CN102818533B - Methods for detecting section shape and radial profile degree of cellulose acetate fibers - Google Patents
Methods for detecting section shape and radial profile degree of cellulose acetate fibers Download PDFInfo
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- CN102818533B CN102818533B CN201210263782.9A CN201210263782A CN102818533B CN 102818533 B CN102818533 B CN 102818533B CN 201210263782 A CN201210263782 A CN 201210263782A CN 102818533 B CN102818533 B CN 102818533B
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- 239000000835 fiber Substances 0.000 title claims abstract description 55
- 238000000034 method Methods 0.000 title abstract description 25
- 229920002301 cellulose acetate Polymers 0.000 title abstract 2
- 238000001514 detection method Methods 0.000 claims abstract description 34
- 238000012360 testing method Methods 0.000 claims abstract description 23
- 238000003825 pressing Methods 0.000 claims abstract description 13
- 239000011159 matrix material Substances 0.000 claims description 13
- 238000005070 sampling Methods 0.000 claims description 9
- 210000000689 upper leg Anatomy 0.000 claims description 7
- 229920006221 acetate fiber Polymers 0.000 claims description 4
- 238000005520 cutting process Methods 0.000 claims description 4
- 230000015572 biosynthetic process Effects 0.000 claims description 3
- 239000002390 adhesive tape Substances 0.000 claims description 2
- 230000003252 repetitive effect Effects 0.000 claims description 2
- 230000000717 retained effect Effects 0.000 claims description 2
- 239000000758 substrate Substances 0.000 claims description 2
- 238000009417 prefabrication Methods 0.000 abstract 3
- 230000006835 compression Effects 0.000 abstract 1
- 238000007906 compression Methods 0.000 abstract 1
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- 230000000007 visual effect Effects 0.000 description 6
- 241000208125 Nicotiana Species 0.000 description 5
- 235000002637 Nicotiana tabacum Nutrition 0.000 description 5
- 238000009987 spinning Methods 0.000 description 5
- CTQNGGLPUBDAKN-UHFFFAOYSA-N O-Xylene Chemical compound CC1=CC=CC=C1C CTQNGGLPUBDAKN-UHFFFAOYSA-N 0.000 description 4
- 238000005516 engineering process Methods 0.000 description 4
- 238000007689 inspection Methods 0.000 description 3
- 238000010998 test method Methods 0.000 description 3
- 230000002159 abnormal effect Effects 0.000 description 2
- 239000003153 chemical reaction reagent Substances 0.000 description 2
- 235000019504 cigarettes Nutrition 0.000 description 2
- 238000002474 experimental method Methods 0.000 description 2
- 238000007380 fibre production Methods 0.000 description 2
- 239000003292 glue Substances 0.000 description 2
- 238000005304 joining Methods 0.000 description 2
- 238000004519 manufacturing process Methods 0.000 description 2
- 230000003287 optical effect Effects 0.000 description 2
- 239000012188 paraffin wax Substances 0.000 description 2
- 238000002360 preparation method Methods 0.000 description 2
- 238000004886 process control Methods 0.000 description 2
- QTBSBXVTEAMEQO-UHFFFAOYSA-M Acetate Chemical compound CC([O-])=O QTBSBXVTEAMEQO-UHFFFAOYSA-M 0.000 description 1
- 241001269238 Data Species 0.000 description 1
- LFQSCWFLJHTTHZ-UHFFFAOYSA-N Ethanol Chemical compound CCO LFQSCWFLJHTTHZ-UHFFFAOYSA-N 0.000 description 1
- 230000003321 amplification Effects 0.000 description 1
- 238000013459 approach Methods 0.000 description 1
- 238000003556 assay Methods 0.000 description 1
- 238000001816 cooling Methods 0.000 description 1
- 230000007812 deficiency Effects 0.000 description 1
- 229920006239 diacetate fiber Polymers 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 230000002708 enhancing effect Effects 0.000 description 1
- 230000000873 masking effect Effects 0.000 description 1
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- 238000003199 nucleic acid amplification method Methods 0.000 description 1
- 238000011002 quantification Methods 0.000 description 1
- 238000013139 quantization Methods 0.000 description 1
- 238000007493 shaping process Methods 0.000 description 1
- 239000000126 substance Substances 0.000 description 1
Landscapes
- Treatment Of Fiber Materials (AREA)
- Investigating Strength Of Materials By Application Of Mechanical Stress (AREA)
Abstract
The invention discloses methods for detecting a section shape and a radial profile degree of cellulose acetate fibers. The methods comprise two steps of sample prefabrication and sample detection; fiber bundle prefabrication of a sample is completed by a sampler; the sampler is composed of a base body, a thread pressing plate, a front positioning check block and a back positioning check block; several thread fixing grooves and ribbon fixing grooves are formed on the base body of the sampler; the base body of the sampler is connected with the thread pressing plate by a compression bolt; the front positioning check block and the back positioning check block are respectively arranged on two sides of a tail end of the base body of the sampler; a prefabricated sample can be obtained by a sampler for the fiber bundle prefabrication; a cross section of the prefabricated sample can be detected by a laser scanning microscope; a circumcircle radius and an incircle radius of a fiber cross section can be measured, and then a measurement result of the radial profile degree of each fiber can be obtained, thus, radial profile degree detection of a single fiber bundle can be achieved. The methods achieve automatic and quick detection of radial profile degrees of the whole thread and the whole bundle. The sample is prefabricated and detected in 2 hours; an operation is simple and testing accuracy is high.
