Quantitative analysis method of cellulosic fiber, polyamide and spandex blended product

Abstract

The invention discloses a quantitative analysis method for a cellulosic fiber, chinlon and spandex blended product, and belongs to the field of textile detection. According to the method, the blended product is quantitatively analyzed by adopting a 20% hydrochloric acid sequential dissolution method, and the detection system is applied to detection of cellulose fibers, chinlon and spandex, so that the treatment temperature and the treatment time in the detection process can be better controlled, the detection precision is higher, the experimental operation time is shorter, and the efficiency is higher; the quantitative analysis method is simple and convenient to operate, low in sample consumption and higher in applicability. Meanwhile, the influence of the reagent on detection personnel can be reduced, and the safety performance is excellent.

Description

Technical Field

[0001] The invention relates to the field of quantitative detection of textiles, and in particular to a quantitative analysis method for a cellulose fiber, nylon and spandex blended product. Background Art

[0002] With the advancement of science and technology and the improvement of people's living standards, single-component fabrics can no longer meet people's increasingly diversified needs for clothing. Blended fabrics are fabrics woven from blended yarns. They can meet people's different requirements by organically combining two or more different types of fibers to complement each other's strengths and weaknesses. Since the appearance and performance of blended fabrics are jointly determined by the fiber types and proportions that make up the blended yarn, it is of great significance to accurately quantify the component content in blended fabrics.

[0003] Commonly used raw materials in blended fabrics of cellulose fiber, nylon and spandex, among which cellulose fiber is also called artificial fiber. Nylon is a synthetic fiber, also called polyamide fiber, which has the characteristics of excellent wear resistance, elasticity and good elastic recovery. Spandex is an elastic fiber prepared from a type of block copolymer with polyurethane as the main component. It has good chemical resistance and is usually blended with cellulose fiber to give the textile a certain degree of stretchability. The blended fabrics of cellulose fiber, nylon and spandex have unique properties, which makes them widely used in clothing, household goods, automotive interiors and other fields, and have broad market prospects. Quantitative analysis of the three-component blended fabrics of cellulose fiber, nylon and spandex is also crucial in fiber detection.

[0004] At present, there are major drawbacks in the commonly used quantitative analysis methods for cellulose fiber nylon spandex blended products. Among them, the manual splitting method is time-consuming and inefficient, and is completely unsuitable for large-scale tasks; although the manual splitting and dissolution method reduces the time required for testing to a certain extent, it consumes a lot of samples and is relatively complicated and cumbersome to operate, and is not the best method for quantitative analysis of such blended products. The methods specified in FZ / T01095-2002 "Test Method for Fiber Content of Textile Spandex Products" and so on. Different test methods use different reagents and test steps, which will also lead to different test results. The nylon content test method specified in the current GB / T2910 standard is the 80% formic acid dissolution method, and formic acid is a fuming, flammable, and highly irritating and corrosive liquid. It is easy to splash when opening the bottle and burn the skin. Both anhydrous formic acid and 80% formic acid are highly irritating, which have a certain impact on the health of the test personnel, and are inconvenient to store and use. The current standard GB / T38015-2019 "Quantitative Chemical Analysis of Spandex and Certain Other Fibers in Textiles (20% Hydrochloric Acid Method)" also mentions the use of 20% hydrochloric acid method to test samples. However, the existing technology still has problems such as the inability to separate or incomplete separation, poor efficiency and accuracy when simultaneously testing the content of each component in blended products of cellulose fiber, nylon and spandex. There is still room for improvement in the quantitative analysis method. Summary of the invention

[0005] Based on this, in order to solve the technical problem that the existing technology has poor efficiency and accuracy in quantitative analysis of the components of cellulose fiber, nylon and spandex blended products, the present invention provides a quantitative analysis method for cellulose fiber, nylon and spandex blended products, and the specific technical solution is as follows:

[0006] A quantitative analysis method for a cellulose fiber, nylon and spandex blended product, the quantitative analysis method comprising the following steps:

[0007] Conducting preliminary qualitative identification on the blended product to obtain information about the blended product, and then determining to use a 20% hydrochloric acid sequential dissolution method to quantitatively analyze the blended product based on the information about the blended product;

[0008] Wherein, the quantitative analysis method further comprises a detection system;

[0009] The detection system includes a feeding module, a reagent processing module, a temperature regulating module, a time control module, a weighing module and a main control module, and the feeding module, the reagent processing module, the temperature regulating module, the time control module and the weighing module are respectively connected to the main control module.

