CN109799125B - Preparation method of clamping sample for automatic color fastness detection test - Google Patents
Preparation method of clamping sample for automatic color fastness detection test Download PDFInfo
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- CN109799125B CN109799125B CN201910236182.5A CN201910236182A CN109799125B CN 109799125 B CN109799125 B CN 109799125B CN 201910236182 A CN201910236182 A CN 201910236182A CN 109799125 B CN109799125 B CN 109799125B
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Abstract
The invention relates to a sample preparation technology in textile color fastness detection, in particular to a preparation method of a clamping sample for an automatic color fastness detection test, which is characterized in that a combined sample is prepared according to the specification in the conventional color fastness test standard, the combined sample is flatly laid on a supporting plate, then a pressing sheet is used for pressing the combined sample on the supporting plate to prepare the clamping sample for the automatic color fastness detection, and in the color fastness test detection process, the prepared clamping sample is placed in a container in the state that the supporting plate is arranged at the lower part and the pressing sheet is arranged at the upper part, and required liquid is injected into the container to fully soak the combined sample.
Description
Technical Field
The invention relates to a sample preparation technology in textile color fastness detection, in particular to a preparation method of a clamping sample for an automatic color fastness detection test, which is characterized in that a combined sample is prepared according to the specification in the conventional color fastness test standard, the combined sample is flatly laid on a supporting plate, then a pressing sheet is used for pressing the combined sample on the supporting plate to prepare the clamping sample for the automatic color fastness detection, and in the color fastness test detection process, the prepared clamping sample is placed in a container in the state that the supporting plate is arranged at the lower part and the pressing sheet is arranged at the upper part, and required liquid is injected into the container to fully soak the combined sample.
Background
In the field of textile testing, it is often desirable to test textiles for fastness to water, sea, saliva, and perspiration, among other tests, which typically involve combining the textile (e.g., fabric or fiber) to be tested with one or two textiles of a given type (e.g., by stitching) to form a combined sample. For example, in GB/T5714-1997 color fastness to sea water in the textile color fastness test, if the sample to be tested is a fabric, the combined sample is prepared by one of the following methods:
a) a40 mm X100 mm sample to be tested is taken, the front surface of the sample is attached to a 40mm X100 mm multi-fiber attached lining fabric, and the sample is sewn along a short edge to form a combined sample.
b) A piece of the tested sample of 40mm multiplied by 100mm is clamped between two pieces of single fiber lining fabrics of 40mm multiplied by 100mm and is sewed along a short edge to form a combined sample.
If the sample to be tested is a yarn or loose fiber, the yarn or loose fiber being taken approximately half the total amount of the lining fabric, a combined sample is prepared by one of the following methods:
a) sandwiched between a 40mm x 100mm multi-fiber lapping fabric and a 40mm x 100mm dyed non-colored fabric, and stitched along four sides to form a combined sample.
b) Sandwiched between two 40mm x 100mm specified single fiber scrim and stitched along four sides to form a composite sample.
In the color fastness test process, generally, the prepared combined sample is immersed in corresponding liquid to be fully soaked, manual lifting, shifting, turning, tamping and other interventions are sometimes needed in the soaking process, the tamping mode is generally adopted in the practical operation to ensure that the combined sample is fully soaked in the liquid, then excessive liquid on the combined sample is squeezed out, the combined sample is placed between two flat plates of a test device to apply certain pressure, and some samples and lining fabrics are separated, dried and subjected to staining evaluation.
At present, the series of color fastness test detection steps basically depend on manual operation, the operation is complex, the labor amount is large, and the work content is single and repeated. At present, the combined sample prepared in the way is inconvenient for automatic detection, and if the related color fastness detection which is the same as or similar to the test detection steps needs to be automatically carried out, a method which can control the state of the combined sample at each link of the color fastness detection is needed so as to ensure that the combined sample is controlled in the whole test detection process and is easy to automatically transmit among each step in the test detection process.
In view of the above problems, the invention discloses a preparation method of a clamping sample for an automatic color fastness detection test, and compared with the prior art, the preparation method of the clamping sample for the color fastness detection test is applied to prepare the clamping sample for the color fastness detection, so that the automation of the color fastness detection is more convenient to realize.
