The film blowing machine is a device that produces plastic film through extrusion and inflation molding processes. It is widely used in the manufacture of various functional films. The following describes its application scenarios from different fields.

1. Packaging industry

1.1 Project background: Food, daily necessities, industrial products, etc. require lightweight, moisture-proof, and durable plastic packaging films, such as shopping bags, cling film, composite packaging substrates, etc.

1.2 Solution: The film blowing machine produces polyethylene (PE) and polypropylene (PP) films of different thicknesses (0.01~0.2mm) and performance (antistatic, high transparency) by adjusting the extrusion temperature, air ring cooling system, and traction speed.

1.3 Application case: A food packaging company uses a three-layer co-extrusion film blowing machine to produce high-barrier composite films for vacuum packaging of meat products to extend the shelf life.

1.4 Advantages of film blowing machines: It can continuously produce wide-width films (width of more than 3 meters), with a thickness uniformity error of ≤±5%, and supports online addition of functional additives (such as antibacterial agents).

1.5 Future development: Develop a special film blowing unit for degradable materials (such as PLA/PBAT) to adapt to the trend of environmentally friendly packaging; integrate AI to monitor the stability of film bubbles in real time and reduce the film breakage rate.

2. Agricultural field

2.1 Project background: Agricultural films need to have anti-ultraviolet, heat preservation, anti-fog and other characteristics, and are used in greenhouse covering, ground film and other fields.

2.2 Solution: Use multi-layer co-extrusion blown film technology, add UV stabilizer to the outer layer, and compound anti-fog masterbatch in the inner layer to achieve integrated production of functional agricultural films.

2.3 Application case: An agricultural technology company produces 5-layer co-extruded PO agricultural films with a light transmittance of ≥90% and a service life of more than 3 years for plateau vegetable planting.

2.4 Advantages of film blowing machines: Support the production of ultra-wide films (8~12 meters) to meet the needs of large multi-span greenhouses; can customize parameters such as infrared blocking rate

2.5 Future development: Combined with intelligent temperature control systems, produce light conversion films (such as converting blue light to promote photosynthesis); develop special film blowing processes for recyclable agricultural films.

3. Medical industry

3.1 Project background: Medical protective clothing, infusion bags and other products require sterile, high-strength medical-grade plastic films.

3.2 Solution: The film blowing machine is operated in a clean workshop, using medical-grade LLDPE raw materials, and the film biocompatibility is ensured through ultra-clean filtration system and online corona treatment.

3.3 Application case: A medical device factory uses a film blowing machine to produce 0.05mm thick dialysis membranes, with porosity precisely controlled at 30~50nm, for hemodialysis equipment.

3.4 Advantages of film blowing machines: Meet GMP standards, no precipitate pollution; support continuous production of ultra-thin films (<0.02mm), elongation at break ≥500%.

3.5 Future development: Research and develop antibacterial/antiviral functional medical films, and integrate online gamma ray sterilization modules.

4. Construction field

4.1 Project background: Building moisture-proof membranes, geomembranes, etc. require high strength and weather resistance, and are used in roof waterproofing, foundation isolation and other scenarios.

4.2 Solution: The film blowing machine uses high-density polyethylene (HDPE) raw materials, and produces puncture-resistant and aging-resistant thick films (0.5~3mm) through enhanced screw design and multi-layer superposition process.

4.3 Application case: An engineering company uses a film blowing machine to make 2mm thick HDPE geomembrane for landfill anti-leakage layer, with a tensile strength of more than 25MPa.

4.4 Advantages of film blowing machine: Supports high melt index raw material processing, production efficiency reaches 200kg/h; carbon black masterbatch can be added to improve UV resistance.

4.5 Future development: Develop self-healing geomembranes with embedded microcapsule repair agents, and automatically heal cracks; produce high reflectivity films in combination with photovoltaic backplane requirements.

5. Environmentally friendly materials field

5.1 Project background: The demand for degradable films and bio-based materials is growing, and the film blowing process needs to be adapted to new environmentally friendly materials.

5.2 Solution: Transform the temperature control system of the traditional film blowing machine and adopt low-temperature extrusion technology (≤160℃) to avoid degradation of heat-sensitive materials such as PLA and PHA.

5.3 Application case: An environmental protection enterprise uses a film blowing machine to produce PBAT/starch blended film, with a natural degradation rate of 90% in 180 days, which is used in the production of express bags.

5.4 Advantages of film blowing machine: The screw material is upgraded to a corrosion-resistant dual alloy to adapt to acidic bio-based raw materials; a vacuum sizing device is configured to improve the surface flatness of the film.

5.5 Future development: Develop a film blowing process for carbon dioxide-based plastics (such as PPC) to achieve carbon negative emissions; link with chemical recycling equipment to directly process waste plastics for recycling and granulation.