CN101377484B - Method for measuring polyethylene inserting and twisting net sheet performance for cultivation and dragnet - Google Patents
Method for measuring polyethylene inserting and twisting net sheet performance for cultivation and dragnet Download PDFInfo
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- CN101377484B CN101377484B CN2007100453548A CN200710045354A CN101377484B CN 101377484 B CN101377484 B CN 101377484B CN 2007100453548 A CN2007100453548 A CN 2007100453548A CN 200710045354 A CN200710045354 A CN 200710045354A CN 101377484 B CN101377484 B CN 101377484B
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Abstract
The invention discloses a performance test method for polyethylene inserting-twisting netting used for culture and fishing. The performance of the polyethylene inserting-twisting netting is needed to be correctly tested. The invention comprises sampling of a sample, clipping of the sample, sample humidity conditioning to balance and a sample performance test. The invnetion is characterized in that the part of the sample above the position having the distance of 10 cm with the edge of the netting is got; a dry state sample carries out humidity conditioning to balance for 24 h under the atmospheric condition with the temperature of (20 plus/minus 2) DEG C and the humidity of (65 plus/minus 2) percent, as well as a wet state sample is soaked for 24 h in a vessel with the water temperature of (20 plus/minus 2) DEG C; the length of the sample between two clamps is 0.50 m in a longitudinal (or latitudinal) monofilament rupture strength and breaking elongation test, the distance between two clamps is 0.20 m in a netting rupture strength and breaking elongation test, the sample is forced with speical pre-tension, and the test is carried out on the sample under a set time; efficient test times of the tests are all more than or equal to 20 times, and corresponding arithmetic averages are calculated. The invention is used for the performance test method for the polyethylene inserting-twisting netting used for the culture and the fishing.
Description
Technical field
The present invention relates to polyethylene inserting performance measurement method.
Background technology
Parallel inserts between the line thigh of warp, and the net sheet that constitutes through the twisted warp is called inserting.The inserting surface ratio is good than flat-satin, drainability, and is general with using in the fly net with fishing for net, building safety net and agricultural with enclosing block, shellfish culture cage, the small-sized fishing gear of sea water and fresh water in rivers and lakes aquaculture net cage, bay shellfish culture net cage, rice field or pond culture.Facts have proved that inserting relatively is fit to make culture with etting, fishing gear etting.Along with culturing and the expansion of fishing for polyethylene inserting application, domestic existing many net factory sells the polyethylene inserting in production.For culturing with the net sheet or fishing for fishing net, the net piece performance is the main cause that influences aquaculture net cage or fishing gear safety, intensity and term of life.Reaction is correctly cultured and is fished for performance with the polyethylene inserting, estimates its quality and safety in utilization, provides foundation for aquaculture net cage or fishing gear designer when matching the inserting material, the method of culturing and fishing for polyethylene inserting performance test not only will be arranged, more need the rigorous unification of measuring technology and perfect, to guarantee the rationally effective of test, avoid invalid test and mistake.Any disappearance and the imperfection of assay method, all must cause the incorrect of test result, both selected to culture and fish for to have brought puzzlement, also brought hidden danger, the sustainable sound development of restriction fishery engineering to fish production with polyethylene inserting material to the raiser.
Summary of the invention
The present invention need provide a kind of breed and fish for polyethylene inserting assay method, reaches measurement result and can correctly characterize the performance of culturing and fishing for the polyethylene inserting.
