摘要:
Heat-shrinkable polyester films having a heat shrinkability of 30% or more, preferably 40% or more, in the direction of major shrinkage after treatment in hot water at 80.degree. C. for 30 seconds, the ratio of heat shrinkability in the direction of major shrinkage after treatment in hot water at 80.degree. C. for 5 seconds to heat shrinkability in the direction of major shrinkage after treatment in hot water at 80.degree. C. for 30 seconds being 0.8 or less, preferably 0.7 or less. The heat-shrinkable polyester films are suitable for label applications because of their particular heat-shrinkable properties such that not only do they scarcely cause longitudinal sinking when shrunk but also they have very few wrinkles, shrinkage spots and strains remaining after shrinkage.
摘要:
In a thermo-shrinkable polyester film, the thermal shrinkage ratio in a main shrinking direction is about 20% or more after being treated in water of about 70.degree. C. for about seconds, about 35 to about 55% after treated in water of about 75.degree. C. for about 5 seconds, and about 50 to about 60% after being treated in water of about 80.degree. C. for about 5 seconds. After the film is shrunk by about 5% by treatment in water of about 75.degree. C. for about 10 seconds, the probability of the elongation at rupture of the film in the direction perpendicular to the main shrinking direction being about 20% or less, is about 10% or less. The ratio of .tau..sub.1 /.tau..sub.2 is about 0.05 to about 0.45, where .tau..sub.2 is the stress of shrinkage in a main shrinking direction of the film at about 90.degree. C., and .tau..sub.1 is the stress of shrinkage in a direction perpendicular to the main shrinking direction of the film at about 90.degree. C. The sealing strength of the film is about 1.2 kg/15 mm of width or more.
摘要翻译:在热收缩性聚酯膜中,在约70℃的水中处理约秒之后,主要收缩方向的热收缩率为约20%或更多,约35至约55%在约 在约80℃的水中处理约5秒钟,约75℃至约5秒,约50至约60%。 通过在约75℃的水中处理约5%的膜约10秒后,膜在垂直于主收缩方向的方向上的断裂伸长的概率为约20%以下, 约为10%以下。 tau 1 / tau 2的比例为约0.05至约0.45,其中τ2是在约90℃的膜的主收缩方向上的收缩应力,τ1是在垂直方向上的收缩应力 到约90℃的膜的主收缩方向。膜的密封强度为约1.2kg / 15mm的宽度或更大。
摘要:
A polyester film having a coefficient of dynamic friction between the film and a metal at 80.degree. C. of not more than 0.45, a polyester film composed of a polyester comprising an ethylene terephthalate unit in a proportion of 70% or more by mole, the polyester film comprising a cyclic ethylene terephthalate trimer in a proportion of 0.7% or less by weight, laminated metal sheets and metal containers manufactured from said laminated metal sheet. According to the present invention, the polyester film shows superior sliding property and superior scratch resistance during can production, as well as the elution of oligomer from the film can be suppressed, so that when the film is used for metal containers for food, the change in and smell of the food contained therein and degraded appearance of the surface of the film caused by the deposition of oligomer are avoided.
摘要:
A polyester film having a coefficient of dynamic friction between the film and a metal at 80.degree. C. of not more than 0.45, a polyester film composed of a polyester comprising an ethylene terephthalate unit in a proportion of 70% or more by mole, the polyester film comprising a cyclic ethylene terephthalate trimer in a proportion of 0.7% or less by weight, laminated metal sheets and metal containers manufactured from said laminated metal sheet. According to the present invention, the polyester film shows superior sliding property and superior scratch resistance during can production, as well as the elution of oligomer from the film can be suppressed, so that when the film is used for metal containers for food, the change in taste and smell of the food contained therein and degraded appearance of the surface of the film caused by the deposition of oligomer are avoided.
摘要:
A silane-crosslinkable copolymer composition comprising: (A) 100 parts by weight of a copolymer prepared by radically polymerizing a polymerizable monomeric mixture consisting essentially of ethylene and at least one ethylenically unsaturated silane compound selected from the group consisting of vinyltrimethoxysilane, vinyltriethoxysilane and .gamma.-methacryloxypropyltrimethoxysilane under a pressure ranging from 1,000 to 4,000 kg/cm.sup.2, and containing said silane compound in an amount of from 0.5 to 2 wt %; (B) from 0.001 to 10 parts by weight of a silanol condensation catalyst; and (C) from 0.01 to 5 parts by weight of a silane compound having a hydrolyzable organic group.
