Abstract: A transparent film, the back-face of which has excellent resistance to scratch and printability, and a surface protection film which has such a transparent film are provided. A transparent film 10 has a substrate layer 12 formed of a transparent resin material, and a back-face layer 14 with a thickness of 1 ?m or less provided on a first face 12A thereof. A percent change in coefficient of friction ?? is less than 10% for the transparent film 10 when the percent change is determined from a coefficient of friction ?50 of the back-face layer after being conserved at 50° C. and 15% RH for three days and a coefficient of friction ?80 of the back-face layer after being conserved at 80° C. and 80% RH for three days, with an absolute value of difference between the two coefficients of friction |?80??50| being divided by the smaller value of the two coefficients of friction.

Abstract: The object of the present invention is provision of a surface protection sheet for laser processing to be applied to the surface on the opposite side of the laser beam irradiation face, which can protect the surface of an application object, and does not allow easy development of a dross during laser cutting processing. According to the present invention, a surface protection sheet 1 for laser processing to be applied to the surface on the opposite side of the laser beam irradiation face 2a of a workpiece 2 during a cutting process by irradiation of a laser beam 6 on the workpiece 2 is provided, which contains a substrate layer and an adhesive layer formed on one surface of the substrate layer, wherein the substrate layer is made of a resin material having a melt viscosity measured based on JIS K7199 (1999) at 290° C. of not more than 200 Pa·s, and has a thickness of 0.01-0.12 mm.

Abstract: There are provided an optical surface protection film capable of permitting even a visual inspection of a coated body having a fine roughness, such as a prism sheet, to be performed under the condition that the protection film is attached to the coated body and excelling in adhesion reliability without an optical adverse effect on the coated body, and an optical film with the surface protection film. The optical surface protection film (1) has a base material layer (10) and an adhesive layer (12) stacked on one surface of the base material layer. The surface of the base material layer (10) on the side of the adhesive layer (12) has an arithmetic surface average roughness (Ra2) of 0.65 ?m or less. The other surface of the base material layer (10) has an arithmetic surface average roughness (Ra1) of 0.6 ?m or more.

Abstract: There are provided an optical surface protection film capable of permitting even a visual inspection of a coated body having a fine roughness, such as a prism sheet, to be performed under the condition that the protection film is attached to the coated body and excelling in adhesion reliability without an optical adverse effect on the coated body, and an optical film with the surface protection film. The optical surface protection film (1) has a base material layer (10) and an adhesive layer (12) stacked on one surface of the base material layer. The surface of the base material layer (10) on the side of the adhesive layer (12) has an arithmetic surface average roughness (Ra2) of 0.65 ?m or less. The other surface of the base material layer (10) has an arithmetic surface average roughness (Ra1) of 0.6 ?m or more.

Abstract: A process for protecting a surface of a metal layer or a metal oxide layer including providing a protective film containing a base material and a pressure-sensitive adhesive layer formed thereon, wherein the surface of the pressure-sensitive adhesive layer has a contact angle with methylene iodide as measured just after contact, ?1, of 70° or smaller and a change in contact angle with methylene iodide through 30-second standing, ??, of 8% or less.

Abstract: A transparent film, the back-face of which has excellent resistance to scratch and printability, and a surface protection film which has such a transparent film are provided. A transparent film 10 has a substrate layer 12 formed of a transparent resin material, and a back-face layer 14 with a thickness of 1 ?m or less provided on a first face 12A thereof. A percent change in coefficient of friction ?? is less than 10% for the transparent film 10 when the percent change is determined from a coefficient of friction ?50 of the back-face layer after being conserved at 50° C. and 15% RH for three days and a coefficient of friction ?80 of the back-face layer after being conserved at 80° C. and 80% RH for three days, with an absolute value of difference between the two coefficients of friction |?80??50| being divided by the smaller value of the two coefficients of friction.

