Method for evaluating fragrance retention effect of washing product

Abstract

The invention provides a method for evaluating a fragrance retention effect of a washing product, and relates to the technical field of test and analysis of physical and chemical properties of materials. The evaluation method comprises the following steps: washing a fabric by using a to-be-evaluated washing product, and sequentially rinsing, dewatering and drying after washing to obtain a washed fabric; preserving the washed fabric for X hours, and then carrying out artificial smelling evaluation to obtain the fragrance retention effect of the washing product to be evaluated; wherein the artificial sniffing evaluation is that when the number of the evaluation personnel sniffing the fragrance is not less than 80% of the total number of the evaluation personnel, it is judged that the fragrance is reserved. The method can accurately evaluate the fragrance retention effect of various washing products, the evaluation result is real and reliable, the repeatability is good, the reproducibility is strong, and the problem that the existing evaluation mode lacks credibility is solved.

Description

Technical Field

[0001] The invention relates to the technical field of testing and analyzing the physicochemical properties of materials, and in particular to a method for evaluating the fragrance retention effect of a washing product. Background Art

[0002] Following the Internet economy, the olfactory economy is another eye-catching emerging industry. The olfactory economy is an economic activity that relies on human olfactory perception to promote the sale of goods and the provision of services. Perfumes, aromatherapy, fragrance cleaning products, olfactory technology innovation products, etc. all belong to the category of olfactory economic products. Such products are commonly found in hotels, clubs, shopping malls, bank lobbies, airport waiting rooms, etc. With the help of many factors, the layout of the olfactory economy has accelerated. The olfactory economy is gradually becoming a new consumer track that is rapidly rising, and may become another new blue ocean for economic growth.

[0003] The detergent industry has actively walked at the forefront of the exploration of the olfactory economy. Detergents have gradually evolved from unscented products to scented products, and in recent years, a large number of products with long-lasting fragrance have emerged. For example, as one of the most widely used detergents by consumers, laundry detergents initially focused on their decontamination function, with less publicity for other functions. Later, scented laundry detergents gradually appeared in the market, making consumers feel happy after using them. In recent years, many dosage products have emerged in the detergent industry, such as: perfumed laundry detergent, fragrance beads, softeners, laundry gel beads, soaps, etc., which can retain fragrance for a long time after use, greatly improving consumers' mood in daily life and improving their quality of life.

[0004] At present, there is no standard method for evaluating the fragrance retention effect, and the evaluation effect lacks credibility, which to a certain extent restricts the effective evaluation of washing products. Not only can it not achieve the expected effect of the manufacturer's sales promotion, but it also cannot meet the use needs of consumers. The existing fragrance evaluation methods all evaluate by grading or scoring the fragrance intensity by evaluators, but due to the different personal preferences and subjective consciousness of evaluators, the final results lack authenticity.

[0005] In order to comprehensively evaluate the fragrance retention effect of common detergent products, it is imperative to further improve the evaluation method system of detergent products and establish an effective evaluation method. Summary of the invention

[0006] The object of the present invention is to provide a method for evaluating the fragrance retention effect of a washing product, so as to solve the problem that the existing method for evaluating the fragrance retention effect lacks credibility and the results are untrue.

[0007] In order to achieve the above-mentioned object of the invention, the present invention provides the following technical solutions:

[0008] The present invention provides a method for evaluating the fragrance retention effect of a washing product, comprising the following steps:

[0009] 1) Using the detergent to be evaluated to clean the fabric, and then rinsing, dehydrating and drying the fabric in sequence to obtain the cleaned fabric;

[0010] 2) After the washed fabric is stored for X hours, an artificial sniff evaluation is performed to obtain the fragrance retention effect of the washing product to be evaluated;

[0011] When the number of evaluators who smell the fragrance in the manual olfactory evaluation is not less than 80% of the total number of evaluators, it is judged that the fragrance is retained.

[0012] Preferably, the number of evaluators for the artificial olfactory evaluation is 6 to 60 persons, and their ages are 18 to 63 years old;

[0013] The method of sniffing in the artificial sniff evaluation is to place the fabric 0.5 to 5 cm below the nose and sniff it.

[0014] Preferably, the bath ratio during cleaning in step 1) is 1g:5-1000mL;

[0015] The mass concentration of the washing product in the washing is 0.001-5%.

[0016] Preferably, the cleaning temperature in step 1) is 15 to 40° C., and the cleaning time is 5 to 30 minutes;

[0017] Preferably, the volume of water used for a single rinse is 0.5 to 50 L, and the number of rinses is 2 to 4 times.

[0018] The cleaning methods in step 1) include mechanical cleaning and manual cleaning.

