Package Research Articles

The Influence of the Type and Concentration of Plasticizer on the Properties of Biopolymer Films based on Wild Flax (Camelina Sativa)

The development of biodegradable packaging materials using naturally occurring, renewable biopolymers has gained attraction due to consumer demand for high-quality products and concerns about environmental waste problems. However, the inferior mechanical properties and low water resistance of packaging materials based on natural polymers pose a significant obstacle to their wider use. One of the ways to improve the properties of biopolymer-based packaging materials is the addition of plasticizers during their synthesis. In this work, the influence of the type and concentration of plasticizer on the properties of new biopolymer films based on wild flax (Camelina sativa) was investigated. Camelina sativa oil cake (CSoC) remains after edible oil cold pressing as a by-product. One of the possibilities for its valorization is the synthesis of biopolymer materials. During the synthesis, different plasticizers - glycerol and polyethylene glycol 400 - were added in different concentrations - 20%-60%. The obtained CSoC-based biopolymer films were analyzed for the following properties: Moisture content, solubility, thickness, tensile strength, elongation at break, and water vapor permeability. The results obtained showed significant differences when different plasticizers were applied at different concentrations. The biopolymer film with optimal properties was obtained by adding glycerol at a concentration of 40%.

Marketing Harm to Children: Children’s exposure to unhealthy commodity marketing using body cameras

Abstract Background Sophisticated, persuasive and extensive product marketing is a key driver of unhealthy commodity (UHC) consumption. This study aims to identify the nature and extent of children’s exposure to UHC marketing. Methods The study is a secondary analysis of Kids’Cam, a cross-sectional study in which 168 New Zealand 12-year-old children wore body cameras that automatically captured images of their environment every 7 seconds over four days. Images were analysed for exposure to UHC, Healthy and ‘Other’ marketing. Results Children were exposed to UHC marketing on average 76.2 times/day, nearly 2.5 times their daily exposure to ‘Healthy’ marketing. Exposure included: unhealthy food marketing (68.4/day), alcohol (5.7/day), gambling (2.1/day) and tobacco marketing (0.1/day). These exposure rates align with the level of statutory regulation each UHC faces in NZ. Food outlets were the most common setting for UHC marketing exposures, while product packaging was the most common medium. Coca-Cola (6.3/day) was the most common UHC exposure, followed by Cadbury, Tip Top, Bluebird and Powerade. Over half of children’s unhealthy food (54.9%) and alcohol (51.9%) marketing exposures were attributed to multinational corporations. In contrast, statutory bodies are responsible for almost all (97.4%) of children’s gambling marketing exposure. Conclusions Children currently grow up in an environment in which they are constantly persuaded to consume products that directly harm their health - an environment in which the profits of corporations are favoured over public health. Statutory regulation of UHC marketing is urgently needed to protect children from harm. Key messages • Children were exposed to unhealthy commodity marketing on average 76.2 times/day, nearly 2.5 times their daily exposure to ‘healthy’ marketing. • Statutory regulation of unhealthy commodity marketing is urgently needed to protect children from harm.

PROMOTION STRATEGY THROUGH TIKTOK CONTENT DEVELOPMENT USING THE ADOBE PREMIERE PRO APPLICATION TO INCREASE BRAND AWARENESS IN MSME SILVIA SALON PUSPASARI BOGOR REGENCY

The promotional strategy used by Silvia Salon Puspasari via Tiktok social media did not work optimally because the results of the uploaded videos were not optimum enough because the video quality is still not clear and unstable, which affects the upload results on Tiktok. As a result, the insight into Silvia Salon Puspasari's Tiktok account was unstable. The aim of this research was to create Tiktok content using the Adobe Premiere Pro application as promotional media. This research used the action research method. Measurement effectiveness of packaging design as promotional media using the EPIC Model method. There were 15 respondents, namely 2 marketing experts, 2 computer experts, 1 owner, and 10 consumers or potential consumers. This analysis went through 2 cycles. Based on the results of the analysis of questionnaire distribution, the first cycle still showed quite effective content. In cycle II, an EPIC Rate score of 4.6 was obtained, which means it was very effective. From this research it can be concluded that Tiktok content is said effective and suitable for use as a promotional strategy to increase brand awareness at MSME Silvia Salon Puspasari.

