Method for testing mite resistance of household textile

Abstract

The invention discloses a method for testing mite resistance of household textiles, which comprises the following steps of: respectively placing mites and feed in two vessel spaces, and separating the two vessels by using a sample; after culturing for a certain time, the number of the mites in the vessels is counted, and the mite resistance rate is calculated according to the adopted test method so as to evaluate the mite resistance effect. The method for testing and evaluating the anti-mite performance of the household textile by using the blocking method is suitable for various household textiles without anti-mite auxiliaries, including fabrics and finished products, such as textile fabrics and finished products used in families, hotels / restaurants, student apartments, old-age care institutions, leisure places, traffic transportation places and the like.

Description

Technical Field

[0001] The invention belongs to the field of anti-mite performance of household textiles, and in particular relates to a method for testing the anti-mite performance of household textiles. Background Art

[0002] At present, it is known that the harm of mites to the human body is mainly respiratory allergic symptoms and skin inflammation caused by bacterial infection. Textiles worn or used daily should be washed and changed frequently to achieve the purpose of eliminating mites. Household textiles, such as bedding, sofa fabrics, curtains, etc., are washed or changed relatively infrequently due to their usage characteristics. In a hot and humid environment, mites are more likely to breed, thus endangering human health. In the 1980s, the purpose of killing and inhibiting mites could be achieved by adding certain chemical additives to textiles. The release of GB / T24253 "Evaluation of Anti-mite Performance of Textiles" and FZ / T 62012 "Anti-mite Bedding" in 2009 ended the situation of no standards for anti-mite textiles in China, and promoted the rapid development of the anti-mite textile market.

[0003] There are two main ways to prevent mites from entering textiles: one is to repel mites or inhibit their growth and reproduction, which is the "anti-mite" performance reflected in the GB / T 24253 "Evaluation of Anti-mite Performance of Textiles" and FZ / T 62012 "Anti-mite Bedding" standards. This performance is generally achieved through post-finishing of textiles with chemical additives; the other is to prevent mites from penetrating products and coming into contact with people, which is "mite prevention", that is, by reducing the pore size of textiles without using chemical additives to prevent or reduce the penetration of mites, such as high-count and high-density fabrics, composite fabrics, non-woven materials, etc.

[0004] In recent years, with people's demand for green, safe, and high-quality functional textiles, research on anti-mite textiles that do not use chemical additives has been carried out one after another. Studies have found that by reducing the pores of textiles, the penetration of mites can be blocked to achieve the purpose of anti-mite. This safer anti-mite textile has further stimulated people's consumer demand. The sales of such products on major domestic shopping platforms are increasing day by day. It is expected that consumer demand will reach a market size of 30 billion in 2025. However, due to the lack of corresponding testing standards and evaluation methods, there are no corresponding methods and standard logos on the product details page of anti-mite textiles that do not use chemical additives. There have been embarrassing incidents in which testing agencies use GB / T 24253 "Evaluation of Anti-mite Performance of Textiles" for testing and judge them as unqualified, which has seriously affected the production, sales and promotion of such products. Therefore, the problem of the lack of testing methods and standards for "anti-mite" products needs to be solved urgently.

[0005] At the same time, according to the "2023-2029 China Anti-mite Bedding Development Innovation Model and Key Enterprise Research Report" released by Market Research Online, the market size of China's anti-mite bedding industry has been growing significantly. In 2018, the market size of China's anti-mite bedding industry reached 13 billion yuan, and the demand for anti-mite bedding will reach 30 billion yuan in 2025. Looking forward to the future demand for public textiles such as transportation and leisure places, the huge market provides a strong demand basis for the implementation of the standard.

[0006] After the implementation of the testing method of the present invention, it plays a positive role in supplementing and improving the testing and evaluation methods of anti-mite products, meets consumers' needs for green, better life and emerging consumption, provides technical support for complaints and disputes in market activities, reduces the energy consumption generated by textile finishing, and further promotes the market development of anti-mite textiles.

[0007] The technical principles and test methods involved in this invention have been proven to be relatively mature through preliminary research, and the key technical content and test method steps have formed a preliminary plan. The research process is completely innovative, and there is no "neck-strangling" technology, which is convenient for the majority of testing institutions to expand their projects. Summary of the invention

[0008] Purpose of the invention: In order to solve the deficiencies of the prior art, the present invention provides a method for testing the mite-resistant performance of household textiles.