[0019] Preferably, the laundry products to be evaluated in step 1) include any one or more of laundry powder, laundry liquid, laundry beads, laundry tablets, softener, fragrance beads and soap.

[0020] Preferably, the artificial olfactory evaluation in step 2) is performed in a constant temperature and humidity environment, with a temperature of 20 to 30° C. and a humidity of 30 to 80% RH.

[0021] The present invention has at least the following beneficial effects:

[0022] Compared with the prior art, the present invention has the following advantages: the fragrance retention effects of various washing products can be accurately evaluated, the fabric selection is comprehensive, the cleaning equipment covers common types, the washing products cover common main products, the washing method conforms to the daily use habits of consumers, the multi-person evaluation method is reasonable, the evaluation results are true and reliable, the repeatability is good, and the reproducibility is strong, which has important application value for the performance evaluation of washing products. DETAILED DESCRIPTION

[0023] The present invention provides a method for evaluating the fragrance retention effect of a washing product, comprising the following steps:

[0024] 1) Using the detergent to be evaluated to clean the fabric, and then rinsing, dehydrating and drying the fabric in sequence to obtain the cleaned fabric;

[0025] 2) After the washed fabric is stored for X hours, an artificial sniff evaluation is performed to obtain the fragrance retention effect of the washing product to be evaluated;

[0026] When the number of evaluators who smell the fragrance in the manual olfactory evaluation is not less than 80% of the total number of evaluators, it is judged that the fragrance is retained.

[0027] In the present invention, the number of evaluators for the artificial olfactory evaluation is 6 to 60, preferably 10 to 50, more preferably 20 to 40, and more preferably 25 to 30; the age is 18 to 63 years old, preferably 20 to 50 years old, more preferably 23 to 40 years old, and more preferably 25 to 30 years old.

[0028] In the present invention, the olfactory requirements for the evaluator of the artificial olfactory evaluation are that the evaluator has no olfactory dysfunction, no special body odor, and can have normal perception of the tested odor.

[0029] In the present invention, the method of sniffing in the artificial sniff evaluation is to place the fabric 0.5 to 5 cm below the nose for sniffing, preferably 1 to 4 cm below the nose for sniffing, more preferably 1.5 to 3.5 cm below the nose for sniffing, and more preferably 2 to 3 cm below the nose for sniffing.

[0030] In the present invention, the material of the fabric includes cotton fabric, linen fabric, wool fabric, silk fabric, and fiber fabric.

[0031] In the present invention, the bath ratio during washing in step 1) is 1g:5-1000mL, preferably 1g:50-800mL, further preferably 1g:100-600mL, and more preferably 1g:150-400mL, where the bath ratio refers to the mass volume ratio of the fabric and the washing solution (the sum of the washing product and water).

[0032] In the present invention, the mass concentration of the washing product in the cleaning (mass concentration of the washing product in water) is 0.001-5%, preferably 0.008-4%, more preferably 0.1-3%, more preferably 0.2-2%, and even more preferably 0.5-1%.

[0033] In the present invention, the cleaning temperature in step 1) is 15-40°C, preferably 18-35°C, more preferably 20-30°C, and more preferably 25-28°C; the cleaning time is 5-30 min, preferably 10-25 min, and more preferably 15-20 min.

[0034] In the present invention, the volume of water used for single rinsing is 0.5-50 L, preferably 1-40 L, more preferably 3-30 L, and more preferably 6-20 L; the number of rinsing is 2-4 times, which can be selected as 2 times, 3 times or 4 times.

[0035] In the present invention, the cleaning methods in step 1) include mechanical cleaning and manual cleaning.

[0036] In the present invention, the washing products to be evaluated in step 1) include any one or more of washing powder, washing liquid, washing beads, washing tablets, softener, fragrance beads and soap.

[0037] In the present invention, the rinsing methods in step 1) include manual rinsing, household washing machine rinsing and rinser rinsing.

[0038] In the present invention, the dehydration method in step 1) is selected from spin drying, wringing or natural hanging and draining.

[0039] In the present invention, the drying method in step 1) is selected from hanging drying, shade drying or oven drying.

[0040] In the present invention, the artificial olfactory evaluation in step 2) is carried out in a constant temperature and humidity environment, the temperature is 20-30°C, preferably 22-28°C, more preferably 24-26°C, and more preferably 25°C; the humidity is 30-80% RH, preferably 35-70% RH, more preferably 40-60% RH, and more preferably 45-50% RH.

[0041] The technical solutions provided by the present invention are described in detail below in conjunction with the embodiments, but they should not be construed as limiting the protection scope of the present invention.

