Device for detecting wood pulp fibers and viscose fibers in non-woven fabric

Abstract

The utility model relates to the field of disposable hygienic product detection, and discloses a device for detecting wood pulp fibers and viscose fibers in non-woven fabrics, which comprises a device body, the top of the device body is connected with an oscillation base through a shakable fold page mechanism, and the device is characterized in that a left side box body and a right side box body are arranged on the oscillation base; the left side box body and the right side box body are respectively provided with an upper cover, the lower surface of the upper cover of the right side box body is fixedly connected with an upper cover partition, and the interior of the right side box body is fixedly connected with a lower partition. By evaluating the distribution conditions of the wood pulp fibers and the viscose fibers in different partitions, the proportion of the wood pulp fibers to the viscose fibers in the non-woven fabric can be accurately detected, so that the effect of ensuring that a product conforms to related standards and regulations can be achieved.

Description

Technical Field

[0001] The utility model relates to the field of disposable hygiene product testing equipment, in particular to a device and method for detecting wood pulp fibers and viscose fibers in non-woven fabrics. Background Art

[0002] Nowadays, people's awareness of personal hygiene has been continuously strengthened, and the wet wipe product segment in the disposable hygiene product industry has developed vigorously. In the past two years, the new star product, wet toilet paper, has grown rapidly, and the current market has reached 3 billion. The non-woven fabric raw materials used in wet toilet paper are slightly different from those of ordinary wet wipes. Since the use scenario of wet toilet paper is mostly in the bathroom, consumers need to throw it into the toilet without blocking it. The non-woven fabric used is a flushable spunlace non-woven fabric.

[0003] The raw materials for making flushable spunlace non-woven fabrics are wood pulp fibers and viscose fibers. The function of wood pulp fibers is to be flushable and not blocked when flushed into the toilet; viscose fibers give wet toilet paper a certain strength so that it won't break easily when wiped. Each plays its role. The price of viscose fibers is higher than that of wood pulp fibers. However, upstream enterprises (wet toilet paper manufacturers) of flushable spunlace non-woven fabrics cannot supervise the ratio of wood pulp fibers to viscose fibers, resulting in being controlled by others, unable to correctly control the price of flushable spunlace non-woven fabrics and unable to detect whether the fibers are in the ratio required by the enterprise. Content of the Utility Model

[0004] Aiming at the deficiencies of the prior art, the utility model provides a device for detecting wood pulp fibers and viscose fibers in non-woven fabrics, which solves the problem that upstream enterprises (wet toilet paper manufacturers) of flushable spunlace non-woven fabrics cannot supervise the ratio of wood pulp fibers to viscose fibers, resulting in being controlled by others, unable to correctly control the price of flushable spunlace non-woven fabrics and unable to detect whether the fibers are in the ratio required by the enterprise.

[0005] To achieve the above purposes, the utility model is realized through the following technical solutions: A device for detecting wood pulp fibers and viscose fibers in non-woven fabrics includes a device body. The top of the device body is connected with an oscillating base through a swayable pleated page mechanism. There are a left box body and a right box body arranged on the oscillating base. Upper covers are arranged on both the left box body and the right box body. Among them, a cover partition is fixedly connected to the lower surface of the upper cover of the right box body, and a lower partition is fixedly connected to the inside of the right box body.

[0006] The oscillating base includes a base body and a box body fixing grid frame arranged on the base body. The bottoms of the two box bodies have connecting plug blocks corresponding to and cooperating with the grids of the box body fixing grid frame, and the box bodies are connected and fixed by embedding the connecting plug blocks into the grids.

[0007] The box fixed grid frame includes an outer frame connected to the base body and a grid frame slidably disposed within the outer frame. Vibration springs are provided between both ends of the grid frame and the outer frame.

[0008] The present utility model provides a device for detecting wood pulp fibers and viscose fibers in non-woven fabrics, and has the following beneficial effects:

[0009] By evaluating the distribution of wood pulp fibers and viscose fibers in different partitions, if there are significant differences in the weight percentages of wood pulp fibers and viscose fibers in different partitions, it may indicate that they have not been fully separated. If the weight percentages of wood pulp fibers and viscose fibers tend to be consistent in different partitions, it may indicate that they have been fully separated. The ratio of wood pulp fibers and viscose fibers in the non-woven fabric can be accurately detected, thereby achieving the effect of ensuring that the product meets relevant standards and regulations.

