CN109459525B - Device for improving flame retardant property test accuracy of flame retardant yarns - Google Patents
Device for improving flame retardant property test accuracy of flame retardant yarns Download PDFInfo
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- CN109459525B CN109459525B CN201811613374.5A CN201811613374A CN109459525B CN 109459525 B CN109459525 B CN 109459525B CN 201811613374 A CN201811613374 A CN 201811613374A CN 109459525 B CN109459525 B CN 109459525B
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- RNFJDJUURJAICM-UHFFFAOYSA-N 2,2,4,4,6,6-hexaphenoxy-1,3,5-triaza-2$l^{5},4$l^{5},6$l^{5}-triphosphacyclohexa-1,3,5-triene Chemical compound N=1P(OC=2C=CC=CC=2)(OC=2C=CC=CC=2)=NP(OC=2C=CC=CC=2)(OC=2C=CC=CC=2)=NP=1(OC=1C=CC=CC=1)OC1=CC=CC=C1 RNFJDJUURJAICM-UHFFFAOYSA-N 0.000 title claims abstract description 52
- 239000003063 flame retardant Substances 0.000 title claims abstract description 52
- 238000012360 testing method Methods 0.000 title claims abstract description 38
- 238000010438 heat treatment Methods 0.000 claims abstract description 64
- 238000000034 method Methods 0.000 claims abstract description 26
- 235000019504 cigarettes Nutrition 0.000 claims description 21
- 238000002485 combustion reaction Methods 0.000 claims description 16
- 230000007246 mechanism Effects 0.000 claims description 10
- 238000005485 electric heating Methods 0.000 claims description 3
- 230000001939 inductive effect Effects 0.000 claims description 3
- 238000007789 sealing Methods 0.000 claims description 3
- 230000008569 process Effects 0.000 abstract description 10
- 238000005259 measurement Methods 0.000 abstract description 5
- 230000017525 heat dissipation Effects 0.000 abstract description 3
- 230000000694 effects Effects 0.000 description 6
- 230000001105 regulatory effect Effects 0.000 description 6
- 239000000463 material Substances 0.000 description 5
- 238000009472 formulation Methods 0.000 description 4
- 239000000203 mixture Substances 0.000 description 4
- 229920002978 Vinylon Polymers 0.000 description 3
- 239000004760 aramid Substances 0.000 description 3
- 229920003235 aromatic polyamide Polymers 0.000 description 3
- 238000013461 design Methods 0.000 description 3
- 239000004744 fabric Substances 0.000 description 3
- 238000009987 spinning Methods 0.000 description 3
- 238000010521 absorption reaction Methods 0.000 description 2
- 230000009471 action Effects 0.000 description 2
- 230000008859 change Effects 0.000 description 2
- 238000002474 experimental method Methods 0.000 description 2
- 238000012986 modification Methods 0.000 description 2
- 230000004048 modification Effects 0.000 description 2
- 239000002994 raw material Substances 0.000 description 2
- 238000004804 winding Methods 0.000 description 2
- 241001474374 Blennius Species 0.000 description 1
- 241000233855 Orchidaceae Species 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 230000033228 biological regulation Effects 0.000 description 1
- 230000000903 blocking effect Effects 0.000 description 1
- 238000007664 blowing Methods 0.000 description 1
- 230000036760 body temperature Effects 0.000 description 1
- 238000012512 characterization method Methods 0.000 description 1
- 238000009841 combustion method Methods 0.000 description 1
- 230000000052 comparative effect Effects 0.000 description 1
- 230000001276 controlling effect Effects 0.000 description 1
- 238000011161 development Methods 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 239000000446 fuel Substances 0.000 description 1
- 238000009413 insulation Methods 0.000 description 1
- 230000003993 interaction Effects 0.000 description 1
- 238000002955 isolation Methods 0.000 description 1
- 210000001503 joint Anatomy 0.000 description 1
- 238000002156 mixing Methods 0.000 description 1
- 238000005192 partition Methods 0.000 description 1
- 230000000750 progressive effect Effects 0.000 description 1
- 230000000087 stabilizing effect Effects 0.000 description 1
- 238000006467 substitution reaction Methods 0.000 description 1
- 239000013589 supplement Substances 0.000 description 1
- 238000010998 test method Methods 0.000 description 1
- 238000012546 transfer Methods 0.000 description 1
- 238000009423 ventilation Methods 0.000 description 1
Classifications
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N31/00—Investigating or analysing non-biological materials by the use of the chemical methods specified in the subgroup; Apparatus specially adapted for such methods
