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A kind of polycarbonate extrusion foam composite sheet and preparation method thereof

A polycarbonate and composite board technology, applied in the field of materials, can solve the problems of extrusion foaming, poor processing fluidity, and low melt strength, etc., and achieve the effects of weight reduction, low closed cell rate, and smooth surface

Active Publication Date: 2016-01-06
SHANGHAI GENIUS ADVANCED MATERIAL (GRP) CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, as an amorphous material, PC has a high processing temperature, poor processing fluidity, high melt viscosity, and is prone to stress cracking. After melting, the melt strength is very low, and it is difficult to meet the needs of extrusion foaming.

Method used

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  • A kind of polycarbonate extrusion foam composite sheet and preparation method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0056] (1) Extrusion grade PC with a melt index of 6g / 10min. The PC resin is pre-dried in a vacuum oven at 140°C for 4 hours; 30% of the alkali-free short glass fiber is dried in an oven for 0.5 hours at a temperature of 110°C;

[0057] (2) Preparation of modified PC pellets: take 51% of dried PC, 30% of alkali-free short glass fiber, 0.4% of chain extender dioxazoline, and toughening agent styrene-ethylene-butene triblock copolymer SEBS 10%, flame retardant triphenyl phosphate TPP 6%, the second antioxidant is antioxidant 1076 with 0.3%, the second antioxidant 168 is 0.3%, the second lubricant is calcium stearate 0.5%, the second Lubricant silicone powder 0.5% is put into the high-mixer and mixed evenly, then put into the twin-screw granulator, the extrusion temperature is 260~275℃, the screw speed is 50r / min;

[0058] (3) Remixing of pellets:

[0059] (3a) Mixing of core layer particles: Dry the PC modified material prepared in step (2) at 110°C for 4 hours; extrusion-grade PETG w...

Embodiment 2

[0069] (1) Extrusion grade PC with a melt index of 10g / 10min. The PC resin is pre-dried in a vacuum oven at 140°C for 4 hours.

[0070] (2) Take 93% of dry PC, 1% of chain extender dioxazoline, 3% of toughening agent MBS, 0.2% of second antioxidant 1076, 0.2% of second antioxidant 168, second lubricant EBS 0.2%, put it into the high-mixer and mix it evenly, put it into the twin-screw granulator, the extrusion temperature is 260~275℃, and the screw speed is 150r / min.

[0071] (3) Preparation of modified PC pellets:

[0072] (3a) Mixing of core layer particles: Dry the PC modified material prepared in step (2) at 110°C for 4 hours; extrusion-grade PETG with a melt index of 1.1g / 10min and dry it in a vacuum oven at a drying temperature of 65 ℃, dry for 5-6 hours, confirm that the humidity is lower than 0.04%;

[0073] Put the dried polycarbonate modified pellets and 0.5% of the wetting agent white oil into the mixer and mix well, add THT1% and zinc stearate 0.9%, continue to mix evenly,...

Embodiment 3

[0082] (1) Extrusion grade PC with a melt index of 9g / 10min. The PC resin is pre-dried in a vacuum oven at 140°C for 4 hours, and 10% of low-alkali short glass fibers are dried in a dryer for half an hour at a temperature of 110 ℃.

[0083] (2) Take 69% of dry PC, 0.7% of chain extender dioxazoline, 10% of low-alkali short glass fiber, 3% of toughener SEBS, 15% of flame retardant DBDPO, and 0.3% of second antioxidant 1076. Take 0.3% of the second antioxidant 168, 0.2% of the second lubricant silicone powder, and 0.6% of the second lubricant calcium stearate, put them in a high-mixer and mix them evenly and put them in a twin-screw granulator. The twin screw processing temperature is 260~275℃, and the screw speed is 100r / min;

[0084] (3) Mixing of core layer particles:

[0085] (3a) Mixing of core layer particles: Dry the PC modified material prepared in step (2) at 100°C for 4 hours; extrusion grade PETG, melt index 1.1g / 10min, dry in a vacuum oven at a drying temperature of Dry ...

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Abstract

The invention belongs to the technical field of materials, and relates to a polycarbonate extrusion foaming composite sheet material and a preparation method thereof. The sheet material is composed of a surface layer and a core layer, wherein the surface layer occupies 5%-20% of a whole thickness of the sheet material; the core layer occupies 80%-95% of the whole thickness of the sheet material; the surface layer is manufactured by the following components of, by weight, 99%-99.5% of poly(ethylene terephthalate)-1,4-dimethyl cyclohexane, 0.1-0.5% of a first lubricant and 0.1%-0.5% of a first antioxidant; and the core layer is manufactured by the following components of, by weight, 50%-95% of polycarbonate, 0-30% of a glass fiber, 0.1%-1% of foaming powder, 0.1%-1% of a foaming regulator, 0.1%-1% of a flame retardant, 3%-10% of a toughening agent, 0.1%-0.5% of a wetting agent, 0.2%-1% of a second lubricant and 0.5%-1% of a second antioxidant.

Description

Technical field [0001] The invention belongs to the technical field of materials, and relates to a polycarbonate extrusion foamed composite board and a preparation method thereof. Background technique [0002] In tunnels, buildings, bridges and other engineering constructions, a large number of building templates are required. Currently, steel templates, wood templates, bamboo templates, and plastic foam templates are mainly used. Like the use of more wooden templates, the quality is poor, resources are wasted, and recycling is difficult. However, foam templates such as polypropylene / polyethylene have disadvantages such as low heat-resistant temperature, easy to be brittle and deformed, and poor mold release. The present invention uses polycarbonate (PC) as the main substrate and polyethylene terephthalate-1,4-cyclohexane dimethyl (PETG) as the auxiliary substrate. After extrusion, melting, foaming, cooling and shaping Applied to building templates, the performance improves th...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): B32B27/08B32B27/18C08L67/02C08L69/00C08K13/04C08K7/14C08K5/523C08K5/06C08K5/109C08K5/353C08K3/22C08J9/10B29C47/92B29C48/92
CPCB29C48/92B29C2948/9259B29C2948/92704B29C2948/92885B29C2948/92895
Inventor 郭建军
Owner SHANGHAI GENIUS ADVANCED MATERIAL (GRP) CO LTD