To keep the surface of the diaper drier, the water absorption speed and side leakage resistance of the diaper are also very important.
In February 2015, Consumer Report sent 7 brands of baby diapers such as Mommy Baby, Kao of Japan, Curiosity, Bangbaoshi, Besule, Anerle and Fawn Ding to a third-party authoritative testing agency, and used simulation experiments to test their water absorption speed, anti-side leakage effect, and lumping and fault performance.
The test results showed that Mommy Baby performed better in water absorption speed, anti-side leakage effect, and continuous layering of lumps; Besula was better in the performance of anti-side leakage effect and continuous layering of lumps, but its water absorption speed was slower.
<b>Mommy baby leak-proof effect is better</b>
"The speed of water absorption is very important to consumers, and during the process of urinating in the baby, if the diapers cannot absorb urine quickly, it is possible to leak urine." Absorption is slower, and your baby's skin is in contact with urine for too long, which may also cause damage to the skin. Zhu Yun, president of the Zhuhai Net Chamber of Commerce, who has many years of experience in the research of hygiene products, told the "Consumer Report" reporter.
The relevant person in charge of the R&D department of Bangbaoshi believes that the water absorption speed, dryness and comfort are in addition to the national standard, and the indicators of the water absorption performance of diapers from another angle are often used to measure whether product innovation is better.
In addition to testing the permeability of the national standard, this journal also used the method of simulated experiments to evaluate the absorption speed of diapers, the effect of preventing side leakage, and the situation of faults and lumps. This journal refers to the industry's water absorption speed test method, in order to simulate the real environment of the baby wearing diapers, the test is carried out under a certain pressure.
The evaluation results showed that with the increase of the number of simulated urine absorption, the water absorption rate of the diapers tended to slow down, the amount of side leakage also increased, and the phenomenon of faults and lumps became more obvious. Overall, Mommy Baby has better performance in terms of water absorption speed, anti-side leakage effect, and continuous performance of layering; Besula is better in the performance of anti-side leakage effect and continuous layering, but its water absorption speed is slower.
Specifically, in terms of water absorption speed, 7 products can be basically divided into 3 gradients, Mommy Baby, Fawn Ding, Curiosity performance is better; followed by Japanese Kao, An'erle, Bangbaoshi; poor is Besula. In terms of side leakage performance, the amount of side leakage when curiosity absorbs the first urine is more than other products, and other products perform better. After the second absorption of simulated urine, Mommy Baby and Bessola performed better, and the amount of side leakage was still very small.
In terms of fault and lump performance, Besula and Fawn Ding performed excellently, and there was no very obvious lumping and fault phenomenon after absorbing urine 3 times; and curiosity After the second absorption of simulated urine, the lumping and fault were more serious.
The engineer in charge of this test said that with the increase in the number of urine absorption, the rate of water absorption slower, the amount of side leakage increases, and the trend of severe faults and crucification is normal, because the absorption capacity of diapers is limited, and after exceeding the design capacity of the product, any product will leak urine.
The relevant person in charge of the R&D department of The Deer Dingding told reporters that this trend of change is mainly determined by the absorption properties of the material, and the water absorber in the same place cannot quickly divert the water to the place with strong absorption capacity after saturation, which will cause the leakage volume to increase when the second and third absorption of simulated urine is increased, and the absorption rate becomes slower. The materials and structures used in different diapers are different, and the specific performance will be different. However, the most important thing that diapers need to solve is the first bubble of urine.
"The effect of side leakage prevention depends on the overall grasp of factors such as the material and structure of the product's anti-side leakage side. The spread of urine can also affect leakage. The urine is spread as evenly as possible and more areas of the absorbing core are used efficiently, which reduces the risk of urinary leakage. Zhu Yun added.
"From the point of view of use, the liquid must disappear from the surface of the product as soon as possible to avoid leakage of urine. However, this requires the liquid to flow inside the core so that the liquid is distributed as evenly as possible to achieve the lowest possible amount of re-infiltration. Zang Tieyue, technical director of Bairun (China) Co., Ltd., a manufacturer of Besule diapers, further explained.
<b>The concept of "unaffordable layers" is controversial</b>
It is worth mentioning that local brands such as "Beshule" and "Deer Ding" mention the performance of "continuous layers and no lumps" in advertising campaigns, while brands such as Bangbaoshi and Kao do not emphasize this.
The person in charge of the R&D department of Fawn Ding Ding believes that "continuous layering, no lump" will improve the comfort of diapers a step further, although it is not within the scope of national standards, but the future product trend.
Guo Chuyu, director of operations of Hunan Muhe Brand Management Co., Ltd., which has been engaged in the maternal and infant products industry for many years, believes that "constantly failing to rise" can be regarded as a "pseudo-concept". Strictly speaking, "lumps and faults" cannot be called shortcomings.
He explained that easy lumping and faults are the result of poor mixing of wood pulp and water-absorbing resin, and a large amount of water absorption is easy to cause, and the general situation is that the amount of material is not enough or the mixing is uneven. This is rarely the case with qualified products in use.
"Faults and lumps are measured by lifting diapers up and shaking them when saturated and absorbing water. However, this situation does not occur in use, because babies generally roll and crawl before wearing pull-up pants, do not exercise vigorously, and rarely let faults appear because of squeezing. And to judge the lump, it is also necessary to emphasize the distinction between hard and soft crumbs. The hard lump is to indicate that the content of the absorbent resin is too high, and the mixing situation is not good, which is a design and product problem. And the soft lump has no effect on use at all, because it does not affect the baby's activity and use. Guo Chuyu added.
It is understood that the performance of "no lump, continuous layer" is closely related to the core material and structure used in diapers. At present, the core used in diapers on the market, its structure is basically divided into three kinds: one is the traditional core body (fluff pulp plus water-absorbent resin), its diversion effect is good, but it is easy to break, and the second is the composite core (dust-free paper plus non-woven fabric plus water-absorbent resin) is also called the full core, which has the characteristics of thinner, continuous layer, and no lump; there is also a kind of between the first two, that is, the thin composite core is laid under the fluffy pulp and water-absorbent resin, also known as the half core.
Guo Chuyu said that the industry generally does not think that the half-core is a mature technology, but an alternative to reduce costs, reduce the difficulty of the process, and maintain some characteristics of the whole core.
"The biggest selling point of the composite core is that it does not have a continuous layer, which is lighter and thinner, but its disadvantages are slower absorption speed and low equipment production speed. Domestic manufacturers will use this core more often, and foreign brands rarely use it. The reason is that it is difficult for early Chinese brands to compete with international first-line brands, so they cannot afford to take the ultra-thin products that are constantly layered as the entry point for differentiation, and have gradually been recognized by consumers. Zhu Yun further explained.