Production of heat shrinkable components
The radiation-chemical process based on cross-linking of polymers realised in industry is the production of hardened and heat-shrinkable products. Among them are heat shrinkable films, tapes, bags, tubes, pipes, hoses and products of more complex configuration used in oil and gas, electrical, automotive and food industries, electronics, shipbuilding, construction.
The manufacturing of heat shrinkable products is based on the ‘memory’ (or ‘shape memory’) effect. Its essence consists in the fact that polymer material, irradiated to a dose, the value of which is less than the dose of gel formation, deformed at a temperature above the melting point of crystallites (structures in polymers with three-dimensional long-range order formed by links of macromolecules; the size of these structures does not exceed several microns) and then quickly cooled, after reheating to the same temperature tends (due to the formation of a spatial grid) to restore the original shape. If this material is used to cover an object, it forms a dense shell on it after heating.
Polymers used: polyethylene; polyvinyl chloride; polyvinylene fluoride; some rubbers; copolymers of ethylene with ethyl acrylate; copolymers of ethylene with vinyl acetate; etc.
Electron accelerators are used in the production of heat shrinkable products. Electron beams with energy of 1 - 3 MeV are used for irradiation of tubes, and in case of films and tapes - beams with energy of 0.5 - 1.0 MeV. The doses required for the production of heat-shrinkable tubes and tapes are 50 - 150 kGy.
The manufacturing of heat shrinkable products is based on the ‘memory’ (or ‘shape memory’) effect. Its essence consists in the fact that polymer material, irradiated to a dose, the value of which is less than the dose of gel formation, deformed at a temperature above the melting point of crystallites (structures in polymers with three-dimensional long-range order formed by links of macromolecules; the size of these structures does not exceed several microns) and then quickly cooled, after reheating to the same temperature tends (due to the formation of a spatial grid) to restore the original shape. If this material is used to cover an object, it forms a dense shell on it after heating.
Polymers used: polyethylene; polyvinyl chloride; polyvinylene fluoride; some rubbers; copolymers of ethylene with ethyl acrylate; copolymers of ethylene with vinyl acetate; etc.
Electron accelerators are used in the production of heat shrinkable products. Electron beams with energy of 1 - 3 MeV are used for irradiation of tubes, and in case of films and tapes - beams with energy of 0.5 - 1.0 MeV. The doses required for the production of heat-shrinkable tubes and tapes are 50 - 150 kGy.
The radiation-chemical process based on cross-linking of polymers realised in industry is the production of hardened and heat-shrinkable products. Among them are heat shrinkable films, tapes, bags, tubes, pipes, hoses and products of more complex configuration used in oil and gas, electrical, automotive and food industries, electronics, shipbuilding, construction.
The manufacturing of heat shrinkable products is based on the ‘memory’ (or ‘shape memory’) effect. Its essence consists in the fact that polymer material, irradiated to a dose, the value of which is less than the dose of gel formation, deformed at a temperature above the melting point of crystallites (structures in polymers with three-dimensional long-range order formed by links of macromolecules; the size of these structures does not exceed several microns) and then quickly cooled, after reheating to the same temperature tends (due to the formation of a spatial grid) to restore the original shape. If this material is used to cover an object, it forms a dense shell on it after heating.
Polymers used: polyethylene; polyvinyl chloride; polyvinylene fluoride; some rubbers; copolymers of ethylene with ethyl acrylate; copolymers of ethylene with vinyl acetate; etc.
Electron accelerators are used in the production of heat shrinkable products. Electron beams with energy of 1 - 3 MeV are used for irradiation of tubes, and in case of films and tapes - beams with energy of 0.5 - 1.0 MeV. The doses required for the production of heat-shrinkable tubes and tapes are 50 - 150 kGy.
The manufacturing of heat shrinkable products is based on the ‘memory’ (or ‘shape memory’) effect. Its essence consists in the fact that polymer material, irradiated to a dose, the value of which is less than the dose of gel formation, deformed at a temperature above the melting point of crystallites (structures in polymers with three-dimensional long-range order formed by links of macromolecules; the size of these structures does not exceed several microns) and then quickly cooled, after reheating to the same temperature tends (due to the formation of a spatial grid) to restore the original shape. If this material is used to cover an object, it forms a dense shell on it after heating.
Polymers used: polyethylene; polyvinyl chloride; polyvinylene fluoride; some rubbers; copolymers of ethylene with ethyl acrylate; copolymers of ethylene with vinyl acetate; etc.
Electron accelerators are used in the production of heat shrinkable products. Electron beams with energy of 1 - 3 MeV are used for irradiation of tubes, and in case of films and tapes - beams with energy of 0.5 - 1.0 MeV. The doses required for the production of heat-shrinkable tubes and tapes are 50 - 150 kGy.
