Method of covering a plastic surface with a permanent coating
The invention particularly relates to a method of applying a permanent coating to a plastic surface of a first part, comprising the following steps: applying to said plastic surface a layer of a polyamide-based hot-melt material, maintaining this layer of hot-melt material on said plastic surface for a period of time ranging from a few minutes to several hours, removing this layer of hot-melt material from this plastic surface; and applying a permanent coating to said surface, said permanent coating being based on polyurethane, an epoxy resin or polyesters, a polycarbonate and/or an acrylic resin; as well as the use of such a method in the automotive industry.
1. A method of applying a permanent coating to a plastic surface of a first part, the method comprising:
applying to the plastic surface a layer of a polyamide-based hot-melt material comprising C12 polyamide,
maintaining this layer of hot-melt plastic material on the plastic surface for a period of time ranging from a few minutes to several hours,
removing this layer of hot-melt material from this plastic surface; and
applying a permanent coating on the surface, the permanent coating being based on at least one from the following:
polyurethane;
an epoxy resin or polyesters;
a polycarbonate; or
an acrylic resin.
2. The method of claim 1 , wherein no flame treatment step on the plastic surface is carried out.
3. The method of claim 1 , wherein the maintaining step comprises a heating step.
4. The method according to claim 1 , wherein the hot-melt material is based on, consists, or consists essentially of a C12 polyamide.
5. The method according to claim 4 , wherein the hot-melt material consists of a C12 polyamide.
6. The method according to claim 4 , wherein the hot-melt material consists essentially of a C12 polyamide.
7. The method according to claim 1 , wherein the first is based on a thermoplastic material selected from the group consisting of acrylonitrile butadiene styrene (ABS), polyamides, polycarbonates (PC), high-density polyethylenes (PE-HD), low-density polyethylenes (PE-LD), amorphous or crystalline poly(ethylene terephthalate) (PET), poly(methyl methacrylate) (PMMA), polypropylenes (PP), crystal polystyrenes (PS), rigid polyvinyl chloride (PVC), and mixtures thereof.
8. The method of claim 7 , wherein the thermoplastic material is polypropylene-based.
9. The method according to claim 7 , wherein the polyamide is selected from the group consisting of polycaprolactams: [NH—(CH2)5-CO]n (PA-6) and polyhexamethylene adipamides: [NH—(CH2)6-NH—CO—(CH2)4-CO]n (PA-6,6,).
10. The method of claim 1 , wherein the plastic comprises one of an antioxidant compound and an anti-UV compound.
11. The method of claim 1 , wherein the permanent coating is a glue.
12. The method of claim 1 , wherein the first part is a motor vehicle part.
13. The method according to claim 1 , wherein the hot-melt material consists essentially of C12 polyamide.
14. The method according to claim 1 , wherein the permanent coating is based on polyurethane.
15. The method according to claim 1 , wherein the permanent coating is based on an epoxy resin or polyesters.
16. The method according to claim 1 , wherein the permanent coating is based on a polycarbonate.
17. The method according to claim 1 , wherein the permanent coating is based on an acrylic resin.
18. The method according to claim 1 , wherein the permanent coating is based on polyurethane and an epoxy resin or polyesters.
19. The method according to claim 1 , wherein the permanent coating is based on a polycarbonate and an acrylic resin.
20. The method according to claim 1 , wherein the permanent coating is based on an epoxy resin or polyesters and a polycarbonate.