Abstract: A combusible member includes a first material having a density less than one (1) and constituting a plastic material in cross-linked or linear form and having properties of being converted to a non-toxic gaseous form when subjected to heat. Preferably, the first material constitutes a polyethylene such as is obtained from discarded containers for consumible products. The polyethylene may have a percentage by weight in the range of approximately sixty percent (66%) to seventy six percent (76%) in the combustible member. The combustible material also includes a combustible member having properties of being oxidized when subjected to heat. Preferably the combustible material may constitute a wood product in particulate or pulp form. The combustible material may have a percentage by weight in the range of approximately twenty percent (20%) to thirty six percent (36%) in the combustible member. A binder having a melt index less than two thousand (2000) is also included in the combustible member.

Abstract: A rigid plastic article includes an outer skin surface of a polyolefin plastic material such as cross-linked high density polyethylene tightly secured to a foam core the latter preferably of a high density or medium density polyethylene. Such a laminated plastic article has substantial rigidity and strength, particularly flexural strength, the latter being greater for the laminate than the sum of the individual flexural strengths of the skin and foam separately. Due to the thermal and sound insulation, rigidity, flotation, impact resistance, relative lightweight and weatherability characteristics, the laminate offers particular advantages for use in complex shapes such as automotive doors and tops, camper tops, boats and recreational vehicles and containers such as water tanks, carboys and the like. Such products may be manufactured by a rotational molding procedure in which each of the plastic materials is sequentially introduced into a rotating heated mold.