The radiation-chemical process based on cross-linking of polymers realised in industry is the production of hardened and heat-shrinkable products. Among them are heat shrinkable films, tapes, bags, tubes, pipes, hoses and products of more complex configuration used in oil and gas, electrical, automotive and food industries, electronics, shipbuilding, construction.
The manufacturing of heat shrinkable products is based on the ‘memory’ (or ‘shape memory’) effect. Its essence consists in the fact that polymer material, irradiated to a dose, the value of which is less than the dose of gel formation, deformed at a temperature above the melting point of crystallites (structures in polymers with three-dimensional long-range order formed by links of macromolecules; the size of these structures does not exceed several microns) and then quickly cooled, after reheating to the same temperature tends (due to the formation of a spatial grid) to restore the original shape. If this material is used to cover an object, it forms a dense shell on it after heating.
Polymers used: polyethylene; polyvinyl chloride; polyvinylene fluoride; some rubbers; copolymers of ethylene with ethyl acrylate; copolymers of ethylene with vinyl acetate; etc.
Electron accelerators are used in the production of heat shrinkable products. Electron beams with energy of 1 - 3 MeV are used for irradiation of tubes, and in case of films and tapes - beams with energy of 0.5 - 1.0 MeV. The doses required for the production of heat-shrinkable tubes and tapes are 50 - 150 kGy.
The manufacturing of heat shrinkable products is based on the ‘memory’ (or ‘shape memory’) effect. Its essence consists in the fact that polymer material, irradiated to a dose, the value of which is less than the dose of gel formation, deformed at a temperature above the melting point of crystallites (structures in polymers with three-dimensional long-range order formed by links of macromolecules; the size of these structures does not exceed several microns) and then quickly cooled, after reheating to the same temperature tends (due to the formation of a spatial grid) to restore the original shape. If this material is used to cover an object, it forms a dense shell on it after heating.
Polymers used: polyethylene; polyvinyl chloride; polyvinylene fluoride; some rubbers; copolymers of ethylene with ethyl acrylate; copolymers of ethylene with vinyl acetate; etc.
Electron accelerators are used in the production of heat shrinkable products. Electron beams with energy of 1 - 3 MeV are used for irradiation of tubes, and in case of films and tapes - beams with energy of 0.5 - 1.0 MeV. The doses required for the production of heat-shrinkable tubes and tapes are 50 - 150 kGy.
The radiation-chemical process based on cross-linking of polymers realised in industry is the production of hardened and heat-shrinkable products. Among them are heat shrinkable films, tapes, bags, tubes, pipes, hoses and products of more complex configuration used in oil and gas, electrical, automotive and food industries, electronics, shipbuilding, construction.
The manufacturing of heat shrinkable products is based on the ‘memory’ (or ‘shape memory’) effect. Its essence consists in the fact that polymer material, irradiated to a dose, the value of which is less than the dose of gel formation, deformed at a temperature above the melting point of crystallites (structures in polymers with three-dimensional long-range order formed by links of macromolecules; the size of these structures does not exceed several microns) and then quickly cooled, after reheating to the same temperature tends (due to the formation of a spatial grid) to restore the original shape. If this material is used to cover an object, it forms a dense shell on it after heating.
Polymers used: polyethylene; polyvinyl chloride; polyvinylene fluoride; some rubbers; copolymers of ethylene with ethyl acrylate; copolymers of ethylene with vinyl acetate; etc.
Electron accelerators are used in the production of heat shrinkable products. Electron beams with energy of 1 - 3 MeV are used for irradiation of tubes, and in case of films and tapes - beams with energy of 0.5 - 1.0 MeV. The doses required for the production of heat-shrinkable tubes and tapes are 50 - 150 kGy.
The manufacturing of heat shrinkable products is based on the ‘memory’ (or ‘shape memory’) effect. Its essence consists in the fact that polymer material, irradiated to a dose, the value of which is less than the dose of gel formation, deformed at a temperature above the melting point of crystallites (structures in polymers with three-dimensional long-range order formed by links of macromolecules; the size of these structures does not exceed several microns) and then quickly cooled, after reheating to the same temperature tends (due to the formation of a spatial grid) to restore the original shape. If this material is used to cover an object, it forms a dense shell on it after heating.
Polymers used: polyethylene; polyvinyl chloride; polyvinylene fluoride; some rubbers; copolymers of ethylene with ethyl acrylate; copolymers of ethylene with vinyl acetate; etc.
Electron accelerators are used in the production of heat shrinkable products. Electron beams with energy of 1 - 3 MeV are used for irradiation of tubes, and in case of films and tapes - beams with energy of 0.5 - 1.0 MeV. The doses required for the production of heat-shrinkable tubes and tapes are 50 - 150 kGy.