Foamed polypropylene composite board and preparation method thereof

A technology of expanded polypropylene and composite boards, applied in chemical instruments and methods, synthetic resin layered products, layered products, etc., can solve the problems of low thermal deformation load temperature, inability to sound insulation and noise reduction, poor mechanical properties, etc. Achieve high thermal deformation load temperature, good sound insulation effect, and large flexural modulus

Inactive Publication Date: 2012-06-20
CHONGQING JUWENG PLASTIC MFG
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] At present, the PP materials used for automotive interior decoration parts are mainly modified PP sheets. They all have low thermal deformation load temperature (only 85-90 degrees), poor mechanical properties, high shrinkage, heavy quality, and cannot be sound-proof and noise-reducing. Defects such as shock absorption, such PP sheets are used to make automotive interior decorations, and the roof has defects such as easy deformation, collapse, and short service life. The existing modified PP sheets are not the best sheet for making automotive interior decorations.

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0026] 1. Prepare raw materials, 50 parts of LDPE modified polypropylene, 50 parts of copolymerized polypropylene, 5 parts of glass fiber, 3 parts of ethylene-vinyl acetate copolymer, 2 parts of foaming agent OT, 1.5 parts of sodium bicarbonate, and 0.3 parts of crosslinking agent parts, 0.4 parts of flame retardant and 0.3 parts of mineral oil,

[0027] 2. Add LDPE modified polypropylene, copolymerized polypropylene, glass fiber, and ethylene-vinyl acetate copolymer into the mixer, stir for 5 minutes to mix evenly, and the stirring speed is 100-150 rpm, and then add mineral oil to it, Stir until evenly mixed, the stirring speed is 100-150 rpm, then add foaming agent OT, sodium bicarbonate, cross-linking agent and flame retardant to it, stir for 15 minutes until uniformly mixed; the stirring speed is 100-150 rpm min,

[0028] 3. The above-mentioned mixed materials are sent to the hopper of the extruder, and the materials are melted, kneaded, extruded and foamed in the screw b...

Embodiment 2

[0041] 1. Prepare raw materials, 55 parts of POE modified polypropylene, 40 parts of copolymerized polypropylene, 7 parts of glass fiber, 4 parts of ethylene-vinyl acetate copolymer, 3 parts of foaming agent OT, 0.5 parts of sodium bicarbonate, and 0.5 parts of crosslinking agent parts, 0.3 parts of flame retardant and 0.3 parts of mineral oil,

[0042] 2. Add POE modified polypropylene, copolymerized polypropylene, glass fiber, and ethylene-vinyl acetate copolymer into the mixer, stir for 5 minutes to mix evenly, and the stirring speed is 100-150 rpm, and then add mineral oil to it. Stir until evenly mixed, the stirring speed is 100-150 rpm, then add foaming agent OT, sodium bicarbonate, cross-linking agent and flame retardant to it, stir for 15 minutes until uniformly mixed; the stirring speed is 100-150 rpm min,

[0043] 3. The above-mentioned mixed materials are sent to the hopper of the extruder, and the materials are melted, kneaded, extruded and foamed in the screw barre...

Embodiment 3

[0056] 1. Prepare raw materials, 60 parts of HDPE modified polypropylene, 50 parts of copolymerized polypropylene, 10 parts of glass fiber, 5 parts of ethylene-vinyl acetate copolymer, 3 parts of foaming agent AC (azodicarbonamide), citric acid 1.5 parts of sodium, 0.8 parts of crosslinking agent, 0.4 parts of flame retardant and 0.4 parts of mineral oil,

[0057] 2. Add HDPE modified polypropylene, copolymerized polypropylene, glass fiber, and ethylene-vinyl acetate copolymer into the mixer, stir for 5 minutes to mix evenly, and the stirring speed is 100-150 rpm, and then add mineral oil to it. Stir until evenly mixed, the stirring speed is 100-150 rpm, then add foaming agent AC, sodium citrate, cross-linking agent and flame retardant to it, stir for 15 minutes until uniformly mixed; the stirring speed is 100-150 rpm min,

[0058] 3. The above-mentioned mixed materials are sent to the hopper of the extruder, and the materials are melted, kneaded, extruded and foamed in the s...

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Abstract

The invention discloses a foamed polypropylene composite board, which comprises a foamed polypropylene board and non-woven fabric or polyvinyl chloride of which single face or both faces are compounded onto the foamed polypropylene board, wherein the foamed polypropylene board comprises the following raw materials in parts by weight: 40-60 parts of modified polypropylene, 30-50 parts of co-polypropylene, 5-20 parts of glass fiber, 0-6 parts of ethylene-vinyl acetate copolymer, 0-10 parts of polyethylene, 1-4 parts of foaming agent azodicarbonamide (AC)or OT (o-Toluidine), 0.5-2 parts of foaming initiator, 0.3-1 part of cross-linking agent, 0.2-0.4 part of fire retardant and 0.2-0.5 part of mineral oil. The invention also provides a preparation method for the foamed polypropylene composite board. The foamed polypropylene composite board disclosed by the invention has the performances of light weight, high thermal deformation load temperature, hardness in deformation, high bending modulus, high tensile strength, high notch impact strength, low contractibility rate, good rebound resilience, good toughness, noise reduction, good sound insulation effect, easiness in processing, no water is not water absorbability and recyclability.

Description

technical field [0001] The invention relates to a foamed polypropylene composite sheet used for making interior decoration parts of vehicles such as automobiles, industrial sound insulation and noise reduction, and packaging. At the same time, the invention also provides a preparation method for the composite sheet, which belongs to polymer materials field. Background technique [0002] Comfort, safety, lightweight, recycling of waste materials, and environmental protection are the main trends in the development of today's automotive technology, which requires automotive interior materials to be lightweight, heat-insulated, impact-resistant, sound-insulated, environmentally friendly, flame-retardant, and thermally deformable High load temperature, recyclable, resource saving. [0003] At present, the materials used for automotive interior parts mainly include ABS boards, PU boards, GMT boards, hemp fiber boards, PS foam boards, modified PP boards, etc. They all have certain...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C08L23/26C08L23/14C08L23/06C08L23/08C08L31/04C08K13/04C08K7/14C08K3/26C08K5/098C08J9/10B32B27/06B32B27/18B32B27/32
Inventor 母永清
Owner CHONGQING JUWENG PLASTIC MFG
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