[0010] The box is installed and fixed through the grid frame, which is simple, convenient, highly practical, and has good use effects. BRIEF DESCRIPTION OF THE DRAWINGS

[0011] Figure 1 is a perspective view of the present utility model;

[0012] Figure 2 is a schematic diagram of the oscillation mechanism of the present utility model;

[0013] Figure 3 is a cross-sectional view of the right box of the present utility model;

[0014] Figure 4 is a schematic diagram of the shakable corrugated page of the present utility model;

[0015] Figure 5 is a schematic diagram of the box fixed grid frame of the present utility model;

[0016] Figure 6 is a flowchart of the method for detecting using the device of the present utility model.

[0017] Among them, 1. shakable corrugated page mechanism; 2. oscillation base; 3. left box; 4. right box; 5. upper lid; 6. upper partition; 7. lower partition; 8. box fixed grid frame; 801. grid frame; 802. vibration spring; 803. outer frame. DETAILED DESCRIPTION OF THE EMBODIMENTS

[0018] The technical solutions of the present utility model will be clearly and completely described below in conjunction with the drawings of the present utility model. Obviously, the described embodiments are only a part of the embodiments of the present utility model, rather than all of the embodiments. All other embodiments obtained by those of ordinary skill in the art based on the embodiments of the present utility model without creative efforts shall fall within the protection scope of the present utility model.

[0019] Example:

[0020] As Figure 1 - Figure 3 shown, an embodiment of the present utility model provides a device for detecting wood pulp fibers and viscose fibers in non-woven fabrics, including a device body. The top of the device body is connected with an oscillating base 2 through a swayable pleated page mechanism 1. A left box body 3 and a right box body 4 are arranged on the oscillating base 2. Upper covers are arranged on both the left box body 3 and the right box body 4. Among them, a cover partition 6 is fixedly connected to the lower surface of the upper cover 5 of the right box body 4, and a lower partition 7 is fixedly connected to the inside of the right box body 4. The oscillating base 2 includes a base body and a box body fixed grid frame 8 arranged on the base body. The box body fixed grid frame 8 includes an outer frame 803 connected to the base body and a grid frame 801 slidably arranged inside the outer frame 803. Vibration springs 802 are arranged between both ends of the grid frame 801 and the outer frame 803. The bottoms of the two box bodies have connection insertion blocks corresponding to and cooperating with the grids of the grid frame 801, forming a plug-in fitting structure. The box body is connected and fixed by fitting its connection insertion blocks into the grids of the grid frame 801.

[0021] A method for detecting wood pulp fibers and viscose fibers in non-woven fabrics includes the following steps:

[0022] Step 1, sampling: First, cut the dispersible spunlace fabric into a size of 150mm×200mm, and take 10 sample fabrics for weighing and recording;

[0023] Step 2, smashing the sample with a blender: Put the sample fabric into a blender for smashing. After smashing, take out all the fragments completely. The size of the smashed sample is about 1mm;

[0024] Step 3, soaking the crushed sample: Put the smashed sample fabric into the left box body 3 of the solution containing sodium hydroxide, urea and water. The formula of this solution is 7% mass fraction of sodium hydroxide, 12% mass fraction of urea and 71% mass fraction of water. The solution is pre-frozen at -20°C for 2 hours, taken out and placed at room temperature for 10 - 15 minutes. This mixed solution can destroy the hydrogen bond force between fibers and prepare for the separation of wood pulp fibers and viscose fibers. It needs to be soaked in the left box body for 24 hours, and after 24 hours, turn on the oscillation switch of the left oscillation mechanism 8 to accelerate the destruction of the hydrogen bond force between fibers;