Properties of Antioxidant Film Based on Protein Isolate and Seed Coat Extract from Bambara Groundnut

Bambara groundnut (BG)-based films containing seed coat extract at different concentrations were prepared and characterized. BG seed coat extract (BGSCE) had a total phenolic content of 708.38 mg GAE/g dry extract. BGSCE majorly consisted of quercetin 3-galactoside, rutin, and azaleatin 3-arabinoside. BGSCE exhibited ABTS and DPPH radical scavenging activities (ABTS-RSAs and DPPH-RSAs), a ferric reducing antioxidant power (FRAP), and an oxygen radical absorbance capacity (ORAC) of 66.44, 4.98, 4.42, and 0.91 mmol Trolox equivalent/g dry extract, respectively. When BGSCE at various concentrations (0–8%, w/w, protein content) was incorporated into the BG protein isolate (BG-PI)-based films, film containing 4% BGSCE exhibited higher thickness, tensile strength, elongation at break, water vapor and UV-light barrier properties, and a*-value (redness) than the control film (p < 0.05). Films containing BGSCE had greater ABTS-RSA, FRAP, and ORAC than the control film (p < 0.05). An FTIR analysis elucidated that the proteins interacted with phenolic compounds in BGSCE. Nonetheless, less thermal stability was attained in films added with BGSCE. Hence, the addition of BGSCE possessing antioxidant activity exhibited an important role in properties and characteristics of BG-PI-based film. The developed active film could be applied as packaging material possessing antioxidant property for food applications.

Metal–organic frameworks (MOFs)-based materials in food packaging: a review

Metal–organic frameworks (MOFs)-based materials in food packaging: a review

Poly (Butylene Adipate‐Co‐Terephthalate) (PBAT) – Based Biocomposites: A Comprehensive Review

AbstractWith the issue of plastic waste persisting and the need for more sustainable solutions to the ever‐increasing demand for lightweight and durable plastic products, this review has become imminent and compelling. Poly (butylene adipate‐co‐terephthalate) (PBAT) is a biodegradable polymer with exceptional film‐forming ability resembling those of low‐density polyethylene. PBAT has a huge advantage for packaging applications due to its remarkably high elongation at break, giving it a good processing window for its application in packaging. However, certain defiant intrinsic properties stand in the way of its full commercialization. The development of blends and biocomposites of PBAT has, therefore, become imperative for complementing its properties and producing a superior material. This paper focuses on the recent developments in preparing PBAT‐based blends and biocomposites with superior mechanical, barrier, and antimicrobial properties and, most importantly, has also investigated how the development of these blends and biocomposites impacts the biodegradation rate of PBAT. It also highlights the possible synthesis of bio‐based PBAT and the commercialization, market trends, and prospects of PBAT‐based materials for flexible, rigid packaging, and other industrial applications compared with biodegradable alternatives.

Evaluation of asphalt mixtures modified with polyethylene terephthalate (PET)

Polyethylene terephthalate (PET) waste, ubiquitous in packaging and shipping industries, offers logistical advantages through its lightweight, durable nature, fostering cost-effective transportation. However, concerns over PET’s environmental impact arise from its persistence in ecosystems and contribution to pollution, urging industries to prioritize responsible waste management and recycling strategies. Recognizing the pivotal role of the construction industry, leveraging PET recycling in asphalt mixtures presents an applicable solution to curtail the environmental footprint of PET waste. Roadway asphalt construction, a significant industry, holds substantial potential to integrate PET waste into asphalt, offering a promising avenue for sustainable waste utilization. This research investigates the integration of PET waste into Egyptian asphalt mixtures across nine distinct compositions, varying binder percentages (3.0%, 3.50%, and 4%) and PET ratios (6%, 7%, and 8%). Marshall and Hamburg Wheel Rutting tests were conducted, comparing these formulations against a control mix devoid of PET. Notably, optimal outcomes emerged from the 3% binder with 8% PET combination, exhibiting enhanced mix stability and stiffness while meeting established mix design standards, signifying promising improvements in sustainability without compromising performance metrics.