Description
Technical field
The present invention relates to fiber detection technique field, specifically a kind of acetate fiber cross sectional shape and the radially detection method of degree of profile.
Background technology
Cross sectional shape is the basic parameter that characterizes fiber quality characteristic, and radially degree of profile is the quantization parameter of describing profiled fibre cross-section differences in shape characteristic.Along with the continuous enhancing that country requires Tar, tobacco enterprise improves constantly with strainability and the stability requirement thereof of filter tip cigarette, the quantification of pipe tobacco cross sectional shape is detected to demand and day by day strengthen.The size of the cross section special-shaped degree of tow is directly related with the strainability of the productive rate of tow, filter stick for cigarettes, therefore, " mensuration of YC/T169 pipe tobacco physicochemical property " method standard of tobacco business revision issuing and implementation in 2009 has been set up " tow is degree of profile radially " index first, and has released " cross sectional shape and radially degree of profile " assay method standard YC/T169.6-2009 that applying biological microscope carries out.But because the method length consuming time, efficiency are low, require very high to tester's technical ability, be difficult to be used widely, even the professional production enterprise of pipe tobacco, owing to being subject to the serious restriction of testing efficiency, fail to realize that degree of profile test result is directly used in to the productive rate regulation and control of instructing in production run always.
The deficiency that YC/T169.6-2009 " cross sectional shape and radially degree of profile " method of testing exists:
The prefabricated length consuming time of sample, exceedes 6 hours.
Paraffin wax masking: from paraffin wax heat fusing, be cast to mould, treat nature cooling curing, need a few hours.In order to ensure completion of cure, conventionally need put and within second day, carry out again next step;
Cured film section is pasted: after the cured film cutting being bonded on microslide with glue, must waiting glue to parch and just can enter next step order, at least need 30 minutes;
Reagent soaks and washes away cured film on microslide: first soak twice with dimethylbenzene, then use soaked in absolute ethyl alcohol twice, wait for natural dryingly, need 1 hour.
Detect length consuming time, efficiency is low, at least 20 minutes consuming time of one group of detection that comprises 30 fiber datas.After the method completes under the microscope and takes pictures, by computerized image test macro, by cutting radius of circle, circumradius each 30 times in the artificial cross section that clicks fiber in photo by root.YC/T169.6-2009 method regulation, 1 test needs three groups of tests, 1 hour consuming time.
The prefabricated technical ability to tester of sample requires high.Particularly use microtome that cured fiber film is cut into 10 these procedures of micron thick thin slice, each step misoperation may cause test failure.
The chemical reagent dimethylbenzene using in process belongs to the inflammable dangerous material of high-flash.
Totally 90 of the detectable tow radicals of each test, the representativeness of test result is restricted.The method specifies that each test comprises three groups of detections altogether, 30 every group, amounts to 90, and the monofilament that the thread of a spinning head ejection comprises reaches 250-350 root, article one, the monofilament that tow band comprises exceedes 10,000, can not carry out full inspection, and this method of testing has a lot of limitation.
The conventional optical observation fibre section shape detecting method using at present, can only be used for the sampling observation of fiber shape, can not detect whole fibre sections of product, and detect inefficient, can not meet by detection fibers cross section, instruct actual condition, go to eliminate abnormal fibre section shape.Therefore, find a detection method, all fibres shape to tow products detects, and eliminate abnormal fiber shape, control the shaping of tow in path from face comprehensively, to reach, to ensure the consistance of fibre section in product, from eliminating in essence monofilament shape difference procedure of fibre production, control consistance and the stability of fibre section shape.
Summary of the invention
The object of the present invention is to provide a kind of acetate silk cross sectional shape and method of degree of profile radially of fast, accurately detecting.
