摘要:
A polypropylene composition for a laminated and oriented film comprising (A) 73 to 97% by weight of a crystalline propylene random copolymer having a propylene content of 60 to 97% by weight, an ethylene content of 0 to 6% by weight and an .alpha.-olefin content of 3 to 40% by weight, (B) 2.5 to 17% by weight of a propylene- .alpha.-olefin random copolymer having a propylene content of 35 to 75% by weight and an .alpha.-olefin content of 25 to 65% by weight, and (c) 0.5 to 10% by weight of a crystalline propylene polymer. A polypropylene composition for a laminated and oriented film being film-formed for a long time without hurting a transparency and a low temperature heat-sealing property and having an excellent solvent resistance and an excellent hot-tack property, and a laminated and oriented film having this composition on a surface layer are provided.
摘要:
A propylene-.alpha.-olefin random copolymer composition for use in a laminated and oriented film. The composition includes: (A) from 75 to 95% by weight of a crystalline propylene random copolymer obtained by gas-phase polymerization of propylene and an .alpha.-olefin wherein the amount of components of the copolymer which are soluble in xylene at 20.degree. C. is less than 15% by weight, the propylene content is from 73 to 97% by weight, the .alpha.-olefin content is from 3 to 27% by weight, and (B) from 5 to 25% by weight of a propylene random copolymer of propylene and .alpha.-olefin, wherein the propylene content is from 50 to 60% by weight, and the .alpha.-olefin content is from 35 to 65 % by weight, wherein the amounts of components in the propylene-.alpha.-olefin random copolymer composition which are soluble in xylene at 20.degree. C. is less than 30% by weight.
摘要:
A propylene random copolymer composition which contains a mixture of 0.05-2.7% by weight of a crystalline propylene homopolymer (A) and 97.3-99.95% by weight of a random copolymer (B) of propylene and at least one .alpha.-olefin other than propylene which copolymer has a bound propylene content of 40-85% by weight and a Mw/Mn of not more than 5.5 meets both of the two mutually conflicting requirements of further improving the transparency inherent to polypropylene sheet and film, and attaining excellent solvent resistance.
摘要:
A planar lighting device in which workability of filling process of filler for heat radiation is improved and heat generated from a point-like light source is efficiently radiated so as to achieve higher brightness is provided.In a planar lighting device according to the present invention provided with a light guide plate and a point-like light source arranged on a side end face of the light guide plate, a radiator plate made of a bottom portion and a side wall is further provided, a circuit board on which the point-like light source is mounted is fixed along the side wall, and a recess portion holding a filler for heat radiation is formed at a position corresponding to the point-like light source in the side wall. By this arrangement, determination of an appropriate application amount of the filler for heat radiation and management and storage after application are facilitated and the workability of the filing process can be improved.
摘要:
A producing method of a coated film is provided and includes: coating a coating solution that contains a light-transmitting resin and a solvent on a support and, subsequently applying first and second drying steps for drying a coated coating solution. The first drying step is carried out in a drying zone where the maximum wind speed on a surface of a coated layer is 1 m/sec or more, and the second drying step is carried out in a drying zone having a temperature of 50° C. or more higher than a temperature in a zone where the first drying step is carried out.
摘要:
There are disclosed a process for producing a solid catalyst component and a catalyst for α-olefin polymerization, and a process for producing an α-olefin polymer, wherein the process for producing a solid catalyst component comprises the steps of: (1) reducing a specific titanium compound with an organomagnesium compound in the presence of an organosilicon compound having an Si—O bond (and an ester compound), thereby obtaining a solid product, and (2) contacting the solid product with a halogeno compound of the 14 group element, at least one member selected from the group consisting of an electron donor compound and an organic acid halide, and a compound having a Ti-halogen bond, thereby obtaining the solid catalyst component.
摘要:
There are disclosed a process for producing a solid catalyst component and a catalyst for α-olefin polymerization, and a process for producing an α-olefin polymer, wherein the process for producing a solid catalyst component comprises the steps of: (1) reducing a specific titanium compound with an organomagnesium compound in the presence of an organosilicon compound having an Si—O bond (and an ester compound), thereby obtaining a solid product, and (2) contacting the solid product with a halogeno compound of the 14 group element, at least one member selected from the group consisting of an electron donor compound and an organic acid halide, and a compound having a Ti-halogen bond, thereby obtaining the solid catalyst component.
摘要:
This invention implements a variable-length code pipeline decoding process as hardware by providing additional bit processing means, reducing the load on external control, and clarifying encoded data shift means. For this purpose, in order to determine a code length and additional bit length, two different decode processes are executed, the overall process is separated into three stages, i.e., a stage for shifting out a code word of encoded data, a decode processing stage, and a symbol determination & additional bit processing stage, and these stages are executed in a pipeline manner.
摘要:
There are disclosed: (1) a process for producing a catalyst for olefin polymerization, which comprises the step of contacting with one another: (i) a solid catalyst component containing at least titanium, magnesium and halogen atoms, (ii) an organoaluminum compound, and (iii) a compound selected from the group consisting of (a) an oxygen-containing compound having a structure wherein at least two hydrocarbyloxy groups are bound to the same carbon atom, and (b) a cyclic ketone compound, and (2) a process for producing an olefin polymer, which comprises the step of polymerizing an olefin in the presence of the above-mentioned catalyst.
摘要:
A polypropylene laminated film containing a crystalline polypropylene layer and, laminated on at least one side of the layer of the crystalline polypropylene, a layer of a copolymer of propylene and at least one .alpha.-olefin of from 4 to 10 carbon atoms having a specific composition, melt flow rate and molecular weight distribution in which the .alpha.-olefin content in the cold xylene soluble portion of the random copolymer is less than 1.7 times the .alpha.-olefin content in the copolymer and the random copolymer satisfies the mathematical expression, B.ltoreq.1.05A-10, wherein A is a weight percentage of the content of said at least one .alpha.-olefin having from 4 to 10 carbon atoms in the random copolymer and B is a weight percentage of the cold xylene soluble portion in the random copolymer, is superior in low temperature heat sealability and hot tack property and moreover has a good transparency, blocking resistance and printability, wherein the random copolymer is obtained by gas phase polymerization substantially in the absence of a liquid medium, and using a catalyst system comprising (i) a solid catalyst component containing magnesium, titanium and a halogen as essential constituents, (ii) an organoaluminum compound and (iii) an electron donative compound.