Disclosure of Invention
To overcome the defects in the prior art, the invention provides a preparation method of a clamped sample for an automatic color fastness detection test, and the solution is as follows:
the combined sample is prepared according to the method for preparing the combined sample in the conventional color fastness test standard, and is characterized in that the prepared combined sample is clamped between a holding plate and a pressing sheet after being flattened,
the supporting plate is a flat plate with the side length larger than that of the combined sample, and can adopt a glass plate or a resin plate adopted in the existing color fastness test process, and can also adopt other flat plates;
the pressing sheet is a part for pressing the combined sample on the supporting plate, the pressing sheet is partially or completely contacted with the combined sample, and the contact part can penetrate through corresponding liquid (such as water, seawater, simulated sweat, simulated saliva and the like) for detecting the color fastness, so that the combined sample can be fully soaked, and the detection liquid can be soaked into the combined sample through the pressing sheet during soaking and tamping;
the average density of the pressed sheet is greater than that of the corresponding color fastness test liquid, so that the pressed sheet can press the combined sample in the corresponding color fastness test liquid to keep the combined sample in a straight stretched state.
During the color fastness test detection process, the prepared clamping sample is horizontally placed into a container in a state that a supporting plate is arranged below and a combined sample is arranged above the container, corresponding liquid is injected into the container to fully soak the combined sample, the combined sample cannot float or move in the liquid due to the pressing of a pressing sheet above the combined sample, even if the clamping sample is automatically pressed in the soaking process to promote the combined sample to be fully soaked, the combined sample can also keep a straight and extended state, the whole clamping sample is automatically taken out from the liquid and the pressing sheet is taken away before the moisture is squeezed out, the combined sample is fully soaked, the straight and extended state can be kept on the supporting plate even if the pressing sheet is not pressed, only the combined sample and the supporting plate below the combined sample are left, the moisture can be squeezed out later, and the supporting plate below the combined sample is supported, so that the automatic rolling and pressing can be used, And the redundant water on the combined sample is squeezed off by scraping and other modes, and the lower surface of the combined sample after the water is squeezed off is still supported by the supporting plate, so that the combined sample is automatically stacked, clamped samples of the pressing sheets are removed, pressure is applied, the combined sample is taken down from the supporting plate until the combined sample needs to be separated and aired, and airing, sorting and evaluating are carried out.
The clamping samples prepared by the combined samples can control the state of the combined samples, prevent the combined samples from being unsmooth due to curling, moving and the like in the soaking process, and facilitate the automation and informatization of the color fastness test, for example, a plurality of prepared clamping samples can be stacked to keep the ordered automatic test one by one, or enter an automatic detection system one by one on a conveying system.
Drawings
FIG. 1 is a schematic side view showing the composition of a grip specimen described in example 1, which is a method for preparing a grip specimen for an automatic color fastness test according to the present invention.
Fig. 2 is a schematic top view of a combination sample placed on a holding plate according to a method for preparing a holding sample for an automatic color fastness detection test of the present invention.
FIG. 3 is a schematic diagram of a pressed sheet made of a stainless steel plate with holes according to the method for preparing a clamped sample for an automatic color fastness detection test.
FIG. 4 is a schematic side view showing the composition of a combination sample according to a method for preparing a grip sample for an automatic color fastness test of the present invention.
FIG. 5 is a schematic side view showing the composition of a grip specimen described in example 2 of a method for preparing a grip specimen for an automatic color fastness test of the present invention.
FIG. 6 is a schematic side view showing the composition of a grip specimen described in example 3 of the method for preparing a grip specimen for an automatic color fastness test of the present invention.
FIG. 7 is a schematic top view of the composition of the screen pressing frame in the method for preparing the clamping sample for the automatic color fastness detection test of the invention.
FIG. 8 is a schematic top view of another composition of the screen frame according to the method for preparing a clamping sample for an automatic color fastness detection test of the invention.
FIG. 9 is a schematic top view of a third composition of a screen frame according to a method for preparing a clamped sample for an automatic color fastness test of the present invention.
FIG. 10 is a schematic side view showing the composition of another combination sample used in the method for preparing a grip sample for an automatic color fastness test of the present invention.