- G01N31/12—Investigating or analysing non-biological materials by the use of the chemical methods specified in the subgroup; Apparatus specially adapted for such methods using combustion
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- Investigating Or Analyzing Materials Using Thermal Means (AREA)
Abstract
The application provides a device and a method for improving the testing accuracy of the flame retardant performance of flame retardant yarns, wherein the device comprises a heating body which is arranged in a manner of being abutted with the flame retardant yarns and provides heat required by testing; the combustion-supporting airflow is used for providing stable atmosphere for the operation of the heating element. On the premise of greatly reducing the operation difficulty, the reproducibility of the whole process is improved, and the fine position relationship between the fine adjustment yarn and the heating element in the measurement process can be avoided by adopting direct abutting; the combustion-supporting airflow is adopted, so that the heat diffusivity of a non-contact area is improved, the influence of a heating body on yarns is enhanced, and the disturbance of air above the heating body is improved while the heat dissipation function is achieved, so that the measuring efficiency and the condition consistency are improved.
Description
Technical Field
The application relates to the field of flame-retardant yarns, in particular to a device for improving flame-retardant performance testing accuracy of flame-retardant yarns.
Background
The flame-retardant yarn is a raw material for preparing flame-retardant fabric, and the flame-retardant fabric is a special fabric capable of delaying flame combustion. The occurrence of fuel blocking is mainly aimed at solving the problem that in some workplaces, open fire or high temperature can be contacted, and in such environments, the common work clothes can burn, which can have great influence on operators and workplaces, and even endanger the lives of the operators and the safety of the workplaces.
With the development of flame-retardant yarn technology, finer characterization modes are required to be adopted for the flame retardance of the yarn so as to distinguish the advantages and disadvantages of the flame retardance of the yarn under the conditions of different materials, multiple raw material combination formulas and different spinning forms. Thereby guiding the design of the formula and the design of the spinning form. For example, blending and core-spun have little effect on the final flame retardant effect, and the combustion method with the strongest intensity of vertical combustion commonly used at present may not distinguish the relatively weak change, and the difference of different formulas and structures under the condition that the flame retardant performance is not particularly good is more difficult to distinguish, so a test method capable of distinguishing the yarn flame retardant performance fine change is needed.
CN101464452a provides a method and apparatus for testing flame retardant property of yarn, the apparatus includes a combustion test box, a sample clamp is arranged in the combustion test box along 45 ° direction of the included angle with the bottom plate of the combustion test box, an igniter is arranged between the sample clamp and the bottom plate, a hollow part is arranged in the middle of the sample clamp, a supporting block is arranged on the upper side of the hollow part, a yarn holder is arranged in the middle of the supporting block, and a tension device is also arranged in the combustion test box. The testing method comprises the steps of clamping a yarn bundle to be tested connected with a tension device by a yarn clamp, clamping a sample clamped with the yarn bundle to be tested in a combustion test box, controlling an igniter to ignite the yarn bundle to be tested by a timing device, measuring the continuous combustion time and smoldering time, and directly measuring the damage length under the clamping state of the yarn bundle to be tested. The invention directly tests the flame retardance of the yarn, has better correlation with other testing methods, and is simple, feasible, quick and accurate, widely applied and low in cost. This method requires fine adjustment of the positional relationship between the heating member and the yarn, and is difficult to handle in practical operation.