Digital Marketing Optimization Based on 9 Core of Marketing Strategies to Support Go-Digital Herbal MSMEs and Export Markets in Utilizing the Potential of the Madiun Regency Region

Herbal Academy Group Indonesia, an MSME in Madiun, has proliferated since 2014 with herbal products that are beneficial for health. After BPOM tests and halal certification, they faced marketing and export challenges. The author proposes digital marketing optimization to increase market reach and export readiness, involving students in this activity as part of community service. This service aims to evaluate essential aspects in the digital marketing of herbal MSMEs in Madiun, including product quality, packaging, branding, and SEO, to support go-digital and export market expansion. The results of the assessment show that several areas need improvement. Solutions include digital marketing assistance and export certification to optimize global market potential. Implementing the service involves eight months of technical assistance in digital marketing and export. This service involves three stages of validation tests: material, media, and platform. The validation of the material showed an excellent assessment with an average of 84.33%, indicating that the material was relevant and precise. Media tests were also positive, scoring the highest strategy suitability and content authenticity scores. The platform's validation received excellent ratings in all aspects, including appearance, features, and regulatory compliance, with an average of 93.33%, indicating the platform's effectiveness in supporting Herbal MSMEs in Madiun. The application of technology and innovation for Herbal MSMEs in Madiun Regency. It covers digital marketing, SEO, e-commerce, and export technologies, including SCM tools and international databases.

Designing biodegradable and antibacterial cellulose-based superhydrophobic packaging materials via large-scale self-assembly

Designing biodegradable and antibacterial cellulose-based superhydrophobic packaging materials via large-scale self-assembly

Anti-pathogenic and probiotic-friendly effect of benzyloxy pyridine derivative impregnated into bacterial cellulose matrix

Bacterial cellulose (BC) has emerged as a promising biomaterial for biomedical applications due to its unique properties. In this study, firstly, the potential of BC as a carrier material for the originally synthesized benzyloxy pyridine derivative (BeOxP), and also an antimicrobial and probiotic bacteria-friendly (on Lactiplantibacillus plantarum 299v (LP299V®) (DSM 9843)) effect of BC- BeOxP was investigated. The BC- BeOxP composite material was developed using a simple and efficient method, ensuring the uniform dispersion of BeOxP within the BC matrix. Characterization of BeOxP has been carried out with High-Resolution Mass Spectroscopy (HRMS) and Nuclear Magnetic Resonance (NMR). Additionally, BC- BeOxP was characterized by Thermogravimetric analysis (TGA), Differential thermal analysis (DTA), Scanning Electron Microscopy (SEM), Texture analysis, and Fourier-transform infrared spectroscopy (FTIR), confirming the successful integration of BeOxP without compromising the structural integrity of BC. The mechanical properties of the BC- BeOxP composites were also evaluated to ensure their suitability for drug-carrying or food-packaging applications. Antimicrobial activity of the BC- BeOxP was analyzed against Staphylococcus aureus ATCC 29213 and Escherichia coli ATCC 25922 while the probiotic-friendly effect was tested on Lactiplantibacillus plantarum 299v (LP299V®) (DSM 9843). The findings open avenues for further research of BC-based drug carriers or packaging materials for advanced biomedical applications.

