Method for packaging a photosensitive film roll, resin case therefor, method for recovering and reusing the case, and photosensitive film roll package and method for conveying the same

A method for packaging a photosensitive film roll, comprising the steps of:

• (a) forming a photosensitive film roll by winding, around a core, a photosensitive film comprising a supporting film and a photosensitive resin composition layer formed on the supporting film, wherein the photosensitive resin composition layer comprises a photosensitive resin composition containing a binder polymer and a photopolymerizable compound having at least one polymerizable ethylenically unsaturated group within a molecule and a photopolymerization initiator;
• (b) packaging the photosensitive film roll with a reusable case, wherein the case is collapsible without generating any waste materials that must be thrown away after the case is collapsed, and wherein the case consists of a resin having a lower surface energy than the photosensitive resin composition and the binder polymer is a copolymer comprising components selected from the group consisting of (i) at least methacrylic acid alkyl ester and methacrylic acid as monomers, (ii) at least methacrylic acid alkyl ester and acrylic acid as monomers, (iii) at least acrylic acid alkyl ester and methacrylic acid as monomers, and (iv) at least acrylic acid alkyl ester and acrylic acid as monomers;
• and
• (c) after using the photosensitive film roll, collapsing the resin case without generating any waste materials.

A method for packaging a photosensitive film roll, comprising the steps of:

• (a) forming a photosensitive film roll by winding, around a core, a photosensitive film comprising a supporting film and a photosensitive resin composition layer formed on the supporting film, wherein the photosensitive resin composition layer comprises a photosensitive resin composition containing a binder polymer and a photopolymerizable compound having at least one polymerizable ethylenically unsaturated group within a molecule and a photopolymerization initiator, and wherein the photosensitive resin composition layer is soft and exhibits tackiness at room temperature and the photosensitive film is suitable for use in manufacturing a printed wiring board;
• (b) packaging the photosensitive film roll in a reusable case, wherein the case is collapsible without generating any waste materials that must be thrown away after the case is collapsed, and wherein the case consists of a resin having a lower surface energy than the photosensitive resin composition and the binder polymer is a copolymer comprising components selected from the group consisting of (i) at least methacrylic acid alkyl ester and methacrylic acid as monomers, (ii) at least methacrylic acid alkyl ester and acrylic acid as monomers, (iii) at least acrylic acid alkyl ester and methacrylic acid as monomers, and (iv) at least acrylic acid alkyl ester and acrylic acid as monomers;
• and
• (c) after using the photosensitive film roll, collapsing the resin case without generating any waste materials.

A reusable resin case packaging a photosensitive film roll, the photosensitive film roll having been formed by winding, around a core, the photosensitive film, wherein the photosensitive film comprises:

• a supporting film;
• a photosensitive resin composition layer formed on the supporting film, wherein the photosensitive resin composition layer comprises a photosensitive resin composition containing a binder polymer and a photopolymerizable compound having at least one polymerizable ethylenically unsaturated group within a molecule and a photopolymerization initiator;
• and
• a protective film covering the photosensitive resin composition layer;
• wherein the reusable case is collapsible without generating any waste materials that must be thrown away after the case is collapsed, and wherein the resin case consists of a resin having a lower surface energy than the photosensitive resin composition and the binder polymer is a copolymer comprising components selected from the group consisting of (i) at least methacrylic acid alkyl ester and methacrylic acid as monomers, (ii) at least methacrylic acid alkyl ester and acrylic acid as monomers, (iii) at least acrylic acid alkyl ester and methacrylic acid as monomers, and (iv) at least acrylic acid alkyl ester and acrylic acid as monomers.

A method for packaging a photosensitive film roll, comprising the steps of:

• (a) forming a first photosensitive film roll by winding, around a core, a photosensitive film comprising a supporting film and a photosensitive resin composition layer formed on the supporting film, wherein the photosensitive resin composition layer is soft and exhibits tackiness at room temperature and the photosensitive film is suitable for use in manufacturing a printed wiring board;
• (b) packaging the first photosensitive film roll with a reusable resin case, wherein the resin case is collapsible without generating any waste materials that must be thrown away after the case is collapsed;
• (c) after using the first photosensitive film roll, collapsing the resin case without generating any waste materials including dust;
• and
• (d) reusing the resin case to package a second photosensitive film roll suitable for use in manufacturing a printed wiring board, wherein
• the photosensitive resin composition layer comprises a photosensitive resin composition containing a binder polymer and a photopolymerizable compound having at least one polymerizable ethylenically unsaturated group within a molecule and a photopolymerization initiator;
• and
• wherein the resin case consists of a resin having a lower surface energy than the photosensitive resin composition and the binder polymer is a copolymer comprising components selected from the group consisting of (i) at least methacrylic acid alkyl ester and methacrylic acid as monomers, (ii) at least methacrylic acid alkyl ester and acrylic acid as monomers, (iii) at least acrylic acid alkyl ester and methacrylic acid as monomers, and (iv) at least acrylic acid alkyl ester and acrylic acid as monomers, and
• the surface energy of the resin of the resin case is 18 to 37 dyne/cm.