[0010] Furthermore, the feeding module is used to add the blended product and split the blended product through the feeding module to obtain the split samples; the reagent processing module is used to control the addition or recovery of the reagent, and the reagent is hydrochloric acid with a mass percentage concentration of 20%; the temperature regulation module is used to control the temperature during the quantitative analysis process, so that the sample is heated and dried in the detection system; the time control module is used to control the processing time during the quantitative analysis process; the weighing module is used to weigh the sample weight; the main control module is used to control the feeding module, the reagent processing module, the temperature regulation module and the weighing module.

[0011] Furthermore, the blended product information includes at least cellulose fiber, nylon and spandex.

[0012] Furthermore, the temperature regulation module includes a first stage and a second stage, and the heating treatment temperature of the first stage is 18°C ​​to 22°C, the heating treatment time of the first stage is 15 minutes, the drying treatment temperature of the first stage is (105±3)°C, and the drying treatment time of the first stage is 30 minutes to 60 minutes; the second stage is heated to 70°C at a heating rate of 5°C / min to 8°C / min, and at a temperature of 70°C, the heating treatment time is 30 minutes, and then cooled to room temperature at a cooling rate of 10°C / min, the drying treatment temperature of the second stage is (105±3)°C, and the drying treatment time of the second stage is 30 minutes to 40 minutes.

[0013] Furthermore, the material-liquid ratio of the blended product to the reagent is 1 g / (10 mL to 200 mL).

[0014] Furthermore, the weighing module includes weighing the mass of the split sample, recorded as m0; after the first stage of drying treatment, the weighing module weighs the mass of the sample after the first stage of drying treatment, recorded as m1; after the second stage of drying treatment, the weighing module weighs the mass of the sample after the second stage of drying treatment, recorded as m2.

[0015] Furthermore, the cellulose fiber content p1, the nylon content p2 and the spandex content p3 are as follows:

[0016] P1=(m0-m1)d / m0*100%;

[0017] P2 = (m1-m2)d / m0*100%;

[0018] p3=m2d / m0*100%;

[0019] Wherein, d is the correction coefficient of the insoluble components, and the value of d is between 1.00 and 1.02.

[0020] Furthermore, the processing time includes a heating processing time in the first stage and a drying processing time in the first stage; a heating processing time in the second stage and a drying processing time in the second stage.

[0021] Furthermore, the time control module sends out a corresponding output signal when detecting that the processing time reaches a set time value, and the main control module sends out a corresponding control instruction according to the output signal of the time control module.

[0022] Furthermore, the control instructions include temperature adjustment instructions, time control instructions and weighing instructions.

[0023] Compared with the prior art, the beneficial effects include:

[0024] The present invention applies the detection system to the detection of cellulose fiber, nylon and spandex, and can better control the processing temperature and processing time of the detection process, so that the detection accuracy is higher, the experimental operation time is shorter, and the efficiency is higher; the quantitative analysis method is simple to operate as a whole, consumes less samples, and has stronger applicability. At the same time, it can also reduce the impact of reagents on detection personnel, and has excellent safety performance. DETAILED DESCRIPTION

[0025] In order to make the purpose, technical solution and advantages of the present invention more clearly understood, the present invention is further described in detail below in conjunction with its embodiments. It should be understood that the specific implementation methods described herein are only used to explain the present invention and do not limit the scope of protection of the present invention.

[0026] Unless otherwise defined, all technical and scientific terms used herein have the same meaning as those commonly understood by those skilled in the art of the present invention. The terms used herein in the specification of the present invention are only for the purpose of describing specific embodiments and are not intended to limit the present invention. The term "and / or" used herein includes any and all combinations of one or more related listed items.

[0027] A quantitative analysis method for a cellulose fiber, nylon, and spandex blended product according to an embodiment of the present invention comprises the following steps:

[0028] Conducting preliminary qualitative identification on the blended product to obtain information about the blended product, and then determining to use a 20% hydrochloric acid sequential dissolution method to quantitatively analyze the blended product based on the information about the blended product;

[0029] Wherein, the quantitative analysis method further comprises a detection system;

[0030] The detection system includes a feeding module, a reagent processing module, a temperature regulating module, a time control module, a weighing module and a main control module, and the feeding module, the reagent processing module, the temperature regulating module, the time control module and the weighing module are respectively connected to the main control module.

[0031] In one of the embodiments, the feeding module is used to add the blended product and split the blended product through the feeding module to obtain the split samples; the reagent processing module is used to control the addition or recovery of the reagent, and the reagent is hydrochloric acid with a mass percentage concentration of 20%; the temperature regulation module is used to control the temperature during the quantitative analysis process, so that the sample is heated and dried in the detection system; the time control module is used to control the processing time during the quantitative analysis process; the weighing module is used to weigh the sample weight; the main control module is used to control the feeding module, the reagent processing module, the temperature regulation module and the weighing module.

[0032] In one embodiment, the blended product information includes at least cellulose fiber, nylon and spandex.