Effects of Packaging on Consumer Buying Decision: A Study of African Black Soap (Alata Samina)

Product packaging plays a key role in consumer purchasing decision as packaging promote brand identity and customer loyalty. However, the African black soap prepared in Ghana has not seen the best of packaging, hence, its rejection in international marketplace. It is in this vein that the researcher sought to examine effect of packaging on consumer buying decision of African black soap (Alata Samina). Correlation and cross-sectional design were used. Cluster and simple random were used to select 245 respondents. Findings revealed that best packaging influence consumers’ perception to buy local Alata Samina soap recorded a cumulative mean of 4.69198 and standard deviation of 3.31842, suggesting respondents’ agreement that best packaging induce consumer buying decision. In terms of relationship, it was clear that strong positive link exist between packaging elements and consumer buying decision; Packaging colour had r(245) = 0.882, p<0.05, Background image had r(245) = 0.881, p<0.05, Packaging materials had r(245) = 0.882, p<0.05, Font style had r(245) = 0.876, p<0.05. Printed information had r(245) = 0.772, p<0.05, Labelling, wrapper design and creativity had r(245) = 0.882, p<0.05. Standard Multiple Regression was used to analyzed the effect of packaging elements on consumer buying decision and the result were packaging colour had 53.8% and statistically significant effect of r(245) = 0.538, p<0.05. Brand image had 85.3 % and statistically significant effect of r(245) = 0.853, p<0.05. Printed information had 73.8% and statistically significant effect of r(245) = 0.738, p<0.05. Packaging materials had 62.6% and statistically significant effect of r(245) = 0.626, p<0.05. Innovation had 92.3 % and statistically significant effect of r(245) = 0.923, p<0.05. Labelling quality had 76.5% and statistically significant effect of r(245) = 0.765, p<0.05. Design of wrapper had 44.2% and statistically significant effect of r(245) = 0.442, p<0.05. However, font style had only 1.2% and this effect is not statistically significant; r(245) = 0.012, p<0.05. This means that most consumers do not believe that font style influences consumers’ purchase decision. The study recommends that Institute of Packaging Ghana, Federation of Ghanaian Exporters, Ministry of Trade and Industry, Ghana Exports Promotions Authority and Association of Ghana Industries should collaborate to improve the packaging skills of the local African black soap producer. The essence is to enable them to package their products to meet the export market standards.

Pengaruh Desain Keamasan dan Kualitas Produk terhadap Kepuasan Pelanggan pada Home Industry Snack 324

The objectives of this research are to ascertain the following: the impact of product quality on customer satisfaction; the impact of packaging design on customer satisfaction; and the combined effect of packaging design and product quality on customer satisfaction. The study's sample consisted of 96 respondents in total, and it used a quantitative descriptive technique. The following conclusions were drawn from the study's findings: The significance level is 0.00 <0.05 (below the threshold of 0.05), and the alternative hypothesis (Ha) is accepted whereas the null hypothesis (H0) is rejected since 10.491> 1.661. The Packaging Design variable (X1) of 86.4% (0.864) in Home Industry Snack 324 demonstrates a positive and significant impact on consumer satisfaction. The same goes for Ha and H0; if the result is more than 1.661 and the significance level is 0.00 <0.05 (below the threshold of 0.05), then Ha is accepted. Product Quality (X2) has a positive and significant association with Customer Satisfaction in the Household Snack Industry 324, contributing 73.3% (0.733) to it. Furthermore, customer satisfaction (Y) is positively and significantly influenced by both packaging design (X1) and product quality (X2), with a determination coefficient of 0.875, or 87.5%. The estimated values concurrently exceed the ftable limit (333.246 > 3.09) at a significance level of less than 0.05 (0.000 < 0.05).

