how to solve the pellets making machine production granulation smell:
1 more miscellaneous materials
The 2 Materials multiple processing degradation
3 material decomposition of small molecules in the material.
4 sometimes water and some material from the accelerated degradation. Above more attention to the processing temperature is not too high.
Granulation dryer illustrate,
Causes of PET bottled drinking water odor problems
PET bottled drinking water odor problems gradually attracted the attention of consumers, although it does not affect the health and health, but still need to
produce enough emphasis on terminal enterprise manufacturing enterprises, logistics and sales.
PET bottled water is covered by water, PET bottles and plastic. Water, colorless, odorless, slightly odor constituents dissolved which will produce an
unpleasant taste when drinking.
PET bottles, the use of food grade PET material manufacturing. PET material, learning called polyethylene, polyethylene terephthalate, colorless, at room
temperature under tasteless, large-scale use in the beverage, food, cooking oil field.
The plastic cover, typically use food grade HDPE material manufacturing. The school called high-density polyethylene, colorless, tasteless room temperature,
large-scale use in the beverage, food, cooking oil field.
Then, the smell of the water coming from? After a lot of research and testing, concluded: the smell of the water from the packaging material to the main
The packaging material itself taste despite the packaging material at room temperature and tasteless, but in the case of a long higher than 38 ° C, the
small molecules in the packaging material is easy to volatilize odor, migrate into the water, odors.
Made of a polymer composed of PET material and the HDPE material is very sensitive to the temperature, typically, the higher the temperature, the greater the
odor. As the polymer residues in the part of the low molecular substances, at high temperature, its volatile odor greater than the polymer. To avoid
transport and storage under high temperature conditions, and effectively avoid the generation of odor.
UV irradiation, the part of the low-molecular-weight substances are decomposed, and odors.
Packaging material has been added to the anti-UV substance, but under the exposure conditions, the polymer remaining in the group of substances of low
molecular weight chain terminal portion, can easily be activated to produce small amounts of degradation products, was dissolved in water to produce an odor.
If you add to the high temperature, the smell is more pronounced. Should avoid direct sunlight, transport and storage, suitable temperature can effectively
avoid the generation of odor.
The caps raw material degradation of additives
Plus lubricant in order to improve the the cap opening performance, and the convenience of consumers to drink; Canadian release agent, in order to
successfully weaned from the system covered mold; plus masterbatch, change the color of the cover, so that the appearance of the product diversification.
These additives typically contain an unsaturated fatty acid amide, wherein the double bond C = C structure is easy to be oxidized. If exposed to ultraviolet
light, heat and ozone which the double bond can be opened, forming a mixture of degradation: saturated and non-saturated fatty acid, acetaldehyde, carboxylic
acid and hydroxide, etc., they are very easy to integrate into the water, resulting in different taste and odor.
Selection and production process to match the additive effective avoid volatilization odor mixture produces.
System covered the residual odor
System cover materials used in adding additives such as lubricants. System covered include heating and high-speed mechanical mixing processes. Due to the
machining process will produce the odor, and the residue in the lid, will eventually migrate to the water.
System covered, usually there are two processes: injection molding, compression molding.
The injection molding process: the injection mechanism cover, is the traditional way. Must use the additive, the temperature at 240 ° C; 280 ° C high
temperature, the material will produce some of the chemical changes of odors.
Compression molding process: the mechanism of compression molding cover in recent years, the emergence of new technology, you can not have outside than
masterbatch additives, processing temperature controlled at 160 ° C to -170 ° C, will not make the material to produce chemical changes.
An effective way to reduce odor system covered the material as little as possible with additives to reduce the processing temperature. Many international
well-known enterprise system covered by compression molding process, they think this is the effective force method.