Mitsubishi Gas Chemical Company, Inc.

Yousuke Matsuyama

Takaaki Ogashiwa

Shigeru Horie

Kazuhiro Nakamura

Kenji Ishikura

Takayuki Kamei

Takuya Hasaki

Yoshihiro Kato

Reiki Akita

Noritsugu Umehara

Shintarou Oyama

The present invention provides a material for built up edge formation having a resin block containing a high molecular weight compound having a weight average molecular weight of 5&#xd7;10or higher and 1&#xd7;10or lower, a medium molecular weight compound having a weight average molecular weight of 1&#xd7;10or higher and lower than 5&#xd7;10, and a carbon.

Material for built-up edge formation and built-up edge formation method

An entry sheet for drilling comprising: a metallic foil; and a layer of a resin composition on at least one surface of the metallic foil, the resin composition comprising a polyolefin resin (A) and a water-soluble resin (B), wherein a content of the polyolefin resin (A) is 25 parts by mass or more and 50 parts by mass or less based on 100 parts by mass of the total of the polyolefin resin (A) and the water-soluble resin (B), a content of the water-soluble resin (B) is 50 parts by mass or more and 75 parts by mass or less based on 100 parts by mass of the total of the polyolefin resin (A) and the water-soluble resin (B), and the water-soluble resin (B) comprises a high-molecular-weight water-soluble resin (B-) having a weight average molecular weight of 2&#xd7;10or higher and 1.5&#xd7;10or lower.

Entry sheet for drilling and method for drilling processing using same

The present invention provides a cutting work method comprising a cutting work step of forming a through-groove passing through from a surface to a back face of a workpiece material by cutting the workpiece material with a cutting tool while bringing a lubricant material for assisting cutting process into contact with the cutting tool and/or the to-be-processed portion of the workpiece material, wherein the workpiece material comprises one or more materials selected from the group consisting of a metal, a fiber reinforced plastic, ceramic, and a composite material thereof.

Cutting work method and method for producing cut product

A lubricant material for assisting machining process comprising a polyethylene oxide-polypropylene oxide copolymer having a weight average molecular weight of 5.0&#xd7;10or more and 2.0&#xd7;10or less.

Lubricant material for assisting machining process, lubricant sheet for assisting machining process, and machining method

A lubricant material for assisting machining process comprising fullerene.

Lubricant material for assisting machining process, lubricant sheet for assisting machining process, and machining method using the same

Provided are a hole formation method enabling the formation of a high-quality hole even when a workpiece material is a difficult-to-machining metal material or a fiber-reinforced composite material and a drill bit used in the method. A drill bit includes at least one cutting edge and a face (a leading flank and a trailing flank) positioned in the vicinity of the cutting edge, and on the face, a recess exhibiting a prescribed planar shape (groove) is provided. A hole formation method includes a hole formation step of machining a portion to be processed of a workpiece material by means of drilling to form a hole while a lubricant material for assisting machining process is in contact with the portion to be processed, and in the hole formation step, the drill bit is used.

Drill bit and hole formation method

The present invention provides an entry sheet for drilling which provides higher hole position accuracy than that of a conventional entry sheet for drilling. The present invention provides an entry sheet for drilling, including a metal foil, and a layer including a resin composition and formed on at least one surface of the metal foil, wherein the resin composition includes a resin and tungsten disulfide as a solid lubricant, and the content of the tungsten disulfide included in the resin composition is 10 parts by mass to 200 parts by mass based on 100 parts by mass of the resin included in the resin composition.

Entry sheet for drilling

The present invention provides a cutting method comprising a cutting step of cutting a workpiece material with a cutting tool to thereby form a through-groove in the workpiece material, wherein in the cutting step, the through-groove is formed in the workpiece material by cutting the workpiece material with the cutting tool while contacting a cut-assisting lubricant with the contact portion of the cutting tool with the workpiece material and/or the contact portion of the workpiece material with the cutting tool, and the workpiece material comprises a fiber reinforced composite material.

Cutting method for fiber reinforced composite material

Entry sheet for drilling including a metallic foil and a layer of a resin composition, the layer formed on the metallic foil without interposing an adhesion layer, in which the layer of the resin composition has a peak attributable to a carbon atom-oxygen atom double bond appearing at 1700 to 1750 cmand a peak attributable to a carbon atom-oxygen atom single bond appearing at 1080 to 1300 cmin infrared spectroscopy, and when the absorbance at the peak attributable to the carbon atom-oxygen atom double bond appearing at 1700 to 1750 cmis represented by Abs(C&#x2550;O)L, and the absorbance at the peak of the carbon atom-oxygen atom single bond appearing at 1080 to 1300 cmis represented by Abs(C&#x2014;O)L, the layer of the resin composition has an absorbance ratio (C) of 0.12 to 1.80, the absorbance ratio (C) represented by the following expression (1).Absorbance ratio(C)=Abs(C&#x2550;O)L/Abs(C&#x2014;O)L&#x2003;&#x2003; Expression (1).

An entry sheet for drilling comprising: a metallic foil; and a layer of a resin composition, the layer formed on the metallic foil without interposing an adhesion layer, wherein the surface of the layer of the resin composition, the surface being in contact with the metallic foil, has a dispersion term &#x3b3;SD of surface free energy in a range from 27.0 to 37.0 mJ/mand a polar term &#x3b3;SP of the surface free energy in a range from 0 to 5.0 mJ/m.

The present invention provides a lubricant material for assisting machining process comprising a high molecular weight compound (A) having a weight average molecular weight of 5&#xd7;10or higher and 1&#xd7;10or lower, a medium molecular weight compound (B) having a weight average molecular weight of 1&#xd7;10or higher and lower than 5&#xd7;10, and a carbon (C) having an average particle size of 100 &#x3bc;m or larger.

Lubricant material for assisting machining process and machining method

The present invention provides an entry sheet for drilling excellent in hole position accuracy compared with the conventional entry sheet for drilling. Such an entry sheet for drilling is an entry sheet for drilling comprising metallic support foil and a layer comprising a resin composition formed on at least one surface of the metallic support foil, in which the resin composition contains a resin and 70 parts by mass to 130 parts by mass of molybdenum disulfide based on 100 parts by mass of the resin, and the layer comprising the resin composition has a thickness in a range from 0.02 to 0.3 mm.

A process for the production of an entry sheet for drilling a printed wiring board material, which process comprises forming a multi-layered water-soluble resin composition layer on at least one surface of a metal foil, wherein an aqueous solution of a water-soluble resin composition is applied to the metal foil, dried and solidified to form one water-soluble resin composition layer, the application, drying and solidification of the aqueous solution of the water-soluble resin composition are repeated at least once to form at least one water-soluble resin composition layer on the above one water-soluble resin composition layer, the multi-layered water-soluble resin composition layer is composed of these water-soluble resin composition layers, the multi-layered water-soluble resin composition layer has a thickness of at least 50 &#x3bc;m and is almost free from air bubbles, and an entry sheet for drilling a printed wiring board material obtained by the above process.

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Yonezawa, Japan

Yousuke Matsuyama