Optimal Conversion of Food Packaging Waste to Liquid Fuel via Nonthermal Plasma Treatment: A Model-Centric Approach

The efficiency of employing a multifactorial approach to enhance the nonthermal plasma (NTP) chemical conversion of solid waste food packaging materials into liquid petroleum hydrocarbons was assessed for the first time in this study. The researchers adopted a hybrid approach which integrated the zero-dimensional (0-D) and response surface model (RSM) techniques. After their application, the researchers noted that these strategies significantly enhanced the model prediction owing to their accurate electrochemical description. Here, the researchers solved a set of equations to identify the optimisation dynamics. They also established experimental circumstances to determine the quantitative correlation among all process variables contributing to food plastic packaging waste degradation and the production of liquid fuels. The findings of the study indicate a good agreement between the numerical and experimental values. It was also noted that the electrical variables of NTP significantly influenced the conversion yield (Yconv%) of solid plastic packaging waste to liquid hydrocarbons. Similarly, after analysing the data, it was seen that factors like the power discharge rate (x1 ), discharge interval (x2), power frequency (x3), and power intensity (x4) could significantly affect the product yield. After optimizing the variables, the researchers observed a maximal Yconv% of approximately 86%. The findings revealed that the proposed framework could effectively scale up the plasma synergistic pyrolysis technology for obtaining the highest Yconv% of solid packaging plastic wastes to produce an aromatics-enriched oil. The researchers subsequently employed the precision of the constructed framework to upgrade the laboratory-scale procedures to industrial-scale processes, which showed more than 95% efficiency. The extracted oil showed a calorific value of 43,570.5 J/g, indicating that the liquid hydrocarbons exhibited properties similar to commercial diesel.

Olive pomace upcycling: Eco-friendly production of cellulose nanofibers by enzymatic hydrolysis and application in starch films.

Olive pomace (OP) waste, produced in large quantities, contains significant amounts of cellulose and fibers, making it a valuable resource for developing reinforcing ingredients in biodegradable packaging materials. This study aimed to produce nanofibers from OP using enzymatic hydrolysis with hemicellulases and cellulases, and to incorporate these nanofibers into starch films as a reinforcing agent. Cellulose nanofibers (CNFs) were prepared by alkaline pretreatment followed by enzymatic hydrolysis (with hemicellulases and cellulases) from olive pomace and applied as reinforcement in starch films in concentrations of 0.5%-5% (w/v). The nanofibers were analyzed according to composition, structural, and thermal properties. The nanofibers' suspension presented a cloudy and white color in aqueous suspension, the X-ray diffraction (XRD) analysis showed the increase of crystallinity, and the fibers' range was no wider than 100nm (according to Scherer equation). The composition analysis showed the decrease of carbonyl groups of hemicellulose and lignin. The starch films presented a homogenous surface. The solubility from these biodegradable films significantly reduced after the incorporation of CNF, and the nanomaterial's presence improved the degradation temperature (from 310°C to 322°C) and the mechanical resistance because the tension of rupture increased from 3.79 to 6.21MPa. PRACTICAL APPLICATION: The utilization of waste from the olive pomace for cellulose nanofiber production holds promise, given the nanofibers' ability to readily integrate into various materials, including starches used in biodegradable film production. Within these matrices, nanofibers act as structure reinforcers and significantly reduce the solubility of films. Although biodegradable films ensure the shelf life, safety, and quality of food, their properties currently do not match those of traditional petroleum-based materials at an industrial scale, indicating a need for further enhancement.

Pengembangan Makanan Tradisional Apem Kesesi Menggunakan Metode Quality Function Deployment (QFD) dan Konsep Green Product Sebagai Upaya Meningkatkan Kualitas Produk

Apem kesesi is a traditional wet cake food in Pekalongan district. Apem kesesi cake has the problem of not being long-lasting, the packaging and appearance of the product is less attractive, less hygienic, impractical and the taste is not suitable for the younger generation. Therefore, it is necessary to develop apem kesesi products according to needs to improve product quality. Apem kesesi product development uses the quality faction deployment (QFD) method and the green product concept. Based on survey results, consumers want apem kesesi products that are hygienic, practical, unique, have attractive packaging and are durable. The main ingredient for making apem cake is rice flour. Add tapioca flour to give the apem cake a chewy texture, palm sugar to produce a distinctive taste and aroma, then vanilla to strengthen the taste, and sodium benzoate as a preservative. The product packaging design consists of primary packaging and secondary packaging. Based on validation tests and different tests, the results showed that the product design developed met consumer needs and was better than existing products.

