(EP992518-A1)      A tetrafluoroethylene copolymer comprises 30-81 mol.% tetrafluoroethylene and 70-19 mol.% 1 or more other monomers, the polymer chain of which is terminated with a carbonate group and has a melt flow rate (MFR) of 0.1-100 g/10 mins. (at 200C, 5 kg load) and melting point of 90-200C.    DETAILED DESCRIPTION - A tetrafluoroethylene copolymer comprises 30-81 mol.% tetrafluoroethylene and 70-19 mol.% 1 or more other monomers, the polymer chain of which is terminated with a carbonate group and has a melt flow rate (MFR) of 0.1-100 g/10 mins. (at 200C, 5 kg load) and melting point of 90-200C.    POLYMERS - Preferred Copolymer: The polymer is preferably produced form 40-81 mol.% tetrafluoroethylene and 60-19 mol.% other monomers, with MFR of 1-100, particularly 1-50, /10 mins. and critical shearing rate of 10-103/sec at 230C. Such copolymer is particularly made with tetrafluoroethylene, ethylene, a fluorovinyl compound of formula: CH2_=CFRf (where Rf = 2-10C fluoroalkyl), and hexafluoropropylene, with tetrafluoroethylene to ethylene molar ratio being 40:60-90:10, fluorovinyl compound content of 0-10 mol.%, with respect to total copolymer, and hexafluoropropylene content of 10-30 mol.%. The fluorovinyl compound is especially of formula: CH2=CF(CF2)nH (where n = 3-5). In the infra-red absorption spectrum of the copolymer, ratio of height of absorption peak due to the CH2 group of the main chain observed at 2881/cm to that due to the terminal carbonate is &nlt; 0.7.Preferred Laminates: A layer of the copolymer is laminated with a layer of other material including other fluororesins, thermoplastic resins, thermosetting resins, siliceous materials and metals. The tetrafluoroethylene copolymer layer can be the outer or middle layer. More specifically, the other layer can be 1 or more of resin layers, silicone layers, rubber layers, thermoplastic elastomer layers, metal layers, glass layers, wood layers, ceramic layers, natural rock layers, concrete layers, cement layers, asbestos slate layers, paper layers, leather layers and hollow steel layers. The middle layer can also be a polymer material with 1 or more of amide and epoxy groups in the molecular chain, such as polyamide resins, polyamide elastomers, polyamide resin alloys, epoxy-containing polyolefin resins and epoxy resins. On the other layer, printed layer is provided on at least 1 surface.Preferred Laminate Tubes: The copolymer layer can be the outer or middle layer. The tube can also be formed from an outer thermoplastic resin layer and tetrafluoroethylene copolymer inner layer. Such laminated tubes are particularly fuel pipes.    USE -   The copolymer can be used to produce films, laminates including laminated tubes, particularly fuel pipes, (claimed) and other objects like umbrellas, surface film and transparent filler for solar cells (claimed), and other applications.    ADVANTAGE -   The copolymer is bondable and co-extrudable with and heat-fusible to general-purpose resins but still retaining inherent properties of fluororesins such as chemical resistance, weatherability, transparency, non-tackiness, electrical insulation, anti-fouling characteristics and flame retardance.    The copolymer was prepared by the reaction of hexafluoropropylene (800 g) and CH2=CFC(CF2)3H (2 g) in perfluorocyclobutane (501.5 g) after introduction of tetrafluoroethylene/ethylene/perfluorocyclobutane (78.9:16.6:4.5 molar ratio) at 12 kgf/cm2, in the presence of di-n-propyl peroxydicarbonate (8 g) at 35C for 10 hrs., with more tetrafluoroethylene, ethylene, CH2=CFC(CF23H and polymerization initiator added in between. A product was obtained in 127 g yield. Properties of the copolymer: monomer composition, TFE/ET/HFP/H2P = 46.1/36.5/17/0.4; m.pt. = 1611C; MFR = 10.5 g/10 mins.; absorption peak ratio = 1.87; haze = 12.9%; critical shearing rate = 360 sec/1 at 230C; peeling strength = 5.2 kgf/cm2&lt;; bonding = 142 kgf/cm2 (with breakage of glass).    The drawing shows the structure of a solar cell module: 1 = insulation substrate; 2= light-induced power element; 3 = transparent filler layer; and 4 = surface film    (CN1261379-A)      A tetrafluoroethylene copolymer comprises 30-81 mol.