Disclosure of Invention
In order to solve the technical problems, the application provides a device for improving the testing accuracy of the flame retardant performance of a flame retardant yarn, and on one hand, a heating body is provided and is used for being abutted with the flame retardant yarn and providing heat required by testing; the combustion-supporting airflow is used for providing stable atmosphere for the operation of the heating element. The performance of the measuring device is improved from three aspects by adopting direct abutting and auxiliary setting of combustion-supporting airflow, 1, the reproducibility of the whole process is improved, and the fine position relation between the fine adjustment yarn and the heating element in the measuring process can be avoided by adopting direct abutting; 2. the combustion-supporting airflow is adopted, so that the heat diffusivity of the non-contact area is improved, and the influence of the heating element on the yarns is enhanced; 3. the combustion-supporting airflow is adopted to play a role in heat dissipation, and meanwhile, the disturbance of air above the combustion-supporting airflow can be improved, so that the measuring efficiency and the condition consistency are improved. In addition, if a combustible heating element is adopted, the direction of the flow can be from the head to the tail of the cigarette of the heating element. The heating element is generally arranged perpendicular to the yarn or at a certain angle, and the test comparison effect is not affected under the same angle arrangement.
Preferably, the yarn feeding device further comprises a receiving plate for receiving the yarns, and a gap is arranged between the receiving plate and the yarns. The result that the yarn is not inflammable and broken due to heat absorption of the bearing plate and isolation of the bearing plate to air is avoided, and consistency in the whole testing process is improved. In this case, it is necessary to ensure that the gap has a uniform height as much as possible. The specific mode can adopt a mode of arranging a partition plate on the bearing plate at intervals and the like to carry out clearance arrangement. The heating element is not influenced by the heat absorption effect generated by the contact of the yarn bearing plate, so that the heating and heat transfer process of the heating element is more stable. The clearance can be obtained by the following method: two protruding yarn supporting bars are arranged on the bearing plate, and under the normal condition, the thickness of the supporting bars is 8mm, the width is 10mm and the interval is 50mm. The intensity of the burning of the cigarette head of the fuming burning cigarette is not influenced by the endothermic effect generated by the contact of the yarn bearing plates, so that the intensity of the burning of the cigarette head of the fuming burning cigarette is more stable.
Preferably, the combustion-supporting air flow is arranged at the upper part or the lower part of the heating body, and the flow direction of the combustion-supporting air flow is basically parallel to the arrangement direction of the heating body. The combustion-supporting airflow is prevented from disturbing the whole measuring atmosphere, and the measuring repeatability is improved.
Preferably, the heating element is disposed above or below the yarn. The whole structure is simplified, under the condition, the heating element can be directly arranged on the yarn without adopting any supporting structure, the purpose of directly abutting the heating element with the yarn is realized by directly arranging the heating element, and the reproducibility of the mode is strong; if the heating element is arranged above the yarn, the heating element can play a role in supporting the yarn, and the operation is very convenient.
Preferably, the heating element is a constant temperature electric heating rod or a flammable body.
Preferably, the combustible body is a cigarette or a incense, and the combustible portion of the combustible body: 51-55mm, filter portion: 29-31mm, diameter: 7.5-8.5mm, 0.9-1.1g weight, combustion rate: 6-10min/50mm. Testing of the burn rate of the combustible: the method comprises the steps of regulating humidity according to a specified rule, marking a position which is 2mm to 52mm away from a cigarette end, recording the time for burning a fuming burning cigarette for 50mm, and specifying the ventilation rate of a test environment when the burning rate of the cigarette is tested as follows: 0.02m/s-0.2m/s.
Preferably, the air inducing mechanism comprises a box body, the heating element and the bearing plate are arranged in the box body, an air outlet is communicated with the box body, the air outlet is opposite to one end of the heating element, and a fan is connected to the air outlet. Both types of fans can be adopted, one is a fan which provides a positive pressure environment in the box body and blows to the heating element; the other is a fan which provides a negative pressure environment in the box body, namely, air is discharged from the fan, and air flow is formed around the heating element due to the supplement of the air.
