:
I, testing tool is got out: snap the line ink fountain, ruler, try square, counter and basement membrane to be tensioned are rolled up;
II, face before the basement membrane volume expansion one section in step I being stretched, snap the line ink fountain and ruler is used to identify on face surface before the stretching, identify two straight lines perpendicular to longitudinal direction, they are respectively the first straight line and the second straight line, article two, straight line runs through the horizontal direction of the front face that stretches, then before mark is had the stretching of two straight lines, face is rolled in basement membrane volume;
III, the basement membrane in step II is provided at longitudinal stretching machine and carries out drawing by high temperature, before in basement membrane volume, mark has the stretching of two straight lines, face forms the rear face that stretches under the effect of longitudinal stretching, because drawing process produces inequality proportion contracting width, two straight lines of mark become two camber lines, and they are respectively the first camber line and the second camber line;
IV, face after the stretching in step III is cut off, more longitudinally measure the distance of two camber line difference positions, according to the change of difference column pitch, calculate the contracting amplitude-frequency of basement membrane face.
The invention has the beneficial effects as follows: a kind of method measuring microporous polypropylene membrane processing procedure contracting amplitude-frequency of the present invention, effectively measure size and the distribution of laterally contracting width, by the analysis to measurement result, instruct technologist can change corresponding technological parameter, contracting amplitude-frequency is effectively controlled, and then is conducive to the lifting of product quality and the reduction of cost.
Accompanying drawing explanation
Below in conjunction with drawings and Examples, the present invention is further described.
Fig. 1 is the structural representation before basement membrane stretches;
Fig. 2 is the structural representation producing contracting width after basement membrane stretches.
Label in accompanying drawing is: face before 1, stretching, 2, snap the line ink fountain, 3, the first straight line, the 4, second straight line, 5, stretch after face, 6, the first camber line, 7, the second camber line, the distance between a, two straight lines, the distance between b, two camber lines between first position, distance between c, two camber lines between second point position, the distance between d, two camber lines thirdly between position.
Embodiment
In conjunction with the accompanying drawings, the present invention is further detailed explanation.These accompanying drawings are the schematic diagram of simplification, only basic structure of the present invention are described in a schematic way, and therefore it only shows the formation relevant with the present invention.
A kind of method measuring microporous polypropylene membrane processing procedure contracting amplitude-frequency of the present invention as depicted in figs. 1 and 2, concrete operation step is as follows:
I, testing tool is got out: snap the line ink fountain 2, ruler, try square, counter and basement membrane to be tensioned are rolled up; Wherein snap the line ink fountain 2 line of ink marker diameter is out less than
, and select high temperature resistant quick-dry type ink, colorant component is inorganic color, as cadmium red etc.; Ruler resolution is 0.5mm;
II, face 1 before the basement membrane volume expansion one section in step I being stretched, snap the line ink fountain 2 and ruler is used to identify on face 1 surface before the stretching, identify two straight lines perpendicular to longitudinal direction, they are respectively the first straight line 3 and the second straight line 4, article two, straight line runs through the horizontal direction of the front face 1 that stretches, article two, the numerical value of the distance a between straight line is 500mm, before again mark being had the stretching of two straight lines, face 1 is rolled in basement membrane volume, the direction to be tensioned of face 1 before the longitudinal direction of the front face 1 that wherein stretches is and stretches;
III, the basement membrane in step II is provided at longitudinal stretching machine and carries out drawing by high temperature, before in basement membrane volume, mark has the stretching of two straight lines, face 1 forms the rear face 5 that stretches under the effect of longitudinal stretching, because drawing process produces inequality proportion contracting width, two straight lines of mark become two camber lines, they are respectively the first camber line 6 and the second camber line 7, namely the first straight line 3 becomes the first camber line 6, second straight line 4 and becomes the second camber line 7;
IV, face 5 after the stretching in step III is cut off, more longitudinally measure the distance of two camber line difference positions, according to the change of difference column pitch, calculate the contracting amplitude-frequency of basement membrane face.
Calculate first position contracting amplitude-frequency Y1 between two camber lines, formula (A1) is as follows:
Calculate second point position contracting amplitude-frequency Y2 between two camber lines, formula (A2) is as follows:
To calculate between two camber lines thirdly position contracting amplitude-frequency Y3, formula (A3) is as follows:
With above-mentioned according to desirable embodiment of the present invention for enlightenment, by above-mentioned description, relevant staff in the scope not departing from this invention technological thought, can carry out various change and amendment completely.The technical scope of this invention is not limited to the content on instructions, must determine its technical scope according to right.