% tetrafluoroethylene and 70-19 mol.% 1 or more other monomers, the polymer chain of which is terminated with a carbonate group and has a melt flow rate (MFR) of 0.1-100 g/10 mins. (at 200C, 5 kg load) and melting point of 90-200C.    DETAILED DESCRIPTION - A tetrafluoroethylene copolymer comprises 30-81 mol.% tetrafluoroethylene and 70-19 mol.% 1 or more other monomers, the polymer chain of which is terminated with a carbonate group and has a melt flow rate (MFR) of 0.1-100 g/10 mins. (at 200C, 5 kg load) and melting point of 90-200C.    POLYMERS - Preferred Copolymer: The polymer is preferably produced form 40-81 mol.% tetrafluoroethylene and 60-19 mol.% other monomers, with MFR of 1-100, particularly 1-50, /10 mins. and critical shearing rate of 10-103/sec at 230C. Such copolymer is particularly made with tetrafluoroethylene, ethylene, a fluorovinyl compound of formula: CH2_=CFRf (where Rf = 2-10C fluoroalkyl), and hexafluoropropylene, with tetrafluoroethylene to ethylene molar ratio being 40:60-90:10, fluorovinyl compound content of 0-10 mol.%, with respect to total copolymer, and hexafluoropropylene content of 10-30 mol.%. The fluorovinyl compound is especially of formula: CH2=CF(CF2)nH (where n = 3-5). In the infra-red absorption spectrum of the copolymer, ratio of height of absorption peak due to the CH2 group of the main chain observed at 2881/cm to that due to the terminal carbonate is &nlt; 0.7.Preferred Laminates: A layer of the copolymer is laminated with a layer of other material including other fluororesins, thermoplastic resins, thermosetting resins, siliceous materials and metals. The tetrafluoroethylene copolymer layer can be the outer or middle layer. More specifically, the other layer can be 1 or more of resin layers, silicone layers, rubber layers, thermoplastic elastomer layers, metal layers, glass layers, wood layers, ceramic layers, natural rock layers, concrete layers, cement layers, asbestos slate layers, paper layers, leather layers and hollow steel layers. The middle layer can also be a polymer material with 1 or more of amide and epoxy groups in the molecular chain, such as polyamide resins, polyamide elastomers, polyamide resin alloys, epoxy-containing polyolefin resins and epoxy resins. On the other layer, printed layer is provided on at least 1 surface.Preferred Laminate Tubes: The copolymer layer can be the outer or middle layer. The tube can also be formed from an outer thermoplastic resin layer and tetrafluoroethylene copolymer inner layer. Such laminated tubes are particularly fuel pipes.    USE -   The copolymer can be used to produce films, laminates including laminated tubes, particularly fuel pipes, (claimed) and other objects like umbrellas, surface film and transparent filler for solar cells (claimed), and other applications.    ADVANTAGE -   The copolymer is bondable and co-extrudable with and heat-fusible to general-purpose resins but still retaining inherent properties of fluororesins such as chemical resistance, weatherability, transparency, non-tackiness, electrical insulation, anti-fouling characteristics and flame retardance.    The copolymer was prepared by the reaction of hexafluoropropylene (800 g) and CH2=CFC(CF2)3H (2 g) in perfluorocyclobutane (501.5 g) after introduction of tetrafluoroethylene/ethylene/perfluorocyclobutane (78.9:16.6:4.5 molar ratio) at 12 kgf/cm2, in the presence of di-n-propyl peroxydicarbonate (8 g) at 35C for 10 hrs., with more tetrafluoroethylene, ethylene, CH2=CFC(CF23H and polymerization initiator added in between. A product was obtained in 127 g yield. Properties of the copolymer: monomer composition, TFE/ET/HFP/H2P = 46.1/36.5/17/0.4; m.pt. = 1611C; MFR = 10.5 g/10 mins.; absorption peak ratio = 1.87; haze = 12.9%; critical shearing rate = 360 sec/1 at 230C; peeling strength = 5.2 kgf/cm2&lt;; bonding = 142 kgf/cm2 (with breakage of glass).    The drawing shows the structure of a solar cell module: 1 = insulation substrate; 2= light-induced power element; 3 = transparent filler layer; and 4 = surface film    (JP11504114-X)      A tetrafluoroethylene copolymer comprises 30-81 mol.