Extrusion die, methods of coating a wire core, and a coated wire by the extrusion die and methods
OwnerOlivier Guise, Xin Kong +3inventors
InventorsOlivier Guise, Xin Kong, Xiucuo Li, James J. Xu, Weiguang Yao
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Abstract
This disclosure relates to a coated wire, an extrusion die, a process of coating a wire and a method of testing wrinkles on covering of a coated wire. A coated wire comprises a wire core; and a covering comprising a thermoplastic composition which comprises by weight of total composition, (i) 10% to 50% of a poly(arylene ether); (ii) 5% to 25% of a polyolefin; and (iii) 15% to 45% of an impact modifier. The wrinkles presented on the covering of a coated wire manufactured by an extrusion die are substantively reduced.
Claims47
An extrusion die comprising an inner die (440) and an outer die (410),
- wherein the inner die (440) comprises a wire core passing space (442) and a projection end (446) having a length (C);
- wherein the outer die (410) comprises an inner space (412) and an exit passage (416);
- wherein the projection end (446) of the inner die (440) is positioned at least partially within the inner space (412) and exit passage (416) of the outer die (410) to form a wire coating passage (432) and a molding passage (436).
A method of coating a wire core comprising the steps of:
- a) melting a thermoplastic composition to form a melt thermoplastic composition which comprises by weight of the total composition:
- (i) 10% to 50% of a poly(arylene ether);
- (ii) 5% to 25% of a polyolefin;
- and (iii) 15% to 45% of an impact modifier;
- (b) optionally filtering the melt thermoplastic composition to form a filtered composition;
- (c) coating the filtered composition onto a wire core;
- and
- (d) molding the coated wire for a length (A).
A method of testing wrinkle on surface of coated wire comprising steps of:
- (i) setting a bending length from point 1 to point 2 on a coated wire;
- (ii) bending the wire to bring the point 1 and point 2 being contact;
- (iii) determining a bending angle α between [AB] and [AC] wherein point A is located at the top of the bent samples while the distance between points B and C defines the maximum width of the bent samples;
- and
- (iv) measuring wrinkles in depth from lowest point of surface of the coated wire to the top of the surface of the coated wire at the bending angle;
- wherein a ratio of the bending length to outer diameter of a coated wire at a range of from 5 to 20;
- and
- wherein the bending angle is of from 50 to 120 degree.
Dependencies are inferred from the claim text.