Technical scheme of the present invention comprises the sampling and the sample cutting of net sheet sample, sample damping balance and performance measurement, it is characterized in that sample each position more than distance net sheet edge 10cm obtains, the time do not allow the direction serial sampling that is stretched at sample carrying out the same project test, but when cutting dry state and hygrometric state sample simultaneously, must cut two samples continuously in the direction that sample is stretched at every turn, cut the long otch of 1.2m along inserting through (or latitude) line direction, remove the limit yarn and obtain 40 above length and be at least the long warp (or latitude) of 1.0m, obtain through (or latitude) to monofilament linear density to the knitmesh monofilament, disrumpent feelings brute force and breaking elongation test sample; Cut the long otch of 0.50m along inserting through (or latitude) line direction, removing the limit yarn, to obtain 20 above effective dimensions be the disrumpent feelings brute force of 0.38m length * 0.50m wide screen sheet and breaking elongation test sample, the monofilament radical n of warp direction stretching sample, broadwise tensile sample Width
1, n
2Numerically equal respectively through close, filling density; Cut out the square net sheet of polylith 0.11m along inserting through (or latitude) line direction, cutting off the limit silk, to obtain 20 effective dimensions be that the wide warp of 0.10m length * 0.10m (or latitude) is tested to net sheet mass area ratio and used sample; Sample otch when shearing should be positioned at the centre of adjacent two warps (or latitude) line; The dry state sample soaks 24h at least in the 24h of damping balance at least under the atmospheric conditions of temperature (20 ± 2) ℃, humidity (65 ± 2) %, the hygrometric state sample container in water temperature (20 ± 2) ℃; When netting length is measured the net sheet is positioned on smooth, the dry place, shakeouts and make the net sheet fully to stretch, from an end of net sheet, the order continuous coverage is till the other end of net sheet, and the straight-line dimension that it constituted is netting length; Before disrumpent feelings brute force of monofilament and breaking elongation mensuration, flat mouthful anchor clamps are installed on strength tester through (or latitude), the length of sample is 0.50m between anchor clamps, apply suitable pre-tension, the pre-tension value of dry state sample equals the deadweight of identical rugosity polyethylene monofilament 250m length when disrumpent feelings brute force of monofilament and breaking elongation test, the pre-tension of hygrometric state sample equals the deadweight of identical rugosity 125m polyethylene monofilament length, then the draw speed of sample with 5mm/s stretched until single wire fracture, the filament properties index of sample writes down from the pen recorder of testing machine and calculates; Before the disrumpent feelings brute force of net sheet and breaking elongation are measured, be flat mouth anchor clamps more than the 0.08m in that width is installed on the strength tester, distance between anchor clamps is adjusted into 0.20m, one end of specimen width direction is all entirely sandwiched anchor clamps, at the other end of specimen width direction specific pre-tension in addition, the pre-tension value of dry state sample equals identical rugosity polyethylene monofilament 250n respectively during net sheet warp-wise or broadwise are disrumpent feelings powerful mensuration
1, 250n
2The deadweight of Mi Changdu, the pre-tension of hygrometric state sample equals identical rugosity 125n
1, 125n
2Sandwich down flat mouthful anchor clamps after the deadweight of rice polyethylene monofilament length, under average rupture time (20 ± 2) s of regulation sample is stretched until fracture, the disrumpent feelings brute force of sample and breaking elongation index write down from the pen recorder of testing machine and calculate; With 20 effective dimensions is that the wide warp of 0.10m length * 0.10m (or latitude) is put into weighing on the balance respectively to net sheet sample, calculates the arithmetic mean m of 20 sample masses after the reading numerical values, and then 100m is through (or latitude) to net sheet mass area ratio; Above-mentioned test is effectively measured time number average and is no less than 20 times, and calculates corresponding arithmetic mean.
The present invention provides a kind of simple and clear effective method for solve culturing and the correctness of fishing for polyethylene inserting performance detection and quality assessment, for engineering technical personnel provide reliable basis in aquaculture net cage design and fishing on material selection.
Description of drawings
Fig. 1, culture and fish for polyethylene inserting synoptic diagram.
Fig. 2, culture and fish for the disrumpent feelings brute force of polyethylene inserting and breaking elongation test sample synoptic diagram.
Fig. 3, culture and fish for polyethylene inserting mass area ratio test sample synoptic diagram.
Fig. 4, culture and fish for the polyethylene disrumpent feelings brute force of inserting monofilament and breaking elongation test synoptic diagram.
Fig. 5, culture and fish for the disrumpent feelings brute force of polyethylene inserting and breaking elongation test synoptic diagram.
Embodiment
The present invention is directed to the influence breed and represent, set forth best embodiment of the present invention in conjunction with the accompanying drawings with the atmospheric conditions, test condition, sampling and sample processing, assay method, data processing and the result that fish for polyethylene inserting The performance test results.
Atmospheric conditions: breadboard atmospheric conditions are controlled at temperature (20 ± 2) ℃, humidity (65 ± 2) % in the net piece performance process of the test.