摘要:
A silane-crosslinkable copolymer composition comprising:(A) 100 parts by weight of a copolymer prepared by radically polymerizing a polymerizable monomeric mixture consisting essentially of ethylene and an ethylenically unsaturated silane compound having a hydrolyzable organic group under a high pressure, and containing said silane compound in an amount of from 0.1 to 5 wt %;(B) from 0.001 to 10 parts by weight of a silanol condensation catalyst; and(C) from 0.01 to 5 parts by weight of a silane compound having a hydrolyzable organic group.
摘要:
A novel flame-retardant ethylene polymer composition comprising a copolymer consisting essentially of ethylene and an olefinically unsaturated silane compound such as vinyltriethoxysilane, a silanol condensation catalyst such as dibutyltin dilaurate, and a flame retardant such as a chlorinated polyethylene.
摘要:
A heat sealable packaging material comprising (A) a stretched base layer formed of a propylene polymer and (B) a stretched surface layer formed of a blend of a propylene-ethylene copolymer and a C.sub.4 -C.sub.10 .alpha.-olefin-propylene copolymer in a weight proportion of 20:80 to 94:6 by weight on at least one surface of said base layer.
摘要:
In an electric power generating apparatus for dispersed power supply using a permanent magnet type electric power generator having many kinds of windings in order to obtain the maximum output by force of wind without using PWM converter, there is a problem that gap magnetic flux of the permanent magnet type electric power generator is demagnetized to decrease the internal induced voltage because alternating current output of the permanent magnet type electric power generator is lagging current. In an electric power generating apparatus for dispersed power supply including a permanent magnet type electric power generator having a plurality of windings inducing different effective values of induced voltages and individual rectifiers for rectifying alternating current outputs of the permanent magnet type electric power generator, a capacitor is connected in series between the individual rectifier and the alternating current output terminal of the winding inducing higher effective value of induced voltage among the plurality of windings in a manner that serial impedances of the capacitor and the permanent magnet type electric power generator become capacitive within the range of rated rotational speed of said permanent magnet type electric power generator.
摘要:
A cured resin for high-fraction lenses is disclosed, which is obtained by polymerizing a composition comprising (A) from 70 to 99 parts by weight of a sulfur-containing aromatic (meth)acrylate represented by formula (I): ##STR1## wherein R.sup.1 represents a hydrogen atom or a methyl group; R.sup.2 represents an alkylene group; Ar represents an arylene group, an arylene group substituted with a halogen atom except a fluorine atom, an aralkylene group, or an aralkylene group substituted with a halogen atom except a fluorine atom; X represents --O-- or --S--; Y represents --S-- or --SO.sub.2 -- when X is --O--, or Y represents --S--, --SO.sub.2 --, --CO--, an alkylene group, an aralkylene group, an alkylene ether group, an aralkylene ether group, an alkylene thioether group, or an aralkylene thioether group when X is --S--; m and n each represents an integer of from 1 to 5; and p represents 0 or an integer of from 1 to 10, (B) from 1 to 30 parts by weight of at least one mercapto compound selected from (B-1) a compound represented by formula (II): ##STR2## wherein R.sup.6 represents a methylene group or an ethylene group; R.sup.7 represents a hydrocarbon group having from 2 to 15 carbon atoms or an alkyl ether residue having from 2 to 15 carbon atoms; and r represents an integer of from 2 to 6, (B-2) a compound represented by formula (III): ##STR3## wherein W represents ##STR4## wherein s and u each represents an integer of from 1 to 8, and t represents 0 or an integer of 1 or 2, and (B-3) a compound represented by formula (IV): ##STR5## wherein R.sup.8 and R.sup.9 each represents an alkylene group having from 1 to 3 carbon atoms; a and b each represents 0 or 1; and c represents 1 or 2, and (C) up to 50 parts by weight of an ethylenically unsaturated monomer copolymerizable with the compound represened by formula (I). The resin has a high refractive index, high transparency, and excellent impact resistance.