Durable polyoxymethylene composition
OwnerJung-Pao Chang, Chi-En Lininventors
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Abstract
A durable polyoxymethylene composition and a ramp made of the durable polyoxymethylene composition are disclosed. The durable polyoxymethylene composition of the present invention has excellent micro-wear-resistant property.
Claims28
A polyoxymethylene composition, which has at least one of the micro-wear loss of less than 1 μm maximum wear depth or less than 10 μm2 wear area under a condition of a load of 2.5 g after being reciprocated 600,000 times at a speed of 8 inch/second and an environmental humidity of 13% to 17% RH and an environmental temperature of 3° C. to 10° C., the polyoxymethylene composition comprising:
- a polyoxymethylene copolymer of 90.5 wt % to 92.5 wt % including 3.3 wt % of 1,3-dioxolane as a comonomer;
- an inorganic filler of 0.5 wt % to 3.0 wt %;
- a lubricant of 3.0 wt % to 10.0 wt %;
- a nucleating agent of 1.0 wt % to 3.0 wt %;
- a stabilizer of 0.5 wt % to 1.0 wt %;
- and
- an anti-static agent of 0.5 wt % to 2.0 wt %.
A ramp which has at least one of the micro-wear loss of less than 1 μm maximum wear depth and of less than 10 μm2 wear area under a condition of a load of 2.5 g after being reciprocated 600,000 times at a speed of 8 inch/sec and an environmental humidity of 13% to 17% RH) and an environmental temperature of 3° C. to 10° C., the ramp comprising:
- a polyoxymethylene copolymer of 90.5 wt % to 92.5 wt % including 3.3 wt % of 1,3-dioxolane as a comonomer;
- an inorganic filler of 1.0 wt % to 3.0 wt %;
- a lubricant of 3.0 wt % to 10.0 wt %;
- a nucleating agent of 1.0 wt % to 3.0 wt %;
- a stabilizer of 0.5 wt % to 1.0 wt %;
- and
- an anti-static agent of 0.5 wt % to 2.0 wt %.
A micro-wear-resistant polyoxymethylene composition which has at least one of the micro-wear loss of less than 0.5 μm maximum wear depth and of less than 5 μm2 wear area under a condition of a load of 2.5 g after being reciprocated 600,000 times at a speed of 8 inch/sec and an environmental humidity of 50% to 60% RH and an environmental temperature of 22° C. to 60° C., the micro-wear-resistant polyoxymethylene composition comprising:
- a polyoxymethylene copolymer of 90.5 wt % to 92.5 wt % including 3.3 wt % of 1,3-dioxolane as a comonomer;
- an inorganic filler of 0.5 wt % to 3.0 wt %;
- a lubricant of 3.0 wt % to 10.0 wt %;
- a nucleating agent of 1.0 wt % to 3.0 wt %;
- a stabilizer of 0.5 wt % to 1.0 wt %;
- and
- an anti-static agent of 0.5 wt % to 2.0 wt %.
A ramp which has at least one of the micro-wear loss of less than 0.5 μm maximum wear depth and of less than 5 μm2 wear area under a condition of a load of 2.5 g after being reciprocated 600,000 times at a speed of 8 inch/sec and an environmental humidity of 50%-60% RH and an environmental temperature of 22° C. to 60° C., the ramp comprising:
- a polyoxymethylene copolymer of 90.5 wt % to 92.5 wt % including 3.3 wt % of 1,3-dioxolane as a comonomer;
- an inorganic filler of 0.5 wt % to 3.0 wt %;
- a lubricant of 3.0 wt % to 10.0 wt %;
- a nucleating agent of 1.0 wt % to 3.0 wt %;
- a stabilizer of 0.5 wt % to 1.0 wt %;
- and
- an anti-static agent of 0.5 wt % to 2.0 wt %.
Dependencies are inferred from the claim text.