Composites based on low-density polyethylene combined with PETcoated SBS paperboard shavings

Effects of short fibers and processing additives on HDPE composites properties reinforced with Pinus and Eucalyptus fibers

“…This suggests the presence of voids or pores due to air retention in composites during production 53,54 . Second Goll 55 this could be due to the formation of an interface between the composite phases, this fact was not observed in our study. However, despite not seeing statistical differences ( p > 0.05), there is a tendency to increase the density of composites as a function of the concentration of added fibers and with the incorporation of the processing aid.…”

Physical, mechanical and thermal properties of low-density polyethylene reinforced with PET-coated SBS paperboard shavings applying different processing conditions

“…An increase in the moisture content with an increase in the reinforcement content was observed for the composites reinforced with PETcoated SBS paperboard shavings. This finding is associated with the SBS paperboard composition, consisting of 85% cellulose pulp, which is composed of cellulose, hemicellulose and lignin, compounds that favor the absorption of moisture [22,33]. Lignocellulosic fibers have hygroscopic characteristics due to the presence of hydroxyl groups in their structure.…”

“…The compositions were: 80% LDPE and 20% PET-coated SBS paperboard; 90% LDPE and 10% PET-coated SBS paperboard; and 100% LDPE. The mass percentages for the composite materials were based on the research of GOLL et al [22]. The authors investigated the characteristics of composites whose compositions varied between 10 and 30% for PET-coated SBS paperboard shavings and 90 to 70% for the stretch film waste (LDPE) and concluded that reinforcement of PET-coated SBS paperboard above 20% hinder the extrusion process and composite homogeneity.…”

“…It could be due to a lack of homogeneity of mixture between reinforcement and matrix, generating differences between samples. The lack of homogeneity is one of the difficulties associated with preparing composites [22].…”

“…In addition, it is possible that fibers of larger diameter are not fully enveloped by the matrix. In this situation, the surface area of the large particles facilitates contact between the reinforcement and the environment, which can enhance the absorption of water and leads to a reduction in the mechanical properties of the materials [22,36].…”