In the figure: 1. pressing sheet 11, stainless steel plate 12 with holes, net pressing frame 121, holding frame 122, net 2, combined sample 20, tested sample 21, lower attached lining fabric 22, upper attached lining fabric 3 and supporting plate
Detailed Description
Several specific examples of the method for preparing a grip specimen for an automatic color fastness test according to the present invention are given below with reference to the drawings, and these examples are only illustrative of the present invention and do not constitute a limitation to the claims of the present invention, and nothing in the present invention is described as being applicable to the prior art.
Example 1 of a method for preparing a grip specimen for use in an automatic test for color fastness according to the present invention (shown in FIGS. 1 to 4):
a combination sample 2 was prepared according to the specification of the preparation of the combination sample in the relevant color fastness test standard, the combination sample 2 prepared in this example was composed of two layers of lining fabrics (upper lining fabric 22 and lower lining fabric 21, respectively) sandwiching one layer of the fabric to be tested on top and bottom (as shown in fig. 4), the prepared combination sample 2 was spread in a flat state and laid on a holding plate 3, and a pressed sheet 1 was further pressed on top of the combination sample 2 to prepare a sandwiched-structure holding sample in which the middle layer was the combination sample 2 and both sides of the combination sample 2 were sandwiched by the holding plate 3 and the pressed sheet 1, respectively.
The support plate 3 is a resin plate having a larger side than the combination sample 2, and a glass plate, a steel plate, or the like may be used.
The pressing sheet 1 is a stainless steel plate 11 (shown in fig. 3) which is larger than the combined sample 2 in side length and is provided with a plurality of through holes, the holes on the pressing sheet are beneficial to the combined sample 2 to be fully soaked in liquid, and the detection liquid can be soaked into the combined sample through the pressing sheet during tamping.
In the color fastness test detection process, the prepared clamping sample is horizontally placed into a container with a supporting plate 3 at the lower part and a pressing sheet 1 at the upper part, and required liquid is injected into the container, so that the combined sample 2 is fully soaked, the combined sample 2 can also keep a straight and extended state because the pressing sheet 1 is arranged above the combined sample 2, the combined sample 2 cannot float or move in the liquid, even if the top surface of the pressing sheet 1 is tamped in the soaking process to promote the combined sample 2 to be fully soaked, the combined sample 2 can also keep the straight and extended state, the combined sample 2 is clamped by the supporting plate 3 and the pressing sheet 1, so that the clamping sample is automatically taken out from the liquid before the water is squeezed out, the straight and extended state of the combined sample 2 can be kept unchanged, then the pressing sheet 1 at the upper part of the pressing sheet is automatically taken away, and because the pressing sheet 1 is provided with a plurality of holes through which liquid and air can penetrate, the combined sample 2 can be attached to the supporting plate 3 and keep the extended state when the pressing sheet 1 is taken away, after the pressing sheet 1 is taken away, the clamping sample only remains the combined sample 2 and the supporting plate 3 below the combined sample 2, so that subsequent automatic squeezing out of water is facilitated, because the supporting plate 3 is arranged below the combined sample 2 for supporting, redundant water on the combined sample 2 can be squeezed out in an automatic rolling, scraping and other modes, because the supporting plate 3 is still arranged below the combined sample 2 after the water is squeezed out, automatic stacking placement is facilitated, the clamping sample of the pressing sheet is removed, pressure is applied, and sample movement control in a subsequent heat preservation process is realized, until the combined sample is required to be separated and dried, the combined sample 2 is taken down from the supporting plate 3, and drying, sorting and evaluation are carried out.
The sandwich-structured clamping sample is prepared by utilizing the combined sample 2, so that the state of the combined sample 2 is easily controlled in the color fastness test process, the automation and informatization of the color fastness test are conveniently realized, for example, a plurality of prepared clamping samples can be kept and the stacking sequence of the clamping samples can be recorded by a computer after being stacked, conditions are provided for subsequent automatic detection, and orderly detection and sorting are carried out during automatic test, or the clamping samples enter an automatic detection system for detection one by one on a conveying system.
