What are the factors that influence the anti-fog effect of stretch film?

What are the factors that influence the anti-fog effect of stretch film?

1. Deatomizer. Currently, the deatomizer used contains two kinds of deatomizer, fluorine 

deatomizer and silicon deatomizer. As the main additive to reduce the fog in the awning, it can effectively reduce the surface tension of water and play a key role in 

the thinning of the water layer in stretch film. With the development of production technology of stretch film, more and more enterprises in China use three-layer co-

extrusion equipment to produce stretch film, which plays a positive role in the rational allocation of resin varieties and better performance of additives. At present, 

most of the films with good performance in China are three-layer co-extrusion (ethylene/vinyl acetate) copolymer (E/VA) composite stretch film. It is also more 

reasonable to apply the spray in stretch film.

2 flow drops, is an indispensable agent in stretch film. When the spray drops and spray dispersants are combined 

properly, the effect can be fully developed. At present domestic flow drops has two categories, one is made up of amino non-ionic surfactants containing flow drops, 

the second is by polyol fatty acid ester compound with a nonionic surfactant, so its dripping properties can meet the use requirements, but with the synergy of 

antifogging agent is different. Antifogging agent, flow drops, such as resin, relievers - is a complex system, only with proper can achieve good fog dispersal, 

dripping state is also a good purpose, otherwise good often cause dripping, needless to fog or haze is good, not dripping. Flow drops are usually compound with 

content, due to the different nonionic surfactants which are cared for by both stretch film early flow condition and reasonable arrangement good late river flow drops 

condition and flow drop required duration. The application of different brands of dripping agents has a great impact on the anti-fogging performance, so the 

synergistic effect of the two is very important. It is not possible to produce a good stretch film with the cooperative relationship between the two. Weather 

conditions at the same time impact on the relationship between the two is very big also, different areas, different climate conditions, different crops using flow 

drops the varieties and dosage is different, and the various flow drops under different climate conditions in different regions, in theory, in practice has not made 

clear # #, so in the specific application one more unpredictable factors.

3. Sustained-release agent (insulation agent)

The pallet stretch film used in the relievers - such as 

talcum powder, kaolin, through the practice has proved these relievers - is effective for slow release and heat preservation function, and low prices, in the stretch 

film in the play the proper role. However, it is not enough to improve the drip condition and keep the high transparency of stretch film.

4 resin, stretch film using 

the resin with PVC, PE, ld, LLD, metallocene PE, PE and E/VAC resin are many brands, and stretch film used resin types and grades of cancellation has great effect on 

fog and dripping. Cleanliness and crystallization of different types of resin bagging, size is different, drop of flow distribution in the clean area, and migrated to 

plastic surface, and cleanliness, crystal morphology and size of convection drops of the impact of migration status is very different. The droplet agent cannot exist 

in the crystal, the resin has high crystallinity, and the amorphous area is small, which inevitably leads to a small amount of droplet in the amorphous area, and the 

added droplet will precipitate out and cause frosting. Crystal morphology, spherulite size convection drops will affect migration velocity, such as PE - LLD crystals 

are usually cylindrical, convection have influence on the migration velocity drops, resistance is larger, and the crystal of metallocene PE of spherulite and smaller 

in diameter. The crystallinity is moderate, the resistance is small, and the effect on the migration of the drops is small. The compatibility of resin and flow drops 

is also very important, because the resin of different varieties and different polarity, and the compatibility of flow drops is different also, from the scanning 

electron microscope (sem) as you can see, the real work flow drops was part of the membrane surface, has nothing to do with the number of internal flow drops, internal 

flow drops have the effect of supplement. The experimental results show that the droplets must reach a certain concentration in order to be effective. The 

compatibility is too good, and the flow drops are like the plastic surface migration is not enough, and the surface flow drops are too few to form a hydrophilic layer 

or uneven distribution on the plastic surface, which is easy to make the flow drops effective.