[0009] Technical solution: A method for testing the anti-mite performance of household textiles, comprising the following steps:

[0010] Step 1: Select a representative specimen from each sample and cut it into a square with a side length of 8cm×8cm or a circle with a diameter of 8cm as a specimen. Take 3 specimens respectively;

[0011] Step 2: Place the sample in dry heat at 65°C ± 5°C for 10 minutes;

[0012] Step 3: Wash the three samples in step 1 according to the test condition A1M in GB / T 12490-2007. The specific operation of one cycle is as follows: add 10 steel balls to 150mL of solution, wash at 40℃ for 45min, take out the sample and wash it twice in 100mL of 40℃ water, each time for 1min. One cycle is equivalent to 5 washes. After reaching the specified number of washes, wash the sample thoroughly with water and dry it;

[0013] Step 4: Weigh 0.05 g of mite feed into a culture dish, and completely cover the square hole at the bottom of the culture dish with a PTFE membrane and stick it firmly;

[0014] Step 5: Place the test sample: Cover the test sample on the culture dish and use a glue gun to firmly adhere the edge of the culture dish and the test sample together;

[0015] Step 6: Place 2000±200 live mites on the test fabric;

[0016] Step 7: Use a glue gun to firmly glue the edge of another culture dish and the test sample together, and use the PTFE membrane to completely cover the square hole at the bottom of the culture dish and firmly glue it;

[0017] Step 8. Place the above test device in a constant temperature and humidity incubator at a temperature of 25°C ± 2°C and a relative humidity of 75% ± 5%;

[0018] Step 9: After 24 hours of incubation, observe with a dissecting microscope or stereo microscope and use appropriate methods to count the number of adult mites and nymphs in the sample culture dish B;

[0019] Step 10, result calculation: Calculate the mite blocking rate (%) according to formula (1). The test result is the average value of the three samples, rounded to the nearest digit, where:

[0020]

[0021] In the formula: M——mite prevention rate, %; M1——the number of mites in space B; M0——the initial number of mites in space A.

[0022] As an optimization: the temperature range of the constant temperature and humidity incubator is 20°C to 40°C, with an accuracy of ±1°C; the humidity range is 70% to 90%, with an accuracy of ±5%.

[0023] As an optimization: the culture dish is made of plastic or glass, with a diameter of 58 mm, a height of 15 mm, and a square hole of 20 mm×20 mm at the bottom. The square hole is covered with a polytetrafluoroethylene (PTFE) membrane and firmly adhered.

[0024] As an optimization: the mite feed is a powdered feed with a particle diameter of less than 0.1m and needs to be sterilized.

[0025] As an optimization, the mites used are adult male or female dust mites or nymphs.

[0026] Beneficial effects: The present invention uses a barrier method to test and evaluate the anti-mite performance of household textiles, which is applicable to various types of household textiles that do not contain anti-mite additives, including fabrics and finished products, such as textile fabrics and finished products used in homes, hotels / restaurants, student dormitories, nursing homes, leisure places, transportation and other places.

[0027] The main technical contents of the present invention include safety precautions, principles, equipment and materials, sample mites, sample preparation, sample steps, and result calculation.

[0028] The technical principle of the present invention is to place mites and feed in two containers respectively, and separate the two containers with a sample. After a certain period of cultivation, the number of mites in the containers is counted, and the mite-blocking rate is calculated according to the adopted test method to evaluate the mite-blocking effect.

[0029] The present invention can improve the testing and evaluation method of anti-mite products: the main anti-mite principles of textiles can be divided into two types: one is to repel mites or inhibit the growth and reproduction of mites, that is, the "anti-mite" embodied in the standards GB / T 24253 "Evaluation of Anti-mite Performance of Textiles" and FZ / T62012 "Anti-mite Bedding", and this performance is generally obtained by post-finishing textiles with chemical additives; the other is to prevent mites from penetrating products and contacting people, that is, "mite blocking", that is, without using chemical additives, by reducing the pore size of textiles to prevent or reduce the penetration of mites, such as high-count and high-density fabrics, composite fabrics, non-woven materials, etc.

