Reel member and film accommodating body

Abstract

The reel member of the present invention includes a core portion 2 , which is in the form of a cylinder and is capable of traverse winding an adhesive film, where the adhesive film contains a base film and an adhesive layer disposed on the base film, first and second flange portions 11 and 12 respectively provided at both edges of the core portion 2 , and first and second guide portions 21 and 22 , which are respectively provided at inner sides of the first and second flange portions 11 and 12 over entire circumferences thereof and are configured to guide the adhesive film. The first and second guide portions 21 and 22 each have a tapered shape, a width of which increases along a direction from the core portion 2 towards a rim of the first or second flange portion 11 or 12.

1 . A reel member, comprising:
 a core portion, which is in the form of a cylinder and is capable of traverse winding an adhesive film, where the adhesive film contains a base film, and an adhesive layer disposed on the base film;   a pair of flange portions, respectively provided at both edges of the core portion; and   a pair of guide portions, which are respectively provided at inner sides of the flange portions over entire circumferences thereof and are configured to guide the adhesive film,   wherein the guide portions each have a tapered shape, a width of which increases along a direction from the core portion towards a rim of the flange portion.   
     
     
         2 . The reel member according to  claim 1 , wherein an angle θ of a surface of each of the guide portions with a rotational axis direction of the core portion satisfies the following relationship:
   θ<tan −1 ( Y/X )
 
 where X is a distance of the adhesive layer projected from the adhesive film in the rotational axis direction of the core portion when the adhesive film is wound around the reel member, and Y is a thickness of the base film of the adhesive film. 
 
     
     
         3 . A film accommodating body, comprising:
 a reel member; and   an adhesive film roll, which is an adhesive film wound around a core portion of the reel member with traverse winding,   wherein the reel member comprises:   the core portion, which is in the form of a cylinder and is capable of traverse winding the adhesive film, where the adhesive film contains a base film, and an adhesive layer disposed on the base film;   a pair of flange portions, respectively provided at both edges of the core portion: and   a pair of guide portions, which are respectively provided at inner sides of the flange portions over entire circumferences thereof and are configured to guide the adhesive film,   wherein the guide portions each have a tapered shape, a width of which increases along a direction from the core portion towards a rim of the flange portion, and   wherein the adhesive films respectively provided at both edges of each layer of the adhesive film roll are supported in a state where the base film of each adhesive film is in contact with a surface of the guide portion.   
     
     
         4 . The film accommodating body according to  claim 3 , wherein an
 angle θ of a surface of each of the guide portions with a rotational axis direction is the core portion satisfies the following relationship:
   θ<tan −1 ( Y/X )
 
   where X is a distance of the adhesive layer projected from the adhesive film in the rotational axis direction of the core portion when the adhesive film is wound around the reel member, and Y is a thickness of the base film of the adhesive film.