CN103837397A - Method for testing tearing strength of rubber - Google Patents
Method for testing tearing strength of rubber Download PDFInfo
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- CN103837397A CN103837397A CN201210487582.1A CN201210487582A CN103837397A CN 103837397 A CN103837397 A CN 103837397A CN 201210487582 A CN201210487582 A CN 201210487582A CN 103837397 A CN103837397 A CN 103837397A
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Abstract
The invention discloses a method for testing the tearing strength of rubber. The method comprises the steps: making a trouser-shaped test sample, testing a force required by tearing the trouser-shaped test sample, and calculating the trouser-shaped tearing strength of the rubber according to the force, wherein the step of making the trouser-shaped test sample comprises the following procedures: 1, respectively laying canvas on the upper surface and the lower surface of un-vulcanized rubber along the long side, wherein the size of the canvas is as follows: the length of the canvas is equal to that of the un-vulcanized rubber, the width of the canvas is equal to the depth of cutting the test sample prepared in the subsequent procedure; 2, vulcanizing the un-vulcanized rubber on which the canvas is laid to obtain a test block; and 3, cutting the test block into a test sample to ensure that the canvas with same area covers one side of each test sample, and cutting the test sample from one side of the test sample, which is covered with the canvas, to obtain the trouser-shaped test sample, wherein the cutting depth is the width of the canvas. Compared with the prior art, the method has the advantages that the deformation energy is effectively eliminated by the trouser-shaped tearing strength measured from the trouser-shaped test sample made by adopting the method, and the testing result is capable of more really reflecting the tearing strength of the rubber.
Description
Technical field
The present invention relates to the method for testing of rubber performance, be specifically related to a kind of method of testing of rubber tear strength.
Background technology
At present domestic the mensuration of rubber tear strength is undertaken by GB/T529-2008, the mensuration of the rubber tear strength of wherein announcing has three kinds of test methods, comprises that A uses trousers shape sample; B uses right angle sample, comprises scarfing or scarfing not; C uses the crescent sample that has scarfing.Above-mentioned three kinds of methods are all by measuring power required sample tear fracture divided by sample thickness, thereby obtain corresponding trousers shape tear strength, without scarfing square tear strength with have scarfing square tear strength or crescent tear strength.In recent years, existing researcher in the industry points out, no matter adopt any method in above-mentioned three kinds of methods, after the clamper of tension tester fully clamps sample in the process of tear fracture sample, the two ends that are torn can produce distortion significantly, also do not produce tear veritably before test result show as pulling strengrth, to the deformation energy and the tearing energy that have comprised rubber in the test result of gained occur really to tear, and in data often deformation energy occupied larger number percent, thereby visible, directly adopt above-mentioned three kinds of methods can not reflect truly the tearing energy of rubber inside, also just can not directly reflect the tear strength of rubber.
Summary of the invention
The technical problem to be solved in the present invention is to provide a kind of method of testing of new rubber tear strength, the method by the initiating terminal of sample to reinforcing with sail face in the scope of cutting port depth, effectively eliminate rubber deformation, make test result can reflect more really the tear strength of rubber.
The method of testing of rubber tear strength of the present invention, comprises and makes trousers shape sample, tests power required while tearing this trousers shape sample, calculates the trousers shape tear strength of rubber according to this power; Unlike the prior art:
In the time making trousers shape sample, comprise the following steps:
1) flush paving one deck canvas along its long limit respectively at upper surface and the lower surface of uncured rubber, canvas is of a size of: the long length that is equal to uncured rubber, the wide degree of depth of the follow-up sample making being carried out to scarfing that is equal to;
2) the not sulfuration of completing canvas is vulcanized, obtain test piece;
3) test piece is cut into sample, make a side of each sample all be coated with canvas of the same area, and sample is carried out to scarfing from a side that is coated with canvas, the degree of depth of scarfing is the width of aforementioned canvas, obtains trousers shape sample.
In said method, in the time making trousers shape sample, the wide of described canvas is 35～50mm.
In said method, in the time making trousers shape sample, the thickness of described sample can be 5.0～6.0mm.
In said method, in the time making trousers shape sample, the degree of depth of described scarfing is generally 35～50mm.
The parameter of described canvas is that 1400dtex/1 × 1400dtex/1 warp-wise and latitudinal density are 58 ± 3.