The influence of storage conditions on the dynamics of physicochemical markers of champignon (Agaricus bisporus) quality

Agaricus bisporus are the most common cultivated mushrooms. Champignons are a source of chitin, glycogen and minerals, and also have attractive organoleptic properties. Physicochemical and organoleptic characteristics of fresh Agaricus bisporus undergo significant changes during storage due to moisture transpiration, respiration and oxidative processes. The purpose of this work was to study the influence of storage conditions of cultivated champignons with unstained cap epithelium on the dynamics of their physicochemical parameters, as well as its relationship with changes in organoleptic parameters. The mushrooms were stored in refrigerated chambers at a constant temperature of +2 °C and +6 °C in polypropylene trays placed in bags made of biaxially oriented polypropylene (BOPP) perforated film and polyethylene (PE) film without perforation. Under all storage conditions studied, the nature of the dynamics of physicochemical parameters was close to linear (with the exception of the humidity of fruiting bodies when stored in PE film) — the calculated values of the Pearson correlation coefficient ranged from 0.67 to 0.97. Using two-factor analysis of variance, the influence of both packaging material and storage temperature on the dynamics of soluble solids content and mushroom tissue density was confirmed. When stored in PE film without perforation, a more intense negative dynamics of these criteria was observed compared to storage in perforated BOPP film. The identified difference is explained by the fact that in packaging made of PE film without perforation, conditions for anaerobic respiration were formed by the end of storage — the oxygen content decreased from 20.5% to 1.5–2.5%, which also contributed to the activation of decay processes. With increasing storage temperature, a more intense change in physicochemical parameters was observed, which was associated with an increase in metabolic rate. The relationship between the dynamics of all studied physicochemical quality markers and the dynamics of sensory assessments (with the exception of the marker "content of soluble solids" when stored in a perforated BOPP film at a temperature of 2 °C) has been statistically confirmed. Based on the results of the studies, the applicability of the criteria “humidity of fruiting bodies”, “content of soluble dry substances” and “density of fungal tissue” as markers for assessing the quality of cultivated Agaricus bisporus was confirmed.

Ag-Pd nanoalloy film with ultra-high thermal and electrochemical stability for power electronic packaging

Nano-Ag paste is a popular material in power electronic packaging, while its microstructure is unstable at high temperatures and suffers from electrochemical migration. In this work, Ag-Pd nanoalloy film has been prepared by the pulsed laser deposition, and been sintered at low temperature for packaging. The thermal stability is significantly improved at 300 ℃ when Ag is alloyed with Pd. The Pd addition significantly increased the diffusion activation energy of Ag atoms and reduced the diffusion coefficient. The Ag-Pd sintered layer exhibited a stable microstructure at 300 °C or even 500 °C, which indicated that Ag-Pd nanoalloy had the potential to serve at high temperatures. Ag-Pd nanoalloy will preferentially generate a PdO passivation film and cover the anode surface, thereby slowing down the dissolution of the Ag and improving its resistance to electrochemical migration. This work provides theoretical studies and insights into the applications of Ag-Pd nanoalloys in high-reliability power electronics.

Core-Shell Engineered Fillers Overcome the Electrical-Thermal Conductance Trade-Off.

The rapid development of modern electronic devices increasingly requires thermal management materials with controllable electrical properties, ranging from conductive and dielectric to insulating, to meet the needs of diverse applications. However, highly thermally conductive materials usually have a high electrical conductivity. Intrinsically highly thermally conductive, but electrically insulating materials are still limited to a few kinds of materials. To overcome the electrical-thermal conductance trade-off, here, we report a facile Pechini-based method to prepare multiple core (metal)/shell (metal oxide) engineered fillers, such as aluminum-oxide-coated and beryllium-oxide-coated Ag microspheres. In contrast to the previous in situ growth method which mainly focused on small-sized spheres with specific coating materials, our method combined with ultrafast joule heating treatment is more versatile and robust for varied-sized, especially large-sized core-shell fillers. Through size compounding, the as-synthesized core-shell-filled epoxy composites exhibit high isotropic thermal conductivity (∼3.8 W m-1 K-1) while maintaining high electrical resistivity (∼1012 Ω cm) and good flowability, showing better heat dissipation properties than commercial thermally conductive packaging materials. The successful preparation of these core-shell fillers endows thermally conductive composites with controlled electrical properties for emerging electronic package applications, as demonstrated in circuit board and battery thermal management.

