Glass fiber reinforced plastic high-strength composite reinforcing rib and production process thereof

Glass fiber reinforced plastic high-strength composite reinforcing rib and production process thereof

  • CN 105,538,739 B
  • Filed: 12/08/2015
  • Issued: 04/03/2020
  • Est. Priority Date: 12/08/2015
  • Status: Active Grant
First Claim
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1. The glass fiber reinforced plastic composite well lid is characterized by being formed by mixing and hot-pressing an SMC glass fiber reinforced plastic material, quartz sand, gravel, carborundum and a layer of glass fiber reinforced plastic high-strength composite reinforcing rib, wherein the SMC glass fiber reinforced plastic material accounts for 35 parts by weight, the quartz sand, the gravel and the carborundum account for 1.5 parts by weight, and the weight ratio of the quartz sand to the gravel to the carborundum is 1:

  • 1;

    0.5;

    the glass fiber reinforced plastic high-strength composite reinforcing rib comprises glass fibers, and the glass fibers are wound into a mutually staggered structure;

    the glass fiber is uniformly soaked by resin adhesive, and the resin adhesive is formed by mixing 0.1-0.5 part by weight of unsaturated polyester resin, 0.005-0.02 part by weight of curing agent and 0.005-0.02 part by weight of promoter;

    the unsaturated polyester resin is 8309 heat-resistant unsaturated resin;

    the curing agent is cyclohexanone peroxide;

    the accelerant is cobalt naphthenate;

    the glass fiber is twisted into a rope-shaped structure by a plurality of strands of untwisted glass fibers;

    the untwisted glass fiber is E-grade alkali-free untwisted glass fiber;

    the glass fiber is wound into a plurality of staggered pentagram structures at the same center, and each vertex of each pentagram structure is positioned on the same circumference;

    the preparation process of the SMC glass fiber reinforced plastic material comprises the following steps;

    100 parts by weight of adhesive, 39 parts of low shrinkage agent, 230 parts of filler, 4 parts of release agent, 1.4 parts of initiator, 2 parts of thickener, 2 parts of antioxidant, 2 parts of ultraviolet absorbent and 25 parts of alkali-free glass fiber are mixed, pressed and cured to form a sheet structure;

    the parts are all parts by weight;

    the adhesive is selected from heat-resistant unsaturated polyester resin;

    the low shrinkage agent is prepared from styrene and polystyrene according to the weight ratio of 2;

    1;

    the filler is 300-mesh heavy calcium carbonate powder;

    the release agent is zinc stearate;

    the initiator is tert-butyl peroxybenzoate;

    the thickener is activated magnesium oxide;

    the production process of the glass fiber reinforced plastic high-strength composite reinforcing rib comprises the following steps;

    (1) preparing a resin adhesive;

    pouring cyclohexanone peroxide into unsaturated polyester resin, stirring uniformly, adding an accelerant, stirring uniformly, and pouring into a hopper;

    (2) selecting the starting ends of a plurality of bundles of continuous glass fibers, twisting the starting ends into a strand of rope, and penetrating the strand of rope into a hopper filled with resin adhesive to ensure that the glass fibers are uniformly soaked;

    (3) scraping the redundant resin adhesive on the glass fiber by a scraper;

    (4) winding the open end of the glass fiber on one side of the mold, and then rotating the mold to wind the glass fiber once in a pentagram shape;

    then the mould is rotated to form a certain included angle, and the winding is carried out once in a regular pentagram shape;

    by analogy, winding of a plurality of pentagons is completed to form a mutual staggered structure;

    the mould is circular, the center of the mould is provided with a shaft hole, more than 10 winding columns are uniformly fixed on the periphery of the mould, and the winding columns are all positioned on the same circumference;

    (5) the wound glass fiber can be solidified and stripped after being dried.

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