The sample state: the dry state sample is in temperature (20 ± 2) ℃, at least damping balance 24h under the atmospheric conditions of humidity (65 ± 2) %, the hygrometric state sample soaks 24h at least in the container of water temperature (20 ± 2) ℃, make it not have significant difference in continuation immersion longer time back disrumpent feelings brute force of net sheet and breaking elongation, for sample is soaked into fully, also can in water, add and be no more than 0.05% nonionic intermediate wet agent, can adopt nonionic intermediate wet agent as: alkylphenol polyvinylether or polyoxyethylene alkyl ether or polyoxyethylene glycol Arrcostab or polyoxyethylene glycol alkyl aryl ether or acetylene ethylene glycol, sample must reach the requirement of dry state and hygrometric state.
Test condition: the electronic type strength tester uses in allowing range ability, and the mechanical type strength tester should use in the scope of (25～75) of nominal range %.Flat mouthful anchor clamps (3,5 among Fig. 4, Fig. 5) are used in test, and the width of anchor clamps is more than the 0.08m.
The work effective dimensions that warp (2 among Fig. 1) or latitude (1 among Fig. 1) are tested with sample (4 among Fig. 4) to monofilament linear density, disrumpent feelings brute force and breaking elongation is 1.0m, (the L among Fig. 4 of the distance when brute force and test of elongation rate between anchor clamps
1) be 0.50m.
Disrumpent feelings brute force of net sheet warp-wise and breaking elongation test are 0.38m length * 0.50m wide (Fig. 2) with the work effective dimensions of sample, distance (the L in Fig. 5 of sample when brute force and test of elongation rate (6 among Fig. 5) between anchor clamps
2) be 0.20m.
The test of net sheet mass area ratio is 0.10m length * 0.10m wide (Fig. 3) with the work effective dimensions of sample.
The dry state sample equals the deadweight of identical rugosity polyethylene monofilament 250m length through (or latitude) to the pre-tension value of the disrumpent feelings brute force of monofilament and breaking elongation test usefulness, and the hygrometric state sample equals the deadweight of identical rugosity 125m polyethylene monofilament length to the pre-tension of disrumpent feelings brute force of monofilament and breaking elongation test usefulness through (or latitude).
Effective dimensions is that the monofilament radical that disrumpent feelings brute force of 0.38m length * 0.50m wide screen sheet and breaking elongation are tested with warp direction stretching sample, broadwise tensile sample Width is respectively n
1, n
2
The pre-tension value of disrumpent feelings brute force of dry state sample web sheet warp-wise and breaking elongation test usefulness equals identical rugosity polyethylene monofilament 250n
1The deadweight of Mi Changdu, the pre-tension of disrumpent feelings brute force of hygrometric state sample web sheet warp-wise and breaking elongation test usefulness equals identical rugosity 125n
1The deadweight of rice polyethylene monofilament length.
The pre-tension value of disrumpent feelings brute force of dry state sample web sheet broadwise and breaking elongation test usefulness equals identical rugosity polyethylene monofilament 250n
2The deadweight of Mi Changdu, the pre-tension of disrumpent feelings brute force of hygrometric state sample web sheet warp-wise and breaking elongation test usefulness equals identical rugosity 125n
2The deadweight of rice polyethylene monofilament length.
The draw speed of monofilament sample is 5mm/s, and the average rupture time when net sheet sample stretches is (20 ± 3) s.
The sample data that will skid at the anchor clamps place is removed, and other gets a sample and tests again; Allow the lining underbed when monofilament or net sheet extension test in the anchor clamps, to avoid sample to crush or slippage.
Sampling is handled with sample: randomly draw the identical finished product inserting of nominal length 20 volumes, be used for the mensuration of netting length.
Sample otch when shearing should be arranged in the centre of adjacent two weft yarns (Fig. 1 1) or warp thread (Fig. 1 2), with the weft yarn or the warp thread of shearing-proof notching edge.
Sample is obtained apart from each position more than the 10cm at distance net sheet edge, the time do not allow the direction serial sampling that is stretched at sample carrying out the same project test, but when cutting dried (wetting) attitude sample simultaneously, must cut two samples continuously in the direction that sample is stretched at every turn, make that like this each is to carry out containing on the sample of same monofilament to the tension failure performance test, distinguishes dry state sample and hygrometric state sample with alphabetical GT, the ST that is labeled on the sample.
Cut out the square net sheet of polylith 0.11m along inserting through (or latitude) line direction, to obtain 20 effective dimensions be the wide warp of 0.10m length * 0.10m (or latitude) to net sheet mass area ratio test sample so that cut off the limit silk, and distinguish the test of warp-wise net sheet mass area ratio and test with sample, broadwise net sheet mass area ratio and use sample to be labeled in alphabetical JXG, WXG on the sample.