Abstract: A work subject material comprising a metal plate for use in punching and/or bending and, attached thereto, a surface protection sheet, characterized in that the surface protection sheet comprises a support base material and an adhesive layer superimposed on one surface of the support base material and that the surface protection sheet exhibits a coefficient (I) not more than 21.0, a coefficient (II) not less than 4.0 and a coefficient (III) not more than 1.5, which are calculated by the following formulae: (I)=thickness of support base material (mm)×elongation at break of surface protection sheet (%); (II)=thickness of support base material (mm)×strength at break of surface protection sheet (N/20 mm); and (III)=coefficient (I)/coefficient (II).

Abstract: A protective sheet 10 is provided which exhibits excellent properties as a protective sheet and a satisfactory handleability. The protective sheet 10 is formed of a substrate 1 which is a plastic film and a pressure-sensitive adhesive layer 2 which is provided on one side of the substrate, and satisfies all of the following properties: (A) the total flexural rigidity DTrt at 25° C. in a first direction and a second direction is from 3.0×10?6 to 20×10?6 Pa·m3; (B) the total flexural rigidity DTht at 80° C. is from 0.10×10?6 to 1.2×10?6 Pa·m3; (C) the flexural rigidity ratio DR, defined as DTrt/DTht, is from 3.0 to 80; and (D) the tensions T1rt and T2rt at 25° C. when stretched 10% in the first direction and the second direction respectively are at least 5.0 N/10 mm.

Abstract: The object of the present invention is provision of a surface protection sheet for laser processing to be applied to the surface on the opposite side of the laser beam irradiation face, which can protect the surface of an application object, and does not allow easy development of a dross during laser cutting processing. According to the present invention, a surface protection sheet 1 for laser processing to be applied to the surface on the opposite side of the laser beam irradiation face 2a of a workpiece 2 during a cutting process by irradiation of a laser beam 6 on the workpiece 2 is provided, which contains a substrate layer and an adhesive layer formed on one surface of the substrate layer, wherein the substrate layer is made of a resin material having a melt viscosity measured based on JIS K7199 (1999) at 290° C. of not more than 200 Pa·s, and has a thickness of 0.01-0.12 mm.

Abstract: There are provided an optical surface protection film capable of permitting even a visual inspection of a coated body having a fine roughness, such as a prism sheet, to be performed under the condition that the protection film is attached to the coated body and excelling in adhesion reliability without an optical adverse effect on the coated body, and an optical film with the surface protection film. The optical surface protection film (1) has a base material layer (10) and an adhesive layer (12) stacked on one surface of the base material layer. The surface of the base material layer (10) on the side of the adhesive layer (12) has an arithmetic surface average roughness (Ra2) of 0.65 ?m or less. The other surface of the base material layer (10) has an arithmetic surface average roughness (Ra1) of 0.6 ?m or more.

Abstract: An object of the present invention is to provide a pressure-sensitive adhesive composition in which electrification of a pressure-sensitive adhesive sheet can be prevented upon peeling, and staining property on an adherend can be reduced, and an antistatic pressure-sensitive sheet and surface protecting film using this. There is provided a pressure-sensitive composition comprising an ionic liquid and a polymer having a glass transition temperature Tg of 0° C. or lower as a base polymer.

Abstract: An inexpensive surface-protective film which is excellent in the ability to protect an adherend (in particular, optical sheet). With the surface-protective film (pressure-sensitive adhesive sheet) adherent to an adherend (in particular, optical sheet), an inspection of the adherend for defects can be made with satisfactory precision. Also provided is an inexpensive surface-protective film which prevents an adherend (in particular, optical member such as optical sheet) from being electrostatically charged during the processing or transportation of the adherend (in particular, optical sheet), and has the function of preventing fouling. The protective films each is a removable pressure-sensitive adhesive sheet which comprises a base layer, a pressure-sensitive adhesive layer formed on one side thereof, and an antistatic layer formed on the other side, characterized in that the antistatic layer contains a polymeric antistatic agent comprising an olefin block and a hydrophilic block.