The present invention develops one tow cross-sectional sampling device fast, meets to reach the detection demand of controlling actual condition, improves the sample preparation speed of fibre section.Tow cross-sectional sampling device coordinates a kind of brand-new fibre section shape detecting method, with laser scanning microscope detection tow cross section, replaces the conventional optical observation of the poor efficiency fibre section shape detecting method using at present.The whole single thread of fast detecting (hundreds of monofilament in a spinning head), radially degree of profile of whole rhizoid band (up to ten thousand monofilament) tow continuously, efficiently solve existing tow cross sectional shape and radially degree of profile method of testing exist efficiency low with the representational problem of data.
The present invention is achieved in that the present invention forms with sample detection two parts by sample is prefabricated.The tow of sample is prefabricated to be completed by sampler, the formation of sampler is: be made up of sampler matrix, thread pressing plate, prelocalization block and rear position block, sampler substrates has some thread pickup grooves, with silk ribbon pickup groove, sampler matrix is connected by hold-down bolt with thread pressing plate, and prelocalization block and rear position block are respectively in the both sides of sampler matrix tail end.
Set thread pickup groove shape and size according to the sectional area of number of fiber, fluting is shaped as square or is rectangle, for clamping the fiber that size is small and quality is softer, make fiber upright, tow cross-sectional sampling device is for the transversal section of easy incision fiber, to observe and detect on laser scanning microscope.
Use the wide visual field of low range object lens, determine sensing range and detection position; Use the narrow visual field of high magnification object lens to detect; Then use graphic joining technology, by the narrow visual field detect multiple high precision pictures that obtain carry out continuously " seamless " splicing become a pictures, realize whole detections of every fibre section in thread.
Good effect of the present invention is as follows:
1. significantly shorten sample prefabricated consuming time: the prefabricated time of sample, from more than 6 hours, foreshortens in 30 minutes;
2. significantly shorten test consuming time: 90 monofilament of 1 experiment test of former manual method, 1 hour consuming time (be mainly that sample making is consuming time long, and have the possibility of sample preparation failure); New 1 experiment of automatic test approach can be tested all fibres in multiple thread pickup grooves, approximately 30 minutes consuming time of the detection in each thread pickup groove.
3. easy and simple to handle.The method, is sampled and not goodly can again be made rapidly sample without special technical ability requirement tester;
4. the method does not relate to the use of chemicals;
5. sampling observation becomes full inspection, and the method has thoroughly solved the problem typical that is limited to the testing result that test radical causes by the mode of the full inspection of fast automatic scanning;
6. directiveness is strong.Because the method has realized the fibre section shape of whole spinning head, whole rhizoid band and degree of profile fast detecting radially, a kind of reliable testing scheme is provided, and brand-new monitoring technology means are introduced in the control that can be the core index " productive rate " in diacetate fiber production run.From sample, prefabricated to complete overall process to detection consuming time short, simple to operate, can accurately find the spinning head going wrong, and changed, and can be directly used in the process control of instructing tow to produce.
Method of the present invention has realized radially automatically quick and precisely detecting of degree of profile of whole rhizoid thigh, whole rhizoid band tow.The method once completes multiple or whole spinning heads and spins all monofilament in single position, or completes the radially degree of profile detection of up to ten thousand monofilament of whole rhizoid band.Complete to detection from sample is prefabricated that overall process is consuming time is no more than 2 hours, simple to operate, test accuracy is high, can be directly used in the process control of instructing tow to produce.
Brief description of the drawings
Fig. 1 is the prefabricated structural representation by sampler of tow of the present invention.
Fig. 2 detects schematic diagram with tow is prefabricated by sampler under laser scanning microscope.
In figure, position block after 1-, 2-thread pressing plate, 3-clamping nut, 4-hold-down bolt, 5-compresses pan, 6-silk ribbon pickup groove, 7-thread pickup groove, 8-sampler matrix, 9-prelocalization block, 10-laser scanning microscope, 11-objective lens, 12-tow cross-sectional sampling device.
Embodiment
As shown in Figure 1, the prefabricated formation by sampler of tow of sample of the present invention is: be made up of sampler matrix 8, thread pressing plate 2, prelocalization block 9 and rear position block 1, sampler matrix 8 has some thread pickup grooves 7 above, with silk ribbon pickup groove 6, sampler matrix 8 is connected by hold-down bolt 4 with thread pressing plate 2, and prelocalization block 9 and rear position block 1 are respectively in the both sides of sampler matrix 8 tail ends.According to single fiber line density and single-stranded fiber line density, the square-section of setting thread pickup groove in sampler is long-pending, sets the number of thread pickup groove according to required detection thread number.
Set the size of thread pickup groove 7 according to the sectional area of number of fiber, fluting is shaped as square or is rectangle, for clamping the fiber that size is small and quality is softer, make fiber upright, tow cross-sectional sampling device is for the transversal section of easy incision fiber, to observe and detect on laser scanning microscope.