[0042] Example 1

[0043] Place a 60cm×60cm silk scarf (weight 30g) in a 10L basin containing 6L of deionized water; the water temperature is 25℃. After the silk scarf is soaked, apply 0.5g of commercial soap on its surface, with a soap concentration of 0.008% and a bath ratio of 1g:200mL. Rub it 20 times at a rate of 0.5 times / s, let it stand for 20s, repeat rubbing 5 times, and wash it for a total of 5min. Discard the washing water, rinse it with 3L of deionized water, rub it 20 times at a rate of 0.5 times / s, let it stand for 20s, and repeat rinsing 4 times. Wring out the water and dry it in a cool and dry place. Fold it into a square of 15cm×15cm and place it in an enamel tray for 48h at a temperature of 25℃ and a humidity of 60%RH. In an evaluation room with a temperature of 25℃ and a humidity of 60%RH, the fragrance retention effect is manually evaluated by smelling. 50 people were asked to evaluate the scarf. They placed it 3 cm below their nose and sniffed it. Those who could smell the fragrance were marked as "Y" and those who could not smell the fragrance were marked as "N". The test data were statistically analyzed and the results are shown in Table 1.

[0044] Table 1 Evaluation results of the fragrance retention effect of silk scarves hand-washed with soap

[0045]

[0046] A silk scarf washed by hand with soap will have no fragrance left after being left for 48 hours.

[0047] Example 2

[0048] Place a 150g linen shirt in a 5L glass beaker containing 3L tap water; the water temperature is 15℃. After the shirt is soaked, add 30g of laundry tablets, the concentration of commercially available laundry tablets is 1%, and the bath ratio is 1g:20mL. Use a polytetrafluoroethylene blade with a size of 50mm×20mm×8mm to stir at a rate of 1000 rpm for 10min. Discard the washing water, rinse with 2L tap water, stir at a rate of 1000 rpm for 2min, and repeat the rinse twice. Hang to dry. Staff without special body odor wear it normally for 6h,....... In the evaluation room with a temperature of 23℃ and a humidity of 70%RH, the evaluator randomly selects a certain part of the fabric (collar, cuffs, lapel, front chest, back, etc.) to smell and manually evaluate the fragrance retention effect. Ten people were asked to evaluate the shirts. They placed the shirts 5 cm below their noses and sniffed them. Those who could smell the fragrance were marked as "Y" and those who could not smell the fragrance were marked as "N". The evaluation results are shown in Table 2.

[0049] Table 2 Evaluation results of fragrance retention effect of linen shirts washed with laundry tablets under mechanical stirring

[0050]

[0051] A linen shirt machine washed with a laundry tablet will retain its fragrance after 6 hours of normal wear.

[0052] Example 3

[0053] A sweater with a mass of 4kg was placed in a household electric washing machine with a nominal weight of 10kg, and 40g of commercially available washing powder and 10g of commercially available fragrance beads were added. The washing water was tap water. The washing machine setting parameters were: the volume of tap water for washing was 50L, the washing temperature was 40℃, and the washing time was 30min; the number of rinses was 3 times, the volume of water for a single rinse was 15L, and the single rinse time was 3min; the drying temperature was set to 45℃ and the time was 180min. The bath ratio was 1g:12.5mL, the detergent concentration was 0.1%, and washing began. After washing, it was hung in a wardrobe at a temperature of 20℃ and a humidity of 50%RH for 72h. In an evaluation room at a temperature of 20℃ and a humidity of 50%RH, the fragrance retention effect of the collar, cuffs, lapel, front chest, back, etc. was manually evaluated by sniffing. 24 people were evaluated. They placed the sweater 0.5 cm below their nose and sniffed it. Those who could smell the fragrance were marked as "Y" and those who could not smell the fragrance were marked as "N". The evaluation results are shown in Table 3.

[0054] Table 3 Evaluation results of the fragrance retention effect of washing sweaters in a drum washing machine using a combination of laundry detergent and fragrance beads

[0055]

[0056]

[0057] Sweaters washed with detergent and fragrance beads in a drum washing machine still retain their fragrance after being left for 72 hours.

[0058] Example 4

[0059] Place a piece of pure cotton cloth with a total mass of 5g and a specification of 8cm×8cm in the vertical decontamination machine specified in GB / T 13174. The decontamination tank contains 1L of hard water with a temperature of 30℃ and a concentration of 250mg / kg. Add 1g of commercial laundry detergent and 1g of commercial softener, with a bath ratio of 1:200 and a detergent concentration of 0.2%. Set the stirring speed to 120r / min and the washing time to 20min. After washing, rinse with 1L of hard water, rinse for 5min each time, and repeat the operation twice. After rinsing, lay the cloth flat on an enamel tray and dry it in a cool and dry place. Store it in a plastic bag at 30℃, squeeze out the air and seal it. Take it out after 24h, and manually evaluate the fragrance retention effect by smelling it in an evaluation room with a temperature of 30℃ and a humidity of 30%RH. Fifteen evaluators placed the cotton piece 4 cm below their nose and sniffed it. Those who could smell the fragrance were marked as "Y" and those who could not smell the fragrance were marked as "N". The evaluation results are shown in Table 4.