Claims (1)
1. measure a method for microporous polypropylene membrane processing procedure contracting amplitude-frequency, it is characterized in that: concrete operation step is as follows:
I, testing tool is got out: snap the line ink fountain (2), ruler, try square, counter and basement membrane to be tensioned are rolled up;
II, face (1) before the basement membrane volume expansion one section in step I being stretched, snap the line ink fountain (2) and ruler is used to identify on face (1) surface before the stretching, identify two straight lines perpendicular to longitudinal direction, they are respectively the first straight line (3) and the second straight line (4), article two, straight line runs through the horizontal direction of the front face (1) that stretches, then before mark is had the stretching of two straight lines, face (1) is rolled in basement membrane volume;
III, the basement membrane in step II is provided at longitudinal stretching machine and carries out drawing by high temperature, before in basement membrane volume, mark has the stretching of two straight lines, face (1) forms the rear face (5) that stretches under the effect of longitudinal stretching, because drawing process produces inequality proportion contracting width, two straight lines of mark become two camber lines, and they are respectively the first camber line (6) and the second camber line (7);
IV, face (5) after the stretching in step III is cut off, more longitudinally measure the distance of two camber line difference positions, according to the change of difference column pitch, calculate the contracting amplitude-frequency of basement membrane face.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201510477585.0A CN105066813A (en) | 2015-08-06 | 2015-08-06 | Method for measuring neck-in ratio of polypropylene microporous membrane in manufacturing process |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201510477585.0A CN105066813A (en) | 2015-08-06 | 2015-08-06 | Method for measuring neck-in ratio of polypropylene microporous membrane in manufacturing process |
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| CN105066813A true CN105066813A (en) | 2015-11-18 |
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| CN201510477585.0A Pending CN105066813A (en) | 2015-08-06 | 2015-08-06 | Method for measuring neck-in ratio of polypropylene microporous membrane in manufacturing process |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105418950A (en) * | 2015-12-18 | 2016-03-23 | 江苏安瑞达新材料有限公司 | Preparation process of polypropylene microporous membrane containing cross-linking structure |
Citations (4)
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| GB1487931A (en) * | 1973-10-12 | 1977-10-05 | Westinghouse Electric Corp | Strain gauge apparatus |
| CN101655363A (en) * | 2009-09-04 | 2010-02-24 | 奇瑞汽车股份有限公司 | Method for testing size changing rate of battery diaphragm |
| CN202453244U (en) * | 2011-12-14 | 2012-09-26 | 北汽福田汽车股份有限公司 | Scale distance marking device for tensile test specimen |
| CN203116690U (en) * | 2013-01-31 | 2013-08-07 | 西南铝业（集团）有限责任公司 | Stretching rate measurer |
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2015
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Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| GB1487931A (en) * | 1973-10-12 | 1977-10-05 | Westinghouse Electric Corp | Strain gauge apparatus |
| CN101655363A (en) * | 2009-09-04 | 2010-02-24 | 奇瑞汽车股份有限公司 | Method for testing size changing rate of battery diaphragm |
| CN202453244U (en) * | 2011-12-14 | 2012-09-26 | 北汽福田汽车股份有限公司 | Scale distance marking device for tensile test specimen |
| CN203116690U (en) * | 2013-01-31 | 2013-08-07 | 西南铝业（集团）有限责任公司 | Stretching rate measurer |
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| 广东省佛山市塑料一厂: "《GB 10003-88 通用型双向拉伸聚丙烯薄膜》", 1 July 1989 * |
| 晨光化工研究院等: "《GB 1040-79 塑料拉伸试验方法》", 1 May 1979 * |
| 杨绪普等: "《基础力学实验竞赛教程》", 30 November 2012, 中国铁道出版社 * |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105418950A (en) * | 2015-12-18 | 2016-03-23 | 江苏安瑞达新材料有限公司 | Preparation process of polypropylene microporous membrane containing cross-linking structure |
| CN105418950B (en) * | 2015-12-18 | 2017-11-28 | 江苏安瑞达新材料有限公司 | A kind of preparation technology of the polypropylene micropore diaphragm containing cross-linked structure |
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Application publication date: 20151118 |
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