This detection method has adopted laser scanning microscope to detect tow cross sectional shape (as shown in Figure 2).Use the wide visual field of low range object lens, determine sensing range and detection position; Use the narrow visual field of high magnification object lens to detect; Then use graphic joining technology, by the narrow visual field detect multiple high precision pictures that obtain carry out continuously " seamless " splicing become a pictures, realize whole detections of every fibre section in thread.
Sample prefabricated: the thread sample of preparing required detection, first at the side of sampler sticking two-faced adhesive tape band, open sampler thread pressing plate 2, thread is embedded to thread pickup groove 7(sub-thread instrument connection) or silk ribbon pickup groove 6(silk ribbon instrument connection) after, by stretching thread sample, put into thread pickup groove, gently draw embedding steady downwards; And the two ends of thread are sticked on double sticky tape, tentatively fix; Repetitive operation is put into thread pickup groove by all threads to be checked successively; Use clamping nut 3 and hold-down bolt 4 that the fiber in thread pressing plate 2, thread pickup groove 7 is compressed, ensure to fix non-loosening in silk fiber is in thread pickup groove; Finally using slicing blade to cut off thread along sampler matrix 8 surfaces, be retained in the fibre cutting end face in pickup groove in sampler, is the fibre section shape that needs detection, and sample making completes, to be checked.
Sample detection: tow cross-sectional sampling device 3 is placed on the objective table of laser scanning microscope, and test lead, towards upper, uses low rate times objective lens 11 to find first and last rhizoid thigh, sets total radical, the actual sensing range of given every rhizoid thigh; Then use high power objective to detect, produce high-precision local picture, the monofilament testing result of the every fibre section shape that what figure in local picture was corresponding is exists in this region, detection system is automatically carried out splicing continuously to local picture and is become a pictures, and in this picture, energy " seamless " splices the cross sectional shape of every fiber of whole rhizoid thigh; Artificial amplification consulted this picture, and the cross sectional shape of observable fiber has or not extremely.In detection system, from picture, extract each sectional view profile, measure circumradius and the inradius of fibre section, can obtain the radially degree of profile test result of every fiber, the radially degree of profile of realizing sub-thread tow detects.
Claims (2)
1. acetate fiber cross sectional shape and radially a detection method for degree of profile, is characterized in that and sample detection two parts prefabricated by sample form:
1) tow of sample is prefabricated completes by sampler, the formation of sampler is: be made up of sampler matrix, thread pressing plate, prelocalization block and rear position block, sampler substrates has some thread pickup grooves, silk ribbon pickup groove, sampler matrix is connected by hold-down bolt with thread pressing plate, and prelocalization block and rear position block are respectively in the both sides of sampler matrix tail end;
2) sample is prefabricated: prepare the thread sample of required detection, first at the side of sampler sticking two-faced adhesive tape band, open sampler thread pressing plate, thread is embedded after thread pickup groove or silk ribbon pickup groove, by stretching thread sample, put into thread pickup groove, gently draw embedding steady downwards; And the two ends of thread are sticked on double sticky tape, tentatively fix; Repetitive operation is put into thread pickup groove by all threads to be checked successively; Pass through thread pressing plate with clamping nut and hold-down bolt the fiber in thread pickup groove is compressed, ensure to fix non-loosening in silk fiber is in thread pickup groove; Finally using slicing blade to cut off thread along sampler matrix surface, be retained in the fibre cutting end face in pickup groove in sampler, is the fibre section shape that needs detection, and sample making completes, to be checked;
3) detect tow cross section with laser scanning microscope, tow cross-sectional sampling device is placed on the objective table of laser scanning microscope, test lead is towards upper, by low rate times objective lens, find first and last rhizoid thigh, set total radical, the actual sensing range of given every rhizoid thigh; Then use high power objective to detect, produce high-precision local picture, the monofilament testing result of the every fibre section shape that what figure in local picture was corresponding is exists in this region, detection system is automatically carried out splicing continuously to local picture and is become a pictures, and in this picture, energy " seamless " splices the cross sectional shape of every fiber of whole rhizoid thigh; Amplify and consult this picture, the cross sectional shape of observable fiber has or not extremely; From picture, extract each sectional view profile, measure circumradius and the inradius of fibre section, can obtain the radially degree of profile test result of every fiber, the radially degree of profile of realizing sub-thread tow detects.
2. acetate fiber cross sectional shape according to claim 1 and the radially detection method of degree of profile, it is characterized in that described tow prefabricated with sampler thread pickup groove be square or rectangle.
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| CN109186768A (en) * | 2018-07-30 | 2019-01-11 | 南通大学 | The sample container detected automatically for micro fiber, yarn, fabric color |
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