FILM
An embodiment is a film comprising a first polymeric resin; and a second polymeric resin, which are heterogeneous resins, wherein the first polymeric resin includes polyamide-based repeating units and polyether-based repeating units, and the second polymeric resin includes any one selected from the group consisting of hydroxyl groups, acetyl groups, and combinations thereof within its branch, and wherein the haze value of the film is 3% or less after being left at 60° C. for 7 days. The film of the embodiment can have better optical properties because the change of haze is suppressed even when exposed to a high temperature or ultraviolet environment for a long time and has excellent utilization as a surface protection film.
1 . A film comprising a first polymeric resin and a second polymeric resin which are heterogeneous resins,
wherein the first polymeric resin comprises polyamide-based repeating units and polyether-based repeating units, and the second polymeric resin comprises any one selected from the group consisting of hydroxyl groups, acetyl groups, and combinations thereof within its branches, and
wherein the film has a haze value of 3% or less, after being exposed to 60° C. for 7 days.
2 . The film of claim 1 , wherein the film has a haze value difference of 1% or less before and after being exposed to 60° C. for 7 days.
3 . The film of claim 1 , wherein the polyether-based repeating unit comprises any one of tetramethylene oxide residues, ethylene oxide residues, and propylene oxide residues.
4 . The film of claim 1 , wherein the film comprises 20 wt % or more of the polyether-based repeating units, based on the total weight of the first polymeric resin.
5 . The film of claim 1 , wherein the film comprises 2.5 parts per weight or more of the second polymeric resin based on 1 parts per weight of the first polymeric resin.
6 . The film of claim 1 , further comprising plasticizers,
wherein the plasticizers are one selected from triethylene glycol bis 2-ethylhexanoate (3G8), tetraethylene glycol diheptanoate (4G7), triethylene glycol bis 2-ethylbutyrate (3GH), triethylene glycol bis 2-heptanoate (3G7), dibutoxyethoxyethyl adipate (DBEA), butyl carbitol adipate (DBEEA), dibutyl sebacate (DBS), bis 2-hexyl adipate (DHA), triethylene glycol di-2-ethyl butylate, triethylene glycol di-2-ethylhexanoate, and triethylene glycol di-n-heptanoate.
7 . The film of claim 6 , wherein the film comprises 0.5 parts per weight or less of the plasticizer, based on 1 parts per weight of the second polymeric resin.
8 . The film of claim 1 , wherein the film comprises at least 2 wt % of hydroxyl groups of the second polymeric resin, based on the total weight of the second polymeric resin.
9 . The film of claim 1 , wherein the film has a haze value of 3% or less at room temperature.
10 . The film of claim 1 , wherein the film is a surface protective film.