01, why do diapers use hot glue?
The production process of diapers is a more complex combination process, by surface non-woven fabric, absorbent core body, PE composite bottom film, magic buckle and front waist paste, anti-leakage non-woven fabric, rubber tendons and many other materials combination, and the combination of all the above materials through hot melt adhesive bonding, this is the current production process of all diapers. It can be seen that the normal production process of diapers will have the existence of "hot glue".
As treasure mothers, we sometimes find some yellow glue on the back or surface of diapers used by babies. When we are not very experienced, we seem to think this is strange. Is there a problem with the product quality? Can the diaper with the gelatinous substance still be used? Is it harmful to the baby?
02, how do the drops of glue on the diaper come from?
In the process of using hot melt glue, we need to use glue machine equipment, there are two ways of gluing, one is spray glue, the other is scraping glue, these two ways use the spray gun and scraping gun, spray gun is to use several holes in the spiral to play the gas with a set air pressure, glue out of the glue hole surrounded in the middle of the pore into a spiral spray on the surface of the composite material, The material is then firmly bonded together by a series of press rollers. Some brands of diapers often give customers complaints about some yellow glue on the back or surface of the product, known in the industry as dripping glue.
03. Can glue drop be avoided?
The formation of glue drops is due to the blockage of the spiral pores in the production process. After the glue is pressed out from the pipeline, it is not affected by the spiral gas and condenses into lumps of glue drops on the product within a certain time. This probability is very small, can be used to calculate the probability of ten million or even a few million, but because the glue just drops on the product is white, with the product surface can not form an effective color difference, so now some large factories used in the advanced stain visual detection system can not be 100 percent out. Therefore, the current level of technology in the industry can not avoid the formation of drip glue.
Since glue drops are unavoidable at present, what I care about as a treasure mother is the appearance of these yellow glue. If it comes into contact with the baby's tender skin, will it cause harm to the baby? Can you use it safely?
04, hot melt adhesive smell pungent?
The smell of hot melt glue comes from hot melt glue itself, is the essential characteristic of hot melt glue, affected by raw materials, production process and circulation link. Hot melt collagen material consists of main resin, sticky tree finger, diluent or softening oil, filler and other components. The inherent smell of raw materials is an important source of hot melt adhesive smell. For example, most EVA has a slight acetic acid smell, while synthetic rubber also has its own taste, but the intensity is different. And C9C5 resin has their different taste, even all hydrogenated resin, also has its own taste, but our sense of smell may not be able to detect it, other raw materials also have more smell, but different intensity. In the production process, hot melt adhesive may also have new odor sources, which can be reduced by controlling the production process. In the logistics of hot melt glue, it may also be contaminated with new odors. But in general, hot glue itself contains a slight smell is not toxic.
05, drop glue is harmful to the baby?
Does dripping glue harm the human body? As can be seen from the first point above, hot melt adhesive is non-toxic, odorless, environmental protection chemical products, its physical state changes with the change of temperature. Therefore, when hot melt glue is used in the production of diapers, the drip glue formed belongs to the production defect and the after-sales scope of the product, but it will not cause any harm to human body. So you treasure mother can rest assured to use.