Example 2 of a method for preparing a grip specimen for use in an automatic color fastness test of the present invention (shown in fig. 5):
this example is different from example 1 of the method for preparing a grip specimen for an automatic color fastness test in that:
the length and width of the pressing sheet 1 in embodiment 1 are equal to those of the supporting plate 3, and the supporting plate 3 is blocked in the plumb direction after the pressing sheet 1 covers the combined sample 2, which is not beneficial to automatically taking and placing the whole clamping sample, therefore, in this embodiment, the length of the pressing sheet 1 is smaller than that of the supporting plate 3, or the width of the pressing sheet 1 is smaller than that of the supporting plate 3, when the pressing sheet 1 presses the combined sample 2, a section of length at two ends of the supporting plate 3 can not be blocked by the combined sample 2 and the pressing sheet 1, which is convenient for automatically taking and placing the whole clamping sample, for example, the vacuum chuck can be used to suck two ends of the supporting plate 3 to move the whole clamping sample.
Example 3 of a method for preparing a grip specimen for use in an automatic test for color fastness of the present invention (shown in FIGS. 6 to 9):
this example is different from example 2 of the method for preparing a grip specimen for an automatic color fastness test in that:
in this embodiment, the pressing sheet 1 is a net pressing frame 12, and as shown in fig. 7, a net 122 having a small stretching ratio, being permeable to gas and liquid, having a side length larger than that of the combined sample, having a length direction smaller than that of the holding plate 3, and having a width larger than that of the holding plate 3 is tightly mounted on a rectangular frame-shaped holder 121, and when the pressing sheet 1 is pressed against the combined sample 2, the net 122 tightly mounted on the net pressing frame 12 is in contact with the combined sample 2, and the holder 121 is located at the periphery of the combined sample 2, and a region not covered by the combined sample 2 and the net pressing frame 12 is exposed at each of both ends of the holding plate 3, so that the clamped sample can be automatically transferred, for example, the region not covered by the combined sample 2 and the net pressing frame 12 at both ends of the holding plate 3 can be sucked by a vacuum chuck to lift the whole clamped sample.
The length of the side of the holder 121 in the width direction is larger than that of the holding plate 3 in the width direction, so that the holding frame 12 with the net can be automatically clamped from a clamped sample, or the holder 121 with a pressed piece made of magnetic metal can be used, so that the holding frame 12 with the net can be conveniently taken down by an electromagnet.
The average density of the meshed press frame 12 is greater than that of the corresponding color fastness testing liquid, so that the meshed press frame 12 can press the combined sample 2 in the corresponding color fastness testing liquid to keep the combined sample in a straight stretching state between the press sheet 1 and the holding plate 3.
It is needless to say that the use of the frame with screen 12 in fig. 8 and 9 is not excluded, and in fig. 8, the distance between the inner sides in the longitudinal direction of the holder 121 corresponds to the length of the holding plate 3, and the mesh 122 is shorter than the holder 121 in the longitudinal direction of the holder 121, so that a region not covered with the combination sample 2 and the frame with screen 12 is exposed at both ends in the longitudinal direction of the holding plate 3 after the frame with screen 12 is pressed against the combination sample 2, and is used for sucking and holding the sample. In fig. 9, a section of the holder 121 in the width direction is not covered by the mesh 122, and a vacuum chuck may be used to suck the holding plate corresponding to the section when sucking and holding the sample.
Even though it is not excluded that the mesh 122 with the mesh press frame 12 has a large hole in the middle, in this case, the middle of the combination sample 2 is not pressed by the mesh press frame 12 when the mesh press frame 12 presses on the combination sample 2, but the four side regions of the combination sample 2 are pressed to also play a fixing role, and the stainless steel plate 11 with holes also has a large hole in the middle to press only the periphery of the combination sample, but not the middle region of the combination sample 2.
Example 3 (shown in fig. 10) of a method for preparing a grip sample for use in an automatic color fastness test according to the present invention:
this example is different from example 1 of the method for preparing a grip specimen for an automatic color fastness test in that:
when the sample to be tested is a woven fabric, the length and width of each layer of the woven fabric in the combination sample 2 in example 1 are uniform, and if the color fastness test is automatically performed, it is inconvenient to automatically separate the sample to be tested of the combination sample 2 from the lining at the airing stage, and therefore, the sample to be tested 20 in the combination sample 2 is made longer when the combination sample 2 is prepared in this example. For example, in the conventional test, if the test sample is prepared according to the requirements of GB/T5714-1997 color fastness to seawater in the textile color fastness test, a 40mm × 100mm test sample is taken and clamped between two 40mm × 100mm single fiber lining fabrics, and the test sample 20 is sewn along one short side to form a combined sample, in this embodiment, a test sample 20 with a short side of 40mm and a long side of more than 100mm (for example, 120mm, and other lengths of more than 100mm can be taken) is taken and clamped between two 40mm × 100mm single fiber lining fabrics, and the two single fiber lining fabrics are aligned and sewn along one short side to form a combined sample 2. The tested fabric sample 20 in the combined sample 2 manufactured in the way is longer than the attached lining fabric by 20mm at the end without sewing, so that the tested fabric 20 in the combined sample is beneficial to automatically clamping when the air-drying is needed after pressurization and heat preservation, and the tested sample 20 in the combined sample 2 is further convenient to separate from the upper attached lining fabric 22 and the lower attached lining fabric 21 and air-drying.
