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Preparation method of halogen-free flame-retardant low-smoke coated co-extruded wood-plastic profile

A technology for wood-plastic profiles and cigarette packs, applied in the field of wood-plastic materials, can solve problems such as flame retardant properties that cannot meet actual needs and personnel hazards.

Inactive Publication Date: 2020-10-23
ANHUI GUOFENG WOOD PLASTIC COMPOSITE
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, according to the fire scene in recent years, the flame retardant performance of most of the current flame retardant wood-plastic composite materials still cannot meet the actual needs, and it is easy to emit a large amount of black smoke and toxic gases when burning, which will cause harm to personnel. Therefore, further improvement is still required

Method used

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  • Preparation method of halogen-free flame-retardant low-smoke coated co-extruded wood-plastic profile

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Effect test

Embodiment 1

[0029] A method for preparing a halogen-free flame-retardant low-smoke coated co-extruded wood-plastic profile in this embodiment. process, the coating layer is coated on the core layer; the specific preparation method of the halogen-free flame-retardant low-smoke coated co-extruded wood-plastic profile is as follows:

[0030] (1) Configuration of core material:

[0031] 40 parts of high-density polyethylene, 30 parts of wood flour, 1 part of titanate coupling agent, 2 parts of stearic acid and metal salts thereof, 1 part of dibutyl phthalate, 8 parts of expanded graphite and 25 parts of composite halogen-free flame retardant and smoke suppressant were mixed in a high-speed mixer, the mixing temperature was 100°C, and the mixing time was 25 minutes; then, the mixed raw materials were added to an extrusion granulator for granulation, extruded The temperature of the main machine of the granulator is set at 160°C, the speed is 60r / min, the speed of the feeder is 6r / min, the melt...

Embodiment 2

[0038]A method for preparing a halogen-free flame-retardant low-smoke coated co-extruded wood-plastic profile in this embodiment. process, the coating layer is coated on the core layer; the specific preparation method of the halogen-free flame-retardant low-smoke coated co-extruded wood-plastic profile is as follows:

[0039] (1) Configuration of core material:

[0040] 60 parts of high-density polyethylene, 50 parts of wood flour, 3 parts of titanate coupling agent, 5 parts of paraffin, 3 parts of dioctyl phthalate, 10 parts of expanded graphite and Add 35 parts of compound halogen-free flame retardant and smoke suppressant to the high mixer for mixing, the mixing temperature is 110°C, and the mixing time is 30 minutes; then, the mixed raw materials are added to the extrusion granulator for granulation, and the temperature of the main machine of the extrusion granulator Set at 170°C, speed 80r / min, feeder speed 8r / min, extruder melt pressure 5MPa, head temperature 180°C, ext...

Embodiment 3

[0047] A method for preparing a halogen-free flame-retardant low-smoke coated co-extruded wood-plastic profile in this embodiment. process, the coating layer is coated on the core layer; the specific preparation method of the halogen-free flame-retardant low-smoke coated co-extruded wood-plastic profile is as follows:

[0048] (1) Configuration of core material:

[0049] 50 parts of high-density polyethylene, 40 parts of wood powder, 2 parts of titanate coupling agent, 3.5 parts of polyethylene wax, 2 parts of dibutyl phthalate, 9 parts of expansion Graphite and 30 parts of composite halogen-free flame retardant and smoke suppressant are mixed in a high-speed mixer, the mixing temperature is 105°C, and the mixing time is 28 minutes; then, the mixed raw materials are added to an extrusion granulator for granulation, and the extrusion granulator The temperature of the main machine is set at 165°C, the speed is 70r / min, the speed of the feeder is 7r / min, the melt pressure of the...

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Abstract

The invention provides a preparation method of a halogen-free flame-retardant low-smoke coated co-extruded wood-plastic profile, which comprises the following steps of: (1) mixing high-density polyethylene, wood flour, a coupling agent, a lubricant, a plasticizer, expanded graphite and a composite halogen-free flame-retardant smoke suppressant, and granulating the mixture to obtain core layer material particles; (2) mixing sodium-zinc ionized resin, high-density polyethylene, expanded graphite, the composite halogen-free flame-retardant smoke suppressant and a coloring agent, and then granulating the mixture to obtain coating layer material particles; and (3) adding the core layer material particles into a charging barrel of a conical double-screw main extruder, adding the coating layer material particles into a charging barrel of a single-screw auxiliary extruder, simultaneously starting up the extruders for extrusion molding, and carrying out shaping and cooling after extrusion. Thecomposite halogen-free flame-retardant smoke suppressant is prepared from ammonium polyphosphate APP, a triazine charring agent CFA and silicon dioxide. The wood-plastic profile prepared by the preparation method provided by the invention has good flame-retardant and smoke-suppressing effects, does not release toxic and harmful substances at high temperature, and avoids secondary harm to human bodies.

Description

technical field [0001] The invention relates to the technical field of wood-plastic materials, in particular to a method for preparing a halogen-free flame-retardant low-smoke coated co-extruded wood-plastic profile. Background technique [0002] Wood-plastic composite material is a kind of fibrous material made of lignocellulosic materials (such as wood, bamboo, crop straw and processing residues, etc., whose main chemical components are cellulose, hemicellulose and lignin) and plastics (such as polyester New materials composed of thermoplastic polymers such as ethylene, polypropylene, polystyrene, polyvinyl chloride) have been widely used in many fields. However, since both wood fiber materials and plastics are extremely flammable, in practical applications, it is often required that the corresponding wood-plastic composite materials also have certain flame-retardant properties. [0003] At present, the flame-retardant wood-plastic composite materials on the market all ha...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B32B27/32B32B27/06B32B27/20B32B27/22B32B33/00C08L23/06C08L97/02C08K13/04C08K7/24C08K3/32C08K5/3492C08K3/36C08L23/08B29B7/28B29B9/06B29C48/92
CPCB29B7/28B29B9/06B32B27/06B32B27/20B32B27/22B32B27/32B32B33/00B32B2307/304B32B2307/3065B32B2307/558B29C48/92B29C2948/9258B29C2948/92704C08K2003/323C08L23/06C08L23/0876C08L2201/02C08L2201/22C08L2205/025C08L2205/03C08L2205/16C08L2207/062C08L97/02C08K13/04C08K7/24C08K3/32C08K5/3492C08K3/36
Inventor 方晓钟冯娟王潇翔丁浩李红李永乐姚红炎
Owner ANHUI GUOFENG WOOD PLASTIC COMPOSITE
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