[0060] Table 4 Evaluation results of fragrance retention effect of washing pure cotton fabrics with laundry detergent + softener combination in vertical decontamination machine

[0061]

[0062]

[0063] Pure cotton cloth washed in a vertical detergent using laundry detergent and softener still retains its fragrance after being placed in a plastic bag for 24 hours.

[0064] Example 5

[0065] A 6kg spandex fabric was placed in a nominally 8kg pulsator household electric washing machine, 20g of commercially available laundry beads were added, and tap water was used for washing. The washing machine setting parameters are: the volume of tap water for washing is 35L, the washing temperature is 20℃, and the washing time is 15min; the number of rinses is 2 times, the volume of water for a single rinse is 20L, and the single rinse time is 4min. The bath ratio is 1:5.8, the detergent concentration is 0.06%, and washing begins. After washing, hang it to dry, and then stack it in a wardrobe with a temperature of 25℃ and a humidity of 80%RH. Take it out after 3 months, and in the evaluation room with a temperature of 25℃ and a humidity of 80%RH, the evaluator randomly selects a certain part of the fabric (collar, cuffs, lapel, front chest, back, etc.) to smell and manually evaluate the fragrance retention effect. The evaluation was conducted by 36 people, who placed the spandex fabric 1.5 cm below their noses and sniffed it. Those who could smell the fragrance were marked as "Y" and those who could not smell the fragrance were marked as "N". The evaluation results are shown in Table 5.

[0066] Table 5 Test results of fragrance retention effect of washing spandex fabrics with laundry beads in a pulsator washing machine

[0067]

[0068]

[0069]

[0070] Spandex fabrics washed with laundry beads in a pulsator-type household electric washing machine still retain their fragrance after being stacked in a wardrobe for 3 months.

[0071] The above is only a preferred embodiment of the present invention. It should be pointed out that for ordinary technicians in this technical field, several improvements and modifications can be made without departing from the principle of the present invention. These improvements and modifications should also be regarded as the scope of protection of the present invention.

Claims

1. A method for evaluating the fragrance retention effect of a cleaning product, characterized in that: The following steps are involved: 1) Using the detergent to be evaluated to clean the fabric, and then rinsing, dehydrating and drying the fabric in sequence to obtain the cleaned fabric; 2) After the washed fabric is stored for X hours, an artificial sniff evaluation is performed to obtain the fragrance retention effect of the washing product to be evaluated; When the number of evaluators who smell the fragrance in the manual olfactory evaluation is not less than 80% of the total number of evaluators, it is judged that the fragrance is retained.

2. A method for evaluating the fragrance retention effect of a cleaning product according to claim 1, characterized in that: The number of evaluators for the artificial olfactory evaluation is 6 to 60, and their ages are 18 to 63 years old; The method of sniffing in the artificial sniff evaluation is to place the fabric 0.5 to 5 cm below the nose and sniff it.

3. A method for evaluating the fragrance retention effect of a cleaning product according to claim 1 or 2, characterized in that: The bath ratio of the cleaning in step 1) is 1g:5-1000mL; The mass concentration of the washing product in the washing is 0.001-5%.

4. A method for evaluating the fragrance retention effect of a cleaning product according to claim 3, characterized in that: The cleaning temperature in step 1) is 15-40°C and the cleaning time is 5-30 minutes; The volume of water used for a single rinse is 0.5 to 50 L, and the number of rinses is 2 to 4 times.

5. A method for evaluating the fragrance retention effect of a cleaning product according to claim 4, characterized in that: The cleaning methods in step 1) include mechanical cleaning and manual cleaning.

6. A method for evaluating the fragrance retention effect of a cleaning product according to claim 5, characterized in that: The washing products to be evaluated in step 1) include any one or more of washing powder, washing liquid, washing beads, washing tablets, softener, fragrance beads and soap.

7. A method for evaluating the fragrance retention effect of a cleaning product according to any one of claims 4 to 6, characterized in that: The artificial olfactory evaluation in step 2) is performed in a constant temperature and humidity environment, with a temperature of 20 to 30° C. and a humidity of 30 to 80% RH.

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