Preferably, the box body is also provided with an air supply port, and the air supply port is arranged opposite to the air outlet; the air supply port is provided with an adjusting mechanism, the adjusting mechanism comprises a first through hole arranged on the box body, one side of the first through hole is provided with a rotary disc movably connected with the box body, and the rotary disc is provided with a second through hole which is arranged corresponding to the first through hole; the air outlet is provided with an air speed measuring instrument; the box body is provided with a plurality of observation windows, and the observation windows are provided with transparent layers which are connected with the box body in a sealing way; an illuminating lamp is arranged in the box body. When the air supply port is provided, the case is substantially sealed, and even if the case is in an unsealed state, most of the air is taken in and out from the air supply port because the air resistance of the air supply port is much smaller. The design of the air supply port has the following two purposes: 1. a passage is formed between the air outlet and the air outlet, so that better guiding effect is generated on the combustion-supporting airflow and the direction of the combustion-supporting airflow; 2. the magnitude of the air flow is adjusted so that it is maintained in a certain measurement sequence, all external conditions being kept as consistent as possible, to measure more convincing test results.
Preferably, the method for testing the performance of the flame-retardant yarn by the device comprises the following steps: the method comprises the steps of providing at least one flame-retardant yarn to be tested and at least one heating element, and providing auxiliary air flow, wherein the auxiliary air flow is used for providing an atmosphere for stabilizing the working of the heating element, and the heating element is arranged in abutting connection with the flame-retardant yarn so as to test the tolerance degree of the flame-retardant yarn to the heating element. The tolerance degree can be examined from two aspects, namely, the number of broken yarns accounts for the percentage after a plurality of flame-retardant yarns are treated; secondly, the length of the flame-retardant yarn burnt out under the action of the heating body in fixed time.
The beneficial effects of this application are as follows:
1. on the premise of greatly reducing the operation difficulty, the reproducibility of the whole process is improved, and the fine position relationship between the fine-tuning yarn and the heating element in the measurement process can be avoided by adopting direct butt joint;
2. the combustion-supporting airflow is adopted, so that the heat diffusivity of a non-contact area is improved, the influence of a heating body on yarns is enhanced, and the disturbance of air above the heating body is improved while the heat dissipation function is achieved, and the measurement efficiency and the condition consistency are improved;
3. the specific structure is adopted to control the property of the combustion-supporting airflow so as to ensure the controllability of the overall measurement condition;
4. under the condition that the cigarette or the incense is adopted and the combustion-supporting airflow is also required, if the nature of the cigarette or the incense is consistent, the repeatability of the combustion process can basically meet the requirement on the premise that the same airflow is adopted.
Drawings
The accompanying drawings, which are included to provide a further understanding of the application and are incorporated in and constitute a part of this application, illustrate embodiments of the application and together with the description serve to explain the application and do not constitute an undue limitation to the application. In the drawings:
FIG. 1 is a schematic structural view of the present application;
fig. 2 is a schematic structural view of the case with the present application.
Fig. 3 is a schematic view of the structure of the present application in which a gap and a heat insulating plate are provided in a case.
Fig. 4 is a schematic structural diagram of the air supply port.
Detailed Description
In order to more clearly illustrate the general concepts of the present application, a detailed description is provided below by way of example in connection with the accompanying drawings.
In the following description, numerous specific details are set forth in order to provide a thorough understanding of the present application, however, the present application may be practiced otherwise than as described herein, and thus the scope of the present application is not limited by the specific embodiments disclosed below.
In addition, in the description of the present application, it should be understood that the terms "center," "upper," "lower," "front," "rear," "left," "right," "vertical," "horizontal," "top," "bottom," "inner," "outer," "axial," "radial," "circumferential," etc. indicate or refer to an azimuth or a positional relationship based on that shown in the drawings, and are merely for convenience of description and to simplify the description, and do not indicate or imply that the apparatus or element in question must have a specific azimuth, be configured and operated in a specific azimuth, and therefore should not be construed as limiting the present application.