In said method, the test method of test required power while tearing described trousers shape sample, and all carry out with reference to GB/T529-2008 according to trousers shape tear strength formula and method that the above-mentioned power recording is calculated rubber.
Compared with prior art, the present invention vulcanizes after the part surface of uncured rubber is reinforced with canvas again, sulfidation combines together canvas and glue, make trousers shape sample and test through cutting into again, owing to being the part after reinforcing with canvas by the part of the clamp holder clamping of tension tester in test process, therefore after clamper fully clamps sample in the process of tear fracture sample, clamped part can not produce distortion substantially, thereby reach the object of effective elimination rubber deformation, therefore, test result can reflect the tearing energy of rubber inside more realistically, thereby reflect more realistically the tear strength of rubber.
Accompanying drawing explanation
Fig. 1 is the structural representation of completing the uncured rubber of canvas in the embodiment of the present invention 1;
Fig. 2 is the structural representation of the sample that makes in the embodiment of the present invention 1;
Fig. 3 is the view that the trousers shape sample that makes in the embodiment of the present invention 1 sandwiches clamper.
Number in the figure is:
1 uncured rubber; 2 canvas; 3 samples; 4 clampers.
Embodiment
With embodiment, the invention will be further described below, but the present invention is not limited to these embodiment.
Embodiment 1
(1) make trousers shape sample 3, comprise the following steps:
1) one of cutting is of a size of the uncured rubber 1 (being elastomeric compound) of 250mm × 125mm × 5mm (long × wide × thick), upper surface and lower surface at uncured rubber 1 flush paving one deck canvas 2 along its long limit respectively, canvas 2 is of a size of 125mm × 50mm (long × wide), when tiling, the long limit of canvas 2 flushes and overlaps with the long limit of uncured rubber 1, the minor face of canvas 2 flushes with the minor face of uncured rubber 1, as shown in Figure 1;
2) uncured rubber 1 of completing canvas 2 is vulcanized by existing routine techniques according to the sizing compound formula of uncured rubber 1, obtain test piece;
3) test piece is not had its length direction evenly cut into 5 samples 3 (being undertaken by GB/T529-2008 while cutting), make the upper and lower surface of a side of each sample 3 all be coated with canvas 2 of the same area, each sample 3 is of a size of 125mm × 50mm × 5mm (long × wide × thick), as shown in Figure 2, and sample 3 is carried out to scarfing from a side that is coated with canvas 2, scarfing is positioned at the center of sample 3 width, and degree of depth 50mm obtains trousers shape sample;
(2) with reference to GB/T529-2008, trousers shape sample obtained above is placed in and on the clamper 4 of corresponding tension tester, clamps (as shown in Figure 3), and test power required while tearing this trousers shape sample, calculate the trousers shape tear strength of rubber according to the power of this gained.
By filling a prescription shown in following A 1～A4, B5～B6, technique is routinely carried out mixing, make again vulcanizate, and vulcanizate is pressed to its hardness of respective country standard test, 300% stress at definite elongation, pulling strengrth, elongation at rupture, setafter break and crescent tear strength, result is as shown in following table 1 and table 2; Simultaneously, again the technique routinely of filling a prescription shown in following A 1～A4, B5～B6 is carried out mixing, the elastomeric compound (being uncured rubber 1) obtaining is made trousers shape sample by above-described embodiment 1, then tests the trousers shape tear strength of the trousers shape sample making, and result is as shown in following table 1 and table 2.
Formula A1: rubber constituent: 100 weight portions, N220/ white carbon: 53.0 weight portions, activating agent: 7.0 weight portions, aging resister: 5.5 weight portions, softening agent: 6.0 weight portions, vulcanization accelerator: 2.5 weight portions; Rubber constituent is NR.
Formula A2: A1 is different from formula, and rubber constituent is made up of NR 80 weight portions and SBR 20 weight portions.
Formula A3: A1 is different from formula, and rubber constituent is made up of NR 60 weight portions and SBR 40 weight portions.
Formula A4: A1 is different from formula, and rubber constituent is made up of NR 80 weight portions and BR 20 weight portions.