[0030] With the demand for green, safe, and high-quality functional textiles, research on anti-mite textiles without the use of chemical additives has been carried out. Studies have found that by reducing the pores of textiles, the penetration of mites can be blocked, thus achieving the purpose of anti-mite. This safer anti-mite textile has further stimulated market demand. However, since there are no corresponding test standards and evaluation methods for anti-mite performance, such textiles currently lack identification or cannot be correctly evaluated. Therefore, formulating standards that match "anti-mite" performance will further improve the testing and evaluation methods of China's anti-mite products.

[0031] The present invention can improve the safety of anti-mite textiles: Due to the characteristics of household textiles, the frequency of washing or replacement is relatively low. In a hot and humid environment, mites are more likely to breed, which in turn endangers human health. The anti-mite function is generally achieved by finishing with chemical additives to achieve the effect of repelling or inhibiting mites. Mite-resistant textiles that do not use chemical additives reduce the pore size of the textiles to prevent or reduce mites from penetrating the product and contacting the human body. The establishment of this project will greatly improve the safety of such textiles and meet people's demand for green, safe, and high-quality functional textiles.

[0032] The present invention can promote the development of the anti-mite textile market: the sales of anti-mite textiles are increasing day by day, and it is estimated that the consumer demand will reach a market size of 30 billion in 2025. The market demand for anti-mite textiles that do not use chemical additives is also expanding year by year. Therefore, formulating standards that match the "anti-mite" performance will effectively promote the sales and promotion of such products, meet consumers' needs for green, better life and emerging consumption, provide technical support for complaints and disputes in market activities, and further promote the market development of anti-mite textiles. BRIEF DESCRIPTION OF THE DRAWINGS

[0033] Figure 1 It is a structural schematic diagram of the constant temperature and humidity incubator of the present invention. DETAILED DESCRIPTION

[0034] The technical solutions in the embodiments of the present invention will be described clearly and completely below so that those skilled in the art can better understand the advantages and features of the present invention, thereby making a clearer definition of the protection scope of the present invention. The embodiments described in the present invention are only a part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments in the present invention, all other embodiments obtained by ordinary technicians in the field without creative work are within the scope of protection of the present invention.

[0035] Example

[0036] Dust mites are dust mites that can cause allergic reactions in humans. They belong to the class Arthropoda, class Arachnida, and class Acari. They are tiny animals with a spherical or elongated body. The basic structure of the insect body is divided into two parts: the jaws and the body. Adults and nymphs have four pairs of legs, while larvae have three pairs of legs. (Source: GB / T24253-2009, 3.1). Mite resistance refers to the ability of a product to prevent mites from penetrating fabrics.

[0037] The test mites in the present invention are adult male and female mites or nymphs of Dermatophagoides farinae. The present invention places the mites and feed in two container spaces respectively, and the two containers are separated by a sample. After a certain period of cultivation, the number of mites in the containers is counted respectively, and the mite-blocking rate is calculated according to the test method adopted to evaluate the mite-blocking effect.

[0038] The equipment and materials of the present invention are as follows:

[0039] 1.Dissecting microscope or stereo microscope.

[0040] 2. Constant temperature and humidity incubator, temperature range 20℃~40℃, accuracy is ±1℃; humidity range 70%~90%, accuracy is ±5%.

[0041] 3. Culture dish, made of plastic or glass, 58mm in diameter, 15mm in height, with a 20mm×20mm square hole at the bottom, and a polytetrafluoroethylene (PTFE) membrane covering the square hole and firmly glued.

[0042] 4. Powdered feed for mites, with a particle diameter of less than 0.1m, must be sterilized. The nutritional composition of mite feed refers to Appendix A of GB / T 24253-2009.

[0043] 5. Mite counting tools: counter, dissecting needle, brush.

[0044] 6. Oven.

[0045] 7. Balance, accuracy 0.001g.

[0046] 8. Glue gun, glue stick. Specific embodiment 1

[0048] A method for testing the mite-proof performance of household textiles comprises the following steps:

[0049] Step 1: Select a representative specimen from each sample and cut it into a square with a side length of 8cm×8cm or a circle with a diameter of 8cm as a specimen. Take 3 specimens respectively;

[0050] Step 2: Place the sample in a dry heat condition at 60°C for 10 minutes;

[0051] Step 3: Wash the three samples in step 1 according to the test condition A1M in GB / T 12490-2007. The specific operation of one cycle is as follows: add 10 steel balls to 150mL of solution, wash at 40℃ for 45min, take out the sample and wash it twice in 100mL of 40℃ water, each time for 1min. One cycle is equivalent to 5 washes. After reaching the specified number of washes, wash the sample thoroughly with water and dry it;

