Blow molded article with visual effects
A blow molded article obtained by blow molding of a preform made via parallel flow coinjection, having a wall formed by 3 layers in at least a region wherein the outside layer is transparent and the inner layer comprises an effect pigment visible through the transparent layer. Articles according to the invention have an improved gloss, low haze and higher resistance to delamination than previous articles. The invention relates also to preforms for making articles as described and to methods for making preforms and articles.
1. A blow molded article comprising a hollow body defined by a wall wherein the wall has an inner surface and an outer surface, the wall being formed in at least one region by 3 layers, a layer A including the outer surface of the wall in that region, a layer B including the inner surface of the wall in that region and a layer C sandwiched between layers A and B, said article being obtained by blow molding of a preform made via parallel flow coinjection of about 2 or more streams; wherein one or more streams make up layers A and B and the remaining streams make up layer C, wherein the layer C comprises a pigment visible through layer A; wherein between layers A and C and layers B and C there is a transition layer where the layers are interpenetrated; wherein the transition layer between layers A and C and/or layers B and C comprises a thickness of from about 500 nm to about 125 μm.
2. The article according to claim 1 , wherein layer A comprises a thickness and layer B comprises a thickness and the thickness of layer A is greater than the thickness of layer B.
3. The article according to claim 1 , wherein the article further comprises a front side that is non-planar.
4. The article according to claim 1 , wherein layer C comprises an effect pigment comprising a pearlescent pigment.
5. The article according to claim 4 , wherein the effect pigment is about 0.01 wt. % to about 5 wt. % of layer C.
6. The article according to claim 4 , wherein the effect pigment comprises platelet shaped pigments with a face wherein the pigments are primarily oriented so that the face is parallel to the outer surface of the article.
7. The article according to claim 1 , wherein the article comprises a location on the outer surface with a haze of less than 20.
8. The article according to claim 1 , wherein the article comprises a location on the outer surface with a haze anisotropy of less than or equal to 0.9.
9. The article according to claim 1 , wherein the article comprises a location on the outer surface with a gloss 20° of greater than or equal to 60 GUs.
10. The article according to claim 1 where the article comprises a location on the outer surface with a ΔC* of at least 15.
11. The article according to claim 1 where the article comprises a location on the outer surface with a C* (45 as −15) that is greater than 35.
12. The article according to claim 1 wherein layer A is transparent and layer C is not transparent.
13. The article according to claim 1 where the thickness of the transition layer between layers A and C and/or layers B and C is from about 1 μm to about 100 μm.
14. The article according to claim 1 , wherein said region formed by three layers comprises more than 90% of the article weight.