Cut out the wide rectangle net of polylith 1.2m length * 0.5m sheet along inserting through (or latitude) line direction, obtain 20 above length and be at least the long warp (or latitude) of 1.0m to the knitmesh monofilament so that remove latitude (or through) yarn, they are used for through (or latitude) test to disrumpent feelings brute force of monofilament and breaking elongation.
Cut out the square net sheet of polylith 0.51m along inserting through (or latitude) line direction, to obtain 20 above effective dimensions be the test of the disrumpent feelings brute force of 0.38m length * 0.50m wide screen sheet and breaking elongation with sample (Fig. 2) so that cut off the limit yarn, distinguishes the disrumpent feelings brute force of net sheet warp-wise and breaking elongation test and test with sample, the disrumpent feelings brute force of broadwise and breaking elongation and use sample to be labeled in alphabetical JX, WX on the sample.
Assay method: during the inserting length measurment net sheet is positioned on smooth, the dry place, shakeouts and make the net sheet fully to stretch.From an end of net sheet, with the continuous coverage of 10m tape order till the other end of net sheet, the straight-line dimension that it constituted, i.e. netting length.Every volume net sheet is measured once, is accurate to 1mm.
Record effectively is of a size of the monofilament radical n of the wide warp direction stretching sample of 0.38m length * 0.50m (Fig. 2), broadwise tensile sample Width respectively
1, n
2, n then
1, n
2Numerically promptly equal respectively to culture and fish for the polyethylene inserting through close (root/0.05m), filling density (root/0.05m).
With 20 effective dimensions is that the wide warp of 0.10m length * 0.10m (or latitude) is put into weighing on the balance respectively to net sheet sample (Fig. 3), calculate the arithmetic mean m (being accurate to 1mg) of 20 sample masses after the reading numerical values, then 100W is through (or latitude) to net sheet mass area ratio (g/m
2).
Before disrumpent feelings brute force of monofilament and breaking elongation mensuration, flat mouthful anchor clamps are installed on strength tester through (or latitude), the length of sample between anchor clamps (4 among Fig. 4) is 0.50m, (the pre-tension value of dry state sample equals the deadweight of identical rugosity polyethylene monofilament 250m length when disrumpent feelings brute force of monofilament and breaking elongation test to apply suitable pre-tension, the pre-tension of hygrometric state sample equals the deadweight of identical rugosity 125m polyethylene monofilament length), then the draw speed of sample with 5mm/s stretched until single wire fracture, disrumpent feelings brute force of monofilament and elongation at break properties index write down from the pen recorder of testing machine and calculate.
Before the disrumpent feelings brute force of net sheet and breaking elongation are measured, be flat mouth anchor clamps more than the 0.08m in that width is installed on the strength tester, distance between anchor clamps is adjusted into 0.20m, one end of sample (6 among Fig. 5) Width is all entirely sandwiched anchor clamps (3 among Fig. 5), and the order pin is close to mutually, the other end of sample (6 among Fig. 5) Width in addition specific pre-tension (the pre-tension value of dry state sample equals identical rugosity polyethylene monofilament 250n respectively during net sheet warp-wise or broadwise are disrumpent feelings powerful mensuration
1, 250n
2The deadweight of Mi Changdu, the pre-tension of hygrometric state sample equals identical rugosity 125n
1, 125n
2The deadweight of rice polyethylene monofilament length) sandwiches down flat mouthful anchor clamps (5 among Fig. 5) after, the regulation average rupture time (20 ± 3) s under to sample stretch until the fracture (, the sample data that will skid at the anchor clamps place is removed, other gets a sample and tests again), the disrumpent feelings brute force of sample and breaking elongation index write down from the pen recorder of testing machine and calculate.