Formula B5: rubber constituent: 100 weight portions (NR 70/SBR150230), N220:53.0 weight portion, activating agent: 7.0 weight portions, aging resister: 5.5 weight portions, softening agent: 6.0 weight portions, vulcanization accelerator: 2.5 weight portions.
Formula B6: B5 is different from formula, and reinforcement system is N22045.0 weight portion/White Carbon black 10.0 weight portions.
Formula B7: B5 is different from formula, and reinforcement system is N22045.0 weight portion/White Carbon black 10.0 weight portions/Si-69 1 weight portion.
Formula B8: B5 is different from formula, and reinforcement system is N22038.0 weight portion/White Carbon black 15.0 weight portions.
Table 1: different elastic body formulas and the contrast of test physical and mechanical properties
Table 2: different reinforcement systems and the contrast of test physical and mechanical properties
In above-mentioned table, data show, by method described in the application make trousers shape tear strength that trousers shapes sample records effective ground eliminated deformation energy, test result can reflect the tearing energy of rubber inside more realistically, thereby reacts more realistically the tear strength of rubber.
Claims (4)
1. the method for testing of rubber tear strength, comprises and makes trousers shape sample, tests power required while tearing this trousers shape sample, calculates the trousers shape tear strength of rubber according to this power; It is characterized in that:
In the time making trousers shape sample, comprise the following steps:
1) flush paving one deck canvas (2) along its long limit respectively at upper surface and the lower surface of uncured rubber (1), canvas (2) is of a size of: the long length that is equal to uncured rubber (1), the wide degree of depth of the follow-up sample making (3) being carried out to scarfing that is equal to;
2) the not sulfuration that will complete canvas (2) is vulcanized, and obtains test piece;
3) test piece is cut into sample (3), make a side of each sample (3) all be coated with canvas of the same area (2), and sample (3) is carried out to scarfing from a side that is coated with canvas (2), the degree of depth of scarfing is the width of aforementioned canvas (2), obtains trousers shape sample.
2. the method for testing of rubber tear strength according to claim 1, is characterized in that: the wide 35～50mm of being of described canvas (2).
3. the method for testing of rubber tear strength according to claim 1, is characterized in that: the thickness of described sample (3) is 5.0～6.0mm.
4. according to the method for testing of the rubber tear strength described in claim 1,2 or 3, it is characterized in that: the degree of depth of described scarfing is 35～50mm.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201210487582.1A CN103837397B (en) | 2012-11-26 | 2012-11-26 | The method of testing of tear strength of vulcanizate |
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| Application Number | Priority Date | Filing Date | Title |
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| CN201210487582.1A CN103837397B (en) | 2012-11-26 | 2012-11-26 | The method of testing of tear strength of vulcanizate |
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| CN103837397A true CN103837397A (en) | 2014-06-04 |
| CN103837397B CN103837397B (en) | 2015-10-28 |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105319122A (en) * | 2015-08-12 | 2016-02-10 | 贵州轮胎股份有限公司 | Testing method for cutting resistance and puncture resistance of vulcanized rubber |
| CN109238956A (en) * | 2017-07-10 | 2019-01-18 | 郑州大学 | Tear test method in thin wall flexible material face |
Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2008050074A (en) * | 2006-08-22 | 2008-03-06 | Bridgestone Corp | Conveyor belt and its jointing method |
-
2012
- 2012-11-26 CN CN201210487582.1A patent/CN103837397B/en not_active Expired - Fee Related
Patent Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2008050074A (en) * | 2006-08-22 | 2008-03-06 | Bridgestone Corp | Conveyor belt and its jointing method |
Non-Patent Citations (2)
| Title |
|---|
| 张继川，等: "割口对胶料撕裂性能测定结果的影响", 《橡胶工业》, 30 September 2004 (2004-09-30), pages 563 - 566 * |
| 陈大志，等: "橡胶撕裂强度(裤形试样)测量不确定度的评定", 《西部皮革》, 31 July 2012 (2012-07-31), pages 32 - 35 * |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105319122A (en) * | 2015-08-12 | 2016-02-10 | 贵州轮胎股份有限公司 | Testing method for cutting resistance and puncture resistance of vulcanized rubber |
| CN109238956A (en) * | 2017-07-10 | 2019-01-18 | 郑州大学 | Tear test method in thin wall flexible material face |
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| CN103837397B (en) | 2015-10-28 |
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