Retroreflective piping sheet for vehicle interior decoration and manufacturing method thereof
View Patent ↗A retroreflective piping sheet for vehicle interior decoration includes a fabric layer having a fabric circular-knitted from a ply yarn of polyester and spandex, a retroreflective layer, disposed on a one side of the fabric layer, having a plurality of glass beads therein and a hot melt adhesive layer disposed on the other side side, opposite to the one side, of the fabric layer.
1 . A retroreflective piping sheet for vehicle interior decoration, the piping sheet comprising:
a fabric layer having a fabric circular-knitted from a ply yarn of polyester and spandex;
a retroreflective layer, disposed on one side of the fabric layer, having a plurality of glass beads therein;
a hot melt adhesive layer disposed on the other side, opposite to the one side, of the fabric layer; and
A an adhesive layer is provided between the fabric layer and the retroreflective layer,
wherein the adhesive layer comprises a synthetic resin adhesive comprising a polyurethane adhesive and contains about 15% to 30% of a phosphorus-based or bromine-based flame retardant resin.
2 . The piping sheet of claim 1 , wherein the hot melt adhesive layer, together with a retroreflective fabric comprising the fabric layer, the adhesive layer, and the A retroreflective layer, is wrapped around, and bonded to, a piping core.
3 . The piping sheet of claim 1 , wherein each of the plurality of glass beads is formed in a spherical shape having a size of about 30 to 100 μm and a refractive index of about 1.9 to 1.93.
4 . The piping sheet of claim 1 , wherein the plurality of glass beads in the retroreflective layer are vacuum-deposited with a metal comprising one of Al, Ag, Cu, Zn and Sn.
5 . A retroreflective piping sheet for vehicle interior decoration, the piping sheet comprising:
a fabric layer having a fabric circular-knitted from a ply yarn of polyester and spandex;
a retroreflective layer, disposed on one side of the fabric layer, having a plurality of glass beads therein; and
a hot melt adhesive laver disposed on the other side, opposite to the one side, of the fabric layer,
wherein the fabric layer comprises about 70% to 90% polyester yarn and about 10% to 30% spandex yarn and has a thickness of about 0.3 to 0.5 mm.
6 . The piping sheet of claim 2 , wherein the retroreflective fabric has a thickness of about 0.3 to 0.7 mm and a tear strength of about 2 kgf or more, and an elongation at break of about 150% to 500%.
7 . The piping sheet of claim 2 , wherein the hot melt adhesive layer comprises a polyester or polyurethane-based adhesive.