Asahi Kasei Kogyo Kabushiki Kaisha

Asahi Kasei Kabushiki Kaisha

Owens Corning Fiberglas Technology, Inc.

Kenji Takasa

Satoshi Iijima

Yuuichi Arito

Shinya Hamasaki

Makoto Honda

Taku Suetomi

Yusuke Shigemori

Yuichi Arito

Keizo Hirakawa

Tsumoru Kuwabara

Hiroji Nishimaru

Masakatsu Nakamura

Thumoru Kuwabara

A reflecting sheet of the invention is comprised of at least two, a surface layer portion and an inner layer portion, or more layers, and is characterized in that the surface layer portion contains at least a thermoplastic resin (C), the inner layer portion contains a thermoplastic resin (A), and at least one kind of thermoplastic resin (B) incompatible with the thermoplastic resin (A), reflected light intensity in a vertical direction has anisotropy by an incident direction when light is incident at an incident angle of 60 degrees with respect to the vertical direction of a plane of the reflecting sheet in the entire reflecting sheet including the surface layer portion and the inner layer portion, and that a ratio L/L, which is a ratio of reflected light intensity Lin the vertical direction in an incident direction Awhere the reflected light intensity in the vertical direction is the highest to reflected light intensity Lin the vertical direction in an incident direction Aorthogonal to the incident direction A, is 1.2 or more.

Reflecting sheet

A reflecting sheet of the invention includes at least a surface layer portion and an inner layer portion, where the surface layer portion contains at least 0.3 g/mto 20 g/mof an inorganic powder and a polyolefin resin (C), the inner layer portion contains a polyolefin resin (A) and at least one kind of resins (B) incompatible with the polyolefin resin (A) at temperatures enabling stretching of the polyolefin resin(A), the surface layer portion meets (n&#x2212;n)/n&#x2267;0.20 (n: refractive index of the inorganic powder, n: refractive index of the polyolefin resin (C)), and the inner layer portion has voids.

To provide a type of phenol foam characterized by the fact that the phenol foam is formed by using a hydrocarbon as the foaming agent. The phenol foam has excellent heat-insulating performance, high compressive strength and other mechanical strengths, improved brittleness and is friendly to the environment of the earth.

Phenol foam

A phenolic foam having a density of from 10 kg/m to 100 kg/m and comprising a phenolic resin base part and a cellular part most of which is made up of a large number of fine cells, wherein the fine cells contain a hydrocarbon and have an average cell diameter of 5 &mgr;m to 200 &mgr;m, and the cell walls of at least most of the fine cells are formed of a smooth surface of the phenolic resin base. While the blowing agent is a hydrocarbon, the foam has a thermal conductivity comparable to that of a conventional foam made with a flon blowing agent, undergoes no change in thermal conductivity with time, exhibits excellent mechanical strength such as compressive strength, and has reduced brittleness.

Phenolic foam

This present invention provides a biaxially oriented film of a polyoxymethylene polymer having the main part of each of the main chains thereof substantially composed of repeating units of the oxymethylene group, --CH.sub.2 --O--, which biaxially oriented polyoxymethylene polymer film is characterized by the fact that the crystallinity thereof measured by the density method is in the range of 75 to 95% and the degree of crystal orientation measured by the X-ray diffraction method in the two directions of end and edge are each in the range of 80 to 98%. This film possesses a high modulus of elasticity, outstanding dimensional stability, and low equilibrium water absorption ratio and, therefore, it is particularly suitable as a base film of a magnetic recording medium. This film is produced by accurately controlling the orientation conditions and other processing conditions.

Biaxially oriented polyoxymethylene film

There is disclosed a biaxially oriented film formed of film forming composition comprising a polyoxymethylene polymer in which the major constituent of the main chains of said polymer each of consists substantially of repeating units of oxymethylene group --CH.sub.2 --O--, said film being characterized in that, when said film is remelted at a temperature above the melting point of said film and the resulting melt is recrystallized isothermally at 140.degree. C. into a solid in film form, the number of polyoxymethylene spherulites in the crystal structure at the surface of the resulting film would be at least 50 per 0.1 mm.sup.2 area of the resulting film surface, as measured with a polarizing microscope through cross-polarizers, and a process for manufacturing the same.

The present invention provides a biaxially oriented film of a polyoxymethylene polymer having the main part of each of the main chains thereof substantially composed of repeating units of the oxymethylene group, --CH.sub.2 --O--, which biaxially oriented polyoxymethylene polymer film is characterized by the fact that the crystallinity thereof measured by the density method is in the range of 75 to 95% and the degree of crystal orientation measured by the X-ray diffraction method in the two directions of end and edge are each in the range of 80 to 98%. This film possesses a high modulus of elasticity, outstanding dimensional stability, and low equilibrium water absorption ratio and, therefore, it is particularly suitable as a base film of a magnetic recording medium. This film is produced by accurately controlling the orientation conditions and other processing conditions.

A pressure-resistant paper vessel having highly improved gas barrier property is provided. The paper vessel has at least one layer having a gas barrier film/paper/gas barrier film laminate structure formed by laminating both the surfaces of paper with a gas barrier plastic film having a carbon dioxide gas permeability of not more than 200. The pressure resistance of the paper vessel at normal temperature is higher than atmospheric pressure but not higher than 10 kg/cm.sup.2 G.

Pressure-resistant paper vessel

A process for separating indole from a mixture of indole with at least one hydrocarbon or its derivative which comprises the steps of contacting the mixture with a faujasite structured zeolite to selectively adsorb indole on the zeolite and contacting a desorbent A selected from the group consisting of C.sub.2-10 aliphatic or C.sub.7-10 aromatic ether compounds, C.sub.2-10 aliphatic ester compounds and C.sub.3-10 aliphatic ketone compounds with the indole-adsorbed zeolite to separate indole and the process which comprises, in addition, the step of contacting at least one desorbent B of the formula, ##STR1## wherein R.sup.1 is a C.sub.1-3 alkyl group, and

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Yokosuka, Japan

Kenji Takasa