[0025] Step 4, separating the sample: After 24 hours, fish out all the fibers and put them into the right box body 4. The box body is filled with water. The fibers wait in the right box body for 24 hours to ensure that the wood pulp fibers and viscose fibers can be separated. Similarly, turn on the oscillation switch to accelerate the separation of the fibers;

[0026] Step 5, Fiber analysis and identification: Analyze the fiber samples divided into 6 partitions to verify the fiber components therein. If the fibers in each partition belong to the same type, it can be basically determined that the wood pulp fibers and viscose fibers have been completely separated;

[0027] Step 6, Fiber weighing and calculation: Take all the fibers in the 6 partitions above and below, dry them, and weigh them. Use the formulas (dry weight of wood pulp fibers / total weight) * 100% and (dry weight of viscose fibers / total weight) * 100% to calculate the weight percentages of the wood pulp fibers and viscose fibers.

[0028] In Step 1, prepare the required water-dispersible spunlace fabric materials and ensure that their quality meets the requirements. Use scissors to cut the water-dispersible spunlace fabric into a size of 150 mm × 200 mm, ensure that the size of each sample fabric is consistent, take 10 cut sample fabrics, and place them on a weighing platform for weighing. Zero the weighing platform to ensure accuracy. Place each sample fabric on the weighing platform one by one and record their weights. After ensuring accurate readings, record the weight data. Repeat the above steps until all sample fabrics have been weighed and their weights are recorded.

[0029] In Step 2, prepare the blender equipment and the required sample fabrics. Put the sample fabrics into the blender one by one, ensuring not to stack too much to avoid affecting the crushing effect. According to the operating requirements of the blender, adjust the appropriate running time and rotation speed to ensure that appropriate parameters are selected to achieve crushing into fragments of about 1 mm. Start the blender and let it run for the specified time to ensure that the sample fabrics are fully crushed. After the crushing is completed, stop the machine operation, open the blender, take out the crushed sample fabric fragments, and use tweezers or a sieve to completely take out the sample fabric fragments, ensuring that there is no residue in the blender. Place the taken-out sample fabric fragments in a clean container for subsequent processing or analysis.

[0030] In Step 3, prepare the required left box body and the mixed solution, ensuring that the mass fractions of sodium hydroxide, urea, and water in the solution meet the requirements: 7% sodium hydroxide, 12% urea, and 71% water. Place the shredded sample cloth into the left box body, ensuring that the sample cloth is fully immersed in the solution. Ensure that the left box body is sealed and all connection parts are in good condition to prevent solution leakage. First, freeze the solution at a temperature of -20°C, start the freezing system, cool and pre-freeze the solution for 2 hours to promote the formation of ice crystals between the fibers. After the pre-freezing is completed, turn off the freezing system, take out the solution, and let it stand at room temperature for 10 - 15 minutes to allow the solution to return to room temperature. The ice crystals between the fibers gradually dissolve. Immerse the sample cloth in the left box body at room temperature for 24 hours, allowing the mixed solution to fully act on the fibers and break the hydrogen bond force between the fibers, preparing for the separation of wood pulp fibers and viscose fibers. After 24 hours, turn on the oscillation switch in the left box body to oscillate the sample cloth in the solution to accelerate the breaking of the hydrogen bond force between the fibers, and adjust the working time and oscillation intensity of the oscillation switch according to the specific situation.

[0031] In Step 4, prepare the right box body and sufficient water, ensuring that the box body is completely filled with water. Scoop out all the fibers from the left box body, ensuring that the fibers are placed into the right box body as intact as possible. Place the fibers into the water in the right box body, ensuring that the fibers are fully immersed in the water. Ensure that the right box body is sealed and all connection parts are in good condition to prevent water leakage. Let the fibers soak in the right box body for 24 hours to ensure that the wood pulp fibers and viscose fibers can gradually separate. The oscillation switch in the right box body can be turned on appropriately during the waiting period to accelerate the separation of the fibers. After the waiting period ends, stop the oscillation in the right box body and turn off the oscillation switch in the box body.

