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Sheet molding plastic and application thereof

The technology of sheet molding compound and mold release agent is applied in the field of sheet molding compound, which can solve the problems of lack of electrical conductivity, antistatic, and unusable, and achieve the effects of good dimensional accuracy, improved compactness, and improved mechanical strength.

Inactive Publication Date: 2010-04-21
何越江
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Because it only has the functions of flame retardancy and insulation, but has no conductive and antistatic effects, it cannot be used in electronic and electrical equipment components that require electromagnetic shielding and coal mine equipment components that require environmental protection, flame retardancy and antistatic requirements.

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0009] The sheet molding compound of the present invention has its components in parts by mass: 20-30 parts of unsaturated polyester resin, 6-10 parts of low-shrinkage additive, 8-15 parts of long glass fibers of 5 mm to 8 mm, and a diameter of 2 μm 6-12 parts of stainless steel fibers with a length of ~10 μm and 3mm-6mm, 10-25 parts of graphite powder, 40-60 parts of 1250-mesh and 500-mesh calcium carbonate mixed at 2:1, 35-55 parts of aluminum hydroxide, organic over 0.2-0.5 part of oxide, 0.3-0.6 part of thickener, the thickener is calcium hydroxide or magnesium oxide. And 2 to 4 parts of release agent, the release agent is calcium stearate or zinc stearate, and the sheet molding compound is made through resin paste preparation, paste operation, fiber cutting settlement and impregnation, resin thickening, etc. Different products are made by compression molding, and the products can be used for antistatic and flame-retardant electronic and electrical equipment parts or coal ...

Embodiment 2

[0011] The sheet molding compound of the present invention has its components in parts by mass: 30-40 parts of unsaturated polyester resin, 9-12 parts of low-shrinkage additive, 10-18 parts of long glass fibers of 6 mm to 10 mm in diameter of 5 μm 8-15 parts of stainless steel fiber with a length of ~10 μm and 5mm-8mm in length, 25-35 parts of graphite powder, 0.5-1 part of organic silicon, 30-40 parts of calcium carbonate of 1250 mesh and 500 mesh mixed in 2:1, aluminum hydroxide 25-35 parts, 0.5-0.8 parts of organic peroxide, 0.5-0.8 parts of thickener, which is calcium hydroxide or magnesium oxide, and 2-3 parts of release agent, which is stearic acid Calcium or zinc stearate, made into sheet molding compound through resin paste preparation, pasting operation, fiber cutting settlement and impregnation, resin thickening, etc., and molded into different products. The products can be used to prevent electromagnetic penetration Parts of electronic and electrical equipment, such...

Embodiment 3

[0013] The sheet molding compound of the present invention has its components in parts by mass, 40-60 parts of unsaturated polyester resin, 10-15 parts of low-shrinkage additive, 12-20 parts of long glass fibers of 8 mm to 12 mm, with a diameter of 10 μm to 12-20 parts of stainless steel fibers with a length of 20 μm and 8 mm to 10 mm, 30 to 40 parts of graphite powder, 1 to 3 parts of organic silicon, 20 to 30 parts of calcium carbonate of 1250 mesh and 500 mesh mixed in 2:1, and 20 parts of aluminum hydroxide ~30 parts, 0.8~1 part of organic peroxide, 0.8~1.2 parts of thickener, the thickener is calcium hydroxide or magnesium oxide, and 1~3 parts of release agent, the release agent is calcium stearate Or zinc stearate, through resin paste preparation, pasting operation, fiber cutting and settlement and impregnation, resin thickening and other processes, it is made into sheet molding compound, and it is molded into different products. The products can be used for electromagnet...

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Abstract

The invention relates to a sheet molding compound, the composites of which are measured in portions by mass: 20-60 portions of unsaturated polyester resin, 6-15 portions of low profile additive, 8-20portions of long glass fiber of 5mm-12mm, 6-20 portions of stainless steel fiber with the diameter of 2 Mumeter-20 Mumeter and the length of 3mm-10mm, 10-40 portions of graphite powder, 0-3 portions oforganic silicone, 20-60 portions of calcium carbonate with 1250 meshes and 500 meshes according to the ratio of 2:1, 20-45 portions of aluminum hydroxide, 0.2-1 portions of organic peroxide, 0.3-1.2p ortions of thickener and 1-4 portions of release agent. The invention has high mechanical strength, good dimension precision, environmental protection, flame resistance and conduction performance, andcan be used in electromagnetic shielding electronic appliance and equipment components or coal mine equipment components with environmental protection and inflame retarding and antistatic functions.

Description

technical field [0001] The invention relates to a sheet molding compound and its application, belonging to the technical field of fiber-reinforced molding compounds. technical background [0002] Sheet molding compound (SMC) is a resin paste mixed with raw materials such as unsaturated polyester resin, thickener, initiator, crosslinking agent, low shrinkage additive, filler, internal mold release agent and colorant, impregnated with chopped fibers Sheet molding material made of roving or fiberglass mat covered on both sides with polyethylene or polypropylene film. As a new type of molding material with rapid development, sheet molding compound has many characteristics: ①, good fluidity, can form various complex parts; ②, molding process does not require high temperature and pressure, wide application range, high production efficiency , can greatly reduce production costs; ③, has superior corrosion resistance; ④, mechanical properties can be comparable to some metal material...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C08J5/00C08L67/06C08K7/14C08K5/09C08K3/22
Inventor 何越江
Owner 何越江