Blown film category I: mulch film
Degradable mulch film applicability:
1. Applicable to existing agricultural machinery operations
2. The degradation period meets the agronomic requirements of the whole growth period of crops
3. The thermal insulation and moisture retention performance is equivalent to the use of ordinary film
4. There is no need for recycling or other processing in the whole life cycle, and it does not affect subsequent farming
5, will not cause secondary pollution (visual pollution or change the physical and chemical properties of soil
5. The yield per mu is equivalent to the use of general film
6. The price is reasonable, and the cost of plant protection does not increase significantly under the same effect
Blown film category II: hygiene product packaging, packaging bags, film bags, gloves, plastic wrap, bags
1. The inside and the outside are different. Double-layer co-extrusion films are used, such as pure milk bags, express bags, metal protective films, and hard objects in express bags or various factors cause them to be easily broken. When extruding the film, there are two heads extruding the black film and the white film at the same time, and the film is still semi-bonded together, without the use of chemicals such as glue to bond.
2. Different colors inside and outside: double-layer co-extrusion process, printing coverage
3. The seal of the express bag is normally 5CM, super glue, and the glue width is 0.8-1CM
Precautions:
1. Material: PLA+PBAT+25% calcium powder (process water cooling) or PLA+PBAT+25% starch (process air cooling), the two modified production lines are different
2. Non-food contact, good bearing capacity; no choice of MD (calcium carbonate or talc) filling
3. Whether the contact sheet is easy to be stretched: the filling is ST (corn starch)
4. The density of calcium carbonate is higher than that of starch, so the gram weight of the same specification will be heavier, but the price of starch is more expensive than that of calcium carbonate, so the cost is not much different The thinnest film bag is 3 filaments, and the thinnest zipper bag and zipper type should be 6 filaments. The film bag is too long or too narrow to cut the bag
