The changes of LD-PE films after exposure in different media

AbstractThis work deals with the study of polymers, and, in particular, polyethylene; its production, types, properties, and usage. The experimental part evaluates the changes of properties of the polyethylene film to be reused under various exposure conditions and selection of the most suitable medium for its application. The film made of low-density polyethylene (LD-PE) was influenced by aggressive media with different pH, specifically Savo for the disinfection, Savo as a Saponate for dish washing and Coca-Cola. On LD-PE films the water absorption and melting temperature evaluation tests were performed. Carried out tests show that the most aggressive medium for LD-PE film from used media is Coca-Cola. The most effective application of LD-PE film like wrapping on container transported is the Savo used as a Saponate for dish washing.

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Efficacy of Two Acidic Sanitizers for Microbial Reduction on Metal Cans and Low-Density Polyethylene Film Surfaces

Journal of Food Science ◽

10.1111/j.1750-3841.2007.00496.x ◽

2007 ◽

Vol 72 (8) ◽

pp. M335-M339 ◽

Cited By ~ 9

Author(s):

J. Lee ◽

M.J. Gupta ◽

J. Lopes ◽

M.A. Pascall

Keyword(s):

Microbial Reduction ◽

Polyethylene Film ◽

Low Density Polyethylene ◽

Low Density

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The Effect of Polymer Waste Addition on the Compressive Strength and Water Absorption of Geopolymer Ceramics

Applied Sciences ◽

10.3390/app11083540 ◽

2021 ◽

Vol 11 (8) ◽

pp. 3540

Author(s):

Numfor Linda Bih ◽

Assia Aboubakar Mahamat ◽

Jechonias Bidossèssi Hounkpè ◽

Peter Azikiwe Onwualu ◽

Emmanuel E. Boakye

Keyword(s):

Public Health ◽

Compressive Strength ◽

Fracture Surface ◽

Water Absorption ◽

Chemical Bonding ◽

Low Density Polyethylene ◽

Low Density ◽

Polymer Waste ◽

Pull Out

The quantity of polymer waste in our communities is increasing significantly. It is therefore necessary to consider reuse or recycling waste to avoid an increase in the risk to public health. This project is aimed at using pulverized low-density polyethylene (LDPE) waste as a source to reinforce and improve compressive strength, and to reduce the water absorption of geopolymer ceramics (GC). Clay:LDPE composition consisting of 5%, 10%, and 15% LDPE was geopolymerized with an NaOH/Na2SiO3 solution and cured at 30 °C and 50 °C. Characterization of the geopolymer samples was carried out using XRF and XRD. The microstructure was analyzed by SEM and chemical bonding by FTIR. The SEM micrographs showed LDPE particle pull-out on the geopolymer ceramics’ fracture surface. The result showed that the compressive strength increases with the addition of pulverized polymer waste compared to the controlled without LDPE addition. Water absorption decreased with an increase in LDPE addition in the geopolymer ceramics composite.

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Properties of Low-Cost WPCs Made from Alien Invasive Trees and rLDPE for Interior Use in Social Housing

Polymers ◽

10.3390/polym13152436 ◽

2021 ◽

Vol 13 (15) ◽

pp. 2436

Author(s):

Abubakar Sadiq Mohammed ◽

Martina Meincken

Keyword(s):

Tensile Strength ◽

Water Absorption ◽

Social Housing ◽

Low Cost ◽

Production Costs ◽

Low Density Polyethylene ◽

Low Grade ◽

Low Density ◽

Invasive Trees ◽

Recycled Low Density Polyethylene

Low-cost wood–plastic composites (WPCs) were developed from invasive trees and recycled low-density polyethylene. The aim was to produce affordable building materials for low-cost social housing in South Africa. Both raw materials are regarded as waste materials, and the subsequent product development adds value to the resources, while simultaneously reducing the waste stream. The production costs were minimised by utilising the entire biomass of Acacia saligna salvaged from clearing operations without any prior processing, and low-grade recycled low-density polyethylene to make WPCs without any additives. Different biomass/plastic ratios, particle sizes, and press settings were evaluated to determine the optimum processing parameters to obtain WPCs with adequate properties. The water absorption, dimensional stability, modulus of rupture, modulus of elasticity, tensile strength, and tensile moduli were improved at longer press times and higher temperatures for all blending ratios. This has been attributed to the crystallisation of the lignocellulose and thermally induced cross-linking in the polyethylene. An increased biomass ratio and particle size were positively correlated with water absorption and thickness swelling and inversely related with MOR, tensile strength, and density due to an incomplete encapsulation of the biomass by the plastic matrix. This study demonstrates the feasibility of utilising low-grade recycled polyethylene and the whole-tree biomass of A. saligna, without the need for pre-processing and the addition of expensive modifiers, to produce WPCs with properties that satisfy the minimum requirements for interior cladding or ceiling material.

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