[0032] In Step 4, the right box body 4 is divided into 6 partition spaces by the upper partition 6 of the upper cover 5 and the lower partition 7 of the bottom surface. The density of water is 1 g / cm 3 , the density of wood pulp fibers is 0.7 - 0.8 g / cm 3 , and the density of viscose fibers is 1.3 - 1.5 g / cm 3 , so the wood pulp fibers can float above the water, and the viscose fibers will sink below the water.

[0033] In Step 5, prepare fiber samples divided into 6 partitions. Conduct microscopic observation on the fiber samples in each partition to observe the morphology and characteristics of the fibers. Through microscopic observation, the type and morphology of the fibers can be preliminarily judged. Conduct chemical analysis on the fiber samples in each partition to determine the chemical composition of the fibers. Chemical reagents can be used to treat the samples, and the components of the fibers can be identified through colorimetric reactions and chromogenic reactions. Conduct fiber dyeing experiments to distinguish wood pulp fibers and viscose fibers. Specific dyes can be used to dye the samples. Different types of fibers will exhibit different colors or reactions after dyeing, thus enabling differentiation. Conduct fiber strength tests to evaluate the strength and durability of the fibers in different partitions. A tensile testing machine can be used to conduct mechanical property tests on the fiber samples to determine the performance differences between wood pulp fibers and viscose fibers. Conduct fiber chemical analysis, including measurement of the component ratio, fiber length, and diameter parameters of the fibers. Through chemical analysis, the content ratio of wood pulp fibers and viscose fibers in different partitions can be determined, thereby verifying whether they have been completely separated.

[0034] In Step 6, prepare all the fiber samples taken from 6 partitions in the upper and lower directions. Prepare an accurate weighing scale. Put all the fiber samples in each partition into the oven for drying to completely remove all moisture, ensure that the weights of all samples are stable after drying and no longer change. Use the accurate weighing scale to weigh the dried wood pulp fiber and viscose fiber samples respectively, and record the weight of each sample. Use the following formula to calculate the weight percentages of wood pulp fibers and viscose fibers:

[0035] Weight percentage of wood pulp fibers = (dry weight of wood pulp fibers / total weight) * 100%

[0036] Weight percentage of viscose fibers = (dry weight of viscose fibers / total weight) * 100%

[0037] Substitute the dry weight and total weight of each sample into the formula for calculation, record the calculated weight percentages of wood pulp fibers and viscose fibers, compare the weight percentages of fibers in different partitions, and observe whether there are obvious differences. Conduct statistical analysis - calculate the average value and standard deviation to evaluate the reliability and repeatability of the data. Based on the calculated weight percentages, evaluate the distribution of wood pulp fibers and viscose fibers in different partitions. If there are obvious differences in the weight percentages of wood pulp fibers and viscose fibers in different partitions, it may indicate that they have not been completely separated. If the weight percentages of wood pulp fibers and viscose fibers tend to be consistent in different partitions, it may indicate that they have been completely separated.

[0038] Table 1: Summary Table of Fiber Separation Experiment Results

[0039]

[0040]

[0041] Although embodiments of the present utility model have been shown and described, those of ordinary skill in the art can understand that various changes, modifications, substitutions, and variations can be made to these embodiments without departing from the principle and spirit of the present utility model. The scope of the present utility model is defined by the appended claims and their equivalents.

Claims

1. A device for detecting wood pulp fibers and viscose fibers in non-woven fabrics, comprising a device body, the top of which is connected to an oscillating base via a swayable pleated leaf mechanism, characterized in that: A left box body and a right box body are arranged on the oscillation base, and an upper cover is arranged on both the left box body and the right box body, wherein the lower surface of the upper cover of the right box body is fixedly connected with an upper cover partition, and the interior of the right box body is fixedly connected with a lower partition.

2. The device for detecting wood pulp fibers and viscose fibers in nonwoven fabrics according to claim 1, characterized in that: The oscillating base comprises a base body and a box fixing grid frame arranged on the base body.

3. The device for detecting wood pulp fibers and viscose fibers in nonwoven fabrics according to claim 2, characterized in that: The box body fixed grid frame comprises an outer frame connected to the base body and a grid frame slidably arranged in the outer frame, and vibration springs are arranged between the two ends of the grid frame and the outer frame.

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