Visible light-activated dye-sensitized TiO2 antibacterial film: A novel strategy for enhancing food safety and quality

Antibacterial packaging holds promise in addressing food spoilage by inactivating bacteria, but current antimicrobial packaging solutions face challenges like depletion of antibacterials and concerns of antibiotic abuse. In response to these limitations of existing packaging materials, we developed a novel antibacterial packaging film by incorporating titanium dioxide (TiO2)- tetra(4-carboxyphenyl) porphyrin (TcPP) conjugates into cellulose nanofibrils (CNF) films. Unlike conventional antimicrobial packaging, this film harnesses visible light energy to excite electrons from TcPP to TiO2, generating reactive oxygen species (ROS) that inactivate bacteria without relying on antibiotics. Results demonstrated that the film reduced 4.5, 4.6, 4.1, and 4.7-log Escherichia coli, Pseudomonas fluorescens, Leuconostoc lactis, and Listeria innocua, respectively, in phosphate-buffered saline within 72h under 6000 lux light (3.13mW/cm2). The antimicrobial efficacy decreased as the light intensity decreased. Notably, it retains significant antimicrobial properties even under an extremely low light intensity of 600 lux (0.60mW/cm2). The analysis also revealed that singlet oxygen and hydrogen peroxide are the major generated ROS from the film under light exposure. When applied to cucumbers, the film reduced E. coli by 3.5 logs after 48-hour light exposure. The designed photocatalytic antibacterial film represents a major advancement in sustainable food preservation, reducing food waste by extending the shelf life of fresh produce.

Development of Technologies for Processing Polypropylene Foil Waste and Their Use in the Production of Finished Products

This work aims to assess the possibility of using packaging industry waste to modify polypropylene products (PPs). The products were made in the form of extruded foil and injected samples. The products were produced using regranulate made of polypropylene cast foil. Maleic anhydride-modified polypropylene (MAPP) and polyolefin elastomer (POE) with a glycidyl ester functional group were used to modify the polypropylene. The samples were produced based on 50% foil waste reground and 50% pure PP. The rheological properties of the blends were assessed using the melt mass flow rate (MFR) technique; thermal properties using the differential scanning calorimetry method (DSC). The products manufactured using the injection molding method were subjected to an analysis of mechanical properties, such as tensile strength and impact strength. Also, in the case of film samples, tensile strength was assessed. Color-change assessments with CIE L*a*b* were carried out for all materials. Injection-molded products based on recycled metallized cast foil showed favorable mechanical properties such as tensile strength (1 MAPP = 26.7 MPa; 2 MAPP = 27.1 MPa), which was higher than the original material (cPP = 20.7 MPa). Also, for the films produced from regrind, the tensile strength was at a level similar (1 MAPP = 24.6 MPa; 2 MAPP/POE = 25.1 MPa) to the films extruded from virgin materials (cPP = 24.9 MPa). The introduction of a POE additive to the blends resulted in increased impact strength (1 MAPP/POE = 31 kJ/mol; 2MAPP/POE = 18 kJ/mol; 3 MAPP/POE = 11 kJ/mol) in relation to unmodified samples (cPP = 7 kJ/mol). The introduction of a POE additive to the tested mixtures improved the impact strength of the injected products by almost 4 times for sample 1 MAPP/POE and 2.5 times for sample 2 MAPP/POE in comparison to virgin cPP. These studies confirmed that foil waste can be successfully used to modify polypropylene products shaped both in the injection and extrusion processes.