Above-mentioned test is effectively measured time number average and is no less than 20 times, and calculates netting length respectively, through close, filling density, do (wetting) attitude warp-wise net sheet mass area ratio, do (wetting) attitude broadwise net sheet mass area ratio, do disrumpent feelings brute force of (wetting) attitude warp monofilament and breaking elongation, do disrumpent feelings brute force of (wetting) attitude fill monofilaments and breaking elongation, do (wetting) attitude net disrumpent feelings brute force of sheet warp-wise and breaking elongation, do (wetting) attitude net disrumpent feelings brute force of sheet broadwise and breaking elongation, do (wetting) attitude warp-wise knitmesh disrumpent feelings strength efficiency of monofilament, do the arithmetic mean of (wetting) attitude broadwise knitmesh with the disrumpent feelings strength efficiency correspondence of monofilament.This method can utilize irregularity, the coefficient of variation that the degree of irregularity and the total quality of net flake products index are passed judgment on.
The warp-wise knitmesh disrumpent feelings strength efficiency η of monofilament
1(%) by formula calculate (1):
In the formula:
η
1---the warp-wise knitmesh disrumpent feelings strength efficiency of monofilament (%);
F
1---the disrumpent feelings brute force of net sheet warp-wise (N);
F
T1---the disrumpent feelings brute force of warp monofilament (N);
n
1---the total radical of monofilament of powerful specimen width direction that net sheet warp-wise is disrumpent feelings.
The broadwise knitmesh disrumpent feelings strength efficiency η of monofilament
2(%) by formula calculate (2):
In the formula:
η
2---the broadwise knitmesh disrumpent feelings strength efficiency of monofilament (%);
F
2---the disrumpent feelings brute force of net sheet broadwise (N);
F
T2---the disrumpent feelings brute force of fill monofilaments (N);
n
2---the total radical of monofilament of powerful specimen width direction that net sheet broadwise is disrumpent feelings.
Irregularity, the coefficient of variation by formula (3), (4) are calculated:
In the formula:
C---irregularity;
X---tested performance index arithmetical mean (getting three decimals);
The average (getting three decimals) that y---tested performance index arithmetical mean is following;
N---sample number;
n
3---the sample number that tested performance index arithmetical mean is following.
In the formula: CV---the coefficient of variation;
S---standard deviation (getting three decimals);
The mean value of x---measured value (getting three decimals).
Claims (2)
1. culture and fish for polyethylene inserting performance measurement method, technical scheme of the present invention comprises the sampling and the sample cutting of net sheet sample, sample damping balance and performance measurement, it is characterized in that sample each position more than distance net sheet edge 10cm obtains, the time do not allow the direction serial sampling that is stretched at sample carrying out the same project test, but when cutting dry state and hygrometric state sample simultaneously, must cut two samples continuously in the direction that sample is stretched at every turn, cut the long otch of 1.2m along inserting warp or weft direction, remove the limit yarn and obtain 40 above length and be at least 1.0m long warp or broadwise knitmesh monofilament, obtain through or the fill monofilaments line density, disrumpent feelings brute force and breaking elongation test sample; Cut the long otch of 0.50m along inserting warp or weft direction, removing the limit yarn, to obtain 20 above effective dimensions be the disrumpent feelings brute force of 0.38m length * 0.50m wide screen sheet and breaking elongation test sample, the monofilament radical n of warp direction stretching sample, broadwise tensile sample Width
1, n
2Numerically equal respectively through close be that root/0.05m, filling density are root/0.05m; Along inserting through or weft direction cut out the square net sheet of polylith 0.11m, cutting off the limit silk, to obtain 20 effective dimensions be that the wide warp of 0.10m length * 0.10m or broadwise net sheet mass area ratio are tested and used sample; Sample otch when shearing should be positioned at the centre of adjacent two warps or parallel; The dry state sample soaks 24h at least in the 24h of damping balance at least under the atmospheric conditions of temperature (20 ± 2) ℃, humidity (65 ± 2) %, the hygrometric state sample container in water temperature (20 ± 2) ℃; When netting length is measured the net sheet is positioned on smooth, the dry place, shakeouts and make the net sheet fully to stretch, from an end of net sheet, the order continuous coverage is till the other end of net sheet, and the straight-line dimension that it constituted is netting length; Flat mouth anchor clamps before measuring, warp or the disrumpent feelings brute force of fill