[0033] In one embodiment, the temperature regulation module includes a first stage and a second stage, and the heating treatment temperature of the first stage is 18°C ​​to 22°C, the heating treatment time of the first stage is 15 minutes, the drying treatment temperature of the first stage is (105±3)°C, and the drying treatment time of the first stage is 30 minutes to 60 minutes; the second stage is heated to 70°C at a heating rate of 5°C / min to 8°C / min, and at 70°C, the heating treatment time is 30 minutes, and then cooled to room temperature at a cooling rate of 10°C / min, the drying treatment temperature of the second stage is (105±3)°C, and the drying treatment time of the second stage is 30 minutes to 40 minutes.

[0034] In one of the embodiments, the material-liquid ratio of the blended product to the reagent is 1 g / (10 mL to 200 mL).

[0035] In one embodiment, the weighing module includes weighing the mass of the split sample, recorded as m0; after the first stage of drying treatment, the weighing module weighs the mass of the sample after the first stage of drying treatment, recorded as m1; after the second stage of drying treatment, the weighing module weighs the mass of the sample after the second stage of drying treatment, recorded as m2.

[0036] In one embodiment, the cellulose fiber content p1, the nylon content p2 and the spandex content p3 are as follows:

[0037] P1=(m0-m1)d / m0*100%;

[0038] P2 = (m1-m2)d / m0*100%;

[0039] p3=m2d / m0*100%;

[0040] Wherein, d is the correction coefficient of the insoluble components, and the value of d is between 1.00 and 1.02.

[0041] In one embodiment, the processing time includes a heating processing time in the first stage and a drying processing time in the first stage; and a heating processing time in the second stage and a drying processing time in the second stage.

[0042] In one embodiment, the time control module sends out a corresponding output signal when detecting that the processing time reaches a set time value, and the main control module sends out a corresponding control instruction according to the output signal of the time control module.

[0043] In one embodiment, the control instructions include temperature adjustment instructions, time control instructions and weighing instructions.

[0044] In one of the embodiments, after detecting that the blended product is split, the main control module outputs a weighing instruction A to the weighing module to weigh the mass of the split sample to obtain the m0 value.

[0045] In one embodiment, the main control module outputs a temperature adjustment instruction A of 18°C ​​to 22°C to the temperature adjustment module, and simultaneously sends a time control instruction A of 15 minutes to the time control module. After the time is reached, the main control module outputs a temperature adjustment instruction B of (105±3)°C to the temperature adjustment module, and simultaneously sends a time control instruction B of 30 minutes to 60 minutes to the time control module, thereby completing the first stage.

[0046] In one embodiment, after the first stage is completed, the main control module sends a weighing instruction B to the weighing module to obtain the m1 value.

[0047] In one of the embodiments, after obtaining the m1 value, the main control module outputs a temperature adjustment instruction C of 70°C to the temperature adjustment module and controls the heating rate, and at the same time outputs a time control instruction C of 30min to the time control module. After the time is reached, the main control module outputs a temperature adjustment instruction D of (105±3)°C to the temperature adjustment module, and at the same time outputs a time control instruction D of 30min~40min to the time control module, thereby completing the second stage.

[0048] In one embodiment, after the second stage is completed, the main control module sends a weighing instruction C to the weighing module to obtain the m2 value.

[0049] In the above scheme, by applying the detection system to the detection of cellulose fibers, nylon and spandex, the processing temperature and processing time of the detection process can be better controlled, so that the detection accuracy is higher, the experimental operation time is shorter, and the efficiency is higher; the quantitative analysis method is simple to operate as a whole, consumes less samples, is less affected by the test samples and reagents, and has stronger applicability.

[0050] The embodiments of the present invention will be described in detail below with reference to specific examples.

[0051] Take 1g of knitted sample and split it through the feeding module. The main control module outputs a weighing instruction A to the weighing module to weigh the mass of the split sample to obtain the m0 value;

[0052] The main control module controls the reagent processing module to add 100mL of hydrochloric acid with a mass percentage concentration of 20%. After sufficient wetting, the main control module outputs a temperature adjustment instruction A of 20°C to the temperature adjustment module, and at the same time sends a time control instruction A of 15min to the time control module. After the time is reached, the main control module outputs a temperature adjustment instruction B of 100°C to the temperature adjustment module, and at the same time sends a time control instruction B of 30min to the time control module, completing the first stage;

[0053] The main control module sends a weighing instruction B to the weighing module to obtain the m1 value;

[0054] The main control module outputs a temperature adjustment instruction C of 70°C to the temperature adjustment module and controls the heating rate, and outputs a time control instruction C of 30 minutes to the time control module. When the time is reached, the main control module outputs a temperature adjustment instruction D of 100°C to the temperature adjustment module and outputs a time control instruction D of 30 minutes to the time control module, completing the second stage;

[0055] The main control module sends a weighing instruction C to the weighing module to obtain the m2 value.