% tetrafluoroethylene and 70-19 mol.% 1 or more other monomers, the polymer chain of which is terminated with a carbonate group and has a melt flow rate (MFR) of 0.1-100 g/10 mins. (at 200C, 5 kg load) and melting point of 90-200C.    DETAILED DESCRIPTION - A tetrafluoroethylene copolymer comprises 30-81 mol.% tetrafluoroethylene and 70-19 mol.% 1 or more other monomers, the polymer chain of which is terminated with a carbonate group and has a melt flow rate (MFR) of 0.1-100 g/10 mins. (at 200C, 5 kg load) and melting point of 90-200C.    POLYMERS - Preferred Copolymer: The polymer is preferably produced form 40-81 mol.% tetrafluoroethylene and 60-19 mol.% other monomers, with MFR of 1-100, particularly 1-50, /10 mins. and critical shearing rate of 10-103/sec at 230C. Such copolymer is particularly made with tetrafluoroethylene, ethylene, a fluorovinyl compound of formula: CH2_=CFRf (where Rf = 2-10C fluoroalkyl), and hexafluoropropylene, with tetrafluoroethylene to ethylene molar ratio being 40:60-90:10, fluorovinyl compound content of 0-10 mol.%, with respect to total copolymer, and hexafluoropropylene content of 10-30 mol.%. The fluorovinyl compound is especially of formula: CH2=CF(CF2)nH (where n = 3-5). In the infra-red absorption spectrum of the copolymer, ratio of height of absorption peak due to the CH2 group of the main chain observed at 2881/cm to that due to the terminal carbonate is &nlt; 0.7.Preferred Laminates: A layer of the copolymer is laminated with a layer of other material including other fluororesins, thermoplastic resins, thermosetting resins, siliceous materials and metals. The tetrafluoroethylene copolymer layer can be the outer or middle layer. More specifically, the other layer can be 1 or more of resin layers, silicone layers, rubber layers, thermoplastic elastomer layers, metal layers, glass layers, wood layers, ceramic layers, natural rock layers, concrete layers, cement layers, asbestos slate layers, paper layers, leather layers and hollow steel layers. The middle layer can also be a polymer material with 1 or more of amide and epoxy groups in the molecular chain, such as polyamide resins, polyamide elastomers, polyamide resin alloys, epoxy-containing polyolefin resins and epoxy resins. On the other layer, printed layer is provided on at least 1 surface.Preferred Laminate Tubes: The copolymer layer can be the outer or middle layer. The tube can also be formed from an outer thermoplastic resin layer and tetrafluoroethylene copolymer inner layer. Such laminated tubes are particularly fuel pipes.    USE -   The copolymer can be used to produce films, laminates including laminated tubes, particularly fuel pipes, (claimed) and other objects like umbrellas, surface film and transparent filler for solar cells (claimed), and other applications.    ADVANTAGE -   The copolymer is bondable and co-extrudable with and heat-fusible to general-purpose resins but still retaining inherent properties of fluororesins such as chemical resistance, weatherability, transparency, non-tackiness, electrical insulation, anti-fouling characteristics and flame retardance.    The copolymer was prepared by the reaction of hexafluoropropylene (800 g) and CH2=CFC(CF2)3H (2 g) in perfluorocyclobutane (501.5 g) after introduction of tetrafluoroethylene/ethylene/perfluorocyclobutane (78.9:16.6:4.5 molar ratio) at 12 kgf/cm2, in the presence of di-n-propyl peroxydicarbonate (8 g) at 35C for 10 hrs., with more tetrafluoroethylene, ethylene, CH2=CFC(CF23H and polymerization initiator added in between. A product was obtained in 127 g yield. Properties of the copolymer: monomer composition, TFE/ET/HFP/H2P = 46.1/36.5/17/0.4; m.pt. = 1611C; MFR = 10.5 g/10 mins.; absorption peak ratio = 1.87; haze = 12.9%; critical shearing rate = 360 sec/1 at 230C; peeling strength = 5.2 kgf/cm2&lt;; bonding = 142 kgf/cm2 (with breakage of glass).    The drawing shows the structure of a solar cell module: 1 = insulation substrate; 2= light-induced power element; 3 = transparent filler layer; and 4 = surface film    (KR2001014114-A)      A tetrafluoroethylene copolymer comprises 30-81 mol.