Furthermore, the terms "first," "second," and the like, are used for descriptive purposes only and are not to be construed as indicating or implying a relative importance or implicitly indicating the number of technical features indicated. Thus, a feature defining "a first" or "a second" may explicitly or implicitly include one or more such feature. In the description of the present application, the meaning of "a plurality" is two or more, unless explicitly defined otherwise.
In this application, unless specifically stated and limited otherwise, the terms "mounted," "connected," "secured," and the like are to be construed broadly, and may be, for example, fixedly connected, detachably connected, or integrally formed; the device can be mechanically connected, electrically connected and communicated; can be directly connected or indirectly connected through an intermediate medium, and can be communicated with the inside of two elements or the interaction relationship of the two elements. The specific meaning of the terms in this application will be understood by those of ordinary skill in the art as the case may be.
In this application, unless expressly stated or limited otherwise, a first feature "up" or "down" a second feature may be the first and second features in direct contact, or the first and second features in indirect contact via an intervening medium. In the description of the present specification, a description referring to terms "one embodiment," "some embodiments," "examples," "specific examples," or "some examples," etc., means that a particular feature, structure, material, or characteristic described in connection with the embodiment or example is included in at least one embodiment or example of the present application. In this specification, schematic representations of the above terms are not necessarily directed to the same embodiment or example. Furthermore, the particular features, structures, materials, or characteristics described may be combined in any suitable manner in any one or more embodiments or examples.
In one embodiment, as shown in fig. 1, the device comprises a heating element 2 which is arranged basically perpendicular to the arrangement direction of the yarns 1, the heating element 2 is arranged in a way of abutting against the yarns 1, and the side part of the heating element 2 is provided with combustion-supporting airflow 3. When in use, firstly, a plurality of yarns 1 are arranged in parallel to the yarns 1 in a winding tensioning mode or a supporting rod stretching mode, and then the heating body 2 is placed on the yarns 1 or supported on the yarns 1 by a supporting frame, but the heating body 2 is required to be in direct contact with the yarns; as for the arrangement mode of the heating element 2 and the yarn 1, the arrangement mode is basically vertical and is not limited to the vertical arrangement mode, but the angle formed by the axis of the heating element 2 and the yarn 1 can float in a larger included angle a, the included angle a is more than or equal to 45 degrees and less than or equal to 135 degrees, then the combustion-supporting air flow 3 is provided by a fan, a negative pressure generating device or natural wind mode, the generated combustion-supporting air flow 3 can be intermodulation with the time sequence of the arrangement of the heating element 2, if the heating element 2 is an electric heating rod, the heating element 2 is heated to a certain degree, if cigarettes or incense are adopted, and after the heating element is in a smoldering state, the yarn 1 is operated and treated under the action of the combustion-supporting air flow 3.
In the above structure, the yarn feeding device may further include a receiving plate 4 for receiving the yarn 1, and a gap 12 may be provided between the receiving plate 4 and the yarn 1. So that both sides can contact with air, namely combustion-supporting air flow 3, make yarn 1 break more easily, and the size of clearance can also be regulated and controlled through comparatively convenience.
Of course, it is clear that a more optimal regulation of the combustion air flow is possible, i.e., the combustion air flow 3 is provided at the upper or lower portion of the heat generating body 2, and the flow direction of the combustion air flow 3 is substantially parallel to the arrangement direction of the heat generating body 2. The combustion-supporting air flows which are arranged in parallel can reduce disturbance to the whole measuring space and improve consistency in measuring conditions. At this time, the heating element 2 needs to be disposed in a relatively small space, and air is introduced on the premise that an air distribution plate or other means for uniformly distributing air is provided on one side, so as to generate the combustion-supporting air flow 3 disposed substantially parallel to the heating element 2.