[0052] Step 4: Weigh 0.05 g of mite feed into a culture dish, and completely cover the square hole at the bottom of the culture dish with a PTFE membrane and stick it firmly;

[0053] Step 5: Place the test sample: Cover the test sample on the culture dish and use a glue gun to firmly adhere the edge of the culture dish and the test sample together;

[0054] Step 6: Place 1,800 live mites on the test fabric;

[0055] Step 7: Use a glue gun to firmly glue the edge of another culture dish and the test sample together, and use the PTFE membrane to completely cover the square hole at the bottom of the culture dish and firmly glue it;

[0056] Step 8: Place the above test device in a constant temperature and humidity incubator at a temperature of 23°C and a relative humidity of 70%;

[0057] Step 9: After 24 hours of incubation, observe with a dissecting microscope or stereo microscope and use appropriate methods to count the number of adult mites and nymphs in the sample culture dish B;

[0058] Step 10, result calculation: Calculate the mite blocking rate (%) according to formula (1). The test result is the average value of the three samples, rounded to the nearest digit, where:

[0059]

[0060] In the formula: M——mite prevention rate, %; M1——the number of mites in space B; M0——the initial number of mites in space A. Specific embodiment 2

[0062] A method for testing the mite-proof performance of household textiles comprises the following steps:

[0063] Step 1: Select a representative specimen from each sample and cut it into a square with a side length of 8cm×8cm or a circle with a diameter of 8cm as a specimen. Take 3 specimens respectively;

[0064] Step 2: Place the sample in a dry heat condition at 65°C for 10 minutes;

[0065] Step 3: Wash the three samples in step 1 according to the test condition A1M in GB / T 12490-2007. The specific operation of one cycle is as follows: add 10 steel balls to 150mL of solution, wash at 40℃ for 45min, take out the sample and wash it twice in 100mL of 40℃ water, each time for 1min. One cycle is equivalent to 5 washes. After reaching the specified number of washes, wash the sample thoroughly with water and dry it;

[0066] Step 4: Weigh 0.05 g of mite feed into a culture dish, and completely cover the square hole at the bottom of the culture dish with a PTFE membrane and stick it firmly;

[0067] Step 5: Place the test sample: Cover the test sample on the culture dish and use a glue gun to firmly adhere the edge of the culture dish and the test sample together;

[0068] Step 6: Place 2,000 live mites on the test fabric;

[0069] Step 7: Use a glue gun to firmly glue the edge of another culture dish and the test sample together, and use the PTFE membrane to completely cover the square hole at the bottom of the culture dish and firmly glue it;

[0070] Step 8: Place the above test device in a constant temperature and humidity incubator at a temperature of 25°C and a relative humidity of 75%;

[0071] Step 9: After 24 hours of incubation, observe with a dissecting microscope or stereo microscope and use appropriate methods to count the number of adult mites and nymphs in the sample culture dish B;

[0072] Step 10, result calculation: Calculate the mite blocking rate (%) according to formula (1). The test result is the average value of the three samples, rounded to the nearest digit, where:

[0073]

[0074] In the formula: M——mite prevention rate, %; M1——the number of mites in space B; M0——the initial number of mites in space A. Specific embodiment 3

[0076] A method for testing the mite-proof performance of household textiles comprises the following steps:

[0077] Step 1: Select a representative specimen from each sample and cut it into a square with a side length of 8cm×8cm or a circle with a diameter of 8cm as a specimen. Take 3 specimens respectively;

[0078] Step 2: Place the sample in dry heat at 70°C for 10 minutes;

[0079] Step 3: Wash the three samples in step 1 according to the test condition A1M in GB / T 12490-2007. The specific operation of one cycle is as follows: add 10 steel balls to 150mL of solution, wash at 40℃ for 45min, take out the sample and wash it twice in 100mL of 40℃ water, each time for 1min. One cycle is equivalent to 5 washes. After reaching the specified number of washes, wash the sample thoroughly with water and dry it;

[0080] Step 4: Weigh 0.05 g of mite feed into a culture dish, and completely cover the square hole at the bottom of the culture dish with a PTFE membrane and stick it firmly;

