Storage stable polyolefin compatible size for fiber glass strands
AssigneePPG Industries, Inc.
InventorChester Temple
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Abstract
Continuous glass fiber forming packages with a sizing composed of a coupling agent, a stabilizer, a lubricant, a non-crosslinking film-forming polymer and a self-reactive crosslinking film-forming polymer are disclosed for utilization in polyolefin polymer reinforcement. The article formed and formation method for fiber combination with a polyolefin polymer are also disclosed.
Claims28
An article comprising a laminate of polyolefin and needled, continuous, glass fiber strand mat where the continuous glass fiber strands in the mat have integrity from the needling and the mat is impregnated throughout with the polyolefin polymer wherein said continuous glass fiber strands have present a dried residue of an aqueous non-peroxide-containing size composition applied during the formation of the continuous strands, where the aqueous size, comprises:
- an amino coupling agent, stabilizer, maleonated or acrylic modified amorphous polypropylene lubricant, non-crosslinkable film-forming polymer, and a self-reactive crosslinking film-forming polymer.
A method of forming a composite article of polyolefin reinforced with needled, continuous glass fiber strand mat, wherein integrity is provided to the continuous glass fiber strands within the mat by needling and wherein the mat is impregnated through with the polyolefin polymer, comprising:
- a. applying to the glass fibers after the formation of the fibers from orifices in a bushing in a glass melting furnace a non-peroxide-containing sizing having a stabilizer, amino coupling agent, maleonated or acrylic modified amorphous polypropylene lubricant, noncrosslinkable polymer and self-reactive crosslinking polymer and aqueous carrier,
- b. collecting the sized glass fiber into bundles of fibers,
- c. laying down a plurality of the continuous glass fiber strands to form a mat,
- d. needling the mat,
- e. bring together the needled mat of sized continuous glass fiber strands and polyolefin polymer,
- f. applying pressure to form a reinforced polyolefin article,
- g. heating the reinforced polyolefin articles under pressure to bind the sized glass fibers in the needled continuous strand mat to the polyolefin,
- h. decreasing the temperature and pressure to produce composites of polyolefin and needled continuous glass fiber strand mat suitable for molding or stamping.
Dependencies are inferred from the claim text.