In another embodiment, as shown in fig. 2-4, on the basis of the first embodiment, the combustion air stream 3 may be generated by adopting the following specific structure: the air-inducing device comprises an induced draft mechanism, wherein the induced draft mechanism 7 comprises a box body 5, the heating body 2 and the bearing plate 4 are arranged in the box body 5, an air outlet 6 is communicated with the box body 5, the air outlet 6 is opposite to one end of the heating body 2, and the air outlet 6 is connected with a fan 7; the box body 5 is also provided with an air supply port 8, and the air supply port 8 is arranged opposite to the air outlet 6; the air supply port 8 is provided with an adjusting mechanism, the adjusting mechanism comprises a first through hole 81 arranged on the box body 5, one side of the first through hole 81 is provided with a rotary table 82 movably connected with the box body 5, and the rotary table 82 is provided with a second through hole 83 which is correspondingly arranged with the first through hole 81; an air speed measuring instrument 84 is arranged at the air outlet 6; a plurality of observation windows 9 are arranged on the box body 5, and a transparent layer which is connected with the box body 5 in a sealing way is arranged on the observation windows 9; an illuminating lamp 10 is arranged in the box body 5; the bearing plate 4 is provided with a heat insulation layer 11; the operation is identical to that of the first embodiment, but the process of generating the combustion air flow 3 is performed as follows: the fan 7 is firstly turned on, then the wind resistance of the air supply port 8 is regulated by utilizing the rotary disk 82, the air flow is regulated by regulating the wind resistance, and the wind speed is measured by utilizing the wind speed measuring instrument 84 in the process.
In example 1 of the specific embodiment,
the method comprises the following specific steps:
yarn formulation specification
| Sequence number | Formulation of | Yarn support | Twist factor |
| 1 | 100% meta-aramid | 30 | 350 |
| 2 | Meta-aramid 50/orchid essence FR50 | 30 | 350 |
| 3 | Meta-aramid 20/blue FR 40/flame retardant vinylon 40 | 30 | 350 |
The first step: the yarns of numbers 1 to 3 and the cigarettes for experiment were left at room temperature for 72 hours, and then were subjected to humidity control in an atmosphere at a temperature of (25.+ -. 3) ℃ and a humidity of (65.+ -. 5)% for 16 hours.
And a second step of: and (3) regulating the density of the yarn of 1-3 to 13 yarns/cm by using a yarn black board rocking machine, and winding the yarn around the yarn bearing plates respectively.
And a third step of: and placing the shaken yarn bearing plate on a yarn bearing plate bracket in the experiment box.
Fourth step: the standard cigarette is lighted and smoked until the tip is in vigorous smoldering, the fuming burning cigarette is placed at the notch (central position) of the yarn bearing plate, the cigarette is placed perpendicular to the yarn, and the smoldering tip of the cigarette is at a position far away from the fan.
Fifth step: and (3) adjusting the speed of the fan and the opening degree of the air supply opening, and observing whether the flame-retardant yarn is just blown by the cigarette lighter, wherein the numerical value of the wind speed measuring instrument is the standard for testing the yarn sample.
Sixth step: and repeating the second step, the third step and the fourth step, observing the number of blown yarns after the fuming burning cigarettes are burnt (50 mm), and recording the wind speed, the number of blown yarns and the burning time. This step was repeated 2 times for each yarn and the percentage of broken roots was calculated.
Flame retardant property test results of three flame retardant yarns
In example 2 of the specific embodiment, a method for testing flame retardant properties of flame retardant yarns with the same fineness, different formulas and different spinning forms comprises the following specific steps:
yarn formulation specification
| Sequence number | Formula and structure | Yarn support | Twist factor |
| 1 | Polyareoxadiazole (60 s) Bao Fangguan (30 s) Bao Lan fine FR (15 s) | 15s | 330 |
| 2 | Flame retardant vinylon (60 s)/Bao Fangguan (30 s) Bao Lan fine FR (15 s) | 15s | 330 |
| 3 | Seaweed 50/vinylon 50 (60 s) bales F (30 s) and FR (15 s) | 15s | 330 |
The same procedure as in example 1 was repeated.