[0081] Step 5: Place the test sample: Cover the test sample on the culture dish and use a glue gun to firmly adhere the edge of the culture dish and the test sample together;

[0082] Step 6: Place 2,200 live mites on the test fabric;

[0083] Step 7: Use a glue gun to firmly glue the edge of another culture dish and the test sample together, and use the PTFE membrane to completely cover the square hole at the bottom of the culture dish and firmly glue it;

[0084] Step 8: Place the above test device in a constant temperature and humidity incubator at a temperature of 27°C and a relative humidity of 80%;

[0085] Step 9: After 24 hours of incubation, observe with a dissecting microscope or stereo microscope and use appropriate methods to count the number of adult mites and nymphs in the sample culture dish B;

[0086] Step 10, result calculation: Calculate the mite blocking rate (%) according to formula (1). The test result is the average value of the three samples, rounded to the nearest digit, where:

[0087]

[0088] In the formula: M——mite prevention rate, %; M1——the number of mites in space B; M0——the initial number of mites in space A.

[0089] The present invention evaluates the mite-blocking effect of the samples according to Table 1.

[0090] Table 1 Evaluation of mite-blocking effect

[0091] Mite resistance rate Description of anti-mite effect ≥95％ The sample has anti-mite effect ＜95％ The sample has no anti-mite effect

[0092] The present invention uses a barrier method to test and evaluate the anti-mite performance of household textiles, and is applicable to various types of household textiles that do not contain anti-mite additives, including fabrics and finished products, such as textile fabrics and finished products used in homes, hotels / restaurants, student dormitories, nursing homes, leisure places, transportation and other places.

Claims

1. A method for testing the mite-proof performance of household textiles, characterized in that: The steps include: Step 1: Select a representative specimen from each sample and cut it into a square with a side length of 8cm×8cm or a circle with a diameter of 8cm as a specimen. Take 3 specimens respectively; Step 2: Place the sample in dry heat at 65°C ± 5°C for 10 minutes; Step 3: Wash the three samples in step 1 according to the test condition A1M in GB / T 12490-2007. The specific operation of one cycle is as follows: add 10 steel balls to 150mL of solution, wash at 40℃ for 45min, take out the sample and wash it twice in 100mL of 40℃ water, each time for 1min. One cycle is equivalent to 5 washes. After reaching the specified number of washes, wash the sample thoroughly with water and dry it; Step 4: Weigh 0.05 g of mite feed into a culture dish, and completely cover the square hole at the bottom of the culture dish with a PTFE membrane and stick it firmly; Step 5: Place the test sample: Cover the test sample on the culture dish and use a glue gun to firmly adhere the edge of the culture dish and the test sample together; Step 6: Place 2000±200 live mites on the test fabric; Step 7: Use a glue gun to firmly glue the edge of another culture dish and the test sample together, and use the PTFE membrane to completely cover the square hole at the bottom of the culture dish and firmly glue it; Step 8. Place the above test device in a constant temperature and humidity incubator at a temperature of 25°C ± 2°C and a relative humidity of 75% ± 5%; Step 9: After 24 hours of incubation, observe with a dissecting microscope or stereo microscope and use appropriate methods to count the number of adult mites and nymphs in the sample culture dish B; Step 10, result calculation: Calculate the mite blocking rate (%) according to formula (1). The test result is the average value of the three samples, rounded to the nearest digit, where: In the formula: M——mite prevention rate, %; M1——the number of mites in space B; M0——the initial number of mites in space A.

2. The method for testing the mite-repellent performance of household textiles according to claim 1, characterized in that: The temperature range of the constant temperature and humidity incubator is 20°C to 40°C, with an accuracy of ±1°C; the humidity range is 70% to 90%, with an accuracy of ±5%.

3. The method for testing the mite-repellent performance of household textiles according to claim 1, characterized in that: The culture dish is made of plastic or glass, with a diameter of 58 mm and a height of 15 mm. The bottom is provided with a square hole of 20 mm×20 mm. The square hole is covered with a polytetrafluoroethylene (PTFE) membrane and firmly adhered.

4. The method for testing the mite-repellent performance of household textiles according to claim 1, characterized in that: The mite feed is powdered feed with a particle diameter of less than 0.1m and needs to be sterilized.

5. The method for testing the mite-repellent performance of household textiles according to claim 1, characterized in that: The mites are adult male or female dust mites or nymphs.

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