[0056] Using the same test method, multiple groups of tests were set up and the following results were obtained through calculation, as shown in Table 1.

[0057] Table 1: Content test results

[0058]

[0059]

[0060] From the data analysis in Table 1, it can be seen that the control of reagents, temperature and time through the detection system can more accurately analyze the content of cellulose fiber, nylon and spandex in the blended products. It not only has high accuracy, but also can be systematized, which helps to improve the efficiency of detection and has high safety.

[0061] The technical features of the above-described embodiments may be arbitrarily combined. To make the description concise, not all possible combinations of the technical features in the above-described embodiments are described. However, as long as there is no contradiction in the combination of these technical features, they should be considered to be within the scope of this specification.

[0062] The above-mentioned embodiments only express several implementation methods of the present invention, and the descriptions thereof are relatively specific and detailed, but they cannot be understood as limiting the scope of the invention patent. It should be pointed out that, for ordinary technicians in this field, several variations and improvements can be made without departing from the concept of the present invention, and these all belong to the protection scope of the present invention. Therefore, the protection scope of the patent of the present invention shall be subject to the attached claims.

Claims

1. A quantitative analysis method for cellulose fiber nylon spandex blended products, characterized in that: The quantitative analysis method comprises the following steps: Conducting preliminary qualitative identification on the blended product to obtain information about the blended product, and then determining to use a 20% hydrochloric acid sequential dissolution method to quantitatively analyze the blended product based on the information about the blended product; Wherein, the quantitative analysis method further comprises a detection system; The detection system includes a feeding module, a reagent processing module, a temperature regulating module, a time control module, a weighing module and a main control module, and the feeding module, the reagent processing module, the temperature regulating module, the time control module and the weighing module are respectively connected to the main control module.

2. The quantitative analysis method according to claim 1, characterized in that The feeding module is used to add the blended product and split the blended product through the feeding module to obtain the split samples; the reagent processing module is used to control the addition or recovery of the reagent, and the reagent is hydrochloric acid with a mass percentage concentration of 20%; the temperature adjustment module is used to control the temperature during the quantitative analysis process, so that the sample is heated and dried in the detection system; the time control module is used to control the processing time during the quantitative analysis process; The weighing module is used for weighing the sample weight; the main control module is used for controlling the feeding module, the reagent processing module, the temperature regulating module and the weighing module.

3. The quantitative analysis method according to claim 2, characterized in that: The blended product information at least includes cellulose fiber, nylon and spandex.

4. The quantitative analysis method according to claim 3, characterized in that: The temperature regulation module includes a first stage and a second stage, and the heating treatment temperature of the first stage is 18°C ​​to 22°C, the heating treatment time of the first stage is 15 minutes, the drying treatment temperature of the first stage is (105±3)°C, and the drying treatment time of the first stage is 30 minutes to 60 minutes; the second stage is heated to 70°C at a heating rate of 5°C / min to 8°C / min, and at a temperature of 70°C, the heating treatment time is 30 minutes, and then cooled to room temperature at a cooling rate of 10°C / min, the drying treatment temperature of the second stage is (105±3)°C, and the drying treatment time of the second stage is 30 minutes to 40 minutes.

5. The quantitative analysis method according to claim 4, characterized in that: The material-liquid ratio of the blended product to the reagent is 1 g / (10 mL to 200 mL).

6. The quantitative analysis method according to claim 5, characterized in that: The weighing module includes weighing the mass of the split sample, recorded as m0; after the first stage of drying treatment, the weighing module weighs the mass of the sample after the first stage of drying treatment, recorded as m1; after the second stage of drying treatment, the weighing module weighs the mass of the sample after the second stage of drying treatment, recorded as m2.

7. The quantitative analysis method according to claim 6, characterized in that: The cellulose fiber content p1, nylon content p2 and spandex content p3 are as follows: P1=(m0-m1)d / m0*100%; P2 = (m1-m2)d / m0*100%; p3=m2d / m0*100%; Wherein, d is the correction coefficient of the insoluble components, and the value of d is between 1.00 and 1.

02.

8. The quantitative analysis method according to claim 4, characterized in that: The processing time includes a heating processing time in the first stage and a drying processing time in the first stage; and a heating processing time in the second stage and a drying processing time in the second stage.

9. The quantitative analysis method according to claim 8, characterized in that: The time control module sends out a corresponding output signal when detecting that the processing time reaches a set time value, and the main control module sends out a corresponding control instruction according to the output signal of the time control module.

10. The quantitative analysis method according to claim 9, characterized in that: The control instructions include temperature adjustment instructions, time control instructions and weighing instructions.

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