Abstract:
The foam sheet of the present invention is biodegradable, can be recycled, has good processability, is lightweight, exhibits excellent appearance, has practically satisfactory heat resistance and is more acceptable to the environment. There is provided a crosslinked biodegradable resin continuous foam sheet comprising biodegradable resin, and has an expansion rate of about 1.5 to about 50 and a gel fraction of about 3% or more. There is further provided a method for producing the foam sheet comprising the steps of: (1) preparing a sheet from a resin composition comprising a biodegradable resin, a thermal decomposable blowing agent and a crosslinking promoter; (2) irradiating the resulting sheet with an ionizing radiation to crosslink the resin composition; and (3) subjecting the crosslinked sheet to heat treatment to continuously prepare a crosslinked foam sheet. Thus, the foam sheet of the present invention can be used in a wide range of practical applications such as, for example, interior materials for an automobile, thermal insulators such as a pipe covering, cushioning materials such as a tape core and the like.
Abstract:
A polylactic acid foam of beautiful appearance excelling in heat resistance and having satisfactory mechanical properties is provided from polylactic acid and a polyolefin resin and further a vinyl-carboxylate-modified polyolefin resin. The polylactic acid foam is characterized in that not only 1 to 80 parts by weight of polylactic acid but also vinyl-carboxylate-modified polyolefin is contained in 100 parts by weight of polyolefin resin containing 50 wt.% or more of polypropylene resin.
Abstract:
The present invention provides a crosslinked polyolefin resin foam which is excellent in heat resistance, and also can be secondarily processed into a complicated shape. The crosslinked polyolefin resin foam includes a polyolefin resin composition containing 20 to 50% by weight of a polypropylene-based resin (A) which shows at least one endothermic peak measured by differential scanning calorimeter at a temperature of 160°C or higher, 20 to 50% by weight of a polypropylene-based resin (B) which shows an endothermic peak measured by differential scanning calorimeter at a temperature of lower than 160°C, and 20 to 40% by weight of a polyethylene-based resin (c), and can be obtained by forming the polyolefin resin composition into an optional form and foaming and crosslinking the resin.
Abstract:
The foam sheet of the present invention is biodegradable, can be recycled, has good processability, is lightweight, exhibits excellent appearance, has practically satisfactory heat resistance and is more acceptable to the environment. There is provided a crosslinked biodegradable resin continuous foam sheet comprising biodegradable resin, and has an expansion rate of about 1.5 to about 50 and a gel fraction of about 3% or more. There is further provided a method for producing the foam sheet comprising the steps of: (1) preparing a sheet from a resin composition comprising a biodegradable resin, a thermal decomposable blowing agent and a crosslinking promoter; (2) irradiating the resulting sheet with an ionizing radiation to crosslink the resin composition; and (3) subjecting the crosslinked sheet to heat treatment to continuously prepare a crosslinked foam sheet. Thus, the foam sheet of the present invention can be used in a wide range of practical applications such as, for example, interior materials for an automobile, thermal insulators such as a pipe covering, cushioning materials such as a tape core and the like.
Abstract:
The present invention provides a crosslinked polyolefin resin foam which is excellent in heat resistance, and also can be secondarily processed into a complicated shape. The crosslinked polyolefin resin foam includes a polyolefin resin composition containing 20 to 50% by weight of a polypropylene-based resin (A) which shows at least one endothermic peak measured by differential scanning calorimeter at a temperature of 160°C or higher, 20 to 50% by weight of a polypropylene-based resin (B) which shows an endothermic peak measured by differential scanning calorimeter at a temperature of lower than 160°C, and 20 to 40% by weight of a polyethylene-based resin (c), and can be obtained by forming the polyolefin resin composition into an optional form and foaming and crosslinking the resin.
Abstract:
The invention relates to polylactic acid foam comprising a resin composition that comprises polylactic acid (A), polyolefin resin (B) and a polyolefin resin copolymer (C) wherein the weight ratio of the polylactic acid to the sum of the polyolefin resin and polyolefin resin copolymer in the resin composition, (A)/{(B)+(C)}, is in the range of 0.2 - 6. The polylactic acid foam used is low in the load in global environment and high in heat resistance, moldability and compression strain recovery, and this polylactic acid foam can be applied to a wide variety of uses where polyolefin resin foam has been used conventionally, including interior members of vehicles, heat insulator, cushioning medium, packing material, base of pressure sensitive adhesive tapes, and joint filler for tiles.
Abstract:
The invention relates to polylactic acid foam comprising a resin composition that comprises polylactic acid (A), polyolefin resin (B) and a polyolefin resin copolymer (C) wherein the weight ratio of the polylactic acid to the sum of the polyolefin resin and polyolefin resin copolymer in the resin composition, (A)/{(B)+(C)}, is in the range of 0.2 - 6. The polylactic acid foam used is low in the load in global environment and high in heat resistance, moldability and compression strain recovery, and this polylactic acid foam can be applied to a wide variety of uses where polyolefin resin foam has been used conventionally, including interior members of vehicles, heat insulator, cushioning medium, packing material, base of pressure sensitive adhesive tapes, and joint filler for tiles.
Abstract:
The foam sheet of the present invention is biodegradable, can be recycled, has good processability, is lightweight, exhibits excellent appearance, has practically satisfactory heat resistance and is more acceptable to the environment. There is provided a crosslinked biodegradable resin continuous foam sheet comprising biodegradable resin, and has an expansion rate of about 1.5 to about 50 and a gel fraction of about 3% or more. There is further provided a method for producing the foam sheet comprising the steps of: (1) preparing a sheet from a resin composition comprising a biodegradable resin, a thermal decomposable blowing agent and a crosslinking promoter; (2) irradiating the resulting sheet with an ionizing radiation to crosslink the resin composition; and (3) subjecting the crosslinked sheet to heat treatment to continuously prepare a crosslinked foam sheet. Thus, the foam sheet of the present invention can be used in a wide range of practical applications such as, for example, interior materials for an automobile, thermal insulators such as a pipe covering, cushioning materials such as a tape core and the like.