% tetrafluoroethylene and 70-19 mol.% 1 or more other monomers, the polymer chain of which is terminated with a carbonate group and has a melt flow rate (MFR) of 0.1-100 g/10 mins. (at 200C, 5 kg load) and melting point of 90-200C.    DETAILED DESCRIPTION - A tetrafluoroethylene copolymer comprises 30-81 mol.% tetrafluoroethylene and 70-19 mol.% 1 or more other monomers, the polymer chain of which is terminated with a carbonate group and has a melt flow rate (MFR) of 0.1-100 g/10 mins. (at 200C, 5 kg load) and melting point of 90-200C.    POLYMERS - Preferred Copolymer: The polymer is preferably produced form 40-81 mol.% tetrafluoroethylene and 60-19 mol.% other monomers, with MFR of 1-100, particularly 1-50, /10 mins. and critical shearing rate of 10-103/sec at 230C. Such copolymer is particularly made with tetrafluoroethylene, ethylene, a fluorovinyl compound of formula: CH2_=CFRf (where Rf = 2-10C fluoroalkyl), and hexafluoropropylene, with tetrafluoroethylene to ethylene molar ratio being 40:60-90:10, fluorovinyl compound content of 0-10 mol.%, with respect to total copolymer, and hexafluoropropylene content of 10-30 mol.%. The fluorovinyl compound is especially of formula: CH2=CF(CF2)nH (where n = 3-5). In the infra-red absorption spectrum of the copolymer, ratio of height of absorption peak due to the CH2 group of the main chain observed at 2881/cm to that due to the terminal carbonate is &nlt; 0.7.Preferred Laminates: A layer of the copolymer is laminated with a layer of other material including other fluororesins, thermoplastic resins, thermosetting resins, siliceous materials and metals. The tetrafluoroethylene copolymer layer can be the outer or middle layer. More specifically, the other layer can be 1 or more of resin layers, silicone layers, rubber layers, thermoplastic elastomer layers, metal layers, glass layers, wood layers, ceramic layers, natural rock layers, concrete layers, cement layers, asbestos slate layers, paper layers, leather layers and hollow steel layers. The middle layer can also be a polymer material with 1 or more of amide and epoxy groups in the molecular chain, such as polyamide resins, polyamide elastomers, polyamide resin alloys, epoxy-containing polyolefin resins and epoxy resins. On the other layer, printed layer is provided on at least 1 surface.Preferred Laminate Tubes: The copolymer layer can be the outer or middle layer. The tube can also be formed from an outer thermoplastic resin layer and tetrafluoroethylene copolymer inner layer. Such laminated tubes are particularly fuel pipes.    USE -   The copolymer can be used to produce films, laminates including laminated tubes, particularly fuel pipes, (claimed) and other objects like umbrellas, surface film and transparent filler for solar cells (claimed), and other applications.    ADVANTAGE -   The copolymer is bondable and co-extrudable with and heat-fusible to general-purpose resins but still retaining inherent properties of fluororesins such as chemical resistance, weatherability, transparency, non-tackiness, electrical insulation, anti-fouling characteristics and flame retardance.    The copolymer was prepared by the reaction of hexafluoropropylene (800 g) and CH2=CFC(CF2)3H (2 g) in perfluorocyclobutane (501.5 g) after introduction of tetrafluoroethylene/ethylene/perfluorocyclobutane (78.9:16.6:4.5 molar ratio) at 12 kgf/cm2, in the presence of di-n-propyl peroxydicarbonate (8 g) at 35C for 10 hrs., with more tetrafluoroethylene, ethylene, CH2=CFC(CF23H and polymerization initiator added in between. A product was obtained in 127 g yield. Properties of the copolymer: monomer composition, TFE/ET/HFP/H2P = 46.1/36.5/17/0.4; m.pt. = 1611C; MFR = 10.5 g/10 mins.; absorption peak ratio = 1.87; haze = 12.9%; critical shearing rate = 360 sec/1 at 230C; peeling strength = 5.2 kgf/cm2&lt;; bonding = 142 kgf/cm2 (with breakage of glass).    The drawing shows the structure of a solar cell module: 1 = insulation substrate; 2= light-induced power element; 3 = transparent filler layer; and 4 = surface film