Example 4 of a method for preparing a grip sample for an automatic color fastness test of the present invention:
the pressing sheet 1 in the foregoing embodiment does not contact with the supporting plate 3, and if the pressing sheet 1 is tamped and pressed in the infiltration process of the combined sample 2, the pressing sheet 1 may move horizontally, so that the flatness of the combined sample may be affected, and if the combined sample 2 is not flat, the pressing requirement may not be met, and the pressing sheet in this embodiment adopts a connecting pressing sheet contacting with the supporting plate 3, so as to better fix the combined sample 2.
The connecting pressing sheet is of a structure similar to the shape of a common mobile phone shell, a through hole is formed in the contact part of the connecting pressing sheet and the combined sample 2, when the clamping sample is prepared, the connecting pressing sheet is buckled on the supporting plate 3 on which the combined sample 2 is placed like buckling the mobile phone shell on the mobile phone, so that the connecting pressing sheet cannot horizontally move relative to the supporting plate 3 in the tamping process, and the flatness and stability of the state of the combined sample 2 are ensured.
In addition to the above embodiments, the tabletting can also adopt other schemes, such as fixing the combined sample 2 on the holding plate 3 by wrapping with a water permeable film, and limiting the two ends or the whole of the combined sample 2 on the holding plate 3 by using a ring-shaped elastic object with holes with a certain width; the combined sample 2 is clamped on the holding plate 3 by using parts similar to a clamp structure at two ends of the holding plate 3, and the like, in short, the tabletting has the functions of limiting the combined sample 2 on the holding plate 3, keeping the combined sample straight and stable in shape state in the soaking process, and taking down the tabletting from the clamped sample after the combined sample is soaked, so that the clamped sample only keeps the holding plate and the combined sample.
The invention is not limited to the embodiments discussed above, and a person skilled in the art can deduce other variants from the invention, which also belong to the subject matter of the invention.
Claims (5)
1. A method for preparing a clamping sample for an automatic color fastness detection test is used for preparing a combined sample, and is characterized in that the prepared combined sample is flattened and clamped between a supporting plate and a pressing sheet to prepare the clamping sample with a sandwich structure,
the holding plate is a flat plate with a side larger than that of the combined sample,
the pressing sheet is a component for pressing the combined sample on the supporting plate, the pressing sheet is provided with holes capable of penetrating liquid and air, the part of the pressing sheet, which is contacted with the combined sample, can penetrate the liquid used in the corresponding color fastness detection,
when the clamping sample is used in the color fastness test process, the clamping sample supporting plate is placed at the lower part, the pressing sheet is horizontally placed at the upper part, the combined sample is soaked in the container, the clamping sample is integrally and automatically taken out of the liquid when excessive moisture in the combined sample is squeezed, the pressing sheet is automatically taken away, the combined sample is kept on the supporting plate, the excessive moisture in the combined sample is squeezed, the combined sample is automatically stacked and placed, pressure is applied, and the combined sample is taken down from the supporting plate until the combined sample needs to be aired.
2. The method for preparing a grip specimen for an automatic color fastness test according to claim 1, wherein the press sheet is partially or entirely in contact with the combination specimen.
3. The method of claim 1, wherein the average density of the pellet is greater than the density of the liquid for measuring fastness.
4. The method for preparing a grip specimen for an automatic color fastness detection test according to claim 1, wherein the length of the specimen to be tested in the combined specimen is longer than the length of the lining fabric and is aligned at one end in the length direction.
5. The method for preparing a clamping sample for an automatic color fastness test according to claim 1, wherein the holding plate is a glass plate or a resin plate used in the existing color fastness test process.
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