Polymeric materials
AssigneeColormatrix Holdings, Inc.
InventorsAndrew Overend, Patrick Brown, Neil Davies
Life of this patent
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Abstract
A method of producing a product, for example a stretch blow moulded container having a metallic or pearlescent appearance, comprises selecting a mass, for example a container preform, comprising a thermoplastic polymer which incorporates a carrier polymer and stretching the thermoplastic polymer during production of said product, for example from said mass. Said carrier polymer is suitably polydimethylsiloxane and the mass may be made in a process which comprises contacting a thermoplastic polymer with a liquid formulation comprising carrier polymer and colourant.
Claims18
A method of producing a product, the method comprising:
- a step (i)* which comprises contacting a carrier polymer with a thermoplastic polymer;
- a step (i) which follows step (i)* and comprises selecting a mass comprising said thermoplastic polymer which incorporates said carrier polymer, wherein said carrier polymer includes oxygen atoms and silicon atoms in its backbone;
- and
- a step (ii) which comprises stretching the thermoplastic polymer during production of said product from said mass.
A method of producing a product, the method comprising:
- (i) contacting a formulation with a polyester in a melt-processing apparatus to produce a mass comprising said polyester incorporating said formulation, wherein said formulation is dosed into said polyester in a molten state, wherein said formulation is a liquid and comprises a carrier polymer comprising polydimethylsiloxane and a colourant, wherein said formulation includes 0 wt % of laminar or plate-like pigments, includes 0 wt % of metallic colourant and includes 0 wt % of pearlescent colourant, wherein the sum of the wt % of all carrier polymers in said formulation which include a repeat unit of formula
- in which R1 and R2 both represent C1-2 un-substituted alkyl moieties and all colourants is at least 95 wt %, and wherein said formulation comprises 80 to 99 wt % of the polydimethylsiloxane and 1 to 20 wt % in total of one or more colourants;
- (ii) producing said mass to include at least 0.5 wt % of carrier polymer and at least 95 wt % of thermoplastic polymer and 0-2 wt % of colourant(s) and wherein, in said mass, the ratio of the wt % of carrier polymer divided by the wt % of thermoplastic polymers is in the range 0.05 to 0.005;
- and
- (iii) stretching the thermoplastic polymer in at least two directions during production of said product from said mass;
- wherein a precursor of the product comprises a preform for a bottle which is made and isolated prior to step (iii).
Dependencies are inferred from the claim text.