Abstract: A release resin composition that is excellent in thermal stability, for example, during extrusion molding and does not cause problems such as smoking and foaming during preparation of a compound product or extrusion molding and further does not contaminate metal rollers. The release resin composition can be formed into a release layer that does not cause migration of impurities to an adhesive layer being in direct contact with the release layer and therefore does not decrease the adhesive properties of the adhesive layer. The release resin composition includes a release agent (A) of which main component is a polymer compound having a weight average molecular weight of 10000 to 1000000 and containing an aliphatic group having 8 to 30 carbon atoms and includes a thermoplastic polymer (B) containing an olefin monomer and/or a polar monomer as a constitutional unit, wherein the amount of the release agent (A) is 0.1 to 20 parts by weight to 100 parts by weight of the thermoplastic polymer (B).

Abstract: The object of the present invention is provision of a surface protection sheet for laser processing to be applied to the surface on the opposite side of the laser beam irradiation face, which can protect the surface of an application object, and does not allow easy development of a dross during laser cutting processing. According to the present invention, a surface protection sheet 1 for laser processing to be applied to the surface on the opposite side of the laser beam irradiation face 2a of a workpiece 2 during a cutting process by irradiation of a laser beam 6 on the workpiece 2 is provided, which contains a substrate layer and an adhesive layer formed on one surface of the substrate layer, wherein the substrate layer is made of a resin material having a melt viscosity measured based on JIS K7199 (1999) at 290° C. of not more than 200 Pa·s, and has a thickness of 0.01-0.12 mm.

Abstract: The present invention provides a pressure-sensitive adhesive which can prevent electrification of a non-electrification-prevented adherend upon peeling, suppresses occurrence of peeling off even with time or via treatment under a high temperature, and is excellent in adhesion reliance, as well as an antistatic pressure-sensitive adhesive sheet, and surface protecting film using this. The pressure-sensitive adhesive composition of the present invention contains an ionic liquid, and a polymer having a glass transition temperature of Tg of 0° C. or lower as a base polymer, as well as an ethylene oxide group-containing compound and/or a surfactant.

Abstract: A work subject material comprising a metal plate for use in punching and/or bending and, attached thereto, a surface protection sheet, characterized in that the surface protection sheet comprises a support base material and an adhesive layer superimposed on one surface of the support base material and that the surface protection sheet exhibits a coefficient (I) not more than 21.0, a coefficient (II) not less than 4.0 and a coefficient (III) not more than 1.5, which are calculated by the following formulae: (I) thickness of support base material (mm)×elongation at break of surface protection sheet (%); (II)=thickness of support base material (mm)×strength at break of surface protection sheet (N/20 mm); and (III)=coefficient (I)/coefficient (II).

Abstract: A method is to manufacture a surface protective film for transparent conductive films having a rate of thermal shrinkage of no more than 0.9% in both MD (machine direction) and TD (width direction) as measured after being heated at 150° C. for 1 hour. The method includes: providing a base material film; applying an adhesive on one surface of the base material film; and applying a drawing tension of no more than 80 N per width of 1 m of the base material film under conditions of a temperature of 100° C. through 150° C. and a residence time of 20 through 120 seconds, thereby removing a residual stress and simultaneously drying the adhesive.

Abstract: To present a surface protecting film low in peeling strength (rewinding force) on own back side even by using a rubber material pressure-sensitive adhesive, and excellent in adhesion reliance on an adherend, and an optical film using such surface protecting film. A surface protecting film having a pressure-sensitive adhesive layer laminated at one side of a base layer, and a backside treatment layer at other side of the base layer, in which the pressure-sensitive adhesive layer is formed of a rubber material, and the backside treatment layer is formed of an acrylic silicone graft polymer.

Abstract: A protective film contains a base material and a pressure-sensitive adhesive layer formed thereon, wherein the surface of the pressure-sensitive adhesive layer has a contact angle with methylene iodide as measured just after contact, ?1, of 70° or smaller and a change in contact angle with methylene iodide through 30-second standing, ??, of 8% or less.

Abstract: A process for protecting a surface of a metal layer or a metal oxide layer including providing a protective film containing a base material and a pressure-sensitive adhesive layer formed thereon, wherein the surface of the pressure-sensitive adhesive layer has a contact angle with methylene iodide as measured just after contact, ?1, of 70° or smaller and a change in contact angle with methylene iodide through 30-second standing, ??, of 8% or less.