In the flexible packaging sector, extrusion technology is the heart of the production process. It is at this stage that the raw material is transformed into a logistical and protective solution. However, today's market demands a quantum leap: it's no longer enough for packaging to be technically high-performance; it must be intrinsically sustainable.<\/p>\n
In this scenario, the solutions monomaterial in LDPE<\/b> (Low-density polyethylene) has established itself as the new benchmark. Designing packaging using a single polymer allows for production efficiency, product protection, and, above all, true and simplified recyclability.<\/p>\nThe LDPE extrusion process: precision and technology<\/h3>\n
Extrusion is a continuous thermomechanical process that transforms polymer granules into a thin, resistant plastic film, used for the production of industrial reels, bags, and pouches. To achieve an excellent product, the process must be monitored with extreme precision at every stage.<\/p>\n
The LDPE granules are fed into a hopper and conveyed into the extruder. Here, a worm screw pushes the material through temperature-controlled zones. During this stage, the polymer is:<\/p>\n
Heated<\/b> up to the optimum melting point.<\/p>\n<\/li>\n Plasticized<\/b> to eliminate any discontinuity.<\/p>\n<\/li>\n Made homogeneous<\/b>, ensuring that the mechanical properties are constant across the entire surface of the future film.<\/p>\n<\/li>\n<\/ul>\n The molten polymer is forced through a circular die<\/b>. In the case of Teamplast solutions, the use of dies specifically designed for the single material ensures that the film maintains a uniform atomic structure. The quality of the die determines critical variables such as:<\/p>\n The constancy of the thickness<\/b> (micro-framing).<\/p>\n<\/li>\n There resistence<\/b> to traction and drilling.<\/p>\n<\/li>\n THE'\u2019uniformity<\/b> optics and structure of the material.<\/p>\n<\/li>\n<\/ul>\n At the exit of the die, the blown air expands the material, creating a "bubble" that develops vertically. This phase is technically defined as biaxial orientation<\/i>: the material is stretched both longitudinally and transversally. This process:<\/p>\n Stabilizes the molecular structure of LDPE.<\/p>\n<\/li>\n Defines the elastic and barrier properties.<\/p>\n<\/li>\n It allows the film to cool gradually before being wound onto reels.<\/p>\n<\/li>\n<\/ul>\n For decades, the packaging industry has made extensive use of structures multilayer<\/b>, combining different polymers (such as PE, PET, and PP) to combine their properties. Although effective in protection, these materials have an insurmountable limitation: the difficulty of recycling<\/b>.<\/p>\n Multilayered materials are complex, if not impossible, to separate mechanically. Consequently, much of this packaging ends up in waste-to-energy plants or landfills, disrupting the circular economy.<\/p>\n Switching to an all-LDPE structure offers advantages that positively impact the entire supply chain:<\/p>\n Total and simplified recyclability:<\/b> A film composed of a single polymer is easily identified by optical scanners in sorting plants. It can be ground and regenerated into new granules without undergoing degradation due to contamination from other materials.<\/p>\n<\/li>\n Recovery of secondary raw materials:<\/b> The single-material allows production waste to be reintroduced directly into the production cycle, reducing dependence on virgin polymer derived from fossil sources.<\/p>\n<\/li>\n Logistics simplification:<\/b> Managing a single material reduces the complexity of laboratory testing and ensures greater predictability of packaging behavior during the sealing and automatic packaging phases.<\/p>\n<\/li>\n<\/ol>\n A myth that needs to be dispelled is that single-material solutions perform less well than laminated solutions. Thanks to technological innovation in extrusion lines, it's now possible to produce LDPE films with excellent characteristics:<\/p>\n Superior mechanical resistance:<\/b> Ideal for heavy industrial packaging.<\/p>\n<\/li>\n High weldability:<\/b> Essential for ensuring the airtightness of bags on high-speed packaging lines.<\/p>\n<\/li>\n Transparency and brilliance:<\/b> To enhance the aesthetics of the contained product.<\/p>\n<\/li>\n Workability:<\/b> Film flows smoothly through automatic machines, reducing downtime and waste.<\/p>\n<\/li>\n<\/ul>\n For Teamplast, the extrusion phase is not just a physical transformation of the material, but the practical act through which the company's environmental responsibility is realized. Choosing a single material means adopting the principles of Design for Recycling<\/b>: design packaging by considering the moment when it will cease to be useful and will have to return to being a resource.<\/p>\n2. The passage through the die: the heart of the monomaterial<\/h3>\n
\n
3. \u201cBlown Film\u201d technology (bubble extrusion)<\/h3>\n
\n
Why monomaterial represents the real ecological breakthrough<\/h3>\n
The technical and environmental advantages of monomaterial LDPE<\/h3>\n
\n
Uncompromising performance: the challenge won by Teamplast<\/h3>\n
\n
Conclusion: designing tomorrow's recycling today<\/h3>\n