Hydrogen tank liner material and hydrogen tank liner
View Patent ↗A hydrogen tank liner material comprises a polyamide resin composition which comprises (A) a polyamide resin at 85-40 wt %, (B) a copolyamide at 5-30 wt % and (C) an impact-resistant material at 10-30 wt % with respect to the total weight of the polyamide resin composition. Preferably, the (B) copolyamide is PA6/66 and the (C) impact-resistant material is an acid-modified ethylene/α-olefin-based copolymer. A hydrogen tank liner material with excellent gas barrier properties and superior impact resistance even at low temperatures is obtained.
1. A hydrogen tank liner obtained by molding a material comprising a polyamide resin composition which comprises 85-40 wt % of (A) polyamide 6, 5-30 wt % of (B) a copolyamide and 10-30 wt % of (C) an impact-resistant material, with respect to the total polyamide resin composition.
2. The hydrogen tank liner according to claim 1 , wherein the (B) copolyamide is PA6/66.
3. The hydrogen tank liner according to claim 1 , wherein the (C) impact-resistant material is an acid-modified ethylene/α-olefin-based copolymer.
4. The hydrogen tank liner according to claim 2 , wherein the (C) impact-resistant material is an acid-modified ethylene/α-olefin-based copolymer.
5. The hydrogen tank liner according to claim 1 , formed by monolayer injection molding.
6. The hydrogen tank liner according to claim 1 , obtained by forming two or more segments for a shaped article by monolayer injection molding and joining the segments together.
7. The hydrogen tank liner according to claim 5 , obtained by forming two or more segments for a shaped article by monolayer injection molding and laser welding the segments together.
8. A method for forming a hydrogen tank liner comprising forming a hydrogen tank liner from a polyamide resin composition comprising 85-40 wt % of (A) polyamide 6, 5-30 wt % of (B) a copolyamide and 10-30 wt % of (C) an impact-resistant material, with respect to the total polyamide resin composition.
9. The method according to claim 8 , wherein the (B) copolyamide is PA6/66.
10. The method according to claim 8 , wherein the (C) impact-resistant material is an acid-modified ethylene/α-olefin-based copolymer.
11. The method according to claim 8 , wherein forming is performed by monolayer injection molding.
12. The method according to claim 8 , wherein forming is performed by forming two or more segments for a shaped article by monolayer injection molding and joining the segments together.
13. The method according to claim 8 , wherein forming is performed by forming two or more segments for a shaped article by monolayer injection molding and laser welding the segments together.