Test results of three yarns
Example 3 was performed using an electrically heated heat-generating body instead of cigarettes, the heat-generating body temperature was set to 240 ℃, and the materials in example 2 were tested:
test results of three yarns
In example 4, which is a comparative example, the materials of example 2 were tested by treating according to the technical scheme of CN101464452 a:
test results of three yarns
It can be seen that the technique used in the present application is more differentiated for yarns of similar flame retardant properties, corresponding to formulations 2 and 3 of examples 2-4, with respect to the technique provided by CN101464452a, the differences in the number of blowing are as follows:
in this specification, each embodiment is described in a progressive manner, and identical and similar parts of each embodiment are all referred to each other, and each embodiment mainly describes differences from other embodiments. In particular, for system embodiments, since they are substantially similar to method embodiments, the description is relatively simple, as relevant to see a section of the description of method embodiments.
The foregoing is merely exemplary of the present application and is not intended to limit the present application. Various modifications and changes may be made to the present application by those skilled in the art. Any modifications, equivalent substitutions, improvements, etc. which are within the spirit and principles of the present application are intended to be included within the scope of the claims of the present application.
Claims (6)
1. A device for improving the accuracy of flame retardant performance testing of flame retardant yarns, comprising:
the heating body is arranged in a manner of being abutted against the flame-retardant yarns and provides heat required by testing, the heating body is a constant-temperature electric heating rod or a flammable body, and the flammable body is cigarettes or incense;
the combustion-supporting airflow is used for providing stable atmosphere for the operation of the heating element;
the yarn feeding device further comprises a receiving plate for receiving the yarns, and a gap is arranged between the receiving plate and the yarns;
the air inducing mechanism comprises a box body, the heating element and the bearing plate are arranged in the box body, an air outlet is communicated with the box body, the air outlet is opposite to one end of the heating element, and a fan is connected to the air outlet;
the box body is also provided with an air supply port, and the air supply port is arranged opposite to the air outlet; the air supply port is provided with an adjusting mechanism, the adjusting mechanism comprises a first through hole arranged on the box body, one side of the first through hole is provided with a rotary disc movably connected with the box body, and the rotary disc is provided with a second through hole which is arranged corresponding to the first through hole; the air outlet is provided with an air speed measuring instrument.
2. The device for improving the testing accuracy of the flame retardant property of the flame retardant yarn according to claim 1, wherein the combustion-supporting air flow is arranged at the upper part or the lower part of the heating body, and the flow direction of the combustion-supporting air flow is basically parallel to the arrangement direction of the heating body.
3. The device for improving the testing accuracy of the flame retardant property of the flame retardant yarn according to claim 1, wherein the heating element is arranged above or below the yarn.
4. The apparatus for improving the accuracy of flame retardant property testing of a flame retardant yarn as claimed in claim 1, wherein the combustible part of the combustible body: 51-55mm, filter portion: 29-31mm, diameter: 7.5-8.5mm, 0.9-1.1g weight, combustion rate: 6-10min/50mm.
5. The device for improving the testing accuracy of the flame retardant property of the flame retardant yarns according to claim 1, wherein a plurality of observation windows are arranged on the box body, and a transparent layer which is connected with the box body in a sealing way is arranged on the observation windows; an illuminating lamp is arranged in the box body.
6. The device for improving the testing accuracy of the flame retardant property of the flame retardant yarn according to claim 1, wherein: the method for testing the performance of the flame-retardant yarn by the device comprises the following steps:
at least one flame retardant yarn to be tested is provided,
at least one heating element is provided, and at least one heating element is provided,
the method further includes the step of providing an auxiliary gas flow for providing a stable atmosphere in which the heat generating body operates,
the heating body is arranged in a manner of being abutted with the flame-retardant yarns so as to test the tolerance degree of the flame-retardant yarns to the heating body.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201811613374.5A CN109459525B (en) | 2018-12-27 | 2018-12-27 | Device for improving flame retardant property test accuracy of flame retardant yarns |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201811613374.5A CN109459525B (en) | 2018-12-27 | 2018-12-27 | Device for improving flame retardant property test accuracy of flame retardant yarns |
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| Publication Number | Publication Date |
|---|---|
| CN109459525A CN109459525A (en) | 2019-03-12 |
| CN109459525B true CN109459525B (en) | 2024-01-19 |
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Citations (21)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
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