Durable polyoxymethylene composition
AssigneeMin Aik Technology Co., Ltd.
InventorsJung-Pao Chang, Chi-En Lin
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Abstract
A durable polyoxymethylene composition includes a polyoxymethylene copolymer with 1,3-dioxolane as a comonomer, a lubricant, an inorganic filler, a nucleating agent including a sodium salt, a stabilizer, an anti-static agent. A ramp is made of the durable polyoxymethylene. The ramp and the durable polyoxymethylene have excellent micro-wear-resistant property.
Claims26
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 80 wt % to 95 wt % including 1.0 wt % to 3.3 wt % of 1,3-dioxolane as a comonomer;
- a composite lubricant of 1.0 wt % to 10.0 wt %, which comprises a solid lubricant and a liquid lubricant;
- a compatilizer of 1.0 wt % to 10.0 wt %;
- a nano-scale inorganic filler of 0.1 wt % to 3.0 wt %;
- a nucleating agent of 0.1 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 5.0 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 80 wt % to 95 wt % including 1.0 wt % to 3.3 wt % of 1,3-dioxolane as a comonomer;
- a composite lubricant of 1.0 wt % to 10.0 wt %, which comprises a solid lubricant and a liquid lubricant;
- a compatilizer of 1.0 wt % to 10.0 wt %;
- a nano-scale inorganic filler of 0.1 wt % to 3.0 wt %;
- a nucleating agent of 0.1 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 5.0 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 80 wt % to 95 wt % including 1.0 wt % to 3.3 wt % of 1,3-dioxolane as a comonomer;
- a composite lubricant of 1.0 wt % to 10.0 wt %, which comprises a solid lubricant and a liquid lubricant;
- a compatilizer of 1.0 wt % to 10.0 wt %;
- a nano-scale inorganic filler of 0.1 wt % to 3.0 wt %;
- a nucleating agent of 0.1 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 5.0 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 80 wt % to 95 wt % including 1.0 wt % to 3.3 wt % of 1,3-dioxolane as a comonomer;
- a composite lubricant of 1.0 wt % to 10.0 wt %, which comprises a solid lubricant and a liquid lubricant;
- a compatilizer of 1.0 wt % to 10.0 wt %;
- a nano-scale inorganic filler of 0.1 wt % to 3.0 wt %;
- a nucleating agent of 0.1 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 5.0 wt %.
Dependencies are inferred from the claim text.