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-1) having a weight average molecular weight of 210.sup.5 or higher and 1.510.sup.6 or lower.

Prior to lining a main pipe, a marker configured as a receiving coil 33 is disposed at the center 12b of a lateral pipe opening or at a position separated a predetermined distance S from the center thereof. An in-pipe robot 20 is loaded coaxially or separated by the predetermined distance with a rotatable drilling blade 31 for drilling a hole in a main pipe lining material 13 that blocks the lateral pipe opening and a transmitting coil 40 that detects a marker position. After lining the main pipe, the drilling blade and the transmitting coil are moved in conjunction in the main pipe longitudinal direction and in the main pipe circumferential direction to drill a hole in the main pipe lining material at a position where the electromagnetic coupling of both the coils becomes maximum. The center of rotation of the drilling blade coincides with the center of the lateral pipe opening at the position where the electromagnetic coupling of both the coils becomes maximum, so that a hole can be drilled precisely in the main pipe lining material in alignment with the lateral pipe opening.

Prior to lining a main pipe, a marker configured as a receiving coil 33 is disposed at the center 12b of a lateral pipe opening or at a position separated a predetermined distance S from the center thereof. An in-pipe robot 20 is loaded coaxially or separated by the predetermined distance with a rotatable drilling blade 31 for drilling a hole in a main pipe lining material 13 that blocks the lateral pipe opening and a transmitting coil 40 that detects a marker position. After lining the main pipe, the drilling blade and the transmitting coil are moved in conjunction in the main pipe longitudinal direction and in the main pipe circumferential direction to drill a hole in the main pipe lining material at a position where the electromagnetic coupling of both the coils becomes maximum. The center of rotation of the drilling blade coincides with the center of the lateral pipe opening at the position where the electromagnetic coupling of both the coils becomes maximum, so that a hole can be drilled precisely in the main pipe lining material in alignment with the lateral pipe opening.

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 cm.sup.1 and a peak attributable to a carbon atom-oxygen atom single bond appearing at 1080 to 1300 cm.sup.1 in infrared spectroscopy, and when the absorbance at the peak attributable to the carbon atom-oxygen atom double bond appearing at 1700 to 1750 cm.sup.1 is represented by Abs(CO)L, and the absorbance at the peak of the carbon atom-oxygen atom single bond appearing at 1080 to 1300 cm.sup.1 is represented by Abs(CO)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(CO)L/Abs(CO)L Expression (1)

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 cm.sup.1 and a peak attributable to a carbon atom-oxygen atom single bond appearing at 1080 to 1300 cm.sup.1 in infrared spectroscopy, and when the absorbance at the peak attributable to the carbon atom-oxygen atom double bond appearing at 1700 to 1750 cm.sup.1 is represented by Abs(CO)L, and the absorbance at the peak of the carbon atom-oxygen atom single bond appearing at 1080 to 1300 cm.sup.1 is represented by Abs(CO)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(CO)L/Abs(CO)L 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 SD of surface free energy in a range from 27.0 to 37.0 mJ/m.sup.2 and a polar term SP of the surface free energy in a range from 0 to 5.0 mJ/m.sup.2.

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 SD of surface free energy in a range from 27.0 to 37.0 mJ/m.sup.2 and a polar term SP of the surface free energy in a range from 0 to 5.0 mJ/m.sup.2.

Disclosed herein is an apparatus for processing a substrate that forms a hole in a substrate while reducing a burr in the hole so that a module device can be inserted into the hole to reduce the thickness of a display device, and the display device using the apparatus. The apparatus for processing the substrate comprises a body configured to operably be rotatable, and a cylindrical cutting tip at an end of the body. The bottom surface of the cutting tip is in an acute angle with respect to a contact surface of the substrate to allow formation of a groove at the substrate.

Disclosed herein is an apparatus for processing a substrate that forms a hole in a substrate while reducing a burr in the hole so that a module device can be inserted into the hole to reduce the thickness of a display device, and the display device using the apparatus. The apparatus for processing the substrate comprises a body configured to operably be rotatable, and a cylindrical cutting tip at an end of the body. The bottom surface of the cutting tip is in an acute angle with respect to a contact surface of the substrate to allow formation of a groove at the substrate.

A candle assembly for making a personalized scented candle including a candle body comprises a coring device that is configured to remove a core from the candle body, the coring device including (i) a leading edge that selectively extends into the candle body; and (ii) a plurality of measurement markers that measure a depth of the leading edge within the candle body. The coring device can be configured to remove the core from the candle body to form a cavity in the candle body. Additionally, the measurement markers can be utilized to determine a depth of the cavity formed in the candle body by the coring device.