monofilaments and breaking elongation are installed on strength tester, the length of sample is 0.50m between anchor clamps, apply suitable pre-tension, the pre-tension value of dry state sample equals the deadweight of identical rugosity polyethylene monofilament 250m length when disrumpent feelings brute force of monofilament and breaking elongation test, the pre-tension of hygrometric state sample equals the deadweight of identical rugosity 125m polyethylene monofilament length, then the draw speed of sample with 5mm/s stretched until single wire fracture, the filament properties index of sample writes down from the pen recorder of testing machine and calculates; Before the disrumpent feelings brute force of net sheet and breaking elongation are measured, be flat mouth anchor clamps more than the 0.08m in that width is installed on the strength tester, distance between anchor clamps is adjusted into 0.20m, one end of specimen width direction is all entirely sandwiched anchor clamps, at the other end of specimen width direction specific pre-tension in addition, the pre-tension value of dry state sample equals identical rugosity polyethylene monofilament 250n respectively during net sheet warp-wise or broadwise are disrumpent feelings powerful mensuration
1, 250n
2The deadweight of Mi Changdu, the pre-tension of hygrometric state sample equals identical rugosity 125n
1, 125n
2Sandwich down flat mouthful anchor clamps after the deadweight of rice polyethylene monofilament length, under average rupture time (20 ± 2) s of regulation sample is stretched until fracture, the disrumpent feelings brute force of sample and breaking elongation index write down from the pen recorder of testing machine and calculate; With 20 effective dimensions is that wide warp of 0.10m length * 0.10m or broadwise net sheet sample are put into weighing on the balance respectively, calculates the arithmetic mean of 20 sample masses after the reading numerical values
, then 100
Be through or broadwise net sheet mass area ratio; Above-mentioned test is effectively measured time number average and is no less than 20 times, and calculates corresponding arithmetic mean.
2. breed according to claim 1 with fish for polyethylene inserting performance measurement method, it is characterized in that for the hygrometric state sample is soaked into fully, in water, add and be no more than 0.05% nonionic intermediate wet agent.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2007100453548A CN101377484B (en) | 2007-08-29 | 2007-08-29 | Method for measuring polyethylene inserting and twisting net sheet performance for cultivation and dragnet |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2007100453548A CN101377484B (en) | 2007-08-29 | 2007-08-29 | Method for measuring polyethylene inserting and twisting net sheet performance for cultivation and dragnet |
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| Publication Number | Publication Date |
|---|---|
| CN101377484A CN101377484A (en) | 2009-03-04 |
| CN101377484B true CN101377484B (en) | 2011-11-16 |
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ID=40421129
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|---|---|---|---|
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Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE2447624A1 (en) * | 1974-10-05 | 1976-04-15 | Gaddum Kg | MATERIAL TESTING SYSTEM FOR ELASTOMERS AND OTHER MATERIALS |
| CN1837773A (en) * | 2005-03-22 | 2006-09-27 | 中国水产科学研究院东海水产研究所 | Method for testing breaking strength of mesh joints in lay type net patch |
| CN1854712A (en) * | 2005-04-21 | 2006-11-01 | 中国水产科学研究院东海水产研究所 | Twisted netted piece single-wire strong testing method |
| CN101358913A (en) * | 2007-07-30 | 2009-02-04 | 中国水产科学研究院东海水产研究所 | Method for measuring physical properties of polyethylene plain net for fishing |
| CN1869638B (en) * | 2006-06-09 | 2010-05-12 | 周建青 | Electronic fabric strength testing instrument |
-
2007
- 2007-08-29 CN CN2007100453548A patent/CN101377484B/en not_active Expired - Fee Related
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE2447624A1 (en) * | 1974-10-05 | 1976-04-15 | Gaddum Kg | MATERIAL TESTING SYSTEM FOR ELASTOMERS AND OTHER MATERIALS |
| CN1837773A (en) * | 2005-03-22 | 2006-09-27 | 中国水产科学研究院东海水产研究所 | Method for testing breaking strength of mesh joints in lay type net patch |
| CN1854712A (en) * | 2005-04-21 | 2006-11-01 | 中国水产科学研究院东海水产研究所 | Twisted netted piece single-wire strong testing method |
| CN1869638B (en) * | 2006-06-09 | 2010-05-12 | 周建青 | Electronic fabric strength testing instrument |
| CN101358913A (en) * | 2007-07-30 | 2009-02-04 | 中国水产科学研究院东海水产研究所 | Method for measuring physical properties of polyethylene plain net for fishing |
Non-Patent Citations (1)
| Title |
|---|
| 石建高等.渔用自增强聚乙烯单丝的拉伸力学性能分析.《上海水产大学学报》.2004,第13卷(第4期),323-327. * |
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|---|---|
| CN101377484A (en) | 2009-03-04 |
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